阅读说明：本技术 移动式空气净化器 (Movable air purifier ) 是由 网野梓 京谷浩平 小谷正直 大平昭义 佐野健太郎 于 2020-01-21 设计创作，主要内容包括：本发明的移动式空气净化器(1)包括：车轮(9s1、9s2),对车轮(9s1、9s2)进行驱动的驱动用电动机(9m1、9m2),用于除去从进风口(2i)吸入的室内的空气中的尘埃的过滤器(3),设置在通过过滤器(3)后的空气的气流的下游侧的风扇(6),用于排出除去了尘埃的空气的出风口(2o),对驱动用电动机(9m1、9m2)进行控制的控制装置(5a),判断是处于第一模式还是第二模式的判断单元(11a),和在所述第二模式时将驱动用电动机(9m1、9m2)的最大推进力,设定为比所述第一模式时的驱动用电动机(9m1、9m2)的最大推进力小的规定的推进力的推进力设定单元(12b)。(The mobile air purifier (1) of the invention comprises: wheels (9s1, 9s2), drive motors (9m1, 9m2) for driving the wheels (9s1, 9s2), a filter (3) for removing dust from indoor air sucked from the air inlet (2i), a fan (6) disposed downstream of the air flow passing through the filter (3), an air outlet (2o) for discharging the air from which the dust has been removed, a control device (5a) for controlling the drive motors (9m1, 9m2), a determination means (11a) for determining whether the mode is the first mode or the second mode, and a propulsion force setting means (12b) for setting the maximum propulsion force of the drive motors (9m1, 9m2) to a predetermined propulsion force that is smaller than the maximum propulsion force of the drive motors (9m1, 9m2) in the first mode.)

1. A mobile air purifier, comprising:

a wheel for moving the housing;

a drive motor for driving the wheel;

a filter disposed in the housing and configured to remove dust from indoor air sucked from the air inlet;

a fan disposed on a downstream side of an air flow of the air having passed through the filter;

an air outlet for discharging the air from which the dust is removed;

a control device for controlling the drive motor;

a determination unit that determines whether the vehicle is in a first mode or in a second mode in which an operating noise is smaller than that in the first mode; and

and a propulsion force setting unit that sets a maximum propulsion force of the drive motor to a predetermined propulsion force that is smaller than the maximum propulsion force of the drive motor in the first mode in the second mode.

2. The mobile air purifier of claim 1, comprising:

a human body detection unit for detecting whether a person is present;

the user reminding unit is used for reminding people of paying attention; and

a lighting control unit that lights the user reminding unit when a person is detected in the second mode.

3. The mobile air purifier of claim 1, wherein:

the predetermined propulsive force is set to be smaller than the propulsive force capable of passing over the predetermined step.

4. The mobile air purifier of claim 1, comprising:

a human body detection unit for detecting whether a person is present;

the user reminding unit is used for reminding people of paying attention; and

a lighting control unit that blinks or lights the user reminding unit when a person is detected in the second mode,

the user reminding unit is arranged on the lower surface or the downward surface of the vehicle body.

Technical Field

The present invention relates to a mobile air purifier.

Background

The existing placing type air purifier is fixedly arranged, so that the part where the air in the room is not smooth cannot be purified, and the power consumption can be increased in order to purify the part where the air is not smooth.

In contrast, the mobile air cleaner can be moved to a dirty air area in a home to clean the air. That is, the mobile air purifier can perform purification of a larger space by moving between rooms.

Moreover, the mobile air purifier can be moved to the place where the air is dirty at home for purification, so that the air purifier has the advantages of small air volume and silence for purification.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-

Patent document 2: japanese laid-open patent publication (JP 2015-181778, paragraph 0031, etc.)

Patent document 3: japanese patent laid-open publication No. 2013-230294 (paragraphs 0044 to 0046, FIG. 5, etc.)

Disclosure of Invention

Technical problem to be solved by the invention

The mobile air purifier sometimes works when a user is asleep. A mode in which the mobile air purifier operates while the user is asleep is referred to as a sleep mode.

