Refrigeration system and energy storage system

Abstract

This application discloses a refrigeration system and an energy storage system, belonging to the field of thermal management technology. The refrigeration system includes: a refrigeration cycle, comprising a compressor, a condenser, and a first heat exchanger; a heat dissipation cycle, comprising a drive pump, a second heat exchanger, and a load flow path; a second heat exchanger, wherein the first heat exchanger is selectively connected to the outlet of the second heat exchanger, and when connected, the second heat exchanger is used for heat exchange with the medium between the compressor outlet and the inlet of the first heat exchanger; wherein the first heat exchanger is used to refrigerate the second heat exchanger. According to the refrigeration system of this application, by selectively connecting the first heat exchanger to the outlet of the second heat exchanger, the subcooling degree of the refrigerant medium in the first heat exchanger can be increased under high-temperature environments, thereby improving the energy efficiency of the refrigeration system and reducing energy consumption costs.

Description

Technical Field

[0001] This application belongs to the field of thermal management technology, and particularly relates to a refrigeration system and an energy storage system. Background Technology

[0002] During the operation of an energy storage system, the heat continuously generated by the energy storage device needs to be dissipated in a timely manner through a cooling system. However, under high-temperature conditions, due to the high ambient temperature, the condensation capacity of the cooling system is insufficient, resulting in a decrease in the overall heat dissipation efficiency of the energy storage system and an increase in energy consumption, which affects the performance and stability of the energy storage system. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes a refrigeration system that can enhance the condensing capacity of the refrigeration cycle, reduce compressor power consumption, increase the subcooling of the refrigerant flowing into the first heat exchanger, increase the cooling capacity provided by the refrigeration cycle to the heat dissipation cycle, thereby improving the energy efficiency of the refrigeration system and reducing energy consumption costs, without the need to introduce a refrigeration unit outside the refrigeration system.

[0004] In a first aspect, this application provides a refrigeration system, comprising: The refrigeration cycle includes the first path of the compressor, condenser, and first heat exchanger; The heat dissipation cycle includes the drive pump, the second path of the first heat exchanger, and the load flow path; A second heat exchanger, wherein a first path of the second heat exchanger is selectively connected to the outlet of a second path of the first heat exchanger, and when connected, the second path of the second heat exchanger is used for heat exchange with the medium between the outlet of the compressor and the inlet of the first path of the first heat exchanger. The first path of the first heat exchanger is used to cool the second path of the first heat exchanger.

[0005] According to the refrigeration system of this application, by selectively connecting the first path of the second heat exchanger to the outlet of the second path of the first heat exchanger, and transferring the cooling capacity of the low-temperature heat dissipation medium to the refrigeration medium, the condensing capacity of the refrigeration cycle can be enhanced when the ambient temperature is high and the condenser's condensing capacity decreases, thereby reducing the compressor's power consumption, increasing the subcooling of the refrigeration medium flowing into the first path of the first heat exchanger, increasing the cooling capacity provided by the refrigeration cycle to the heat dissipation cycle, and thus improving the energy efficiency of the refrigeration system and reducing energy consumption costs, without the need to introduce a refrigeration unit outside the refrigeration system.

[0006] According to one embodiment of this application, the inlet of the first path of the second heat exchanger may be selectively connected to the outlet of the second path of the first heat exchanger, and the outlet of the first path of the second heat exchanger is connected to the inlet of the load flow path. or, The inlet of the first path of the second heat exchanger may be selectively connected to the outlet of the second path of the first heat exchanger, and the outlet of the first path of the second heat exchanger is connected to the inlet of the drive pump.

[0007] According to one embodiment of this application, the heat dissipation cycle further includes: The first three-way valve has its first port connected to the outlet of the second path of the first heat exchanger, its second port connected to the inlet of the first path of the second heat exchanger, and its third port connected to the inlet of the load flow path. The first valve port of the first three-way valve is connected to the third valve port of the first three-way valve, and the first valve port of the first three-way valve is selectively connected to the second valve port of the first three-way valve.

[0008] According to one embodiment of this application, the refrigeration system has a first operating mode and a second operating mode; In the first operating mode, the first path of the second heat exchanger is disconnected from the outlet of the second path of the first heat exchanger; In the second operating mode, the first path of the second heat exchanger is connected to the outlet of the second path of the first heat exchanger; When the ambient temperature is determined to be higher than the target temperature, the refrigeration system enters the second operating mode.

[0009] According to one embodiment of this application, when the first path of the second heat exchanger is connected to the outlet of the second path of the first heat exchanger, the flow rate of the first path of the second heat exchanger is less than half of the flow rate of the second path of the first heat exchanger.

[0010] According to one embodiment of this application, the refrigeration cycle further includes a dryer filter and a throttling device, and the compressor, the condenser, the dryer filter, the throttling device and the first heat exchanger are connected end to end in a first path; And / or, The heat dissipation cycle also includes a heat dissipation medium storage tank. The drive pump, the second path of the first heat exchanger, and the load flow path are connected in sequence. The heat dissipation medium storage tank is connected to the inlet of the drive pump.

[0011] According to one embodiment of this application, the second path of the second heat exchanger is used for heat exchange with the air flow path of the condenser.

[0012] According to one embodiment of this application, the second path of the second heat exchanger is also an air flow path, and the second heat exchanger is arranged upstream of the air inlet direction of the condenser.

[0013] According to one embodiment of this application, the second path of the second heat exchanger is connected in parallel with the condenser and may be selectively connected to the refrigeration cycle.

[0014] According to one embodiment of this application, the refrigeration cycle further includes: The second three-way valve has its first port connected to the outlet of the compressor, its second port connected to the inlet of the second heat exchanger, and its third port connected to the inlet of the condenser. The first valve port of the second three-way valve is connected to the third valve port of the second three-way valve, and the first valve port of the first three-way valve is selectively connected to the second valve port of the first three-way valve.

