JPH01229716A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To enable a crew to be prevented from driving a vehicle asleep by controlling each member, which respectively adjusts a blow direction of air or its blow amount, and blowing the air from a blow port irregularly changing the amount of air with the crew in the vehicle exposed to the blown air. CONSTITUTION:A car air conditioner 6 guides air, cooled in an evaporator 6c, to an exclusive use blow port 6g through a duct 6h while controls a damper 6i, opening and closing the duct 6h, so as to be driven by a servomotor 6j. Here the servomotor 6j is controlled by a car air conditioner control device 5, and it provides a circuit generating an M series dummy random signal. The damper 6i is opened and closed with a random interval by the M series dummy random signal. While the car air conditioner control device 5 inputs a detecting signal of a doze driving detecting device 1. Thus irregularly changing the amount of air blown from the exclusive use blow port 6g, the blown air is utilized for preventing doze driving of the driver.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to air blowing control in a vehicle air conditioner.

[Prior Art] Conventionally, air conditioners have been known that attempt to make the air blown out more natural, thereby increasing the feeling of coolness or stimulation.

For example, in Utility Model Application Publication No. 55-113617, the drive voltage of the blower is changed in a pattern that approximates natural wind,
The speed of the air blowing into the cabin is changed in a pattern similar to natural wind.

[Problem to be solved by the invention]

In the conventional technology described above, the blowing air speed is changed by changing the drive voltage of the blower, which causes changes in noise due to fluctuations in the rotation speed of the blower, complication of the blower drive circuit, and problems with the blower. Since the rotational speed of the motor changes frequently, there are problems such as the large capacity of the drive circuit.

Additionally, vehicle air conditioners are generally equipped with only one blower, so if the blower's airflow is changed frequently, the air volume from all outlets will change, which may make it unstable to maintain the temperature inside the vehicle. There is also gender.

The present invention has been made with the aim of solving such problems, and aims to provide a device that can provide vehicle occupants with a comfortable sense of the temperature of the blown air and appropriate stimulation, and that has a simple W3 configuration. purpose.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a vehicle air conditioner comprising a ventilation duct that ventilates toward a vehicle interior, and an outlet that blows air from the ventilation duct toward the vehicle interior. a wind direction adjusting means provided at the outlet and adjusting the direction of air blowing; and a control means controlling the wind direction adjusting means so that the air blown from the outlet hits the vehicle occupant with irregular air volume changes. Adopt technical means to provide

In addition, in order to achieve the above-mentioned object, in a vehicle air conditioner comprising a ventilation duct that ventilates toward the vehicle interior, and an outlet that blows out air from the ventilation duct toward the vehicle interior, the outlet and a control means that controls the damper so that the air blown from the outlet hits the vehicle occupant with irregular air volume changes. adopt.

[Operations and Effects] According to the configuration of the present invention described above, the blowing direction of the air outlet is adjusted by the wind direction adjusting means and the controlling means so that the air hitting the occupant is accompanied by irregular changes in air volume.

Furthermore, the amount of air blown out from the outlet is changed by a damper that adjusts the amount of air blown out from the outlet and the control means so that the air hitting the occupant is accompanied by irregular changes in the amount of air.

Therefore, by simply operating the wind direction adjustment means or driving the damper irregularly, the occupants can be reliably exposed to air with irregular changes in air volume, providing a comfortable warm sensation and appropriate stimulation. It can be given to the crew.

〔Example〕

Hereinafter, embodiments to which the present invention is applied will be described in detail based on the drawings.

In this embodiment, the air with irregular air volume changes supplied by the present invention is used to stimulate the vehicle driver's drowsiness.
It is used for.

In FIG. 1, reference numeral 1 denotes a dozing detection device, which detects whether a driver is dozing off based on the steering wheel operation pattern, the driver's blinking, the driver's skin potential, and the like. 2 is a drowsiness alarm, which is a lamp, a buzzer, etc. 5 is a car air conditioner control device, and 6 is a car air conditioner. The car air conditioner 6 includes a known inch-'7 unit 1-6a, blower unit 6b, evaporator 6C, compressor 6d,
Equipped with a heater core 6e and an air mix damper 6f, there is also a dedicated air outlet 6g provided at the bottom of the column cover of the steering wheel of the vehicle to blow air toward the driver's face.
, a duct l-6h that guides the air cooled by the evaporator 6C to the dedicated outlet 6g, a damper 61 that opens and closes this duct 6h, and a servo motor 6j that drives this damper 61.

Further, the car air conditioner control device 5 includes a control device including a microcomputer and a circuit that generates an M-sequence pseudo-random signal, and drives the servo motor 6j using the M-sequence pseudo-random signal to drive the damper 61.
is configured to open and close at random intervals.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

First, the drowsiness detection device 1 determines the driver's wakefulness level, and when the driver's wakefulness level decreases, it sends a detection signal to the car air conditioner control device 5. When the car air conditioner control device 5 inputs the detection signal, it operates the compressor 6d, drives the servo motor 6j based on the M-sequence random signal, and opens and closes the damper 6j irregularly.

