Filling device for vacuum system and filling method of enclosed cavity

Abstract

A filling device for a vacuum system and a filling method for a closed cavity, including a screw with a filling channel, a cover with a suction filling port, and a fastening screw for rotating the screw provided on the cover One end opening of the filling channel in the screw is set on the bottom of the screw, the other end opening is set on the side of the screw, and a cavity with an internal thread matching the screw is provided on the cavity that needs to be vacuumed. The screw is sealed and installed on the interface, and the cover is sealed and installed on the outside of the interface, so that a sealed space is formed in the cover, and the fastener on the cover is tightly connected with the cover and the fastener can The cover body rotates while moving up and down, the fasteners correspond to the positions of the screws, and the screws are screwed out or screwed into the interface through the fasteners. The invention is a filling device for a vacuum system with simple structure and convenient operation, simple processing and operation, and effectively solves the problems of filling and sealing.

Description

technical field [0001] The invention relates to a filling device for a vacuum system and a filling method for a closed cavity. Background technique [0002] Heat pipes that utilize the vapor-liquid phase transition characteristics of working fluids for heat transfer are high-performance heat transfer elements that can be widely used in various fields of national production, such as heat dissipation of power electronic equipment, waste heat recovery, etc. However, in the production process of the heat pipe, it needs to be vacuumized and sealed after filling the working fluid. The existing heat pipe filling methods include the liquid injection vacuum method and the vacuum liquid injection method. Because the liquid injection vacuum method is very It is difficult to remove the non-condensable gas, and it is difficult to control the amount of working fluid in the heat pipe, so it is difficult to ensure the working performance of the heat pipe. The vacuum pumping liquid injectio...

AI Technical Summary

Problems solved by technology

However, in the production process of the heat pipe, it needs to be vacuumized and sealed after filling the working fluid. The existing heat pipe filling methods include the liquid injection vacuum method and the vacuum injection liquid injection method. It is difficult to remove the non-condensable gas, and it is difficult to control the amount of working fluid in the heat pipe, so it is difficult to ensure the working performance of the heat pipe

The vacuum injection method can well overcome the above technical defects, but the sealing interface and its filling method have disadvantages such as complicated operation and short sealing life.

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