Automobile air conditioner valve testing device

Abstract

The utility model discloses a kind of automobile air conditioner valve test equipment, it is related to valve testing equipment technical field.Like water mechanism, including water tank, water storage tank, the circulating water pump being set on the water storage tank;Product limiting mechanism, including L type support frame, the limiting frame being set on the L type support frame, the moving plate between the limiting frame and L type support frame is set.In use, the inlet pipe of product extends to the inside of several elastic plates in sealing test mechanism, sealing electric push rod, sealing outer ring, sealing gasket and several elastic plates are sealed to the connecting pipe and the connecting place of product inlet pipe by cooperation, avoid sealing gasket directly with product inlet pipe end port position contact, guarantee the sealing effect between equipment and product, again can avoid broken sealing gasket into the inlet pipe of product, effectively solve the problem that traditional equipment exists broken rubber residue stagnates in valve body inner cavity, causes subsequent assembly pollution or flow passage blockage.

Description

Technical Field

[0001] This utility model relates to the technical field of valve testing equipment, and in particular to a testing device for automotive air conditioning valves. Background Technology

[0002] Valves in automotive air conditioning systems are core components for refrigerant circulation control. Among them, the expansion valve senses the evaporator outlet temperature through a temperature-sensing bulb and automatically adjusts the refrigerant flow, directly impacting the air conditioning cooling efficiency. As the boundary between high and low pressure, the expansion valve must possess precise throttling and pressure reduction capabilities and flow control to prevent compressor liquid slugging and adapt to different operating conditions. During production, to ensure valve sealing and flow regulation accuracy, an airtightness test is performed on the valve body using an air immersion water method.

[0003] Existing testing equipment generally uses rubber seals to ventilate the valve inlet pipe and seal the connection. Repeated contact and collision between the rubber seals and the end of the inlet pipe can easily cause cracks or even breakage. This not only leads to seal failure and affects testing accuracy, but broken rubber residue may also remain inside the valve body, causing contamination during subsequent assembly or blockage of the flow channel. Utility Model Content

[0004] The purpose of this invention is to provide an automotive air conditioning valve testing device, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automotive air conditioning valve testing device, comprising, The immersion mechanism includes an immersion tank, a water storage tank, a circulating water pump installed on the water storage tank, a water supply pipe installed at the output end of the circulating water pump, and a drain pipe for connecting the immersion tank and the water storage tank. The product limiting mechanism includes an L-shaped support frame, a limiting frame disposed on the L-shaped support frame, a movable plate disposed between the limiting frame and the L-shaped support frame, an annular abutment piece disposed on the rear side of the limiting frame, a support spring disposed at the lower end of the annular abutment piece, a connecting frame disposed on the rear side of the annular abutment piece and fixedly connected to the L-shaped support frame, and a sealing test mechanism disposed between the movable plate and the limiting frame. The vibration mechanism is located between the immersion tank and the lower side wall of the L-shaped support frame.

[0006] Preferably, the product limiting mechanism includes a through hole opened on the L-shaped support frame, a limiting slide rod two whose upper end is fixedly connected to the annular abutment piece, a baffle two whose lower end is fixedly connected to the limiting slide rod two, and a limiting groove opened on the limiting frame.

[0007] Preferably, the sealing test mechanism includes a connecting pipe fixed to the rear side of the moving plate, a sealing outer ring sleeved on the connecting pipe, a sealing electric push rod fixed to the front side of the moving plate and fixedly connected to the sealing outer ring, a plurality of elastic plates fixed to the rear end of the connecting pipe, a sealing gasket disposed inside the plurality of elastic plates, and an air pump disposed in front of the immersion tank. The rear ends of several of the elastic plates extend away from the sealing gasket.

[0008] Preferably, the output end of the air pump is connected to an air pipe, and the end of the air pipe away from the air pump passes through the movable plate and is connected to the connecting pipe. The air pipe is a flexible tube. Two baffles are provided inside the immersion tank. A limiting slide rod is fixedly connected to the front side of the baffle. The front end of the limiting slide rod passes through the movable plate and is fixedly connected to the front inner wall of the L-shaped support frame. Auxiliary plates are fixedly connected to the inner walls on both the left and right sides of the immersion tank. A baffle is provided above the auxiliary plates. A limiting slide rod is fixedly connected to the lower end of the baffle. The lower end of the limiting slide rod passes through the auxiliary plates and is fixedly connected to the lower inner wall of the L-shaped support frame. An abutment spring is sleeved on the limiting slide rod. The upper and lower ends of the abutment spring are fixedly connected to the auxiliary plate and the adjacent side wall of the L-shaped support frame, respectively. A movable electric push rod is fixedly connected to the front end of the L-shaped support frame, and the output end of the movable electric push rod passes through the L-shaped support frame and is fixedly connected to the front end of the movable plate.

