COMBINED SUPPLY SYSTEM, AND CONTROLLER AND CONTROL METHOD THEREFOR
20250341318 ยท 2025-11-06
Inventors
Cpc classification
F24D3/08
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F24D19/1072
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
International classification
F24D19/10
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F24D3/18
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Abstract
The invention discloses a combined space and water heating system, and a controller and a control method thereof. The combined space and water heating system includes a first heat source. The control method of a combined space and water heating system includes the following steps: controlling the first heat source to supply a water heating load until the water heating load is met by the first heat source; and changing, when the water heating load is met by the first heat source and there is a demand for a space heating load, an operating state of the first heat source such that the space heating load is supplied on the basis that the water heating load is met; or controlling the first heat source to supply a space heating load until the space heating load is met by the first heat source; and changing, when the space heating load is met by the first heat source and there is a demand for a water heating load, an operating state of the first heat source such that the water heating load is supplied on the basis that the space heating load is met. The combined space and water heating system of this application can intelligently supply the water heating load and the space heating load.
Claims
1. A control method of a combined space and water heating system, characterized in that the combined space and water heating system comprises a first heat source, and the control method of a combined space and water heating system comprises the following steps: controlling the first heat source to supply a water heating load until the water heating load is met by the first heat source; and changing, when the water heating load is met by the first heat source and there is a demand for a space heating load, an operating state of the first heat source such that the space heating load is supplied on the basis that the water heating load is met; or controlling the first heat source to supply a space heating load until the space heating load is met by the first heat source; and changing, when the space heating load is met by the first heat source and there is a demand for a water heating load, an operating state of the first heat source such that the water heating load is supplied on the basis that the space heating load is met.
2. The control method of a combined space and water heating system according to claim 1, characterized in that the first heat source comprises at least two first sub-heat sources connected in parallel, and the step of changing the operating state of the first heat source comprises: increasing the number of the first sub-heat sources in operation; and/or increasing the operating power(s) of at least part of the first sub-heat sources that have been in operation.
3. The control method of a combined space and water heating system according to claim 2, characterized in that if there is a first sub-heat source not in operation, the number of such first sub-heat sources not in operation to be activated is determined based on the demand for the space heating load or the demand for the water heating load, and the newly activated first sub-heat source(s) is/are used for supplying the space heating load on the basis that the water heating load is met or used for supplying the water heating load on the basis that the space heating load is met.
4. The control method of a combined space and water heating system according to claim 2, characterized in that if all the first sub-heat sources are activated and a total operating power of all the first sub-heat sources does not reach a total maximum rated power of all the first sub-heat sources, the operating power(s) of at least part of all the first sub-heat sources is/are increased.
5. The control method of a combined space and water heating system according to claim 2, characterized in that if there is a first sub-heat source not in operation and a total operating power of such first sub-heat sources not in operation fails to meet a new demand for the space heating load or a new demand for the water heating load, when a total operating power of the first sub-heat sources that have been in operation does not reach a total maximum rated power of the first sub-heat sources that have been in operation, the first sub-heat source(s) not in operation is/are activated and the operating power(s) of at least part of the first sub-heat sources that have been in operation is/are increased.
6. The control method of a combined space and water heating system according to claim 4 or 5, characterized in that changing the operating state of the first heat source further comprises: reallocating all the first sub-heat sources that have been in operation such that a part of the first sub-heat sources that have been in operation supplies the water heating load and the other part supplies the space heating load.
7. The control method of a combined space and water heating system according to claim 1, characterized in that the first heat source comprises at least two first sub-heat sources connected in parallel, and when the first heat source supplies the space heating load, the space heating load is a cooling load and there is the demand for the water heating load, the step of changing the operating state of the first heat source comprises: keeping the number of the first sub-heat sources in a cooling state unchanged, and allowing, if there is a first sub-heat source not in operation, at least part of such first sub-heat sources not in operation to be used for supplying the water heating load; or when the first heat source supplies the water heating load, there is the demand for the space heating load and the space heating load is the cooling load, the step of changing the operating state of the first heat source comprises: keeping the number of the first sub-heat sources in a heating state unchanged, and allowing, if there is a first sub-heat source not in operation, at least part of such first sub-heat sources not in operation to be used for cooling to supply the space heating load.
8. The control method of a combined space and water heating system according to any of claims 1 to 5 and 7, characterized in that the combined space and water heating system further comprises a second heat source, and the second heat source is at least used for meeting the water heating load or the space heating load; and if an operation of the first heat source is more advantageous than an operation of the second heat source, when the water heating load is met by the first heat source and there is the demand for the space heating load, the operating state of the first heat source is changed such that the space heating load is supplied on the basis that the water heating load is met; or when the space heating load is met by the first heat source and there is the demand for the water heating load, the operating state of the first heat source is changed such that the water heating load is supplied on the basis that the space heating load is met.
9. The control method of a combined space and water heating system according to claim 8, characterized in that if the space heating load or the water heating load fails to be met after the step of changing the operating state of the first heat source is performed, the second heat source is operated.
10. The control method of a combined space and water heating system according to any of claims 1 to 5 and 7, characterized in that the combined space and water heating system further comprises a second heat source, and the second heat source is at least used for meeting the water heating load or the space heating load; changing, when the water heating load is met by the first heat source and there is the demand for the space heating load, the operating state of the first heat source, and operating the second heat source such that the space heating load is supplied on the basis that the water heating load is met; or changing, when the space heating load is met by the first heat source and there is the demand for the water heating load, the operating state of the first heat source, and operating the second heat source such that the water heating load is supplied on the basis that the space heating load is met.
11. The control method of a combined space and water heating system according to claim 10, characterized in that the step of changing the operating state of the first heat source, and operating the second heat source such that the water heating load is supplied on the basis that the space heating load is met comprises: controlling the first heat source to first heat water to a first preset temperature, and then controlling the second heat source to preform secondary heating on the water.
12. The control method of a combined space and water heating system according to any of claims 1 to 5 and 7, characterized in that the combined space and water heating system further comprises a second heat source, and the second heat source is at least used for meeting the water heating load or the space heating load; and if an operation of the second heat source is more advantageous than an operation of the first heat source, when the water heating load is met by the first heat source and there is the demand for the space heating load, the second heat source is preferentially operated such that the space heating load is supplied on the basis that the water heating load is met; or when the space heating load is met by the first heat source and there is the demand for the water heating load, the second heat source is preferentially operated such that the water heating load is supplied on the basis that the space heating load is met.
13. The control method of a combined space and water heating system according to claim 12, characterized in that after the second heat source is preferentially operated, if the space heating load or the water heating load is not met, the operating state of the first heat source is changed such that the space heating load or the water heating load is supplied.
14. The control method of a combined space and water heating system according to claim 8, characterized in that the first heat source comprises a heat pump or a gas water heater or an electric water heater, and the second heat source comprises a gas water heater or an electric water heater or a heat pump.
