Refrigerant recovery device

Abstract

The invention belongs to the technical field of refrigerant recovery, and particularly relates to a refrigerant recovery device which comprises a refrigerant extracting and purifying mechanism, a refrigerant storing and metering mechanism, a safety connector assembly, a position adjusting mechanism, a plurality of sets of temperature monitoring and auxiliary heat dissipation mechanisms, a refrigerant intermittent purity spot check mechanism and a PLC. Through precise sealed communication of the extraction purification and storage metering mechanism, rapid switching and continuous storage of the steel cylinder, temperature dynamic monitoring and self-adaptive heat dissipation, rapid purity detection and filling speed self-adaptive adjustment, the recovery efficiency is remarkably improved, refrigerant leakage and operation risks are reduced, the hidden danger of overpressure of the steel cylinder is avoided, it is guaranteed that the filling amount reaches the standard and safety meets the standard, and the recovery efficiency is improved. The purity of more than or equal to 99.5% is stably realized, batch unqualified products and rework waste are avoided, and safe and efficient compliant recovery is achieved.

Description

Technical Field

[0001] This invention belongs to the field of refrigerant recovery technology, and in particular relates to a refrigerant recovery device. Background Technology

[0002] Refrigerant recovery units are specialized industrial equipment used to extract, purify, and store refrigerant from refrigeration equipment (such as air conditioners, refrigerators, industrial chillers, cold chain equipment, etc.) that is either discarded or awaiting repair / scrap. Their core function is to efficiently extract gaseous, liquid, or gas-liquid mixtures of refrigerant from the refrigeration system, remove impurities (oil, moisture, solid particles) through processes such as filtration, drying, and separation, and store the refrigerant in dedicated steel cylinders after it reaches a purity standard suitable for reuse or compliant disposal, thus preventing direct discharge or waste of the refrigerant.

[0003] However, existing refrigerant recovery devices still have many technical shortcomings in practical applications: Firstly, the connection between the refrigerant extraction and purification mechanism and the storage and metering mechanism lacks a precise sealing design, resulting in slow connection speed and insufficient sealing, which limits the recovery efficiency and easily leads to refrigerant leakage. Secondly, cylinder replacement relies on manual operation and lacks a dedicated position adjustment and storage mechanism. The long interval between cylinder replacement operations can easily cause the recycling process to be interrupted, further reducing the overall operation efficiency. At the same time, leakage losses and personnel operation safety risks are relatively high. Third, the lack of real-time monitoring and adaptive heat dissipation mechanism for cylinder temperature makes it easy for internal pressure to rise abnormally when cylinder temperature rises, leading to safety hazards such as overpressure leakage and explosion. In addition, the filling amount may not meet the design standard due to the refrigerant vapor pressure reaching the threshold in advance, wasting storage capacity. Fourth, refrigerant purity testing is mostly done offline or is slow, making it impossible to provide real-time feedback and adjust the recycling and filling speed. This makes it difficult to ensure that the refrigerant is fully purified, which can easily lead to batches of substandard refrigerant and waste resources in rework, thus failing to meet the core requirements of industrial production for efficiency, safety and compliance. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a refrigerant recovery device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a refrigerant recovery device, comprising: The refrigerant extraction and purification mechanism is used to quickly extract and process residual refrigerant from abandoned equipment. A refrigerant storage and metering mechanism is connected to the refrigerant extraction and purification mechanism and is used to store and recycle the purified refrigerant. Safety connector assembly for a stable connection between refrigerant extraction and purification mechanism and refrigerant storage and metering mechanism; A position adjustment mechanism is fixedly installed at the bottom of the refrigerant storage and metering mechanism for moving and transporting the refrigerant storage and metering mechanism. Multiple temperature monitoring and auxiliary heat dissipation mechanisms are fixedly installed on the refrigerant storage and metering mechanism; A refrigerant intermittent purity sampling and testing mechanism is fixedly connected to the refrigerant extraction and purification mechanism; The PLC controller confirms the effective connection of the refrigerant extraction and purification mechanism and the refrigerant storage and metering mechanism based on the signal feedback from the safety connector assembly; it ensures that the storage temperature of the refrigerant storage and metering mechanism, as confirmed by the temperature monitoring and auxiliary heat dissipation mechanism, is negatively correlated with the operating power of the refrigerant extraction and purification mechanism; and it ensures that the storage temperature of the refrigerant storage and metering mechanism, as confirmed by the temperature monitoring and auxiliary heat dissipation mechanism, is positively correlated with the extraction frequency of the refrigerant intermittent purity sampling mechanism.

