A refrigeration system

Abstract

This invention discloses a refrigeration system, including a compressor, a condenser, a switching assembly, and an evaporator connected in series on a main refrigeration circuit. The compressor's exhaust port is connected to the condenser's inlet, and the condenser liquefies the first refrigerant gas discharged from the compressor into a refrigerant liquid. The evaporator's inlet is connected to the condenser's outlet, and the evaporator evaporates the refrigerant liquid into a second refrigerant gas. The compressor's inlet is connected to the evaporator's outlet, and the evaporator discharges the second refrigerant gas into the compressor. The switching assembly includes a first solenoid valve and an electronic expansion valve connected in series on the main refrigeration circuit between the condenser's outlet and the evaporator's inlet. The first solenoid valve controls the flow and shut-off of the refrigerant liquid, and the electronic expansion valve controls the refrigerant flow rate. The switching assembly enables precise control of the refrigerant entering the evaporator and precise temperature control, optimizing the refrigeration system's performance.

Description

[0001] This application is a divisional application of patent application number 202210132330.0 (the original application was filed on February 14, 2022, and the invention was entitled "A Refrigeration System"). Technical Field

[0002] This invention relates to the field of refrigeration technology, and in particular to a refrigeration system. Background Technology

[0003] Lithium batteries need to undergo charge-discharge tests under various temperature conditions and changes, including high temperature, low temperature, and temperature cycling, to ensure their performance under different conditions. Existing battery box cooling systems maintain internal temperature balance through the exchange of hot and cold air within the box, offering a simple structure and relatively high safety.

[0004] The cooling system is the most important system in the tunnel air supply battery box. The cooling system can directly cool the test area. However, traditional test systems have problems such as high energy consumption at low temperatures, which leads to unstable operation of the test system and waste of energy. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a refrigeration system that, by adding a switching component to the main refrigeration circuit, enables precise control of the flow rate of the refrigerant liquid flowing into the evaporator and allows for more precise temperature control, thereby optimizing the working effect of the refrigeration system.

[0006] An embodiment of the present invention provides a refrigeration system, including a compressor, a condenser, a switching assembly and an evaporator arranged in series on a main refrigeration circuit;

[0007] The compressor's exhaust port is connected to the condenser's inlet, and the condenser is used to liquefy the first refrigerant gas discharged from the compressor into a refrigerant.

[0008] The inlet of the evaporator is connected to the outlet of the condenser, and the evaporator is used to evaporate the refrigerant into a second refrigerant gas; wherein the pressure of the first refrigerant gas is higher than the pressure of the second refrigerant gas, and the temperature of the first refrigerant gas is higher than the temperature of the second refrigerant gas.

[0009] The compressor's inlet is connected to the evaporator's outlet, and the evaporator is used to discharge the second refrigerant gas into the compressor;

[0010] The switching assembly includes a first solenoid valve and an electronic expansion valve connected in series. The first solenoid valve and the electronic expansion valve are sequentially connected in series on the main refrigeration line between the outlet of the condenser and the inlet of the evaporator. The first solenoid valve is used to control the flow and cut-off of the refrigerant, and the electronic expansion valve is used to control the flow rate of the refrigerant.

[0011] The evaporator has a horizontal air outlet direction. A return air regulating grille is added in front of the evaporator inlet, and a rectifying stainless steel wire mesh is added after the evaporator outlet to balance the temperature distribution at the evaporator inlet and outlet.

[0012] The refrigeration system also includes a double-layer distributor, which is connected in series on the main refrigeration line between the electronic expansion valve and the inlet of the evaporator; the double-layer distributor is used to reduce the temperature difference along the height of the evaporator.

[0013] The double-layer distributor includes a first capillary tube and a second capillary tube. The inlet of the evaporator includes a first access point and a second access point. Along the height direction of the evaporator, the first access point is located above the second access point. The first capillary tube is connected to the first access point, and the second capillary tube is connected to the second access point. The first capillary tube and the second capillary tube are used to control the flow of the refrigerant into the evaporator.

[0014] Optionally, the switching assembly further includes a first ball valve and a second ball valve;

[0015] The first ball valve is located on the first capillary tube and is used to control the flow rate of the refrigerant flowing into the evaporator through the first capillary tube;

[0016] The second ball valve is located on the second capillary tube and is used to control the flow rate of the refrigerant flowing into the evaporator through the second capillary tube.

[0017] Optionally, the switching assembly further includes an evaporation pressure regulating valve;

[0018] The evaporation pressure regulating valve is located on the main refrigeration line between the outlet of the evaporator and the inlet of the compressor, and is used to regulate the outlet gas pressure of the evaporator.

[0019] Optionally, the refrigeration system further includes a first cold bypass circuit;

[0020] The switching assembly also includes a liquid injection valve and a first cold expansion valve;

[0021] The compressor, the condenser, the liquid injection valve, and the first cold expansion valve are connected in series in the first cold bypass circuit; the liquid injection valve is used to transmit the refrigerant to the air inlet of the compressor, and the first cold expansion valve is used to control the flow rate of the refrigerant entering the compressor.

