Abstract: A heat exchanger is provided and includes a plurality of tubes with refrigerant passages inside of them and a pair of header tanks to which end parts of the tubes are brazed. Brazing materials, which are used for brazing to the header tanks, are arranged at the outer circumferential surfaces of the tubes. Base materials of the metal sheet members which form the header tanks are exposed at the inner circumferential surfaces and outer circumferential surfaces of the header tanks.

Abstract: A tube used in a heat exchanger, wherein a tube body includes a curved end portion, a pair of parallel portions, a pair of inclination portions, and a fixed portion in which a long end part extending from one of the pair of inclination portions is bent to hold therebetween a short end part extending from the other of the pair of inclination portions, and the tube is a pipe member having a flattened shape in cross-section. Poor brazing is reduced by making the inclination angle of at least part of the other inclination portion with respect to the flat plate portion larger than that of the one inclination portion.

Abstract: A heat exchanger which employs porous tubes wherein tube melting at the time of attaching the porous tubes to the header tanks is prevented, the heat exchanger provided with an entry header tank which has an inflow port, an exit header tank which has an outflow port, and a plurality of tubes having passages for refrigerant flowing between the entry header tank and the exit header tank, the tubes being porous tubes which are formed by bending or rolling from flat sheets and being brazed at the two end parts to the entry header tank and exit header tank, wherein the outer surfaces of the tubes are provided with brazing materials which are used for brazing to the entry header tank and exit header tank and wherein the inner surface and outer surface of the entry header tank and exit header tank are made brazing material-free.

Abstract: A tube used in a heat exchanger, wherein a tube body includes a curved end portion, a pair of parallel portions, a pair of inclination portions, and a fixed portion in which a long end part extending from one of the pair of inclination portions is bent to hold therebetween a short end part extending from the other of the pair of inclination portions, and the tube is a pipe member having a flattened shape in cross-section. Poor brazing is reduced by making the inclination angle of at least part of the other inclination portion with respect to the flat plate portion larger than that of the one inclination portion.

Abstract: A receiver includes a cylindrical main tank; a cylindrical internal thread component having an internal thread; a cap having a male thread threaded with the internal thread; a sealing attached to the cap; and a filter portion arranged in the cap. The internal thread component is coaxially arranged to an inner circumference face of the tank. The filter portion includes an internal passage extending inside of the cap, and a net that collects a foreign matter contained in refrigerant flowing through the internal passage.

Abstract: A cylindrical member of a tube for a heat exchanger is made of a pair of flat plate portions, and a pair of curved portions for connecting the pair of flat plate portions to each other. One of the pair of curved portions constructs a bonded portion in which an outer wall portion and an inner wall portion are bonded to each by brazing in a state where the outer wall portion and the inner wall portion overlap each other. The inner wall portion has a portion opposite to the outer wall portion put into close contact with the outer wall portion and is bonded to the one flat plate portion in a state where a tip end portion of the inner wall portion opposite to the one flat plate portion is separated from the one flat plate portion.

Abstract: A receiver includes a cylindrical main tank; a cylindrical internal thread component having an internal thread; a cap having a male thread threaded with the internal thread; a sealing attached to the cap; and a filter portion arranged in the cap. The internal thread component is coaxially arranged to an inner circumference face of the tank. The filter portion includes an internal passage extending inside of the cap, and a net that collects a foreign matter contained in refrigerant flowing through the internal passage.

Abstract: In a condenser for an air conditioning system, in particular for motor vehicles, comprising a condensing section (1b) and a supercooling section (1c) which is arranged above the condensing section, comprising an approximately tubular modulator (2) which is divided by a separating wall (2b) into a lower section (2c), which is connected to the condensing section (1b), and an upper section (2d), which is connected to the supercooling section (1c), comprising an ascending pipe (4) between the lower and upper sections of the modulator, and comprising a container (7) for desiccant in the lower section (2c) of the modulator, the modulator (2) is provided at the upper side with a plug (6), it being possible for the separating wall (2b) with the desiccant container to be removed upwards out of the modulator once the plug has been detached from the interchangeable unit.

Abstract: In a condenser for an air conditioning system, in particular for motor vehicles, comprising a condensing section (1b) and a supercooling section (1c) which is arranged above the condensing section, comprising an approximately tubular modulator (2) which is divided by a separating wall (2b) into a lower section (2c), which is connected to the condensing section (1b), and an upper section (2d), which is connected to the supercooling section (1c), comprising an ascending pipe (4) between the lower and upper sections of the modulator, and comprising a container (7) for desiccant in the lower section (2c) of the modulator, the modulator (2) is provided at the upper side with a plug (6), it being possible for the separating wall (2b) with the desiccant container to be removed upwards out of the modulator once the plug has been detached from the interchangeable unit.