[0015] Secondly, this application provides an energy storage system, comprising: Refrigeration system as described in any of the above; An energy storage device, wherein the load flow path is used to dissipate heat from the energy storage device.

[0016] According to the energy storage system provided in the embodiments of this application, by adopting the above-mentioned refrigeration system, the condensing capacity of the refrigeration cycle can be enhanced when the ambient temperature is high and the condenser's condensing capacity decreases, thereby reducing the compressor's power consumption, increasing the subcooling of the refrigerant flowing into the first heat exchanger, increasing the cooling capacity provided by the refrigeration cycle to the heat dissipation cycle, thereby improving the energy efficiency of the refrigeration system and reducing energy consumption costs, and without the need to introduce a refrigeration unit outside the refrigeration system.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is one of the structural schematic diagrams of the refrigeration system provided in the embodiments of this application; Figure 2 This is the second schematic diagram of the refrigeration system provided in the embodiments of this application.

[0019] Figure label: Refrigeration system 100; First heat exchanger 101, compressor 102, condenser 103, dryer filter 104, throttling device 105, second three-way valve 106; Second heat exchanger 107; Drive pump 108, load flow path 109, heat dissipation medium storage tank 110, first three-way valve 111; Temperature sensor 112, condenser fan 113. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] The following is for reference. Figure 1 and Figure 2 This application describes an energy storage system and a refrigeration system 100 according to embodiments of the present application.

[0022] An energy storage system is an integrated system that converts electrical energy into other forms of energy, such as chemical energy, thermal energy, or mechanical energy, for storage, and releases it back into electrical energy when needed.

[0023] The energy storage system includes a refrigeration system 100 and energy storage devices. In addition, the energy storage system may also include an energy conversion and control system, safety protection devices, and monitoring and communication modules.

[0024] The refrigeration system 100 is an artificial heating device that transfers heat from an area or object that needs to be cooled to the outside, thereby generating and maintaining a low temperature effect on the target area or object.

[0025] Energy storage devices are physical devices that store input energy in a specific medium through physical mechanisms such as electrochemical, mechanical, or electromagnetic methods, and release it when needed. Energy storage devices can be batteries, flywheels, or supercapacitors, among others.

[0026] The energy storage device includes a load, which is the object in the refrigeration system 100 that requires heat exchange.

[0027] In the energy storage device, the load flow path 109 is used for heat exchange in the energy storage device. In other words, the load flow path 109 has a heat exchange function and can exchange or heat the energy storage device.

[0028] This application also provides a refrigeration system 100.

[0029] like Figure 1 and Figure 2 As shown, the refrigeration system 100 includes a refrigeration cycle and a heat dissipation cycle.

[0030] A refrigeration cycle is a cycle in which a system generates cooling capacity by using a refrigerant to absorb externally generated cooling capacity.

[0031] The refrigerant can be Freon or ammonia, etc.

[0032] like Figure 1 and Figure 2 As shown, the refrigeration cycle may include a first path of a compressor 102, a condenser 103, and a first heat exchanger 101.

[0033] Compressor 102 is a fluid machine that compresses a gaseous refrigerant medium through mechanical work. Compressor 102 can compress a low-temperature, low-pressure gaseous refrigerant medium into a high-temperature, high-pressure gas, and can drive the refrigerant medium to flow in the refrigeration cycle.

[0034] The condenser 103 is a pressure-bearing heat exchange device that uses an external cooling medium to remove the superheated sensible heat and latent heat of condensation of the gaseous refrigerant, causing it to transform into a medium-temperature, high-pressure liquid. For example... Figure 1 and Figure 2 As shown, the condenser 103 can be air-cooled. Of course, the condenser 103 can also be evaporative or water-cooled, etc.

[0035] The first heat exchanger 101 is a dual-path heat exchanger with a first path and a second path, and the two paths can be isolated for heat exchange. The first heat exchanger 101 can be a plate heat exchanger or a shell-and-tube heat exchanger.

[0036] The heat dissipation cycle can transfer the cooling energy generated by the refrigeration cycle to the load flow path 109 through the heat dissipation medium, and bring the heat absorbed by the heat dissipation medium in the load flow path 109 back to the refrigeration cycle through the heat dissipation medium.

[0037] The heat dissipation medium can be deionized water, ethylene glycol aqueous solution, or salt water, etc.

[0038] like Figure 1 and Figure 2 As shown, the heat dissipation cycle includes a drive pump 108, a second path of the first heat exchanger 101, and a load flow path 109.

[0039] The drive pump 108 is a centrifugal or positive displacement fluid transport device that applies kinetic energy to a fluid through impeller rotation, converting its mechanical energy into fluid pressure energy. The drive pump 108 can overcome pipeline resistance, such as frictional losses and valve pressure drops, to provide flow power for the heat dissipation medium, maintain the flow rate of the heat dissipation medium in the heat dissipation cycle, and efficiently transport cooling capacity from the first heat exchanger 101 to the load flow path 109. The drive pump 108 can be a variable frequency pump, capable of dynamically adjusting the flow rate of the heat dissipation medium according to changes in the heat load of the load flow path 109, thus avoiding energy waste.

[0040] The first path of the first heat exchanger 101 is used to cool the second path of the first heat exchanger 101. That is, the first heat exchanger 101 is the energy exchange hub between the refrigeration cycle and the heat dissipation cycle. Inside the first heat exchanger 101, the refrigerant in the first path of the first heat exchanger 101 transfers cold energy to the heat dissipation medium in the second path of the first heat exchanger 101, and the heat dissipation medium in the second path of the first heat exchanger 101 transfers heat to the refrigerant in the first path of the first heat exchanger 101.

[0041] like Figure 1 and Figure 2 As shown, the refrigeration system 100 includes a second heat exchanger 107.

[0042] The second heat exchanger 107 is a dual-path heat exchanger with a first path and a second path, and the two paths can be isolated for heat exchange.

