Coupling type refrigerating system and operation method thereof

Abstract

The invention belongs to the technical field of refrigeration, and particularly relates to a coupled refrigeration system and an operation method thereof, and the coupled refrigeration system comprises a heat pipe heat dissipation system, a sky radiation refrigeration system and a mechanical refrigeration system. The heat pipe heat dissipation system comprises a gravity heat pipe; the sky radiation refrigeration system comprises a first loop and a cold carrying medium, the first loop is further sequentially connected with a radiation refrigeration module, a first pump body and a heat exchange assembly, and the heat exchange assembly is coupled with the condensation end of the gravity heat pipe and used for taking away heat of the condensation end of the gravity heat pipe. The radiation refrigeration module is used for transferring heat absorbed by a cold carrying medium from the condensation end of the gravity heat pipe to the outer space, and a third heat exchanger is arranged between the first pump body and the input end of the heat exchange assembly; the mechanical refrigerating system comprises a second loop and a refrigerating medium, an evaporator, a compressor, a condenser and a throttling mechanism are connected to the second loop, and the evaporator is coupled with the third heat exchanger and used for further refrigerating the cold carrying medium. According to the invention, the system energy consumption is greatly reduced, and the carbon emission is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration, and in particular relates to a coupled refrigeration system and an operating method thereof. Background Art

[0002] With the development of communication technology, the characteristic size of communication chips has shrunk by more than 100 times in ten years, which has led to the continuous increase in the power of electronic component modules and the increase in heat flux density per unit area. The heat dissipation problem has become an urgent problem affecting chip performance. With the increase in the power density of a single cabinet, the temperature rise rate caused by cooling failure has gradually increased. Overheating of IT equipment has caused server performance to decrease or hardware to be damaged, resulting in irreparable economic losses and even endangering personal safety and social stability. According to preliminary statistics, 25% of communication failures are caused by excessive temperatures in the data center due to municipal power outages or refrigeration equipment failures, and the cost of one downtime is as high as 2.4 million US dollars.

[0003] Data center natural cooling is an important means of energy conservation and consumption reduction in data centers. At present, fresh air cooling in data center natural cooling has attracted widespread attention due to its simple structure, high cooling efficiency, and economical use. However, there are several issues that most studies in this field have not yet considered in detail: 1) Since the benefits of power saving are far higher than water saving, most studies in this field have not considered further reducing the water consumption of DC (data center) cooling systems. However, according to the publicly available water consumption data, the data center industry is becoming a potential water-consuming sector, and fresh air cooling has a high humidification water consumption; 2) The environmental problem of global warming is becoming increasingly severe. Natural cooling technology can reduce DC power consumption and thus reduce carbon footprint, but almost all of DC power consumption is converted into low-grade waste heat. The natural cooling technology currently used in DC is to dissipate waste heat into the living environment, which may be difficult to solve global warming caused by thermal pollution; 3) Fresh air cooling with outdoor air as the only cooling source has strict requirements on environmental conditions, including various temperature, humidity and air quality standards. Many restrictions have prevented the natural cooling potential of fresh air cooling from being fully utilized. Further coupling other natural cooling sources and natural cooling methods is a possible improvement method for the above problems. Unfortunately, there are few studies on data center cooling systems that couple multiple natural cooling methods.

[0004] Now, a novel natural cooling technology is emerging. The industry calls it sky radiation cooling. Sky radiation cooling technology is based on the principle of thermal radiation, that is, objects with higher temperatures will radiate energy to the outside world to lower the temperature. In the earth's atmosphere, there is an "atmospheric window" that is highly transparent to infrared radiation in the 8-13μm band, allowing infrared radiation from the earth's surface to pass through and be released into the universe. Since the temperature of the cosmic background is extremely low (about 2.7K), much lower than the average temperature of the earth's surface (about 290K), objects on the earth's surface can emit infrared radiation to the universe through this window, thereby achieving self-cooling. Sky radiation cooling is being widely concerned and studied for its simple structure, strong plasticity, no energy consumption, zero water consumption, and no environmental impact. However, research on coupled sky radiation cooling as a natural cooling system for data centers is still relatively scarce at this stage. Summary of the invention

[0005] The purpose of the present invention is to provide a coupled refrigeration system and an operating method thereof in order to solve the above-mentioned technical problems, thereby achieving the effect of reducing system energy consumption and carbon emissions.

