Water chilling unit and control method thereof

Abstract

The invention discloses a water chilling unit and a control method thereof. The water chilling unit comprises a first cooling system, a second cooling system, a first cold supply end and a second cold supply end. The first cooling system comprises a circulating pump, a first heat exchanger and a second heat exchanger, the circulating pump, the first heat exchanger and the second heat exchanger are sequentially connected and form a first circulating flow path for circulating flow of cooling liquid, and the second cooling system comprises a compressor, a condenser, a throttling component and an evaporator; the compressor, the condenser, the throttling component and the evaporator are sequentially connected to form a second circulation flow path used for refrigerant circulation flow, the first cold supply end is connected with the first heat exchanger, the first heat exchanger is used for supplying cold to the first cold supply end, the second cold supply end is connected with the evaporator, and the evaporator is used for supplying cold to the second cold supply end. According to the water chilling unit provided by the embodiment of the invention, two kinds of cooling capacity at different temperatures can be independently supplied at the same time, and the cooling requirements of different scenes can be met at the same time.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to a chiller unit and its control method. Background Technology

[0002] Chillers are typically used for temperature control in industrial settings or large spaces, such as data center server rooms. However, current technologies only provide one temperature of chilled water at a time, failing to meet the chilled water needs of different scenarios simultaneously. Therefore, improvements are needed. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a chiller unit that can simultaneously and separately supply cooling capacity at two different temperatures, thereby meeting the cooling needs of different scenarios.

[0004] According to a first aspect of the present invention, a chiller unit includes: a first cooling system comprising a circulating pump, a first heat exchanger, and a second heat exchanger, wherein the circulating pump, the first heat exchanger, and the second heat exchanger are sequentially connected to form a first circulation path for circulating coolant, and the second heat exchanger is located outdoors and is used for heat exchange with outdoor air; a second cooling system comprising a compressor, a condenser, a throttling device, and an evaporator, wherein the compressor, the condenser, the throttling device, and the evaporator are sequentially connected to form a second circulation path for circulating refrigerant; a first cooling supply end connected to the first heat exchanger, wherein the first heat exchanger is used to supply cooling capacity to the first cooling supply end; and a second cooling supply end connected to the evaporator, wherein the evaporator is used to supply cooling capacity to the second cooling supply end.

[0005] According to an embodiment of the present invention, the chiller unit provides cooling through two different cooling systems. The first cooling system supplies cooling capacity to a first cooling end, and the second cooling system supplies cooling capacity to a second cooling end. The first and second cooling ends can simultaneously and independently provide cooling capacity at different temperatures. For example, the first and second cooling ends can simultaneously and independently provide chilled water at two different temperatures, thereby meeting the cooling needs of different scenarios. For example, when the chiller unit is used in a data center, it can simultaneously meet the cooling needs of different scenarios in the data center, achieving efficient cooling of the data center while saving energy.

[0006] According to some embodiments of the present invention, the first cooling end includes a first outlet water pipe and a first return water pipe, and the water flowing into the first return water pipe exchanges heat with the first heat exchanger and then flows into the first outlet water pipe; the second cooling end includes a second outlet water pipe and a second return water pipe, and the water flowing into the second return water pipe exchanges heat with the evaporator and then flows into the second outlet water pipe.

[0007] According to some embodiments of the present invention, a first heat exchange channel and a second heat exchange channel are formed in the first heat exchanger, which are mutually isolated and exchange heat with each other. The first heat exchange channel connects the circulating pump and the second heat exchanger, and the second heat exchange channel connects the first outlet water pipe and the first return water pipe.

[0008] According to some embodiments of the present invention, a third heat exchange channel and a fourth heat exchange channel are formed in the evaporator, which are mutually isolated and exchange heat with each other. The third heat exchange channel connects the throttling component and the compressor, and the fourth heat exchange channel connects the second outlet water pipe and the second return water pipe.

[0009] According to some embodiments of the present invention, the chiller unit includes a supplementary cooling system, which is connected to both the first cooling end and the second cooling end, and is used to transfer a portion of the cooling capacity of the second cooling end to the first cooling end.

[0010] According to some embodiments of the present invention, the cooling replenishment system includes a control valve assembly for controlling the on / off state of the cooling replenishment path between the second cooling supply end and the first cooling supply end.

[0011] According to some embodiments of the present invention, the first cooling end includes a first outlet water pipe and a first return water pipe. Water flowing into the first return water pipe exchanges heat with the first heat exchanger and then flows into the first outlet water pipe. The second cooling end includes a second outlet water pipe and a second return water pipe. Water flowing into the second return water pipe exchanges heat with the evaporator and then flows into the second outlet water pipe. The cooling replenishment system includes a cooling replenishment pipe, which includes an inlet end and an outlet end. The inlet end is connected to the second outlet water pipe or the second return water pipe, and the outlet end is connected to the second outlet water pipe or the second return water pipe to form a cooling replenishment flow path. The cooling replenishment pipe is connected to the first outlet water pipe to replenish cooling capacity to the first outlet water pipe.

[0012] According to some embodiments of the present invention, the cooling replenishment path includes a first cooling replenishment path and / or a second cooling replenishment path; wherein, the inlet end is connected to the second return water pipe through a first connecting pipe and the outlet end is connected to the second return water pipe through a second connecting pipe to form the first cooling replenishment path; the inlet end is connected to the second outlet water pipe through a third connecting pipe and the outlet end is connected to the second outlet water pipe through a fourth connecting pipe to form the second cooling replenishment path.

[0013] According to some embodiments of the present invention, the cooling replenishment system includes a control valve assembly, the control valve assembly including a second control valve and / or a third control valve; wherein, the second control valve is disposed in the first connecting pipe or the second connecting pipe for controlling the on / off state of the first cooling replenishment flow path; the third control valve is disposed in the third connecting pipe or the fourth connecting pipe for controlling the on / off state of the second cooling replenishment flow path.

[0014] According to some embodiments of the present invention, the connection position between the inlet end and the second return water pipe is a first connection position, and the connection position between the outlet end and the second return water pipe is a second connection position. In the water flow direction within the second return water pipe, the second connection position is located downstream of the first connection position.

[0015] According to some embodiments of the present invention, the connection position between the inlet end and the second outlet pipe is a third connection position, and the connection position between the outlet end and the second outlet pipe is a fourth connection position. In the direction of water flow in the second outlet pipe, the fourth connection position is located downstream of the third connection position.

[0016] According to some embodiments of the present invention, the cooling system includes a cooling heat exchanger, wherein a fifth heat exchange channel and a sixth heat exchange channel are formed therein, which are isolated from each other and exchange heat with each other. The fifth heat exchange channel is connected in series with the cooling pipeline, and the sixth heat exchange channel is connected in series with the first outlet water pipeline.

[0017] According to some embodiments of the present invention, a chiller unit includes: a heat dissipation pipe, the two ends of which are a liquid inlet and a liquid outlet, both of which are connected to a first circulation path, the heat dissipation pipe being connected to the condenser, and the heat dissipation pipe being used to introduce coolant from the first circulation path into the heat dissipation pipe to dissipate heat from the condenser.

[0018] According to some embodiments of the present invention, the liquid inlet is connected to the downstream side of the first heat exchanger, and the liquid outlet is connected to the inlet of the second heat exchanger.

[0019] According to some embodiments of the present invention, a seventh heat exchange channel and an eighth heat exchange channel are formed in the condenser, which are mutually isolated and exchange heat with each other. The seventh heat exchange channel connects the compressor and the throttling component, and the eighth heat exchange channel is connected in series with the heat dissipation pipeline.

[0020] According to some embodiments of the present invention, the chiller unit includes a spray system for spraying cooling water onto the second heat exchanger.

[0021] According to some embodiments of the present invention, the chiller unit includes an outdoor fan located outdoors and used to dissipate heat from the second heat exchanger.

[0022] A control method for a chiller unit according to a second aspect of the present invention, wherein the chiller unit is a chiller unit according to a first aspect of the present invention, the chiller unit includes a cooling replenishment system, the cooling replenishment system being connected to both the first cooling supply end and the second cooling supply end, the cooling replenishment system being used to transfer a portion of the cooling capacity of the second cooling supply end to the first cooling supply end, and the control method for the chiller unit includes:

[0023] The on / off state of the supplemental cooling path between the second cooling end and the first cooling end is controlled according to the outdoor ambient temperature.

