Dual-station helium gas filling recovery leak detection device for automobile air conditioning heat exchanger and leak detection method thereof

Abstract

The invention discloses a double-station helium inflation recovery leak detection device for an automobile air-conditioning heat exchanger and a leak detection method thereof, comprising a control box and an inflation pipeline. Both sides of the control box are provided with detection boxes, and the box cover is opened to drive the arc rod to deflect, thereby driving the gear plate five to rotate, thereby driving the gear plate four to rotate, thereby driving the shaft three to rotate, thereby driving the gear plate three to rotate, and then driving the gear plate two to rotate through a chain, thereby driving the shaft two to rotate, thereby driving the gear plate one to rotate, thereby driving the rack one to move, and then driving the placement plate to move and drive the workpiece to extend out of the vacuum box, thereby preventing the user's head from easily hitting the box cover when placing or taking the exchanger, thereby increasing the user experience, on the contrary, closing the box cover to automatically retract the placement plate into the vacuum box, and at the same time driving the gear plate six to roll along the rack two, thereby driving the shaft five to rotate, thereby driving the reel to rotate and wrap around the inflation pipeline, thereby making the inflation pipeline placement more orderly.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts production and detection, in particular to a double-station helium gas filling recovery leak detection device for an automobile air-conditioning heat exchanger and a leak detection method thereof. Background Art

[0002] When automobile air conditioners are produced and assembled, the process flow stipulates a leak detection process for the air conditioner heat exchanger to check whether there is a leak in the air conditioner heat exchanger. The method usually used in this leak detection process is to first place the exchanger in a vacuum box of a leak detection device, then connect it to the inflation pipe, and then start the device to close the cover of the vacuum box, first fill nitrogen into the exchanger for leak detection. If nitrogen leakage is detected, helium is filled into the exchanger for leak detection. At the same time, the helium filled can be recovered and reused by the leak detection device.

[0003] However, during use of the vacuum box of the existing leak picking device, the user is required to place the exchanger in the vacuum box personally. At the same time, due to the limited overall height of the leak picking device, the maximum opening and closing angle of the box cover of the vacuum box is limited. Therefore, when the user places or takes the exchanger, his head may easily hit the box cover, causing physical damage to the user. At the same time, some tall workers need to bend down to operate in order to avoid their heads hitting the box cover, which makes the workers feel uncomfortable. For this reason, we propose a double-station helium inflation recovery leak detection device for an automotive air-conditioning heat exchanger and a leak picking method thereof. Summary of the invention

[0004] The purpose of the present invention is to provide a double-station helium gas filling recovery leak detection device for automobile air-conditioning heat exchanger and a leak detection method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-station helium gas filling recovery leak detection device for automobile air-conditioning heat exchanger, comprising a control box and a gas filling pipeline, detection boxes are arranged on both sides of the control box, placement slots are arranged in the two detection boxes, vacuum boxes are arranged in the placement slots, a box cover is arranged on the vacuum box, a shaft 1 is arranged at one end of the box cover, the shaft 1 is connected to the detection box, a placement plate is arranged in the vacuum box, a linkage mechanism is arranged on the side wall of the vacuum box, the box cover is deflected to open and the linkage mechanism is used to drive the placement plate to move out of the vacuum box;

[0006] The placement plate is provided with a reel, and the inflatable pipe is wound around the reel, and an auxiliary mechanism is provided on one side of the placement plate, which moves and retracts the placement plate into the vacuum box, and at the same time, the auxiliary mechanism is used to drive the reel to rotate, wind and store the inflatable pipe. Different from the prior art, in actual use, the arc rod is deflected by opening the box cover, thereby driving the gear plate five to rotate, thereby driving the gear plate four to rotate, thereby driving the shaft three to rotate, thereby driving the gear plate three to rotate, and then driving the gear plate two to rotate through the chain, thereby driving the shaft two to rotate, and then driving the gear plate one to rotate, thereby driving the rack one to move, thereby driving the placement plate to move and drive the workpiece to extend out of the vacuum box, thereby preventing the user's head from easily hitting the box cover when placing or taking the exchanger, thereby increasing the user experience, on the contrary, closing the box cover to automatically retract the placement plate into the vacuum box, and at the same time driving the gear plate six to roll along the rack two, thereby driving the shaft five to rotate, thereby driving the reel to rotate and wind the inflatable pipe, thereby making the placement of the inflatable pipe more orderly.

