CONTROL METHOD OF HEAT PUMP SYSTEM AND HEAT PUMP SYSTEM

Abstract

The present disclosure provides a control method of the heat pump system and the heat pump system, wherein the method includes: determining priority information of an operation mode, wherein the operation mode includes: a hot water production mode and an air conditioning mode; controlling the heat pump system to operate according to an operation mode with the higher priority information, and acquiring the corresponding operation parameter; determining whether the operation parameter satisfies a preset condition; and controlling the heat pump system to switch to operate in the operation mode with the lower priority information, if yes.

Claims

1. A control method of a heat pump system, wherein the method comprises: determining priority information of an operation mode, wherein the operation mode comprises: a hot water production mode and an air conditioning mode; controlling the heat pump system to operate according to an operation mode with higher priority information, and acquiring a corresponding operation parameter, wherein the operation parameter comprises at least one of an operation duration, a water temperature of a domestic water tank in the heat pump system, and an end detection temperature corresponding to an end device; determining whether the operation parameter satisfies a preset condition; and controlling the heat pump system to switch to operate in an operation mode with lower priority information, if yes.

2. The method according to claim 1, wherein the step of acquiring a corresponding operation parameter comprises: acquiring a first operation parameter of the heat pump system when operating according to the hot water production mode when priority information of the hot water production mode is higher than priority information of the air conditioning mode, wherein the first operation parameter comprises at least one of a first hot water production operation duration, a first water temperature corresponding to the domestic water tank, and a first end detection temperature corresponding to the end device; or acquiring a second operation parameter of the heat pump system when operating according to the air conditioning mode when priority information of the air conditioning mode is higher than priority information of the hot water production mode, wherein the second operation parameter comprises at least one of a first air conditioning operation duration, a second water temperature corresponding to the domestic water tank, and a second end detection temperature corresponding to the end device.

3. The method according to claim 2, wherein the step of determining whether the operation parameter satisfies the preset condition when the operation parameter is the first operation parameter comprises: determining that the first operation parameter satisfies the preset condition when the first hot water production operation duration is not larger than a first hot water production maximum operation duration, and the first water temperature is not smaller than a first water temperature threshold; or determining that the first operation parameter satisfies the preset condition when the first hot water production operation duration is larger than the first hot water production maximum operation duration, and a different value between the first end detection temperature and the first temperature threshold is larger than a first temperature difference threshold.

4. The method according to claim 3, wherein the method further comprises: acquiring a third operation parameter when the heat pump system switches to operate in the air conditioning mode, wherein the third operation parameter comprises: a second air conditioning mode operation duration, a third water temperature corresponding to the domestic water tank, and a third end detection temperature corresponding to the end device; and controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter.

5. The method according to claim 4, wherein the step of controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter comprises: controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode when the third water temperature is smaller than a second water temperature threshold, and the second air conditioning mode operation duration is larger than a second air conditioning mode limiting duration.

6. The method according to claim 5, wherein the step of controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter comprises: controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode when the third water temperature is smaller than the second water temperature threshold, and the heat pump system stops due to reaching a temperature in the air conditioning mode.

7. The method according to claim 2, wherein the step of determining whether the operation parameter satisfies the preset condition when the operation parameter is the second operation parameter comprises: determining that the second operation parameter satisfies the preset condition when the first air conditioning operation duration is larger than a first air conditioning mode limiting duration, or the heat pump system stops due to reaching a temperature in the air conditioning mode.

8. The method according to claim 7, wherein the method further comprises: acquiring a fourth operation parameter when the heat pump system switches to operate in the hot water production mode, wherein the fourth operation parameter comprises: a second hot water production operation duration, a fourth water temperature corresponding to the domestic water tank, and a fourth end detection temperature corresponding to the end device; and controlling the heat pump system to re-switch to operate in the air conditioning mode from the hot water production mode when the fourth water temperature is not smaller than a third water temperature threshold; the second hot water production operation duration is larger than a second hot water production maximum operation duration; or a different value between the fourth end detection temperature and a second temperature threshold is larger than a second temperature difference threshold.

