Water chilling unit

Abstract

The invention discloses a water chilling unit. The water chilling unit comprises a first cooling system, a spraying system and a second cooling system. The first cooling system comprises a circulating pump, a first heat exchanger and a second heat exchanger, the spraying system comprises a water storage tank, a water pump and a spraying part, the water storage tank, the water pump and the spraying part are sequentially connected to form a spraying flow path, the spraying part is used for spraying water to the second heat exchanger, and the second cooling system comprises a compressor, a condenser, a throttling part and an evaporator. A first heat exchange flow channel, a second heat exchange flow channel and a third heat exchange flow channel which are separated from one another are formed in the condenser, and the second heat exchange flow channel and the third heat exchange flow channel exchange heat with the first heat exchange flow channel. According to the water chilling unit provided by the embodiment of the invention, the airflow flowing resistance can be reduced, the power consumption of the indoor fan or the outdoor fan is reduced, and the energy efficiency of the water chilling unit is improved.

Description

Technical Field

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

[0002] Chillers are typically used for temperature control in industrial settings or large spaces, such as data center server rooms. However, in related technologies, chillers utilize dry air energy for cooling. Outdoor and indoor air flow through a heat exchange core, where indirect heat exchange occurs, allowing outdoor air to cool the indoor air and thus cooling the heat source. However, the airflow resistance through the heat exchange core is significant, reducing the chiller's energy efficiency. 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. Therefore, one object of the present invention is to provide a chiller unit that can reduce airflow resistance, reduce the power consumption of indoor or outdoor fans, and improve the energy efficiency of the cooling unit.

[0004] A chiller unit according to an embodiment of the present invention 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 circulating flow path for circulating coolant, the second heat exchanger being located outdoors and used for heat exchange with outdoor air, the first cooling system further comprising a first bypass pipe connected to the first circulating flow path; and a spraying system comprising a water storage tank, a water pump, and a spraying component, wherein the water storage tank, the water pump, and the spraying component are sequentially connected to form a spraying flow path, the spraying component being used to spray water onto the second heat exchanger, and the spraying system including a second bypass. The second bypass pipeline is connected to the spray flow path; the second cooling system includes 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 for refrigerant circulation. The condenser has a first heat exchange channel, a second heat exchange channel, and a third heat exchange channel that are separated from each other. The second heat exchange channel and the third heat exchange channel exchange heat with the first heat exchange channel. The first heat exchange channel constitutes part of the second circulation flow path, the second heat exchange channel constitutes part of the first bypass pipeline, and the third heat exchange channel constitutes part of the second bypass pipeline.

[0005] According to an embodiment of the present invention, a chiller unit is provided with a first cooling system in which the coolant in the first circulation path of the first cooling system exchanges heat with the outdoor air in a first heat exchanger to bring outdoor cooling into the room. This eliminates the need for a heat exchange core to exchange heat between the outdoor and indoor air, reducing airflow resistance and power consumption of the outdoor or indoor fan, thus improving the chiller unit's energy efficiency. Furthermore, by forming heat exchange channels that are mutually isolated and exchange heat with each other in the condenser, and by including a first bypass pipe in the first cooling system, the first bypass pipe introduces the coolant in the first circulation path into the condenser to dissipate heat from the refrigerant flowing through the condenser in the second circulation path. Since the airflow driven by the outdoor fan does not need to pass through the condenser, the power consumption of the outdoor fan can be further reduced, thereby further improving the chiller unit's energy efficiency.

[0006] Furthermore, by including a second bypass pipe in the spray system, the water in the spray flow path can be introduced into the condenser to dissipate heat from the refrigerant flowing through the condenser in the second circulation flow path. In this way, by setting up two independent cooling channels (i.e., the first bypass pipe and the second bypass pipe) to dissipate heat from the refrigerant flowing through the condenser in the second circulation flow path, compared to setting up a single cooling channel, even if one cooling channel fails, the other cooling channel can still dissipate heat from the refrigerant flowing through the condenser in the second circulation flow path. This allows the second cooling system to operate normally, improving the chiller's ability to withstand failure risks and the system reliability.

[0007] According to some embodiments of the present invention, the condenser is a plate heat exchanger.

[0008] According to some embodiments of the present invention, a first control valve is provided on the second bypass pipeline, and the first control valve is used to control the opening and closing of the second bypass pipeline.

[0009] According to some embodiments of the present invention, the outlet of the water pump is connected to the spraying component via a first connecting pipe, and a second control valve is provided on the first connecting pipe for controlling the opening and closing of the first connecting pipe.

[0010] According to some embodiments of the present invention, the outlet of the water pump is connected to the spray component via a first connecting pipe, the second bypass pipe includes a first connecting pipe section, one end of the first connecting pipe section is connected to the first connecting pipe and the other end of the first connecting pipe section is connected to the inlet of the third heat exchange channel, and the first control valve is disposed on the first connecting pipe section.

[0011] According to some embodiments of the present invention, the second bypass pipeline includes a second connecting pipe section, one end of which is connected to the first connecting pipeline and the other end of which is connected to the outlet of the third heat exchange channel. The second connecting pipe section is provided with a one-way valve, which is unidirectionally open in the direction from the outlet of the third heat exchange channel to the first connecting pipeline.

[0012] According to some embodiments of the present invention, the connection position between the first connecting pipe segment and the first connecting pipe is the first connection position, and the connection position between the second connecting pipe segment and the first connecting pipe is the second connection position. In the direction of water flow in the first connecting pipe, the second connection position is located downstream of the first connection position.

[0013] According to some embodiments of the present invention, the outlet of the water pump is connected to the spraying component via a first connecting pipe, and a second control valve is provided on the first connecting pipe. The second control valve is used to control the opening and closing of the first connecting pipe and is located between the first connection position and the second connection position.

[0014] According to some embodiments of the present invention, a third control valve is provided on the first bypass pipeline, the third control valve being used to control the opening and closing of the first bypass pipeline.

[0015] According to some embodiments of the present invention, the outlet end of the first heat exchanger is connected to the inlet end of the second heat exchanger via a second connecting pipe, and the inlet end of the first bypass pipe is connected to the second connecting pipe.

[0016] According to some embodiments of the present invention, the second connecting pipe includes a third connecting pipe section, the third connecting pipe section connecting the inlet end of the first bypass pipe to the inlet end of the second heat exchanger, and the third connecting pipe section is provided with a fourth control valve for controlling the on / off state of the third connecting pipe section.

[0017] According to some embodiments of the present invention, the outlet end of the first bypass pipe is connected to the inlet end of the second heat exchanger.

[0018] According to some embodiments of the present invention, the chiller unit includes a drain pipe connected to the condenser and communicating with the third heat exchange channel, and the drain pipe is provided with a drain valve for controlling the on / off state of the drain pipe.

[0019] According to some embodiments of the present invention, the drain pipe is connected to the bottom of the condenser.

