Automobile air conditioner pipeline air tightness detection equipment

Abstract

This utility model relates to the field of airtightness testing technology and aims to provide an airtightness testing device for automotive air conditioning pipes. The device includes a piping system, a cleaning component, an airtightness testing component, a connecting component, and a sealing component. The piping system includes a main pipe and several branch pipes connected to the main pipe, used for simultaneously testing several air conditioning pipes. The connecting component connects the branch pipes and the air conditioning pipes. The cleaning component is used to introduce high-pressure water into the main pipe and branch pipes to flush the inner walls of the air conditioning pipes. The airtightness testing component is used to introduce high-pressure gas into the main pipe and branch pipes to perform airtightness testing on the air conditioning pipes connected to the branch pipes. The beneficial effect of this utility model is that after the air conditioning pipes are clamped, they can be cleaned and tested for airtightness separately by the cleaning component and the airtightness testing component, requiring only one clamping operation, eliminating repetitive steps and greatly improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and more specifically, to an airtightness testing device for automotive air conditioning ducts. Background Technology

[0002] Automotive air conditioning ducts are used to systematically connect disparate components such as the compressor and evaporator, forming a complete automotive air conditioning system that operates in an orderly manner. The entire air conditioning duct system requires a sealed environment; leaks are unacceptable as they could reduce overall cooling or heating efficiency.

[0003] Therefore, during the production process, it is necessary to conduct airtightness tests on the automotive air conditioning pipes to ensure the cleanliness requirements of the pipes, ensure that there are no leaks in the air conditioning pipes, and meet the quality performance requirements.

[0004] Existing airtightness testing equipment for air conditioning ducts typically uses a simple setup: one end is connected to a high-pressure gas inlet, and the other end is sealed to create a tight seal. High-pressure gas is then introduced to detect leaks. This type of device requires tightening a nut at the interface, resulting in low testing efficiency.

[0005] Meanwhile, the cleaning and flushing process inside the pipeline requires high-pressure flushing of the inner wall and repeated manual feeding, resulting in high manufacturing costs and low production efficiency. Utility Model Content

[0006] In view of the problems existing in the prior art, this utility model provides an airtightness testing device for automotive air conditioning pipes to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automotive air conditioning duct air tightness testing device, comprising a pipeline system, a cleaning component, an air tightness testing component, a connecting component, and a sealing component. The pipeline system includes a main pipeline and several branch pipelines connected to the main pipeline, used for simultaneously testing several air conditioning ducts. The connecting component connects the branch pipelines and the air conditioning ducts. The cleaning component is used to introduce high-pressure water into the main pipeline and branch pipelines to flush the inner walls of the air conditioning ducts. The sealing component is used to seal the end of the air conditioning duct furthest from the branch pipeline during air tightness testing. The air tightness testing component is used to introduce high-pressure gas into the main pipeline and branch pipelines to test the air tightness of the air conditioning ducts connected to the branch pipelines.

[0008] By adopting the above technical solution, after the air conditioning duct is clamped, it can be cleaned and tested for air tightness by the cleaning component and the air tightness testing component respectively. Only one clamping is required, avoiding repeated steps and greatly improving production efficiency.

[0009] The present invention is further configured such that the connecting component consists of a quick connector and a sealing gasket. The quick connector includes a female end interface and a male end interface, wherein the female end interface is connected to a branch pipe, the male end interface is connected to an air conditioning pipe, the male end interface and the female end interface are snapped together, and the sealing gasket is installed inside the female end interface and abuts against the end face of the male end interface to improve the sealing performance at the connection between the male end interface and the female end interface.

[0010] The present invention is further configured such that the sealing assembly includes a fixed plate, a positioning seat, a flat-pressure quick clamp, and a sealing plug. The positioning seat and the flat-pressure quick clamp are fixed on the fixed plate, and the sealing plug is installed on the flat-pressure quick clamp for contacting and sealing the opening of the air conditioning duct. The positioning seat is used to limit the movement of the air conditioning duct so that the flat-pressure quick clamp can drive the sealing plug to seal the opening of the air conditioning duct.

