Abstract: A heat exchanger such as a condenser for use in an automotive air-conditioner includes a core unit having a plurality of laminated tubes and fins. Brackets for mounting the heat exchanger on a vehicle are connected to U-shaped side plate disposed on an outside of the core unit. After components constituting the core unit including the side plate are all connected to one another by brazing, the brackets are connected to the side plate via mounting members made of rubber by staking sidewalls of the U-shaped side plate. Since the brackets are connected to the heat exchanger by staking after the heat exchanger is completed, the heat exchanger is easily brazed and the number and positions of the brackets on the side plate can be arbitrarily selected.

Abstract: A refrigerant cycle system includes a condenser having a condensation portion for condensing refrigerant discharged from a compressor, and a receiver for separating refrigerant from the condensation portion into gas refrigerant and liquid refrigerant, and for storing the liquid refrigerant. In this system, refrigerant from the condensation portion flows into the receiver through a first communication hole, and liquid refrigerant in the receiver is discharged through a second communication hole in which a pressure loss is generated. Further, gas refrigerant at an upper side in the receiver is discharged to a downstream side of the second communication hole through a gas bypass pipe.

Abstract: In a heat exchanger, a bracket is fixed to the side plate only by fastening, after an assembly including a core portion and the side plate is bonded together in a furnace. Therefore, the bracket can be readily fixed to the side plate without using an additional connection member such as a bolt. Accordingly, the core portion can be made relatively larger while it can prevent an outer dimension of the heater core from being enlarged. Further, one of the side plate and the bracket has a protrusion, and the other one of the side plate and the bracket has a hole being engaged with the protrusion. Therefore, the bracket can be further tightly fixed to the side plate without brazing.

Abstract: A heat exchanger such as a condenser for use in an automotive air-conditioner includes a core unit having a plurality of laminated tubes and fins. Brackets for mounting the heat exchanger on a vehicle are connected to U-shaped side plate disposed on an outside of the core unit. After components constituting the core unit including the side plate are all connected to one another by brazing, the brackets are connected to the side plate via mounting members made of rubber by staking sidewalls of the U-shaped side plate. Since the brackets are connected to the heat exchanger by staking after the heat exchanger is completed, the heat exchanger is easily brazed and the number and positions of the brackets on the side plate can be arbitrarily selected.

Abstract: A refrigerant cycle system includes a condenser having a condensation portion for condensing refrigerant discharged from a compressor, and a receiver for separating refrigerant from the condensation portion into gas refrigerant and liquid refrigerant, and for storing the liquid refrigerant. In this system, refrigerant from the condensation portion flows into the receiver through a first communication hole, and liquid refrigerant in the receiver is discharged through a second communication hole in which a pressure loss is generated. Further, gas refrigerant at an upper side in the receiver is discharged to a downstream side of the second communication hole through a gas bypass pipe.

Abstract: A tube inside passage height (Tr) is set within a range of 0.35-0.8 mm. Thereby, sum of radiation performance reduction due to pressure loss inside tube and radiation performance reduction due to air flow resistance is reduced, thereby attaining high radiation performance. Especially, when the tube inside passage height (Tr) is set within a range of 0.5-0.7 mm, the radiation performance is further improved.

Abstract: A refrigerant condenser is set so that, if its condensation distance is L, the equivalent diameter of a tube having a linearly configured passage for the purpose of heat exchange is de (each dimension being in units of mm), and the number of times the direction change of the linearly configured passage for the purpose of heat exchange change is N, with de.ltoreq.1.15 and the relationship L=(N+1)W=400+1,180 de to 700+1,180 de satisfied, a high heat exchange efficiency is achieved. In this refrigerant condenser, it is possible to use a single long winding tube.

Abstract: A refrigerant condenser set so that a condensation distance L (mm) of the condenser falls between 400+1180 de and 700+1180 de where de (mm) is the equivalent diameter of the tubes forming the core. By setting the condensation distance L in this way, the heat exchange rate becomes higher and it is possible to determine the number of turns required for the distance L.

Abstract: A refrigerant condenser is set so that, if its condensation distance is L, the equivalent diameter of a tube having a linearly configured passage for the purpose of heat exchange is de (each dimension being in units of mm), and the number of times the direction change of the linearly configured passage for the purpose of heat exchange change is N, with de.ltoreq.1.15 and the relationship L=(N+1)W=400+1,180 de to 700+1,180 de satisfied, a high heat exchange efficiency is achieved. In this refrigerant condenser, it is possible to use a single long winding tube.

Abstract: A refrigerant condenser is set so that, if its condensation distance is L, the equivalent diameter of a tube having a linearly configured passage for the purpose of heat exchange is de (each dimension being in units of mm), and the number of times the direction change of the linearly configured passage for the purpose of heat exchange change is N, with de.ltoreq.1.15 and the relationship L=(N+1)W=400+1,180 de to 700+1,180 de satisfied, a high heat exchange efficiency is achieved. In this refrigerant condenser, it is possible to use a single long winding tube.

Abstract: A laminate-type evaporator is disclosed which is formed of a main heat exchanger, an auxiliary heat exchanger, and a connecting member integrally brazed, such that brazing performance between the auxiliary heat exchanger and the connecting member is enhanced and moisture does not remain between the auxiliary heat exchanger and the connecting member, while setting brazing temperature to a temperature which does not melt the main heat exchanger and also while shortening brazing time. Convexities are formed on a block joint, and a width of a brazed portion connecting these convexities and an end plate is made to be 5 mm or less. Additionally, a dimension of a clearance between the end plate and block joint is made to be 0.5 mm or more.

Abstract: A heat exchanger is formed by the stacked lamination of a plurality of core elements formed from a single material. The core elements are substantially U-shaped with an upper surface having fins for allowing a first heat medium to pass therethrough, side plates extending substantially perpendicular to the ends of the upper surface for joining adjacent core elements, and tube portions formed between the side plates of joined adjacent core elements. The core elements are stacked and joined to thereby form a finned passageway allowing a first heat medium to pass therethrough in a first direction, and a tube passageway allowing a second heat medium to pass therethrough in a second direction which is perpendicular to the first direction. The design allows for adjustment of the cross-sectional area of the tube passageway without causing an increase in the pressure caused by the finned passageway.

Abstract: An inner half cylinder and an outer half cylinder are brazed to each other to form a cylindrical header tank. Both ends of tubes are connected to the inner half cylinder. An opening of the outer half cylinder is communicated with an opening of a joint pipe. A tongue portion which is provided on the periphery of the opening of the outer half cylinder is inserted and curled in the opening of the joint pipe so as to fix the joint pipe on the outer half cylinder firmly.

Abstract: A header has a tank member having a transverse cross-section of a circular arc shape, and a tube attachment member having a transverse cross-section flatter than the above-mentioned circular arc shape as a whole, are opposed and joined. The tube attachment member has identical curvature portions constituted with an inner diameter R2 which is the same as the inner diameter R2 of the tank member at both sides to be joined to the tank member, and has a large curvature portion constituted with an inner diameter R1 which is larger than the inner diameter R2 of the tank member at an intermediate portion interposed between the identical curvature portions. A connecting position P between the identical curvature portion and the large curvature portion is inside from both edges of a tube.