Refrigeration system, refrigeration apparatus, and control method

Abstract

The present disclosure relates to a refrigeration system, a refrigeration device and a control method, the refrigeration system comprising: a compressor (1), a condenser (2) and a heat exchange device (3), the condenser (2), the compressor (1) and the heat exchange device (3) being configured to form a refrigerant circulation loop in a refrigeration mode of the refrigeration system; an ejector (4), a nozzle of the ejector (4) being connected with the condenser (2), a suction zone of the ejector (4) being connected with the heat exchange device (3), the ejector (4) being configured to mix refrigerants from the heat exchange device (3) and the condenser (2) and to boost the pressure of the refrigerants; and a cold storage device (5), connected with an outlet of the ejector (4) and an inlet of the compressor (1) respectively, configured to store or release cold energy of the refrigerants from the outlet of the ejector (4).

Description

Technical Field

[0001] This disclosure relates to the field of refrigeration technology, and in particular to a refrigeration system, refrigeration equipment and control method. Background Technology

[0002] With the rapid development of information technology, data centers are increasingly demanding heat dissipation, and traditional heat dissipation technologies are gradually proving inadequate in high-density computing environments.

[0003] Liquid cooling technology is used in related technologies to dissipate heat from data centers. Liquid cooling technology has a stronger heat dissipation capacity, but the compressor in the existing cooling system consumes a lot of power, resulting in a large energy loss in the system. Summary of the Invention

[0004] In view of this, the present disclosure provides a refrigeration system, refrigeration equipment, and control method that can improve system performance.

[0005] In one aspect of this disclosure, a refrigeration system is provided, comprising:

[0006] In the refrigeration mode of the refrigeration system, the compressor, condenser, and heat exchanger are configured to form a refrigerant circulation loop.

[0007] The ejector, with its nozzle connected to the condenser and its ejector zone connected to the heat exchanger, is configured to mix the refrigerant from the heat exchanger and the condenser and increase the refrigerant pressure; and

[0008] The cold storage device, connected to the outlet of the ejector and the inlet of the compressor respectively, is configured to either store or release the cold energy of the refrigerant from the outlet of the ejector.

[0009] In some embodiments, the refrigeration system further includes a cold storage mode and a cold release mode. The cold storage device is configured to exchange heat with refrigerant from the outlet of the ejector in the cold storage mode of the refrigeration system and allow gaseous refrigerant to enter the compressor, and to exchange heat with refrigerant from the heat exchange device in the cold release mode and reduce the temperature of the refrigerant entering the heat exchange device.

[0010] In some embodiments, the refrigeration system further includes:

[0011] The first valve is connected to the outlet of the ejector, the inlet of the cold storage device, and the inlet of the heat exchange device, respectively.

[0012] The second valve is connected to the ejector zone of the ejector, the outlet of the cold storage device, and the outlet of the heat exchange device, respectively.

[0013] The pump body is connected to both the cold storage device and the heat exchange device; and

[0014] The controller, signal-connected to the first and second valves, is configured to switch the on / off states of the first and second valves to enable the compressor, condenser, heat exchanger, ejector, and cold storage device to form a refrigerant circulation loop in the cold storage mode of the refrigeration system, and to enable the pump, cold storage device, and heat exchanger to form a refrigerant circulation loop in the cold release mode of the refrigeration system.

[0015] In some embodiments, the refrigeration system further includes:

[0016] The third valve, located in the pipeline between the condenser outlet and the heat exchanger, is configured to regulate the refrigerant flow rate between the condenser outlet and the heat exchanger; and

[0017] The fourth valve, located in the pipeline between the outlet of the condenser and the nozzle of the ejector, is configured to regulate the refrigerant flow rate between the outlet of the condenser and the nozzle of the ejector.

[0018] The controller is signal-connected to the third and fourth valves and is configured to, according to external cooling demand, cause the third valve to adjust the refrigerant flow rate between the condenser outlet and the heat exchange device, and cause the fourth valve to adjust the refrigerant flow rate between the condenser outlet and the ejector nozzle.