[0043] like Figure 1 and Figure 2 As shown, the first path of the second heat exchanger 107 can be selectively connected to the outlet of the second path of the first heat exchanger 101. When connected, the second path of the second heat exchanger 107 is used for heat exchange with the medium between the outlet of the compressor 102 and the inlet of the first path of the first heat exchanger 101.

[0044] A flow path switching device exists between the inlet of the first path of the second heat exchanger 107 and the outlet of the second path of the first heat exchanger 101. When the ambient temperature is high, the heat dissipation medium that absorbs cold energy and decreases in temperature in the second path of the first heat exchanger 101 can be diverted to the first path of the second heat exchanger 107 through the flow path switching device. When the second path of the first heat exchanger 101 is connected to its outlet, the medium in the second path of the second heat exchanger 107 absorbs the cold energy of the heat dissipation medium in the first path of the second heat exchanger 107 and transfers the cold energy to the refrigerant medium discharged from the compressor 102 that is about to enter the first path of the first heat exchanger 101, thereby increasing the subcooling of the refrigerant medium about to enter the first path of the first heat exchanger 101. The medium in the second path of the second heat exchanger 107 can be the external cooling medium of the condenser 103 or a portion of the refrigerant flowing out of the compressor 102 outlet.

[0045] In related technologies, when the ambient temperature is high, the temperature of the external cooling medium of the condenser rises and the cooling capacity it can provide is insufficient, which causes the condensation temperature and condensation pressure of the refrigerant in the condenser to rise, the power consumption of the compressor to increase, the cooling capacity that the refrigeration cycle can provide to decrease, resulting in reduced energy efficiency of the refrigeration system and increased energy consumption costs.

[0046] In this embodiment, when the ambient temperature is high, a portion of the low-temperature heat dissipation medium generated by the heat dissipation cycle can be diverted to the first path of the second heat exchanger 107, allowing it to directly or indirectly release cooling capacity to the refrigerant flowing out of the compressor 102 outlet, thus supplementing the insufficient cooling capacity released by the condenser 103 to the refrigerant through the higher-temperature external cooling medium. This process can increase the subcooling of the refrigerant flowing into the first path of the first heat exchanger 101, reduce the power consumption of the compressor 102, increase the cooling capacity provided by the refrigeration cycle to the heat dissipation cycle, increase the energy efficiency of the refrigeration system 100, and reduce energy consumption costs, without the need to introduce a refrigeration unit outside the refrigeration system 100.

[0047] When the ambient temperature is low, the heat dissipation medium that absorbs cold energy and has a lower temperature in the second path of the first heat exchanger 101 can not be diverted to the first path of the second heat exchanger 107, but instead all flow into the load flow path 109. This allows the load flow path 109 to obtain a larger flow of low-temperature heat dissipation medium, which can reduce the energy consumption of the drive pump 108 and reduce the amount of cold energy required by the refrigeration cycle, thereby optimizing the overall energy efficiency of the refrigeration system 100.

[0048] The refrigeration system 100 provided in this embodiment works by coordinating a refrigeration cycle and a heat dissipation cycle. Its working principle is as follows: In the refrigeration cycle, the compressor 102 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas. The high-temperature, high-pressure gaseous refrigerant enters the second path of the condenser 103 / condenser 103 or the second heat exchanger 107 to release heat and condense into a high-pressure liquid. The liquid refrigerant is depressurized and becomes a low-temperature, low-pressure gas-liquid mixture, which flows into the first path of the first heat exchanger 101 and absorbs the heat from the heat dissipation medium flowing through the second path of the first heat exchanger 101. The gas-liquid mixture evaporates into a gaseous state and flows into the compressor 102, thus completing the refrigeration cycle.

[0049] In the heat dissipation cycle, the drive pump 108 propels the heat dissipation medium to flow. The heat dissipation medium enters the second path of the first heat exchanger 101 and absorbs the cold energy of the refrigerant flowing through the first path of the first heat exchanger 101, thus cooling down. The low-temperature heat dissipation medium flows through the load flow path 109 and absorbs heat. Optionally, a portion of the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 can be diverted to the first path of the second heat exchanger 107, transferring the cold energy to the medium flowing through the second path of the second heat exchanger 107, i.e., the external cooling medium of the condenser 103 or the refrigerant flowing out of the compressor 102 in the refrigeration cycle. This portion of the heat dissipation medium absorbs heat and rises in temperature before flowing back into the heat dissipation cycle loop.

[0050] According to the refrigeration system 100 provided in the embodiments of this application, by selectively connecting the first path of the second heat exchanger 107 to the outlet of the second path of the first heat exchanger 101, and transferring the cooling capacity of the low-temperature heat dissipation medium to the refrigeration medium, the condensing capacity of the refrigeration cycle can be enhanced when the ambient temperature is high and the condensing capacity of the condenser 103 decreases, thereby reducing the power consumption of the compressor 102, increasing the subcooling of the refrigeration medium flowing into the first path of the first heat exchanger 101, increasing the cooling capacity provided by the refrigeration cycle to the heat dissipation cycle, thereby improving the energy efficiency of the refrigeration system 100 and reducing energy consumption costs, and without the need to introduce a refrigeration unit outside the refrigeration system 100.

[0051] Correspondingly, according to the energy storage system provided in the embodiments of this application, by adopting the above-mentioned refrigeration system 100, the condensing capacity of the refrigeration cycle can be enhanced when the ambient temperature is high and the condensing capacity of the condenser 103 decreases, thereby reducing the power consumption of the compressor 102, increasing the subcooling of the refrigerant flowing into the first heat exchanger 101, increasing the cooling capacity provided by the refrigeration cycle to the heat dissipation cycle, thereby improving the energy efficiency of the refrigeration system 100 and reducing energy consumption costs, and without the need to introduce a refrigeration unit outside the refrigeration system 100.

