Refrigerant extraction device of air conditioner compressor

Abstract

The invention relates to a refrigerant extraction device for an air conditioner compressor. The refrigerant extraction device comprises a connecting pipeline assembly, a vacuumizing collection mechanism and a vibration mechanism. The connecting pipeline assembly is connected with a high-pressure port and a low-pressure port of the compressor through a first pipeline and a second pipeline respectively, pressure gauges are arranged on the pipelines to monitor pressure in real time, and extraction safety is guaranteed. The vacuumizing collection mechanism is composed of a vacuum pump, recovery containers and a gas-liquid-solid separation assembly, the vacuum pump vacuumizes and extracts the residual refrigerant, and the gas-liquid-solid separation assembly separates gas, liquid and solid impurities in the refrigerant and then introduces the separated gas, liquid and solid impurities into the corresponding recovery containers. The vibration mechanism is of a magnetic attraction buckle structure and is detachably installed outside the compressor, an oil film-shaped mixture on the inner wall of the compressor is promoted to fall off and be discharged through vibration during vacuumizing, and the refrigerant extraction purity and efficiency are improved. The device can efficiently extract refrigerants and separate impurities, and the recovery purity and safety are guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of mechanical engineering and refrigeration technology, and particularly relates to a refrigerant extraction device for an air-conditioning compressor. Background Art

[0002] When air conditioners and other refrigeration equipment are scrapped and dismantled, refrigerants (such as Freon) and liquids like refrigeration oil often remain inside the compressor. Cutting or crushing the compressor without first removing these harmful gases and liquids can cause the refrigerant to rapidly leak into the atmosphere, polluting the environment and potentially posing a health risk to on-site personnel. Furthermore, after prolonged idle time, the refrigerant in the compressor may mix with the refrigeration oil, forming a viscous oil film or deposits on the compressor chamber walls. These residues are difficult to remove with simple vacuuming, hindering subsequent disassembly and recycling.

[0003] Currently, air conditioning refrigerant is primarily recovered using dedicated refrigerant recovery machines, which utilize a compressor to extract the refrigerant from the system and compress it for storage. While effective, this forced extraction recovery method has certain limitations: if the compressor being recycled is damaged and inoperable or there is a lack of on-site power, traditional recovery machines may not function properly. Furthermore, conventional recovery processes often focus solely on extracting the gaseous refrigerant, lacking effective means to handle the liquid mixture adhering to the compressor's inner walls. This results in residual liquid remaining within the compressor, potentially leaking and contaminating the environment during subsequent disassembly.

[0004] In view of the above problems, the present invention provides an air-conditioning compressor refrigerant device to at least partially solve the above problems. Summary of the Invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides an air-conditioning compressor refrigerant extraction device, which solves the problems that the dedicated recovery machine commonly used for air-conditioning refrigerant recovery can effectively recover the refrigerant through forced suction by the compressor, but it cannot work when the compressor to be recovered is damaged or has no power supply, and the conventional recovery does not sufficiently treat the liquid mixture on the inner wall of the compressor, resulting in the residual liquid and subsequent disassembly may pollute the environment.

[0006] The purpose of the present invention can be achieved through the following technical solution: An air-conditioning compressor refrigerant extraction device, comprising: Connecting pipe assembly: including a first pipe and a second pipe, respectively used to connect to the high-pressure port and the low-pressure port of the compressor; the first pipe and the second pipe are each provided with a pressure gauge for monitoring the pressure in the pipe and the inner cavity of the compressor during the extraction process; A vacuum collection mechanism, wherein the other ends of the first pipe and the second pipe are connected to the vacuum collection mechanism; the vacuum collection mechanism includes a vacuum pump, a recovery container, and a gas-liquid-solid separation component. The vacuum pump is used to vacuum the interior of the compressor to extract residual refrigerant. The gas-liquid-solid separation component is arranged on the flow path between the vacuum pump and the recovery container, and is used to separate gas, liquid and solid impurities and guide them to the recovery container. Vibration mechanism: The vibration mechanism is detachably connected to the outside of the compressor through a magnetic snap structure, and is used to apply vibration to the compressor during the vacuuming process to cause the oil film-like mixture attached to the inner wall of the compressor to fall off and be discharged with the airflow.