[0007] Preferably, guide rails are provided on both sides of the placement plate, and fixed columns are provided on both sides of the vacuum box, and one guide rail passes through one fixed column and slides along the fixed column to drive the placement plate to move;

[0008] The linkage mechanism includes a second shaft arranged on the vacuum box, a toothed disc 1 is arranged at one end of the second shaft, and a rack 1 meshing with the toothed disc 1 is arranged on the placement plate, and the placement plate is moved by rotating the second shaft;

[0009] One end of the second shaft passes through the vacuum box and is provided with a second gear disc. A third shaft is provided on the side wall of the vacuum box. A third gear disc is provided on the third shaft. The third gear disc is connected to the second gear disc through a chain. Rotating the third shaft drives the second shaft to rotate.

[0010] A shaft 4 is arranged on the side wall of the vacuum box, a toothed disc 4 is arranged on the shaft 3, and a toothed disc 5 meshing with the toothed disc 4 is arranged on the shaft 4, and the rotation of the toothed disc 5 drives the shaft 3 to rotate;

[0011] An arc rod is arranged on the side wall of the box cover, and a plurality of tooth grooves meshing with the toothed disc five are evenly and equidistantly formed on the arc rod, so that the box cover is deflected to drive the toothed disc five to rotate.

[0012] Preferably, the diameter of the toothed disc three is designed to be larger than that of the toothed disc two.

[0013] Preferably, the end of the arc-shaped rod close to the box cover adopts a smooth arc surface design.

[0014] Preferably, the auxiliary mechanism comprises a shaft 5 arranged on the placement plate, one end of the shaft 5 is fixed to the reel, one end of the shaft 5 passes through the placement plate and is provided with a toothed disc 6, a rack 2 meshing with the toothed disc 6 is provided at the bottom end of the vacuum box, and the placement plate is moved to drive the toothed disc 6 to roll along the rack 2, so that the reel rotates;

[0015] A limiting hole is arranged at one end of the reel, and one end of the inflation pipe passes through the limiting hole.

[0016] Preferably, the contact surface between the reel and the inflation pipe is designed with a flexible material.

[0017] Preferably, a plurality of ventilation grooves are evenly and equidistantly provided on the placement plate.

[0018] A double-station helium gas filling and recovery leak detection method for automobile air-conditioning heat exchangers comprises the following steps: step 1, preparation before detection, determining and checking the detection device, and then placing the workpiece in the vacuum box and connecting the gas filling pipeline;

[0019] Step 2, start nitrogen detection, start the detection device and fill the workpiece with nitrogen through the inflation pipe;

[0020] Step 3: Start helium detection, start the detection device, and fill the workpiece with helium through the inflation pipeline. After the detection, recover the helium through the detection device;

[0021] Step 4: unload the workpiece, open the box cover and pull out the inflation pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention is different from the prior art. In actual use, the box cover is opened to drive the arc rod to deflect, thereby driving the gear plate five to rotate, thereby driving the gear plate four to rotate, thereby driving the shaft three to rotate, thereby driving the gear plate three to rotate, and then driving the gear plate two to rotate through the chain, thereby driving the shaft two to rotate, and then driving the gear plate one to rotate, thereby driving the rack one to move, and then driving the placement plate to move and drive the workpiece to extend out of the vacuum box, thereby preventing the user's head from easily hitting the box cover when placing or taking the exchanger, thereby increasing the user experience, conversely, closing the box cover to allow the placement plate to automatically retract into the vacuum box, while driving the gear plate six to roll along the rack two, thereby driving the shaft five to rotate, thereby driving the reel to rotate and wrap around the inflation pipe, thereby making the inflation pipe placement more orderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of the local cross-section structure;

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the local cross-section structure;

[0027] Figure 4 For the present invention Figure 3 Another structural diagram;

[0028] Figure 5 For the present invention Figure 4 Another structural diagram;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the local cross-section structure;

[0030] Figure 7 It is a schematic diagram of the process of the present invention.