15. The control method of a combined space and water heating system according to any of claims 1 to 5 and 7, characterized in that after the operating state of the first heat source is changed such that the space heating load is supplied on the basis that the water heating load is met, if the water heating load increases, the number of the first sub-heat sources in operation for supplying the space heating load is reduced and the reduced number of the first sub-heat sources are used for supplying the increased water heating load; or after the operating state of the first heat source is changed such that the water heating load is supplied on the basis that the space heating load is met, if the space heating load increases, the number of the first sub-heat sources in operation for supplying the water heating load is reduced and the reduced number of the first sub-heat sources are used for supplying the space heating load.
16. The control method of a combined space and water heating system according to claim 15, characterized in that the combined space and water heating system further comprises a second heat source, and if the number of the first sub-heat sources in operation for supplying the water heating load is reduced, the second heat source is operated to supply the water heating load; or if the number of the first sub-heat sources in operation for supplying the space heating load is reduced, the second heat source is operated to supply the space heating load.
17. A controller of a combined space and water heating system, characterized in that the controller of a combined space and water heating system performs the control method of a combined space and water heating system according to any of claims 1 to 16.
18. A combined space and water heating system, characterized by comprising: the controller of a combined space and water heating system according to claim 17; a first heat source; a first flow channel and a second flow channel which can respectively communicate with the first heat source; and a first flow control device, configured to control the flows of a fluid of the first heat source diverted to the first flow channel and the second flow channel, the first flow channel and the second flow channel being configured to provide heat for a first terminal and a second terminal, respectively, the first terminal being configured to supply a water heating load, and the second terminal being configured to supply a space heating load.
19. The combined space and water heating system according to claim 18, characterized in that the first heat source comprises a plurality of first sub-heat sources, the plurality of first sub-heat sources are connected in parallel, the first flow control device comprises a plurality of first sub-flow control devices, the first flow channel comprises a plurality of first sub-flow channels, the second flow channel comprises a plurality of second sub-flow channels, and the first sub-flow control devices are each configured to control the flows of the fluid of the corresponding first sub-heat source diverted to the corresponding first sub-flow channel and the corresponding second sub-flow channel.
20. The combined space and water heating system according to claim 18 or 19, characterized in that the combined space and water heating system further comprises: a second heat source; a third flow channel and a fourth flow channel which can respectively communicate with the second heat source; and a second flow control device, configured to control the flows of a fluid of the second heat source diverted to the third flow channel and the fourth flow channel, the third flow channel and the fourth flow channel being configured to provide heat for the first terminal and the second terminal, respectively.
21. The combined space and water heating system according to claim 20, characterized in that the second heat source comprises a plurality of second sub-heat sources, the plurality of second sub-heat sources are connected in parallel, the second flow control device comprises a plurality of second sub-flow control devices, the third flow channel comprises a plurality of third sub-flow channels, the fourth flow channel comprises a plurality of fourth sub-flow channels, and the second sub-flow control devices are each configured to control the flows of the fluid of the corresponding second sub-heat source diverted to the corresponding third sub-flow channel and the corresponding fourth sub-flow channel.
22. The combined space and water heating system according to claim 20, characterized in that outlets of the second flow channel and the fourth flow channel are configured to communicate with the second terminal.
23. The combined space and water heating system according to claim 20, characterized in that the combined space and water heating system further comprises: a first heat exchanger having a first heat exchange flow channel and a second heat exchange flow channel, the second flow channel comprises the second heat exchange flow channel, the fourth flow channel comprises the first heat exchange flow channel, and the second flow channel is configured to communicate with the second terminal.
24. The combined space and water heating system according to claim 23, characterized in that the first heat exchanger comprises a plate heat exchanger.
25. The combined space and water heating system according to claim 20, characterized in that outlets of the first flow channel and the third flow channel are configured to communicate with the first terminal.
26. The combined space and water heating system according to claim 20, characterized in that the combined space and water heating system further comprises a second heat exchanger having a third heat exchange flow channel, and the first flow channel is configured to communicate with the third heat exchange flow channel; or the combined space and water heating system further comprises a third heat exchanger having a fourth heat exchange flow channel, and the third flow channel is configured to communicate with the fourth heat exchange flow channel.
27. The combined space and water heating system according to claim 20, characterized in that the combined space and water heating system further comprises a second heat exchanger having a third heat exchange flow channel and a fourth heat exchange flow channel; the first flow channel is configured to communicate with the third heat exchange flow channel; and the third flow channel is configured to communicate with the third heat exchange flow channel.
28. The combined space and water heating system according to claim 20, characterized in that the combined space and water heating system further comprises a second heat exchanger having a third heat exchange flow channel and a third heat exchanger having a fourth heat exchange flow channel, and the third heat exchanger communicates with the second heat exchanger; the first flow channel is configured to communicate with the third heat exchange flow channel; and the third flow channel is configured to communicate with the fourth heat exchange flow channel.
29. The combined space and water heating system according to claim 28, characterized in that the second heat exchanger has a first water storage chamber for storing water; the third heat exchanger has a second water storage chamber for storing water, and the first water storage chamber communicates with the second water storage chamber; the third heat exchange flow channel can exchange heat with the water stored in the first water storage chamber; the fourth heat exchange flow channel can exchange heat with the water stored in the second water storage chamber; a water outlet of the second heat exchanger communicating with the first water storage chamber can communicate with a water inlet of the third heat exchanger communicating with the second water storage chamber; a water inlet of the second heat exchanger communicating with the first water storage chamber is configured to communicate with a water source; and a water outlet of the third heat exchanger communicating with the second water storage chamber is configured to supply hot water.
30. The combined space and water heating system according to claim 19, characterized in that in the case that if there is a first sub-heat source not in operation, at least part of such first sub-heat sources not in operation is/are activated and the newly activated first sub-heat source(s) is/are used for supplying the space heating load on the basis that the water heating load is met or used for supplying the water heating load on the basis that the space heating load is met, each of the first sub-flow control devices comprises on-off valves respectively disposed in the first sub-flow channel and the second sub-flow channel or a three-way valve disposed at a position where the first sub-flow channel communicates with the second sub-flow channel.
31. The combined space and water heating system according to claim 30, characterized in that in the case that the newly activated first sub-heat source(s) is/are used for supplying the space heating load on the basis that the water heating load is met, the on-off valve(s) in the second sub-flow channel(s) corresponding to the newly activated first sub-heat source(s) is/are opened, and the on-off valve(s) in the first sub-flow channel(s) corresponding to the newly activated first sub-heat source(s) is/are closed; or the three-way valve(s) corresponding to the newly activated first sub-heat source(s) is/are switched to such a position that the second sub-flow channel communicates with the first sub-heat source and the first sub-flow channel does not communicate with the first sub-heat source.