[0024] According to the control method of the chiller unit of the present invention, the chiller unit is the chiller unit of the first aspect embodiment of the present invention described above. It can provide cooling capacity to a first cooling end and a second cooling end through two different cooling systems respectively. This allows the chiller unit to simultaneously and separately provide two different temperatures of cooling capacity, such as chilled water, thereby meeting the cooling needs of different scenarios at the same time. Furthermore, by connecting the first cooling end and the second cooling end through a supplementary cooling system, the second cooling end can supplement the cooling capacity of the first cooling end to better meet the cooling needs corresponding to the first cooling end. By controlling the on / off of the supplementary cooling path between the second cooling end and the first cooling end according to the outdoor ambient temperature, the temperature of the cooling capacity, such as chilled water, provided by the first cooling end can better meet the cooling needs under different outdoor ambient temperatures.

[0025] According to some embodiments of the present invention, controlling the on / off state of the supplementary cooling path between the second cooling terminal and the first cooling terminal based on the outdoor ambient temperature includes:

[0026] When the outdoor ambient temperature is lower than the first preset temperature, the cooling supply path between the second cooling end and the first cooling end is disconnected.

[0027] When the outdoor ambient temperature is greater than or equal to the first preset temperature, the connection of the supplemental cooling path between the second cooling end and the first cooling end is controlled.

[0028] According to some embodiments of the present invention, the first cooling end includes a first outlet water pipe and a first return water pipe. Water flowing into the first return water pipe exchanges heat with the first heat exchanger and then flows into the first outlet water pipe. The second cooling end includes a second outlet water pipe and a second return water pipe. Water flowing into the second return water pipe exchanges heat with the evaporator and then flows into the second outlet water pipe. The cooling compensation system includes a cooling compensation pipe, which includes an inlet end and an outlet end. The inlet end is connected to the second outlet water pipe or the second return water pipe, and the outlet end is connected to the second outlet water pipe or the second return water pipe. A return water pipeline is connected to form a cooling replenishment path. The cooling replenishment pipeline is connected to the first outlet water pipeline to replenish cooling capacity to the first outlet water pipeline. The cooling replenishment path includes a first cooling replenishment path and a second cooling replenishment path. The inlet end is connected to the second return water pipeline via a first connecting pipeline, and the outlet end is connected to the second return water pipeline via a second connecting pipeline to form the first cooling replenishment path. The inlet end is connected to the second outlet water pipeline via a third connecting pipeline, and the outlet end is connected to the second outlet water pipeline via a fourth connecting pipeline to form the second cooling replenishment path.

[0029] The control method for the chiller unit includes:

[0030] When the outdoor ambient temperature is greater than or equal to a first preset temperature, controlling the connection of the supplementary cooling path between the second cooling terminal and the first cooling terminal includes:

[0031] When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than the second preset temperature, the first cooling replenishment path is controlled to be turned on and the second cooling replenishment path is controlled to be turned off, and the second preset temperature is greater than the first preset temperature.

[0032] When the outdoor ambient temperature is greater than or equal to the second preset temperature, the second cooling replenishment path is turned on and the first cooling replenishment path is turned off.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0035] Figure 1 This is a simplified schematic diagram of a chiller unit according to some embodiments of the present invention;

[0036] Figure 2 yes Figure 1 A schematic diagram of the chiller unit in its first operating mode;

[0037] Figure 3 yes Figure 1 A schematic diagram of the chiller unit in the second operating mode;

[0038] Figure 4 yes Figure 1 A schematic diagram of the chiller unit in the third operating mode.

[0039] Figure label:

[0040] 100. Chiller unit;

[0041] 10. First cooling system; 11. Circulating pump; 12. First heat exchanger; 121. First heat exchange channel; 122. Second heat exchange channel; 13. Second heat exchanger; 14. First circulation path;

[0042] 20. Second cooling system; 21. Compressor; 22. Condenser; 221. Seventh heat exchange channel; 222. Eighth heat exchange channel; 23. Throttling component; 24. Evaporator; 241. Third heat exchange channel; 242. Fourth heat exchange channel; 25. Second circulation path;

[0043] 30. First cooling supply end; 31. First water outlet pipe; 32. First water return pipe;

[0044] 40. Second cooling supply end; 41. Second water outlet pipe; 42. Second water return pipe;

[0045] 50. Cooling replenishment system; 510. First control valve; 511. Second control valve; 512. Third control valve; 52. Cooling replenishment pipeline; 521. Inlet end; 522. Outlet end; 523. First connecting pipeline; 524. Second connecting pipeline; 525. Third connecting pipeline; 526. Fourth connecting pipeline; 527. First connection position; 528. Second connection position; 529. Third connection position; 530. Fourth connection position; 54. Cooling replenishment flow path; 541. First cooling replenishment flow path; 542. Second cooling replenishment flow path; 55. Cooling replenishment heat exchanger; 551. Fifth heat exchange flow channel; 552. Sixth heat exchange flow channel;

[0046] 60. Heat dissipation piping; 61. Liquid inlet; 62. Liquid outlet;

[0047] 70. Sprinkler system; 71. Sprinkler pump; 72. Water storage tank; 73. Sprinkler components;

[0048] 80. Outdoor fan. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] The following is for reference. Figures 1-4 A chiller unit 100 according to an embodiment of the present invention is described.

[0051] refer to Figure 1 According to a first aspect of the present invention, a chiller unit 100 includes: a first cooling system 10, a second cooling system 20, a first cooling supply end 30, and a second cooling supply end 40.

[0052] The first cooling system 10 includes a circulating pump 11, a first heat exchanger 12, and a second heat exchanger 13. The circulating pump 11 drives the coolant to circulate within the first cooling system 10. The circulating pump 11, the first heat exchanger 12, and the second heat exchanger 13 are connected sequentially to form a first circulation path 14 for coolant circulation. The second heat exchanger 13 is located outdoors and exchanges heat with outdoor air. A first cooling supply end 30 is connected to the first heat exchanger 12, which supplies cooling capacity to the first cooling supply end 30. The connection between the first cooling supply end 30 and the first heat exchanger 12 enables heat exchange between them, for example, through thermal conduction or by the heat exchange medium within the first cooling supply end 30 flowing through the first heat exchanger 12 for heat exchange.

[0053] For example, when the coolant circulates to the second heat exchanger 13 under the action of the circulating pump 11, the coolant exchanges heat with the outdoor air. When the outdoor temperature is relatively lower than the indoor temperature, the temperature of the coolant can be reduced. When the coolant circulates to the first heat exchanger 12 under the action of the circulating pump 11, the coolant exchanges heat with the first cooling end 30, thereby transferring the cooling capacity to the first cooling end 30. The first cooling end 30 cools the target scene. For example, the first cooling end 30 can cool the indoor environment and reduce the indoor temperature. This indoor environment can be the indoor environment of a data center server room.

[0054] The second cooling system 20 includes a compressor 21, a condenser 22, a throttling device 23, and an evaporator 24. The compressor 21, condenser 22, throttling device 23, and evaporator 24 are sequentially connected to form a second circulation path 25 for refrigerant circulation. A second cooling supply end 40 is connected to the evaporator 24, which supplies cooling capacity to the second cooling supply end 40. The connection between the second cooling supply end 40 and the second heat exchanger 13 enables heat exchange between them. For example, the second cooling supply end 40 and the second heat exchanger 13 can be thermally connected, or the heat exchange medium in the second cooling supply end 40 can flow through the second heat exchanger 13 to exchange heat with it.

[0055] For example, when compressor 21 is working, compressor 21 discharges compressed refrigerant to condenser 22. The refrigerant flowing through condenser 22 is throttled and depressurized by throttling component 23, and then flows through evaporator 24. The refrigerant flowing through evaporator 24 flows back into compressor 21 and is compressed again. In this process, the cooling capacity generated by evaporator 24 can be transferred to the second cooling end 40.