[0031] In the figure: 1-control box; 11-inflation pipe; 12-detection box; 13-placing slot; 14-vacuum box; 15-box cover; 16-axis one; 2-placing plate; 3-linkage mechanism; 4-reel; 5-auxiliary mechanism; 17-guide rail; 18-fixed column; 31-axis two; 32-toothed disc one; 33-rack one; 34-toothed disc two; 35-axis three; 36-toothed disc three; 37-axis four; 38-toothed disc four; 39-toothed disc five; 41-arc rod; 42-tooth groove; 51-axis five; 52-toothed disc six; 53-rack two; 54-limiting hole; 55-ventilation slot. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-6The present invention provides a technical solution: a double-station helium inflation recovery leak detection device for an automobile air-conditioning heat exchanger, comprising a control box 1 and an inflation pipe 11. Both sides of the control box 1 are provided with detection boxes 12. Both detection boxes 12 are provided with placement slots 13. Both placement slots 13 are provided with vacuum boxes 14. The inflation pipe 11 is located in the vacuum box 14, and the vacuum box 14 is used to place workpieces. A box cover 15 is provided on the vacuum box 14. One end of the box cover 15 is fixedly connected with a shaft 16. The shaft 16 is rotatably connected to the inner wall of the detection box 12 through a bearing. A placement plate 2 is provided in the vacuum box 14. The placement plate 2 is used to place workpieces. A linkage mechanism 3 is provided on the side wall of the vacuum box 14. The box cover 15 is deflected to open and the linkage mechanism 3 is used to drive the placement plate 2 to move out of the vacuum box 14, so that the workpiece automatically moves out of the vacuum box 14, thereby preventing the user's head from easily hitting the box cover 15 when placing or taking the exchanger, thereby increasing the user experience.

[0034] A reel 4 is provided on the placement plate 2, and the inflation pipe 11 is wound on the reel 4, and an auxiliary mechanism 5 is provided on one side of the placement plate 2. The placement plate 2 is moved and retracted into the vacuum box 14, and the auxiliary mechanism 5 is used to drive the reel 4 to rotate and wind up the inflation pipe 11, so that the inflation pipe 11 can be placed more orderly.

[0035] Guide rails 17 are fixedly connected to both sides of the placement plate 2, and fixed columns 18 are fixedly connected to both sides of the bottom end of the inner wall of the vacuum box 14. The guide rails 17 pass through the fixed columns 18 and are slidably connected to the inner wall. One guide rail 17 passes through one fixed column 18 and slides along it to drive the placement plate 2 to move, thereby making the movement of the placement plate 2 more stable.

[0036] The linkage mechanism 3 includes a shaft 2 31 rotatably connected to the side wall of the vacuum box 14 through a bearing. One end of the shaft 2 31 located in the vacuum box 14 is fixedly connected to a toothed disc 1 32, and a rack 1 33 meshing with the toothed disc 1 32 is fixedly connected to the placement plate 2. The rotating shaft 2 31 drives the toothed disc 1 32 to rotate, thereby driving the rack 1 33 to move, and further driving the placement plate 2 to move;

[0037] One end of the second shaft 31 passes through the vacuum box 14 and is fixedly connected to the second gear disc 34. A third shaft 35 is rotatably connected to the side wall of the vacuum box 14 through a bearing. The third shaft 35 is fixedly connected to the third gear disc 36. The third gear disc 36 is connected to the second gear disc 34 through a chain. The rotating shaft 35 drives the third gear disc 36 to rotate, and then drives the second gear disc 34 to rotate through the chain, thereby driving the second shaft 31 to rotate.

[0038] A shaft 4 37 is rotatably connected to the side wall of the vacuum box 14 through a bearing, a gear disc 4 38 is fixedly connected to the shaft 35, and a gear disc 5 39 meshing with the gear disc 4 38 is fixedly connected to the shaft 4 37. Rotating the gear disc 5 39 drives the gear disc 4 38 to rotate, thereby driving the shaft 3 35 to rotate;

[0039] An arc rod 41 is fixedly connected to the outer side wall of the box cover 15. The arc rod 41 is designed to be coaxial with the shaft 16. A plurality of tooth grooves 42 that mesh with the gear plate 5 39 are evenly and equidistantly provided on the arc rod 41. Deflecting the box cover 15 drives the arc rod 41 to deflect, thereby driving the gear plate 5 39 to rotate.