[0006] In the aforementioned refrigerant recovery device, the refrigerant extraction and purification mechanism includes an extraction pipe. An extraction head is fixedly installed at the front end of the extraction pipe. A compressor, an oil separator, a dryer filter, and a precision filter element filter are sequentially installed on the extraction pipe. A multi-port pipe is fixedly connected to the rear end of the extraction pipe. Multiple quick-connect male connectors are fixedly connected to the rear end of the multi-port pipe. Multiple electrically controlled on / off valves are also installed on the multi-port pipe. A flow meter is installed on the extraction pipe. A support frame is fixedly installed outside the multi-port pipe.

[0007] In the above-mentioned refrigerant recovery device, the refrigerant storage and metering mechanism includes a placement plate. Multiple limiting frames arranged in two rows are fixedly installed on the upper end of the placement plate. Storage cylinders are placed in the limiting frames. An inlet pipe is fixedly installed on one side of the upper end of the storage cylinder. One end of the inlet pipe is fixedly connected to a quick-connect female connector corresponding to the quick-connect male connector. A pressure gauge is also fixedly installed on the storage cylinder.

[0008] In the aforementioned refrigerant recovery device, the safety connector assembly includes multiple L-shaped positioning plates uniformly and fixedly connected to the outside of the quick-connect male connector. An electric push rod is fixedly inserted at the end of the L-shaped positioning plate, and a locking plate is fixedly connected to the moving end of the electric push rod. Two locking interfaces are opened on the surface of the locking plate. Multiple locking blocks that match and are inserted into the locking interfaces are fixedly connected to the outer walls of both the quick-connect male and female connectors. One side wall of the locking block is set as an inclined surface. A miniature laser rangefinder is also fixedly inserted at the end of the L-shaped positioning plate.

[0009] In the aforementioned refrigerant recovery device, the position adjustment mechanism includes two transverse electric slide rails disposed on the lower side of the placement plate. The upper ends of the moving ends of the two transverse electric slide rails are fixedly connected to the same moving plate. A rotary motor is fixedly installed at the center of the upper end of the moving plate. The upper output end of the rotary motor is fixedly connected to the lower end of the placement plate. A plurality of support rollers are also evenly fixedly connected to the lower end of the placement plate.

[0010] In the aforementioned refrigerant recovery device, the temperature monitoring and auxiliary heat dissipation mechanism includes a circular electric slide rail fixedly mounted on the upper end of the placement plate and sleeved outside the limiting frame. The moving end of the circular electric slide rail is symmetrically and fixedly connected to a first mounting plate and a second mounting plate. An array-type infrared thermometer is fixedly mounted on the first mounting plate, and a heat dissipation fan is fixedly mounted on the second mounting plate. The lower end of the heat dissipation fan is fixedly connected to an air supply pipe, and an air supply pump is mounted on the air supply pipe. The air supply pump is fixedly mounted on the second mounting plate, and the lower end of the air supply pipe is also fixedly connected to a temperature control component.

[0011] In the aforementioned refrigerant recovery device, the refrigerant intermittent purity sampling mechanism includes a sampling tube fixedly connected to the wall of the sampling tube, an electrically controlled on / off valve is installed on the sampling tube, and a purity detector is fixedly connected to the end of the sampling tube away from the sampling tube.

[0012] In the above-mentioned refrigerant recovery device, the temperature control component includes a temperature control shell fixedly connected to the lower end of the gas supply pipe. A semiconductor cooling plate is fixedly installed in the middle of the inner wall of the temperature control shell. A gas supply cylinder is fixedly connected to one side of the lower end of the temperature control shell. A dustproof net is fixedly installed at the lower end of the gas supply cylinder. A cooling fan is fixedly inserted at both the upper and lower ends of the other side of the temperature control shell.