[0020] According to some embodiments of the present invention, the chiller unit includes an indoor fan, which is located indoors and is used to drive indoor air to flow through the first heat exchanger or through the first heat exchanger and the evaporator;

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

[0022] According to some embodiments of the present invention, the chiller unit has a natural cooling mode, a mixed cooling mode, and a dry cooling fault mode;

[0023] In the natural cooling mode, the circulation pump is turned on and the compressor is turned off, and both the first bypass line and the second bypass line are disconnected;

[0024] In the hybrid cooling mode, both the circulation pump and the compressor are turned on, the first bypass line is open and the second bypass line is closed;

[0025] In the dry-cooling fault mode, if the first circulation path fails, the compressor starts, the first bypass line is disconnected, and the second bypass line is connected.

[0026] 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

[0027] 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:

[0028] Figure 1 This is a simplified schematic diagram of a chiller unit according to some embodiments of the present invention;

[0029] Figure 2 yes Figure 1 A schematic diagram of the chiller unit in natural cooling mode;

[0030] Figure 3 yes Figure 1 A schematic diagram of the chiller unit in mixed cooling mode;

[0031] Figure 4 yes Figure 1 A schematic diagram of a chiller unit in a dry-cooling fault mode.

[0032] Figure label:

[0033] 100. Chiller unit;

[0034] 10. First cooling system; 11. Circulating pump; 12. First heat exchanger; 13. Second heat exchanger; 14. First circulating flow path; 15. First bypass line; 151. Third control valve; 16a. Second connecting line; 16. Third connecting pipe section; 161. Fourth control valve;

[0035] 20. Second cooling system; 21. Compressor; 22. Condenser; 221. First heat exchange channel; 222. Second heat exchange channel; 223. Third heat exchange channel; 23. Throttling component; 24. Evaporator; 25. Second circulation path;

[0036] 30. Sprinkler system; 31. Water tank; 32. Water pump; 33. Sprinkler components; 34. Sprinkler flow path; 35. First connecting pipe; 351. Second control valve; 352. First connection position; 353. Second connection position; 36. Second bypass pipe; 361. First control valve; 362. First connecting pipe section; 363. Second connecting pipe section; 364. Check valve;

[0037] 40. Drainage pipes;

[0038] 50. Indoor fan;

[0039] 60. Outdoor fan. Detailed Implementation

[0040] 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.

[0041] The following is for reference. Figures 1-4 A chiller unit 100 according to an embodiment of the present invention is described.

[0042] refer to Figure 1 According to an embodiment of the present invention, a chiller unit 100 includes: a first cooling system 10, a spray system 30, and a second cooling system 20.

[0043] 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. The circulating pump 11 drives the coolant to circulate within the first cooling system 10. The first heat exchanger 12 and the second heat exchanger 13 exchange heat between the coolant and indoor or outdoor air through heat transfer. When the first circulation path 14 is operating, the coolant flowing through the second heat exchanger 13 can exchange heat with the outdoor air, absorbing the cold air from outside. The coolant after absorbing the cold air flows into the first heat exchanger 12, which cools the indoor air; for example, the first heat exchanger 12 can exchange heat with the indoor air to lower the indoor air temperature.

[0044] For example, when the coolant circulates to the second heat exchanger 13 under the action of the circulating pump 11, it exchanges heat with the outdoor air, causing the coolant temperature to drop. When the coolant circulates to the first heat exchanger 12 under the action of the circulating pump 11, it exchanges heat with the indoor air, causing the indoor air temperature to drop and the coolant temperature to rise. The cooled coolant continues to flow to the second heat exchanger 13 under the action of the circulating pump 11, exchanges heat with the outdoor air, causing the coolant temperature to drop, and then circulates in the first circulation path 14 to achieve the purpose of cooling the target environment.

[0045] For example, the coolant in the first cooling system 10 can be an ethylene glycol solution, the first heat exchanger 12 can be a tube-fin heat exchanger or a microchannel heat exchanger, and the second heat exchanger 13 can be a tube-fin heat exchanger or a microchannel heat exchanger.

[0046] The first cooling system 10 also includes a first bypass pipe 15, which is connected to the first circulation path 14, allowing coolant in the first circulation path 14 to flow into the first bypass pipe 15. The first bypass pipe 15 can be opened or closed as needed.

[0047] The spray system 30 includes a water storage tank 31, a water pump 32, and a spray component 33. The water storage tank 31, water pump 32, and spray component 33 are connected sequentially to form a spray flow path 34. The spray component 33 sprays water onto the second heat exchanger 13. The spray system 30 includes a second bypass pipe 36, which is connected to the spray flow path 34. For example, a portion of the spray water sprayed onto the second heat exchanger 13 evaporates and absorbs heat, while the unevaporated spray water can flow back into the water storage tank 31. By using the spray system 30 to spray cooling water onto the second heat exchanger 13, the temperature of the second heat exchanger 13 can be reduced by the evaporation and heat absorption of the cooling water, further reducing the temperature of the coolant in the second heat exchanger 13, thereby improving the working efficiency of the first cooling system 10. Water from the spray flow path 34 can flow into the second bypass pipe 36, which can be opened or closed as needed.

[0048] The second cooling system 20 includes a compressor 21, a condenser 22, a throttling component 23, and an evaporator 24. The compressor 21, condenser 22, throttling component 23, and evaporator 24 are connected in sequence to form a second circulation path 25 for refrigerant circulation. The condenser 22 has a first heat exchange channel 221, a second heat exchange channel 222, and a third heat exchange channel 223 that are separated from each other. The second heat exchange channel 222 and the third heat exchange channel 223 exchange heat with the first heat exchange channel 221. The first heat exchange channel 221 forms part of the second circulation path 25, the second heat exchange channel 222 forms part of the first bypass pipe 15, and the third heat exchange channel 223 forms part of the second bypass pipe 36. For example, the condenser 22 can be a tube-fin heat exchanger or a microchannel heat exchanger. When the compressor 21 of the second cooling system 20 is working, the compressor 21 discharges the compressed refrigerant to the condenser 22. The refrigerant flowing through the condenser 22 is throttled and depressurized by the throttling component 23, and then flows through the evaporator 24. The refrigerant flowing through the evaporator 24 flows back into the compressor 21 and is compressed again. In this process, the cooling capacity generated by the evaporator 24 can be transferred to the target environment for cooling.

[0049] The first cooling system 10 transfers the cooling energy from the outdoor environment to the target environment through the first heat exchanger 12, 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 target environment, using mechanical cooling. For example, when this chiller unit 100 is used in a data center server room, the first cooling system 10 can provide the outdoor cooling energy to the server room space, thereby lowering the temperature of the entire server room. When the natural cooling method is insufficient to supply cooling energy to the server room, the second cooling system 20 can be activated, and the cooling energy of the second cooling system 20 can be provided to the server room through the evaporator 24 to meet the cooling needs of the server room, so that the temperature of the server room space can reach the required cooling level.