As a result, the driver receives air cooled by the evaporator 6C on his face, and can wake up from sleepiness.

Further, since the supply of cool air is irregularly interrupted by the damper 61, the driver continues to receive appropriate stimulation during this period, and the driver's tension level can be maintained for a long time.

In addition, in this embodiment, a part of the air blown by the car air conditioner 6 is directly introduced into the passenger compartment and blown only towards the driver's face, so that the target temperature in the passenger compartment is maintained at 11u degrees. The function is sufficiently ensured by the air mix damper 6r, and this temperature control function is hardly impaired.

In addition, by irregularly intermittent cold air from the dedicated air outlet 6g, the occupants receive moderate stimulation and are able to obtain an appropriate range of cold air, resulting in an unusually cold sensation due to the continuous supply of cold air. Never.

In the above-mentioned embodiment, the damper 61 is used to intermittent ventilation to the dedicated air outlet 6g, but as shown in FIG. You may move it.

In addition, in FIG. 2, the M-sequence random signal generation circuit 7a
This is built into the motor drive circuit 7b and the car air conditioner control device 5.

If cool air is supplied to the driver's face at irregular intervals using a movable roof halo k as shown in FIG. 2, it is possible to provide the driver with appropriate stimulation and a feeling of cold air, similar to the damper 61 shown in FIG. can.

Although the M-sequence signal described in the above embodiment is a periodic signal, it is known that if the period is set to an appropriate value, it becomes a sufficiently random signal for humans. In the embodiments described above, a binary M-sequence signal was used to control the opening and closing of the damper or the swinging of the louver.

For example, FIG. 3 shows an example using n (5) D flip-flops. In FIG. 3, the output is taken from the output of an arbitrary flip-flop. When n=5 and the initial value is Xo ''XI =X2 =Xs=X, =1, the subsequent series is Xk =X, -
(exclusive OR), and the signal is as shown in FIG.

In the embodiments described above, cold air is blown onto the occupant's face, but this is not limited to cold air, and may be air whose temperature is adjusted by an air mix damper. In this way, irregular changes in air volume can provide appropriate warmth and stimulation, and the temperature inside the vehicle can also be properly adjusted.

In addition, the signal for irregularly driving the damper or looper is not limited to the M-sequence pseudo-random signal, but can be any signal that has such irregularity that humans cannot recognize its periodicity. The signal source can also be processed by software processing by a microcomputer without providing a special circuit.

In addition, it is not necessary to specifically detect the alertness level of the occupant to prevent dozing off.
It may be determined that there is a possibility that the alertness level may decrease, and the configuration may be such that the blowing air according to the present invention is supplied in response to this determination.

Further, in the embodiment described above, an example was shown in which the present invention was applied to prevent the driver from dozing off, but even if the present invention is applied to a normal air conditioner outlet, the occupants can still enjoy a comfortable sense of the temperature of the blowing air.
U with moderate stimulation without getting used to the blowing wind! There is a great effect that can be obtained by using VT.

For example, it is conceivable to supply the blowing air according to the present invention by determining whether the vehicle interior air conditioning is stable based on the detected value of the internal temperature sensor and the set value of the temperature setting device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment to which the present invention is applied, FIG. 2 is a block diagram of another embodiment to which the present invention is applied, and FIG. 3 is a circuit diagram showing an example of an M-sequence signal generation circuit. FIG. 4 is a waveform diagram showing an example of an M-sequence signal. 1... Doze detection device, 5... Car air conditioner control device, 6... Car air conditioner, 6g... Dedicated air outlet, 6
h...Duck), 6i...Damper, 6k...Movable louver, 7a...M series pseudo random signal generation circuit, 7
b...Motor drive circuit.

Claims (1)

[Claims] (1) In a vehicle air conditioner comprising a ventilation duct that ventilates toward the vehicle interior, and an outlet that blows air from the ventilation duct toward the vehicle interior, the air conditioner is provided at the outlet and has a direction in which the air is blown out. and a control means that controls the wind direction adjustment means so that the air blown out from the outlet hits the vehicle occupant with irregular air volume changes. air conditioning equipment. (2) In a vehicle air conditioner comprising a ventilation duct that ventilates toward the vehicle interior, and an outlet that blows air from the ventilation duct toward the vehicle interior, the amount of air blown from the outlet is adjusted. An air conditioner for a vehicle, comprising: a damper; and a control means for controlling the damper so that the air blown out from the outlet hits an occupant of the vehicle with irregular changes in air volume.