[0009] Preferably, the vibration mechanism includes a partition plate fixed to the bottom of the L-shaped support frame, a horizontal plate disposed below the L-shaped support frame, a vibration motor disposed on the front side of the immersion tank, and a vibration cam disposed below the horizontal plate. The number of partition plates is two, and the left and right ends of the horizontal plate are fixed between the two partition plates. A rotating rod is fixedly connected to the front end of the vibrating cam, and the end of the rotating rod is fixedly connected to the output end of the vibrating motor.

[0010] Preferably, an L-shaped external auxiliary frame is fixedly connected to the rear end of the immersion tank, and a lifting electric push rod is fixedly connected to the upper end of the external auxiliary frame. The output end of the lifting electric push rod passes through the upper side wall of the external auxiliary frame and is fixedly connected to a lifting plate. The rear end of the lifting plate abuts against the inner rear wall of the external auxiliary frame. A temperature control tube is provided at the lower end of the lifting plate. A limiting hole is opened on the upper side wall of the connecting frame, and a limiting ring is provided inside the limiting hole. The temperature control tube is located directly above the limiting ring.

[0011] Compared with related technologies, the automotive air conditioning valve testing device provided by this utility model has the following advantages: 1. This utility model provides an automotive air conditioning valve testing device. In use, the product's inlet pipe extends to the inner side of several elastic plates in the sealing testing mechanism. The connection between the connecting pipe and the product's inlet pipe is sealed by the cooperation of the sealing electric push rod, sealing outer ring, sealing gasket, and several elastic plates. This prevents the sealing gasket from directly contacting the product's inlet pipe port, ensuring the sealing effect between the device and the product while preventing broken sealing gaskets from entering the product's inlet pipe. This effectively solves the problem of broken rubber residue remaining in the valve body cavity in traditional equipment, causing subsequent assembly contamination or flow channel blockage.

[0012] 2. This utility model provides an automotive air conditioning valve testing device. The device is equipped with a product limiting mechanism to limit the product to be tested. A vibration mechanism is set between the lower side wall of the immersion tank and the lower side wall of the L-shaped support frame to simulate the mechanical vibration of the vehicle during driving, thereby verifying the reliability of the valve under complex working conditions. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the immersion tank of this utility model; Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 for Figure 2 Enlarged view of a section at point B in the middle; Figure 5 for Figure 2 Enlarged view of a section at point C; Figure 6 This is a schematic diagram showing the structure of the sealing gasket of this utility model; Figure 7 This is a schematic diagram illustrating the structure of the vibration mechanism of this utility model; Figure 8 for Figure 7 Enlarged view of a section at point D.

