Refrigerating device and data center

Abstract

The utility model provides a refrigeration device and a data center, relates to the technical field of refrigeration equipment, and is used for solving the problem of high refrigeration energy consumption, the refrigeration device comprises an air wall, a cooling system, a control system and a control system, the air wall comprises an air inlet side and an air outlet side, and the air outlet side is constructed to face to-be-cooled equipment; the first cooling unit comprises a first heat exchanger located in the ventilation wall, and the first heat exchanger communicates with a cooling source and is used for conducting and exchanging heat with a cooling medium in the cooling source; the second cooling unit comprises a cooling circulation loop, the cooling circulation loop comprises a second heat exchanger, refrigerants circulate in the cooling circulation loop, the second heat exchanger is used for conducting heat exchange through phase change of the refrigerants, and the first heat exchanger and the second heat exchanger are sequentially arranged in the direction from the air inlet side to the air outlet side; and the first cooling unit and the second cooling unit can be selectively opened and closed so as to cool airflow entering from the air inlet side and discharge the cooled airflow from the air outlet side. The refrigerating efficiency is improved, and meanwhile the refrigerating energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigeration device and a data center. Background Art

[0002] With the rapid development of the Internet and artificial intelligence technologies, the construction scale of data centers is getting larger and larger, and the requirements for energy saving are getting higher and higher. A large number of server cabinets will be stored in large data centers. When the servers are kept in working state for a long time, a lot of heat will be generated. In order to ensure the normal operation of the servers, the server cabinets need to be cooled. Usually, the refrigeration system of the data center generally uses refrigeration air conditioners such as fluorine refrigerants for cooling. However, the use of refrigeration air conditioners for cooling consumes a lot of power and energy, resulting in high energy usage efficiency (Power Usage Effectiveness, referred to as PUE). Utility Model Content

[0003] The present application provides a refrigeration device and a data center, which can effectively reduce refrigeration energy consumption and PUE while improving refrigeration efficiency to meet PUE control indicators that are tightened year by year.

[0004] A first aspect of the present application provides a refrigeration device, comprising:

[0005] A wind wall, comprising an air inlet side and an air outlet side, wherein the air outlet side is configured to face the equipment to be cooled;

[0006] A first cooling unit, comprising a first heat exchanger located in the wind wall, the first heat exchanger being connected to a cooling source and configured to conduct heat exchange with a cooling medium in the cooling source;

[0007] a second cooling unit, comprising a cooling circulation loop, the cooling circulation loop comprising a second heat exchanger, a refrigerant flowing through the cooling circulation loop, the second heat exchanger being configured to perform heat exchange through a phase change of the refrigerant, the first heat exchanger and the second heat exchanger being sequentially arranged from the air inlet side to the air outlet side;

[0008] The first cooling unit and the second cooling unit can be selectively opened and closed to cool the airflow entering through the air inlet side, and discharge the cooled airflow through the air outlet side.

[0009] The refrigeration device provided in the embodiment of the present application is provided with a first cooling unit and a second cooling unit in the wind wall, the first cooling unit includes a first heat exchanger located in the wind wall, the first heat exchanger is connected to the cooling source, and the first heat exchanger is used for conducting heat exchange with the cooling medium in the cooling source; the second cooling unit includes a cooling circulation loop, the cooling circulation loop includes a second heat exchanger, a refrigerant flows through the cooling circulation loop, the second heat exchanger performs heat exchange through the phase change of the refrigerant, and the first heat exchanger in the first cooling unit and the second heat exchanger in the second cooling unit are sequentially arranged along the direction from the air inlet side to the air outlet side of the wind wall. In this way, the first cooling unit and the second cooling unit can be selectively opened and closed according to the temperature of the cooling medium provided by the cooling source, so as to shorten the heat exchange link, improve the refrigeration efficiency, effectively reduce the refrigeration energy consumption, and thus reduce the PUE.

[0010] In some possible implementations, the air inlet side and the air outlet side are arranged opposite to each other and spaced apart.

[0011] Such an arrangement improves the fluidity of the airflow.

[0012] In some possible implementations, the cooling circulation loop further includes a third heat exchanger, a compressor, and an electronic expansion valve, and the compressor, the third heat exchanger, the electronic expansion valve, and the second heat exchanger are cyclically connected in sequence.

[0013] Such an arrangement can cause the refrigerant circulating in the cooling cycle to undergo a phase change and exchange heat with the airflow passing through the second heat exchanger, thereby achieving the purpose of cooling and refrigeration.

