JPH0487612A - Air cleaner - Google Patents

Abstract

PURPOSE:To reduce noises in automatic operation, to eliminate the need for troublesome setting and to improve operability by providing a photosensor for detecting the brightness of the surroundings and a means for setting the upper-limit speed of a fan motor in proportion to the brightness detected. CONSTITUTION:When a switch 15 is pushed, the speed of a fan motor 3 is automatically controlled by a control part 1 based on the output of a gas sensor 5. In this case, the output of a photosensor 7 is simultaneously detected, and the upper-limit speed is limited to 'high' when it is bright, to 'low' when it is dark and to 'moderate' when it is moderate. Since the upper-limit speed of the fan motor 3 is automatically limited by the output of the photosensor 3 in this way, the usability is remarkably improved in the bedroom at night, nursery, living room, etc., where noises have to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an air cleaner that sucks air into a main body using a fan motor, removes dust through an air cleaning section, and then discharges the air.

(b) Problems to be solved by conventional technology and inventions
Air purifiers using a fan motor are known to be equipped with a gas sensor that can manually control the speed of the fan motor, or to automatically control the rotation speed based on the output of the gas sensor (Japanese Patent Application Laid-open No. 64 -67268).

However, when a high concentration of gas is detected, the fan motor rotates at a high speed and the fan noise becomes louder, causing a problem that it gives a harsh and unpleasant feeling, especially when sleeping at night. In addition, in this case, the user sets the rotation speed control range during automatic operation, but since the user perceives noise differently at night and during the day, it is necessary to reset the range. This is a practical problem.

This invention was made with these circumstances in mind, and it reduces noise during automatic operation, improves operability by eliminating the hassle of setting, and improves operability in bedrooms, children's rooms, living rooms, etc. This provides an extremely easy-to-use air purifier that is suitable for places where quiet operation is required.

(C) Means for Solving the Problems The present invention includes a sensor for detecting air pollution, an air purification section, a fan motor for supplying air to the air purification section and discharging the purified air, and a sensor for detecting air pollution. In an air purifier equipped with a control unit that changes the speed of the fan motor according to the output, there is a light detection sensor that detects the surrounding brightness, and a light detection sensor that changes the speed of the fan motor in proportion to the surrounding brightness based on the output of the light detection sensor. This air purifier is characterized by comprising a setting means for setting an upper limit speed of a fan motor.

The present invention includes a light detection sensor, a signal reception section that receives a remote control optical signal from the outside via the light detection sensor, a dirt detection sensor that detects dirt in the air, and an air purification section. An air purifier comprising a fan motor that supplies air to an air purifying unit and exhausts purified air, and a control unit that changes the speed of the fan motor according to the output of either a signal receiving unit or a dirt detection sensor. The machine includes a light detection means for detecting ambient brightness by receiving the output of the light detection sensor, and a setting means for receiving the output of the light detection means and setting the upper limit speed of the fan motor in proportion to the surrounding brightness. This air purifier is characterized by:

(d) By automatically limiting the upper limit speed of the fan motor based on the output of the active light detection sensor, usability can be greatly improved in nighttime bedrooms, children's rooms, living rooms, etc. where noise must be reduced. .

(e) Examples Hereinafter, the present invention will be described in detail based on examples shown in the drawings. This invention is not limited by this.

In Figure 1, 9: ACii source connects this to the power supply section lO.
The voltage is converted to the voltage required for each part. Reference numeral 1 denotes a control unit including a microcomputer, which includes an operation unit 2, a load control unit 4 that controls the fan motor 3, a gas detection unit 6 that detects the output of the gas sensor 5, and a light sensor that detects the output of the optical sensor 7. Sensor detection section 8 and display section II are connected.

As shown in FIG. 2(a), the display unit 11 includes LEDs 13a to 13c that display the rotational speed of the fan motor 3;
The operating unit 2 includes an LED 12 that displays the automatic operation state, and LEDs 11a-11d that displays the indoor dirt state.
As shown in FIG. 2(b), there is a stop switch 14 for stopping operation, and a switch 15 for instructing automatic operation.
, and a switch 16 for instructing manual operation.

