JP2001062228A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the detection sensitivity of a cenesthesic sensor by recessing a concave cenesthesic sensor setting part in the outer face of a housing and providing the cenesthetic sensor almost in the center position of the setting part of cenesthesic sensor so as not to be projected outward from the peripheral part of the setting part. SOLUTION: A recess is provided almost in the center position of the operation panel 22 provided with a reset button 24, a button 28 for turning off a timer, a capacity switching button 29, a filter replacement indicating lamp 25, an electrode cleaning lamp 26, a timer-display LED 27, etc., and a cenesthesic sensor setting part 9 is formed in the central part of the front of a housing 4 in the width direction by the recess. The cenesthesic sensor 7 is furnished almost in the central part of the setting part 9 so that the sensor part 7a is not projected outward from the peripheral part of the setting part 9, namely from the front of the panel 22. Consequently, the detection sensitivity of the cenesthesic sensor 7 is enhanced, and an impact is prevented from acting directly on the cenesthesic sensor 7 when the air cleaner is turned over.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for purifying indoor air, and more particularly to an air purifier whose operation is controlled by a human sensor for detecting a person in an installation area. is there.

[0002]

2. Description of the Related Art As an air purifier, a human sensor for detecting a person in a predetermined area where the air purifier is installed, a dust sensor for detecting dust such as house dust and pollen, an odor component and a gas component, etc. Conventionally, a device provided with a gas sensor for detecting a gas is known. In this air purifier, the operating state is controlled by detecting a person in a predetermined area by a motion sensor, and based on a dust detection result by a dust sensor and a gas detection result by a gas sensor. The operating state is controlled. And the dust detection result by the dust sensor, the gas detection result by the gas sensor,
That is, a dirt display unit for displaying the degree of dirt of air is provided on the outer surface of the air purifier.

[0003] Air cleaners are generally installed on the floor or mounted on a wall, but the outer shape of the housing is generally rectangular when viewed from the front.
Depending on the installation location, it can be used vertically in a vertically long state or horizontally in a horizontally long state.

[0004]

However, in the conventional air purifier, no special consideration is given to increasing the detection sensitivity of the human sensor, and the sensitivity of the human sensor is insufficient. There was a problem.

[0005] In addition, no particular consideration is given to the mounting location of the dust sensor, and there is a problem that the accuracy of dust detection by the dust sensor is not sufficient.

Further, when the dirt display section is arranged and provided so that the dirt display section is located at the top when the air purifier is installed vertically, the dirt display section is installed when the air purifier is installed horizontally. May be located at the bottom, and in this case, there is a problem that the dirt display portion is difficult to see.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide an air purifier capable of increasing the detection sensitivity of a human sensor.
It is another object of the present invention to improve the accuracy of dust detection by a dust sensor, and to make it easier to see a dirt display portion in both vertical and horizontal installations.

[0008]

According to the first aspect of the present invention, there is provided an air purifier comprising: a housing having a suction port, a discharge port, and a wind tunnel formed between the housing; A fan block 5 arranged to take in outside air from the suction port 1 and discharge the air from the discharge port 2, a filter 6 for purifying the air taken in by the fan block 5, and a person who detects the presence of a human body in a predetermined area. In an air purifier provided with a sensation sensor 7 and control means for controlling an operation state of the fan block 5 based on an output of a detection result of the occupancy sensor 7, a concave curved occupancy sensor is provided on an outer surface of the housing 4. The installation portion 9 is formed in a concave shape, and the human sensor 7 is provided at a substantially central position of the human sensor installation portion 9 so as not to protrude outward from the peripheral portion of the human sensor installation portion 9. And it is characterized in Rukoto.

According to a second aspect of the present invention, there is provided the air purifier according to the first aspect, wherein the concave surface of the motion sensor installation section 9 is a spherical surface.

According to a third aspect of the present invention, in the second aspect, the ratio of the radius of curvature of the spherical curved surface of the motion sensor installation portion 9 to the maximum radius of the motion sensor is 5: 2. Is what you do.

According to a fourth aspect of the present invention, in the first to third aspects, there are provided a dust sensor 10 for detecting dust such as house dust and pollen, and a gas sensor 11 for detecting gas such as odor components and gas components. A dirt display unit 12 for displaying an output level of a detection result by at least one of the sensors 10 and 11, and the human sensor 7 and these two types of sensors 10 and 11 and the dirt display unit 12 are arranged on substantially the same straight line. It is characterized by comprising.