[0007] As a preferred technical solution of the present invention, the first pipeline and the second pipeline are respectively provided with a shut-off valve for controlling the on-off of the pipeline; the shut-off valve opens after the compressor is connected and closes after the vacuuming is completed, so as to isolate the compressor from the subsequent pipeline.

[0008] As a preferred technical solution of the present invention, the first pipe and the second pipe are both made of double-layer metal hoses, with the inner layer being a stainless steel bellows and the outer layer being a woven steel mesh.

[0009] As a preferred technical solution of the present invention, the vibration mechanism is provided with an eccentric motor mounted on a fixed bracket of the compressor. The eccentric motor is rigidly adsorbed on the surface of the compressor casing through a magnetic base, driving the compressor to generate 20-100Hz mechanical vibration.

[0010] As a preferred technical solution of the present invention, the eccentric motor has a variable frequency control function.

[0011] As a preferred technical solution of the present invention, the recovery container consists of a gaseous refrigerant recovery tank, a liquid refrigerant recovery tank and a solid impurity collection box, and the gas outlet, liquid outlet and solid outlet of the gas-liquid-solid separation component are respectively connected to the corresponding recovery tank or collection box.

[0012] As a preferred technical solution of the present invention, an activated carbon adsorption layer is provided in the gaseous refrigerant recovery tank for adsorbing odor and small molecular impurities in the gaseous refrigerant.

[0013] As a preferred technical solution of the present invention, a liquid level sensor is provided at the bottom of the liquid refrigerant recovery tank, and the liquid level sensor is electrically connected to the control circuit of the vacuum pump. When the liquid level reaches a preset threshold, an alarm signal is triggered and the vacuum operation is automatically stopped.

[0014] As a preferred technical solution of the present invention, the gas-liquid-solid separation component includes: A first-stage cyclone separator, whose mixing inlet is connected to the vacuum pump outlet, is used to centrifugally separate the gas-liquid-solid mixture into pure gas and a liquid-solid mixture, wherein the pure gas is output through the gas outlet and the liquid-solid mixture is output through the solid-liquid outlet; The gas inlet of the secondary condenser is connected to the gas outlet of the primary cyclone separator, and the tube wall is provided with forced air cooling fins to condense the pure gas into liquid; The three-stage filtration unit has a liquid inlet connected to the liquid outlet of the secondary condenser, and a solid inlet connected to the solid-liquid outlet of the first-stage cyclone separator. It has a built-in 50-100μm stainless steel filter to intercept solid particles in the liquid flow.

[0015] The beneficial effects of the present invention are: through the dual-pipe design of the connecting pipe assembly and the pressure gauge monitoring, the high and low pressure ports of the compressor can be connected at the same time to achieve balanced vacuuming. With a double-layer metal hose and a stop valve with a pressure resistance of ≥2.5MPa, it solves the limitation of traditional recovery machines relying on compressor operation or external power supply, and ensures operational safety; the gas-liquid-solid separation component in the vacuum collection mechanism undergoes three-stage treatment of cyclonic centrifugation, forced condensation, and fine filtration, combined with the activated carbon adsorption layer in the gas tank and the liquid tank level sensor linkage shutdown setting, to achieve synchronous separation and recovery of gas, liquid and solid impurities, avoiding subsequent disassembly pollution; the vibration mechanism generates 20-100Hz variable frequency vibration through the eccentric wheel motor installed by the magnetic buckle, which promotes the shedding and discharge of the oil film and sediment on the inner wall of the compressor, thereby improving the purity and efficiency of refrigerant recovery, shortening the recovery time, and reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the flow chart of the first-stage cyclone separator of the present invention; Figure 3 This is a schematic diagram of the secondary condenser flow chart of the present invention; Figure 4 It is a schematic diagram of the flow chart of the three-stage filtration unit of the present invention.

[0018] In the figure: 1. compressor; 2. first pipeline; 3. second pipeline; 4. pressure gauge; 5. stop valve; 6. vacuum pump; 7. recovery container; 8. gas-liquid-solid separation component; 81. first-stage cyclone separator; 82. second-stage condenser; 83. third-stage filter unit; 9. vibration mechanism. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] See also Figure 1-Figure 4 This embodiment provides an air-conditioning compressor refrigerant extraction device, including a connecting pipe assembly, a vacuum collection mechanism and a vibration mechanism 9.

