JPH0416672Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a sensor-equipped deodorizer that detects the presence of a person using an ultrasonic sensor and automatically drives a deodorizing fan.

(Background Art) Conventionally, deodorizers that obtain a deodorizing effect by driving a fan generally keep the fan rotating at all times or rotate the fan for a certain period of time using a manual switch such as a push button switch. This type of deodorizer is usually powered by batteries, and if the fan is constantly rotating, the battery life will be shortened, and if the switch is a manual switch, it is cumbersome to press, making it impossible to obtain an effective deodorizing effect. I was doing a lot of things. One solution to this problem is to use an ultrasonic sensor that detects moving objects to automatically rotate the fan, but conventionally, the ultrasonic sensor is constantly operating, which reduces the current consumption of the ultrasonic sensor. This increase has little effect on extending the battery life, and has the drawback that the ultrasonic sensor continues to output detection signals due to the wind from the fan, causing the fan to continue rotating.

(Purpose of the invention) The purpose of the invention is to prevent the detection signal from the ultrasonic sensor from being input to the next timer by cutting off the power to the ultrasonic sensor while the fan is rotating. The object of the present invention is to economically and effectively obtain a deodorizing effect and to reduce total power consumption.

(Disclosure of the invention) [Example 1] In Fig. 1, the ultrasonic sensor 1 is of a moving object detection type, and continuously transmits ultrasonic waves and receives reception by the Doppler effect that occurs when a moving object is present. A human body is detected by detecting changes in the frequency of waves, and a timer 2 operates for a certain period of time based on the detection signal from the ultrasonic sensor 1. Fan drive circuit 3
is operated by the output of the timer 2 to rotate the fan 4 and evaporate the deodorant 5 or the fragrance 6. The output of the timer 2 is input to the power supply control circuit 7, and the power to the ultrasonic sensor 1 is cut off while the timer 2 is operating.

When the ultrasonic sensor 1 detects a human body, the fan 4 rotates for a certain period of time according to the timer 2.
Since there is no need to detect a human body during this period, the power supply control circuit 7 cuts off the power to the ultrasonic sensor 1 and stops the operation of the ultrasonic sensor 1. This prevents the ultrasonic sensor 1 from malfunctioning due to the wind from the fan 4, causing the fan 4 to stop stopping.Furthermore, the total current consumption can be reduced, so the battery life can be extended. This effect is timer 2
The longer the set time is, or the more times the timer 2 operates, the greater the value.

(Effects of the Invention) As described above, the present invention includes a moving object detection type ultrasonic sensor that detects a human body, a timer that operates for a certain period of time based on the detection signal of the ultrasonic sensor, and a fan that operates based on the output of the timer. It consists of a drive circuit and a fan that evaporates deodorants, fragrances, etc., and inputs the output of the timer to a power supply control circuit to cut off the power to the ultrasonic sensor while the timer is operating. Since the detection signal from the ultrasonic sensor is not input to the timer, it is possible to prevent the fan from continuing to rotate due to malfunction of the ultrasonic sensor due to the rotation of the fan, resulting in a deodorizing effect. can be obtained economically and effectively, and power consumption can be reduced by cutting off the power to the ultrasonic sensor.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of one embodiment of the present invention. In the figure, 1 is an ultrasonic sensor, 2 is a timer, 3 is a fan drive circuit, 4 is a fan, 5 is a deodorant, 6 is an air freshener, and 7 is a power supply control circuit.

Claims (1)

[Scope of utility model registration request] A moving object detection type ultrasonic sensor that detects a human body, a timer that operates for a certain period of time based on the detection signal of the ultrasonic sensor, a fan drive circuit that operates based on the output of the timer, and evaporates deodorants, fragrances, etc. The output of the timer is input to the power supply control circuit and the fan drive circuit, and while the timer is operating, the power to the ultrasonic sensor is cut off, and the ultrasonic sensor is A deodorizer with a sensor that prevents a detection signal from the sensor from being input to the timer.