[0052] In some embodiments, the first path of the second heat exchanger 107 can be connected in at least one of the following ways: Firstly, the inlet of the first path of the second heat exchanger 107 can be selectively connected to the outlet of the second path of the first heat exchanger 101, and the outlet of the first path of the second heat exchanger 107 is connected to the inlet of the load flow path 109.

[0053] In this embodiment, such as Figure 1 and Figure 2 As shown, the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 can be selectively diverted out of the heat dissipation circulation loop and flow into the first path of the second heat exchanger 107, and transfer the cooling capacity directly or indirectly to the cooling medium. The heat dissipation medium that loses a certain amount of cooling capacity flows into the heat dissipation circulation loop from the first path of the second heat exchanger 107, and merges with the low-temperature heat dissipation medium flowing directly out of the first path of the second heat exchanger 107 in the heat dissipation circulation loop, and together they flow into the load flow path 109 and absorb heat.

[0054] After the diverted heat dissipation medium releases its cooling capacity in the second heat exchanger 107, some cooling capacity may still remain. This diverted heat dissipation medium then re-enters the load flow path 109 to absorb heat a second time, achieving a two-stage utilization of the cooling capacity of the diverted heat dissipation medium. Simultaneously, the diverted heat dissipation medium participates in the cooling capacity transfer of the load flow path 109, resulting in a larger flow rate of the heat dissipation medium flowing into the load flow path 109. This allows for a more uniform flow distribution, reducing heat dissipation blind spots and localized overheating of the energy storage device caused by insufficient flow.

[0055] Secondly, the inlet of the first path of the second heat exchanger 107 can be selectively connected to the outlet of the second path of the first heat exchanger 101, and the outlet of the first path of the second heat exchanger 107 is connected to the inlet of the drive pump 108.

[0056] In this embodiment, the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 can be selectively diverted out of the heat dissipation circulation loop and flow into the first path of the second heat exchanger 107, and transfer the cooling capacity directly or indirectly to the cooling medium. The heat dissipation medium that loses a certain amount of cooling capacity flows into the heat dissipation circulation loop from the first path of the second heat exchanger 107 and merges with the heat dissipation medium flowing out of the load flow path 109 in the heat dissipation circulation loop, and flows into the drive pump 108 together.

[0057] After the diverted heat dissipation medium releases its cooling capacity in the second heat exchanger 107, it may not have enough remaining cooling capacity. Therefore, the diverted heat dissipation medium will not enter the load flow path 109 and will not absorb the cooling capacity of the heat dissipation medium flowing into the load flow path 109. In this way, the temperature of the heat dissipation medium flowing into the load flow path 109 is lower, and the temperature difference between the low-temperature heat dissipation medium and the load is increased, which can improve the heat transfer rate of the heat dissipation medium in the load flow path 109.

[0058] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat dissipation cycle includes a first three-way valve 111.

[0059] The first three-way valve 111 has three valve ports, namely the first valve port, the second valve port and the third valve port.

[0060] like Figure 1 and Figure 2 As shown, the first valve port of the first three-way valve 111 is connected to the outlet of the second path of the first heat exchanger 101, the second valve port of the first three-way valve 111 is connected to the inlet of the first path of the second heat exchanger 107, and the third valve port of the first three-way valve 111 is connected to the inlet of the load flow path 109.

[0061] In other words, the first port of the first three-way valve 111 is the inlet of the first three-way valve 111, capable of receiving the low-temperature heat dissipation medium from the second path of the first heat exchanger 101. The second port of the first three-way valve 111 is the outlet of the first three-way valve 111, which, when connected, guides the heat dissipation medium to the first path of the second heat exchanger 107. The third port of the first three-way valve 111 is the outlet of the first three-way valve 111, capable of delivering the heat dissipation medium to the inlet of the load flow path 109.

[0062] The first valve port of the first three-way valve 111 is connected to the third valve port of the first three-way valve 111, and the first valve port of the first three-way valve 111 is selectively connected to the second valve port of the first three-way valve 111.

[0063] The first outlet of the second heat exchanger 107 can be connected between the third valve port of the first three-way valve 111 and the inlet of the load flow path 109, or the first outlet of the second heat exchanger 107 can be connected between the outlet of the load flow path 109 and the inlet of the drive pump 108.

[0064] In this way, the low-temperature heat dissipation medium from the second path of the first heat exchanger 101 can flow entirely through the first port of the first three-way valve 111 to the third port of the first three-way valve 111, thereby flowing entirely into the load flow path 109. Alternatively, after the low-temperature heat dissipation medium from the second path of the first heat exchanger 101 passes through the first port of the first three-way valve 111, a portion of the low-temperature heat dissipation medium flows to the third port of the first three-way valve 111 and directly into the load flow path 109, while another portion flows to the second port of the first three-way valve 111 and flows into the first path of the second heat exchanger 107 to release cooling capacity. Subsequently, this portion of the heat dissipation medium can flow to the pipe between the third port of the first three-way valve 111 and the inlet of the load flow path 109 to enter the heat dissipation circulation loop, or this portion of the heat dissipation medium can flow to the pipe between the outlet of the load flow path 109 and the inlet of the drive pump 108 to enter the heat dissipation circulation loop.

[0065] Of course, the heat dissipation cycle can also include two independent valves, namely a first valve and a second valve. The first valve can be located between the inlet of the first path of the second heat exchanger 107 and the outlet of the second path of the first heat exchanger 101, and the second valve can be located between the inlet of the load flow path 109 and the outlet of the second path of the first heat exchanger 101. The first valve can selectively connect the inlet of the first path of the second heat exchanger 107 to the outlet of the second path of the first heat exchanger 101, while the second valve always connects the inlet of the load flow path 109 to the outlet of the second path of the first heat exchanger 101.

[0066] In some embodiments, the refrigeration system 100 has a first operating mode and a second operating mode, and when it is determined that the ambient temperature is higher than the target temperature, the refrigeration system 100 enters the second operating mode.