[0013] Compared with existing technologies, the advantages of this invention are as follows: 1. Through the refrigerant extraction and purification mechanism, refrigerant storage and metering mechanism, and safety connector assembly, the refrigerant extraction and purification mechanism and the refrigerant storage and metering mechanism can be accurately, quickly, and in a sealed manner, thereby achieving rapid refrigerant recovery, which is safer and more efficient.

[0014] 2. Through the set position adjustment mechanism and refrigerant storage metering mechanism, the storage cylinder can be quickly switched and the refrigerant can be efficiently stored. This greatly shortens the operation interval time of the storage cylinder replacement, effectively avoids the problem of the recycling process being stopped due to the interruption of the cylinder replacement, and thus significantly improves the overall operation efficiency of refrigerant recycling. At the same time, it reduces the leakage loss of refrigerant during the cylinder replacement process and reduces the safety risks of personnel operation.

[0015] 3. Through the refrigerant storage metering mechanism, temperature monitoring and auxiliary heat dissipation mechanism, the temperature dynamic changes of the stored cylinders can be monitored in real time during the refrigerant recycling and filling process, and the adaptive auxiliary heat dissipation mechanism can be triggered to cool down in time, effectively avoiding the risk of abnormal internal pressure rise caused by cylinder temperature increase, and eliminating safety hazards such as overpressure leakage and explosion; at the same time, it avoids the problem of refrigerant vapor pressure reaching the safety threshold in advance due to excessive temperature, which would lead to the cylinder filling amount not meeting the design safety standard, thus ensuring the safety and compliance of the recycling and filling process and the full utilization of storage capacity.

[0016] 4. Through the set refrigerant intermittent purity sampling inspection mechanism, temperature monitoring and auxiliary heat dissipation mechanism, the purity of the purified and recovered refrigerant can be quickly detected, and the recovery and filling speed can be adaptively adjusted according to the test results to ensure that the refrigerant has sufficient purification reaction time in the purification system. This ensures that the purity of the recovered refrigerant meets the industrial standard of ≥99.5%. If the purity of the recovered refrigerant is detected to be lower than the 99.5% threshold twice in a row, the shutdown protection is immediately triggered to stop the subsequent refrigerant recovery and filling operation, effectively avoiding the generation of batches of unqualified refrigerant and the resulting waste of resources due to rework. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the refrigerant extraction and purification mechanism of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the refrigerant storage and metering mechanism of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the safety connector assembly of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the position adjustment mechanism of the present invention; Figure 6 This is a three-dimensional structural diagram of the temperature monitoring and auxiliary heat dissipation mechanism of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the refrigerant intermittent purity sampling inspection mechanism of the present invention; Figure 8 This is a three-dimensional structural diagram of the temperature control component of the present invention; Figure 9 This is a three-dimensional structural diagram of the storage cylinder of the present invention.

