SU1195175A1 - Flat thermal tube - Google Patents

Abstract

1. A FLAT HEAT PIPE, containing evaporation, transport and condensation zones, an artery located in the first two zones, and a capillary-porous structure in the condensation zone, having longitudinal corrugations in contact with opposite flat walls of the pipe, and from one of these the walls of the channels formed by the corrugations of the corrugations are made capillary with the formation of arterial sites, and outside these corrugations there are steam channels, characterized in that, in order to increase the heat transfer capacity, the walls of the pipes In the condensation zone, the sashes are made frizz-free, the corrugations on the other side of the flat walls are also made with similar arterial areas inside and steam channels outside. 2. A pipe according to claim 1, characterized in that when heat is removed from one of the flat walls of the pipe, the steam channels adjacent to the opposite wall are plugged at the boundary between the condensation zone and the transport zone of the port, and the capillary-porous structure relative to the pipe end wall in the condensation zone has a gap.

Description

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The invention relates to heat engineering, namely to heat transfer devices for cooling electronic equipment.

The aim of the invention is to increase the heat transfer ability.

FIG. 1 shows a flat heat pipe, a longitudinal section; in fig. 2 - evaporation zone, cross section; in fig. 3 - condensation zone, cross section; in fig. 4 - condensation zone in the presence of non-condensing gas, the cross-section.

The flat heat pipe comprises a housing 1 with zones 2, 3 and 4 of evaporation, condensation and transport, respectively, an α-shaped artery 5 located in zones 2 and 4 of evaporation and transport, and a capillary-porous structure with longitudinal corrugations 6, with contact vertices with opposite flat walls of the pipe, which are made infillless. The corrugations b are made narrower - capillary, and there are steam channels 7 outside. When heat is removed from one of the pipe walls, steam channels 7 adjacent to the opposite wall can be plugged at the boundary of the condensation zone with the transport zone, and the capillary-porous structure installed with a gap of 8 relative to the end wall

bodies 1 — for removal of non-condensing gas 9. To prevent liquid plugs in steam channels, the distance between the vertices of adjacent corrugations can be chosen equal to h-3h, where h

 Vd / g (p-jf) capillary constant, o is the coefficient of surface tension of the coolant, g is the acceleration of gravity, p, p is the density of liquid and vapor

respectively. If the width of the pipe is small (up to 5h), the capillary-porous structure can be made with a cross section in a form (not shown).

Flat heat pipe works as follows.

When heat is supplied and removed in the corresponding zones, heat and mass transfer is carried out through the pipe with a change in the state of aggregation of the heat transfer medium. The film of condensate coolant, forming

on the walls of the housing 1 in the condensation zone 3, “is drawn in by the corrugations 6 of the capillary-porous structure, which ensures a low thermal resistance of the condensation zone 3. When a non-condensable gas appears in a pipe with unilateral heat removal (Fig. 4), it is pushed back by steam into the channels 7 at the wall opposite to the heat sink.

Claims (2)

1. A FLAT HEAT PIPE containing evaporation, transport, and condensation zones, an artery located in the first two zones, and a capillary-porous structure in the condensation zone, having longitudinal corrugations contacting the tops with opposite flat pipe walls, one side of which the walls of the channels formed by the vertices of the corrugations are made capillary with the formation of arterial sections, and outside these corrugations are steam channels, characterized in that, in order to increase the heat transfer ability, the pipe walls are in zones e condensations are made unfiltered, the corrugations from the side of the other of the flat walls are also made with similar arterial sections inside and steam channels outside. 2. The pipe in π. 1, characterized in that when heat is removed from one of the flat walls of the pipe, the vapor channels adjacent to the opposite wall are plugged at the boundary of the condensation zone with the transport zone, and the capillary-porous structure relative to the end wall of the pipe in the condensation zone | w has a clearance. | A / •behind* :: \ , ί