[0067] like Figure 1 and Figure 2 As shown, a temperature sensor 112 can be installed in the external environment of the condenser 103 to monitor the ambient temperature. For example, if the condenser 103 is an air-cooled condenser that uses air convection for heat dissipation, the temperature sensor 112 can be installed in the stable airflow area on the air inlet side of the condenser 103; if the condenser 103 is a water-cooled condenser that uses water for heat dissipation, the temperature sensor 112 can be installed near the inlet of the cooling water pipe of the condenser 103.

[0068] The target temperature can be set based on engineering experience or specifically determined according to the actual product layout site, such as 40℃ or 45℃. When the ambient temperature exceeds this value, the condensing pressure is high, the compressor 102 consumes a lot of energy, the condenser 103 has poor cooling effect, and the refrigeration system 100 has low energy efficiency.

[0069] In the first operating mode, the ambient temperature is less than or equal to the target temperature. In the second operating mode, the ambient temperature is greater than the target temperature.

[0070] In the first operating mode, the outlet of the first path of the second heat exchanger 107 is disconnected from the outlet of the second path of the first heat exchanger 101. In the second operating mode, the outlet of the first path of the second heat exchanger 107 is connected to the outlet of the second path of the first heat exchanger 101.

[0071] In other words, when the ambient temperature is less than or equal to the target temperature, the refrigeration system 100 enters the first operating mode. The low-temperature heat dissipation medium flowing out from the second path of the first heat exchanger 101 does not flow to the first path of the second heat exchanger 107 through the first three-way valve 111 or other valves, but flows entirely to the load flow path 109, allowing the load flow path 109 to obtain a larger flow rate of low-temperature heat dissipation medium's cooling capacity. When the ambient temperature is greater than the target temperature, the refrigeration system 100 enters the second operating mode. A portion of the low-temperature heat dissipation medium flowing out from the second path of the first heat exchanger 101 can be diverted through the first three-way valve 111 or other valves to the first path of the second heat exchanger 107, releasing cooling capacity to the medium between the outlet of the compressor 102 and the inlet of the first path of the first heat exchanger 101. The other portion flows to the load flow path 109, releasing cooling capacity to the load flow path 109.

[0072] In some embodiments, when the first path of the second heat exchanger 107 is connected to the outlet of the second path of the first heat exchanger 101, the flow rate of the first path of the second heat exchanger 107 is less than half the flow rate of the second path of the first heat exchanger 101.

[0073] In other words, when the ambient temperature is higher than the target temperature, the refrigeration system 100 enters the second operating mode. A portion of the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 can flow to the first path of the second heat exchanger 107, and another portion of the low-temperature heat dissipation medium can flow to the load flow path 109. The flow rate of the heat dissipation medium flowing to the first path of the second heat exchanger 107 is less than half the flow rate of the heat dissipation medium flowing out of the second path of the first heat exchanger 101, while the flow rate of the heat dissipation medium flowing to the load flow path 109 is greater than half the flow rate of the heat dissipation medium flowing out of the second path of the first heat exchanger 101. That is, the flow rate of the heat dissipation medium flowing to the load flow path 109 is greater than the flow rate of the heat dissipation medium flowing to the first path of the second heat exchanger 107.

[0074] The above design ensures that the cooling medium used to dissipate heat from the load flow path 109 has sufficient cooling capacity, reducing the risk of overheating of the energy storage device. It also compensates for the insufficient condensing capacity of the condenser 103, thereby improving the energy efficiency of the refrigeration system 100 and reducing energy consumption costs.

[0075] In some embodiments, such as Figure 1 and Figure 2 As shown, the refrigeration cycle includes a dryer filter 104 and a throttling device 105.

[0076] The dryer filter 104 can be constructed by filling it with a desiccant and a precision metal filter screen, and encapsulating it in a pressure-resistant sealed housing. The dryer filter 104 can adsorb moisture in the refrigerant, reducing the risk of pipe icing, and can filter metal debris or other impurities, reducing the risk of pipe blockage.

[0077] The throttling device 105 can reduce the pressure of the high-pressure liquid refrigerant into a low-temperature, low-pressure gas-liquid mixture, creating conditions for the refrigerant to release its cooling capacity in the first path of the first heat exchanger 101. The throttling device 105 can be an expansion valve or a capillary tube, etc.

[0078] like Figure 1 and Figure 2 As shown, the compressor 102, condenser 103, dryer filter 104, throttling device 105 and first heat exchanger 101 are connected end to end in the first path.

[0079] In other words, the outlet of compressor 102 is connected to the inlet of condenser 103, the outlet of condenser 103 is connected to the inlet of dryer filter 104, the outlet of dryer filter 104 is connected to the inlet of throttling device 105, the outlet of throttling device 105 is connected to the inlet of the first path of first heat exchanger 101, and the outlet of the first path of first heat exchanger 101 is connected to the inlet of compressor 102.

[0080] In the refrigeration cycle, the compressor 102 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas. The high-temperature, high-pressure gaseous refrigerant can enter the condenser 103 to release heat and condense into a high-pressure liquid. The liquid refrigerant flows through the dryer filter 104 to filter out moisture and other impurities, and then passes through the throttling device 105 to reduce its pressure and become a low-temperature, low-pressure gas-liquid mixture. The gas-liquid mixture flows into the first path of the first heat exchanger 101 and absorbs the heat from the heat dissipation medium flowing through the second path of the first heat exchanger 101. The gas-liquid mixture evaporates into a gaseous state and flows into the compressor 102, thus completing the refrigeration cycle.

[0081] In some embodiments, such as Figure 1 and Figure 2 As shown, the drive pump 108, the second path of the first heat exchanger 101, and the load flow path 109 are connected in sequence.

