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In a heater core that constitutes part of a vehicular air conditioning apparatus, first and second fins having louvers therein are arranged between a plurality of tubes. The first fins are disposed on a first heating section, which faces toward a first front passage through which air from a first bl

In a heater core that constitutes part of a vehicular air conditioning apparatus, first and second fins having louvers therein are arranged between a plurality of tubes. The first fins are disposed on a first heating section, which faces toward a first front passage through which air from a first blower unit flows, whereas the second fins are disposed on a second heating section, which faces toward a first rear passage through which air from a second blower unit flows. Further, as a boundary portion between the first heating section and the second heating section, partitioning fins, which do not contain any louvers therein, are disposed separately from the first and second fins.

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1. A heat exchanger for use in a vehicular air conditioning apparatus having a casing including first and second passages through which air flows, and a damper mechanism for switching a flow state of the air in the passages, and first and second blowers for supplying air respectively to the interior

1. A heat exchanger for use in a vehicular air conditioning apparatus having a casing including first and second passages through which air flows, and a damper mechanism for switching a flow state of the air in the passages, and first and second blowers for supplying air respectively to the interior of the casing, wherein the heat exchanger is disposed in the interior of the casing so as to straddle between the first passage and the second passage, for thereby cooling and heating the air and supplying the air, the heat exchanger comprising: a plurality of tubes through which a medium flows in the interior thereof;a first fin disposed on a first heat exchanger section, the first fin being bent in a wavy shape and having an air hole therein through which the air flows, for carrying out heat exchange on the air that flows through the first passage inside the casing;a second fin disposed on a second heat exchanger section, the second fin being bent in a wavy shape and having an air hole therein through which the air flows, for carrying out heat exchange on the air that flows through the second passage; anda partitioning member provided separately from the first and second fins and disposed between the first heat exchanger section and the second heat exchanger section,wherein the first fin and the second fin are separate and distinct from each other,wherein the partitioning member is disposed between each of the plurality of tubes and affixed to the tubes adjacent thereto so as to block the air from flowing between the first heat exchanger section and the second heat exchanger section. 2. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the partitioning member has a wavy shaped cross section perpendicular to a direction of the air passing through the heat exchanger, in the same manner as the first and second fins, but the partitioning member does not have any air holes therein. 3. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 2, wherein the partitioning member is formed from a metallic material having a smaller coefficient of thermal conductivity than a material of the first and second fins. 4. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the partitioning member has a circular shaped cross section perpendicular to a direction of the air passing through the heat exchanger, and an outer surface of the partitioning member abuts against the tubes. 5. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 4, wherein the partitioning member is formed from a metallic material having a smaller coefficient of thermal conductivity than a material of the first and second fins. 6. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a wavy shape in a cross section perpendicular to a direction of the air passing through the heat exchanger. 7. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a wavy shape in a cross section perpendicular to a direction of the air passing through the heat exchanger, and peaks of the wavy shape of the partitioning member are in contact with the tubes. 8. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a wavy shape in a cross section perpendicular to a direction of the air passing through the heat exchanger, and peaks of the wavy shape of the partitioning member are attached to the tubes by welding. 9. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a circular shape in a cross section perpendicular to a direction of the air passing through the heat exchanger. 10. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a circular shape in a cross section perpendicular to a direction of the air passing through the heat exchanger, and two portions of the circular shape of the partitioning member are in contact with the tubes. 11. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a circular shape in a cross section perpendicular to a direction of the air passing through the heat exchanger, and two portions of the circular shape of the partitioning member are attached to the tubes by welding. 12. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a C-shape in a cross section perpendicular to a direction of the air passing through the heat exchanger. 13. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a C-shape in a cross section perpendicular to a direction of the air passing through the heat exchanger, and two portions of the C-shape of the partitioning member are in contact with the tubes. 14. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the heat exchanger comprises a plurality of partitioning members respectively having a C-shape in a cross section perpendicular to a direction of the air passing through the heat exchanger, and two portions of the C-shape of the partitioning member are attached to the tubes by welding. 15. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, wherein the first and second fins have planar surfaces and cut out portions on the planar surfaces to form the holes, the cut out portions being inclined at predetermined angles with respect to the planar surfaces. 16. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, further comprising: a first blower motor that drives the first blower; anda second blower motor that drives the second blower. 17. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, further comprising: a first intake port through which air is supplied from the first blower to the first passage; anda second intake port through which air is supplied from the second blower to the second passage, the second intake port being formed perpendicularly to the first intake port. 18. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, further comprising: a first blower motor that drives the first blower;a second blower motor that drives the second blower;a first intake port through which air is supplied from the first blower to the first passage;a second intake port through which air is supplied from the second blower to the second passage, the second intake port being formed perpendicularly to the first intake port; anda ventilation-switching damper that blocks the second intake port to prevent back flowing of air into the second blower from the first blower when blowing of air from the second blower is halted and blowing of air only from the first blower is carried out. 19. The heat exchanger for use in a vehicular air conditioning apparatus according to claim 1, further comprising: a first blower motor that drives the first blower;a second blower motor that drives the second blower;a first intake port through which air is supplied from the first blower to the first passage; anda second intake port through which air is supplied from the second blower to the second passage, the second intake port being formed perpendicularly to the first intake port;wherein in a defroster mode the first blower is solely driven to supply air without driving the second blower. 20. A heat exchanger for use in a vehicular air conditioning apparatus having a casing including first and second passages through which air flows, and a damper mechanism for switching a flow state of the air in the passages, and first and second blowers for supplying air respectively to the interior of the casing, wherein the heat exchanger is disposed in the interior of the casing so as to straddle between the first passage and the second passage, for thereby cooling and heating the air and supplying the air, the heat exchanger comprising: a plurality of tubes through which a medium flows in the interior thereof;a first fin disposed on a first heat exchanger section, the first fin having a wavy shape in a cross section perpendicular to a direction of the air passing through the heat exchanger and having an air hole therein through which the air flows, for carrying out heat exchange on the air that flows through the first passage inside the casing;a second fin disposed on a second heat exchanger section, the second fin having a wavy shape in a cross section perpendicular to the direction of the air passing through the heat exchanger and having an air hole therein through which the air flows, for carrying out heat exchange on the air that flows through the second passage; anda plurality of partitioning members provided separately from the first and second fins and disposed between the first heat exchanger section and the second heat exchanger section, and respective partitioning members being disposed between the tubes,wherein the partitioning member blocks the air from flowing between the first heat exchanger section and the second heat exchanger section; andthe plurality of partitioning members respectively have a shape in a cross section perpendicular to the direction of the air passing through the heat exchanger selected from a group consisting of a wavy shape, a circular shape, and a C-shape, and when the cross sectional shape is the circular shape or the C-shape, the air passes through the inside of the circular shaped cross section or the C-shaped cross section.