SU1747845A1 - Heat tube - Google Patents

Abstract

SUMMARY OF THE INVENTION: A cylindrical insert 4 with longitudinal slots 5 is coaxially mounted in the heat pipe body 1 in the condensation zone. In the insert cavity, the piston 6 is displaceable. 2 Il.

Description

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The invention relates to heat engineering and electronics and can be used in temperature stabilization systems.

A gravitational heat pipe is known, consisting of a hermetic enclosure filled with working fluid and saturated steam.

The disadvantage of such a heat pipe in-. The absence of thermal stabilization in its evaporation region.

The gravitational heat pipe is closest to the technical essence. which ensures a change in the heat-transfer surface area in the condensation section.

The disadvantage of such a heat pipe is the need to accurately maintain the gap between the piston and the housing of 0.1 mm along the entire length of the condensation section, which requires high precision treatment of the surfaces of the piston and heat pipe housing and, as a consequence, reduces its reliability and manufacturability.

The purpose of the invention is to increase reliability and manufacturability, x

The goal is achieved by the fact that in a heat pipe containing a vertical case, in the cavity of which a piston is mounted in the condensation zone, and protrusions are made on the lower boundary of this zone, in the condensation zone a cylindrical insert with longitudinal slits, at the base of which there is a hole with a diameter smaller than the diameter of the piston, the latter being located in the cavity of this insert, and at the point of contact with the protrusions, the insert is provided with bu teak.

FIG. 1 shows a heat pipe, section; in fig. 2 is a section A-A in FIG. one.

The heat pipe consists of a hermetic case 1 filled in the evaporation zone with working fluid 2, in the condensation zone-steam 3, a coaxially mounted cylindrical insert 4 with longitudinal slots 5 and a movable piston 6 placed in the insert cavity with a gap of 0.2- 5 mm. The protrusions 7 are made on the inner wall of the housing in the lower part of the condensation zone. The insert, in contact with the projections of the housing, is provided with a collar.

8, and at its base there is an opening 9, with a diameter smaller than the diameter of the piston.

The temperature of the evaporator section of the heat pipe is stabilized as follows.

When the power supplied to the evaporator section of the heat pipe changes, the piston 6 under the pressure of steam 3 moves along the axis of the insert 4, thereby changing the overlap of the living section of the slots 5, which

Determines the flow rate of steam from the evaporating section to the condensation section depending on the magnitude of the input power while maintaining a practically constant saturation vapor pressure in the evaporation section.

and, accordingly, the temperature of the working fluid 2, thereby ensuring that the temperature of the evaporator portion of the heat pipe is stabilized. accuracy of ± 3 ° C.

The invention allows to increase the reliability and manufacturability of the heat pipe.

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Claims (1)

Invention Formula A heat pipe containing a vertical body, in the Cavity of which, in the condensation zone, a piston is mounted for movement, and protrusions are made on the lower boundary of the indicated zone on the inner wall of the body, which, in order to improve reliability and workability, The cylindrical insert with longitudinal slits, in the base of which a hole is made with a diameter smaller than the diameter of the piston, is coaxially mounted, the latter being located in the cavity of this insert and in m ste contact with the projections is provided with a collar insert. Aa fig z