[0019] In some embodiments, the refrigeration system further includes:

[0020] The regenerator, connected to both the outlet of the condenser and the heat exchange device, is configured to allow the refrigerant before it enters the heat exchange device to exchange heat with the refrigerant at the outlet of the condenser.

[0021] In some embodiments, the heat exchange device includes:

[0022] Heat exchangers are used to exchange heat with servers in data centers.

[0023] In another aspect of this disclosure, a refrigeration device is provided, comprising:

[0024] Refrigeration systems as described in any of the above embodiments.

[0025] In some embodiments, the heat exchange device includes:

[0026] The enclosure is used to house the server;

[0027] The heat exchanger, housed within the enclosure, is configured to exchange heat with the server.

[0028] In another aspect of this disclosure, a control method for a refrigeration system based on any of the above embodiments is provided, comprising:

[0029] In response to a situation where the cooling capacity of the heat exchanger exceeds the external cooling demand, the cold storage device exchanges heat with the refrigerant from the ejector outlet and stores the cold energy of the refrigerant from the ejector outlet; and

[0030] In response to compressor shutdown, the cold storage device exchanges heat with the refrigerant from the heat exchange device and releases the stored cold energy.

[0031] In some embodiments, the control method further includes:

[0032] Adjust the refrigerant flow rate between the condenser outlet and the heat exchange device, and the refrigerant flow rate between the condenser outlet and the ejector nozzle, respectively, according to the external cooling demand.

[0033] Therefore, according to the embodiments of this disclosure, by setting an ejector, the pressure of the low-pressure working fluid can be increased, the workload and power consumption of the compressor can be reduced, thereby achieving efficient energy utilization. The ejector, in conjunction with the cold storage device, can also distribute the state of the refrigerant more evenly, which helps to reduce the average heat exchange temperature difference in the heat exchange device, reduce energy loss, and improve the efficiency and performance of the refrigeration system. Attached Figure Description

[0034] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0035] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0036] Figure 1 These are schematic diagrams of the structure of some embodiments of the refrigeration system according to this disclosure;

[0037] Figure 2 This is a schematic diagram of the refrigerant cycle in a refrigeration mode according to some embodiments of the refrigeration system of this disclosure;

[0038] Figure 3 This is a schematic diagram of the refrigerant circulation in a cold storage mode according to some embodiments of the refrigeration system disclosed herein;

[0039] Figure 4 This is a schematic diagram of the refrigerant circulation in a cooling mode according to some embodiments of the refrigeration system disclosed herein;

[0040] Figure 5 This is a schematic diagram of the connection relationship according to some embodiments of the refrigeration system of this disclosure;

[0041] Figure 6 These are pressure-enthalpy diagrams based on some embodiments of the refrigeration system disclosed herein;

[0042] Figure 7 This is a flowchart of some embodiments of the control method according to the present disclosure.

[0043] In the picture:

[0044] 1. Compressor; 2. Condenser; 3. Heat exchanger; 31. Heat exchanger; 32. Housing; 33. Temperature and pressure sensor; 4. Ejector; 5. Cold storage device; 61. First valve; 62. Second valve; 63. Third valve; 64. Fourth valve; 65. Fifth valve; 66. Sixth valve; 67. Seventh valve; 7. Pump body; 8. Controller; 9. Regenerator; 10. Server; 11. Throttling valve.

[0045] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0046] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0047] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0048] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0049] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0050] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0051] With the rapid development of information technology, data centers are increasingly demanding heat dissipation, and traditional heat dissipation technologies are gradually proving inadequate in high-density computing environments.

[0052] Liquid cooling technology is used in related technologies to dissipate heat from data centers. Liquid cooling technology has a stronger heat dissipation capacity, but the compressor in the existing cooling system consumes a lot of power, resulting in a large energy loss in the system.

[0053] In view of this, in one aspect of the present disclosure, a refrigeration system is provided that can improve system performance.