[0006] In view of this, the present invention provides a coupled refrigeration system, comprising:

[0007] A heat pipe heat dissipation system, wherein the heat pipe heat dissipation system comprises a gravity heat pipe, wherein the gravity heat pipe comprises an evaporation end and a condensation end, wherein the evaporation end is used to reduce the temperature of the part to be cooled;

[0008] A sky radiation cooling system, the sky radiation cooling system comprising a first circuit and a cooling medium flowing in a pipeline of the first circuit, the first circuit is also connected in sequence with a radiation cooling module, a first pump body and a heat exchange component, the first pump body is used to drive the cooling medium to flow in the first circuit, the heat exchange component is coupled with the condensing end of the gravity heat pipe to take away the heat of the condensing end of the gravity heat pipe, the radiation cooling module is used to transfer the heat absorbed by the cooling medium from the condensing end of the gravity heat pipe to outer space, and a third heat exchanger is provided between the first pump body and the input end of the heat exchange component;

[0009] A mechanical refrigeration system, the mechanical refrigeration system includes a second circuit, a refrigerant flows in the second circuit, an evaporator, a compressor, a condenser and a throttling mechanism are connected to the second circuit, and the evaporator is coupled with a third heat exchanger to further cool the cold medium after being cooled by a radiation refrigeration module and before entering a heat exchange component.

[0010] In this technical solution, radiant cooling can achieve zero-energy refrigeration and reduce carbon emissions by efficiently reflecting sunlight and spontaneously transferring heat to the low-temperature outer space through infrared radiation at the atmospheric window. It is a negative carbon refrigeration technology that improves the carbon reduction performance of the system. By coupling radiant cooling, heat pipe refrigeration and mechanical refrigeration, it can greatly improve the utilization rate of natural cold sources and the system's heat conduction capacity. In particular, the evaporator of the mechanical refrigeration system can further cool the coolant medium after being cooled by the radiant refrigeration module and before entering the heat exchange component. It can make up for the defects under the working conditions where the sky radiant cooling system has a weak cooling effect on the coolant medium, thereby greatly reducing the system energy consumption and reducing carbon emissions.

[0011] Furthermore, electric three-way valves are respectively connected to the two ends of the radiation refrigeration module on the first circuit, and the sky radiation refrigeration system also includes a cold storage pipeline, the two ends of the cold storage pipeline are respectively connected to the above-mentioned electric three-way valves, and the cold storage pipeline is connected to a cold storage box and a second pump body. The cold storage box is used to store the cooled cold medium, and the second pump body is used to drive the cold medium flowing out of the radiation refrigeration module to be stored in the cold storage box.

[0012] In the present technical solution, by switching the electric three-way valve, the cold storage box can be switched between the cold storage and cold supply modes, and is used to extract the cold medium in the pipeline after being cooled by the radiation refrigeration module through the second pump body and store it in the cold storage box, or to extract the cold medium in the cold storage box into the pipeline through the first pump body according to the cooling effect of the radiation refrigeration module and the temperature of the gravity heat pipe condensation section.

[0013] Furthermore, the condenser of the mechanical refrigeration system is also equipped with an enhanced heat dissipation branch, which is used to dissipate heat from the condenser.

[0014] In this technical solution, strengthening the heat dissipation branch can dissipate heat for the condenser, improve the cooling effect and capacity of the condenser of the mechanical refrigeration system, thereby improving the energy efficiency of the mechanical refrigeration system and reducing energy consumption.

[0015] Furthermore, one end of the enhanced heat dissipation branch is connected between the first pump body and the third heat exchanger in the first circuit, and the other end is connected to the output end of the heat exchange component in the first circuit. The enhanced heat dissipation branch is connected with an electric valve and a second heat exchanger, and the second heat exchanger is used to dissipate heat from the condenser.

