Refrigerant recovery system and control method

Abstract

The invention belongs to the technical field of air conditioners, and discloses a refrigerant recovery system and a control method. The refrigerant recovery system comprises a refrigerant leading-out pipeline used for being connected with refrigeration equipment to be recovered, a first flow path and a second flow path, the first flow path and the second flow path are connected to the outlet end of the refrigerant leading-out pipeline in parallel, and the first flow path and the second flow path are arranged in the mode that a first valve is opened, and a second valve is closed; the detection assembly can detect the saturation pressure value of the refrigerant flowing into the first flow path, the refrigerant recovery system is in a recovery mode, the first valve is closed, the second valve is opened, and the recovery assembly can recover the refrigerant flowing into the second flow path. According to the refrigerant recycling device, the first flow path and the second flow path are connected in parallel, so that the types and the purity of refrigerants can be quickly and simply identified and recycled in the recycling process, refrigerants with extremely low purity or refrigerants with different types are prevented from being recycled into the same storage tank, the purity of the refrigerants to be recycled is improved, and the recycling efficiency of the refrigerants is improved. And the recovery efficiency of the refrigerant is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerant recovery, and in particular to a refrigerant recovery system and a control method. Background Art

[0002] At present, in the relevant technologies of refrigerant recycling, refrigerants can be recycled through recycling equipment such as portable recycling machines, recycling purifiers, and recycling filling machines. However, in the process of recycling refrigerants, there are usually multiple refrigerants. The relevant recycling equipment can easily recycle refrigerants of extremely low purity or different types into the same storage tank, thereby increasing the difficulty of disposing of the recovered refrigerants and reducing the recycling efficiency of the recycling equipment for the refrigerants.

[0003] Portable refrigerant identification devices, such as refrigerant recovery devices, are basically based on the principle of non-dispersive infrared spectroscopy to identify refrigerants. Since portable refrigerant identification devices are complex in principle, expensive, and can only identify a limited number of refrigerants, they cannot quickly and easily identify and recover multiple types of refrigerants during the recycling process. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing recovery equipment is unable to quickly and easily identify and recover multiple types of refrigerants. For this purpose, a refrigerant recovery system and a control method are provided.

[0005] The present invention aims to provide a refrigerant recovery system, comprising:

[0006] A refrigerant outlet pipeline for connection with the refrigeration equipment to be recovered;

[0007] A first flow path and a second flow path connected in parallel to an outlet end of a refrigerant outlet pipe;

[0008] A first flow path, the first flow path includes a detection component and a first valve, the detection component is arranged downstream of the first valve, and is used to detect the saturation pressure value of the refrigerant flowing into the first flow path;

[0009] a second flow path, the second flow path comprising a recovery component and a second valve, the recovery component being disposed downstream of the second valve and used for recovering the refrigerant flowing into the second flow path;

[0010] The refrigerant recovery system is in a detection mode, the first flow path and the second flow path are set to have the first valve open and the second valve closed, and the detection component can detect the saturation pressure value of the refrigerant flowing into the first flow path;

[0011] The refrigerant recovery system is in a recovery mode, the first valve is closed, the second valve is opened, and the recovery component can recover the refrigerant flowing into the second flow path.

[0012] In some embodiments, the detection component includes:

[0013] A temperature control room, wherein a first chamber is provided in the temperature control room, and a temperature control component and a detection chamber are provided in the first chamber;

[0014] Among them, the temperature control component is used to keep the temperature value in the temperature control room constant;

[0015] The detection chamber forms a second chamber which is communicated with the first flow path. The detection chamber is provided with a sensor group which includes a temperature sensor and a pressure sensor for detecting the temperature value and the pressure value of the refrigerant in the detection chamber.

[0016] In some embodiments, the detection chamber comprises:

[0017] A controller, wherein the temperature sensor and the pressure sensor are electrically connected to the controller respectively;

[0018] The controller is configured to: when the temperature value detected by the temperature sensor reaches a preset temperature value, control the pressure sensor to detect the saturation pressure value of the refrigerant in the second chamber.

[0019] In some embodiments, the temperature control assembly includes a heating element and a first fan;

[0020] The detection chamber is arranged at a side away from the first valve.

[0021] In some embodiments, the recovery component includes:

[0022] The transmission part and the accommodating part are provided downstream of the transmission part, and the transmission part can transport the refrigerant to the accommodating part.

[0023] In some embodiments, the transmission unit includes:

[0024] A compressor and a condenser, wherein the condenser is arranged downstream of the compressor;

[0025] The second fan is used to cool the condenser.

[0026] In some embodiments, the receiving portion includes:

[0027] A third valve, the third valve is arranged downstream of the condenser;

[0028] A storage tank, which is located downstream of the third valve;

[0029] Among them, the third valve is a one-way valve.

[0030] In some embodiments, the refrigerant recovery system further comprises:

[0031] A purification component is arranged on the refrigerant outlet pipeline.

[0032] In some embodiments, a control method is provided for controlling the refrigerant recovery system of the above technical solution, the control method comprising:

[0033] Control the first valve to open the first flow path, and control the second valve to block the second flow path;

[0034] Controlling the detection component to obtain the saturation pressure value of the refrigerant;

[0035] Determine whether the deviation range between the saturation pressure value of the refrigerant and the preset saturation pressure value is greater than the preset deviation range;

[0036] If so, it is determined that the refrigerant does not meet the type requirement of the target refrigerant and / or does not meet the purity requirement of the target refrigerant, and the first valve is controlled to block the first flow path, and the detection and recovery of the refrigerant are stopped;

[0037] If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve to block the first flow path, control the second valve to open the second flow path, control the refrigerant to flow into the second flow path, and control the recovery component to recover the refrigerant.

