A refrigerant charging and discharging device for refrigeration equipment

Abstract

This invention discloses a refrigerant charging and discharging device for refrigeration equipment, belonging to the field of refrigerant charging technology. The device includes a refrigeration housing, a filter box detachably connected to the surface of the refrigeration housing, two connecting mechanisms detachably installed on the surface of the refrigeration housing, a filter plate mechanism slidably connected inside the filter box, a collection box slidably connected inside the filter box, a storage tank fixedly connected inside the filter box, and a backflushing mechanism fixedly installed inside the refrigeration housing. The two connecting mechanisms enable rapid docking of the refrigeration housing with the storage tank and the filter box. An extension tube can wrap around the surface of the charging and discharging pipe, improving the tightness of the connection between the connecting pipe and the charging and discharging pipe. A moving ring causes a rotating block and a protrusion to press against the surface of the charging and discharging pipe, preventing the connecting pipe and the charging and discharging pipe from separating due to vibration.

Description

Technical Field

[0001] This invention belongs to the field of refrigerant charging technology, specifically relating to a refrigerant charging and discharging device for refrigeration equipment. Background Technology

[0002] A refrigeration machine is a machine that transfers heat from a cooled object at a lower temperature to the surrounding environment to obtain cooling capacity. The heat transferred from the object at a lower temperature is conventionally called cooling capacity. The working fluid that participates in the thermodynamic process within the refrigeration machine is called refrigerant. The refrigeration temperature range is usually above 120K, and below 120K is the range of cryogenic technology. Refrigeration machines are widely used in industrial and agricultural production and daily life. The refrigerant in them has a certain service life, and when the refrigerant does not meet the service standards, it needs to be maintained and replaced.

[0003] In existing refrigerant charging systems, the structural design of pipe connections has significant flaws, making it difficult to achieve ideal sealing performance. Due to insufficient tightness in the connection between two pipes, the joints are prone to loosening gradually during long-term operation due to factors such as vibration and thermal expansion and contraction, allowing refrigerant molecules to slowly seep through tiny gaps. Especially under high-temperature conditions, ordinary rubber seals age faster, lose elasticity, and further exacerbate the risk of leakage. This not only leads to decreased refrigeration efficiency but also increases environmental pollution and operating costs due to refrigerant loss. Simultaneously, the piping system also faces internal contamination problems. When refrigerant containing dirt particles or residual refrigeration oil continuously flows through the pipes, a layer of viscous dirt gradually adheres to the inner wall, forming a scale layer. This scale not only reduces the effective flow cross-sectional area of ​​the pipes, increasing airflow resistance, but may also cause localized blockages. More seriously, this dirt may be washed off under high pressure and enter the compressor with the refrigerant circulation, exacerbating mechanical wear. Furthermore, existing systems lack effective filtration of the discharged refrigerant. During the recycling or discharge process, refrigerant that has not been adequately purified is released directly into the environment, which not only wastes resources but may also carry harmful components such as oil and acidic substances, causing corrosion to subsequent treatment equipment.

[0004] Therefore, there is an urgent need to provide a refrigerant charging and discharging device for refrigeration equipment to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a refrigerant charging and discharging device for refrigeration equipment.

[0006] The technical solution adopted to solve the above technical problems is: to provide a refrigerant charging and discharging device for refrigeration equipment, including a refrigeration box, a charging and discharging pipe fixedly connected inside the refrigeration box, a filter box detachably connected to the surface of the refrigeration box, the filter box being used for temporary storage of the refrigerant discharged from the refrigeration box into the filter box, and also including;

[0007] Two connecting mechanisms are detachably installed on the surface of the refrigeration box. One of the connecting mechanisms is used to connect the refrigeration box to the filter box. A filter plate mechanism is slidably connected inside the filter box. The filter plate mechanism is used to filter the refrigerant discharged from the refrigeration box into the filter box.

[0008] A collection box is slidably connected inside the filter box, which is used to collect dirt in the refrigerant. A storage tank is fixedly connected inside the filter box. Another connecting mechanism is used to connect the refrigeration box and the storage tank. The storage tank is used to store new refrigerant and filtered refrigerant. A backflushing mechanism is fixedly installed inside the charging and discharging pipe. The backflushing mechanism is used to guide part of the refrigerant through the charging and discharging pipe to backflush the connecting pipe and the inside of the filter box.