In the sleep mode, a vibration sound is generated when the mobile air purifier crosses over a cable or runs on a carpet. Since the user is sleeping, the user sometimes feels a vibration sound as noise.

Also, in the sleep mode, the mobile air purifier travels in a dark environment where the lighting is turned off, so there is a risk of colliding with a user who travels indoors.

Patent document 1 describes a technique of reducing the volume and the amount of exhaust air generated by the sweeping robot when the user adopts a silent mode (sleep mode) setting.

It is described therein that, as the user preset mode, when the user sets "cleaning at bedtime is permitted (silent mode)", the cleaning robot automatically determines that the user is sleeping when the lighting of the room is off at night, and automatically sets the state to the silent mode.

Patent document 2 describes that, when "night" and "environment is dark", since there is a high possibility that a person is sleeping, the operation mode is set to "quiet" and the message volume is set to "low".

Patent document 3 describes that when the autonomous traveling vacuum cleaner senses a person in the proximity range using a human body sensor or the like, the operation mode is switched to the silent mode.

However, patent documents 1 to 3 describe the contents of the sleep mode of the mobile air purifier, but do not describe the sound generated during the sleep mode.

Further, patent documents 1 to 3 do not describe a structure for notifying the presence of the portable air cleaner in the sleep mode.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a portable air cleaner capable of suppressing a sound generated during a sleep mode.

Means for solving the problems

In order to solve the above problems, a mobile air cleaner of the present invention includes: a wheel for moving the housing; a drive motor for driving the wheel; a filter disposed in the housing and configured to remove dust from indoor air sucked from the air inlet; a fan disposed on a downstream side of an air flow of the air having passed through the filter; an air outlet for discharging the air from which the dust is removed; a control device for controlling the drive motor; a determination unit that determines whether the vehicle is in a first mode or in a second mode in which an operating noise is smaller than that in the first mode; and a propulsion force setting unit that sets a maximum propulsion force of the drive motor to a predetermined propulsion force that is smaller than the maximum propulsion force of the drive motor in the first mode in the second mode.

Effects of the invention

The invention can provide a mobile air purifier capable of inhibiting sound in sleep mode.

Drawings

Fig. 1 is a perspective view of a mobile air purifier according to an embodiment of the present invention.

Fig. 2 is a top view of an embodiment of a mobile air purifier.

Fig. 3 is a cross-sectional view taken along line I-I of fig. 2.

Fig. 4A is a side view of an embodiment of a mobile air purifier.

Fig. 4B is a sectional view II-II of fig. 4A.

Fig. 4C is a cross-sectional view III-III of fig. 4A.

Fig. 5 is a rear view of the mobile air purifier.

Fig. 6 is a lower perspective view of the mobile air purifier.

Fig. 7 is a block diagram of a control structure of the mobile air purifier.

Fig. 8 is a graph showing the change over time in the driving propulsive force when the mobile air cleaner crosses over a step.

Fig. 9 is a diagram showing the temporal change in the driving propulsive force when the maximum driving propulsive force is restricted by the portable air purifier when it is set to the sleep mode.

Fig. 10 is a schematic view of left and right wheels of the mobile air cleaner when crossing steps.

Fig. 11 is a flowchart of the walking control of the mobile air purifier in the sleep mode.

Fig. 12 is a control flow of the user reminding unit in the sleep mode.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings as appropriate.

Fig. 1 shows a mobile air cleaner 1 according to an embodiment of the present invention.

Fig. 2 shows a plan view of the mobile air cleaner 1 of the embodiment.

Fig. 3 shows the section I-I of fig. 2.

The mobile air purifier 1 of the embodiment of the present invention includes a normal mode (first mode) and a sleep mode (second mode).

The normal mode is a mode in which air is purified while walking in daytime.

The sleep mode is a mode in which the rotation speed of the fan (centrifugal impeller 6) is reduced to purify air at night when the user sleeps.

In the sleep mode, the mobile air cleaner 1 travels so as to avoid the steps in order to suppress the vibration sound of the vehicle body when passing the steps. Specifically, the maximum value of the driving propulsive force of the traveling wheels is restricted in the sleep mode so that the traveling wheels cannot climb up the steps.