[0038] In some embodiments, a control method is provided for controlling the refrigerant recovery system of the above technical solution, the control method comprising:

[0039] Control refrigerant through purification components;

[0040] Control the first valve to open the first flow path, and control the second valve to block the second flow path;

[0041] Control the temperature control component to increase the temperature of the testing room;

[0042] Controlling the sensor group to work and obtain the refrigerant temperature value in the second chamber;

[0043] Determining whether the temperature value of the refrigerant in the second chamber is equal to a preset temperature value;

[0044] If not, it is determined that the refrigerant has not reached the condition for detecting the saturation pressure value, and the sensor group repeatedly obtains the refrigerant temperature value in the second chamber;

[0045] If so, it is determined that the refrigerant has reached a condition for detecting a saturation pressure value, and the sensor group is controlled to obtain a saturation pressure value of the refrigerant in the second chamber;

[0046] The temperature control component stops working;

[0047] Determining whether an initial deviation range between a saturation pressure value of the refrigerant in the second chamber and a preset saturation pressure value is greater than a preset deviation range;

[0048] If so, it is determined that the refrigerant does not meet the type requirement of the target refrigerant and / or does not meet the purity requirement of the target refrigerant, and the first valve is controlled to block the first flow path, and the detection and recovery of the refrigerant are stopped;

[0049] If not, it is determined that the refrigerant meets the type requirement and / or the purity requirement of the target refrigerant, the first valve is controlled to block the first flow path, the second valve is controlled to open the second flow path, and the transmission unit is controlled to transport the refrigerant to the accommodating unit.

[0050] In some embodiments, the preset temperature value is 40° C., and the preset deviation range is 5%.

[0051] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0052] By connecting the first flow path and the second flow path in parallel, the refrigerant recovery system can determine whether the refrigerant to be recovered is the target refrigerant by detecting the saturation pressure value of the refrigerant to be recovered before recovering the refrigerant, so as to avoid recycling the refrigerant that does not meet the requirements, thereby realizing the operation of quickly and easily identifying and recovering multiple types of refrigerants during the recovery process, avoiding recycling refrigerants of extremely low purity or different types into the same storage tank, reducing the difficulty of handling the recovered refrigerant, and improving the recovery efficiency of the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0054] Figure 1 is a schematic diagram of a flow path of a refrigerant recovery system shown in an embodiment of the present invention;

[0055] Figure 2 is one of the flow charts of the control method shown in the embodiment of the present invention;

[0056] Figure 3 This is the second flow chart of the control method shown in the embodiment of the present invention;

[0057] Figure 4 This is the third flow chart of the control method shown in the embodiment of the present invention.

[0058] In the figure: 10-refrigerant recovery system, 100-first flow path, 110-detection component, 112-temperature control chamber, 114-temperature control component, 116-heating element, 118-first fan, 120-detection chamber, 122-second chamber, 126-sensor, 128-temperature sensor, 130-pressure sensor, 140-first valve, 142-controller, 200-second flow path, 210-recovery component, 212-transmission part, 214-compressor, 216-condenser, 218-second fan, 220-accommodation part, 222-third valve, 224-storage tank, 240-second valve, 300-purification component, 310-filter part, 312-filter outlet, 400-refrigerant outlet pipeline.

[0059] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0060] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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 cannot be understood as a limitation on the present invention.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "contacted", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the relevant technologies for refrigerant recovery, the recovery equipment is unable to quickly and easily identify and recover multiple types of refrigerants during the recovery process, which makes it easy for the recovery equipment to recycle refrigerants of extremely low purity or different types into the same storage tank, thereby increasing the difficulty of disposing of the recovered refrigerants and reducing the recovery efficiency of the recovery equipment for the refrigerants.

[0063] Based on this technical problem, the following embodiments are proposed.

[0064] Embodiment 1

[0065] like Figure 1 As shown, a refrigerant recovery system 10 is characterized by comprising:

[0066] A refrigerant outlet pipeline 400 for connecting to the refrigeration equipment to be recovered;

[0067] A first flow path 100 and a second flow path 200 connected in parallel to an outlet end of the refrigerant outlet pipe 400;

[0068] A first flow path 100, wherein the first flow path 100 comprises a detection component 110 and a first valve 140, wherein the detection component 110 is disposed downstream of the first valve 140 and is used to detect a saturation pressure value of the refrigerant flowing into the first flow path 100;

[0069] A second flow path 200, wherein the second flow path 200 comprises a recovery component 210 and a second valve 240, wherein the recovery component 210 is disposed downstream of the second valve 240 and is used to recover the refrigerant flowing into the second flow path 200;

[0070] The refrigerant recovery system is in a detection mode, the first flow path 100 and the second flow path 200 are set such that the first valve 140 is open and the second valve 240 is closed, and the detection component 110 is capable of detecting the saturation pressure value of the refrigerant flowing into the first flow path 100;

[0071] The refrigerant recovery system is in a recovery mode, the first valve 140 is closed, the second valve 240 is opened, and the recovery component 210 can recover the refrigerant flowing into the second flow path 200 .

[0072] In this embodiment, if Figure 1As shown, the refrigerant recovery system 10 includes a refrigerant outlet pipe 400, a first flow path 100 and a second flow path 200 for connecting to the refrigeration equipment to be recovered. After the refrigerant recovery system 10 is connected to the refrigeration equipment to be recovered, the refrigerant in the refrigeration equipment to be recovered can flow into the refrigerant recovery system 10 through the refrigerant outlet pipe 400, and flow in the first flow path 100 and the second flow path 200 respectively. The first flow path 100 includes a detection component 110 and a first valve 140. The detection component 110 is arranged downstream of the first valve 140. The refrigerant needs to flow through the first valve 140 before entering the detection component 110. The second flow path 200 includes a recovery component 210 and a second valve 240. The recovery component 210 is arranged downstream of the second valve 240. The refrigerant needs to flow through the second valve 240 before entering the recovery component 210. By connecting the first flow path 100 and the second flow path 200 in parallel, the refrigerant can flow only in the first flow path 100, only in the second flow path 200, or simultaneously in the first flow path 100 and the second flow path 200. When the refrigerant to be recovered is recovered, the refrigerant needs to be tested first to determine whether the type and purity of the refrigerant to be recovered meet the recovery requirements of the target refrigerant. If it is confirmed after the test that the type and purity of the refrigerant to be recovered meet the recovery requirements of the target refrigerant, the refrigerant to be recovered begins to be recovered. In the detection mode, the first flow path 100 and the second flow path 200 are set to: open the first valve 140 and close the second valve 240 at the same time. At this time, the refrigerant flows into the first flow path 100 through the first valve 140, and is blocked by the second valve 240 outside the second flow path 200, so as to prevent the undetected refrigerant from being directly recovered by the second flow path 200.

