JPH06330884A - Fan for vehicle - Google Patents

Abstract

PURPOSE:To realize such an air blast as being high in comfortableness by detecting a central part in the blowing direction of a car fan with certainty, and making an air quantity at an angle in the vicinity of this central part in the blowing direction and that other than it variable. CONSTITUTION:This car fan is one that makes an air blast quantity variable through time management out of a center position at a oscillating angle, by a casing 1 with an oscillating mechanism, an electric motor 4 driving this oscillating mechanism 2 and driving a blowing impeller 3, a hole 6 for detecting the center position of the oscillating angle, each sensor 7 set up at both sides of this hole 6, a revolution selector circuit 5 and a timer circuit 8, and especially, a cleaning brush ventilating passage is installed in a part detecting the oscillating center part, through which accurate detection is made so as to be performable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle blower in which a fan casing is rotated to change a blowing direction.

[0002]

2. Description of the Related Art In recent years, the facilities for vehicles have been enriched, and particularly for air conditioning, it is required to provide comfortable air conditioning instead of simply controlling the temperature.

Conventionally, a vehicle blower of this type is as shown in FIG. As shown in the figure, it comprises a casing 101 for blowing air, a swinging mechanism 102 connected to the casing 101, an electric motor 104 for driving an impeller 103 for blowing air, and a rotation speed changeover switch 105 of the electric motor 104, These are configured to be attached to the vehicle by the fixed frame 106.

In the above structure, the electric motor 10 operates at the rotation speed (air volume) set by the rotation speed changeover switch 105.
4 operates, the rotation is transmitted to the swing mechanism 102, and the air blowing direction is changed.

[0005]

In such a conventional air blower for a vehicle, since the air volume is constant regardless of the air blowing direction, a person located directly below the air blower and a person located on both sides of the air blower experience a feeling. In addition, there is a problem that a person located directly below the blower has a very uncomfortable feeling such as hair being extruded when the air volume is large and comfortable air conditioning cannot be performed.

The present invention is intended to solve the above problems, and it is a first object of the present invention to detect the center of the air flow direction and vary the air flow rate depending on the air flow direction.

The second purpose is to prevent dust and the like from adhering to the sensing portion when detecting the center of the air flow direction.
This is to clean the surface of the sensor unit.

A third object is to construct a ventilation passage so that dust or the like will not be further attached at the sensing portion when detecting the center of the air blowing direction.

[0009]

A first means for achieving the first object of the present invention is a casing having a swinging mechanism, and an impeller for driving the swinging mechanism and for blowing air. A motor for driving the motor and a frame for fixing to the vehicle, the casing is provided with a hole for detecting the center position of the swinging angle, and sensors arranged on both sides of the hole. Is provided, and the casing is configured to change the rotation speed of the electric motor when a certain time has elapsed from the center position of the swing angle.

The second means for achieving the second object is to provide a cleaning brush at the rotation locus of the hole for detecting the center position of the swing angle of the vehicle blower, and to the sensor section. It is configured to prevent the adhesion of dust.

The third means for achieving the third object is to blow a part of the blown air to the rotation locus portion of the hole for detecting the center position of the swing angle of the vehicle blower. The air passage and the air outlet are provided to prevent dust from adhering to the sensor unit.

[0012]

According to the present invention, since the center of the blowing direction can be detected by the configuration of the first means described above, the blowing angle of the blowing can be determined, so that the blowing amount can be changed depending on the blowing angle.

Further, the structure of the second means makes it possible to clean the sensor surface of the sensing portion for detecting the center in the air blowing direction.

Further, by the constitution of the third means, it is possible to prevent clogging of the hole of the sensing portion for detecting the center in the air blowing direction.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.

As shown in the figure, a casing 1 for blowing air.
And a rotation speed switching circuit 5 of an electric motor 4 for driving a swinging mechanism 2 connected to the casing 1 and an impeller 3 for blowing air.
And a timer circuit provided on the casing 1 for detecting the center position of the swing angle and sensors 7 arranged on both sides of the hole 6, and counting the time from the time when the center of the swing angle is detected. 8, a signal is sent to the rotation speed switching circuit 5 every time a fixed time elapses, and the rotation speed of the electric motor 4 is switched. These are mounted on the vehicle by a fixed frame 12.

As described above, according to the blower for a vehicle of the first embodiment of the present invention, the operating speed of the swing mechanism 2 with respect to the rotation speed of the electric motor 4 can be calculated, so that the neck near the swing center point can be calculated. The swing angle and other angles can be managed by the time from the swing center point. As a result, it is possible to control the amount of air blown according to each swing angle.

In the embodiment, the rotation speed switching circuit 5
Although the timer circuit 8 is used, a control circuit using a microcomputer may be used, and the sensor 7 may be of various types such as a photo-sensing type, a magnetic sensing type and a micro switch.

Next, the second embodiment of the present invention will be described.
Description will be given with reference to the drawings. As shown in the figure, a cleaning brush 10 is provided on the rotation locus portion 9 of the hole 6 for detecting the center position of the swing angle.

With the above structure, the cleaning brush 10 passes through the sensor 7 in association with the rotation of the casing 1,
Dust and the like adhering to the surface of the sensor 7 can be removed, and the operation of the sensor 7 can be ensured.

Next, the third embodiment of the present invention will be described.
Description will be given with reference to the drawings. As shown in the figure, a part of the air blown by the blower is blown toward the hole 6 for detecting the center position of the swing angle by the air passage 11 and the blowout port 13.

With the above construction, the dust and the like remaining in the hole 6 for detecting the center position of the swing angle can be blown away by the wind, and the operation of the sensor can be made more reliable.

[0023]

As is apparent from the above-described embodiments, according to the present invention, the amount of blown air can be controlled by the blowing angle of the blower. If touched, it can be operated with a strong air volume, and a vehicle blower with excellent comfort can be provided.

Further, it is possible to provide a vehicle blower which has an effect of being able to detect accurately without the clogging of the permeation hole of the sensor for detecting the center of the blowing direction.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vehicle blower according to a first embodiment of the present invention.

FIG. 2 is the same configuration diagram of the second embodiment.

FIG. 3 is the same configuration diagram of the third embodiment.

FIG. 4 is a configuration diagram of a conventional vehicle blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 casing 2 swing mechanism 3 impeller 4 electric motor 5 rotation speed switching circuit 6 hole 7 sensor 8 timer circuit 9 rotation locus portion 10 cleaning brush 11 air duct 12 fixed frame 13 outlet

Claims (3)

[Claims] 1. A casing having a swing mechanism, an electric motor for driving the swing mechanism and driving an impeller for blowing air, and a frame for fixing to a vehicle, wherein the casing portion has a neck. A hole for detecting the center position of the swing angle and sensors arranged on both sides of the hole are provided, and further, a timer circuit and a rotation speed switching circuit of the electric motor are provided, and when the casing has passed a certain time from the center position of the swing angle, ,
A blower for a vehicle capable of changing the rotation speed of the electric motor to change the air volume. 2. The blower for a vehicle according to claim 1, wherein a cleaning brush is provided at a rotation locus portion of a hole for detecting a center position of a swing angle of the blower for a vehicle to prevent dust from adhering to the sensor unit. . 3. An air passage for blowing a part of blown air and an outlet are provided in a rotation locus portion of a hole for detecting a center position of a swing angle of the vehicle blower, and dust adheres to a sensor portion. The blower for a vehicle according to claim 1, wherein the blower is prevented.