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A downstream side air passage of a an automotive air conditioner unit is partitioned into at least two or more independent small air passages with a plurality of partition plates extending along an air flow direction. Doors are provided for the respective small air passages and the small air passage

A downstream side air passage of a an automotive air conditioner unit is partitioned into at least two or more independent small air passages with a plurality of partition plates extending along an air flow direction. Doors are provided for the respective small air passages and the small air passages each can distribute air that is independently conditioned to desired temperatures within themselves. A driving mechanism drives the doors in a slidable fashion.

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1. An automotive air conditioner comprising:a casing;an evaporator disposed in said casing;an upstream air passage in said casing through which intake air is introduced into said evaporator;a heater core disposed in said casing, said heater core positioned downstream from said evaporator;a downstrea

1. An automotive air conditioner comprising:a casing;an evaporator disposed in said casing;an upstream air passage in said casing through which intake air is introduced into said evaporator;a heater core disposed in said casing, said heater core positioned downstream from said evaporator;a downstream air passage formed between said evaporator and said heater core, through which cooled air output from said evaporator flows;at least one partition plate disposed in said downstream air passage, said partition plate forming independent sub-air passages in said downstream air passage;a plurality of doors disposed in said downstream air passage, at least one of said plurality of doors being disposed in each of said independent sub air-passages, each door of said plurality of doors extending substantially parallel to one another and in the same plane, each of said plurality of doors including a toothed section;a gear for causing sliding movement of said at least one of said plurality of doors by engagement with the toothed section of said at least one of said plurality of doors when said gear rotates; anda driving mechanism coupled to said gear and configured to drive said at least one of said plurality of doors in a slidable fashion,wherein each of said plurality of doors selectively controls the amount of said cooled air output from said evaporator flowing to said heater core,wherein each of said plurality of doors is capable of sliding independently of one another. 2. The automotive air conditioner of claim 1, wherein said at least one partition plate extends in a direction parallel to said airflow direction. 3. The automotive air conditioner of claim 2, wherein each of said doors extends in plane that is substantially perpendicular to said airflow direction, to stop air flow. 4. The automotive air conditioner of claim 1, wherein said at least one partition plate comprises two partition plates that are disposed in said downstream air passage, forming three independent sub-air passages in said downstream air passage. 5. The automotive air conditioner of claim 4, wherein said at least one of said plurality of doors is disposed in one of said three independent sub-air passages, and wherein said gear is supported by one of said two partition plates. 6. The automotive air conditioner of claim 4, wherein at least one of said sub-air passages directs air to at least one front seat vent, and another one of said sub-air passages directs air to a rear seat vent. 7. The automotive air conditioner of claim 6, wherein two of said sub-air passages direct air to at least one front seat vent, and the other said sub-air passage directs air to a rear seat vent. 8. The automotive air conditioner of claim 1, wherein said partition plate extends substantially completely in said downstream air passage, from said evaporator to said heater core. 9. The automotive air conditioner of claim 1, wherein each of said plurality of doors is controlled independently from one another. 10. The automotive air conditioner of claim 1, wherein each of said plurality of doors has substantially the same shape. 11. The automotive air conditioner of claim 1, further comprising a bypass passage, wherein each of said plurality of doors controls the amount of said cooled air output from said evaporator flowing in said bypass passage. 12. The automotive air conditioner of claim 11, wherein said at least one partition plate subdivides said bypass passage and said downstream passages into at least two bypass passages and at least two downstream passages, respectively. 13. The automotive air conditioner of claim 1, wherein said evaporator and said heater core each have flow faces, wherein the flow faces of said evaporator are disposed substantially parallel to the flow faces of said heater core. 14. The automotive air conditioner of claim 13, wherein the respective flow faces of said evaporator and said heater core are disposed substantially vertically. 15. The automotive air con ditioner of claim 1, wherein said toothed section is provided along an outer edge surface of said one at least of said plurality of doors, and wherein said gear engages with said toothed section to achieve a sliding movement of said at least one of said plurality of doors. 