According to a fifth aspect of the present invention, in the fourth aspect, the dust sensor 10 is provided near the suction port 1.

According to a sixth aspect of the present invention, in the fourth and fifth aspects, the planar shape of the housing 4 is formed in a rectangular shape, and the longitudinal direction of the rectangular shape is changed to a vertical direction and a horizontal direction. 4 is formed so as to be installable, and when the housing 4 is installed in any one of these directions, the dust sensor 10 and
The gas sensor 11, the human sensor 7, and the dirt display unit 12 are arranged.

According to a seventh aspect of the present invention, the fan block 5 is driven based on the output of the detection result of the motion sensor 7, and then the fan block 10 is driven based on the output of the detection result of the dust sensor 10 and the gas sensor 11. The control means is formed so as to control the driving of the motor.

[0015]

Embodiments of the present invention will be described below.

The air purifier has a grill panel 17 detachably mounted on the front surface of a housing 4. Inside the housing 4, a sirocco fan for taking air into a wind tunnel 3 formed inside is provided. Fan block 5, motor 1 for rotationally driving the fan of fan block 5
6. A filter 6 for purifying air is stored. FIGS. 2 and 3 show a state in which the air purifier is placed in a vertical position. As shown in FIGS. 2 and 3, one side of a grill panel 17 constituting the front part of the housing 4 has a grid. Part 1
a is provided, and another lattice portion 1b is provided at the rear of one side surface portion of the housing 4, and these lattice portions 1a, 1
“b” is a suction port 1 into which air is sucked by driving the fan block 5. Further, another lattice portion 2a is provided on the other side surface portion of the housing 4, and this lattice portion 2a is the discharge port 2 from which the air purified by the filter 6 is discharged.

In the lattice portion 1b constituting the suction port 1 of the housing 4, there is provided a stand mounting portion 19 for mounting the stand 21 at the time of horizontal placement. As shown in FIG. 2A, the housing 4 is formed such that the outer shape in a front view is vertically elongated and the outer shape in a plan view is substantially rectangular in a vertically placed state.
1 and 2 can be used in a vertically long state by being installed vertically so that the longitudinal direction of the substantially rectangular shape is oriented in the horizontal direction as shown in FIGS. The stand 21 is attached to the mounting portion 19.
By being detachably attached, as shown in FIG. 5, the substantially rectangular shape can be used in a horizontally long state by being installed horizontally so that the longitudinal direction thereof is oriented in the vertical direction.

As shown in FIG. 4, a power supply circuit 39 is provided at a position corresponding to a lower portion in the housing 4 in a vertical position, and corresponds to an uppermost portion in the housing 4 in a vertical position. A control circuit board 40 is provided at the location.
The shape of the control circuit board 40 is substantially T-shaped so as to secure a maximum board space where the arrangement of the fan block 5 and the filter 6 is not affected. A cover member 4a is attached to the housing 4 so as to cover the periphery.

As shown in FIG. 4, a dust sensor mounting portion 49 is formed in the housing 4 on one side of the control circuit board 40 to detect dust such as house dust, pollen particles and dust. The dust sensor 10 is mounted on the dust sensor mounting portion 49. The dust sensor 10 is connected to the control circuit board 40 by a connector.

As shown in FIGS. 1 and 4, the control circuit board 40 includes a human sensor 7, a reset button 24, a filter replacement display lamp 25, an electrode cleaning lamp 26, a timer display LED 27, a timer off button 28, Gas sensor 11 for detecting gas such as odor component or gas component, for example, odor gas of cigarette, air volume switching button 29, operation mode display L
An ED 30 is disposed, and a dust sensor 1 is provided on an end of the control circuit board 40 opposite to the human sensor 7.
There is provided a dirt display section 12a including a dust dirt display section 12a for displaying the degree of dirt due to dust in the room detected by 0 and a gas dirt display section 12b for displaying the degree of dirt due to indoor gas detected by the gas sensor 11. . The dust stain display part 12a and the gas stain front part 12b are vertically arranged in parallel, and the dust stain display part 12a
Is formed of a display element having a decimal point in the first digit as a three-digit numerical display, and is expressed as 0.15 mg, 1.05 mg, 0.05
It is designed to display environmental standard dust concentration levels such as mg. The gas contamination display section 12a is a level display using an LED or the like. The dirt display section 12 composed of the dust dirt display section 12a and the gas dirt display section 12b is formed in a disk shape, and is rotatably inserted into the hole 70 of the control circuit board 40. These motion sensor 7, reset button 24, filter replacement display lamp 25, electrode cleaning lamp 26, LED 27 for timer display, timer off button 28,
Gas sensor 6, air volume switching button 29, operation mode display LE
D30, the dirt display unit 12 and the like are operated from the surface side of the cover member 4a, or are visually recognized, or are exposed on the surface of the cover member 4a so as to allow gas to pass therethrough, or are made light transmissive. Or gas permeable.