[0022] Optionally, the refrigeration system further includes a second cold bypass circuit;

[0023] The switching assembly also includes a second solenoid valve and a thermal expansion valve;

[0024] The compressor, the condenser, the second solenoid valve, and the thermostatic expansion valve are connected in series in the second cold bypass circuit; the second solenoid valve is used to control the transfer of excess refrigerant to the compressor inlet, and the thermostatic expansion valve is used to control the flow rate of the refrigerant entering the compressor.

[0025] Optionally, the refrigeration system further includes a first thermal bypass circuit;

[0026] The switching assembly also includes a first hot gas bypass solenoid valve and an energy regulating valve.

[0027] The compressor, the first hot gas bypass solenoid valve, and the energy regulating valve are connected in series in the first hot bypass circuit; the first hot gas bypass solenoid valve is used to control the transmission of a portion of the first refrigerant gas to the inlet of the compressor, and the energy regulating valve is used to control the flow rate of the first refrigerant gas entering the compressor.

[0028] Optionally, the refrigeration system further includes a second heat bypass circuit;

[0029] The switching assembly also includes a first hot gas bypass solenoid valve and a third ball valve;

[0030] The compressor, the second hot gas bypass solenoid valve, the third ball valve, and the evaporator are connected in series in the second hot bypass circuit; the second hot gas bypass solenoid valve is used to control the transmission of a portion of the first refrigerant gas to the inlet of the evaporator, and the third ball valve is used to control the flow rate of the first refrigerant gas entering the evaporator.

[0031] Optionally, the main cooling circuit may further include a temperature detection module and a pressure detection module;

[0032] The temperature detection module includes a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor;

[0033] The first temperature sensor is used to detect the temperature of the compressor's exhaust port, the second temperature sensor is used to detect the temperature of the evaporator's outlet, the third temperature sensor is used to detect the temperature of the compressor's inlet, and the fourth temperature sensor is used to detect the temperature of the condenser.

[0034] The pressure detection module includes a first pressure sensor and a second pressure sensor;

[0035] The first pressure sensor is used to detect the pressure at the outlet of the evaporator, and the second pressure sensor is used to detect the pressure at the inlet of the compressor.

[0036] Optionally, the refrigeration system may also include an oil separator, a dryer filter, and a sight glass;

[0037] The oil separator is located between the compressor's exhaust port and the condenser, and is used to filter out the lubricating oil present in the first refrigerant gas.

[0038] The dryer filter is located between the inlet of the condenser and the inlet of the evaporator, and is used to filter the refrigerant;

[0039] The sight glass is located between the dryer filter and the inlet of the evaporator and is used to observe the quality of the refrigerant.

[0040] The present invention provides a refrigeration system, which includes a compressor, a condenser, a switching assembly, and an evaporator in the main refrigeration circuit. The switching assembly includes a first solenoid valve and an electronic expansion valve. By adding the first solenoid valve and the electronic expansion valve to the main refrigeration circuit, the flow rate of the refrigerant liquid flowing into the evaporator can be precisely controlled. By controlling the flow rate of the refrigerant liquid flowing into the evaporator, the evaporation temperature of the evaporator can be adjusted, thereby achieving more precise control of the ambient temperature. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of exemplary embodiments of the present invention, the accompanying drawings used in describing the embodiments are briefly introduced below. Obviously, the accompanying drawings described are only a portion of the drawings of the embodiments to be described in this invention, and not all of the drawings. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a refrigeration system provided in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention;

[0044] Figure 3This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be fully described below with reference to the accompanying drawings in the embodiments of this invention, through specific implementation methods. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort fall within the protection scope of this invention.

[0050] This invention provides a refrigeration system. Figure 1 This is a schematic diagram of the structure of a refrigeration system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the refrigeration system 10 includes a compressor 100, a condenser 200, a switching assembly 300, and an evaporator 400 connected in series on the main refrigeration circuit a1. The compressor's discharge port 100A is connected to the condenser's inlet 200A, and the condenser 200 is used to liquefy the first refrigerant gas discharged from the compressor 100 into a refrigerant liquid. The evaporator's inlet 400A is connected to the condenser's outlet 200B, and the evaporator 400 is used to evaporate the refrigerant liquid into a second refrigerant gas. The pressure of the first refrigerant gas is higher than the pressure of the second refrigerant gas, and the temperature of the first refrigerant gas is... The temperature is higher than that of the second refrigerant gas; the compressor inlet 100B is connected to the evaporator outlet 400B, and the evaporator 400 is used to discharge the second refrigerant gas into the compressor 100; the switching assembly 300 includes a first solenoid valve 310 and an electronic expansion valve 320 arranged in series, which are sequentially arranged in series on the main refrigeration circuit a1 between the condenser outlet 200B and the evaporator inlet 400A; the first solenoid valve 310 is used to control the flow and cut-off of the refrigerant, and the electronic expansion valve 320 is used to control the flow rate of the refrigerant.

