JP2604184B2 - Air cleaner - Google Patents

Description

The present invention relates to an air purifier that detects a person using a room and purifies air in a room whose operation is controlled.

(B) Prior Art As a prior art of the present invention, there is an air purifier described in Japanese Utility Model Laid-Open Publication No. Sho 61-86627 which controls the operation by detecting the presence of a person in a room.

The air purifier described in the above-mentioned publication detects the movement of a person in the room, starts the initial operation, and performs control to stop the operation when the movement of the person is not detected. However, simply detecting the movement of a person and stopping the operation does not automatically perform the operation to the point where the ability of the air purifier is sufficiently used to give an optimal state to the user.

(C) Problems to be Solved by the Invention It is a technical object of the present invention to provide an air purifier capable of performing control according to the situation of a person.

(D) Means for Solving the Problems The present invention solves the problems by means for changing the operation capability of the air purifier based on the detection frequency of a human detection unit that detects the movement of a person in a room. .

The human detection unit is formed by a pyroelectric infrared sensor, detects infrared rays generated by a human near 9 to 10 μm, and detects the presence of the human motion. Further, an ultrasonic sensor may be used as the human detection unit, and the movement of a person may be detected by the Doppler effect of ultrasonic waves reflected and returned to a moving person.

The detection frequency by the human detection unit indicates the number of detections by the human detection unit.
It indicates that the movement of people is so active.

The operating capacity of the air purifier means, for example, a change in the operating speed of the blower.

(E) Function In the present invention, the capacity of the air purifier changes according to the situation of the person using the room. For example, when a person moves actively, the number of detections by the person detection unit increases, the air is contaminated by the movement of the person, and the blower of the device is operated at a high speed.

(F) Example The present invention will be described by embodying a configuration based on an example.

The air purifier 1 has an external appearance as shown in the perspective view of FIG. 2, in which an intake grill 2 is formed on the front surface in FIG. A dust filter 4 is provided in the main body 9 of the intake grill 2, and the air sucked from the intake grill 2 passes through the high voltage application unit 5 on the way to the dust filter 4 to remove dust contained therein. The dust is collected electrically and mechanically when charged and passes through the dust collection filter 4. The clean air that has passed through the dust collection filter 4 is sent by a blower blade 7 driven by a motor 6 and blown out of the blowout grill 3. Before being blown out from the blowout grill 3, it passes through the anion generator 8 and is ionized.

On the other half of the upper surface of the main body 9, an operation unit 11 having a key input unit 10 and a human detection unit 12 for raising and rotatably supporting are formed. The air purifier 1 can be mounted on a wall with the blow grill 3 down, and in this case, the operation unit 11 is
It can be taken out and attached to an easy-to-operate portion of the wall. The human detection unit 12 can adjust the rotation and elevation in the range of 30 degrees upward, 90 degrees downward, and 160 degrees each in the left and right direction, and the detection range as the human detection unit 12 is about 80 degrees left and right and about 22 degrees up and down Can detect people moving within 5m.

The circuit of the air purifier 1 is configured as shown in the block diagram of FIG. 3, and the control unit 13 performs various arithmetic processing based on signals from various inputs and then performs appropriate output control. Is formed. The input unit is shown on the left side of the control unit 13, and the output unit is shown on the right side.

The input unit includes a human detection unit 12, a power supply unit 15, a reset unit 16, a constant voltage unit 17 for the human detection unit 12, a key input unit 10, an oscillation unit 18, and the like. The output section is a high-voltage driver section 19, a high-voltage generation section 20, a motor driver section 21, a first LED display section 22, and a second LED display section.
23 and buzzer 24 etc. The human detection unit 12 includes an infrared sensor unit 25 and an Amp & detection unit 26. Infrared sensor unit 25
Detects far-infrared rays emitted from the human body with an infrared sensor and detects that a human has moved. The amp & detection unit 26 outputs a very small voltage from the infrared sensor unit 25, amplifies the voltage, discriminates it from the noise level, detects a signal component due to human movement, and outputs the detected signal to the control unit. .
The power supply unit 15 is a constant voltage output power supply to be supplied to each circuit. The reset unit 16 resets the power of the control unit 13.
In the constant voltage section 17, since the signals handled by the infrared sensor section 25 and the Amp & detection section 26 are very small signals, very stable power is required as a power supply to these circuits.
The power supply once stabilized by the power supply unit 15 is converted into a voltage again to provide a highly accurate power supply. The key input unit 10 is a switch input unit for various operations. The oscillating unit 18 supplies a system clock to the microcomputer that is the main unit of the control unit 13.

