Separation and purification device, refrigeration component, system, purification method and storage medium

Abstract

The present invention provides a separation and purification device, a refrigeration component, a system, a purification method and a storage medium, which relate to the technical field of refrigeration and solve the technical problem that negative-pressure refrigerant is easily mixed with non-condensable gases, affecting the heat exchange efficiency. The separation and purification device includes an evacuation chamber, which is a closed cavity structure, connected to the refrigeration component, and can separate and purify the mixed medium conveyed by the refrigeration component and then convey it back to the refrigeration component; a refrigeration subsystem, connected to the evacuation chamber to provide the cooling energy required for separation and purification; and a gas extraction system, connected to the evacuation chamber to discharge the separated non-condensable gases. The present invention can cool the refrigerant in the mixed gas, completely cool the gaseous refrigerant into a liquid, and separate it from the non-condensable gases, thereby effectively separating the non-condensable gases from the refrigerant, returning the separated refrigerant to the refrigeration component, improving the heat exchange efficiency of the refrigeration component, and ensuring the normal use of the refrigeration component.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and particularly to a separation and purification device, a refrigeration component, a system, a purification method and a storage medium. Background Art

[0002] In recent years, global warming has become increasingly serious. In order to reduce greenhouse gas emissions and mitigate the greenhouse effect, R1233zd(E) is used as a refrigerant substitute in existing refrigeration systems. Its ODP = 0, GWP = 1.34, it is non-toxic and non-flammable, and it is currently the most ideal refrigerant substitute. However, R1233zd(E) belongs to a negative-pressure refrigerant, and it is easy to enter non-condensable gases such as air, which affects the heat exchange efficiency, resulting in a sharp decline in the operating energy efficiency of the air-conditioning unit and even unable to operate normally.

[0003] Therefore, separating non-condensable gases entering the air-conditioning unit from the refrigerant is crucial for the normal use of negative-pressure refrigerant air-conditioning units such as R1233zd(E). Summary of the Invention

[0004] The purpose of the present invention is to provide a separation and purification device, a refrigeration component, a system, a purification method and a storage medium to solve the technical problem in the prior art that negative-pressure refrigerants are easily mixed with non-condensable gases, affecting the heat exchange efficiency.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] In a first aspect, a separation and purification device provided by the present invention includes

[0007] An evacuation chamber, which is a closed cavity structure, is connected to the refrigeration component, and can separate and purify the mixed medium transported by the refrigeration component and then transport it back to the refrigeration component;

[0008] A refrigeration subsystem, which is connected to the evacuation chamber to provide the cooling energy required for separation and purification;

[0009] An air extraction system, which is connected to the evacuation chamber to discharge the separated non-condensable gas.

[0010] As a further improvement of the present invention, the refrigeration subsystem includes a purification compressor, a fin heat exchanger and an evaporation coil connected by a second refrigerant pipeline, and the evaporation coil is arranged in the evacuation chamber; a first control member is arranged on the second refrigerant pipeline on the outlet side of the fin heat exchanger; a temperature sensor is arranged on the second refrigerant pipeline on the intake side of the purification compressor.

[0011] As a further improvement of the present invention, the inlet side of the second refrigerant pipeline is connected to the top of the evacuation chamber, and the outlet side is connected to the lower part of the evacuation chamber.

[0012] As a further improvement of the present invention, the first control member is a capillary tube, a thermostatic expansion valve, a fixed orifice plate or an electronic expansion valve.

[0013] As a further improvement of the present invention, the evaporation coil is a threaded tube, an annular coil or a serpentine coil, and is spirally arranged along the height direction of the evacuation chamber.

[0014] As a further improvement of the present invention, the evacuation chamber is arranged above the refrigeration assembly to form a height difference with gravitational potential energy therebetween.

[0015] As a further improvement of the present invention, a liquid level switch is further provided at the lower position inside the evacuation chamber.

[0016] As a further improvement of the present invention, a baffle plate is provided inside the evacuation chamber.