[0051] The refrigeration system 10 regulates the temperature of the environment by including a compressor 100, a condenser 200, a switching device 300, and an evaporator 400 on the main refrigeration circuit a1. Specifically, the compressor 100 is the core component of the entire refrigeration system 10. Low-temperature, low-pressure refrigerant gas enters through the compressor's inlet 100B, is compressed internally, and then discharged as high-temperature, high-pressure refrigerant gas at the compressor's outlet 100A. The compressor 100 provides the power for the circulation of the entire refrigeration system 10. Furthermore, a second refrigerant gas enters through the compressor's inlet 100B, and a first refrigerant gas is discharged through the compressor's outlet 100A. The pressure and temperature of the first refrigerant gas are higher than those of the second refrigerant gas. For example, the compressor 100 can be a ZF18KQE model; this embodiment of the invention does not limit the specific model of the compressor 100. The condenser 200 has a condensing fan, which condenses the high-temperature, high-pressure refrigerant gas discharged from the compressor 100, i.e., the first refrigerant gas, into a refrigerant liquid, facilitating its flow in the main refrigeration circuit a1 and completing the circulation process of the refrigeration system 10. For example, the condenser 200 can be a model number T210762T, and the condensing fan can be a model number YWF4E-400S. This embodiment of the invention does not limit the specific model of the condenser 200. The refrigerant liquid flows into the evaporator 400 under the control of the switching device 300. The evaporator 400 evaporates the refrigerant liquid to form a low-temperature, low-pressure refrigerant gas, i.e., the second refrigerant gas. During the evaporation process, heat is absorbed, causing the ambient temperature to decrease. For example, the evaporator 400 can be a model number T210762T. This embodiment of the invention does not limit the specific model of the evaporator 400.

[0052] The switching device 300 installed on the main refrigeration circuit a1 includes a first solenoid valve 310 and an electronic expansion valve 320, enabling better control of the flow rate of refrigerant into the evaporator 400. Specifically, the first solenoid valve 310 can control the flow state and flow rate of the refrigerant flowing out of the condenser 200, adjusting the refrigerant temperature and pressure to facilitate control of the flow rate of refrigerant into the evaporator 400, thus achieving temperature regulation through the evaporator 400. Furthermore, the addition of the electronic expansion valve 320 allows for a 45-200 step adjustment range, precisely controlling the flow rate of refrigerant entering the evaporator 400, accurately regulating the evaporation temperature of the evaporator 400, preventing excessive refrigerant inflow, and significantly reducing temperature overshoot. This improves the working efficiency of the refrigeration system 10, avoids energy waste, and achieves precise temperature control. For example, the first solenoid valve 310 can be SEV-603DXF, the electronic expansion valve 320 can be UKV 25, and the electronic expansion coil inside the electronic expansion valve 320 can be UKV-A044. This embodiment of the invention does not limit the specific model of the switching device 300. By combining the first solenoid valve 310 and the electronic expansion valve 320, the energy-saving effect of the cooling system 10 is better demonstrated. For example, when testing the charging and discharging of lithium batteries under various temperature conditions, a test chamber including the cooling system 10 can accurately provide the required test environment temperature for the lithium batteries. The cooling system 10 provided in this embodiment of the invention can also be used for the cooling environment of test chambers required for other experiments; this embodiment of the invention does not specifically limit its use in this regard.

[0053] In summary, the refrigeration system provided by the embodiments of the present invention achieves precise control of the refrigeration temperature by setting a switching device including a first solenoid valve and an electronic expansion valve on the main refrigeration circuit, thereby improving the working efficiency of the refrigeration system. Furthermore, the combined use of the electronic expansion valve and the first solenoid valve can solve the problem of high energy consumption in existing refrigeration systems.

[0054] Optionally, the air outlet direction of the evaporator 400 is horizontal. By adding a return air regulating grille before the evaporator inlet 400A and a rectifying stainless steel wire mesh after the evaporator outlet 400B, the temperature distribution at the inlet and outlet of the evaporator 400 can be balanced.

[0055] Figure 2 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention, for reference. Figure 1 and Figure 2As shown, the refrigeration system 10 also includes a double-layer distributor 500, which is connected in series on the main refrigeration circuit a1 between the electronic expansion valve 320 and the inlet 400A of the evaporator. The double-layer distributor 500 includes a first capillary tube 510 and a second capillary tube 520. The inlet 400A of the evaporator includes a first access point 400A1 and a second access point 400A2. Along the height direction h of the evaporator 400, the first access point 400A1 is located above the second access point 400A2. The first capillary tube 510 is connected to the first access point 400A1, and the second capillary tube 520 is connected to the second access point 400A2. The first capillary tube 510 and the second capillary tube 520 are used to control the flow of refrigerant into the evaporator 400.

