Cooler

Details Cooler Cooler

1988-07-12

1989-06-27

Davis, Jr., Albert W.

Heat exchange

Intermediate fluent heat exchange material receiving and...

16510426, 165911, 62304, 62316, 62333, F28D 1502, F25B 1900

Patent

active

048420522

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates generally to refrigeration, and more particularly to coolers.
The invention can be used for cooling solid, liquid and gaseous substances, such as foodstuffs, medicinal and biological preparations, chemical substances, and the like.
In addition, the invention can be used for ensuring temperature operating conditions of heat-stressed elements of equipment, instruments and apparatus.


STATE OF THE ART

There are known coolers of substances in the form of a thermal tube with evaporation and condensation zones
Heat is drawn off the substance being cooled in the evaporation zone, whereas in the condensation zone heat is transferred to a cooling medium. A disadvantage of this device resides in the failure of attaining a cooling effect, that is attaining at the surface of such a tube a temperature, which would be below the temperature of the cooling medium. Another disadvantage is a rather small heat transfer surface area between the thermal tube and the surrounding medium, which results in a sharply limited capacity of the tube to provide desired thermal conditions and low magnitude of heat flow transferred by the thermal tube as a heat transfer element between the flows of "hot" and "cold" media. This disadvantage is most manifest under conditions of gas flows passed over the housing in the zones of evaporation and condensation of the thermal tube.
There is known a cooler in the form of a thermal tube (cf., S.Chi "Teplovye truby. Teoria i praktika", in Russian, Moscow, the Mashinostroenie Publishers, 1981, pp. 39 and 40, FIGS. 1.24, 1.25) comprising a casing with an evaporation zone in which heat is drawn off the substance being cooled, and a condensation zone having outer fins cooled by the flow of gas. In this cooler one of the above disadvantages is obviated, viz., the surface of heat transfer with the flow of gas is substantially increased thanks to the provision of outer fins. As the aforedescribed device, this one allows to cool the substance to a certain temperature, which, however, exceeds the temperature of the cooling medium. However, this cooler fails to cool the substance to a temperature below the temperature of the cooling medium, that is fails to obtain a cooling effect. One more disadvantage of this prior art device is that a higher cooling efficiency can be attained (at a preset inner thermal resistance of the thermal tube and preset temperature of the cooling medium) only through increasing the surface area of outer fins and more vigorous transfer of heat to the flow of gas, which results in a greater weight, size, amount of metal consumed for the fabrication of the cooler, and amount of power consumed by fan drives. Also, such an arrangement can be followed to certain limits dictated by the physical characteristics governing the processes of heat transfer.
Cooling effect is attained by a range of various types and structure of cooling machines and apparatus. However, these apparatus have such inherent disadvantages as much power consumed during operation, complications associated with manufacture, operation and repairs resulting in substantial production and operation costs, and ecological hazards associated with the use of freon, ammonia and other toxic substances as cooling agents.


SUMMARY OF THE INVENTION

It is an object of the present invention to obviate disadvantages inherent in the prior art cooler constructions.
The invention aims at providing a cooler of substances in the form of a thermal tube of such structural arrangement as to ensure cooling effect enabling an increase in the efficiency of cooling.
The aims of the invention are attained by that in a cooler having the form of a thermal tube comprising an evaporation zone where heat is drawn off a substance to be cooled, and a condensation zone having outer fins passed over by a flow of gas, according to the invention, it has a casing open at one side for admitting a flow of gas and accommodating the fins so that their ends define with a wall of the casing at the other side a cavity

REFERENCES:
patent: 1999074 (1935-04-01), Baldwin
patent: 2218407 (1940-10-01), Meyerhoefer
patent: 4381817 (1983-05-01), Brigida et al.

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