[0082] In the heat dissipation cycle, the drive pump 108 pushes the heat dissipation medium to flow. The heat dissipation medium enters the second path of the first heat exchanger 101 and absorbs the cold energy of the cooling medium flowing through the first path of the first heat exchanger 101 and cools down. The low-temperature heat dissipation medium flows through the load flow path 109 and absorbs heat. The heat-absorbing and heated heat dissipation medium flows into the drive pump 108, thereby completing the heat dissipation cycle.

[0083] Of course, the position of the drive pump 108 in the heat dissipation cycle is not limited.

[0084] like Figure 1 and Figure 2 As shown, the heat dissipation cycle may include a heat dissipation medium storage tank 110.

[0085] The heat dissipation medium storage tank 110 is a container capable of storing heat dissipation medium. For example, when the heat dissipation medium is deionized water, the heat dissipation medium storage tank 110 can be a water tank.

[0086] The heat dissipation medium storage tank 110 provides space to accommodate volume changes in the heat dissipation medium caused by temperature variations, reducing the risk of excessively high or low pipeline pressure. Simultaneously, the heat dissipation medium storage tank 110 replenishes the heat dissipation circulation medium.

[0087] like Figure 1 and Figure 2 As shown, the heat dissipation medium storage tank 110 is connected to the inlet of the drive pump 108.

[0088] In this way, the heat dissipation medium storage tank 110 can replenish the heat dissipation medium in a timely manner, so that the inlet of the drive pump 108 has enough heat dissipation medium, reducing the risk of cavitation damage to the drive pump 108 due to cavitation.

[0089] Of course, the position of the heat dissipation medium storage box 110 in the heat dissipation cycle is not limited.

[0090] In this embodiment, the second path of the second heat exchanger 107 is used for heat exchange with the medium between the outlet of the compressor 102 and the inlet of the first path of the first heat exchanger 101.

[0091] The second path of the second heat exchanger 107 can be used for at least one of the following purposes: Firstly, the second path of the second heat exchanger 107 is used for heat exchange with the external cooling medium of the condenser 103.

[0092] In this embodiment, such as Figure 1 As shown, the condenser 103 can be either air-cooled or evaporative, and its external cooling medium can include air.

[0093] The second path of the second heat exchanger 107 can be used for heat exchange with the airflow path of the condenser 103.

[0094] The low-temperature heat dissipation medium flowing out from the second path of the first heat exchanger 101 can be diverted to the first path of the second heat exchanger 107. This portion of the low-temperature heat dissipation medium can transfer cooling energy to the medium in the second path of the second heat exchanger 107. The low-temperature medium in the second path of the second heat exchanger 107 transfers cooling energy to the air flow path of the condenser 103, causing the air temperature to decrease. The cooled air transfers cooling energy to the cooling medium in the condenser 103, causing the cooling medium to condense from a high-temperature, high-pressure gaseous state to a high-pressure liquid state. Figure 1 As shown, the process of transferring the cooling capacity of the air to the cooling medium in the condenser 103 can be achieved using a condenser fan 113. Of course, this process can also be achieved using natural convection or ambient airflow cooling.

[0095] In some embodiments, such as Figure 1 As shown, the second path of the second heat exchanger 107 is also an air flow path, and the second heat exchanger 107 is arranged on the upstream side of the air inlet direction of the condenser 103.

[0096] In this way, the low-temperature heat dissipation medium in the first path of the second heat exchanger 107 can transfer the cooling energy to the air in the second path of the second heat exchanger 107, thereby lowering the air temperature. The cooled air is located upstream of the air inlet direction of the condenser 103 and can be blown towards the condenser 103 by the condenser fan 113 or other air supply methods, so that the cooling medium in the condenser 103 absorbs the cooling energy of the cooled air and condenses it into a high-pressure liquid state.

[0097] Of course, the external cooling medium of condenser 103 can also be water or other media. The low-temperature heat dissipation medium can exchange heat with the external cooling medium of condenser 103 through the second heat exchanger 107.

[0098] The second path of the second heat exchanger 107 is used to exchange heat with the external cooling medium of the condenser 103. This can reduce the condensation temperature of the refrigerant flowing through the condenser 103, thereby reducing the condensation pressure, reducing the energy consumption of the compressor 102, increasing the subcooling of the refrigerant entering the first path of the first heat exchanger 101, and optimizing the energy efficiency of the refrigeration system 100. In addition, the cost of precooling the external cooling medium of the condenser 103 in this method is relatively low.

[0099] Secondly, the second path of the second heat exchanger 107 is used for heat exchange with the cooling medium.

[0100] In this embodiment, such as Figure 2 As shown, the second path of the second heat exchanger 107 is connected in parallel with the condenser 103 and can be selectively connected to the refrigeration cycle.

[0101] That is, the refrigerant flowing out of the compressor 102 outlet can flow entirely to the condenser 103. Alternatively, the refrigerant flowing out of the compressor 102 outlet can flow partly to the condenser 103 and partly to the second path of the second heat exchanger 107, and the two parts of the refrigerant flow together before flowing to the first path of the first heat exchanger 101.

[0102] In this way, the low-temperature heat dissipation medium flowing out from the second path of the first heat exchanger 101 can be diverted to the first path of the second heat exchanger 107. This part of the low-temperature heat dissipation medium can directly transfer the cold energy to the refrigeration medium of the second path of the second heat exchanger 107, so that this part of the refrigeration medium absorbs the cold energy and its temperature decreases.

[0103] The second path of the second heat exchanger 107, used for heat exchange with the cooling medium, can directly provide a portion of the cooling medium's cooling capacity while reducing the flow rate of the cooling medium to the condenser 103. This reduces the amount of cooling capacity absorbed by the cooling medium in the condenser 103 from the external environment, thereby reducing the energy consumption of the compressor 102, increasing the subcooling of the refrigerant entering the first heat exchanger 101, and optimizing the energy efficiency of the refrigeration system 100. Furthermore, this method allows for direct cooling of the cooling medium within the second heat exchanger 107, resulting in minimal cooling capacity transfer loss.

