Abstract:
A refrigerated food preparation table having an evaporator cooling coil and heat transfer fins which are baffled to create two air flows which are cooled to different temperatures. One air flow passes through a laminar air screen and across an open top of a food container, and the other f low passes along the outer surfaces of the food container, thereby cooling the food container and a volume defined therein. This configuration preferably cools the entire volume within the food container to a temperature below 40' F., yet remaining above 32' F. The laminar air screen may be disassembled and separated for the purpose of cleaning.
Abstract:
A display case extender adapted to be mounted upon and in front of the front case wall of an existing refrigerated grocery case, including a display bin for displaying groceries in front of the grocery case and an air intake duct system for drawing cool air from the refrigerated case behind the front case wall to a discharge outlet for discharging cool air at the rear and above the display bin, and an exhaust duct system for drawing the warmer air from the front of the display bin back across the front case wall to a return air intake in the front case wall.
Abstract:
A refrigerated case having an access opening for access to the interior of the case by customers in a store where the case is used. Ducts are provided in the case for circulating refrigerated air across the access opening from a discharge opening at one end of the access opening to a return aperture at the other end of the access opening. The refrigeration system used in the case includes at least one conduit carrying refrigerant at a temperature higher than that of the air bands. At least a portion of this conduit is located adjacent the discharge opening to raise the temperature of the case in the vicinity of the discharge opening sufficiently to impede the accumulation of frost.
Abstract:
A self-contained refrigeration unit wherein two evaporators and fans associated therewith are mounted in a refrigeration space, the first evaporator operating at one evaporating temperature and the second evaporator operating at a lower evaporating temperature. The fans circulate air successively over the first and second evaporators, through a storage area input port, within the storage area of the refrigerator unit and to a storage area output port from which it is returned to the first evaporator. Deflector vanes are provided at the air input port to disperse the incoming air thereby preventing turbulence and to reduce the quantity of ambient air which enters the output port which is located at the side of the storage area opposite the side where the input port is located.
Abstract:
In order to provide an open refrigerated display case in which the product zone remains frost-free and in which the evaporator coils remain ice-free, a small secondary evaporator unit is utilized to dry ambient air which is stored under pressure and metered into the air flow path of the primary cooling system. The display case is coilless, the depressed temperature being maintained primarily through conduction panels forming the bottom and walls of the product zone, which conduction panels are disposed in intimate contact with the refrigerated air supply from the primary evaporator unit. Apertures through the conduction panels are provided to leak cold dry air into the product display zone to attain spillage at a low rate. System efficiency is increased by providing baffles to insure intimate contact of the dry refrigerated air against the thermally conductive panels comprising the walls as well as the bottom panel of the product zone.