Single-station air tightness testing device for Freon filling tubes of automobile air conditioners
By designing a single-station airtightness detection device for Freon filling pipe of automobile air conditioners, the problem of lack of efficient airtightness detection device in the prior art is solved, automatic identification and notification of unqualified products are realized, and detection accuracy and operation convenience are improved.
Patent Information
- Application Number
- CN202421222250.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The prior art lacks a simple and efficient airtightness detection device for sealing detection of Freon filling pipes in automotive air conditioners.
A single-station airtightness detection device for a Freon filling tube of a car air conditioner is designed, including a base, installation box, console, plug connector, threaded connector assembly, alarm, motor, air pump, air supply pipe, battery and control module. The external threaded tube is driven by a motor to screw into the sealed connector, the air pump provides the compressed air, the air pressure sensor detects the air pressure, and the control module and the alarm are used to automatically identify and notify unqualified products.
It realizes automatic identification of unqualified products, reduces the labor intensity of workers, has high accuracy in the detection structure, is convenient to operate, and can effectively detect the airtightness of the Freon filling pipe of the automobile air conditioner.
Smart Images
Figure CN222748219U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipeline air tightness detection, and relates to a single-station air tightness detection device for a Freon filling pipe of an automobile air conditioner. Background Art
[0002] Freon filling tubes for automobile air conditioners are also called automobile fluorine filling tubes. The most common type on the market is a hose with a pressure gauge installed. One end of the hose has a sealing joint connected to the refrigerant tank, and the other end has a quick connector connected to the fluorine filling port. The sealing joint is a threaded connection, and the quick connector is plug-in clamped. In order to ensure the sealing of Freon filling tubes for automobile air conditioners, it is necessary to test the sealing before packaging and leaving the factory. Currently, there is a lack of a simple and efficient airtightness testing device. Utility Model Content
[0003] The utility model aims to solve the above problems in the prior art and proposes a single-station air tightness detection device for a Freon filling tube of an automobile air conditioner, which has a simple structure, strong practicability and convenient operation.
[0004] The purpose of the utility model can be achieved through the following technical solutions: a single-station air tightness detection device for a car air-conditioning freon filling tube, comprising a base, a mounting box and a control console fixed on the base, characterized in that plug connectors and threaded connector assemblies are respectively provided on the bases on both sides of the mounting box, an alarm is fixed on the side wall of the mounting box, a motor, an air pump, an air supply pipe, a battery and a control module are fixed in the mounting box, one end of the air supply pipe is connected to the outlet of the air pump, and the other end passes through the mounting box and is connected to the threaded connector assembly, an air pressure sensor is provided on the air supply pipe, the threaded connector assembly has a freely rotatable external threaded tube, and the external threaded tube is driven to rotate by a motor, the battery, motor, air pump and control module are connected by wires, the air pressure sensor, the alarm and the control module are connected by signal lines, and the console has a button connected to the control module and controlling the start and stop of the motor and the air pump.
[0005] Furthermore, the threaded joint assembly also includes a fixed platform, a follower gear, and a bearing. The fixed platform is fixed on the base, the follower gear is fixed on the outside of the external threaded tube and rotates synchronously with the external threaded tube, the fixed platform is provided with a side connecting hole and an upper connecting hole that are interconnected, the side connecting hole is connected to the air supply pipe, the bearing is fixed in the upper connecting hole, the bearing sleeve is outside the external threaded tube, the external threaded tube is inserted into the upper connecting hole, a driving gear is fixed on the output shaft of the motor, a clearance hole is provided on the side wall of the mounting box, and one side of the follower gear passes through the clearance hole to engage with the driving gear.
[0006] Furthermore, the air supply pipe passes through the clearance hole and is connected to the fixing platform.
[0007] Furthermore, the plug connector is a solid cylinder made of rubber.
[0008] Furthermore, the alarm is an audible and visual alarm or a buzzer alarm.