[0009] The present invention is further configured such that: a controller is fixedly installed on the surface of the refrigeration box, a sealing gasket is fixedly installed at the end of the charging and discharging pipe, a first valve is fixedly installed on the surface of the charging and discharging pipe, and multiple screw holes are opened on the surface of the charging and discharging pipe.

[0010] Through the above technical solution, the charging and discharging pipes are used for charging and discharging the refrigerant inside the refrigeration box, and are connected to the charging pipe and the connecting pipe respectively. The controller controls the operation of the recovery machine and the charging machine inside the refrigeration box for refrigerant recovery and charging. The sealing gasket improves the tightness of the connection between the two pipes. The first valve controls the opening and closing of the charging and discharging pipes. The screw hole and bolts allow the baffle of the backflushing mechanism to be fixed after rotating inside the charging and discharging pipes. When the first valve is opened, the refrigerant in the refrigeration box can be discharged into the filter box.

[0011] The present invention is further configured such that: a conveying pipe is fixedly connected inside the filter box, the conveying pipe is fixedly connected to the inside of the storage tank, vertical grooves and multiple inclined grooves are opened on the surface of the filter box, and a collection chamber is opened inside the filter box.

[0012] Through the above technical solution, the refrigerant discharged from the inside of the refrigeration box is discharged into the filter box for storage and filtration through the charging and discharging pipe and the connecting pipe. After filtration, the refrigerant is transported to the storage tank through the conveying pipe. The vertical groove is used for the sliding of the first filter plate, and the inclined groove is used for the sliding of the second filter plate. When the first filter plate and the second filter plate slide, the vertical groove and the inclined groove scrape off the dirt accumulated on the surface of the first filter plate and the second filter plate, and the dirt falls into the collection chamber.

[0013] The present invention is further configured such that: a fixing block is fixedly installed inside the filter box, a first cylinder is fixedly installed inside the fixing block, and a scraper is fixedly installed at the end of the first cylinder, the scraper being configured as an annular shape.

[0014] Through the above technical solution, the scraper slides inside the filling and draining pipes and the connecting pipes to scrape off the dirt on the inner walls of the filling and draining pipes and the connecting pipes, and pushes the scraped dirt into the collection box inside the filter box.

[0015] The present invention is further configured such that: the connecting mechanism includes two connecting pipes, one of which is fixedly connected to the interior of the filter box, and the end of the other connecting pipe is movably fitted to one end of the charging / discharging pipe; the scraper is slidably connected inside the charging / discharging pipe and the connecting pipe, and the surface of the scraper is movably fitted to the inner wall of the charging / discharging pipe and the connecting pipe; a gap is formed between the connection point of the connecting pipe and the filter box and the fixed block; the refrigerant discharged from the refrigeration box enters the interior of the filter box through the gap; an extension pipe is fixedly connected to the end of the connecting pipe; the charging / discharging pipe is slidably connected inside the extension pipe; the inner diameter of the extension pipe is the same as the outer diameter of the charging / discharging pipe; a fixing ring is fixedly installed on the surface of the connecting pipe; a symmetrical second cylinder is fixedly installed on the surface of the fixing ring; a moving ring is fixedly installed at the end of the second cylinder; and the moving ring is slidably connected to the surface of the extension pipe.

[0016] With the above technical solution, the connection mechanism is set into two sets, which are used to connect the refrigeration box to the filter box and the storage tank respectively. The filling and draining pipes are connected to the two connecting pipes respectively. The scraper scrapes the dirt inside the filling and draining pipes and the connecting pipes and discharges it into the filter box for treatment through the gap formed between the connection between the connecting pipe and the filter box and the fixed block. The extension pipe wraps the filling and draining pipes to further improve the sealing between the filling and draining pipes and the connecting pipes. When the second cylinder is started, it can push the moving ring to move on the surface of the extension pipe.

[0017] The invention is further configured such that: a plurality of rotating grooves are formed on the surface of the extension tube; a rotating block is rotatably connected inside the rotating groove; a rotating shaft is fixedly installed inside the rotating groove; the rotating block is rotatably connected to the surface of the rotating shaft; a torsion spring is fixedly connected between the surface of the rotating block and the inner wall of the rotating groove; the rotating shaft passes through the interior of the torsion spring; an inclined block is fixedly installed on the upper surface of the rotating block; the inner wall of the moving ring is movably fitted with the surface of the inclined block; a plurality of protrusions are fixedly installed on the lower surface of the rotating block; and the protrusions are movably fitted with the surface of the filling and discharging tube.

