Abstract: A computer cooling system has gaseous refrigerant compressed in a compressor and delivered to a first stage condenser. The first stage condenser includes a heat exchanger through which return coolant from the building heating system circulates to partially condense the gaseous refrigerant. The partially condensed refrigerant is directed to a second stage condenser wherein a portion of the refrigerant is diverted and flashed through an expansion valve into the second stage condenser to fully condense the nondiverted portion of the refrigerant before delivering it to the cooling coils of the computer. A pressure regulator valve controls the pressure and temperature of the diverted refrigerant in the second stage condenser to ensure that the nondiverted refrigerant is fully condensed. The used diverted refrigerant is discharged from the second stage condenser through the pressure regulator valve into an accumulator which also collects return coolant from the cooling coils of the computer.

Abstract: A refrigerant control, for a room air conditioner, operates to reduce the load on the compressor by throttling the flow of refrigerant to a predetermined number of circuits in the condensor, while allowing the flow of refrigerant to the remaining circuits to be unaffected.

Abstract: Disclosed is a method of operating an air conditioner having a plurality of indoor units connected to a common outdoor unit as heat source machine. When operation of a plurality of indoor units is dictated depending upon the temperature differences between the room temperatures and the set temperatures therefor, the indoor unit having the smallest temperature difference is determined among those indoor units which are to operate, and the amount of heat exchange is limited in the indoor unit having the smallest temperature difference to advantageously perform air conditioning in respective rooms in which the indoor units are provided.

Abstract: Refrigerating apparatus comprising freezing and refrigerating compartments, to be controlled to different temperatures, which are provided with respective evaporators. During operation of a compressor, liquid refrigerant is always fed to the freezer evaporator, but is selectively fed to the refrigerator evaporator by function of a feed control device which comprises a vapor bubble pump as its essential component. The feed control device is supported by an insulation board which, in turn, is mounted on the back surface of an inner shell forming the freezing compartment such that a ratio of a distance 1 between the outer surface of the inner shell of the freezing compartment and the innermost surface of the feed control device with respect to the thickness m of the insulation wall filling the heat-insulation space defined by the inner shell and an outer shell of the freezing compartment.

Abstract: A refrigerating apparatus comprising at least two evaporators which are controlled at different temperatures by a refrigerant, conduits for conducting the refrigerant to the evaporators, a rising portion which is formed in one of the conduits and which has an irregularly formed inner surface, a heater winding around the outer surface of not only the irregularly formed portion but also the portion of the conduit above the irregularly formed portion in order to produce smoother, more effective bubbling action.

Abstract: Disclosed is a commercial refrigeration system of a type having at least one compressor, a suction header and a liquid header at a central location or machinery center, a condenser and a plurality of remotely located evaporators, wherein a suction-to-liquid heat exchanger is embodied in the suction header of the system and all of the relatively cool gaseous refrigerant returning to the central location from the remotely located evaporators is maintained in heat exchange contact with substantially all of the primary stream of relatively warm liquid refrigerant produced by the operation of the compressor and condenser.

Abstract: Apparatus and a method for operating a refrigeration system without reverse cycle defrost are disclosed. A heat exchanger is divided into a plurality of zones, one zone being constantly utilized as a subcooler to both defrost said zone and to subcool the refrigerant. The remaining zones of the heat exchanger are utilized as an evaporator as is known in the art. A selector valve which is capable of indexing liquid refrigerant flow between zones and receiving gaseous refrigerant from the remaining zones is also disclosed. Additionally, a header arrangement having both expansion means and a conduit controlled by check valve is utilized to direct refrigerant flow from the subcooled zones to the remaining zones of the heat exchanger which act as an evaporator.

Abstract: A three-way magnetic valve as a switching device for refrigerators with two different temperature compartments operated with only one refrigeration machine, has an axial bore hole in a tubular housing with an inlet to the bore hole of the housing and an outlet at each end of the housing, a rod-like plunger with a sealing member at end, axially movable in the bore hole so as to seal one end and open the other end and vice versa, a coil of an electro-magnet mounted on the housing, an armature axially movable in the housing to engage and move, when energized, the plunger against the restoring force of a spring. A damping spring is also provided. The valve is simple in design, less expensive, smaller in dimensions, and is substantially trouble-free for long periods of time.

Abstract: A refrigeration system including a first evaporator having a capillary type expansion device controlling the flow of refrigerant thereto and a second evaporator having a thermal expansion valve for controlling the flow of refrigerant thereto. The system further includes a refrigerant compressor for discharging high pressure refrigerant vapor and a refrigerant condenser for receiving the high pressure refrigerant vapor and for converting the vaporous refrigerant to a relatively high pressure mixture of liquid and vaporous refrigerant. The system further includes a separator for receiving the relatively high pressure mixture from the condenser and for separating a substantial portion of the liquid refrigerant from the vapor liquid mixture. A first conduit is connected to the separator for delivering the separated liquid refrigerant to the thermal expansion valve and a second conduit is provided for delivering the remainder of the vapor liquid mixture to the capillary type expansion device.

Abstract: A cooler for a freezing chamber of a cooling apparatus having a low temperature portion cooling region and a very low temperature portion cooling region. The frost is concentrated on the very low temperature portion, and there is no frost adhesion to the low temperature portion.