In such a configuration, when stopped (including the period after the IT power is turned on until the automatic operation switch 15 or manual operation switch 16 is pressed), the LEDs 11a to 11lid that indicate dirt, the LED 12 that indicates automatic operation, and the fan motor 3 The LED 13a=I3c that displays the rotational speed of the fan motor 3 is turned off and the fan motor 3 is also stopped, but the control unit 1 constantly calculates the output of the gas sensor 5 and calculates the dirt state.

When the manual operation switch 16 is pressed, the LED 12 remains off, but the fan motor 3 speed display LED
D13a=I3c changes depending on the number of times the switch 16 is pressed.
3c'' LED I3a lights up in the order, and at the same time, the rotational speed of the fan motor 3 also switches from low to medium to high to low.

The LED IIa-+1d for dirt indication is changed from LED l 11 to LED 1 by the output of the gas sensor 5 when there is a lot of dirt, regardless of the rotation speed of the fan motor 3.
1 Lights up in the direction of d.

When the switch I5 for automatic operation is pressed f2, the control unit 1
automatically switches the rotation speed of the fan motor 3 according to the output of the gas sensor 5, or detects the output of the optical sensor 7 at the same time, and selects "high" when it is bright, "1 low" when it is dark, and "1" when it is in between. Limit the upper rotational speed to the mesoembryo.

That is, even if the determination based on the output of the gas sensor 5 is "high", if the upper limit determination based on the output of the optical sensor 7 is "medium", the rotational speed of the fan motor 3 is determined to be "medium". This relationship is shown in Table 1.

FIG. 3 of Table 1 is a diagram corresponding to FIG. 1 showing another embodiment of the present invention. A remote control unit 2a that outputs an optical signal (pulse code string signal) and a remote control signal detection unit 20 that detects the signal via an optical sensor 7 are provided.

The output of the remote control signal detection section 20 is processed by the control section 1 in the same way as the output of the operation section 2 (FIG. 1). The other configurations and functions are the same as those of the embodiment shown in FIG.

In other words, in this embodiment, the optical sensor 7 has a function of detecting the surrounding brightness and a function of receiving an optical signal for remote control. The speed is controlled similarly to the previous embodiment.

(F) Effects of the Invention According to this invention, an air purifier with good usability is provided in which the upper limit rotational speed of the fan motor is automatically limited depending on the surrounding brightness and the noise is reduced at night. Be it. This is especially suitable for bedrooms, living rooms, children's rooms, etc. that require quietness at night.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 (
a) and FIG. 2(b) are detailed explanatory diagrams of the display section and operation section shown in FIG. 1, respectively, and FIG. 3 is a diagram corresponding to FIG. 1 showing an embodiment of the pond of the present invention. Control unit, 2...Operation unit, fan motor, 4...Load control unit, gas sensor, 6
... Gas sensor detection section, optical sensor, 8... Optical sensor detection section. Figure 2 (a) Figure 2 (b)

Claims (1)

[Claims] 1. A sensor for detecting air pollution, an air purification section, a fan motor for supplying air to the air purification section and discharging the purified air, and a fan motor according to the output of the sensor. In an air purifier equipped with a control unit that changes the speed of the fan, there is a light detection sensor that detects the surrounding brightness, and the upper limit speed of the fan motor is set in proportion to the surrounding brightness based on the output of the light detection sensor. An air purifier characterized by being equipped with a setting means. 2. A light detection sensor, a signal reception section that receives an optical signal for remote control from the outside via the light detection sensor, a dirt detection sensor that detects air pollution, an air purification section, and an air purification section that transmits air to the air purification section. In an air purifier equipped with a fan motor that supplies and discharges purified air, and a control unit that changes the speed of the fan motor according to the output of either a signal receiving unit or a dirt detection sensor, optical detection is used. It is characterized by comprising a light detection means for detecting the ambient brightness by receiving the output of the sensor, and a setting means for receiving the output of the light detection means and setting the upper limit speed of the fan motor in proportion to the ambient brightness. Air purifier.