[0056] The first cooling system 10 transfers cooling energy from the outdoor environment to the first cooling end 30 using natural cooling, which reduces energy consumption and saves energy. The second cooling system 20 uses the work done by the compressor 21 to transfer the cooling energy generated by the evaporator 24 to the second cooling end 40 using mechanical cooling. Because the second cooling system 20 and the first cooling system 10 have different sources of cooling energy and different cooling methods, the second cooling end 40 and the first cooling end 30 supply cooling energy at different temperatures, allowing the chiller unit 100 to simultaneously supply cooling energy at different temperatures. Furthermore, the cooling energy temperature supplied by the second cooling end 40 is generally lower than that supplied by the first cooling end 30. For example, the second cooling end 40 and the first cooling end 30 can each supply chilled water at different temperatures, allowing the chiller unit 100 to simultaneously supply chilled water at different temperatures. For example, the chilled water temperature supplied by the second cooling end 40 is generally lower than that supplied by the first cooling end 30.

[0057] The first cooling system 10 and the second cooling system 20 can operate independently. For example, when the chiller unit 100 is operating, only the first cooling system 10 can operate, only the second cooling system 20 can operate, or both the first cooling system 10 and the second cooling system 20 can operate simultaneously. When both the first cooling system 10 and the second cooling system 20 are operating, the chiller unit 100 can simultaneously and independently provide cooling capacity, such as chilled water, at different temperatures, thus meeting the cooling needs of different scenarios.

[0058] For example, when the chiller unit 100 is used in a data center server room, the cooling requirements of the server racks placed in different rooms of the data center server room are different. The cooling capacity of the first cooling end 30 can be provided to the room where the server racks with less heat generation are located or the room with a relatively low temperature, while the cooling capacity of the second cooling end 40 can be provided to the room where the server racks with more heat generation are located or the room with a relatively high temperature. In this way, the chiller unit 100 can simultaneously meet the cooling needs of different scenarios in the data center server room, so that the corresponding scenario temperature can reach the cooling requirement, and energy consumption can be reduced.

[0059] For example, when the chiller unit 100 is used in a data center server room, the cooling capacity of the first cooling end 30 can be provided to the space inside the server room, thereby lowering the overall temperature of the space. The cooling capacity of the second cooling end 40 can be provided to the server racks with higher heat generation for further cooling. In this way, the chiller unit 100 can simultaneously meet the cooling needs of different scenarios in the data center server room, ensuring that the corresponding scenario temperatures meet the cooling requirements, while also reducing energy consumption.

[0060] According to an embodiment of the present invention, the chiller unit 100 provides cooling through two different cooling systems. The first cooling system 10 supplies cooling capacity to the first cooling end 30, and the second cooling system 20 supplies cooling capacity to the second cooling end 40. The first cooling end 30 and the second cooling end 40 can simultaneously provide cooling capacity at different temperatures. For example, the first cooling end 30 and the second cooling end 40 can each provide chilled water at two different temperatures, thereby simultaneously meeting the cooling needs of different scenarios. For example, when the chiller unit 100 is used in a data center server room, it can simultaneously meet the cooling needs of different scenarios in the data center server room, achieving efficient cooling of the data center server room while saving energy.

[0061] refer to Figure 1 According to some embodiments of the present invention, the first cooling end 30 includes a first water outlet pipe 31 and a first water return pipe 32. The water flowing into the first water return pipe 32 exchanges heat with the first heat exchanger 12 and then flows into the first water outlet pipe.

[0062] For example, the first cooling end 30 may also include a water pump, an indoor fan, and an indoor heat exchanger. When the first cooling end 30 cools the room where the data center server room is located, the water pump promotes the circulation of cooling water in the first cooling end 30. The cooling water in the first cooling end 30 circulates to the indoor heat exchanger through the first outlet pipe 31. Under the action of the indoor fan, the indoor air exchanges heat with the indoor heat exchanger, thereby providing the cooling capacity of the first cooling end 30 to the room where the server racks with less heat generation are located or the room with a relatively low temperature. The cooling water with increased temperature circulates from the heat exchanger to the first heat exchanger 12 through the first return pipe 32. It exchanges heat with the first cooling system 10 through the first heat exchanger 12. After the heat exchange, the temperature of the cooling water in the first cooling end 30 decreases. This circulation achieves the purpose of continuously providing the cooling capacity of the first cooling end 30 to the room where the data center server room is located.

[0063] The second cooling end 40 includes a second water outlet pipe 41 and a second water return pipe 42. Water flowing into the second water return pipe 42 exchanges heat with the evaporator 24 and then flows into the second water outlet pipe.

[0064] For example, the second cooling end 40 may also include a water pump. When the second cooling end 40 cools the cabinet with high heat generation, the cabinet is equipped with a liquid cooling channel. The water pump promotes the circulation of cooling water in the second cooling end 40. The cooling water in the second cooling end 40 circulates to the liquid cooling channel through the second outlet pipe 41. During the flow of the cooling water in the liquid cooling channel, it carries away the heat of the cabinet, thereby assisting the cabinet with high heat generation in cooling and heat dissipation. The heated cooling water circulates from the liquid cooling channel to the evaporator 24 through the second return pipe 42. It exchanges heat with the second cooling system 20 through the evaporator 24. After the heat exchange, the temperature of the cooling water in the second cooling end 40 decreases. This circulation achieves the purpose of continuously using the second cooling end 40 to cool and dissipate heat for the cabinet.

[0065] refer to Figure 1 According to some embodiments of the present invention, a first heat exchange channel 121 and a second heat exchange channel 122 are formed in the first heat exchanger 12, which are mutually isolated and exchange heat with each other. For example, the first heat exchanger 12 is a plate heat exchanger. The first heat exchange channel 121 connects the circulating pump 11 and the second heat exchanger 13, and the second heat exchange channel 122 connects the first outlet water pipe 31 and the first return water pipe 32.

[0066] For example, when the first cooling end 30 cools the room where the data center is located, the coolant circulates to the first heat exchanger 12 under the action of the circulating pump 11. The coolant flows into the first heat exchange channel 121, and the cooling water in the first return water pipe 32 flows into the second heat exchange channel 122. At this time, the coolant in the first heat exchange channel 121 and the cooling water in the second heat exchange channel 122 exchange heat. The temperature of the coolant flowing out of the first heat exchange channel 121 increases, and the temperature of the cooling water flowing out of the second heat exchange channel 122 decreases. The coolant flowing out of the first heat exchange channel 121 flows into the second heat exchanger 13 from the first circulation path 14, which lowers the temperature of the coolant. It then flows back to the first heat exchanger 12 from the first circulation path 14 for circulation. The cooling water flowing out of the second heat exchange channel 122 flows into the first outlet water pipe 31 and is used to exchange heat with the indoor air, which lowers the temperature of the indoor air. The temperature of the cooling water after heat exchange increases, and it flows into the first return water pipe 32 for circulation. By utilizing the first heat exchanger 12, the heat exchange between the first cooling system 10 and the first cooling end 30 is made more thorough, thereby improving the overall energy efficiency of the machine.

[0067] refer to Figure 1 According to some embodiments of the present invention, a third heat exchange channel 241 and a fourth heat exchange channel 242 are formed in the evaporator 24, which are mutually isolated and exchange heat with each other. For example, the evaporator 24 is a plate heat exchanger. The third heat exchange channel 241 connects the throttling component 23 and the compressor 21, and the fourth heat exchange channel 242 connects the second outlet water pipe 41 and the second return water pipe 42.

[0068] For example, when the second cooling end 40 cools the cabinet with a large amount of heat, the refrigerant circulating in the second cooling system 20 flows through the throttling component 23 to the evaporator 24. The low-temperature, low-pressure mist-like liquid refrigerant flows into the third heat exchange channel 241, and the cooling water in the second return water pipe 42 flows into the fourth heat exchange channel 242. At this time, the refrigerant in the third heat exchange channel 241 exchanges heat with the cooling water in the fourth heat exchange channel 242. The temperature of the refrigerant flowing out of the third heat exchange channel 241 increases, and the temperature of the cooling water flowing out of the fourth heat exchange channel 242 decreases. The refrigerant flowing out of the third heat exchange channel 241 flows into the compressor 21 and condenser 22 from the second circulation path 25 and circulates. The cooling water flowing out of the fourth heat exchange channel 242 flows into the second outlet water pipe 41 and is used to exchange heat with the cabinet with a large amount of heat to cool and dissipate heat. The temperature of the cooling water after heat exchange increases and flows into the second return water pipe 42 for circulation. By utilizing the evaporator 24, the temperature of the refrigerant in the second cooling system 20 can be reduced, and at the same time, the heat exchange between the second cooling system 20 and the second cooling end 40 can be more thorough. There is no need to install an additional heat exchange core, which saves space in the chiller unit 100 and improves the overall energy efficiency.