[0018] In the diagram: 1. Refrigerant extraction and purification mechanism; 11. Extraction pipe; 12. Extraction head; 13. Compressor; 14. Oil separator; 15. Dryer filter; 16. Precision filter element; 17. Multi-port pipe; 18. Quick-connect male connector; 19. Electrically controlled on / off valve; 110. Flow meter; 111. Support frame; 2. Refrigerant storage and metering mechanism; 21. Placement plate; 22. Limiting frame; 23. Storage cylinder; 24. Inlet pipe; 25. Quick-connect female connector; 26. Barometer; 3. Safety connector assembly; 31. L-shaped positioning plate; 32. Electric push rod; 33. Locking plate; 34. Locking interface; 35. Locking block; 3 6. Miniature laser rangefinder; 4. Position adjustment mechanism; 41. Horizontal electric slide rail; 42. Moving plate; 43. Rotary motor; 44. Supporting roller; 5. Temperature monitoring and auxiliary heat dissipation mechanism; 51. Circular electric slide rail; 52. First mounting plate; 53. Second mounting plate; 54. Array infrared thermometer; 55. Heat dissipation fan; 56. Gas supply pipe; 57. Gas supply pump; 6. Refrigerant intermittent purity sampling inspection mechanism; 61. Sampling pipe; 62. Electrically controlled on / off valve; 63. Purity detector; 7. Temperature control component; 71. Temperature control shell; 72. Semiconductor refrigeration plate; 73. Gas supply cylinder; 74. Heat dissipation fan. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-9 As shown, a refrigerant recovery device includes: The refrigerant extraction and purification mechanism 1 is used to quickly extract and process residual refrigerant in waste equipment. The refrigerant extraction and purification mechanism 1 includes an extraction pipe 11, an extraction head 12 is fixedly installed at the front end of the extraction pipe 11, and a compressor 13, an oil separator 14, a dryer filter 15 and a precision filter element 16 are sequentially installed on the extraction pipe 11. The rear end of the extraction pipe 11 is fixedly connected to a multi-port pipe 17, and the rear end of the multi-port pipe 17 is fixedly connected to multiple quick-connect male connectors 18. Multiple electrically controlled on / off valves 19 are also installed on the multi-port pipe 17. A flow meter 110 is installed on the extraction pipe 11, and a support frame 111 is fixedly installed outside the multi-port pipe 17.

[0021] The refrigerant storage and metering mechanism 2 is connected to the refrigerant extraction and purification mechanism 1 and is used to store and recycle the purified refrigerant. The refrigerant storage and metering mechanism 2 includes a placement plate 21. Multiple limit frames 22 arranged in two rows are fixedly installed on the upper end of the placement plate 21. Storage cylinders 23 are placed in the limit frames 22. An inlet pipe 24 is fixedly installed on one side of the upper end of the storage cylinder 23. One end of the inlet pipe 24 is fixedly connected to a quick-connect female connector 25 corresponding to the quick-connect male connector 18. A barometer 26 is also fixedly installed on the storage cylinder 23.

[0022] Safety connector assembly 3 is used for a stable connection between refrigerant extraction and purification mechanism 1 and refrigerant storage and metering mechanism 2. Safety connector assembly 3 includes multiple L-shaped positioning plates 31 that are uniformly fixedly connected to the outside of quick-connect male connector 18. An electric push rod 32 is fixedly inserted at the end of the L-shaped positioning plate 31. A locking plate 33 is fixedly connected to the moving end of the electric push rod 32. Two locking interfaces 34 are opened on the surface of the locking plate 33. Multiple locking blocks 35 that match and are inserted into the locking interfaces 34 are fixedly connected to the outer walls of quick-connect male connector 18 and quick-connect female connector 25. One side wall of the locking block 35 is set as a slope. A miniature laser rangefinder 36 is also fixedly inserted at the end of the L-shaped positioning plate 31.

[0023] The position adjustment mechanism 4 is fixedly installed at the bottom of the refrigerant storage and metering mechanism 2 and is used to move and transport the refrigerant storage and metering mechanism 2. The position adjustment mechanism 4 includes two transverse electric slide rails 41 set on the lower side of the placement plate 21. The upper end of the moving end of the two transverse electric slide rails 41 is fixedly connected to the same moving plate 42. A rotary motor 43 is fixedly installed at the center of the upper end of the moving plate 42. The upper output end of the rotary motor 43 is fixedly connected to the lower end of the placement plate 21. A plurality of support rollers 44 are also evenly fixedly connected to the lower end of the placement plate 21.

[0024] Multiple temperature monitoring and auxiliary heat dissipation mechanisms 5 are fixedly installed on the refrigerant storage and metering mechanism 2. The temperature monitoring and auxiliary heat dissipation mechanism 5 includes a circular electric slide rail 51 fixedly installed on the upper end of the placement plate 21 and sleeved outside the limit frame 22. The moving end of the circular electric slide rail 51 is symmetrically fixedly connected to a first mounting plate 52 and a second mounting plate 53. An array-type infrared thermometer 54 is fixedly installed on the first mounting plate 52. A heat dissipation fan 55 is fixedly installed on the second mounting plate 53. The lower end of the heat dissipation fan 55 is fixedly connected to an air supply pipe 56. An air supply pump 57 is installed on the air supply pipe 56. The air supply pump 57 is fixedly installed on the second mounting plate 53. The lower end of the air supply pipe 56 is also fixedly connected to a temperature control component 7.

