SU605070A1 - Heat tube - Google Patents

Description

one

The invention relates to heat exchangers with an intermediate coolant, namely heat pipes.

Heat pipes are known that contain a housing partly filled with a coolant with evaporation and condensation zones, divided by a transverse sub-section into compartments connected by a condensate-type conduit and located along the axis of the casing by the paired conductor 1.

When one of the ends of the casing is heated and the other is cooled, the coolant evaporates in the evaporation zone, the resulting bunches through the steam pipe enter the condensation zone, condense on the walls, and the condensate drains out of the wall and is retained by a transverse partition. Above the septum (fluid accumulation occurs, resulting in a decrease in the amount of its iB evaporation zone, which leads to a decrease in the heat flux transferred. After the fluid level above the septum exceeds the upper point of the siphon tube, all the liquid over the septum is poured into the evaporation zone, which leads to a sharp increase in heat flow.

A disadvantage of the known tel0 (outgoing pipes is the impossibility of changing the amplitude and frequency of the cycles of change in the transmitted

heat flux at constant temperatures of evaporation and condensation zones.

The purpose of the invention is to change the frequency and amplitude of fluctuations of the heat flow at constant temperatures of the evaporation and condensation zones.

This is achieved by the fact that the condensate conduit is made of a plastic material, for example copper, and is located on the outside of the housing.

A heat pipe consists of a housing 1, divided by a transverse vacuum pipe | 2 with compartments connected by a siphon condensate line 3, made, for example, of

copper, and steam line 4, located along the axis of the housing. In the operating mode, the heat transfer fluid is distributed inside the housing 1, in the upper compartment in the form of a layer 5 and in the lower one in the form of a film 6 with a wetting limit 7 in the lower part. The case is installed in the partition 8, the partition Yush, her source and heat sink. The housing contains zones 9 and 10 of evaporation and condensation.

When Zooya 9 evaporates and cools the condensation zone 10, the coolant boils, forming steam through the steam line 4 to the upper compartment and condenses there, and the condensate accumulates above the partition 2 as layer 5. At the same time, the amount of liquid

in the evaporation zone, the transmitted heat flux decreases and, consequently, decreases.

Condensate accumulation in the upper compartment of the pipe occurs until its level exceeds the level of —Sifsia condensate product 3. After this, all the condensate in the siphon of the condensate of conduit 3 flows into the lower OTiceiK iKOpnyca I, which leads to (an increase in the transmitted heat flow.

When changing-and, for example, plastic deformation of the knee height of the condensate line 3 made of plastic material, such as copper, the amount of heat-transfer fluid above the partition 2 also changes, which causes iK to change a-amplitude and frequency of oscillations of the transmitted flow of burning temperatures evaporation and condensation zones.

Claims (1)

Invention Formula A heat pipe, a body partially filled with a heat carrier, with evaporation and condensation zones, is divided by a transverse partition into compartments connected with a condensate pipe of a syphonic type and (a steam pipe located along the axis of the housing, so as to change the frequency and a) flow at (CONSTANT temperatures of evaporation and condensation zones, the condensate line is made of plastic material, such as copper, and is located on the outside of the housing. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 125566, cl. F 23D i 17/00, 1959. I. I I tn eight