[0011] The present invention is further configured such that the cleaning assembly includes a water tank, a high-pressure water pump, and a water pressure gauge, wherein the inlet of the high-pressure water pump is connected to the water tank through a pipe, the outlet of the high-pressure water pump is connected to the main pipe, and the water pressure gauge is used to detect the pressure value in the water circuit.

[0012] The present invention is further configured such that the airtightness detection component includes an air booster pump and an air pressure gauge, wherein the air inlet of the air booster pump is connected to the atmosphere or an air source, the air outlet of the air booster pump is connected to the main pipeline, and the air pressure gauge is used to detect the pressure value in the air path.

[0013] The present invention is further configured such that the water outlet of the high-pressure water pump, the air outlet of the air booster pump, and the main pipeline are connected, and an electromagnetic control valve is provided at the connection point of the three, which is used to control the connection between the main pipeline and the high-pressure water pump or the air booster pump, so as to control the air conditioning pipeline to be cleaned or tested for air tightness.

[0014] The present invention is further configured such that a main water valve is provided at the inlet end of the high-pressure water pump, which is used to control the opening and closing of the cleaning component pipeline.

[0015] The present invention is further configured such that the water pressure gauge is installed between the high-pressure water pump and the electromagnetic control valve.

[0016] The present invention is further configured such that a pressure regulating switch and a main air valve are provided between the air outlet of the air booster pump and the electromagnetic control valve, and the pressure regulating switch, the main air valve and the air pressure gauge are arranged sequentially from the air booster pump to the electromagnetic control valve.

[0017] Compared with the prior art, this utility model provides an airtightness testing device for automotive air conditioning pipes, which has the following beneficial effects: 1. After the air conditioning duct is clamped, it can be cleaned and tested for air tightness by the cleaning component and the air tightness testing component respectively. Only one clamping is required, avoiding repeated steps and greatly improving production efficiency.

[0018] 2. Branch pipes and air conditioning pipes are quickly connected by quick couplings, which effectively improves clamping efficiency, flushing efficiency and airtightness testing efficiency.

[0019] 3. When the air tightness of the air conditioning duct is tested, the end away from the branch duct is quickly sealed by a flat-pressure quick clamp that drives the sealing plug to seal the air conditioning duct, which has high clamping efficiency. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of an automotive air conditioning duct airtightness testing device; Figure 2 A schematic diagram of the water tank and piping system; Figure 3 This is a schematic diagram of the overall structure of the airtightness testing equipment; Figure 4 This is an exploded view of the connecting components; Figure 5 This is a cross-sectional view of the connecting components. Figure 6 A schematic diagram of the connection between the sealing component and the air conditioning duct (the air conditioning duct is only a partial schematic diagram). Figure 7 This is a schematic diagram of the sealing component.

[0021] In the diagram: 1. Piping system; 101. Main pipeline; 102. Branch pipeline; 103. Single-channel pressure gauge; 104. Single-channel pressure valve; 2. Cleaning assembly; 201. Water tank; 202. High-pressure water pump; 203. Water pressure gauge; 3. Air tightness testing assembly; 301. Air booster pump; 302. Air pressure gauge; 4. Connection assembly; 401. Female connector; 4011. First through hole; 4012. Second through hole; 4013. Through groove; 4014. Eccentric protrusion 4015. Wheel; 402. Handle; 402. Male end interface; 4021. Annular snap-fit ​​groove; 403. Sealing gasket; 5. Sealing assembly; 501. Fixing plate; 502. Positioning seat; 503. Flat-pressure quick clamp; 5031. Fixing seat; 5032. Push-pull rod; 5033. Extrusion rod; 5034. Connecting rod; 5035. Limiting groove; 504. Sealing plug; 6. Electromagnetic control valve; 7. Water main valve; 8. Pressure regulating switch; 9. Gas main valve; 10. Support plate. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0026] The automotive air conditioning duct air tightness testing equipment includes a duct system 1, a cleaning component 2, an air tightness testing component 3, a connecting component 4, and a sealing component 5. The cleaning component 2 and the air tightness testing component 3 are both connected to the duct system 1. The duct system 1 is connected to one end of the air conditioning duct through the connecting component 4, and the sealing component 5 is connected to the other end of the air conditioning duct and seals it.

