Cooling system for vehicle

• US 20050029027A1
• Filed: 07/23/2004
• Published: 02/10/2005
• Est. Priority Date: 07/24/2003
• Status: Active Grant

• Current Assignee: DENSO Corporation, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: DENSO Corporation, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hoshi, Jun, Maeda, Akihiro, Kunikata, Yuhei, Sugiyama, Toshiki
• Granted Patent: US 7,497,287 B2
• Time in Patent Office: Days
• US Class Current: 180/68.100
• CPC Class Codes: B60K 11/02 with liquid cooling
• CPC Class Codes: B60K 11/04 Arrangement or mounting of radiators, radiator shutters, or radiator blinds B60K11/085 takes precedence

Abstract

In a ventilation duct of a cooling system, a level difference is formed between a wall located on a vehicle front side and a wall located on a vehicle rear side because a bottom end of the wall located on the vehicle front side is lower than a bottom end of the wall located on the vehicle rear side. The level difference makes a speed of a traveling wind flowing near an outlet faster than that flowing away from the outlet. Therefore, a pressure of the traveling wind flowing near the outlet decreases. As a result, air flows in the ventilation duct to be drawn to the neighborhood of the low-pressure outlet, and discharged out. Because cooling air including the traveling wind can be increased, heat radiation capacity of a radiator disposed in the ventilation duct is improved, and the cooling capacity of the cooling system can also be improved.

Claims

1. A cooling system for a vehicle, comprising:

a heat exchanger for radiating heat; and

a ventilation duct extending from a rear surface of the heat exchanger to a vehicle rear side, the ventilation duct having an outlet for discharging air having passed through the heat exchanger to an exterior, wherein;

the ventilation duct has a wall connected to an edge portion defining the outlet;

the wall is disposed to intersect with a vehicle front-rear direction; and

the edge portion has a front end and a rear end in the vehicle front-rear direction, which are offset from each other in a vertical direction such that an opening direction of the outlet leans to a vehicle rear side from the vertical direction.

2. The cooling system according to claim 1, wherein:

the edge portion defining the outlet is provided at a bottom side of the wall; and

a bottom end of the wall on a vehicle front side is positioned lower than a bottom end of the wall on a vehicle rear side.

3. The cooling system according to claim 1, wherein the wall is arranged to increase a flow speed of air around the outlet.

4. The cooling system according to claim 1, wherein the wall is arranged to reduce a pressure of air flowing around the outlet.

5. The cooling system according to claim 1, further comprising

a blower, disposed downstream of the heat exchanger in an air flow, for blowing air to the heat exchanger.

6. The cooling system according to claim 5, wherein:

the ventilation duct has a communication hole at a position upstream from the blower in the air flow; and

an interior of the ventilation duct communicates with an exterior of the ventilation duct through the communication hole.

7. The cooling system according to claim 5, wherein the blower is constructed with a cross-flow fan.

8. The cooling system according to claim 6, wherein:

the communication hole is provided between the heat exchanger and the blower in the air flow; and

the wall is arranged downstream from the blower in the air flow.

9. A cooling system for a vehicle, comprising:

a heat exchanger for radiating heat, the heat exchanger being mounted on a front end portion of the vehicle; and

a ventilation duct extending from a rear surface of the heat exchanger to a vehicle rear side, the ventilation duct having an outlet for discharging air having passed through the heat exchanger to an exterior, wherein;

the ventilation duct has a wall that is connected to an edge portion defining the outlet at a bottom side of the wall;

the wall is disposed to intersect with a vehicle front-rear direction; and

a bottom end of the wall on a vehicle front side is positioned lower than a bottom end of the wall on a vehicle rear side.

10. The cooling system according to claim 9, further comprising

a blower, disposed downstream of the heat exchanger in an air flow, for blowing air to the heat exchanger.

11. The cooling system according to claim 10, wherein:

the ventilation duct has a communication hole at a position upstream from the blower in the air flow; and

an interior of the ventilation duct communicates with an exterior of the ventilation duct through the communication hole.

12. The cooling system according to claim 10, wherein the blower is constructed with a cross-flow fan.

13. A cooling system for a vehicle, comprising:

a heat exchanger for radiating heat;

a ventilation duct extending from a rear surface of the heat exchanger to a vehicle rear side, the ventilation duct having an outlet for discharging air having passed through the heat exchanger to an exterior; and

a speed increasing portion provided in the ventilation duct for increasing a flow speed of air around the outlet.

14. A cooling system for a vehicle, comprising:

a heat exchanger for radiating heat;

a ventilation duct extending from a rear surface of the heat exchanger to a vehicle rear side, the ventilation duct having an outlet for discharging air having passed through the heat exchanger to an exterior; and

a pressure decreasing portion provided in the ventilation duct for decreasing a pressure of air flowing around the outlet.