Refrigeration system, method, apparatus, refrigeration device, and storage medium

Abstract

Embodiments of the present application relate to a refrigeration system, method, device, refrigeration equipment and storage medium, the system comprises: a low-temperature stage refrigerant module, a high-temperature stage refrigerant module and a three-way electromagnetic valve; the first end of the three-way electromagnetic valve is connected with the outlet of the evaporator, the second end is connected with the first input end of the first regenerator, when the temperature of the refrigeration system is greater than a set threshold, the refrigerant at the outlet of the evaporator and the high-temperature stage refrigerant are exchanged through the first regenerator; the third end of the three-way electromagnetic valve is connected with the first input end of the second regenerator in the low-temperature stage refrigerant module, when the temperature is less than or equal to the set threshold, the refrigerant at the outlet of the evaporator and the low-temperature stage refrigerant are exchanged through the second regenerator. Thus, the exchange of heat between the low-temperature stage refrigerant and the high-temperature stage refrigerant, or the low-temperature stage refrigerant and the low-temperature stage refrigerant can be controlled, the compressor return gas is pre-cooled, the temperature and pressure of the compressor return gas are reduced, and thus the exhaust temperature and pressure of the compressor are reduced.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of compressor technology, and in particular to a refrigeration system, method, apparatus, refrigeration equipment and storage medium. Background Technology

[0002] With the development of science and technology and the improvement of living standards, cryogenic refrigeration technology is increasingly widely used in medical and health care, food storage, and other fields. Single-stage or two-stage vapor compression refrigeration systems struggle to achieve low-temperature storage environments and have low operating efficiency. Cascade refrigeration systems are significantly effective in achieving low temperatures, but when the equipment temperature is high, the compressor experiences excessively high discharge pressure during startup. This causes the compressor to trigger pressure protection due to excessively high condensing pressure, leading to startup failure or prolonged inability to start. To reduce the rapid increase in compressor discharge pressure during startup, traditionally, an expansion tank is installed at the return line of the cryogenic compressor to store a portion of the refrigerant. During the initial startup phase, only a small amount of refrigerant participates in the circulation. Once the equipment temperature decreases, the expansion tank's solenoid valve is opened, releasing the refrigerant back into the system to participate in the refrigeration cycle. However, installing an expansion tank is costly, and the control method for the expansion tank is complex and has low reliability.

[0003] Therefore, how to reduce the discharge pressure and temperature of the compressor in the refrigeration system has become an urgent problem to be solved. Summary of the Invention

[0004] In view of this, in order to solve the technical problem of excessively high compressor discharge pressure and temperature in the above-mentioned refrigeration system, the present invention provides a refrigeration system, method, apparatus, computer equipment and storage medium.

[0005] In a first aspect, embodiments of the present invention provide a refrigeration system, comprising: a low-temperature refrigerant module, a high-temperature refrigerant module, and a three-way solenoid valve;

[0006] The first end of the three-way solenoid valve is connected to the outlet of the evaporator in the low-temperature refrigerant module, and the second end is connected to the first input end of the first regenerator in the high-temperature refrigerant module. When the temperature of the refrigeration system is greater than the set threshold, the refrigerant at the outlet of the evaporator and the high-temperature refrigerant in the high-temperature refrigerant module are exchanged for heat through the first regenerator.

[0007] The third end of the three-way solenoid valve is connected to the first input end of the second regenerator in the low-temperature refrigerant module. When the temperature is less than or equal to a set threshold, the refrigerant at the evaporator outlet and the low-temperature refrigerant in the low-temperature refrigerant module are exchanged for heat through the second regenerator.

[0008] In one possible implementation, the high-temperature refrigerant module includes: a high-temperature compressor, a condenser, a first dryer filter, a first capillary tube, a first regenerator, and an evaporator-condenser;

[0009] The output end of the high-temperature compressor is connected to the input end of the condenser, and the input end is connected to the output end of the gas-liquid separator;

[0010] The condenser output is connected to the first input of the first regenerator via a first drying filter and a first capillary tube.

[0011] The first output terminal of the first regenerator is connected to the first input terminal of the evaporator-condenser.

[0012] The first output end of the evaporator-condenser is connected to the input end of the high-temperature compressor. When the temperature of the refrigeration system is greater than a set threshold, the refrigerant at the outlet of the evaporator exchanges heat with the high-temperature refrigerant through the first regenerator.

[0013] In one possible implementation, the high-temperature refrigerant module further includes: an anti-condensation pipe and a gas-liquid separator;

[0014] The anti-condensation pipe is connected to the output of the high-temperature compressor and to the input of the condenser. The anti-condensation pipe heats the door seal of the refrigeration system.

[0015] The gas-liquid separator input is connected to the first output of the evaporator-condenser, and the output is connected to the input of the high-temperature compressor, so as to store the liquid refrigerant at the evaporator outlet through the gas-liquid separator.