[0009] The worker plugs the quick connector of the Freon filling tube into the plug connector, puts the other end on the threaded joint assembly, presses the button on the console to start the motor, and the motor drives the driving gear, the follower gear and the external threaded tube to rotate together, so that the external threaded tube is screwed into the sealing joint to complete the threaded connection, and then turns off the motor. Press the button to start the air pump, and the air enters the interior of the inspected filling tube through the air supply pipe and the threaded joint assembly. The air pressure in the tube is detected by the air pressure sensor. When the air pressure in the tube reaches the preset value, turn off the air machine to stabilize the pressure in the tube for more than 10S, and obtain the final pressure value after the pressure is stabilized. If the difference between the final pressure value detected by the air pressure sensor and the preset value is less than 1Kpa, the air tightness of the filling tube is qualified. If the difference is less than 1Kpa, it is unqualified, the control module activates the alarm, and the worker separates the unqualified products.
[0010] Compared with the prior art, the single-station air tightness detection device for the automobile air-conditioning freon filling tube has the following advantages:
[0011] 1. It can automatically identify unqualified products and send out an alarm to notify workers. There is no need for workers to check the pressure gauge with their naked eyes. The detection structure has high accuracy and reduces the labor intensity of workers.
[0012] 2. It has a simple structure, strong practicality, built-in battery, can be moved at will, has low technical requirements for operators, is easy to operate, and can be learned quickly.
[0013] 3. The threaded connection of the sealing joint is achieved through the motor, which has good sealing effect and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a three-dimensional structural schematic diagram of a single-station air tightness detection device for a Freon filling tube of an automobile air conditioner.
[0015] Figure 2 The utility model is a side view of a single-station air tightness detection device for a Freon filling tube of an automobile air conditioner.
[0016] Figure 3 is a cross-sectional view of a threaded connector assembly.
[0017] In the figure, 1. base; 2. installation box; 3. control console; 4. plug connector; 5. threaded connector assembly; 51. external threaded pipe; 52. fixing table; 53. follower gear; 54. bearing; 55. side connection hole; 56. upper connection hole; 57. driving gear; 58. clearance hole; 6. alarm; 7. motor; 8. air pump; 9. air supply pipe; 10. battery; 11. control module; 12. air pressure sensor; 13. button. DETAILED DESCRIPTION
[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0019] like Figure 1 , Figure 2 As shown, the single-station air tightness detection device for the automobile air-conditioning freon filling tube comprises a base 1, on which a mounting box 2 and a control console 3 are fixed, plug connectors 4 and threaded connector assemblies 5 are respectively provided on the base 1 on both sides of the mounting box 2, an alarm 6 is fixed on the side wall of the mounting box 2, a motor 7, an air pump 8, an air supply pipe 9, a battery 10 and a control module 11 are fixed in the mounting box 2, one end of the air supply pipe 9 is connected to the outlet of the air pump 8, and the other end passes through the mounting box 2 and is connected to the threaded connector assembly 5, an air pressure sensor 12 is provided on the air supply pipe 9, the threaded connector assembly 5 has a freely rotatable external threaded pipe 51, and the external threaded pipe 51 is driven to rotate by the motor 7, the battery 10, the motor 7, the air pump 8 and the control module 11 are connected through wires, the air pressure sensor 12, the alarm 6 and the control module 11 are connected through signal lines, and the control console 3 has a button 13 connected to the control module 11 and controlling the start and stop of the motor 7 and the air pump 8.
[0020] like Figure 3 As shown, the threaded joint assembly 5 also includes a fixed platform 52, a follower gear 53, and a bearing 54. The fixed platform 52 is fixed on the base 1, and the follower gear 53 is fixed on the outside of the external threaded tube 51 and rotates synchronously with the external threaded tube 51. The fixed platform 52 is provided with a side connecting hole 55 and an upper connecting hole 56 that are interconnected. The side connecting hole 55 is connected to the air supply pipe 9, and the bearing 54 is fixed in the upper connecting hole 56. The bearing 54 is sleeved on the outside of the external threaded tube 51, and the external threaded tube 51 penetrates into the upper connecting hole 56. A driving gear 57 is fixed on the output shaft of the motor 7, and a clearance hole 58 is provided on the side wall of the mounting box 2. One side of the follower gear 53 passes through the clearance hole 58 and meshes with the driving gear 57.