As shown in FIG. 2, a grill panel 17 is removably attached to the front opening of the housing 4. The opening 17a formed on the grill panel 17 so as to be positioned vertically above the grill panel 17 has a horizontally long opening. Translucent operation panel 2
2 is detachably attached. Thus, the operation panel 2
2, the dust sensors 10 arranged in a row at the top of the housing 4 in the vertical position.
And a cover member 4a that covers the control circuit board 40 and the dirt display unit 12, as shown in FIG.

Here, a slit-shaped hole 41 is formed at one end of the horizontally long operation panel 22.
Are arranged near the lattice portion 1 a constituting the suction port 1 provided in the grill panel 17. The hole 41 covers the front side of the dust sensor 10, so that the dust sensor 10 is provided near the suction port 1. By arranging the dust sensor 10 near the suction port 1 in this manner,
Dust, which is a pollutant such as house dust or pollen particles, riding on the air sucked into the suction port 1 can be attracted to the vicinity of the dust sensor 10, and the dust can be easily detected by the dust sensor 10.

A recess is provided at a substantially central portion in the vertical and horizontal directions of the horizontally long operation panel 22, and a hole 42 is formed at the bottom of the recess.
The human sensor 7 attached to the control circuit board 40 and exposed on the surface of the cover member 4a is disposed in the hole 42. The human sensor 7 is formed by an infrared sensor. When a human body is detected by the human sensor 7, a detection signal is sent to control means provided on the control circuit board 40 to start operation of the air purifier, Is controlled so that the operation of the air purifier is stopped when the sensing of the air is lost.
By arranging the human sensor 7 at a substantially central portion of the operation panel 22 (that is, a substantially central portion of the front surface of the air purifier in the width direction) in this manner, when the air purifier is installed vertically, the air purifier is positioned in the left-right width direction. When installed horizontally in the center, the human sensor 7 is located in the center in the vertical direction,
In any case, the detection of the human body can be performed with high accuracy.

Here, the reset button 24, the timer cut-off button 28, and the air volume switching button 29 can be operated by operation from the front side of the operation panel 22 (for example, a touch switch structure or the like). Lamp 25,
The electrode cleaning lamp 26, the timer display LED 27, and the dirt display unit 12 can be seen through at least a corresponding portion of the operation panel 22 by being transparent or translucent or by forming an opening so as to be visible from the front of the operation panel 22. .

When the filter replacement indicator lamp 25 is turned on, the reset button 24
By pressing, the light can be turned off. The electrode cleaning lamp 26 is the electrode cleaning lamp 2.
When the lamp 6 is turned on, the grill panel 17 is removed to clean the plasma electrode 37 provided therein.
6 is turned off automatically. The timer display LED 27 is for displaying the remaining time of the timer display time, and can be set by pressing the timer off button 28 so that the display of the remaining time of the timer operation time is (1, 2, 4, 8) → off. is there. By pressing the air volume switching button 29, the air volume can be switched by switching the operation mode in the order of automatic mode, silent operation mode, weak operation mode, standard operation mode, rapid operation mode, and off. These operation modes are the operation mode display L
The information is displayed on the ED 30. The timer and air volume switching can be operated with the attached remote controller.

The location where the small slit-shaped hole 43 is formed between the location where the timer cut-off button 28 of the operation panel 22 is operated and the location where the air volume switching button 29 is operated is the location corresponding to the gas sensor 11. is there. Since the gas sensor 11 detects a gas component having a relatively high diffusivity, even with a relatively small slit-shaped hole 43, the gas can easily pass and sufficient detection sensitivity can be obtained. Therefore, compared to the dust sensor 10 and the human sensor 7 described above, even if the air cleaner is disposed at a free position, the detection sensitivity is less affected. Therefore, the three types of sensors necessary for detecting dust, human feeling, and gas are arranged in a substantially straight line with the dust sensor 10, the human sensor 7, and the gas sensor 11 in order from the one closer to the lattice part 1a constituting the suction port 1. The dirt display section 12 is arranged on this straight line.

