Explosion-proof refrigerant recovery device

Abstract

This invention discloses an explosion-proof refrigerant recovery device, comprising an explosion-proof enclosure, a storage tank for storing refrigerant located inside the lower side of the enclosure, a compressor for pumping refrigerant into the storage tank located inside the upper side of the enclosure, and a rotating filter element located outside the other side of the enclosure. The output end of the rotating filter element is connected to a conveying component, and the output end of the conveying component is connected to the suction end of the compressor. A rotating assembly structure using a bearing ring and bearing column is employed. Multiple sets of bearing tanks arranged in a ring around the bearing column enable rapid switching of filtration stations, allowing for filter replacement without stopping or disassembling the system, thus maintaining the overall continuity of the refrigeration system. Furthermore, the bearing tanks are equipped with a double-layer filter to perform graded filtration and purification of the refrigerant, effectively intercepting various impurities and contaminants mixed in the refrigerant and protecting the downstream compressor and circulation pipeline from wear and blockage caused by impurities.

Description

Technical Field

[0001] This invention belongs to the technical field of refrigerant recovery devices, specifically relating to an explosion-proof refrigerant recovery device. Background Technology

[0002] Refrigerant recovery units are key equipment in the commissioning process of refrigerant production lines. They are used to safely and efficiently transfer refrigerant from the system to a recovery container, avoiding direct discharge that would cause environmental pollution and resource waste. Their basic working principle involves establishing negative pressure within the recovery container using a compressor (or vacuum pump), and then using the pressure difference to extract the refrigerant from the system to be recovered. After condensation, filtration, and drying, the refrigerant is stored.

[0003] The refrigerant recovery equipment with announcement number CN222799342U has the following technical issues: the refrigerant recovery equipment requires a filter screen. In some existing refrigerant recovery equipment, the installation position of the filter screen is fixed. When the filter screen is damaged and cannot filter the refrigerant waste liquid, some tools are needed to disassemble and replace the filter screen. In the process of disassembly, other parts in the equipment may be damaged, which is time-consuming and laborious.

[0004] As can be seen from the technical problems in the aforementioned patent documents, refrigerant recovery equipment requires the use of filters. In existing refrigerant recovery equipment, the installation position of the filters is fixed. When the filters are damaged and cannot filter the refrigerant waste liquid, some tools are needed to disassemble and replace the filters. During the disassembly process, other parts in the equipment may also be damaged, which is time-consuming and laborious. Summary of the Invention

[0005] The purpose of this invention is to provide an explosion-proof refrigerant recovery device to solve the technical problems of inconvenient replacement of filter consumables in existing refrigerant recovery equipment, poor sealing and filter failure caused by deviation in the work station switching position during the recovery process, and easy loosening and detachment of the docking seal due to force misalignment.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An explosion-proof refrigerant recovery device includes an explosion-proof enclosure. A storage tank for storing refrigerant is located inside the lower side of the enclosure. A compressor for pumping refrigerant into the storage tank is located inside the upper side of the enclosure. A rotating filter element is located outside the other side of the enclosure. The output end of the rotating filter element is connected to a conveying component, and the output end of the conveying component is connected to the suction end of the compressor. The input end of the rotating filter element is connected to a connector for connecting pipes.

[0008] As a further embodiment of the present invention, the rotating filter element includes a bearing ring fixedly connected to the inner wall of the other side of the explosion-proof enclosure. The bearing ring is rotatably fitted with a bearing column. The end of the bearing column is provided with multiple sets of mounting holes arranged in a ring. Each set of mounting holes is threadedly connected to a bearing tank. The bearing tank is provided with a first filter layer and a second filter layer from the outside to the inside. The two ends of the bearing tank are respectively provided with connecting holes. The bearing tank located at the bottom of the explosion-proof enclosure is provided with sealing tubes on both the front and rear sides. The opposite ends of the two sets of sealing tubes are respectively connected to the conveying component and the connecting component through a flexible connecting component. The lower part of the other side of the explosion-proof enclosure is provided with a pushing component for driving the two sets of sealing tubes to move synchronously and insert into the connecting holes at both ends of the bottom bearing tank.

[0009] A window is provided on the other side of the explosion-proof enclosure's outer surface, above the support column.

[0010] The outer end of the support column and the outer side of each set of mounting holes are provided with positioning grooves, and a pointer for pointing to one of the positioning grooves is fixedly connected to the top of the other side of the explosion-proof enclosure.

[0011] As a further embodiment of the present invention, the pusher includes a support frame fixedly connected to the inner wall of the other side of the explosion-proof enclosure. A support ring is fixedly connected to the top of the support frame. A bidirectional lead screw is rotatably connected inside the support ring. The outer end of the bidirectional lead screw extends outward through the explosion-proof enclosure. Two threaded seats are symmetrically threaded onto the bidirectional lead screw. Push plates are fixedly connected to the top of the two sets of threaded seats respectively. Insertion pipes are fixedly connected to the top of the two sets of push plates respectively. The opposite ends of the two sets of insertion pipes are respectively connected to the ends of the corresponding side sealing insertion pipes. A fixing member for fixing the bidirectional lead screw is provided at the outer end of the bidirectional lead screw.

[0012] As a further embodiment of the present invention, the fixing member includes a stabilizing tube rotatably sleeved on the outer end of the bidirectional lead screw, the bottom of the stabilizing tube being fixedly connected to the outer surface of the explosion-proof housing, and the tube wall of the stabilizing tube being threaded with an abutment bolt, the screw of the abutment bolt being screwed upward and abutting against the end of the bidirectional lead screw.

[0013] As a further embodiment of the present invention, the connector includes a U-shaped plate fixedly connected to the outer surface of the other side of the explosion-proof enclosure, a U-shaped groove is opened on the inner side of the U-shaped plate, an extraction tube is provided inside the U-shaped groove, one end of the extraction tube is connected to a flexible connecting member on the corresponding side, the other end of the extraction tube is connected to a sealing connector for connecting a refrigerant conduit, and a pressing member is provided inside the U-shaped plate for pressing the extraction tube into the U-shaped groove.

[0014] As a further preferred embodiment of the present invention, the sealing connector includes a connecting pipe connected to the other end of the extraction pipe, one end of the connecting pipe being connected to a sleeve, the inner wall of the sleeve being provided with an airbag ring, the top of the sleeve being connected to a four-way pipe, the lower end of the four-way pipe being connected to the interior of the airbag ring, the left and right ends of the four-way pipe being threadedly connected to a pressure gauge and a pressure relief valve respectively, and the top of the four-way pipe being threadedly connected to a pressure ball that pumps gas into the airbag ring.

[0015] A limiting ring is slidably fitted at the other end of the extraction tube. The bottom of the limiting ring is fixedly connected to the surface of the U-shaped plate, and a crimping bolt is threaded to the top of the limiting ring. The screw of the crimping bolt threads downward through the limiting ring and crimps to the end of the extraction tube.

[0016] As a further preferred embodiment of the present invention, the pressing component includes a bearing strip fixedly connected to the front side of the U-shaped plate, a double-sided rack slidably connected to the middle of the rear side of the bearing strip, gears meshing on both sides of the double-sided rack, the front axles of the two sets of gears rotatingly engaging with the front side of the bearing strip, linkage plates fixedly connected to the bottom of the two sets of gears, the outer ends of the two sets of linkage plates tilting outward and fixedly connected to pressing plates adapted to the interior of the U-shaped plate, and a reset component for driving the double-sided rack to reset on the surface of the rack.

[0017] The reset component includes a sliding hole on the front side of the double-sided rack, a guide rod is fixedly connected inside the sliding hole, a guide plate is slidably fitted on the surface of the guide rod, the front side of the guide plate is fixedly connected to the top of the bearing bar, and a push spring is sleeved on the surface of the guide rod located on the upper side of the guide plate, with the two ends of the push spring abutting against the top of the guide plate and the top inner wall of the sliding hole, respectively.

[0018] As a further preferred embodiment of the present invention, the conveying component includes a spiral coil disposed in the upper inner cavity of the explosion-proof housing, an installation ring is sleeved on the outer circumferential surface of the spiral coil, a fan is fixedly connected to the bottom of the installation ring, one end of the spiral coil is connected to one of the flexible connecting parts, and the other end of the spiral coil is connected to the suction end of the compressor.

