JP2001091018A - Air cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wasteful consumptive of power by detecting contaminated state of indoor air accurately in a short time just after turning on a power supply to an air cleaner device and avoiding the power supply to an internal circuit of a motor in drive-stopped state and a gas sensor during stopped state of the motor. SOLUTION: A sensor 8a for sensing air-contaminated state is heated by a heater 8b and an electrical power supply amount with respect to a gas sensor is increased at a prescribed time just after turning on the power supply to a device 1. An output value of the gas sensor 8 is stabilized fast after turning on the power supply to the device 1 by increasing the amount of feeding electric power for the gas sensor 8 and then sensing of indoor air contaminated state by the gas sensor 8 is started early.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaning apparatus for rotating a fan in accordance with a detection result of a state of air contamination and purifying the air through a filter.

[0002]

2. Description of the Related Art As a conventional air purifying apparatus for purifying indoor air, there is an air purifying apparatus having a structure shown in FIG. The air cleaning apparatus 101 shown in FIG. 1 includes a fan 107 fixed to a rotation shaft of a motor 108 inside a main body 105,
The air outlet 1 formed on the upper surface of the main body 105 through the filter 104 through room air sucked from the air inlet 103 formed on the side surface or the front surface of the main body 105 by the rotation of the fan 107
It blows out indoors from 06.

[0003] A gas sensor 110 for detecting the state of contamination of indoor air is disposed on a side surface of a main body 105 of the air purifying apparatus 101.
The rotation of the fan 107 is controlled based on the detection result.
That is, the air cleaning device 101 drives the motor 108 at a rotation speed according to the degree of change in the detection output of the gas sensor 110.

For this reason, power is supplied to the gas sensor 110 regardless of whether the motor 108 is being driven or stopped. The detection result of the gas sensor 110 is displayed only while the motor 108 is driving, and is not displayed while the motor 108 is stopped.

Further, after the power supply to the air cleaning device 101 is turned on and the power supply to the gas sensor 110 is started,
Until a fixed time of about a minute elapses, the detection of the contamination state of the indoor air is not performed. This is to wait for the resistance of the gas sensor 110 to become electrically stable.
The air cleaning device 101 uses the stable detection value of the gas sensor 110 as a reference value and controls the rotation speed of the motor 108 according to the degree to which the detection value of the gas sensor 110 has changed from this reference value.

[0006]

However, in the conventional air purifying device, the gas sensor 110 does not detect the dirt condition for several minutes after the power is turned on to the device. There has been a problem that it becomes difficult to detect indoor air contamination thereafter. For example, if the user smokes immediately after turning on the power to the apparatus, the detection result of the state soiled by smoking after a predetermined time has elapsed is set as a reference value.
May not detect indoor air contamination.

Further, when the power is supplied to the apparatus, power is always supplied to the gas sensor and the internal circuit of the motor regardless of whether the motor is driven or stopped, so that power is wasted. was there.

SUMMARY OF THE INVENTION It is an object of the present invention to be able to accurately detect the contamination state of indoor air in a short time immediately after turning on the power to the apparatus, and to supply power to the internal circuit of the stopped motor and the gas sensor while the motor is stopped. It is an object of the present invention to provide an air purifying apparatus which can prevent waste of power by not supplying the air.

[0009]

The present invention has the following arrangement as means for solving the above-mentioned problems.

(1) A gas sensor for heating a sensor unit for detecting the state of air contamination by a heater, and a motor for supplying a rotational force to a fan disposed in an air flow path from an intake port to an air outlet through a filter through a filter. An air purifying apparatus including a gas sensor, a motor, and a power supply unit for supplying power to the display lamp, wherein the power supply unit includes a display lamp for displaying an energized state in the power supply unit. Is characterized by increasing the amount of power supply to the power supply.

In this configuration, immediately after the power to the apparatus is turned on, the amount of power supplied to the gas sensor is increased for a predetermined time. Therefore, the output value of the gas sensor is quickly stabilized after the power supply to the device is turned on, and the detection of the contamination state of the indoor air by the gas sensor is started early.

(2) The gas sensor receives power supply from the power supply unit for a predetermined period of time at predetermined time intervals while the driving of the motor is stopped, and compares the detection result during this period with the detection result during driving of the motor. Features.

In this configuration, power is supplied to the gas sensor only for a predetermined time at predetermined time intervals while the motor is stopped. Therefore, the supply time of the power to the gas sensor during the stop of the driving of the motor is shortened, and the power consumption is reduced as compared with the case where the power is always supplied.

(3) The power supply of the internal circuit is shut off while the motor is stopped.

In this configuration, power is not supplied to the internal circuit of the motor while driving is stopped. Therefore, power is not consumed by the internal circuit of the motor while the driving is stopped.