[0021] The connecting pipe assembly includes a first pipe 2 and a second pipe 3, which are respectively connected to the high-pressure port and the low-pressure port of the compressor 1 of the refrigerant to be recovered. Among them, a pressure gauge 4 is provided on each of the first pipe 2 and the second pipe 3 to monitor the pressure in the pipe and the inner cavity of the compressor 1 during the extraction process. At the same time, a shut-off valve 5 is also provided on the first pipe 2 and the second pipe 3 to control the on-off of the pipeline; the shut-off valve 5 opens after the compressor 1 is connected and closes after the vacuuming is completed, and is used to isolate the compressor 1 from the subsequent pipeline. Specifically, the first pipe 2 and the second pipe 3 both use double-layer metal hoses, the inner layer of which is a stainless steel bellows and the outer layer is a woven steel mesh, with a pressure resistance level of ≥2.5MPa.

[0022] The above-mentioned connecting pipe assembly is one of the key parts of the refrigerant extraction device of the air-conditioning compressor 1. It adopts a dual-channel setting, and is connected to the high and low pressure ports of the compressor 1 through the first and second pipes 3 respectively, so as to realize balanced refrigerant extraction to improve the recovery efficiency; in terms of function, it is equipped with a pressure gauge 4 to monitor the pressure in real time, and combined with the stop valve 5 to flexibly control the pipeline on and off, effectively avoiding the risk of overpressure and preventing refrigerant leakage; the material is a double-layer metal hose, the inner layer of stainless steel bellows has both flexibility and corrosion resistance, and the outer layer of woven steel mesh enhances the pressure resistance, and the pressure resistance level is ≥2.5MPa, ensuring stable transmission of refrigerant under high-pressure environment, and comprehensively guaranteeing the efficiency and safety of the extraction process.

[0023] The vacuum collection mechanism serves as the core module for refrigerant purification and recovery. It is coordinated with the vacuum pump 6, the gas-liquid-solid separation component 8 and the recovery container 7. The other ends of the first pipe 2 and the second pipe 3 are connected to the vacuum pump 6 of the vacuum collection mechanism. The vacuum pump 6 is used to vacuum the inside of the compressor 1 and extract residual refrigerant; the gas-liquid-solid separation component 8 is arranged on the flow path between the vacuum pump 6 and the recovery container 7, and is used to separate gas, liquid and solid impurities and guide them to the recovery container 7.

[0024] Preferably, the recovery container 7 consists of a gaseous refrigerant recovery tank, a liquid refrigerant recovery tank and a solid impurity collection box, which correspond to the gas outlet, liquid outlet and solid outlet of the gas-liquid-solid separation component 8 respectively, ensuring accurate classification and recovery of substances in different forms to avoid cross contamination.

[0025] Preferably, an activated carbon adsorption layer is provided in the gaseous refrigerant recovery tank, and the adsorption characteristics of the activated carbon are utilized to effectively remove odorous substances and small molecular impurities in the gaseous refrigerant, thereby further improving the purity of the recovered refrigerant.

[0026] Preferably, a liquid level sensor is installed at the bottom of the liquid refrigerant recovery tank, which is electrically connected to the control circuit of the vacuum pump 6. When the liquid level in the tank reaches a preset threshold, the liquid level sensor triggers an alarm signal and automatically cuts off the power supply of the vacuum pump 6 to prevent liquid refrigerant from overflowing, thereby ensuring operational safety and system stability.