[0050] In the natural cooling mode, by exchanging heat between the coolant in the first circulation path 14 and the outdoor air in the first heat exchanger 12, there is no need to set up a heat exchange core to exchange heat between the outdoor air and the indoor air. This can reduce the resistance of airflow, reduce the power consumption of the outdoor fan 60 or the indoor fan 50, and improve the energy efficiency of the chiller unit 100.

[0051] When the second cooling system 20 is supplying cooling, the compressor 21 is working, and the coolant in the first circulation path 14 can flow through the condenser 22 through the first bypass pipe 15. The coolant in the first bypass pipe 15 exchanges heat with the refrigerant flowing through the condenser 22 in the second circulation path 25 and then flows back into the first circulation path 14.

[0052] By further including a first bypass pipe 15 in the first cooling system 10, the first bypass pipe 15 introduces the coolant in the first circulation path 14 into the condenser 22 to dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation path 25. Since the airflow driven by the outdoor fan 60 does not need to pass through the condenser 22, the power consumption of the outdoor fan 60 can be further reduced, thereby further improving the energy efficiency of the chiller unit 100.

[0053] Furthermore, by including a second bypass pipe 36 in the spray system 30, the second bypass pipe 36 can introduce water from the spray flow path 34 into the condenser 22 to dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation flow path 25. In this way, by setting up two independent cooling channels (i.e., the first bypass pipe 15 and the second bypass pipe 36) to dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation flow path 25, compared to setting up a single cooling channel, even if one cooling channel fails, the other cooling channel can still dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation flow path 25. This allows the second cooling system 20 to operate normally, improving the fault resistance and system reliability of the chiller unit 100.

[0054] According to an embodiment of the present invention, the chiller unit 100, by setting up a first cooling system 10 and allowing the coolant in the first circulation path 14 of the first cooling system 10 to exchange heat with the outdoor air in the first heat exchanger 12, brings outdoor cooling into the room. This eliminates the need for a heat exchange core to exchange heat between the outdoor and indoor air, reducing airflow resistance and lowering the power consumption of the outdoor fan 60 or indoor fan 50, thus improving the energy efficiency of the chiller unit 100. Furthermore, by forming heat exchange channels in the condenser 22 that are mutually isolated and exchange heat, and by further including a first bypass pipe 15 in the first cooling system 10, the first bypass pipe 15 introduces the coolant in the first circulation path 14 into the condenser 22 to dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation path 25. Since the airflow driven by the outdoor fan 60 does not need to pass through the condenser 22, the power consumption of the outdoor fan 60 can be further reduced, thereby further improving the energy efficiency of the chiller unit 100.

[0055] Furthermore, by including a second bypass pipe 36 in the spray system 30, the second bypass pipe 36 can introduce water from the spray flow path 34 into the condenser 22 to dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation flow path 25. In this way, by setting up two independent cooling channels (i.e., the first bypass pipe 15 and the second bypass pipe 36) to dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation flow path 25, compared to setting up a single cooling channel, even if one cooling channel fails, the other cooling channel can still dissipate heat from the refrigerant flowing through the condenser 22 in the second circulation flow path 25. This allows the second cooling system 20 to operate normally, improving the fault resistance and system reliability of the chiller unit 100.

[0056] refer to Figure 1 According to some embodiments of the present invention, the condenser 22 is a plate heat exchanger. Plate heat exchangers have a simple structure and are easy to manufacture into multiple independent heat exchange channels.

[0057] refer to Figure 1 According to some embodiments of the present invention, a first control valve 361 is provided on the second bypass pipe 36, which is used to control the opening and closing of the second bypass pipe 36. For example, when the first control valve 361 is open, the second bypass pipe 36 is open, and the spray water in the spray flow path 34 can flow through the second bypass pipe 36 for circulation; when the first control valve 361 is closed, the second bypass pipe 36 is closed. By providing a first control valve 361 on the second bypass pipe 36, the first control valve 361 can be opened or closed according to the actual situation to determine whether the second bypass pipe 36 is open to dissipate heat for the refrigerant in the condenser 22.

[0058] For example, when compressor 21 is operating and the first cooling system 10 is working normally, the refrigerant flowing through the first bypass pipe 15 can dissipate heat from the refrigerant flowing through the condenser 22. At this time, the first control valve 361 can be closed, causing the second bypass pipe 36 to disconnect. When compressor 21 is operating and the first cooling system 10 malfunctions, the coolant in the first bypass pipe 15 cannot flow, thus failing to dissipate heat from the refrigerant flowing through the condenser 22. At this time, the first control valve 361 can be opened, allowing the second bypass pipe 36 to be opened, thereby introducing water from the spray path 34 into the second bypass pipe 36 to dissipate heat from the refrigerant flowing through the condenser 22, thus ensuring that the second cooling system 20 can work normally. In this way, the heat dissipation requirements of the compressor 21 for the condenser 22 can be met, while also reducing energy consumption.

[0059] refer to Figure 1 According to some embodiments of the present invention, the outlet of the water pump 32 is connected to the spray component 33 via a first connecting pipe 35. A second control valve 351 is provided on the first connecting pipe 35, which is used to control the opening and closing of the first connecting pipe 35. For example, when the second control valve 351 is open, the first connecting pipe 35 is open, and spray water can flow from the water storage tank 31 through the first connecting pipe 35 to the spray component 33 to spray the second heat exchanger 13; when the second control valve 351 is closed and the first control valve 361 is open, the first connecting pipe 35 is closed, the second bypass pipe 36 is open, and spray water can flow from the water storage tank 31 through the second bypass pipe 36 through the condenser 22 to dissipate heat from the condenser 22, and then flow to the spray component 33, where the water can fall back into the water storage tank 31; when both the second control valve 351 and the first control valve 361 are closed, the spray system 30 does not work. By providing a second control valve 351 on the first connecting pipe 35, the second control valve 351 can be opened or closed according to the actual situation to determine whether the first connecting pipe 35 is open, and cooperate with the first control valve 361 to control whether the spray water in the spray flow path 34 can flow directly to the spray component 33, or flow to the condenser 22 first to dissipate heat for the refrigerant in the second cooling system 20, and then flow to the spray component 33.

[0060] When the first cooling system 10 fails, the second control valve 351 can be opened and the first control valve 361 can be closed. When the first cooling system 10 fails, the spray water can flow through the condenser 22 to dissipate heat for the condenser 22 in the second cooling system 20 by closing the second control valve 351 and opening the first control valve 361, thereby improving the resilience of the chiller unit 100 to failure and the reliability of the system.

[0061] refer to Figure 1According to some embodiments of the present invention, the outlet of the water pump 32 is connected to the spray component 33 via a first connecting pipe 35, the second bypass pipe 36 includes a first connecting pipe section 362, one end of the first connecting pipe section 362 is connected to the first connecting pipe 35 and the other end of the first connecting pipe section 362 is connected to the inlet of the third heat exchange channel 223, and a first control valve 361 is provided on the first connecting pipe section 362.

