A refrigerant filling gun

Abstract

The utility model provides a kind of refrigerant filling gun, including filling gun body, the bottom of filling gun body is connected with lower injection pipeline, and lower injection pipeline is located in filling gun body and is provided with resistance type sealing assembly, filling gun body is integrally connected with flow control assembly, another end of flow control assembly is communicated with filling delivery pipeline, and the tail end of filling delivery pipeline is provided with sealing connection assembly with external filling pipe detachable connection.The utility model has the beneficial effects as follows, the utility model is simple in structure, convenient to use, can effectively play the effect of sealing when with the injection port of equipment butt joint, thereby avoiding the problem of leakage, and the injection flow size can be adjusted, to avoid overflow due to too fast flow rate, and convenient for installation and dismounting work with external filling pipe, convenient for replacement.

Description

Technical Field

[0001] This utility model is a refrigerant filling gun, belonging to the field of refrigerant filling technology. Background Technology

[0002] The refrigerant charging gun is a core tool in automotive air conditioning repair and maintenance. It is used to quickly and safely connect the refrigerant tank, pressure gauge set or recovery equipment to the automotive air conditioning system. Currently, refrigeration production lines use refrigerant charging machines to add refrigerant to refrigeration equipment such as air conditioners and refrigerators. The refrigerant charging machine is usually equipped with components such as a supply bottle, vacuum booster pump, and balance cylinder, which are connected to the charging pipes located outside the cabinet. Then, the charging gun head at the end of the charging pipes adds refrigerant to the equipment.

[0003] Existing refrigerant charging guns lack a proper seal between the charging hose and the charging equipment connection, leading to potential leaks during refrigerant charging. Furthermore, the existing charging guns are inconvenient for flow rate adjustment and for easy installation and removal from external charging hoses. They also hinder disassembly and repair when damaged. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a refrigerant filling gun.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A refrigerant refueling gun includes a refueling gun body, a refueling pipe connected to the bottom of the refueling gun body, and a contact-type sealing component provided in the refueling pipe on the refueling gun body. A flow control component is integrally connected to the refueling gun body, and the other end of the flow control component is connected to a refueling delivery pipe. The tail end of the refueling delivery pipe is provided with a sealing connection component that is detachably connected to an external refueling pipe.

[0007] Furthermore, the contact sealing assembly includes a fixed connecting sleeve, one end of which is connected to the lower injection pipe via a threaded connection, and the bottom end of the fixed connecting sleeve is integrally connected to a lower connecting pipe, the outer wall of which is fitted with an adjustable contact outer ring.

[0008] Furthermore, a lower hollow docking seat is integrally connected to the bottom end of the lower connecting pipe. The lower hollow docking seat is connected to the lower connecting pipe, and the lower injection pipe is fixed and connected to the lower hollow docking seat. Several rubber sealing rings are sleeved on the outer wall of the lower hollow docking seat. The top of the rubber sealing ring is connected to an adjustable abutment outer ring. A displacement groove is provided on the outside of the adjustable abutment outer ring. A positioning post penetrating the displacement groove is provided on the outer wall of the lower connecting pipe. A limiting nut is provided on the outer sleeve of the positioning post.

[0009] Furthermore, the flow control component includes a connecting pipe installed between the filling gun body and the filling delivery pipeline. The connecting pipe is sealed to the filling gun body and the filling delivery pipeline by mounting bolts, and a support seat is integrally installed on the connecting pipe.

[0010] Furthermore, a valve stem is rotatably installed inside the connecting pipe, and a sealing valve plate matching the connecting pipe is installed on the valve stem. A rotating shaft is integrally connected to the top of the valve stem, and the rotating shaft is rotatably installed on the support base.

[0011] Furthermore, the sealing connection assembly includes an outer connecting pipe sleeve integrally connected to the filling and conveying pipeline, and a sealing ring is provided at the connection between the outer connecting pipe sleeve and the filling and conveying pipeline. An inner limiting pipe sleeve is fixedly connected inside the outer connecting pipe sleeve, and a mating cavity for inserting an external filling pipe is formed between the inner limiting pipe sleeve and the outer connecting pipe sleeve. Both the outer wall of the inner limiting pipe sleeve and the inner wall of the outer connecting pipe sleeve are provided with elastic washers, and four sets of threaded positioning knobs are provided on the outer connecting pipe sleeve.