[0025] The temperature control assembly 7 includes a temperature control shell 71 fixedly connected to the lower end of the air supply pipe 56. A semiconductor cooling plate 72 is fixedly installed in the middle of the inner wall of the temperature control shell 71. An air supply cylinder 73 is fixedly connected to one side of the lower end of the temperature control shell 71. A dustproof net is fixedly installed at the lower end of the air supply cylinder 73. A cooling fan 74 is fixedly inserted at both the upper and lower ends of the other side of the temperature control shell 71.

[0026] The refrigerant intermittent purity sampling mechanism 6 is fixedly connected to the refrigerant extraction and purification mechanism 1. The refrigerant intermittent purity sampling mechanism 6 includes a sampling tube 61 fixedly connected to the wall of the extraction tube 11. An electrically controlled on / off valve 62 is installed on the sampling tube 61. A purity detector 63 is fixedly connected to the end of the sampling tube 61 away from the extraction tube 11.

[0027] The PLC controller confirms whether the refrigerant extraction and purification mechanism 1 and the refrigerant storage and metering mechanism 2 are effectively connected based on the signal fed back from the safety connector assembly 3; it makes the storage temperature of the refrigerant storage and metering mechanism 2 confirmed by the temperature monitoring and auxiliary heat dissipation mechanism 5 negatively correlated with the working power of the refrigerant extraction and purification mechanism 1; and it makes the storage temperature of the refrigerant storage and metering mechanism 2 confirmed by the temperature monitoring and auxiliary heat dissipation mechanism 5 positively correlated with the extraction frequency of the refrigerant intermittent purity sampling mechanism 6.

