Abstract: A heated accumulator for a refrigeration system includes a cylindrical tank closed by upper and lower tank caps. The tank is divided into upper and lower chambers by a plate disposed near the upper tank cap, with the lower chamber defining a sump. The plate includes a central opening surrounded by smaller openings. An outlet U-tube has a first end disposed within the central opening of the plate, a second end which extends through the upper tank cap, and a central portion which extends into the sump. A refrigerant inlet tube includes swirl ports which direct refrigerant into a vortex against the inner surface of an upper portion of the tank. Heat is applied to this same upper tank portion, introducing heat directly into the swirling liquid refrigerant. Refrigerant vaporized by the heat rises into the upper tank chamber where it is drawn by compressor suction into the outlet U-tube.

Abstract: An air conditioning unit having a power pack which includes an internal combustion engine coupled to a refrigerant compressor on a metallic support tray, with said air conditioning unit being suitable for mounting on the roof of a building via support curbing, notwithstanding the noise and vibration produced by the internal combustion engine. The air conditioning unit includes a metallic main frame, to which a metallic power pack support frame is fixed. The power pack support frame includes members which are continuously supported by the main frame via a low frequency damping material, such as cork, and members which extend between the supported members, but which are otherwise unsupported, to enable the unsupported members to function as leaf springs. The support tray of the power pack is mounted to the unsupported members of the power pack support frame via a plurality of isolation mounts.