[0016] In one possible implementation, the low-temperature refrigerant module includes: a low-temperature compressor, an evaporator-condenser, a second dryer filter, a second capillary tube, an evaporator, and a second regenerator;

[0017] The output end of the second dryer filter is connected to the input end of the evaporator through the second capillary tube, and the input end is connected to the first output end of the second regenerator;

[0018] The evaporator output is connected to the second input of the first regenerator via the first and second ends of the three-way solenoid valve, and the second output of the first regenerator is connected to the input of the low-temperature compressor, so as to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a set threshold.

[0019] The evaporator output is connected to the second input of the second regenerator via the first and third ends of the three-way solenoid valve, and the second output of the second regenerator is connected to the input of the low-temperature compressor, so as to control the first and third ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is less than or equal to a set threshold.

[0020] The output end of the cryogenic compressor is connected to the second input end of the evaporator-condenser;

[0021] The second output end of the evaporator-condenser is connected to the first input end of the second regenerator to exchange heat between the high-temperature refrigerant and the low-temperature refrigerant through the evaporator-condenser.

[0022] In one possible implementation, the low-temperature refrigerant module further includes: an oil separator;

[0023] The oil separator is connected to the cryogenic compressor via an oil return line, so as to separate the refrigeration oil of the cryogenic compressor through the oil separator and return it to the cryogenic compressor through the oil return line.

[0024] Secondly, embodiments of the present invention provide a refrigeration method, comprising:

[0025] When the temperature of the refrigeration system exceeds the first threshold, the first and second ends of the three-way solenoid valve are opened. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. The low-temperature refrigerant module includes: an evaporator-condenser, a low-temperature compressor, an evaporator, and a second regenerator. The high-temperature refrigerant module includes: an evaporator-condenser, a high-temperature compressor, and a first regenerator.

[0026] After the high-temperature compressor starts running, the evaporator and condenser are controlled to condense the refrigerant in the exhaust pipe of the low-temperature compressor.

[0027] The first regenerator is controlled to pre-cool the refrigerant at the outlet of the evaporator;

[0028] After the high-temperature compressor has been running for a preset period of time, the low-temperature compressor is controlled to run.

[0029] When the temperature of the refrigeration system drops to the second threshold, the first and third ends of the three-way solenoid valve are opened to allow the second regenerator to pre-cool the refrigerant at the outlet of the evaporator-condenser.

[0030] In one possible implementation, the method further includes:

[0031] When the temperature of the refrigeration system is less than or equal to the first threshold, the first and third ends of the three-way solenoid valve are controlled to be open.

[0032] After the high-temperature compressor starts running, the evaporator and condenser are controlled to condense the refrigerant in the exhaust pipe of the low-temperature compressor.

[0033] The second regenerator is controlled to pre-cool the refrigerant at the outlet of the evaporator-condenser;

[0034] After the high-temperature compressor has been running for a preset time, the low-temperature compressor is controlled to run.

[0035] Thirdly, embodiments of the present invention provide a refrigeration device, comprising:

[0036] The first control module is used to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a first threshold. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. The low-temperature refrigerant module includes: an evaporator-condenser, a low-temperature compressor, an evaporator and a second regenerator. The high-temperature refrigerant module includes: an evaporator-condenser, a high-temperature compressor and a first regenerator.

[0037] The second control module is used to control the evaporator-condenser to condense the refrigerant in the exhaust pipe of the low-temperature compressor after the high-temperature compressor is running;

[0038] The third control module is used to control the first regenerator to pre-cool the refrigerant at the outlet of the evaporator;

[0039] The fourth control module is used to control the operation of the low-temperature compressor after the high-temperature compressor has been running for a preset time.

[0040] The first control module is also used to control the first and third ends of the three-way solenoid valve to be turned on when the temperature of the refrigeration system drops to the second threshold, so as to pre-cool the refrigerant at the outlet of the evaporator-condenser through the second regenerator.

[0041] Fourthly, embodiments of the present invention provide a refrigeration device, comprising: a processor and a memory, wherein the processor is configured to execute a refrigeration program stored in the memory to implement the refrigeration method described in any one of the second aspects above.

[0042] Fifthly, embodiments of the present invention provide a storage medium storing one or more programs, which can be executed by one or more processors to implement the cooling method described in any one of the second aspects above.

[0043] The refrigeration system provided in this embodiment of the invention includes: a low-temperature refrigerant module, a high-temperature refrigerant module, and a three-way solenoid valve. The first end of the three-way solenoid valve is connected to the outlet of the evaporator in the low-temperature refrigerant module, and the second end is connected to the first input end of the first regenerator in the high-temperature refrigerant module. When the temperature of the refrigeration system is greater than a set threshold, heat exchange occurs between the refrigerant at the evaporator outlet and the high-temperature refrigerant in the high-temperature refrigerant module through the first regenerator. The third end of the three-way solenoid valve is connected to the first input end of the second regenerator in the low-temperature refrigerant module. When the temperature is less than or equal to the set threshold, heat exchange occurs between the refrigerant at the evaporator outlet and the low-temperature refrigerant in the low-temperature refrigerant module through the second regenerator. Thus, a three-way solenoid valve can be installed at the evaporator outlet to control heat exchange between the low-temperature refrigerant and the high-temperature refrigerant, or between two low-temperature refrigerants, to pre-cool the compressor return gas, reduce the compressor return gas temperature and pressure, and thereby reduce the compressor discharge temperature and pressure. Attached Figure Description