[0062] For example, when the first control valve 361 is open, the first connecting pipe section 362 is open, and the spray water in the spray flow path 34 can circulate through the first connecting pipe section 362 in the second bypass pipe 36. When the first control valve 361 is closed, the first connecting pipe section 362 is disconnected. By providing the first control valve 361 on the first connecting pipe section 362, connecting one end of the first connecting pipe section 362 to the first connecting pipe 35, and connecting the other end of the first connecting pipe section 362 to the inlet of the third heat exchange flow channel 223, when the first cooling system 10 fails, the spray water can flow through the condenser 22 to dissipate heat for the condenser 22 in the second cooling system 20 by closing the second control valve 351 and opening the first control valve 361, thereby improving the resilience of the chiller unit 100 and the reliability of the system cooling.

[0063] refer to Figure 1 According to some embodiments of the present invention, the second bypass pipe 36 includes a second connecting pipe section 363, one end of which is connected to the first connecting pipe 35 and the other end of which is connected to the outlet of the third heat exchange channel 223. The second connecting pipe section 363 is provided with a one-way valve 364, which is unidirectionally open in the direction from the outlet of the third heat exchange channel 223 to the first connecting pipe 35. For example, a one-way valve 364 is provided in the second connecting pipe section 363, which allows the spray water in the first connecting pipe section 362 to return to the spray flow path 34 through the second connecting pipe section 363 after flowing through the condenser 22, but prevents the spray water in the spray flow path 34 from flowing back to the condenser 22 through the second connecting pipe section 363. This prevents the spray water in the spray flow path 34 from flowing back to the condenser 22 from the second connecting pipe section 363 when the first control valve 361 is closed. It also prevents the spray water from entering the second bypass pipe 36 when the second bypass pipe 36 is disconnected and remaining there, and from forming scale in the second bypass pipe 36 and the third heat exchange channel 223 of the condenser 22, which would cause pipe blockage.

[0064] refer to Figure 1 According to some embodiments of the present invention, the connection position between the first connecting pipe segment 362 and the first connecting pipe 35 is the first connection position 352, and the connection position between the second connecting pipe segment 363 and the first connecting pipe 35 is the second connection position 353. In the direction of water flow in the first connecting pipe 35, the second connection position 353 is located downstream of the first connection position 352.

[0065] For example, the spray water flowing through the first connection position 352 in the spray flow path 34 enters the first connection pipe section 362, flows into the third heat exchange channel 223 in the condenser 22, exchanges heat with the refrigerant in the first heat exchange channel 221, and then returns from the second connection pipe section 363 to the second connection position 353 in the spray flow path 34 and continues to flow into the spray component 33. Since the spray water introduced into the third heat exchange channel 223 cools and dissipates heat from the refrigerant in the first heat exchange channel 221, the spray water temperature at the second connection position 353 in the spray flow path 34 will be higher than the spray water temperature at the first connection position 352. If the first connection position 352 is located downstream of the second connection position 353, the cooling water that has exchanged heat with the spray flow path 34 after entering from the first connection position 352 will flow out from the upstream side of the first connection position 352 and then enter the first connecting pipe section 362, which is not conducive to cooling the refrigerant in the first heat exchange channel 221. By positioning the second connection position 353 downstream of the first connection position 352 in the water flow direction within the first connecting pipe 35, it is beneficial for the cooling water introduced from the spray flow path 34 to the second bypass pipe 36 to dissipate heat from the condenser 22.

[0066] refer to Figure 1 According to some embodiments of the present invention, the outlet of the water pump 32 is connected to the spraying component 33 via a first connecting pipe 35. A second control valve 351 is provided on the first connecting pipe 35, which is used to control the opening and closing of the first connecting pipe 35. The second control valve 351 is located between the first connection position 352 and the second connection position 353. For example, when the second control valve 351 is open, the first connecting pipe 35 is open, and spray water can flow from the water storage tank 31 through the first connecting pipe 35 to the spraying component 33 to spray the second heat exchanger 13. When the second control valve 351 is closed, spray water can flow from the first connection position 352 through the first bypass pipe 15 to the second connection position 353, and then to the spraying component 33 to spray the second heat exchanger 13. By positioning the second control valve 351 between the first connection position 352 and the second connection position 353, when the second control valve 351 is disconnected and the first control valve 361 is open, the spray water in the spray flow path 34 can circulate through the first bypass flow path. When the second control valve 351 is open and the first control valve 361 is closed, the spray water can flow from the first connection position 352 to the second connection position 353 through the spray flow path 34, and then flow to the spray component 33 to spray the second heat exchanger 13.

[0067] For example, when the first cooling system 10 is operating normally, the first control valve 361 can be closed and the second control valve 351 can be opened; when the first cooling system 10 malfunctions and the compressor 21 is operating, the second control valve 351 can be closed and the first control valve 361 can be opened, thus opening the second bypass pipe 36. This allows water from the spray flow path 34 to be introduced into the second bypass pipe 36 to dissipate heat from the refrigerant flowing through the condenser 22, thereby ensuring that the second cooling system 20 can operate normally. In this way, the heat dissipation requirements of the compressor 21 for the condenser 22 can be met, while also reducing energy consumption.

[0068] refer to Figure 1 According to some embodiments of the present invention, a third control valve 151 is provided on the first bypass pipe 15, which is used to control the opening and closing of the first bypass pipe 15. For example, when the third control valve 151 is open, the first bypass pipe 15 is open, and coolant can flow from the first circulation path 14 into the first bypass pipe 15, and flow through the second heat exchange channel 222 of the condenser 22 to dissipate heat from the refrigerant in the first heat exchange channel 221; when the third control valve 151 is closed, the first bypass pipe 15 is closed. By providing a third control valve 151 on the first bypass pipe 15 to control the opening and closing of the first bypass pipe 15, the third control valve 151 can be opened or closed according to the actual situation to determine whether the first bypass pipe 15 is open to dissipate heat from the refrigerant in the condenser 22.

[0069] For example, when the compressor 21 is working, the third control valve 151 opens, which can introduce the coolant of the first circulation path 14 into the first bypass pipe 15, thereby dissipating heat from the condenser 22; when the compressor 21 is not working or the first cooling system 10 malfunctions, the third control valve 151 closes to prevent the coolant of the first circulation path 14 from flowing into the first bypass pipe 15 and affecting the working efficiency of the first circulation path 14.

[0070] refer to Figure 1 According to some embodiments of the present invention, the outlet end of the first heat exchanger 12 is connected to the inlet end of the second heat exchanger 13 via a second connecting pipe 16a, and the inlet end of the first bypass pipe 15 is connected to the second connecting pipe 16a. By connecting both the inlet end of the first bypass pipe 15 and the inlet end of the second heat exchanger 13 to the second connecting pipe 16a, and positioning the outlet end of the first heat exchanger 12 upstream of the inlet end of the first bypass pipe 15, the coolant flowing out from the outlet end of the second heat exchanger 13 can be divided into two paths after flowing into the second connecting pipe 16a. One path flows into the first bypass pipe 15 and exchanges heat with the refrigerant flowing through the condenser 22 in the condenser 22, thus dissipating heat for the refrigerant in the condenser 22. The other path enters the second heat exchanger 13 through the inlet end of the second heat exchanger 13 for heat exchange.

