JPH0747833A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To eliminate troublesome operation by automatically-opening and -closing a opening/closing shutter mounted onto the branched part of a branch duct according to the temperature of air which flows through a main duct. CONSTITUTION:A driving member 12 made of shape memory alloy which is 7 deformed according to the temperature of air passing through the inside of a main duct 2, closes an opening/closing shutter 7 when air temperature is below a prescribed value, and opens the opening/closing shutter 7 when air temperature exceeds the prescribed value is mounted onto the opening/closing shutter 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art Generally, in a vehicle air conditioner mounted on a bus or the like, a main duct 2 connected to a cooling / heating unit 1 extends from under the floor of a vehicle main body 3 to a ceiling thereof, as shown in FIGS. The branch duct 4 which is arranged in such a manner as to branch from the middle of the main duct 2 is extended to the foot portion of the driver's seat 5, and the opening / closing shutter 7 can be freely opened and closed at the branch part 6 of the branch duct 4 from the middle of the main duct 2. It has a configuration of being arranged.

In the figure, 8 is a heating duct that branches from a predetermined position downstream of the branch portion 6 of the branch duct 4 of the main duct 2 and extends to the foot of the passenger seat 9, and 10 is a downstream end portion of the main duct 2. From the ceiling of the driver's seat 5 and the passenger seat 9
An air-conditioning duct that extends to the ceiling portion of 11 is a cooling / heating switching shutter that guides cool air during cooling to the cooling duct 10 and warm air during heating to the heating duct 8.

[0004]

In the above-described vehicle air conditioner, the opening / closing operation of the opening / closing shutter 7 is performed by the driver operating the manual lever (not shown), and therefore the cooling operation is performed. At times, when cold air flows to the feet of the driver's seat 5, the driver operates the manual lever to close the opening / closing shutter 7 each time, but this operation is troublesome. It had the drawback of being.

In view of the above situation, the present invention intends to provide an air conditioner for a vehicle, which can automatically open and close the opening / closing shutter in accordance with the temperature of the air flowing in the main duct, thereby eliminating the need for troublesome operation. It is a thing.

[0006]

According to the present invention, there is provided a main duct connected to an air conditioning unit, a branch duct extending from the middle of the main duct to a foot portion of a driver's seat, and a branch portion of the branch duct which can be opened and closed. In an air conditioner for a vehicle equipped with an opening / closing shutter disposed in, the opening / closing shutter is closed when the temperature of the air is deformed according to the temperature of the air flowing through the main duct, and the opening / closing shutter is closed. A drive member made of a shape memory alloy for opening the opening / closing shutter when the temperature of air exceeds a predetermined value is attached to the opening / closing shutter.

[0007]

Therefore, when the cool air having a temperature lower than the predetermined temperature flows in the main duct during cooling, the driving member made of the shape memory alloy is deformed into a desired shape and the opening / closing shutter is closed. Less flow to the feet.

On the other hand, when hot air having a temperature higher than a predetermined temperature flows in the main duct during heating, the shape memory alloy drive member is deformed from the shape during cooling to a desired shape, and the open / close shutter is opened. Part of the wind flows from the branch duct to the feet of the driver's seat.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
2 and FIG. 3 represent the same parts, and the basic structure is the same as the conventional one shown in FIG. 2 and FIG. 3, but the features of this embodiment are as follows. 1 is deformed according to the temperature of the air flowing through the main duct 2, the opening / closing shutter 7 is closed when the temperature of the air is below a predetermined value, and the temperature of the air reaches a predetermined value. The point is that a drive member 12 made of a shape memory alloy that opens the opening / closing shutter 7 when it is crossed is attached to the opening / closing shutter 7.