16. The automotive air conditioner of claim 1, the automotive air conditioner having an air passage downstream of said heater core, the automotive air conditioner further comprising:a downstream plate provided in the air passage downstream of said heater core, wherein said downstream plate diverts air passing through said heater core, to achieve mixing with air that bypasses said heater core. 17. The automotive air conditioner of claim 1, wherein said gear causes sliding movement of said at least one of said plurality of doors along a longitudinal axis of said at least one of said plurality of doors. 18. The automotive air conditioner of claim 1, wherein said gear for causing sliding movement of said at least one of said plurality of doors is spaced apart from other doors of said plurality of doors. 19. The automotive air conditioner of claim 1, wherein air-facing surfaces of each of said plurality of doors are positioned substantially parallel to one another in a same plane. 20. An automotive air conditioner comprising:a casing;an evaporator disposed in said casing;an upstream air passage in said casing through which intake air is introduced into said evaporator;a heater core disposed in said casing, said heater core positioned downstream from said evaporator;a downstream air passage formed between said evaporator and said heater core, through which cooled air output from said evaporator flows;a plurality of air mix doors positioned in said downstream air passage and substantially parallel to one another in a plane extending perpendicular to the direction of air flow;a gear for causing sliding movement of at least one of said plurality of air mix doors by engagement with said at least one of said plurality of air mix doors when said gear rotates; anda driving mechanism coupled to said gear and configured to drive said at least one of said plurality of air mix doors in a slidable fashion;wherein a first one of said plurality of air mix doors controls an amount of said cooled air flowing to said heater core and directed to a rear seat vent, andwherein a second one of said plurality of air mix doors controls an amount of said cooled air flowing to said heater core and directed to a front seat vent,wherein each of said plurality of air mix doors is capable of sliding independently of one another. 21. The automotive air conditioner of claim 20, wherein each of said plurality of air mix doors is controlled independently from one another. 22. The automotive air conditioner of claim 20, further comprising a bypass passage, wherein each of said plurality of air mix doors controls the amount of said cooled air output from said evaporator flowing in said bypass passage. 23. The automotive air conditioner of claim 20, wherein said evaporator and said heater core each have flow faces, wherein the flow faces of said evaporator are disposed substantially parallel to the flow faces of said heater core. 24. The automotive air conditioner of claim 23, wherein the respective flow faces of said evaporator and said heater core are disposed substantially vertically. 25. The automotive air conditioner of claim 20, wherein each of said plurality of air mix doors has substantially the same shape. 26. The automotive air conditioner of claim 20, wherein air-facing surfaces of each of said plurality of air mix doors are positioned substantially parallel to one another in a same plane. 27. The An automotive air comprising:a casing;an evaporator disposed in said casing;an upstream air passage in said casing through which intake air is introduced into said evaporator;a heater core disposed in said casing, said heater core positioned downstream from said evaporator;a downstream air passag e formed between said evaporator and said heater core, through which cooled air output from said evaporator flows;at least one partition plate disposed in said downstream air passage, said partition plate forming independent sub-air passages in said downstream air passage;a plurality of doors disposed in said downstream air passage, at least one of said plurality of doors being disposed in each of said independent sub air-passages, each door of said plurality of doors extending substantially parallel to one another and in the same plane, each of said plurality of doors including a toothed section;a gear for causing sliding movement of said at least one of said plurality of doors by engagement with the toothed section of said at least one of said plurality of doors when said gear rotates; anda driving mechanism coupled to said gear and configured to drive said at least one of said plurality of doors in a slidable fashion,wherein each of said plurality of doors selectively controls the amount of said cooled air output from said evaporator flowing to said heater core,wherein said at least one of said plurality of doors has a concave expanding portion at an interior section thereof, to facilitate air flow in a corresponding one of the sub-air passages. 28. The automotive air conditioner of claim 27, wherein said at least one of said plurality of doors has first and second flat portions respectively disposed above and below said concave expanding portion.