Double-temperature water cooling system

Abstract

The invention provides a double-temperature water cooling system which can provide cooling water with different temperatures for water cooling equipment and air cooling equipment at the same time, and comprises a high-temperature system evaporator, a second cooling system evaporator, a third cooling system evaporator, a fourth cooling system evaporator, a fourth cooling system evaporator, a fifth cooling system evaporator and a sixth cooling system evaporator, the high-temperature system evaporator comprises a first refrigerant flow path and a second cooling water flow path which can conduct heat exchange, and the first refrigerant flow path is connected into a refrigerant circulation loop of first refrigeration equipment; the low-temperature system evaporator comprises a second refrigerant flow path and a second cooling water flow path which can perform heat exchange, and the second refrigerant flow path is connected into the refrigerant circulation loop of the second refrigeration equipment; a water outlet of the water cooling equipment is connected with a water inlet of the first cooling water flow path through a pipeline, and a water outlet of the first cooling water flow path is connected with a water inlet of the water cooling equipment through a pipeline; a water outlet of the air cooling equipment is connected with a water inlet of the first cooling water flow path through a pipeline, a water outlet of the first cooling water flow path is connected with a water inlet of the second cooling water flow path through a pipeline, and a water outlet of the second cooling water flow path is connected with a water inlet of the air cooling equipment through a pipeline.

Description

Technical Field

[0001] The present application relates to the field of refrigeration equipment, and in particular to a dual-temperature cold water system. Background Art

[0002] For air-cooled chillers used in data centers, the end products include air cooling (such as wind walls) and liquid cooling (such as CDU). Since the water temperatures required by air-cooled equipment and liquid-cooled equipment are different, wind walls require cold water with a lower temperature, while CDU uses cold water with a higher temperature.

[0003] In order to meet the two different water temperatures, one method in the prior art is to use two cold sources, high-temperature water is provided by a cooling tower, and low-temperature water is provided by a chiller, such as Figure 6 This method is relatively complex, requiring two sets of piping systems and cold sources, and the initial investment is also relatively large.

[0004] Another method in the prior art is to connect the chiller, wind wall and CDU in series. Figure 7 As shown in the figure, this method only requires one cold source, the chiller. The low-temperature water from the chiller first passes through the wind wall, and the medium-temperature water from the wind wall is cooled by the CDU. The CDU outlet water returns to the chiller inlet to complete the cycle. However, its overall efficiency is lower than that of the solution using two cold sources. Summary of the invention

[0005] In view of this, the present application provides a dual-temperature cold water system with higher efficiency, specifically including: a high-temperature system evaporator, including a first refrigerant flow path and a first cooling water flow path capable of heat exchange, the first refrigerant flow path being connected to the refrigerant circulation circuit of the first refrigeration equipment; a low-temperature system evaporator, including a second refrigerant flow path and a second cooling water flow path capable of heat exchange, the second refrigerant flow path being connected to the refrigerant circulation circuit of the second refrigeration equipment; a water outlet of the water cooling equipment is connected to the water inlet of the first cooling water flow path through a pipeline, the water outlet of the first cooling water flow path is connected to the water inlet of the water cooling equipment through a first pipeline, and a regulating valve is provided on the first pipeline; a water outlet of the air cooling equipment is connected to the water inlet of the first cooling water flow path through a pipeline, the water outlet of the first cooling water flow path is connected to the water inlet of the second cooling water flow path through a pipeline, and the water outlet of the second cooling water flow path is connected to the water inlet of the air cooling equipment through a pipeline.

[0006] By adopting the above specific structure, the flow rate of water in the first pipeline can be controlled by controlling the regulating valve, thereby indirectly controlling the flow rate of refrigerant in the second pipeline. In this way, the refrigeration capacity of the high-temperature system evaporator and the low-temperature system evaporator can be controlled. By allocating the refrigeration capacity, the overall efficiency of the dual-temperature cold water system can be improved while ensuring sufficient cold water supply.