9. A heat pump system, comprising a controller and a three-way valve, wherein a first end of the three-way valve is connected to a heat pump host; a second end is connected to a domestic water tank; and a third end is connected to an end device, wherein the controller comprises a memory, a processor, and a computer program stored in the memory and operable in the processor, and the processor executes the computer program to realize the steps of the method according to claim 1.

10. A computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program executes the steps of the method according to claim 1 when run by a processor.

11. The heat pump system according to claim 9, wherein the step of acquiring a corresponding operation parameter comprises: acquiring a first operation parameter of the heat pump system when operating according to the hot water production mode when priority information of the hot water production mode is higher than priority information of the air conditioning mode, wherein the first operation parameter comprises at least one of a first hot water production operation duration, a first water temperature corresponding to the domestic water tank, and a first end detection temperature corresponding to the end device; or acquiring a second operation parameter of the heat pump system when operating according to the air conditioning mode when priority information of the air conditioning mode is higher than priority information of the hot water production mode, wherein the second operation parameter comprises at least one of a first air conditioning operation duration, a second water temperature corresponding to the domestic water tank, and a second end detection temperature corresponding to the end device.

12. The heat pump system according to claim 11, wherein the step of determining whether the operation parameter satisfies the preset condition when the operation parameter is the first operation parameter comprises: determining that the first operation parameter satisfies the preset condition when the first hot water production operation duration is not larger than a first hot water production maximum operation duration, and the first water temperature is not smaller than a first water temperature threshold; or determining that the first operation parameter satisfies the preset condition when the first hot water production operation duration is larger than the first hot water production maximum operation duration, and a different value between the first end detection temperature and the first temperature threshold is larger than a first temperature difference threshold.

13. The heat pump system according to claim 12, wherein the method further comprises: acquiring a third operation parameter when the heat pump system switches to operate in the air conditioning mode, wherein the third operation parameter comprises: a second air conditioning mode operation duration, a third water temperature corresponding to the domestic water tank, and a third end detection temperature corresponding to the end device; and controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter.

14. The heat pump system according to claim 13, wherein the step of controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter comprises: controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode when the third water temperature is smaller than a second water temperature threshold, and the second air conditioning mode operation duration is larger than a second air conditioning mode limiting duration.

15. The heat pump system according to claim 14, wherein the step of controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter comprises: controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode when the third water temperature is smaller than the second water temperature threshold, and the heat pump system stops due to reaching a temperature in the air conditioning mode.

16. The heat pump system according to claim 11, wherein the step of determining whether the operation parameter satisfies the preset condition when the operation parameter is the second operation parameter comprises: determining that the second operation parameter satisfies the preset condition when the first air conditioning operation duration is larger than a first air conditioning mode limiting duration, or the heat pump system stops due to reaching a temperature in the air conditioning mode.

17. The heat pump system according to claim 16, wherein the method further comprises: acquiring a fourth operation parameter when the heat pump system switches to operate in the hot water production mode, wherein the fourth operation parameter comprises: a second hot water production operation duration, a fourth water temperature corresponding to the domestic water tank, and a fourth end detection temperature corresponding to the end device; and controlling the heat pump system to re-switch to operate in the air conditioning mode from the hot water production mode when the fourth water temperature is not smaller than a third water temperature threshold; the second hot water production operation duration is larger than a second hot water production maximum operation duration; or a different value between the fourth end detection temperature and a second temperature threshold is larger than a second temperature difference threshold.

18. The computer readable storage medium according to claim 10, wherein the step of acquiring a corresponding operation parameter comprises: acquiring a first operation parameter of the heat pump system when operating according to the hot water production mode when priority information of the hot water production mode is higher than priority information of the air conditioning mode, wherein the first operation parameter comprises at least one of a first hot water production operation duration, a first water temperature corresponding to the domestic water tank, and a first end detection temperature corresponding to the end device; or acquiring a second operation parameter of the heat pump system when operating according to the air conditioning mode when priority information of the air conditioning mode is higher than priority information of the hot water production mode, wherein the second operation parameter comprises at least one of a first air conditioning operation duration, a second water temperature corresponding to the domestic water tank, and a second end detection temperature corresponding to the end device.