At the end of the operation panel 22 opposite to the dust sensor 10, a dust contamination level display section 12a for displaying the degree of contamination by dust detected by the dust sensor 10.
And a display section see-through section 51 corresponding to the dirt display section 12 composed of the gas dirt degree display section 12b for displaying the degree of gas dirt detected by the gas sensor 11, and the dirt display section 12 is seen through from the front. You can see it. The display section see-through section 51 corresponding to the dirt display section 12 is located at the end of the air cleaner opposite to the side where the stand mounting section 19 at the time of the above-mentioned horizontal installation is provided. Thus, when the air purifier is placed horizontally, the dirt display unit 12 and the display unit see-through unit 51 can be arranged above the air purifier.

As described above, the dirt display section 12 is disposed above the air purifier when the air purifier is placed vertically or when the air purifier is placed horizontally. The display of the section 12 can be made easier to see, and by turning the dirt display section 12, the case of FIG. 2 in which the air purifier is placed vertically or FIG. As in the case, the characters displayed on the dirt display section 12 can be turned upside down in any state, and the display on the dirt display section 12 can be easily viewed. The stand 21 is attached to the housing 4 of the air purifier so that the stand 21 can be used vertically or horizontally as shown in FIGS. The air purifier can also be used in a vertical or horizontal state as a wall-mounted specification by attaching a wall mounting bracket or the like to the back surface.

Next, the internal structure of the air purifier will be described with reference to FIG. The fan block 5 housed in the wind tunnel 3 of the housing 4 is made of a sirocco fan, and when described in a vertically installed state, air flows into the wind tunnel 3 from the suction port 1 composed of lattice portions 1a and 1b provided on the front and one side. Is sucked out and blown out in the centrifugal direction to discharge air from a discharge port 2 formed of a lattice portion 2a on the other side of the housing 4.

An aluminum insert boss 33 is provided inside the sirocco fan constituting the fan block 5, and an extension shaft 34 is inserted therein. Extension shaft 34
The fan 1 and the fan 1 are fastened and fixed by using screws such as threaded screws. Two sirocco fans are provided as a double sirocco fan. Both ends of the extension shaft 34 are held by bearings 35 and a coupling 36
And is fixedly connected to the motor shaft 16a of the motor 16 with a screw such as a set screw. An air purification filter 6 is housed in the wind tunnel section 3 on the upstream side of the flow of the wind to the fan block 5 in the housing 4. The filter 6 is, for example, a plasma filter (plasma hepa filter). It has a plasma deodorant and activated carbon inside. A plasma electrode section 37 is provided upstream of the filter 6, and a pre-filter 38 is provided upstream of the plasma electrode section 37.

Then, by rotating the sirocco fan of the fan block 5, air is sucked from the suction port 1 composed of the lattice portions 1a and 1b, and the pre-filter 38,
The filter 6 purifies the air, and discharges the purified air from the discharge port 2, thereby creating indoor circulating air and purifying the indoor air.

FIG. 6 is a block diagram of a control circuit mounted on a control circuit board 40. The control circuit includes a microcomputer 8 which forms control means, a switch of a reset button 24 provided on an operation panel 22, and a timer. An operation unit 44 including a switch of the cutoff button 28 and a switch of the air volume switching button 29 is connected to the microcomputer 8. The outputs of the human sensor 7, the dust sensor 10, and the gas sensor 11 are also input to the microcomputer 8. Filter replacement lamp 25, electrode cleaning lamp 2
6. LED 27 for timer display, LE for operation mode display
D, the dirt display sections 12a and 12b constitute a display block 45, and the display block 45 is also connected to the microcomputer 8. Further, the microcomputer 8 has a function of controlling the motor 16. Power is supplied to the motor 16 and the microcomputer 25 from a power supply circuit 46 that generates a DC power supply by rectifying and stabilizing a commercial power supply. A high voltage applied to the plasma electrode 37 receives an output of the power supply circuit 46 and receives a high-voltage power supply. 47
Is generated.