[0014] In some possible implementations, the third heat exchanger includes a first channel and a second channel that are thermally connected, the first channel is connected to the cooling circulation loop for the refrigerant to circulate, and the second channel is connected to the cooling source.

[0015] With this arrangement, the cooling source can provide cooling medium to the second channel, so that the cooling medium in the second channel exchanges heat with the first channel through the second channel to reduce the refrigerant temperature in the first channel, thereby fully utilizing the refrigerant phase change heat transfer capacity and effectively reducing electricity consumption.

[0016] In some possible implementations, the second heat exchanger is an evaporator, and the third heat exchanger is a brazed plate heat exchanger.

[0017] Such a setting can reduce equipment resistance and improve equipment energy efficiency.

[0018] In some possible implementations, the cooling source includes a water supply end and a water return end, and the first heat exchanger and the second channel are both connected between the water supply end and the water return end.

[0019] With such an arrangement, natural cooling is performed by using the cooling water flowing in the first heat exchanger and the second channel, thereby reducing power consumption and saving power costs.

[0020] In some possible implementations, the system further includes: a control unit, the control unit including a first control valve and a second control valve, the first control valve being arranged between the cooling source and the first heat exchanger; the second control valve being arranged between the cooling source and the second channel.

[0021] With such an arrangement, the openings of the first control valve and the second control valve can be controlled respectively to accurately control the flow of the cooling medium passing through the cooling source and the first heat exchanger and the second channel according to actual needs, thereby improving the utilization rate of the cooling medium, making the refrigeration device operate at a better energy efficiency point, and reducing electricity consumption.

[0022] In some possible implementations, when the temperature of the cooling medium provided by the cooling source is greater than a first preset temperature, the first control valve is closed, the compressor is operated, and the second control valve is opened;

[0023] When the temperature of the cooling medium provided by the cooling source is less than or equal to the first preset temperature and greater than the second preset temperature, the compressor operates, and the first control valve and the second control valve are both opened;

[0024] When the temperature of the cooling medium provided by the cooling source is less than or equal to the second preset temperature, the first control valve is opened, and the compressor and the second control valve are closed.

[0025] With such an arrangement, the operation of the first cooling unit and the second cooling unit can be accurately controlled according to the temperature of the cooling medium, thereby improving the refrigeration efficiency and reducing the refrigeration energy consumption.

[0026] In some possible implementations, the system further includes: a temperature sensor, wherein the temperature sensor is electrically connected to the first control valve and the second control valve, respectively, and the temperature sensor is configured to detect the temperature of the cooling medium in the cooling source.

[0027] With such an arrangement, the temperature of the cooling medium can be accurately known, and the opening and closing of the first control valve and the second control valve can be determined according to the detected temperature of the cooling medium.

[0028] In some possible embodiments, the control unit also includes a controller, which is electrically connected to the temperature sensor, the first control valve, the second control valve and the compressor, respectively, and the controller is configured to control the opening and closing of the first control valve, the second control valve and the compressor according to the temperature of the cooling medium in the cooling source detected by the temperature sensor.

[0029] Such a setting improves the intelligence of the refrigeration device and the accuracy of the operation mode, thereby improving the user experience.

[0030] In some possible implementations, at least one of the first heat exchanger and the second heat exchanger is a coil.

[0031] Such a setting has a simple structure and small running resistance.

[0032] In some optional embodiments, the first heat exchanger and the second heat exchanger are both coils.

[0033] In some possible implementations, the coil includes a connecting pipe and a plurality of sub-coils, the plurality of sub-coils are parallel to each other and extend in a direction perpendicular to the wind wall, and the connecting pipe is configured to connect two adjacent sub-coils.

[0034] Such an arrangement increases the heat exchange area of ​​the coil, reduces wind resistance, and thus improves the energy efficiency of the refrigeration device.

[0035] In some possible implementations, the air inlet side has an air inlet, and a projection area of ​​the coil on the air inlet side covers a projection area of ​​the air inlet on the air inlet side.

[0036] Such an arrangement increases the heat exchange area, thereby improving the refrigeration efficiency.

[0037] In some possible implementations, at least one fan is disposed between the air inlet side of the wind wall and the first heat exchanger.

[0038] Such an arrangement can increase the air flow on the air inlet side, improve the fluidity of the air flow, and thus improve the refrigeration efficiency.

[0039] In some possible implementations, a filter is provided on the air inlet side of the wind wall.

[0040] Such an arrangement can prevent impurities such as dust particles outside the wind wall from entering the refrigeration device, thereby extending the service life of the refrigeration device and improving the performance of the refrigeration device.