32. The combined space and water heating system according to claim 30, characterized in that in the step that the newly activated first sub-heat source(s) is/are used for supplying the water heating load on the basis that the space heating load is met, the on-off valve(s) in the first sub-flow channel(s) corresponding to the newly activated first sub-heat source(s) is/are opened, and the on-off valve(s) in the second sub-flow channel(s) corresponding to the newly activated first sub-heat source(s) is/are closed; or the three-way valve(s) corresponding to the newly activated first sub-heat source(s) is/are switched to such a position that the first sub-flow channel communicates with the first sub-heat source and the second sub-flow channel does not communicate with the first sub-heat source.
33. The combined space and water heating system according to claim 21, characterized in that each of the second sub-flow control devices comprises on-off valves respectively disposed in the third sub-flow channel and the fourth sub-flow channel or a three-way valve disposed at a position where the third sub-flow channel communicates with the fourth sub-flow channel.
34. The combined space and water heating system according to claim 18, characterized in that the second terminal comprises at least one of a fan coil unit, a floor heating system, a radiator and in-wall heat exchange equipment.
35. The combined space and water heating system according to claim 20, characterized in that the first heat source comprises a heat pump or a gas water heater or an electric water heater, and the second heat source comprises a gas water heater or an electric water heater or a heat pump.
36. The combined space and water heating system according to claim 20, characterized in that the controller is configured to communicate with the first heat source and the second heat source by means of power line carrier communication or serial communication.
37. The combined space and water heating system according to claim 36, characterized in that the controller is further configured to communicate with the first flow control device and the second flow control device by means of power line carrier communication or serial communication.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0077] The accompanying drawings described herein are for explanatory purposes only and are not intended to limit the scope of the invention in any way. In addition, the shapes and sizes of the components in the drawings are purely schematic and are used to aid in understanding the invention, and they do not specifically limit the shapes and sizes of the components in the invention. Under the teaching of the invention, those skilled in the art can choose various possible shapes and sizes to implement the invention according to specific conditions.
[0078]
[0079]
[0080]
[0081]
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[0084] Reference signs in the accompanying drawings:
[0085] 1: first heat source; 11: first sub-heat source; 2: first flow channel; 21: first sub-flow channel; 3: second flow channel; 31: second sub-flow channel; 4: first flow control device; 41: first sub-flow control device; 5: second heat source; 6: third flow channel; 7: fourth flow channel; 8: second terminal; 9: first heat exchanger; 10: second heat exchanger; 12, third heat exchanger; 13: first return flow channel; 14: second return flow channel; 15: third return flow channel; 16: fourth return flow channel; 17: first terminal; 18: controller; 19; second flow control device; 20: first circulating pump; 22: second circulating pump; 23: water source.
DESCRIPTION OF THE EMBODIMENTS
[0086] The details of the invention can be understood more clearly in combination with the accompanying drawings and the description of specific implementations of the invention. However, the specific implementations of the invention described herein are only for the purpose of explaining the invention, and cannot be understood as limiting the invention in any way. Under the teaching of the invention, those skilled in the art can conceive any possible variations based on the invention, which should be regarded as belonging to the scope of the invention. It should be noted that when an element is referred to as being disposed on another element, it may be directly on the another element or there may be an intervening element. When an element is considered to be connected to another element, it may be directly connected to the another element or there may be an intervening element at the same time. The terms mounting, coupling and connection should be understood in a broad sense, for example, it may be a mechanical connection or an electrical connection, or an internal communication between two elements, or a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms can be understood according to specific conditions. The terms vertical, horizontal, upper, lower, left, right and similar expressions used herein are for illustrative purposes only, and do not represent the only implementation.
[0087] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of this application. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term and/or used herein includes any and all combinations of one or more related listed items.
[0088] In order to ensure that the combined space and water heating system intelligently supplies a water heating load and a space heating load, embodiments of this application provide a combined space and water heating system, and a controller and a control method thereof.
[0089] The first heat source 1 may be any device capable of providing heat, which may supply the provided heat, in a form of being carried by the fluid, to the first terminal 17 through the first flow channel 2 and/or to the second terminal 8 through the second flow channel 3. For example, the first heat source 1 may include a heat pump device or a gas water heater or an electric water heater or the like, which is not specifically limited in this application, and may also include any combination of the above devices. The first flow control device 4 controls the flows of the fluid of the first heat source 1 diverted to the first flow channel 2 and the second flow channel 3. For example, the first flow control device 4 may divert all the fluid to either the first flow channel 2 or the second flow channel 3, or divert the fluid partially to the first flow channel 2 and partially to the second flow channel 3. In addition, the first flow control device 4 may have a flow control function, i.e., it may arbitrarily control the flows of the fluid diverted to the first flow channel 2 and the second flow channel 3. The first flow control device 4 may be disposed at a position where the first flow channel 2 communicates with the second flow channel 3, and directly control the flows of the fluid of the first heat source 1 diverted to the first flow channel 2 and the second flow channel 3. There may also be two first flow control devices 4, which are respectively disposed in the first flow channel 2 and the second flow channel 3 and configured to control the flows of the fluid of the first heat source 1 diverted to the first flow channel 2 and the second flow channel 3 by respectively controlling the flow in the first flow channel 2 and the flow in the second flow channel 3. Through the first flow control device 4, the hot fluid provided by the first heat source 1 can be allocated reasonably, such that the first heat source can supply corresponding flows of the hot fluid according to different specific demands of the first terminal 17 and the second terminal 8, thereby meeting the changing demands of the first terminal 17 and the second terminal 8.
[0090] The first terminal 17 is configured to supply the water heating load, and may be a device capable of discharging hot water for a user. Specifically, the first terminal 17 may be a water heating device that can heat water and supply the heated water for use by the user, or a hot water discharge device, such as a faucet or a shower head commonly used in daily life, that can directly discharge a hot fluid, such as hot water, outputthrough the first flow channel 2 from the first heat source 1 for the user' use. The second terminal 8 is configured to supply the space heating load. The second terminal 8 may be a device for heat supply and space heating. For example, the second terminal 8 may include at least one of a fan coil unit, a floor heating system, a radiator, in-wall heat exchange equipment and the like, which is not specifically limited in this application.
[0091] As a feasible implementation,
[0092] Further, when both the first terminal 17 and the second terminal 8 need heat but for different temperatures, by means of the plurality of first sub-heat sources 11 connected in parallel, one part of the first sub-heat sources 11 and the other part of the first sub-heat sources 11 of the first heat source 1 may be respectively used for generating heat of different temperatures respectively supplied to the first terminal 17 and the second terminal 8. For example, the hot water supplied by the first terminal 17 needs to reach a high temperature, such as 80 C. or above, but the hot water supplied by the second terminal 8 for space heating only needs to reach about 65 C. In this case, one part of the first sub-heat sources 11 of the first heat source 1 may be used for generating a hot fluid of 80 C. or above, and the other part of the first sub-heat sources 11 may be used for generating a hot fluid of about 65 C., so that the hot fluids of different temperatures can be respectively supplied to the first terminal 17 and the second terminal 8 to meet two completely different temperature demands.