[0021] The air supply pipe 9 passes through the clearance hole 58 and is connected to the fixing platform 52. The plug connector 4 is a solid cylinder made of rubber.
[0022] The alarm 6 is an audible and visual alarm, and the control module 11 controls the alarm 6 to send out a warning signal to quickly and clearly remind the worker that the product being tested is a defective product.
[0023] Working principle: The worker plugs the quick interface of the Freon filling tube into the plug connector 4, and puts the other end on the threaded joint assembly 5. Press the button 13 of the console 3 to start the motor 7. The motor 7 drives the driving gear 57, the follower gear 53 and the external threaded tube 51 to rotate together, so that the external threaded tube 51 is screwed into the sealing joint to complete the threaded connection, and the motor 7 is turned off. Press the button 13 to start the air pump 8, and the air enters the interior of the inspected filling tube through the air supply pipe 9 and the threaded joint assembly 5. The air pressure in the tube is detected by the air pressure sensor 12. When the air pressure in the tube reaches the preset value, the air machine is turned off to stabilize the pressure in the tube for more than 10S. After the pressure is stabilized, the final pressure value is obtained. If the difference between the final pressure value detected by the air pressure sensor 12 and the preset value is less than 1Kpa, the air tightness of the filling tube is qualified. If the difference is less than 1Kpa, it is unqualified, and the control module 11 starts the alarm 6, and the worker separates the unqualified products.
[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A single-station air tightness detection device for a freon filling tube of an automobile air conditioner, comprising a base (1), on which a mounting box (2) and a control console (3) are fixed, characterized in that: A plug connector (4) and a threaded connector assembly (5) are respectively provided on the base (1) on both sides of the installation box (2); an alarm (6) is fixed on the side wall of the installation box (2); a motor (7), an air pump (8), an air supply pipe (9), a battery (10) and a control module (11) are fixed in the installation box (2); one end of the air supply pipe (9) is connected to the outlet of the air pump (8), and the other end passes through the installation box (2) and is connected to the threaded connector assembly (5); an air pressure sensor (11) is provided on the air supply pipe (9) 12), the threaded joint assembly (5) has a freely rotatable external threaded tube (51), the external threaded tube (51) is driven to rotate by a motor (7), the storage battery (10), the motor (7), the air pump (8) and the control module (11) are connected by wires, the air pressure sensor (12), the alarm (6) and the control module (11) are connected by signal lines, and the control console (3) has a button (13) connected to the control module (11) and controlling the start and stop of the motor (7) and the air pump (8).
2. A single-station air tightness detection device for automobile air-conditioning freon filling tube according to claim 1, characterized in that: The threaded joint assembly (5) further comprises a fixing platform (52), a follower gear (53), and a bearing (54). The fixing platform (52) is fixed on the base (1). The follower gear (53) is fixed on the outside of the externally threaded tube (51) and rotates synchronously with the externally threaded tube (51). The fixing platform (52) is provided with a side connection hole (55) and an upper connection hole (56) which are interconnected. The side connection hole (55) is connected to the air supply pipe (9). The bearing (54) is fixed in the upper connection hole (56). The bearing (54) is sleeved on the outside of the externally threaded tube (51). The externally threaded tube (51) is inserted into the upper connection hole (56). A driving gear (57) is fixed on the output shaft of the motor (7). A clearance hole (58) is provided on the side wall of the mounting box (2). One side of the follower gear (53) passes through the clearance hole (58) and meshes with the driving gear (57).
3. A single-station air tightness detection device for automobile air-conditioning Freon filling tube according to claim 2, characterized in that: The air supply pipe (9) passes through the clearance hole (58) and is connected to the fixing platform (52).
4. A single-station air tightness detection device for automobile air-conditioning Freon filling tube according to claim 3, characterized in that: The plug connector (4) is a solid cylinder made of rubber material.
5. A single-station air tightness detection device for automobile air-conditioning Freon filling tube according to claim 4, characterized in that: The alarm (6) is an audible and visual alarm or a buzzer alarm.