[0018] With the above technical solution, when the extension tube wraps around the filling and draining tube, the rotating block inside the rotating groove is in contact with the surface of the filling and draining tube. At this time, the first cylinder is activated, and the moving ring moves to the surface of the inclined block to squeeze the inclined block. The inclined block is further squeezed, so that the protrusion squeezes the surface of the filling and draining tube, improving the tightness of the connection between the filling and draining tube and the connecting tube. When the connecting tube separates from the filling and draining tube, the moving ring moves away from the surface of the inclined block, and the rotating block rebounds under the action of the torsion spring, canceling the squeezing of the protrusion on the filling and draining tube, and the filling and draining tube can be separated from the connecting tube.

[0019] The present invention is further configured such that: the filter plate mechanism includes two movable plates, one of which is slidably connected inside the filter box, and the other of which is located outside the filter box; a first filter plate and a plurality of second filter plates are fixedly connected between the two movable plates; the plurality of second filter plates are staggered from top to bottom and are set in an inclined shape between the two movable plates; the first filter plate is slidably connected inside the vertical groove; the second filter plates are slidably connected inside the inclined groove; and a first handle is fixedly installed on the surface of the other movable plate.

[0020] Through the above technical solution, the first filter plate performs preliminary filtration of the discharged refrigerant, and the second filter plate performs secondary filtration. When it is necessary to clean the surfaces of the first and second filter plates, pull the first handle to make the two movable plates slide on the surface and inside the filter box. The vertical groove scrapes off the dirt on the surface of the first filter plate, and the inclined groove scrapes off the dirt on the surface of the second filter plate. The scraped dirt falls into the collection box for further processing.

[0021] The invention is further configured such that: the collection box is slidably connected to the collection chamber, the collection box is located below the first filter plate and the second filter plate, and a second handle is fixedly installed on the surface of the collection box.

[0022] With the above technical solution, the collection box can be removed from the collection chamber after pulling the second handle, and the dirt inside the connecting pipe and the filling and draining pipe, as well as the dirt on the surface of the first filter plate and the second filter plate, can be centrally treated.

[0023] The present invention is further configured such that: a filling pipe is fixedly connected inside the storage tank, the other end of the filling pipe is fixedly connected to another connecting pipe, the end of the other connecting pipe is movably fitted with the other end of the filling and discharging pipe, a replenishing pipe is fixedly connected to the surface of the storage tank, and a second valve is fixedly installed on the surface of the filling pipe.

[0024] With the above technical solution, after opening the second valve, the refrigerant can be charged. The refrigerant inside the storage tank is transported to the charging and discharging pipe through the charging pipe and connecting pipe for refrigerant charging. The replenishment pipe is used to replenish new refrigerant into the storage tank.

[0025] The present invention is further configured such that: the backflush mechanism includes a rotating handle, the rotating handle is rotatably connected to the surface of the filling and draining pipe, a baffle is fixedly connected to the surface of the rotating handle, the baffle is rotatably connected to the inside of the filling and draining pipe, bolts are threadedly connected to both the screw hole and the inside of the rotating handle, and the baffle is disposed on one side of the connection between the filling and draining pipe and the filling pipe.

[0026] The above technical solution allows for angle adjustment of the baffle by rotating the handle. Three screw holes are provided. During charging, the baffle is perpendicular to the charging / discharging pipe, and the bolt is inserted into the highest screw hole to fix the baffle position. When backflushing is required, the baffle is rotated 45 degrees, tilting it, and the bolt is inserted into the middle screw hole to guide some refrigerant into the charging / discharging pipe and connecting pipe, backflushing away dirt. During discharge, the second valve is closed, the baffle is horizontal to the charging / discharging pipe, and the bolt is inserted into the lowest screw hole to fix the baffle.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. The present invention is provided with two connecting mechanisms, which can realize the quick docking of the refrigeration box with the storage tank and the filter box. The extension tube can wrap the surface of the charging and discharging tube to improve the tightness of the connection between the connecting tube and the charging and discharging tube. The moving ring causes the rotating block and the protrusion to squeeze the surface of the charging and discharging tube to prevent the connecting tube and the charging and discharging tube from separating after being vibrated.