19. The computer readable storage medium according to claim 18, wherein the step of determining whether the operation parameter satisfies the preset condition when the operation parameter is the first operation parameter comprises: determining that the first operation parameter satisfies the preset condition when the first hot water production operation duration is not larger than a first hot water production maximum operation duration, and the first water temperature is not smaller than a first water temperature threshold; or determining that the first operation parameter satisfies the preset condition when the first hot water production operation duration is larger than the first hot water production maximum operation duration, and a different value between the first end detection temperature and the first temperature threshold is larger than a first temperature difference threshold.

20. The computer readable storage medium according to claim 19, wherein the method further comprises: acquiring a third operation parameter when the heat pump system switches to operate in the air conditioning mode, wherein the third operation parameter comprises: a second air conditioning mode operation duration, a third water temperature corresponding to the domestic water tank, and a third end detection temperature corresponding to the end device; and controlling the heat pump system to re-switch to operate in the hot water production mode from the air conditioning mode according to the third operation parameter.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present disclosure, the drawings to be used in the description of the specific embodiments or prior art will be briefly introduced below. It is obvious that the drawings in the following description are some embodiments of the present disclosure, and for persons of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive efforts.

[0021] FIG. 1 shows a flowchart of a control method of a heat pump system provided by an embodiment of the present disclosure;

[0022] FIG. 2 shows a structure diagram of a heat pump system provided by an embodiment of the present disclosure; and

[0023] FIG. 3 shows a structure diagram of the other heat pump system provided by an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

[0024] In order to make the purpose, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below in connection with the drawings. It is clear that the embodiments described are partial embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without making creative labor fall within the scope of protection of the present disclosure.

[0025] In order to facilitate understanding of the embodiments, the following is a detailed description of the embodiments of the present disclosure.

[0026] The embodiment of the present disclosure provides a control method of a heat pump system. As shown in FIG. 1, the method includes the following steps.

[0027] Step S102: determining priority information of an operation mode.

[0028] In practical application, the heat pump system includes a controller, a three-way valve, a heat pump host, a domestic water tank, and an end device, wherein a first end of the three-way valve is connected to the heat pump host; a second end is connected to the domestic water tank; and a third end is connected the end device, wherein the controller switches the operation modes by controlling the communication relationship of the three-way valve. For example, when the first end and the second end of the three-way valve are controlled to communicate, the output end of the heat pump host is connected to the input end of the domestic water tank at this time, so as to heat the water in the domestic water tank to meet the user's demand for the hot water production; and when the first end and the third end of the three-way valve are controlled to communicate, the output end of the heat pump host is connected to the input end of the end device at this time, and the heat pump host provides a heat source or a cold source to the end device, so that the end device heats or cools an external environment, so as to meet the user's air conditioning demand.

[0029] Therefore, the controller can realize the switching for the operation mode of the heat pump system by controlling the switching of the three-way valve. The operation mode includes a hot water production mode and an air conditioning mode, wherein the hot water production mode is used to meet the hot water production demand of the user; the air conditioning mode is used to meet the air conditioning demand of the user; and the air conditioning demand is divided into the heating mode meeting the heating demand and the cooling mode meeting the cooling demand. Under the normal condition, the heat pump system only runs one operation mode to meet the current demand of the user, e.g., the air conditioning mode is used to meet the air conditioning demand of the user. When the user needs to make the hot water, it further needs to control the heat pump system to switch the operation mode, which reduces the comfort degree of the user.

[0030] Based on this, in order to satisfy the hot water production demand and the air conditioning demand of the user, the heat pump system in the embodiment of the present disclosure automatically switches the operation mode by controlling the switching of the three-way valve. The priority information is set for the operation mode according to the demands of the user, wherein when the heat pump system is turned on, the user manually sets the priority information of the operation mode, and the controller of the heat pump system can control the heat pump system to switch the operation mode according to the priority information. In the priority setting operation of the operation mode, the user can set it by the mobile terminal communicatively connected to the heat pump system. The mobile terminal herein includes, but is not limited to a cell phone and a remote control terminal, or the setting operation can be realized by the control panel of corresponding to the heat pump system, which can be set according to the actual situation.

