Device for cooling and thermal stabilisation of radio electronic equipment elements that work under cyclic thermal effects

FIELD: radio electronics.

SUBSTANCE: device contains thin-walled metal container filled with working substance, inside of which mechanism is located for development of convection in liquid phase, which has the shape of "auger" that rotates around its axis with the help of electric motors that are located outside the reservoir and are energized with source of electric energy through control unit that is electrically connected to temperature detector installed in volume of working substance near mechanism for development of convection in liquid phase of working substance.

EFFECT: higher efficiency and accuracy.

1 dwg

 

The invention relates to electronic equipment, in particular to the cooling of electronic equipment, and can be used to provide the required thermal regime of functioning of items of electronic equipment operating under cyclic thermal effects.

The prototype is a device described in [1]. It represents a thin-walled metal container filled with the working substance, which can be fitted fuel elements with good heat contact Heat dissipated by the equipment, is absorbed by the latent heat of fusion of the substance. During operation the main part of the heat is absorbed by the latent heat of fusion of the substance. When placing items of electronic equipment on the surface of the metal container the process of penetration of the working substance is carried out in a vertical direction from the plane of the setup item of electronic equipment only through a process of heat conduction. At the same time to ensure the movement of the boundary between the solid and liquid phases from the highest to the lowest layer of the working substance requires a constant increase in the temperature of the upper shell relative to the melting temperature to a temperature determined by thermal resistance thickness of the molten RA is Otsego substances.

The purpose of this invention is to improve the efficiency of heat dissipation and accuracy of the stabilization element of electronic equipment.

The objective is achieved by the fact that the inside of the container, a mechanism for the development of convection in the liquid phase of the working substance having the form of a "screw", rotating around its axis by motors located outside of the tank and fed by a source of electrical energy through a control unit, electrically associated with temperature sensors placed in the volume of the working substance near a mechanism for the development of convection. The device shown on the drawing.

The device comprises a thin-walled metal container 1 filled with the working material 2, having a stable melting point coinciding with the temperature strirovaniya posted item of electronic equipment 3. Inside the container 1 has a mechanism for the development of convection in the liquid phase 4 having the form of a "screw", rotating around its axis due to the electric motors 5, located outside of the tank. Power electric motors electric energy is carried out by the control unit 6 is electrically connected with the temperature sensor 7 is placed in the volume of the working substance, near the mechanism for the development of convection in the liquid phase 4.

Environmental Wed the water element of the electronic equipment is isolated by insulation 8.

The device operates as follows.

The heat coming from the item of electronic equipment 3, is transferred to a thin-walled metal container 1 and through the surface of contact between the working material 2. Next, a simultaneous heating of the working medium 2 to the melting temperature and the melting process, associated with the appearance of the liquid phase of the working substance 2 and its movement in a vertical plane in the direction opposite to the placement of the item of electronic equipment 3.

Until then, until the liquid phase of the molten working material 2 does not move to the location of the temperature sensor 7, the control unit 6 does not supply electric power to the mechanism for the development of convection in the liquid phase 4. When the penetration of the working substance 2 to the location of the temperature sensor 7, with the last transmitted electrical signal to the control unit 6, which begins to conduct electricity powering the electric motors 5, which start to rotate, causing the mechanism for the development of convection in the liquid phase 4. The rotation mechanism for the development of convection in the liquid phase 4 in the horizontal plane contributes to the emergence and development in the liquid phase of the working substance 2 convection. Thus the transfer of heat from the heated upper wall oncostomatological container 1 to melting at a constant temperature the interface is generally not conductive, and due to the circulation from the bottom up and back heated and not heated liquid layers. The value of thermal resistance of the molten layer working material 2 is greatly reduced, thereby increasing the intensity of heat transfer between the metal wall of the container 1 and the working substance 2.

Upon termination of the operation of the item of electronic equipment 3 will be the reverse process, i.e. as the solidification of the working substance 2 and the moving phase boundary from the surface opposite to the placement of the electronic element 3, to the surface it is installed, through the control unit 6 in accordance with the signals from the temperature sensor 7 will be a disconnect mechanism for the development of convection in the liquid phase 4 from the power supply and therefore excluded from the process of heat transfer in the metal container 1 with a working substance 2.

LITERATURE

1. Alekseev V.A. Cooling of electronic equipment using consumable substances. M: Energy, 1975.

Device for cooling and thermostabilization of items of electronic equipment (REE), working under cyclic thermal effects, contains a thin-walled metal container with a working substance having a stable melting point coinciding with the temperature stationarystate it item of electronic equipment (REE), characterized in that the inside of the container, a mechanism for the development of convection in the liquid phase of the working substance having the form of a "screw", rotating around its axis by motors located outside of the tank and fed by a source of electrical energy through a control unit, electrically connected with the temperature sensor, placed in the volume of the working substance near a mechanism for the development of convection.



 

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