Abstract: In an apparatus for use for servicing air conditioning equipment, particularly in an automobile, the apparatus includes a container or cannister having a flow tube centrally located within it, extending from its upper closure member to within proximity of its base, with the upper section of the container being removable, and having a filter located therein. During usage, the container is useful for draining the refrigerant and lubricant from an automobile air conditioning system, with the refrigerant filtering through the filter, while the lubricant is collected within the container, and can be reused. The container also includes a magnetic member associated with the base to assure stable attachment of the apparatus to any metallic supporting surface during usage.

Abstract: A refrigeration purging system for the removal of non-condensible gases such as air and condensible contaminants such as water is disclosed. A portion of the refrigerant in the refrigeration system is placed in a first purge chamber which condenses the refrigerant and condensible contaminants such as water leaving non-condensibles such as air and a small portion of the refrigerant at the top of the chamber. The non-condensibles and remaining refrigerant is extracted from the first chamber pumped to a higher pressure and passed to a second purged chamber wherein the remaining refrigerant is condensed and returned to the first purged chamber. The non-condensible gases remaining are released to the atmosphere. The condensible contaminants are extracted from the first purged chamber and the condensed refrigerant is returned to the refrigeration system.

Abstract: A purge system for use in a refrigeration system utilizing more than one condenser, each of which operates at different pressures. The purge system includes a purge chamber having a cooling coil connected to the evaporator and adapted to condense refrigerant vapor. The purge chamber is connected to a main purge refrigerant line which includes a pressure reducing device. Either condenser in the refrigeration system is provided with a secondary purge refrigerant line connected to the main purge refrigerant line and having a one-way valve to prevent refrigerant flow from one condenser to another condenser. A pump is mounted in the system to remove the non-condensibles from the purge system. The pump is operatively connected to a pressure switch arranged between two sampling pressure lines, one of which is extending to the purge chamber and another one is extending to the main purge refrigerant line at a point ahead of the pressure reducing device.

Abstract: A system for use with a freezing liquid (refrigerant) spray refrigerator for foods, in order to purify the refrigerant contaminated with solid filth such as a scale of a fish, dust or the like. Removal of such solid filth from the refrigerant for purification and re-use of the purified refrigerant can be carried out by an arrangement, wherein the refrigerant once sprayed onto the foods for refrigeration and contaminated with solid filth such as a scale of a fish, dust or the like will be conveyed to a filter for separating the solid filth from the refrigerant contaminated with the solid filth; the refrigerant so treated will then be conveyed to a heater in order to heat the refrigerant thereby to flocculate a fat, blood or the like of the foods still remaining in the refrigerant; the refrigerant will further be conveyed to a filter to remove the coagulum; and the refrigerant so purified will finally be conveyed to a reservoir tank for re-use.

Abstract: An air conditioning unit including a compressor-expander employing a vaned rotor defining enclosed compartments which become smaller in the compressor and larger in the expander as the shaft rotates, for positive compression and expansion. A primary heat exchanger having an associated separator-sump is connected between the compressor outlet port and the expander inlet port for dissipation of heat. A secondary heat exchanger is connected between the expander outlet port and compressor inlet port for absorption of heat and to complete a closed loop. The loop is charged with a main refrigerant in the form of a non-condensing gas, such as air, plus an auxiliary refrigerant mixed with oil, the auxiliary refrigerant being chosen (a) to have appreciable heat of vaporization and (b) to be capable of liquifaction at the pressure and temperature existing in the primary heat exchanger and evaporation at the pressure and temperature existing in the secondary heat exchanger.

Abstract: A refrigeration purge system comprising a purge drum coupled to receive purge gas from a primary refrigeration system. The purge gas includes a primary refrigerant component and a noncondensable component. The purge system also includes a secondary refrigeration system which uses a secondary refrigerant. The secondary refrigerant and the purge gas are passed in heat exchange relationship in the purge drum to condense the primary refrigerant component of the purge gas. The condensed primary refrigerant is then returned to the primary refrigeration system, and the noncondensable component is expelled from the purge drum.

Abstract: Material is cooled by direct contact with CO.sub.2, and the CO.sub.2 vapor is recovered. A coolant reservoir is created in a holding tank wherein CO.sub.2 vapor, CO.sub.2 liquid and solid CO.sub.2 exist in equilibrium in the form of slush plus vapor. Liquid CO.sub.2 is supplied to a cooling chamber to cool the material by direct contact, creating contaminated CO.sub.2 vapor. The contaminated CO.sub.2 vapor is removed and directed to the coolant reservoir to condense the CO.sub.2 vapor and any contaminants which liquefy at temperatures above -69.degree. F. by melting solid CO.sub.2. Clean CO.sub.2 vapor and any noncondensables are withdrawn from the holding tank and the withdrawn CO.sub.2 vapor is reliquefied and returned to the CO.sub.2 storage vessel. Condensable contaminants are periodically removed from the holding tank by heating to a temperature where they can be blown out the bottom.

Abstract: A refrigerant dehydrator, in combination with a refrigeration system of the type including a compressor, a condenser, a refrigerant expansion device, and an evaporator, incorporating a body member, of generally U-shaped configuation, surrounding a refrigerant conducting bore operationally interposed between the refrigerant expansion device and the evaporator. A sump member is connected to a lower portion of the body member and extends downward therefrom. The bore of the body member and the bore of the sump member communicate through an orifice defined by a wall of the body member. A drain valve is sealably connected to the lower end of the sump member.

Abstract: A hydrogen gas extractor adapted for use with a refrigerating machine in which a high vacuum is maintained and hydrogen gas is evolved largely by corrosive reactions of a solution, comprising a case, hydrogen gas exhaust means fabricated of palladium or its alloy and gas tightly secured through the walls of said case, a connecting pipe communicated at one end with said machine and open at the other end in said case, a mass of metal contained in said case, said metal being capable of occluding hydrogen gas at ordinary temperature and releasing the same at elevated temperature, and heater means for heating both said hydrogen gas exhaust means and said metal.

Abstract: A purge arrangement for absorption refrigeration systems using a solution of lithium bromide as an absorbent and water as a refrigerant, and a heat transfer additive, such as octyl alcohol being added to and mixing with the lithium bromide solution. The purge arrangement includes means for automatically removing noncondensible gases or vapor from the system, said means including a vacuum pump connected to a receiver to draw noncondensible gases therefrom; automatic electrical control means for said vacuum pump; and an additive overflow conduit to prevent additive collecting in the storage receiver and to assure additive return flow into the solution conduit.

Abstract: A series of air-cooled, vertical condensing tubes extend upwardly from a horizontal header to which refrigerant vapor is supplied. The vapor flows upwardly from the header through the condensing tubes and forms, on the tubes' internal surfaces, condensate which then flows downwardly into the header and eventually through the header's outlet. With this arrangement, the customary top header is not needed.