Since the operation noise, that is, the vibration sound is suppressed by suppressing the sound of the fan, it may not be easy to know where the mobile air cleaner 1 is located in the room. Therefore, a reminder unit 11c (fig. 6) that reminds the user of the attention is mounted. When a person approaches in the sleep mode, a user reminding unit (such as an LED) is made to flash or light up to remind the user of paying attention.

As shown in fig. 1 and 2, the mobile air cleaner 1 has a vehicle body 1H having a substantially cylindrical shape.

As shown in fig. 3, a vehicle body 1H of the portable air cleaner 1 includes an air blowing unit 1w, a traveling unit 1r, a filter 3, sensors (11b, 11d), a user warning unit 11c, a control circuit board 5a, a battery 5b, and a cover 2 that covers them.

An upper cover 2f is attached to the upper surface of the housing 2 to be freely opened and closed.

When replacing the filter 3, the upper cover 2f can be opened, and the filter 3 can be lifted by holding the filter handle 3h (fig. 3).

As shown in fig. 1 and 2, a vehicle body air inlet 2i is provided on the upper side surface of the outer cover 2 over the entire circumference. The vehicle body air intake 2i may also be provided at a portion of the side of the mobile air cleaner 1.

Fig. 4A shows a side view of the mobile air purifier 1, fig. 4B shows a section II-II of fig. 4A, and fig. 4C shows a section III-III of fig. 4A.

As shown in fig. 4C, a vehicle outlet 2o is provided at a lower portion of the vehicle body 1H.

As shown by an arrow α 1 in fig. 3, the air inlet 2i provided on the entire periphery of the side draws in the air in the room from the entire periphery of the side. The air purified by removing dust and the like by the filter 3 is discharged downward from the lower outlet 2o as indicated by an arrow α 2 in fig. 3.

The blower unit 1w shown in fig. 3 includes a centrifugal impeller 6, an impeller motor 6m, and a scroll 7.

The impeller motor 6m is disposed coaxially with the centrifugal impeller 6 and drives the centrifugal impeller 6.

The centrifugal impeller 6 is disposed so as to face substantially upward. The centrifugal impeller 6 sucks air from above to below through the air inlet 6i by rotating, and discharges the air to below through the air outlet 2o (arrow α 2 in fig. 3). The air inlet 6i refers to an upper end surface 6h1 (fig. 3) of the blade 6h of the centrifugal impeller 6.

As shown in fig. 4C, the scroll 7 is provided in a spiral shape on the outer periphery of the centrifugal impeller 6 in a plan view.

Fig. 5 shows a rear view of the mobile air purifier 1.

The traveling unit 1r shown in fig. 3 and 5 includes left and right wheels 9s1 and 9s2, wheel motors 9m1 and 9m2 (see fig. 3), and a rear wheel 9 k. The wheel motors 9m1, 9m2 drive the left and right wheels 9s1, 9s2, respectively.

In the portable air cleaner 1, the pair of left and right wheels 9s1, 9s2 and the rear wheel 9k are provided so as to protrude downward. The left and right wheels 9s1, 9s2 are driving wheels, and the rear wheel 9k is a driven wheel.

Belts are used as power transmission means for transmitting power from the wheel motors 9m1, 9m2 to the left and right wheels 9s1, 9s2, respectively. The power from the wheel motors 9m1, 9m2 is transmitted to the left and right wheels 9s1, 9s2 via pulleys (not shown), respectively.

The rear wheels 9k are fixed to the lower plate 2s by casters (not shown) (see fig. 3). The caster is rotatably held to the lower plate 2 s.

The filter 3 shown in fig. 3 and 4B includes a pre-filter for removing dust having a large particle diameter, a HEPA filter for removing dust having a small particle diameter, and a deodorizing filter for removing an odor component.

The filter 3 is provided inside the vehicle body intake port 2i in a substantially circumferential shape in plan view. As shown in fig. 3, the filter 3 is provided on the upper side of the vehicle body 1H in the height direction.

The filter 3 may be provided continuously in a ring shape or may be provided intermittently in a ring shape as long as it is provided on the upper side portion of the vehicle body 1H.