[0016] In the present technical scheme, the medium-temperature cooling medium after being cooled by the radiation refrigeration module in the first loop can be divided into two paths. One path flows to the third heat exchanger, and becomes a low-temperature cooling medium after being cooled by the evaporator. After that, it enters the heat exchange component to cool the condensing end of the gravity heat pipe, so that the evaporating end of the gravity heat pipe can cool the cooling part more efficiently. When the temperature of the condenser of the mechanical refrigeration system is too high, the electric valve is opened, and the medium-temperature cooling medium is divided into another path and flows to the second heat exchanger of the enhanced heat dissipation branch to dissipate the high-temperature condenser in the mechanical refrigeration system. Then the medium-temperature cooling medium becomes a high-temperature cooling medium and merges with the high-temperature cooling medium from the output end of the heat exchange component, and flows together in the first loop through the radiation refrigeration module for refrigeration. In this cycle, the medium-temperature cooling medium is divided into two paths to dissipate heat to the heat pipe heat dissipation system and the heat pipe heat dissipation system, and the high-temperature cooling medium returns to the first loop, which can make full use of the sky radiation cooling system, which not only improves the cooling effect of the overall system on the cooling parts, but also reduces energy consumption.

[0017] Furthermore, the heat exchange component includes a cold distribution unit and multiple first heat exchangers, the heat pipe heat dissipation system includes multiple gravity heat pipes, the condensing end of each gravity heat pipe is coupled to a first heat exchanger, and the cold distribution unit is used to distribute cold medium to each first heat exchanger.

[0018] Furthermore, the coupled refrigeration system also includes a control system, which includes a controller, a temperature and humidity sensing component, a wind speed module, a solar radiation module and a wind direction module. The temperature and humidity sensing component includes a temperature and humidity module of a meteorological station for collecting outdoor temperature and humidity and multiple temperature sensors arranged on various components in the system. The controller controls the operation of the electric three-way valve, the electric valve and the cooling capacity distribution unit according to the temperature and humidity, wind speed, wind direction and solar radiation measured by the temperature and humidity sensing component, the wind speed module, the solar radiation module and the wind direction module.

[0019] Furthermore, the components to be cooled include a CPU and / or a GPU and / or an equipment cabinet.

[0020] Furthermore, the operation method of the refrigeration system includes the following working modes:

[0021] Direct cooling mode of sky radiation cooling system: The evaporation end of the gravity heat pipe absorbs the temperature of the component to be cooled, and the heat is taken away by the cooling medium at the condensation end. The radiation cooling module transfers the heat of the cooling medium to the low-temperature outer space.

[0022] Cold storage box cold storage mode: When the temperature sensor measures that the temperature of the component to be cooled is lower than the preset value, and the temperature of the cooling medium flowing out of the radiation refrigeration module is lower than the temperature in the cold storage box, the controller controls the switching of the electric three-way valve to enable the second pump body to collect the cooling medium cooled by the sky radiation cooling system into the cold storage box.

[0023] Cold storage box cooling mode: When the temperature of the cooling medium flowing out of the radiation cooling module measured by the temperature sensor is higher than the set value and cannot be directly used for cooling, or the cooling medium outflow temperature of the radiation cooling module calculated according to meteorological parameters is higher than the set value, the controller controls the switching of the electric three-way valve to make the cooling medium stored in the cold storage box flow out of the cold storage pipeline as driven by the first pump body;

[0024] Mechanical refrigeration mode: When the temperature sensor measures that the temperature of the cooling medium entering the cooling distribution unit is higher than the system preset value, the mechanical refrigeration system is started to make the evaporator perform secondary cooling on the cooling medium flowing through the third heat exchanger;

[0025] Enhanced heat dissipation mode: When the temperature sensor measures that the heat dissipation temperature of the condenser of the mechanical refrigeration system is higher than the system preset value, the electric valve is opened to allow part of the cooling medium in the first circuit to flow to the second heat exchanger to cool the condenser.

[0026] The beneficial effects of the present invention are:

[0027] 1. Radiant cooling can achieve zero-energy refrigeration and reduce carbon emissions by efficiently reflecting sunlight and spontaneously transferring heat to the low-temperature outer space through infrared radiation at the atmospheric window. It is a negative carbon refrigeration technology that improves the carbon reduction performance of the system. By coupling radiant cooling, heat pipe refrigeration and mechanical refrigeration, it can greatly improve the utilization rate of natural cold sources and the system's heat conduction capacity. In particular, the evaporator of the mechanical refrigeration system can further cool the cold medium after being cooled by the radiant refrigeration module before entering the heat exchange component. It can make up for the defects under the condition that the sky radiant cooling system has a weak cooling effect on the cold medium, thereby greatly reducing the system's energy consumption and reducing carbon emissions.