[0028] The operating principle of this invention is described as follows: After the operator places the storage cylinder 23 into the limiting frame 22 for positioning and fixation, the PLC controller activates the horizontal electric slide rail 41, driving the placement plate 21 to move towards the refrigerant extraction and purification mechanism 1. This ensures that the quick-connect female connector 25 on the storage cylinder 23 is precisely aligned and quickly connected with the quick-connect male connector 18 at one end of the multi-port pipe 17, achieving the initial connection between the refrigerant extraction and purification mechanism 1 and the refrigerant storage and metering mechanism 2. Subsequently, the PLC controller controls multiple electric push rods 32 to move synchronously, pushing the locking plate 33 towards the locking block 35 on the quick-connect male connector 18 and the quick-connect female connector 25. Through the matching insertion of the locking interface 34 on the locking plate 33 and the locking block 35, the connection stability between the quick-connect male connector 18 and the quick-connect female connector 25 is enhanced. During the movement of the locking plate 33, the miniature laser rangefinder 36 on the L-shaped positioning plate 31 detects the distance between itself and the locking plate 33 in real time. When the detected distance reaches the set threshold, it is determined that the locking plate 33 has moved into place and the quick-connect male connector 18 and quick-connect female connector 25 are connected effectively. If the locking plate 33 is not moved into place due to the obstruction of the locking block 35, the detected distance of the miniature laser rangefinder 36 will be less than the set threshold. At this time, the instrument immediately sends a signal to the PLC controller, and the PLC controller then sends a warning signal to the staff receiving terminal to remind them to check and handle the issue in time. This ensures that the connection between the two is accurate and stable, and avoids refrigerant leakage caused by improper connection, which could lead to safety and environmental risks such as frostbite, poisoning, environmental pollution, and waste of resources. After the staff connects the extraction head 12 to the refrigerant storage module of the waste equipment, the PLC controller first opens the electrically controlled on / off valve 19 on the multi-port pipe 17 corresponding to a storage cylinder 23, connecting the cylinder to the recovery pipeline. Then, the compressor 13 starts to provide extraction power, and the residual refrigerant in the waste equipment is extracted to the recovery system through the extraction pipe 11. The recovered refrigerant first enters the oil separator 14 to separate the mixed refrigeration oil (separation efficiency ≥99%). After oil separation, the refrigerant enters the dryer filter 15 to remove moisture (dew point ≤-40℃) and solid particles (filtration accuracy 5μm). Finally, it undergoes deep purification through the precision filter element 16 to ensure that the refrigerant purity is not less than 99.5%, meeting the reuse requirements. Simultaneously, the flow meter 110 on the extraction pipe 11 records the amount of refrigerant recovered and delivered to the storage cylinder 23 in real time, and the pressure gauge 26 on the storage cylinder 23 synchronously monitors the pressure changes inside the cylinder, providing data support for subsequent control. During refrigerant storage in the storage cylinder 23, the PLC controller activates the corresponding temperature monitoring and auxiliary heat dissipation mechanism 5: the circular electric slide rail 51 drives the first mounting plate 52 and the second mounting plate 53 to move at a constant speed around the storage cylinder 23, and the array-type infrared thermometer 54 on the first mounting plate 52 monitors the cylinder storage temperature in real time from all angles. When the cylinder temperature exceeds 30°C, the PLC controller activates the air supply pump 57, which supplies air to the heat dissipation fan 55 through the air supply pipe 56 to cool the cylinder and prevent the cylinder pressure from rising rapidly due to temperature, which could lead to overpressure leakage, cylinder deformation, or even explosion. When the cylinder temperature exceeds 35°C, the PLC controller further activates the temperature control component 7: the semiconductor cooling plate 72 inside the temperature control shell 71 starts working, with its cold end facing the suction position of the air supply pipe 56 to reduce the temperature of the supplied air and improve the heat dissipation effect. At the same time, the two heat dissipation fans 74 on the other side of the temperature control shell 71 start simultaneously to quickly dissipate the heat generated by the hot end of the semiconductor cooling plate 72. In addition, the higher the temperature of the gas cylinder detected by the array infrared thermometer 54 or the faster the temperature rise rate, the greater the current input from the power supply equipment controlled by the PLC controller to the semiconductor cooling plate 72, the stronger the cooling effect, and at the same time, the working power of the heat dissipation fan 74 is increased to ensure that the heat dissipation efficiency of the hot end of the semiconductor cooling plate 72 matches the cooling demand. The PLC controller calculates the ratio between the gas pressure inside the cylinder monitored by the barometer 26 and the refrigerant recovery amount recorded by the flow meter 110, and compares it with a preset threshold (adapted to the refrigerant type and cylinder rated parameters). If the ratio is greater than the preset threshold, it means that the gas pressure inside the cylinder is increasing too fast. At this time, the PLC controller automatically reduces the working power of the compressor 13 to allow sufficient cooling time for the cylinder. This avoids the problem that the cylinder cannot be stored before it is filled to the design capacity due to the gas pressure reaching the safety threshold in advance, thereby reducing the waste of cylinder storage space and the loss of recycling efficiency. The PLC controller controls the refrigerant intermittent purity sampling mechanism 6 to operate according to a preset cycle. Under normal conditions, sampling occurs every 30 seconds: the PLC controller opens the electrically controlled on / off valve 62, allowing a portion of the refrigerant (approximately 0.5-1 mL) in the sampling tube 11 to enter the purity detector 63 for purity testing. The test results are fed back and controlled according to the following logic: When the purity is >99.5%, maintain the current recovery parameters and continue normal recovery operations; When the purity is between 99% and 99.5%, the PLC controller adaptively reduces the operating power of the compressor 13 according to the purity value (the lower the purity, the greater the power reduction), extending the purification time of the refrigerant in the oil separator 14, the dryer filter 15, and the precision filter element 16; if the purity is still below 99.5% in the next sampling inspection, the purification system is judged to have failed, the machine is immediately shut down, and a warning signal is sent to the staff receiving terminal to prompt emergency handling; When the purity is less than 99%, the recycling is deemed unqualified, the machine is immediately stopped, and staff are prompted to check and replace the core components of the purification system (such as oil separator 14 filter element, dryer filter 15, and precision filter element 16).