[0054] Figure 1 These are schematic diagrams of the structure of some embodiments of the refrigeration system according to this disclosure. Figure 2 This is a schematic diagram of the refrigerant cycle in a refrigeration mode according to some embodiments of the refrigeration system of this disclosure. Figure 3 This is a schematic diagram of the refrigerant circulation in a cold storage mode according to some embodiments of the refrigeration system of this disclosure. Figure 4 This is a schematic diagram of the refrigerant circulation in the cooling mode according to some embodiments of the refrigeration system of this disclosure, with reference to... Figures 1-4 The refrigeration system includes a compressor 1, a condenser 2, a heat exchanger 3, an ejector 4, and a cold storage device 5.

[0055] In the refrigeration mode of the refrigeration system, the condenser 2, compressor 1 and heat exchange device 3 are configured to form a refrigerant circulation loop. At this time, the ejector 4 and cold storage device 5 are closed, and the heat exchange device 3 can cool external equipment.

[0056] In cooling mode, the superheated refrigerant vapor at the outlet of compressor 1 is condensed into liquid by condenser 2, then enters heat exchanger 3 through throttle valve 11, absorbing heat and cooling the external equipment at heat exchanger 3. The gaseous refrigerant then returns to compressor 1. The piping connections of the refrigeration system at this time are as follows: Figure 2 The thicker lines are shown in the middle.

[0057] The nozzle of the ejector 4 is connected to the condenser 2, and the ejector zone of the ejector 4 is connected to the heat exchange device 3. The ejector 4 is configured to mix the refrigerant from the heat exchange device 3 and the condenser 2 and increase the pressure of the refrigerant.

[0058] The ejector 4 can use the high-speed liquid refrigerant from the condenser 2 to eject the gaseous refrigerant from the heat exchange device 3. After the liquid refrigerant and the gaseous refrigerant are fully mixed in the mixing chamber of the ejector 4, they enter the diffuser chamber to decelerate and pressurize.

[0059] The ejector 4 uses the energy of the high-pressure refrigerant to eject the low-pressure refrigerant, converting pressure energy into kinetic energy and ejecting the low-pressure working fluid. Then, the kinetic energy is converted back into pressure energy to increase the pressure of the low-pressure working fluid. This converts the isenthalpic throttling process into an isentropic expansion process, recovering the expansion work and increasing the suction pressure of the compressor 1 to reduce the power consumption of the compressor 1.

[0060] The cold storage device 5 is connected to the outlet of the ejector 4 and the inlet of the compressor 1, and is configured to either store or release the cold energy of the refrigerant from the outlet of the ejector 4. The cold storage device 5 is equipped with a capacity monitor; when the capacity of the cold storage device 5 reaches 95%, the system switches to cooling mode.

[0061] The low-temperature refrigerant from the outlet of ejector 4 enters the heat exchange tube of the cold storage device 5, absorbs the heat of the cold storage refrigerant filling the heat exchange tube, and evaporates into gas, so that the cold storage device 5 releases heat to store cold energy.

[0062] When compressor 1 fails and stops or when electricity prices are high during the day, the cold storage device 5 can release cold. The high-temperature refrigerant flowing out of the heat exchange device 3 enters the heat exchange tube of the energy storage heat exchanger, absorbs the cold energy of the cold storage refrigerant filling the heat exchange tube, and condenses into liquid to reduce the temperature of the refrigerant.

[0063] In this embodiment, by setting the ejector 4, the pressure of the low-pressure working fluid can be increased, reducing the workload and power consumption of the compressor 1, thereby achieving efficient energy utilization. The cold storage device 5, in conjunction with the ejector 4, can distribute the state of the refrigerant more evenly, which helps to reduce the average heat exchange temperature difference in the heat exchange device 3, reduce energy loss, and improve the efficiency and performance of the refrigeration system.

[0064] refer to Figures 1-4 In some embodiments, the refrigeration system also has a cold storage mode and a cold release mode. The cold storage device 5 is configured to exchange heat with the refrigerant from the outlet of the ejector 4 in the cold storage mode of the refrigeration system and allow the gaseous refrigerant to enter the compressor 1, and to exchange heat with the refrigerant from the heat exchange device 3 in the cold release mode and reduce the temperature of the refrigerant entering the heat exchange device 3.

