SU966944A1 - Cabinet for cooling radio electronic units - Google Patents

Description

(50 CASE FOR COOLING RADIO ELECTRONIC BLOCKS

. . one . The invention relates to precision instrument making, in particular, to electronic equipment devices providing cooling and ventilation of electronic units. A cabinet for cooling radio-electronic units is known, comprising a housing with pototoe-arranged partitions in which openings of different sizes are made for supplying a cooling medium, forced and natural cooling units 1. However, between the partitions of each subsequent floor in the direction of flow of the cooling medium, the temperature of the cooling medium increases. The purpose of the invention is to increase the cooling efficiency. The goal is achieved by the fact that in the cabinet for cooling electronic units, comprising a housing with partitions with floor-by-floor partitions with openings of different sizes for supplying cooling medium, forced and natural cooling units located between the partitions, the openings in the partitions are aligned with one another the possibility of forming an air duct with a cross section decreasing in the direction of flow of the cooling medium, and the forced cooling units are located in the duct. The drawing shows a wardrobe, general view, cut. In case 1 with sequential vertical air blowing, horizontally oriented partitions 2 are installed, forming sections 3 in which natural cooling blocks f (shown with hatching in the drawing) are placed above the partitions, and forced cooling blocks 5 in the air duct 6. Air cools electronic components successively in each section 3 through the duct, the flow area of which is 39669

is bounded by partitions 2. In the course of the air from the section to the section, the surface area of the partition increases, and the flow area of the duct decreases in accordance with the expression s Si

f

W;

where S is the flow area of the first air duct from the air entering the section device,

5 flow area of the duct of the i-th section of the device,

air velocity blowing in

from the first air inlet into the pr-chbor section, m / s; air velocity blowing in

W. i-th section of the device, m / s. Ventilated units are unevenly distributed in sections with a consistent decrease in their number along the height of the cabinet.

The device works as follows.

The air entering the device warms up as it moves from section to section. The speed of the cooling air is consistently increased, in each section along the air flow, according to the change in passage

the cross-sections of the partitions in such a way; that increasing with an increase in air velocity, the heat transfer coefficient between the air and the body of the radioelectronic component compensates for the increase in air temperature.

invention formula

A cabinet for cooling the radioelectronic units, comprising a housing with partitions disposed in it with openings of different sizes for supplying a cooling medium, forced and natural cooling units located between the partitions, characterized in that, in order to increase the cooling efficiency, the openings in the partitions are coaxially single another with the possibility of forming an air duct with a section decreasing in the direction of flow of the cooling medium, and the forced cooling units are placed , Duct.

Sources of information taken into account in the examination

1. USSR author's certificate No. 210906, cl. H 05 K 7/20, 09.28.66.

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Claims (1)

Claim Cabinet for cooling electronic block comprising a housing with a floor by floor _in placed therein by partitions with openings of different sizes for feeding a cooling medium, the blocks of forced and natural cooling arranged between the partitions, characterized in that, in order to improve cooling efficiency, the openings in the partitions are arranged coaxially one another with the possibility of forming an air duct with a cross section decreasing in the direction of flow of the cooling medium, and the forced cooling units are located in, in air duct.