[0028] 2. By switching the electric three-way valve, the cold storage box can switch between cold storage and cold supply modes. It is used to extract the cold medium in the pipeline after being cooled by the radiation refrigeration module through the second pump body and store it in the cold storage box, or extract the cold medium in the cold storage box into the pipeline through the first pump body according to the cooling effect of the radiation refrigeration module and the temperature of the gravity heat pipe condensation section. The cold medium can be stored and accessed according to the actual needs of the system, making the refrigeration system more accurate and reducing energy waste.

[0029] 3. The medium-temperature cooling medium after being cooled by the radiation cooling module in the first circuit can be divided into two paths. One path flows to the third heat exchanger, and after being cooled by the evaporator, it becomes a low-temperature cooling medium and then enters the heat exchange component to cool the condensing end of the gravity heat pipe, so that the evaporating end of the gravity heat pipe can cool the cooling part more efficiently. When the temperature of the condenser of the mechanical refrigeration system is too high, the electric valve is opened, and the medium-temperature cooling medium is divided into another path and flows to the second heat exchanger of the enhanced heat dissipation branch to dissipate the high-temperature condenser in the mechanical refrigeration system. Then the medium-temperature cooling medium becomes a high-temperature cooling medium. The cold medium merges with the high-temperature cooling medium from the output end of the heat exchange component, and flows together in the first loop to be cooled by the radiation refrigeration module. In this cycle, the enhanced heat dissipation branch can dissipate heat to the condenser, improve the cooling effect and capacity of the condenser of the mechanical refrigeration system, thereby improving the energy efficiency of the mechanical refrigeration system and reducing energy consumption. The medium-temperature cooling medium is divided into two paths to dissipate heat to the heat pipe heat dissipation system and the high-temperature cooling medium returns to the first loop after the heat pipe heat dissipation system dissipates heat, which can make full use of the sky radiation cooling system, which not only improves the cooling effect of the overall system on the cooling components, but also reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a system diagram of a coupled refrigeration system;

[0031] Figure 2 It is the working mode diagram of the coupled refrigeration system;

[0032] The symbols in the figure are:

[0033] 1. Heat pipe cooling system; 2. Parts to be cooled; 3. Evaporation end; 4. Condensation end; 5. Sky radiation cooling system; 6. Radiation cooling module; 7. First heat exchanger; 8. Cold distribution unit; 9. Mechanical refrigeration system; 10. Cold storage box; 11. Electric three-way valve; 12. Evaporator; 13. Compressor; 14. Condenser; 15. Throttling mechanism; 16. Electric valve; 17. Second heat exchanger; 18. Controller; 19. Temperature and humidity module; 20. Wind speed module; 21. Solar radiation module; 22. Wind direction module; 23. First circuit; 24. First pump body; 25. Heat exchange component; 26. Third heat exchanger; 27. Second circuit; 28. Cold storage pipeline. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0035] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0037] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0038] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0039] Embodiment 1

[0040] like Figure 1 As shown, a coupled refrigeration system includes a heat pipe heat dissipation system 1, a sky radiation cooling system 5 and a mechanical refrigeration system 9.

[0041] The heat pipe cooling system 1 includes a gravity heat pipe, which includes an evaporation end 3 and a condensation end 4. The evaporation end 3 is used to reduce the temperature of the component 2 to be cooled. The component 2 to be cooled includes a CPU and / or a GPU and / or an equipment cabinet.

[0042] The sky radiation cooling system 5 includes a first loop 23 and a cooling medium flowing in the pipeline of the first loop 23. The first loop 23 is also connected with a radiation cooling module 6, a first pump body 24 and a heat exchange component 25 in sequence. The first pump body 24 is used to drive the cooling medium to flow in the first loop 23. The heat exchange component 25 is coupled with the condensation end 4 of the gravity heat pipe to take away the heat of the condensation end 4 of the gravity heat pipe. The radiation cooling module 6 is used to transfer the heat absorbed by the cooling medium from the condensation end 4 of the gravity heat pipe to outer space. A third heat exchanger 26 is provided between the first pump body 24 and the input end of the heat exchange component 25.

[0043] The mechanical refrigeration system 9 includes a second circuit 27, in which a refrigerant flows, and the second circuit 27 is connected to an evaporator 12, a compressor 13, a condenser 14 and a throttling mechanism 15. The evaporator 12 is coupled to a third heat exchanger 26 to further cool the cooling medium before entering the heat exchange component 25 after being cooled by the radiation refrigeration module 6.