[0069] refer to Figure 1According to some embodiments of the present invention, the chiller unit 100 includes a supplementary cooling system 50, which is connected to both the first cooling end 30 and the second cooling end 40. The supplementary cooling system 50 is used to transfer a portion of the cooling capacity of the second cooling end 40 to the first cooling end 30.

[0070] For example, when the outdoor temperature is high, the first cooling system 10 is insufficient to provide cooling to the first cooling end 30. A supplementary cooling system 50 is connected to both the first cooling end 30 and the second cooling end 40, allowing the relatively cooler second cooling end 40 to exchange temperatures with the first cooling end 30. This further lowers the temperature of the cooling water in the first cooling end 30, thus meeting its cooling requirements. By transferring a portion of the cooling capacity from the second cooling end 40 to the first cooling end 30, the temperature of the cooling water in the first cooling end 30 can be reduced, thereby minimizing waste of cooling capacity in the second cooling end 40, achieving energy conservation and reducing condensation caused by excessively low cooling water temperature in the second cooling end 40.

[0071] refer to Figure 1 According to some embodiments of the present invention, the supplemental cooling system 50 includes a control valve assembly for controlling the opening and closing of the supplemental cooling path between the second cooling end 40 and the first cooling end 30.

[0072] For example, when the first cooling system 10 is insufficient to provide cooling capacity to the first cooling end 30, the control valve assembly is opened to connect the supplementary cooling path between the second cooling end 40 and the first cooling end 30, allowing the cooling water in the second cooling end 40 to exchange temperatures with the cooling water in the first cooling end 30. When the first cooling system 10 can provide sufficient cooling capacity to the first cooling end 30, the control valve assembly is closed, allowing the first cooling end 30 to provide cooling independently. By setting the control valve assembly to control the opening and closing of the supplementary cooling path between the second cooling end 40 and the first cooling end 30, supplementary cooling can be provided to the first cooling end 30 according to actual conditions to meet the cooling demand of the cooling water in the first cooling end 30.

[0073] refer to Figure 1According to some embodiments of the present invention, the first cooling end 30 includes a first outlet water pipe 31 and a first return water pipe 32. Water flowing into the first return water pipe 32 exchanges heat with the first heat exchanger 12 and then flows into the first outlet water pipe. The second cooling end 40 includes a second outlet water pipe 41 and a second return water pipe 42. Water flowing into the second return water pipe 42 exchanges heat with the evaporator 24 and then flows into the second outlet water pipe. The cooling replenishment system 50 includes a cooling replenishment pipe 52, which includes an inlet end 521 and an outlet end 522. The inlet end 521 is connected to the second outlet water pipe 41 or the second return water pipe 42, and the outlet end 522 is connected to the second outlet water pipe 41 or the second return water pipe 42 to form a cooling replenishment flow path 54. The cooling replenishment pipe 52 is connected to the first outlet water pipe 31 to replenish the cooling capacity of the first outlet water pipe 31.

[0074] For example, the inlet end 521 can be connected to the second outlet water pipe 41 to form a cooling replenishment flow path 54. The cooling water in the second outlet water pipe 41 replenishes the cooling capacity of the first outlet water pipe 31 by flowing through the cooling replenishment flow path 54. After replenishing the cooling capacity, the cooling water with increased temperature flows out from the outlet end 522 and flows back to the second outlet water pipe 41 through the cooling replenishment flow path 54. The inlet end 521 can also be connected to the second return water pipe 42 to form a cooling replenishment flow path 54. The cooling water in the second return water pipe 42 replenishes the cooling capacity of the first outlet water pipe 31 by flowing through the cooling replenishment flow path 54. After replenishing the cooling capacity, the cooling water with increased temperature flows out from the outlet end 522 and flows back to the second return water pipe 42 through the cooling replenishment flow path 54. By supplementing the cooling capacity of the first cooling end 30 with the second outlet pipe 41 or the second return pipe 42 of the second connection end, the waste of cooling water in the second cooling end 40 can be reduced, and the cooling demand of the cooling water in the first cooling end 30 can be met.

[0075] refer to Figure 1 According to some embodiments of the present invention, the cooling flow path 54 includes a first cooling flow path 541 and / or a second cooling flow path 542. For example, the cooling flow path 54 may include both the first cooling flow path 541 and the second cooling flow path 542, or the cooling flow path 54 may include only one of the first cooling flow path 541 and the second cooling flow path 542.

[0076] The inlet end 521 is connected to the second return water pipe 42 via the first connecting pipe 523, and the outlet end 522 is connected to the second return water pipe 42 via the second connecting pipe 524, forming a first cooling replenishment flow path 541. For example, cooling water in the second return water pipe 42 flows from the inlet end 521 into the cooling replenishment pipe 52 via the first connecting pipe 523 to replenish cooling capacity to the first outlet water pipe 31. After replenishing cooling capacity, the temperature of the cooling water increases and flows from the outlet end 522 into the second connecting pipe 524, and then into the second return water pipe 42.

[0077] The inlet end 521 is connected to the second outlet water pipe 41 via the third connecting pipe 525, and the outlet end 522 is connected to the second outlet water pipe 41 via the fourth connecting pipe 526, forming a second cooling replenishment flow path 542. For example, cooling water in the second outlet water pipe 41 flows from the inlet end 521 into the cooling replenishment pipe 52 via the third connecting pipe 525 to replenish the cooling capacity of the first outlet water pipe 31. After replenishing the cooling capacity, the temperature of the cooling water increases and flows from the outlet end 522 into the fourth connecting pipe 526, and then into the second outlet water pipe 41.

[0078] For example, when the first cooling system 10 is insufficient to provide cooling to the first cooling end 30, the second cooling end 40 needs to supplement the cooling of the first cooling end 30. The supplementary cooling flow path 54 can be connected to the second return water pipe 42 or the second outlet water pipe 41 according to the actual needs. When the cooling water in the second return water pipe 42 is lower than the temperature of the cooling water in the first outlet water pipe 31, the first supplementary cooling flow path 541 can supplement the cooling of the first outlet water pipe. When the cooling water in the second return water pipe 42 is insufficient to provide cooling to the first cooling end 30, the supplementary cooling flow path 54 can be connected to the second outlet water pipe 41, and the first outlet water pipe can be supplemented with cooling through the second supplementary cooling flow path 542, so that the cooling water in the first outlet water pipe has sufficient cooling capacity for cooling. The second outlet pipe 41 and the second return pipe 42 supply cooling at different temperatures, allowing the second cooling supply end 40 to select different temperatures of cooling to supply to the first cooling supply end 30 for supplemental cooling. By setting the first supplemental cooling flow path 541 and the second supplemental cooling flow path 542, the appropriate location of the cooling water in the second cooling supply end 40 can be selected to supplement the cooling capacity of the first outlet pipe 31 according to the actual situation, thus meeting the cooling water supply demand in the first outlet pipe 31. This reduces the waste of cooling water in the second cooling supply end 40 and also reduces condensation caused by the low temperature of the cooling water in the second cooling supply end 40.

[0079] refer to Figure 1 According to some embodiments of the present invention, the cooling replenishment system 50 includes a control valve assembly, which includes a second control valve 511 and / or a third control valve 512. For example, the control valve assembly may include both the second control valve 511 and the third control valve 512, or it may include only one of the second control valve 511 and the third control valve 512.

[0080] The second control valve 511 is located in either the first connecting pipe 523 or the second connecting pipe 524 to control the on / off state of the first cooling supply path 541; the third control valve 512 is located in either the third connecting pipe 525 or the fourth connecting pipe 526 to control the on / off state of the second cooling supply path 542. For example, the second control valve 511 can be located in the first connecting pipe 523 to control the on / off state of the first cooling supply path 541, or it can also be located in the second connecting pipe 524 to control the on / off state of the first cooling supply path 541; the third control valve 512 can be located in the third connecting pipe 525 to control the on / off state of the second cooling supply path 542, or it can also be located in the fourth connecting pipe 526 to control the on / off state of the second cooling supply path 542. By setting up a control valve assembly to control the opening and closing of the first cooling supply path 541 and the second cooling supply path 542, the control valve assembly can be opened or closed according to the actual situation to determine whether to supplement the cooling capacity of the first cooling supply end 30, thereby meeting the cooling demand of the first cooling supply end 30.