In this embodiment, an opening / closing shutter mounting frame 19 having an opening 20 slightly larger than the rectangular opening / closing shutter 7 is attached to the inner peripheral wall of the entrance portion of the branch duct 4 branched from the main duct 2 so as to fit therein. Holes 26, 27 for supporting a shaft 15 described later and holes 28, 29 for inserting or fixing the driving member 12 by inserting or engaging the driving member 12 are formed at opening edge portions on both sides of the opening / closing shutter mounting frame 19. Brackets 13 and 14 are installed so as to project to the inside of the main duct 2, brackets 17 and 18 project from both sides of the opening / closing shutter 7 to the inside of the main duct 2, and a shaft 15 that penetrates the brackets 17 and 18 is provided. Both ends of the opening shutter 7 are inserted into the holes 26 and 27 of the brackets 13 and 14 to be supported, whereby the opening / closing shutter 7 is attached to the opening / closing shutter mounting frame. 9 shaft 1 in the opening 20 of the
5, the shaft 15 is fitted with a drive member 12 made of a shape memory alloy and formed in a coil spring shape, and one end of the drive member 12 is connected to the shaft 15. It is bent in parallel and inserted into the hole 28 of the bracket 13 to be engaged or fixed, and the other end is engaged with the surface of the opening / closing shutter 7 via a mounting member 16 to prevent the temperature of the drive member 12 from changing. The opening / closing shutter 7 can open and close the branch duct 4 by a corresponding deformation operation. The opening / closing shutter mounting frame 1
Since the opening 20 of the opening 9 is slightly larger than the opening / closing shutter 7, when the opening / closing shutter 7 is closed, the gaps 21, 22, 2 are provided between the periphery of the opening / closing shutter 7 and the opening 20.
3 and 24 are formed, the gaps 21 and 2 are formed.
By forming 2, 23 and 24, the opening / closing shutter 7
The opening and closing operation of is performed smoothly. Further, in this embodiment, the hole 29 formed in the bracket 14
Is not used.

With the above-described structure, when cold air below a predetermined temperature flows in the main duct 2 during cooling, the driving member 12 made of a shape memory alloy and formed in a coil spring shape is shown in FIG.
Since the opening / closing shutter 7 is closed and the opening / closing shutter 7 is closed as shown in FIG.
The gaps 21, 22, 23, formed between the
Only a small amount branches from 24 to the branch duct 4, and the cold air flowing from the branch duct 4 to the feet of the driver's seat becomes extremely small.

On the other hand, when hot air having a temperature higher than a predetermined temperature flows in the main duct 2 during heating, the driving member 12 made of a shape memory alloy and formed into a coil spring has a shape as shown in FIG. The other end, which is engaged with the surface of 7 through the mounting bracket 16, is deformed so as to rotate clockwise around the shaft 15 in FIG. Part flows from the branch duct 4 to the foot of the driver's seat.

In this way, the opening / closing shutter 7 can be automatically opened / closed according to the temperature of the air flowing in the main duct 2, and it becomes possible to eliminate the troublesome operation.

The vehicle air conditioner of the present invention is not limited to the above-described embodiment, and the drive member 12 is not limited to the coil spring shape, but various shapes can be selected. Needless to say, various changes can be made without departing from the scope of the present invention.

[0016]

As described above, according to the vehicle air conditioner of the present invention, the opening / closing shutter attached to the branch portion of the branch duct is automatically opened / closed according to the temperature of the air flowing in the main duct. Thus, it is possible to obtain an excellent effect that a troublesome operation can be unnecessary.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an overall schematic diagram of a general vehicle air conditioner.

FIG. 3 is an enlarged view of a part III in FIG.

[Explanation of symbols]

 1 Air Conditioning Unit 2 Main Duct 4 Branch Duct 5 Driver's Seat 6 Branch 7 Open / Close Shutter 12 Drive Member

Claims (1)

[Claims] 1. A main duct connected to an air conditioning unit, a branch duct that branches from a midway of the main duct and extends to a foot portion of a driver's seat, and an opening / closing shutter that is openably and closably disposed at the branch portion of the branch duct. In a vehicle air conditioner equipped with, the air conditioner deforms according to the temperature of the air flowing through the main duct, closes the opening / closing shutter when the temperature of the air is below a predetermined value, and the temperature of the air exceeds the predetermined value. A vehicle air conditioner, characterized in that a drive member made of a shape memory alloy for opening the opening / closing shutter is attached to the opening / closing shutter.