[0073] After the refrigerant flows into the detection component 110, the detection component 110 can detect the saturation pressure value of the refrigerant flowing into it. When the initial deviation between the saturation pressure value of the refrigerant and the preset saturation pressure value is greater than the preset deviation range, it means that the purity of the refrigerant to be recovered is low, or it is different from the type of the target refrigerant to be recovered, so the recovery operation can be ended directly.

[0074] When the initial deviation range between the saturated pressure value of the refrigerant and the preset saturated pressure value is within the preset deviation range, it means that the type and purity of the refrigerant to be recovered meet the recovery requirements of the target refrigerant, and the recovery mode begins. At this time, the first flow path 100 and the second flow path 200 are set as follows: the second valve 240 is opened, so that the refrigerant can flow into the second flow path 200 through the second valve 240, and the recovery component 210 recovers and stores the refrigerant.

[0075] By connecting the first flow path 100 and the second flow path 200 in parallel, the refrigerant recovery system 10 can determine the type and purity of the refrigerant to be recovered by detecting the saturated pressure value of the refrigerant to be recovered before recovering the refrigerant, so as to avoid recycling the refrigerant that does not meet the requirements, thereby realizing the operation of quickly and easily identifying and recovering the type and purity of the refrigerant during the recovery process, avoiding recycling refrigerants of extremely low purity or different types into the same storage tank, so as to improve the purity of the refrigerant to be recovered, reduce the difficulty of handling the recovered refrigerant, and improve the recovery efficiency of the refrigerant.

[0076] Preferably, in the recovery mode, the first valve 140 can also be closed to avoid pressure drop due to diversion after the refrigerant flows into the refrigerant recovery system 10, so that the refrigerant can maintain a stable state in the recovery mode, further improving the recovery efficiency.

[0077] Preferably, the refrigerant to be recovered flows into the first flow path 100 and / or the second flow path 200 in a liquid state.

[0078] Preferably, the refrigerant recovery system 10 can identify and process the following types of refrigerants: R22, R32, R410A, R134a, R290, R600a, etc.

[0079] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the detection component 110 includes:

[0080] A temperature control chamber 112, wherein a first chamber is provided in the temperature control chamber 112, wherein a temperature control component 114 and a detection chamber 120 are provided in the first chamber;

[0081] The temperature control component 114 is used to keep the temperature value in the temperature control chamber 112 constant;

[0082] The detection chamber 120 is formed with a second chamber 122 , which is communicated with the first flow path. The detection chamber 120 is provided with a sensor group 126 , which includes a temperature sensor 128 and a pressure sensor 130 for detecting the temperature value and pressure value of the refrigerant in the detection chamber 120 .

[0083] In this embodiment, if Figure 1As shown, the detection component 110 includes a temperature control chamber 112, and the temperature control chamber 112 is provided with a first chamber, and a temperature control component 114 and a detection chamber 120 are respectively arranged in the first chamber. When the refrigerant flows into the detection component 110, it first flows into the first chamber through the temperature control chamber 112, and then enters the detection chamber 120. The temperature control component 114 can control the temperature value in the first chamber, and then adjust the temperature value in the detection chamber 120 by heat exchange, so that the temperature value in the detection chamber 120 can be basically kept constant to maintain within the temperature value range required by the detection condition. The detection chamber 120 includes a second chamber 122 and a sensor group 126, and the sensor group 126 is arranged in the second chamber 122. In the detection mode, the refrigerant will flow into the second chamber 122 and contact with the sensor group 126. The sensor group 126 includes a temperature sensor 128 and a pressure sensor 130. In the detection mode, the temperature sensor 128 and the pressure sensor 130 are in contact with the refrigerant, thereby obtaining the temperature value data and the saturated pressure value data of the refrigerant.

[0084] By setting up the temperature control chamber 112 and setting the temperature sensor 128 and the pressure sensor 130 in the sensor group 126, the detection chamber 120 can detect the saturated pressure value of the refrigerant within the temperature value range required by the detection conditions, thereby making the detection result more accurate and avoiding misjudgment.

[0085] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the detection chamber 120 includes:

[0086] A controller 142, wherein the temperature sensor 128 and the pressure sensor 130 are electrically connected to the controller 142 respectively;

[0087] The controller 142 is configured to control the pressure sensor 130 to detect a saturated pressure value of the refrigerant in the second chamber 122 when the temperature value detected by the temperature sensor 128 reaches a preset temperature value.

[0088] In this embodiment, if Figure 1 As shown, the detection chamber 120 also includes a controller 142 , and the temperature sensor 128 and the pressure sensor 130 are electrically connected to the controller 142 respectively, so that the temperature sensor 128 and the pressure sensor 130 can both transmit signals to the controller 142 and receive signals sent by the controller 142 .

[0089] The preset program in the controller 142 is set as follows: when the temperature sensor 128 detects that the refrigerant in the second chamber 122 has reached a preset temperature value, a data signal is transmitted to the controller 142. After receiving the data signal from the temperature sensor 128, the controller 142 sends a detection instruction to the pressure sensor 130. After receiving the detection instruction from the controller, the pressure sensor 130 detects the saturated pressure value of the refrigerant in the second chamber 122.