< arrangement of Filter 3 and centrifugal impeller 6 >

In the portable air cleaner 1, the filter 3 is provided on the side of the vehicle body 1H, and the flow direction of the air (arrow α 1 in fig. 3) is deflected substantially at a right angle and flows into the intake port 6i (fig. 3) of the centrifugal impeller 6 facing upward. That is, the air having passed through the filter 3 is deflected substantially at a right angle (vertically downward) and then flows into the inlet 6i of the centrifugal impeller 6.

The lower end surface 3a (see fig. 3) of the filter 3 disposed on the side of the portable air cleaner 1 is disposed above the lower end surface 6h2 of the impeller 6h of the centrifugal impeller 6.

Fig. 6 shows a lower perspective view of the mobile air cleaner 1.

A user alert unit 11c for alerting a user to pay attention is provided at substantially the center of the bottom plate 2t of the mobile air cleaner 1 so as to protrude downward. That is, the user reminding unit 11c is provided at a position that is not directly visible to a person.

In the sleep mode, when a person approaches in the dark, the LED of the user alert unit 11c is caused to blink or light up.

Since the LED of the user alert unit 11c is provided so as to protrude downward, it flickers or turns on toward the floor Y. Therefore, the outline of the mobile air purifier 1 can be presented to the user in the dark without being obtrusive. The user warning means 11c such as an LED may be provided so as to face downward, or may be provided in the vehicle body 1H other than the floor panel 2 t.

< control System >

The control circuit board 5a shown in fig. 3 is supplied with power from the storage battery 5 b.

Fig. 7 shows a block diagram of a control structure of the mobile air purifier 1.

A microcomputer and various circuits are mounted on the control circuit board 5 a.

The mobile air cleaner 1 includes an action control unit 11 and an action control unit 12. The action control unit 11 determines control of the mobile air cleaner 1 based on information from the sensors (11b, 11d) and the like. The operation control unit 12 controls each component of the mobile air cleaner 1 based on information from the action control unit 11.

< action control part 11 >

The action control section 11 includes an arithmetic device 11a to which information of the human body detection unit 11b and the dust sensor 11d is input. The user alert unit 11c blinks or lights up under the control of the arithmetic device 11 a.

The arithmetic device 11a is constituted by hardware and software. The arithmetic device 11a may be constituted by a circuit (hardware only).

The human body detection unit 11b is configured by an ultrasonic sensor, an infrared camera, a laser sensor, a ToF sensor, and the like, and is provided in the vehicle body 1H. The infrared camera is used for detecting obstacles. ToF sensors are used to measure the distance to an obstacle.

As described above, the user reminding unit 11c is constituted by the LED. The LED of the user alert unit 11c blinks or lights up toward the floor Y, notifying the user of the presence of the mobile air purifier 1. The dust sensor 11d is for detecting dust.

In addition, an odor sensor (not shown) for detecting odor may be used as the sensor.

< operation control part 12 >

The operation control unit 12 includes an arithmetic unit 12a, a left/right wheel torque specification means 12b, and a left/right wheel rotation detection means 12 c.

The impeller motor 6m, the left and right wheel motors 9m1, 9m2, and the display unit s2 are controlled by the arithmetic device 12 a.

The arithmetic device 12a is constituted by hardware and software. The arithmetic device 11a may be constituted by a circuit (hardware only).

The left and right wheel torque specifying means 12b is a torque control driver, and causes currents corresponding to predetermined torques to flow to the left and right wheel motors 9m1 and 9m 2.

The left and right wheel rotation detecting units 12c are encoders, hall elements, or the like, and are built in the left and right wheel motors 9m1, 9m 2. The left and right wheel rotation detecting means 12c may be provided outside the left and right wheel motors 9m1, 9m 2.

The information of the left and right wheel rotation detection means 12c is input to the arithmetic device 12 a. The left and right wheel motors 9m1, 9m2 are controlled by the arithmetic device 12a via the left and right wheel torque specifying means 12 b.