Abstract: Two evaporators are alternately fed with freon with subsequent timed reversal of the air flow thereover so as to eliminate trouble resulting from coil-icing and to further increase the heat recovery of building heating systems. A faucet pipe having opposite apertures is rotatably mounted around the evaporators to reverse the air flow thereover.

Abstract: A dual source heat pump system is disclosed for automatically selecting in either the heating or cooling mode of operation that source which will most efficiently meet the heating or cooling demand required of the system. The heat pump system includes valves located so that the heat exchanger associated with the source not selected can be isolated from the remainder of the system and temporary pumping cycles initiated at the conclusion of a heating or cooling cycle for pumping all the refrigerant into the indoor space exchanger coil. Virtually all the refrigerant charge is thereby maintained in the active portions of the heat pump system while the inactive portion is completely isolated.

Abstract: An improved portable refrigeration apparatus for cooling a limb of a patient or the like, and which includes at least one flexible pad adapted to be wrapped around a bodily limb and which incorporates flexible tubing serving as an evaporator. A separate auxiliary evaporator is positioned downstream of the pad to insure that all of the refrigerant is evaporated before returning to the compressor. Also, there is provided a temperature control system for the pad which includes a by-pass conduit which by-passes the pad, and a temperature controlled valve for selectively opening and closing the by-pass conduit, and so that the refrigerant will flow concurrently through the by-pass conduit and the pad when the valve is opened.

Abstract: A vapor compression refrigeration system which has a compressor, a condenser, a flash economizer and an evaporator to form a primary refrigerant loop and a second compressor and an economizer-condenser which partially form a secondary refrigerant loop. Gaseous refrigerant from the flash economizer is recompressed in the second compressor and thereafter recondensed by the economizer-condenser. The recondensed refrigerant is then flashed in the flash economizer further cooling the liquid refrigerant therein.

Abstract: A vapor compression refrigeration system which has a compressor, a condenser, a low temperature flash economizer, a high temperature flash economizer and a chiller connected to form a primary refrigerant loop and a second compressor and economizer condenser connected to partially form a secondary refrigerant loop. Gaseous refrigerant from the high temperature flash economizer is condensed by the economizer condenser and then flashed in the low temperature flash economizer. The gaseous refrigerant from the low temperature flash economizer is recompressed by the second compressor and thereafter recondensed by the economizer condenser. The recondensed refrigerant is then circulated to the low temperature flash economizer together with the remaining liquid refrigerant from the condenser.

Abstract: Two evaporators are alternately fed with freon with subsequent timed reversal of the air flow thereabout so as to eliminate trouble resulting from coil-icing and to further increase the heat recovery of building heating systems.

Abstract: A vapor generating and recovering apparatus for separating one component from a second component of a liquid solution and recovering the first component including at least one chamber for generating vapor from the liquid solution and recovering the vapor in a liquid form, the vapor generating portion of the chamber being in heat emitting relation with a heat emitting means and the vapor recovering portion chamber being in heat absorbing relation with a heat absorbing means. A preferred system for providing heat to the vapor generating portion of the chamber and removing heat from the vapor recovering portion of the chamber is a refrigerating system which includes condensing coils and evaporating coils in heat transfer relation with the vapor generating and vapor recovery chamber.

Abstract: A refrigeration system including at least one compressor, a condenser for receiving hot gaseous refrigerant from the compressor and condensing same, a discharge line for supplying hot gaseous refrigerant from the compressor to the condenser, a plurality of expansion valves associated with a plurality of evaporators, a liquid line for passing condensed refrigerant from the output of the condenser to the expansion valves and evaporators, a return line extending from the evaporators to the input of the compressor to supply refrigerant thereto, a receiver for holding a reservoir of refrigerant, a bypass line connecting the receiver to the liquid line, a hot gas defrost means for selectively passing hot gaseous refrigerant through one or more of the evaporators for defrost and a balancing line operable during defrost responsive to a pressure within the receiver greater than within the discharge line to provide fluid flow communication therebetween to equalize refrigerant pressure between the receiver and discharge

Abstract: A vapor generating and recovering apparatus for separating one component from a second component of a liquid solution and recovering the first component including at least one chamber for generating vapor from the liquid solution and recovering the vapor in a liquid form, the vapor generating portion of the chamber being in heat emitting relation with a heat emitting means and the vapor recovering portion chamber being in heat absorbing relation with a heat absorbing means. A preferred system for providing heat to the vapor generating portion of the chamber and removing heat from the vapor recovering portion of the chamber is a refrigerating system which includes condensing coils and evaporating coils in heat transfer relation with the vapor generating and vapor recovery chamber.

Abstract: In a refrigeration system for a substantially enclosed space and including a compressor, a condenser, an evaporator, conduit means connecting the said compressor, condenser and evaporator to form a cooling circuit, and a hot gas by-pass conduit between the compressor and the evaporator, the improvement which comprises means provided in the system for apportioning flow of gas between the cooling circuit and the by-pass conduit so that, during a temperature controlling phase of refrigeration, the gas flows both to the condenser and to the by-pass conduit and the apportioning of flow can cause either net heating or net cooling of the enclosed space.