Abstract: A heat exchanger includes a connector for connecting a header tank to an exterior pipe. The connector includes a first member configured to define a communication path through which a tank open portion of the header tank communicates with an interior of the exterior pipe, and a second member to which the first member is fixed. The first member and the second member are fixed to each other after being separately formed by pressing, and the second member has a fastening portion through which the connector is fastened to the exterior pipe. Furthermore, the first member includes a first connection portion that is fitted into the tank open portion at one open side of the communication path, and a second connection portion fitted to an open portion of the exterior pipe at other open side of the communication path.

Abstract: In a heat exchanger for cooling air, tubes are disposed vertically and header tanks are connected to the ends of the tubes. The lower side header tank is formed with drains, which are depressions, at positions between the tubes so that condensed water, which accumulates on the lower side header tank, drains away through the drains. Each of the drains has substantially a V-shaped cross-section to facilitate drainage of the water.

Abstract: In a heat exchanger comprising a hollow header (2) and a plurality of heat exchanging tubes (1) which are in fluid communication with the header (1), the cross-sectional shape of the header (2) is formed into an angular cross-sectional shape including a rectangular cross-sectional shape and a square cross-sectional shape. Furthermore, the inner space of the header (2) is divided into a plurality of collecting chambers (13) by header-partitioning walls (12) provided in the header (2), and that the inner surface (14) of the tube-non-connecting-side wall in the collecting chamber (13) is formed into a curved surface. As a result, the inner volume of the header (2) can be reduced greatly as compared with that of the conventional header while securing sufficient pressure resistance and lightweight. Furthermore, the heat exchanger can be further miniaturized and the amount of the refrigerant to be used can be reduced.

Abstract: In a heat exchanger for cooling air, tubes are disposed vertically and header tanks are connected to the ends of the tubes. The lower side header tank is formed with drains, which are depressions, at positions between the tubes so that condensed water, which accumulates on the lower side header tank, drains away through the drains. Each of the drains has substantially a V-shaped cross-section to facilitate drainage of the water.

Abstract: An evaporator comprises a pair of upper and lower horizontal header tanks, a group of heat exchange tubes arranged laterally of the evaporator in front and rear two rows and each connected to the upper header tank and the lower header tank respectively, and a vertical partition wall provided inside the upper header tank and extending laterally of the evaporator so as to form sectioned header chambers for causing a refrigerant to flow through each pair of front and rear adjacent heat exchange tubes in directions opposite to each other. An inlet is provided for a liquid-vapor mixture refrigerant in a sectioned rear header chamber, and an outlet is provided for vaporized refrigerant in a sectioned front header chamber. The evaporator is 3 to 30% in channel opening ratio.

Abstract: An evaporator comprises a pair of upper and lower horizontal header tanks, a group of heat exchange tubes arranged laterally of the evaporator in front and rear two rows and each connected to the upper header tank and the lower header tank respectively, and a vertical partition wall provided inside the upper header tank and extending laterally of the evaporator so as to form sectioned header chambers for causing a refrigerant to flow through each pair of front and rear adjacent heat exchange tubes in directions opposite to each other. An inlet is provided for a liquid-vapor mixture refrigerant in a sectioned rear header chamber, and an outlet is provided for vaporized refrigerant in a sectioned front header chamber. The evaporator is 3 to 30% in channel opening ratio.

Abstract: A refrigerant tube for a heat exchanger, comprising: a generally flat tube 10 having generally flat upper and lower walls 12/14; a plurality of reinforcing walls 16 connected between the upper and lower walls 12/14, the reinforcing walls extending along and generally parallel with a longitudinal axis A—A of the tube and being spaced apart from one another by a predetermined distance; and a plurality of communication holes 18 distributed along the length of each reinforcing wall 16, thereby defining a plurality of discrete wall portions 20 along each reinforcing wall 16, each of the discrete wall portions 20 being disposed between adjacent communication holes 18 and having an upstream edge 22 and a downstream edge 24 thereof, the communication holes 18 and discrete wall portions 20 having lengths L1 and L2, respectively, as measured along the longitudinal axis A—A, the communication holes 18 being spaced apart along each reinforcing wall 16 by a pitch P.