[0019] As a further preferred embodiment of the present invention, the flexible connector includes a first flexible tube and a second flexible tube. One end of the first flexible tube is connected to a sealing tube located inside the chassis, and the other end is connected to the input end of the spiral coil through a first solenoid valve. One end of the second flexible tube is connected to a sealing tube located outside the chassis, and the other end is connected to one end of the extraction tube through a second solenoid valve.

[0020] This invention also provides an explosion-proof refrigerant recovery process, comprising the following steps:

[0021] The storage tank inside the lower part of the explosion-proof enclosure is a core component, specifically designed for the routine storage of refrigerant media required for refrigeration operations. It provides a source of media reserves for the entire refrigeration cycle and filtration purification process. The compressor installed inside the upper part of the explosion-proof enclosure serves as the core power equipment for refrigerant circulation pumping, continuously providing negative pressure suction and pressure delivery power for the overall refrigerant circulation. The compressor's suction end is stably connected to the rotating filter element through a conveying component, while the rotating filter element's input end is connected to an external refrigerant guide pipe through a connector, forming a complete closed-loop path for refrigerant to enter from the outside, be filtered and purified, be pumped, and be recycled. All core power and liquid storage structures are built inside the explosion-proof enclosure, relying on the enclosure shell to isolate the external flammable and explosive working environment and avoid safety risks caused by electrical and media operation.

[0022] S2. The core operation of refrigerant filtration and purification is completed by a rotating filter component. This component uses a bearing ring fixed to the inner wall of the other side of the explosion-proof enclosure as a fixed base. The bearing ring is equipped with a rotating bearing column as the bearing base for the filter consumables. Multiple sets of mounting holes are arranged in a ring at the end of the bearing column. Each set of mounting holes is threaded with an independent bearing can as the carrier of the core filter consumables. All bearing cans can rotate synchronously with the bearing column to switch working positions.

[0023] S3. Each carrier tank has a two-stage filtration structure with a first filter layer and a second filter layer inside. This structure can sequentially intercept impurities, remove particulate matter, and purify the refrigerant medium as it flows through. It effectively removes solid impurities, oil stains, and various debris mixed in during the refrigerant operation, preventing impurities from entering the compressor and circulation pipeline, which could cause equipment wear, pipeline blockage, and reduced refrigeration efficiency.

[0024] S4. Both ends of the carrier tank are reserved with connecting holes as medium inlet and outlet channels. Inside the explosion-proof enclosure, for the carrier tank located at the bottom working position, sealed inserts are arranged on the front and rear sides as medium docking and conduction components. The two sets of sealed inserts are connected to the conveying component and the connecting component respectively through flexible connecting parts to form a medium sealing and filtration passage for the carrier tank at the working position.

[0025] S5. During normal filtration operation, the connecting holes at both ends of the carrier tank at the bottom working position are precisely inserted and sealed with the sealing pipes on both sides. The external refrigerant enters the carrier tank through the connector, the corresponding flexible connector, and the sealing pipe on one side. After being fully purified by two-stage filtration layers, it is then guided to the compressor suction end through the sealing pipe on the other side, the corresponding flexible connector, and the conveying component. After being pressurized and pumped by the compressor, it is delivered to the subsequent refrigeration cycle and the liquid storage tank, completing the continuous clean filtration cycle of the refrigerant.

[0026] S6. When the filter layer inside the carrier tank in the working position is saturated with impurities and the filtration efficiency decreases, there is no need to disassemble the overall sealing structure of the explosion-proof enclosure. Instead, the two sets of sealing tubes are driven to move synchronously in opposite directions by the pusher at the lower part of the other side of the explosion-proof enclosure, so that the sealing tubes are pulled out from the connecting holes at both ends of the current working carrier tank, thus releasing the medium sealing connection state of the current filtration position.

[0027] S7. Subsequently, the operator manually rotates the support column through the window on the upper part of the other side of the explosion-proof enclosure to complete the filter station rotation. During the rotation of the support column, the positioning grooves on the outer end corresponding to the outer side of each set of mounting holes are used for alignment calibration in conjunction with the pointer fixed on the top of the other side of the explosion-proof enclosure. The brand-new, unused support tank is accurately rotated to the bottom standard working position to ensure the accuracy of the station switching and avoid the alignment deviation from affecting the subsequent sealing and docking effect.

[0028] After the S8 station is accurately switched, the pusher is operated again to drive the two sets of sealing tubes to move synchronously relative to each other, so that the sealing tubes are reinserted into the connecting holes at both ends of the new station carrier tank, restoring the medium sealing and filtration conduction state, and the refrigerant filtration cycle can be quickly restarted. The replaced saturated carrier tank can be disassembled and maintained or replaced separately in the future. The entire operation and maintenance is convenient and efficient, and does not damage the explosion-proof protection structure of the chassis.

[0029] S9. The power control and position locking of the rotating filter element station switching and sealing docking operation are achieved by the matching pusher and fixing parts. The pusher is supported by a support frame fixed to the inner wall of the explosion-proof enclosure. The support ring at the top of the support frame provides rotational assembly support for the bidirectional screw. The end of the bidirectional screw extends outward through the explosion-proof enclosure for easy external manual operation. Two sets of threaded seats are symmetrically mounted on the surface of the bidirectional screw. Relying on the positive and negative thread structure of the bidirectional screw, the screw can drive the two sets of threaded seats to move synchronously in opposite directions or linearly. The threaded seats are connected and fixed to the sealing insertion tube through the top push plate and the insertion tube, thereby synchronously driving the two sets of sealing insertion tubes to complete the insertion and removal actions. After the sealing tube is positioned, the position is locked and positioned by the fixing component mounted on the outer end of the double-acting screw. The fixing component relies on the stabilizing tube fixedly connected to the explosion-proof enclosure as a base. By tightening the abutment bolts on the wall of the stabilizing tube, the end of the bolt thread tightly abuts the end of the double-acting screw. The rotation angle of the double-acting screw is locked by mechanical abutment friction, which prevents the screw from rotating and the sealing tube from shifting due to equipment vibration. This avoids problems such as failure of medium connection seal and refrigerant leakage, and ensures the operational stability of the filtration station after connection.

[0030] S10. The sealing operation of the external refrigerant pipeline of the system is achieved by the connector as a whole. The connector uses the U-shaped plate fixed on the outside of the explosion-proof enclosure as the installation base. The U-shaped groove opened on the inside of the U-shaped plate is used to limit the placement of the extraction pipe. One end of the extraction pipe is connected to the sealing insertion pipe through the flexible connector, and the other end is connected to the external refrigerant conduit through the sealing connector to achieve stable introduction of external refrigerant medium.

[0031] S11. After the extraction tube is placed inside the U-shaped groove, the extraction tube is firmly pressed and limited inside the U-shaped groove by the press-in component to avoid loosening and leakage caused by shaking and displacement during pipeline operation, and to ensure the stability of the medium transportation docking structure.

[0032] S12. The sealing connector serves as the core sealing and docking structure for the external refrigerant conduit. It connects the conduit with a connecting pipe and a sleeve pipe. An airbag ring is installed on the inner wall of the sleeve pipe as an adaptive sealing component. A pressure gauge, a pressure relief valve, and a pressure ball are connected through a four-way pipe. During operation, gas is pumped into the airbag ring by pressing the pressure ball, causing the airbag ring to inflate and expand, tightly fitting the outer wall of the external refrigerant conduit to achieve a complete seal at the pipe docking point. The pressure gauge monitors the inflation pressure inside the airbag ring in real time to ensure that the sealing inflation pressure is within the appropriate range. The pressure relief valve can automatically release pressure when the pressure exceeds the limit, avoiding the problem of airbag ring rupture due to overpressure.

[0033] S13. Simultaneously, the end of the extraction pipe is equipped with a limiting ring and a crimping bolt. By tightening the crimping bolt, the extraction pipe connection position is further reinforced to prevent the pipe connection from loosening or shifting. The multi-seal protection structure is suitable for leak-free operation under explosion-proof conditions.

[0034] S14. The press-in part inside the connector serves as the core structure for limiting and fixing the extraction tube. It uses the bearing strip as the fixing base and forms a linkage pressing structure through the double-sided rack, meshing gears on both sides, linkage plate, and pressing plate. The pressing structure is automatically reset by the reset part. During operation, the double-sided rack is moved to drive the gears on both sides to rotate synchronously. The gears drive the two sets of pressing plates to press down synchronously through the linkage plate, tightly pressing and fixing the extraction tube inside the U-shaped groove, thus completing the pipeline limiting and fixing.