[0104] In some embodiments, such as Figure 2 As shown, the refrigeration cycle includes a second three-way valve 106.

[0105] The second three-way valve 106 has three valve ports, namely the first valve port, the second valve port and the third valve port.

[0106] like Figure 2 As shown, the first valve port of the second three-way valve 106 is connected to the outlet of the compressor 102, the second valve port of the second three-way valve 106 is connected to the inlet of the second path of the second heat exchanger 107, and the third valve port of the second three-way valve 106 is connected to the inlet of the condenser 103.

[0107] In other words, the first port of the second three-way valve 106 is the inlet of the second three-way valve 106, capable of receiving refrigerant from the compressor 102. The second port of the second three-way valve 106 is the outlet of the second three-way valve 106, which, when connected, guides the refrigerant to the second path of the second heat exchanger 107. The third port of the second three-way valve 106 is the outlet of the second three-way valve 106, capable of delivering the refrigerant to the inlet of the condenser 103.

[0108] The first port of the second three-way valve 106 is connected to the third port of the second three-way valve 106, and the first port of the first three-way valve 111 is selectively connected to the second port of the first three-way valve 111.

[0109] Thus, when the ambient temperature is less than or equal to the target temperature, the refrigeration system 100 enters the first operating mode. The refrigerant from the compressor 102 can flow entirely through the first port of the second three-way valve 106 to the third port of the second three-way valve 106, thereby flowing entirely into the condenser 103. When the ambient temperature is greater than the target temperature, the refrigeration system 100 enters the second operating mode. After the refrigerant from the compressor 102 passes through the first port of the second three-way valve 106, a portion of the refrigerant flows to the third port of the second three-way valve 106 and flows into the condenser 103, while the other portion flows to the second port of the second three-way valve 106 and flows into the second path of the second heat exchanger 107 to absorb the cooling capacity of the low-temperature heat dissipation medium flowing through the first path of the second heat exchanger 107. Subsequently, this portion of the refrigerant can merge with the refrigerant flowing through the condenser 103 between the outlet of the condenser 103 and the inlet of the first path of the first heat exchanger 101.

[0110] Of course, the refrigeration cycle can also include two independent valves, namely a third valve and a fourth valve. The third valve is located between the inlet of the second path of the second heat exchanger 107 and the outlet of the compressor 102, and the fourth valve is located between the inlet of the condenser 103 and the outlet of the compressor 102. The third valve can selectively connect the inlet of the second path of the second heat exchanger 107 to the outlet of the compressor 102, while the fourth valve always connects the inlet of the condenser 103 to the outlet of the compressor 102.

[0111] Several refrigeration systems 100 according to embodiments of this application are described below.

[0112] 1. The refrigeration system 100 includes a refrigeration cycle, a heating cycle, and a second heat exchanger 107.

[0113] The refrigeration cycle includes a compressor 102, a condenser 103, a dryer filter 104, a throttling device 105, and a first heat exchanger 101.

[0114] The heating cycle includes a drive pump 108, a second path of a first heat exchanger 101, a first three-way valve 111, a load flow path 109, and a heat dissipation medium storage tank 110.

[0115] The refrigeration system 100 provided in this embodiment works by coordinating a refrigeration cycle and a heat dissipation cycle. The working principle of the refrigeration system 100 is as follows: In the refrigeration cycle, compressor 102 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas, which then enters condenser 103. In the first operating mode, the refrigerant directly absorbs the cooling energy from the airflow path of condenser 103 and condenses into a high-pressure liquid. In the second operating mode, the refrigerant exchanges heat with the air that absorbs the cooling energy from the first path of the second heat exchanger 107 and condenses into a high-pressure liquid. After flowing through the dryer filter 104, the liquid refrigerant is depressurized by the throttling device 105, becoming a low-temperature, low-pressure gas-liquid mixture. This mixture flows into the first path of the first heat exchanger 101 and absorbs heat from the second path of the first heat exchanger 101. The gas-liquid mixture evaporates into a gas and flows into compressor 102, thus completing the refrigeration cycle.

[0116] In the heat dissipation cycle, the drive pump 108 propels the heat dissipation medium to flow. The heat dissipation medium enters the second path of the first heat exchanger 101 and absorbs the cold energy of the refrigerant flowing through the first path of the first heat exchanger 101, thus cooling down. The low-temperature heat dissipation medium flows through the load flow path 109 and absorbs heat. The heat-absorbing and heated heat dissipation medium flows into the drive pump 108 after the pressure is regulated by the heat dissipation medium storage tank 110, thereby completing the heat dissipation cycle. In the first working mode, the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 is not diverted. In the second working mode, a portion of the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 is diverted to the first path of the second heat exchanger 107 through the first three-way valve 111, transferring the cold energy to the air flowing through the second path of the second heat exchanger 107. This portion of the heat dissipation medium absorbs heat and becomes heated before flowing into the load flow path 109 or the inlet of the drive pump 108.

[0117] II. The refrigeration system 100 includes a refrigeration cycle, a heating cycle, and a second heat exchanger 107.

[0118] The refrigeration cycle includes a compressor 102, a second three-way valve 106, a condenser 103, a dryer filter 104, a throttling device 105, and a first heat exchanger 101.

[0119] The heating cycle includes a drive pump 108, a second path of a first heat exchanger 101, a first three-way valve 111, a load flow path 109, and a heat dissipation medium storage tank 110.