Next, the human sensor 7 will be described in more detail. As described above, a concave portion is provided at a substantially central portion of the operation panel 22, and the human sensor installation portion 9 is formed at the central portion of the front surface of the housing 4 in the width direction. The concave shape of the human sensor installation portion 9 is formed in a concave curved shape, and is particularly preferably formed in a spherical curved concave shape. The motion sensor 7 is provided so that the sensor portion 7a does not protrude outward from the periphery of the motion sensor installation portion 9, that is, does not protrude from the front surface of the operation panel 22. It is provided at a substantially central position. In this manner, by forming the human sensor installation section 9 in a concave curved shape, infrared rays can be collected by the human sensor installation section 9 and received by the sensor section 7a of the human sensor 7, and the detection sensitivity can be improved. Can be enhanced. In particular, if the human sensor installation section 9 is formed into a concave curved surface with a spherical curved surface, infrared rays can easily enter the human sensor installation section 9, so that the detection sensitivity can be further enhanced. In addition, since the human sensor 7 does not protrude outward from the peripheral edge of the human sensor installation part 9, it is possible to prevent a direct impact on the human sensor 7 when the air purifier falls. This can prevent the human sensor 7 from being damaged.

When the human sensor installation section 9 is formed into a concave curved surface of a spherical surface, the radius of curvature r ₁ of the spherical surface of the human sensor installation section 9 (for example, the radius of curvature r ₁ = 15 mm) is obtained.
The ratio of the outer radius of the sensor unit 7a of the human sensor 7 to the maximum radius r ₂ (for example, the diameter r ₂ = 12 mm) is about 5:
It is preferable to be configured to be 2. In general, the maximum angle of the detection area of the motion sensor 7 such as the “Napion sensor” manufactured by Matsushita Electric Works is about 50 ° left and right, but by setting this ratio to about 5: 2, the detection area of about 50 ° left and right is obtained. Can be just satisfied, and a wide detection range can be ensured, and high detection accuracy can be obtained.

The human sensor 7 has a function of generating an output signal in the form of a pulse when receiving infrared rays. When an input signal of 5 V DC is given, a pulse signal is generated according to the movement of a heat object such as a person. Is issued. This pulse signal is taken as a sensing signal into control means formed by a CPU or the like provided on the control circuit board 40 and used as a control signal.

Then, when a heat object such as a human body enters a predetermined area in the room where the air purifier is installed and can be detected by the human sensor 7, and when it is detected by the human sensor 7, the sensing signal is sent to the control means. The motor 16 is sent to drive the fan block 5 to start the operation of the air purifier. Here, when the human body or the like is detected by the human sensor 7 and the operation of the air purifier is started, first, the control means is set so that the operation mode is the silent operation mode and the operation is performed with the weakest airflow. It is. At this time, lighting of the operation mode display LED 30 indicates that the operation mode is the silent operation mode. When the fan block 5 is operated so as to have the weakest air volume, the gentle wind blows the air from the suction port 1 and discharges the air from the discharge port 2, thereby generating a gentle circulating wind in the room. I do. The circulating wind serves to bring dust and other dust and odor and other gases in the room to the air purifier and induce them. For this reason, the accuracy and sensitivity of detecting dust in the room with the dust sensor 10 and the indoor gas The gas sensor 11
The detection accuracy and sensitivity are increased, and these detections can be performed accurately. After the silent operation mode has been performed for a predetermined time, the dust sensor 1
0 and based on the output of the detection result of the gas sensor 11,
The control means is set to control the operation of the fan block 5. That is, the operation of the fan block 5 is controlled by the control means in accordance with the detected amount of dust or gas, and the operation of the air purifier can be continued while adjusting the air flow in accordance with the detected amount of dust or gas. is there.

Next, the dust sensor 10 will be described in detail. FIG. 7 shows an example of the dust sensor 10, in which a shield case 54 covers an outer surface of a main body casing 53 having a built-in detection mechanism (not shown) including a light emitting unit and a light receiving unit. 55 and an outlet 56 are provided. In FIG. 7, reference numeral 57 denotes a circuit block. And air flows in 5
5 and exits from the outlet 56 as indicated by the arrow. When the air passes through the dust sensor 10, the light emitting unit and the light receiving unit detect and measure the amount of dust in the air. Is issued.

