Abstract: An air conditioner unit that includes a housing containing a heat exchanger and a centrifugal impeller positioined behind the heat exchanger for drawing comfort air over the exchanger surfaces and returning the air to a comfort zone. A support wall is placed between the heat exchanger and the inlet of the impeller and an orifice is mounted in the wall for directing conditioned air into the fan inlet. A cylindrical shield is also mounted upon the wall and surrounds the orifice. The shield is axially aligned with the impeller and its end face positioned adjacent to the inlet face of the impeller. The axial length of the orifice from the wall is less than that of the surrounding shield so that a wide circular throat is established around the entrance region of the impeller. The velocity of air drawn through the gap between the shield and the impeller is thus reduced within the throat to minimize its adverse effect on the primary air flow entering the orifice.

Abstract: A post mix fruit juice dispenser having a refrigerated cabinet at the top which houses separate containers for different juice concentrates. The machine mixes potable water with the concentrate on demand. The potable water is cooled in an ice bath at the rear of the cabinet, and the same refrigeration system which cools the ice bath provides a source for cooling air circulated in the cabinet about the concentrate containers. The concentrate containers and their discharge assemblies may be removed from the machine for cleaning, but the containers may be replenished through filling assemblies at the top of the cabinet without removing them.

Abstract: Air circulation system having a multi bladed radial fan supported within a venturi is provided. The fan is located within an aperture in a plenum chamber and the chamber has an outlet through which chilled air may be ejected. Refrigerant coils are located adjacent the outlet of the chamber so that air is drawn from the room into the plenum chamber by the fan and forced across the coils and returned as chilled air into the room.

Abstract: To cool electronic heat producing elements and components which are normally connected to a heat sink, an evaporator containing a circulating coolant is thermally connected to each of the heat producing components. The evaporator absorbs the heat from the heat producing element. The coolant is boiled or evaporated within the evaporator. The pressure on the gas produced by the evaporation is maintained at a constant pressure. This will result in a uniform temperature of the liquid as it is being evaporated. The heat producing components, therefore, will be maintained at substantially a constant temperature. Several heat producing elements may be connected to a single evaporator. For retrofitting existing units, individual evaporators are made to attach to the heat sink between the heat producing component and the heat sink.

Abstract: A refrigerator has a machine chamber disposed in a bottom part of a refrigerator body, a cover for covering the machine chamber, upper heat discharge passages formed in side edge portions of a rear surface of the refrigerator body, lower heat discharge passages formed in offsetted portions of both sides of the machine chamber cover, and heat discharge ports provided in a wall of each of the lower heat discharge passages for providing a communication between the lower and the upper heat discharge passages. A main condenser of the refrigerator is mounted on a top of the refrigerator body and is covered by a decorative cover.

Abstract: A freezing device for biological products comprises an impeller arranged at the top of a sleeve located above a basin of liquid nitrogen. The impeller causes a rising flow of nitrogen vapors within the sleeve and a descending flow outside it, the impeller and sleeve being arranged within a casing. When cooling is completed, the sleeve is lowered into the basin of liquid nitrogen. The invention is applied to the freezing of biological products stored in tubes, ampoules, phials, or straws arranged at the base of the sleeve.

Abstract: The invention relates to an air conditioner for cooling electrical parts which are situated in a cabinet. A coolant circulation consisting of evaporator, condenser and compressor is provided. The air heated by the electrical parts is blown past the evaporator inside a housing and is returned into the cabinet to be cooled. A condenser is provided for heat dissipation. The housing of the air conditioner is subdivided into a first area and into a second area by a wall, whereby the wall seals the respective air streams from one another. All components sensitive to dirt, dust, etc. are accommodated in the first area, whereas the condenser and an aerator are situated in the second area.

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 refrigerator including a freezer compartment with a quick-chilling chamber having a first container section with a door for access to the interior of the container section from outside the freezer compartment and a second air-duct section. There is airflow communication between the first container section and freezer compartment, airflow communication between the second air-duct section and freezer compartment and airflow communication between the first and second sections near the top thereof. There is also provided means for moving air from the freezer compartment in a path through one section and the other section of the quick-chilling chamber and back into the freezer compartment for a selectable period of time. Thermal insulation is provided between the quick-chilling chamber and the freezer compartment.

Abstract: Control system in refrigerator apparatus including a freezer compartment having a quick-chilling chamber with a door for access to the interior thereof from outside the freezer compartment. There is a timer-operated fan to introduce cold air from the freezer compartment into the quick-chilling chamber and means to maintain the chamber at above-freezing temperatures after termination of fan operation. A display panel accessible to the user may be used to manually select the desired chill temperature of the item, the quantity of the item and the unit size of the item. A sensor determines the temperature of the air being introduced into the quick-chilling chamber. All of the input values are accumulated in the memory of a microcomputer and by comparing the values the microcomputer will predict when the item to be chilled will reach the desired temperature and set the timer run time accordingly. A manual switch is provided for starting the timer to run.