[0031] Step S104: controlling the heat pump system to operate according to an operation mode with the higher priority information, and acquiring the corresponding operation parameter.

[0032] After the priority information of each operation mode above is determined, the controller controls the heat pump system to operate according to the operation mode with the higher priority information, so as to meet the user's demand of higher priority information. When the user enters the house from the outside in summer, the user's air conditioning demand is higher than the hot water production demand at this time. Therefore, the user sets the priority information of the air conditioning mode to be higher than the priority information of the hot water production mode, and the controller controls the heat pump system to preferentially operate the air conditioning demand, so as to satisfy the air conditioning demand of cooling for the user. Meanwhile, on the basis that the operation parameter is determined to satisfy the air conditioning demand, the heat pump system is controlled to switch to the hot water production mode, so as to satisfy the user's hot water production demand.

[0033] The operation parameter includes at least one of an operation duration, a water temperature of a domestic water tank in the heat pump system, and an end detection temperature corresponding to an end device, wherein the operation durations may be the hot water production operation durations or the air conditioning operation durations depending on the operation mode with the higher priority information, which is set according to the actual situation.

[0034] Additionally, the end device includes a buffer water tank and an air conditioning end, wherein the air conditioning end herein includes, but is not limited to a floor heating coil, a radiator group, and a fan coil. The end detection temperature herein may be the water temperature of the buffer water tank or the environment temperature corresponding to the air conditioning end, which can be set according to the actual situation. Also, the above water temperature and end detection temperature can be acquired by the temperature sensor or the temperature sensing bag, which is not limited by the embodiments of the present disclosure.

[0035] Step S106: determining whether the operation parameter satisfies a preset condition.

[0036] Step S108: controlling the heat pump system to switch to operate in the operation mode with the lower priority information, if yes.

[0037] When the operation parameter of the above heat pump system operating according to the operation mode with the higher priority information satisfies the preset condition, it means that the heat pump system at this time has already satisfied the demand corresponding to the operation mode with the higher priority information for the user. The controller controls the heat pump system to switch to operate in the operation mode with the lower priority information at this time, so as to satisfy the demand corresponding to the operation mode with the lower priority information for the user. Therefore, the heat pump system switches the hot water production mode and the air conditioning mode according to the priority information by setting the priority information of the operation mode, which ensures the air conditioning effect and the hot water production effect of the heat pump system, so as to satisfy the user's hot water production demand and air conditioning demand at the same time, and improve the user's comfort degree.

[0038] In practical application, according to the most urgent demand of the user, it is mainly divided into two situations: the priority information of the hot water production mode is higher than the priority information of the air conditioning mode and the priority information of the air conditioning mode is higher than the priority information of the hot water production mode. The controlling processes of the heat pump system under these two situations are described in detail below.

[0039] (A1) If the priority information of the hot water production mode is higher than the priority information of the air conditioning mode, the heat pump system operates according to the hot water production mode as a priority at this time.

[0040] As shown in FIG. 2, in the heat pump system, the first end (i.e., end A) and the second end (i.e., end B) of the three-way valve 23 are communicated, and the output end of the heat pump host 21 is connected to the input end of the domestic water tank 24, so as to heat the water in the domestic water tank 24. Additionally, an integrated water module 22 is arranged between the heat pump host 21 and the three-way valve 23, wherein the integrated water module 22 herein includes, but is not limited to a first electric heating member EH1, a water pump, a plate heat exchanger, and a check valve, so that the heat source provided by the heat pump host 21 is transmitted to the domestic water tank 24.

[0041] Additionally, a second electric heating member EH2 is arranged in the domestic water tank 24 for heating the water in the domestic water tank 24, which improves the heating rate for the water in the domestic water tank 24; and the end device includes a buffer water tank 251 and an air conditioning end 252, wherein the specific function of each component can be referred to the prior art, and the embodiments of the present disclosure will not be repeated in detail herein.