[0029] 2. The present invention is equipped with a filter box and a collection box. The filter box is equipped with a filter plate mechanism to filter the discharged refrigerant twice. A scraper is provided to scrape off the dirt on the inner wall of the charging and discharging pipe and the connecting pipe, and push the scraped dirt into the collection box for centralized treatment, so as to avoid blockage inside the pipe and improve the efficiency of refrigerant discharge and charging.

[0030] 3. The present invention is equipped with a backflushing mechanism, which can perform secondary cleaning of the dirt inside the charging and discharging pipes and connecting pipes. When the refrigerant is charged, the baffle is rotated at an angle to guide some of the refrigerant into the charging and discharging pipes and connecting pipes to backflush the dirt, thereby further improving the efficiency of refrigerant charging and discharging. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0033] Figure 3 This is a schematic diagram of the filter box structure of the present invention;

[0034] Figure 4This is a schematic diagram of the filter plate mechanism and collection box structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection mechanism structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the extension tube structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the rotating block structure of the present invention;

[0038] Figure 8 This is a schematic diagram of the scraper structure of the present invention;

[0039] Figure 9 This is a schematic diagram of the recoil mechanism structure of the present invention.

[0040] Reference numerals: 1. Refrigeration box; 11. Charging / discharging pipe; 12. Controller; 13. Sealing gasket; 14. First valve; 15. Screw hole; 2. Filter box; 21. Conveying pipe; 22. Vertical trough; 23. Inclined trough; 24. Collection bin; 25. Fixing block; 26. First cylinder; 27. Scraper; 3. Connecting mechanism; 31. Connecting pipe; 32. Extension pipe; 33. Fixing ring; 34. Second cylinder; 35. Moving ring; 36. Rotary ring. 37. Moving groove; 38. Rotating block; 39. Rotating shaft; 301. Torsion spring; 302. Inclined block; 303. Protrusion; 4. Filter plate mechanism; 41. Movable plate; 42. First filter plate; 43. Second filter plate; 44. First handle; 5. Collection box; 51. Second handle; 6. Storage bucket; 61. Filling pipe; 62. Feeding pipe; 63. Second valve; 7. Backflushing mechanism; 71. Rotating handle; 72. Baffle; 73. Bolt. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Please see Figures 1-9 This application provides a refrigerant charging and discharging device for refrigeration equipment, including a refrigeration box 1, a charging and discharging pipe 11 fixedly connected inside the refrigeration box 1, and a filter box 2 detachably connected to the surface of the refrigeration box 1. The filter box 2 is used to temporarily store the refrigerant discharged from the refrigeration box 1 into the filter box 2.

[0043] like Figure 2 and Figure 5As shown, a controller 12 is fixedly installed on the surface of the refrigeration box 1, a sealing gasket 13 is fixedly installed at the end of the charging and discharging pipe 11, a first valve 14 is fixedly installed on the surface of the charging and discharging pipe 11, and multiple screw holes 15 are opened on the surface of the charging and discharging pipe 11.

[0044] In this embodiment, the charging and discharging pipe 11 is used for charging and discharging the refrigerant inside the refrigeration box 1, and is connected to the charging pipe 61 and the connecting pipe 31 respectively. The controller 12 controls the operation of the recovery machine and the charging machine inside the refrigeration box 1 for refrigerant recovery and charging. The sealing gasket 13 improves the tightness of the connection between the two pipes. The first valve 14 controls the opening and closing of the charging and discharging pipe 11. The screw hole 15 cooperates with the bolt 73 to fix the baffle 72 of the backflushing mechanism 7 after it rotates inside the charging and discharging pipe 11. When the first valve 14 is opened, the refrigerant of the refrigeration box 1 can be discharged into the filter box 2.

[0045] like Figure 2 and Figure 3 As shown, a conveying pipe 21 is fixedly connected inside the filter box 2, and the conveying pipe 21 is fixedly connected to the inside of the storage bucket 6. Vertical grooves 22 and multiple inclined grooves 23 are opened on the surface of the filter box 2, and a collection bin 24 is opened inside the filter box 2.

