JPH02119697A - Air blower - Google Patents

Abstract

PURPOSE:To improve amenity of the whole environment by providing a motor for rotating an air blowing fan and an air blowing control circuit for controlling the rotational frequency of the motor in proportion to the sound pressure recognized by a sound pressure discrimination circuit. CONSTITUTION:An air blower a comprises an air blowing fan 2, a d.c. motor 3a for rotating the fan 2, a sound pressure discrimination circuit 5 and an air blowing control circuit 6a. The air blowing control circuit 6a controls the rotational speed of a motor 3a in proportion to the sound pressure recognized by the sound pressure discrimination circuit 5. Thus, the fluctuation feeling and pressure feeling which an air flow has is superimposed on auditory feeling so as to improve the amenity of the whole environment.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a blower that can change the wind speed in conjunction with the sound pressure and sound frequency of pleasant music.

BACKGROUND ART Conventionally, it has been considered to provide comfortable ventilation. For example, some indoor training bicycles change the rotation speed of a blower installed in the front according to the rotation speed of the pedals, allowing the user to experience how hard the pedals are being pressed and giving the user the refreshing feeling of being outdoors.

Problems that the invention aims to solve However, in the case of conventional indoor training bicycles, attempts were made to change the airflow and the resulting comfort by simply changing the number of revolutions of the blower in proportion to the degree of pedal depression. It wasn't something to do. Therefore, it was not possible to generate a comfortable airflow by changing the airflow in accordance with the music.

The present invention is an attempt to solve the above-mentioned problems, and aims to provide comfort to people listening to music by changing the airflow caused by a blower in conjunction with music.

Means for Solving the Problems In order to achieve the above object, the first means of the present invention includes a blower fan, a motor for rotating the blower fan,
A blower comprising a sound pressure discrimination circuit that discriminates the magnitude of sound pressure from a sound source, and a blower control circuit that controls the rotation speed of the motor in proportion to the sound pressure recognized by the sound pressure discrimination circuit. It is.

The second means includes a blower fan, a motor that rotates the blower fan, an acoustic discrimination circuit that discriminates the magnitude of the acoustic frequency from the sound source, and an acoustic frequency that is inversely proportional to the acoustic frequency recognized by the acoustic discrimination circuit. The blower consists of a blower control circuit that controls the rotation speed of the motor.

The third means is a damper that changes the opening/closing degree of the air duct, a motor that moves the damper, and a sound pressure discrimination circuit that discriminates the magnitude of the sound pressure from the sound source. The blower consists of a blower control circuit that controls the opening degree of the damper in proportion to the pressure.

The fourth means includes a damper that changes the opening/closing degree of the air passage, a motor that moves the damper, an acoustic discrimination circuit that discriminates the magnitude of the acoustic frequency from the sound source, and an opening of the damper in inverse proportion to the acoustic frequency. The blower consists of a blower control circuit that controls the temperature.

According to the first technical means, the sound pressure from the sound source is distinguished by a sound pressure discrimination circuit, and as the sound pressure becomes larger, the rotation speed of the motor is increased by the blower control circuit.
By rotating the blower fan, the motor sends wind with a strength proportional to the sound pressure.

In the second technical means, the acoustic ettt from the sound source is discriminated between high and low by an acoustic discrimination circuit, and as the acoustic frequency increases, the rotation speed of the motor is lowered by the ventilation control circuit, and the motor is operated by the ventilation fan. By rotating the , it sends a wind whose strength is inversely proportional to the acoustic frequency.

The third technical means is to use a sound pressure discrimination circuit to distinguish the magnitude of the sound pressure from the sound source, and as the sound pressure increases, the blower control circuit rotates the motor that moves the damper, increasing the opening degree of the damper. , the amount of air is blown in proportion to the sound pressure.

The fourth technical means is to use an acoustic discrimination circuit to distinguish the high and low acoustic frequencies from the sound source, and as the acoustic frequency increases, the blower control circuit rotates the motor that moves the damper and reduces the opening degree of the damper. , the amount of air blown is inversely proportional to the acoustic frequency.

There is a lot of music in which the power spectrum of time changes in sound pressure and acoustic frequency is inversely proportional to frequency, and this property is known to give people a sense of comfort and relaxation. Therefore, by using the changes in the sound pressure and acoustic frequency of the music as the source and linking the changes in the wind speed and air volume from the blower as faithfully as possible, we can improve the pleasure we get from music by eliminating the sensation of fluctuations caused by airflow. Since the pressure sensations are superimposed, it is possible to give a person a synergistic effect of music and airflow. Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 5. Note that the structure of the blower, such as the fan and motor, is common and is not a main part of the present invention, so illustration thereof is omitted.

A first embodiment of the invention is shown in FIG. In the figure, 1a
The blower is composed of a fan 2 for blowing air, a DC motor 3a for rotating the fan 2, a sound pressure discrimination circuit 6, and a blow control circuit 6a. 4 is a sound source for the blower 1a, and a switch 44 allows switching between a sound signal taken directly from an audio device 41 and a sound signal picked up by a microphone 42 and amplified by an amplifier 43. . The sound pressure discrimination circuit 5 includes an amplifier 51 that temporarily buffers the sound signal from the sound source 4, a low-pass filter 52 that eliminates high frequency components from the sound signal, and a window comparator that discriminates the sound pressure level of the sound signal in multiple stages. It is composed of 53A to 53C. According to the sound pressure level discriminated by the sound pressure discrimination circuit 5, the voltage dividing resistors 61A to 61D of the ventilation control circuit 6a generate a specified voltage, and based on the voltage, the DC motor control circuit 62 controls the DC motor 3a. The applied voltage is changed to change the rotation speed.