[0007] As a possible implementation, the first refrigeration equipment includes: a first compressor, the outlet of the first refrigerant flow path is connected to the inlet of the first compressor through a pipeline; a first condenser, the outlet of the first compressor is connected to the inlet of the first condenser through a pipeline; a first expansion valve, the outlet of the first condenser is connected to the inlet of the first expansion valve through a pipeline, and the outlet of the first expansion valve is connected to the inlet of the first refrigerant flow path through a pipeline.

[0008] As a possible implementation, the first condenser includes a plurality of first condensation tubes, and the plurality of first condensation tubes are connected in parallel on a connecting pipeline between the first compressor and the first expansion valve.

[0009] As a possible implementation manner, there are multiple first condensers, and the multiple first condensers are connected in parallel on the connecting pipeline between the first compressor and the first expansion valve.

[0010] As a possible implementation, the second refrigeration equipment includes: a second compressor, the outlet of the second refrigerant flow path is connected to the inlet of the second compressor through a pipeline; a second condenser, the outlet of the second compressor is connected to the inlet of the second condenser through a pipeline; a second expansion valve, the outlet of the second condenser is connected to the inlet of the second expansion valve through a pipeline, and the outlet of the second expansion valve is connected to the inlet of the second refrigerant flow path through a pipeline.

[0011] As a possible implementation, the second condenser includes a plurality of second condensing tubes, and the plurality of second condensing tubes are connected in parallel on a connecting pipeline between the second compressor and the second expansion valve.

[0012] As a possible implementation, there are multiple second condensers, and the multiple second condensers are connected in parallel on the connecting pipeline between the second compressor and the second expansion valve.

[0013] As a possible implementation, a water pump is provided on a pipeline connecting the water outlet of the water cooling device and the air cooling device with the water inlet of the first cooling water flow path.

[0014] As a possible implementation, a three-way valve is provided at the water outlet of the first cooling water flow path, and the three-way valve includes a first port, a second port and a third port, the first port is connected to the water outlet of the first cooling water flow path, the second port is connected to the water inlet of the regulating valve through a pipeline, and the third port is connected to the water inlet of the second cooling water flow path through a pipeline.

[0015] As a possible implementation manner, the flow rate in the first pipeline is greater than the flow rate in the second pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The various technical features of the present application and the relationship between them are further explained below with reference to the accompanying drawings. The accompanying drawings are exemplary, and some technical features are not shown in actual proportion. In addition, some drawings may omit technical features that are commonly used in the technical field to which the present application belongs and are not essential for understanding and implementing the present application, or additional technical features that are not essential for understanding and implementing the present application may be shown. In other words, the combination of the various technical features shown in the accompanying drawings is not used to limit the present application. In addition, throughout the present application, the same figure numbers refer to the same content. The specific description of the drawings is as follows:

[0017] Figure 1 This is a schematic diagram of a dual-temperature cold water system according to the first embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of a dual-temperature cold water system according to a second embodiment of the present application;

[0019] Figure 3 This is a performance comparison analysis table of the dual-temperature cold water system related to the first embodiment and the second embodiment of the present application;

[0020] Figure 4 A bar chart showing the cooling capacity and energy efficiency of a dual-temperature chilled water system according to the first embodiment of the present application;

[0021] Figure 5 A bar chart showing the cooling capacity and energy efficiency of a dual-temperature chilled water system according to the second embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of a dual-cold source cold water system in the prior art;

[0023] Figure 7 It is a schematic diagram of a series cold water system in the prior art.

[0024] Explanation of the accompanying drawings: 1-water cooling equipment; 2-air cooling equipment; 10-high temperature system evaporator; 20-low temperature system evaporator; 30-first pipeline; 31-regulating valve; 40-second pipeline; 50-water pump; 100-first refrigeration equipment; 110-first compressor; 120-first condenser; 121-first condensing tube; 130-first expansion valve; 200-second refrigeration equipment; 210-second compressor; 220-second condenser; 221-second condensing tube; 230-second expansion valve. DETAILED DESCRIPTION

[0025] Below, the specific implementation methods of the present application are described in detail with reference to the accompanying drawings.