[0090] When the pressure sensor 130 detects that the saturated pressure value of the refrigerant in the second chamber 122 at the preset temperature value is greater than the preset deviation range from the preset saturated pressure value, it is considered that the purity of the refrigerant is low, or it is different from the type of the target refrigerant to be recovered, and its recovery can be stopped at this time.

[0091] When the pressure sensor 130 detects that the saturated pressure value of the refrigerant in the second chamber 122 at the preset temperature value is within the preset deviation range from the initial deviation range of the preset saturated pressure value, it means that the refrigerant to be recovered is the target refrigerant that needs to be recovered, and the recovery mode can be entered at this time.

[0092] By electrically connecting the temperature sensor 128 and the pressure sensor 130 to the controller 142, the pressure sensor 130 can detect the saturation pressure value of the refrigerant after the refrigerant reaches the preset temperature value, so as to prevent the pressure sensor 130 from detecting the saturation pressure value of the refrigerant before the preset temperature value is reached, thereby further reducing the risk of misjudgment in the detection mode.

[0093] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the temperature control assembly includes a heating element 116 and a first fan 118;

[0094] The detection chamber 120 is disposed at a side away from the first valve 140 .

[0095] In this embodiment, if Figure 1As shown, the temperature control assembly 114 includes a heating element 116 and a first fan 118. The heating element 116 is arranged on the side of the detection chamber 120 away from the first valve 140, which can shorten the circulation distance of the refrigerant and enable the refrigerant to enter the detection chamber 120 more quickly. The side of the detection chamber 120 away from the first valve 140 is A. The first fan 118 can be arranged on the side of the heating element 116 away from the detection chamber 120 to heat the detection chamber 120. The side of the heating element 116 away from the detection chamber 120 is B. The first fan 118 can be arranged in a direction toward the heating element 116, so that the airflow blown by the first fan 118 can pass through the heating element 116 and finally blow toward the detection chamber 120 to heat it. The direction toward the heating element 116 is direction C. When the temperature value of the detection chamber 120 does not meet the detection conditions, the heating element 116 starts to heat up the temperature control chamber 112, and at the same time the first fan 118 is turned on to blow the hot air flow generated around the heating element 116 toward the detection chamber 120, so that the detection chamber 120 can quickly reach the preset temperature value that meets the detection conditions and complete the detection of the saturated pressure value of the refrigerant at the preset temperature value.

[0096] Preferably, the temperature control component 114 can use a PID adjustment algorithm (PID, Proportiona l-Integral-Derivat) to control the temperature value of the detection chamber 120. The comparison temperature value set by the temperature control component 114 is generally higher than the room temperature and can be 40°C. When the temperature value of the temperature control component 114 deviates from the set comparison temperature value by more than 1°C, the heating power of the heating element 116 and the wind speed of the first fan 118 can be adjusted to finally make the temperature value of the temperature control component 114 deviate from the set comparison temperature value within 1°C. At this time, it is considered that a stable state is reached, and the saturated pressure value of the refrigerant can be detected.

[0097] By setting up the temperature control component 114, the temperature control component 114 can adjust the temperature value of the detection chamber 120, so that the refrigerant in the detection chamber 120 can reach the preset temperature value more quickly, so that the detection chamber 120 can detect the saturation pressure value of the refrigerant, thereby further improving the operating efficiency of the refrigerant recovery system 10.

[0098] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the recovery component 210 includes: a transmission portion 212 and a receiving portion 220 . The receiving portion 220 is disposed downstream of the transmission portion 212 . The transmission portion 212 can transport the refrigerant to the receiving portion 220 .

[0099] In this embodiment, Figure 1As shown, the recovery component 210 includes a transmission part 212 and a receiving part 220. The transmission part 212 is arranged downstream of the second valve 240, and the refrigerant flows into the transmission part 212 after flowing through the second valve 240. The transmission part 212 can provide power for the circulation of the refrigerant. The receiving part 220 is arranged downstream of the transmission part 212. After the refrigerant flows through the transmission part 212, it is transported to the receiving part 220 by the transmission part 212, and the receiving part 220 can store the recovered refrigerant. In the recovery mode, after the refrigerant flows into the recovery component 210, it first flows through the transmission part 212. The transmission part 212 provides power to the refrigerant, so that the refrigerant continues to flow downstream, and finally flows into the receiving part 220 for storage. In the recovery mode, the refrigerant recovery system 10 can quickly recover and store the refrigerant under the power provided by the transmission part 212. Compared with other non-powered recovery methods, the transmission unit 212 can increase the recovery speed of the refrigerant by the refrigerant recovery system 10, thereby further improving the recovery efficiency of the refrigerant by the refrigerant recovery system 10.

[0100] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the transmission unit 212 includes: a compressor 214 and a condenser 216, wherein the condenser 216 is disposed downstream of the compressor 214;

[0101] The second fan 218 is used to cool the condenser 216 .

[0102] In this embodiment, if Figure 1 As shown, the transmission part 212 includes a compressor 214, a condenser 216 and a second fan 218. The compressor 214 is connected to the downstream of the second valve 240. When the refrigerant flows through the second valve 240 and flows into the compressor 214, the compressor 214 compresses the refrigerant, changes the refrigerant into a high-temperature and high-pressure vapor state, and pushes the refrigerant to continue to move downstream. The condenser 216 is connected to the downstream of the compressor 214. When the high-temperature and high-pressure refrigerant vapor flows from the compressor 214 into the condenser 216, the second fan 218 located on the side of the heat exchange surface of the condenser 216 blows toward the condenser 216 to cool the condenser 216. At this time, the refrigerant in the condenser 216 is cooled and becomes a high-pressure liquid state after being cooled and continues to flow to the accommodating part 220. Since the unit volume of the refrigerant in the liquid state is smaller than that of the refrigerant in the gas state, the refrigerant flowing into the accommodating part 220 in the liquid state can make the accommodating part 220 store more units of refrigerant, thereby further improving the refrigerant recovery efficiency of the refrigerant recovery system 10.

