SU1455216A1 - Heat tube - Google Patents

Abstract

The invention relates to heat engineering and allows controlling the temperature of the evaporation zone for pipes with a capillary structure in the form of longitudinal grooves. The tube comprises a housing 1 of a material with a shape memory and longitudinal capillary grooves 4 on its inner surface. The end wall of the evaporation zone 2 is connected to the side wall by means of a flexible insert 6 made in the form of a corrugated bellows with the formation of a capillary annular channel 7. When the pipe operates, the heat load changes (according to the temperature of the martensitic transformation of the body material) and the dimensions of the grooves 4, which ensures the regulation of the thermal resistance of the heat pipe, while the insert 6 plays the role of a damper. I з, п.ф-л, 2 Il.

Description

BUT

-

cl

ate to

Od

Fig, 1

FIELD OF THE INVENTION The invention relates to heat engineering, namely to heat transfer devices.

The purpose of the invention is to control the temperature of the evaporation zone to tubes with a capillary structure in the form of longitudinal grooves,

1 FIG. 1 shows a heat pipe; ba, general view; FIG. 2 is a section IA-A of FIG. one.

; The heat pipe contains a hermetic case 1 made of a material with a memory for fori and having zones

2 and 3 evaporation and condensation, respectively, and a capillary structure in the form of longitudinal grooves 4 on its inner surface. The end wall 5 of the housing 1 in the evaporation zone 2 is connected to its side wall by means of a flexible insert 6 made in the form of a bellows corrugation with the formation of a capillary annular channel 7 communicated with the end of the capillary structure. The high-temperature and low-temperature forms of the housing 1 are characterized by a larger and smaller diameter, respectively.

Heat pipe works as follows.

When heat is supplied and removed to zone 2 and 3 of evaporation and condensation, respectively, heat and mass transfer is carried out through the pipe with a change in the aggregate state of the coolant. As the heat load increases, the temperature of the evaporation zone 2 increases and the material of the housing 1 undergoes martensitic transformation and diameter the hull increases, as this increases, the size of the capillary

There are notable grooves 4, which helps to reduce their hydraulic resistance and, therefore, thermal resistance of the heat pipe and stabilize the temperature of the evaporation zone 2. When the heat load decreases, the diameter of the housing 1 decreases and the thermal resistance of the pipe slightly increases, i.e. The heat pipe works as a kind of automatic two-position temperature regulator. The capillary annular channel 7 ensures the redistribution of the heat transfer medium along the grooves 4 in the event of violations of their uniform feed.

Claims (2)

Invention Formula 1, A heat pipe containing a sealed enclosure in evaporation and condensation zones, made of a material with shape memory, and a capillary structure on the inner surface of the enclosure, characterized in that, in order to control the temperature of the evaporation zone for capillary structure pipes in the form of longitudinal grooves, end and side walls of the body in the evaporation zone are connected by means of a flexible insert and the high-temperature and low-temperature forms of the pipe body are made respectively with larger and smaller diameters , 2. Pipe pop, 1, characterized in that the flexible insert is made in the form of a bellows corrugation with the formation of a capillary annular channel communicated with the end of the capillary structure, jig