When the above configuration is used, the rotation speed of the DC motor 3a can be obtained depending on the magnitude of the sound pressure from the sound source 4 as shown in FIG.
In the case of strong sound, the blower 1a can be operated with a higher wind speed or a larger air volume, creating a comfortable environment for those listening to music who can see the wind speed and volume in conjunction with the music. .

Next, a second embodiment of the present invention will be described with reference to FIG. The main structure is the same as that of the first embodiment (FIG. 1), and detailed explanation of the same parts will be omitted. The blower 1b according to this embodiment uses an AC motor 3b as a blowing motor for rotating the fan 2, and has three taps pulled out for adjusting the rotation speed, and two-way thyristors 63A, 63B, and 63C, respectively.
The sound source 4 and the sound pressure discrimination circuit 6 are the same as those in the first embodiment. Depending on the sound pressure level of the sound signal from the sound source 4 discriminated by the sound pressure discrimination circuit 5, one of the bidirectional sirinutors 63A to 63C is made conductive, and the rotation speed of the AC motor 3b is changed depending on the sound pressure of the sound source 4. It is something that makes you

A third embodiment of the present invention will be explained with reference to FIG.

Also in FIG. 3, detailed description of the same parts as in FIG. 1 will be omitted. The blower 1C according to this embodiment is composed of a DC motor 3a that rotates a 77-pin 2, an acoustic discrimination circuit 7, and a blower control circuit 6C. The sound source 4 is the same as in the first embodiment. Then, the sound signal from the sound source 4 is removed by a capacitor 71 and sent to an amplifier 72 by the sound discrimination circuit 7, and the sound pressure component for each sound frequency band of the signal is discriminated by bandpass filters 73A to 73CK. Ru. Window comparator 64 in the ventilation control circuit eC
A~64F and NAND gates 66A and 65C are
This is to determine the band with the largest sound pressure component among the acoustic frequency bands discriminated by the acoustic discrimination circuit 7, and the rotation speed of the DC motor 3a according to that band is determined by the electric dividing resistor 61A.
It is set by the output voltage of the DC motor control circuit 62 based on the voltage of ~61D. By using the above configuration, the rotation speed of the motor can be obtained depending on the magnitude of the acoustic frequency having the maximum sound pressure component from the sound source 4 as shown in Fig. 5, but the change in the rotation speed of the motor is When the acoustic frequency with the maximum sound pressure component is small and slowly fluctuating, it is possible to create a blower with a large wind speed or large air volume. It will be a comfortable environment.

A fourth embodiment of the present invention will be explained based on FIG.
Only the parts different from the third embodiment (FIG. 3) will be explained. In this embodiment, an AC motor 3b is used as the air blower 111c, and a rotation speed control tap pulled out from the winding is switched υ. Depending on the bidirectional thyristor 63A
63C is made conductive, and the rotational speed of the fan 2 is changed in accordance with the acoustic frequency having the maximum sound pressure component of the sound source 4. Note that by using the fan in the above embodiment as a damper mechanism for changing the wind speed or air volume, and using the motor as a dash bar motor for changing the degree of opening/closing of this damper, each of the above embodiments has the same purpose and the same effect. It can be made to correspond.

Further, throughout each of the above embodiments, the window comparators 53A to 53C of the sound pressure discrimination circuit 5 and the air blowing control circuit 6
The voltage division resistors 61A to 61D of a and 6c, the bandpass filter 73A of the acoustic discrimination circuit 7, and the wind comparators 64A to 64F of the ventilation control circuit sc and 6d, and the NAND gates e6A to 6tsc, and the voltage division The resistors 61A to 61D can be effectively implemented in a simpler manner by using a microcomputer.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the airflow generated by the blower changes in conjunction with music that has changes in sound pressure and acoustic frequency that people feel comfortable with, and the feeling of fluctuation in the airflow is reduced. The sense of pressure is superimposed on the sense of hearing, thereby increasing the comfort of the entire environment.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a blower according to a first embodiment of the present invention;
The figure is a circuit diagram of a blower according to a second embodiment of the present invention, FIG. 3 is a circuit diagram of a blower according to a third embodiment of the present invention, and FIG. 4 is a circuit diagram of a blower according to a fourth embodiment of the present invention. , FIG. 5 is an explanatory diagram of the control of the blower. 2...Fan, 3a...DC motor,
3b...AC motor, 5...Sound pressure discrimination circuit, 6a, 6b. 6C46d...Blower control circuit, 7...
・Acoustic discrimination circuit. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (4)

[Claims] (1) A blower fan, a motor that rotates the blower fan, a sound pressure discrimination circuit that discriminates the magnitude of the sound pressure from the sound source, and a motor that rotates the motor in proportion to the sound pressure recognized by the sound pressure discrimination circuit. A blower equipped with a blower control circuit that controls the rotation speed of the blower. (2) A blower fan, a motor that rotates the blower fan, an acoustic discrimination circuit that discriminates the magnitude of the acoustic frequency from the sound source, and a rotation of the motor in inverse proportion to the acoustic frequency recognized by the acoustic discrimination circuit. A blower equipped with a blower control circuit that controls the number of air blowers. (3) A damper that changes the opening/closing degree of the air duct, a motor that moves this damper, a sound pressure discrimination circuit that discriminates the magnitude of the sound pressure from the sound source, and a sound pressure discrimination circuit that distinguishes the magnitude of the sound pressure from the sound source. and a blower control circuit that controls the opening degree of the damper. (4) A damper that changes the opening/closing degree of the air duct, a motor that moves this damper, an acoustic discrimination circuit that discriminates the magnitude of the acoustic frequency from the sound source, and controls the opening degree of the damper in inverse proportion to this acoustic frequency. A blower equipped with a blower control circuit.