[0081] refer to Figure 1 According to some embodiments of the present invention, the connection position between the inlet end 521 and the second return water pipe 42 is the first connection position 527, and the connection position between the outlet end 522 and the second return water pipe 42 is the second connection position 528. In the water flow direction in the second return water pipe 42, the second connection position 528 is located downstream of the first connection position 527.

[0082] For example, the cooling water at the first connection position 527 in the second return water pipe 42 enters the first connecting pipe 523 through the inlet end 521. After exchanging heat with the first cooling supply end 30, it returns to the second connection position 528 in the second return water pipe 42 through the outlet end of the second connecting pipe 524 and continues to flow downstream. Since the cooling water replenishes the cooling of the first cooling supply end 30, the cooling water temperature at the second connection position 528 in the second return water pipe 42 will be higher than the cooling water temperature at the first connection position 527. If the first connection position 527 is located downstream of the second connection position 528, the cooling water that enters the first replenishment cooling flow path 541 from the first connection position 527 for heat exchange will flow out from the upstream side of the first connection position 527. When it flows through the first connection position 527, it will enter the first replenishment cooling flow path 541 again, which is not conducive to supplying cooling to the first cooling supply end 30. By placing the second connection position 528 downstream of the first connection position 527, it is beneficial for the cooling water in the second return water pipe 42 to supply cooling to the first cooling end 30, and also beneficial for the cooling water in the second return water pipe 42 to smoothly enter the evaporator 24 for heat exchange and normal circulation.

[0083] refer to Figure 1According to some embodiments of the present invention, the connection position between the inlet end 521 and the second outlet pipe 41 is the third connection position 529, and the connection position between the outlet end 522 and the second outlet pipe 41 is the fourth connection position 530. In the direction of water flow in the second outlet pipe 41, the fourth connection position 530 is located downstream of the third connection position 529.

[0084] For example, cooling water from the third connection position 529 in the second outlet pipe 41 enters the third connection pipe 525 through the inlet end 521. After exchanging heat with the first cooling end 30, it returns to the fourth connection position 530 in the second outlet pipe 41 through the outlet end of the fourth connection pipe 526 and continues to flow downstream. Since the cooling water replenishes the cooling of the first cooling end 30, the cooling water temperature at the fourth connection position 530 in the second outlet pipe 41 will be higher than the cooling water temperature at the third connection position 529. If the third connection position 529 is located downstream of the fourth connection position 530, the cooling water that enters the second replenishment cooling flow path 542 from the third connection position 529 for heat exchange will flow out from the upstream side of the third connection position 529. When it flows through the third connection position 529, it will enter the second replenishment cooling flow path 542 again, which is not conducive to supplying cooling to the first cooling end 30. By placing the fourth connection position 530 downstream of the third connection position 529, it is beneficial for the cooling water in the second outlet pipe 41 to provide cooling for the first cooling end 30, and also beneficial for the cooling water in the second outlet pipe 41 to exchange heat with the target environment and circulate normally.

[0085] refer to Figure 1 According to some embodiments of the present invention, the cooling system 50 includes a cooling heat exchanger 55, in which a fifth heat exchange channel 551 and a sixth heat exchange channel 552 are formed that are isolated from each other and exchange heat with each other. For example, the cooling heat exchanger 55 is a plate heat exchanger. The fifth heat exchange channel 551 is connected in series with the cooling pipe 52, and the sixth heat exchange channel 552 is connected in series with the first water outlet pipe 31.

[0086] For example, the cooling water from the second cooling end 40 enters the make-up cooling flow path 54 through the inlet end 521, and then flows into the fifth heat exchange flow path 551 in the make-up cooling heat exchanger 55. The cooling water from the first outlet pipe 31 in the first cooling end 30 flows into the sixth heat exchange flow path 552. At this time, the cooling water in the fifth heat exchange flow path 551 and the cooling water in the sixth heat exchange flow path 552 exchange heat. The temperature of the cooling water flowing out of the fifth heat exchange flow path 551 increases, and the temperature of the cooling water flowing out of the sixth heat exchange flow path 552 decreases. The cooling water in the fifth heat exchange flow path 551 flows back to the second cooling end 40 through the outlet end and is circulated. The cooling water flowing out of the sixth heat exchange flow path 552 flows back to the first outlet pipe 31 and is used for cooling the first cooling end 30. By utilizing the supplementary cooling heat exchanger 55, the heat exchange between the first cooling end 30 and the second cooling end 40 can be more thorough, thereby improving the efficiency of the second cooling end 40 in supplementing the cooling of the first cooling end 30.

[0087] refer to Figure 1 According to some embodiments of the present invention, the chiller unit 100 includes: a heat dissipation pipe 60, the two ends of the heat dissipation pipe 60 being an inlet end 61 and an outlet end 62, both the inlet end 61 and the outlet end 62 being connected to a first circulation flow path 14, the heat dissipation pipe 60 being connected to a condenser 22, and the heat dissipation pipe 60 being used to introduce coolant in the first circulation flow path 14 into the heat dissipation pipe 60 to dissipate heat from the condenser 22.

[0088] For example, the coolant flowing out of the first heat exchanger 12 enters the heat dissipation pipe 60 through the inlet 61 of the first circulation path 14, exchanges heat with the condenser 22, and lowers the temperature of the condenser 22. The coolant then returns from the heat dissipation pipe 60 to the first circulation path 14 through the outlet 62, and flows into the second heat exchanger 13 to exchange heat with the outside air. By introducing the coolant in the first circulation path 14 into the heat dissipation pipe 60 to dissipate heat from the condenser 22, the cooling capacity of the coolant in the first cooling system 10 can be effectively utilized, preventing the waste of cooling capacity in the first cooling system 10. The condenser 22 does not require an additional heat exchange core for heat dissipation, which can reduce the airflow resistance of the outdoor fan 80 and the number of outdoor fans 80, significantly reducing the total power of the fans and improving the overall energy efficiency of the chiller unit 100, thus achieving energy saving and consumption reduction.

[0089] refer to Figure 1 According to some embodiments of the present invention, the liquid inlet 61 is connected to the downstream side of the first heat exchanger 12, and the liquid outlet 62 is connected to the inlet of the second heat exchanger 13.

[0090] For example, cooling water flowing out of the first heat exchanger 12 enters the heat dissipation pipe 60 through the inlet 61 of the first circulation path 14, exchanges heat with the condenser 22, and then flows from the heat dissipation pipe 60 through the outlet 62 into the second heat exchanger 13 to exchange heat with the outside air. Because the cooling water dissipates heat to the condenser 22, the cooling water temperature at the outlet 62 in the first circulation path 14 will be higher than the cooling water temperature at the inlet 61. If the inlet 61 is connected upstream of the first heat exchanger 12, the cooling water after heat exchange in the heat dissipation pipe 60 will reduce the cooling effect of the first heat exchanger 12 on the first cooling end 30 due to the increased cooling water temperature, whether it flows directly into the second heat exchanger 13 or into the first heat exchanger 12 after heat exchange. By connecting the liquid inlet end 61 to the downstream side of the first heat exchanger 12, it is beneficial for the cooling water in the first circulation path 14 to first cool the first cooling end 30, and then use the water flowing out of the first heat exchanger 12 to exchange heat with the condenser 22, which has a higher temperature than the first heat exchanger 12, thus better reducing the loss of cooling capacity.

[0091] refer to Figure 1 According to some embodiments of the present invention, a seventh heat exchange channel 221 and an eighth heat exchange channel 222 are formed in the condenser 22, which are mutually isolated and exchange heat with each other. For example, the condenser 22 is a plate heat exchanger. The seventh heat exchange channel 221 connects the compressor 21 and the throttling component 23, and the eighth heat exchange channel 222 is connected in series to the heat dissipation pipe 60.