[0012] The beneficial effects of this utility model are:

[0013] By connecting a lower injection pipe to the bottom of the injection gun body and sleeved with a valve core at the injection port, refrigerant injection is achieved. The contact-type sealing component effectively seals the lower injection pipe when it connects to the equipment's injection port, preventing leakage. A flow control component adjusts the injection flow rate. A sealing connection component at the end of the injection delivery pipe facilitates connection and disassembly with an external injection pipe. This invention features a simple structure, ease of use, and effective sealing when connected to the equipment's injection port, preventing leakage. It also allows for flow rate adjustment to prevent overflow due to excessive flow and facilitates installation, disassembly, and replacement of external injection pipes. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a refrigerant filling gun according to the present invention;

[0016] Figure 2 This is a schematic diagram of the contact-type sealing assembly in a refrigerant filling gun according to the present invention;

[0017] Figure 3This is a schematic diagram of the flow control component in a refrigerant filling gun according to the present invention;

[0018] Figure 4 This is a schematic diagram of the sealing connection component in a refrigerant filling gun according to the present invention.

[0019] In the diagram, 1. Injection gun body; 2. Injection pipe; 3. Contact sealing assembly; 4. Flow control assembly; 5. Injection delivery pipe; 6. Sealing connection assembly; 7. Fixed connecting sleeve; 8. Lower connecting pipe; 9. Adjustable contact outer ring; 10. Rubber sealing ring; 11. Displacement groove; 12. Positioning pin; 13. Support seat; 14. Connecting pipe; 15. Sealing valve plate; 16. Valve stem; 17. Rotating shaft; 18. Mounting bolt; 19. Outer connecting pipe sleeve; 20. Sealing ring; 21. Inner limit sleeve; 22. Connecting cavity; 23. Elastic washer; 24. Threaded positioning knob; 25. Lower hollow connecting seat. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a refrigerant charging gun technical solution, including a charging gun body 1. The bottom of the charging gun body 1 is connected to a lower charging pipe 2. By connecting the lower charging pipe 2 to the bottom of the charging gun body 1 and sleeved with a valve core at the charging port, refrigerant charging is achieved. A contact-type sealing component 3 is provided on the charging gun body 1 in the lower charging pipe 2. A flow control component 4 is integrally connected to the charging gun body 1. Through the action of the contact-type sealing component 3, the lower charging pipe 2 can effectively seal when it is connected to the charging port of the equipment, thereby preventing leakage. The flow control component 4 can adjust the charging flow rate. The other end of the flow control component 4 is connected to a charging conveying pipe 5. The tail end of the charging conveying pipe 5 is provided with a sealing connection component 6 that is detachably connected to an external charging pipe. The sealing connection component 6 at the end of the charging conveying pipe 5 facilitates the connection and disassembly of the pipe to the external charging pipe.

[0022] See Figure 2The contact sealing assembly 3 includes a fixed connecting sleeve 7. One end of the fixed connecting sleeve 7 is connected to the lower injection pipe 2 by a threaded connection. The bottom end of the fixed connecting sleeve 7 is integrally connected to the lower connecting pipe 8. An adjustable contact outer ring 9 is fitted on the outer wall of the lower connecting pipe 8. A lower hollow docking seat 25 is integrally connected to the bottom end of the lower connecting pipe 8. The lower hollow docking seat 25 is connected to the lower connecting pipe 8, and the lower injection pipe 2 is fixed and connected to the lower hollow docking seat 25. Several rubber sealing rings 10 are fitted on the outer wall of the lower hollow docking seat 25. The top of the rubber sealing rings 10 is connected to the adjustable contact outer ring 9, and the adjustable contact outer ring 9 is provided with a displacement groove 11. The outer wall of the lower connecting pipe 8 is provided with a positioning post 12 that penetrates the displacement groove 11. A limiting nut is fitted on the outer wall of the positioning post 12. By inserting the lower hollow docking seat 25 into the equipment's inlet, the adjustable abutment outer ring 9 is pushed by several turns of rubber sealing ring 10. The rubber sealing ring 10 is deformed by the extrusion pressure, filling the middle of the equipment's inlet and the hollow docking seat 25 to achieve a sealing effect. By adjusting the limit nut, the position of the adjustable abutment outer ring 9 can be finely adjusted, so that it can be inserted deeper into the equipment's inlet.

[0023] See Figure 3 The flow control assembly 4 includes a connecting pipe 14 installed between the filling gun body 1 and the filling delivery pipe 5. The connecting pipe 14 is sealed to the filling gun body 1 and the filling delivery pipe 5 by mounting bolts 18. A support base 13 is integrally installed on the connecting pipe 14. A valve stem 16 is rotatably installed inside the connecting pipe 14, and a sealing valve plate 15 matching the connecting pipe 14 is installed on the valve stem 16. A rotating shaft 17 is integrally connected to the top of the valve stem 16, and the rotating shaft 17 is rotatably installed on the support base 13. By rotating the rotating shaft 17, the valve stem 16 is driven to rotate, thereby causing the sealing valve plate 15 to rotate, thus adjusting the flow rate in the connecting pipe 14.

