VEHICLE AIR-CONDITIONING CONTROL APPARATUS

• US 20130098090A1
• Filed: 10/24/2012
• Published: 04/25/2013
• Est. Priority Date: 10/25/2011
• Status: Active Grant

• Current Assignee: Calsonic Kansei Corporation
• Original Assignee: Calsonic Kansei Corporation
• Inventors: MORI, Yoshiteru
• Granted Patent: US 9,315,089 B2
• Time in Patent Office: Days
• US Class Current: 62/243
• CPC Class Codes: B60H 1/00778 the input being a stationary vehicle position, e.g. parking or stopping
• CPC Class Codes: B60H 1/00864 Ventilators and damper doors
• CPC Class Codes: B60H 1/3208 Vehicle drive related control of the compressor drive means, e.g. for fuel saving purposes
• CPC Class Codes: B60H 1/322 for improving the stop or idling operation of the engine
• CPC Class Codes: F25B 2327/001 of the internal combustion type

Abstract

An air-conditioning unit for a vehicle that has an idling stop function, may include: a blower fan configured to blow air; a first air-outlet port configured to permit air blown from the blower fan toward a first portion of a vehicle cabin; a second air-outlet port configured to permit air blown from the blower fan toward a second portion of the vehicle cabin; and an air-conditioning controller. The air-conditioning controller is configured to: set a target air-outlet port temperature of the air blown from the first and second air-outlet ports on a basis of a preset temperature and an environmental condition of the vehicle; if the blower fan is operating to blow air from both of the first and second air-outlet ports before the vehicle is brought into an idling stop state, and then the vehicle is brought into the idling stop state, cause a controlled reduction in an air volume blown from at least one of the first and second air-outlet ports during the idling stop state; and cancel the controlled reduction when the idling stop state is cancelled.

Claims

1. An air-conditioning unit for a vehicle that has an idling stop function, comprising:

a blower fan configured to blow air;

a first air-outlet port configured to permit air blown from the blower fan toward a first portion of a vehicle cabin;

a second air-outlet port configured to permit air blown from the blower fan toward a second portion of the vehicle cabin; and

an air-conditioning controller configured to;

set a target air-outlet port temperature of the air blown from the first and second air-outlet ports on a basis of a preset temperature and an environmental condition of the vehicle,

if the blower fan is operating to blow air from both of the first and second air-outlet ports before the vehicle is brought into an idling stop state, and then the vehicle is brought into the idling stop state, cause a controlled reduction in an air volume blown from at least one of the first and second air-outlet ports during the idling stop state, and

cancel the controlled reduction when the idling stop state is cancelled.

2. The air-conditioning unit according to claim 1, wherein the air-conditioning controller is configured to:

cause the controlled reduction in the air volume blown from the at least one of the first and second air-outlet ports starting when the idling stop state is entered, and

cancel the controlled reduction when the idling stop state is canceled.

3. The air-conditioning unit according to claim 1, further comprising a compressor, powered by a vehicle engine, configured to compress coolant;

and an evaporator configured to cool air blown from the blower fan using the coolant compressed by the compressor.

4. The air-conditioning unit according to claim 1, wherein the compressor is configured to be stopped during the idle-stop state, and to be restarted when an idling stop release condition is satisfied or a state of discomfort in the vehicle cabin is detected in the idling stop state.

5. The air-conditioning unit according to claim 1, wherein the air-conditioning controller is configured to calculate a cabin temperature of the vehicle and to determine the air volume to be reduced when the vehicle is brought into the idling stop state based on (i) the target air-outlet port temperature, (ii) the cabin temperature before the vehicle is brought into the idling stop state, and (iii) the cabin temperature when the vehicle is in the idling stop state.

6. The air-conditioning unit according to claim 1, wherein the air-conditioning controller is configured to reduce the air volume blown from the at least one of the first and second air-outlet ports during the idling stop state by an amount corresponding to an air volume blown out from the at least one of the first and second air-outlet ports before the vehicle is brought into the idling stop state.

7. The air-conditioning unit according to claim 1, wherein the air-conditioning controller is configured to reduce the air volume blown from the at least one of the first and second air-outlet ports during the idling stop state by reducing the air volume to be blown by the blower fan.