[0092] For example, the coolant flowing out of the first heat exchanger 12 enters the heat dissipation pipe 60 through the inlet 61 of the first circulation flow path 14, and then flows into the eighth heat exchange flow path 222 in the condenser 22. The high-temperature and high-pressure liquid refrigerant compressed by the compressor 21 flows into the seventh heat exchange flow path 221. At this time, the refrigerant in the seventh heat exchange flow path 221 exchanges heat with the coolant in the eighth heat exchange flow path 222. The temperature of the coolant flowing out of the eighth heat exchange flow path 222 increases, and the temperature of the refrigerant flowing out of the seventh heat exchange flow path 221 decreases. The coolant flowing out of the eighth heat exchange flow path 222 flows back to the first circulation flow path 14 through the outlet of the heat dissipation pipe 60, and the refrigerant flowing out of the seventh heat exchange flow path 221 flows to the throttling component 23 through the second circulation flow path 25. By utilizing the condenser 22, the temperature of the refrigerant in the second cooling system 20 can be reduced to dissipate heat, and at the same time, the heat exchange between the second cooling system 20 and the heat dissipation pipe 60 can be more thorough, which can also improve the efficiency of reducing the temperature of the refrigerant in the second cooling system 20.

[0093] refer to Figure 1 According to some embodiments of the present invention, the chiller unit 100 includes a spray system 70 for spraying cooling water onto the second heat exchanger 13.

[0094] For example, the spray system 70 may include a spray pump 71, a water storage tank 72, and a spray component 73. The spray pump 71 is connected between the water storage tank 72 and the spray component 73. The spray pump 71 is used to transport water from the spray tank to the spray component 73, and the spray component 73 is used to spray cooling water onto the second heat exchanger 13. By using the spray system 70 to spray cooling water onto the second heat exchanger 13, the temperature of the second heat exchanger 13 can be further reduced by utilizing the heat absorption of evaporation of the cooling water, making the rate of temperature reduction of the coolant in the second heat exchanger 13 faster, enhancing the cooling capacity of the first cooling system 10, and thus improving the overall energy efficiency of the unit.

[0095] refer to Figure 1 According to some embodiments of the present invention, the chiller unit 100 includes an outdoor fan 80, which is located outdoors and is used to dissipate heat from the second heat exchanger 13. For example, when the chiller unit 100 includes a spray system 70, the outdoor fan 80 can also increase the evaporation rate of the sprayed cooling water.

[0096] The outdoor fan 80 helps the second heat exchanger 13 dissipate heat by blowing air, increasing the rate of outdoor air circulation, thereby increasing the heat exchange efficiency between the cooling water in the second heat exchanger 13 and the outdoor air, making the cooling water temperature in the second heat exchanger 13 drop at a faster rate, thus improving the working efficiency of the first cooling system 10.

[0097] refer to Figures 2-4 According to a second aspect embodiment of the present invention, the chiller unit 100 is the same as the chiller unit 100 according to a first aspect embodiment of the present invention. The chiller unit 100 includes a supplementary cooling system 50, which is connected to both a first cooling supply end 30 and a second cooling supply end 40. The supplementary cooling system 50 is used to transfer a portion of the cooling capacity of the second cooling supply end 40 to the first cooling supply end 30. The control method of the chiller unit 100 includes:

[0098] Based on the outdoor ambient temperature, the connection and disconnection of the supplementary cooling path between the second cooling end 40 and the first cooling end 30 are controlled. For example, the direction of liquid flow in the flow path can be referenced to the direction indicated by the arrows in the attached diagram. The solid lines in the attached diagram represent the continuity of the flow path, and the dashed lines represent the disconnection of the flow path.

[0099] For example, when the chiller unit 100 is used in a data center server room, the cooling capacity of the first cooling end 30 can be provided to the room where the server racks with lower heat generation are located or the room with a relatively lower temperature, while the cooling capacity of the second cooling end 40 can be provided to the room where the server racks with higher heat generation are located or the room with a relatively higher temperature. When the outdoor ambient temperature is low, the coolant circulating through the first circulation path 14 is sufficient to provide cooling capacity to the first cooling end 30. By controlling the disconnection of the supplemental cooling path between the second cooling end 40 and the first cooling end 30, the coolant in the first cooling system 10 circulates to the second heat exchanger 13 to exchange heat with the cold outdoor air, and then circulates back to the first heat exchanger 12 to exchange heat with the first cooling end 30, thereby reducing the temperature of the first cooling end 30. The first cooling end 30 then provides cooling capacity to the space inside the server room, thereby reducing the temperature of the entire space inside the server room. When the outdoor ambient temperature is high, the coolant circulating through the first circulation path 14 is insufficient to provide cooling to the first cooling end 30. The system controls the connection of the supplementary cooling path between the second cooling end 40 and the first cooling end 30. The supplementary cooling system 50 transfers part of the cooling capacity of the second cooling end 40 to the first cooling end 30, thereby reducing the temperature of the first cooling end 30 to a temperature sufficient to cool the space inside the computer room. The first cooling end 30 provides cooling capacity to the space inside the computer room, thereby reducing the temperature of the space inside the computer room. This allows the cooling capacity provided by the first cooling end 30, such as the temperature of chilled water, to meet the cooling requirements well under different outdoor ambient temperatures.

[0100] According to the control method of the chiller unit 100 of the present invention, the chiller unit 100 is the chiller unit 100 of the first aspect embodiment of the present invention described above. It can provide cooling capacity to the first cooling end 30 and the second cooling end 40 through two different cooling systems respectively. This allows the chiller unit 100 to simultaneously and separately provide two different temperatures of cooling capacity, such as chilled water, thereby meeting the cooling needs of different scenarios at the same time. Furthermore, by connecting the first cooling end 30 and the second cooling end 40 through a supplementary cooling system 50, the second cooling end 40 can supplement the cooling capacity of the first cooling end 30 to better meet the cooling needs corresponding to the first cooling end 30. By controlling the on / off of the supplementary cooling path between the second cooling end 40 and the first cooling end 30 according to the outdoor ambient temperature, the temperature of the cooling capacity, such as chilled water, provided by the first cooling end 30 can better meet the cooling needs under different outdoor ambient temperatures.

[0101] refer to Figures 2-4 According to some embodiments of the present invention, controlling the on / off state of the supplementary cooling path between the second cooling end 40 and the first cooling end 30 based on the outdoor ambient temperature includes:

[0102] When the outdoor ambient temperature is lower than the first preset temperature, the cooling supply path between the second cooling end 40 and the first cooling end 30 is disconnected.

[0103] When the outdoor ambient temperature is greater than or equal to the first preset temperature, the connection of the supplemental cooling path between the second cooling end 40 and the first cooling end 30 is controlled.

[0104] For example, the connection and disconnection of the supplementary cooling path between the second cooling end 40 and the first cooling end 30 can be controlled by a control valve assembly. When the outdoor ambient temperature is lower than the first preset temperature, the first operating mode is adopted, the control valve assembly is closed, and the supplementary cooling path between the second cooling end 40 and the first cooling end 30 is disconnected. Natural cooling is adopted, utilizing the circulation of coolant in the first cooling system 10 to exchange heat with the cool outdoor air, and then the temperature of the first cooling end 30 is reduced through the first heat exchanger 12 to meet the cooling requirements of the first cooling end 30. When the outdoor ambient temperature is greater than or equal to the first preset temperature, the outdoor air is insufficient to cool the first cooling system 10. The control valve assembly is opened, and the supplementary cooling path between the second cooling end 40 and the first cooling end 30 is opened. The second cooling end 40 supplements the cooling of the first cooling end 30, reducing its temperature to meet the cooling requirements of the first cooling end 30. By controlling the connection and disconnection of the supplementary cooling path between the second cooling end 40 and the first cooling end 30 according to the relationship between the outdoor ambient temperature and the first preset temperature, the temperature of the first cooling end 30 is adjusted to cool the target scene. This can maintain stable cooling of the target scene under different outdoor ambient temperatures, and save energy while effectively utilizing the outdoor ambient temperature.

