Cooling system

Abstract

The utility model relates to the technical field of heat exchange, in particular to a cooling system which comprises a cold water pool, a first refrigerating machine, a cooling tower, a first cooling water circulation path and a second cooling water circulation path. The first cooling water circulation channel is sequentially communicated with an outlet of the cold water pool, an inlet of the first refrigerating machine, an outlet of the first refrigerating machine and an inlet of the cold water pool. The cooling water circulation passage is sequentially communicated with an outlet of the first refrigerating machine, an inlet of the cooling tower, an outlet of the cooling tower and an inlet of the first refrigerating machine; a first bypass pipeline is arranged between an outlet of the cold water pool and an inlet of the cooling tower, and a second bypass pipeline is arranged between an outlet of the cooling tower and an inlet of the cold water pool. The utility model aims to overcome the defects in the prior art, and provides a cooling system which can properly adjust a refrigeration mechanism of chilled water according to different environment temperatures so as to achieve the purposes of environmental protection, energy conservation and maximization of energy utilization efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange technical field more particularly, relate to a cooling system. BACKGROUND

[0002] The prior art refrigeration system is composed of a cold water tank, a refrigeration unit, an air cooling unit and related water pumps and pipelines. In the refrigeration process, the water to be frozen is pumped from the cold water tank to the refrigeration unit, and after being cooled by the refrigeration unit, it returns to the cold water tank. The cooling water on the cooling water side is sent to the cooling tower at a high place outside the room for air cooling to complete the cooling process of the cooling water. Figure 1 The prior art refrigeration system has the following disadvantages: in the refrigeration process, the water in the cold water tank must be cooled by the refrigeration unit to maintain the temperature at the set value. When the ambient temperature is lower than the set value of the frozen water, the refrigeration unit must still be operated to reduce the temperature to the set requirement, resulting in energy waste in the refrigeration process. SUMMARY

[0003] The utility model aims at overcoming the defects of the prior art and providing a cooling system that can adjust the refrigeration of the frozen water according to different ambient temperatures to achieve environmental protection and energy saving and maximize the energy utilization efficiency.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] The utility model provides a cooling system, including cold water pool, first refrigeration unit, cooling tower, first cooling water circulation pass, cooling water circulation pass, first cooling water circulation pass is communicated gradually the outlet of cold water pool, the inlet of first refrigeration unit, the outlet of first refrigeration unit and the inlet of cold water pool, cooling water circulation pass is communicated gradually the outlet of first refrigeration unit, the inlet of cooling tower, the outlet of cooling tower and the inlet of first refrigeration unit, and the first bypass pipeline is equipped between the outlet of cold water pool and the inlet of cooling tower, and the second bypass pipeline is equipped between the outlet of cooling tower and the inlet of cold water pool.

[0006] The cold water pool is used for storing chilled water and is used for heat exchange of a user side; the first refrigerating machine and the cooling tower are used for a system side, are responsible for dissipating heat to an external environment, and make the cooling liquid after temperature rising of the user side to be cooled again to become the chilled liquid for recycling.

[0007] Further, the first cooling water circulation passage comprises a first passage and a first loop, two ends of the first passage are communicated with an outlet of the cold water pool and an inlet of the first refrigerating machine respectively, and two ends of the first loop are communicated with an outlet of the first refrigerating machine and an inlet of the cold water pool respectively; the cooling water circulation passage comprises a second passage and a second loop, two ends of the second passage are communicated with the outlet of the first refrigerating machine and an inlet of the cooling tower respectively, and two ends of the second loop are communicated with an outlet of the cooling tower and the inlet of the first refrigerating machine respectively; two ends of the first bypass pipeline are communicated with the first passage and the second passage respectively, and two ends of the second bypass pipeline are communicated with the second loop and the first loop respectively. The first passage is used for transporting the cooling liquid after heat exchange with the user side and temperature rising from the chilled liquid to the first refrigerating machine, the first loop is used for transporting the chilled liquid after cooling in the first refrigerating machine back to the cold water pool, the second passage is used for further cooling the cooling liquid in the system side, and the cooling liquid is transported to the cooling tower again after cooling in the second passage, and then is transported back to the first refrigerating machine through the second loop; when the environmental temperature is low, the cooling liquid can be directly bypassed to the cooling tower through the first bypass pipeline, so that the cooling liquid is cooled again in the cooling tower, becomes the chilled liquid, and then is transported back to the cold water pool through the second bypass pipeline for a new round of cooling; therefore, when the environmental temperature is high, the cooling liquid needs to be cooled twice through the first refrigerating machine and the cooling tower to become the chilled liquid, and when the environmental temperature is low, the cooling liquid can become the chilled liquid only through the cooling tower once.