[0026] The present application provides a dual-temperature cold water system, which can simultaneously provide cooling water of different temperatures for a water cooling device 1 and an air cooling device 2. The dual-temperature cold water system involved in the embodiment of the present application includes a high-temperature system evaporator 10 and a low-temperature system evaporator 20.

[0027] like Figure 1 As shown, in the first embodiment of the dual-temperature cold water system of the present application, the high-temperature system evaporator 10 includes a first refrigerant flow path (not shown) and a first cooling water flow path (not shown). The first refrigerant flow path is connected to the refrigerant circulation circuit of the first refrigeration equipment 100. The first refrigerant flow path performs heat exchange with the first cold water flow path. The low-temperature system evaporator 20 includes a second refrigerant flow path (not shown) and a second cooling water flow path (not shown), and the second refrigerant flow path is connected to the refrigerant circulation circuit of the second refrigeration equipment 200. The second refrigerant flow path performs heat exchange with the second cold water flow path.

[0028] Among them, Figure 1 As shown, the water outlet of the water cooling device 1 is connected to the water inlet of the first cooling water flow path through a pipeline. The water outlet of the first cooling water flow path is connected to the water inlet of the water cooling device 1 through a first pipeline 30, and a regulating valve 31 is provided on the first pipeline 30. The water outlet of the air cooling device 2 is connected to the water inlet of the first cooling water flow path through a pipeline. The water outlet of the first cooling water flow path is connected to the water inlet of the second cooling water flow path through a pipeline. The water outlet of the second cooling water flow path is connected to the water inlet of the air cooling device 2 through a second pipeline 40.

[0029] Among them, Figure 1 As shown, the first refrigeration device 100 includes a first compressor 110, and the outlet of the first refrigerant flow path is connected to the inlet of the first compressor 110 through a pipeline; a first condenser 120, and the outlet of the first compressor 110 is connected to the inlet of the first condenser 120 through a pipeline; a first expansion valve 130, and the outlet of the first condenser 120 is connected to the inlet of the first expansion valve 130 through a pipeline, and the outlet of the first expansion valve 130 is connected to the inlet of the first refrigerant flow path through a pipeline.

[0030] In this embodiment, the first condenser 120 includes a plurality of first condensing pipes 121, and the plurality of first condensing pipes 121 are connected in parallel on the connecting pipe between the first compressor 110 and the first expansion valve 130. There are a plurality of first condensers 120, and the plurality of first condensers 120 are connected in parallel on the connecting pipe between the first compressor 110 and the first expansion valve 130.

[0031] Among them, Figure 1As shown, the second refrigeration equipment 200 includes a second compressor 210, and the water outlet of the second refrigerant flow path is connected to the water inlet of the second compressor 210 through a pipeline; a second condenser 220, and the water outlet of the second compressor 210 is connected to the water inlet of the second condenser 220 through a pipeline; a second expansion valve 230, and the water outlet of the second condenser 220 is connected to the water inlet of the second expansion valve 230 through a pipeline, and the water outlet of the second expansion valve 230 is connected to the water inlet of the second refrigerant flow path through a pipeline.

[0032] In this embodiment, the second condenser 220 includes a plurality of second condensing pipes 221, and the plurality of second condensing pipes 221 are connected in parallel on the connecting pipe between the second compressor 210 and the second expansion valve 230. There are a plurality of second condensers 220, and the plurality of second condensers 220 are connected in parallel on the connecting pipe between the second compressor 210 and the second expansion valve 230.

