초록 ▼

An improvement in refrigeration assemblies for use in conjunction with cooler structures in which food products are preserved in which an assembly of unitary, modular construction is utilized to selectively provide the refrigeration of the air mass. The assembly can be air defrosted by arranging for

An improvement in refrigeration assemblies for use in conjunction with cooler structures in which food products are preserved in which an assembly of unitary, modular construction is utilized to selectively provide the refrigeration of the air mass. The assembly can be air defrosted by arranging for the flow through of ambient air to defrost the evaporator coils. At the same time, the flow of ambient air can be blocked against entry into the refrigerated air mass by the use of movable baffles. Cover gates are arranged on the assembly to permit the through flow of ambient air during the defrost cycle of operation. The refrigeration assemblies can be employed for retrofitting and on an interchangeable basis for structures to be refrigerated.

대표청구항 ▼

In a refrigeration assembly in combination with a structure having side and top walls which encloses a mass of cooled air, and said assembly having at least one low temperature element arranged for contact by the refrigerated air, and an air moving means for circulating air into contact with said lo

In a refrigeration assembly in combination with a structure having side and top walls which encloses a mass of cooled air, and said assembly having at least one low temperature element arranged for contact by the refrigerated air, and an air moving means for circulating air into contact with said low temperature element; the improvement comprising: an assembly housing for containing said air moving means and said low temperature element integrally formed at an elevated position in the top wall of said refrigeration assembly, ambient air inlet and outlet openings formed in said assembly housing, first and second substantially planar cover gates for blocking ambient air flow through said ambient air inlet and outlet openings during refrigeration cycles of operation, cover gates operating means operatively connected to said gates, a defrost control means operable in response to frost conditions to actuate said operating means for opening said cover gates upon th initiation of defrost cycles and to close said cover gates at the termination of the defrost cycles, said low temperature element affixed to the inner surface of said top wall and extending into the interior of said structure and surrounded by said mass of cooled air during a refrigeration cycle, and said low temperature element having air outlet and inlet areas defining opposing sides thereof, said air outlet and inlet areas positioned in a straight line path passing substantially perpendicularly between said ambient air inlet opening and said ambient air outlet opening to enable the formation of a low resistance straight line ambient air flow path through said low temperature element and through said assembly during defrost cycles of operation, and said air outlet and inlet areas of said low temperature element positioned to intersect a straight line flow path of the refrigerated air band moving within said structure during a refrigeration cycle, said air moving means operative to circulate both refrigerated and ambient air through said air inlet and outlet areas of said low temperature element in both the refrigeration and the defrost cycles of operation, respectively.