[0103] Specifically, the compressor 214 may be an oil-free compressor 214 or an oil-containing compressor 214 .

[0104] Specifically, Figure 1 As shown, one side of the heat exchange surface of the condenser 216 is D.

[0105] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the accommodating portion 220 includes:

[0106] A third valve 222, the third valve 222 is disposed downstream of the condenser 216;

[0107] A storage tank 224, which is disposed downstream of the third valve 222;

[0108] The third valve 222 is a one-way valve.

[0109] In this embodiment, if Figure 1 As shown, the accommodating portion 220 includes a third valve 222 and a storage tank 224. The third valve 222 is arranged downstream of the condenser 216, and the refrigerant flows to the third valve 222 after flowing out of the transmission portion 212. The storage tank 224 is arranged downstream of the third valve 222, and the refrigerant flows into the storage tank 224 after passing through the third valve 222, thereby completing the recovery of the refrigerant. By setting the third valve 222 as a one-way valve, the refrigerant can only continue to flow to the storage tank 224 after flowing through the third valve 222 and cannot flow to the second valve 240, thereby avoiding the risk of the refrigerant flowing back from the storage tank 224 to the second valve 240 when a sudden power failure or other failures cause negative pressure to be generated in the second flow path 200.

[0110] Specifically, the third valve 222 may be a ball check valve, a swing check valve, a rubber flap check valve, or the like.

[0111] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the refrigerant recovery system 10 also includes:

[0112] The purification component 300 is disposed on the refrigerant outlet pipe 400 .

[0113] In this embodiment, if Figure 1 As shown, the refrigerant recovery system 10 further includes a purification component 300, which is used to filter impurities in the refrigerant. The purification component 300 is arranged in the refrigerant outlet pipeline 400, so that the purification component 300 is upstream of the parallel end of the first flow path 100 and the second flow path 200. When the refrigerant recovery system 10 is in operation, the refrigerant to be recovered needs to first flow into the purification component 300 for filtration, and then be controlled to flow into the first flow path 100 and / or the second flow path 200 respectively.

[0114] By providing the purification component 300, impurities in the refrigerant flowing into the first flow path 100 and / or the second flow path 200 are reduced, which can not only reduce the risk of failure of each component in the detection component 110 and the recovery component 210, but also improve the purity of the refrigerant during the recovery process, thereby further improving the recovery efficiency of the refrigerant recovery system 10.

[0115] Optionally, in an implementation of this embodiment, as Figure 1 As shown, the purification assembly 300 includes:

[0116] The filter unit 310 is provided with a filter outlet 312 .

[0117] In this embodiment, if Figure 1 As shown, the purification component 300 includes a filter part 310, and a filter outlet 312 is provided on the filter part 310. The refrigerant after filtering flows to the first flow path 100 and / or the second flow path 200 from the filter outlet 312. Since the first flow path 100 and the second flow path 200 are connected in parallel, the first valve 140 and the second valve 240 are controlled respectively, so that after the refrigerant flows out from the filter outlet 312, it can flow into the first flow path 100 only from the first valve 140, or flow into the second flow path 200 only from the second valve 240, or flow into the first flow path 100 and the second flow path 200 from the first valve 140 and the second valve 240 at the same time, so as to meet the needs of the refrigerant recovery system 10 in different modes.

[0118] Specifically, the filter unit 310 can be composed of filters with different filtering functions such as oil removal filter, water removal filter, acid removal filter and solid particle impurity filter, which are connected in series to meet the purification needs of refrigerant containing different unknown impurities.

[0119] Embodiment 2

[0120] This embodiment provides a control method, such as Figure 2 As shown, for controlling the refrigerant recovery system in the first embodiment, the control method includes:

[0121] Controlling the first valve 140 to open the first flow path 100, and controlling the second valve 240 to block the second flow path 200;

[0122] Controlling the detection component 110 to obtain the saturation pressure value of the refrigerant;

[0123] Determine whether the deviation range between the saturation pressure value of the refrigerant and the preset saturation pressure value is greater than the preset deviation range;

[0124] If yes, it is determined that the refrigerant does not meet the target refrigerant type requirement and / or the target refrigerant purity requirement, the first valve 140 is controlled to block the first flow path 100, and the detection and recovery of the refrigerant are stopped;

[0125] If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve 140 to block the first flow path 100, control the second valve 240 to open the second flow path 200, control the refrigerant to flow into the second flow path 200, and control the recovery component 210 to recover the refrigerant.

[0126] In this embodiment, if Figure 2 As shown, the control method is used to control the refrigerant recovery system in Example 1. The control method opens the first flow path by controlling the first valve 140 to open before recovery, and blocks the second flow path by controlling the second valve 240 to close, so that the refrigerant can first flow into the first flow path for detection in the detection mode, thereby preventing the refrigerant from entering the second flow path and being directly recovered without detection. When the refrigerant flows into the detection component in the first flow path, the detection component obtains the saturation pressure value of the refrigerant through detection, and determines whether the deviation range between the obtained saturation pressure value of the refrigerant and the preset saturation pressure value is greater than the preset deviation range, so as to proceed to the next step. When the deviation range between the obtained saturated pressure value of the refrigerant and the preset saturated pressure value is greater than the preset deviation range, it means that the current refrigerant does not meet the type requirement of the target refrigerant or the purity requirement of the target refrigerant, or both the type and purity requirements are not met, and it is not suitable for recycling. At this time, the first valve 140 is controlled to be closed, the first flow path is blocked to prevent the refrigerant from continuing to flow into the first flow path, and the refrigerant recovery operation is stopped, such as directing the refrigerant to other storage spaces to be disposed of. When the deviation range between the obtained saturated pressure value of the refrigerant and the preset saturated pressure value is less than the preset deviation range, it means that the current refrigerant meets the type requirement of the target refrigerant and also meets the purity requirement of the target refrigerant, and can be recycled. At this time, the first valve 140 is controlled to be closed, the first flow path is blocked to prevent the refrigerant from continuing to flow into the first flow path, and the second valve 240 is controlled to be opened to open the second flow path so that the refrigerant can flow into the second flow path, and the refrigerant is recovered and stored using the recovery component 210.