[0065] In the cold storage mode, the low-temperature refrigerant at the outlet of ejector 4 enters the heat exchange tube of the cold storage device 5, absorbs the heat of the cold storage refrigerant filling the heat exchange tube and evaporates into gas, so that the cold storage device 5 releases heat. The cold storage device 5 converts the gas-liquid working fluid at the outlet of ejector 4 into a gaseous state, which can prevent the compressor 1 from carrying liquid during suction.

[0066] In the cooling mode, the high-temperature refrigerant flowing out of the heat exchange device 3 enters the heat exchange tube of the energy storage heat exchanger, absorbs the cold energy of the cold storage refrigerant filling the heat exchange tube and condenses into liquid to reduce the temperature of the refrigerant.

[0067] In this embodiment, the cold storage device 5 can separate a portion of the refrigerant as a redundant reserve when the system meets the cooling demand of the terminal, so as to release the refrigerant when the system fails or stops. The cold storage device 5 can also prevent the compressor 1 from carrying liquid during suction, protect the compressor 1 from liquid slugging damage, and improve the efficiency of the refrigeration cycle.

[0068] Figure 5 This is a schematic diagram of the connection relationship according to some embodiments of the refrigeration system disclosed herein, with reference to... Figures 1-5 In some embodiments, the refrigeration system further includes: a first valve 61, a second valve 62, a pump body 7, and a controller 8.

[0069] The first valve 61 is connected to the outlet of the ejector 4, the inlet of the cold storage device 5, and the inlet of the heat exchange device 3, respectively. The second valve 62 is connected to the ejector zone of the ejector 4, the outlet of the cold storage device 5, and the outlet of the heat exchange device 3, respectively. The pump body 7 is connected to the cold storage device 5 and the heat exchange device 3, respectively.

[0070] The controller 8 is signal-connected to the first valve 61 and the second valve 62 and is configured to switch the on and off of the first valve 61 and the second valve 62 to form a refrigerant circulation loop with the compressor 1, condenser 2, heat exchanger 3, ejector 4 and cold storage device 5 in the cold storage mode of the refrigeration system, and to form a refrigerant circulation loop with the pump body 7, cold storage device 5 and heat exchanger 3 in the cold release mode of the refrigeration system.

[0071] When controller 8 switches the refrigeration system to cold storage mode, the first valve 61 connects the outlet of ejector 4 to the inlet of cold storage device 5, the second valve 62 connects the ejector zone of ejector 4 to the outlet of heat exchange device 3, and pump body 7 is shut off. At this time, the piping connection of the refrigeration system is as follows: Figure 3 The thicker lines are shown in the middle.

[0072] In the cold storage mode, the superheated refrigerant vapor at the outlet of compressor 1 is condensed into liquid by condenser 2 and then divided into two streams. One stream enters heat exchange device 3 after passing through throttle valve 11, and absorbs heat and cools the external equipment at heat exchange device 3. The other stream enters the nozzle of ejector 4 and expands into low-pressure, high-speed wet vapor with low dryness.

[0073] The saturated vapor from the outlet of heat exchanger 3 is injected into the ejector zone of ejector 4. After being fully mixed with the refrigerant entering from the nozzle of ejector 4 in the mixing chamber of ejector 4, it enters the diffuser chamber for deceleration and pressurization. Then it enters the cold storage device 5 to further absorb heat, so that the vapor entering compressor 1 is superheated saturated vapor, which avoids liquid carryover in compressor 1 and can improve the service life of compressor 1.

[0074] When controller 8 switches the refrigeration system to cooling mode, the first valve 61 connects the inlet of the cold storage device 5 to the inlet of the heat exchange device 3, and the second valve 62 connects the outlet of the cold storage device 5 to the outlet of the heat exchange device 3. Pump 7 is then activated. At this time, the piping connections of the refrigeration system are as follows: Figure 4 The thicker lines are shown in the middle.