[0093] For another example, in hot weather, when the first terminal 17 supplies the water heating load and the space heating load supplied by the second terminal 8 is a cooling load, one part of the first sub-heat sources 11 of the first heat source 1 may be adjusted to a heating state to generate a hot fluid, which is delivered to the first terminal 17 through the first sub-flow control devices 41 to meet the water heating load of the first terminal 17, and the other part of the first sub-heat sources 11 are adjusted to a cooling state to generate a cold fluid, which is delivered to the second terminal 8 through the first sub-flow control devices 41 to meet the cooling load of the second terminal 8. Through the cooperation of the plurality of first sub-heat sources 11 connected in parallel and the first sub-flow control devices 41, the hot fluid and the cold fluid generated by different first sub-heat sources 11 can be respectively delivered to the first terminal 17 and the second terminal 8 to meet completely different types of heat demands.
[0094]
[0095] The second heat source 5 may be any device capable of providing heat, which may supply the provided heat, in a form of being carried by the fluid, to the first terminal 17 through the third flow channel 6 and/or to the second terminal 8 through the fourth flow channel 7. For example, the second heat source 5 may include a heat pump device or a gas water heater or an electric water heater or the like, which is not specifically limited in this application, and may also include any combination of the above devices. The second flow control device 19 controls the flows of the fluid of the second heat source 5 diverted to the third flow channel 6 and the fourth flow channel 7. The function and specific mounting position of the second flow channel's 3 control device are similar to those of the first flow channel's 2 control device and will not be described in detail here. Through the second flow control device 19, the hot fluid provided by the second heat source 5 can be allocated reasonably, such that the second heat source can supply corresponding flows of the hot fluid according to different specific demands of the first terminal 17 and the second terminal 8, thereby meeting the changing demands of the first terminal 17 and the second terminal 8.
[0096] Since the first heat source 1 can respectively supply the hot fluid or the cold fluid to the first terminal 17 and the second terminal 8 and the second heat source 5 can also respectively supply the hot fluid or the cold fluid to the first terminal 17 and the second terminal 8, through the control of the first flow control device 4 and the second flow control device 19, the fluid generated by the first heat source 1 can be supplied to the first terminal 17 and the second terminal 8 in a reasonable split flow, meanwhile the fluid generated by the second heat source 5 can also be supplied to the first terminal 17 and the second terminal 8 in a reasonable split flow, so that different loads required by the first terminal 17 and the second terminal 8 can be met reasonably and selectively. In addition, through the cooperation of the first heat source 1 and the second heat source 5, the load required by the first terminal 17 or the second terminal 8 can be met in a larger range at some time, which makes the whole combined space and water heating system have better performance in meeting both loads.
[0097] As a feasible implementation, the second heat source 5 may also include a plurality of second sub-heat sources, and the plurality of second sub-heat sources are connected in parallel. The second flow control device 19 includes a plurality of second sub-flow control devices, the third flow channel 6 includes a plurality of third sub-flow channels, the fourth flow channel 7 includes a plurality of fourth sub-flow channels, and the second sub-flow control devices are each configured to control the flows of the fluid of the corresponding second sub-heat source diverted to the corresponding third sub-flow channel and the corresponding fourth sub-flow channel. Similarly, through the cooperation of the plurality of second sub-heat sources connected in parallel and the second sub-flow control devices, one part of the first sub-heat sources 11 and the other part of the first sub-heat sources 11 of the first heat source 1 may be respectively used for generating heat of different temperatures respectively supplied to the first terminal 17 and the second terminal 8; or the hot fluid and the cold fluid generated by different second sub-heat sources may be respectively delivered to the first terminal 17 and the second terminal 8 to meet completely different types of heat demands.
[0098] As a feasible implementation, in some embodiments, the second sub-flow control device may only need to control the fluid generated by the corresponding second sub-heat source to completely flow into the third sub-flow channel or the fourth sub-flow channel to supply the space heating load or water heating load that comes later. In these cases, the second sub-flow control device may include on-off valves respectively disposed in the third sub-flow channel and the fourth sub-flow channel or a three-way valve disposed at a position where the third sub-flow channel communicates with the fourth sub-flow channel.
[0099] In a feasible implementation, as shown in
[0100] In a feasible implementation,
[0101] In the above implementation, when the temperature of the fluid generated by the first heat source 1 in operation is not high enough or low enough, the fluid generated by the second heat source 5 in operation may be used to further increase or decrease the temperature of the fluid generated by the first heat source 1 in operation, so that the temperature of the fluid input to the second terminal 8 can ultimately meet the requirement. For example, when the first heat source 1 is a heat pump, during low ambient temperatures, the heat pump's performance in generating a high-temperature fluid is reduced, and it is not easy to generate a hot fluid with a high temperature to meet the demand of the second terminal 8. In this case, the second heat source 5 may be a gas water heater, an electric water heater or the like, which can generate a hot fluid with a high temperature. The hot fluid generated by the second heat source 5 is used to further heat the hot fluid with a lower temperature generated by the first heat source 1, so that the temperature of the fluid input to the second terminal 8 can ultimately meet the requirement. Since the heat pump has a higher energy efficiency ratio under many operating conditions (for example, when generating a fluid with a lower temperature), when the heat pump is used in combination with the second heat source 5 such as the gas water heater or the electric water heater, the combined space and water heating system can have good energy efficiency ratio and economic benefit while the demand of the second terminal 8 is met. Similarly, during high ambient temperatures, the heat pump's performance in generating a cold fluid is reduced, and it is not easy to generate a cold fluid with a low temperature to meet the demand of the second terminal 8. In this case, the second heat source 5 may be a heat pump, which can generate a cold fluid with a lower temperature and a lower flow. The cold fluid generated by the second heat source 5 is used to further cool the cold fluid with a higher temperature and a higher flow generated by the first heat source 1, so that the temperature of the fluidinput to the second terminal 8 can ultimately meet the requirement.
[0102] In order to further improve the heat exchange efficiency between the fluid generated by the first heat source 1 flowing through the second heat exchange flow channel of the first heat exchanger 9 and the fluid generated by the second heat source 5 flowing through the first heat exchange flow channel of the first heat exchanger 9, the first heat exchanger 9 may be a plate heat exchanger. In addition, the plate heat exchanger may further meet the high flow of the heat exchange fluids.
