RU200277U1 - RADIO ELECTRONIC UNIT - Google Patents

Abstract

The utility model relates to radio electronics, in particular to devices that dissipate heat from heat-loaded elements of electronic blocks operating in difficult conditions. The technical result of the utility model is to ensure the stability of heat removal in conditions of dustiness and obstructed air access from the bottom of the electronic unit. The radio-electronic unit contains a housing consisting of side walls, a base and a top cover, inside of which at least one functionally assembled fuel element is installed, and through holes are made in at least two side walls. The housing contains shock-absorbing supports that ensure the movement of the electronic unit in the vertical direction and change the size of the gap between the base of the case and the installation surface of the electronic unit. On the outer surface of the body base, ribbing is made in the form of protrusions, and the height of the ribbing protrusions in the central part of the base is less than the height of the ribbing protrusions along the perimeter of the base. The side walls of the body are made protruding below the level of the outer surface of the base by the amount of ribbing protrusions located along the perimeter of the base. Through holes are made in the side walls below the level of the outer surface of the base and connect the surrounding space of the radio electronic unit and the inner space formed by the ribbing of the base. 1 wp f-ly, 3 dwg

Description

The utility model relates to radio electronics, in particular to devices that dissipate heat from heat-loaded elements of electronic blocks, operating in difficult conditions, installed on shock absorbers and exposed to various climatic influences.

The well-known design of radio-electronic units, which provides cooling of heat-loaded components, which consists of a set of radiators coupled with fans. The main disadvantages of such cooling are increased noise and low reliability associated with a limited service life of the fans, while the operating conditions are considered stationary. In the presence of constant vibration loads, dust or the influence of meteorological factors, such systems are not acceptable.

Known passive cooling system (RU 2604825, publ. 10.12.2016, IPC G06F 1/20, H05K 7/20) radioelements in electronic blocks, selected as an analogue, containing fuel radioelements, the surfaces of which through thermal interfaces are coupled with the zones of evaporation of heat pipes ... The system provides direct contact of radioactive elements with heat pipes through their ends, while the pipes are brought out in opposite directions outside the radio-electronic housing, soldered to the radiator fins and rigidly interconnected limiters.

The disadvantages of this design are its technological complexity and massiveness (overall dimensions), to ensure the problem of stability of heat removal, the efficiency of the system is excessive, the solution is focused on the presence of free space around the electronic unit.

Known electronic unit with air cooling (RU 2569492, publ. 11/27/2015, IPC H05K 7/20), selected as a prototype, containing a housing cooling system formed by an inlet on the rear wall, outlet openings on the front panel, bottom cover, internal and external left side, right side, as well as rear walls, upper inner and outer covers made with the possibility of passing between the inner and outer walls and covers of the cooling air flow, and the side inner walls are made in the form of radiators, inside the case is installed at least , one functionally assembled fuel element, inside the body of which a middle wall with a divider is located parallel to the rear wall, installed with the possibility of forming the main compartment and the air distribution compartment, in the inner side walls and the inner top cover of which additional inlets are made, while the fuel element is t in the form of a radio electronic module, including a printed circuit board with electrical radio products, mounted on a radiator, closed by a module cover with holes, with the possibility of forming an internal cooling channel, placed inside the main compartment parallel to the middle wall and fixed on the inner side walls of the case by means of a wedge mechanism ensuring a snug fit side and upper end contact surfaces of the radiator to the surfaces of the inner side walls and the upper housing cover, with the possibility of convective heat removal through the internal cooling channel and conductive heat removal to the housing walls, while the internal upper cover is configured to form with the external upper cover by means of a partition two compartments containing transitional inlet and outlet openings located coaxially with openings in the module cover.

The disadvantage of the prototype is its sensitivity to the purity of the air, in terms of the presence of dust, solid particles, etc. in it, which ensures contamination of the radio elements located inside the housing, while this solution also assumes free air access from the bottom of the electronic unit.

The technical result of the utility model is to ensure the stability of heat removal in conditions of dustiness and obstructed air access from the bottom of the electronic unit.

The technical result is achieved in that the radio-electronic unit contains a housing consisting of side walls, a base and a top cover, inside of which at least one functionally assembled fuel element is installed, while at least two side walls have through holes, the housing contains shock-absorbing supports that ensure the movement of the radio-electronic unit in the vertical direction and change the size of the gap between the base of the housing and the installation surface of the radio-electronic unit, ribbing in the form of projections is made on the outer surface of the housing base, and the height of the ribbing projections in the central part of the base is less than the height of the ribbing projections along the perimeter bases, the side walls of the body are made protruding below the level of the outer surface of the base by the amount of ribbing protrusions located along the perimeter of the base, through holes are made in the side walls below the level of the outer surface of the base and connect about the circling space of the radio-electronic unit and the inner space formed by the ribbing of the base.