[0042] When the heat pump system operates preferentially according to the hot water production mode, the controller acquires a first operation parameter when the heat pump system operates according to the hot water production mode, wherein the first operation parameter includes at least one of a first hot water production operation duration t.sub.1, a first water temperature T.sub.wt1, and a first end detection temperature T.sub.bt1. As shown in FIG. 2, the first hot water production operation duration herein t.sub.1 is the continuous operation duration of the heat pump system according to the hot water production mode; the first water temperature T.sub.wt1 is the water temperature in the domestic water tank 24 when the heat pump system preferentially operates according to the hot water production mode; and the first end detection temperature Tori is the temperature of the buffer water tank 251 when the heat pump system preferentially operates according to the hot water production mode.

[0043] The controller further determines in real time whether the above first operation parameter satisfies the preset condition, and controls the heat pump system to switch to air conditioning mode to operate when satisfying the preset condition. During the determining process, if the first operation parameter satisfies one of the following, the preset condition is satisfied.

[0044] {circle around (1)} If the first hot water production operation duration t.sub.1 is not larger than the first hot water production maximum operation duration t.sub.max1 (preferably 120 min), and the first water temperature T.sub.wt1 is not smaller than the first water temperature threshold T.sub.set1 (preferably 55 C.), i.e., when t.sub.1t.sub.max1 and T.sub.wt1T.sub.set1, it is determined that the first operation parameter satisfies the preset condition.

[0045] When the heat pump system preferentially operates according to the hot water production mode, since the second electric heating member EH2 is further arranged in the domestic water tank 24, the water temperature in the domestic water tank has reached the target setting temperature of the domestic water tank when the first hot water production operation duration t.sub.1t.sub.max1, i.e., T.sub.wt1T.sub.set1. It indicates that the heating of the domestic water tank is completed, and the controller controls the heat pump system to switch to the operation mode with the lower priority information, i.e., operating in the air conditioning mode.

[0046] {circle around (2)} If the first hot water production operation duration t.sub.1 is larger than the first hot water production maximum operation duration t.sub.max1, and the different value between the first end detection temperature T.sub.bt1 and the first temperature threshold T.sub.set_AC1 is larger than the first temperature difference threshold T1, it is determined that the first operation parameter satisfies the preset condition.

[0047] When t.sub.1>t.sub.max1, the heating of the domestic water tank is still not completed at this time. However, in order to ensure the user's air conditioning demand, it needs to determine whether or not to switch to the air conditioning mode in conjunction with the first end detection temperature T.sub.bt1 of the end device. Since the air conditioning mode includes the heating mode and the cooling mode, the values of the first temperature threshold T.sub.set_AC1 corresponding to different air conditioning modes are not the same. Preferably, under the cooling mode, the T.sub.set_AC1 is preferably 7 C.; and under the heating mode, the T.sub.set_AC1 is preferentially selected to be 45 C., and the T1 is preferentially selected to be 15 C.

[0048] Therefore, if the air conditioning mode is the cooling mode, wherein when t.sub.1>t.sub.max1 and T.sub.bt1T.sub.set_AC1 (7 C.)>T1 (15 C.), it is determined that the first operation parameter satisfies the preset conditions, so that it needs to control the heat pump system to switch the air conditioning mode (i.e., the cooling mode) to operate, so as to ensure a better hot water production effect and a better cooling effect. Similarly, if the air conditioning mode is the heating mode, when t.sub.1>t.sub.max1 and T.sub.set_AC1 (45 C.)T.sub.bt1>T1 (15 C.), i.e., when T.sub.bt1<T.sub.set_AC1 (45 C.)T1 (15 C.), the first operation parameter is determined to satisfy the preset condition, so that it needs to control the heat pump system to switch to the air conditioning mode (i.e., the heating mode) to operate, so as to ensure a better hot water production effect and a better heating effect.

[0049] Further, when the heat pump system switches to the air conditioning mode, the controller further acquires a third operation parameter when the heat pump system switches to the air conditioning mode to operate, wherein the third operation parameter includes: a second air conditioning mode operation duration, a third water temperature T.sub.wt3 corresponding to the domestic water tank, and a third end detection temperature corresponding to the end device; and the heat pump system is controlled to re-switch to operate in the hot water production mode from the air conditioning mode according to third operation parameter.