[0127] Specifically, Figure 2 As shown, the control method includes:

[0128] Step 202: Control the first valve 140 to open the first flow path 100, and control the second valve 240 to block the second flow path 200;

[0129] Step 204: controlling the detection component 110 to obtain the saturation pressure value of the refrigerant;

[0130] Step 206: Determine whether the deviation range between the saturated pressure value of the refrigerant and the preset saturated pressure value is greater than the preset deviation range;

[0131] Step 208: If yes, it is determined that the refrigerant does not meet the type requirement of the target refrigerant and / or does not meet the purity requirement of the target refrigerant, and the first valve 140 is controlled to block the first flow path 100, and the detection and recovery of the refrigerant are stopped;

[0132] Step 210: If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve 140 to block the first flow path 100, control the second valve 240 to open the second flow path 200, control the refrigerant to flow into the second flow path 200, and control the recovery component 210 to recover the refrigerant.

[0133] This embodiment also provides a control method, such as Figure 3 As shown, for controlling the refrigerant recovery system in the first embodiment, the control method includes:

[0134] Controlling the refrigerant to pass through the purification component 300;

[0135] Controlling the first valve 140 to open the first flow path 100, and controlling the second valve 240 to block the second flow path 200;

[0136] Controlling the temperature control component 114 to work and increase the temperature of the detection chamber 120;

[0137] Controlling the sensor group 126 to work, and obtaining the refrigerant temperature value in the second chamber 122;

[0138] Determining whether the temperature value of the refrigerant in the second chamber 122 is equal to a preset temperature value;

[0139] If not, it is determined that the refrigerant has not reached the condition for detecting the saturation pressure value, and the sensor group 126 repeatedly obtains the refrigerant temperature value in the second chamber 122;

[0140] If so, it is determined that the refrigerant has reached the condition for detecting the saturation pressure value, and the sensor group 126 is controlled to obtain the saturation pressure value of the refrigerant in the second chamber 122;

[0141] Controlling the temperature control component 114 to stop working;

[0142] Determine whether an initial deviation range between a saturation pressure value of the refrigerant in the second chamber 122 and a preset saturation pressure value is greater than a preset deviation range;

[0143] If yes, it is determined that the refrigerant does not meet the type requirement of the target refrigerant and / or does not meet the purity requirement of the target refrigerant, and the first valve 140 is controlled to block the first flow path 100, and the detection and recovery of the refrigerant are stopped;

[0144] If not, it is determined that the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, the first valve 140 is controlled to block the first flow path 100, the second valve 240 is controlled to open the second flow path 200, and the transmission part 212 is controlled to work to transport the refrigerant to the accommodating part 220.

[0145] In this embodiment, if Figure 3As shown, the control method is used to control the refrigerant recovery system 10 in the first embodiment. The control method can reduce the risk of failure of each component in the detection component 110 and the recovery component 210 and improve the purity of the refrigerant during the recovery process by controlling the refrigerant to pass through the purification component 300 before recovery to filter out various impurities in the refrigerant. Then open the first valve 140 and close the second valve 240 at the same time, so that the refrigerant can first flow into the first flow path 100 for detection in the detection mode, thereby preventing the refrigerant from entering the second flow path 200 and being directly recovered without detection. Then turn on the temperature control component 114, and the heating element 116 located in the temperature control component 114 can heat the temperature control chamber 112. At the same time, turn on the first fan 118, and the heating element 116 can heat the temperature control chamber 112. The first fan 118 blows the generated hot air flow to the detection chamber 120 to heat the detection chamber 120. At this time, the temperature sensor 128 in the sensor group 126 in the detection chamber 120 is started, and repeatedly obtains the temperature value of the refrigerant in the second chamber 122. When the temperature value of the refrigerant in the second chamber 122 obtained by the temperature sensor 128 is greater than or less than the preset temperature value required by the detection condition, it means that the refrigerant in the second chamber 122 has not yet reached the condition for detecting the saturated pressure value. At this time, the heating power of the heating element 116 in the temperature control component 114 or the wind speed of the first fan 118 can be adjusted, or the heating power of the heating element 116 or the wind speed of the first fan 118 can be adjusted at the same time, so that the refrigerant in the second chamber 122 can reach the preset temperature value faster. When the refrigerant temperature value in the second chamber 122 obtained by the temperature sensor 128 is equal to the preset temperature value required by the detection condition, it means that the refrigerant in the second chamber 122 has reached the condition for detecting the saturated pressure value. At this time, the controller 142 sends a signal to the pressure sensor 130 to control the pressure sensor 130 to obtain the saturated pressure value of the refrigerant in the second chamber 122, and then controls the temperature control component 114 to stop heating, and the detection component 110 stops working at this time. When the initial deviation range between the saturated pressure value of the refrigerant in the second chamber 122 obtained and the preset saturated pressure value is greater than the preset deviation range, it means that the refrigerant does not meet the target refrigerant type requirement or the target refrigerant purity requirement, or both, and is not suitable for recovery. At this time, the first valve 140 is closed to prevent the refrigerant from continuing to flow into the first flow path 100, and the recovery operation of the refrigerant is stopped, for example, the refrigerant is directed to other storage spaces to be disposed of. When the initial deviation range between the saturated pressure value of the refrigerant in the second chamber 122 and the preset saturated pressure value is greater than the preset deviation range, it means that the refrigerant meets the type requirement of the target refrigerant or the purity requirement of the target refrigerant and can be recovered. At this time, the first valve 140 is closed to prevent the refrigerant from continuing to flow into the first flow path 100, and the recovery operation of the refrigerant is stopped, for example, the refrigerant is directed to other storage spaces to be disposed of.When the initial deviation range between the saturated pressure value of the refrigerant in the second chamber 122 and the preset saturated pressure value is less than the preset deviation range, it means that the refrigerant meets the recovery condition. At this time, the first valve 140 is closed to prevent the refrigerant from continuing to flow into the detection component 110 and thus affecting the pressure drop of the refrigerant in the second flow path. At the same time, the second valve is opened to allow the refrigerant to flow into the recovery component 210 and be recovered. Then, the compressor 214 located in the transmission part 212 is turned on, and the refrigerant flowing into the transmission part 212 is compressed to change the refrigerant into a high-temperature and high-pressure gas state, and the refrigerant is pushed into the condenser 216 located downstream. At this time, the second fan 218 is turned on, and the second fan 218 located on the heat exchange surface side of the condenser 216 blows toward the condenser 216 to cool the condenser 216. At this time, the refrigerant in the condenser 216 becomes a high-pressure liquid state after cooling and continues to flow to the accommodating part 220. At this time, the third valve 222 is opened so that the refrigerant can enter the storage tank 224, and the recovery operation of the refrigerant is now completed.