[0029] Meanwhile, when the array-type infrared thermometer 54 detects that the cylinder temperature exceeds the set threshold, the PLC controller automatically increases the purity sampling frequency (e.g., from 30 seconds / time to 15 seconds / time). This is because rising temperatures may cause refrigerant decomposition and impurity migration, thus affecting the purification system's processing effect. High-frequency sampling can capture purity fluctuations in real time, preventing the generation of batches of substandard refrigerant. In addition, during the sampling process, the PLC controller automatically adjusts the opening time of the electrically controlled on / off valve 62 based on the compressor 13's operating power: the lower the compressor 13's operating power, the slower the refrigerant flow rate, and the longer the electrically controlled on / off valve 62's opening time, ensuring sufficient sampling samples are obtained and guaranteeing the accuracy of the test results. When the flow meter 110 on the extraction pipe 11 confirms that the refrigerant recovery amount of a certain storage cylinder 23 has reached the designed filling threshold, the cylinder completes the storage work. The PLC controller immediately closes the corresponding electrically controlled on / off valve 19 on the multi-port pipe 17 and opens the electrically controlled on / off valve 19 corresponding to the next empty cylinder, realizing continuous and uninterrupted refrigerant recovery. When all the storage cylinders 23 in a row have been filled, the PLC controller controls the safety connector assembly 3 to release the fixation of the quick-connect male connector 18 and quick-connect female connector 25. The transverse electric slide rail 41 drives the placement plate 21 to move backward and reset. Then, the rotary motor 43 drives the placement plate 21 to rotate 180 degrees, rotating the empty storage cylinder 23 on the other side to the working position. The transverse electric slide rail 41 pushes the placement plate 21 forward again, so that the quick-connect female connector 25 of the empty cylinder connects with the quick-connect male connector 18 of the multi-port pipe 17, and the refrigerant recovery work continues. The filled cylinders are located in the rear area, making it convenient for staff to collect and process them, greatly reducing the interval between cylinder changing operations and improving overall recycling efficiency.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A refrigerant recovery device, characterized in that, include: A refrigerant extraction and purification mechanism (1) is used to quickly extract and process residual refrigerant in waste equipment; A refrigerant storage and metering mechanism (2) is connected to the refrigerant extraction and purification mechanism (1) and is used to store and recycle the purified refrigerant. Safety connector assembly (3) for a stable connection between refrigerant extraction and purification mechanism (1) and refrigerant storage and metering mechanism (2); The position adjustment mechanism (4) is fixedly installed at the bottom of the refrigerant storage metering mechanism (2) and is used to move and transport the refrigerant storage metering mechanism (2). Multiple temperature monitoring and auxiliary heat dissipation mechanisms (5) are fixedly installed on the refrigerant storage and metering mechanism (2); The refrigerant intermittent purity sampling and testing mechanism (6) is fixedly connected to the refrigerant extraction and purification mechanism (1); The PLC controller confirms whether the refrigerant extraction and purification mechanism (1) and the refrigerant storage and metering mechanism (2) are connected effectively based on the signal feedback from the safety connector assembly (3); makes the storage temperature of the refrigerant storage and metering mechanism (2) confirmed by the temperature monitoring and auxiliary heat dissipation mechanism (5) negatively correlated with the working power of the refrigerant extraction and purification mechanism (1); and makes the storage temperature of the refrigerant storage and metering mechanism (2) confirmed by the temperature monitoring and auxiliary heat dissipation mechanism (5) positively correlated with the extraction frequency of the refrigerant intermittent purity sampling mechanism (6).

2. The refrigerant recovery device according to claim 1, characterized in that, The refrigerant extraction and purification mechanism (1) includes an extraction pipe (11), an extraction head (12) is fixedly installed at the front end of the extraction pipe (11), a compressor (13), an oil separator (14), a dryer filter (15) and a precision filter element filter (16) are installed sequentially on the extraction pipe (11), a multi-port pipe (17) is fixedly connected to the rear end of the extraction pipe (11), a multi-port pipe (17) is fixedly connected to the rear end of the multi-port pipe (17), a multi-plug male connector (18) is fixedly connected to the rear end of the multi-port pipe (17), a multi-electrically controlled on / off valve (19) is also installed on the multi-port pipe (17), a flow meter (110) is installed on the extraction pipe (11), and a support frame (111) is fixedly installed outside the multi-port pipe (17).

