Dual-service evaporator system for refrigerators

F - Mech Eng,Light,Heat,Weapons – 25 – D

Patent

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Details

F25D 17/08 (2006.01) F25D 17/06 (2006.01)

Patent

CA 2304097

The disclosed refrigeration appliance includes a fresh-food compartment (32) and a freezer compartment (34) with a plenum or duct (36) therebetween housing a single evaporator (30) and at least one fan (20) for establishing air flows through the plenum (36) in opposite directions, an air flow pattern through the plenum (36) and the fresh-food compartment (32) alternating with an air flow pattern through the plenum (36) and the freezer compartment (34). One-way air valves (22, 24, 26, 28) are located at opposite ends of the plenum (36), on opposing sides of the fan (20), and provide communication between the food compartments and the plenum. The one-way air valves allow an air flow to be established, selectively, either through the plenum (36) in the fresh-food compartment (32) or through the plenum (36) and the freezer compartment (34). Operating in a fresh-food compartment cooling mode, air from the fresh-food compartment (32) circulating over the evaporator coils (30) serves to defrost the evaporator coils.

La présente invention concerne un appareil de réfrigération comprenant un compartiment à denrées fraîches (32) et une armoire de conservation (34) reliés entre eux par une gaine (36) de circulation d'air renfermant, d'une part un unique évaporateur (30), et d'autre part au moins une soufflante (20). Cette soufflante (20) entretient dans la gaine (36) des flux d'air de sens opposés. En l'occurrence, la circulation d'air passant par la gaine et le compartiment à denrées fraîches (32) se fait en alternance avec la circulation d'air passant par la gaine et l'armoire de conservation (34). Des clapets d'air (22, 24, 26, 28) montés aux extrémités opposées de la gaine (36), de chaque côté de la soufflante (20), gèrent la communication entre les compartiments et la gaine. Les clapets permettent à la circulation d'air de se faire, sélectivement, soit via la gaine (36) dans le compartiment à denrées fraîches (32), soit via la gaine (36) dans l'armoire de conservation (34). Dans le cas du mode de fonctionnement à refroidissement du compartiment à denrées fraîches, l'air provenant du compartiment à denrées fraîches (32) et circulant sur les serpentins de l'évaporateur (30) sert à dégivrer les serpentins de l'évaporateur.

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