[0075] In the cooling mode, compressor 1, condenser 2, and ejector 4 all stop working. The refrigerant circulates between heat exchanger 3 and cold storage device 5. After absorbing heat through evaporation in heat exchanger 3, the refrigerant enters cold storage device 5 and condenses to release heat, then continues to circulate back to heat exchanger 3 for cooling. Pump 7 serves as the power unit in cooling mode. Utilizing the cooling capacity of cold storage device 5, even for a short period after compressor 1 fails and stops, cooling can still be supplied to heat exchanger 3.

[0076] In this embodiment, the flow path of the refrigerant is adjusted by switching the first valve 61 and the second valve 62, so that the refrigeration system can flexibly switch between different modes according to external demand and / or the working condition of the compressor 1, thereby optimizing the energy configuration of the refrigeration system.

[0077] refer to Figures 1-5 In some embodiments, the refrigeration system further includes a third valve 63 and a fourth valve 64. The third valve 63 is disposed in a conduit between the outlet of the condenser 2 and the heat exchange device 3, and is configured to regulate the refrigerant flow rate between the outlet of the condenser 2 and the heat exchange device 3. The fourth valve 64 is disposed in a conduit between the outlet of the condenser 2 and the nozzle of the ejector 4, and is configured to regulate the refrigerant flow rate between the outlet of the condenser 2 and the nozzle of the ejector 4.

[0078] The controller 8 is signal-connected to the third valve 63 and the fourth valve 64 and is configured to, according to external cooling demand, cause the third valve 63 to adjust the refrigerant flow rate between the outlet of the condenser 2 and the heat exchange device 3, and cause the fourth valve 64 to adjust the refrigerant flow rate between the outlet of the condenser 2 and the nozzle of the ejector 4.

[0079] The third valve 63 and the fourth valve 64 can adjust the refrigerant content of the refrigeration system. Depending on the mode of the refrigeration system and the different cooling capacities required by the heat exchange device 3, they can adjust the refrigerant content from the outlet of the condenser 2 directly to the ejector 4 or into the heat exchange device 3.

[0080] When the heat exchange device 3 requires little refrigerant, more of the refrigerant after passing through the condenser 2 enters the ejector 4 through the fourth valve 64, and then enters the cold storage device 5 for storage. The remaining refrigerant flows to the heat exchange device 3 through the third valve 63 to cool the external equipment at the heat exchange device 3.

[0081] If the outlet of heat exchanger 3 contains a small amount of gas-liquid mixture, it will be converted into gaseous refrigerant after passing through ejector 4 and cold storage device 5, which can prevent compressor 1 from sucking in liquid and thus improve the performance of the system.

[0082] When the system needs to switch to cooling mode, the refrigerant supply from the outlet of condenser 2 to the ejector 4 can be cut off through the fourth valve 64, so that all the refrigerant at the outlet of condenser 2 flows to the heat exchange device 3.

[0083] In this embodiment, the refrigerant flow distribution of the two branches at the outlet of the condenser 2 is adjusted by the third valve 63 and the fourth valve 64, which can adjust the refrigerant supply in response to changes in external demand, ensure that the external equipment is within a suitable temperature range, and improve cooling efficiency and energy utilization.

[0084] refer to Figures 1-4 In some embodiments, the refrigeration system further includes a regenerator 9, which is connected to the outlet of the condenser 2 and the heat exchange device 3, respectively, and is configured to allow the refrigerant before entering the heat exchange device 3 to exchange heat with the refrigerant at the outlet of the condenser 2.

[0085] The regenerator 9 is located between the outlet of the condenser 2 and the inlet of the compressor 1. The liquid refrigerant at the outlet of the condenser 2 exchanges heat with the refrigerant before entering the heat exchange device 3, which further reduces the temperature of the refrigerant before it enters the heat exchange device 3, giving the refrigerant a greater degree of recooling. After passing through the expansion valve 11, it enters the heat exchange device 3 for heat exchange, which can improve the cooling effect of the heat exchange device 3 on external equipment and prevent unnecessary flashing of the refrigerant after passing through the expansion valve 11, reduce ineffective evaporation losses, and thus improve system efficiency.