[0071] refer to Figure 1 According to some embodiments of the present invention, the second connecting pipe 16a includes a third connecting pipe section 16, which connects the inlet end of the first bypass pipe 15 to the inlet end of the second heat exchanger 13. The third connecting pipe section 16 is provided with a fourth control valve 161 for controlling the opening and closing of the third connecting pipe section 16. For example, when the fourth control valve 161 is open, the third connecting pipe section 16 is open, and the coolant can flow through the third connecting pipe section 16 into the second heat exchanger 13 to exchange heat with the outdoor air. When the fourth control valve 161 is closed and the third control valve 151 is open, the third connecting pipe section 16 is closed, the first bypass pipe 15 is open, and the coolant can flow through the second connecting pipe 16a into the first bypass pipe 15 to dissipate heat from the condenser 22. After dissipating heat from the refrigerant in the condenser 22, the coolant flows into the first circulation path 14.

[0072] For example, when the first cooling system 10 malfunctions, both the third control valve 151 and the fourth control valve 161 are closed. When the first cooling system 10 is operating normally, the fourth control valve 161 is open, and the third control valve 151 is closed. The coolant flowing out of the first heat exchanger 12 flows to the second heat exchanger 13 through the second connecting pipe 16a for circulation. When the compressor 21 is operating and the first cooling system 10 is operating normally, both the fourth control valve 161 and the third control valve 151 are open. A portion of the coolant flowing out of the first heat exchanger 12 can flow to the condenser 22 through the first bypass pipe 15 to dissipate heat for the refrigerant in the second cooling system 20, thereby ensuring that the second cooling system 20 can operate normally. In this way, the heat dissipation requirements of the compressor 21 for the condenser 22 can be met, and energy consumption can be reduced.

[0073] refer to Figure 1 According to some embodiments of the present invention, the outlet end of the first bypass pipe 15 is connected to the inlet end of the second heat exchanger 13. For example, the coolant flowing through the first bypass pipe 15 dissipates heat from the refrigerant in the first heat exchange channel 221, and then flows into the second heat exchanger 13 through the inlet end of the second heat exchanger 13. (See reference...) Figure 1 According to some embodiments of the present invention, the chiller unit 100 includes a drain pipe 40, which is connected to the condenser 22 and communicates with the third heat exchange channel 223. The drain pipe 40 is provided with a drain valve for controlling the opening and closing of the drain pipe 40. For example, when the first control valve 361 is closed and the second bypass pipe 36 is disconnected, the spray water in the second bypass pipe 36 does not flow. At this time, the drain valve can be opened to connect the drain pipe 40, and the spray water in the second bypass pipe 36 flows out through the drain pipe 40, preventing the spray water in the second bypass pipe 36 from scaling inside the pipe and avoiding the solid impurities accumulated by the scale from clogging the third heat exchange channel 223 and causing the condenser 22 to malfunction.

[0074] When the first control valve 361 is open and the second bypass line 36 is connected, the drain valve is closed.

[0075] refer to Figure 1 According to some embodiments of the present invention, the drain pipe 40 is connected to the bottom of the condenser 22. For example, when the drain valve is opened to allow the spray water in the second bypass pipe 36 to be discharged through the drain pipe 40, connecting the drain pipe 40 to the bottom of the condenser 22 facilitates the drainage of the spray water in the third heat exchange channel 223 under the action of gravity, and avoids the solid impurities accumulated by water scale from clogging the third heat exchange channel 223 and causing the condenser 22 to malfunction.

[0076] refer to Figure 1 According to some embodiments of the present invention, the chiller unit 100 includes an indoor fan 50, which is located indoors and is used to drive indoor air to flow through the first heat exchanger 12 or through the first heat exchanger 12 and the evaporator 24. For example, the indoor fan 50 can be used to drive indoor air to flow through the first heat exchanger 12, or it can be used to drive indoor air to flow through the first heat exchanger 12 and the evaporator 24. By driving indoor air to flow through the first heat exchanger 12 or through the first heat exchanger 12 and the evaporator 24, the indoor fan 50 can increase the rate of heat exchange between the first heat exchanger 12 or the air flowing through the first heat exchanger 12 and the evaporator 24 and the indoor air, thereby increasing the cooling rate of the indoor air.

[0077] For example, when the evaporator 24 is a tube-fin heat exchanger or a microchannel heat exchanger, the indoor fan 50 drives the airflow to flow through the first heat exchanger 12 and the evaporator 24. In the flow direction of the airflow driven by the indoor fan 50, the evaporator 24 is located downstream of the first heat exchanger 12. For example, when the evaporator 24 is a plate heat exchanger, the indoor fan 50 drives the airflow to flow through the first heat exchanger 12.

[0078] refer to Figure 1 According to some embodiments of the present invention, the chiller unit 100 includes an outdoor fan 60, which is located outdoors and drives outdoor air to flow through the second heat exchanger 13. The outdoor fan 60 enhances the heat exchange between the second heat exchanger 13 and the outdoor air. For example, when the chiller unit 100 includes a spray system 30, the outdoor fan 60 can also increase the evaporation rate of the sprayed cooling water. By blowing air, the outdoor fan 60 helps dissipate heat from the second heat exchanger 13, 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, causing the cooling water temperature in the second heat exchanger 13 to decrease at a faster rate, thereby improving the operating efficiency of the first cooling system 10.

[0079] refer to Figures 2-4According to some embodiments of the present invention, the chiller unit 100 has a natural cooling mode, a mixed cooling mode, and a dry cooling fault mode.

[0080] In natural cooling mode, the circulation pump 11 is turned on and the compressor 21 is turned off, and both the first bypass line 15 and the second bypass line 36 are disconnected.

[0081] For example, when the outdoor ambient temperature is low, the natural cooling mode can be turned on. At this time, the first control valve 361 and the third control valve 151 are closed, and the fourth control valve 161 is opened. The second control valve 351 can be opened or closed as needed. The circulation of the coolant in the first cooling system 10 is used to exchange heat with the cold outdoor air through the second heat exchanger 13, and then the coolant is allowed to exchange heat with the indoor environment through the first heat exchanger 12 to meet the indoor cooling needs.

[0082] In the mixed cooling mode, both the circulation pump 11 and the compressor 21 are turned on, the first bypass line 15 is open and the second bypass line 36 is closed.