[0044] Figure 1 A schematic diagram of a refrigeration system provided in an embodiment of the present invention;

[0045] Figure 2 A schematic flowchart of a refrigeration method provided in an embodiment of the present invention;

[0046] Figure 3 A schematic flowchart of another refrigeration method provided in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of a refrigeration device provided in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of a refrigeration device provided in an embodiment of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of the present invention.

[0051] Figure 1This is a schematic diagram of a refrigeration system provided in an embodiment of the present invention. Figure 1 As shown, the system specifically includes:

[0052] Low-temperature refrigerant module 11, high-temperature refrigerant module 12, and normally closed two-position three-way solenoid valve V;

[0053] The first end 1 of the three-way solenoid valve is connected to the outlet of the evaporator E in the low-temperature refrigerant module, and the second end 2 is connected to the first input end of the first regenerator H1 in the high-temperature refrigerant module. When the temperature of the refrigeration system is greater than the set threshold, the refrigerant at the outlet of the evaporator is exchanged with the high-temperature refrigerant in the high-temperature refrigerant module through the first regenerator.

[0054] The third terminal 3 of the three-way solenoid valve is connected to the first input terminal of the second regenerator H2 in the low-temperature refrigerant module. When the temperature is less than or equal to the set threshold, the refrigerant at the evaporator outlet and the low-temperature refrigerant in the low-temperature refrigerant module are exchanged for heat through the second regenerator.

[0055] In this embodiment, a cascade refrigeration system is applied. This system consists of a high-temperature refrigerant module, a low-temperature refrigerant module, and a three-way solenoid valve. The high-temperature refrigerant module's flow path sequentially includes a high-temperature compressor A1, an anti-condensation tube AC, a condenser C, a first dryer filter D1, a first capillary tube J1, a first regenerator H1, and a gas-liquid separator GL. The low-temperature refrigerant module's flow path sequentially includes a low-temperature compressor A2, an oil separator O, a second dryer filter D2, a second capillary tube J2, an evaporator E, a three-way solenoid valve V, and a second regenerator H2.

[0056] In one possible implementation, the output end of the high-temperature compressor is connected to the input end of the condenser, and the input end is connected to the output end of the gas-liquid separator; the output end of the condenser is connected to the first input end of the first regenerator through a first dryer filter and a first capillary tube, the dryer filter serves to absorb moisture, dry the refrigerant, and filter out fine impurities in the system; the first output end of the first regenerator is connected to the first input end of the evaporator-condenser; the first output end of the evaporator-condenser is connected to the input end of the high-temperature compressor, and when the temperature of the refrigeration system is greater than a set threshold, heat exchange occurs between the refrigerant at the evaporator outlet and the high-temperature refrigerant through the first regenerator.

[0057] The anti-condensation tube is encapsulated at the door seal. Its inlet is connected to the high-temperature compressor's outlet, and its outlet is connected to the condenser's inlet. This allows the anti-condensation tube to heat the refrigeration system's door seal, reducing frost formation. The gas-liquid separator's inlet is connected to the first outlet of the evaporator-condenser, and its outlet is connected to the high-temperature compressor's inlet. The gas-liquid separator stores the liquid refrigerant at the evaporator outlet, preventing liquid slugging caused by wet compression and thus avoiding reduced compressor lifespan.

[0058] In one possible implementation, the output end of the second dryer filter is connected to the input end of the evaporator via a second capillary tube, and the input end is connected to the first output end of the second regenerator; the output end of the evaporator is connected to the second input end of the first regenerator via the first and second ends of a three-way solenoid valve, and the second output end of the first regenerator is connected to the input end of the low-temperature compressor, so as to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a set threshold.

[0059] The evaporator output is connected to the second input of the second regenerator via the first and third ends of a three-way solenoid valve. The second output of the second regenerator is connected to the input of the low-temperature compressor. When the temperature of the refrigeration system is less than or equal to a set threshold, the first and third ends of the three-way solenoid valve are controlled to open. The low-temperature compressor output is connected to the second input of the evaporator-condenser.

[0060] The second output end of the evaporator-condenser is connected to the first input end of the second regenerator to exchange heat between the high-temperature refrigerant and the low-temperature refrigerant through the evaporator-condenser.

[0061] Among them, an oil return line 13 is provided between the cryogenic compressor and the oil separator, so that the refrigeration oil of the cryogenic compressor is separated by the oil separator and flows back to the cryogenic compressor through the oil return line.

