SU1423910A2 - Heat pipe - Google Patents

Abstract

Invention m. used for intensive heat removal from current distribution buses, contacts of powerful current switches, circuit breakers. The purpose of the invention is to increase the intensity of heat transfer when the evaporation zone is heated by electric current. The insert (B) 4 is mounted coaxially in the casing 1. Selection

Description

4: N3

WITH

with

TO)

| 5 V 4 fit tightly against the wall of the case. Through holes 6 are made on the rounded surface of the flange for removal of 7 coolant vapors formed in the annular channel. The end cap 8 in 4 has holes 9 for the passage of fluid. The 2-evaporation zone and B 4 are connected in parallel to the current source. Their electrical resistances are inversely proportional to the magnitudes of their surfaces in contact with the coolant. Inside the case 1 is installed In 10 of a smaller diameter.

one

The invention relates to a testing technology and can be used for intensive removal from distribution buses, contacts of powerful current switches, and circuit breakers.

The purpose of the invention is to increase the intensity of heat transfer when the evaporation zone is heated by electric current.

FIG. 1 shows a heat pipe 1b, a section; FIG. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. one.

The pipe has a housing 1 with evaporation zones 2 and condensation 3, in which insert 4 is coaxially mounted. The upper end of insert 4 is made with flange 5, which fits tightly (for example, solder) to the wall of case 1. On the rounded surface, flange 5 is made through- Holes 6 for removal of the coolant vapor formed in the annular channel 7. To prevent falling condensate from entering channel 7, holes 6 are fixed in protrusions 6 that extend several millimeters beyond the flange surface 5. The end cover 8 in the insert 4 has openings 9 for the passage of fluid into channel 7. Evaporation 2 evaporation and insert 4 in parallel connected to a current source, and their electrical resistance is inversely proportional to the magnitude of their surface B 4, and is similar to it. Flanging B 4, 10 are located in contact. 10 times. Placed with a gap relative to the end of zone 2. When the voltage is connected to zone 2, the coolant in the channels boils and the steam enters the condensation zone 3. The condensate enters the channels 7. 11. As a result, an intensive heat sink from the heated surfaces, B 4 and the casing is provided, since heat transfer during boiling in narrow channels is more intense than with boiling in a large volume. 3 or

contact with the coolant. At the same time inside the housing 1 there is additionally installed a second TO insert of a smaller diameter than the last insert 4, which is similar to the last, with the formation of an annular channel 11 and a gap 12 at the cover 8 for the passage of heat sink into the channels 7 and 11. On the flanged surface of the upper end

0 of the insert 10, holes 13 are made, the same as in the insert 4, for the passage of steam from the annular channel 11 to the condensation zone 3.

Heat pipe works as follows

5 way.

When the voltage is connected to zone 2 of the evaporator, an electric current flows through the casing of this zone and the insert 4, which produces heat. Moreover, the value

0 current and heat release rate. in the inlet 4 is larger than in the pipe body in the evaporation zone 2 (its electrical resistance is less). The coolant in the annular channels boil- 5 et. Vapor bubbles merge into vapor cavities that float. Passing through the openings 6 and 13 of the inserts 4 and 10, the steam enters the condensation zone 3, where it condenses. Condensation condensation along the inner wall of the condensation zone 3, flanging the inserts 4 and 10 and the inner surface of the insert 10 flows down and through the gap 12 and the aperture 13 enters. annular channels 7 and 11. As a result, such a cir35

intense cooling is provided

Claims (1)

the heat sink from the heated surfaces of the insert 4 and the body 1 of the pipe, since the heat transfer during boiling in narrow channels is more intense than with boiling in a large volume. Invention Formula Heat pipe according to auth. No. 5,661,117, of its diameter than the first, and the aim of increasing the intensity of heat transfer when the evaporation zone is heated by electric current, the test area 13 the pairs and the insert are connected in parallel to the current source, and they are electrically; the resistances are inversely proportional to the magnitudes of their surface contacting with the coolant, while inside the case the second insert is additionally installed less it is flexible to it, flanging the inserts in the contact position, and the second of them is placed with a gap relative to the end of the evaporation zone.