[0041] A second aspect of an embodiment of the present application provides a data center, comprising a refrigeration device as provided in the above embodiment.

[0042] The data center provided in the embodiment of the present application has the same beneficial effects as the refrigeration device provided in the above embodiment, which will not be described in detail here.

[0043] In addition to the technical problems solved by the embodiments of the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the refrigeration device and data center provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A schematic diagram of a refrigeration device provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of the appearance of a structure of a refrigeration device provided in an embodiment of the present application;

[0047] Figure 3 A side view of the internal structure of a refrigeration device provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of the internal structure of the refrigeration device provided in an embodiment of the present application from another perspective;

[0049] Figure 5 A schematic diagram of the structure of the air outlet side of the refrigeration device provided in an embodiment of the present application.

[0050] Description of reference numerals:

[0051] 100-refrigeration device; 110-wind wall; 111-air inlet side; 112-air outlet side;

[0052] 120 - first heat exchanger; 130 - second heat exchanger; 140 - third heat exchanger;

[0053] 141 - first channel; 142 - second channel; 150 - compressor; 160 - electronic expansion valve;

[0054] 170-water supply end; 180-water return end;

[0055] 190-first control valve; 200-second control valve; 210-coil; 211-connecting pipe;

[0056] 212-sub coil; 220-fan; 230-filter. DETAILED DESCRIPTION

[0057] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0058] Direct Expansion (DX) refers to a refrigeration unit with its own compressor. In its refrigeration system, the liquid refrigerant directly evaporates (expands) in its evaporator to absorb heat from the air outside the evaporator (indoor air) to achieve cooling.

[0059] Water-cooled DX refers to a direct expansion air conditioner that uses water as a cooling source and removes condensation heat through circulating water.

[0060] In order to facilitate understanding of the refrigeration device provided in the embodiment of the present application, its application scenario is first introduced below.

[0061] The cooling device provided in the embodiment of the present application can be used in fields such as data centers to dissipate heat from server rooms in data centers, etc., to ensure the normal operation of the data center.

[0062] With the rapid development of the Internet and artificial intelligence technologies, the construction scale of data centers is getting larger and larger, and the requirements for energy saving are getting higher and higher. A large number of server cabinets will be stored in large data centers. When the servers are kept in working state for a long time, a lot of heat will be generated. In order to ensure the normal operation of the servers, the server cabinets need to be cooled. Usually, the refrigeration system of the data center generally uses refrigeration and air conditioning such as fluorine refrigerants for refrigeration. However, the use of refrigeration and air conditioning for refrigeration consumes a lot of electricity. At present, the electricity consumption of data centers has accounted for about 3% of the total electricity consumption of the whole society, resulting in high energy usage efficiency (Power Usage Effectiveness, referred to as PUE). Therefore, more and more stringent energy consumption standards have been introduced for data centers, such as requiring data centers with energy consumption exceeding 30,000 tons of standard coal to reduce the PUE to below 1.15.

[0063] In order to reduce energy consumption, in some embodiments, the data center uses liquid cooling for cooling, for example, cold plate liquid cooling for cooling, but cold plate liquid cooling can only solve the heat dissipation of chips in the data center.

[0064] To this end, an embodiment of the present application provides a refrigeration device that can improve refrigeration efficiency, is suitable for high power density computer rooms, reduces power consumption, reduces PUE, and meets PUE control indicators that are tightened year by year.

[0065] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Please refer to Figures 1 to 5 As shown, the embodiment of the present application provides a refrigeration device 100, including a wind wall 110, the wind wall 110 includes an air inlet side 111 and an air outlet side 112, illustratively, the air inlet side 111 has an air inlet, the air outlet side 112 has an air outlet, and the air outlet side 112 is configured to face the equipment to be cooled, that is, the air outlet faces the equipment to be cooled, and the equipment to be cooled is, for example, IT equipment in a data center. It can be understood that the heat in the data center can enter the wind wall 110 through the air inlet of the air inlet side 111, and after being cooled by the refrigeration device 100, it can be discharged to the data center through the air outlet of the air outlet side 112 to cool the IT equipment in the data center.

