Abstract: A heat exchanger includes left and right header tanks disposed in parallel; top and bottom side plates that couple respectively both ends of the pair of the header tanks; a first plurality of tubes connected between the pair of the header tanks at both ends that are disposed in a region nearer the bottom side plate as a condenser; and a second plurality of tubes that are disposed in a region nearer the top side plate as an oil cooler. Each tube in the second tubes has a cross-sectional shape identical to that of each tube in the first tubes and the top side plate is formed to have a squared U-shaped cross section so that a return pipe communicating with the second tubes can be disposed along a groove having the squared U-shaped cross section of the top side plate.

Abstract: A heat exchanger that can prevent damage to joints of tubes and side plates at core plates and is easy to produce which has side plates enabling stable brazing of the tubes and fins with the side plates, that is, a heat exchanger provided with a plurality of tubes through a heat exchange medium passes, a plurality of fins alternately stacked with the tubes and increasing the heat transfer of the heat exchange medium, core plates to which the two ends of the tubes are connected, and side plates arranged at the outsides in the stacking direction from the end fins arranged at the outermost sides in the stacking direction of the fins and connected to the core plates, wherein at least one of the side plates has a plurality of bridge portions at intermediate locations in the longitudinal direction, and at least one location of the bridge portions has a slit provided by cutting after the brazing of the tubes and the fins.

Abstract: A heat exchanger module includes a condenser for condensing a refrigerant, a modulator, a sub-cooler for cooling liquid refrigerant supplied from the modulator, and a heat exchanger for cooling a fluid different from the refrigerant. The condenser, the sub-cooler and the heat exchanger are arranged in an arrangement direction substantially perpendicular to an air flow direction. Further, the modulator is disposed to extend in the arrangement direction. In the heat exchanger module, the modulator has a dimension that is larger than the sum of a dimension of the condenser and a dimension of the sub-cooler, and is not larger than the sum of the dimension of the condenser, the dimension of the sub-cooler and a dimension of the heat exchanger, in the arrangement direction. Accordingly, a capacity of the modulator can be effectively increased without increasing a largest outer side of the heat exchanger module.

Abstract: A heat exchanger module includes a condenser for condensing a refrigerant, a modulator, a sub-cooler for cooling liquid refrigerant supplied from the modulator, and a heat exchanger for cooling a fluid different from the refrigerant. The condenser, the sub-cooler and the heat exchanger are arranged in an arrangement direction substantially perpendicular to an air flow direction. Further, the modulator is disposed to extend in the arrangement direction. In the heat exchanger module, the modulator has a dimension that is larger than the sum of a dimension of the condenser and a dimension of the sub-cooler, and is not larger than the sum of the dimension of the condenser, the dimension of the sub-cooler and a dimension of the heat exchanger, in the arrangement direction. Accordingly, a capacity of the modulator can be effectively increased without increasing a largest outer side of the heat exchanger module.

Abstract: A heat exchanger module includes a condenser for condensing a refrigerant, a modulator, a sub-cooler for cooling liquid refrigerant supplied from the modulator, and a heat exchanger for cooling a fluid different from the refrigerant. The condenser, the sub-cooler and the heat exchanger are arranged in an arrangement direction substantially perpendicular to an air flow direction. Further, the modulator is disposed to extend in the arrangement direction. In the heat exchanger module, the modulator has a dimension that is larger than the sum of a dimension of the condenser and a dimension of the sub-cooler, and is not larger than the sum of the dimension of the condenser, the dimension of the sub-cooler and a dimension of the heat exchanger, in the arrangement direction. Accordingly, a capacity of the modulator can be effectively increased without increasing a largest outer side of the heat exchanger module.

Abstract: A heat exchanger that can prevent damage to joints of tubes and side plates at core plates and is easy to produce which has side plates enabling stable brazing of the tubes and fins with the side plates, that is, a heat exchanger provided with a plurality of tubes through a heat exchange medium passes, a plurality of fins alternately stacked with the tubes and increasing the heat transfer of the heat exchange medium, core plates to which the two ends of the tubes are connected, and side plates arranged at the outsides in the stacking direction from the end fins arranged at the outermost sides in the stacking direction of the fins and connected to the core plates, wherein at least one of the side plates has a plurality of bridge portions at intermediate locations in the longitudinal direction, and at least one location of the bridge portions has a slit provided by cutting after the brazing of the tubes and the fins.

Abstract: A radiator 9 for electric parts use, which cools an inverter and others relating to the control of an electric motor, and a condenser 12 for condensing refrigerant are arranged in parallel with each other with respect to the direction of an air flow on an upstream side of the air flow of a radiator 8 for engine use. Due to the above arrangement, as the air temperatures at the inlets of the radiator 8 for electric parts use and the condenser 12 are low, a temperature difference between air and cooling water and a temperature difference between air and refrigerant are increased, and it becomes possible to enhance the performance of the radiator 8 for electric parts use and the condenser 12.

Abstract: A heat exchanger 51 comprises: left and right header tanks 53 and 55 disposed in parallel; top and bottom side plates 57 and 59 that couple respectively both ends of the pair of the header tanks 53 and 55; a first tubes 61 comprised of a plurality of tubes connected between the pair of the header tanks 53 and 55 at both ends that is disposed in a region somewhat nearer the bottom side plate 59 as a condenser; and a second tubes that is disposed in a region somewhat nearer the top side plate 57 as an oil cooler, wherein each tube in the second tubes 99 has a cross-sectional shape identical to that of each tube in the first tubes 61 and the top side plate 57 is formed to have a squared U-shaped cross section so that a return pipe 101 communicating with the second tubes 99 can .re disposed along a groove having the squared U-shaped cross section of the top side plate 57. Therefore, this heat exchanger can be manufactured easily with low cost and it can prevent the return pipe from being crushed.