(4) A fixed delay time is provided between the on / off timing of the power supply of the internal circuit and the output timing of the speed control signal when the motor starts and stops driving. .

In this configuration, a plurality of signals are not simultaneously input to the internal circuit of the motor. Therefore, the motor is driven safely.

(5) The power supply section reduces the amount of power supply to the display lamp while the driving of the motor is stopped.

In this configuration, the amount of power supplied to the display lamp during the stop of the motor operation is smaller than that during the operation of the motor. Therefore, the amount of power consumed by the display lamp while the driving of the motor is stopped is reduced.

[0020]

FIG. 1 is a side sectional view showing a configuration of an air purifying apparatus according to an embodiment of the present invention. The air purifying apparatus 1 has a fan 5, a motor 6 for supplying a rotational force to the fan 5, and a suction port 2 formed on a front surface of a main body 7 containing a filter 3, and an air outlet 11 formed on an upper surface.
The indoor air sucked from the suction port 2 by the rotation of the fan 5 by the drive of is blown into the room from the air outlet 11 through the filter 3. The motor 6 is an inverter motor capable of controlling the rotation speed, and the motor 6 is provided with a rotation detection sensor 9 for detecting the rotation speed. An operation panel 10 is arranged on an upper part of the front surface of the main body 7. In the operation panel 10, a gas sensor 8 for detecting a state of contamination of room air is provided.

FIG. 2 is a diagram showing a configuration of an operation panel of the air cleaning device. An operation panel 10 arranged on the upper front of the main body 1 has an operation on / off button 1 for receiving a selection operation of turning on / off the power supply to the air cleaning device 1.
4. An operation mode selection button 15 for accepting an operation for switching the operation mode between "tobacco", "pollen" and "automatic", and a sensitivity switch for accepting an operation for setting the sensitivity of odor and dirt and the detection sensitivity for the amount of dust. A switch 16, a power lamp 17 for displaying an on / off state of the power supply to the apparatus, an operation mode lamp 18 for displaying a selection of an operation mode, a filter replacement lamp 19 for displaying a replacement time of the filter 3, and light emission from a remote controller (not shown) A remote control light receiving section 20 for receiving the operation signal thus received, and a dirt state display section 2 for displaying the dirt state of the indoor air by the gas sensor 8
1, and an air volume display unit 22 for displaying an air volume according to the rotation speed of the motor 6.

A gas sensor 8 for detecting the contamination state of the indoor air is provided in a part of the operation panel 10 configured as described above. Further, a power supply lamp 17, an operation mode lamp 18, a filter replacement lamp 19, a dirt state display section 2
1 and the lamp constituting the air volume display unit 22 correspond to the display lamp of the present invention.

Among the operation modes selected by operating the operation mode selection button 15, "tobacco" and "pollen"
The operation mode is a mode in which the motor 6 is controlled according to a predetermined sequence. The "automatic" operation mode displays the dirt state of the indoor air detected by the gas sensor 8 on the dirt state display section 21 and displays the dirt state. Control is performed to lower the rotation speed of the motor 6 when the rotation speed is low and to increase the rotation speed when the contamination state is high.

FIG. 3 is a block diagram showing a configuration of a control unit of the air cleaning device. Control unit 13 of air cleaning device 1
Is a control circuit 12 including a CPU and necessary analog circuits.
Power supply circuit 24, power supply clock circuit 25, reset circuit 26, motor drive circuit 27, gas sensor drive circuit 28,
The lamp drive circuit 29 is connected to the sensor unit 8a and the rotation detection sensor 9 that constitute the gas sensor 8.
The motor drive circuit 27 controls the rotation speed of the motor 6 based on the drive data output from the control circuit 12. As a result, the amount of ventilation of the room air in the main body 7 changes. As shown in FIG. 4, the motor drive circuit 27 includes transistors 32 and 33, and generates a motor power supply 6a to be applied to the inverter motor 6, a motor internal circuit power supply 6b, and a speed control signal 6c. The lamp driving circuit 29
As shown in FIG. 8, the lighting of the display lamps such as the power lamp 17 is controlled based on the driving data output from the control circuit 12.

The gas sensor drive circuit 28 drives the heater 8b included in the gas sensor 8 based on the drive data output from the control circuit 12, as shown in FIGS.
As shown in FIG. 5, the gas sensor 8 includes a sensor section 8a and a heater 8b. The heater section 8b is
The indoor air near the sensor 8a is heated together with the sensor 8a to promote a chemical reaction in the sensor 8a. That is, the sensor section 8a changes its resistance value by a chemical reaction when it comes into contact with contaminants such as cigarette smoke and dust contained in the indoor air. The change in the resistance value in the sensor section 8a is converted into a change in voltage and input to the control circuit 12. For this reason,
The gas sensor drive circuit 28 includes transistors 30 and 31 as shown in FIG. 6. The transistor 30 is turned on by a drive pulse output from the control circuit 12, and current is supplied from the power supply circuit 24 to the heater 8b. Next, when the transistor 31 is turned on, a voltage value representing a resistance value in the sensor unit 8a is input to the control circuit 12.