[0033] Among them, Figure 1 As shown, a water pump 50 is provided on the pipeline connecting the water outlets of the water cooling device 1 and the air cooling device 2 with the water inlet of the first cooling water flow path.

[0034] In this embodiment, a three-way valve is provided at the outlet of the first cooling water flow path, and the three-way valve includes a first port, a second port and a third port. The first port is connected to the outlet of the first cooling water flow path, the second port is connected to the water inlet of the regulating valve 31 through a pipeline, and the third port is connected to the water inlet of the second cooling water flow path through a pipeline.

[0035] In addition, if Figure 2 As shown, in the second embodiment of the dual-temperature cold water system of the present application, the high-temperature system evaporator 10 includes a first refrigerant flow path (not shown) and a first cooling water flow path (not shown). The first refrigerant flow path is connected to the refrigerant circulation circuit of the first refrigeration equipment 100. The first refrigerant flow path performs heat exchange with the first cold water flow path. The low-temperature system evaporator 20 includes a second refrigerant flow path (not shown) and a second cooling water flow path (not shown), and the second refrigerant flow path is connected to the refrigerant circulation circuit of the second refrigeration equipment 200. The second refrigerant flow path performs heat exchange with the second cold water flow path.

[0036] Among them, Figure 2 As shown, the water outlet of the water cooling device 1 is connected to the water inlet of the first cooling water flow path through a pipeline. The water outlet of the first cooling water flow path is connected to the water inlet of the second cooling water flow path through a pipeline. The water outlet of the second cooling water flow path is connected to the water inlet of the air cooling device 2 through a pipeline. The water outlet of the air cooling device 2 is connected to the water inlet of the water cooling device 1 through a pipeline.

[0037] Among them, Figure 2As shown, the first refrigeration device 100 includes a first compressor 110, and the outlet of the first refrigerant flow path is connected to the inlet of the first compressor 110 through a pipeline; a first condenser 120, and the outlet of the first compressor 110 is connected to the inlet of the first condenser 120 through a pipeline; a first expansion valve 130, and the outlet of the first condenser 120 is connected to the inlet of the first expansion valve 130 through a pipeline, and the outlet of the first expansion valve 130 is connected to the inlet of the first refrigerant flow path through a pipeline.

[0038] In this embodiment, the first condenser 120 includes a plurality of first condensing pipes 121, and the plurality of first condensing pipes 121 are connected in parallel on the connecting pipe between the first compressor 110 and the first expansion valve 130. There are a plurality of first condensers 120, and the plurality of first condensers 120 are connected in parallel on the connecting pipe between the first compressor 110 and the first expansion valve 130.

[0039] Among them, Figure 2 As shown, the second refrigeration equipment 200 includes a second compressor 210, and the outlet of the second refrigerant flow path is connected to the inlet of the second compressor 210 through a pipeline; a second condenser 220, and the outlet of the second compressor 210 is connected to the inlet of the second condenser 220 through a pipeline; a second expansion valve 230, and the outlet of the second condenser 220 is connected to the inlet of the second expansion valve 230 through a pipeline, and the outlet of the second expansion valve 230 is connected to the inlet of the second refrigerant flow path through a pipeline.

[0040] In this embodiment, the second condenser 220 includes a plurality of second condensing pipes 221, and the plurality of second condensing pipes 221 are connected in parallel on the connecting pipe between the second compressor 210 and the second expansion valve 230. There are a plurality of second condensers 220, and the plurality of second condensers 220 are connected in parallel on the connecting pipe between the second compressor 210 and the second expansion valve 230.

[0041] Among them, Figure 2 As shown, a water pump 50 is provided on the pipeline connecting the water outlet of the water cooling device 1 and the water inlet of the first cooling water flow path.