[0008] Further, the first passage is provided with a first water pump in series, and the second passage is provided with a second water pump in series. The first water pump is used for pumping the solution from the cold water pool to the first refrigerating machine for refrigeration circulation. The second water pump is used for pumping the solution from the cold water pool directly to the cooling tower.

[0009] Further, a cold coil is further included, the cold coil is arranged in parallel with the cooling tower, and two ends of the cold coil are communicated with the second passage and the second loop respectively. When the ambient temperature continues to decrease, the cooling water is refrigerated by the cold coil in parallel with the cooling tower, that is, the cold coil is directly used for heat exchange with the ambient temperature, and neither the first refrigerating machine nor the cooling tower needs to be started, so that the power consumption of the low-temperature environment can be further reduced.

[0010] Further, the cold coil is in one of S shape, snake shape and spiral shape. The cold coil in the S shape, the snake shape or the spiral shape can increase the contact area of the cold coil with the air in the environment, so that the heat exchange area is increased and the heat exchange efficiency is improved.

[0011] Further, a filter is further included and arranged in the second bypass pipeline. Preferably, an automatic backwashing filter is used to filter the return water of the cooling tower and prevent impurities from polluting the cooling water pool.

[0012] Further, the first refrigerating machine is one of a piston refrigerating machine, a screw refrigerating machine, a scroll refrigerating machine and a centrifugal refrigerating machine. The above refrigerating machines use different driving modes for refrigeration, but none of them uses a compressor for refrigeration, and any one of the above can meet the requirements. Preferably, the screw refrigerating machine is used.

[0013] Further, a second refrigerating machine, a second cooling water circulation passage, a heater and a liquid circulation passage are further included, the second cooling water circulation passage is sequentially communicated with the outlet of the cooling water pool, the inlet of the second refrigerating machine, the outlet of the second refrigerating machine and the inlet of the cooling water pool, the liquid circulation passage is sequentially communicated with the outlet of the second refrigerating machine, the inlet of the heater, the outlet of the heater and the inlet of the second refrigerating machine, and the second refrigerating machine is a lithium bromide refrigerating machine. The lithium bromide refrigerating machine is an absorption refrigeration device, and its working principle is different from the principle of the compressor refrigeration in the foregoing. The working principle of the lithium bromide refrigerating machine is based on the absorption characteristics of the lithium bromide water solution, and the refrigeration cycle is realized by absorbing and releasing water vapor, and hot water needs to be used for refrigeration. The lithium bromide refrigerating machine is connected in parallel with the existing single refrigeration source refrigeration system to realize multi-source refrigeration, so that hot water is prepared by the heater and then the lithium bromide refrigerating machine to prepare frozen liquid, so as to realize emergency refrigeration when the single refrigeration source fails, and refrigeration can also be realized at the same time by the multi-source, so that the refrigeration efficiency is improved.

[0014] Further, the liquid circulation passage includes a third passage and a third loop, two ends of the third passage are communicated with the outlet of the second refrigerating machine and the inlet of the heater respectively, and the third loop is sequentially communicated with the outlet of the heater and the inlet of the second refrigerating machine. The third passage and the third loop are used for providing hot water circulation for the second refrigerating machine.

[0015] Further, a hot water storage tank is further included, which is connected in series in the third circuit, and two ends of the hot water storage tank are communicated with the outlet of the heater and the inlet of the second refrigerator respectively.

[0016] Further, the heater is a vacuum heat collector group. The vacuum heat collector group is heated by solar energy, hot water is obtained by the vacuum heat collector, and then refrigerant is obtained by the lithium bromide refrigerator group. When the ambient temperature is high and the illumination is sufficient, the cold source where the first refrigerator is located is closed to reduce the power consumption.