[0105] refer to Figures 3-4 According to some embodiments of the present invention, the chiller unit 100 is a chiller unit 100 according to the first aspect of the present invention, which controls the conduction of the supplementary cooling path between the second cooling end 40 and the first cooling end 30 when the outdoor ambient temperature is greater than or equal to a first preset temperature, including:

[0106] When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than the second preset temperature, the first cooling supply path 541 is turned on and the second cooling supply path 542 is turned off, and the second preset temperature is greater than the first preset temperature.

[0107] When the outdoor ambient temperature is greater than or equal to the second preset temperature, the second cooling replenishment path 542 is turned on and the first cooling replenishment path 541 is turned off.

[0108] For example, the on / off state of the supplemental cooling path between the second cooling end 40 and the first cooling end 30 can be controlled by a control valve assembly. When the outdoor ambient temperature is greater than or equal to the first preset temperature but less than the second preset temperature, the second working mode is adopted. The outdoor ambient temperature and the first cooling system 10 are insufficient to meet the cooling water requirements of the first cooling end 30. At this time, the second control valve 511 is opened and the third control valve 512 is closed. The first supplementary cooling flow path 541 is opened and the second supplementary cooling flow path 542 is closed. The cooling water in the second return water pipe 42, which has a higher temperature than the second outlet water pipe 41, is used to supplement the cooling of the first cooling end 30 to meet the corresponding cooling requirements of the first cooling end 30. When the outdoor ambient temperature is greater than or equal to the second preset temperature, the third working mode is adopted. The outdoor ambient temperature further increases. At this time, the third control valve 512 is opened and the second control valve 511 is closed. The second supplementary cooling flow path 542 is opened and the first supplementary cooling flow path 541 is closed. The cooling water in the second outlet water pipe 41, which has a lower temperature than the second return water pipe 42, is used to supplement the cooling of the first cooling end 30 to meet the corresponding cooling requirements of the first cooling end 30. By controlling the selection of either the first cooling supply path 541 or the second cooling supply path 542 to provide supplemental cooling to the first cooling end 30 based on the relationship between the outdoor ambient temperature and the first preset temperature and the second preset temperature, the first cooling end 30 can continuously provide cooling to the target environment even when the outdoor ambient temperature is different. By selecting cooling water from different locations of the second cooling end 40 to provide supplemental cooling to the first cooling end 30, energy consumption is further saved, the waste of cooling water in the second cooling end 40 is reduced, and the condensation caused by the low temperature of the cooling water in the second cooling end 40 is also reduced.

[0109] The following is for reference. Figures 1-4 A chiller unit 100 according to some embodiments of the present invention is described.

[0110] In this embodiment, reference Figure 1 The chiller unit 100 includes a first cooling system 10, a second cooling system 20, a first cooling end 30, a second cooling end 40, a supplementary cooling system 50, a heat dissipation pipeline 60, a spray system 70, and an outdoor fan 80.

[0111] The first cooling system 10 includes a circulating pump 11, a first heat exchanger 12, and a second heat exchanger 13. The circulating pump 11, the first heat exchanger 12, and the second heat exchanger 13 are connected in sequence to form a first circulation path 14 for the circulation of coolant. The second heat exchanger 13 is located outdoors and is used for heat exchange with outdoor air.

[0112] The second cooling system 20 includes a compressor 21, a condenser 22, a throttling device 23, and an evaporator 24. The compressor 21, condenser 22, throttling device 23, and evaporator 24 are connected in sequence to form a second circulation path 25 for refrigerant circulation. A second cooling supply end 40 is connected to the evaporator 24, which supplies cooling capacity to the second cooling supply end 40.

[0113] The first cooling end 30 is connected to the first heat exchanger 12, which supplies cooling capacity to the first cooling end 30. The first cooling end 30 includes a first outlet water pipe 31 and a first return water pipe 32. Water flowing into the first return water pipe 32 exchanges heat with the first heat exchanger 12 and then flows into the first outlet water pipe. The first heat exchanger 12 has a first heat exchange channel 121 and a second heat exchange channel 122 that are isolated from each other and exchange heat with each other. The first heat exchange channel 121 connects the circulating pump 11 and the second heat exchanger 13, and the second heat exchange channel 122 connects the first outlet water pipe 31 and the first return water pipe 32.

[0114] The second cooling end 40 includes a second outlet water pipe 41 and a second return water pipe 42. Water flowing into the second return water pipe 42 exchanges heat with the evaporator 24 and then flows into the second outlet water pipe. The evaporator 24 has a third heat exchange channel 241 and a fourth heat exchange channel 242 that are isolated from each other but exchange heat with each other. The third heat exchange channel 241 connects the throttling component 23 and the compressor 21, and the fourth heat exchange channel 242 connects the second outlet water pipe 41 and the second return water pipe 42.

[0115] The supplementary cooling system 50 includes a control valve assembly, a supplementary cooling pipeline 52, and a supplementary cooling heat exchanger 55. The supplementary cooling system 50 is connected to both the first cooling end 30 and the second cooling end 40, and is used to transfer part of the cooling capacity of the second cooling end 40 to the first cooling end 30.

[0116] The control valve assembly includes a second control valve 511 and a third control valve 512. The second control valve 511 is located in the first connecting pipe 523 to control the opening and closing of the first supplementary cooling flow path 541, and the third control valve 512 is located in the third connecting pipe 525 to control the opening and closing of the second supplementary cooling flow path 542.

[0117] The cooling supply pipe 52 includes an inlet end 521 and an outlet end 522. The inlet end 521 can be selectively connected to the second outlet water pipe 41 or the second return water pipe 42, and the outlet end 522 can be selectively connected to the second outlet water pipe 41 or the second return water pipe 42 to form a cooling supply flow path 54. The cooling supply flow path 54 includes a first cooling supply flow path 541 and a second cooling supply flow path 542. The cooling supply pipe 52 is connected to the first outlet water pipe 31 to supplement the cooling capacity of the first outlet water pipe 31. Specifically, the inlet end 521 is connected to the second return water pipe 42 via the first connecting pipe 523, and the outlet end 522 is connected to the second return water pipe 42 via the second connecting pipe 524, forming the first make-up cooling flow path 541. The inlet end 521 is connected to the second outlet water pipe 41 via the third connecting pipe 525, and the outlet end 522 is connected to the second outlet water pipe 41 via the fourth connecting pipe 526, forming the second make-up cooling flow path 542. The connection position between the inlet end 521 and the second return water pipe 42 is the first connection position 527, and the connection position between the outlet end 522 and the second return water pipe 42 is the second connection position 528. In the water flow direction within the second return water pipe 42, the second connection position 528 is located downstream of the first connection position 527. The connection position between the inlet end 521 and the second outlet pipe 41 is the third connection position 529, and the connection position between the outlet end 522 and the second outlet pipe 41 is the fourth connection position 530. In the direction of water flow in the second outlet pipe 41, the fourth connection position 530 is located downstream of the third connection position 529.

[0118] The cooling heat exchanger 55 has a fifth heat exchange channel 551 and a sixth heat exchange channel 552 that are isolated from each other but exchange heat with each other. The fifth heat exchange channel 551 is connected in series with the cooling pipe 52, and the sixth heat exchange channel 552 is connected in series with the first water outlet pipe 31.

[0119] The cooling pipe 60 has an inlet end 61 and an outlet end 62 at its two ends, both connected to the first circulation path 14. The cooling pipe 60 is connected to the condenser 22, which contains a seventh heat exchange channel 221 and an eighth heat exchange channel 222 that are isolated from each other but exchange heat. The seventh heat exchange channel 221 connects the compressor 21 to the throttling component 23, and the eighth heat exchange channel 222 is connected in series to the cooling pipe 60. The cooling pipe 60 is used to introduce coolant from the first circulation path 14 into the cooling pipe 60 to dissipate heat from the condenser 22. The inlet end 61 is connected to the downstream side of the first heat exchanger 12, and the outlet end 62 is connected to the inlet of the second heat exchanger 13.

[0120] The spray system 70 is used to spray cooling water onto the second heat exchanger 13, and the outdoor fan 80 is located outdoors and is used to dissipate heat from the second heat exchanger 13.

[0121] refer to Figure 2When the outdoor ambient temperature is lower than the first preset temperature, the control valve assembly is closed to disconnect the supplementary cooling path between the second cooling end 40 and the first cooling end 30. Natural cooling is adopted, and the circulation of coolant in the first cooling system 10 is used to exchange heat with the cold outdoor air at a lower temperature. Then, the temperature of the first cooling end 30 is reduced through the first heat exchanger 12 to meet the cooling requirements of the first cooling end 30.