[0086] In the cold storage mode, the regenerator 9 can optimize the gas-liquid two-phase state point entering the throttle valve 11 and the gas phase state point entering the ejector 4. The liquid refrigerant entering the liquid cooling device is a subcooled liquid, and the refrigerant entering the ejector 4 ejector zone is a superheated vapor.

[0087] The refrigeration system can also be equipped with a fifth valve 65, a sixth valve 66, and a seventh valve 67 to switch the connection relationship of the pipeline in different modes.

[0088] In this embodiment, by setting up a regenerator 9, heat exchange is effectively carried out by utilizing the temperature difference between refrigerants, so that the refrigerant entering the heat exchange device 3 is in a more suitable temperature and pressure state, which can reduce the irreversible losses caused by the isenthalpic expansion process, make the vapor compression cycle closer to the ideal reverse Carnot cycle, and improve the system refrigeration efficiency.

[0089] refer to Figures 1-4In some embodiments, the heat exchange device 3 includes a heat exchanger 31 for exchanging heat with the server 10 in the data center. The heat exchanger 31 includes, but is not limited to, a liquid cooling device, a water cooling device, or an air cooling device.

[0090] The heat exchange device 3 may also include a temperature and pressure sensor 33 and a housing 32. The temperature and pressure sensor 33 and the heat exchanger 31 are installed inside the housing 32. The server 10 may be installed inside the housing 32 so that the heat exchanger 31 can exchange heat with the server 10.

[0091] The temperature of server 10 rises, transferring heat to the coolant in heat exchanger 31. The coolant vaporizes under constant volume conditions, and the vapor rises to the top of the enclosure 32, where it exchanges heat with the refrigerant in heat exchanger 31. The vapor liquefies upon cooling and returns to the bottom of enclosure 32. After exchanging heat with the coolant, the temperature of the refrigerant rises and it circulates to condenser 2 to release heat.

[0092] In this embodiment, the cooling system of the coupled injector 4 combines the advantages of jet cooling and liquid cooling technologies, which can reduce the irreversible losses caused by the isenthalpic expansion process, make the vapor compression cycle closer to the ideal reverse Carnot cycle, and enable the heat exchange device 3 to provide a more reliable heat dissipation solution for high-density computing environments.

[0093] Figure 6 These are pressure-enthalpy diagrams based on some embodiments of the refrigeration system disclosed herein. Figure 6 a, b, c, c', d, e, e', f, g, h, i and Figure 3 The numbers a, b, c, e', d, e, e', f, g, h, and i correspond to each other.

[0094] From a to b, compressor 1 compresses low-pressure superheated vapor into high-pressure superheated vapor. From b to c, condenser 2 cools high-pressure superheated vapor into high-pressure saturated vapor. From c to c', regenerator 9 further cools the refrigerant into a high-pressure saturated liquid state. From c' to d, the refrigerant passes through throttle valve 11 from a high-pressure saturated liquid state to a low-pressure subcooled liquid state. From d to e, the refrigerant absorbs heat in the low-pressure subcooled liquid state and evaporates into a low-pressure superheated vapor state in heat exchange device 3. From e to e', regenerator 9 heats the refrigerant in the low-pressure superheated vapor state into a superheated vapor state.

[0095] From e' to g, the ejector 4 directs the saturated steam from the outlet of the heat exchanger 3 into the ejector zone of the ejector 4. From c to f, the refrigerant from the outlet of the condenser 2 enters the nozzle of the ejector 4 and expands into low-pressure, high-speed, low-dryness wet steam. From h to i, the refrigerant enters the diffuser chamber after being fully mixed in the mixing chamber of the ejector 4, and then decelerates and pressurizes. From i to a, the cold storage device 5 further absorbs heat, so that the steam entering the compressor 1 is superheated saturated steam.

[0096] refer to Figures 1-4In another aspect of the present disclosure, a refrigeration device is provided, including a refrigeration system as described in any of the above embodiments.

[0097] In this embodiment, the cooling system combines the advantages of jet cooling and liquid cooling technologies, possessing high heat dissipation and energy-saving capabilities, and can provide a more reliable heat dissipation solution for high-density computing environments.