[0017] As a further improvement of the present invention, the number of the baffle plates is multiple, and they are evenly distributed along the height direction of the evacuation chamber.

[0018] As a further improvement of the present invention, the baffle plates are arranged on the opposite side walls of the evacuation chamber.

[0019] As a further improvement of the present invention, the air extraction system includes a vacuum pump, the vacuum pump is connected to the upper part of the evacuation chamber through an air extraction pipeline, and an evacuation valve is arranged on the air extraction pipeline.

[0020] As a further improvement of the present invention, the evacuation valve is a solenoid valve.

[0021] As a further improvement of the present invention, the number of the evacuation valves is two, and the directions of the two evacuation valves are opposite.

[0022] As a further improvement of the present invention, it further includes a first refrigerant pipeline and a third refrigerant pipeline connected between the refrigeration assembly and the evacuation chamber. One end of the first refrigerant pipeline is connected to the air inlet interface at the lower part of the evacuation chamber, and the other end is connected to the upper part of the refrigeration assembly; one end of the third refrigerant pipeline is connected to the liquid return interface at the lower part of the evacuation chamber, and the other end is connected to the middle part of the refrigeration assembly.

[0023] As a further improvement of the present invention, an air inlet valve is arranged on the first refrigerant pipeline; and / or, a liquid return valve is arranged on the third refrigerant pipeline.

[0024] As a further improvement of the present invention, the liquid return valve and the liquid level switch are in linkage control.

[0025] As a further improvement of the present invention, the air inlet valve and the liquid return valve are solenoid valves or electronic expansion valves.

[0026] As a further improvement of the present invention, the intake interface is located above the liquid return interface in the vertical direction.

[0027] As a further improvement of the present invention, the first refrigerant pipeline is connected between 2 / 3 and 3 / 4 of the height of the refrigeration component.

[0028] As a further improvement of the present invention, the third refrigerant pipeline is connected between 1 / 3 and 1 / 2 of the height of the refrigeration component.

[0029] In a second aspect, a refrigeration component provided by the present invention includes the separation and purification device.

[0030] As a further improvement of the present invention, the refrigeration component is a condenser.

[0031] In a third aspect, a refrigeration system provided by the present invention includes the refrigeration component.

[0032] As a further improvement of the present invention, the refrigeration system is a chiller.

[0033] In a fourth aspect, a purification method provided by the present invention is a method for purifying a refrigerant by using the separation and purification device, including

[0034] When the refrigerant separation and purification conditions are met, the mixed gas starts to be transported into the evacuation chamber, and the separation and purification device receives a start signal and starts to perform purification and separation of the mixed gas;

[0035] Obtain the suction temperature value Ttcx1 of the purification compressor in the refrigeration subsystem;

[0036] Based on the comparison between the suction temperature value Ttcx1 of the purification compressor and the target suction temperature value Ttcs of the purification compressor, a comparison result is obtained;

[0037] According to the comparison result, subsequent preset processing is performed.

[0038] As a further improvement of the present invention, according to the comparison result, the subsequent preset processing includes

[0039] S1. Shut down the separation and purification device. When the refrigerant separation and purification conditions are met again, the separation and purification device is restarted, and this cycle is repeated to obtain and compare the temperature again;

[0040] Or,

[0041] S2. Stop the transportation of the mixed gas, send the separated refrigerant back to the condenser, the air extraction system receives a start signal and extracts the non-condensable gas separated out. After a set time Tcx2, the air extraction system receives a shutdown signal and stops air extraction, and this cycle is repeated to obtain and compare the temperature again.

[0042] As a further improvement of the present invention, the comparison result includes

[0043] A1. The suction temperature value Ttcx1 of the purification compressor > the target suction temperature value Ttcs of the purification compressor, and lasts for a set time Tcx1;

[0044] Or

[0045] A2. The suction temperature value Ttcx1 of the purification compressor ≤ the target suction temperature value Ttcs of the purification compressor;

[0046] When the comparison result is A1, perform the S1 process; when the comparison result is A2, perform the S2 process.

