Air conditioning apparatus for vehicles

1. An air conditioning apparatus for a vehicle, comprising:

an air conditioning housing having a discharge chamber through which conditioned air is discharged out of the air conditioning housing, the discharge chamber comprising, in a positional sequence from a front side to a rear side of the vehicle, a defrost vent, a main vent, a floor vent and a rear seat vent, wherein the floor vent comprises a pair of floor vents formed on opposite sides of a rear portion of the air conditioning housing behind the main vent, and the rear seat vent is formed between the pair of floor vents; and

a mode door having a panel shape and sliding on the discharge chamber of the air conditioning housing, the mode door including: a front opening hole formed in a front portion of the mode door, the front opening hole having a linear shape; a pair of main opening holes formed in a rear portion of the mode door at positions spaced apart from each other by a predetermined distance; and a rear-end opening hole formed behind a first portion provided between the main opening holes,

wherein a separation bar is provided in the defrost vent, the separation bar crossing the defrost vent in a lateral direction so that the defrost vent is partitioned into a front defrost vent portion and a rear defrost vent portion by the separation bar,

wherein the mode door further includes a rear opening hole formed in the front portion of the mode door, the rear opening hole having a linear shape and being parallel to the front opening hole, and

wherein when the air conditioning apparatus is in a main-floor mode, the front opening hole is blocked by an outer wall of the air conditioning housing and the rear opening hole is blocked by the separation bar so that a defrost air-conditioning operation is not conducted, the rear-end opening hole is matched with the rear seat vent so that a rear seat air-conditioning operation is conducted, the main opening holes are matched with the main vent so that a center air-conditioning operation is performed, and a lower edge of the mode door that is disposed adjacent to the main opening holes is disposed over the floor vent so that a floor air-conditioning operation is conducted.

2. The air conditioning apparatus as set forth in claim 1 , wherein a pair of partitions are provided in the front defrost vent portion and are spaced apart from each other so that the front defrost vent portion is partitioned into three vents.

3. The air conditioning apparatus as set forth in claim 2 , wherein each of the front opening hole and the rear opening hole is partitioned into three opening holes, wherein lengths of the three opening holes are equal to lengths of the corresponding three vents of the front defrost vent portion.

4. The air conditioning apparatus as set forth in claim 1 , wherein front ends of the floor vents are collinearly disposed with a front end of the rear seat vent, and a rear end of the rear seat vent extends farther back than rear ends of the floor vents.

5. The air conditioning apparatus as set forth in claim 1 , wherein the mode door, the defrost vent, the main vent, the floor vents, the rear seat vent, the front opening hole, the main opening holes and the rear-end opening hole are rectangular.

6. The air conditioning apparatus as set forth in claim 1 , wherein a front end of the rear-end opening hole is collinearly disposed with rear ends of the main opening holes.

7. The air conditioning apparatus as set forth in claim 1 , wherein a length of the main opening holes corresponds to a length of the floor vent, and a length of the rear-end opening hole corresponds to a length of the rear seat vent.

8. The air conditioning apparatus as set forth in claim 1 , wherein when the air conditioning apparatus is in a main mode, the front opening hole is blocked by an outer wall of the air conditioning housing and the rear opening hole is blocked by the separation bar so that a defrost air-conditioning operation is not conducted, the rear-end opening hole is matched with the rear seat vent so that a rear seat air-conditioning operation is conducted, the main opening hole is matched with the main vent so that a center air-conditioning operation is conducted, and a lower edge of the mode door that is adjacent to the main opening hole closes the floor vent so that a floor air-conditioning operation is not conducted.

9. The air conditioning apparatus as set forth in claim 1 , wherein when the air conditioning apparatus is in a main-defrost mode, the front opening hole or the rear opening hole is matched with the defrost vent so that a defrost air-conditioning operation is conducted, the rear-end opening hole is matched with the rear seat vent so that a rear seat air-conditioning operation is conducted, a main opening hole is matched with the main vent so that a center air-conditioning operation is conducted, and a lower edge of the mode door that is adjacent to the main opening hole closes the floor vent so that a floor air-conditioning operation is not conducted.

10. The air conditioning apparatus as set forth in claim 1 , wherein when the air conditioning apparatus is in a main-defrost-floor mode, the front opening hole or the rear opening hole is matched with the defrost vent so that a defrost air-conditioning operation is conducted, the rear-end opening hole is matched with the rear seat vent so that a rear seat air-conditioning operation is conducted, and the main opening hole communicates with both the main vent and the floor vent so that both a center air-conditioning operation and a floor air-conditioning operation are conducted.

11. The air conditioning apparatus as set forth in claim 1 , wherein when the air conditioning apparatus is in a floor mode, the front opening hole or a front edge of the mode door is disposed over the defrost vent so that a defrost air-conditioning operation is conducted, the rear seat vent is blocked by the first portion formed between the rear opening hole and the rear-end opening hole so that a rear seat air-conditioning operation is not conducted, the main vent is blocked by a second portion formed between the rear opening hole and the main opening holes so that a center air-conditioning operation is not conducted, and the main opening holes are matched with the floor vent so that a floor air-conditioning operation is conducted.

12. The air conditioning apparatus as set forth in claim 1 , wherein when the air conditioning apparatus is in a defrost-floor mode, a front edge of the mode door is disposed over the defrost vent so that a defrost air-conditioning operation is conducted, the rear seat vent is blocked by the first portion formed between the rear opening hole and the rear-end opening hole so that a rear seat air-conditioning operation is not conducted, the main vent is blocked by a second portion formed between the rear opening hole and the main opening holes so that a center air-conditioning operation is not conducted, and the main opening holes are matched with the floor vent so that a floor air-conditioning operation is conducted.

13. The air conditioning apparatus as set forth in claim 1 , wherein when the air conditioning apparatus is in a defrost mode, a front edge of the mode door is disposed over the defrost vent so that a defrost air-conditioning operation is conducted, the rear seat vent is blocked by the first portion formed between the rear opening hole and the rear-end opening hole so that a rear seat air-conditioning operation is not conducted, and the main vent and the floor vent are blocked by a second portion formed between the rear opening hole and the main opening hole so that a center air-conditioning operation and a floor air-conditioning operation are not conducted.