Abstract: A heat exchanger comprising a tube, a fin, and a header pipe, wherein the tube contains, in mass %, 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance of Al and unavoidable impurities, and is coated with a coating of brazing composition containing 1.0 to 5.0 g/m2 of Si powder, 4.0 to 10.0 g/m2 of KZnF3, and 0.5 to 3.0 g/m2 of binder; the fin contains, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, one or two or more selected from 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance of Al and unavoidable impurities; and the header pipe comprises a core material, outer sacrificial corrosion protection material, and an inner brazing material.

Abstract: In a heat exchanger with a receiver tank, a coupling member and an adapter member constitute a connecting member that connects the receiver tank and the heat exchanger, where the connecting member has header connecting portions respectively connected with a concentrating part and a supercooling part of one of headers and the adapter member is connected with the connecting member and the receiver tank and is detachably attached to the receiver tank. The coupling member is assembled with a first divided member and a second divided member, where the first divided member is formed with header connecting portions to be connected with the second divided member.

Abstract: In a liquid tank structure of a heat exchanger, a liquid tank 4 is attached to a heat exchanger having a heat exchanger core defining a condensation part AC and an under cooling part BC, and a pair of headers 1 and 2 each having an inlet part R1, R2 connected with the condensation part AC and an outlet part R3, R4. The condensed refrigerant from the inlet part R2 flows in the liquid tank 4 through an inlet port 1a of an inlet-port side connecting pipe 4a connected with the inlet part R2 of one header 2 of the pair of header. The condensed refrigerant Q accumulated in a bottom portion of the liquid tank 4 is discharged to the outlet part R3 through an outlet port b1 of an outlet-port side connecting pipe 4b connected with the outlet part R3 at a position under an inlet port a1.

Abstract: A core structure includes a plurality of flat tubes and a plurality of corrugated inner fins. Each corrugated inner fin has top portions for being fixed to an inner surface of an upper wall portion of the tubes, bottom portions for being fixed to an inner surface of a lower wall portion thereof, and slanted portions for connecting the top portion with adjacent bottom portions thereof. The corrugated inner fin has first corrugations located at both end sides of the corrugated inner fin and second corrugations located between the first corrugations, where the first and the second corrugations has the top portion and the adjacent slanted portions and project from the bottom portions. The first corrugations are set to be smaller in a front-back directional length of the corrugated inner fin than a front-back directional length of the second corrugations.

Abstract: A vehicle heat exchanger includes heat exchangers overlapped with each other in an airflow direction. The heat exchangers include heat exchanger tubes arranged side by side with each other. The heat exchangers include outer fins interposed between neighboring heat exchanger tubes. The heat exchangers includes header pipes connecting and communicating with both ends of the heat exchanger tubes for heat-conducting media to circulate through the heat exchanger tubes and header pipes. The vehicle heat exchanger includes a reservoir in communication with one of the header pipes for reserving a heat-conducting medium. The reservoir is fixed to a header pipe of the largest one of the heat exchangers.

Abstract: A pipe connecting structure for a heat exchanger includes a header tank having a connect opening; a connector block having a passage configured to connect a pipe thereto; an adapter configured to connect the header tank and connector block to each other, the adapter having a first cylindrical part to be connected to the connect opening of the header tank, a second cylindrical part to be connected to the passage of the connector block, and a flange radially extending between the first and second cylindrical parts and being interposed between joint areas of the header tank and connector block; and a brazing material applied to a joint area of the flange to be joined to the header tank and a joint area of the flange to be joined to the connector block, so as to join the header tank and connector block together by brazing.

Abstract: A pipe of a header pipe is formed by combining two separated bodies separated along a longitudinal direction. The first separated body has a tube holding wall portion including an insertion hole inserting a flat tube thereto, and a pair of straight portions protruded from the tube holding wall portion in an approximately orthogonal direction and set along both sides in a width direction of the tube, and is formed in a C-shaped cross sectional shape.

Abstract: A heat exchanger includes a pair of tanks, and a heat exchanger core arranged therebetween and having tubes and fins. The tanks includes a tube plate connected with the tubes, a tank plate and at least two partition plates, where the tube plate, the tank plate and the partition plates are integrally fixed by blazing after the tube plate and the tank plate are temporarily assembled with each other to temporarily fix the partition plates between the tube plate and the tank plate. At least one of the tube plate and the tank plate is formed to have a misalignment preventing portion for preventing misalignment in a longitudinal direction of the tube plate and the tank plate between the temporarily assembled tube plate and tank plate.

