MULTI-HEAD SINGLE-PASS SECTIONAL COMPRESSION WATER CHILLING DEVICE

Abstract

A multi-head single-pass sectional compression water chilling device includes a combined condenser and a combined evaporator. The combined condenser is formed by sequentially connecting and combining a plurality of sectional condensers, the combined condenser is internally provided with a condenser tube bundle for use by all the sectional condensers, the combined evaporator is formed by sequentially connecting and combining a plurality of sectional evaporators, the combined evaporator is internally provided with an evaporator tube bundle for use by all the sectional evaporators, the sectional condensers and the sectional evaporators are in one-to-one correspondence, a compressor is connected between each sectional condenser and a corresponding one of the sectional evaporators, and the compressor, the sectional condenser and the corresponding sectional evaporator form a refrigeration function section.

Claims

1. A multi-head single-pass sectional compression water chilling device, comprising a combined condenser and a combined evaporator, wherein the combined condenser is formed by sequentially connecting and combining a plurality of sectional condensers, the combined condenser is internally provided with a condenser tube bundle for use by all the sectional condensers, the combined evaporator is formed by sequentially connecting and combining a plurality of sectional evaporators, the combined evaporator is internally provided with an evaporator tube bundle for use by all the sectional evaporators, the sectional condensers and the sectional evaporators are in one-to-one correspondence, a compressor is connected between each sectional condenser and a corresponding one of the sectional evaporators, and the compressor, the sectional condenser and the corresponding sectional evaporator form a refrigeration function section.

2. The multi-head single-pass sectional compression water chilling device according to claim 1, wherein the refrigeration function section further comprises a throttling device, and the throttling device is connected to the sectional condenser and the sectional evaporator.

3. The multi-head single-pass sectional compression water chilling device according to claim 1, wherein two ends of the combined condenser are respectively provided with a condenser inlet and a condenser outlet, two ends of the combined evaporator are respectively provided with an evaporator inlet and an evaporator outlet, and the condenser outlet and the evaporator inlet are located on a same side.

4. The multi-head single-pass sectional compression water chilling device according to claim 1, wherein the compressors are each selected from a centrifugal compressor, a magnetic levitation compressor and a screw compressor for use in combination.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a schematic diagram of the structure of the present invention.

DESCRIPTION OF THE EMBODIMENTS

[0016] The present invention is further illustrated by the following detailed embodiments in conjunction with the accompanying drawing, and it should be understood that these embodiments are provided only for illustrating the present invention rather than limiting the scope of the present invention, and that various equivalent modifications of the present invention by those skilled in the art after reading the present invention all fall within the scope defined by the appended claim

[0017] s of the present invention.

Embodiment 1

[0018] As shown in FIG. 1, the present embodiment provides a multi-head single-pass sectional compression water chilling device, which includes a combined condenser 7 and a combined evaporator 8. The combined condenser 7 is formed by sequentially connecting and combining four sectional condensers, and two ends of the combined condenser 7 are respectively provided with a condenser inlet 51 and a condenser outlet 52. The four sectional condensers from the condenser inlet 51 to the condenser outlet 52 are a first sectional condenser 11, a second sectional condenser 21, a third sectional condenser 31 and a fourth sectional condenser 41. The combined condenser 7 is internally provided with a condenser tube bundle 1 for joint use by the four sectional condensers. The combined evaporator 8 is formed by sequentially connecting and combining four sectional evaporators, and two ends of the combined evaporator 8 are respectively provided with an evaporator inlet 61 and an evaporator outlet 62. The four sectional evaporators from the evaporator outlet 62 to the evaporator inlet 61 are a first sectional evaporator 21, a second sectional evaporator 22, a third sectional evaporator 23 and a fourth sectional evaporator 24. The combined evaporator 8 is internally provided with an evaporator tube bundle 2 for joint use by the four sectional evaporators. The condenser outlet 52 and the evaporator inlet 61 are located on the same side.