[0027] The pipeline system 1 is used to connect several air conditioning pipes simultaneously. The connecting component 4 connects the branch pipe 102 and the air conditioning pipe. The cleaning component 2 is used to introduce high-pressure water into the main pipeline 101 and the branch pipe 102 to flush the inner wall of the air conditioning pipe. The sealing component 5 is used to seal the end of the air conditioning pipe away from the branch pipe 102 during air tightness testing. The air tightness testing component 3 is used to introduce high-pressure gas into the main pipeline 101 and the branch pipe 102 to test the air tightness of the air conditioning pipe connected to the branch pipe 102.

[0028] Specifically, the piping system 1 includes a main pipeline 101 and several branch pipelines 102 connected to the main pipeline 101. One end of the branch pipeline 102 is connected to the air conditioning pipeline via a connecting component 4, and the other end of the air conditioning pipeline is sealed via a sealing component 5. The cleaning component 2 and the air tightness detection component 3 are both connected to the main pipeline 101, and an electromagnetic control valve 6 is installed at the connection point of the three to switch the connection state, namely "cleaning component 2-main pipeline 101" or "air tightness detection component 3-main pipeline 101". Each branch pipeline 102 is equipped with a single-channel pressure gauge 103 and a single-channel pressure valve 104.

[0029] like Figure 4-5 As shown, the connecting assembly 4 consists of a quick connector and a sealing gasket 403, wherein the quick connector is preferably a C-type quick connector.

[0030] Specifically, the quick connector includes a female connector 401 and a male connector 402. The female connector 401 has a first through hole 4011 and a second through hole 4012 that are coaxially connected. The diameter of the first through hole 4011 is larger than the diameter of the second through hole 4012. The diameter of the male connector 402 is slightly smaller than the diameter of the first through hole 4011 but larger than the diameter of the second through hole 4012. The outer wall of the male connector 402 has an annular snap-fit ​​groove 4021 with an arc-shaped cross-section. The side wall of the first through hole 4011 of the female connector 401 has a through groove 4013. An eccentric cam 4014 is rotatably mounted in the through groove 4013. A handle 4015 extending to the outside of the female connector 401 is fixed on the eccentric cam 4014.

[0031] In practical applications, the female end interface 401 is welded to the branch pipe 102, and the male end interface 402 is welded to the air conditioning pipe or integrally formed. The sealing gasket 403 is installed in the female end interface 401 and abuts against the end face of the male end interface 402 to seal the connection between the male end interface 402 and the female end interface 401. When the male end interface 402 is inserted into the female end interface 401, the eccentric cam 4014 can be rotated by turning the handle 4015 to gradually squeeze the annular snap-fit ​​groove 4021 of the male end interface 402 and clamp and fix it, so as to realize the quick snap-fit ​​between the female end interface 401 and the male end interface 402.

[0032] In practical applications, the female end interface 401 can be connected to the branch pipe 102 by screwing, and the male end interface 402 can be pre-screwed to the air conditioning pipe. This allows for quick connection during the air tightness test and separation after the test. This method does not require changing the original structure of the air conditioning pipe.

[0033] like Figure 6-7As shown, the sealing assembly 5 includes a fixing plate 501, a positioning seat 502, a flat-pressure quick clamp 503, and a sealing plug 504. The positioning seat 502 and the flat-pressure quick clamp 503 are fixed on the fixing plate 501. The sealing plug 504 is installed on the flat-pressure quick clamp 503 and is used to contact and seal the opening of the air conditioning duct. The positioning seat 502 is used to limit the air conditioning duct so that the flat-pressure quick clamp 503 can drive the sealing plug 504 to seal the opening of the air conditioning duct.