[0035] S15. The reset component relies on the guide rod, guide plate and push spring to automatically reset the double-sided rack and the whole pressing structure by pushing the spring force after the pressing and fixing operation is completed. This facilitates the subsequent disassembly and maintenance of the extraction tube and pipeline replacement, and takes into account both the stability of the fixation and the convenience of disassembly and assembly.

[0036] S16. The heat exchange and flow guidance of the refrigerant after filtration and purification is completed by the conveying component. The conveying component uses a spiral coil arranged in the upper inner cavity of the explosion-proof enclosure as the core conveying pipeline. The spiral coil is equipped with an installation ring and a bottom fan. After filtration and purification, the refrigerant flows through the spiral coil and is conveyed to the compressor suction end. The operation of the fan can perform auxiliary heat exchange and temperature regulation on the refrigerant flowing inside the spiral coil, optimize the refrigerant circulation operating temperature, and avoid abnormal refrigerant temperature affecting the compressor operating conditions and overall cooling effect. The spiral coil structure can extend the refrigerant flow heat exchange path, improve the auxiliary heat exchange operation effect, and ensure the stability of the refrigerant operating conditions during the conveying process.

[0037] S17. The flexible connecting component serves as a flexible buffer and connecting transition component between various rigid pipeline structures. It consists of a first flexible hose, a second flexible hose, and corresponding solenoid valves. The first flexible hose connects the inner sealing tube of the chassis to the input end of the spiral coil of the conveying component. The second flexible hose connects the outer sealing tube of the chassis to the extraction tube of the connecting component. The two sets of solenoid valves respectively control the on / off state of the two medium connecting pipelines.

[0038] S18. The solenoid valve can precisely control the opening and closing of the refrigerant filtration circulation pipeline. During filtration station switching, pipeline maintenance and repair, and equipment start-up and shutdown, the medium passage can be cut off in time to prevent refrigerant leakage, pipeline cross-pressure and medium backflow. At the same time, the flexible hose can buffer the pipeline stress caused by equipment operation vibration and avoid the defects of rigid connection of rigid pipeline that is prone to cracking and damage, further improving the operational safety and service life of the entire explosion-proof filtration and circulation system.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. This device employs a rotating assembly structure with a bearing ring and bearing column, enabling rapid switching between filtration stations by utilizing multiple bearing tanks arranged in a ring around the bearing column. Filter replacement can be completed without stopping or disassembling the system, ensuring the continuity of the entire refrigeration system's operation. Furthermore, the bearing tank features a double-layer filter, capable of graded filtration and purification of the refrigerant, effectively intercepting various impurities and contaminants within the refrigerant. This protects the downstream compressor and circulation pipeline from wear and blockage caused by impurities, extending the equipment's lifespan. The connection method, where the sealed insert connects to the end of the bearing tank via a connecting hole, ensures excellent media sealing, minimizing refrigerant leakage and cross-contamination during operation. A window allows operators to directly observe the internal bearing tank conditions and switching operations. The positioning groove and pointer work together to achieve precise alignment of the rotating bearing column, ensuring accurate docking positions after station switching and preventing misalignment that could lead to poor sealing or filter failure, significantly reducing the difficulty of filter maintenance.

[0041] 2. This device uses a support frame and support ring as a fixed support foundation, resulting in high structural strength and minimizing the risk of shaking or deformation during operation and adjustment. Furthermore, the externally mounted bidirectional screw design, penetrating the casing, allows for direct manual operation and adjustment from outside the explosion-proof enclosure without requiring the enclosure to be opened and damaging the explosion-proof sealing structure. Simultaneously, leveraging the forward and reverse thread transmission characteristics of the bidirectional screw, it can synchronously drive two sets of threaded seats, the top push plate, and the insertion pipe to move symmetrically in opposite directions. This drives the sealing insertion pipes on both sides to simultaneously complete the insertion and separation actions. The synchronization of the adjustment actions on both sides is strong, preventing single-sided misalignment or uneven force. The overall mechanical transmission structure is simple and reliable, and the adjustment operation is labor-saving and convenient. It can quickly switch the sealing on / off of the filtration station, adapting to the rapid operation requirements of filter consumable replacement, and ensuring the stability of pipeline connections and the sealing of media flow.

[0042] 3. This device employs a sleeve-type tube combined with an inflatable ring for sealing. It adaptively fits and seals according to the specifications of the external conduit, offering strong sealing adaptability and excellent sealing performance after connection. This effectively prevents refrigerant leakage and pressure loss at pipe joints. Furthermore, each of the four-way pipes is equipped with a pressure bulb, pressure gauge, and pressure relief valve, allowing for manual or automatic inflation and pressurization of the inflatable ring. Real-time monitoring of the sealing pressure is implemented, and automatic pressure relief is activated to prevent the inflatable ring from rupturing due to overpressure, ensuring long-term stable operation of the sealing structure. Simultaneously, the limiting ring and crimping bolts work together to provide secondary crimping and reinforcement at the end of the extraction tube, preventing force displacement, loosening, or detachment at the pipe joint. This multi-layered sealing reinforcement structure provides a high overall sealing protection level, making it suitable for use in high-risk explosion-proof environments, significantly improving safety and sealing reliability. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the load-bearing column in an embodiment of the present invention;

[0047] Figure 4 This is a cross-sectional structural diagram of the load-bearing column in an embodiment of the present invention;

[0048] Figure 5This is a schematic diagram of the U-shaped plate in an embodiment of the present invention;

[0049] Figure 6 This is a magnified structural diagram of point A in Figure 5.

[0050] Figure label:

[0051] 100. Explosion-proof enclosure; 101. First flexible hose; 102. Fan; 103. Spiral coil; 104. Mounting ring; 105. Connecting pipe; 106. Compressor; 107. Delivery pipe; 108. Storage tank;

[0052] 200. Support column; 201. Support tank; 202. Positioning groove; 203. Pointer; 205. Support ring; 206. Window;

[0053] 300. Support frame; 301. Abutment bolt; 303. Stabilizing tube; 304. Double-acting screw; 305. Threaded seat; 306. Push plate; 307. Second flexible hose; 308. Solenoid valve; 309. Insertion tube; 310. Sealing insertion tube; 311. Hexagonal groove; 312. Connecting hole;

[0054] 400. U-shaped plate; 401. U-shaped groove; 402. Pressing plate; 403. Gear; 404. Linkage plate; 405. Guide plate; 406. Double-sided rack; 407. Sliding hole; 408. Push spring; 409. Guide rod;

[0055] 500. Connecting pipe; 501. Pressure relief valve; 502. Pressure ball; 503. Pressure gauge; 504. Four-way pipe; 505. Sleeve pipe; 506. Airbag ring;

[0056] 601. Extraction tube; 602. Limiting ring; 603. Crimping bolt. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0058] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0059] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0060] See appendix Figure 1-6 As shown in the figure, an explosion-proof refrigerant recovery device according to an embodiment of the present invention includes an explosion-proof enclosure 100. A storage tank 108 for storing refrigerant is disposed inside the lower side of the explosion-proof enclosure 100. A compressor 106 for pumping refrigerant into the storage tank 108 is disposed inside the upper side of the explosion-proof enclosure 100. A rotating filter element is disposed outside the other side of the explosion-proof enclosure 100. The output end of the rotating filter element is connected to a conveying element. The output end of the conveying element is connected to the suction end of the compressor 106. The input end of the rotating filter element is connected to a connector for connecting pipe 105.

[0061] The rotating filter element includes a bearing ring 205 fixedly connected to the inner wall of the other side of the explosion-proof housing 100. A bearing column 200 is rotatably fitted inside the bearing ring 205. The end of the bearing column 200 is provided with multiple sets of mounting holes arranged in a ring. Each set of mounting holes is threadedly connected to a bearing tank 201. The bearing tank 201 is provided with a first filter layer and a second filter layer from the outside to the inside. Both ends of the bearing tank 201 are provided with connecting holes 312. The bearing tank 201 located at the bottom inside the explosion-proof housing 100 is provided with sealing tubes 310 on both the front and rear sides. The opposite ends of the two sets of sealing tubes 310 are connected to the conveying component and the connecting component through flexible connecting components. The lower part of the other side of the explosion-proof housing 100 is provided with a pushing component for driving the two sets of sealing tubes 310 to move synchronously and insert into the connecting holes 312 at both ends of the bottom bearing tank 201.

