SU1270528A1 - Heat pipe - Google Patents

Abstract

A HEAT PIPE, containing a vertical casing, in the transport and condensation zones of which is installed: a flap insert, perforated in the condensation zone and forming an annular gap in this zone with the casing, and a drip-trap, located under the insert, characterized in that, in order to increase the heat transfer capacity , on the inside surface. cases) in the zones of transport and condensation, longitudinal grooves are made, forming closed channels with an insert in the transport zone, while in the area of condensation in the wall of the case an additional thread is made, and the insert perforation is located along a helical line opposite the tops of the thread. (L about O1 th CX)

Description

one

The invention relates to heat engineering and can be used in heat pipes.

j The purpose of the invention is to increase the heat transfer capacity.

FIG. 1 shows the proposed heat pipe, a general view; FIG. 2 is a section A-A in FIG. one; in fig. 3 is a section bB in FIG. 1,

The body pipe contains a housing 1 with evaporation zones 2, a transport 3 and condensation 4, and in the zones 3 and 4 an insert 5 is installed, with perforations 6 in the condensation zone 4, forming an annular gap 7 in this zone with the housing 1, and under insert 5 is installed kapleotbojnik 8,

On the inner surface of the housing 1 in zones 3 and 4, longitudinal grooves 9 are made, forming with an insert 5 in zone 3. Closed channels. In zone 4 in the wall of the housing 1 an additional thread is made with a depth less than that of 9, Perforation 6 of insert 5 helix opposite thread tops 10,

Heat pipe works as follows.

2705282

The heat flux is supplied to zone 2 / evaporation, the coolant boils and its vapors are directed to the upper part of the insert 5, through perforations 6

5 of the insert 5, the steam-like steam flows onto the protrusions of the thread 10 in the condensation zone 4 and condenses. The film of condensate under the action of leaking jets of steam flows over the surface

10 threads 10 into the valleys and then moves along the valleys along the direction to the grooves 9. The inclination of the threads 10 also contributes to the condensate movement. As a result, the condensate collects into vertical slots 9 and drains along them in the form of a film into the evaporation zone 2.. violation of the operation of the pipe due to vapors getting into the slots 8.

20 -,.

This embodiment of the heat pipe allows to reduce its thermal resistance in the condensation zone, to improve the hydrodynamics by freeing

25 days of internal volume from elements transporting condensate, and, consequently, increase the heat transfer capacity of the device.

th

Claims (1)

A HEAT PIPE containing a vertical casing, in the transport and condensation zones an insert is installed, perforated in the condensation zone and forming an annular gap in this zone with the casing, and a drop collector located under the insert, characterized in that, in order to increase the heat transfer capacity, longitudinal grooves are made on the inner surface of the housing in the transport and condensation zones, forming closed channels with an insert in the transport zone, while in the condensation zone in the housing wall an additional thread is made and, a perforation of the insert located opposite the helix of the thread crests. fig1 SU, „1270528