[0034] The flat-pressure quick clamp 503 includes a fixed base 5031, a push-pull rod 5032, a pressing rod 5033, and a connecting rod 5034. The fixed base 5031 is mounted on a fixed plate 501. The push-pull rod 5032 is rotatably connected to the fixed base 5031. The pressing rod 5033 is horizontally arranged, passes through the fixed base 5031, and is slidably connected to the fixed base 5031. One end of the pressing rod 5033 is movably connected to the push-pull rod 5032 through the connecting rod 5034. The connection points of the connecting rod 5034 with the push-pull rod 5032 and the pressing rod 5033 are all rotatably connected. When the push-pull rod 5032 rotates around its connection point with the fixed base 5031, it drives the pressing rod 5033 to move laterally and reciprocally through the connecting rod 5034.

[0035] Specifically, the end of the extrusion rod 5033 away from the connecting rod 5034 is fixedly connected to the sealing plug 504. The positioning seat 502 is provided with a limiting groove 5035 adapted to the air conditioning pipe. The air conditioning pipe is placed in the limiting groove 5035, and the pipe opening is placed between the positioning seat 502 and the sealing plug 504. When the push-pull rod 5032 is pulled, it drives the extrusion rod 5033 to move laterally through the connecting rod 5034, and drives the sealing plug 504 to approach the pipe opening of the air conditioning pipe, squeezing and fixing the pipe opening between the sealing plug 504 and the positioning seat 502.

[0036] like Figure 1-3 As shown, the cleaning assembly 2 includes a water tank 201, a high-pressure water pump 202, and a water pressure gauge 203. The inlet of the high-pressure water pump 202 is connected to the water tank 201 through a pipe, and the outlet of the high-pressure water pump 202 is connected to the main pipeline 101. The water pressure gauge 203 is used to detect the pressure value in the water circuit. The inlet of the high-pressure water pump 202 is equipped with a main water valve 7, which is used to control the opening and closing of the pipes of the cleaning assembly 2. The water pressure gauge 203 is located between the high-pressure water pump 202 and the solenoid control valve 6.

[0037] Specifically, a support plate 10 is installed on the water tank 201. The support plate 10 is used to install the sealing component 5 and air conditioning pipes, etc. The support plate 10 has several micro holes to allow the water sprayed during the cleaning process to flow back into the water tank 201 for recycling.

[0038] Specifically, a purification device can be added to the water tank 201 to purify the water flowing back into the water tank 201 before introducing it into the high-pressure water pump 202 for circulation.

[0039] In actual use, the water tank 201 is pre-filled with cleaning water. The high-pressure water pump 202 draws water out of the water tank 201 and transports it to the main pipeline 101 through the pipeline. Finally, it is introduced into each air conditioning pipe through the branch pipeline 102 to flush and clean the inner wall of the air conditioning pipe. The water is discharged from the other end of the air conditioning pipe and flows back to the water tank 201 through the micro-holes of the support plate 10 for reuse.

[0040] like Figure 1 and 3 As shown, the airtightness detection component 3 includes an air booster pump 301 and an air pressure gauge 302. The air inlet of the air booster pump 301 is connected to the atmosphere or an air source, and the air outlet of the air booster pump 301 is connected to the main pipeline 101. A pressure regulating switch 8 and a main air valve 9 are provided between the air outlet of the air booster pump 301 and the solenoid control valve 6. The pressure regulating switch 8, the main air valve 9, and the air pressure gauge 302 are arranged sequentially from the air booster pump 301 to the solenoid control valve 6. The air pressure gauge 302 is used to detect the pressure value in the air path.

[0041] Specifically, the air booster pump 301 is used to deliver air from the atmosphere or an air source into the air conditioning duct and maintain a certain pressure value. By observing whether the pressure value decreases, it can be determined whether there is a leak in the air conditioning duct.

[0042] The specific testing steps of the automotive air conditioning pipe air tightness testing equipment disclosed in this utility model embodiment are as follows: First, insert the male end interface 402 of several air conditioning pipes into the female end interface 401 of the corresponding branch pipe 102. The C-type quick connector enables the air conditioning pipes and branch pipes 102 to be quickly connected. After the connection is completed, the electromagnetic control valve 6 controls the main pipeline 101 to connect with the cleaning component 2, and turns on the high-pressure water pump 202 to extract water from the water tank 201 and deliver it to the main pipeline 101 and the corresponding branch pipes 102 to rinse the inner wall of the air conditioning pipes. The rinsed water returns to the water tank 201 through the micropores on the support plate 10 for reuse.

