Abstract: Fixed to the peripheral wall of a header 2 of a unit-type heat exchanger 1 is a receiver connecting block 6 having channels 31, 32 for causing the interior of the header 2 to communicate with the interior of a liquid receiver 7 therethrough. The block 6 and the liquid receiver 7 have respective fixing portions 32, 36 and respective contact faces 22a, 36a each provided on the fixing portion. The outer peripheral surfaces of the fixing portions 22, 36 have respective contours of the same shape and the same size. The liquid receiver 7 is fixed to the block 6 with the contact faces 22a, 36a of the fixing portions 22, 36 in intimate contact with each other. A tubular seal member 42 having rubber elasticity is liquid-tightly fitted around the fixing portions 22, 36. The seal member 42 has an inner shape smaller than the contours of the outer peripheral surfaces of the fixing portions 22, 36 and is fitted as elastically deformed around the fixing portions 22, 36.

Abstract: Fixed to the peripheral wall of a header 2 of a unit-type heat exchanger 1 is a receiver connecting block 6 having channels 31, 32 for causing the interior of the header 2 to communicate with the interior of a liquid receiver 7 therethrough. The block 6 and the liquid receiver 7 have respective fixing portions 32, 36 and respective contact faces 22a, 36a each provided on the fixing portion. The outer peripheral surfaces of the fixing portions 22, 36 have respective contours of the same shape and the same size. The liquid receiver 7 is fixed to the block 6 with the contact faces 22a, 36a of the fixing portions 22, 36 in intimate contact with each other. A tubular seal member 42 having rubber elasticity is liquid-tightly fitted around the fixing portions 22, 36. The seal member 42 has an inner shape smaller than the contours of the outer peripheral surfaces of the fixing portions 22, 36 and is fitted as elastically deformed around the fixing portions 22, 36.

Abstract: A duplex heat exchanger of the so-called stacked type has in principle a plurality of plate-shaped tubular elements (1) which are stacked side by side or one on another and a plurality of fins (2) each intervening between the adjacent tubular elements. Each tubular element is composed of flat tubular segments (3a, 4a) separated from each other and each communicating with one of bulged header portions (3b, 4b) of the tubular element, so that flow paths (3, 4) for heat exchanging media are formed through each tubular element. Two or more unit heat exchangers (X, Y) are defined integral with each other within the duplex heat exchanger, since the adjacent tubular elements (1) communicate with each other through the header portions (3b, 4b).

Abstract: A condenser particularly for use in automobile air conditioning system, the condenser including a pair of headers having their inner spaces divided by partitions so as to form a cooling medium flow path in a zigzag patterns including an inlet side group of paths and an outlet side group of paths, side group of paths is 30 to 60% of that of the inlet side group of paths.

Abstract: A condenser for use in air conditioning systems, including a core and headers, the core comprising tubes and corrugated fins sandwiched between the tubes, wherein:width of each tube: 6.0 to 20 mmheight of each tube: 1.5 to 7.0 mmheight of each coolingmedium flow path: 1.0 mm or moreheight of each fin: 6.0 to 16 mmfin pitch: 1.6 to 4.

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly soldered therein.

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly soldered therein.

Abstract: A condenser apparatus includes a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; and fins provided in the air paths between one tube and the next. Each of the headers is made of a cylindrical pipe of aluminum. At least one of the headers is internally divided by a partition into at least two groups of coolant passageways, thus enabling the flow of coolant to make at least one U-turn in the header. The partition extends into the header through a slit in the header. Each of the tubular elements is made of a flat hollow tube of aluminum. The opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly secured.

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly soldered therein.

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers os that they are liquid-tightly soldered therein.

Abstract: A heat exchanger of the plate fin type having first fluid channels and second fluid channels arranged alternately and each separated from the adjacent channel by a flat metal plate. At least one of the first fluid channel and the second fluid channel is formed by a pair of adjacent flat metal plates and a spacer interposed between the flat plates. The spacer comprises a pair of side walls each joined to and interconnecting a pair of opposed edges of the two flat plates at each side thereof, a connecting wall interconnecting the two side walls, and fins provided on the connecting wall at an angle therewith and joined at their forward ends to the flat plate, the fins extending in parallel with the direction of flow of fluid through the fluid channel. The heat exchanger is fabricated by arranging plate plates, spacers, fins and spacer bars in layers and joining the parts together by brazing at the same time.

Abstract: A condenser adapted for use in the car cooling system, the condenser comprising a pair of headers provided in parallel with each other; a plurality of tubular elements whose opposite ends are connected to the headers; fins provided in the air paths between one tube and the next; wherein each of the headers is made of a cylindrical pipe of aluminum; wherein each of the tubular elements is made of a flat hollow tube of aluminum by extrusion; and wherein the opposite ends of the tubular elements are inserted into slits produced in the headers so that they are liquid-tightly soldered therein.The question raised in reexamination request Nos. 90/003,544, filed Aug. 24, 1994, 90/003662, filed Dec. 16, 1994, 90/003796, filed Apr. 19, 1995, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. as provided in 37 CFR 1.570(e).