[0067] In some embodiments, the refrigeration device 100 also includes a first cooling unit, which includes a first heat exchanger 120 located in the wind wall 110. The first heat exchanger 120 is connected to a cooling source, which includes but is not limited to a dry cooler or a cooling tower. The cooling source can provide a cooling medium to the first heat exchanger 120, so that the first heat exchanger 120 and the cooling medium provided by the cooling source conduct heat exchange. When the heat dissipated by the IT equipment flows through the first heat exchanger 120 through the air inlet side 111, the cooling medium exchanges heat with the airflow entering the wind wall 110 through the first heat exchanger 120 to reduce the temperature of the airflow entering the wind wall 110. The cooled airflow is then discharged through the air outlet side 112 to cool the IT equipment in the data center.

[0068] Exemplarily, the cooling medium is, for example, cooling water in a container such as a dry cooler or a cooling tower disposed outside the wind wall 110. The cooling water circulates in the first heat exchanger 120 and exchanges heat with the air flow passing through the first heat exchanger 120, thereby achieving the purpose of cooling without consuming too much electricity, thereby reducing the energy consumption of the refrigeration device 100.

[0069] In some embodiments, the refrigeration device 100 also includes a second cooling unit, the second cooling unit includes a cooling cycle loop, the cooling cycle loop includes a second heat exchanger 130, and a refrigerant flows through the cooling cycle loop. For example, the refrigerant is a refrigerant such as fluorine. The second heat exchanger 130 is constructed to exchange heat through the phase change of the refrigerant, that is, the heat of the data center enters the wind wall 110 through the air inlet side 111. When the second cooling unit starts to operate, the liquid refrigerant circulating in the second heat exchanger 130 absorbs the heat of the air flow entering the air cavity to vaporize into a gaseous refrigerant. In this way, the refrigerant can achieve the purpose of cooling the air flow entering the wind wall 110 by absorbing heat and undergoing a phase change. Afterwards, the cooled air flow is discharged through the air outlet side 112 to cool the IT equipment in the data center.

[0070] Among them, the first heat exchanger 120 and the second heat exchanger 130 are arranged in sequence from the air inlet side 111 to the air outlet side 112; it can be understood that the cooling medium provided by the cooling source absorbs the heat of the air flow entering the wind wall 110 when flowing through the first heat exchanger 120, and the refrigerant is also used to absorb the heat of the air flow entering the wind wall 110 when flowing through the second heat exchanger 130. In this way, the first cooling unit and the second cooling unit can be selectively opened and closed according to actual working conditions, so that when the heat generated by the IT equipment in the data center flows through the first heat exchanger 120 and the second heat exchanger 130, at least one of the first heat exchanger 120 and the second heat exchanger 130 can work to absorb the heat of the IT equipment, thereby achieving the purpose of cooling the IT equipment.

[0071] In some embodiments, at least one of the first heat exchanger 120 and the second heat exchanger 130 is a coil 210. For example, the first heat exchanger 120 is a coil 210; or, the second heat exchanger 130 is a coil 210; or, both the first heat exchanger 120 and the second heat exchanger 130 are coils 210. By setting at least one of the first heat exchanger 120 and the second heat exchanger 130 as a coil 210, the heat exchange area can be increased while reducing the equipment resistance, thereby improving the heat exchange efficiency.

[0072] For example, in Figure 1 and Figure 3 In the embodiment, the first heat exchanger 120 and the second heat exchanger 130 are both coils 210. For example, the first heat exchanger 120 is a water coil, that is, the cooling medium flowing in the first heat exchanger 120 is cooling water provided by a natural cold source; the second heat exchanger 130 is a fluorine coil, that is, the refrigerant flowing in the second heat exchanger 130 includes fluorine. In this embodiment of the application, by setting the first heat exchanger 120 and the second heat exchanger 130 as coils 210, the heat exchange area can be further increased and the heat exchange efficiency can be improved.

[0073] In some embodiments, the coil 210 includes a connecting pipe 211 and a plurality of sub-coils 212, wherein the plurality of sub-coils 212 are parallel to each other and extend in a direction perpendicular to the wind wall 110, i.e., the sub-coils 212 are arranged horizontally, and the connecting pipe 211 is constructed to connect two adjacent sub-coils 212; wherein, among the plurality of sub-coils 212, some of the sub-coils 212 are arranged at intervals along a horizontal direction, such as an X direction, and another portion of the sub-coils 212 are arranged at intervals along a horizontal direction, such as a Y direction, so that the overall coil 210 formed by the plurality of sub-coils 212 and the connecting pipe 211 connected between two adjacent sub-coils 212 presents a vertical structure.

[0074] In the embodiment of the present application, by setting the coil 210 as a vertical structure and arranging the sub-coils 212 in the coil 210 in a horizontal direction, compared with the traditional V-shaped coil 210, the heat exchange area of ​​the coil 210 can be increased, the equipment resistance can be reduced, the heat exchange efficiency can be improved, and the equipment energy efficiency can be improved.