[0047] As a further improvement of the present invention, the range of the target suction temperature value Ttcs of the purification compressor is 0 to -20 °C.

[0048] In a fifth aspect, the present invention provides a storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the purification method are implemented.

[0049] The present invention has the following beneficial effects compared with the prior art:

[0050] The separation and purification device provided by the present invention can provide low-temperature cooling energy for the mixed gas in the refrigeration component through the refrigeration subsystem, can cool the refrigerant in the mixed gas, completely cool the gas refrigerant into a liquid, separate it from the non-condensable gas, thereby effectively separating the non-condensable gas from the refrigerant, and returning the separated refrigerant to the refrigeration component to improve the heat exchange efficiency of the refrigeration component and ensure the normal use of the refrigeration component. Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0052] Figure 1 is a schematic structural diagram of the separation and purification device of the present invention;

[0053] Figure 2 is a schematic structural diagram of the evacuation chamber in the separation and purification device of the present invention;

[0054] Figure 3 is a flowchart of the purification method of the present invention.

[0055] In the figure: 1. Condenser; 2. Intake valve; 3. Liquid return valve; 4. Purification compressor; 5. Finned heat exchanger; 6. Thermostatic expansion valve; 7. Evaporator coil; 8. Liquid level switch; 9. Evacuation chamber; 10. Evacuation valve; 11. Vacuum pump; 21. Intake interface; 31. Liquid return interface; 41. Temperature sensor; 71. Liquid inlet interface; 72. Gas return interface; 91. Air extraction interface; 92. Baffle plate. Detailed implementation manners

[0056] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope protected by the present invention.

[0057] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the separation and purification device of the present invention. The present invention provides a separation and purification device, including

[0058] An evacuation chamber 9, which is a closed cavity structure, is connected to the refrigeration component, and can separate and purify the mixed medium transported by the refrigeration component and then transport it back to the refrigeration component; it should be noted here that in this embodiment, the refrigeration component is a condenser 1, and the following will be specifically described taking the condenser 1 as an example.

[0059] A refrigeration subsystem, which is connected to the evacuation chamber 9 to provide the cooling energy required for separation and purification. Through the refrigeration subsystem, the mixed gas input into the evacuation chamber 9 can be cooled down, and the refrigerant in the mixed gas can be cooled into a liquid. Since the non-condensable gas does not condense, when the refrigerant condenses into a liquid, it is automatically separated from the non-condensable gas. The refrigerant is located at the bottom of the evacuation chamber 9 under the action of gravity, while the non-condensable gas is located at the top of the evacuation chamber 9;

[0060] An air extraction system, which is connected to the evacuation chamber 9 to discharge the separated non-condensable gas.

[0061] The separation and purification device provided by the present invention can provide low-temperature cooling energy for the mixed gas in the condenser 1 through the refrigeration subsystem, can cool the refrigerant in the mixed gas, completely cool the gaseous refrigerant into a liquid, and separate it from the non-condensable gas, so as to effectively separate the non-condensable gas from the refrigerant, return the separated refrigerant to the condenser 1, improve the heat exchange efficiency of the condenser 1, and ensure the normal use of the condenser 1.

[0062] In one embodiment, the refrigeration subsystem includes a purification compressor 4, a fin heat exchanger 5, and an evaporation coil 7 connected through a second refrigerant pipeline. The evaporation coil 7 is arranged in an evacuation chamber 9; a first control member is provided on the second refrigerant pipeline on the outlet side of the fin heat exchanger 5; a temperature sensor 41 is provided on the second refrigerant pipeline on the intake side of the purification compressor 4. It should be noted here that the low-temperature refrigerant circulating in the second refrigerant pipeline enters the evaporation coil 7 and forms a cold surface on the surface of the evaporation coil 7. The cold quantity released from the cold surface into the evacuation chamber 9 and the heat exchange between the cold surface and the mixed gas are carried out, thereby cooling and condensing the mixed gas.