[0062] Traditionally, to recover the cooling capacity of the low-temperature refrigerant at the evaporator outlet in a cascade refrigeration system, a regenerator is often installed at both the evaporator and evaporator-condenser outlets to pre-cool the low-temperature refrigerant flowing out of the evaporator-condenser, increasing subcooling, cooling capacity, and improving refrigeration efficiency. However, during the start-up phase at higher equipment temperatures, due to the counter-current refrigerant distribution within the regenerator, the compressor return gas temperature only decreases slightly after reheating, while the low-temperature liquid refrigerant at the evaporator-condenser outlet partially re-vaporizes, hindering the reduction of compressor discharge pressure. Therefore, when starting the refrigeration equipment from a higher ambient temperature, it is considered that heat exchange between the refrigerant at the evaporator outlet and the low-temperature refrigerant at the evaporator-condenser outlet should be prohibited. Instead, heat exchange should be allowed between the refrigerant at the evaporator-condenser inlet and the high-temperature refrigerant. This reduces the temperature and pressure of the refrigerant at the compressor inlet, thereby lowering the compressor discharge pressure and temperature.

[0063] In this embodiment, before the low-temperature refrigerant module starts operating, the high-temperature refrigerant module starts operating for a period of time first. This is to pre-cool the low-temperature refrigerant module, preventing the compressor discharge pressure from becoming too high after the low-temperature refrigerant module starts. Specifically, when the refrigeration system is powered on, it begins temperature-controlled cooling. If the current equipment temperature exceeds a set threshold, it indicates a high load, and the compressor discharge pressure may be too high, causing the compressor pressure protection to trip. Before the compressor starts temperature-controlled cooling, when the equipment temperature Tx of the refrigeration system is detected to be higher than the set threshold T1 (preferably, T1 = 20°C), the three-way solenoid valve V is energized, connecting pipes 1 and 2. The high-temperature refrigerant module starts operating for a period of time, condensing the refrigerant in the low-temperature compressor discharge pipe through the evaporator-condenser and pre-cooling the refrigerant at the evaporator outlet through the first regenerator. After the high-temperature compressor has reached the preset operating time (e.g., 10–13 minutes), the low-temperature compressor starts operating. When the equipment temperature drops to the set threshold T2 (preferably T2 = 10℃), the three-way solenoid valve is de-energized, disconnecting pipes 1 and 2 and connecting pipes 1 and 3. At this time, the refrigerant at the evaporator outlet pre-cools the low-temperature refrigerant flowing out of the evaporator condenser, increasing the subcooling and improving the refrigeration efficiency.

[0064] If the equipment temperature is below the set threshold, it indicates a low load, and the compressor discharge pressure will not be too high. Therefore, before the compressor starts to reach its operating temperature, when the equipment temperature Tx of the refrigeration system is detected to be less than or equal to the set threshold T1, the three-way solenoid valve remains de-energized, and pipes 1 and 3 are connected. The high-temperature refrigerant module starts running for a period of time first, condensing the refrigerant in the low-temperature compressor discharge pipe through the evaporator-condenser, and pre-cooling the refrigerant at the evaporator-condenser outlet through the second regenerator. After the high-temperature compressor has met the preset operating time, the low-temperature compressor starts running until the compressor shutdown conditions are met.

[0065] The refrigeration system provided in this embodiment of the invention includes: a low-temperature refrigerant module, a high-temperature refrigerant module, and a three-way solenoid valve. The first end of the three-way solenoid valve is connected to the outlet of the evaporator in the low-temperature refrigerant module, and the second end is connected to the first input end of the first regenerator in the high-temperature refrigerant module. When the temperature of the refrigeration system is greater than a set threshold, heat exchange occurs between the refrigerant at the evaporator outlet and the high-temperature refrigerant in the high-temperature refrigerant module through the first regenerator. The third end of the three-way solenoid valve is connected to the first input end of the second regenerator in the low-temperature refrigerant module. When the temperature is less than or equal to the set threshold, heat exchange occurs between the refrigerant at the evaporator outlet and the low-temperature refrigerant in the low-temperature refrigerant module through the second regenerator. Thus, a three-way solenoid valve is installed at the evaporator outlet to control heat exchange between the low-temperature refrigerant and the high-temperature refrigerant, or between two low-temperature refrigerants, to pre-cool the compressor return gas, reducing the compressor return gas temperature and pressure, thereby reducing the compressor discharge temperature and pressure.

[0066] Figure 2 This is a schematic flowchart of a refrigeration method provided in an embodiment of the present invention. Figure 2 As shown, the method specifically includes:

[0067] S21. When the temperature of the refrigeration system is greater than the first threshold, the first and second ends of the three-way solenoid valve are controlled to be open; the three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system.

[0068] S22. After controlling the operation of the high-temperature compressor, control the evaporator and condenser to condense the refrigerant in the exhaust pipe of the low-temperature compressor;

[0069] S23. Control the first regenerator to pre-cool the refrigerant at the outlet of the evaporator;

[0070] S24. After controlling the high-temperature compressor to run for a preset time, control the low-temperature compressor to run;

[0071] S25. When the temperature of the refrigeration system drops to the second threshold, the first and third ends of the three-way solenoid valve are controlled to open, so as to pre-cool the refrigerant at the outlet of the evaporator-condenser through the second regenerator.