[0075] The number of the sub-coils 212 can be adaptively set according to actual needs and is not limited here.

[0076] Therefore, in the embodiment of the present application, through two different cooling methods of natural cooling medium and refrigerant provided by the cooling source, the first cooling unit and the second cooling unit are selectively started according to the actual working conditions to ensure the outlet air temperature of the air outlet side 112, so as to cool the IT equipment in the data center, shorten the heat exchange link, improve the annual energy efficiency of the refrigeration device 100, effectively reduce the energy consumption of the refrigeration device 100 of the data center, and reduce the PUE of the computer room to meet the PUE control indicators that are tightened year by year.

[0077] In some embodiments, the air inlet side 111 and the air outlet side 112 are arranged opposite to each other and spaced apart, so that convection is formed between the air inlet side 111 and the air outlet side 112, which can increase the fluidity of the air flow and thus improve the efficiency of cooling the IT equipment.

[0078] In addition, there may be multiple air inlets on the air inlet side 111. Exemplarily, the shape of the air inlet is an opening of any shape, such as a circular hole, a square hole, an elliptical hole, etc., as long as the air flow can enter the wind wall 110 with low wind resistance; for example, the wind wall 110 on the air inlet side 111 is provided with multiple isolation nets, and the multiple isolation nets are interwoven horizontally and vertically to form an air inlet; or, the air inlet side 111 includes multiple grids, and the grids are staggered to form multiple air inlets; or, the wind wall 110 on the air inlet side 111 is a hollow structure, and the hollow structure is surrounded to form an air inlet; or, the air inlet and the wind wall 110 on the air inlet side 111 are formed by an integrated molding process, etc., and there is no specific limitation.

[0079] In some embodiments, please refer to Figure 2 As shown, a filter 230 is provided on the air inlet side 111 of the wind wall 110, so that dust particles in the air flow can be isolated by the filter 230, preventing the dust particles from entering the refrigeration device 100 and affecting the performance of the refrigeration device 100, thereby extending the service life of the refrigeration device 100.

[0080] Exemplarily, the filter 230 can isolate dust particles without affecting the flow of airflow and increasing the wind resistance of the airflow. The filter 230 can be made of metal or non-metal, which is not limited here.

[0081] In addition, to further increase the fluidity of the airflow, please refer to Figure 1 and Figure 3 As shown, at least one fan 220 may be disposed between the air inlet side 111 of the wind wall 110 and the first heat exchanger 120 , so as to increase the fluidity of the airflow in the wind wall 110 through the fan 220 , thereby improving the cooling efficiency.

[0082] The number of fans 220 can be increased according to actual needs and is not specifically limited here.

[0083] Please refer to Figure 5 As shown, the outlet side 112 may also have multiple outlets. For example, the outlets may be in the shape of circular holes, square holes, elliptical holes, or other openings of any shape, as long as the airflow can be discharged through the outlets with low wind resistance. Figure 5 In order to reduce the wind resistance on the air outlet side 112, a plurality of isolation members are arranged on the wind wall 110 on the air outlet side 112, and the plurality of isolation members are interwoven horizontally and vertically to form a plurality of air outlets. The isolation members may be, for example, isolation strips or other structures, as long as the wind resistance can be reduced; or, the air outlet side 112 is a grid wall, and the grid wall forms the air outlet side 112 with air outlets; or, the wind wall 110 on the air inlet side 111 is a hollow structure, and the hollow structure is surrounded to form an air inlet; or, the air inlet and the wind wall 110 on the air inlet side 111 are formed by an integrated molding process, etc., and there is no specific limitation.

[0084] In some embodiments, please refer back to Figure 1 As shown, the cooling cycle loop also includes a third heat exchanger 140, a compressor 150 and an electronic expansion valve 160. The compressor 150, the third heat exchanger 140, the electronic expansion valve 160 and the second heat exchanger 130 are connected in a cycle in sequence to form a circulation path for the flow of refrigerant.

[0085] It should be noted that, in the embodiment of the present application, the third heat exchanger 140 and the first heat exchanger 120 are connected in parallel. Compared with connecting the two in series, the third heat exchanger 140 and the first heat exchanger 120 are connected in parallel to reduce equipment resistance.