[0046] In this embodiment, the refrigerant discharged from the inside of the refrigeration box 1 is discharged into the filter box 2 for storage and filtration through the charging and discharging pipe 11 and the connecting pipe 31. After filtration, the refrigerant is transported to the storage tank 6 through the conveying pipe 21. The vertical groove 22 is used for the sliding of the first filter plate 42, and the inclined groove 23 is used for the sliding of the second filter plate 43. When the first filter plate 42 and the second filter plate 43 slide, the vertical groove 22 and the inclined groove 23 scrape off the dirt accumulated on the surface of the first filter plate 42 and the second filter plate 43, and the dirt falls into the collection chamber 24.

[0047] like Figure 3 and Figure 8 As shown, a fixing block 25 is fixedly installed inside the filter box 2, and a first cylinder 26 is fixedly installed inside the fixing block 25. A scraper 27 is fixedly installed at the end of the first cylinder 26, and the scraper 27 is set in a circular shape.

[0048] In this embodiment, the scraper 27 slides inside the filling and draining pipe 11 and the connecting pipe 31 to scrape off the dirt on the inner wall of the filling and draining pipe 11 and the connecting pipe 31, and pushes the scraped dirt into the collection box 5 inside the filter box 2.

[0049] Two connecting mechanisms 3 are detachably installed on the surface of the refrigeration box 1. One connecting mechanism 3 is used to connect the refrigeration box 1 to the filter box 2. A filter plate mechanism 4 is slidably connected inside the filter box 2. The filter plate mechanism 4 is used to filter the refrigerant discharged from the refrigeration box 1 into the filter box 2.

[0050] like Figure 2 and Figure 5 As shown, the connecting mechanism 3 includes two connecting pipes 31. One connecting pipe 31 is fixedly connected to the inside of the filter box 2, and the end of the other connecting pipe 31 is movably fitted to one end of the charging / discharging pipe 11. The scraper 27 is slidably connected inside the charging / discharging pipe 11 and the connecting pipe 31. The surface of the scraper 27 is movably fitted to the inner wall of the charging / discharging pipe 11 and the connecting pipe 31. A gap is formed between the connection point of the connecting pipe 31 and the filter box 2 and the fixing block 25. The refrigerant discharged from the refrigeration box 1 enters the inside of the filter box 2 through the gap. An extension pipe 32 is fixedly connected to the end of the connecting pipe 31. The charging / discharging pipe 11 is slidably connected inside the extension pipe 32. The inner diameter of the extension pipe 32 is the same as the outer diameter of the charging / discharging pipe 11. A fixing ring 33 is fixedly installed on the surface of the connecting pipe 31. A symmetrical second cylinder 34 is fixedly installed on the surface of the fixing ring 33. A moving ring 35 is fixedly installed at the end of the second cylinder 34. The moving ring 35 is slidably connected to the surface of the extension pipe 32.

[0051] In this embodiment, the connecting mechanism 3 is set into two sets, which are used to connect the refrigeration box 1 to the filter box 2 and the storage tank 6 respectively. The filling and draining pipe 11 is connected to the two connecting pipes 31 respectively. The scraper 27 scrapes the dirt inside the filling and draining pipe 11 and the connecting pipe 31 and discharges it into the filter box 2 through the gap formed between the connection between the connecting pipe 31 and the filter box 2 and the fixing block 25. The extension pipe 32 wraps the filling and draining pipe 11 to further improve the sealing between the filling and draining pipe 11 and the connecting pipe 31. When the second cylinder 34 is started, it can push the moving ring 35 to move on the surface of the extension pipe 32.

[0052] like Figure 6 and Figure 7 As shown, the surface of the extension tube 32 is provided with multiple rotating grooves 36, and a rotating block 37 is rotatably connected inside the rotating groove 36. A rotating shaft 38 is fixedly installed inside the rotating groove 36, and the rotating block 37 is rotatably connected to the surface of the rotating shaft 38. A torsion spring 39 is fixedly connected between the surface of the rotating block 37 and the inner wall of the rotating groove 36. The rotating shaft 38 passes through the inside of the torsion spring 39. An inclined block 301 is fixedly installed on the upper surface of the rotating block 37. The inner wall of the moving ring 35 is movably attached to the surface of the inclined block 301. Multiple protrusions 302 are fixedly installed on the lower surface of the rotating block 37. The protrusions 302 are movably attached to the surface of the charging and discharging tube 11.