[0072] The refrigeration method provided in this invention is applied to a cascade refrigeration system. The cascade refrigeration system consists of a high-temperature refrigerant module and a low-temperature refrigerant module. The high-temperature refrigerant module has, in sequence, a high-temperature compressor, an anti-condensation tube, a condenser, a first dryer filter, a first capillary tube, a first regenerator, and a gas-liquid separator. The low-temperature refrigerant module has, in sequence, a low-temperature compressor, an oil separator, a second dryer filter, a second capillary tube, an evaporator, a solenoid valve, and a second regenerator. An oil return line is provided between the low-temperature compressor and the oil separator, and heat exchange between the high-temperature and low-temperature refrigerant modules occurs through an evaporator-condenser system.

[0073] In this embodiment, the refrigeration system is powered on and begins temperature rise. When the internal temperature of the equipment is high, the three-way solenoid valve is energized to pre-cool the refrigerant at the evaporator outlet. After the high-temperature compressor has been running for a period of time, the low-temperature compressor starts. When the internal temperature of the equipment is low, the three-way solenoid valve is de-energized, and the refrigerant at the evaporator outlet exchanges heat with the refrigerant flowing from the evaporator-condenser. After the high-temperature compressor has been running for a period of time, the low-temperature compressor starts. Once the temperature of the refrigeration system has decreased, the solenoid valve remains de-energized, while the high- and low-temperature compressors continue to rise in temperature according to their original operating conditions until the compressor shutdown conditions are met.

[0074] Specifically, the first end of the three-way solenoid valve is connected to the evaporator output, and the second end is connected to the first regenerator input. When the temperature of the refrigeration system is detected to be higher than a first threshold (e.g., 20°C), the three-way solenoid valve is energized, and the first and second ends of the valve are connected. After the high-temperature compressor starts and runs for a period of time, the refrigerant in the low-temperature compressor exhaust pipe is condensed through the evaporator-condenser, and the refrigerant at the evaporator outlet is pre-cooled through the first regenerator. After the high-temperature compressor has run for the preset time, the low-temperature compressor starts. Until the refrigeration system temperature drops to the second threshold (e.g., 10°C), the three-way solenoid valve is de-energized, the first and second ends of the valve are disconnected, and the first and third ends are connected. At this time, the refrigerant at the evaporator outlet pre-cools the low-temperature refrigerant flowing out of the evaporator-condenser, increasing the subcooling and improving the refrigeration efficiency.

[0075] In one possible implementation, when the refrigeration system temperature is less than or equal to a first threshold, the first and third ends of the three-way solenoid valve are opened; after the high-temperature compressor has been running for a period of time, the evaporator and condenser are controlled to condense the refrigerant in the exhaust pipe of the low-temperature compressor; the second regenerator is controlled to pre-cool the refrigerant at the outlet of the evaporator and condenser; after the high-temperature compressor has been running for a preset time, the low-temperature compressor is controlled to start running until the compressor shutdown conditions are met.

[0076] As an example, such as Figure 3 The diagram shows a flow chart of another refrigeration method provided by an embodiment of the present invention. The refrigeration system is powered on and performs temperature-pull refrigeration to obtain the refrigeration system temperature. When the refrigeration system temperature is greater than a first threshold, the three-way solenoid valve is energized, and pipes 1 and 2 are connected. When the refrigeration system temperature is less than or equal to the first threshold, the three-way solenoid valve is de-energized, and pipes 1 and 3 are connected. After the high-temperature compressor runs for a period of time, the low-temperature compressor is turned on. When the refrigeration system temperature is lower than a second threshold, the three-way solenoid valve remains de-energized, and the refrigeration system continues to perform temperature-pull refrigeration until the compressor shutdown conditions are met.

[0077] The refrigeration method provided in this invention involves controlling the first and second ends of a three-way solenoid valve to conduct when the refrigeration system temperature exceeds a first threshold; controlling the evaporator-condenser to condense the refrigerant in the low-temperature compressor's exhaust pipe after the high-temperature compressor starts operating; controlling the first regenerator to pre-cool the refrigerant at the evaporator outlet; controlling the low-temperature compressor to operate after a preset time since the high-temperature compressor started operating; and controlling the first and third ends of the three-way solenoid valve to conduct when the refrigeration system temperature drops to a second threshold, thereby pre-cooling the refrigerant at the evaporator-condenser outlet through the second regenerator. This increases subcooling, improves refrigeration efficiency, and reduces compressor exhaust pressure and temperature by pre-cooling the compressor return gas, ensuring reliable start-up of the refrigeration system. Replacing the expansion tank with a regenerator reduces costs.