[0063] In specific implementation, for the independent refrigeration subsystem of the second refrigerant pipeline, after being compressed by the purification compressor, it enters the fin heat exchanger for heat exchange, passes through the throttle and enters the evaporation coil through the liquid inlet interface, exchanges heat with the mixed gas, and then enters the purification compressor through the return air interface for compression, so as to realize the refrigeration cycle.

[0064] The first control member is used to control the refrigerant flow rate entering the evaporation coil 7 in the evacuation chamber 9; the temperature sensor 41 is used to measure the suction temperature of the purification compressor 4; the inlet side of the second refrigerant pipeline is connected to the top of the evacuation chamber 9, and the outlet side is connected to the lower part of the evacuation chamber 9, so that the refrigerant in the evaporation coil 7 flows from top to bottom.

[0065] In one embodiment, the first control member is a capillary tube, a thermostatic expansion valve 6, a fixed orifice plate, or an electronic expansion valve. Those skilled in the art can set different types of expansion valves according to actual needs. As Figure 1 shown, in this embodiment, the first control member is a thermostatic expansion valve 6.

[0066] In one embodiment, the evaporation coil 7 is a threaded tube, an annular coil, or a serpentine coil, which is spirally arranged along the height direction of the evacuation chamber 9. By setting the evaporation coil 7 to be spirally arranged, not only can the heat exchange area be increased, but also it can contact and exchange heat with the mixed gas in each area of the evacuation chamber 9, improving the cooling effect and the separation and purification effect. Those skilled in the art can set different types of coils according to actual needs.

[0067] In one embodiment, the evacuation chamber 9 is arranged above the condenser 1 to form a height difference with gravitational potential energy therebetween. Through such a structural setting, the refrigerant cooled into a liquid in the evacuation chamber 9 can automatically flow back to the condenser 1 under the action of gravity.

[0068] In one embodiment, as Figure 2 shown, Figure 2 is a schematic structural diagram of the evacuation chamber in the separation and purification device provided by the present invention. A liquid level switch 8 is further provided at the lower position inside the evacuation chamber 9.

[0069] The liquid level switch 8 is set at a certain height above the bottom of the evacuation chamber 9. When the liquid refrigerant accumulates to a certain extent and contacts the liquid level switch 8, liquid drainage and reflux can be carried out.

[0070] In one embodiment, a baffle 92 is arranged in the evacuation chamber 9. Baffles are provided at the edge of the evacuation chamber to improve the heat exchange efficiency between the mixed gas and the evaporation coil. No support needs to be added at the bottom end of the evacuation chamber, saving height space.

[0071] In specific implementation, a baffle is arranged on the inner side of the shell of the evacuation chamber. The gaseous refrigerant condenses into liquid on the surface of the evaporation coil, a vacuum is formed in the upper part of the evacuation chamber, and the mixed gas continuously enters the evacuation chamber through the air inlet interface. The baffle mainly plays a role of deflecting the flow, making full use of the heat exchange area of the evaporation coil and improving the heat exchange efficiency of the refrigerant separation device.

[0072] Further, the number of baffles 92 is multiple, and they are evenly distributed along the height direction of the evacuation chamber 9.

[0073] Furthermore, the baffles 92 are arranged on the opposite side walls of the evacuation chamber 9.

[0074] In one embodiment, the air extraction system includes a vacuum pump 11. The vacuum pump 11 is connected to the upper part of the evacuation chamber 9 through an air extraction pipeline, and an evacuation valve 10 is arranged on the air extraction pipeline.

