Copper and aluminium composite variable diameter metal heat pipe

Abstract

A copper and aluminium composite variable diameter metal heat pipe structurally comprises a heat absorption section, a butt joint section and a condensation section. A pipe shell of the metal heat pipe is composed of a copper and aluminium composite metal pipe. The copper and aluminium composite metal pipe is of an outside aluminium and inside copper structure. The heat suction section is composed of an opening sealing welding spot (1), a cold welding opening sealing section (2), a heat suction section outer layer (3), a heat suction section inner layer (4), a heat suction section flaring part (6) and the like. The butt joint section is composed of butt joint pipes (7), the butt joint pipes (7) are made of red copper or oxygen-free copper pipes, the inner diameter of the butt joint pipes is equal to the inner diameter of the heat suction section inner layer (4), and the outer diameter of the butt joint pipes is equal to the inner diameter of the heat suction section flaring part (6). The condensation section is composed of a necking-down section (8), a condensation section body (9) and the like. The size specification of the necking-down section (8) is basically the same as that of the heat suction section flaring opening (6). A cavity of the heat suction section, a cavity of the butt joint section and a cavity of the condensation section are connected to together form a heat pipe vacuum cavity (5), heat pipe phase inversion hot working media (10) are arranged in the heat pipe vacuum cavity (5), and the total size of the heat pipe phase inversion hot working media (10) is 0.1%-20% of the size of the heat pipe vacuum cavity (5). According to the copper and aluminium composite variable diameter metal heat pipe, under the condition that the strength and the reliability needed by the metal heat pipe are guaranteed, the manufacturing cost of the metal heat pipe is lowered.

Description

technical field [0001] The invention relates to a metal heat pipe, in particular to a metal variable-diameter heat pipe using a copper-aluminum composite pipe with an outer aluminum inner copper structure as a metal pipe shell and a processing method thereof, belonging to the field of solar heat utilization. Background technique [0002] Heat pipe technology was developed after a heat transfer element called "heat pipe" was invented by G.M.Grove of Los Alamos National Laboratory in the United States in 1963. The heat of the heating object is quickly transferred to the outside of the heat source through the heat pipe, and its thermal conductivity exceeds that of any known metal. Solar thermal utilization technology has been developed for more than 20 years, and both technology and market have developed rapidly. As the core technology of solar heat utilization, the heat collecting tube technology is also in continuous development. It has developed from the early double-layer ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to use red copper or oxygen-free copper as the material of the metal shell, but solve the related problems of welding of metal heat pipes, compatibility of working fluid, degree of vacuum, etc.

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