[0098] In some embodiments, the heat exchange device 3 includes a housing 32 and a heat exchanger 31. The housing 32 is used to house the server 10, and the heat exchanger 31 is disposed within the housing 32 and configured to exchange heat with the server 10. The heat exchanger 31 is disposed within the housing 32, and the server 10 can be disposed within the housing 32 so that the heat exchanger 31 exchanges heat with the server 10.

[0099] The temperature of server 10 rises, transferring heat to the coolant in heat exchanger 31. The coolant vaporizes under constant volume conditions, and the vapor rises to the top of the enclosure 32, where it exchanges heat with the refrigerant in heat exchanger 31. The vapor liquefies upon cooling and returns to the bottom of enclosure 32. After exchanging heat with the coolant, the temperature of the refrigerant rises and it circulates to condenser 2 to release heat.

[0100] In this embodiment, the refrigeration equipment can reduce the irreversible losses caused by the isenthalpic expansion process, making the vapor compression cycle closer to the ideal reverse Carnot cycle, and enabling the refrigeration equipment to meet the increasing heat dissipation needs of data centers.

[0101] Figure 7 This is a flowchart of some embodiments of the control method according to this disclosure, with reference to... Figure 7 In another aspect of the present disclosure, a control method for a refrigeration system based on any of the above embodiments is provided, including steps S1 and S2.

[0102] In step S1, in response to the cooling capacity of the heat exchange device 3 being greater than the external cooling demand, the cold storage device 5 exchanges heat with the refrigerant from the outlet of the ejector 4 and stores the cold energy of the refrigerant from the outlet of the ejector 4.

[0103] In step S2, in response to the shutdown of compressor 1, the cold storage device 5 exchanges heat with the refrigerant from the heat exchange device 3 and releases the stored cold energy.

[0104] When the cooling capacity of heat exchanger 3 exceeds the external cooling demand, it can switch to cold storage mode to allow cold storage device 5 to store excess refrigerant in the system. In cold storage mode, the low-temperature refrigerant at the outlet of ejector 4 enters the heat exchange tubes of cold storage device 5, absorbs the heat of the cold storage refrigerant filling the heat exchange tubes, and evaporates into gas, causing cold storage device 5 to release heat. Cold storage device 5 converts the gas-liquid working fluid at the outlet of ejector 4 into a gaseous state, which can prevent liquid from being carried in the suction of compressor 1.

[0105] When compressor 1 is shut down or electricity prices are high during the day, the system can switch to cooling mode to release the cold energy stored in the cold storage device 5, ensuring stable system operation and energy saving. In cooling mode, the high-temperature refrigerant flowing out of heat exchange device 3 enters the heat exchange tubes of the energy storage heat exchanger, absorbs the cold energy of the cold storage refrigerant filling the heat exchange tubes, and condenses into liquid to lower the temperature of the refrigerant.

[0106] In this embodiment, while the system meets the cooling demand of the terminal, a portion of the refrigerant can be allocated as a redundant reserve for use in case of system failure or shutdown. When the compressor 1 fails or the electricity cost is high, the cold energy stored in the cold storage device 5 can be released, which can improve the efficiency of the refrigeration system and ensure the stable operation and energy-saving capability of the system.

[0107] refer to Figure 7 In some embodiments, the control method further includes step S3, in which the refrigerant flow rate between the outlet of the condenser 2 and the heat exchange device 3 and the refrigerant flow rate between the outlet of the condenser 2 and the nozzle of the ejector 4 are adjusted according to the external cooling demand.

[0108] In this embodiment, by adjusting the refrigerant flow rate, the refrigeration system can flexibly switch between different modes according to external demand and / or the operating status of compressor 1, thereby optimizing the energy configuration of the refrigeration system.