The display unit s2 is used to display the operation and operation of the mobile air cleaner 1. The display unit s2 can display information of the action control unit 12 and the action control unit 11. The display unit s2 uses, for example, a 7-segment liquid crystal display.

With the above configuration, the portable air cleaner 1 can automatically travel and clean air in a room through the filter 3.

As described above, the mobile air purifier 1 has the normal mode and the sleep mode. In the sleep mode, the rotational speed of the centrifugal impeller 6 is reduced to suppress the operation noise so as not to disturb the sleep of the user.

< operating part 1S >

As shown in fig. 1, an operation unit 1S of the portable air cleaner 1 is provided on the upper surface of a vehicle body 1H behind a top cover 2 f.

The operation section 1S includes operation keys S1 and a display section S2. The wiring lines connected to the operation keys S1 of the operation section 1S and the display section S2 are connected to the control circuit board 5a (see fig. 3).

< step and driving propulsion of left and right wheels 9s1, 9s2 >

The mobile air cleaner 1 travels so as to avoid the step Y1 (fig. 10) of the floor Y.

Therefore, the driving propulsion force when the left and right wheels 9s1, 9s2 ride over the step Y1 will be described.

Fig. 8 shows the driving propulsive force with time as the mobile air cleaner 1 crosses the step Y1. The horizontal axis of fig. 8 represents time, and the vertical axis of fig. 8 represents driving propulsion (torque).

When the vehicle steps over the step Y1, the driving propulsive force of the left and right wheels 9s1 and 9s2 increases rapidly. Then, after passing over the step Y1, the driving propulsive force is reduced to the same degree as the driving propulsive force before reaching the step Y1.

As can be seen from fig. 8, when the drive propulsive force exceeds the stepwise drive propulsive force fa in the case where the left and right wheels 9s1, 9s2 contact the step Y1, the vehicle body 1H can go over the step Y1.

Fig. 9 is a graph showing the temporal change in the driving propulsive force when the maximum driving propulsive force is restricted by the mobile air cleaner 1 set to the sleep mode. The horizontal axis of fig. 9 represents time, and the vertical axis of fig. 9 represents driving thrust.

By setting the maximum driving propulsive force f1 lower than the stepwise driving propulsive force fa (fig. 8) in the sleep mode, it is not possible to cross the step requiring the stepwise driving propulsive force fa.

That is, the maximum driving propulsive force is limited to be smaller than that of the normal mode by the setting of the sleep mode so that only the step corresponding to the limited maximum driving propulsive force f1 can be passed at the maximum.

Thus, the mobile air cleaner 1 sets the maximum driving propulsive force (maximum torque) f1 using the left and right wheel torque specification units 12b in the sleep mode so that it cannot pass over a step (e.g., a wire, a carpet, etc.) that generates a sound when crossing the step.

< propulsion of left and right wheels 9s1, 9s2 when crossing over step Y1 >

Next, the driving propulsion force of the left and right wheels 9s1 and 9s2 when crossing the step Y1 will be described.

Fig. 10 is a schematic view showing the left and right wheels 9s1, 9s2 of the mobile air cleaner 1 when they cross the step Y1.

The height of the step Y1 from the floor Y is h. When the left and right wheels 9s1, 9s2 abut on the step Y1 at the point P, the left and right wheels 9s1, 9s2 contact the floor Y at the point a.

The left and right wheels 9s1, 9s2 have a radius r and a center O.

The driving propulsive force F when the portable air cleaner 1 rides over the step Y1 is expressed by the following equation (1) based on the relationship that the clockwise moment generated around the point P by the driving propulsive force F is larger than the counterclockwise moment generated by the weight (mg) of the portable air cleaner 1 applied to the left and right wheels 9s1 and 9s 2.

It is assumed that the floor Y on which the mobile air purifier 1 can walk in the sleep mode is a smooth hard floor that does not generate sound when walking, for example. The rolling resistance (the driving propulsive force of the left and right wheels 9s1, 9s2) of a smooth hard floor that does not generate sound is small.

Then, the following expression (2) is established.

