A refrigerant filling machine filling gun

Abstract

The invention provides a filling gun for a refrigerant filling machine, which includes a vacuum pumping pipeline, a refrigerant recovery pipeline, a refrigerant filling control pipeline, and a refrigerant output pipeline. The vacuum pipeline is connected to the refrigerant output pipeline through a direct-acting solenoid valve, and the refrigerant filling control pipeline is connected to the refrigerant output pipeline through a direct-acting solenoid valve. The present invention adopts the electromagnetic valve to replace the pneumatic valve, the sealing parts of the electromagnetic valve are greatly reduced compared with the pneumatic valve, the closing force generated by the electromagnetic valve is relatively large, the action and sealing can be reliable, and the accuracy of filling can be improved while the reliability is high. Solenoid valves are integrated on two valve blocks, which reduces integration difficulty and facilitates maintenance.

Description

technical field [0001] The invention relates to a filling device, in particular to a filling gun of a refrigerant filling machine. Background technique [0002] The refrigerant filling machine is the key imported equipment, and the filling gun in the equipment is a custom-made part, which is used to vacuum fill the refrigerant of the automobile air conditioner. The structure of the traditional refrigerant filling gun is mainly composed of three built-in air control valves, control air circuit and end face seal. The built-in valve is an imported component. Because the pneumatic control needs to use a lot of sealing rings, the material and dimensional accuracy of the sealing parts are very high. After a long time, it is easy to wear and block, resulting in small leakage of filling and other faults. Gas blow-by will also affect the vacuum performance of the equipment. . After many years of operation, the filling gun has suffered serious wear and aging, and the sealing perform...

AI Technical Summary

Problems solved by technology

The built-in valve is an imported component. Because the pneumatic control needs to use a lot of sealing rings, the material and dimensional accuracy of the sealing parts are very high. After a long time, it is easy to wear and block, resulting in small leakage of filling and other faults. Gas blow-by will also affect the vacuum performance of the equipment.

After many years of operation, the filling gun is seriously worn and aged, and the sealing performance is reduced, resulting in frequent failures

The filling gun is small in size and integrates a large number of components, which makes the processing accuracy of the whole filling gun very high. The integration of a large number of components on a valve block also increases the difficulty of integration and maintenance. It is difficult for domestic suppliers to achieve the same manufacturing level

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