[0019] In the present embodiment, a first compressor 31 and a first throttling device 41 are connected between the first sectional condenser 11 and the first sectional evaporator 21 through pipelines, so as to form a first refrigeration function section. A second compressor 32 and a second throttling device 42 are connected between the second sectional condenser 21 and the second sectional evaporator 22 through pipelines, so as to form a second refrigeration function section. A third compressor 33 and a third throttling device 43 are connected between the third sectional condenser 31 and the third sectional evaporator 23 through pipelines, so as to form a third refrigeration function section. A fourth compressor 34 and a fourth throttling device 44 are connected between the fourth sectional condenser 41 and the fourth sectional evaporator 24 through pipelines, so as to form a fourth refrigeration function section.

[0020] In the present embodiment, the first compressor 31, the second compressor 32, the third compressor 33 and the fourth compressor 34 are a magnetic levitation compressor, a centrifugal compressor, a centrifugal compressor and a centrifugal compressor, respectively. The magnetic levitation compressor or the centrifugal compressors can be selected to be turned on according to actual conditions, when the cold load is low and environmental conditions are favorable for the high-efficient operation of the magnetic levitation compressor, the magnetic levitation compressor is preferentially turned on to operate through an automatic control system of the water chilling device, and when the cold load is high and the environmental condition is favorable for the high-efficient operation of the centrifugal compressors, the centrifugal compressors are preferentially turned on to operate through the automatic control system of the water chilling device.

[0021] Therefore, the whole power of the compressor can be matched with the cold load under different cold load conditions, so that the refrigerating capacity can be more accurately controlled.

Embodiment 2

[0022] In the present embodiment, the water chilling device provided in embodiment 1 is applied as an example. Specifically, the lengths of the condenser tube bundle 1 and the evaporator tube bundle 2 in the water chilling device in embodiment 1, that is, the number of the refrigeration function sections, are determined according to the actual demand of the chilled water flow, and in the present embodiment, four refrigeration function sections are selected.

[0023] The water chilling device is operated in the following four conditions according to the demand of the refrigerating capacity at the terminal.

[0024] Condition 1: when the cold load is not more than 25% of the rated refrigerating capacity of the water chilling device, only a first refrigeration function section (or one of the other three refrigeration function sections) is selected for operation, cooling water enters the condenser tube bundle 1 from the condenser inlet 51 and flows out from the condenser outlet 52, and then the chilled water enters the evaporator tube bundle 2 from the evaporator inlet 61 and flows out from the evaporator outlet 62.

[0025] When the first refrigeration function section is in the process of operation, the first compressor 31 is operated in high-efficient state, and the first refrigeration function section produces corresponding refrigerating capacity, so as to meet refrigerating capacity demand at the terminal. In addition, the flow of the chilled water produced in the evaporator tube bundle 2 also can meet demand at the terminal.

[0026] Condition 2: when the cold load is more than 25% and not more than 50% of the rated refrigerating capacity of the water chilling device, a first refrigeration function section and a second refrigeration function section (two of the four refrigeration function sections) are selected for operation, the operation processes of cooling water and chilled water in the condition 2 are the same as in the condition 1, the first refrigeration function section and the second refrigeration function section operate simultaneously to produce corresponding refrigerating capacity, so as to meet refrigerating capacity demand at the terminal. In addition, the flow of the chilled water produced in the evaporator tube bundle 2 also can meet demand at the terminal.

[0027] Condition 3: when the cold load is more than 50% and not more than 75% of the rated refrigerating capacity of the water chilling device, 3 of the four refrigeration function sections are operated to produce corresponding refrigerating capacity, so as to meet refrigerating capacity demand at the terminal. In addition, the flow of the chilled water produced in the evaporator tube bundle 2 also can meet demand at the terminal.

[0028] Condition 4: when the cold load is more than 75% of the rated refrigerating capacity of the water chilling device, the four refrigeration function sections are operated simultaneously to produce corresponding refrigerating capacity, so as to meet refrigerating capacity demand at the terminal. In addition, the flow of the of the chilled water produced in the evaporator tube bundle 2 also can meet demand at the terminal.

[0029] According to above contents of the embodiment, the multi-head single-pass sectional compression water chilling device provided by the present invention not only can meet and adapt to the demand of changing refrigerating capacity, but also can keep providing sufficient chilled water flow, thus ensuring good and stable use effect of the water chilling device and bringing good user experience effect. In addition to realizing the above advantages, the water chilling device also ensures that the compressors in the operation process are always in a high-efficient state, so that the overall operation efficiency of the water chilling device is improved.