As described above with reference to FIG. 4, this dust sensor 10 is used by being attached to a dust sensor attachment portion 49 formed at the position adjacent to the control circuit board 40 in the housing 4 so as to open to the front side. You. FIG. 8 shows the details, and the dust sensor 10 is fitted and mounted in the dust sensor mounting portion 49 so that the inflow port 55 faces the front side, and the slit-shaped hole portion 58 is provided.
Is attached to the front of the dust sensor mounting portion 49 so as to cover the front surface of the dust sensor 10. Between the back surface of the dust sensor 10 and the back surface of the dust sensor mounting portion 49, the dust sensor mounting portion 4 is provided.
The air passage 61 is formed by the spacer pieces 60 protruding from 9. The air passage 61 extends below the dust sensor 10 and communicates with the wind tunnel 3 having the filter 6 and the fan block 5.

The rotation of the fan block 5 causes the air in the room to be sucked in from the suction port 1. At this time, as described above, the dust in the room rides on the air sucked into the suction port 1 and the dust sensor 10 Although attracted to the vicinity, as shown by an arrow in FIG. 8, the suction force caused by the rotational drive of the fan block 5 flows into the dust sensor 10 from the inlet 55 through the hole 58 of the sensor cover 59, and the outlet 55. Flows into the air passage 61 and moves into the wind tunnel portion 3.
The dust attracted near the dust sensor 10 surely passes through the dust sensor 10 riding on the flow of the air, and the dust in the room can be detected by the dust sensor 10 with high sensitivity.

FIG. 9 shows another embodiment of mounting the dust sensor 10. In this embodiment, the dust sensor 10 is mounted so as to be fitted into the dust sensor mounting portion 49 so that the inflow port 55 faces outward. The inlet 55 is provided at the suction port 1 on one side of the housing 4.
It is made to face. Dust sensor mounting part 49
Sensor cover 59 having a hole 58 on the side
Is attached. An air passage 61 is formed between the back surface of the dust sensor 10 and the side of the dust sensor mounting portion 49, and the air passage 61 is formed in the wind tunnel 3
Is communicated to. In this case, the suction force caused by the rotational drive of the fan block 5 flows into the dust sensor 10 from the inflow port 55 through the suction port 1 of the housing 4 or the hole 58 of the sensor cover 59 as shown by an arrow in FIG. At the same time, the air flows out of the outlet 55 to the air passage 61 and moves into the wind tunnel 3, and the dust attracted near the dust sensor 10 rides on the air flow to generate the dust. The dust passes through the sensor 10 reliably, and dust in the room can be detected with high sensitivity by the dust sensor 10.

[0041]

As described above, the air purifier according to the first aspect of the present invention has a housing having a suction port, a discharge port, and a wind tunnel formed between the two, a housing disposed in the wind tunnel, and a suction port. A fan block that takes in outside air from the mouth and discharges it through the outlet, a filter that purifies the air taken in by the fan block, a human sensor that detects the presence of a human body in a predetermined area, and the detection results of the human sensor An air purifier provided with control means for controlling the operating state of the fan block based on the output of the housing. A concave curved human sensor is provided so that it does not protrude outward from the peripheral edge of the human sensor installation part, so that it is installed at the approximate center of the human sensor installation part. The infrared light is collected by the mounting part and can be received by the human sensor located at the approximate center of the infrared ray, and the detection sensitivity of the human sensor can be increased, and when the air purifier falls down, It is possible to prevent a shock from directly acting on the human sensor stored in the human sensor installation portion, and to prevent damage to the human sensor.

According to the second aspect of the present invention, since the concave surface of the human sensor installation portion is formed into a spherical surface, infrared rays can easily enter the human sensor installation portion, and the detection sensitivity of the human sensor can be further increased. Can be done.

According to the third aspect of the present invention, since the ratio of the radius of curvature of the spherical surface of the human sensor installation portion to the maximum radius of the human sensor is 5: 2, the detection range of the human sensor can be widened. It is possible to secure the detection accuracy and to obtain high detection accuracy.

According to a fourth aspect of the present invention, there is provided a dust sensor for detecting dust such as house dust and pollen, and a gas sensor for detecting gas such as odor components and gas components. The dirt display section that displays the output level is provided, and the human sensor and these two types of sensors and the dirt display section are arranged on substantially the same straight line, so each sensor and dirt display section are concentrated on a straight line. Is what you can do.

According to the fifth aspect of the present invention, since the dust sensor is provided near the suction port, the dust sucked into the suction port can attract the dust to the vicinity of the dust sensor. Can be detected with higher accuracy.