Abstract: A refrigerator for maintaining high humidity therein where the evaporator surfaces are oversized and maintained at a frost-free temperature, continuous forced air is passed over the evaporator and over a drip water dish within the refrigerator compartment, and the compartment is vented to the outside of the refrigerator.

Abstract: A thermostatically and hygrostatically controlled cabinet for storing foodstuffs has a food storage chamber partially surrounded by an elongated space communicating with the food storage chamber through a grid. A fan establishes forced air circulation inside the elongated space, through the grid and inside the food storage chamber. An evaporator and a provision of water are located inside the elongated space and a compressor and a condenser are positioned outside the elongated space and the storage chamber. Thermostatic control means start the compressor when the temperature inside the food storage chamber exceeds a rated value and, after a time delay, also start the fan.

Abstract: In a refrigerator comprising a cabinet, means to refrigerate contents of a chamber within the cabinet, a door for access to such chamber, a fan to circulate air within such chamber, and a switch operable with the door to a first mode wherein the switch enables the fan when the door is closed and to a second mode wherein the switch disables the fan when the door is opened, a relay having contacts arranged to be closed after a delay of preset duration from energization of the relay and to be opened upon deenergization of the relay is connected so as to be energized in the second mode of said switch, so as to be deenergized in the first mode of the switch, and so as to enable the fan when the contacts are closed. A lamp indicates that the contacts are closed.

Abstract: An evaporator assembly for a heat transfer unit comprises a sealed thermally conductive container and a duct mounted in the container. Channels are formed between the walls of the duct and those of the container and thermal transfer fins are attached to the inside surfaces of the walls of the container and located in the channels. An evaporator extends transversely across the width of the duct and a defrosting heater bank is located downstream from the evaporator in the duct. Suitable fans and a drive motor are mounted at one end of the duct to circulate air or other gas through or across the evaporator, through the duct, and through the channels. During use of the assembly, heat is transferred from the container walls and the fins to the circulating air and the heat is then extracted from the air or gas by thermal transfer through the evaporator. The assembly provides a buffer between the heat source and the evaporator in order that the evaporator may operate in a near moisture free environment.

Abstract: Tropical and subtropical regions having high ambient temperatures and relative humidity can be locally subjected to cooling and dehumidification according to the invention by a tower in which, upon a post or other vertically extending support, a pair of vertically aligned spaced apart air guides are provided. The lower air guide includes the cooler which can simultaneously condense moisture from the air while the upper air guide can include a heat dissipator of a refrigeration cycle, the air guides being associated with respective blowers and inducing ambient air into the air guide at a location between them and displacing the air through the air guides into heat exchanging relationship. The tower can also be used to collect potable (drinking) water by condensation from the atmosphere.

Abstract: The invention relates to an installation for distributing refrigerated air, wherein an air distributing shaft is provided with a series of pairs of air insufflation orifices and air recovery orifices, two orifices of each pair being connected to a container. A refrigerator-centrifugal fan unit is mounted on the shaft between an air inlet passage and an air outlet passage. On each side of the inlet passage and of the outlet passage, the shaft comprises channels arranged in spike-fashion, which present a sharp reduction in section at the level of each of the air insufflation or recovery orifices. These reductions in section are determined in order to have the same static pressure of insufflation or recovery at the level of the different air insufflation or recovery orifices. The invention is more particularly applied to ships carrying refrigerated containers.

Abstract: A heat exchanger for refrigerator evaporators of the type consisting of helically coiled refrigerant-carrying tubing with radially inward extending fins formed along the length of the coiled tubing, with the air to be refrigerated directed across the axis of the coil turns. The coil turns are skewed from the helix angle to expose a greater proportion of the fins into the air flow path between the coil turns so as to increase the air flow contact with the fins. The skewing is created by relatively offsetting opposite portions of the coil turns along the air flow path across the helical coil to increase the obliqueness of a portion of each coil turn with respect to the direction of air flow.

Abstract: A food service system for institutional or other use is provided by a stack of insulated trays and a cart. In one embodiment the cart includes a heating and/or cooling source with an outlet and a return. The trays are provided with openings to permit the passage of heated or cooled air from the outlet through the stack to the return. In another embodiment the trays and cart are combined with a refrigeration unit and a heating unit to permit simultaneous heating and cooling of food portions held in the trays.