Smooth hard floor drive propulsion < maximum drive propulsion in sleep mode f1 < step drive propulsion for set step height (carpet, cable, etc.) (2)

As an example of setting the step height, for example, the level of 2 to 3mm can be considered. The set step height can be determined arbitrarily.

The driving propulsive force of the expression (2) is generated by the left and right wheels 9s1, 9s 2. That is, the driving propulsive force of the expression (2) is the sum of the driving propulsive forces of the left and right wheels 9s1, 9s2, respectively.

< Walking control flow in sleep mode >

Next, a flow of the traveling control in the sleep mode of the portable air cleaner 1 will be described.

Fig. 11 shows a flow of the walking control in the sleep mode of the mobile air cleaner 1.

The control in the sleep mode is mainly performed by the arithmetic device 11a of the action control unit 11 and the arithmetic device 12a of the action control unit 12.

When the portable air cleaner 1 is started, first, the arithmetic device 11a determines whether or not the sleep mode is selected (step S11 in fig. 11).

If not (NO in step S11), the operation proceeds to the normal mode (step S12).

In the case of the sleep mode (yes in step S11), the arithmetic device 12a changes the maximum driving propulsive force (maximum driving torque) of the left and right wheels 9S1, 9S2 to the sleep mode setting by the left and right wheel torque specification means 12 b. Then, the arithmetic device 12a changes the rotation speed of the centrifugal impeller 6 to the sleep mode setting (step S13).

Then, the portable air cleaner 1 randomly moves under the control of the arithmetic device 12a (step S14).

During the random movement, the arithmetic device 11a determines whether or not to shift to the normal mode (step S15).

When it is determined that the mode is shifted to the normal mode (yes in step S15), the mode is shifted to the normal mode (step S12).

If it is not determined to shift to the normal mode (no in step S15), the process shifts to step S16.

In step S16, the arithmetic unit 11a determines whether or not to stop.

When a stop button (not shown) is pressed and it is determined to be stopped (yes in step S16), the operation is stopped.

If it is determined that the stop has not been made (no in step S16), the process proceeds to step S17.

During the random movement, when the left and right wheels 9s1, 9s2 contact the step Y1 (fig. 10) which is larger than the set maximum driving propulsive force f1, the maximum driving propulsive force f1 is restricted, and thus the vehicle cannot pass over the step. Therefore, the mobile air cleaner 1 places the card (stuck) there (cannot go in and out). Therefore, the left and right wheel rotation detecting means 12c detects that the left and right wheels 9S1, 9S2 stop rotating for a certain time (step S17).

When the left and right wheels 9S1, 9S2 are detected to be stopped for a certain period of time (yes in step S17), the arithmetic devices 11a, 12a determine that the vehicle is in the stuck state, and the arithmetic device 12a first performs reverse travel (step S18).

Thereafter, the portable air cleaner 1 performs direction change (changes direction) (step S19) and returns to the random movement (step S14).

On the other hand, in a case where the stop of the rotation of the left and right wheels 9S1, 9S2 is not detected in step S17 (no in step S17), the random movement is continued (step S14).

The above is the walking control in the sleep mode.

In addition, the steps S15 and S16 may not be provided, but a determination step of whether to shift to the normal mode or not and a determination step of whether to stop or not may be provided by another flow.

With the above configuration, when the left and right wheels 9s1, 9s2 meet the step Y1 (fig. 10) of a predetermined height or more in the sleep mode, the portable air cleaner 1 travels so as to avoid the step Y1.

Therefore, the portable air cleaner 1 can avoid the vibration generated when passing over the step Y1, and can ensure the quietness in the sleep mode.

< control of the user alert unit 11c in sleep mode >

The control of the user alert unit 11c that alerts the user will be described.

As shown in fig. 6, a user reminder unit 11c is provided at the center of the bottom plate 2t (see fig. 6) of the mobile air cleaner 1.

In the case where a person is present near the mobile air purifier 1 in the sleep mode, the user alert unit 11c, i.e., the LED, is caused to blink or emit light, illuminating the floor Y below the mobile air purifier 1. Thereby, the outline of the mobile air purifier 1 is presented in the dark, alerting the user to the attention.

