SU1691986A1 - Radio electronic unit - Google Patents

Abstract

The invention relates to electronics and can be used in the design of electronic units. The purpose of the invention, the expansion of operational capabilities, is achieved by creating refrigerant circuits occurring between sub tanks and corrugations of the heat exchanger, as well as by double cooling the power supply by natural convection and forced airflow. Case 1 is divided into two compartments by a corrugated heat exchanger 14. In a hermetic compartment there are subunits 2, a circuit board 7, a partition 5 sec from the version, in which a fan 6 is installed, which creates forced refrigerant circulation. The mounting plate 7 is fixed with its ends on the base and the cover of the housing 1. The second compartment is made with inlet and outlet openings. A fan 10 is installed in the inlet. A power supply source 11 is installed in the rear panel window 9, so that its vertical fins 12 protrude on the outside of the housing 1, and the horizontal fins 13 are placed between the corrugations of the heat exchanger 14. 2 Cp. f-ly, 3 ill. GO С

Description

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The invention relates to radio electronics and can be used in the design of electronic units in instrument making,

The aim of the invention is to expand the operational capabilities.

The goal is achieved by forming circulation channels of the refrigerant between the subunits and corrugations of the heat exchanger, as well as by cooling the power source both by natural convection and by forced ventilation.

Figure 1 shows the electronic unit, a horizontal section; figure 2 - section aa in figure 1 (rotated); in fig. 3 - heat exchanger with a comb plug, fragment.

The electronic unit (Fig. 1) contains a body 1 of sheet material, subblocks 2 installed horizontally in compartments 3 and 4, between which the first fan 6 of the internal circuit is fixed to the partition 5. Subunits 2 are attached to the mounting plate 7, which is mounted vertically against the cover and the bottom of the case. Between the mounting plate 7 and the side walls of the housing there are gaps 8 forming channels for circulating the air flow of the inner loop in the horizontal plane. A second fan 10 is installed at the inlet of the panel 9 of the second compartment. A power supply 11 with vertical cooling fins 12 on its outer wall and horizontal cooling fins 13 on the inner wall is installed in the rear panel 9. The heat exchanger 14 is made of a corrugated panel 15 (FIG. .2), between the corrugations of which there are horizontal ribs 13 of the power supply 11. The comb plug 16 (FIG. 3) serves as a sealing cap and is connected to the corrugated panel 15 by means of a nut, welding, gluing or other means. The tooth 17 of the comb plug 16 isolates the hermetic compartment of the housing 1 from the environment, and the gaps between the teeth serve as outlets for the cooling air of the external circuit. The corrugated panel 15 of the heat exchanger 14 has flanges 18 that are inserted into the U-shaped guides 19 secured to the cover and the base of the housing.

Electronic unit (Fig.1-3) works as follows.

The fan 6, mounted on the partition 5, pumps air from compartment 4 to compartment 3. The air flow of the internal circuit (shown by a glccl), the passage between the subunits 2, passes into the gap 8, between the mounting plate 7 and the side wall of the housing 1. then passes between the inner surfaces of the corrugations of the heat exchanger 14 and bounded by the flanges 18 inserted into the U-shaped guides 19, and the teeth 17 by the comb plug 16 are returned through the second gap 8. Thus, a closed internal horizontal airflow contour is formed, which passes the sub-blocks, removes heat from the logic elements, and the passage between the corrugations, the heat exchanger transfers this heat to the heat exchanger 14. The cooling air (shown by large arrows) is drawn in from the surrounding space by the second fan 10 installed on the rear panel inlet 9, and The passage on the other side of the heat exchanger 14 (between its corrugations) cools both the corrugated panel 15 itself and the horizontal ribs 13 of the power supply 11. Passing along the heat exchanger 14, the cooling air is blown out through the gaps between the teeth 17 of the comb-shaped plug 16. The vertical fins 12 of the power supply 11 deliver heat to the surrounding space and are cooled by natural convection.

Claims (3)

1. An electronic unit comprising a case, a corrugated heat exchanger installed in it with the formation of two compartments, the first of which is sealed with subassemblies with a mounting plate, and the second is made with inlet and outlet openings, the first fan installed in a sealed compartment , a second fan installed in the inlet, and a power source, which is also distinguished by the fact that, in order to expand its operational capabilities, the circuit board is fixed with its opposite ends on the base and the cover the corrugated heat exchanger parallel to the corrugated heat exchanger with the formation of side channels; Thus, one of its cooling fins is located between the corrugations of the heat exchanger and parallel to them, while others protrude from the outside of the housing. 2. The unit according to claim 1, starting from the fact that the casing is equipped with guides fixed on its base and a lid in which a corrugated heat exchanger is installed with its ends and a comb plug installed at the end heat exchanger adjacent to the outlet. 18 3. Block 1 and 2, characterized in that the sealed compartment is provided with a partition with a hole installed perpendicular to the mounting plate, and the first fan is fixed in the said hole, the sub blocks being arranged parallel to the corrugation of the heat exchanger. nineteen Schi 2 75 15