Abstract: A two-piece electric fan motor mounting arrangement for use in a domestic refrigerator cabinet which is designed to provide improved dampening of motor torque vibrations while allowing for easy assembly by reducing the number of parts. The mount includes a blower orifice housing and a U-shaped bracket, each molded of plastic, with the result that the mount has no effect on the motor magnetic flux path, thus permitting more efficient motor performance at the designed R.P.M. of the fan impeller while eliminating the requirement for electrical grounding.

Abstract: A cold storage installation having a part thereof which is available for rapid freezing consists of a number of open compartments which are disposed one following the other and intercommunicating. Certain consecutive compartments are associated with means such as fans for creating air circulation conditions necessary for their utilization as freezing spaces. These consecutive compartments are adapted to be covered in longitudinally, possibly by fixed walls and movable elements associated with the compartments or possibly in part at least by elements on pallets to be located in the compartments.The freezing compartments are preferably upstream of the refrigerating equipment which may be located in an upper passage.The whole array of compartments is preferably provided with corridors, air circulation passages being located parallel to the corridors and transversely at the ends of the corridors.

Abstract: A food service system for institutional or other use is provided by a stack of insulated trays and a cart. In one embodiment the cart includes a heating and/or cooling source with an outlet and a return. The trays are provided with openings to permit the passage of heated or cooled air from the outlet through the stack to the return. In another embodiment the trays and cart are combined with a refrigeration unit and a heating unit to permit simultaneous heating and cooling of food portions held in the trays.

Abstract: In the refrigerator according to the present invention, the driving motor is provided outside of the refrigerator and hence the heat load of the freezing cycle can be decreased by the value corresponding to the value of heat which would be generated by the driving motor provided inside of the refrigerator, thereby reducing the time of cooling operation. Additionally, a bush is used to block the gap around the driving shaft penetrating into the refrigerator and hence a complete shut-off is established between the interior and the exterior of the refrigerator. Since the driving motor is housed in a completely sealed housing so that construction of the driving motor free from lock troubles is available. In addition, in the case of construction wherein a liquid polyurethane is filled in the insulated wall of the refrigerator for foam-forming therein, leakage of the liquid polyurethane can be fully prevented.

Abstract: A forced air refrigeration system for a side by side combination refrigerator freezer wherein a single, vertical evaporator is enclosed in a vertical passageway formed between a cover panel and the rear wall of the freezer compartment. The large opening in the cover panel near the midsection of the evaporator provides an inlet from the freezer compartment into the passageway. A fan, mounted on the panel in front of the inlet opening, moves air from the freezer compartment through the opening into the middle of the evaporator. Air moved by the fan splits into two components, one moving upwardly through the top half of the evaporator and one moving downwardly through the lower half of the evaporator. After being cooled by the evaporator, the two air components exit at respective outlets formed at the upper and lower ends of the passageway. Circulation of air from the freezer compartment through the refrigerator compartment is accomplished by means of thermally controlled air ducts.

Abstract: A method of and an air conditioning unit for re-conditioning air supplied by a central air conditioning system and circulated through a space to be air conditioned, characterized in that water condensate produced by the evaporation of a refrigerant is vaporized by the heat of condensation of the refrigerant and is discharged from the ceiling chamber above the space air conditioned.

Abstract: An uninsulated container for use in insulated holds has an inlet opening at the base of the container for the introduction of cooled air, a plenum chamber for distributing the air from the opening to the interior of the container, and an outlet opening at the top of the container for the return of the air to the hold. A closure member is provided for the inlet opening for use when the container is removed from the hold and this closure member is mounted within the container. The plenum chamber is formed within a transverse frame member at the bottom of one end wall of the container while the outlet opening is in the top of the other end wall.

Abstract: A cooling arrangement, particularly for a no-frost refrigerator, including a heat-insulated housing, containing air; heating means located in said heat-insulating housing for heating a portion of said air; cooling means located in said heat-insulating housing for cooling a portion of said air; and air guiding means for mixing at least a portion of the heated air with a portion of the cooled air.

Abstract: An economizer kit for attachment to the outside of a return air duct of air conditioning systems. The kit comprises what is termed a housing having end walls and side walls which define a conduit open at both ends. At one end of the conduit, there is a by-pass passage formed by two chambers that under certain operating conditions are in open communication with each other but under other operating conditions, are separated by a movable damper, one of these chambers is an inlet chamber for air from the return air duct of the air conditioning system, while the other chamber is an outlet chamber for air returning to the return air duct. At the opposite end, the conduit has a partition extending longitudinally part-way in the conduit thus deviding the conduit into an outlet passage for air from the inlet chamber and an inlet passage adapted to communicate with the outlet chamber. The outlet passage discharges to ambient atmosphere and the inlet passage receives ambient atmospheric air.