[0086] The refrigeration device 100 provided in the embodiment of the present application can be compatible with traditional air-cooled server rooms, air-liquid cooled hybrid rooms, and plate-type liquid cooled rooms, thereby achieving a unified refrigeration system architecture, thereby reducing the complexity of room design and operation and maintenance. Different refrigeration modes can be switched according to different working conditions to improve refrigeration efficiency while reducing the energy consumption of the refrigeration device 100.

[0087] It can be understood that when the refrigerant flows through the second heat exchanger 130, it absorbs the heat generated by the data center, and when the refrigerant flows through the third heat exchanger 140, it releases the heat. Therefore, in an embodiment of the present application, the third heat exchanger 140 includes a first channel 141 and a second channel 142 that are thermally connected. The first channel 141 is connected to a cooling cycle loop for the circulation of the refrigerant, and the second channel 142 is connected to a cooling source, that is, the cooling source provides a cooling medium such as cooling water to the second channel 142, that is, the cooling source can be a natural cold source to absorb the heat released by the refrigerant through the cooling medium circulating in the second channel 142. In this way, the heat released by the refrigerant of the third heat exchanger 140 can be recovered without consuming electricity, thereby reducing the energy consumption of the refrigeration device 100.

[0088] In a specific implementation, the compressor 150 is started, and the second heat exchanger 130 absorbs the heat of the air flow that enters the wind wall 110 through the air inlet side 111 in sequence, so that the liquid refrigerant flowing through the second heat exchanger 130 absorbs heat and vaporizes into a gaseous refrigerant. The refrigerant that has absorbed heat is compressed into high-temperature and high-pressure steam by the compressor 150, and then enters the third heat exchanger 140. The third heat exchanger 140 is used to absorb the heat released by the refrigerant flowing through the first channel 141 through the cooling medium flowing through the second channel 142 to reduce the temperature of the refrigerant in the first channel 141. In this way, the gaseous refrigerant releases heat through the third heat exchanger 140 to form a liquid refrigerant, and the liquid refrigerant then passes through the electronic expansion valve 160 to form a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger 130 again to absorb the heat of the air flow entering the wind wall 110, so as to achieve the purpose of cooling and refrigerating the IT equipment, thereby making full use of the heat transfer capacity of the refrigerant phase change and effectively reducing power consumption.

[0089] Exemplarily, the second heat exchanger 130 can be an evaporator, and the third heat exchanger 140 can be a brazed plate heat exchanger. By configuring the third heat exchanger 140 as a brazed plate heat exchanger and configuring the brazed plate heat exchanger in parallel with the first heat exchanger 120, the equipment resistance can be reduced, the equipment energy efficiency can be improved, and the compatibility of the refrigeration device 100 can be improved.

[0090] It should be noted that Figure 1 The schematic diagram only illustrates the basic principle of the refrigeration device 100. The refrigeration device 100 provided in the embodiment of the present application can increase the number of the compressor 150, the third heat exchanger 140, the first heat exchanger 120, the second heat exchanger 130 and the fan 220 according to the actual capacity requirements, and no specific limitation is made here.

[0091] In some embodiments, the cooling source includes a water supply end 170 and a return water end 180, and the first heat exchanger 120 and the second channel 142 are both connected between the water supply end 170 and the return water end 180. Exemplarily, the water supply end 170 can be a water supply pipeline connected to a cooling container such as a dry cooler or a cooling tower that holds a cooling medium, and the return water end 180 is, for example, a return water pipeline connected to a cooling container such as a dry cooler or a cooling tower that holds a cooling medium. In this way, the first heat exchanger 120 and the second channel 142 are respectively connected to the water supply end 170 and the return water end 180, so that the cooling water and other cooling media can perform heat exchange when flowing in the first heat exchanger 120 and the second channel 142, respectively, thereby saving electric energy and reducing the energy consumption of the refrigeration device 100.

[0092] In some embodiments, the refrigeration device 100 also includes a control unit, which includes a first control valve 190 and a second control valve 200. The first control valve 190 is arranged between the cooling source and the first heat exchanger 120; the second control valve 200 is arranged between the cooling source and the second channel 142. In this way, the opening of the first control valve 190 and the second control valve 200 can be controlled respectively to accurately control the flow rate of the cooling medium passing through the cooling source and the first heat exchanger 120 and the second channel 142 according to actual needs, wherein the cooling medium is, for example, a natural cold source, thereby improving the utilization rate of the natural cold source, allowing the refrigeration device 100 to operate at a better energy efficiency point and reduce electricity consumption.

[0093] The refrigeration device 100 provided in the embodiment of the present application can be divided into three working modes, that is, the first mode can be: mechanical refrigeration of the second cooling unit; the second mode can be: pre-cooling of the first cooling unit + mechanical refrigeration of the second cooling unit; the third mode can be: natural cooling of the first cooling unit. The above three working modes can be selected according to specific working conditions.