[0083] For example, when the outdoor ambient temperature cannot meet the indoor cooling requirements, a hybrid cooling mode can be activated, with both the first cooling system 10 and the second cooling system 20 operating. These two systems provide cooling capacity to the room, meeting the indoor cooling needs. At this time, the first control valve 361 can be closed, while the second control valve 351, the third control valve 151, and the fourth control valve 161 can be opened. The first bypass pipe 15 is then open, allowing the coolant in the first circulation path 14 to enter the second heat exchange channel 222 of the condenser 22. There, it exchanges heat with the refrigerant in the first heat exchange channel 221, cooling the refrigerant flowing through the condenser 22. Simultaneously, the refrigerant in the second cooling system 20 circulates through the evaporator 24 in the second circulation path 25, exchanging heat with the indoor air. This, combined with the first cooling system 10, cools the indoor environment to meet its cooling requirements.

[0084] In the dry-cooling fault mode, the first circulation path 14 fails, the compressor 21 starts, the first bypass line 15 is disconnected and the second bypass line 36 is connected.

[0085] For example, when the first circulation path 14 malfunctions, the first bypass pipe 15 cannot dissipate heat from the condenser 22, and the dry cooling fault mode can be activated. At this time, the second control valve 351, the third control valve 151, and the fourth control valve 161 are closed, and the first control valve 361 is opened. The second bypass pipe 36 is open, and the spray water from the spray system 30 can enter the third heat exchange channel 223 of the condenser 22 through the second bypass pipe 36 to exchange heat with the refrigerant in the first heat exchange channel 221, thereby cooling the refrigerant flowing through the condenser 22. The circulation of the refrigerant in the second cooling system 20 is used to exchange heat with the indoor air through the evaporator 24 to meet the cooling needs of the indoor environment.

[0086] By selecting natural cooling mode and mixed cooling mode according to the outdoor ambient temperature, the on / off state of the first bypass pipe 15 and the second bypass pipe 36 can be controlled, allowing the first cooling system 10 to cool alone or the first cooling system 10 and the second cooling system 20 to cool together. This can maintain stable cooling supply for the target scenario under different outdoor ambient temperatures, effectively utilizing the outdoor ambient cooling capacity while saving energy. Furthermore, when the first circulation path 14 fails, the dry cooling fault mode allows the second cooling system 20 to operate independently, improving the chiller unit 100's ability to withstand faults.

[0087] According to some embodiments of the present invention, the control method of the chiller unit 100 includes:

[0088] Detect outdoor ambient temperature;

[0089] Based on the current outdoor ambient temperature, control the chiller unit to 100°C.

[0090] Among them, controlling the chiller unit 100 according to the current outdoor ambient temperature includes: determining the relationship between the current outdoor ambient temperature and the first preset temperature and the second preset temperature, wherein the second preset temperature is greater than the first preset temperature;

[0091] When the outdoor ambient temperature is less than or equal to the first preset temperature, the outdoor fan 60, indoor fan 50 and circulation pump 11 are controlled to run, and the compressor 21 is controlled to shut down.

[0092] When the outdoor ambient temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the outdoor fan 60, indoor fan 50, circulating pump 11 and compressor 21 are all controlled to run, and the compressor 21 is controlled to run at the first frequency.

[0093] When the outdoor ambient temperature is higher than the second preset temperature, the outdoor fan 60, indoor fan 50, circulating pump 11 and compressor 21 are all controlled to run, and the compressor 21 is controlled to run at a second frequency, which is higher than the first frequency.

[0094] For example, chiller unit 100 includes a wet bulb and a temperature measuring meter. The wet bulb is placed in the outdoor environment, and the temperature measuring meter measures the temperature of the wet bulb as the outdoor ambient temperature.

[0095] For example, both the first frequency and the second frequency are specific values, where the second frequency is greater than the first frequency.

[0096] For example, the first frequency is a range value, and the second frequency is a range value, where the minimum value in the second frequency range is greater than the maximum value in the first frequency range.

[0097] For example, when the outdoor ambient temperature is less than or equal to a first preset temperature, the outdoor fan 60, indoor fan 50, and circulating pump 11 are controlled to operate, while the compressor 21 is controlled to shut down. The coolant in the first circulating flow path 14 is cooled in the first heat exchanger 12, its temperature rises, it leaves the first heat exchanger 12 and flows through the second heat exchanger 13, where it exchanges heat with the outdoor air to cool down, and then flows back to the first heat exchanger 12 to form a cycle. At this time, the coolant in the first circulating flow path 14 can provide sufficient cooling simply by exchanging heat with the outdoor ambient temperature, thus reducing the electrical energy consumed by the chiller unit 100 while ensuring sufficient cooling capacity.

[0098] For example, when the outdoor ambient temperature is greater than a first preset temperature and less than or equal to a second preset temperature, the outdoor fan 60, indoor fan 50, circulating pump 11, and compressor 21 are all controlled to operate, and compressor 21 is controlled to operate at a first frequency. Part of the coolant flowing out of the outlet of the first heat exchanger 12 enters the first bypass pipe 15, where it exchanges heat with the second circulating flow path 25 in the condenser 22, and then leaves the first bypass pipe 15 to enter the second heat exchanger 13 for heat exchange; the other part enters the second heat exchanger 13 for heat exchange. The coolant in the first circulating flow path 14 cannot provide sufficient cooling simply by exchanging heat with the outdoor ambient temperature. By turning on compressor 21 and making it operate at the first frequency, the cooling capacity can be made more sufficient, improving the cooling capacity of the chiller unit 100 and reducing the electrical energy consumed by the chiller unit 100.

[0099] For example, when the outdoor ambient temperature is higher than the second preset temperature, the outdoor fan 60, indoor fan 50, circulating pump 11, and compressor 21 are all controlled to operate, and compressor 21 is controlled to operate at a second frequency, which is higher than the first frequency. Part of the coolant flowing out of the outlet of the first heat exchanger 12 enters the first bypass pipe 15, where it exchanges heat with the second circulating flow path 25 in the condenser 22, and then leaves the first bypass pipe 15 to enter the second heat exchanger 13 for heat exchange; the other part enters the second heat exchanger 13 for heat exchange. The coolant in the first circulating flow path 14 cannot provide sufficient cooling simply by exchanging heat with the outdoor ambient temperature. By turning on compressor 21 and making it operate at the second frequency, the cooling capacity can be made more sufficient, thus improving the cooling capacity of the chiller unit 100.

[0100] Through the above control method, the compressor 21 can change its operating frequency according to the outdoor ambient temperature. When the outdoor environment is hot, the compressor 21 operates at the first frequency, so that the second circulation path 25 provides sufficient cooling while appropriately reducing the energy consumption of the chiller unit 100. When the outdoor environment is even hotter, the frequency of the compressor 21 is increased, thereby increasing the cooling capacity of the second circulation path 25 and ensuring that the chiller unit 100 has sufficient cooling capacity when the outdoor environment is even hotter.

[0101] According to some embodiments of the present invention, the first frequency is a range value. Controlling the compressor 21 to operate at the first frequency includes: adjusting the frequency of the compressor 21 within the first frequency range based on the temperature difference between the actual supply air temperature and the set supply air temperature. By adjusting the frequency of the compressor 21 within the first frequency range based on the temperature difference between the actual supply air temperature and the set supply air temperature, the chiller unit 100 can provide sufficient cooling effect, and the energy consumed by the compressor 21 can be reduced, thereby reducing the energy consumption of the chiller unit 100.