[0050] In one switching control method, the heat pump system is controlled to re-switch to operate in the hot water production mode from the air conditioning mode when the third water temperature T.sub.wt3 is smaller than the second water temperature threshold T.sub.set2, and the second air conditioning mode operation duration is larger than the second air conditioning mode limiting duration t.sub.L2. In another switching control method, the heat pump system is controlled to re-switch to operate in the hot water production mode from the air conditioning mode when the third water temperature is smaller than the second water temperature threshold T.sub.set2, and the heat pump system stops due to reaching temperature in the air conditioning mode.

[0051] Specifically, when the priority information of the hot water production mode is higher than the priority information of the air conditioning mode, the heat pump system preferentially operates the hot water production mode, and switches to the air conditioning mode from the hot water production mode after the first operation parameter satisfies the preset condition. At this time, during the operation process according to the air conditioning mode, the controller further acquires the corresponding operation parameter, i.e., the third operation parameter. When T.sub.wt3<T.sub.set2, and the second air conditioning mode operation duration >t.sub.L2, it indicates that the water temperature in the domestic water tank is lower than the second water temperature threshold T.sub.set2, and the operation duration of the heat pump system according to the air conditioning mode, i.e., the second air conditioning mode operation duration, exceeds the second air conditioning mode limiting duration t.sub.L2. Based on ensuring the air conditioning effect, the controller needs to control the heat pump system to re-switch to the hot water production mode with the higher priority information, so as to ensure the hot water effect of the heat pump system.

[0052] Additionally, besides ensuring the air conditioning effect according to the second air conditioning mode operation duration, it can also determine whether the heat pump system stops due to reaching temperature in the air conditioning mode, i.e., when T.sub.wt3<T.sub.set2 and when the heat pump system stops due to reaching temperature in the air conditioning mode, it means that the temperature of the water in the domestic water tank falls below the second water temperature threshold T.sub.set2 at this time, and the heat pump system stops due to reaching temperature in the air conditioning mode, so that the controller can control the heat pump system to re-switch to the hot water production mode with the higher priority information based on ensuring the air conditioning effect, so as to ensure the hot water effect of the heat pump system.

[0053] Further, when the heat pump system re-switches to the hot water production mode to operate from the air conditioning mode, the above (A1) process is repeated until the heat pump system stops.

[0054] It should be noted that the above T.sub.set2 is preferably determined according to the first water temperature threshold T.sub.set1, such as T.sub.set2=T.sub.set1hysteresis error (5 C.), and the second air conditioning mode limiting duration t.sub.L2 is preferably 90 min.

[0055] (A2) If the priority information of the air conditioning mode is higher than the priority information of the hot water production mode, the heat pump system operates according to the air conditioning mode as a priority at this time.

[0056] As shown in FIG. 3, in the heat pump system, the first end (i.e., end A) and the third end (i.e., end C) of the three-way valve 23 are communicated, and the output end of the heat pump host 21 is connected to the input end of the buffer water tank 251, so as to provide a heat source or a cold source to the buffer water tank 251, so that the buffer water tank 251 and the air conditioning end 251 heats or cools the external environment to satisfy the user's air conditioning demand.

[0057] When the heat pump system operates preferentially according to the cooling mode, the controller acquires a second operation parameter when the heat pump system operates according to the air conditioning mode at this time, wherein the second operation parameter includes one of a first air conditioning operation duration t.sub.2, a second water temperature T.sub.wt2, and a second end detection temperature T.sub.bt2. The first air conditioning operation duration t.sub.2 herein is a continuous operation duration of the heat pump system according to the air conditioning mode as a priority; the second water temperature T.sub.wt2 is the water temperature in the domestic water tank 24 when the heat pump system preferentially operates according to the air conditioning mode; and the second end detection temperature T.sub.bt2 is the temperature of the buffer water tank 251 when the heat pump system preferentially operates according to the air conditioning mode.