FIG. 7 is a timing chart of signals output from the motor drive circuit to the motor. The motor drive circuit 27 operates on / off the operation panel 10.
When the OFF button 14 is operated to the ON side and the apparatus 1 is energized, DC 141 V obtained by rectifying and smoothing AC 100 V is always supplied to the motor 6 as the motor power supply 6 a.
In this state, when one of the modes is selected by operating the operation mode selection button 15, the output terminal P0 of the control circuit 12 is set to "H". As a result, the transistor 33 and the transistor 32 of the motor drive circuit 27 are sequentially turned on, and the motor internal circuit power supply 6 b of DC 15 V is input to the motor 6.

The control circuit 12 outputs a speed control signal 6c from the output terminal P1 with a delay of a predetermined time after the power supply 6b of the motor internal circuit is turned on. For example, the control circuit 12 changes the voltage value of the speed control signal 6c according to the rotation speed to be realized in the motor 6, and the internal circuit of the motor 6 supplies the motor 6 with electric power corresponding to the voltage value of the speed control signal 6c. Supply. The control circuit 12 changes the content of the speed control signal 6 a based on the detection result of the rotation detection sensor 9, and performs feedback control of the rotation speed of the motor 6.

When the operation on / off button 14 is turned off, the control circuit 12 stops the output of the speed control signal 6c, and turns off the output port P0 to turn off the motor internal circuit power supply 6b after a certain period of time. To “L”.

As described above, after the apparatus is turned on by operating the power on / off button and before any one of the operation modes is selected by operating the operation mode selection button 15, the motor is operated. 6 has a motor power supply 6
a is supplied, and the motor internal circuit power supply 6b is not supplied. For this reason, the power consumption can be reduced as compared with the conventional case where the motor power supply 6a and the motor internal circuit power supply 6b are supplied to the motor 6 after the apparatus is turned on.

FIG. 8 is a diagram showing a configuration of a lamp drive circuit of the air cleaning device. As an example, the lamp drive circuit 29 that drives the power supply lamp 17 includes transistors 34 and 35. Based on a pulse signal output from the control circuit 12, the transistor 35 and the transistor 34 turn on in this order, and the transistor 34 turns on. During this time, 5 V DC power is supplied to the power lamp 17.

FIG. 9 is a timing chart of a pulse signal input to the lamp drive circuit. Control circuit 12
In the state where the speed control signal 6c is being output to the motor drive circuit 27, that is, in the state where the motor 6 is rotating, as shown in FIG. Output a signal. On the other hand, in a state where the speed control signal 6c is not output to the motor drive circuit 27, that is, in a state where the motor 6 is not rotating, as shown in FIG. Output a pulse signal.

Therefore, the cycle of the pulse signal output from the control circuit 12 to the lamp drive circuit 29 is 1/2 times when the motor 6 is rotating compared to when the motor 6 is not rotating. Become. Thus, the power consumption for turning on the power lamp 17 is reduced without significantly lowering the brightness of the power lamp 17 when the motor 6 is not rotating.

FIG. 10 is a timing chart of a drive signal for the gas sensor from the gas sensor drive circuit. As described above, the gas sensor drive circuit 28 drives the heater 8b constituting the gas sensor 8 based on the pulse signal output from the control circuit 12. When the power on / off button 14 is operated to the ON side and any operation mode is selected by operating the operation mode selection button 15, the control circuit 12 operates at 60 Hz until 5 seconds elapse. The on period of the pulse signal is 474 μ
sec, and thereafter, the ON period of the 60 Hz pulse signal is set to 400 μs until 10 seconds elapse.
ec to be higher than the ON period in the stable state. However, the value of the on-period is an example, and means that the value is higher than the stable state by a certain ratio.

As a result, the rise of the temperature of the heater 8b constituting the gas sensor 8 can be made steep,
The sensor unit 8a quickly becomes stable, and it is possible to detect the dirty state of the indoor air about 15 seconds after the timing when any one of the operation modes is selected by the operation mode selection button 15. For this reason, the dirt state of the indoor air can be accurately detected, and the standby time until the indoor state becomes stable can be shortened, and the power consumption can be reduced.

The control circuit 12 uses the detection signal of the sensor section 8a after the stable state as a reference value for judging the subsequent state of indoor air contamination. Thereafter, the control circuit 12
Has an on period of 400 μsec and an off period of 8.456
The pulse signal is output to the gas sensor drive circuit 28 as msec.