[0078] Figure 4 This is a schematic diagram of the structure of a refrigeration device provided in an embodiment of the present invention. Figure 4 As shown, the device specifically includes:

[0079] The first control module 41 is used to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than the first threshold. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. The low-temperature refrigerant module includes: an evaporator-condenser, a low-temperature compressor, an evaporator and a second regenerator. The high-temperature refrigerant module includes: an evaporator-condenser, a high-temperature compressor and a first regenerator.

[0080] The second control module 42 is used to control the evaporator-condenser to condense the refrigerant in the exhaust pipe of the low-temperature compressor after the high-temperature compressor is running;

[0081] The third control module 43 is used to control the first regenerator to pre-cool the refrigerant at the outlet of the evaporator;

[0082] The fourth control module 44 is used to control the operation of the low-temperature compressor after the high-temperature compressor has been running for a preset time.

[0083] The first control module is further configured to control the first and third ends of the three-way solenoid valve to be turned on when the temperature of the refrigeration system drops to the second threshold, so as to pre-cool the refrigerant at the outlet of the evaporator-condenser through the second regenerator.

[0084] In one possible implementation, the first control module is further configured to control the first and third ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is less than or equal to a first threshold.

[0085] The second control module is also used to control the evaporator-condenser to condense the refrigerant in the exhaust pipe of the low-temperature compressor after the high-temperature compressor is running;

[0086] The third control module is also used to control the second regenerator to pre-cool the refrigerant at the outlet of the evaporator-condenser;

[0087] The fourth control module is also used to control the operation of the low-temperature compressor after the high-temperature compressor has been running for a preset time.

[0088] The refrigeration device provided in this embodiment can be as follows: Figure 4 The apparatus shown can perform, for example Figure 2-3 All steps of the refrigeration method, thereby achieving Figure 2-3 For details on the technical effects of the refrigeration method shown, please refer to [link / reference]. Figure 2-3The relevant descriptions are presented concisely and will not be elaborated upon here.

[0089] Figure 5 This is a schematic diagram of the structure of a refrigeration device provided in an embodiment of the present invention. Figure 5 The illustrated cooling device 500 includes at least one processor 501, a memory 502, at least one network interface 504, and other user interfaces 503. The various components in the cooling device 500 are coupled together via a bus system 505. It is understood that the bus system 505 is used to implement communication between these components. In addition to a data bus, the bus system 505 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in… Figure 5 The general designated all buses as Bus System 505.

[0090] The user interface 503 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0091] It is understood that the memory 502 in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 502 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0092] In some implementations, memory 502 stores elements, executable units or data structures, or subsets thereof, or extended sets thereof: operating system 5021 and application program 5022.

[0093] The operating system 5021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 5022 includes various applications, such as a media player and a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 5022.

[0094] In this embodiment of the invention, by calling the program or instructions stored in memory 502, specifically the program or instructions stored in application program 5022, processor 501 executes the method steps provided in each method embodiment, including, for example:

[0095] When the temperature of the refrigeration equipment exceeds the first threshold, the first and second ends of the three-way solenoid valve are opened. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. The low-temperature refrigerant module includes: an evaporator-condenser, a low-temperature compressor, an evaporator, and a second regenerator. The high-temperature refrigerant module includes: an evaporator-condenser, a high-temperature compressor, and a first regenerator.

[0096] After the high-temperature compressor starts running, the evaporator and condenser are controlled to condense the refrigerant in the exhaust pipe of the low-temperature compressor.

[0097] The first regenerator is controlled to pre-cool the refrigerant at the outlet of the evaporator;

[0098] After the high-temperature compressor has been running for a preset period of time, the low-temperature compressor is controlled to run.

[0099] When the temperature of the refrigeration system drops to the second threshold, the first and third ends of the three-way solenoid valve are opened to allow the second regenerator to pre-cool the refrigerant at the outlet of the evaporator-condenser.

[0100] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 501. Processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 501 or by instructions in the form of software. The processor 501 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software units in the decoding processor. The software units may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 502. Processor 501 reads the information in memory 502 and, in conjunction with its hardware, completes the steps of the above method.

[0101] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or combinations thereof.

[0102] For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0103] The refrigeration equipment provided in this embodiment can be as follows: Figure 5 The refrigeration equipment shown can perform the following functions: Figure 2-3 All steps of the refrigeration method, thereby achieving Figure 2-3 For details on the technical effects of the refrigeration method shown, please refer to [link / reference]. Figure 2-3 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0104] This invention also provides a storage medium (computer-readable storage medium). This storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; the memory may also include combinations of the above types of memory.

[0105] When one or more programs in the storage medium can be executed by one or more processors to implement the cooling method described above that is executed on the device side.

[0106] The processor is used to execute a cooling program stored in memory to implement the following steps of a cooling method performed on the device side:

[0107] When the temperature of the refrigeration equipment exceeds the first threshold, the first and second ends of the three-way solenoid valve are opened. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. The low-temperature refrigerant module includes: an evaporator-condenser, a low-temperature compressor, an evaporator, and a second regenerator. The high-temperature refrigerant module includes: an evaporator-condenser, a high-temperature compressor, and a first regenerator.