[0027] Preferably, the gas-liquid-solid separation component 8 adopts a three-stage processing flow: a first-stage cyclone separator 81, whose mixed inlet is connected to the outlet of the vacuum pump 6, separates the gas-liquid-solid mixture into pure gas and a liquid-solid mixture by centrifugal force, and the pure gas is output to the second-stage condenser 82 through the gas outlet, and the liquid-solid mixture is transported to the third-stage filter unit 83 through the solid-liquid outlet. The gas inlet of the second-stage condenser 82 is connected to the gas outlet of the first-stage cyclone separator 81, and the tube wall is integrated with forced air-cooled heat dissipation fins, which quickly condense the pure gaseous refrigerant into liquid through efficient heat dissipation. The third-stage filter unit 83 has a liquid inlet connected to the liquid outlet of the second-stage condenser 82 and a solid inlet connected to the solid-liquid outlet of the first-stage cyclone separator 81. It has a built-in 50-100μm stainless steel filter mesh that can intercept tiny solid particles in the liquid refrigerant to ensure that the purity of the refrigerant finally recovered meets the standards.

[0028] Specifically, vacuum pump 6 evacuates the interior of compressor 1 through connecting pipes, extracting any remaining refrigerant gas. After the gas-liquid-solid mixture is output from vacuum pump 6 to primary cyclone separator 81, it rotates at high speed within the separator. Centrifugal force forces denser liquid droplets and solid particles toward the separator's inner wall, forming a liquid-solid mixture that is discharged through the solid-liquid outlet. Pure, less dense gaseous refrigerant is then discharged through the gas outlet. The discharged pure gaseous refrigerant then enters secondary condenser 82. Forced air cooling fins integrated into the tube wall significantly increase the heat dissipation area. Combined with forced convection from the fan, this rapidly releases heat from the gaseous refrigerant, rapidly condensing it into a liquid state. Finally, the liquid refrigerant flows into the three-stage filtration unit 83, and the liquid-solid mixture discharged from the first-stage cyclone separator 81 also enters the unit. The built-in 50-100μm stainless steel sintered filter mesh, with its precise pore structure, effectively intercepts solid impurities such as metal debris, oil condensation particles, etc. in the liquid flow, ensuring that the refrigerant that finally flows into the recovery container 7 meets high purity standards; among them, the uncondensed gaseous refrigerant enters the gaseous refrigerant recovery tank through the gaseous outlet, and the activated carbon layer in the tank absorbs impurities and odors therein.

[0029] The vibration mechanism 9 consists of an eccentric motor and a magnetic base. When vacuuming begins, the vibration mechanism 9 is attached to the compressor 1 casing via the magnetic base and the motor is started, generating mechanical vibrations at a frequency of 20-100 Hz. This vibration loosens and dislodges the oil film and sediment adhering to the inner wall of the compressor 1. These deposits are then drawn out of the compressor 1 with the airflow generated by the vacuum pump 6, significantly improving the removal rate of residual liquid. The vibration frequency of the eccentric motor can be adjusted using variable frequency control to suit the specific compressor 1 structure and residual content.

[0030] The working process of this embodiment is as follows: First, firmly connect the first pipe 2 and the second pipe 3 to the high-pressure and low-pressure valve interfaces of the compressor 1, respectively, and confirm that the stop valve 5 is in the closed state. Open the two stop valves 5, start the vacuum pump 6 to evacuate the interior of the compressor 1, and draw the residual refrigerant gas and the gas-liquid-solid mixture into the vacuum pump 6 through the pipe. Then, push it to the first-stage cyclone separator 81, where the pure gaseous refrigerant and the liquid-solid mixture are separated by centrifugal force. The pure gas enters the second-stage condenser 82, is condensed into liquid by the forced air-cooled heat sink fins, and then flows into the third-stage filter unit 83. The liquid-solid mixture also enters the third-stage filter unit 83, where solid impurities are intercepted by the built-in 50-100μm stainless steel filter. The uncondensed gaseous refrigerant enters the gas recovery tank and is purified by the activated carbon adsorption layer. At the same time, the vibration mechanism 9 vibrates the outer shell of the compressor 1, and the residual liquid mixture inside is shaken off and enters the recovery system with the airflow. After a certain period of vacuuming, observe the readings on pressure gauge 4. When both the high- and low-pressure side pressures are close to -0.1 MPa (approximately equal to absolute vacuum), the gas in compressor 1 has been essentially exhausted. At this point, turn off vacuum pump 6 and vibration mechanism 9, then close both stop valves 5 and disconnect the connecting pipes, completing the refrigerant extraction process.