[0062] A window 206 is provided on the other outer surface of the explosion-proof enclosure 100 and on the upper side of the support column 200.

[0063] A positioning groove 202 is provided at the outer end of the support column 200 and on the outer side of each set of mounting holes. A pointer 203 is fixedly connected to the top of the other side of the explosion-proof enclosure 100 to point to one of the positioning grooves 202. By adopting the support ring 205 in conjunction with the rotating assembly structure of the support column 200, multiple sets of support tanks 201 arranged in a ring around the support column 200 can be used to quickly switch the filtration station. The filter material replacement can be completed without stopping and disassembling the machine, without affecting the overall continuous operation of the refrigeration system. In addition, the support tank 201 is equipped with a double-layer filter layer, which can perform graded filtration and purification of the refrigerant, and fully intercept various impurities and contaminants mixed in the refrigerant. This design effectively protects the downstream compressor 106 and circulation pipeline from wear and blockage caused by impurities, extending the service life of the equipment. Simultaneously, the insertion and connection method between the sealing tube 310 and the end connection hole 312 of the carrier tank 201 ensures good medium sealing, reducing the likelihood of refrigerant leakage or cross-contamination during operation. The accompanying window 206 allows operators to directly observe the internal condition of the carrier tank 201 and perform rotation operations. The positioning groove 202 and pointer 203 work together to achieve precise alignment and calibration of the carrier column 200, ensuring accurate docking position after station switching and preventing misalignment from causing poor sealing or filter failure, significantly reducing the difficulty of filter maintenance.

[0064] The first filter layer is a sintered metal mesh, mainly used to intercept solid particles in the refrigerant; the second filter layer is a filter element filled with desiccant and adsorbent, used to adsorb moisture and acidic substances in the refrigerant.

[0065] The outer connecting hole 312 has a hexagonal groove 311 for connecting tools.

[0066] The pushing component includes a support frame 300 fixedly connected to the inner wall of the other side of the explosion-proof enclosure 100. A support ring is fixedly connected to the top of the support frame 300, and a double-acting screw 304 is rotatably connected inside the support ring. The outer end of the double-acting screw 304 extends outward through the explosion-proof enclosure 100. Two threaded seats 305 are symmetrically threaded onto the double-acting screw 304. Push plates 306 are fixedly connected to the top of the two sets of threaded seats 305 respectively. Insertion tubes 309 are fixedly connected to the top of the two sets of push plates 306 respectively. The opposite ends of the two sets of insertion tubes 309 are respectively connected to the ends of the corresponding side sealing insertion tubes 310. A fixing member for fixing the double-acting screw 304 is provided on the outer end of the double-acting screw 304. The support frame 300 and the support ring serve as the fixed support foundation, resulting in high structural support strength and preventing damage during operation and adjustment. It is prone to shaking and deformation. Furthermore, the design of the bidirectional lead screw 304 externally penetrating the casing allows operators to directly and manually control and adjust it from outside the explosion-proof casing 100 without opening the casing and damaging the explosion-proof sealing structure. At the same time, relying on the forward and reverse thread transmission characteristics of the bidirectional lead screw 304, it can simultaneously drive the two sets of thread seats 305, the top push plate 306, and the insertion tube 309 to move symmetrically in opposite directions or in opposite directions, thereby driving the two sealing insertion tubes 310 on both sides to simultaneously complete the insertion and separation actions. The adjustment actions on both sides are highly synchronized, and there will be no situation of single-sided docking offset or uneven force. Moreover, the overall mechanical transmission structure is simple and reliable, and the adjustment operation is labor-saving and convenient. It can quickly complete the on / off switching of the filter station seal, adapt to the rapid operation requirements of filter consumable replacement, and ensure the stability of pipeline docking and the sealing of media flow.

[0067] The fixing component includes a stabilizing tube 303 rotatably sleeved on the outer end of the bidirectional lead screw 304. The bottom of the stabilizing tube 303 is fixedly connected to the outer surface of the explosion-proof enclosure 100. The tube wall of the stabilizing tube 303 is threaded with an abutment bolt 301. The screw of the abutment bolt 301 is screwed upward and abuts against the end of the bidirectional lead screw 304. The stabilizing tube 303 fixes the screw to the outside of the explosion-proof enclosure 100, providing stable rotational support and a limiting base for the end of the bidirectional lead screw 304, reducing radial sway and offset during long-term operation. Furthermore, the abutment bolt 301 tightens to abut against the bidirectional lead screw 304. The locking method at the end of the lead screw 304 is simple and convenient, requiring no additional complex locking accessories. After locking, the rotation angle of the bidirectional lead screw 304 can be firmly locked by mechanical friction, effectively preventing the bidirectional lead screw 304 from loosening due to long-term vibration during equipment operation. This avoids displacement or disconnection of the sealing tube 310 and ensures that the connection position between the sealing tube 310 and the carrier tank 201 remains constant, maintaining the sealing state of the pipeline medium connection over a long period. This prevents refrigerant leakage, pipeline continuity failure, and other problems, improving the operational stability and durability of the entire filter connection structure.

[0068] The connector includes a U-shaped plate 400 fixedly connected to the outer surface of the other side of the explosion-proof enclosure 100. A U-shaped groove 401 is opened on the inner side of the U-shaped plate 400. An extraction tube 601 is arranged inside the U-shaped groove 401. One end of the extraction tube 601 is connected to a flexible connector on the corresponding side, and the other end of the extraction tube 601 is connected to a sealing connector for connecting a refrigerant conduit. A pressing component is provided inside the U-shaped plate 400 for pressing the extraction tube 601 into the U-shaped groove 401. By adopting the structure of U-shaped plate 400 and U-shaped groove 401, a stable placement and limiting installation foundation can be provided for the extraction tube 601. The extraction tube 601 is neatly arranged, and it is not easy for the pipeline to be messy or subjected to stress and pulling. The extraction pipe 601 is connected to a flexible connector at one end and a sealing connector at the other end, which can quickly achieve a stable connection between the external refrigerant conduit and the internal filter pipeline, ensuring smooth and unobstructed medium introduction. At the same time, the matching press-in component can firmly press and limit the extraction pipe 601 inside the U-shaped groove 401, effectively avoiding connection loosening and refrigerant leakage caused by pipeline shaking, displacement, or loosening during equipment operation. Furthermore, the overall external pipeline is easy to install and disassemble, with strong compatibility, meeting the pipeline sealing connection requirements under explosion-proof conditions, and facilitating subsequent pipeline maintenance, disassembly, and replacement operations, adapting to different site pipeline connection and installation needs.

[0069] The sealing connection includes a connecting pipe 500 connected to the other end of the extraction pipe 601. One end of the connecting pipe 500 is connected to a sleeve pipe 505. An airbag ring 506 is provided on the inner wall of the sleeve pipe 505. A four-way pipe 504 is connected to the top of the sleeve pipe 505. The lower end of the four-way pipe 504 is connected to the inside of the airbag ring 506. A pressure gauge 503 and a pressure relief valve 501 are threaded to the left and right ends of the four-way pipe 504, respectively. A pressure ball 502 that pumps gas into the airbag ring 506 is threaded to the top of the four-way pipe 504.

[0070] A limiting ring 602 is slidably fitted onto the other end of the extraction tube 601. The bottom of the limiting ring 602 is fixedly connected to the surface of the U-shaped plate 400, and a crimping bolt 603 is threaded onto the top of the limiting ring 602. The threaded rod of the crimping bolt 603 passes through the limiting ring 602 and is crimped onto the end of the extraction tube 601. By using the sleeve tube 505 in conjunction with the airbag ring 506 to form an inflatable sealing structure, it can adaptively fit and seal according to the specifications of the external conduit, resulting in strong sealing adaptability, good sealing effect after docking, and effectively preventing the appearance of gaps in the pipeline docking. To address refrigerant leakage and pressure relief issues, the four-way pipe 504 is equipped with a pressure ball 502, a pressure gauge 503, and a pressure relief valve 501. This allows for manual or automatic inflation and pressurization of the airbag ring 506, real-time monitoring of the sealing pressure, and automatic pressure relief to prevent overpressure damage and failure of the airbag ring 506, ensuring long-term stable operation of the sealing structure. Simultaneously, the limiting ring 602 and the crimping bolt 603 work together to provide secondary crimping and reinforcement of the extraction pipe 601 end, preventing force displacement, loosening, or detachment at the pipe connection. This multi-layered sealing reinforcement structure provides a high overall sealing protection level, making it suitable for use in explosion-proof and high-risk operating environments, significantly improving safety and sealing reliability.