[0014] In the diagram: 1. Immersion tank; 2. Water storage tank; 3. Circulating water pump; 4. Water supply pipe; 5. Drainage pipe; 6. L-shaped support frame; 7. Movable plate; 8. Movable electric push rod; 9. Limiting slide rod one; 10. Baffle one; 11. Sealing electric push rod; 12. Connecting pipe; 13. Elastic plate; 14. Sealing gasket; 15. Air guide pipe; 16. Air pump; 17. Sealing outer ring; 18. Annular abutment piece; 19. Limiting slide rod two; 20. Temperature... 21. Degree control tube; 22. Support spring; 23. Limiting frame; 24. Limiting groove; 25. Connecting frame; 26. Limiting hole; 27. Limiting ring; 28. Limiting slide rod three; 29. ​​Auxiliary plate; 30. Baffle three; 31. Abutment spring; 32. Through hole; 33. Partition plate; 34. Horizontal plate; 35. Vibration motor; 36. Rotating rod; 37. Vibration cam; 38. External auxiliary frame; 39. Lifting electric push rod; 30. Lifting plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-8 This utility model provides a technical solution: an automotive air conditioning valve testing device, comprising, The immersion mechanism includes an immersion tank 1, a water storage tank 2, a circulating water pump 3 installed on the water storage tank 2, a water supply pipe 4 installed at the output end of the circulating water pump 3, and a drain pipe 5 for connecting the immersion tank 1 and the water storage tank 2. Both the water supply pipe 4 and the drain pipe 5 are equipped with solenoid valves. When filling the immersion tank 1 with water, the solenoid valves on the circulating water pump 3 and the water supply pipe 4 are opened, and the solenoid valve on the drain pipe 5 is closed. When draining water, the solenoid valve on the drain pipe 5 is opened, and the solenoid valves on the circulating water pump 3 and the water supply pipe 4 are closed. The product limiting mechanism includes an L-shaped support frame 6, a limiting frame 22 disposed on the L-shaped support frame 6, a movable plate 7 disposed between the limiting frame 22 and the L-shaped support frame 6, an annular abutment piece 18 disposed on the rear side of the limiting frame 22, a support spring 21 disposed at the lower end of the annular abutment piece 18, a connecting frame 24 disposed on the rear side of the annular abutment piece 18 and fixedly connected to the L-shaped support frame 6, and a sealing test mechanism disposed between the movable plate 7 and the limiting frame 22. The product limiting mechanism includes a through hole 31 on the L-shaped support frame 6, a limiting slide bar 19 fixedly connected to the upper end of the annular abutment piece 18, a baffle 2 fixedly connected to the lower end of the limiting slide bar 19, and a limiting groove 23 on the limiting frame 22. In use, the outlet pipe of the expansion valve product is passed through the annular abutment piece 18 and the through hole 31, and the annular abutment piece 18 is pressed down. Then the expansion valve product is rotated to move the inlet pipe of the expansion valve into the limiting insert on the limiting frame 22. After the expansion valve is released, the stability of the expansion valve is ensured by the action of the support spring 21. The sealing test mechanism includes a connecting pipe 12 fixed to the rear side of the moving plate 7, a sealing outer ring 17 sleeved on the connecting pipe 12, a sealing electric push rod 11 fixed to the front side of the moving plate 7 and fixedly connected to the sealing outer ring 17, several elastic plates 13 fixed to the rear end of the connecting pipe 12, a sealing gasket 14 disposed inside the several elastic plates 13, and an air pump 16 disposed in front of the immersion tank 1. The rear ends of the several elastic plates 13 are all extended away from the sealing gasket 14. When the expansion valve inlet pipe is located inside the several elastic plates 13, the sealing electric push rod 11 pushes the sealing outer ring 17 to move towards the expansion valve. The sealing outer ring 17 squeezes the several elastic plates 13, and then the sealing gasket 14 seals the connection between the elastic plates 13 and the expansion valve inlet pipe. The output end of the air pump 16 is connected to the air pipe 15. The end of the air pipe 15 away from the air pump 16 passes through the moving plate 7 and is connected to the connecting pipe 12. The air pipe 15 is a flexible tube. Two baffles 10 are provided inside the immersion tank 1. The front side of the baffle 10 is fixedly connected to the limiting slide rod 9. The front end of the limiting slide rod 9 passes through the moving plate 7 and is fixedly connected to the front inner wall of the L-shaped support frame 6. The inner walls of the left and right sides of the immersion tank 1 are fixedly connected to the auxiliary plates 28. The baffle 29 is provided above the auxiliary plates 28. The lower end of the baffle 29 is fixedly connected to the limiting slide rod 27. The lower end of the limiting slide rod 27 passes through the auxiliary plates 28 and is fixedly connected to the lower inner wall of the L-shaped support frame 6. The limiting slide rod 27 is fitted with an abutment spring 30. The upper and lower ends of the abutment spring 30 are fixedly connected to the auxiliary plates 28 and the adjacent side walls of the L-shaped support frame 6, respectively. A movable electric push rod 8 is fixedly connected to the front end of the L-shaped support frame 6. The output end of the movable electric push rod 8 passes through the L-shaped support frame 6 and is fixedly connected to the front end of the movable plate 7. The movable electric push rod 8 can move the sealing test mechanism to the inlet pipe position of the expansion valve during product testing. The vibration mechanism includes a partition plate 32 fixed to the bottom of the L-shaped support frame 6, a horizontal plate 33 set below the L-shaped support frame 6, a vibration motor 34 set in front of the immersion tank 1, and a vibration cam 36 set below the horizontal plate 33. There are two partition plates 32. The left and right ends of the horizontal plate 33 are fixed between the two partition plates 32. A rotating rod 35 is fixedly connected to the front end of the vibration cam 36. The end of the rotating rod 35 is fixedly connected to the output end of the vibration motor 34. The vibration motor 34 drives the rotating rod 35 and the vibration cam 36 to rotate. The vibration cam 36 drives the product limiting mechanism and the expansion valve to vibrate, which can simulate the mechanical vibration of the vehicle during driving, and thus verify the reliability of the valve under complex working conditions. An L-shaped external auxiliary frame 37 is fixedly connected to the rear end of the immersion tank 1. A lifting electric push rod 38 is fixedly connected to the upper end of the external auxiliary frame 37. The output end of the lifting electric push rod 38 passes through the upper side wall of the external auxiliary frame 37 and is fixedly connected to a lifting plate 39. The rear end of the lifting plate 39 abuts against the inner rear wall of the external auxiliary frame 37. A temperature control tube 20 is provided at the lower end of the lifting plate 39. A limiting hole 25 is opened on the upper side wall of the connecting frame 24. A limiting ring 26 is provided inside the limiting hole 25. The temperature control tube 20 is located directly above the limiting ring 26. When it is necessary to test the temperature sensing bulb structure, the lifting electric push rod 38 is used to push the lifting plate 39 and the temperature control tube 20 downward. The temperature control tube 20 can be moved to the outside of the temperature sensing bulb. The environment outside the temperature sensing bulb is heated by the electric heating wire. When the temperature is heated to the set temperature required for the expansion valve to open, bubbles are generated at the outlet pipe of the expansion valve, indicating that the expansion valve product quality is normal.