[0056] The refrigeration system 10 also includes a double-layer distributor 500, which is located at the inlet 400A of the evaporator. The refrigerant on the main refrigeration circuit a1 flows into the evaporator 400 through the double-layer distributor 500, which better achieves the uniform distribution of the refrigerant in the evaporator 400 and makes the surface temperature of the evaporator 400 uniform.

[0057] Specifically, the double-layer distributor 500 includes a first capillary tube 510 and a second capillary tube 520, which provide two flow paths for the refrigerant, thus achieving refrigerant distribution. Further, the evaporator inlet 400A includes a first access point 400A1 and a second access point 400A2. The first access point 400A1 is connected to the first capillary tube 510, allowing a portion of the refrigerant to enter the evaporator 400 through the first access point 400A1. The second access point 400A2 is connected to the second capillary tube 520, allowing another portion of the refrigerant to enter the evaporator 400 through the second access point 400A2. The first access point 400A1 and the second access point 400A2 are not horizontally positioned; along the height h of the evaporator 400, the first access point 400A1 is located above the second access point 400A2, preventing uneven refrigerant distribution due to differences in the evaporator 400's height. By setting up a double-layer distributor, the temperature difference at a height of 400 mm in the evaporator can be reduced, and the refrigerant can be evenly distributed.

[0058] Continue to refer to Figure 1 and Figure 2 As shown, the switching assembly 300 in the refrigeration system 10 also includes a first ball valve 330 and a second ball valve 340; the first ball valve 330 is located on the first capillary tube 510 and is used to control the flow rate of refrigerant flowing into the evaporator 400 through the first capillary tube 510; the second ball valve 340 is located on the second capillary tube 520 and is used to control the flow rate of refrigerant flowing into the evaporator 400 through the second capillary tube 520.

[0059] The switching device 300 further includes a first ball valve 330 and a second ball valve 340, which are located on the capillary tube to control the flow rate of refrigerant flowing through the capillary tube. Specifically, the first ball valve 330 is located on the first capillary tube 510, and the second capillary tube 340 is located on the second capillary tube 520. The first ball valve 330 can be controlled to coarsely adjust the flow rate of refrigerant flowing into the evaporator 400 through the first access point 400A1, and the second ball valve 340 can be controlled to coarsely adjust the flow rate of refrigerant flowing into the evaporator 400 through the second access point 400A2. For example, the first ball valve 330 and the second ball valve 340 can be of model RBV10C; the specific type of ball valve is not limited in this embodiment of the invention. By adding the first ball valve 330 on the first capillary tube 510 and the second ball valve 340 on the second capillary tube 520, the flow rate of refrigerant entering the evaporator 400 is further controlled, achieving more precise temperature regulation of the refrigeration system 10.

[0060] Continue to refer to Figure 1 and Figure 2 As shown, the switching assembly 300 in the refrigeration system 10 also includes an evaporation pressure regulating valve 350; the evaporation pressure regulating valve 350 is located on the main refrigeration circuit a1 between the outlet 400B of the evaporator and the inlet 100B of the compressor, and is used to regulate the gas pressure at the outlet 400B of the evaporator.

[0061] The switching device 300 also includes an evaporation pressure regulating valve 350, which is located at the outlet 400B of the evaporator. The low-temperature, low-pressure second refrigerant gas discharged from the outlet 400B of the evaporator is prone to frost formation at the outlet 400B under low temperature and pressure conditions, affecting the operating efficiency of the evaporator 400. For example, the evaporation pressure regulating valve 350 can be of model EPR-1605D; this embodiment of the invention does not limit the specific model of the evaporation pressure regulating valve 350. By adding an evaporation pressure regulating valve 350 at the outlet 400B of the evaporator, the gas pressure at the outlet 400B of the evaporator can be regulated, preventing frost formation on the evaporator.

[0062] Figure 3 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention, for reference. Figures 1 to 3 As shown, the refrigeration system 10 also includes a first cold bypass circuit a2; the switching assembly 300 also includes a liquid injection valve 360 ​​and a first cold expansion valve 370; the compressor 100, condenser 200, liquid injection valve 360 ​​and first cold expansion valve 370 are connected in series in the first cold bypass circuit a2; the liquid injection valve 360 ​​is used to transfer refrigerant to the compressor inlet 100B, and the first cold expansion valve 370 is used to control the flow rate of refrigerant entering the compressor 100.

[0063] The refrigeration system 10 also includes a first cold bypass circuit a2, in which a portion of the refrigerant, instead of being evaporated in the evaporator 400 to become a low-temperature, low-pressure second refrigerant gas, flows directly into the compressor 100 through the first cold bypass circuit a2, adjusting the temperature at the compressor's inlet 100B to prevent it from becoming too low. Specifically, the compressor 100, condenser 200, and switching device 300 are connected in series on the first cold bypass circuit a2.