[0103] In a feasible implementation, the combined space and water heating system may include a second heat exchanger 10 having a third heat exchange flow channel, and the first flow channel 2 is configured to communicate with the third heat exchange flow channel. In this implementation, the hot fluid generated by the first heat source 1 may be delivered into the third heat exchange flow channel of the second heat exchanger 10 to exchange heat with the water in the second heat exchanger 10, so that the water in the second heat exchanger 10 can be heated, and the heated water in the second heat exchanger 10 can be discharged and supplied to the user. Similarly, the combined space and water heating system may include a third heat exchanger 12 having a fourth heat exchange flow channel, and the third flow channel 6 is configured to communicate with the fourth heat exchange flow channel. The hot fluid generated by the second heat source 5 may be delivered into the fourth heat exchange flow channel of the third heat exchanger 12 to exchange heat with the water in the third heat exchanger 12, so that the water in the third heat exchanger 12 can be heated, and the heated water in the third heat exchanger 12 can be discharged and supplied to the user. Certainly, the insides of the second heat exchanger 10 and the third heat exchanger 12 may respectively communicate with a water source 23 for replenishing water.
[0104] In another feasible implementation, the combined space and water heating system may include a second heat exchanger 10 having a third heat exchange flow channel and a fourth heat exchange flow channel. The first flow channel 2 is configured to communicate with the third heat exchange flow channel. The third flow channel 6 is configured to communicate with the third heat exchange flow channel. In this implementation, the hot fluid generated by the first heat source 1 may be delivered into the third heat exchange flow channel of the second heat exchanger 10 through the first flow channel 2 so as to exchange heat with the water in the third heat exchanger 12. The hot fluid generated by the second heat source 5 may be delivered into the fourth heat exchange flow channel of the second heat exchanger 10 through the third flow channel 6 so as to exchange heat with the water in the second heat exchanger 10. The first heat source 1 and the second heat source 5 can exchange heat with the water in the second heat exchanger 10 at the same time, which can further increase the speed of heating water in the second heat exchanger 10, so as to reduce the waiting time of the user.
[0105] In still another feasible implementation, as shown in
[0106] In the above implementation, further, as shown in
[0107] In this structure, water of the water source 23 may first enter the first water storage chamber of the second heat exchanger 10, and then be preliminarily heated to a first preset temperature by the hot fluid of the first heat source 1 delivered to the third heat exchange flow channel. After the water in the third heat exchanger 12 is discharged and supplied to the user, the water at the first preset temperature in the first water storage chamber of the second heat exchanger 10 can be replenished into the second water storage chamber of the third heat exchanger 12. Then, the hot fluid of the second heat source 5 delivered to the fourth heat exchange flow channel can preform secondary heating on the water in the third heat exchanger 12 to a higher temperature. With the above heating manner, different capacities of the first heat source 1 and the second heat source 5 to generate hot fluids can be utilized in a stepwise manner, so as to improve the energy efficiency ratio of the whole combined space and water heating system.
[0108] For example, when the first heat source 1 is a heat pump and the second heat source 5 is a gas water heater or an electric water heater, since the heat pump has a higher energy efficiency ratio and very high cost performance advantage when generating a hot fluid with a lower temperature, but has a much lower energy efficiency ratio and lower cost performance when generating a fluid with a higher temperature, the heat pump may preliminarily heat the water that has just been replenished into the first water storage chamber of the second heat exchanger 10 to the first preset temperature, and then the hot fluid generated by the gas water heater or the electric water heater may be used to preform secondary heating on the water flowing into the third heat exchanger 12 to a higher temperature.
[0109] As a feasible implementation, as shown in
[0110] In order to drive the fluids to flow in the first flow channel 2 and the second flow channel 3, correspondingly, as shown in
[0111] In a first embodiment of this application,
[0112] S101: Controlling a first heat source 1 to supply a water heating load until the water heating load is met by the first heat source 1.
[0113] S102: Changing, when the water heating load is met by the first heat source 1 and there is a demand for a space heating load, an operating state of the first heat source 1 such that the space heating load is supplied on the basis that the water heating load is met.
[0114] In this embodiment, when the water heating load comes first or when the first heat source 1 of the combined space and water heating system is used for preferentially meeting the water heating load, for example, when the first terminal 17 needs the water heating load, the first heat source 1 is controlled to supply the water heating load to the first terminal 17 until the water heating load of the first terminal 17 is met by the first heat source 1. The water heating load may refer to a load required when a device capable of discharging hot water for user's user heats water, for example, a load required for keeping a supply of hot water with a preset temperature, or a load required for keeping heating water at a set heating speed. Here, the water heating load is met by the first heat source 1 may specifically include the following situations: Thermal power output by the first heat source 1 to the first terminal 17 through the hot fluid per unit of time meets the demand of the first terminal 17 within the unit of time (for example, when the first terminal 17 has a demand for hot water with a preset temperature, the first heat source 1 may be in an operating state to ensure the supply of the hot water with the preset temperature). When the water heating load is met by the first heat source 1 and there is the demand for the space heating load, for example, when the demand for the space heating load comes subsequently at the second terminal 8 or when the demand for the space heating load at the second terminal 8 and the demand for the water heating load at the first terminal 17 come at the same time, the operating state of the first heat source 1 is changed such that the first heat source 1 can also supply the space heating load to the second terminal 8 on the basis that the water heating load continues to be met. The space heating load may refer to a load required when a device for heat supply and space heating supplies heat, for example, a load required for keeping a supply of a space heating fluid with a preset temperature.
[0115] In a second embodiment of this application,
[0116] S101: Controlling a first heat source 1 to supply a space heating load until the space heating load is met by the first heat source 1.
[0117] S102: Changing, when the space heating load is met by the first heat source 1 and there is a demand for a water heating load, an operating state of the first heat source 1 such that the water heating load is supplied on the basis that the space heating load is met.
[0118] In this embodiment, when the space heating load comes first or when the first heat source 1 of the combined space and water heating system is used for preferentially meeting the space heating load, for example, when the second terminal 8 needs the space heating load, the first heat source 1 is controlled to supply the space heating load to the second terminal 8 until the space heating load of the second terminal 8 is met by the first heat source 1. Here, the space heating load is met by the first heat source 1 may specifically include the following situations: Thermal power output by the first heat source 1 to the second terminal 8 through the hot fluid per unit of time meets the demand of the second terminal 8 within the unit of time (for example, in order to keep the indoor temperature gradually increasing to a preset temperature, the first heat source 1 may be in an operating state to ensure the increase of the indoor temperature). When the space heating load is met by the first heat source 1 and there is the demand for the water heating load, for example, when the demand for the water heating load comes subsequently at the first terminal 17 or when the demand for the space heating load at the second terminal 8 and the demand for the water heating load at the first terminal 17 come at the same time, the operating state of the first heat source 1 is changed such that the first heat source 1 can also supply the water heating load to the first terminal 17 on the basis that the space heating load continues to be met.
