Method and apparatus for maintaining a uniform temperature...

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

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F25D 17/08 (2006.01) F25D 11/00 (2006.01)

Patent

CA 2694962

A refrigeration apparatus includes an air chiller, a storage enclosure defining a compartment, a duct system, and a valve system. The air chiller blows chilled air into the duct system. The compartment has a first and a second opening, each of which is coupled to the duct system. The valve system has valves that can be moved to route the chilled air so that it enters into the first opening and exits the second opening, or vice versa. In one implementation, the first opening is at the top of the compartment and the second opening is at the bottom of the compartment, and the valve system is controlled by a control circuit that periodically switches the valves (via an actuator) to change the direction of the chilled air. This effectively maintains a relatively uniform temperature throughout the compartment.

L'invention concerne un appareil de réfrigération comprenant un refroidisseur d'air, une enceinte de stockage définissant un compartiment, un système de conduit et un système de soupape. Le refroidisseur d'air souffle de l'air refroidi dans le système de conduit. Le compartiment a une première et une seconde ouverture, dont chacune est couplée au système de conduit. Le système de soupape comporte des soupapes qui peuvent être déplacées pour acheminer l'air refroidi de sorte qu'il entre dans la première ouverture et sorte de la seconde ouverture, ou vice versa. Dans une mise en uvre, la première ouverture est en haut du compartiment et la seconde ouverture est en bas du compartiment et le système de soupape est commandé par un circuit de commande qui commute périodiquement les soupapes (par l'intermédiaire d'un actionneur) pour changer la direction de l'air refroidi. Cela maintient efficacement une température relativement uniforme sur la totalité du compartiment.

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