[0071] The press-in component includes a support strip fixedly connected to the front side of the U-shaped plate 400. A double-sided rack 406 is slidably connected to the middle of the rear side of the support strip. Gears 403 are meshed on both sides of the double-sided rack 406. The front axles of the two sets of gears 403 are rotatably engaged with the front side of the support strip. Linkage plates 404 are fixedly connected to the bottom of the two sets of gears 403. The outer ends of the two sets of linkage plates 404 are inclined outward and fixedly connected to pressing plates 402 that are adapted to the interior of the U-shaped plate 400. The surface of the rack is provided with a reset component for driving the double-sided rack 406 to reset.

[0072] The reset component includes a sliding hole 407 on the front side of the double-sided rack 406. A guide rod 409 is fixedly connected inside the sliding hole 407. A guide plate 405 is slidably fitted on the surface of the guide rod 409. The front side of the guide plate 405 is fixedly connected to the top of the support bar. A push spring 408 is sleeved on the surface of the guide rod 409 located on the upper side of the guide plate 405. The two ends of the push spring 408 abut against the top of the guide plate 405 and the top inner wall of the sliding hole 407, respectively. Through the linkage transmission structure of the double-sided rack 406 meshing with the gear 403, the mechanical linkage is precise. Simply moving the rack can synchronously drive the two pressing plates 402 to press down synchronously, making the operation simple. Effortless operation allows a single person to quickly and easily complete the pressing and fixing of the extraction tube 601. Furthermore, the inclined design of the linkage plate 404 ensures even pressure distribution on the pressing plate 402, resulting in a tight and secure fit of the extraction tube 601. This provides excellent fixation and prevents pipe loosening or displacement during operation. Simultaneously, the matching reset component, relying on the guide rod 409, guide plate 405, and push spring 408, automatically resets and rebounds after the pressing operation, eliminating the need for manual adjustment. This facilitates quick disassembly, repair, and replacement of the extraction tube 601. Additionally, the overall structure is mechanically durable, resistant to jamming and damage, ensuring stable fixing over long-term use and high ease of maintenance.

[0073] The conveying component includes a spiral coil 103 disposed in the upper inner cavity of the explosion-proof enclosure 100. An mounting ring 104 is fitted around the outer circumference of the spiral coil 103. A fan 102 is fixedly connected to the bottom of the mounting ring 104. One end of the spiral coil 103 is connected to one set of flexible connecting parts, and the other end of the spiral coil 103 is connected to the suction end of the compressor 106. By using the spiral coil 103 as the refrigerant conveying pipe 107, the pipeline flow path is optimized, extending the refrigerant conveying heat exchange stroke and improving the refrigerant heat exchange and temperature regulation effect. Furthermore, the outer side of the coil... The matching installation ring 104 is securely fixed, and the bottom fan 102 can continuously provide auxiliary heat exchange, cooling and temperature regulation for the circulating refrigerant, stably controlling the refrigerant's operating temperature and preventing abnormal refrigerant temperature from affecting the pumping efficiency of the compressor 106 and the overall cooling effect. At the same time, the spiral coil 103 has a uniform heat exchange structure, smooth medium transportation, and the pipeline is not prone to dirt accumulation and blockage. It can not only stably deliver the filtered and purified refrigerant to the suction end of the compressor 106, but also optimize the overall operating conditions of the refrigeration cycle, improve the overall working efficiency of the refrigeration system, and ensure the long-term efficient operation of the equipment.

[0074] The flexible connector includes a first flexible hose 101 and a second flexible hose 307. One end of the first flexible hose 101 is connected to a sealed insert 310 located inside the chassis, and the other end is connected to the input end of the spiral coil 103 via a first solenoid valve 308. One end of the second flexible hose 307 is connected to the sealed insert 310 located outside the chassis, and the other end is connected to one end of the extraction tube 601 via a second solenoid valve 308. By using a combination structure of multiple hoses and solenoid valves 308, the flexible hoses can effectively buffer the pipe tension stress generated by equipment operation vibration, avoiding the cracking and damage that is common in rigid pipe connections. To address leakage issues, the system improves the vibration resistance of pipeline connections. Furthermore, two sets of solenoid valves 308 independently control the flow of internal and external media pipelines. This allows for precise cutting off or opening of the refrigerant flow pipeline according to different operating conditions such as equipment start-up, workstation switching, and maintenance. This effectively prevents safety issues such as pipeline cross-pressure, media backflow, and refrigerant leakage. At the same time, the flexible hoses have strong adaptability and can accommodate the misaligned installation requirements between the sealed insert 310 and the delivery and extraction pipes 601. The pipeline layout is highly adaptable, which improves the overall operational safety of the explosion-proof filtration and circulation system and reduces equipment failures and safety hazards.

[0075] The storage tank 108 inside the lower side of the explosion-proof enclosure 100 is a core component, specifically used for the routine storage of refrigerant media required for refrigeration operations. It provides a source of media reserves for the entire refrigeration cycle and filtration purification operation. The compressor 106 installed inside the upper side of the explosion-proof enclosure 100 serves as the core power equipment for refrigerant circulation pumping. It continuously provides negative pressure suction and pressure delivery power for the overall circulation of refrigerant. The suction end of the compressor 106 is stably connected to the rotating filter element through a conveying component. The input end of the rotating filter element is connected to an external refrigerant guide pipe through a connector, forming a complete closed-loop path for refrigerant to enter from the outside, be filtered and purified, be pumped, and be recycled. All core power and liquid storage structures are built inside the explosion-proof enclosure 100. The enclosure shell isolates the external flammable and explosive working environment, avoiding safety risks caused by electrical and media operation.

[0076] The core operation of refrigerant filtration and purification is completed by a rotating filter component. This component uses a support ring 205 fixed to the inner wall of the other side of the explosion-proof enclosure 100 as a fixed base. The support ring 205 is rotatably assembled with a support column 200 as the support base for the rotation of filter consumables. Multiple sets of mounting holes are arranged in a ring at the end of the support column 200. Each set of mounting holes is threaded with an independent support tank 201 as the carrier of the core filter consumables. All support tanks 201 can rotate synchronously with the support column 200 to switch working positions.

[0077] Each carrier tank 201 has a two-stage filtration structure with a first filtration layer and a second filtration layer inside. This structure can sequentially perform multi-stage impurity interception, particulate matter filtration, and media purification treatment on the refrigerant medium that flows through it. It effectively removes solid impurities, oil stains, and various debris mixed in during the operation of the refrigerant, and prevents impurities from entering the compressor 106 and the circulation pipeline, which could cause equipment wear, pipeline blockage, and reduced refrigeration efficiency.

[0078] Both ends of the carrier tank 201 are reserved with connecting holes 312 as medium inlet and outlet channels. Inside the explosion-proof enclosure 100, for the carrier tank 201 located at the bottom working position, sealing tubes 310 are arranged on the front and rear sides as medium docking and conduction components. The two sets of sealing tubes 310 are connected to the conveying component and the connecting component respectively through flexible connecting parts, forming a medium sealing and filtration passage for the carrier tank 201 at the working position.

[0079] During normal filtration operations, the connecting holes 312 at both ends of the carrier tank 201 at the bottom working position are precisely inserted and sealed with the sealing tubes 310 on both sides. External refrigerant enters the carrier tank 201 through the connector, the corresponding flexible connector, and the sealing tube 310 on one side. After being fully purified by two-stage filtration layers, it is then guided to the suction end of the compressor 106 through the sealing tube 310 on the other side, the corresponding flexible connector, and the conveying component. After being pressurized and pumped by the compressor 106, it is delivered to the subsequent refrigeration cycle and the liquid storage tank 108, completing the continuous clean filtration cycle of the refrigerant.