[0119] The control method of the combined space and water heating system as described above can ensure that the combined space and water heating system intelligently supplies the water heating load and the space heating load. Specifically, after one of the water heating load and the space heating load is preferentially met by the first heat source 1 or the first heat source 1 is configured to preferentially meet one of the water heating load and the space heating load, when the other of the water heating load and the space heating load comes subsequently or simultaneously, if the first heat source 1 has an excess output load, the first heat source can change its operating state to supply the excess output load to the water heating load or the space heating load that comes subsequently or to the load with lower priority on the premise that the load that comes first or the load with higher priority is continuously met. This can prevent the first heat source 1 from an insufficient supply of the load that comes first due to the appearance of the other load, or prevent the first heat source 1 from an insufficient supply of the load with higher priority due to the appearance of both of the two loads. Moreover, the first heat source 1 can take into account the load that comes subsequently or the load with lower priority to some extent, so that the first heat source 1 can be utilized to the maximum extent.
[0120] In the above two embodiments, in step S102, when the first heat source 1 is a single heat source, changing the operating state of the first heat source 1 may specifically include: increasing an operating power of the first heat source 1 such that the part of the power increased by the first heat source 1 is supplied to one of the water heating load and the space heating load that comes subsequently. The first flow control device 4 may divert the fluid corresponding to the part of the power increased by the first heat source 1 to the flow channel corresponding to the one of the water heating load and the space heating load that comes subsequently.
[0121] When the first heat source 1 includes at least two first sub-heat sources 11 connected in parallel, changing the operating state of the first heat source 1 may specifically include: increasing the number of the first sub-heat sources 11 in operation; and/or increasing the operating power(s) of at least part of the first sub-heat sources 11 that have been in operation.
[0122] Specifically, if there is a first sub-heat source 11 not in operation, the number of such first sub-heat sources 11 not in operation to be activated is determined based on the demand for the space heating load or the water heating load that comes subsequently or that has a lower supply priority for the first heat source 1, and the newly activated first sub-heat source(s) 11 is/are used for supplying the space heating load on the basis that the water heating load is met or used for supplying the water heating load on the basis that the space heating load is met. When the power(s) of the first sub-heat source(s) 11 not in operation can meet the demand for the space heating load or the water heating load that comes subsequently, the demand for the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1 can be met by using the above method. Since the newly activated first sub-heat source(s) 11 is/are disposed in parallel with the previously activated first sub-heat source(s) 11, the newly activated first sub-heat source(s) 11 can operate completely independently. Thereby, the operating mode (which may include, for example, a cooling mode or a heating mode) of the newly activated first sub-heat source(s) 11 or the temperature of the same type of the fluid produced (hot fluid or cold fluid) may be different from that of the previously activated first sub-heat source(s) 11, so that the supply of the demand for the space heating load or the water heating load that comes subsequently or that has lower priority can be met. This demand may be a completely different type of heat demand from the previously activated first sub-heat source(s) 11, or a completely different temperature demand from the previously activated first sub-heat source(s) 11, so that the operation of the previously activated first sub-heat source(s) 11 is not affected. Through the above steps, completely different temperature demands or different types of heat demands of the first terminal 17 and the second terminal 8 can be met.
[0123] In this implementation, since the first sub-flow control device 41 only needs to control the fluid generated by the corresponding first sub-heat source 11 to completely flow into the first sub-flow channel 21 or the second sub-flow channel 31 so as to supply the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, the first sub-flow control device 41 may include on-off valves respectively disposed in the first sub-flow channel 21 and the second sub-flow channel 31 or a three-way valve disposed at a position where the first sub-flow channel 21 communicates with the second sub-flow channel 31.
[0124] If all the first sub-heat sources 11 are activated and a total operating power of all the first sub-heat sources 11 does not reach a total maximum rated power of all the first sub-heat sources 11, the operating power(s) of at least part of all the first sub-heat sources 11 may be increased. With the above method, the demand for the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1 can be met on the premise that all the first sub-heat sources 11 are activated. The first sub-flow control device 41 may divert the fluid corresponding to the part of the power increased by the first sub-heat source 11 to the flow channel corresponding to one of the water heating load and the space heating load that comes subsequently, so as to supply the one of the water heating load and the space heating load that comes subsequently.
[0125] If there is a first sub-heat source 11 not in operation and a total operating power of such first sub-heat sources 11 not in operation fails to meet a new demand for the space heating load or a new demand for the water heating load, when a total operating power of the first sub-heat sources 11 that have been in operation does not reach a total maximum rated power of the first sub-heat sources 11 that have been in operation, the first sub-heat source(s) 11 not in operation may be activated and the operating power(s) of at least part of the first sub-heat sources 11 that have been in operation may be increased. When the power(s) of the first sub-heat source(s) 11 not in operation fails (fail) to meet the demand for the space heating load or the water heating load that comes subsequently, the above method may be used to increase the output power of the first heat source 1 to the greatest extent, thereby meeting the demand for the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1 to the greatest extent. In this step, the first sub-flow control device 41 may divert the fluid corresponding to the part of the power increased by the first sub-heat source 11 to the flow channel corresponding to one of the water heating load and the space heating load that comes subsequently or that has lower supply priority for the first heat source 1, and the fluid output by the newly activated first sub-heat source(s) 11 is delivered to the flow channel corresponding to one of the water heating load and the space heating load that comes subsequently or that has lower supply priority for the first heat source 1, and ultimately supplied to the one of the water heating load and the space heating load that comes subsequently or that has lower supply priority for the first heat source 1.
[0126] In the step of changing the operating state of the first heat source 1 above, if the operating power(s) of at least part of the first sub-heat sources 11 that have been in operation is/are increased, optionally, all the first sub-heat sources 11 that have been in operation may be reallocated, such that a part of the first sub-heat sources that have been in operation supplies the water heating load, while the other part supplies the space heating load. This can avoid the need for the fluid output by one first sub-heat source 11 to be divided into two parts by the first sub-flow control device 41 to supply the water heating load and the space heating load respectively. Especially when the temperatures of the fluids required by the water heating load and the space heating load are different, with the above method, the plurality of first sub-heat sources 11 can be divided into two parts, and the two parts of the first sub-heat sources 11 can generate fluids with different temperatures to supply the water heating load and the space heating load respectively.
[0127] When the first heat source 1 supplies the space heating load, and the space heating load is a cooling load and there is the demand for the water heating load, changing the operating state of the first heat source 1 may include: keeping the number of the first sub-heat sources 11 operating in a cooling state unchanged, and allowing, if there is a first sub-heat source 11 not in operation, at least part of such first sub-heat sources 11 not in operation to be used for supplying the water heating load. Alternatively, when the first heat source 1 supplies the water heating load, and there is the demand for the space heating load and the space heating load is the cooling load, changing the operating state of the first heat source 1 may include: keeping the number of the first sub-heat sources 11 operating in a heating state unchanged, and allowing, if there is a the first sub-heat source 11 not in operation, at least part of such first sub-heat sources 11 not in operation to be used for cooling to supply the space heating load.