[0040] The diameter of the toothed disc 36 is larger than that of the toothed disc 2 34 , so that the placement plate 2 can move relatively quickly.

[0041] The end of the arc rod 41 close to the box cover 15 is designed with a smooth arc surface, so that the placement plate 2 will not be moved during the initial period of time when the control box 1 is opened, thereby avoiding interference.

[0042] The auxiliary mechanism 5 includes a shaft 51 rotatably connected to the placement plate 2 via a bearing, one end of the shaft 51 is fixedly connected to the reel 4, one end of the shaft 51 passes through the placement plate 2 and is fixedly connected to a toothed disc 6 52, a rack 2 53 meshing with the toothed disc 6 52 is fixedly connected to the inner wall of the bottom end of the vacuum box 14, and the moving placement plate 2 drives the toothed disc 6 52 to roll along the rack 2 53, thereby driving the shaft 51 to rotate, thereby rotating the reel 4;

[0043] A limiting hole 54 is provided at one end of the reel 4 , and one end of the inflation pipe 11 passes through the limiting hole 54 and is wrapped and fixed by the limiting hole 54 .

[0044] The contact surface between the reel 4 and the inflation pipe 11 is designed with a flexible material to increase friction.

[0045] A plurality of ventilation grooves 55 are evenly and equidistantly formed on the placement plate 2 to relatively reduce the overall weight of the placement plate 2 .

[0046] During the normal operation of the double-station helium inflation recovery leak detection device for automobile air-conditioning heat exchangers, the box cover 15 is opened to drive the arc rod 41 to deflect, thereby driving the toothed disc 5 39 to rotate, thereby driving the toothed disc 4 38 to rotate, and then driving the shaft 35 to rotate, thereby driving the toothed disc 3 36 to rotate, and then driving the toothed disc 2 34 to rotate through the chain, thereby driving the shaft 2 31 to rotate, and then driving the toothed disc 1 32 to rotate, thereby driving the rack 1 33 to move, and then driving the placement plate 2 to move and drive the workpiece to extend out of the vacuum box 14, thereby preventing the user's head from easily hitting the box cover 15 when placing or taking the exchanger, thereby increasing the user experience, on the contrary, closing the box cover 15 allows the placement plate 2 to be automatically retracted into the vacuum box 14, and at the same time drives the toothed disc 6 52 to roll along the rack 2 53, thereby driving the shaft 5 51 to rotate, thereby driving the reel 4 to rotate and wrap around the inflation pipe 11, so that the inflation pipe 11 can be placed more orderly.

[0047] See also Figure 7, the present invention provides a technical solution: a double-station helium inflation recovery leak detection method for automobile air-conditioning heat exchanger, comprising the following steps: step 1, pre-detection preparation, determining and checking the detection device, and then placing the workpiece in a vacuum box 14 and connecting the inflation pipe 11;

[0048] Step 2: Start nitrogen detection, start the detection device and fill the workpiece with nitrogen through the filling pipe 11;

[0049] Step 3: Start helium detection, start the detection device and fill the workpiece with helium through the inflation pipe 11, and recover the helium through the detection device after the detection;