Abstract: A bracket portion and a caulking pawl portion are provided on a tank cap closing an end portion of a first refrigerant header tank of an evaporator. Brazing is carried out in a state where the pawl portion is caulked and provisionally fixed to side plates by the pawl portion. As the evaporator and a radiator for electric components are coupled through the bracket portion, the coupling distance can be reduced and a suitable fastening strength between the evaporator and the radiator for electric components can be secured.

Abstract: A heat exchanger has first and second header tanks, multiple built-up tubes connected between the header tanks. A communication pipe is also connected between the header tanks. A separator is provided in the first header tank, so that a tank space of the first header tank is divided into first and second sub-tank spaces. The first sub-tank space is communicated with the multiple built-up tubes, whereas the second sub-tank space is communicated with the communication pipe. An inlet pipe is connected to the second sub-tank space and fluidically connected to an automatic transmission through a vehicle delivery pipe, wherein a flow path sectional area of the communication pipe is almost equal to that of the delivery pipe.

Abstract: A radiator 9 for electric parts use, which cools an inverter and others relating to the control of an electric motor, and a condenser 12 for condensing refrigerant are arranged in parallel with each other with respect to the direction of an air flow on an upstream side of the air flow of a radiator 8 for engine use. Due to the above arrangement, as the air temperatures at the inlets of the radiator 8 for electric parts use and the condenser 12 are low, a temperature difference between air and cooling water and a temperature difference between air and refrigerant are increased, and it becomes possible to enhance the performance of the radiator 8 for electric parts use and the condenser 12.

Abstract: Even in the case where an additional heat exchanger must be arranged at the downstream side in the air flow direction of a multiple heat exchanger, a high flow-rate of air can be supplied to the additional heat exchanger arranged at the downstream side. In a state in which a reinforcement plate 3d of an outdoor heat exchanger 3 and a reinforcement plate 2d of a first radiator 2 come next to and overlap each other in series in the cooling air flow direction, both the reinforcement plates 2d and 3d are joined with a bolt 5. Due to this, a distance h between a first heat exchange core 2c and a second heat exchange core 3c is reduced. Therefore, air for cooling can be supplied, at a high flow-rate, to a second radiator 3 arranged at the downstream side.

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: In a condenser of a refrigerant cycle, a throttle portion is provided at a predetermined position in one of first and second header tanks to decompress refrigerant while refrigerant meanderingly flows within the one of the first and second header tanks. Therefore, refrigerant from the throttle portion is sufficiently mixed with refrigerant directly flowing from tubes into a downstream space of the throttle portion in the one of the first and second header tanks. Accordingly, even when gas refrigerant is directly introduced from a part of the tubes directly into the lower downstream space, the gas refrigerant can be effectively heat-exchanged with the refrigerant flowing from the throttle portion. As a result, it can restrict refrigerant from being discharged from the condenser in a gas-liquid two-phase state.

Abstract: A radiator 9 for electric parts use, which cools an inverter and others relating to the control of an electric motor, and a condenser 12 for condensing refrigerant are arranged in parallel with each other with respect to the direction of an air flow on an upstream side of the air flow of a radiator 8 for engine use. Due to the above arrangement, as the air temperatures at the inlets of the radiator 8 for electric parts use and the condenser 12 are low, a temperature difference between air and cooling water and a temperature difference between air and refrigerant are increased, and it becomes possible to enhance the performance of the radiator 8 for electric parts use and the condenser 12.

Abstract: Even in the case where an additional heat exchanger must be arranged at the downstream side in the air flow direction of a multiple heat exchanger, a high flow-rate of air can be supplied to the additional heat exchanger arranged at the downstream side. In a state in which a reinforcement plate 3d of an outdoor heat exchanger 3 and a reinforcement plate 2d of a first radiator 2 come next to and overlap each other in series in the cooling air flow direction, both the reinforcement plates 2d and 3d are joined with a bolt 5. Due to this, a distance h between a first heat exchange core 2c and a second heat exchange core 3c is reduced. Therefore, air for cooling can be supplied, at a high flow-rate, to a second radiator 3 arranged at the downstream side.

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 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 heat exchanger module includes a condenser for condensing a refrigerant, a modulator, a sub-cooler for cooling liquid refrigerant supplied from the modulator, and a heat exchanger for cooling a fluid different from the refrigerant. The condenser, the sub-cooler and the heat exchanger are arranged in an arrangement direction substantially perpendicular to an air flow direction. Further, the modulator is disposed to extend in the arrangement direction. In the heat exchanger module, the modulator has a dimension that is larger than the sum of a dimension of the condenser and a dimension of the sub-cooler, and is not larger than the sum of the dimension of the condenser, the dimension of the sub-cooler and a dimension of the heat exchanger, in the arrangement direction. Accordingly, a capacity of the modulator can be effectively increased without increasing a largest outer side of the heat exchanger module.

Abstract: In a condenser of a refrigerant cycle, a throttle portion is provided at a predetermined position in one of first and second header tanks to decompress refrigerant while refrigerant meanderingly flows within the one of the first and second header tanks. Therefore, refrigerant from the throttle portion is sufficiently mixed with refrigerant directly flowing from tubes into a downstream space of the throttle portion in the one of the first and second header tanks. Accordingly, even when gas refrigerant is directly introduced from a part of the tubes directly into the lower downstream space, the gas refrigerant can be effectively heat-exchanged with the refrigerant flowing from the throttle portion. As a result, it can restrict refrigerant from being discharged from the condenser in a gas-liquid two-phase state.