[0094] For example, the cooling medium is cooling water and the refrigerant is fluorine. The temperature of the data center when not cooled is 37°C and needs to be reduced to 25°C, that is, the inlet air temperature on the inlet side 111 is 37°C, and the outlet air temperature on the outlet side 112 is 25°C after being cooled by the refrigeration device 100.

[0095] In some embodiments, when the temperature of the cooling medium provided by the cooling source is greater than a first preset temperature, the first preset temperature is, for example, 34°C, that is, when the temperature of the cooling water provided by the cooling source is greater than 34°C (for example, during the high temperature period in subtropical summer, the cooling water provided by the outdoor cooling source may exceed 34°C), due to the small temperature difference between the water temperature of the cooling water and the inlet air temperature, the cooling capacity of the first heat exchange tube is limited. Therefore, the first control valve 190 is closed, that is, the cooling unit does not work, the compressor 150 starts running and the second control valve 200 is opened, that is, the refrigeration device 100 enters the mechanical cooling working mode, so that the second cooling unit works to cool the airflow entering the wind wall 110 to 25°C and then discharge it through the air outlet side 112 to supply air to the IT equipment for cooling.

[0096] When the temperature of the cooling medium provided by the cooling source is less than or equal to the first preset temperature and greater than the second preset temperature, the second preset temperature is, for example, 21°C, the compressor 150 is running, and the first control valve 190 and the second control valve 200 are both opened. That is to say, as the outdoor temperature decreases, when the temperature of the cooling water provided by the cooling source drops below 34°C and is higher than 21°C, the refrigeration device 100 starts the pre-cooling + mechanical refrigeration mode, that is, the first cooling unit and the second cooling unit are both started and operated. In this way, the airflow entering the wind wall 110 first passes through the first heat exchanger 120 for pre-cooling and cooling. When the cooling capacity is insufficient, it is further cooled by the second heat exchanger 130 and supplied through the air outlet side 112 to ensure, for example, 25°C air supply, thereby improving the refrigeration efficiency, reducing the energy consumption of the refrigeration device 100, and thereby improving the energy efficiency of the refrigeration device 100 throughout the year.

[0097] When the temperature of the cooling medium provided by the cooling source is less than or equal to the second preset temperature, the first control valve 190 is opened, and the compressor 150 and the second control valve 200 are closed. That is, as the outdoor temperature continues to decrease, when the temperature of the cooling water provided by the cooling source is lower than 24°C, the refrigeration device 100 can adopt a natural cooling working mode, that is, the first cooling unit works, and the second cooling unit does not work, to ensure, for example, 25°C air supply. In this way, the power consumption of the refrigeration device 100 can be further saved, energy consumption can be reduced, and the energy efficiency of the refrigeration device 100 throughout the year can be improved.

[0098] Therefore, the embodiment of the present application uses the first cooling unit and the second cooling unit to selectively exchange heat with the high-temperature airflow according to the temperature of the cooling medium, shortening the heat exchange link, reducing energy consumption, and improving the energy efficiency of the refrigeration device 100 throughout the year.

[0099] In some embodiments, it also includes: a temperature sensor, which is electrically connected to the first control valve 190 and the second control valve 200 respectively, and the temperature sensor is configured to detect the temperature of the cooling medium in the cooling source. In this way, the temperature of the cooling medium can be accurately known, and the opening and closing of the first control valve 190 and the second control valve 200 can be determined based on the detected temperature of the cooling medium, thereby improving the accuracy of switching of the refrigeration device 100 in different working modes.

[0100] In some embodiments, the control unit also includes a controller, which is electrically connected to the temperature sensor, the first control valve 190, the second control valve 200 and the compressor 150, respectively. The controller is configured to control the opening and closing of the first control valve 190, the second control valve 200 and the compressor 150 according to the temperature of the cooling medium in the cooling source detected by the temperature sensor, thereby improving the intelligence of the refrigeration device 100 and the accuracy of the operating mode, thereby improving the user experience.

[0101] It can be seen that the refrigeration device 100 provided in the embodiment of the present application determines the opening and closing of the first cooling unit and the second cooling unit by the temperature of the cooling medium, which can reduce the energy consumption of mechanical refrigeration while ensuring the air supply temperature on the air outlet side 112, thereby improving the energy efficiency of the refrigeration device 100 throughout the year.