[0042] Compared with the first embodiment described above, the second embodiment differs in that: in the first embodiment, the water cooling device 1 and the air cooling device 2 are arranged in parallel in the water circuit; in the second embodiment, the water cooling device 1 and the air cooling device 2 are arranged in series in the water circuit. In the first embodiment, the flow rate of the refrigerant in the first pipeline 30 can be controlled by controlling the regulating valve 31. And then the flow rate of the refrigerant in the second pipeline 40 is indirectly controlled. In this way, the refrigeration capacity of the high-temperature system evaporator 10 and the low-temperature system evaporator 20 can be controlled. The refrigeration efficiency of the high-temperature system evaporator 10 (high-temperature system) is higher than the refrigeration efficiency of the high-temperature system evaporator 10 (low-temperature system). Therefore, increasing the refrigeration capacity of the high-temperature system can indirectly improve the efficiency of the whole machine.

[0043] Preferably, if Figure 3 , 4 , 5, in the first embodiment, the refrigeration capacity of the high temperature system is 763, the refrigeration capacity of the low temperature system is 237, and the efficiency is 5.99; in the second embodiment, the refrigeration capacity of the high temperature system and the refrigeration capacity of the low temperature system are both 500, and the efficiency is 5.36. Under this refrigeration capacity, the efficiency of the first embodiment is 12% higher than that of the second embodiment. Therefore, the first embodiment is a better embodiment.

[0044] In summary, the dual-temperature cold water system involved in the present application includes a regulating valve 31, which can realize the distribution of cooling capacity between the high-temperature system and the low-temperature system, thereby improving the efficiency of the whole machine.

[0045] The term "comprising" used throughout the present application should not be interpreted as being limited to what is listed thereafter; it does not exclude other structural elements or steps.

[0046] It can be understood that those skilled in the art can combine the features mentioned in one or more embodiments mentioned in the entire application with the features in other embodiments in any appropriate manner to implement the application.

[0047] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the technical concept of the present application, all of which belong to the protection scope of the present application.

Claims

1. A dual-temperature cold water system, characterized in that: It can provide cooling water of different temperatures for water-cooled equipment and air-cooled equipment at the same time, including: A high temperature system evaporator, comprising a first refrigerant flow path capable of heat exchange and a first cooling water flow path, wherein the first refrigerant flow path is connected to a refrigerant circulation circuit of a first refrigeration device; A low temperature system evaporator, comprising a second refrigerant flow path capable of heat exchange and a second cooling water flow path, wherein the second refrigerant flow path is connected to a refrigerant circulation circuit of a second refrigeration device; The water outlet of the water cooling device is connected to the water inlet of the first cooling water flow path through a pipeline, and the water outlet of the first cooling water flow path is connected to the water inlet of the water cooling device through a first pipeline, and a regulating valve is provided on the first pipeline; The water outlet of the air cooling device is connected to the water inlet of the first cooling water flow path through a pipeline, the water outlet of the first cooling water flow path is connected to the water inlet of the second cooling water flow path through a pipeline, and the water outlet of the second cooling water flow path is connected to the water inlet of the air cooling device through a second pipeline.

2. The dual-temperature cold water system according to claim 1, characterized in that: The first refrigeration equipment comprises: a first compressor, wherein an outlet of the first refrigerant flow path is connected to an inlet of the first compressor via a pipeline; a first condenser, wherein an outlet of the first compressor is connected to an inlet of the first condenser via a pipeline; a first expansion valve, wherein the outlet of the first condenser is connected to the inlet of the first expansion valve through a pipeline, and the outlet of the first expansion valve is connected to the inlet of the first refrigerant flow path through a pipeline; The first condenser includes a plurality of first condensation tubes, and the plurality of first condensation tubes are connected in parallel on the connecting pipeline between the first compressor and the first expansion valve. There are a plurality of first condensers, and the plurality of first condensers are connected in parallel on the connecting pipeline between the first compressor and the first expansion valve.

