Vehicle HVAC temperature control system

1. An HVAC system, comprising:

a heater;

an air conditioner; and

a ventilation housing configured to conduct air from the heater or air from the air conditioner or both,

wherein the ventilation housing comprises:

a floor outlet;

a defrost outlet;

a panel outlet;

a first mode door configured to regulate a flow of air at the defrost outlet and at the floor outlet;

a second mode door;

a third mode door configured to select a mixture of air from the air conditioner and air from the heater;

a first baffle located on the ventilation housing and protruding from a side of the ventilation housing between the air conditioner and the third mode door, the first baffle being disposed upstream of the third mode door in a cold air path, and projecting above the heater, and

a second baffle that deflects cold air toward an outboard side of the ventilation housing and provides space for warm air to flow toward a panel center,

wherein the ventilation housing has an indentation on a side portion of the ventilation housing and disposed adjacent to the third mode door, which indentation is structured to deflect, along with the first baffle, cold air towards a center part of the ventilation housing and to provide space for warm air to flow toward the floor outlet.

2. The HVAC system of claim 1 , wherein the defrost outlet is located proximate to the floor outlet.

3. The HVAC system of claim 1 , wherein the first mode door comprises a first wall rotationally mounted on a first hinge member, a second wall rotationally mounted on the first hinge member, and an arc member connecting the first wall and the second wall, and

wherein the first wall and the arc member are resistant to the flow of air.

4. The HVAC system of claim 3 , wherein the second mode door is configured to regulate the flow of air at the panel outlet.

5. The HVAC system of claim 4 , wherein the second mode door comprises a first wall rotationally mounted on a second hinge member, a second wall rotationally mounted on the second hinge member, and an arc member connecting the first and second walls of the second mode door,

wherein the arc member of the second mode door is resistant to the flow of air, and

wherein the first and second walls of the second mode door are resistant to the flow of air along parts of respective lengths of the first and second walls of the second mode door.

6. The HVAC system of claim 5 , wherein the first mode door and the second mode door are each configured to pivot within a portion of the housing that is at least in part semicircular, such that a gap between a wall member and the semicircular portion of the housing is minimal for at least a portion of traversable angle of the respective first or second mode door.

7. The HVAC system of claim 4 , wherein the ventilation housing is configured to be operable in a bi-level mode, and

wherein the first mode door and the second mode door are configured to regulate the flow of air in the bi-level mode such that an air flow path is longer to the panel outlet than to the floor outlet.

8. An HVAC system capable of operating in a bi-level mode, comprising:

a heater;

an air conditioner; and

a ventilation housing configured to conduct air from the heater or air from the air conditioner or both,

wherein the ventilation housing comprises:

a floor outlet;

a defrost outlet;

a panel outlet;

a first mode door configured to regulate a flow of air at the defrost outlet and at the floor outlet;

a second mode door;

a third mode door;

a first baffle disposed upstream of the third mode door in a cold air path, the first baffle located on the ventilation housing and protruding from a side of the ventilation housing between the air conditioner and the third mode door, projecting above the heater, and structured to deflect a cold air stream toward a center part of the ventilation housing, and

a second baffle that deflects cold air toward an outboard side of the ventilation housing and provides space for warm air to flow toward a panel center,

wherein each of the first, second, and third mode doors comprises a first wall rotationally mounted on a hinge member, a second wall rotationally mounted on the hinge member, and an arc member connecting the first and second walls, and

wherein the first baffle extends along a curve in a same direction as the arc member of the third mode door.

9. The HVAC system of claim 8 , wherein the defrost outlet is located proximate to the floor outlet.

10. The HVAC system of claim 8 , wherein the first wall of the first mode door and the arc member of the first mode door are resistant to the flow of air.

11. The HVAC system of claim 8 , wherein the second mode door is configured to regulate the flow of air at the panel outlet.

12. The HVAC system of claim 11 , wherein the arc member of the second mode door is resistant to the flow of air and the first and second walls of the second mode door are resistant to the flow of air along parts of respective lengths of the first and second walls of the second mode door.

13. The HVAC system of claim 12 , wherein the first mode door and the second mode door are each configured to pivot within a portion of the housing that is at least in part semicircular, such that a gap between a wall member and the semicircular portion of the housing is minimal for at least a portion of traversable angle of the respective first or second mode door.

14. The HVAC system of claim 8 , wherein the ventilation housing is configured to be operable in a bi-level mode, and

wherein the first mode door and second mode door are configured to regulate the flow of air in the bi-level mode such that an air flow path is longer to the panel outlet than to the floor outlet.

15. The HVAC system of claim 12 , wherein the third mode door is configured to select a mixture of air from the air conditioner and air from the heater.

16. A method of manufacturing an HVAC system, comprising:

providing a ventilation housing;

providing a first mode door configured to regulate a flow of air at a defrost outlet and at a floor outlet;

providing a second mode door configured to regulate the flow of air at a panel outlet; and

providing a third mode door,

wherein the ventilation housing is configured to be operable in a bi-level mode,

wherein the first mode door and second mode door are configured to regulate the flow of air in the bi-level mode such that an air flow path is longer to the panel outlet than to the floor outlet,

wherein a first baffle is located on the ventilation housing and protrudes from a side of the ventilation housing between an air conditioner and the third mode door, the first baffle being disposed upstream of the third mode door in a cold air path, and projecting above a heat source,

wherein a second baffle deflects cold air toward an outboard side of the ventilation housing and provides space for warm air to flow toward a panel center, and

wherein an indentation on a side portion of the ventilation housing and disposed adjacent to the third mode air door deflects, along with the first baffle, cold air towards a center part of the ventilation housing and provides space for warm air to flow toward the floor outlet.

17. The method of claim 16 , wherein the first mode door comprises a first wall rotationally mounted on a first hinge member, a second wall rotationally mounted on the first hinge member, and an arc member connecting the first wall and the second wall, and

wherein the first wall and the arc member are resistant to the flow of air.

18. The method of claim 17 , wherein the second mode door comprises a first wall rotationally mounted on a second hinge member, a second wall rotationally mounted on the second hinge member, and an arc member connecting the first and second walls of the second mode door, and

wherein the arc member of the second mode door is resistant to the flow of air and the first and second walls of the second mode door are resistant to the flow of air along parts of respective lengths of the first and second walls of the second mode door.

19. The method of claim 18 , wherein the first mode door and the second mode door are each configured to pivot within a portion of the housing that is at least in part semicircular, such that a gap between a wall member and the semicircular portion of the housing is minimal for at least a portion of traversable angle of the respective first or second mode door.

20. A vehicle having a ventilation system comprising the HVAC system of claim 1 .

21. The HVAC system of claim 1 , wherein each of the first, second and third mode doors comprises a first wall rotationally mounted on a hinge member, a second wall rotationally mounted on the hinge member, and an arc member connecting the first and second walls.

22. The HVAC system according to claim 1 , wherein the second baffle is located on and protrudes from the side of the ventilation housing.

23. The HVAC system according to claim 1 , wherein the second baffle is discrete from the first baffle.