[0146] Specifically, Figure 3 As shown, the control method includes:

[0147] Step 302: Control the refrigerant to pass through the purification component 300;

[0148] Step 304: Control the first valve 140 to open the first flow path 100, and control the second valve 240 to block the second flow path 200;

[0149] Step 306: Control the temperature control component 114 to work and increase the temperature of the detection chamber 120;

[0150] Step 308: Control the sensor group 126 to work, and obtain the refrigerant temperature value in the second chamber 122;

[0151] Step 310: Determine whether the temperature value of the refrigerant in the second chamber 122 is equal to a preset temperature value;

[0152] Step 312: If not, it is determined that the refrigerant has not reached the condition for detecting the saturation pressure value, and the sensor group 126 repeatedly obtains the refrigerant temperature value in the second chamber 122;

[0153] Step 314: If yes, it is determined that the refrigerant has reached the condition for detecting the saturation pressure value, and the sensor group 126 is controlled to obtain the saturation pressure value of the refrigerant in the second chamber 122;

[0154] Step 316: Control the temperature control component 114 to stop working;

[0155] Step 318: Determine whether the initial deviation range between the saturation pressure value of the refrigerant in the second chamber 122 and the preset saturation pressure value is greater than the preset deviation range;

[0156] Step 320: If yes, it is determined that the refrigerant does not meet the type requirement of the target refrigerant and / or does not meet the purity requirement of the target refrigerant, and the first valve 140 is controlled to block the first flow path 100, and the detection and recovery of the refrigerant are stopped;

[0157] Step 322: If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve 140 to block the first flow path 100, control the second valve 240 to open the second flow path 200, and control the transmission part 212 to work to transport the refrigerant to the accommodating part 220.

[0158] Optionally, in an implementation of this embodiment, as Figure 4 As shown, the preset temperature value in the control method is 40° C., and the preset deviation range is 5%.

[0159]

[0160]

[0161] Table 1

[0162] Table 1 shows the saturated vapor pressure values ​​of various commonly used refrigerants at 40°C. The saturated vapor pressure values ​​of different types of refrigerants are different. When the refrigerant reaches a stable state that meets the detection conditions, it is determined whether the saturated pressure value of the refrigerant in the second chamber 122 obtained by the pressure sensor 130 is within the normal pressure value range under the 5% deviation corresponding to the target refrigerant type. If it is within the normal pressure value range, it is determined that the type and purity of the refrigerant to be recovered meet the recovery requirements of the target refrigerant, and the recovery operation can be performed. If it is not within the normal pressure value range, it is determined that the purity of the refrigerant to be recovered is low, or it is different from the type of the target refrigerant to be recovered. At this time, the recovery operation of the refrigerant to be recovered is stopped, and it can be directed to other storage spaces to be disposed of.

[0163] In this embodiment, if Figure 4 As shown, in the control method, the preset deviation range is 5%, so that the detection of the saturation pressure value of the refrigerant is more accurate, thereby improving the accuracy of identifying the type of refrigerant.

[0164] Specifically, Figure 4 As shown, the control method includes:

[0165] Step 402: Control the refrigerant to pass through the purification component 300;

[0166] Step 404: Control the first valve 140 to open the first flow path 100, and control the second valve 240 to block the second flow path 200;

[0167] Step 406: Control the temperature control component 114 to work and increase the temperature of the detection chamber 120;

[0168] Step 408: Control the sensor group 126 to work and obtain the refrigerant temperature value in the second chamber 122;

[0169] Step 410: Determine whether the refrigerant temperature in the second chamber 122 is equal to 40° C.;

[0170] Step 412: If not, it is determined that the refrigerant has not reached the condition for detecting the saturation pressure value, and the sensor group 126 repeatedly obtains the refrigerant temperature value in the second chamber 122;

[0171] Step 414: If yes, it is determined that the refrigerant has reached the condition for detecting the saturation pressure value, and the sensor group 126 is controlled to obtain the saturation pressure value of the refrigerant in the second chamber 122;

[0172] Step 416: Control the temperature control component 114 to stop working;

[0173] Step 418: Determine whether the initial deviation range between the saturation pressure value of the refrigerant in the second chamber 122 and the preset saturation pressure value is greater than 5%;

[0174] Step 420: If yes, it is determined that the refrigerant does not meet the type requirement of the target refrigerant and / or does not meet the purity requirement of the target refrigerant, and the first valve 140 is controlled to block the first flow path 100, and the detection and recovery of the refrigerant are stopped;

[0175] Step 422: If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve 140 to block the first flow path 100, control the second valve 240 to open the second flow path 200, and control the transmission part 212 to work to transport the refrigerant to the accommodating part 220.