When the power on / off button 14 is turned off, that is, when no operation mode is selected, the control circuit 12 sets the on period for one minute every ten minutes. 400 μsec, 8.4 off period
A pulse signal of 56 msec is output to the gas sensor drive circuit 28. As a result, the operation mode selection button 1
Immediately after the operation of the air conditioner 5, the detection of the contamination state of the indoor air by the gas sensor 8 can be started,
It is possible to reduce the power consumption in a state in which the operation mode is waiting to be selected. Further, as the operation mode is not selected and the air cleaning operation is not performed, the time required for the sensor unit 8a to stabilize can be prevented from becoming longer.

In any one of the operation modes, when controlling the rotation speed of the motor 6 based on the detection result of the contamination state of the indoor air by the gas sensor 8, if the degree of contamination is low, the rotation of the motor 6 is stopped. You may make it.

When the rotation speed of the motor 6 changes frequently, the sensitivity of the gas sensor 8 can be reduced by operating the sensitivity switch 16.

[0039]

According to the present invention, the following effects can be obtained.

(1) By increasing the power supply to the gas sensor for a predetermined time immediately after the power supply to the device is turned on, the output value of the gas sensor can be stabilized quickly after the power supply to the device is turned on. State detection can be started early, and power consumption can be reduced.

(2) By supplying power to the gas sensor only at a predetermined time interval every predetermined time while the motor is stopped, the power supply time to the gas sensor when the motor is stopped is reduced, and the power is always supplied. Power consumption can be reduced as compared with the case.

(3) By not supplying power to the internal circuit of the motor while driving is stopped, power consumption can be reduced.

(4) Providing a fixed delay time between the ON / OFF of the power supply of the internal circuit of the motor and the output timing of the speed control signal, thereby making the operation of the internal circuit more reliable and safer. And the occurrence of abnormalities such as destruction of internal circuits can be prevented.

(5) By reducing the amount of power supplied to the display lamps when the motor is stopped, compared to when the motor is being driven, power consumption by the display lamps when the motor is stopped can be reduced. .

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a configuration of an air cleaning device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an operation panel of the air cleaning device.

FIG. 3 is a block diagram illustrating a configuration of a control unit of the air cleaning device.

FIG. 4 is a diagram showing a configuration of a motor drive circuit of the air cleaning device.

FIG. 5 is a diagram showing a configuration of a gas sensor of the air cleaning device.

FIG. 6 is a diagram showing a configuration of a gas sensor drive circuit of the air cleaning device.

FIG. 7 is a timing chart of signals output to the motor from the motor drive circuit.

FIG. 8 is a diagram showing a configuration of a lamp drive circuit of the air cleaning device.

FIG. 9 is a timing chart of a pulse signal input to the lamp drive circuit.

FIG. 10 is a timing chart of a drive signal for the gas sensor from the gas sensor drive circuit.

FIG. 11 is a side sectional view showing a configuration of a conventional air cleaning device.

[Explanation of symbols]

 1-Air Cleaner 2-Suction Port 3-Filter 5-Fan 6-Motor 7-Fan Scroll Casing 8-Gas Sensor 9-Rotation Detection Sensor 10-Operation Panel 11-Outlet 12-Control Circuit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mamoru Morikawa 22-22, Nagaikecho, Abeno-ku, Osaka City, Osaka F-term (reference) 3L060 AA03 CC08 CC13 DD01 DD04 EE05 EE45 4D058 JA12 NA01 NA07 NA08 QA03 QA21 UA05 UA06

Claims (5)

[Claims] 1. A gas sensor for heating a sensor unit for detecting a state of air contamination by a heater, a motor for supplying a rotational force to a fan disposed in an air flow path from an intake port to an air outlet through a filter through a filter, An air purifying apparatus including a power supply unit for supplying power to a gas sensor, a motor, and a display lamp, the display unit including a display lamp for displaying a power supply state in a power supply unit, An air purifier characterized by increasing a power supply amount. 2. The gas sensor according to claim 1, wherein power is supplied from a power supply unit for a predetermined period of time at predetermined time intervals when the driving of the motor is stopped, and a detection result during this period is compared with a detection result during driving of the motor. The air purifying apparatus according to claim 1, wherein 3. The air cleaning apparatus according to claim 1, wherein the motor shuts off a power supply of an internal circuit while the motor is stopped. 4. A fixed delay time is provided between the on / off timing of an internal circuit power supply and the output timing of a speed control signal when the motor starts and stops driving. An air purifier according to any one of claims 1 to 3. 5. The air purifying apparatus according to claim 1, wherein the power supply unit reduces the amount of power supplied to the display lamp while the driving of the motor is stopped.