[0044] Sky radiation cooling technology is based on the principle of thermal radiation, that is, objects with higher temperatures will radiate energy to the outside world to lower the temperature. In the earth's atmosphere, there is an "atmospheric window" that is highly transparent to infrared radiation in the 8-13μm band, allowing infrared radiation from the earth's surface to pass through and be released into the universe. Since the temperature of the cosmic background is extremely low (about 2.7K), much lower than the average temperature of the earth's surface (about 290K), objects on the earth's surface can emit infrared radiation to the universe through this window, thereby achieving self-cooling, achieving zero-energy refrigeration, reducing carbon emissions, and is a negative carbon refrigeration technology that improves the system's carbon reduction performance. Sky radiation cooling is a commonly used method in the field of refrigeration, and the specific structural content will not be repeated in this application. By coupling radiation cooling, heat pipe cooling and mechanical refrigeration, the utilization rate of natural cold sources and the system's heat conduction capacity can be greatly improved. In particular, the evaporator 12 of the mechanical refrigeration system 9 can further cool the cooling medium after being cooled by the radiation refrigeration module 6 before entering the heat exchange component 25. It can make up for the defect under the working condition that the sky radiation cooling system 5 has a weak cooling effect on the cooling medium, thereby greatly reducing the system's energy consumption and reducing carbon emissions.

[0045] The first loop 23 is located at both ends of the radiation cooling module 6 and is respectively connected to electric three-way valves 11. The sky radiation cooling system 5 also includes a cold storage pipeline 28. Both ends of the cold storage pipeline 28 are respectively connected to the electric three-way valves 11. The cold storage pipeline 28 is connected to a cold storage tank 10, which is used to store the cooled cold medium.

[0046] By switching the electric three-way valve 11, the cold storage box 10 can switch between the cold storage mode and the cold supply mode, and is used to store the cold medium in the pipeline after being cooled by the radiation refrigeration module 6 in the cold storage box 10 or to extract the cold medium in the cold storage box 10 into the pipeline through the first pump body 24 according to the cooling effect of the radiation refrigeration module 6 and the temperature of the gravity heat pipe condensation section.

[0047] The condenser 14 of the mechanical refrigeration system 9 is also equipped with an enhanced heat dissipation branch, which is used to dissipate heat from the condenser 14. The enhanced heat dissipation branch can dissipate heat from the condenser 14, improve the cooling effect and capacity of the condenser 14 of the mechanical refrigeration system 9, thereby improving the energy efficiency of the mechanical refrigeration system 9 and reducing energy consumption.

[0048] One end of the enhanced heat dissipation branch is connected between the first pump body 24 and the third heat exchanger 26 in the first loop 23, and the other end is connected to the output end of the heat exchange component 25 in the first loop 23. The enhanced heat dissipation branch is connected to the electric valve 16 and the second heat exchanger 17, and the second heat exchanger 17 is used to dissipate heat from the condenser 14.

[0049] The medium-temperature cooling medium after being cooled by the radiation cooling module 6 in the first loop 23 can be divided into two paths. One path flows to the third heat exchanger 26, and after being cooled by the evaporator 12, it becomes a low-temperature cooling medium and then enters the heat exchange component 25 to cool the condensing end 4 of the gravity heat pipe, so that the evaporating end 3 of the gravity heat pipe can cool the cooling element 2 more efficiently. When the temperature of the condenser 14 of the mechanical refrigeration system 9 is too high, the electric valve 16 is opened, and the medium-temperature cooling medium is divided into another path and flows to the second heat exchanger 17 of the enhanced heat dissipation branch, so as to cool the mechanical refrigeration system 9. The high-temperature condenser 14 in the mechanical refrigeration system 9 dissipates heat, and the medium-temperature cooling medium becomes a high-temperature cooling medium and merges with the high-temperature cooling medium from the output end of the heat exchange component 25, and flows together in the first loop 23 for refrigeration through the radiation refrigeration module 6. In this cycle, the medium-temperature cooling medium is divided into two paths to dissipate heat to the heat pipe heat dissipation system 1 and the high-temperature cooling medium returns to the first loop 23 after the heat pipe heat dissipation system 1 dissipates heat, which can make full use of the sky radiation cooling system 5, which not only improves the cooling effect of the overall system on the cooling component 2, but also reduces energy consumption.