[0058] The controller further determines in real time whether the above second operation parameter satisfies the preset condition, and controls the heat pump system to switch to hot water production mode to operate when the preset condition is satisfied. During the determining process, if the first air conditioning operation duration t.sub.2 is larger than the first air conditioning mode limiting duration t.sub.L1, or the heat pump system stops due to reaching temperature in the air conditioning mode, i.e., when t.sub.2>t.sub.L1, or the air conditioning mode stops due to reaching temperature, it is determined that the second operation parameter satisfies the preset condition. It should be noted that the first air conditioning mode limiting duration t.sub.L1 and the second air conditioning mode limiting duration t.sub.L2 may be the same or different, and tui herein is preferably the same as t.sub.L2.

[0059] Specifically, when the priority information of the air conditioning mode is higher than the priority information of the air conditioning mode, the heat pump system preferentially operates the air conditioning mode, and switches to the hot water production mode from the air conditioning mode after the second operation parameter satisfies the preset conditions. Meanwhile, the controller further acquires a fourth operation parameter when the heat pump system switches to operate in the hot water production mode, wherein the fourth operation parameter includes: a second hot water production operation duration, a fourth water temperature T.sub.wt4 of the domestic water tank 24, and a fourth end detection temperature T.sub.bt4 corresponding to the buffer water tank 251.

[0060] For the fourth operation parameter, it only needs to meet any one of the following conditions: {circle around (1)} the fourth water temperature is not smaller than the third water temperature threshold, i.e. T.sub.wt4T.sub.set3, wherein T.sub.set3 and T.sub.set1 may be equal or unequal, and it is preferred to be equal herein, i.e., 55 C.; {circle around (2)} the second hot water production operation duration is >the second hot water production maximum operation duration t.sub.max2, wherein the second hot water production maximum operation duration t.sub.max2 may be equal or unequal to t.sub.max1, and it is preferred to be equal to t.sub.max1 herein, i.e., 120 min; and {circle around (3)} the different value between the fourth end detection temperature T.sub.bt4 and the second temperature threshold T.sub.set_AC2 is larger than the second temperature difference threshold T2, wherein T.sub.set_AC2 and T.sub.set_AC1 may be equal or unequal, and it is preferred to be equal herein. Additionally, T2 and T1 may be equal or unequal, and it is preferred to be equal herein, i.e., T.sub.set_AC2 is preferably 7 C. in the cooling mode; and T.sub.set_AC2 is preferably 45 C. in the heating mode, and T2 is preferably 15 C. At this time, T.sub.bt4T.sub.set_AC2 (7 C.)>T2 (15 C.) during the cooling mode; or T.sub.bt4<T.sub.set_AC2 (45 C.)T2 (15 C.) during the heating mode, which means that the hot water production demand is satisfied at this time, so that it needs to control the heat pump system to re-switch to the air conditioning mode to operate from the hot water production mode, so as to meet the air conditioning demand of the user based on satisfying the hot water production demand.

[0061] Further, when the heat pump system re-switches to the air conditioning mode to operate from the hot water production mode, the above (A2) process is repeated until the heat pump system stops.

[0062] It is to be noted that the above first hot water production operation duration and the second hot water production operation duration are used to differentiate continuous operation durations of the heat pump system according to the hot water production mode under different situations. Similarly, the first air conditioning operation duration and the second air conditioning operation duration are used to differentiate continuous operation durations of the heat pump system according to the air conditioning mode under different situations; the first water temperaturethe fourth water temperature are used to represent water temperatures of the domestic water tank when the heat pump system operates according to different operation modes; and the first end detection temperaturethe fourth end detection temperature are used to represent temperatures of the buffer water tank when the heat pump system operates according to different operation modes. It should be noted that when the end detection temperature is the environment temperature corresponding to the air conditioning end, it can refer to the above embodiments, and the embodiments of the present disclosure will not be described in detail herein.

[0063] Additionally, the heat pump system stops due to reaching temperature in the above (A1) and (A2), which means that the heat pump system stops due to reaching the temperature in the air conditioning mode after reaching the corresponding target temperature, which can be referred to the prior art, and the embodiments of the present disclosure will not be repeated in detail herein.