[0017] Further, the third water pump is further connected in series in the third circuit, and two ends of the third water pump are communicated with the outlet of the second refrigerator and the inlet of the heater respectively. The third water pump is used for realizing the hot water circulation of the second refrigerator.

[0018] Further, a first automatic valve is arranged at the front end of the first water pump, a second automatic valve is arranged at the front end of the second water pump, the second water pump is arranged at the front end of the cold coil, a third automatic valve is arranged at the inlet of the second circuit where the first refrigerator is located, a fourth automatic valve is arranged at the end of the cold coil close to the second water pump, a fifth automatic valve is arranged at the other end of the cold coil, a sixth automatic valve is arranged at the end of the cooling tower close to the second water pump, and a seventh automatic valve is arranged at the other end of the cooling tower. The first automatic valve is closed in the low-temperature mode, so that the liquid from the cold water pool cannot pass through the first refrigerator; the second automatic valve is opened in the low-temperature mode, so that the liquid from the cold water pool can enter the second circuit; the third automatic valve is closed in the low-temperature mode, so that the water returned by the cooling tower cannot return to the first refrigerator; the fourth automatic valve is used for opening in the low-temperature mode, so that the liquid from the cold water pool can directly pass through the cold coil for cooling; the fifth automatic valve is opened synchronously when the fourth automatic valve is opened, and is closed synchronously when the fourth automatic valve is closed, so as to avoid that the liquid enters the cold coil when the cooling tower is used for cooling; and the sixth automatic valve and the seventh automatic valve are used for controlling the operation of the cooling tower, so that the cooling tower is opened when the cooling tower is needed to be used for cooling, and the cooling tower is closed when the cold coil is used for cooling.

[0019] Further, temperature sensors are arranged in the cold water pool, the cooling tower and the hot water storage tank. The temperature sensors are used for monitoring the temperature, and are communicated with the automatic valves to realize automatic control.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] (1) temperature sensors and automatic valves are adopted to realize automatic control of refrigeration mode switching;

[0022] (2) when the outdoor environment is low temperature, multi-stage refrigeration mode is adopted, the first refrigerator is not started to realize refrigeration water temperature reduction, and energy consumption is reduced;

[0023] (3) At the same time, multiple cold sources are arranged, and when the ambient temperature is high and the illumination is sufficient, hot water is prepared by using a vacuum heat collecting tube group of solar energy, and then refrigeration is carried out through a lithium bromide refrigerator, so that the refrigeration energy consumption can be reduced;

[0024] (4) Different refrigeration modes can be adopted for refrigeration according to different ambient temperatures through intelligent control, so that the high-efficiency and stable operation of the refrigeration system can be realized, environmental protection and energy saving can be achieved, and the energy utilization efficiency can be maximized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the prior art cooling system;

[0026] Figure 2 It is a structural block diagram of the cooling system embodiment 1 of the utility model;

[0027] Figure 3 It is a structural block diagram of the cooling system embodiment 2 of the utility model;

[0028] Figure 4 It is a structural block diagram of the cooling system embodiment 3 of the utility model.

[0029] The illustration marks are explained as follows:

[0030] 1, cold water pool; 2, first refrigerator; 3, cooling tower; 41, first water pump; 42, second water pump; 43, third water pump; 5, cold coil; 6, filter; 7, second refrigerator; 8, heater; 9, hot water storage tank; 101, first bypass pipeline; 102, second bypass pipeline; 103, first passage; 104, first loop; 105, second passage; 106, second loop; 107, third passage; 108, third loop. DETAILED DESCRIPTION

[0031] The utility model will be further explained in combination with specific implementation manners. Among them, the drawings are only used for example explanation, and the representation is only a schematic view, not a physical drawing, and cannot be understood as the limitation of the patent; in order to better explain the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.

[0032] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or position relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or position relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] Embodiment 1

[0034] As Figure 2 The first embodiment of the cooling system of the present application is shown, which comprises a cold water pool 1, a first refrigerating machine 2, a cooling tower 3, a first cooling water circulating passage, a cooling water circulating passage, the first cooling water circulating passage is sequentially connected with the outlet of the cold water pool 1, the inlet of the first refrigerating machine 2, the outlet of the first refrigerating machine 2 and the inlet of the cold water pool 1; the cooling water circulating passage is sequentially connected with the outlet of the first refrigerating machine 2, the inlet of the cooling tower 3, the outlet of the cooling tower 3 and the inlet of the first refrigerating machine 2; the first bypass pipeline 101 is arranged between the outlet of the cold water pool 1 and the inlet of the cooling tower 3, and the second bypass pipeline 102 is arranged between the outlet of the cooling tower 3 and the inlet of the cold water pool 1.

