SU1017899A1 - Flatenned heat pipe - Google Patents

Description

The invention relates to heat engineering and can be used to cool and heat stabilize various objects.

A flat heat pipe is known, comprising a housing with a capillary-porous structure inside and a temperature grating made of heat-conducting material forming steam channels 1 J.

The disadvantages of this design are its complexity and laboriousness of the manufacturing process.

A flat heat pipe with evaporation and condensation zones is known, comprising a housing which is partially filled with heat carrier and has an insert inside it.

The disadvantage of this heat pipe is the low thermodynamic efficiency associated with the reflected capillary head wick that fills the insert.

The purpose of the invention is to improve thermodynamic efficiency. The goal is achieved by the fact that a flat heat pipe with evaporation and condensation zones, containing a partly filled with heat carrier Case with an inset insert made in the form of a prism with a cross section in the form of an equilateral trapezium forming the target channel of variable section forming the case hollow or in the form of a croiot-ffloro body from a material with a low coefficient of heat conductivity,: FIG. 1 schematically shows the proposed heat pipe in FIG. 2 is a cross section A-A in FIG. 1 in FIG. 3 is a section BB in FIG. one; FIG. 4 shows an embodiment of the insert as a solid body. FIG.

A flat heat pipe with evaporation zones 1 and condensation 2 comprises a housing 3 with an insert 4 installed in it in the form of a prggl with a cross section in the form of an equilateral / trapezium fixed rigidly in the housing 3, for example with the help of ribs 5 with the formation of a slot-hole 6 of variable section.

Moreover, the minimum height of the slotted channel 6 in the evaporation zone 1 does not exceed the value of the detachable diameter of the bubble when the heat carrier boils; bodies in large volume.

In this case, the insert 4 can be made hollow in Fig. 1) or in the form of a solid body (Fig. 4, from a material and low thermal conductivity, for example, from fluoroplastic, pipe.: Works as follows. When heat is applied in the evaporation zone 1 in gap b channels form vapor bubbles that quickly grow to the size of channel b height and flatten, turning into vapor cavities that move towards the expansion of channel b, and then into condensation zone 2, where they condense. steam side liquid plugs from the zones of condensation 2 are returned to evaporation zone 1 and the process is repeated. Thus, the coolant undergoing phase transformations circulates in a closed circle formed by the slit channel b around the side surface of insert 4. In the proposed structure, boiling and condensation in the porous structure behind the yen Boiling and condensation in the slit channel, the height of which is co-measuring (1m with detachable bubble diameter when boiling liquid in a large volume 1 6 ...

This reduces the hydraulic and thermal resistance, which leads to an increase in the thermodynamic efficiency of heat flow, moreover, the proposed design significantly reduces the labor intensity in its manufacture.

4ka.Z

Claims (3)

1. A FLAT HEAT PIPE, with zones of evaporation and condensation, containing a body partially filled with coolant with an insert installed inside it, with the exception of the fact that, in order to improve thermodynamic efficiency, the insert is made in the form of a · prism with a cross section in the entrance of the isosceles trapezoid, which forms a slotted channel of variable cross section with the body. 2. The heat pipe according to claim 1, with the fact that the insert is hollow, 3. Heat pipe according to π. 1, on the basis of which the fact that the insert is made in the form of a solid body of a material with a low coefficient of thermal conductivity. 1