[0064] Specifically, the switching device 300 also includes a liquid injection valve 360 ​​and a first cold expansion valve 370. The liquid injection valve 360 ​​and the first cold expansion valve 370 are located on the first cold bypass circuit a2 and are used to regulate the refrigerant flowing through the second bypass circuit a2. Specifically, the liquid injection valve 360 ​​is used to transfer refrigerant to the compressor inlet 100B, preventing the compressor inlet 100B from becoming too cold by introducing refrigerant. The first cold expansion valve 370 is used to finely control the flow rate of refrigerant entering the compressor 100, thereby regulating the temperature of the compressor inlet 100B. By adding the first cold bypass circuit a2 and the switching device 300 on the first cold bypass circuit a2, the refrigeration system 10 is optimized, and its operating efficiency is improved.

[0065] Figure 4 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention, for reference. Figure 2 and Figure 4 As shown, the refrigeration system 10 also includes a second cold bypass circuit a3; the switching assembly 300 also includes a second solenoid valve 380 and a thermostatic expansion valve 390; the compressor 100, condenser 200, second solenoid valve 380 and thermostatic expansion valve 390 are connected in series in the second cold bypass circuit a3; the second solenoid valve 380 is used to control the transfer of excess refrigerant to the compressor inlet 100B, and the thermostatic expansion valve 390 is used to control the flow rate of refrigerant entering the compressor 100.

[0066] The refrigeration system 10 also includes a second cold bypass circuit a3. When there is excessive refrigerant flowing out of the condenser 200—that is, when the evaporator 400 requires a certain amount of refrigerant to meet the ambient temperature requirements—the excess refrigerant flows back to the compressor's inlet 100B through the second bypass circuit a3. This prevents excessive refrigerant from causing the evaporator 400 to become too cold, resulting in excessive temperature overshoot. Specifically, the compressor 100, condenser 200, and switching device 300 are connected in series on the second cold bypass circuit a3.

[0067] Specifically, the switching device 300 also includes a second solenoid valve 380 and a thermostatic expansion valve 390. The second solenoid valve 380 and the thermostatic expansion valve 390 are located on the second cold bypass circuit a3 and are used to regulate excess refrigerant flowing through the second bypass circuit a3. Specifically, the second solenoid valve 380 controls the transfer of excess refrigerant to the compressor inlet 100B and prevents excess refrigerant from flowing into the evaporator 400, thus preventing excessive temperature overshoot due to cold inertia. The thermostatic expansion valve 390 is used to finely control the flow rate of refrigerant entering the compressor 100. For example, the second solenoid valve 380 may be of model SEV-603DXF, and the thermostatic expansion valve 390 may be of model T2-068Z3400. This embodiment of the invention does not limit the specific model of the switching device 300. By adding a second cold bypass circuit a3 and adding a switching device 300 to the second cold bypass circuit a3, the cooling system 10 is optimized and its working efficiency is improved.

[0068] Figure 5 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention, for reference. Figure 2 and Figure 5 As shown, the refrigeration system 10 also includes a first thermal bypass circuit a4; the switching assembly 300 also includes a first thermal bypass solenoid valve 3100 and an energy regulating valve 3110; the compressor 100, the first thermal bypass solenoid valve 3100 and the energy regulating valve 3110 are connected in series in the first thermal bypass circuit a4; the first thermal bypass solenoid valve 3100 is used to control the transmission of a portion of the first refrigerant gas to the compressor inlet 100B, and the energy regulating valve 3110 is used to control the flow rate of the first refrigerant gas entering the compressor 100.

[0069] The refrigeration system 10 also includes a first thermal bypass circuit a4, through which the first refrigerant gas that has not been condensed into refrigerant by the condenser 200 is transferred to the compressor 100. Since the temperature and pressure of the first refrigerant gas are both higher than those of the second refrigerant gas, this avoids the phenomenon of excessively low suction pressure at the compressor inlet 100B caused by only the low-temperature, low-pressure first refrigerant gas flowing into the compressor. Specifically, the compressor 100 and the switching device 300 are connected in series on the first thermal bypass circuit a4.

[0070] Specifically, the switching device 300 also includes a first thermal bypass solenoid valve 3100 and an energy regulating valve 3110. The first thermal bypass solenoid valve 3100 and the energy regulating valve 3110 are located on the first thermal bypass circuit a4 and are used to regulate the first refrigerant gas flowing through the first thermal bypass circuit a4. The first refrigerant gas is mainly liquefied through the condenser 200. The first thermal bypass solenoid valve 3100 controls the transmission of a portion of the first refrigerant gas to the compressor inlet 100B, regulating the flow rate of the high-temperature gas entering the compressor inlet 100B to prevent the suction pressure of the compressor 100 from being too low. The energy regulating valve 3110 is used to finely control the flow rate of the first refrigerant gas entering the compressor 100. For example, the first thermal bypass solenoid valve 3100 may be of model SEV-603DXF, and the energy regulating valve 3110 may be of model ACP7. This embodiment of the invention does not limit the specific model of the switching device 300. By adding a first thermal bypass circuit a4 and adding a switching device 300 to the first thermal bypass circuit a4, the cooling system 10 is optimized and its working efficiency is improved.