[0035] As an embodiment of the utility model, the first cooling water circulation passage includes a first passage 103 and a first loop 104, both ends of the first passage 103 are communicated with the outlet of the cold water pool 1 and the inlet of the first refrigerator 2 respectively, both ends of the first loop 104 are communicated with the outlet of the first refrigerator 2 and the inlet of the cold water pool 1 respectively; the cooling water circulation passage includes a second passage 105 and a second loop 106, both ends of the second passage 105 are communicated with the outlet of the first refrigerator 2 and the inlet of the cooling tower 3 respectively, both ends of the second loop 106 are communicated with the outlet of the cooling tower 3 and the inlet of the first refrigerator 2 respectively; both ends of the first bypass pipeline 101 are communicated with the first passage 103 and the second passage 105 respectively, both ends of the second bypass pipeline 102 are communicated with the second loop 106 and the first loop 104 respectively. The first passage 103 is used for transporting the cooling liquid, which is changed from the refrigerating liquid after heat exchange with the user side and temperature rise, back to the first refrigerator 2, and the first loop 104 is used for transporting the refrigerating liquid, which is cooled in the first refrigerator 2, back to the cold water pool 1; and the second passage 105 is used for further cooling the cooling liquid on the system side, and the cooling liquid is transported to the cooling tower 3 through the second passage 105, cooled again in the cooling tower 3, and then transported back to the first refrigerator 2 through the second loop 106; when the environmental temperature is low, the cooling liquid can also directly bypass the first refrigerator 2, be transported to the cooling tower 3 through the first bypass pipeline 101, be cooled again in the cooling tower 3, be changed into the refrigerating liquid, and then be transported back to the cold water pool 1 through the second bypass pipeline 102 to be cooled again; therefore, when the environmental temperature is high, the cooling liquid needs to be cooled twice through the first refrigerator 2 and the cooling tower 3 to be changed into the refrigerating liquid, and when the environmental temperature is low, the cooling liquid can be changed into the refrigerating liquid through the cooling tower 3 once.

[0036] As an embodiment of the utility model, the first passage 103 is connected with the first water pump 41 in series, and the second passage 105 is connected with the second water pump 42 in series. The first water pump 41 is used for pumping the solution from the cold water pool 1 to the first refrigerator 2 to perform refrigeration circulation. The second water pump 42 is used for pumping the solution from the cold water pool 1 directly to the cooling tower 3.

[0037] As an embodiment of the utility model, the filter 6 is arranged in the second bypass pipeline 102. Preferably, the automatic backwashing filter 6 is adopted to filter the backwater of the cooling tower 3 and prevent impurities from polluting the cold water pool 1.

[0038] As an embodiment of the utility model, the first refrigerator 2 is one of a piston type refrigerator, a screw type refrigerator, a scroll type refrigerator and a centrifugal type refrigerator.

[0039] Embodiment 2

[0040] As Figure 3As shown in the second embodiment of the cooling system, the embodiment is similar to the embodiment 1, and the difference lies in further comprising a cold coil 5, the cold coil 5 is arranged in parallel with the cooling tower 3, and the two ends of the cold coil 5 are communicated with the second passage 105 and the second loop 106 respectively. When the ambient temperature continues to decrease, the cooling water is refrigerated by the cold coil 5 arranged in parallel with the cooling tower 3, that is, the cold coil 5 is directly used for heat exchange with the ambient temperature, and the first refrigerating machine 2 and the cooling tower 3 are not started, so that the power consumption of the low-temperature environment can be further reduced.

[0041] As an embodiment of the utility model, the shape of the cold coil 5 is one of S-shaped, serpentine-shaped and spiral-shaped. The S-shaped, serpentine-shaped and spiral-shaped cold coil 5 can increase the contact area with the air in the environment, thereby increasing the heat exchange area and improving the heat exchange efficiency.