[0109] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0110] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A refrigeration system, characterized in that, include: The compressor (1), condenser (2) and heat exchanger (3) are configured to form a refrigerant circulation loop in the refrigeration mode of the refrigeration system. The ejector (4) has its nozzle connected to the condenser (2) and its ejector zone connected to the heat exchange device (3). The ejector (4) is configured to mix refrigerant from the heat exchange device (3) and the condenser (2) and increase the pressure of the refrigerant. and The cold storage device (5) is connected to the outlet of the ejector (4) and the inlet of the compressor (1) respectively, and is configured to store the cold energy of the refrigerant from the outlet of the ejector (4) or release the cold energy. The refrigeration system also has a cold storage mode and a cold release mode. The cold storage device (5) is configured to exchange heat with the refrigerant from the outlet of the ejector (4) in the cold storage mode of the refrigeration system and allow the gaseous refrigerant to enter the compressor (1), and to exchange heat with the refrigerant from the heat exchange device (3) in the cold release mode and reduce the temperature of the refrigerant entering the heat exchange device (3). The refrigeration system also includes: The first valve (61) is connected to the outlet of the ejector (4), the inlet of the cold storage device (5) and the inlet of the heat exchange device (3), respectively. The second valve (62) is connected to the ejector zone of the ejector (4), the outlet of the cold storage device (5), and the outlet of the heat exchange device (3), respectively. The pump body (7) is connected to the cold storage device (5) and the heat exchange device (3) respectively; and The controller (8), which is signal-connected to the first valve (61) and the second valve (62), is configured to switch the on / off state of the first valve (61) and the second valve (62) to enable the compressor (1), the condenser (2), the heat exchanger (3), the ejector (4) and the cold storage device (5) to form a refrigerant circulation loop in the cold storage mode of the refrigeration system, and to enable the pump body (7), the cold storage device (5) and the heat exchanger (3) to form a refrigerant circulation loop in the cold release mode of the refrigeration system.

2. The refrigeration system as described in claim 1, characterized in that, Also includes: A third valve (63), located in the pipeline between the outlet of the condenser (2) and the heat exchange device (3), is configured to regulate the refrigerant flow rate between the outlet of the condenser (2) and the heat exchange device (3); and The fourth valve (64), located in the pipeline between the outlet of the condenser (2) and the nozzle of the ejector (4), is configured to regulate the refrigerant flow rate between the outlet of the condenser (2) and the nozzle of the ejector (4). The controller (8) is signal-connected to the third valve (63) and the fourth valve (64) and is configured to, according to external cooling demand, cause the third valve (63) to adjust the refrigerant flow rate between the outlet of the condenser (2) and the heat exchange device (3), and cause the fourth valve (64) to adjust the refrigerant flow rate between the outlet of the condenser (2) and the nozzle of the ejector (4).

3. The refrigeration system as described in claim 1 or 2, characterized in that, Also includes: The regenerator (9), connected to the outlet of the condenser (2) and the heat exchange device (3) respectively, is configured to allow the refrigerant before entering the heat exchange device (3) to exchange heat with the refrigerant at the outlet of the condenser (2).

4. The refrigeration system as described in claim 1, characterized in that, The heat exchange device (3) includes: A heat exchanger (31) is used to exchange heat with the server (10) in the data center.

5. A refrigeration device, characterized in that, include: The refrigeration system as described in any one of claims 1 to 4.

6. The refrigeration equipment as described in claim 5, characterized in that, The heat exchange device (3) includes: The enclosure (32) is used to house the server (10); A heat exchanger (31), located inside the enclosure (32), is configured to exchange heat with the server (10).

7. A control method for the refrigeration system according to any one of claims 1 to 4, characterized in that, include: In response to the cooling capacity of the heat exchange device (3) being greater than the external cooling demand, the cold storage device (5) exchanges heat with the refrigerant from the outlet of the ejector (4) and stores the cold capacity of the refrigerant from the outlet of the ejector (4). as well as In response to the shutdown of the compressor (1), the cold storage device (5) exchanges heat with the refrigerant from the heat exchange device (3) and releases the stored cold energy.

8. The control method as described in claim 7, characterized in that, Also includes: According to the external cooling demand, the refrigerant flow rate between the outlet of the condenser (2) and the heat exchange device (3) and the refrigerant flow rate between the outlet of the condenser (2) and the nozzle of the ejector (4) are adjusted respectively.

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