SU1699024A1 - Radio-electronic unit - Google Patents

Abstract

The invention relates to radio electronics and can be used in systems for automated control of technical means, in computer equipment, and also in instrumentation systems. The purpose of the invention is to increase reliability by creating a favorable temperature condition without the use of additional cooling means while at the same time improving the maintainability of the apparatus. The goal is achieved by the fact that a block of heat conducting elements and a heat sink has a gasket made of heat conducting dielectric, the relief of which repeats the configuration of gaps between the heat generating elements and the heat sink between the elements and the heat sink, made in the form of a heat pipe with a sinusoidal evaporation part and a spiral condensation part, mounted on the outer side of the rear wall of the frame and at the same time, the radiator, which, when installed in the cabinet, is located outside the case, carries out a heat release directly into the environment of the cabinet. 2 yl

Description

The invention relates to electronics and can be used in devices of automated control systems, in computer equipment, as well as in instrumentation systems.

The purpose of the invention is to increase reliability by creating a favorable temperature condition without the use of additional cooling means.

The goal is achieved by the fact that in a block having a frame with back and front walls, inside of which there is a board with heat-active radioelectronic elements, electrical connectors are installed on the top and bottom walls of the frame, the condensation zone of the heat pipe is extended beyond the rear wall of the frame and made in the form of a vertical a spiral radiator, with both ends connected to the evaporative part of a heat pipe located in the plane of the board with heat-generating elements; when installing the unit into the cabinet, the radiator is located outside the case, carried out a heat release directly to the environment

The device uses a heat pipe, in which the condensation section is made in the form of a spiral and at the same time is a radiator that carries out a heat release directly to the environment without additional funds and cooling devices.

Fig, 1 shows a constructive block diagram; in fig. 2 - diagram of the heat remover.

In the frame 1, the board 2 is fixed with heat-generating elements 3. The electrical connectors 4 are installed on the upper and lower walls of the frame. with an inclination angle of less than 5 °, it provides an efficient condensate drain under the action of a gravity force.

Traditionally, electric power is supplied through electrical connectors mounted on the rear wall of the unit. The proposed device provides for their installation on the upper and lower walls of the block, due to which the back wall of the block is released for building up the condensation section of the thermal pile - radiator,

Due to the highly developed heat transfer surface of the condensation section of the heat pipe made in the form of a spiral, pulled out of the box through the back wall of the device, heat loss is carried out directly into the environment under conditions of free convection.

The calculation shows that with the vertical size of the board. 180 mm, the heat-dissipating surface area of the radiator (F) with a coil length of 3.6 m is 4 3.6 3.14 0.045 m2.

8 conditions of free convection heat transfer coefficient (a) is in the range of 6-8 W / m. According to the conditions of operation at

boron at ambient temperature up to 40 ° С; overheating of electronic elements should not exceed 70 ° С.

From the Fourier equation, determine the amount of heat load

 At where D with 40-70 ° C, equal to 9.45 watts.

Under realistic conditions, the electronic units of this type have a heat dissipation in the order of 6 watts.

Thus, the proposed radio-electronic unit is equipped with an autonomous cooling system and does not affect the thermal mode of neighboring devices of the device. With

This does not require additional air, water, or other cooling systems. The reliability of the electronic components is enhanced by creating favorable thermal operating conditions.

FORUMAWLAH AND ISLANDS

An electronic unit comprising a frame, a radiator mounted on the outer side of the rear wall of the frame, electrical connectors, boards with heat-generating elements, a heat pipe with

condensation and evaporation zones, in order to increase the

reliability by creating favorable temperature conditions without the use of additional cooling means; electrical connectors are installed on the upper and lower walls of the frame; the condensation zone of the heat pipe is extended beyond the rear wall of the frame and is made in the form of a vertical spiral radiator, both ends connected to the pipe located in the plane of the board with heat-generating elements.

Evaporating 5o on

/

FIG.

Condensing area

Claims (1)

Claim An electronic unit containing a frame, a radiator mounted on the outer side of the rear wall of the frame, electrical connectors, boards with heat-generating elements, a heat pipe with condensation and evaporation zones, characterized in that, in order to increase reliability by creating a favorable temperature regime without using additional cooling means, electrical connectors are installed on the upper and lower walls of the frame, the condensation zone of the heat pipe is outside the rear wall of the frame and made a vertical helical radiator, both ends connected to the evaporator part of the heat pipe, located in the plane of the board with the fuel elements. 1699024 Fig C Zone condensation