[0120] The refrigeration system 100 provided in this embodiment works by coordinating a refrigeration cycle and a heat dissipation cycle. The working principle of the refrigeration system 100 is as follows: In the refrigeration cycle, compressor 102 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas, which then enters condenser 103. In the first operating mode, the refrigerant directly absorbs the cooling energy from the airflow path of condenser 103 and condenses into a high-pressure liquid. In the second operating mode, a portion of the refrigerant is diverted through the second three-way valve 106 to the second path of the second heat exchanger 107 and absorbs the cooling energy from the first path of the second heat exchanger 107. The other portion of the refrigerant directly absorbs the cooling energy from the airflow path of condenser 103. The two portions of the refrigerant merge and are in a high-pressure liquid state. After passing through the dryer filter 104, the liquid refrigerant is depressurized by the throttling device 105 to become a low-temperature, low-pressure gas-liquid mixture. This mixture flows into the first path of the first heat exchanger 101 and absorbs the heat from the cooling energy flowing through the second path of the first heat exchanger 101. The gas-liquid mixture evaporates into a gas and flows into compressor 102, thus completing the refrigeration cycle.

[0121] In the heat dissipation cycle, the drive pump 108 propels the heat dissipation medium to flow. The heat dissipation medium enters the second path of the first heat exchanger 101 and absorbs the cold energy of the refrigerant flowing through the first path of the first heat exchanger 101, thus cooling down. The low-temperature heat dissipation medium flows through the load flow path 109 and absorbs heat. The heat-absorbing and heated heat dissipation medium flows into the drive pump 108 after the pressure is regulated by the heat dissipation medium storage tank 110, thereby completing the heat dissipation cycle. In the first working mode, the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 is not diverted. In the second working mode, a portion of the low-temperature heat dissipation medium flowing out of the second path of the first heat exchanger 101 is diverted to the first path of the second heat exchanger 107 through the first three-way valve 111, transferring the cold energy to the refrigerant flowing through the second path of the second heat exchanger 107. This portion of the heat dissipation medium absorbs heat and heats up before flowing into the load flow path 109 or the inlet of the drive pump 108.

[0122] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0123] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 should not be construed as a limitation of this application.

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

[0125] In the description of this application, "multiple" means two or more.

[0126] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0127] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0128] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A refrigeration system (100), characterized in that, include: The refrigeration cycle includes a first path of a compressor (102), a condenser (103), and a first heat exchanger (101); The heat dissipation cycle includes a drive pump (108), a second path of the first heat exchanger (101), and a load flow path (109). The second heat exchanger (107) has a first path that is selectively connected to the outlet of the second path of the first heat exchanger (101), and when connected, the second path of the second heat exchanger (107) is used for heat exchange with the medium between the outlet of the compressor (102) and the inlet of the first path of the first heat exchanger (101). The first path of the first heat exchanger (101) is used to cool the second path of the first heat exchanger (101).

2. The refrigeration system (100) according to claim 1, characterized in that, The inlet of the first path of the second heat exchanger (107) may be selectively connected to the outlet of the second path of the first heat exchanger (101), and the outlet of the first path of the second heat exchanger (107) is connected to the inlet of the load flow path (109). or, The inlet of the first path of the second heat exchanger (107) may be selectively connected to the outlet of the second path of the first heat exchanger (101), and the outlet of the first path of the second heat exchanger (107) is connected to the inlet of the drive pump (108).

3. The refrigeration system (100) according to claim 2, characterized in that, The heat dissipation cycle also includes: The first three-way valve (111) has its first port connected to the outlet of the second path of the first heat exchanger (101), its second port connected to the inlet of the first path of the second heat exchanger (107), and its third port connected to the inlet of the load flow path (109). The first valve port of the first three-way valve (111) is connected to the third valve port of the first three-way valve (111), and the first valve port of the first three-way valve (111) is selectively connected to the second valve port of the first three-way valve (111).

4. The refrigeration system (100) according to claim 1, characterized in that, The refrigeration system (100) has a first operating mode and a second operating mode; In the first operating mode, the first path of the second heat exchanger (107) is disconnected from the outlet of the second path of the first heat exchanger (101); In the second operating mode, the first path of the second heat exchanger (107) is connected to the outlet of the second path of the first heat exchanger (101); When the ambient temperature is determined to be higher than the target temperature, the refrigeration system (100) enters the second operating mode.

5. The refrigeration system (100) according to claim 1, characterized in that, When the outlet of the first path of the second heat exchanger (107) is connected to the outlet of the second path of the first heat exchanger (101), the flow rate of the first path of the second heat exchanger (107) is less than half of the flow rate of the second path of the first heat exchanger (101).

6. The refrigeration system (100) according to claim 1, characterized in that, The refrigeration cycle also includes a dryer filter (104) and a throttling device (105), and the compressor (102), the condenser (103), the dryer filter (104), the throttling device (105) and the first heat exchanger (101) are connected end to end in the first path; And / or, The heat dissipation cycle also includes a heat dissipation medium storage tank (110), the drive pump (108), the second path of the first heat exchanger (101) and the load flow path (109) are connected in sequence, and the heat dissipation medium storage tank (110) is connected to the inlet of the drive pump (108).

7. The refrigeration system (100) according to any one of claims 1-6, characterized in that, The second path of the second heat exchanger (107) is used for heat exchange with the air flow path of the condenser (103).

8. The refrigeration system (100) according to claim 7, characterized in that, The second path of the second heat exchanger (107) is also an air flow path, and the second heat exchanger (107) is arranged on the upstream side of the air inlet direction of the condenser (103).

9. The refrigeration system (100) according to any one of claims 1-6, characterized in that, The second path of the second heat exchanger (107) is connected in parallel with the condenser (103) and can be selectively connected to the refrigeration cycle.

10. The refrigeration system (100) according to claim 9, characterized in that, The refrigeration cycle also includes: The second three-way valve (106) has its first port connected to the outlet of the compressor (102), its second port connected to the inlet of the second path of the second heat exchanger (107), and its third port connected to the inlet of the condenser (103). The first valve port of the second three-way valve (106) is connected to the third valve port of the second three-way valve (106), and the first valve port of the second three-way valve (106) is selectively connected to the second valve port of the second three-way valve (106).

11. An energy storage system, characterized in that, include: The refrigeration system (100) as described in any one of claims 1-10; The energy storage device, wherein the load flow path (109) is used to dissipate heat from the energy storage device.

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