[0071] Figure 6 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention, for reference. Figure 2 and Figure 6 As shown, the refrigeration system 10 also includes a second heat bypass circuit a5; the switching assembly 300 also includes a second heat bypass solenoid valve 3120 and a third ball valve 3130; the compressor 100, the second heat bypass solenoid valve 3120, the third ball valve 3130 and the evaporator 400 are connected in series in the second heat bypass circuit a5; the second heat bypass solenoid valve 3120 is used to control the transmission of a portion of the first refrigerant gas to the inlet 400A of the evaporator, and the third ball valve 3130 is used to control the flow rate of the first refrigerant gas entering the evaporator 400.

[0072] The refrigeration system 10 also includes a second thermal bypass circuit a5, which transmits the first refrigerant gas that has not been condensed into refrigerant in the condenser 200 to the evaporator 400 through the first thermal bypass circuit a4. Since the first refrigerant gas has a higher temperature and pressure, it replenishes the evaporator 400, preventing low pressure in the evaporator 400 when the temperature is too low. Specifically, the compressor 100, the second thermal bypass solenoid valve 3120, the third ball valve 3130, and the evaporator 400 are connected in series on the second thermal bypass circuit a5.

[0073] Specifically, the switching device 300 also includes a second heat bypass solenoid valve 3120 and a third ball valve 3130. The second heat bypass solenoid valve 3120 and the third ball valve 3130 are located on the second heat bypass circuit a5 and are used to regulate the first refrigerant gas flowing through the second heat bypass circuit a5. The first refrigerant gas is mainly liquefied through the condenser 200. The second heat bypass solenoid valve 3120 controls the transmission of a portion of the first refrigerant gas to the evaporator inlet 400A, regulating the flow rate of the high-temperature gas entering the evaporator inlet 400A to prevent the suction pressure of the evaporator 400 from being too low. The third ball valve 3130 is used to finely control the flow rate of the first refrigerant gas entering the evaporator 400. For example, the model of the second heat bypass solenoid valve 3120 can be SEV-603DXF. This embodiment of the invention does not limit the specific type of the switching device 300. By adding a second heat bypass circuit a5 and adding a switching device 300 to the second heat bypass circuit a5, the cooling system 10 is optimized and its working efficiency is improved.

[0074] Figure 7 This is a schematic diagram of another refrigeration system provided in an embodiment of the present invention, for reference. Figures 1 to 7 As shown, the refrigeration system 10 mainly includes a main refrigeration circuit a1 to achieve a cyclic refrigeration process, precisely regulating the ambient temperature. Furthermore, in addition to the main refrigeration circuit a1, the refrigeration system 10 may also include a first cold bypass circuit a2, a second cold bypass circuit a3, a first hot bypass circuit a4, and a second hot bypass circuit a5 to indicate the operating efficiency of the refrigeration system. Exemplarily, the refrigeration system 10 may include one or more of the above-mentioned bypasses besides the main refrigeration circuit a1; this embodiment of the invention does not impose specific limitations on this.

[0075] Continue to refer to Figure 7 As shown, the main refrigeration circuit a1 also includes a temperature detection module T and a pressure detection module P; the temperature detection module T includes a first temperature sensor T1, a second temperature sensor T2, a third temperature sensor T3, and a fourth temperature sensor T4; the first temperature sensor T1 is used to detect the temperature of the compressor's exhaust port 100A, the second temperature sensor T2 is used to detect the temperature of the evaporator's outlet 400B, the third temperature sensor T3 is used to detect the temperature of the compressor's inlet 100B, and the fourth temperature sensor T4 is used to detect the temperature of the condenser 200; the pressure detection module P includes a first pressure sensor P1 and a second pressure sensor P2; the first pressure sensor P1 is used to detect the pressure of the evaporator's outlet 400B, and the second pressure sensor P2 is used to detect the pressure of the compressor's inlet 100B.

[0076] Specifically, by adding temperature detection modules T and pressure detection modules P at different locations on the main cooling circuit a1, the temperature and pressure of each component on the main cooling circuit a1 can be detected to prevent abnormal temperature or pressure conditions, facilitate the transportation of the first refrigeration gas, refrigerant and second refrigeration gas, and realize the regulation of ambient temperature by the refrigeration system 10.