[0064] In summary, the control method of the heat pump system provided by the embodiments of the present disclosure controls the heat pump system to operate in the operation mode with the higher priority information by setting priority information of the operation mode, and controls the heat pump system to switch to the operation mode with the lower priority information when the operation parameters including the operation duration, the water temperature of the domestic water tank, and the end detection temperature corresponding to the end device satisfy the preset condition, which realizes the conversion between the hot water production mode and the air conditioning mode according to the priority information, so as to ensure the air conditioning effect and the hot water production effect of the heat pump system, which satisfies user's demands for hot water production and air conditioning at the same time, and improves the user's comfort degree.

[0065] Further, based on the control method of the heat pump system above, the embodiments of the present disclosure further provide a heat pump system, including: a controller and a three-way valve, wherein a first end of the three-way valve is connected to a heat pump host; a second end is connected to the domestic water tank; and a third end is connected the an end device, wherein the controller includes a memory, a processor, and a computer program stored in the memory and operable in the processor, and the processor executes the computer program to realize the embodiments of the above method, which can be referred to the above embodiments, and the embodiments of the present disclosure will not be repeated in detail herein. Additionally, the specific structure of the heat pump system can be referred to the prior art, and the embodiments of the present disclosure will not be repeated in detail herein.

[0066] The heat pump system provided in the embodiments of the present disclosure has the same technical features as the control method of the heat pump system provided by the above embodiments, so that it can also solve the same technical problems and realize the same technical effects.

[0067] The embodiments of the present disclosure further provide a controller, including a processor and a memory, wherein the memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to realize the above control method of the heat pump system.

[0068] The embodiment further provides a machine-readable storage medium, and the machine-readable storage medium stores the machine-executable instructions, wherein when the machine-executable instructions are called and executed by the processor, the machine-executable instructions push the processor to realize the above control method of the heat pump system.

[0069] The control method of the heat pump system and the computer program product of the heat pump system provided by embodiments of the present disclosure include a computer readable storage medium storing program code, wherein the instructions included in the program code can be used to perform the method described in the foregoing embodiments, and the specific implementation can be referred to the method embodiments, and will not be repeated herein.

[0070] It is clearly understood by those skilled in the field that for the convenience and brevity of the description, the specific working process of the system and device described above can refer to the corresponding process in the above method embodiments, and will not be repeated herein.

[0071] Furthermore, in the description of the present disclosure, unless other expressly specifications and limitations, the terms mount, connect, and link are to be understood in a broad sense, e.g. it may be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; and it can be a direct connection, an indirect connection through an intermediate medium, or a communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood according to specific situations.

[0072] The function, if realized in the form of a software functional unit and sold or used as an individual product, it may be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure in essential, the part contributing to the prior art, or the part of the technical solutions can be embodied in the form of the software product. The computer software product is stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The foregoing storage medium includes: U disk, portable hard disk, ROM (read only-memory), RAM (random access memory), disk, disc, or other media that can store the program code.

[0073] In the description of the present disclosure, it should be noted that orientations or positional relationships indicated by terms, such as center, up, down, left, right, vertical, horizontal, inside, and outside, etc., are the orientations or positional relationships based on the drawings, which are only to facilitate the description of the present disclosure and simplify the description, and are not to indicate or imply that the device or element referred to must have a particular orientation, or be constructed and operated with a particular orientation, and therefore cannot to be understood as limitations of the present disclosure. Additionally, the terms first, second, and third, etc., are used only for descriptions, and are not to be understood as indicating or implying a relative importance.

[0074] Finally, it should be noted that the above embodiments are only specific embodiments of the present disclosure, which are used to describe the technical solutions of the present disclosure, rather than to limit it, and the scope of protection of the present disclosure is not limited to this. Although the present disclosure is described in detail with reference to the foregoing embodiments, it should not be difficult for a person skill in the art to understand that within the scope of the technology disclosed herein, any technical person familiar with the technical field can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for partial technical features therein; and these modification, change, or replacement shall not take the essence of the corresponding technical scheme out of the spirit and scope of the technical solutions of the embodiments of the present disclosure, and shall be covered by the scope of protection of the present disclosure. Therefore, the scope of protection in the present disclosure shall be governed by the scope of protection of the claims.