[0042] As an embodiment of the utility model, a first automatic valve is arranged at the front end of the first water pump 41, a second automatic valve is arranged at the front end of the second water pump 42, the second water pump 42 is arranged at the front end of the cold coil 5, a third automatic valve is arranged at the inlet of the second loop 106 of the first refrigerating machine 2, a fourth automatic valve is arranged at the end of the cold coil 5 close to the second water pump 42, a fifth automatic valve is arranged at the other end of the cold coil 5, a sixth automatic valve is arranged at the end of the cooling tower 3 close to the second water pump 42, and a seventh automatic valve is arranged at the other end of the cooling tower 3. The first automatic valve is closed in the low-temperature mode, so that the liquid from the cold water pool 1 cannot pass through the first refrigerating machine 2; the second automatic valve is opened in the low-temperature mode, so that the liquid from the cold water pool 1 can enter the second passage 105; the third automatic valve is closed in the low-temperature mode, so that the water returned by the cooling tower 3 cannot return to the first refrigerating machine 2; the fourth automatic valve is used to open in the low-temperature mode, so that the liquid from the cold water pool 1 can be directly cooled by the cold coil 5; the fifth automatic valve is opened synchronously when the fourth automatic valve is opened, and is closed synchronously when the fourth automatic valve is closed, so as to avoid that the liquid enters the cold coil 5 when the cooling tower 3 is used for cooling; the sixth automatic valve and the seventh automatic valve are used to control the operation of the cooling tower 3, so that the cooling tower 3 is opened when the cooling tower 3 is needed to be used for cooling, and the cooling tower 3 is closed when the cold coil 5 is used for cooling.

[0043] Embodiment 3

[0044] As Figure 4 As shown in the third embodiment of the cooling system, the embodiment is similar to the embodiment 1, and the difference lies in further comprising a second refrigerating machine 7, a second cooling water circulation passage, a heater 8 and a liquid circulation passage; the second cooling water circulation passage is sequentially communicated with the outlet of the cold water pool 1, the inlet of the second refrigerating machine 7, the outlet of the second refrigerating machine 7 and the inlet of the cold water pool 1; the liquid circulation passage is sequentially communicated with the outlet of the second refrigerating machine 7, the inlet of the heater 8, the outlet of the heater 8 and the inlet of the second refrigerating machine 7; and the second refrigerating machine 7 is a lithium bromide refrigerating machine.

[0045] The lithium bromide refrigerator is an absorption refrigeration equipment, which is different from the compressor refrigeration principle in the foregoing, and its working principle is based on the absorption characteristics of lithium bromide aqueous solution, and refrigeration cycle is realized by absorbing and releasing water vapor, and hot water needs to be used for refrigeration. The utility model discloses in the refrigeration system of the single refrigeration source in the prior art, parallelly connected lithium bromide refrigerator is used for refrigeration to realize multi-source refrigeration, in the refrigeration process, the heater 8 can be used to prepare hot water, and then the lithium bromide refrigerator unit is used to prepare cold liquid, so that emergency refrigeration can be realized when the single refrigeration source fails, and multi-source refrigeration can also be realized simultaneously to improve the refrigeration efficiency.

[0046] As one embodiment of the utility model, the liquid circulation passage includes a third passage 107 and a third loop 108, the two ends of the third passage 107 are communicated with the outlet of the second refrigerator 7 and the inlet of the heater 8 respectively, and the third loop 108 is communicated with the outlet of the heater 8 and the inlet of the second refrigerator 7 in sequence. The third passage 107 and the third loop 108 are used for providing hot water circulation for the second refrigerator 7.

[0047] As one embodiment of the utility model, the utility model also includes a hot water storage tank 9, the hot water storage tank 9 is connected in the third loop 108, and the two ends of the hot water storage tank 9 are communicated with the outlet of the heater 8 and the inlet of the second refrigerator 7 respectively. The hot water storage tank 9 is used for storing the hot water heated in the heater 8.

[0048] As one embodiment of the utility model, the heater 8 is a vacuum heat collecting tube group. The vacuum heat collecting tube group is heated by using solar energy, the vacuum heat collecting tube is used to prepare hot water, and then the lithium bromide refrigerator unit is used to prepare frozen liquid, and the refrigeration source where the first refrigerator 2 is located is closed when the ambient temperature is high and the illumination is sufficient, so that the power consumption can be reduced.

