Low-temperature heat pipe filling device and method with carbon dioxide as working medium

Through the method of liquefaction tank and vacuum system combined with dry ice sublimation, the simple and efficient filling of carbon dioxide heat pipes is achieved, and the problems of complex filling, high energy consumption and poor safety in the prior art are solved. It is suitable for a variety of heat pipe diameters.

CN120576326APending Publication Date: 2025-09-02NANJING TECH UNIV
2 Cites 0 Cited by

Patent Information

Application Number
CN202510857026.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-25
Publication Date
2025-09-02

AI Technical Summary

Technical Problem

The existing carbon dioxide heat pipe filling technology is complex, has high energy consumption and poor safety, making it difficult to achieve convenient and efficient quantitative filling, especially inconvenient operation under the diameter of small heat pipes.

Method used

A filling device consisting of a liquefaction tank, dry ice inlet, vacuum system and ball valve is used to generate carbon dioxide gas or liquid through dry ice sublimation, and the filling is simplified by gravity to simplify the operation process and reduce the use of cold trap devices.

Benefits of technology

It realizes safe, simple and high-precision filling of carbon dioxide heat pipes, adapts to different heat pipe diameters, reduces operating complexity and energy consumption, and is suitable for microchannels and micro heat pipes.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a low-temperature heat pipe filling device with carbon dioxide as a working medium and a method thereof.The filling device comprises a liquefying tank, the two sides of the top of the liquefying tank are provided with a dry ice input opening and a round pipe connector respectively, and the bottom of the liquefying tank is provided with a liquid filling pipe; the round pipe joint is respectively connected with a safety valve, a pressure gauge and a vacuum system through a ferrule type four-way pipe joint; the filling process comprises the steps of weighing and feeding dry ice, vacuumizing, sublimating and liquefying, filling and sealing. According to the invention, a cold trap device is not needed to reduce the saturated vapor pressure of carbon dioxide for liquefaction, the complexity of a filling device and an operation process is reduced, the operation is more convenient, and the energy consumption is also reduced; the filling amount of carbon dioxide can be accurately controlled; the filling device is suitable for various types of heat pipes, has no special requirement on the pipe diameter of the heat pipes, and can realize filling of micro-channel heat pipes and micro heat pipes.
Need to check novelty before this filing date? Find Prior Art