[0077] Specifically, the temperature detection module T includes a first temperature sensor T1, a second temperature sensor T2, a third temperature sensor T3, and a fourth temperature sensor T4. The first temperature sensor T1 detects the temperature of the exhaust port 100A of the compressor that discharges the first refrigerant gas; the second temperature sensor T2 detects the temperature of the outlet 400B of the evaporator that discharges the second refrigerant gas; the third temperature sensor T3 detects the temperature of the inlet 100B of the compressor that receives the second refrigerant gas; and the fourth temperature sensor T4 detects the temperature of the condenser that produces the refrigerant. When the temperature is abnormal or the user requires adjustment of the ambient temperature, the temperature can be adjusted and the abnormal situation can be troubleshooted by adjusting the switch 300 on the refrigeration system 10. For example, the first temperature sensor T1 can be an NTC sensor and is resistant to high temperatures; the second and third temperature sensors T2 and T3 can be PT100 sensors; and the fourth temperature sensor T3 can be an NTC sensor. This embodiment of the invention does not limit the specific model of the temperature detection module T. Furthermore, the pressure detection module P includes a first pressure sensor P1 and a second pressure sensor P2. The first pressure sensor P1 detects the pressure at the outlet 400B of the evaporator that discharges the second refrigerant gas, while the second pressure sensor P2 detects the pressure at the inlet 100B of the compressor that discharges the second refrigerant gas. If the pressure is abnormal, the pressure can be adjusted and the abnormality can be investigated by adjusting the switch 300 on the refrigeration system 10. For example, the specifications of the first pressure sensor P1 and the second pressure sensor P2 can be XSK-AC10B-107. This embodiment of the invention does not limit the specific model of the pressure detection module P. By adding the temperature detection module T and the pressure detection module P, the refrigeration system 10 becomes safer, more reliable, and more energy-efficient.

[0078] Optionally, after the condenser 200 condenses the first refrigerant gas into the refrigerant, a pressure controller (not shown in the figure) can be added to the main refrigeration circuit a1 before the refrigerant flows into the evaporator 400. The pressure controller can regulate the pressure of the main refrigeration circuit a1 and control the rate at which the refrigerant flows into the evaporator 400. For example, the pressure controller model can be HNS-C130XM1.

[0079] Optionally, multiple needle valves can be added to the compressor inlet 100B and condenser 200 on the main refrigeration circuit a1 to further control the flow rate of the second refrigeration gas or refrigerant. The needle valve model can be SU-04X. This embodiment of the invention does not limit the specific model of the needle valve.

[0080] Continue to refer to Figure 7 As shown, the refrigeration system 10 also includes an oil separator 600, a dryer filter 700, and a sight glass 800; the oil separator 600 is located between the compressor discharge port 100A and the condenser 200, and is used to filter out the lubricating oil present in the first refrigerant gas; the dryer filter 700 is located between the condenser 200 and the evaporator inlet 400A, and is used to filter the refrigerant; the sight glass 800 is located between the dryer filter 700 and the evaporator inlet 400A, and is used to observe the quality of the refrigerant.

[0081] The refrigeration system 10 also includes an oil separator 600, which separates the lubricating oil from the first refrigeration gas discharged from the compressor 100 to ensure safe and efficient operation of the device. Based on the oil separation principle of reducing airflow velocity and changing airflow direction, oil particles in the first refrigeration gas with higher temperature and pressure are separated under gravity. The oil separator 600 then transmits the separated lubricating oil back to the compressor 100 through an oil return pipe (not shown in the figure), ensuring the refrigeration operation of the refrigeration system 10 continues cyclically. For example, the specification of the oil separator 600 can be A-WZ 55824; this embodiment of the invention does not limit the specific model of the oil separator 600.

[0082] The refrigeration system 10 also includes a dryer filter 700 and a sight glass 800, located between the condenser 200 and the inlet 400A of the evaporator. The dryer filter 700 filters impurities from the refrigerant, ensuring its quality. The sight glass 800 allows observation of the refrigerant's quality and water content. For example, the dryer filter 700 may be of model EK 084S, and the sight glass 800 may be of model HMI-STT4. This embodiment of the invention does not limit the specific models of the dryer filter 700 and the sight glass 800. The addition of the dryer filter 700 and the sight glass 800 ensures more stable operation and higher efficiency of the refrigeration system 10.