[0053] In a further embodiment, when the extension tube 32 wraps around the charging and discharging tube 11, the rotating block 37 inside the rotating groove 36 is in contact with the surface of the charging and discharging tube 11. At this time, the first cylinder 26 is activated, and the moving ring 35 moves to the surface of the inclined block 301 to squeeze the inclined block 301. The inclined block 301 is further squeezed, so that the protrusion 302 squeezes the surface of the charging and discharging tube 11, improving the tightness of the connection between the charging and discharging tube 11 and the connecting tube 31. When the connecting tube 31 separates from the charging and discharging tube 11, the moving ring 35 moves away from the surface of the inclined block 301, and the rotating block 37 rebounds under the action of the torsion spring 39, canceling the squeezing of the protrusion 302 on the charging and discharging tube 11. The charging and discharging tube 11 and the connecting tube 31 can then be separated.

[0054] like Figure 2 and Figure 4 As shown, the filter plate mechanism 4 includes two movable plates 41. One movable plate 41 is slidably connected inside the filter box 2, and the other movable plate 41 is located outside the filter box 2. A first filter plate 42 and a plurality of second filter plates 43 are fixedly connected between the two movable plates 41. The plurality of second filter plates 43 are staggered from top to bottom and are set in an inclined shape between the two movable plates 41. The first filter plate 42 is slidably connected inside the vertical groove 22, and the second filter plates 43 are slidably connected inside the inclined groove 23. A first handle 44 is fixedly installed on the surface of the other movable plate 41.

[0055] In this embodiment, the first filter plate 42 performs preliminary filtration of the discharged refrigerant, while the second filter plate 43 performs secondary filtration. When it is necessary to clean the surfaces of the first filter plate 42 and the second filter plate 43, the first handle 44 is pulled to make the two movable plates 41 slide on the surface and inside the filter box 2. The vertical groove 22 scrapes off the dirt on the surface of the first filter plate 42, and the inclined groove 23 scrapes off the dirt on the surface of the second filter plate 43. The scraped dirt falls into the collection box 5 for further processing.

[0056] A collection box 5 is slidably connected inside the filter box 2. The collection box 5 is used to collect dirt in the refrigerant. A storage tank 6 is fixedly connected inside the filter box 2. Another connecting mechanism 3 is used to connect the refrigeration box 1 and the storage tank 6. The storage tank 6 is used to store new refrigerant and filtered refrigerant. A backflushing mechanism 7 is fixedly installed inside the charging and discharging pipe 11. The backflushing mechanism 7 is used to guide part of the refrigerant through the charging and discharging pipe 11 to backflush the connecting pipe 31 and the inside of the filter box 2.

[0057] like Figure 2 and Figure 4 As shown, the collection box 5 is slidably connected to the collection chamber 24. The collection box 5 is located below the first filter plate 42 and the second filter plate 43. A second handle 51 is fixedly installed on the surface of the collection box 5.

[0058] In this embodiment, after pulling the second handle 51, the collection box 5 can be taken out from the collection chamber 24, and the dirt inside the connecting pipe 31 and the filling and draining pipe 11, as well as the dirt on the surface of the first filter plate 42 and the second filter plate 43, can be centrally treated.

[0059] like Figure 2 and Figure 5 As shown, a filling pipe 61 is fixedly connected inside the storage tank 6. The other end of the filling pipe 61 is fixedly connected to another connecting pipe 31. The end of the other connecting pipe 31 is movably fitted to the other end of the filling and discharging pipe 11. A replenishing pipe 62 is fixedly connected to the surface of the storage tank 6. A second valve 63 is fixedly installed on the surface of the filling pipe 61.

[0060] In this embodiment, after the second valve 63 is opened, the refrigerant can be charged. The refrigerant inside the storage tank 6 is transported to the charging and discharging pipe 11 through the charging pipe 61 and the connecting pipe 31 for refrigerant charging. The replenishing pipe 62 is used to replenish new refrigerant into the storage tank 6.

[0061] like Figure 5 and Figure 9 As shown, the backflushing mechanism 7 includes a rotating handle 71, which is rotatably connected to the surface of the filling and draining pipe 11. A baffle 72 is fixedly connected to the surface of the rotating handle 71, and the baffle 72 is rotatably connected to the inside of the filling and draining pipe 11. Bolts 73 are threadedly connected to both the screw hole 15 and the inside of the rotating handle 71. The baffle 72 is located on one side of the connection between the filling and draining pipe 11 and the filling pipe 61.