[0108] After the high-temperature compressor starts running, the evaporator and condenser are controlled to condense the refrigerant in the exhaust pipe of the low-temperature compressor.

[0109] The first regenerator is controlled to pre-cool the refrigerant at the outlet of the evaporator;

[0110] After the high-temperature compressor has been running for a preset period of time, the low-temperature compressor is controlled to run.

[0111] When the temperature of the refrigeration system drops to the second threshold, the first and third ends of the three-way solenoid valve are opened to allow the second regenerator to pre-cool the refrigerant at the outlet of the evaporator-condenser.

[0112] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0113] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0114] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A refrigeration system, characterized in that, include: Low-temperature refrigerant module, high-temperature refrigerant module, and three-way solenoid valve; The first end of the three-way solenoid valve is connected to the outlet of the evaporator in the low-temperature refrigerant module, and the second end is connected to the first input end of the first regenerator in the high-temperature refrigerant module. When the temperature of the refrigeration system is greater than a set threshold, the refrigerant at the outlet of the evaporator and the high-temperature refrigerant in the high-temperature refrigerant module are exchanged for heat through the first regenerator. The third end of the three-way solenoid valve is connected to the first input end of the second regenerator in the low-temperature refrigerant module. When the temperature is less than or equal to a set threshold, the refrigerant at the outlet of the evaporator exchanges heat with the low-temperature refrigerant in the low-temperature refrigerant module through the second regenerator. The high-temperature refrigerant module includes: a high-temperature compressor, a condenser, a first dryer filter, a first capillary tube, a first regenerator, and an evaporator-condenser; The output end of the high-temperature compressor is connected to the input end of the condenser, and the input end is connected to the output end of the gas-liquid separator. The condenser output is connected to the first input of the first regenerator via a first drying filter and a first capillary tube. The first output terminal of the first regenerator is connected to the first input terminal of the evaporator-condenser. The first output end of the evaporator condenser is connected to the input end of the high-temperature compressor. When the temperature of the refrigeration system is greater than a set threshold, the refrigerant at the outlet of the evaporator exchanges heat with the high-temperature refrigerant through the first regenerator. The low-temperature refrigerant module includes: a low-temperature compressor, an evaporator-condenser, a second dryer filter, a second capillary tube, an evaporator, and a second regenerator; The output end of the second dryer filter is connected to the input end of the evaporator through the second capillary tube, and the input end is connected to the first output end of the second regenerator; The evaporator output is connected to the second input of the first regenerator via the first and second ends of the three-way solenoid valve, and the second output of the first regenerator is connected to the input of the low-temperature compressor, so as to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a set threshold. The evaporator output is connected to the second input of the second regenerator via the first and third ends of the three-way solenoid valve, and the second output of the second regenerator is connected to the input of the low-temperature compressor, so as to control the first and third ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is less than or equal to a set threshold. The output end of the cryogenic compressor is connected to the second input end of the evaporator-condenser; The second output end of the evaporator-condenser is connected to the first input end of the second regenerator to exchange heat between the high-temperature refrigerant and the low-temperature refrigerant through the evaporator-condenser.

2. The system according to claim 1, characterized in that, The high-temperature refrigerant module also includes: an anti-condensation pipe and a gas-liquid separator; The anti-condensation pipe is connected to the output of the high-temperature compressor and to the input of the condenser. The anti-condensation pipe heats the door seal of the refrigeration system. The gas-liquid separator input is connected to the first output of the evaporator-condenser, and the output is connected to the input of the high-temperature compressor, so as to store the liquid refrigerant at the evaporator outlet through the gas-liquid separator.

3. The system according to claim 1, characterized in that, The low-temperature refrigerant module also includes: an oil separator; The oil separator is connected to the cryogenic compressor via an oil return line, so as to separate the refrigeration oil of the cryogenic compressor through the oil separator and return it to the cryogenic compressor through the oil return line.

