Abstract: A temperature controlling apparatus is provided for use in systems such as a motor vehicle air conditioner. In the temperature controlling apparatus, a cycling clutch and a re-heated air mixing system are selectively used in accordance with the environmental condition. The cycling clutch system temperature control is effected in summer season to control an operating period of time of a compressor, and the re-heated air mixing system temperature control is effected in spring or autumn season to dehumidify the air and in winter season by means of an air mixing door after stopping the compressor thereby controlling an amount of the intake air which is to be re-heated.

Abstract: An evaporator including a side plate formed with a number of openings each having rigidly secured therein the upper end portion of one of a number of U-shaped refrigerant tubes, a cover plate attached to the upper surface of the side plate and formed, by recessing its inner surface, with a plurality of bend sections each intercommunicating the upper end portions of the two tubes of the adjacent U-shaped refrigerant tubes forming a set, a distributor section for supplying a suitable refrigerant to refrigerant passages provided by the U-shaped tubes and the bend sections, a manifold section for collecting the refrigerant from the refrigerant passages and discharging same therefrom, and an expansion valve section extending between the distributor section and the manifold section in a manner to intercommunicate the two sections, and an expansion valve assembly mounted in the expansion valve section.

Abstract: An evaporator comprising a tube plate having a number of through holes to which the upper ends of a plurality of U-tubes are fixed, a first cover plate secured to the tube plate and having a plurality of through holes aligned to some through holes of the tube plate, a second cover plate secured to the first cover plate and defining in cooperation therewith passages for introducing and distributing refrigerant, and an expansion valve assembly installed through the first and second cover plates and having a constriction formed therein. The first cover plate defines connecting passages and a collecting passage for the refrigerant in cooperation with the tube plate.