[0122] refer to Figure 3 When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than the second preset temperature, the outdoor ambient temperature and the first cooling system 10 are insufficient to meet the cooling water requirements of the first cooling end 30. At this time, the second control valve 511 is opened and the third control valve 512 is closed, the first supplementary cooling flow path 541 is opened and the second supplementary cooling flow path 542 is closed. The cooling water in the second return water pipe 42, which has a higher temperature than the second outlet water pipe 41, is used to supplement the cooling of the first cooling end 30 to meet the cooling requirements of the first cooling end 30.

[0123] refer to Figure 4 When the outdoor ambient temperature is greater than or equal to the second preset temperature, the outdoor ambient temperature rises further. At this time, the third control valve 512 is opened and the second control valve 511 is closed. The second cooling replenishment flow path 542 is opened and the first cooling replenishment flow path 541 is closed. The cooling water in the second outlet water pipe 41, which has a lower temperature than the second return water pipe 42, is used to replenish the first cooling supply end 30 to meet the cooling demand of the first cooling supply end 30.

[0124] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0125] In the description of this invention, "a plurality of" means two or more.

[0126] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0127] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water chiller unit, characterized in that, include: The first cooling system includes a circulating pump, a first heat exchanger, and a second heat exchanger. The circulating pump, the first heat exchanger, and the second heat exchanger are connected in sequence to form a first circulating flow path for the circulation of coolant. The second heat exchanger is located outdoors and is used for heat exchange with outdoor air. The second cooling system includes a compressor, a condenser, a throttling device, and an evaporator. The compressor, the condenser, the throttling device, and the evaporator are connected in sequence to form a second circulation path for refrigerant circulation. The first cooling end is connected to the first heat exchanger, and the first heat exchanger is used to supply cooling capacity to the first cooling end; The second cooling supply end is connected to the evaporator, which is used to supply cooling capacity to the second cooling supply end.

2. The chiller unit according to claim 1, characterized in that, The first cooling end includes a first outlet water pipe and a first return water pipe. Water flowing into the first return water pipe exchanges heat with the first heat exchanger and then flows into the first outlet water pipe. The second cooling end includes a second outlet water pipe and a second return water pipe. Water flowing into the second return water pipe exchanges heat with the evaporator and then flows into the second outlet water pipe.

3. The chiller unit according to claim 2, characterized in that, The first heat exchanger has a first heat exchange channel and a second heat exchange channel that are isolated from each other and exchange heat with each other. The first heat exchange channel connects the circulating pump and the second heat exchanger, and the second heat exchange channel connects the first outlet water pipe and the first return water pipe. And / or, the evaporator has a third heat exchange channel and a fourth heat exchange channel that are isolated from each other and exchange heat with each other, the third heat exchange channel connecting the throttling component and the compressor, and the fourth heat exchange channel connecting the second outlet water pipe and the second return water pipe.

4. The chiller unit according to claim 1, characterized in that, It includes a supplemental cooling system, which is connected to both the first cooling end and the second cooling end, and is used to transfer a portion of the cooling capacity from the second cooling end to the first cooling end.

5. The chiller unit according to claim 4, characterized in that, The cooling replenishment system includes a control valve assembly, which is used to control the opening and closing of the cooling replenishment path between the second cooling supply end and the first cooling supply end.

6. The chiller unit according to claim 4, characterized in that, The first cooling end includes a first outlet water pipe and a first return water pipe. Water flowing into the first return water pipe exchanges heat with the first heat exchanger and then flows into the first outlet water pipe. The second cooling end includes a second outlet water pipe and a second return water pipe. Water flowing into the second return water pipe exchanges heat with the evaporator and then flows into the second outlet water pipe. The cooling replenishment system includes a cooling replenishment pipeline, which has an inlet end and an outlet end. The inlet end is connected to the second water outlet pipeline or the second water return pipeline, and the outlet end is connected to the second water outlet pipeline or the second water return pipeline to form a cooling replenishment flow path. The cooling replenishment pipeline is connected to the first water outlet pipeline to replenish the cooling capacity of the first water outlet pipeline.

7. The chiller unit according to claim 6, characterized in that, The cooling replenishment path includes a first cooling replenishment path and / or a second cooling replenishment path; The inlet end is connected to the second return water pipe through a first connecting pipe, and the outlet end is connected to the second return water pipe through a second connecting pipe to form the first cooling replenishment flow path; The inlet end is connected to the second outlet water pipe through a third connecting pipe, and the outlet end is connected to the second outlet water pipe through a fourth connecting pipe to form the second make-up cooling flow path.

8. The chiller unit according to claim 7, characterized in that, The cooling system includes a control valve assembly, which includes a second control valve and / or a third control valve. The second control valve is located in the first connecting pipe or the second connecting pipe to control the opening and closing of the first cooling flow path. The third control valve is located in the third or fourth connecting pipe to control the on / off state of the second cooling supply path.

9. The chiller unit according to claim 7, characterized in that, The connection position between the inlet end and the second return water pipe is the first connection position, and the connection position between the outlet end and the second return water pipe is the second connection position. In the direction of water flow in the second return water pipe, the second connection position is located downstream of the first connection position. And / or, the connection position between the inlet end and the second outlet pipe is the third connection position, and the connection position between the outlet end and the second outlet pipe is the fourth connection position. In the direction of water flow in the second outlet pipe, the fourth connection position is located downstream of the third connection position.

10. The chiller unit according to claim 6, characterized in that, The cooling system includes a cooling heat exchanger, which has a fifth heat exchange channel and a sixth heat exchange channel that are isolated from each other but exchange heat with each other. The fifth heat exchange channel is connected in series with the cooling pipeline, and the sixth heat exchange channel is connected in series with the first outlet water pipeline.

11. The chiller unit according to claim 1, characterized in that, include: The cooling pipe has an inlet and an outlet at its two ends, both of which are connected to the first circulation path. The cooling pipe is connected to the condenser and is used to introduce coolant from the first circulation path into the cooling pipe to dissipate heat from the condenser.

12. The chiller unit according to claim 11, characterized in that, The liquid inlet is connected to the downstream side of the first heat exchanger, and the liquid outlet is connected to the inlet of the second heat exchanger.

13. The chiller unit according to claim 11, characterized in that, The condenser has a seventh heat exchange channel and an eighth heat exchange channel that are isolated from each other but exchange heat with each other. The seventh heat exchange channel connects the compressor and the throttling component, and the eighth heat exchange channel is connected in series with the heat dissipation pipe.

14. The chiller unit according to any one of claims 1-13, characterized in that, The chiller unit includes a spray system for spraying cooling water onto the second heat exchanger; And / or, the chiller unit includes an outdoor fan located outdoors and used to dissipate heat from the second heat exchanger.

15. A control method for a chiller unit, characterized in that, The chiller unit is the chiller unit according to claim 4, and the control method of the chiller unit includes: The on / off state of the supplemental cooling path between the second cooling end and the first cooling end is controlled according to the outdoor ambient temperature.

16. The control method for a chiller unit according to claim 15, characterized in that, Based on the outdoor ambient temperature, control the on / off state of the cooling supply path between the second cooling terminal and the first cooling terminal, including: When the outdoor ambient temperature is lower than the first preset temperature, the cooling supply path between the second cooling end and the first cooling end is disconnected. When the outdoor ambient temperature is greater than or equal to the first preset temperature, the connection of the supplemental cooling path between the second cooling end and the first cooling end is controlled.

17. The control method for a chiller unit according to claim 16, characterized in that, The chiller unit is the chiller unit according to claim 7, which, when the outdoor ambient temperature is greater than or equal to a first preset temperature, controls the connection of the supplementary cooling path between the second cooling end and the first cooling end, including: When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than the second preset temperature, the first cooling replenishment path is controlled to be turned on and the second cooling replenishment path is controlled to be turned off, and the second preset temperature is greater than the first preset temperature. When the outdoor ambient temperature is greater than or equal to the second preset temperature, the second cooling replenishment path is turned on and the first cooling replenishment path is turned off.

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