4. A refrigeration method, applied to the refrigeration system according to any one of claims 1-3, characterized in that, include: When the temperature of the refrigeration system exceeds the first threshold, the first and second ends of the three-way solenoid valve are opened. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. After the high-temperature compressor starts running, the evaporator and condenser are controlled to condense the refrigerant in the low-temperature compressor's exhaust pipe. Control the first regenerator to pre-cool the refrigerant at the evaporator outlet; After the high-temperature compressor has been running for a preset period of time, the low-temperature compressor is controlled to run. When the temperature of the refrigeration system drops to the second threshold, the first and third ends of the three-way solenoid valve are opened to allow the second regenerator to pre-cool the refrigerant at the outlet of the evaporator-condenser. The high-temperature refrigerant module includes: a high-temperature compressor, a condenser, a first dryer filter, a first capillary tube, a first regenerator, and an evaporator-condenser; The output end of the high-temperature compressor is connected to the input end of the condenser, and the input end is connected to the output end of the gas-liquid separator. The condenser output is connected to the first input of the first regenerator via a first drying filter and a first capillary tube. The first output terminal of the first regenerator is connected to the first input terminal of the evaporator-condenser. The first output end of the evaporator condenser is connected to the input end of the high-temperature compressor. When the temperature of the refrigeration system is greater than a set threshold, the refrigerant at the outlet of the evaporator exchanges heat with the high-temperature refrigerant through the first regenerator. The low-temperature refrigerant module includes: a low-temperature compressor, an evaporator-condenser, a second dryer filter, a second capillary tube, an evaporator, and a second regenerator; The output end of the second dryer filter is connected to the input end of the evaporator through the second capillary tube, and the input end is connected to the first output end of the second regenerator; The evaporator output is connected to the second input of the first regenerator via the first and second ends of the three-way solenoid valve, and the second output of the first regenerator is connected to the input of the low-temperature compressor, so as to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a set threshold. The evaporator output is connected to the second input of the second regenerator via the first and third ends of the three-way solenoid valve, and the second output of the second regenerator is connected to the input of the low-temperature compressor, so as to control the first and third ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is less than or equal to a set threshold. The output end of the cryogenic compressor is connected to the second input end of the evaporator-condenser; The second output end of the evaporator-condenser is connected to the first input end of the second regenerator to exchange heat between the high-temperature refrigerant and the low-temperature refrigerant through the evaporator-condenser.

5. The method according to claim 4, characterized in that, The method further includes: When the temperature of the refrigeration system is less than or equal to the first threshold, the first and third ends of the three-way solenoid valve are controlled to be open. After the high-temperature compressor starts running, the evaporator and condenser are controlled to condense the refrigerant in the exhaust pipe of the low-temperature compressor. The second regenerator is controlled to pre-cool the refrigerant at the outlet of the evaporator-condenser; After the high-temperature compressor has been running for a preset time, the low-temperature compressor is controlled to run.

6. A refrigeration device, characterized in that, include: The first control module is used to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a first threshold. The three-way solenoid valve is used to connect the low-temperature refrigerant module and the high-temperature refrigerant module of the refrigeration system. The low-temperature refrigerant module includes: an evaporator-condenser, a low-temperature compressor, an evaporator and a second regenerator. The high-temperature refrigerant module includes: an evaporator-condenser, a high-temperature compressor and a first regenerator. The second control module is used to control the evaporator-condenser to condense the refrigerant in the exhaust pipe of the low-temperature compressor after the high-temperature compressor is running; The third control module is used to control the first regenerator to pre-cool the refrigerant at the outlet of the evaporator; The fourth control module is used to control the operation of the low-temperature compressor after the high-temperature compressor has been running for a preset time. The first control module is also used to control the first and third ends of the three-way solenoid valve to be turned on when the temperature of the refrigeration system drops to the second threshold, so as to pre-cool the refrigerant at the outlet of the evaporator-condenser through the second regenerator; The high-temperature refrigerant module includes: a high-temperature compressor, a condenser, a first dryer filter, a first capillary tube, a first regenerator, and an evaporator-condenser; The output end of the high-temperature compressor is connected to the input end of the condenser, and the input end is connected to the output end of the gas-liquid separator. The condenser output is connected to the first input of the first regenerator via a first drying filter and a first capillary tube. The first output terminal of the first regenerator is connected to the first input terminal of the evaporator-condenser. The first output end of the evaporator condenser is connected to the input end of the high-temperature compressor. When the temperature of the refrigeration system is greater than a set threshold, the refrigerant at the outlet of the evaporator exchanges heat with the high-temperature refrigerant through the first regenerator. The low-temperature refrigerant module includes: a low-temperature compressor, an evaporator-condenser, a second dryer filter, a second capillary tube, an evaporator, and a second regenerator; The output end of the second dryer filter is connected to the input end of the evaporator through the second capillary tube, and the input end is connected to the first output end of the second regenerator; The evaporator output is connected to the second input of the first regenerator via the first and second ends of the three-way solenoid valve, and the second output of the first regenerator is connected to the input of the low-temperature compressor, so as to control the first and second ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is greater than a set threshold. The evaporator output is connected to the second input of the second regenerator via the first and third ends of the three-way solenoid valve, and the second output of the second regenerator is connected to the input of the low-temperature compressor, so as to control the first and third ends of the three-way solenoid valve to be open when the temperature of the refrigeration system is less than or equal to a set threshold. The output end of the cryogenic compressor is connected to the second input end of the evaporator-condenser; The second output end of the evaporator-condenser is connected to the first input end of the second regenerator to exchange heat between the high-temperature refrigerant and the low-temperature refrigerant through the evaporator-condenser.

7. A refrigeration device, characterized in that, include: A processor and a memory, the processor being configured to execute a cooling program stored in the memory to implement the cooling method according to any one of claims 4 to 5.

8. A storage medium, characterized in that, The storage medium stores one or more programs, which can be executed by one or more processors to implement the cooling method according to any one of claims 4 to 5.

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