[0050] Step 4: unload the workpiece, open the box cover 15 and pull out the inflation pipe 11.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-station helium gas filling recovery leak detection device for an automobile air-conditioning heat exchanger, comprising a control box (1) and a gas filling pipeline (11), wherein both sides of the control box (1) are provided with a detection box (12), each of the two detection boxes (12) is provided with a placement groove (13), each of the placement grooves (13) is provided with a vacuum box (14), a box cover (15) is provided on the vacuum box (14), one end of the box cover (15) is provided with a shaft (16), and the shaft (16) is connected to the detection box (12), characterized in that: A placement plate (2) is arranged in the vacuum box (14), and a linkage mechanism (3) is arranged on the side wall of the vacuum box (14); the box cover (15) is deflected to open and the placement plate (2) is driven by the linkage mechanism (3) to move out of the vacuum box (14); A reel (4) is provided on the placement plate (2), and the inflation pipe (11) is wound on the reel (4), and an auxiliary mechanism (5) is provided on one side of the placement plate (2), and the placement plate (2) is moved and retracted into the vacuum box (14), and at the same time, the auxiliary mechanism (5) is used to drive the reel (4) to rotate and wind up the inflation pipe (11); Guide rails (17) are provided on both sides of the placement plate (2), and fixed columns (18) are provided on both sides of the vacuum box (14), and one guide rail (17) passes through one fixed column (18) and slides along the fixed column to drive the placement plate (2) to move; The linkage mechanism (3) comprises a second shaft (31) arranged on the vacuum box (14), a toothed disc (32) is arranged at one end of the second shaft (31), and a rack (33) meshing with the toothed disc (32) is arranged on the placement plate (2), and the placement plate (2) is driven to move by rotating the second shaft (31); One end of the second shaft (31) passes through the vacuum box (14) and is provided with a second gear disc (34); a third shaft (35) is provided on the side wall of the vacuum box (14); a third gear disc (36) is provided on the third shaft (35); the third gear disc (36) is connected to the second gear disc (34) by a chain; rotating the third shaft (35) drives the second shaft (31) to rotate; A shaft four (37) is arranged on the side wall of the vacuum box (14), a toothed disc four (38) is arranged on the shaft three (35), and a toothed disc five (39) meshing with the toothed disc four (38) is arranged on the shaft four (37), and the rotation of the toothed disc five (39) drives the shaft three (35) to rotate; An arc-shaped rod (41) is arranged on the side wall of the box cover (15), and a plurality of tooth grooves (42) are evenly and equidistantly formed on the arc-shaped rod (41) for engaging with the toothed disc (39). The box cover (15) is deflected to drive the toothed disc (39) to rotate; The auxiliary mechanism (5) comprises a fifth shaft (51) arranged on the placement plate (2), one end of the fifth shaft (51) is fixed to the reel (4), one end of the fifth shaft (51) passes through the placement plate (2) and is provided with a sixth toothed disc (52), a second rack (53) meshing with the sixth toothed disc (52) is provided at the bottom end of the vacuum box (14), and the placement plate (2) is moved to drive the sixth toothed disc (52) to roll along the second rack (53), so that the reel (4) rotates; A limiting hole (54) is provided at one end of the reel (4), and one end of the inflation pipe (11) passes through the limiting hole (54).

2. The double-station helium gas filling recovery leak detection device for automobile air-conditioning heat exchanger according to claim 1 is characterized in that: The toothed disc three (36) is designed to have a diameter greater than that of the toothed disc two (34).

3. The double-station helium gas filling recovery leak detection device for automobile air-conditioning heat exchanger according to claim 2 is characterized in that: The end of the arc-shaped rod (41) close to the box cover (15) adopts a smooth arc surface design.

4. The double-station helium gas filling recovery leak detection device for automobile air-conditioning heat exchanger according to claim 1 is characterized in that: The contact surface between the reel (4) and the inflation pipe (11) is designed with a flexible material.

5. The double-station helium gas filling recovery leak detection device for automobile air-conditioning heat exchanger according to claim 4 is characterized in that: The placement plate (2) is provided with a plurality of ventilating grooves (55) at even intervals.

6. A double-station helium gas charging and recovery leak detection method for automobile air-conditioning heat exchangers applicable to the double-station helium gas charging and recovery leak detection device for automobile air-conditioning heat exchangers as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Preparation before testing: determine and check the testing device, then place the workpiece in the vacuum box (14) and connect it to the inflation pipe (11); Step 2, start nitrogen detection, start the detection device and fill the workpiece with nitrogen through the inflation pipe (11); Step 3, starting helium detection, starting the detection device and filling the workpiece with helium through the inflation pipe (11), and recovering the helium through the detection device after the detection is completed; Step 4: unload the workpiece, open the box cover (15) and pull out the inflation pipe (11).

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