8. The air-conditioning unit according to claim 7, wherein the air-conditioning controller is configured to reduce the air volume to be blown by the blower fan gradually.

9. The air-conditioning unit according to claim 1, wherein the air-conditioning controller is configured such that air blown from the blower fan is recirculated from the vehicle cabin when the vehicle is in the idling stop state.

10. The air-conditioning unit according to claim 1, further comprising a first door configured to be rotatable to block the air flow through the first air-outlet port and a second door configured to be rotatable to block the air flow through the second air-outlet port, wherein the air-conditioning controller is configured to reduce the air volume blown from the at least one of the first and second air-outlet ports by changing an opening degree of at least one of the first and second doors.

11. The air-conditioning unit according to claim 1, wherein the first portion of the vehicle cabin is an upper portion of the vehicle cabin, and the second portion of the vehicle cabin is a lower portion of the vehicle cabin.

12. An air-conditioning unit for a vehicle that has an idling stop function, comprising:

a blower fan configured to blow air into a vehicle cabin;

a compressor, powered by a vehicle engine, configured to compress coolant;

an evaporator configured to cool air blown from the blower fan using the coolant compressed by the compressor;

a first air-outlet port configured to permit air blown from the blower fan toward an upper portion of the vehicle cabin;

a second air-outlet port configured to perform air blown from the blower fan toward a lower portion of the vehicle cabin; and

an air-conditioning controller configured to;

set a target air-outlet port temperature of air blown from the first and second air-outlet ports based on a temperature set by a vehicle passenger and an environmental condition of the vehicle,

change an air volume to be blown by the blower fan,

in a case where air is blown from both of the first and second air-outlet ports before the vehicle is brought into an idling stop state and then the vehicle is brought into the idling stop state, operate a control to reduce an air volume blown from one of the first and second air-outlet ports when the vehicle is brought into the idling stop state, and

stop the control when the idling stop state is cancelled.

13. The air-conditioning unit according to claim 12, wherein the air-conditioning controller is configured to reduce the air volume blown from the one of the first and second air-outlet ports when the vehicle is brought into the idling stop state on a basis of (i) the target air-outlet port temperature, (ii) a cabin temperature of the vehicle calculated by the air-conditioning controller before the vehicle is brought into the idling stop state, and (iii) the cabin temperature of the vehicle when the vehicle is brought into the idling stop state.

14. The air-conditioning unit according to claim 12, wherein the air-conditioning controller is configured to reduce the air volume blown from the one of the first and second air-outlet ports by an amount corresponding to the air volume blown from the one of the first and second air-outlet ports before the vehicle is brought into the idling stop state.

15. The air-conditioning unit according to claim 12, wherein the air-conditioning controller is configured to reduce the air volume blown from the one of the first and second air-outlet ports by reducing an air volume to be blown from the blower fan.

16. The air-conditioning unit according to claim 12, wherein the air-conditioning controller is configured to reduce the air volume blown from the one of the first and second air-outlet ports by changing an opening degree of a door that is configured to block the air flow from the one of the first and second air-outlet ports.

17. A method of air-conditioning in a vehicle having an idling stop function, comprising:

blowing air through a first air-outlet port toward a first portion of a vehicle cabin and blowing air through a second air-outlet port toward a second portion of the vehicle cabin before an idling stop state;

bringing the vehicle into the idling stop state;

causing a controlled reduction in an air volume blown through at least one of the first and second air-outlet ports during the idling stop state; and

canceling the controlled reduction when the idling stop state is cancelled.

18. The method according to claim 17, further comprising setting a target air-outlet port temperature of the air blown through the first and second air-outlet ports on a basis of a preset temperature and an environmental condition of the vehicle.

19. The method according to claim 17, wherein the controlled reduction in the air volume blown through the at least one of the first and second air-outlet ports starts when the idling stop state is entered, and the controlled reduction is canceled when the idling stop state is canceled.

20. The method according to claim 17, wherein the controlled reduction in the air volume blown through the at least one of the first and second air-outlet ports is performed by at least one of reducing the air volume to be blown by a blower fan or rotating a door such that the air flow through the at least one of the first and second air-outlet ports is at least partially blocked.