SU566117A1 - Thermal tube - Google Patents

Description

I

The invention relates to the field of heat engineering.

Heat pipes are known that contain a vertical casing, partially filled with a heat carrier, with evaporation and condensation zones and a coaxial insert placed in the casing, forming an annular channel in the evaporation zone.

However, they do not have significant thermal resistance, which reduces the intensity of heat transfer.

The aim of the invention is to intensify the evaporation process. This is achieved by the fact that the upper end of the insert is made with flanging, tightly adjacent to the wall of the housing and having through holes on the rounded surface for otppa formed in the annular channel fumes of the thermal support. In the annular channel, it can be installed along its height (1, 1 longitudinal ribs and a choke can be installed inside the insert, for example, and a pinhole) .l with a calibrated screwdriver or in several layers of the grid.

FIG. Figure 1 shows schematically the proposed heat pipe, a section; in FIG. 2 the same, section A-A of FIG. one; in fig. 3 node 1 in FIG. one.

The pipe has a housing 1 with evaporation zones 2 and condensation zones 3, in which the insert 4 is coaxially mounted. The upper end of the insert is made with flanging, which fits tightly against the wall of the housing

1. On the rounded part of the flange, through holes 5 dL of steam bubbles 6 are released from the annular channel 7 between the insert 4 and the housing 1. To prevent Dani from flowing down

condensate in the channel 7 in the holes x 5 fixed inserts, the upper end of which protrudes beyond the flanging a few millimeters. In the lower part of the insert 4 holes 8 are made for the passage

heat carrier. Inside the insert is placed choke 9 in the vice hole of a sufficiently small diameter or in the form of several layers of the grid.

Along the entire length of the annular channel, longitudinal {dabra 1O are installed.

When heat is applied to the evaporation zone 2 in channel 7, steam bubbles 6 are formed. Since the separation radius of these bubbles is comparable to the characteristic size of channel 7, a vapor cavity is formed, which. . as it grows, it moves intensely upward under the action of Archimedes' forces and hydrostatic pressure. Passing through the openings 5 of the insert 4, the steam enters the condensation zone 3, where it condenses. The resulting condensate flows first along the inner surfaces of the housing 1, and then the insert 4 and returns to the channel 7 through the holes 8 in the insert.

The proposed heat pipe makes it possible to significantly reduce the thickness of the near-wall layer of liquid, which constitutes the main thermal resistance, which ultimately increases the amount of perforated motive, other things being equal.

ULOBNYAK,

Claims (3)

1. Heat pipe containing a vertical body, partially,; filled coolant, with areas of evaporation and condensation ;. and a coaxial insert, placed inside the case, with the formation of an annular channel in the evaporation zone, characterized in that, with the intensification of the evaporation process, the upper end of the insert is made with flanging tightly adjacent to the Koj wall. Pusa and having on a rounded surface through holes for removal h vaporized coolant in the annular channel. 2. A pipe according to claim 1, characterized in that in the annular channel along longitudinal ribs are installed throughout its height. 3. A pipe according to claim 1, characterized in that a throttle is installed inside the insert, for example, in the form of a diaphragm with a calibrated hole or in the form of several layers of a grid. Sources of information taken into account in the examination: l.B.S-Loifki-n, AnexspeciTnetitaS stuv of iJie two-ptiase ierrnou plioti tube CSME Tt oinsoictiotis% .oe-H ,, Aop- / Sepi.97. eight 2 Vae G