[0049] As one embodiment of the utility model, a third water pump 43 is also connected in the third passage 107, and the two ends of the third water pump 43 are communicated with the outlet of the second refrigerator 7 and the inlet of the heater 8 respectively. The third water pump 43 is used for realizing hot water circulation of the second refrigerator 7.

[0050] Obviously, the above embodiment of the utility model is only an example for clearly explaining the utility model, and is not a limitation on the embodiment of the utility model. For ordinary skilled person in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cooling system comprising a cold water tank (1), a first chiller (2), a cooling tower (3), a first cooling water circulation path, and a cooling water circulation channel, wherein the first cooling water circulation path is sequentially connected to the outlet of the cold water tank (1), the inlet of the first chiller (2), the outlet of the first chiller (2), and the inlet of the cold water tank (1); the cooling water circulation channel is sequentially connected to the outlet of the first chiller (2), the inlet of the cooling tower (3), the outlet of the cooling tower (3), and the inlet of the first chiller (2); characterized in that, A first bypass pipe (101) is provided between the outlet of the cold water pool (1) and the inlet of the cooling tower (3), and a second bypass pipe (102) is provided between the outlet of the cooling tower (3) and the inlet of the cold water pool (1).

2. The cooling system according to claim 1, characterized in that, The first cooling water circulation path includes a first passage (103) and a first loop (104). The two ends of the first passage (103) are respectively connected to the outlet of the cold water pool (1) and the inlet of the first chiller (2). The two ends of the first loop (104) are respectively connected to the outlet of the first chiller (2) and the inlet of the cold water pool (1). The cooling water circulation path includes a second passage (105) and a second loop (106). The two ends of the second passage (105) are respectively connected to the outlet of the first chiller (2) and the inlet of the cooling tower (3). The two ends of the second loop (106) are respectively connected to the outlet of the cooling tower (3) and the inlet of the first chiller (2). The two ends of the first bypass pipe (101) are respectively connected to the first passage (103) and the second passage (105). The two ends of the second bypass pipe (102) are respectively connected to the second loop (106) and the first loop (104).

3. The cooling system according to claim 2, characterized in that, A first water pump (41) is connected in series in the first passage (103), and a second water pump (42) is connected in series in the second passage (105).

4. The cooling system according to claim 2, characterized in that, It also includes a cold coil (5), which is connected in parallel with the cooling tower (3), and the two ends of the cold coil (5) are connected to the second passage (105) and the second circuit (106) respectively.

5. The cooling system according to claim 2, characterized in that, It also includes a filter (6) disposed in the second bypass line (102).

6. The cooling system according to claim 1, characterized in that, The first refrigeration unit (2) is one of the following: piston refrigeration unit, screw refrigeration unit, scroll refrigeration unit, and centrifugal refrigeration unit.

7. The cooling system according to any one of claims 1 to 6, characterized in that, It also includes a second chiller (7), a second cooling water circulation passage, a heater (8), and a liquid circulation passage. The second cooling water circulation passage is sequentially connected to the outlet of the cold water pool (1), the inlet of the second chiller (7), the outlet of the second chiller (7), and the inlet of the cold water pool (1). The liquid circulation passage is sequentially connected to the outlet of the second chiller (7), the inlet of the heater (8), the outlet of the heater (8), and the inlet of the second chiller (7). The second chiller (7) is a lithium bromide chiller.

8. The cooling system according to claim 7, characterized in that, The liquid circulation path includes a third passage (107) and a third loop (108). The two ends of the third passage (107) are respectively connected to the outlet of the second refrigerator (7) and the inlet of the heater (8); the third loop (108) is sequentially connected to the outlet of the heater (8) and the inlet of the second refrigerator (7).

9. The cooling system according to claim 8, characterized in that, It also includes a hot water storage tank (9), which is connected in series in the third circuit (108). The two ends of the hot water storage tank (9) are respectively connected to the outlet of the heater (8) and the inlet of the second refrigerator (7).

10. The cooling system according to claim 7, characterized in that, The heater (8) is a vacuum heat collection tube assembly.

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