[0050] The heat exchange component 25 includes a cold distribution unit 8 and multiple first heat exchangers 7. The heat pipe heat dissipation system 1 includes multiple gravity heat pipes. The condensation end 4 of each gravity heat pipe is coupled to the first heat exchanger 7. The cold distribution unit 8 is used to distribute cold medium to each first heat exchanger 7.

[0051] The coupled refrigeration system also includes a control system, which includes a controller 18, a temperature and humidity sensing component, a wind speed module 20, a solar radiation module 21 and a wind direction module 22. The temperature and humidity sensing component includes a temperature and humidity module 19 for collecting outdoor temperature and humidity in a weather station and multiple temperature sensors arranged on various components in the system. The controller 18 controls the operation of the electric three-way valve 11, the electric valve 16 and the cooling capacity distribution unit 8 according to the temperature and humidity, wind speed, wind direction and solar radiation measured by the temperature and humidity sensing component, the wind speed module 20, the solar radiation module 21 and the wind direction module 22.

[0052] Embodiment 2

[0053] like Figure 1-2 As shown, the operation method of the coupled refrigeration system includes the following working modes:

[0054] Sky radiant cooling system 5 direct cooling mode: the evaporation end 3 of the gravity heat pipe absorbs the temperature of the component 2 to be cooled, and the heat is taken away by the cooling medium at the condensation end 4, and the radiation cooling module 6 transfers the heat of the cooling medium to the low-temperature outer space;

[0055] Cold storage mode of the cold storage box 10: When the temperature sensor measures that the temperature of the component to be cooled 2 is lower than the preset value, and the outflow temperature of the cooling medium in the radiation refrigeration module is lower than the temperature in the cold storage box, the controller 18 controls the switching of the electric three-way valve 11 to collect the cooling medium cooled by the sky radiation cooling system 5 into the cold storage box 10.

[0056] Cooling mode of the cold storage box 10: When the temperature of the coolant flowing out of the radiation refrigeration module 6 measured by the temperature sensor is higher than the set value and cannot be directly used for cooling, or the theoretical water outlet temperature of the radiation refrigeration module 6 calculated according to meteorological parameters is higher than the set value, the controller 18 controls the switching of the electric three-way valve 11, so that the coolant stored in the cold storage box 10 flows out of the cold storage pipeline 28 as the first pump body 24 is driven.

[0057] Mechanical refrigeration mode: When the temperature sensor measures that the temperature of the cooling medium entering the cooling distribution unit 8 is higher than the system preset value, the mechanical refrigeration system 9 is started to make the evaporator 12 perform secondary cooling on the cooling medium flowing through the third heat exchanger 26;

[0058] Enhanced heat dissipation mode: When the temperature sensor measures that the heat dissipation temperature of the condenser 14 of the mechanical refrigeration system 9 is higher than the system preset value, the electric valve 16 is opened to allow part of the cooling medium in the first circuit 23 to flow to the second heat exchanger 17 to cool the condenser 14.

[0059] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A coupled refrigeration system, characterized in that ,include: A heat pipe heat dissipation system (1), the heat pipe heat dissipation system (1) comprising a gravity heat pipe, the gravity heat pipe comprising an evaporation end (3) and a condensation end (4), the evaporation end (3) being used to reduce the temperature of a component to be cooled (2); A sky radiation cooling system (5), the sky radiation cooling system (5) comprising a first circuit (23) and a cooling medium flowing in a pipeline of the first circuit (23); the first circuit (23) is also connected in sequence to a radiation cooling module (6), a first pump body (24) and a heat exchange component (25); the first pump body (24) is used to drive the cooling medium to flow in the first circuit (23); the heat exchange component (25) is coupled to a condensation end (4) of a gravity heat pipe to remove heat from the condensation end (4) of the gravity heat pipe; the radiation cooling module (6) is used to transfer heat absorbed by the cooling medium from the condensation end (4) of the gravity heat pipe to outer space; and a third heat exchanger (26) is provided between the first pump body (24) and an input end of the heat exchange component (25); A mechanical refrigeration system (9) comprises a second circuit (27), a refrigerant flows in the second circuit (27), an evaporator (12), a compressor (13), a condenser (14) and a throttling mechanism (15) are connected to the second circuit (27), and the evaporator (12) is coupled to a third heat exchanger (26) for further cooling the cooling medium after being cooled by a radiation refrigeration module (6) and before entering a heat exchange component (25).