[0080] When the filter layer inside the carrier tank 201 in the working position becomes saturated with impurities and the filtration efficiency decreases, there is no need to disassemble the overall sealing structure of the explosion-proof enclosure 100. Instead, the two sets of sealing tubes 310 are driven to move synchronously in opposite directions by the pusher at the lower side of the explosion-proof enclosure 100, so that the sealing tubes 310 are pulled out from the connecting holes 312 at both ends of the current working carrier tank 201, thereby releasing the medium sealing connection state of the current filtration position.

[0081] Through the window 206 on the upper part of the other side of the explosion-proof enclosure 100, the support column 200 can be manually rotated to complete the filter station rotation. During the rotation of the support column 200, the positioning groove 202 corresponding to the outer side of each set of mounting holes is used for alignment calibration in conjunction with the pointer 203 fixed on the top of the other side of the explosion-proof enclosure 100. The brand-new unused support tank 201 is accurately rotated to the bottom standard working position to ensure the station switching accuracy and avoid the alignment deviation from affecting the subsequent sealing docking effect.

[0082] After the precise switching of workstations is completed, the pusher is operated again to drive the two sets of sealing tubes 310 to move synchronously relative to each other, so that the sealing tubes 310 are reinserted into the connecting holes 312 at both ends of the new workstation carrier tank 201, restoring the medium sealing and filtration conduction state, and the refrigerant filtration cycle can be quickly restarted. The replaced saturated carrier tank 201 can be disassembled and maintained or replaced separately in the future. The entire operation and maintenance is convenient and efficient, and does not damage the explosion-proof protection structure of the chassis.

[0083] The power control and position locking for the switching of rotating filter elements and sealing docking operations are achieved by a matching pusher and fixing components. The pusher is supported by a support frame 300 fixed to the inner wall of the explosion-proof enclosure 100. The support ring at the top of the support frame 300 provides rotational assembly support for the bidirectional lead screw 304. The end of the bidirectional lead screw 304 extends outward through the explosion-proof enclosure 100 for easy external manual operation. Two sets of threaded seats 305 are symmetrically mounted on the surface of the bidirectional lead screw 304. Relying on the forward and reverse thread structure of the bidirectional lead screw 304, the rotation of the lead screw can drive the two sets of threaded seats 305 to move synchronously in opposite directions or linearly in opposite directions. The threaded seats 305 are connected to the sealing insertion tube 310 via the top push plate 306 and the insertion tube 309. The connection should be fixed, thereby synchronously driving the two sets of sealing tubes 310 to complete the insertion and removal actions. After the position of the sealing tube 310 is adjusted to the correct position, the position is locked and positioned by the fixing component assembled on the outer end of the bidirectional screw 304. The fixing component relies on the stabilizing tube 303 fixedly connected to the explosion-proof enclosure 100 as a base. By screwing the abutment bolt 301 on the wall of the stabilizing tube 303, the end of the bolt screw is tightly abutted against the end of the bidirectional screw 304. The rotation angle of the bidirectional screw 304 is locked by mechanical abutment friction, which prevents the screw from rotating due to equipment vibration and the sealing tube 310 from shifting, avoiding the problem of media connection seal failure and refrigerant leakage, and ensuring the operational stability of the filtration station after connection.

[0084] The sealing operation of the external refrigerant pipeline is achieved by the connector as a whole. The connector uses the U-shaped plate 400 fixed on the outside of the explosion-proof enclosure 100 as the mounting base. The U-shaped groove 401 opened on the inner side of the U-shaped plate 400 is used to limit the placement of the extraction pipe 601. One end of the extraction pipe 601 is connected to the sealing insertion pipe 310 through the flexible connector, and the other end is connected to the external refrigerant conduit through the sealing connector to achieve stable introduction of external refrigerant medium.

[0085] After the extraction tube 601 is placed inside the U-shaped groove 401, the extraction tube 601 is firmly pressed and limited inside the U-shaped groove 401 by the press-in component, which avoids loosening and leakage caused by shaking and displacement during pipeline operation, and ensures the stability of the medium transportation docking structure.

[0086] The sealing connector, as the core sealing and docking structure of the external refrigerant conduit, uses the connecting pipe 500 and the sleeve pipe 505 as the main connecting pipes. The inner wall of the sleeve pipe 505 is equipped with an airbag ring 506 as an adaptive sealing component. Through the four-way pipe 504, a pressure gauge 503, a pressure relief valve 501, and a pressure ball 502 are respectively matched. During operation, gas is pumped into the airbag ring 506 by pressing the pressure ball 502, causing the airbag ring 506 to inflate and expand, tightly fitting the outer wall of the external refrigerant conduit, achieving a complete seal at the pipe docking point. The pressure gauge 503 monitors the internal inflation pressure of the airbag ring 506 in real time to ensure that the sealing inflation pressure is within the appropriate range. The pressure relief valve 501 can automatically release pressure when the pressure exceeds the standard, avoiding the problem of overpressure damage to the airbag ring 506.

[0087] Meanwhile, the extraction pipe 601 is equipped with a limiting ring 602 and a crimping bolt 603 at the end. By tightening the crimping bolt 603 to press down and limit the position, the connection position of the extraction pipe 601 is further reinforced to prevent the pipeline connection from loosening or shifting. The multi-seal protection structure is suitable for leak-free operation requirements under explosion-proof conditions.

[0088] The press-in component inside the connector serves as the core structure for limiting and fixing the extraction tube 601. With the bearing strip as the fixing base, a linkage pressing structure is formed by the double-sided rack 406, the meshing gears 403 on both sides, the linkage plate 404, and the pressing plate 402. The pressing structure is automatically reset by the reset component. During operation, the double-sided rack 406 is moved to drive the gears 403 on both sides to rotate synchronously. The gears 403 drive the two sets of pressing plates 402 to press down synchronously through the linkage plate 404, tightly pressing and fixing the extraction tube 601 inside the U-shaped groove 401, thus completing the pipeline limiting and fixing.

[0089] The reset component relies on the guide rod 409, guide plate 405 and push spring 408 to automatically reset the double-sided rack 406 and the overall pressing structure by pushing the spring 408 after the pressing and fixing operation is completed. This facilitates the subsequent disassembly and maintenance of the extraction tube 601 and pipeline replacement, taking into account both the stability of the fixation and the convenience of disassembly and assembly.

[0090] The refrigerant filtration and purification process is carried out by a conveying component, which uses a spiral coil 103 arranged in the upper inner cavity of the explosion-proof housing 100 as the core of the conveying pipes 107. The spiral coil 103 is equipped with a mounting ring 104 and a bottom fan 102. After filtration and purification, the refrigerant flows through the spiral coil 103 and is conveyed to the suction end of the compressor 106. The operation of the fan 102 can perform auxiliary heat exchange and temperature regulation on the refrigerant flowing inside the spiral coil 103, optimize the refrigerant circulation temperature, and avoid abnormal refrigerant temperature affecting the operating conditions of the compressor 106 and the overall cooling effect. The structure of the spiral coil 103 can extend the refrigerant flow heat exchange path, improve the auxiliary heat exchange effect, and ensure the stability of the refrigerant condition during the conveying process.

[0091] The flexible connector serves as a flexible buffer and transition component between various rigid pipeline structures. It consists of a first flexible hose 101, a second flexible hose 307, and a corresponding solenoid valve 308. The first flexible hose 101 connects the inner sealing tube 310 of the chassis to the input end of the conveying spiral coil 103. The second flexible hose 307 connects the outer sealing tube 310 of the chassis to the connecting extraction tube 601. The two sets of solenoid valves 308 respectively control the on / off state of the two medium connecting pipes 500.

[0092] The solenoid valve 308 can precisely control the opening and closing of the refrigerant filtration circulation pipeline. During filtration station switching, pipeline maintenance and repair, and equipment start-up and shutdown, it can promptly cut off the medium passage to prevent refrigerant leakage, pipeline cross-pressure, and medium backflow. At the same time, the flexible hose can buffer the pipeline stress caused by equipment operation vibration and avoid the defects of rigid connection of rigid pipeline that are prone to cracking and damage, further improving the operational safety and service life of the entire explosion-proof filtration and circulation system.

