JPH01253593A - Fan - Google Patents

Abstract

PURPOSE:To obtain a fan automatically responding to the required air quantity value changed with the elapse of time by providing a means automatically decreasing the air quantity in response to the elapsed time from the start of a timer. CONSTITUTION:An air quantity selecting circuit 1 inputted with signals from a controller 4 is provided, the air quantity is selected according to the setting of the controller 4, and a rotating speed control signal is outputted to a rotating speed control circuit 2. The rotating speed of a motor 3 is controlled according to the signal inputted to the rotating speed control circuit 2. The air quantity selecting circuit 1 decreases the air quantity value in proportion to the elapsed time from the start of a timer from the wind force value set via the controller 4 when signals of the timer start and the set time from a timer switch 5 are inputted, and it outputs a signal to make the air quantity value zero (motor stop signal) when the set time elapses.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electric fan.

[Conventional technology]

With conventional electric fans, the air volume is constant. Some fans allow you to change the air volume by moving a regulator or stop the fan using an off timer, but the air volume must be set manually.

[Problem to be solved by the invention]

Therefore, with the fixed air volume method, it is necessary to always manually switch the air volume to adjust if the body temperature drops too much, or even if you use an off timer at bedtime, the air volume must be set to a lower value in advance to prevent the body from getting too cold. However, there was a drawback that the off timer time had to be shortened.

[Means to solve the problem]

In order to solve the above-mentioned problems, the electric fan provided by the present invention is characterized in that it is equipped with means for automatically reducing the air volume according to the elapsed time from the start of the timer.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram in one embodiment of the present invention,
1 is an air volume selection circuit, 2 is a rotation speed control circuit, and 3 is a motor. The operation of the embodiment shown in this figure will be explained below.

The air volume selection circuit 1, which receives the signal from the regulator 4, selects the air volume according to the setting of the regulator 4 and outputs a rotation speed control signal to the rotation speed control circuit 2. The rotation speed control circuit 2 controls the rotation speed of the motor 3 according to the input signal. The air volume selection circuit 1 receives the timer start and set time signals from the timer switch 5 and decreases the air volume set by the regulator 4 in proportion to the elapsed time from the timer start until the set time is reached. The rotation speed control circuit 2 is controlled so as to stop at the same time.

〔Effect of the invention〕

As described above, according to the present invention, by providing a timer that can switch the air volume, it is possible to provide a fan that can automatically respond to the required air volume value that changes over time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. l...Air volume selection circuit, 2...Rotation speed control circuit, 3...Motor, 4...Adjuster, 5...Timer switch. Kaya / word

Claims (1)

[Claims] An electric fan characterized by being equipped with means for automatically reducing the air volume according to the elapsed time from the time when the timer starts.