According to a sixth aspect of the present invention, the planar shape of the housing is formed in a rectangular shape, and the housing is formed so that the longitudinal direction of the rectangular shape can be set vertically and horizontally. When the air cleaner is installed in one of these orientations, the dust sensor, gas sensor, human sensor, and dirt display are arranged so that the dirt display is located at the top. Whether you use it or use it in a horizontal position,
The dirt display section is located at the top, and can make the dirt display section easier to see.

The invention according to claim 7 drives the fan block based on the output of the detection result of the human sensor,
Then, to control the drive of the fan block based on the output of the detection result of the dust sensor and the gas sensor,
Since the control means is formed, when the human body is detected by the human sensor, first, the fan block is driven to cause the air to be sucked in and discharged, thereby generating a circulating wind in the room, and dust and gas are generated by this circulating wind. It can be carried to an air purifier to be attracted, and the detection accuracy of the dust sensor and gas sensor can be increased.Then, based on the detection results of the dust sensor and gas sensor, the amount of dust and gas detected The operation of the air purifier can be continued while adjusting the air flow according to the air flow.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention,
(A) is a partial front view, (b) is a partial cross-sectional view, (c)
Is a partial plan view.

FIGS. 2A and 2B show a vertically placed state of the above, where FIG. 2A is a plan view and FIG. 2B is a front view.

FIGS. 3A and 3B show a vertically placed state of the above, where FIG. 3A is a left side view and FIG. 3B is a right side view.

FIG. 4 is a front view showing a state where the grill panel is removed.

FIG. 5 is a front view showing the same horizontal state.

FIG. 6 is a block diagram of a control unit according to the embodiment.

FIGS. 7A and 7B show an example of the above dust sensor, in which FIG. 7A is a front view, FIG. 7B is a plan sectional view, and FIG. 7C is a side sectional view.

FIGS. 8A and 8B show a mounting state of the dust sensor of the above, wherein FIG. 8A is a partial front view, and FIG.
It is sectional drawing in a line.

9A and 9B show another example of the mounting state of the above dust sensor. FIG. 9A is a partial front sectional view, and FIG. 9B is a sectional view taken along line AA of FIG. 9A. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Wind tunnel 4 Housing 5 Fan block 6 Filter 7 Human sensor 9 Human sensor installation part 10 Dust sensor 11 Gas sensor 12 Dirt display part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takayuki Nakata 1048, Kazuma Kadoma, Kadoma, Osaka Prefecture Inside the Matsushita Electric Works Co., Ltd. Terms (Reference) 4D058 NA10 TA07 UA25 UA30

Claims (7)

[Claims] 1. A housing having a suction port, a discharge port, and a wind tunnel formed therebetween, a fan block provided in the wind tunnel to take in outside air from the suction port and discharge the air from the discharge port, and a fan block. A filter for purifying the air taken in, a human sensor for detecting the presence of a human body in a predetermined area, and control means for controlling the operation state of the fan block based on the output of the detection result of the human sensor. In the air purifier provided, a concavely-curved motion sensor installation portion is formed by recessing the outer surface of the housing so that the motion sensor does not protrude outward from the periphery of the motion sensor installation portion. An air purifier characterized by being provided at a substantially central position of a human sensor installation portion. 2. The air purifier according to claim 1, wherein the concave surface of the human sensor installation portion is a spherical surface. 3. The air purifier according to claim 2, wherein the ratio of the radius of curvature of the spherical surface of the motion sensor installation portion to the maximum radius of the motion sensor is 5: 2. 4. A dirt which includes a dust sensor for detecting dust such as house dust and pollen, and a gas sensor for detecting gas such as odor components and gas components, and displays an output level of a detection result by at least one of the sensors. The air purifier according to any one of claims 1 to 3, wherein a display unit is provided, and the human sensor, the two types of sensors, and the dirt display unit are arranged on substantially the same straight line. 5. The air cleaner according to claim 4, wherein the dust sensor is provided near the suction port. 6. A flat shape of the housing is formed in a rectangular shape, and a longitudinal direction of the rectangular shape is vertical.
The housing can be installed in a horizontal orientation, and the dust sensor, gas sensor, human sensor, and dirt indicator can be positioned so that when the housing is installed in one of these orientations, the dirt indicator is located at the top. The air purifier according to claim 4, wherein the air purifiers are arranged. 7. A control means for driving the fan block based on the output of the detection result of the human sensor and then controlling the drive of the fan block based on the output of the detection result of the dust sensor and the gas sensor. The air purifier according to any one of claims 4 to 6, wherein the air purifier is formed.