Fig. 12 shows a control flow of the user alert unit 11c in the sleep mode.

When the sleep mode is started, the arithmetic device 11a determines whether or not there is a person in the vicinity using the information of the human body detection unit 11b (step S21 in fig. 12).

When it is determined that there is a person (yes in step S21 of fig. 12), the arithmetic device 12a stops the left and right wheels 9S1 and 9S2 by the wheel motors 9m1 and 9m2, and causes the LED of the user alert unit 11c to blink or light up (step S22). Thereafter, the process proceeds to step S21.

When it is determined in step S21 that there is no person (no in step S21 of fig. 12), the arithmetic device 12a operates the left and right wheels 9S1 and 9S2 and turns off the LED of the user alert unit 11c (step S23), and the process proceeds to step S21.

The above is the control of the user alert unit 11c in the sleep mode.

With the above configuration, when a person is present near the user reminding unit 11c in the sleep mode, the LED of the user reminding unit is caused to blink or emit light in the dark, so that the outline of the mobile air purifier 1 is presented. This makes it possible to accurately notify the size and position of the mobile air cleaner 1 without making the user feel dazzling. Therefore, the user can be effectively reminded of the presence of the mobile air purifier 1 while in the sleep mode.

< other embodiments >

1. In the above embodiments, various configurations are described, and the respective configurations can be combined as appropriate.

2. In the above embodiment, the centrifugal impeller 6 is disposed upward or downward, but may be disposed obliquely to the upward or downward direction.

3. As the user alert unit 11c, an organic EL may be mounted on the surface of the vehicle body 1H instead of the LED.

4. The configuration described in the above embodiment is an example, and various other configurations can be adopted within the scope of the invention.

Description of the reference numerals

1: movable air purifier

1H: vehicle body

2: outer cover (casing)

2 i: main air inlet (air inlet)

2 o: main air outlet (air outlet)

3: filter

6: centrifugal impeller (Fan)

9m 1: left wheel motor (Motor for driving)

9m 2: right wheel motor (Motor for driving)

9s 1: left wheel (vehicle wheel)

9s 2: right wheel (wheel)

11 a: arithmetic device (judging unit, lighting control unit)

11 b: human body detection unit

11 c: user reminding unit

12 a: arithmetic device (control device)

12 b: left and right wheel torque specifying means (propulsive force setting means)

Y1: step

The claims (modification according to treaty clause 19)

(after modification) a mobile air purifier, comprising:

a wheel for moving the housing;

a drive motor for driving the wheel;

a filter disposed in the housing and configured to remove dust from indoor air sucked from the air inlet;

a fan which sucks air in the room from the air inlet;

an air outlet for discharging the air from which the dust is removed;

a control device for controlling the drive motor;

a determination unit that determines whether the vehicle is in a first mode or in a second mode in which an operating noise is smaller than that in the first mode; and

and a propulsion force setting unit that sets a maximum propulsion force of the drive motor to a predetermined propulsion force that is smaller than the maximum propulsion force of the drive motor in the first mode in the second mode.

2. The mobile air purifier of claim 1, comprising:

a human body detection unit for detecting whether a person is present;

the user reminding unit is used for reminding people of paying attention; and

a lighting control unit that lights the user reminding unit when a person is detected in the second mode.

3. The mobile air purifier of claim 1, wherein:

the predetermined propulsive force is set to be smaller than the propulsive force capable of passing over the predetermined step.

4. The mobile air purifier of claim 1, comprising:

a human body detection unit for detecting whether a person is present;

the user reminding unit is used for reminding people of paying attention; and

a lighting control unit that blinks or lights the user reminding unit when a person is detected in the second mode,

the user reminding unit is arranged on the lower surface or the downward surface of the vehicle body.

Statement or declaration (modification according to treaty clause 19)

The claims section:

a modification of the content of claim 1 of the original claim.

The feature of "the fan disposed on the downstream side of the air flow of the air after passing through the filter" in claim 1 is modified to "the fan that sucks in the air in the room from the intake port".

The modification is based on the international publication 1, fig. 3 and the descriptions of [0021], [0024], [0026 ].