Filling gun suitable for liquid quantitative filling machine

Abstract

The utility model provides a filling gun suitable for a quantitative liquid filling machine, which comprises a filling gun shell, a filling joint is arranged at the bottom of the shell, a tee joint is arranged in the shell, a first interface of the tee joint is connected with the filling joint, a second interface of the tee joint is sequentially connected with a first electromagnetic valve and a vacuum connecting pipe, and the vacuum connecting pipe is connected with a second electromagnetic valve. Three connectors of the tee joint are sequentially connected with a second electromagnetic valve and a liquid connecting pipe, and a starting button and a stopping button are arranged on the filling gun shell. According to the filling gun suitable for the liquid quantitative filling machine, filling errors can be eliminated, waste of refrigerants is reduced, operation is convenient, and the filling efficiency of the refrigerants is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filling machine accessories, and particularly relates to a filling gun applicable to a liquid metering filling machine. Background Art

[0002] At present, the liquid metering filling machine, also known as the refrigerant filling machine, does not have a special filling head. It mainly uses a filling hose to connect the machine and the refrigeration equipment to be filled. The quantitatively filled refrigerant is filled into the refrigeration equipment through the hose. All control valves and control buttons are on the main body of the filling machine. This has the following disadvantages:

[0003] 1. When the refrigerant filling is completed and the hose is pulled out, the refrigerant in the hose will be discharged into the atmosphere. However, the quantitative filling of the refrigerant already includes the refrigerant in the hose part, which will cause the filling error of the refrigerant to become larger; moreover, the emptying of the refrigerant in the hose part will cause waste of the refrigerant.

[0004] 2. Since the refrigeration equipment is usually installed on the production line and is at a certain distance from the liquid metering filling machine, it is extremely inconvenient to control the start and stop of filling on the machine. Content of the Utility Model

[0005] In order to make up for the deficiencies in the prior art, the utility model provides a filling gun applicable to a liquid metering filling machine, which can eliminate filling errors, reduce waste of refrigerant, is convenient to operate, and effectively improves the refrigerant filling efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A filling gun applicable to a liquid metering filling machine includes a filling gun housing. A filling joint is provided at the bottom of the housing. A three-way joint is provided inside the housing. One interface of the three-way joint is connected to the filling joint. The second interface of the three-way joint is sequentially connected to a first electromagnetic valve and a vacuum connection pipe. The third interface of the three-way joint is sequentially connected to a second electromagnetic valve and a liquid connection pipe. A start button and a stop button are provided on the filling gun housing.

[0008] Further, the filling gun housing is composed of a base, an outer cover, and a handle. The three-way joint is provided on the base. A V-shaped fixing plate fixes the first electromagnetic valve and the second electromagnetic valve on the base. The outer cover is sleeved outside the base. The handle is connected to the outside of the top of the outer cover.

[0009] Further, the handle is of a hollow structure, and the vacuum connection pipe and the liquid connection pipe pass through the handle.

[0010] Further, the filling joint is a quick-connect female joint.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects:

[0012] 1. The filling gun applicable to the liquid metering filling machine of the present utility model integrates the main valve and the start / stop button of the filling machine into the filling gun. The refrigerant to be filled directly reaches the gun head and can enter the refrigeration equipment through the valve, which speeds up the filling speed, reduces the refrigerant remaining in the intermediate pipeline, and eliminates the filling error.

[0013] 2. Since there is no intermediate connecting pipeline, the waste of refrigerant can be reduced.

[0014] 3. The start / stop button is concentrated on the gun head. During operation, the operator does not need to go to the main body of the filling machine to press the button and can press the button at the refrigeration equipment, which improves the work efficiency and reduces the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded view of a filling gun applicable to the liquid metering filling machine of the present utility model.

[0016] Wherein: 1. Base; 2. Outer cover; 3. Handle; 4. Filling joint; 5. Tee; 6. V-shaped fixing plate; 7. First solenoid valve; 8. Second solenoid valve; 9. Vacuum connecting pipe; 10. Liquid connecting pipe; 11. Start button; 12. Stop button. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from this description, and those skilled in the art can make similar promotions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0018] Embodiment 1

[0019] As Figure 1 shown, a filling gun applicable to the liquid metering filling machine includes a filling gun housing, and the filling gun housing is composed of a base 1, an outer cover 2 and a handle 3. The base 1 is L-shaped, its bottom surface is connected with a filling joint 4, and its top surface is connected with a tee 5. The inner side wall of the base 1 is fixedly connected with a first solenoid valve 7 and a second solenoid valve 8 through a V-shaped fixing plate 6.

[0020] One interface of the tee 5 is connected with the filling joint 4, the second interface of the tee 5 is sequentially connected with the first solenoid valve 7 and the vacuum connecting pipe 9, and the third interface of the tee 5 is sequentially connected with the second solenoid valve 8 and the liquid connecting pipe 10. The outer cover 2 is sleeved outside the base 1, and the handle 3 is connected to the outside of the top of the outer cover 2.

[0021] The handle 3 has a hollow structure, and the vacuum connecting pipe 9 and the liquid connecting pipe 10 pass through the handle 3 and are respectively connected to the vacuum pump and the refrigerant interface of the filling machine. The top surface of the outer cover 2 is provided with a start button 11 and a stop button 12 for controlling the start and reset of the solenoid valve. Preferably, the filling connector 4 is a female quick connector.

[0022] The filling gun of the utility model is applicable to a liquid metering filling machine, and its usage method is as follows:

[0023] Connect the filling gun to the equipment to be filled with refrigerant through the filling connector 4, press the start button 11 to open the first solenoid valve 7 connected to the vacuum connecting pipe 9. At this time, the second solenoid valve 8 is in the closed state. The refrigeration equipment is supplemented and evacuated by the operation of the vacuum pump (the refrigeration equipment has been pre-evacuated on the refrigeration production line before filling). After reaching the preset vacuum degree, the filling machine automatically closes the first solenoid valve 7 (the control module is provided on the filling machine) and enters the pressure holding and leak detection stage. After detecting no leakage, the filling machine automatically opens the second solenoid valve 8 to fill the refrigeration equipment with liquid refrigerant. After the metering is reached, the filling machine automatically closes the second solenoid valve 8. At this time, press the stop button 12 to reset and wait for the next filling.

[0024] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A filling gun applicable to a liquid quantitative filling machine, characterized in that: It includes a filling gun housing. A filling connector is provided at the bottom of the housing. A three-way joint is provided inside the housing. One interface of the three-way joint is connected to the filling connector. The two interfaces of the three-way joint are sequentially connected to a first solenoid valve and a vacuum connection pipe. The three interfaces of the three-way joint are sequentially connected to a second solenoid valve and a liquid connection pipe. A start button and a stop button are provided on the filling gun housing.

2. The filling gun applicable to a liquid metering filling machine according to claim 1, characterized in that: The filling gun housing is composed of a base, an outer cover and a handle. The three-way joint is provided on the base. A V-shaped fixing plate fixes the first solenoid valve and the second solenoid valve on the base. The outer cover is sleeved outside the base. The handle is connected to the outside of the top of the outer cover.

3. The filling gun applicable to a liquid metering filling machine according to claim 2, wherein: The handle is of a hollow structure. The vacuum connection pipe and the liquid connection pipe pass through the handle.

4. The filling gun applicable to a liquid metering filling machine according to claim 3, characterized in that: The filling connector is a female quick connector.

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