[0075] It should be noted here that the inlet side of the second refrigerant pipeline is connected to the liquid inlet interface 71 at the top of the evacuation chamber 9, and the air extraction pipeline is connected to the air extraction interface 91 of the evacuation chamber 9. The air extraction interface 91 is located on the right side at the top end of the evacuation chamber 9, which is convenient for the pipeline connection of the air extraction system and saves height space. The liquid inlet interface 71 and the air extraction interface 91 are respectively located on both sides of the evacuation chamber 9. The outlet side of the second refrigerant pipeline is connected to the gas return interface 72 on one side of the lower part of the evacuation chamber 9. The gas return interface 72 and the air extraction interface 91 are respectively located on both sides of the evacuation chamber 9.

[0076] The air inlet interface and the liquid return interface are both arranged on the lower side of the evacuation chamber, which is convenient for pipeline connection.

[0077] Further, the evacuation valve 10 is an electromagnetic valve.

[0078] Furthermore, the number of evacuation valves 10 is two, and the directions of the two evacuation valves 10 are opposite.

[0079] In one embodiment, it further includes a first refrigerant pipeline and a third refrigerant pipeline connected between the condenser 1 and the evacuation chamber 9. The first refrigerant pipeline is used to transport the mixed gas in the condenser 1 into the evacuation chamber 9, and the third refrigerant pipeline is used to return the separated liquid refrigerant in the evacuation chamber 9 back to the condenser 1. One end of the first refrigerant pipeline is connected to the intake interface 21 at the lower part of the evacuation chamber 9, and the other end is connected to the upper part of the condenser 1. One end of the third refrigerant pipeline is connected to the liquid return interface 31 at the lower part of the evacuation chamber 9, and the other end is connected to the middle part of the condenser 1.

[0080] Specifically, the intake interface 21 is located below the return air interface 72.

[0081] In one embodiment, an intake valve 2 is provided on the first refrigerant pipeline; and / or, a liquid return valve 3 is provided on the third refrigerant pipeline.

[0082] Specifically, the liquid return valve 3 and the liquid level switch 8 are in linkage control. That is to say, when the liquid level switch 8 is turned on, that is, when the liquid refrigerant contacts the liquid level switch 8, the liquid return valve 3 is also activated and in an open state, thus starting the refrigerant reflux.

[0083] Furthermore, the intake valve 2 and the liquid return valve 3 are solenoid valves or electronic expansion valves.

[0084] Furthermore, the intake interface 21 is located above the liquid return interface 31 in the vertical direction. Specifically, the intake interface 21 is located below the evaporation coil 7, and the liquid return interface 31 is located at the bottom of the side wall of the evacuation chamber 9. By arranging the intake interface 21 at the lower part of the evacuation chamber 9, a countercurrent heat exchange effect is formed between the mixed gas and the evaporation coil.

[0085] Furthermore, the first refrigerant pipeline is connected between 2 / 3 - 3 / 4 of the height of the condenser 1. At this stage, the content of non-condensable gas in the condenser is the highest, which is beneficial to improving the separation and purification efficiency.

[0086] Furthermore, the third refrigerant pipeline is connected between 1 / 3 - 1 / 2 of the height of the condenser 1. By utilizing the height difference between the purification evacuation chamber and the liquid return port of the condenser of the chiller, the liquid refrigerant at the bottom of the evacuation chamber is returned to the condenser.

[0087] The separation and purification device provided by the present invention is provided with an independent refrigeration subsystem, which provides a low-temperature evaporation coil to cool the mixed gas refrigerant in the condenser, so that the gas refrigerant is completely cooled into a liquid and separated from the non-condensable gas. A liquid level switch is provided at the bottom of the evacuation chamber. When the liquid level switch is closed, the liquid return valve is synchronously opened. The third refrigerant pipeline, that is, the liquid return pipe, is connected to the condenser in the chiller. Relying on the height difference between the evacuation chamber and the condenser, the liquid refrigerant is slowly returned to the condenser, effectively accumulating the non-condensable gas in the evacuation chamber.