2. A coupled refrigeration system according to claim 1, characterized in that: The first circuit (23) is located at two ends of the radiation cooling module (6) and is respectively connected to an electric three-way valve (11). The sky radiation cooling system (5) further comprises a cold storage pipeline (28). Both ends of the cold storage pipeline (28) are respectively connected to the electric three-way valve (11). The cold storage pipeline (28) is connected to a cold storage box (10). The cold storage box (10) is used to store cooled cold medium.

3. A coupled refrigeration system according to claim 2, characterized in that: The condenser (14) of the mechanical refrigeration system (9) is also equipped with an enhanced heat dissipation branch, which is used to dissipate heat from the condenser (14).

4. A coupled refrigeration system according to claim 3, characterized in that: One end of the enhanced heat dissipation branch is connected between the first pump body (24) and the third heat exchanger (26) in the first circuit (23), and the other end is connected to the output end of the heat exchange component (25) in the first circuit (23). The enhanced heat dissipation branch is connected to an electric valve (16) and a second heat exchanger (17), and the second heat exchanger (17) is used to dissipate heat from the condenser (14).

5. A coupled refrigeration system according to claim 4, characterized in that: The heat exchange component (25) comprises a cold distribution unit (8) and a plurality of first heat exchangers (7); the heat pipe heat dissipation system (1) comprises a plurality of gravity heat pipes, the condensation end (4) of each gravity heat pipe is coupled to a first heat exchanger (7); the cold distribution unit (8) is used to distribute a cooling medium to each first heat exchanger (7).

6. A coupled refrigeration system according to claim 5, characterized in that: The coupled refrigeration system also includes a control system, which includes a controller (18), a temperature and humidity sensing component, a wind speed module (20), a solar radiation module (21) and a wind direction module (22). The temperature and humidity sensing component includes a temperature and humidity module (19) for collecting outdoor temperature and humidity at a weather station and a plurality of temperature sensors arranged on various components in the system. The controller (18) controls the operation of the electric three-way valve (11), the electric valve (16) and the cooling capacity distribution unit (8) according to the temperature and humidity, wind speed, wind direction and solar radiation measured by the temperature and humidity sensing component, the wind speed module (20), the solar radiation module (21) and the wind direction module (22).

7. A coupled refrigeration system according to claim 6, characterized in that: The parts to be cooled (2) include a CPU and / or a GPU and / or an equipment cabinet.

8. An operating method applicable to a coupled refrigeration system according to claim 7, characterized in that: The following working modes are included: Sky radiant cooling system (5) direct cooling mode: the evaporation end (3) of the gravity heat pipe absorbs the temperature of the part to be cooled (2), the heat is taken away by the cooling medium at the condensation end (4), and the radiation cooling module (6) transfers the heat of the cooling medium to the low-temperature outer space; Cold storage box (10) cold storage mode: when the temperature sensor measures that the temperature of the component to be cooled (2) is lower than a preset value, and the temperature of the cooling medium flowing out of the radiation cooling module is lower than the temperature in the cold storage box, the controller (18) controls the switching of the electric three-way valve (11) so that the cooling medium cooled by the sky radiation cooling system (5) is collected in the cold storage box (10); Cold storage box (10) cooling mode: when the temperature of the cooling medium flowing out of the radiation cooling module (6) measured by the temperature sensor is higher than a set value and cannot be directly used for cooling, or the theoretical outflow temperature of the radiation cooling module (6) calculated based on meteorological parameters is higher than a set value, the controller (18) controls the switching of the electric three-way valve (11) so that the cooling medium stored in the cold storage box (10) flows out of the cold storage pipeline (28) as the first pump body (24) is driven. Mechanical refrigeration mode: when the temperature sensor measures that the temperature of the cooling medium entering the cooling distribution unit (8) is higher than a system preset value, the mechanical refrigeration system (9) is started, so that the evaporator (12) performs secondary cooling on the cooling medium flowing through the third heat exchanger (26); Enhanced heat dissipation mode: When the temperature sensor measures that the heat dissipation temperature of the condenser (14) of the mechanical refrigeration system (9) is higher than the system preset value, the electric valve (16) is opened to allow part of the cooling medium in the first circuit (23) to flow to the second heat exchanger (17) to cool the condenser (14).

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