[0031] After the extraction is completed, each recovery container 7 can be processed separately. The liquid in the liquid refrigerant recovery tank can be released through the valve and collected in a special liquid storage cylinder for subsequent recycling; the gas in the gaseous refrigerant recovery tank can be directly emptied or collected separately after purification by activated carbon adsorption; the residue in the solid impurity collection box is properly disposed of as hazardous waste.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An air-conditioning compressor refrigerant extraction device, characterized in that: include: Connecting pipe assembly: including a first pipe and a second pipe, respectively used to connect to the high-pressure port and the low-pressure port of the compressor; the first pipe and the second pipe are each provided with a pressure gauge for monitoring the pressure in the pipe and the inner cavity of the compressor during the extraction process; A vacuum collection mechanism, wherein the other ends of the first pipe and the second pipe are connected to the vacuum collection mechanism; the vacuum collection mechanism includes a vacuum pump, a recovery container, and a gas-liquid-solid separation component. The vacuum pump is used to vacuum the interior of the compressor to extract residual refrigerant. The gas-liquid-solid separation component is arranged on the flow path between the vacuum pump and the recovery container, and is used to separate gas, liquid and solid impurities and guide them to the recovery container. Vibration mechanism: The vibration mechanism is detachably connected to the outside of the compressor through a magnetic snap structure, and is used to apply vibration to the compressor during the vacuuming process to cause the oil film-like mixture attached to the inner wall of the compressor to fall off and be discharged with the airflow.

2. The air-conditioning compressor refrigerant extraction device according to claim 1, characterized in that: The first pipeline and the second pipeline are respectively provided with a stop valve for controlling the on and off of the pipeline; the stop valve opens after the compressor is connected and closes after the vacuuming is completed, so as to isolate the compressor from the subsequent pipeline.

3. The air-conditioning compressor refrigerant extraction device according to claim 2, characterized in that: The first pipe and the second pipe are both double-layer metal hoses, with the inner layer being a stainless steel bellows and the outer layer being a braided steel mesh.

4. The air-conditioning compressor refrigerant extraction device according to claim 1, characterized in that: The vibration mechanism is provided with an eccentric motor mounted on a fixed bracket of the compressor. The eccentric motor is rigidly adsorbed on the surface of the compressor casing through a magnetic base, driving the compressor to generate 20-100 Hz mechanical vibration.

5. The air-conditioning compressor refrigerant extraction device according to claim 4, characterized in that: The eccentric wheel motor has a frequency conversion control function.

6. The air-conditioning compressor refrigerant extraction device according to claim 1, characterized in that: The recovery container consists of a gaseous refrigerant recovery tank, a liquid refrigerant recovery tank and a solid impurity collection box, and the gas outlet, liquid outlet and solid outlet of the gas-liquid-solid separation component are respectively connected to the corresponding recovery tank or collection box.

7. The air-conditioning compressor refrigerant extraction device according to claim 6, characterized in that: An activated carbon adsorption layer is provided in the gaseous refrigerant recovery tank for adsorbing odor and small molecular impurities in the gaseous refrigerant.

8. The air-conditioning compressor refrigerant extraction device according to claim 6, characterized in that: A liquid level sensor is provided at the bottom of the liquid refrigerant recovery tank, and the liquid level sensor is electrically connected to the control circuit of the vacuum pump. When the liquid level reaches a preset threshold, an alarm signal is triggered and the vacuum operation is automatically stopped.

9. The air-conditioning compressor refrigerant extraction device according to claim 6, characterized in that: The gas-liquid-solid separation component comprises: A first-stage cyclone separator, whose mixing inlet is connected to the vacuum pump outlet, is used to centrifugally separate the gas-liquid-solid mixture into pure gas and a liquid-solid mixture, wherein the pure gas is output through the gas outlet and the liquid-solid mixture is output through the solid-liquid outlet; The gas inlet of the secondary condenser is connected to the gas outlet of the primary cyclone separator, and the tube wall is provided with forced air cooling fins to condense the pure gas into liquid; The three-stage filtration unit has a liquid inlet connected to the liquid outlet of the secondary condenser, and a solid inlet connected to the solid-liquid outlet of the first-stage cyclone separator. It has a built-in 50-100μm stainless steel filter to intercept solid particles in the liquid flow.

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