[0093] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. An explosion-proof refrigerant recovery device, characterized in that: The device includes an explosion-proof enclosure (100), with a storage tank (108) for storing refrigerant inside the lower side of the explosion-proof enclosure (100). A compressor (106) for pumping refrigerant into the storage tank (108) is installed inside the upper side of the explosion-proof enclosure (100). A rotating filter element is installed on the other side of the explosion-proof enclosure (100). The output end of the rotating filter element is connected to a conveying element. The output end of the conveying element is connected to the suction end of the compressor (106). The input end of the rotating filter element is connected to a connector for connecting pipe (105).

2. The explosion-proof refrigerant recovery device according to claim 1, characterized in that: The rotating filter element includes a support ring (205) fixedly connected to the inner wall of the other side of the explosion-proof enclosure (100). A support column (200) is rotatably fitted inside the support ring (205). Multiple sets of mounting holes arranged in a ring are provided at the ends of the support column (200). A support tank (201) is threaded into the interior of each set of mounting holes. A first filter layer and a second filter layer are sequentially arranged inside the support tank (201) from the outside in. The two ends of the support tank (201) are respectively... The explosion-proof enclosure (100) has a connecting hole (312). Both the front and rear sides of the bearing tank (201) located at the bottom are provided with sealing tubes (310). The opposite ends of the two sets of sealing tubes (310) are respectively connected to the conveying component and the connecting component through a flexible connecting component. The other side of the explosion-proof enclosure (100) is provided with a pusher for driving the two sets of sealing tubes (310) to move synchronously and insert into the connecting holes (312) at both ends of the bearing tank (201) at the bottom. A window (206) is provided on the other outer surface of the explosion-proof enclosure (100) and on the upper side of the support column (200). The outer end of the support column (200) and the outer side of each set of mounting holes are provided with positioning grooves (202), and the top of the other side of the explosion-proof enclosure (100) is fixedly connected with a pointer (203) for pointing to one of the positioning grooves (202).

3. The explosion-proof refrigerant recovery device according to claim 2, characterized in that: The pusher includes a support frame (300) fixedly connected to the inner wall of the other side of the explosion-proof enclosure (100). A support ring is fixedly connected to the top of the support frame (300). A double-acting screw (304) is rotatably connected inside the support ring. The outer end of the double-acting screw (304) extends outward through the explosion-proof enclosure (100). Two threaded seats (305) are symmetrically threaded on the double-acting screw (304). Push plates (306) are fixedly connected to the top of the two sets of threaded seats (305). Insertion tubes (309) are fixedly connected to the top of the two sets of push plates (306). The opposite ends of the two sets of insertion tubes (309) are respectively connected to the ends of the corresponding side sealing insertion tubes (310). A fixing member for fixing the double-acting screw (304) is provided on the outer end of the double-acting screw (304).

4. The explosion-proof refrigerant recovery device according to claim 3, characterized in that: The fixing component includes a stabilizing tube (303) rotatably sleeved on the outer end of the bidirectional lead screw (304). The bottom of the stabilizing tube (303) is fixedly connected to the outer surface of the explosion-proof housing (100). The tube wall of the stabilizing tube (303) is threaded with an abutment bolt (301). The screw of the abutment bolt (301) is screwed upward and abuts against the end of the bidirectional lead screw (304).

5. The explosion-proof refrigerant recovery device according to claim 4, characterized in that: The connector includes a U-shaped plate (400) fixedly connected to the outer surface of the other side of the explosion-proof enclosure (100). A U-shaped groove (401) is opened on the inner side of the U-shaped plate (400). An extraction tube (601) is provided inside the U-shaped groove (401). One end of the extraction tube (601) is connected to a flexible connector on the corresponding side. The other end of the extraction tube (601) is connected to a sealing connector for connecting a refrigerant conduit. A pressing member is provided inside the U-shaped plate (400) for pressing the extraction tube (601) into the U-shaped groove (401).

6. The explosion-proof refrigerant recovery device according to claim 5, characterized in that: The sealing connector includes a connecting pipe (500) connected to the other end of the extraction pipe (601). One end of the connecting pipe (500) is connected to a sleeve pipe (505). An airbag ring (506) is provided on the inner wall of the sleeve pipe (505). A four-way pipe (504) is connected to the top of the sleeve pipe (505). The lower end of the four-way pipe (504) is connected to the inside of the airbag ring (506). A pressure gauge (503) and a pressure relief valve (501) are threaded to the left and right ends of the four-way pipe (504) respectively. A pressure ball (502) that pumps gas into the airbag ring (506) is threaded to the top of the four-way pipe (504). The other end of the extraction tube (601) is slidably fitted with a limiting ring (602). The bottom of the limiting ring (602) is fixedly connected to the surface of the U-shaped plate (400). The top of the limiting ring (602) is threadedly connected with a crimping bolt (603). The screw of the crimping bolt (603) is threaded downward through the limiting ring (602) and crimped to the end of the extraction tube (601).

7. The explosion-proof refrigerant recovery device according to claim 5, characterized in that: The press-in component includes a support strip fixedly connected to the front side of the U-shaped plate (400), a double-sided rack (406) slidably connected to the middle of the rear side of the support strip, gears (403) meshing on both sides of the double-sided rack (406), the front axles of the two sets of gears (403) rotatably engaging with the front side of the support strip, linkage plates (404) fixedly connected to the bottom of the two sets of gears (403), the outer ends of the two sets of linkage plates (404) tilt outward and are fixedly connected to pressing plates (402) adapted to the interior of the U-shaped plate (400), and a reset component for driving the double-sided rack (406) to reset is provided on the surface of the rack; The reset component includes a sliding hole (407) opened on the front side of the double-sided rack (406). A guide rod (409) is fixedly connected inside the sliding hole (407). A guide plate (405) is slidably fitted on the surface of the guide rod (409). The front side of the guide plate (405) is fixedly connected to the top of the bearing bar. A push spring (408) is sleeved on the surface of the guide rod (409) located on the upper side of the guide plate (405). The two ends of the push spring (408) respectively abut against the top of the guide plate (405) and the top inner wall of the sliding hole (407).

8. The explosion-proof refrigerant recovery device according to claim 5, characterized in that: The conveying component includes a spiral coil (103) disposed in the upper inner cavity of the explosion-proof housing (100). An installation ring (104) is sleeved on the outer circumferential surface of the spiral coil (103). A fan (102) is fixedly connected to the bottom of the installation ring (104). One end of the spiral coil (103) is connected to one of the flexible connecting parts, and the other end of the spiral coil (103) is connected to the suction end of the compressor (106).

9. The explosion-proof refrigerant recovery device according to claim 5, characterized in that: The flexible connector includes a first hose (101), a second hose (307), and a second hose. One end of the first hose (101) is connected to a sealed insert (310) located inside the chassis, and the other end is connected to the input end of the spiral coil (103) through a first solenoid valve (308). One end of the second hose (307) is connected to a sealed insert (310) located outside the chassis, and the other end is connected to one end of the extraction tube (601) through a second solenoid valve (308).