[0062] In this embodiment, rotating the handle 71 allows for angle adjustment of the baffle 72. Three screw holes 15 are provided. During charging, the baffle 72 is perpendicular to the charging / discharging pipe 11. Bolts 73 are inserted into the highest screw hole 15 to fix the position of the baffle 72. When backflushing is required, the baffle 72 is rotated 45 degrees, placing it in an inclined state. Bolts 73 are inserted into the middle screw hole 15, guiding some refrigerant to the charging / discharging pipe 11 and the connecting pipe 31 to backflush the dirt. During discharge, the second valve 63 is closed, and the baffle 72 is horizontal with the charging / discharging pipe 11. Bolts 73 are inserted into the lowest screw hole 15 to fix the baffle 72.

[0063] The working principle of this embodiment is as follows: First, the first valve 14 is opened and the second valve 63 is closed. The baffle 72 and the charging / discharging pipe 11 are in a horizontal state. The bolt 73 is inserted into the lowest screw hole 15 to fix the baffle 72. The controller 12 controls the recovery machine inside the refrigeration box 1 to discharge the refrigerant. The refrigerant enters the filter box 2 through the charging / discharging pipe 11 and the connecting pipe 31 for filtration. After filtration, it is transported to the storage tank 6 through the conveying pipe 21 for temporary storage. After the discharge is completed, the baffle 72 is rotated so that the baffle 72 and the charging / discharging pipe 11 are in a vertical state. The bolt 73 is inserted into the highest screw hole 15 to fix the position of the baffle 72. The baffle 72 seals the rear end of the charging / discharging pipe 11. The controller 12 controls the charging machine inside the refrigeration box 1 to charge the refrigerant. At this time, the second valve 63 is opened. The refrigerant inside the storage tank 6 enters the refrigeration chamber 1 through the charging pipe 61, connecting pipe 31, and charging / discharging pipe 11. When backflushing is required, the baffle 72 is rotated 45 degrees, and the baffle 72 is in an inclined state. The bolt 73 is inserted into the screw hole 15 at the middle height, which can guide some refrigerant to the charging / discharging pipe 11 and the connecting pipe 31 to backflush the dirt. When it is necessary to clean the surface of the first filter plate 42 and the second filter plate 43, the first handle 44 is pulled to make the two movable plates 41 slide on the surface and inside of the filter box 2. The vertical groove 22 scrapes the dirt on the surface of the first filter plate 42, and the inclined groove 23 scrapes the dirt on the surface of the second filter plate 43. The scraped dirt falls into the collection box 5 for further processing. After the discharge and charging work is completed, the first cylinder 26 is started to push the scraper 27 to clean the dirt on the inner wall of the charging / discharging pipe 11 and the connecting pipe 31.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A refrigerant charging and discharging device for refrigeration equipment, comprising a refrigeration housing (1), characterized in that, The refrigeration box (1) is fixedly connected to the inside of the charging and discharging pipe (11), and the surface of the refrigeration box (1) is detachably connected to the filter box (2). The filter box (2) is used to temporarily store the refrigerant discharged from the refrigeration box (1) into the filter box (2), and also includes; The surface of the refrigeration box (1) is detachably equipped with two connecting mechanisms (3). One of the connecting mechanisms (3) is used to connect the refrigeration box (1) to the filter box (2). The filter box (2) is slidably connected with a filter plate mechanism (4). The filter plate mechanism (4) is used to filter the refrigerant discharged from the refrigeration box (1) into the filter box (2). The filter box (2) is slidably connected to a collection box (5), which is used to collect dirt in the refrigerant. The filter box (2) is fixedly connected to a storage tank (6). Another connecting mechanism (3) is used to connect the refrigeration box (1) to the storage tank (6). The storage tank (6) is used to store new refrigerant and filtered refrigerant. The filter box (2) is fixedly installed with a fixing block (25), and a first cylinder (26) is fixedly installed inside the fixing block (25). A scraper (27) is fixedly installed at the end of the first cylinder (26), and the scraper (27) is set in a circular shape. The connecting mechanism (3) includes two connecting pipes (31). One connecting pipe (31) is fixedly connected to the inside of the filter box (2), and the end of the other connecting pipe (31) is movably fitted to one end of the charging / discharging pipe (11). The scraper (27) is slidably connected inside the charging / discharging pipe (11) and the connecting pipe (31). The surface of the scraper (27) is movably fitted to the inner wall of the charging / discharging pipe (11) and the connecting pipe (31). A gap is formed between the connection point of the connecting pipe (31) and the filter box (2) and the fixed block (25). The refrigerant discharged from the refrigeration box (1) flows from... The gap enters the filter box (2). The end of the connecting pipe (31) is fixedly connected to the extension pipe (32). The filling and draining pipe (11) is slidably connected inside the extension pipe (32). The inner diameter of the extension pipe (32) is the same as the outer diameter of the filling and draining pipe (11). A fixing ring (33) is fixedly installed on the surface of the connecting pipe (31). A symmetrical second cylinder (34) is fixedly installed on the surface of the fixing ring (33). A moving ring (35) is fixedly installed at the end of the second cylinder (34). The moving ring (35) is slidably connected to the surface of the extension pipe (32). The surface of the extension tube (32) is provided with a plurality of rotating grooves (36), a rotating block (37) is rotatably connected inside the rotating groove (36), a rotating shaft (38) is fixedly installed inside the rotating groove (36), the rotating block (37) is rotatably connected to the surface of the rotating shaft (38), a torsion spring (39) is fixedly connected between the surface of the rotating block (37) and the inner wall of the rotating groove (36), the rotating shaft (38) passes through the inside of the torsion spring (39), an inclined block (301) is fixedly installed on the upper surface of the rotating block (37), the inner wall of the moving ring (35) is movably fitted with the surface of the inclined block (301), a plurality of protrusions (302) are fixedly installed on the lower surface of the rotating block (37), and the protrusions (302) are movably fitted with the surface of the charging and discharging tube (11); The charging and discharging pipe (11) is fixedly installed with a backflushing mechanism (7). The backflushing mechanism (7) is used to guide part of the refrigerant through the charging and discharging pipe (11) to backflush the connecting pipe (31) and the filter box (2). The backflush mechanism (7) includes a rotating handle (71), which is rotatably connected to the surface of the filling and draining pipe (11). A baffle (72) is fixedly connected to the surface of the rotating handle (71), and the baffle (72) is rotatably connected to the inside of the filling and draining pipe (11). The surface of the filling and draining pipe (11) is provided with multiple screw holes (15), and bolts (73) are threadedly connected to the inside of the screw holes (15) and the rotating handle (71). The baffle (72) is located on one side of the connection between the filling and draining pipe (11) and the filling pipe (61).