The high-voltage driver section 19 turns on / off the high-voltage generation section by a signal from the control section 13.The signal is optically coupled by a photocoupler and is controlled in a form electrically insulated from the high-voltage generation section 20. . The high voltage generating section 20 generates a high voltage applied to the high voltage applying section 5 and the anion generating section 8. The motor driver 21 turns on / off the motor 6 that drives the blower blades 7
In addition, switching of the number of rotations is performed by a triac SW, and in this structure, switching control of stop, weak operation, and strong operation is performed. The first LED display unit 22 drives the LED display by the motor driver unit 21 and displays the air volume switching by the blower blade 7. The second LED display unit 23 displays an operation state (manual / auto), setting of a timer, contamination of remaining air, and ON / OFF of the watching mode. The buzzer 24 emits a confirmation sound at the time of SW reception by the key input unit 10 and a human detection sound at the time of the miri mode.

FIG. 1 is a flowchart showing the circuit operation of the air purifier 1 using the present invention and the operation as a device. When the automatic operation of operating the air purifier 1 by detecting the movement of a person by the human detection unit 12 is selected, a one-minute timer starts, and the number of detections detected by the human detection unit 12 in one minute is counted. The counted number is discriminated, and if it is 0, the process returns to the initial state and the counting for one minute is performed again. If it is 1 to 4 times, select weak driving, if 5 or more times, select strong driving,
Start the 20-minute timer and run in the selected mode for 20 minutes. After detecting the 1 minute timer in parallel during the 20 minute timer count, the human detection section
The number of movements of the person by 12 is counted, and if there is a count, the timer is reset for 20 minutes, and it is discriminated whether it is 1-4 times or 5 times again, and the mode to be operated is selected again. If there is no detection by the human detection unit 12 for 20 minutes, the operation is stopped and returns to the initial state, the detection by the human detection unit 12 is performed every minute, and the above operation is repeated.

FIGS. 4 and 5 are flowcharts showing another structure different from FIG. 1 used in the air cleaner 1 shown in FIGS. 2 and 3 and will be described below with reference to each flowchart.

The main operation of the operation of the air purifier 1 in FIG. 4 is the same as that of the flowchart shown in FIG. However, while the timer operation control after selecting the operation mode as the strong operation and the weak operation is 20 minutes timer and fixed time in FIG. 1, the _TL timer, the _TH timer and the time of which was made different in length, in which a longer T _H timer during operation strength than T _L timer at the time a weak operation. Human detector 12
If the number of detections is large, or it is determined that the person has moved well, and the indoor air is determined to be dirty, control is performed such that the vehicle is driven for a long time with strong driving.

The operation of the air purifier 1 according to the flowcharts shown in FIGS.
If it changes in a shorter time within 20 minutes, the selective shift to strong operation and weak operation will be performed frequently. Therefore, the control according to the flowchart shown in FIG. 5 is to give priority to the operation by the 20-minute timer. When weak operation or strong operation is selected, the 20-minute timer starts, and the motor is operated in the selected operation mode without change for 20 minutes. The detection by the human detection unit 12 is counted during the counting of the 20-minute timer. If the detection is not performed by the human detection unit 12 after the expiration of the 20-minute timer, the detection is stopped. If the detection is detected, the 1-minute timer is started to detect the human. The detection count by the unit 12 is performed to determine the selection of the operation mode.

As in the above embodiment, the detection by the human detection unit 12 detects the movement of a person and counts the number of movements. Even if the air becomes dirty in proportion to the movement of the person, it can purify the air accordingly. It is like that.

The present invention is not limited to the above-described structures, but can be implemented with various structures.

(G) Effects of the Invention The present invention focuses on the fact that dirt in the air is closely related to the degree of movement of a person, such that dirt increases as the movement of a person increases. Since the degree is detected by the human detection unit and the operation capability of the air purifier is changed according to the detection frequency, the air purifying action suitable for the use condition of the room can be performed.

[Brief description of the drawings]

Figures show the invention, Figures 1 to 3 show one structure,
1 is a flowchart, FIG. 2 is a perspective view, FIG. 3 is a block diagram, and FIGS. 4 and 5 are flowcharts showing different structures. 1 ... air purifier, 12 ... human detection unit.

Claims (1)

(57) [Claims] 1. An air purifier wherein the operation capability of the air purifier is changed based on the detection frequency of a person detecting unit for detecting the movement of a person in a room where the air purifier is installed.