3. The refrigerant recovery device according to claim 2, characterized in that, The refrigerant storage and metering mechanism (2) includes a placement plate (21). Multiple limiting frames (22) arranged in two rows are fixedly installed on the upper end of the placement plate (21). Storage cylinders (23) are placed inside the limiting frames (22). An inlet pipe (24) is fixedly installed on one side of the upper end of the storage cylinder (23). One end of the inlet pipe (24) is fixedly connected to a quick-connect female connector (25) corresponding to the quick-connect male connector (18). A barometer (26) is also fixedly installed on the storage cylinder (23).

4. The refrigerant recovery device according to claim 3, characterized in that, The safety connector assembly (3) includes multiple L-shaped positioning plates (31) uniformly fixedly connected to the outside of the quick-connect male connector (18). An electric push rod (32) is fixedly inserted at the end of the L-shaped positioning plate (31). A locking plate (33) is fixedly connected to the moving end of the electric push rod (32). Two locking interfaces (34) are opened on the surface of the locking plate (33). Multiple locking blocks (35) that match and are inserted into the locking interfaces (34) are fixedly connected to the outer walls of the quick-connect male connector (18) and the quick-connect female connector (25). One side wall of the locking block (35) is set as an inclined surface. A miniature laser rangefinder (36) is also fixedly inserted at the end of the L-shaped positioning plate (31).

5. A refrigerant recovery device according to claim 3, characterized in that, The position adjustment mechanism (4) includes two transverse electric slide rails (41) disposed on the lower side of the placement plate (21). The upper ends of the moving ends of the two transverse electric slide rails (41) are fixedly connected to the same moving plate (42). A rotary motor (43) is fixedly installed at the center of the upper end of the moving plate (42). The upper output end of the rotary motor (43) is fixedly connected to the lower end of the placement plate (21). A plurality of support rollers (44) are also evenly fixedly connected to the lower end of the placement plate (21).

6. A refrigerant recovery device according to claim 3, characterized in that, The temperature monitoring and auxiliary heat dissipation mechanism (5) includes a circular electric slide rail (51) fixedly installed on the upper end of the placement plate (21) and sleeved outside the limit frame (22). The moving end of the circular electric slide rail (51) is symmetrically fixedly connected to a first mounting plate (52) and a second mounting plate (53). An array infrared thermometer (54) is fixedly installed on the first mounting plate (52). A heat dissipation fan (55) is fixedly installed on the second mounting plate (53). The lower end of the heat dissipation fan (55) is fixedly connected to an air supply pipe (56). An air supply pump (57) is installed on the air supply pipe (56). The air supply pump (57) is fixedly installed on the second mounting plate (53). The lower end of the air supply pipe (56) is also fixedly connected to a temperature control component (7).

7. A refrigerant recovery device according to claim 2, characterized in that, The refrigerant intermittent purity sampling mechanism (6) includes a sampling tube (61) fixedly connected to the wall of the sampling tube (11), an electrically controlled on / off valve (62) is installed on the sampling tube (61), and a purity detector (63) is fixedly connected to one end of the sampling tube (61) away from the sampling tube (11).

8. A refrigerant recovery device according to claim 6, characterized in that, The temperature control assembly (7) includes a temperature control shell (71) fixedly connected to the lower end of the gas supply pipe (56). A semiconductor cooling plate (72) is fixedly installed in the middle of the inner wall of the temperature control shell (71). A gas supply cylinder (73) is fixedly connected to one side of the lower end of the temperature control shell (71). A dustproof net is fixedly installed at the lower end of the gas supply cylinder (73). A cooling fan (74) is fixedly inserted at both the upper and lower ends of the other side of the temperature control shell (71).

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