[0102] According to some embodiments of the present invention, the second frequency is a range value. Controlling the compressor 21 to operate at the second frequency includes: adjusting the frequency of the compressor 21 within the second frequency range based on the temperature difference between the actual supply air temperature and the set supply air temperature. By adjusting the frequency of the compressor 21 within the second frequency range based on the temperature difference between the actual supply air temperature and the set supply air temperature, the chiller unit 100 can provide sufficient cooling effect, and the energy consumed by the compressor 21 can be reduced, thereby reducing the energy consumption of the chiller unit 100.

[0103] According to some embodiments of the present invention, the chiller unit 100 includes a spray system 30, which is used to spray cooling water onto the second heat exchanger 13 or to spray cooling water onto the second heat exchanger 13 and the condenser 22. The chiller unit 100 is controlled according to the current outdoor ambient temperature, and further includes:

[0104] Determine the relationship between the current outdoor ambient temperature and the first preset temperature and the second preset temperature, where the first preset temperature is lower than the second preset temperature;

[0105] When the outdoor ambient temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the outdoor fan 60, indoor fan 50, circulating pump 11 and sprinkler system 30 are controlled to operate, and the compressor 21 is controlled to shut down.

[0106] When the outdoor ambient temperature is less than or equal to the first preset temperature, the outdoor fan 60, indoor fan 50 and circulating pump 11 are controlled to run, while the compressor 21 and spray system 30 are controlled to shut down.

[0107] For example, chiller unit 100 includes a dry bulb and a temperature measuring meter. The dry bulb is placed in the outdoor environment, and the temperature measuring meter measures the temperature of the dry bulb as the outdoor ambient temperature.

[0108] When the outdoor ambient temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the coolant in the first circulation path 14 cannot provide sufficient cooling simply by exchanging heat with the outdoor ambient temperature. By controlling the operation of the outdoor fan 60, indoor fan 50, circulation pump 11 and spray system 30, and controlling the compressor 21 to shut down, the spray system 30 sprays spray water to the vicinity of the second heat exchanger 13. The spray water evaporates and absorbs heat, which can accelerate the heat dissipation of the coolant in the second heat exchanger 13 and more fully reduce the temperature of the coolant leaving the second heat exchanger 13, so that it can provide more sufficient cooling in the first heat exchanger 12. Moreover, compared with turning on the compressor 21, turning on the spray system 30 requires less energy, which can reduce the electrical energy consumed by the chiller unit 100 while ensuring sufficient cooling capacity.

[0109] When the outdoor ambient temperature is less than or equal to the first preset temperature, the coolant in the first circulation path 14 can provide sufficient cooling simply by exchanging heat with the outdoor ambient temperature. By controlling the operation of the outdoor fan 60, the indoor fan 50 and the circulation pump 11, and controlling the compressor 21 and the spray system 30 to shut down, the power consumption of the chiller unit 100 can be reduced while ensuring sufficient cooling capacity.

[0110] The following is for reference. Figures 1-4 A chiller unit 100 according to some embodiments of the present invention is described.

[0111] In this embodiment, reference Figure 1 The chiller unit 100 includes a first cooling system 10, a spray system 30, a second cooling system 20, a drainage pipe 40, an indoor fan 50, and an outdoor fan 60.

[0112] 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 circulating flow path 14 for the circulation of coolant. The second heat exchanger 13 is located outdoors and is used for heat exchange with outdoor air. The first cooling system 10 also includes a first bypass pipe 15, which is connected to the first circulating flow path 14. A third control valve 151 is provided on the first bypass pipe 15 to control the opening and closing of the first bypass pipe 15. The outlet end of the first heat exchanger 12 is connected to the inlet end of the second heat exchanger 13 through a second connecting pipe 16a, and the inlet end of the first bypass pipe 15 is connected to the second connecting pipe 16a. The first bypass pipe 15 includes a third connecting pipe section 16, which connects the inlet end of the first bypass pipe 15 to the inlet end of the second heat exchanger 13. The third connecting pipe section 16 is provided with a fourth control valve 161 for controlling the on / off state of the third connecting pipe section 16. The outlet end of the first bypass pipe 15 is connected to the inlet end of the second heat exchanger 13.

[0113] The spray system 30 includes a water storage tank 31, a water pump 32, and a spray component 33. The water storage tank 31, the water pump 32, and the spray component 33 are connected in sequence to form a spray flow path 34. The spray component 33 is used to spray water onto the second heat exchanger 13. The spray system 30 includes a second bypass pipe 36, which is connected to the spray flow path 34. The outlet of the water pump 32 is connected to the spray component 33 through a first connecting pipe 35. The second bypass pipe 36 includes a first connecting pipe section 362 and a second connecting pipe section 363. One end of the first connecting pipe section 362 is connected to the first connecting pipe 35 and the other end of the first connecting pipe section 362 is connected to the inlet of the third heat exchange channel 223. A first control valve 361 is provided on the first connecting pipe section 362. One end of the second connecting pipe section 363 is connected to the first connecting pipe 35 and the other end of the second connecting pipe section 363 is connected to the outlet of the third heat exchange channel 223. The second connecting pipe section 363 is provided with a one-way valve 364, which conducts unidirectionally from the outlet of the third heat exchange channel 223 to the first connecting pipe 35. A second control valve 351 is provided on the first connecting pipe 35, which is used to control the opening and closing of the first connecting pipe 35. The connection point between the first connecting pipe section 362 and the first connecting pipe 35 is designated as the first connection position 352. The connection point between the second connecting pipe section 363 and the first connecting pipe 35 is designated as the second connection position 353. In the water flow direction within the first connecting pipe 35, the second connection position 353 is located downstream of the first connection position 352. The outlet of the water pump 32 is connected to the spray component 33 via the first connecting pipe 35. A second control valve 351 is provided on the first connecting pipe 35 to control the opening and closing of the first connecting pipe 35. The second control valve 351 is located between the first connection position 352 and the second connection position 353.

[0114] 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. The condenser 22 is a plate heat exchanger and has a first heat exchange channel 221, a second heat exchange channel 222, and a third heat exchange channel 223 that are separated from each other. The second heat exchange channel 222 and the third heat exchange channel 223 exchange heat with the first heat exchange channel 221. The first heat exchange channel 221 forms part of the second circulation path 25, the second heat exchange channel 222 forms part of the first bypass pipe 15, and the third heat exchange channel 223 forms part of the second bypass pipe 36.

[0115] The drain pipe 40 is connected to the bottom of the condenser 22 and communicates with the third heat exchange channel 223. The drain pipe 40 is equipped with a drain valve for controlling the opening and closing of the drain pipe 40.

[0116] The indoor fan 50 is located indoors and is used to drive indoor air to flow through the first heat exchanger 12 or through the first heat exchanger 12 and the evaporator 24.

[0117] The outdoor fan 60 is located outdoors and is used to drive outdoor air to flow through the second heat exchanger 13.