2. The refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that, A controller (12) is fixedly installed on the surface of the refrigeration box (1), a sealing gasket (13) is fixedly installed at the end of the charging and discharging pipe (11), and a first valve (14) is fixedly installed on the surface of the charging and discharging pipe (11).

3. The refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that, The filter box (2) is fixedly connected to the inside of the conveying pipe (21), which is fixedly connected to the inside of the storage bucket (6). The surface of the filter box (2) is provided with vertical grooves (22) and multiple inclined grooves (23). The inside of the filter box (2) is provided with a collection bin (24).

4. A refrigerant charging and discharging device for refrigeration equipment according to claim 3, characterized in that, The filter plate mechanism (4) includes two movable plates (41). One movable plate (41) is slidably connected inside the filter box (2), and the other movable plate (41) is located outside the filter box (2). A first filter plate (42) and a plurality of second filter plates (43) are fixedly connected between the two movable plates (41). The plurality of second filter plates (43) are staggered from top to bottom and set in an inclined shape between the two movable plates (41). The first filter plate (42) is slidably connected inside the vertical groove (22), and the second filter plate (43) is slidably connected inside the inclined groove (23). A first handle (44) is fixedly installed on the surface of the other movable plate (41).

5. A refrigerant charging and discharging device for refrigeration equipment according to claim 4, characterized in that, The collection box (5) is slidably connected to the collection chamber (24). The collection box (5) is located below the first filter plate (42) and the second filter plate (43). A second handle (51) is fixedly installed on the surface of the collection box (5).

6. A refrigerant charging and discharging device for refrigeration equipment according to claim 2, characterized in that, The storage tank (6) is fixedly connected to a filling pipe (61), the other end of the filling pipe (61) is fixedly connected to another connecting pipe (31), the end of the other connecting pipe (31) is movably fitted to the other end of the filling and draining pipe (11), a replenishing pipe (62) is fixedly connected to the surface of the storage tank (6), and a second valve (63) is fixedly installed on the surface of the filling pipe (61).

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