3. The dual-temperature cold water system according to claim 1, characterized in that: The second refrigeration equipment comprises: a second compressor, wherein the outlet of the second refrigerant flow path is connected to the inlet of the second compressor via a pipeline; a second condenser, wherein the outlet of the second compressor is connected to the inlet of the second condenser via a pipeline; a second expansion valve, wherein the outlet of the second condenser is connected to the inlet of the second expansion valve via a pipeline, and the outlet of the second expansion valve is connected to the inlet of the second refrigerant flow path via a pipeline; The second condenser includes a plurality of second condensation tubes, which are connected in parallel on the connecting pipeline between the second compressor and the second expansion valve. There are a plurality of second condensers, which are connected in parallel on the connecting pipeline between the second compressor and the second expansion valve.

4. The dual-temperature cold water system according to claim 1, characterized in that: A water pump is provided on the pipeline connecting the water outlet of the water cooling device and the air cooling device with the water inlet of the first cooling water flow path.

5. The dual-temperature cold water system according to claim 1, characterized in that: A three-way valve is provided at the water outlet of the first cooling water flow path, and the three-way valve includes a first port, a second port and a third port. The first port is connected to the water outlet of the first cooling water flow path, the second port is connected to the water inlet of the regulating valve through a pipeline, and the third port is connected to the water inlet of the second cooling water flow path through a pipeline.

6. A dual-temperature cold water system, characterized in that: It can provide cooling water of different temperatures for water-cooled equipment and air-cooled equipment at the same time, including: A high temperature system evaporator, comprising a first refrigerant flow path capable of heat exchange and a first cooling water flow path, wherein the first refrigerant flow path is connected to a refrigerant circulation circuit of a first refrigeration device; A low temperature system evaporator, comprising a second refrigerant flow path capable of heat exchange and a second cooling water flow path, wherein the second refrigerant flow path is connected to a refrigerant circulation circuit of a second refrigeration device; The water outlet of the water cooling device is connected to the water inlet of the first cooling water flow path through a pipeline, the water outlet of the first cooling water flow path is connected to the water inlet of the second cooling water flow path through a pipeline, the water outlet of the second cooling water flow path is connected to the water inlet of the air cooling device through a pipeline, and the water outlet of the air cooling device is connected to the water inlet of the water cooling device through a pipeline.

7. The dual-temperature cold water system according to claim 6, characterized in that: The first refrigeration equipment comprises: a first compressor, wherein an outlet of the first refrigerant flow path is connected to an inlet of the first compressor via a pipeline; a first condenser, wherein an outlet of the first compressor is connected to an inlet of the first condenser via a pipeline; a first expansion valve, wherein the outlet of the first condenser is connected to the inlet of the first expansion valve through a pipeline, and the outlet of the first expansion valve is connected to the inlet of the first refrigerant flow path through a pipeline; The first condenser includes a plurality of first condensation tubes, and the plurality of first condensation tubes are connected in parallel on the connecting pipeline between the first compressor and the first expansion valve. There are a plurality of first condensers, and the plurality of first condensers are connected in parallel on the connecting pipeline between the first compressor and the first expansion valve.

8. The dual-temperature cold water system according to claim 6, characterized in that: The second refrigeration equipment comprises: a second compressor, wherein the outlet of the second refrigerant flow path is connected to the inlet of the second compressor via a pipeline; a second condenser, wherein the outlet of the second compressor is connected to the inlet of the second condenser via a pipeline; a second expansion valve, wherein the outlet of the second condenser is connected to the inlet of the second expansion valve via a pipeline, and the outlet of the second expansion valve is connected to the inlet of the second refrigerant flow path via a pipeline; The second condenser includes a plurality of second condensation tubes, which are connected in parallel on the connecting pipeline between the second compressor and the second expansion valve. There are a plurality of second condensers, which are connected in parallel on the connecting pipeline between the second compressor and the second expansion valve.

9. The dual-temperature cold water system according to claim 6, characterized in that: A water pump is provided on the pipeline connecting the water outlet of the water cooling device and the water inlet of the first cooling water flow path.

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