[0118] refer to Figure 2 When the outdoor ambient temperature is less than or equal to the first preset temperature, the natural cooling mode can be activated. At this time, the first control valve 361 and the third control valve 151 are closed, and the second control valve 351 and the fourth control valve 161 are opened. The second control valve 351 can be opened or closed as needed. The coolant in the first cooling system 10 is circulated and exchanges heat with the cold outdoor air through the second heat exchanger 13. Then, the coolant exchanges heat with the indoor air through the first heat exchanger 12 to meet the cooling needs of the indoor environment.

[0119] refer to Figure 3 When the outdoor ambient temperature exceeds the first preset temperature, a hybrid cooling mode can be activated, with both the first cooling system 10 and the second cooling system 20 operating. These two systems provide cooling capacity to the indoor environment, meeting the cooling requirements. At this time, the first control valve 361 can be closed, while the second control valve 351, the third control valve 151, and the fourth control valve 161 can be opened. The first bypass pipe 15 is then open, allowing the coolant in the first circulation path 14 to enter the second heat exchange channel 222 of the condenser 22. There, it exchanges heat with the refrigerant in the first heat exchange channel 221, cooling the refrigerant flowing through the condenser 22. Simultaneously, the refrigerant in the second cooling system 20 circulates through the evaporator 24 in the second circulation path 25, exchanging heat with the indoor air. This, combined with the first cooling system 10, cools the indoor environment to meet its cooling needs.

[0120] refer to Figure 4 When the first circulation path 14 fails, the first bypass pipe 15 cannot dissipate heat from the condenser 22, and the dry cooling fault mode can be activated. At this time, the second control valve 351, the third control valve 151 and the fourth control valve 161 are closed, the first control valve 361 is opened, the second bypass pipe 36 is opened, and the spray water of the spray system 30 can enter the third heat exchange channel 223 of the condenser 22 through the second bypass pipe 36 to exchange heat with the refrigerant in the first heat exchange channel 221, thereby cooling the refrigerant flowing through the condenser 22. The circulation of the refrigerant in the second cooling system 20 is used to exchange heat with the indoor air through the evaporator 24 to meet the cooling needs of the indoor environment.

[0121] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0122] In the description of this invention, "a plurality of" means two or more.

[0123] 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.

[0124] 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 circulation path for circulating coolant. The second heat exchanger is located outdoors and is used for heat exchange with outdoor air. The first cooling system also includes a first bypass pipe connected to the first circulation path. A spraying system includes a water storage tank, a water pump, and spraying components. The water storage tank, the water pump, and the spraying components are connected in sequence to form a spraying flow path. The spraying components are used to spray water onto the second heat exchanger. The spraying system includes a second bypass pipe, which is connected to the spraying flow path. 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 sequentially connected to form a second circulation path for refrigerant circulation. The condenser has a first heat exchange channel, a second heat exchange channel, and a third heat exchange channel that are separated from each other. The second heat exchange channel and the third heat exchange channel exchange heat with the first heat exchange channel. The first heat exchange channel forms part of the second circulation path, the second heat exchange channel forms part of the first bypass pipe, and the third heat exchange channel forms part of the second bypass pipe.

2. The chiller unit according to claim 1, characterized in that, The condenser is a plate heat exchanger.

3. The chiller unit according to claim 1, characterized in that, The second bypass pipeline is equipped with a first control valve, which is used to control the opening and closing of the second bypass pipeline.

4. The chiller unit according to claim 3, characterized in that, The outlet of the water pump is connected to the spraying component via a first connecting pipe. A second control valve is provided on the first connecting pipe, which is used to control the opening and closing of the first connecting pipe.

5. The chiller unit according to claim 3, characterized in that, The outlet of the water pump is connected to the spray component via a first connecting pipe. The second bypass pipe includes a first connecting pipe section. One end of the first connecting pipe section is connected to the first connecting pipe, and the other end of the first connecting pipe section is connected to the inlet of the third heat exchange channel. The first control valve is located in the first connecting pipe section.

6. The chiller unit according to claim 5, characterized in that, The second bypass pipeline includes a second connecting pipe section, one end of which is connected to the first connecting pipeline and the other end of which is connected to the outlet of the third heat exchange channel. The second connecting pipe section is equipped with a one-way valve, which is unidirectionally open from the outlet of the third heat exchange channel to the first connecting pipeline.

7. The chiller unit according to claim 6, characterized in that, The connection position between the first connecting pipe segment and the first connecting pipe is the first connection position, and the connection position between the second connecting pipe segment and the first connecting pipe is the second connection position. In the direction of water flow in the first connecting pipe, the second connection position is located downstream of the first connection position.

8. The chiller unit according to claim 7, characterized in that, The outlet of the water pump is connected to the spraying component via a first connecting pipe. A second control valve is provided on the first connecting pipe. The second control valve is used to control the opening and closing of the first connecting pipe and is located between the first connection position and the second connection position.

9. The chiller unit according to claim 1, characterized in that, A third control valve is provided on the first bypass pipeline, and the third control valve is used to control the opening and closing of the first bypass pipeline.

10. The chiller unit according to claim 1, characterized in that, The outlet end of the first heat exchanger is connected to the inlet end of the second heat exchanger via a second connecting pipe, and the inlet end of the first bypass pipe is connected to the second connecting pipe.

11. The chiller unit according to claim 10, characterized in that, The second connecting pipe includes a third connecting pipe section, which connects the inlet end of the first bypass pipe to the inlet end of the second heat exchanger. The third connecting pipe section is provided with a fourth control valve for controlling the on / off state of the third connecting pipe section.

12. The chiller unit according to claim 1, characterized in that, The outlet end of the first bypass pipe is connected to the inlet end of the second heat exchanger.

13. The chiller unit according to any one of claims 1-12, characterized in that, It includes a drain pipe, which is connected to the condenser and communicates with the third heat exchange channel, and the drain pipe is provided with a drain valve for controlling the opening and closing of the drain pipe.

14. The chiller unit according to claim 13, characterized in that, The drain pipe is connected to the bottom of the condenser.

15. The chiller unit according to any one of claims 1-12, characterized in that, The chiller unit includes an indoor fan, which is located indoors and is used to drive indoor air to flow through the first heat exchanger or through the first heat exchanger and the evaporator. And / or, the chiller unit includes an outdoor fan located outdoors and used to drive outdoor air through the second heat exchanger.

16. The chiller unit according to any one of claims 1-12, characterized in that, The chiller unit has a natural cooling mode, a mixed cooling mode, and a dry cooling fault mode; In the natural cooling mode, the circulation pump is turned on and the compressor is turned off, and both the first bypass line and the second bypass line are disconnected; In the hybrid cooling mode, both the circulation pump and the compressor are turned on, the first bypass line is open and the second bypass line is closed; In the dry-cooling fault mode, if the first circulation path fails, the compressor starts, the first bypass line is disconnected, and the second bypass line is connected.

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