[0128] In the above case, the first heat source 1 includes a type of device capable of generating both a cooling load and a heating load, such as a plurality of heat pumps connected in parallel. When thermal loads of the fluids required for the water heating load and the space heating load are different, the method described above allows the plurality of first sub-heat sources 11 to be divided into two parts, and the two parts of the first sub-heat sources 11 operate in different operating modes, namely a cooling mode and a heating mode, so that fluids with different thermal loads can be generated to respectively supply the space heating load and the water heating load.
[0129] Further, the control method of a combined space and water heating system may further include the following steps:
[0130] For the first embodiment, after the operating state of the first heat source 1 is changed such that the space heating load is supplied on the basis that the water heating load is met, if the water heating load increases, the number of the first sub-heat sources 11 in operation for supplying the space heating load is reduced and the reduced number of the first sub-heat sources are used for supplying the increased water heating load. For the second embodiment, after the operating state of the first heat source 1 is changed such that the water heating load is supplied on the basis that the space heating load is met, if the space heating load increases, the number of the first sub-heat sources 11 in operation for supplying the water heating load is reduced and the reduced number of the first sub-heat sources are used for supplying the increased space heating load. Through the above step, after the first heat source 1 supplies both the water heating load and the space heating load at the same time, if the water heating load or the space heating load that is preferentially supplied or that has higher priority increases, then the number of the first sub-heat sources 11 in operation corresponding to the space heating load or the water heating load that comes subsequently or that has lower priority is reduced, and the reduced number of the first sub-heat sources are used for supplying the water heating load or the space heating load that is preferentially supplied or that has higher priority. In this way, the water heating load or the space heating load that is preferentially supplied or that has higher priority is always met preferentially, even if there are changes subsequently to the water heating load or the space heating load that is preferentially supplied or that has higher priority.
[0131] In step S102 of the first embodiment, in a case that the combined space and water heating system includes a second heat source 5 and the second heat source 5 may also be used for meeting the space heating load, if an operation of the first heat source 1 is more advantageous than an operation of the second heat source 5, when the water heating load is met by the first heat source 1 and there is the demand for the space heating load, the operating state of the first heat source 1 is changed such that the space heating load is supplied on the basis that the water heating load is met. Similarly, in step S102 of the second embodiment, in a case that the combined space and water heating system includes a second heat source 5 and the second heat source 5 may also be used for meeting the water heating load, if an operation of the first heat source 1 is more advantageous than an operation of the second heat source 5, when the space heating load is met by the first heat source 1 and there is the demand for the water heating load, the operating state of the first heat source 1 is changed such that the water heating load is supplied on the basis that the space heating load is met. This advantage may be an energy efficiency ratio advantage or a cost performance advantage.
[0132] Through the steps of the method above, in the case where the combined space and water heating system has the second heat source 5 that can be used for meeting the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, when there is the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, the first heat source 1 which is more advantageous is used preferentially to supply the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1. When the advantage is the energy efficiency ratio advantage, the whole combined space and water heating system can be more energy-saving and environmentally-friendly during the operation process. When the advantage is the cost performance advantage, the whole combined space and water heating system can save more operating cost during the operation process.
[0133] If the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1 fails to be met after the step of changing the operating state of the first heat source 1 is performed, the second heat source 5 is operated to further supply the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, so that the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1 can be met to the greatest extent.
[0134] In step S102 of the first embodiment, on the premise that the combined space and water heating system includes the second heat source 5 and the second heat source 5 may also be used for meeting the space heating load, when the water heating load is met by the first heat source 1 and there is the demand for the space heating load, the operating state of the first heat source 1 may be changed, and the second heat source 5 may be operated, such that the space heating load is supplied on the basis that the water heating load is met.
[0135] In the above step, the power of the first heat source 1 may be increased, and the second heat source 5 may be operated, such that the total power increased by the first heat source 1 and the second heat source 5 can be used for supplying the space heating load. Increasing the power of the first heat source 1 described above is increasing the total power of the first heat source 1, which may include activating the first sub-heat source(s) 11 not in operation, and/or increasing the power(s) of at least part of the first sub-heat sources 11 that have been in operation, or improving the power of a single first heat source 1, or the like. The power of the first heat source 1 is increased, and the fluid corresponding to the part of the power increased by the first heat source 1 is diverted by the first flow control device 4 to the second flow channel 3 to supply the space heating load. The second heat source 5 is operated, and in a feasible implementation, the fluid corresponding to the power generated by the second heat source 5 in operation is diverted by the second flow control device 19 to the fourth flow channel 7 to supply the space heating load. In another feasible implementation, the second heat source 5 is operated, and the fluid corresponding to the power generated by the second heat source 5 in operation is diverted by the second flow control device 19 to further increase or decrease the temperature of the fluid generated by the first heat source 1 in operation, so that the temperature of the fluid input to the second terminal 8 can ultimately meet the requirement. Specifically, the fluid corresponding to the part of the power increased by the first heat source 1 is diverted by the second flow control device 19, flows through the second heat exchange flow channel of the first heat exchanger 9, and then is delivered into the second terminal 8, and the fluid generated by the second heat source 5 is diverted by the second flow control device 19 into the first heat exchange flow channel of the first heat exchanger 9. During this period, the fluid generated by the second heat source can exchange heat with the fluid generated by the first heat source 1 flowing through the second heat exchange flow channel so as to further increase or decrease the temperature of the fluid generated by the first heat source 1. With the above method, the heat or cold carried by the fluid generated by the second heat source 5 is delivered to the second terminal 8 through the fluid generated by the first heat source 1.
[0136] Similarly, in step S102 of the second embodiment, on the premise that the combined space and water heating system includes the second heat source 5 and the second heat source 5 may also be used for meeting the space heating load, when the space heating load is met by the first heat source 1 and there is the demand for the water heating load, the operating state of the first heat source 1 is changed, and the second heat source 5 is operated such that the water heating load is supplied on the basis that the space heating load is met.
[0137] In the above step, the power of the first heat source 1 may be increased, and the second heat source 5 may be operated, such that the total power increased by the first heat source 1 and the second heat source 5 can be used for supplying the water heating load. Similarly, increasing the power of the first heat source 1 is increasing the total power of the first heat source 1, which may include activating the first sub-heat source(s) 11 not in operation, and/or increasing the power(s) of at least part of the first sub-heat sources 11 that have been in operation, or increasing the power of a single first heat source 1.