[0176] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0177] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0178] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0179] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0180] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A refrigerant recovery system, characterized in that: include: A refrigerant outlet pipeline (400) for connecting to the refrigeration equipment to be recovered; A first flow path (100) and a second flow path (200) connected in parallel to an outlet end of the refrigerant outlet pipeline (400); A first flow path (100), wherein the first flow path (100) comprises a detection component (110) and a first valve (140), wherein the detection component (110) is arranged downstream of the first valve (140) and is used to detect a saturation pressure value of a refrigerant flowing into the first flow path (100); a second flow path (200), the second flow path (200) comprising a recovery component (210) and a second valve (240), the recovery component (210) being arranged downstream of the second valve (240) and being used for recovering the refrigerant flowing into the second flow path (200); The refrigerant recovery system is in a detection mode, the first flow path (100) and the second flow path (200) are configured such that the first valve (140) is open and the second valve (240) is closed, and the detection component (110) is capable of detecting a saturation pressure value of the refrigerant flowing into the first flow path (100); The refrigerant recovery system is in a recovery mode, the first valve (140) is closed, the second valve (240) is opened, and the recovery component (210) is capable of recovering the refrigerant flowing into the second flow path (200).

2. The refrigerant recovery system according to claim 1, characterized in that: The detection component (110) comprises: A temperature control chamber (112), wherein a first chamber is provided in the temperature control chamber (112), and a temperature control component (114) and a detection chamber (120) are provided in the first chamber; Wherein, the temperature control component (114) is used to maintain a constant temperature value in the temperature control chamber (112); The detection chamber (120) is formed with a second chamber (122), and the second chamber (122) is connected to the first flow path (100). The detection chamber (120) is provided with a sensor group (126), and the sensor group (126) includes a temperature sensor (128) and a pressure sensor (130), which are respectively used to detect the temperature value and saturation pressure value of the refrigerant in the detection chamber (120).

3. The refrigerant recovery system according to claim 2, characterized in that: The detection chamber (120) comprises: A controller (142), wherein the temperature sensor (128) and the pressure sensor (130) are electrically connected to the controller (142); The controller (142) is configured to control the pressure sensor (130) to detect the saturation pressure value of the refrigerant in the second chamber (122) when the temperature value detected by the temperature sensor (128) reaches a preset temperature value.

4. The refrigerant recovery system according to claim 2, characterized in that: The temperature control component (114) is arranged on a side of the detection chamber (120) away from the first valve (140), and the temperature control component (114) comprises a heating element (116) and a first fan (118).

5. The refrigerant recovery system according to claim 2, characterized in that: The recovery component (210) comprises: A transmission part (212) and a receiving part (220), wherein the receiving part (220) is arranged downstream of the transmission part (212), and the transmission part (212) is capable of transporting the refrigerant to the receiving part (220).

6. The refrigerant recovery system according to claim 5, characterized in that: The transmission unit (212) comprises: A compressor (214) and a condenser (216), wherein the condenser (216) is disposed downstream of the compressor (214); A second fan (218), wherein the second fan (218) is used to cool the condenser (216).

7. The refrigerant recovery system according to claim 6, characterized in that: The accommodating portion (220) comprises: a third valve (222), the third valve (222) being disposed downstream of the condenser (216); a storage tank (224), the storage tank (224) being disposed downstream of the third valve (222); Wherein, the third valve (222) is a one-way valve.

8. The refrigerant recovery system according to claim 5, characterized in that: The refrigerant recovery system further comprises: A purification component (300), wherein the purification component (300) is arranged on the refrigerant outlet pipeline (400).

9. A control method, characterized in that: The control method is used to control the refrigerant recovery system according to any one of claims 1 to 7, and the control method comprises: controlling the first valve (140) to open the first flow path (100), and controlling the second valve (240) to block the second flow path (200); Controlling the detection component (110) to obtain a saturation pressure value of the refrigerant; Determining whether a deviation range between the saturation pressure value of the refrigerant and a preset saturation pressure value is greater than a preset deviation range; If so, it is determined that the refrigerant does not meet the target refrigerant type requirement and / or does not meet the target refrigerant purity requirement, and the first valve (140) is controlled to block the first flow path (100), and the detection and recovery of the refrigerant are stopped; If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve (140) to block the first flow path (100), control the second valve (240) to open the second flow path (200), control the refrigerant to flow into the second flow path (200), and control the recovery component (210) to recover the refrigerant.

10. A control method, characterized in that: The control method is used to control the refrigerant recovery system according to claim 8, and the control method comprises: Controlling the refrigerant to pass through the purification component (300); controlling the first valve (140) to open the first flow path (100), and controlling the second valve (240) to block the second flow path (200); Controlling the temperature control component (114) to operate so as to increase the temperature of the detection chamber (120); controlling the sensor group (126) to operate and obtaining the refrigerant temperature value in the second chamber (122); Determining whether the temperature value of the refrigerant in the second chamber (122) is equal to a preset temperature value; If not, it is determined that the refrigerant has not reached the condition for detecting the saturation pressure value, and the sensor group (126) repeatedly obtains the refrigerant temperature value in the second chamber (122); If so, it is determined that the refrigerant has reached a condition for detecting a saturated pressure value, and the sensor group (126) is controlled to obtain the saturated pressure value of the refrigerant in the second chamber (122); Controlling the temperature control component (114) to stop working; determining whether an initial deviation range between a saturation pressure value of the refrigerant in the second chamber (122) and a preset saturation pressure value is greater than a preset deviation range; If so, it is determined that the refrigerant does not meet the target refrigerant type requirement and / or does not meet the target refrigerant purity requirement, and the first valve (140) is controlled to block the first flow path (100), and the detection and recovery of the refrigerant are stopped; If not, determine whether the refrigerant meets the type requirement of the target refrigerant and / or meets the purity requirement of the target refrigerant, control the first valve (140) to block the first flow path (100), control the second valve (240) to open the second flow path (200), and control the transmission part (212) to operate to transport the refrigerant to the accommodating part (220).

11. The control method according to claim 10, characterized in that: The preset temperature value is 40° C., and the preset deviation range is 5%.

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