[0083] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0084] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A refrigeration system, characterized in that, This includes a compressor, condenser, switching assembly, and evaporator connected in series on the main refrigeration circuit; The compressor's exhaust port is connected to the condenser's inlet, and the condenser is used to liquefy the first refrigerant gas discharged from the compressor into a refrigerant. The inlet of the evaporator is connected to the outlet of the condenser, and the evaporator is used to evaporate the refrigerant into a second refrigerant gas; wherein the pressure of the first refrigerant gas is higher than the pressure of the second refrigerant gas, and the temperature of the first refrigerant gas is higher than the temperature of the second refrigerant gas. The compressor's inlet is connected to the evaporator's outlet, and the evaporator is used to discharge the second refrigerant gas into the compressor; The switching assembly includes a first solenoid valve and an electronic expansion valve connected in series. The first solenoid valve and the electronic expansion valve are sequentially connected in series on the main refrigeration line between the outlet of the condenser and the inlet of the evaporator. The first solenoid valve is used to control the flow and cut-off of the refrigerant, and the electronic expansion valve is used to control the flow rate of the refrigerant. The evaporator has a horizontal air outlet direction. A return air regulating grille is added in front of the evaporator inlet, and a rectifying stainless steel wire mesh is added after the evaporator outlet to balance the temperature distribution at the evaporator inlet and outlet. The refrigeration system also includes a double-layer distributor, which is connected in series on the main refrigeration line between the electronic expansion valve and the inlet of the evaporator; the double-layer distributor is used to reduce the temperature difference along the height of the evaporator. The double-layer distributor includes a first capillary tube and a second capillary tube. The inlet of the evaporator includes a first access point and a second access point. Along the height direction of the evaporator, the first access point is located above the second access point. The first capillary tube is connected to the first access point, and the second capillary tube is connected to the second access point. The first capillary tube and the second capillary tube are used to control the flow of the refrigerant into the evaporator. The refrigeration system also includes a first cold bypass circuit; The switching assembly also includes a liquid injection valve and a first cold expansion valve; The compressor, the condenser, the liquid injection valve, and the first cold expansion valve are connected in series in the first cold bypass circuit; the liquid injection valve is used to transmit the refrigerant to the air inlet of the compressor, and the first cold expansion valve is used to control the flow rate of the refrigerant entering the compressor.

2. The refrigeration system according to claim 1, characterized in that, The switching assembly further includes a first ball valve and a second ball valve; The first ball valve is located on the first capillary tube and is used to control the flow rate of the refrigerant flowing into the evaporator through the first capillary tube; The second ball valve is located on the second capillary tube and is used to control the flow rate of the refrigerant flowing into the evaporator through the second capillary tube.

3. The refrigeration system according to claim 1, characterized in that, The switching assembly also includes an evaporation pressure regulating valve; The evaporation pressure regulating valve is located on the main refrigeration line between the outlet of the evaporator and the inlet of the compressor, and is used to regulate the outlet gas pressure of the evaporator.

4. The refrigeration system according to claim 1, characterized in that, The refrigeration system also includes a second cold bypass circuit; The switching assembly also includes a second solenoid valve and a thermal expansion valve; The compressor, the condenser, the second solenoid valve, and the thermostatic expansion valve are connected in series in the second cold bypass circuit; the second solenoid valve is used to control the transfer of excess refrigerant to the compressor inlet, and the thermostatic expansion valve is used to control the flow rate of the refrigerant entering the compressor.

5. The refrigeration system according to claim 1, characterized in that, The refrigeration system also includes a first heat bypass circuit; The switching assembly also includes a first thermal bypass solenoid valve and an energy regulating valve; The compressor, the first heat bypass solenoid valve, and the energy regulating valve are connected in series in the first heat bypass circuit; the first heat bypass solenoid valve is used to control the transmission of a portion of the first refrigerant gas to the air inlet of the compressor, and the energy regulating valve is used to control the flow rate of the first refrigerant gas entering the compressor.

6. The refrigeration system according to claim 1, characterized in that, The refrigeration system also includes a second heat bypass circuit; The switching assembly also includes a second thermal bypass solenoid valve and a third ball valve; The compressor, the second heat bypass solenoid valve, the third ball valve, and the evaporator are connected in series in the second heat bypass circuit; the second heat bypass solenoid valve is used to control the transmission of a portion of the first refrigerant gas to the inlet of the evaporator, and the third ball valve is used to control the flow rate of the first refrigerant gas entering the evaporator.

7. The refrigeration system according to claim 1, characterized in that, The main cooling circuit also includes a temperature detection module and a pressure detection module; The temperature detection module includes a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor; The first temperature sensor is used to detect the temperature of the compressor's exhaust port, the second temperature sensor is used to detect the temperature of the evaporator's outlet, the third temperature sensor is used to detect the temperature of the compressor's inlet, and the fourth temperature sensor is used to detect the temperature of the condenser. The pressure detection module includes a first pressure sensor and a second pressure sensor; The first pressure sensor is used to detect the pressure at the outlet of the evaporator, and the second pressure sensor is used to detect the pressure at the inlet of the compressor.

8. The refrigeration system according to claim 3, characterized in that, The refrigeration system also includes an oil separator, a dryer filter, and a sight glass; The oil separator is located between the compressor's exhaust port and the condenser, and is used to filter out the lubricating oil present in the first refrigerant gas. The dryer filter is located between the inlet of the condenser and the inlet of the evaporator, and is used to filter the refrigerant; The sight glass is located between the dryer filter and the inlet of the evaporator and is used to observe the quality of the refrigerant.

Images