[0088] The separation and purification device provided by the present invention is equipped with a vacuum pump, and the extraction pipeline is provided with a double solenoid valve to prevent non-condensable gases from entering the system or the gas refrigerant in the system from being discharged due to the reverse conduction of the solenoid valve. When the evacuation condition is met, the non-condensable gases can be completely discharged out of the system through the vacuum pump, achieving the purpose of separation and purification.

[0089] As Figure 1 shown, a condenser 1 provided by the present invention includes the above-mentioned separation and purification device. Specifically, the separation and purification device is connected to the condenser 1 for separating and purifying the mixed gas at the top inside the condenser 1, and after separating and purifying the mixed gas, the liquid refrigerant can be returned to the condenser 1.

[0090] The condenser provided by the present invention is equipped with a separation and purification device. The mixed gas of the chiller condenser exchanges heat with the evaporation coil, completely cooling the gas refrigerant into a liquid and separating it from the non-condensable gases. The liquid refrigerant accumulates at the bottom of the evacuation chamber. When the liquid level switch 8 is closed, the liquid return valve is synchronously opened, and the liquid refrigerant at the bottom of the evacuation chamber is discharged to the chiller condenser. The non-condensable gases accumulate at the top of the evacuation chamber. When the evacuation condition is met, first open the liquid return valve, and at the same time close the intake valve, discharge the liquid refrigerant at the bottom of the evacuation chamber to the chiller condenser, and then start the vacuum pump to discharge the non-condensable gases at the top of the purification evacuation chamber out of the system.

[0091] The present invention provides a refrigeration system including the above-mentioned condenser 1.

[0092] As Figure 3 shown, Figure 3 is a flowchart of the purification method provided by the present invention. Specifically, a purification method provided by the present invention is a method for purifying the refrigerant of the mixed gas in the condenser provided by the present invention by using the above-mentioned separation and purification device, including

[0093] The first step is that when the refrigerant separation and purification condition is met, the mixed gas starts to be transported into the evacuation chamber 9, the separation and purification device receives the start signal, and starts to carry out the separation and purification of the mixed gas; the purification compressor 4, the fin heat exchanger 5, the thermostatic expansion valve 6, the intake valve 2, and the liquid return valve 3 are respectively controlled according to the original logic.

[0094] The second step is to obtain the suction temperature value Ttcx1 of the purification compressor in the refrigeration subsystem; the temperature sensor arranged at the suction port of the purification compressor transmits the detected suction temperature value Ttcx1 of the purification compressor to the main controller. The suction temperature target value of the purification compressor is Ttcs, and the main control system controls the opening and closing of the separation and purification device and the opening and closing of the air extraction system according to the detected suction temperature of the purification compressor;

[0095] Judge the magnitude relationship between the suction temperature value Ttcx1 of the purification compressor and the target value Ttcs of the suction temperature of the purification compressor. In the third step, based on the comparison between the suction temperature value Ttcx1 of the purification compressor and the target value Ttcs of the suction temperature of the purification compressor, obtain the comparison result;

[0096] In the fourth step, according to the comparison result, perform subsequent preset processing.

[0097] It should be noted here that the delivery of the mixed gas into the evacuation chamber 9 is achieved by opening the intake valve 2 in the first refrigerant pipeline. After the separation and purification device is started, the purification compressor 4, the fin heat exchanger 5, the thermostatic expansion valve 6, and the temperature sensor 41 all start to work, and the refrigerant in the first refrigerant pipeline starts to circulate.

[0098] In one embodiment, in the fourth step, according to the comparison result, perform subsequent preset processing, including

[0099] S1. Shut down the separation and purification device. When the refrigerant separation and purification conditions are met again, the separation and purification device is started again, and this cycle is repeated, and the temperature acquisition and comparison are performed again.

[0100] Or,

[0101] S2. Stop the delivery of the mixed gas, send the separated refrigerant back to the condenser, the air extraction system receives the start signal and extracts the non-condensable gas separated. After a continuous set time Tcx2, the air extraction system receives the shutdown signal and stops the air extraction, and this cycle is repeated, and the temperature acquisition and comparison are performed again.

