RU2338345C1 - Cabinet for radio electronics equipment - Google Patents

Abstract

FIELD: radio electronics.

SUBSTANCE: creation of structure of cabinet for radio electronics equipment, which contains casing with plates of highly heat-conducting material installed one above another and form horizontal sections, in which detachable units of radio electronics equipment are installed, system of heat removal that contains of thermal pipes with thermal contact with plates of highly heat-conducting material in the field of thermal pipe evaporation and back wall of cabinet, which is also made of highly heat-conducting material, on external side of which zone of thermal pipe condensation is fixed. Plates of highly heat-conducting material are fixed to back wall of cabinet through heat-insulating gaskets, for elimination of reverse heat leakages. Back wall of cabinet from the side of radio electronics equipment also has heat-insulating coating, which serves also for reverse transfer of heat from zone of thermal pipe condensation to the cabinet volume. Casing is fixed to the back wall of cabinet for creation of channel during operation of cooling system in mode of forced air cooling. For creation of forced air cooling mode there is fan electrically connected to ventilator. On back wall of cabinet from the side of thermal pipes fixing at least one temperature detector is installed, being electrically connected with unit of fan control. Advantage of suggested design is also absence of considerable additional power inputs for control of temperature mode of radio electronics equipment in cabinet.

EFFECT: higher efficiency of heat removal from cabinet volume and provision of possibility to control heat removal without change in heat removal system and cabinet design.

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Description

The invention relates to electronics and is intended for use in the design of cabinets for placement of electronic equipment with the release of thermal power during its operation.

It is well known that its reliability substantially depends on the thermal mode of operation of electronic equipment, and the urgency of the issues of designing cooling systems for electronic equipment is undeniable. When placing electronic devices in cabinets, attention must be paid to the efficiency of removing excess heat generated by them from the cabinet volume.

Known devices for the placement of electronic equipment with the solution of heat removal from it, for example, a device containing a housing and circuit boards with electronic equipment, while on the boards there are heat-conducting plates made of foil, which are connected via a fastening means to the housing of heat-conducting material. The heat generated through the plates, the fastening means, is transferred to the housing and, with the help of radiation, is discharged from it [1] (A.S. 1638817, Н05К 7/20, 1987). This device is ineffective from the point of view of ensuring the thermal regime of electronic equipment.

Known cabinet electronic equipment, comprising a housing with plates located one above the other and forming horizontal sections, which are placed removable blocks of electronic equipment, a heat sink system [2] (patent 210670, class N05K 7/20, 1998).

The disadvantages of this device is the complexity of the design and system to ensure the thermal regime of electronic equipment.

A cabinet of electronic equipment is also known, comprising a housing with a rear wall, plates located one above the other and forming horizontal sections for placing electronic equipment, the end contact of each plate with the rear wall is carried out through a heat-conducting paste. On the outside of the rear wall, fastening means are provided for the plate with additional cooling means on the outside. The plate can be made with fins - with protrusions during free cooling, and at the same time can be equipped with a casing and a channel for air supply when using forced air cooling, or the plate can be made with a channel for water supply when using water cooling [3] (patent No. 2211551, 7H05K 7/20).

The disadvantages of this cabinet design are the presence of significant thermal resistance for heat flux from the cabinet into the environment, caused, firstly, by the end contact of the plate with the back wall and, secondly, the impossibility of providing an ideal (from the point of view of thermal resistance) mounting an additional plate with back wall. In addition, this design does not provide regulation of the mode of operation of the heat sink system in the process of operation of electronic equipment.

The aim of the invention is to increase the efficiency of heat dissipation from the cabinet by reducing thermal resistance and providing the ability to control heat dissipation without changing the heat sink system and cabinet design.

This goal is achieved by creating a cabinet design for electronic equipment (see Figs. 1 and 2), comprising a housing 1 with plates of highly heat-conducting material 2 located one above the other and forming horizontal sections, in which removable blocks of electronic equipment 3 are placed, a heat sink system, consisting of heat pipes 4 brought into thermal contact with plates of highly heat-conducting material in the region of the evaporation zone of the heat pipe and the back wall of the cabinet 5, also made of highly heat-conducting about the material on the outside of which the condensation zone of the heat pipe is attached. Plates of highly conductive material 2 are attached to the rear wall of the cabinet 5 through heat-insulating gaskets 6 to eliminate reverse heat inflows. The rear wall of the cabinet 5 from the side of the electronic equipment also has a heat-insulating coating 7, which also serves to reverse heat transfer from the condensation zone of the heat pipe to the cabinet volume.

A casing 8 is attached to the rear wall of the cabinet to create a channel 9 when the cooling system is operating in forced air cooling mode. To create a forced air cooling mode, there is a fan 10, electrically connected to the fan control unit. At least one temperature sensor (not shown) is installed on the rear wall of the cabinet 5 from the side of the heat pipe fastening, electrically connected to a fan control unit (not shown).

The device operates as follows.

When the equipment is turned on, the power is released on the modules 3. The indicated power is transmitted through the plates 2 to the evaporation part of the heat pipe 4, and through it to the rear wall 5 of the cabinet, where it is discharged into the environment, due to which the normal temperature mode of electronic devices inside the cabinet. In the fan control unit, the minimum temperature of the rear wall of the cabinet 5 and, accordingly, the condensation zone of the heat pipes 4, at which forced blowing is required for more efficient heat removal, is set. When thermal power is exceeded in the peak mode of operation of electronic equipment, the temperature of the rear wall of the cabinet rises, which is recorded by the temperature sensor, and a signal is generated on the control unit to turn on fan 10. Thus, in case of excess of thermal power relative to normal operation, additional heat exchange intensification is used from the back wall of the cabinet and, accordingly, the condensation zone of the heat pipes.

An advantage of the proposed design is also the absence of significant additional energy costs for regulating the temperature regime of electronic equipment in the cabinet.

Claims (1)

A cabinet of electronic equipment, comprising a housing with a rear wall, plates or plates of highly conductive material, located one above the other and forming horizontal sections for placing electronic equipment, characterized in that the cabinet contains a heat sink system consisting of heat pipes brought into thermal contact with the plates of highly heat-conducting material in the region of the evaporation zone of the heat pipe and the rear wall of the cabinet, also made of highly heat-conducting material, on the outside the condensation zone of the heat pipe is attached, and plates of highly heat-conducting material are attached to the rear wall of the cabinet through heat-insulating gaskets, and the rear wall of the cabinet from the side of the electronic equipment is also insulated, and a casing is attached to the rear wall of the cabinet to create a channel when the cooling system is operating in the mode forced air cooling created by a fan electrically connected to the fan control unit, the control unit is electrically connected as min with one temperature sensor located on the rear wall of the cabinet from the side of the heat pipe mounting.

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