Abstract: Unitized air conditioning apparatus for conditioning air for an enclosed space may include: an inlet chamber through which air may be drawn; first and second selectively operable air handling units by which air may be drawn through the inlet chamber and refrigeration apparatus for circulating refrigerant through the air handling units for heat exchange with air prior to discharge into the enclosed space. Air dampers are provided for isolating one of the air handling units, when not operating, from the other air handling unit when it is operating.

Abstract: An air-processing installation designed to ventilate and air-condition seal rooms, as well as an air-processing module designed for the making of an installation of this type are disclosed. With each room to be air-conditioned, there is associated a structurally and functionally independent air-processing module housed in an engine room common to the different air-processing modules and remote controlled, independently of the other air-processing modules, from the associated room. Preferably, the modules are suspended in a mutually juxtaposed state in the engine room. An installation of this type reconciles requirements of hygiene and comfort with easy maintenance while at the same time, occupying the minimum amount of space.

Abstract: A refrigerating apparatus is disclosed. The apparatus comprises a housing having at least one food storage compartment. A fan and an evaporator are provided for generating a stream of chilled air. A delivery duct carries the chilled air to a delivery vent opening in the food storage compartment and an air return duct carries air from a return vent opening in the food storage compartment back to the fan and evaporator. A food storage drawer is mounted in the food storage compartment and is slidably movable between an open and closed position. The drawer has inlet and outlet vent openings to positions adjacent the delivery and return vent openings when the drawer is in its closed position. Movable dampers are mounted adjacent each vent opening and are biased toward a closed position blocking the vent openings.

Abstract: A refrigerator comprising side-by-side freezer and fresh food storage compartments cooled to their respective low and high operating temperatures by the circulation of streams of below-freezing air thereto includes a storage chamber in the fresh food compartment door maintained at an intermediate temperature by conducting air from the freezer compartment through the chamber.

Abstract: A refrigerator having a reversible cold air meat keeper for providing convenient access thereto regardless of the side of the refrigerator that the doors are hinged. The cold air is channeled into a plenum behind the back wall of the refrigerator compartment and there are at least two spaced ports communicating from the plenum into the chamber. The cold air meat keeper has a conduit extending from the rear wall thereof. In one predetermined mounting position of the meat keeper, the conduit removably couples with one of the ports for receiving cold air from the plenum. In the alternate predetermined mounting position of the meat keeper, the conduit removably couples with the other port for receiving cold air.

Abstract: A cooling chamber for drawing down freshly picked and field warmed unitized (for example in cartons stacked on pallets) vegetables, such as cauliflower, is disclosed. Freshly picked cauliflower is placed in rectangular cartons in side-by-side stacks of four extending approximately fourteen cartons high. A group of individual pallets (typically 10 to 12) so loaded are typically placed in the field on a transport chassis and brought to the vicinity of the cooling chamber where they are simultaneously unloaded by a multi-pallet forklift truck. The chamber receives multi-pallet load through an open door and is inserted into the chamber. This chamber has a rear seal which conforms to the periphery of the load and defines in the interstitial volume between the chamber backwall and load a warm air return plenum to forced draft refrigeration apparatus. The load when placed within the chamber has a door closed to form an air-tight seal.

Abstract: A cover for refrigerated display cases formed from a plurality of flexible, transparent, PVC strips attached together in side by side relation to form panels which extend across the display case access opening to provide a barrier which substantially reduces the heat transfer between the store environment and the display case contents.

Abstract: Apparatus for cooperation with an upright freezer or refrigerator, having an interior chamber with an opening and a door for closing the opening, includes a flexible generally planar pie shaped cold air retainer having first and second generally rectilinear sides converging to an apex and a generally arcuate third side and means for securing the retainer to the opening and the door of the associated freezer or refrigerator with the generally planar surface disposed in substantially horizontal relationship.

Abstract: A curtain comprised of a plurality of individual separable strips is provided for use across the front or top of a display type refrigerator such as used in supermarkets or the like. A sufficient number of strips are attached along the upper edge of the cabinet opening to span the width of the opening, each strip being of a length sufficient to span the length of the opening. Each strip detachably connects to the cabinet and is also detachably connected to one another whereby one or more strips may be removed from the cabinet and attached piggy back fashion to one or several strips for loading and unloading the refrigerator.

