Process for filling low temperature heat pipe media

Abstract

The invention relates to a process for filling low temperature heat pipe media, which includes: 1. preparing of filling liquid quantity, 2. filling of ammonia liquid in a filling tank, 3. installation preparing of a heat pipe, 4. filling of media, 5. air exhausting of the heat pipe, 6. sealing of a liquid filling pipe, 7. sealing of an exhaust pipe and 8. welding of a protection cap. The process for filling the low temperature heat pipe media is simple, time-saving, labor-saving, high in filling work efficiency and easy and simple in method, reduces labor intensity, shortens processing time, and is safe, reliable and not apt to generate ammonia leakage. The process for filling the low temperature heat pipe media has the advantages that a new filling process is applied during low temperature heat pipe manufacture, the existing process method of using a vacuum pump for vacuumizing is fundamentally changed, and the feature of rapidly expanding in volume during evaporation of liquid ammonia is used for leading pressure in the pipe to be increased. The air is evacuated through pressure of gaseous ammonia, and the process is good in effect and reduces production cost.

Description

technical field [0001] The invention relates to a medium filling process for a low-temperature heat pipe. Background technique [0002] At present, the low-temperature heat pipe is a liquid-vapor two-phase flow heat transfer device. It is actually composed of a closed tube filled with working fluid. The upper part of the tube is welded with cooling blades, which is called radiator (also called condenser or condensation section); the lower part of the tube is buried in permafrost, called evaporator (also called evaporation section). In the cold season, when the air temperature is lower than the soil temperature, the temperature of the condensation section is lower than the temperature of the evaporation section, and the heat pipe starts. The liquid working medium in the evaporation section absorbs the latent heat of vaporization and evaporates into a gas. Under the action of pressure difference, the steam rises along the inner cavity of the tube to the condensation section...

AI Technical Summary

Problems solved by technology

Close the exhaust valve;