[0102] In one embodiment, the comparison results include

[0103] A1. The suction temperature value Ttcx1 of the purification compressor > the target value Ttcs of the suction temperature of the purification compressor, and for a continuous set time Tcx1;

[0104] Or,

[0105] A2. The suction temperature value Ttcx1 of the purification compressor ≤ the target value Ttcs of the suction temperature of the purification compressor;

[0106] When the comparison result is A1, perform the S1 processing; when the comparison result is A2, perform the S2 processing.

[0107] Specifically, that is, when the suction temperature value Ttcx1 of the purification compressor is greater than the target suction temperature value Ttcs of the purification compressor, and the continuous setting time is Tcx1, then the S1 process is executed to shut down the separation and purification device. When the refrigerant separation and purification conditions are met again, the separation and purification device is started again, and this cycle is repeated. The temperature acquisition and comparison are carried out again, that is, the second and third steps are carried out, and the corresponding processing is executed according to the result of the third step. When A2, the suction temperature value Ttcx1 of the purification compressor is less than or equal to the target suction temperature value Ttcs of the purification compressor, it means that the evacuation condition is met, and the S2 process is executed to close the intake valve, stop the mixture gas delivery, send the separated refrigerant at the bottom of the evacuation chamber back to the condenser by opening the liquid return valve, close the liquid return valve, the gas extraction system receives the start signal, opens the evacuation valve and the vacuum pump, and extracts the non-condensable gas separated in the evacuation chamber out of the system. After the continuous setting time Tcx2, the gas extraction system receives the close signal, closes the evacuation valve and the vacuum pump to stop the gas extraction, and this cycle is repeated. The temperature acquisition and comparison are carried out again, that is, the second and third steps are carried out, and the corresponding processing is executed according to the result of the third step.

[0108] In one embodiment, the range of the target suction temperature value Ttcs of the purification compressor is 0 to -20°C.

[0109] Those skilled in the art can determine the target suction temperature value of the purification compressor according to actual needs.

[0110] The present invention provides a storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the above purification method are implemented.

[0111] First of all, it should be noted here that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0112] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0113] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0114] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0116] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0117] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A separation and purification device, characterized in that, including an evacuation chamber, which is a closed cavity structure, connected to a refrigeration assembly, and can separate and purify the mixed medium conveyed by the refrigeration assembly and then convey it back to the refrigeration assembly; a refrigeration subsystem, connected to the evacuation chamber to provide the cooling energy required for separation and purification; a gas extraction system, connected to the evacuation chamber to discharge the non-condensable gas after separation; the refrigeration subsystem includes a purification compressor, a fin heat exchanger and an evaporation coil connected by a second refrigerant pipeline, and the evaporation coil is arranged in the evacuation chamber; a first control member is arranged on the second refrigerant pipeline on the outlet side of the fin heat exchanger; a temperature sensor is arranged on the second refrigerant pipeline on the intake side of the purification compressor; the temperature sensor can obtain the suction temperature value of the purification compressor on the second refrigerant pipeline, and the main control system can control the opening and closing of the separation and purification device and the opening and closing of the gas extraction system according to the comparison relationship between the suction temperature value of the purification compressor and the target suction temperature value of the purification compressor.

2. The separation and purification device according to claim 1, wherein The inlet side of the second refrigerant pipeline is connected to the top of the evacuation chamber, and the outlet side is connected to the lower part of the evacuation chamber.

3. The separation and purification device according to claim 1, characterized in that, The evacuation chamber is arranged above the refrigeration assembly to form a height difference with gravitational potential energy between the two.

4. The separation and purification device according to claim 1, characterized in that, A liquid level switch is also arranged at the lower part inside the evacuation chamber.

5. The separation and purification device according to claim 1, characterized in that, Baffle plates are arranged inside the evacuation chamber.

6. The separation and purification device according to claim 5, characterized in that, The number of the baffle plates is multiple, and they are evenly distributed along the height direction of the evacuation chamber.