[0043] Secondly, when conducting an airtightness test on the air conditioning duct, first use the sealing component 5 to seal the other end of the duct. Then, turn on the air booster pump 301 to send air into the duct until the pressure reaches the preset value. At this point, close the single-path pressure testing valve 104 on the branch pipe 102 and the air booster pump 301 to maintain the air pressure inside the duct. Observe whether the air pressure drops. If it drops, the corresponding air conditioning duct is leaking, or there is a leak at the connection point. If it does not drop, it indicates that the air conditioning duct is not leaking. Disassemble the air conditioning duct that has passed the airtightness test and distinguish between good and defective products. Defective products can be repeatedly tested to eliminate the possibility of leakage at the clamping points.

[0044] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing device for automotive air conditioning ducts, characterized in that: It includes a piping system (1), a cleaning assembly (2), an airtightness testing assembly (3), a connection assembly (4), and a sealing assembly (5), wherein, The piping system (1) includes a main pipeline (101) and several branch pipelines (102) connected to the main pipeline (101), used for simultaneously inspecting several air conditioning ducts. The connecting component (4) connects the branch pipe (102) and the air conditioning pipe. The cleaning assembly (2) is used to introduce high-pressure water flow into the main pipeline (101) and branch pipelines (102) to flush the inner walls of the air conditioning ducts. The sealing assembly (5) is used to seal the end of the air conditioning duct away from the branch duct (102) during airtightness testing. The air tightness testing component (3) is used to introduce gas into the main pipeline (101) and the branch pipeline (102) to test the air tightness of the air conditioning pipeline connected to the branch pipeline (102).

2. The automotive air conditioning duct air tightness testing equipment according to claim 1, characterized in that, The connecting component (4) includes a female connector (401), a male connector (402), and a sealing gasket (403). The female connector (401) is connected to the branch pipe (102), and the male connector (402) is connected to the air conditioning pipe. The male connector (402) and the female connector (401) are engaged. The sealing gasket (403) is installed inside the female end interface (401) and abuts against the end face of the male end interface (402).

3. The automotive air conditioning duct air tightness testing equipment according to claim 1, characterized in that, The sealing assembly (5) includes a fixing plate (501), a positioning seat (502), a flat-pressure quick-release clamp (503), and a sealing plug (504), wherein, The positioning seat (502) and the flat-press quick clamp (503) are fixed on the fixing plate (501). The positioning seat (502) is used to limit the movement of the air conditioning duct. The sealing plug (504) is installed on the flat-pressure quick-release clamp (503) for contacting and sealing the opening of the air conditioning duct. A flat-pressure quick clamp (503) is used to drive the sealing plug (504) to the opening of the air conditioning duct.

4. The automotive air conditioning duct air tightness testing equipment according to claim 1, characterized in that, The cleaning assembly (2) includes a water tank (201), a high-pressure water pump (202), and a water pressure gauge (203). The inlet of the high-pressure water pump (202) is connected to the water tank (201) through a pipe, and the outlet of the high-pressure water pump (202) is connected to the main pipeline (101). The water pressure gauge (203) is used to detect the pressure value in the water circuit.

5. The automotive air conditioning duct airtightness testing equipment according to claim 4, characterized in that, The airtightness detection component (3) includes an air booster pump (301) and an air pressure gauge (302). The air inlet of the air booster pump (301) is connected to the atmosphere or an air source, and the air outlet of the air booster pump (301) is connected to the main pipeline (101). The air pressure gauge (302) is used to detect the pressure value in the air path.

6. The automotive air conditioning duct airtightness testing equipment according to claim 5, characterized in that, The water outlet of the high-pressure water pump (202), the air outlet of the air booster pump (301), and the main pipeline (101) are connected, and an electromagnetic control valve (6) is provided at the connection point.

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