The essence of the utility model is illustrated by drawings:

fig. 1 - General view of the radio-electronic unit (top);

fig. 2 - General view of the radio electronic unit (bottom);

fig. 3 - installation of the electronic unit on the surface.

FIG. 1-3 the following positions are presented:

1 - case,

2 - side walls,

3 - base,

4 - top cover

5 - fuel element,

6 - ribbing,

7 - the central part of the base,

8 - base perimeter,

9 - level of the outer surface of the base

10 - through holes,

11 - shock-absorbing supports,

12 - installation surface of the radio-electronic unit,

13 - clearance,

14 - the space formed by the ribbing of the base.

The electronic unit contains a housing 1 (Fig. 1), consisting of side walls 2, a base 3 (Fig. 2) and an upper cover 4. The fuel element 5 (Fig. 3) is installed inside the housing 1. On the outer side of the base 3 of the housing 1 ribbing 6 in the form of protrusions, and the height of the ribs 6 in the central part 7 of the outer surface of the base 3 is less than the height of the ribs 6 along the perimeter 8 of the outer surface of the base 3. The side walls 2 of the body are made protruding below the level 9 of the outer surface of the base by the amount of ribs 6 protrusions, located along the perimeter of the base 3. In the side walls 2 below the level 9 of the outer surface of the base 3 through holes 10 are made. The housing 1 is fixed using shock-absorbing supports And to the installation surface 12 of the radio electronic unit with a gap 13. Through holes 10 connect the surrounding space with the space 14, formed by ribbing 6.

The utility model works as follows. Thermal energy from the fuel element 5 is transferred to the base 3 and spreads along the side walls 2 and the top cover 4, dissipating into the surrounding space (Fig. 3). On the outer surface of the base 3, ribbing 6 is made, shallow in the central part 7 of the base 3, which provides a sufficient thickness of the base for efficient heat removal from the fuel element 5, and deeper along the perimeter 8 of the base 3 to increase the surface area of the body and, accordingly, to ensure heat dissipation into the surrounding space. The heated air from the space 14 formed by the ribbing of the base 3 through the through holes 10 in the side walls 2 and the gap 13 enters the external environment, providing heat removal. However, due to the proximity of the radio electronic unit to the surface of the installation 12 with a gap 13, natural air convection is hindered. Additional activation of air convection is provided by installing the housing 1 on shock-absorbing supports 11, which, under the action of external vibration, move the radio-electronic unit up or down, which in turn ensures a change in the air volume between the base 3 and the installation surface of the radio-electronic unit 12 due to the displacement of heated air from the gap 13 and drawing in cold air. Through holes in the side walls 2 and multidirectional ribbing of the outer surface of the base provides more intensive mixing of air, which ensures stable heat removal and dissipation of heat energy from the fuel element 5 into the environment, including due to the movement of heated air through through holes 10 in the side walls 2 and clearance 13.

The technical result is achieved by coordinating the shock absorber stroke and the size of the gap between the body of the radio-electronic unit and the installation surface of the radio-electronic unit, which makes it possible to include in the cooling process an external influencing factor - vibration.

This solution is most effective when the ambient air is dusty and air is difficult to access from the bottom of the electronic unit.

In the prior art, no analogue is found, characterized by features identical to all essential features of the claimed utility model.

The proposed utility model is technically feasible and industrially realizable at the instrument-making enterprise, the tests carried out confirm the achievement of the claimed technical result.

From the foregoing, it can be concluded that the proposed technical solution meets the conditions of patentability of a utility model, namely, it is new and industrially applicable.

Claims (2)

1. An electronic unit containing a housing consisting of side walls, a base and a top cover, inside of which at least one functionally arranged fuel element is installed, while at least two side walls have through holes, characterized in that that the body contains shock-absorbing supports that ensure the movement of the radio-electronic unit in the vertical direction and change the size of the gap between the base of the body and the installation surface of the radio-electronic unit, ribbing in the form of projections is made on the outer surface of the body base, and the height of the ribbing projections in the central part of the base is less than the height of the ribbing projections along perimeter of the base, the side walls of the body are made protruding below the level of the outer surface of the base by the amount of ribbing protrusions located along the perimeter of the base, through holes are made in the side walls below the level of the outer surface of the base and connect the surrounding simple the weakness of the radio-electronic unit and the internal space formed by the ribbing of the base. 2. The electronic unit of claim. 1, characterized in that the ribbing in the central part of the outer surface of the base is made mainly along the long side of the housing.

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