[0017] Working principle: In use, the outlet pipe of the expansion valve is passed through the annular abutment piece 18 and the through hole 31, and the annular abutment piece 18 is pressed down. Then, the expansion valve is rotated to move the inlet pipe of the expansion valve into the limiting insert on the limiting frame 22. After the expansion valve is released, the stability of the expansion valve is ensured by the support spring 21. At the same time, the temperature sensing ball on the expansion valve is placed inside the limiting ring 26. The moving electric push rod 8 is used to push the moving plate 7 and the sealing test mechanism towards the expansion valve. When several elastic plates 13 are all located outside the inlet pipe of the expansion valve, the sealing electric push rod 11 is used to push the sealing outer ring 17 towards the expansion valve. The sealing outer ring 17 squeezes several elastic plates 13, and then the sealing gasket 14 seals the connection between the elastic plates 13 and the inlet pipe of the expansion valve. The air pump 16 and the air pipe 15 are used to introduce gas of a certain pressure into the expansion valve. The circulating water pump 3 introduces test water into the immersion tank 1. When the connection between the elastic plate 13 and the expansion valve inlet pipe is below the liquid surface, stop water injection and observe whether air bubbles are generated at the outlet pipe of the expansion valve and at the connection between the elastic plate 13 and the expansion valve inlet pipe. If no air bubbles are generated at this time, drive the rotating rod 35 and the vibrating cam 36 to rotate through the vibration motor 34. Use the vibrating cam 36 to drive the product limiting mechanism and the expansion valve to vibrate, which can simulate the mechanical vibration of a vehicle in motion, thereby verifying the reliability of the valve under complex working conditions. During the vibration, observe whether air bubbles are generated at the outlet pipe of the expansion valve. If no air bubbles are generated, it means that the product is normal. Then use the lifting electric push rod 38 to push the lifting plate 39 and the temperature control tube 20 downward. The temperature control tube 20 can be moved to the outside of the temperature sensing bulb. Use the electric heating wire to heat the environment outside the temperature sensing bulb. When the temperature is heated to the set temperature required for the expansion valve to open, air bubbles are generated at the outlet pipe of the expansion valve, then the expansion valve product quality is normal.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automotive air conditioning valve testing apparatus, characterized by: include, The immersion mechanism includes an immersion tank (1), a water storage tank (2), a circulating water pump (3) installed on the water storage tank (2), a water supply pipe (4) installed at the output end of the circulating water pump (3), and a drain pipe (5) for connecting the immersion tank (1) and the water storage tank (2). The product limiting mechanism includes an L-shaped support frame (6), a limiting frame (22) disposed on the L-shaped support frame (6), a movable plate (7) disposed between the limiting frame (22) and the L-shaped support frame (6), an annular abutment piece (18) disposed on the rear side of the limiting frame (22), a support spring (21) disposed at the lower end of the annular abutment piece (18), a connecting frame (24) disposed on the rear side of the annular abutment piece (18) and fixedly connected to the L-shaped support frame (6), and a sealing test mechanism disposed between the movable plate (7) and the limiting frame (22). The vibration mechanism is located between the immersion tank (1) and the lower side wall of the L-shaped support frame (6).

