Abstract: A heat exchanger is described and which includes an exterior container having an internal cavity; a refrigerant distribution tube is positioned within the internal cavity and which is further coupled in fluid receiving relation relative to a first source of refrigerant; and a multiplicity of closely nested refrigerant tubes are located within the internal cavity and are further disposed in a closely spaced, radially outwardly oriented positions relative to the refrigerant distribution tube, and which additionally have a predetermined and similar length dimension, and individually form helical coils which have a given and similar length dimension, and a variable pitch, and which are further coupled to a second source of a refrigerant.

Abstract: An air hood is described and which is arranged so as to be mounted on a refrigeration device of conventional design; the air hood is moveable between a first position where the air hood is collapsed and is placed in juxtaposed, covering relation relative to an air intake side of the refrigeration device, and a second position where the air hood is placed into an operational position which places it laterally outwardly relative to the air intake side of the refrigeration device.

Abstract: A heat exchanger is described and which includes an exterior container having an internal cavity; a refrigerant distribution tube is positioned within the internal cavity and which is further coupled in fluid receiving relation relative to a first source of refrigerant; and a multiplicity of closely nested refrigerant tubes are located within the internal cavity and are further disposed in a closely spaced, radially outwardly oriented positions relative to the refrigerant distribution tube, and which additionally have a predetermined and similar length dimension, and individually form helical coils which have a given and similar length dimension, and a variable pitch, and which are further coupled to a second source of a refrigerant.

Abstract: A heat exchanger is described and which includes a heat exchanger portion defining a multiplicity of internal passageways, and wherein at least one of the passageways is defined in part by a wicking structure; and a source of ammonia refrigerant which is supplied to the internal passageways of the heat exchanger portion, and wherein substantial equal amounts of liquid refrigerant are supplied to each of the passageways defined by the heat exchanger portion.

Abstract: An air hood is described and which is arranged so as to be mounted on a refrigeration device of conventional design; the air hood is moveable between a first position where the air hood is collapsed and is placed in juxtaposed, covering relation relative to an air intake side of the refrigeration device, and a second position where the air hood is placed into an operational position which places it laterally outwardly relative to the air intake side of the refrigeration device.

Abstract: A heat exchanger is described and which includes a heat exchanger portion defining a multiplicity of internal passageways, and wherein at least one of the passageways is defined in part by a wicking structure; and a source of ammonia refrigerant which is supplied to the internal passageways of the heat exchanger portion, and wherein substantial equal amounts of liquid refrigerant are supplied to each of the passageways defined by the heat exchanger portion.

Abstract: A heat exchanger is described and which includes a heat exchanger portion defining a multiplicity of internal passageways, and wherein at least one of the passageways is defined in part by a wicking structure; a refrigerant distributor coupled in fluid flowing relation relative to the defined passageways of the heat exchanger portion; and a source of ammonia refrigerant which is supplied to the internal passageways of the heat exchanger portion, and wherein substantial equal amounts of liquid refrigerant are supplied to each of the passageways defined by the heat exchanger portion.

Abstract: A refrigerant distributor is described and which includes a tank defining an internal cavity for receiving a source of refrigerant; an inlet conduit for delivering the source of the refrigerant to the internal cavity of the tank; a contaminant collection container coupled in fluid receiving relation relative to the internal cavity of the tank and in disposal fluid receiving relation relative to the inlet conduit; and a plurality of refrigerant distributor conduits coupled in fluid flowing relation relative to the internal cavity of the tank and which have a multiplicity of apertures having variable diametral dimensions and which facilitate a variable flow of the source of refrigerant out through the refrigerant distributor conduits as the volume of the refrigerant in the tank increases.

Abstract: A heat exchanger and method for defrosting a heat exchanger is disclosed and which includes a heat exchanger having a fluid receiving conduit, and at least one space which is defined, at least in part, by the fluid receiving conduit, an expandable and contractible heating element which is received within the space, and which is located in heat transmitting relation relative to the fluid receiving conduit, and a biasing member mounted on the heat exchanger and the heating element and which longitudinally, and resiliently restrains the movement of the heating element relative to the heat exchanger during the expansion and contraction of the heating element relative to the heat exchanger.

Abstract: A heat exchanger system is described and which includes a metal tubular heat exchanger; a fluid distributor conduit fabricated from a metal dissimilar to that of the heat exchanger, and wherein the fluid distributor conduit is connected in fluid flowing relation relative to the metal tubular heat exchanger; and a fluid distributor made of a metal that is similar to that of the fluid distributor conduit, and which is connected in fluid flowing relation relative to the fluid distributor.

Abstract: A coupler for joining an aluminum conduit to a steel or stainless steel conduit and which includes a main body which is formed from a first layer of aluminum and a layer of steel or an iron-chromium alloy which are explosively welded together, and wherein the main body has a first aluminum surface, and an opposite, second steel or iron-chromium alloy surface, and wherein the aluminum conduit is welded to the first aluminum surface, and the steel or stainless steel conduit is welded to the second steel or iron-chromium surface.