[0024] See Figure 4 The sealing connection assembly 6 includes an outer connecting sleeve 19 integrally connected to the filling and conveying pipeline 5. A sealing ring 20 is provided at the connection between the outer connecting sleeve 19 and the filling and conveying pipeline 5. An inner limiting sleeve 21 is fixedly connected inside the outer connecting sleeve 19. A docking cavity 22 for inserting the external filling pipe is formed between the inner limiting sleeve 21 and the outer connecting sleeve 19. Elastic washers 23 are provided on the outer wall of the inner limiting sleeve 21 and the inner wall of the outer connecting sleeve 19. Four sets of threaded positioning knobs 24 are provided on the outer connecting sleeve 19. By inserting one end of the external filling pipe into the docking cavity 22 and sealing it with the elastic washers 23 provided on the outer wall of the inner limiting sleeve 21 and the inner wall of the outer connecting sleeve 19, it can be tightened by the threaded positioning knobs 24. The whole assembly is easy to disassemble.

[0025] In use, refrigerant is injected by connecting a lower injection pipe 2 to the bottom of the injection gun body 1 and sleeved with a valve core at the injection port. The contact sealing component 3 effectively seals the lower injection pipe 2 when it connects to the equipment's injection port, preventing leakage. The flow control component 4 adjusts the injection flow rate. A sealing connection component 6 at the end of the injection delivery pipe 5 facilitates connection and disassembly with an external injection pipe. This invention has a simple structure, is easy to use, effectively seals the injection port to prevent leakage, adjusts the injection flow rate to prevent overflow due to excessive flow, and facilitates installation, disassembly, and replacement of external injection pipes.

[0026] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A refrigerant filling gun, characterized in that, The device includes a filling gun body (1), a filling pipe (2) connected to the bottom of the filling gun body (1), and a contact sealing component (3) provided on the filling gun body (1) in the filling pipe (2). A flow control component (4) is integrally connected to the filling gun body (1), and the other end of the flow control component (4) is connected to a filling delivery pipe (5). A sealing connection component (6) is provided at the tail end of the filling delivery pipe (5) and is detachably connected to an external filling pipe.

2. A refrigerant filling gun according to claim 1, characterized in that, The contact sealing assembly (3) includes a fixed connecting sleeve (7), one end of which is connected to the lower injection pipe (2) by a threaded connection, and the bottom end of the fixed connecting sleeve (7) is integrally connected to the lower connecting pipe (8), and the outer wall of the lower connecting pipe (8) is fitted with an adjustable contact outer ring (9).

3. A refrigerant filling gun according to claim 2, characterized in that, The bottom end of the lower connecting pipe (8) is integrally connected to the lower hollow docking seat (25). The lower hollow docking seat (25) is connected to the lower connecting pipe (8), and the lower injection pipe (2) is fixed and connected to the lower hollow docking seat (25). The outer wall of the lower hollow docking seat (25) is fitted with several rubber sealing rings (10). The top of the rubber sealing ring (10) is connected to the adjustable abutting outer ring (9). The adjustable abutting outer ring (9) is provided with a displacement groove (11). The outer wall of the lower connecting pipe (8) is provided with a positioning post (12) that penetrates the displacement groove (11). The positioning post (12) is fitted with a limiting nut.

4. A refrigerant filling gun according to claim 3, characterized in that, The flow control assembly (4) includes a docking connecting pipe (14) installed between the filling gun body (1) and the filling delivery pipe (5). The docking connecting pipe (14) is sealed to the filling gun body (1) and the filling delivery pipe (5) by mounting bolts (18). A support base (13) is integrally installed on the docking connecting pipe (14).

5. A refrigerant filling gun according to claim 4, characterized in that, A valve stem (16) is rotatably installed inside the connecting pipe (14), and a sealing valve plate (15) matching the connecting pipe (14) is installed on the valve stem (16). A rotating shaft (17) is integrally connected to the top of the valve stem (16), and the rotating shaft (17) is rotatably installed on the support seat (13).

6. A refrigerant filling gun according to claim 5, characterized in that, The sealing connection assembly (6) includes an outer connecting sleeve (19) integrally connected to the filling and conveying pipeline (5), and a sealing ring (20) is provided at the connection between the outer connecting sleeve (19) and the filling and conveying pipeline (5). An inner limiting sleeve (21) is fixedly connected inside the outer connecting sleeve (19). A mating cavity (22) for inserting an external filling pipe is formed between the inner limiting sleeve (21) and the outer connecting sleeve (19). An elastic washer (23) is provided on the outer wall of the inner limiting sleeve (21) and the inner wall of the outer connecting sleeve (19). Four sets of threaded positioning knobs (24) are provided on the outer connecting sleeve (19).

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