Abstract: The present invention relates to a weather tight cover which overlies the portion of a through-the-wall air conditioner that protrudes into a room. The cover has a peripheral sealing gasket to tightly fit against the molding or wall surfaces surrounding the opening for the air conditioner to thereby tightly seal the entire unit to provide for a draft free, insulated cover that conserves energy by substantially reducing heat losses through the interior air conditioner openings and through gaps between the outer air conditioner housing and the edges of the opening through the wall.

Abstract: An improvement in refrigerated display cabinets in which barrier doors and one or more guard air bands protect the primary refrigerated air band which is circulated within the cabinets during time periods when the barrier door is opened. The cabinets may be equipped with air defrost systems. When two guard air bands are employed, the outermost of these is directed across the outside surface of the barrier door. The air defrost system can incorporate a door opening mechanism which provides a gap between the barrier door and the access opening in order to permit ambient air through-flow for defrost purposes.Control circuitry can be controlled by opening of the barrier doors in order to actuate the guard air band movement.

Abstract: Apparatus for use in a self-contained air conditioning unit for controlling the operation of a door. The combination of pins extending from the door and slots defined by the end surface of a casing provide lost motion rotation operation of the door. Additionally, a friction wedge is provided which both secures the door in any of a range of positions and further serves to allow the door to open a predetermined amount when the unit is energized and air flow is discharged through the opening covered by the door.

Abstract: Curtain structure for substantially covering the access opening of an open-sided, display-type, refrigerated food cabinet. A first curtain comprises a flexible sheet prestressed to roll up and fixed at its upper edge to the ceiling of the cabinet inboard of the access opening. The first curtain may be unrolled and its bottom edge attached to the floor of the cabinet to substantially block air movement into and out of the cabinet. A second curtain comprises a plurality of side-by-side, elongate strips of flexible transparent sheet material, fixed together at their upper ends and supported on the cabinet at the top of the access opening. The lower ends of the strips are free of each other and terminate slightly above the bottom of the access opening. The second curtain is spaced away from the closed position of the first curtain by an air layer providing a thermal barrier across the access opening when access to the interior of the cabinet is not needed.

Abstract: An air flow control assembly in a refrigerator having a freezer compartment on top and a fresh food compartment on the bottom separated by a partition and interconnected by an air duct located at the rear of the compartments. The air duct has an air inlet opening in the freezer compartment and an air outlet opening in the fresh food compartment. A movable damper opens and closes the air duct outlet opening and a storage pan is located in air flow communication with the air duct outlet opening. The storage pan has a stationary cover. There is a movable control mechanism located at the front of the storage pan, a push rod linkage member cooperating at one end with the damper to open and close the air duct outlet opening upon movement of the push rod linkage member and the other end is connected to the control mechanism for moving the push rod linkage member.

Abstract: The present invention is directed to a method and apparatus for heat generation or heat exchange in which a primary medium emits heat while passing through an evaporator in which there is a heat-transfer medium which thereby evaporates or boils and thereby increases the pressure of the heat-transfer medium. Once the pressure has increased, it is transferred to a condensor where a secondary medium is heated from the condensation of the heat-transfer medium. The method and device according to the present invention increase the efficiency, particularly when the primary medium is at a low temperature, by intensifying the heat at least in a portion of the evaporator.

Abstract: The partition between fresh food and freezer compartments of, for example, a "top mount" refrigerator is movably mounted to vary the volume split between the two compartments. A lever actuated reciprocal drive mechanism is provided to translate the partition to its desired partition without the need to remove the partition or the food in the refrigerator to accomplish the change. The thermal break between the two compartments is maintained by an extensible section mounted between the movable partition and the fixed front mullion of the refrigerator.

Abstract: An aerodynamic enclosure for a refrigerated trailer. The enclosure fits over the upper portion of the front wall of the trailer, enclosing the factory installed refrigeration unit and motor. The enclosure has an upper front opening which fits around the air opening of the refrigeration equipment. A second front opening is covered with hinged doors to provide access to the refrigeration equipment. A pair of side openings are covered by hinged doors and provide access to the refrigeration controls and equipment. A top opening provides an outlet for air from the enclosure. The enclosure is symmetrical about its vertical axis and is aerodynamically contoured to reduce wind resistance and provide substantial economies in fuel consumption. An auxiliary door may be used to cover the upper front opening of the enclosure when the refrigeration equipment is not in use.

Abstract: A household refrigerator-freezer has an air passageway formed through the partition between the freezer and the fresh food compartment. Air is controllably passed by convection through the passageway for maintaining the fresh food compartment in a preselected temperature range. Apparatus is associated with the passageway for controllably opening and closing the air passageway.