10. An explosion-proof refrigerant recovery process, characterized in that... Includes the following steps: S1. The storage tank (108) inside the lower side of the explosion-proof enclosure (100) is the core component, used to store the refrigerant medium required for refrigeration operations in a normal manner, and to provide the medium reserve source for the whole refrigeration cycle and filtration and purification operations. The compressor (106) installed inside the upper side of the explosion-proof enclosure (100) is the core power equipment for refrigerant circulation pumping, and continuously provides negative pressure suction and pressure transmission power for the overall circulation of refrigerant. The suction end of the compressor (106) is stably connected to the rotating filter through the conveying component, and the input end of the rotating filter is connected to the external refrigerant guide pipe through the connector, forming a complete closed loop path for refrigerant to enter from the outside, filter and purify, power pump, and circulate and reuse. All core power and liquid storage structures are built inside the explosion-proof enclosure (100), relying on the enclosure shell to isolate the external flammable and explosive working environment. S2. The core operation of refrigerant filtration and purification is completed by a rotating filter component. This component uses a bearing ring (205) fixed on the inner wall of the other side of the explosion-proof enclosure (100) as a fixed base. The bearing ring (205) is rotated and assembled with a bearing column (200) as the bearing base for the rotation of filter consumables. Multiple sets of mounting holes are arranged in a ring at the end of the bearing column (200). Each set of mounting holes is threaded with an independent bearing tank (201) as the carrier of the core filter consumables. All bearing tanks (201) can rotate synchronously with the bearing column (200) to switch working positions. S3. Each carrier tank (201) is equipped with a two-stage filtration structure consisting of a first filtration layer and a second filtration layer. This structure can sequentially intercept impurities, remove particulate matter, and purify the refrigerant medium as it flows through, thereby eliminating solid impurities, oil stains, and various debris mixed in during the refrigerant operation. This prevents impurities from entering the compressor (106) and the circulation pipeline, which could cause equipment wear, pipeline blockage, and a decrease in refrigeration efficiency. S4. Both ends of the carrier tank (201) are reserved with connecting holes (312) as medium inlet and outlet channels. Inside the explosion-proof enclosure (100), for the carrier tank (201) located at the bottom working position, sealing tubes (310) are arranged on the front and rear sides as medium docking and connecting components. The two sets of sealing tubes (310) are connected to the conveying component and the connecting component respectively through flexible connecting parts to form the medium sealing and filtration passage of the carrier tank (201) at the working position. S5. During normal filtration operation, the connecting holes (312) at both ends of the carrier tank (201) at the bottom working position are precisely connected and sealed with the sealing tubes (310) on both sides. The external refrigerant enters the carrier tank (201) through the connector, the corresponding flexible connector, and the sealing tube (310) on one side. After being fully purified by the two-stage filtration layer, it is then guided to the suction end of the compressor (106) through the sealing tube (310) on the other side, the corresponding flexible connector, and the conveying component. After being pressurized and pumped by the compressor (106), it is delivered to the subsequent refrigeration cycle and the liquid storage tank (108) to complete the continuous clean filtration cycle of the refrigerant. S6. When the filter layer inside the carrier tank (201) in the working position is saturated with adsorbed impurities and the filtration efficiency decreases, there is no need to disassemble the overall sealing structure of the explosion-proof enclosure (100). It is only necessary to drive the two sets of sealing tubes (310) to move synchronously in opposite directions through the pusher at the lower side of the explosion-proof enclosure (100), so that the sealing tubes (310) are pulled out from the connecting holes (312) at both ends of the current working carrier tank (201), thereby releasing the medium sealing connection state of the current filtration position. S7. Through the window (206) opened on the upper part of the other side of the explosion-proof enclosure (100), rotate the support column (200) to complete the filter station rotation. During the rotation of the support column (200), rely on the positioning groove (202) opened on the outer side of each set of mounting holes at the outer end, and cooperate with the pointer (203) fixed on the top of the other side of the explosion-proof enclosure (100) to perform alignment calibration, and accurately rotate the brand-new unused support tank (201) to the bottom standard working position. S8. After the precise switching of the workstation is completed, the pusher is operated again to drive the two sets of sealing tubes (310) to move synchronously relative to each other, so that the sealing tubes (310) are re-inserted into the connecting holes (312) at both ends of the new workstation carrier tank (201), restoring the medium sealing and filtration conduction state, and the refrigerant filtration cycle operation can be quickly restarted. The replaced saturated carrier tank (201) can be disassembled, maintained or replaced separately in the future. S9. The power control and position locking of the rotating filter station switching and sealing docking operation are achieved by the matching pusher and fixing parts. The pusher is supported by the support frame (300) fixed on the inner wall of the explosion-proof housing (100). The support ring at the top of the support frame (300) provides rotational assembly support for the double screw (304). The end of the double screw (304) extends outward through the explosion-proof housing (100) for easy external manual operation. Two sets of thread seats (305) are symmetrically mounted on the surface of the double screw (304). Relying on the positive and negative thread structure characteristics of the double screw (304), the screw can drive the two sets of thread seats (305) to move synchronously in opposite directions or linearly in opposite directions when rotating. The thread seats (305) are connected and fixed to the sealing tube (310) through the top push plate (306) and the insertion tube (309), thereby synchronously driving the two sets of sealing tubes (310) to complete the insertion and removal actions. After the sealing tube (310) is adjusted to the correct position, the position is locked and positioned by the fixing component assembled on the outer end of the double-acting screw (304). The fixing component relies on the stabilizing tube (303) fixedly connected to the explosion-proof enclosure (100) as a base. By screwing the abutting bolt (301) on the wall of the stabilizing tube (303), the end of the bolt thread is tightly abutted against the end of the double-acting screw (304). The rotation angle of the double-acting screw (304) is locked by mechanical abutting friction, so as to prevent the screw from rotating and the sealing tube (310) from shifting due to equipment vibration. S10. The sealing operation of the external refrigerant pipeline of the system is achieved by the connector as a whole. The connector uses the U-shaped plate (400) fixed on the outside of the explosion-proof enclosure (100) as the mounting base. The U-shaped groove (401) opened on the inside of the U-shaped plate (400) is used to limit the placement of the extraction pipe (601). One end of the extraction pipe (601) is connected to the sealing insertion pipe (310) through the flexible connector, and the other end is connected to the external refrigerant conduit through the sealing connector to realize the stable introduction of the external refrigerant medium. S11. After the extraction tube (601) is placed inside the U-shaped groove (401), the extraction tube (601) is firmly pressed and limited inside the U-shaped groove (401) by the press-in component; S12. The sealing connector is the core sealing and docking structure of the external refrigerant conduit. It is mainly connected to the pipeline by the connecting pipe (500) and the sleeve pipe (505). The inner wall of the sleeve pipe (505) is equipped with an airbag ring (506) as an adaptive sealing component. The four-way pipe (504) is equipped with a pressure gauge (503), a pressure relief valve (501) and a pressure ball (502). During operation, gas is pumped into the airbag ring (506) by pressing the pressure ball (502), so that the airbag ring (506) is inflated and expands, and tightly fits the outer wall of the external refrigerant conduit. The pressure gauge (503) monitors the inflation pressure inside the airbag ring (506) in real time to ensure that the sealing inflation pressure is within the appropriate range. The pressure relief valve (501) automatically releases pressure when the pressure exceeds the standard. S13. The end of the extraction tube (601) is equipped with a limiting ring (602) and a crimping bolt (603). By tightening the crimping bolt (603) to press down and limit the position, the docking position of the extraction tube (601) is further reinforced. S14. The press-in part inside the connector serves as the core structure for limiting and fixing the extraction tube (601). It is fixed based on the bearing strip. It forms a linkage pressing structure through the double-sided rack (406), the meshing gears (403) on both sides, the linkage plate (404), and the pressing plate (402). The pressing structure is automatically reset by the reset part. During operation, the double-sided rack (406) is moved to drive the gears (403) on both sides to rotate synchronously. The gears (403) drive the two sets of pressing plates (402) to press down synchronously through the linkage plate (404), so that the extraction tube (601) is tightly pressed and fixed inside the U-shaped groove (401), thus completing the pipeline limiting and fixing. S15. The reset component relies on the guide rod (409), guide plate (405) and push spring (408) to cooperate. After the pressing and fixing operation is completed, the double-sided rack (406) and the overall pressing structure are automatically reset by the elastic force of the push spring (408). S16. The heat exchange and flow guiding operation of the refrigerant after filtration and purification is completed by the conveying component. The conveying component is based on the spiral coil (103) arranged in the upper inner cavity of the explosion-proof casing (100) as the core conveying pipe (107). The spiral coil (103) is equipped with a mounting ring (104) and a bottom fan (102) on its outer periphery. After filtration and purification, the refrigerant flows through the spiral coil (103) and is transported to the suction end of the compressor (106). The fan (102) runs to perform auxiliary heat exchange and temperature regulation on the refrigerant flowing inside the spiral coil (103). S17. The flexible connector serves as a flexible buffer and transition component between various rigid pipeline structures. It consists of a first flexible hose (101), a second flexible hose (307), and a corresponding solenoid valve (308). The first flexible hose (101) connects the inner sealing tube (310) of the chassis to the input end of the conveying spiral coil (103). The second flexible hose (307) connects the outer sealing tube (310) of the chassis to the extraction tube (601) of the connector. The two sets of solenoid valves (308) respectively control the on / off state of the two medium connecting pipes (500). S18. The opening and closing of the refrigerant filtration circulation pipeline are precisely controlled by the solenoid valve (308). The medium passage is cut off in a timely manner during the switching of the filtration station, pipeline operation and maintenance, and equipment start-up and shutdown.

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