[0138] For example, the first heat source 1 and the second heat source 5 may be used together to heat hot water. For example, the hot fluid generated by the first heat source 1 may be delivered into the third heat exchange flow channel of the second heat exchanger 10 through the first flow channel 2 so as to exchange heat with the water in the third heat exchanger 12. The hot fluid generated by the second heat source 5 may be delivered into the fourth heat exchange flow channel of the second heat exchanger 10 through the third flow channel 6 so as to exchange heat with the water in the third heat exchanger 12. For another example, the hot fluid generated by the first heat source 1 may be delivered into the third heat exchange flow channel of the second heat exchanger 10 so as to exchange heat with the water in the second heat exchanger 10, so that the water in the second heat exchanger 10 can be heated. The hot fluid generated by the second heat source 5 may be delivered into the fourth heat exchange flow channel of the third heat exchanger 12 to exchange heat with the water in the third heat exchanger 12, so that the water in the third heat exchanger 12 can be heated, and the heated water in the third heat exchanger 12 can also be discharged and supplied to the user.
[0139] For another example, the first heat source 1 may be controlled to heat water to a first preset temperature, and then the second heat source 5 is controlled to perform secondary heating on the water. For example, the combined space and water heating system includes a second heat exchanger 10 having a third heat exchange flow channel and a third heat exchanger 12 having a fourth heat exchange flow channel, the third heat exchanger 12 communicates with the second heat exchanger 10, the second heat exchanger 10 has a first water storage chamber for storing water, the third heat exchanger 12 has a second water storage chamber for storing water, and the first water storage chamber communicates with the second water storage chamber so that the third heat exchanger 12 can communicate with the second heat exchanger 10; and the third heat exchange flow channel can exchange heat with the water stored in the first water storage chamber, the fourth heat exchange flow channel can exchange heat with the water stored in the second water storage chamber, a water outlet of the second heat exchanger 10 communicating with the first water storage chamber can communicate with a water inlet of the third heat exchanger 12 communicating with the second water storage chamber, a water inlet of the second heat exchanger 10 communicating with the first water storage chamber is configured to communicate with a water source 23, and a water outlet of the third heat exchanger 12 communicating with the second water storage chamber is configured to supply hot water. In this case, the hot fluid generated by the first heat source 1 may be controlled to flow into the third heat exchange flow channel through the first flow channel 2, and the hot fluid generated by the second heat source 5 may be controlled to flow into the fourth heat exchange flow channel through the third flow channel 6. With the above method, different capacities of the first heat source 1 and the second heat source 5 to generate hot fluids can be utilized in a stepwise manner, so as to improve the energy efficiency ratio of the whole combined space and water heating system.
[0140] In step S102 of the first embodiment, if the operation of the second heat source 5 is more advantageous than the operation of the first heat source 1, when the water heating load is met by the first heat source 1 and there is the demand for the space heating load, the second heat source 5 is preferentially operated, such that the space heating load is supplied on the basis that the water heating load is met. In step S102 of the second embodiment, if the operation of the second heat source 5 is more advantageous than the operation of the first heat source 1, when the space heating load is met by the first heat source 1 and there is the demand for the water heating load, the second heat source 5 is preferentially operated, such that the water heating load is supplied on the basis that the space heating load is met.
[0141] Through the above method, when there is the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, the more advantageous heat source may be preferentially operated to supply the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, so that the whole combined space and water heating system can have a higher energy efficiency ratio and be more energy-saving and environmentally-friendly during the operation process, or the whole combined space and water heating system can have higher cost performance and save more operating cost during the operation.
[0142] After the steps above, if the space heating load or the water heating load is not met after the second heat source 5 is preferentially operated, the operating state of the first heat source 1 is changed such that the space heating load or the water heating load is supplied, so that the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1 can be met to the greatest extent.
[0143] Further, when the combined space and water heating system includes the second heat source 5, in the first embodiment, after the operating state of the first heat source 1 is changed such that the space heating load is supplied on the basis that the water heating load is met, if the water heating load increases, the number of the first sub-heat sources 11 in operation for supplying the space heating load is reduced and the reduced number of the first sub-heat sources are used for supplying the increased water heating load. If the number of the first sub-heat sources 11 in operation for supplying the water heating load is reduced, the second heat source 5 may be operated to supply the water heating load. In the second embodiment, after the operating state of the first heat source 1 is changed such that the water heating load is supplied on the basis that the space heating load is met, if the space heating load increases, the number of the first sub-heat sources 11 in operation for supplying the water heating load is reduced and the reduced number of the first sub-heat sources are used for supplying the increased space heating load. If the number of the first sub-heat sources 11 in operation for supplying the space heating load is reduced, the second heat source 5 may be operated to supply the space heating load.
[0144] Through the steps above, when there is the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1, if the water heating load or the space heating load that is preferentially supplied or that has higher supply priority for the first heat source 1 increases, the operating state of the first heat source 1 is changed preferentially, so that the water heating load or the space heating load that is preferentially supplied or that has higher supply priority for the first heat source 1 can be met by the first heat source 1 alone as far as possible. Through operation of the second heat source 5, the reduction of the space heating load or the water heating load supplied by the first heat source 1 that comes subsequently or that has lower supply priority for the first heat source 1 can be compensated. In this way, the first heat source 1 can meet the water heating load or the space heating load that is preferentially supplied, and the operation of the second heat source 5 can meet the space heating load or the water heating load that comes subsequently or that has lower supply priority for the first heat source 1. Moreover, this can prevent the fluid of the second heat source 5 in operation from being split subsequently to the greatest extent.
[0145] A controller 18 of a combined space and water heating system in this application may perform the foregoing control method of a combined space and water heating system. Further, the combined space and water heating system in this embodiment of this application may include the controller 18 performing the foregoing control method of a combined space and water heating system. As a feasible implementation, the controller 18 may be configured to communicate with the first heat source 1 and the second heat source 5 by means of power line carrier communication or serial communication. The controller 18 may be configured to communicate with the first flow control device 4 and the second flow control device 19 by means of power line carrier communication or serial communication. Certainly, in other feasible implementations, the controller 18 may communicate with the first heat source 1, the second heat source 5, the first flow control device 4 and the second flow control device 19 by other existing means, such as electrical connection, or wired or wireless transmission.
[0146] All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term substantially composed of describing a combination should include the identified elements, ingredients, components or steps as well as other elements, ingredients, components or steps that do not substantially affect the basic novel features of the combination. The use of the term including or comprising to describe a combination of elements, ingredients, components or steps herein also contemplates implementations that are substantially composed of these elements, ingredients, components or steps. By using the term may here, it is intended that any of the described attributes that may include is optional. A plurality of elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step can be divided into a plurality of separate elements, ingredients, components or steps. The term a or an used to describe an element, ingredient, component or step is not intended to exclude other elements, ingredients, components or steps.
[0147] The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on differences from other embodiments, and for the same or similar parts between the embodiments, reference can be made to each other. The foregoing embodiments are merely for illustrating the technical ideas and features of the invention and are intended to allow those skilled in the art to understand the contents of the invention and implement them accordingly, and do not limit the protection scope of the invention. All equivalent changes or modifications made according to the spirit of the invention shall fall into the protection scope of the invention.