Abstract: An air-conditioning and refrigerating system has a single vane-type rotary compressor, a single condenser, an air-conditioning evaporator and a refrigerating evaporator parallel to the air-conditioning evaporator. The compressor has main and auxiliary suction ports connected through air conditioning and refrigerating refrigerant return passages to the air-conditioning evaporator and to the refrigerating evaporator, respectively. The compressor is constructed such that the refrigerating refrigerant returned through the auxiliary suction port into a working chamber is mixed in the working chamber with the air-conditioning refrigerant returned through the main suction port into the working chamber before the refrigerating refrigerant is compressed in the working chamber.

Abstract: An air-conditioning and refrigerating system has a single compressor, a single condenser, an air-conditioning evaporator and a refrigerating evaporator parallel to the air-conditioning evaporator. The compressor has main and auxiliary suction ports connected through air conditioning and refrigerating refrigerant return passages to the air-conditioning evaporator and to the refrigerating evaporator, respectively. The compressor is constructed such that the refrigerating refrigerant returned through the auxiliary suction port into a working chamber is mixed in the working chamber with the air-conditioning refrigerant returned through the main suction port into the working chamber before the refrigerating refrigerant is compressed in the working chamber.

Abstract: A refrigerator for a vehicle has a coldness accumulator formed by a container with water therein and an evaporator selectively connectable to a refrigeration cycle of an air conditioner of the vehicle. The coldness accumulator is disposed in a refrigeration space defined in a heat-insulating housing having an openable door mounted thereon. The water is cooled to freezing temperature during vehicle operation to accumulate coldness which is utilized to keep the refrigeration space at a low temperature when the evaporator is disconnected from the refrigeration cycle or when the refrigeration cycle is not operated.

Abstract: When a fluid is jetted from an orifice having a small diameter into an ample space having a much greater cross-sectional area than the orifice, as in the case of a refrigerant jetted from a restriction or orifice into a refrigerant pipe of a refrigeration system, jet noise of high frequency is generated in the region around the orifice. In order to suppress the generation of this jet noise, the present invention provides a silencer which includes a casing, an orifice of a small diameter arranged in the casing for jetting a refrigerant into the casing and an obstruction disposed in the casing at a position within a distance which is 5 times as large as the diameter of the orifice. The obstruction can have various forms such as bar-like form, disc-like form and so forth and can be made from various materials such as rubbers, plastics and metals. The obstruction disposed at such a position cause a change of pattern of the fluid flow to effectively suppress the generation of noise.

Abstract: A refrigeration system for use in air conditioner for automobiles. The refrigeration system has a pressure reducing device disposed between a condenser and an evaporator and adapted for permitting the refrigerant to make an adiabatic expansion therethrough. The pressure reducing device includes a flow restricting and resisting means such as an orifice and a flow resisting means disposed at the upstream side of the flow restricting and resisting means. The flow resisting means are adapted to impart a resistance to the flow of refrigerant and may be constituted by a capillary tube or a constant-pressure-differential valve. Because of the resistance imparted by the flow resisting means, the dryness factor of the refrigerant at the inlet to the flow restricting and resisting means is maintained between 0 and 0.1, so that the flow rate of the refrigerant is largely affected by the characteristic of the flow restricting and resisting means.