[0102] An embodiment of the present application further provides a data center, which includes a refrigeration device as provided in the above embodiment, and the refrigeration device is used to dissipate heat from servers and other equipment in the data center to ensure the normal operation of the data center.

[0103] The structure and principle of the refrigeration device have been described in detail in the above embodiments and will not be repeated here.

[0104] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0105] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A refrigeration device, characterized in that: include: A wind wall, comprising an air inlet side and an air outlet side, wherein the air outlet side is configured to face the equipment to be cooled; A first cooling unit, comprising a first heat exchanger located in the wind wall, the first heat exchanger being connected to a cooling source and configured to conduct heat exchange with a cooling medium in the cooling source; a second cooling unit, comprising a cooling circulation loop, the cooling circulation loop comprising a second heat exchanger, a refrigerant flowing through the cooling circulation loop, the second heat exchanger being configured to perform heat exchange through a phase change of the refrigerant, the first heat exchanger and the second heat exchanger being sequentially arranged from the air inlet side to the air outlet side; The first cooling unit and the second cooling unit can be selectively opened and closed to cool the airflow entering through the air inlet side, and discharge the cooled airflow through the air outlet side.

2. The refrigeration device according to claim 1, characterized in that: The air inlet side and the air outlet side are opposite to each other and spaced apart.

3. The refrigeration device according to claim 1, characterized in that: The cooling circulation loop further includes a third heat exchanger, a compressor and an electronic expansion valve. The compressor, the third heat exchanger, the electronic expansion valve and the second heat exchanger are cyclically connected in sequence.

4. The refrigeration device according to claim 3, characterized in that: The third heat exchanger includes a first channel and a second channel which are thermally connected. The first channel is connected to the cooling circulation loop for the refrigerant to flow through, and the second channel is connected to the cooling source.

5. The refrigeration device according to claim 3, characterized in that: The second heat exchanger is an evaporator, and the third heat exchanger is a brazed plate heat exchanger.

6. The refrigeration device according to claim 4, characterized in that: The cooling source includes a water supply end and a water return end, and the first heat exchanger and the second channel are both connected between the water supply end and the water return end.

7. The refrigeration device according to claim 4, characterized in that: Also includes: A control unit includes a first control valve and a second control valve, wherein the first control valve is arranged between the cooling source and the first heat exchanger; and the second control valve is arranged between the cooling source and the second channel.

8. The refrigeration device according to claim 7, characterized in that: When the temperature of the cooling medium provided by the cooling source is greater than a first preset temperature, the first control valve is closed, the compressor is operated, and the second control valve is opened; When the temperature of the cooling medium provided by the cooling source is less than or equal to the first preset temperature and greater than the second preset temperature, the compressor operates, and the first control valve and the second control valve are both opened; When the temperature of the cooling medium provided by the cooling source is less than or equal to the second preset temperature, the first control valve is opened, and the compressor and the second control valve are closed.

9. The refrigeration device according to claim 8, characterized in that: Also includes: A temperature sensor is electrically connected to the first control valve and the second control valve respectively, and is configured to detect the temperature of the cooling medium in the cooling source.

10. The refrigeration device according to claim 9, characterized in that: The control unit also includes a controller, which is electrically connected to the temperature sensor, the first control valve, the second control valve and the compressor, respectively, and is configured to control the opening and closing of the first control valve, the second control valve and the compressor according to the temperature of the cooling medium in the cooling source detected by the temperature sensor.

11. The refrigeration device according to any one of claims 1 to 4, characterized in that: At least one of the first heat exchanger and the second heat exchanger is a coil.

12. The refrigeration device according to claim 11, characterized in that: The first heat exchanger and the second heat exchanger are both coils.

13. The refrigeration device according to claim 11, characterized in that: The coil comprises a connecting pipe and a plurality of sub-coils, the plurality of sub-coils are parallel to each other and extend in a direction perpendicular to the wind wall, and the connecting pipe is configured to connect two adjacent sub-coils.

14. The refrigeration device according to claim 13, characterized in that: The air inlet side has an air inlet, and the projected area of ​​the coil on the air inlet side covers the projected area of ​​the air inlet on the air inlet side.

15. The refrigeration device according to any one of claims 1 to 4, characterized in that: At least one fan is arranged between the air inlet side of the wind wall and the first heat exchanger.

16. The refrigeration device according to any one of claims 1 to 4, characterized in that: The air inlet side of the wind wall is provided with a filter screen.

17. A data center, characterized in that: Comprising a refrigeration device as claimed in any one of claims 1 to 16.

Images