Abstract: A condenser includes a pair of tanks, at least one of the tanks having a communicating hole, a condenser core arranged between the tanks and having fins and tubes fluidically connected with the tanks, and a connector having a connecting hole. A peripheral portion of the communicating hole is pressed into the connecting hole to form a burring portion which is caulked on an inner face forming the connecting hole so that the connector and the tank are temporarily fixed with each other, and facing portions of the tank and the connector are integrally fixed with each other by blazing. The inner surface of the connecting hole is provided with a holding groove to receive an inserted projecting portion formed on a part of an outer surface of the burring portion for holding the connector to the tank.

Abstract: A pipe connecting structure has a connector block fixed to a header tank of a heat exchanger and formed with a through-hole and a large diameter hole, a header side pipe having a base end portion connected with the header tank and a diameter expansion portion formed at its top portion and inserted into the large diameter hole of the connector block, and a vehicle side pipe having an end portion connected with a vehicle side device and a top portion inserted into the diameter expansion portion of the header side pipe through the through hole. The diameter expansion portion of the header pipe is brazed to the connector block, and the top portion of the vehicle side pipe is fixed to the connector block with a seal member between the connector block and the top portion of the vehicle side pipe.

Abstract: A pipe connecting structure for a heat exchanger includes a header tank having a connect opening; a connector block having a passage configured to connect a pipe thereto; an adapter configured to connect the header tank and connector block to each other, the adapter having a first cylindrical part to be connected to the connect opening of the header tank, a second cylindrical part to be connected to the passage of the connector block, and a flange radially extending between the first and second cylindrical parts and being interposed between joint areas of the header tank and connector block; and a brazing material applied to a joint area of the flange to be joined to the header tank and a joint area of the flange to be joined to the connector block, so as to join the header tank and connector block together by brazing.

Abstract: A pipe of a header pipe is formed by combining two separated bodies separated along a longitudinal direction. The first separated body has a tube holding wall portion including an insertion hole inserting a flat tube thereto, and a pair of straight portions protruded from the tube holding wall portion in an approximately orthogonal direction and set along both sides in a width direction of the tube, and is formed in a C-shaped cross sectional shape.

Abstract: A vehicle heat exchanger includes heat exchangers overlapped with each other in an airflow direction. The heat exchangers include heat exchanger tubes arranged side by side with each other. The heat exchangers include outer fins interposed between neighboring heat exchanger tubes. The heat exchangers includes header pipes connecting and communicating with both ends of the heat exchanger tubes for heat-conducting media to circulate through the heat exchanger tubes and header pipes. The vehicle heat exchanger includes a reservoir in communication with one of the header pipes for reserving a heat-conducting medium. The reservoir is fixed to a header pipe of the largest one of the heat exchangers.

Abstract: A plurality of cooling tubes (7) are connected and communicated with one another in multisteps in a vertical direction bridging a pair of header pipes (3). One of the header pipes (3) is provided with a liquid tank (9) for storing a cooling medium in a liquid phase which has been condensed and liquidized by cooling, and an auxiliary machinery part (23) is fitted to a peripheral wall face 9a of the liquid tank which serves as a large mounting face.

Abstract: The height of a bead opposing a joint where side edges of a plate are to be joined is set to be smaller than the height of a bead which does not oppose the joint by the thickness of the plate. Further, lands are provided between the beads and protrude from either the tube surface or the tube surface toward the inside of the main tube unit, and flow gaps are formed through which the heat-exchange medium flows over the lands.

Abstract: A core section (10) of a condenser is formed such that a plurality of heat exchanging tubes (4), while being vertically arranged in multiple stages, are disposed between a pair of header pipes (2, 3). A reservoir tank (6) is joined to the header pipe (3). The header pipe (3) is communicatively connected to the reservoir tank (6) by a refrigerant passage of a connection member (40). The connection member (40) connects a portion of the header pipe (3) which is out of a joining portion of the header pipe (3) where it is joined to the reservoir tank (6) to a portion of the reservoir tank (6) which is out of a joining portion of the reservoir tank (6) where it is joined to the header pipe (3).

Abstract: The height of a bead opposing a joint where side edges of a plate are to be joined is set to be smaller than the height of a bead which does not oppose the joint by the thickness of the plate. Further, lands are provided between the beads and protrude from either the tube surface or the tube surface toward the inside of the main tube unit, and flow gaps are formed through which the heat-exchange medium flows over the lands.

Abstract: The height of a bead opposing a joint where side edges of a plate are to be joined is set to be smaller than the height of a bead which does not oppose the joint by the thickness of the plate. Further, lands are provided between the beads and protrude from either the tube surface or the tube surface toward the inside of the main tube unit, and flow gaps are formed through which the heat-exchange medium flows over the lands.