7. The separation and purification device according to claim 5, wherein, The baffle plates are arranged on the opposite side walls of the evacuation chamber.

8. The separation and purification device according to claim 1, wherein, The gas extraction system includes a vacuum pump, and the vacuum pump is connected to the upper part of the evacuation chamber through a gas extraction pipeline, and an evacuation valve is arranged on the gas extraction pipeline.

9. The separation and purification device according to claim 8, characterized in that, The number of the evacuation valves is two, and the directions of the two evacuation valves are opposite.

10. The separation and purification device according to claim 4, characterized in that, It also includes a first refrigerant pipeline and a third refrigerant pipeline connected between the refrigeration assembly and the evacuation chamber. One end of the first refrigerant pipeline is connected to the intake interface at the lower part of the evacuation chamber, and the other end is connected to the upper part of the refrigeration assembly; one end of the third refrigerant pipeline is connected to the liquid return interface at the lower part of the evacuation chamber, and the other end is connected to the middle part of the refrigeration assembly.

11. The separation and purification device according to claim 10, characterized in that, An intake valve is arranged on the first refrigerant pipeline; and / or, a liquid return valve is arranged on the third refrigerant pipeline.

12. The separation and purification device according to claim 11, wherein, The liquid return valve and the liquid level switch are in linkage control.

13. The separation and purification device according to claim 10, characterized in that, The intake interface is located above the liquid return interface in the vertical direction.

14. The separation and purification device according to claim 10, wherein, The first refrigerant pipeline is connected between 2 / 3 and 3 / 4 of the height of the refrigeration assembly.

15. The separation and purification device according to claim 10, wherein The third refrigerant pipeline is connected between 1 / 3 and 1 / 2 of the height of the refrigeration assembly.

16. A refrigeration component, characterized in that, including the separation and purification device according to any one of claims 1-15.

17. The refrigeration assembly according to claim 16, wherein, The refrigeration assembly is a condenser.

18. A refrigeration system, characterized in that, including the refrigeration assembly according to any one of claims 16-17.

19. The refrigeration system according to claim 18, characterized in that, The refrigeration system is a chiller.

20. A purification method, characterized in that, A method for purifying a refrigerant by using the separation and purification device according to any one of claims 1-15, including when the refrigerant separation and purification conditions are met, the mixed gas starts to be conveyed into the evacuation chamber, and the separation and purification device receives a start signal and starts to carry out the purification and separation of the mixed gas; obtaining the suction temperature value Ttcx1 of the purification compressor in the refrigeration subsystem; Compare the suction temperature value Ttcx1 of the purification compressor with the target suction temperature value Ttcs of the purification compressor to obtain a comparison result; Perform subsequent preset processing according to the comparison result.

21. The purification method according to claim 20, characterized in that, According to the comparison result, the subsequent preset processing includes S1. Shut down the separation and purification device. When the refrigerant separation and purification conditions are met again, the separation and purification device is restarted, and this cycle is repeated to obtain and compare the temperature again; Or S2. Stop the delivery of the mixed gas, send the separated refrigerant back to the condenser. When the extraction system receives a start signal, it extracts the non-condensable gas separated out. After a set time Tcx2, the extraction system receives a shutdown signal and stops extraction, and this cycle is repeated to obtain and compare the temperature again.

22. The purification method according to claim 21, wherein, The comparison result includes A1. The suction temperature value Ttcx1 of the purification compressor > the target suction temperature value Ttcs of the purification compressor, and it lasts for a set time Tcx1; Or A2. The suction temperature value Ttcx1 of the purification compressor ≤ the target suction temperature value Ttcs of the purification compressor; When the comparison result is A1, perform the S1 process; when the comparison result is A2, perform the S2 process.

23. The purification method according to claim 20, characterized in that, The range of the target suction temperature value Ttcs of the purification compressor is 0 to -20 °C.

24. A storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the purification method according to any one of claims 20 to 23.

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