2. The automotive air conditioning valve testing equipment according to claim 1, characterized in that: The product limiting mechanism includes a through hole (31) on the L-shaped support frame (6), a limiting slide bar (19) whose upper end is fixedly connected to the annular abutment piece (18), a baffle plate (2) whose lower end is fixedly connected to the limiting slide bar (19), and a limiting groove (23) on the limiting frame (22).

3. The automotive air conditioning valve testing equipment according to claim 1, characterized in that: The sealing test mechanism includes a connecting pipe (12) fixed to the rear side of the moving plate (7), a sealing outer ring (17) sleeved on the connecting pipe (12), a sealing electric push rod (11) fixed to the front side of the moving plate (7) and fixedly connected to the sealing outer ring (17), a plurality of elastic plates (13) fixed to the rear end of the connecting pipe (12), a sealing gasket (14) set inside the plurality of elastic plates (13), and an air pump (16) set in front of the immersion tank (1). The rear ends of several of the elastic plates (13) extend away from the sealing gasket (14).

4. The automotive air conditioning valve testing equipment according to claim 3, characterized in that: The output end of the air pump (16) is connected to an air pipe (15). The end of the air pipe (15) away from the air pump (16) passes through the moving plate (7) and is connected to the connecting pipe (12). The air pipe (15) is a flexible hose. Two baffles (10) are provided inside the immersion tank (1). A limiting slide rod (9) is fixedly connected to the front side of the baffle (10). The front end of the limiting slide rod (9) passes through the moving plate (7) and is fixedly connected to the front inner wall of the L-shaped support frame (6). The immersion tank (1) Auxiliary plates (28) are fixedly connected to the inner walls on both the left and right sides. A baffle three (29) is provided above the auxiliary plate (28). A limiting slide rod three (27) is fixedly connected to the lower end of the baffle three (29). The lower end of the limiting slide rod three (27) passes through the auxiliary plate (28) and is fixedly connected to the lower inner wall of the L-shaped support frame (6). An abutting spring (30) is sleeved on the limiting slide rod three (27). The upper and lower ends of the abutting spring (30) are fixedly connected to the adjacent side walls of the auxiliary plate (28) and the L-shaped support frame (6) respectively. The front end of the L-shaped support frame (6) is fixedly connected to a movable electric push rod (8), and the output end of the movable electric push rod (8) passes through the L-shaped support frame (6) and is fixedly connected to the front end of the movable plate (7).

5. The automotive air conditioning valve testing equipment according to claim 1, characterized in that: The vibration mechanism includes a partition plate (32) fixed to the bottom of the L-shaped support frame (6), a horizontal plate (33) set below the L-shaped support frame (6), a vibration motor (34) set on the front side of the immersion tank (1), and a vibration cam (36) set below the horizontal plate (33). There are two partition plates (32). The left and right ends of the horizontal plate (33) are fixed between the two partition plates (32). The front end of the vibration cam (36) is fixedly connected to a rotating rod (35). The end of the rotating rod (35) is fixedly connected to the output end of the vibration motor (34).

6. The automotive air conditioning valve testing equipment according to claim 1, characterized in that: The rear end of the immersion tank (1) is fixedly connected to an L-shaped external auxiliary frame (37). The upper end of the external auxiliary frame (37) is fixedly connected to a lifting electric push rod (38). The output end of the lifting electric push rod (38) passes through the upper side wall of the external auxiliary frame (37) and is fixedly connected to a lifting plate (39). The rear end of the lifting plate (39) abuts against the rear inner wall of the external auxiliary frame (37). The lower end of the lifting plate (39) is provided with a temperature control tube (20). The upper side wall of the connecting frame (24) is provided with a limiting hole (25). The inner side of the limiting hole (25) is provided with a limiting ring (26). The temperature control tube (20) is located directly above the limiting ring (26).

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