RU2043704C1 - Cooling system for heat-liberating units - Google Patents

Abstract

FIELD: heat-transfer apparatuses. SUBSTANCE: sealed-case cooling system has sealed case 1, ribbed heat exchanger, forced-convection fan 6. Used as heat exchanger are surfaces of all walls of sealed case 1 ribbed inside and outside; cooling and cooled current of coolant are separated by air 4 placed at certain distance from walls of case 1 in central part of inner space; forced-convection fan 6 is mounted directly on air duct 4 under heat source 5. EFFECT: simplified design. 1 dwg

Description

 The invention relates to heat exchange equipment and can be used in sealed enclosures with heat sources, which must be removed.

 In the known double-circuit (sealed) cooling systems (heat removal) [1] heat exchangers are performed as a separate unit. For relatively large structures such as a cabinet, this solution is justified by its sufficiency. But for compact cases with the need to divert the increased power of heat sources, this solution is not effective enough and leads to large differences in steady-state external and internal temperatures, which reduces the reliability of the equipment located in the housing.

 Closest to the technical nature of the present invention is the "Cooling system of a sealed enclosure" [2] This system is a heat exchanger mounted on the wall of a sealed enclosure, and two side panels fixed at a distance from each other. One side panel forms part of the wall of the sealed enclosure and has ribs fixed to one side of the panel facing the outside of the enclosure. The ribs are fixed between the plates extending inward from the opposite ends of the side panels at a certain distance, so that a central chamber is formed between the two groups of ribs. A fan is mounted on the casing, suctioning air between the side panels and returning it to the enclosed space. The disadvantage of this system is its low efficiency of heat dissipation, associated with the limited area of the heat exchanger and the location of forced convection on the fan casing, which does not provide local cooling of the heat source and the differentiation of the cooling (heat removal) and cooled (heat transfer) heat carrier flows (air or other possible for this gas).

 The solved problem of the invention is to increase the cooling efficiency of heat sources located in a sealed small-sized case and thereby increase the reliability of the equipment located in this case.

 The task is carried out by intensifying the heat exchanger and optimizing the internal circuit of the heat removal circuit, namely, the heat exchanger is the surface of all walls of the casing activated by the area from the outside and from the inside by ribs, the cooling and cooling coolant flows are separated from each other by an air duct located at a certain distance from the casing walls , in the central part of its internal volume, and the fan (s) of forced convection is located (s) directly on the duct.

 The drawing shows a cooling system of a sealed enclosure. The basis of the cooling system is a sealed enclosure 1. The walls of the enclosure are activated in terms of area by the outer 2 and inner 3 ribs. In the central part of the internal volume of the housing 1, a duct 4 is located at a certain distance from the walls of the housing 4. Cooled objects (heat sources) 5 are placed inside the duct 4.

 At the inlet of the duct (in this case, in its lower part), directly under the heat sources 5, a forced convection fan 6 is installed.

 The dynamics of heat dissipation is as follows. The forced convection fan 6 creates excess pressure inside the duct 4 and thereby forms a cooling stream 7. Passing through the heat sources (cooled objects) 5, the cooling stream 7 removes part of the heat and, moving further upward under pressure, expires through an open section of the duct 4 into the space between the duct 4 and the walls of the housing 1, turning into a cooled stream 8. Next, the cooled stream 8, divided into separate jets channel-by-channel between the duct 4 and each side wall, rushes down into the zone p voltage generated by the forced convection fan 6, while giving part of the heat to the finned walls of the housing 1. The amount of heat received by the walls of the housing 1 is dissipated by the outer finned surfaces of the walls of the housing 1 due to thermal radiation and natural convection of the external coolant (external atmosphere). The cooled stream 8 of the internal coolant under the action of the fan 6 is again pumped into the internal volume of the duct 4 for the next heat removal cycle.

A significant difference of the invention are:
use as a heat exchanger of the finned outside and inside of all the walls of the sealed enclosure;
separation of the cooling and cooled coolant flows placed at a certain distance from the walls of the housing in the central part of its internal volume by an air duct;
installation of a forced convection fan directly on the duct under heat sources.

 The combination of the above differences can improve the cooling efficiency of heat sources located in a sealed small-sized case, and thereby improve the reliability of the equipment located in this case.

 At present, the design documentation for UILE 656.121.001 has been developed for the cooling system of the sealed enclosure, according to which prototypes have been made.

Claims (1)

 COOLING SYSTEM FOR HEATING UNITS, comprising a sealed housing-heat exchanger with finned walls on the outside and inside, a chamber for accommodating heat-generating units located in the central part of the internal volume of the sealed housing-heat exchanger, and a fan for forced convection of cooling air, characterized in that the chamber for the placement of the fuel blocks is made with the possibility of the formation with the walls of the sealed enclosure-heat exchanger side channels for cooling flows about air in communication with it, moreover, a fan for forced convection of cooling air is located at the inlet of the chamber for placing heat-generating units with the formation of an air outlet for the flow of cooling air.