CN107208913B

CN107208913B - Air purifier

Info

Publication number: CN107208913B
Application number: CN201680007384.7A
Authority: CN
Inventors: 乳井一夫; 久下洋介; 明里好孝
Original assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Home Appliance Co Ltd; Mitsubishi Electric Corp
Priority date: 2015-03-19
Filing date: 2016-01-04
Publication date: 2020-07-28
Anticipated expiration: 2036-01-04
Also published as: TWI616626B; TW201700924A; JP6327398B2; WO2016147676A1; JPWO2016147676A1; CN107208913A

Abstract

An air cleaner in which a main body is stably rotated is provided. To this end, the air cleaner of the present invention includes: a base station; and a main body (1), wherein the main body (1) is arranged above the upper surface of the base (71) and can rotate in the left-right direction relative to the base. The main body (1) has a lower body shell mounted to the lower end of the main body. The base (71) is provided with a recess in a part of the upper surface. A part of the lower body case is housed in the recess so as to protrude downward from the upper surface of the base (71). The main body (1) is rotatably supported by the upper surface vicinity portion of the base (71) and the bottom surface vicinity portion of the recess.

Description

Air purifier

Technical Field

The present invention relates to an air purifier for purifying indoor air.

Background

Conventionally, there is known an air cleaner including a vertically long and high main body, and the main body is rotatably driven by a drive motor. (see, for example, patent document 1).

Prior art documents

Patent document

Patent document 1: japanese patent No. 4333024

Disclosure of Invention

Problems to be solved by the invention

In the air cleaner disclosed in patent document 1, a support plate is attached to a base, a plurality of rollers provided on the support plate rotatably support a planar rotating plate, and a main body is disposed on the rotating plate.

The crank mechanism converts the rotational motion of the drive motor into a reciprocating motion by the crank mechanism and the drive motor provided on the support plate, and the reciprocating motion causes the crank shaft of the crank mechanism to be movably attached to move left and right, thereby rotating the rotating plate and rotating the main body disposed thereon.

In the air cleaner disclosed in patent document 1, since the main body is disposed on the planar rotating plate, the vertically long and high main body may become unstable when rotated. In addition, in a structure in which the rotational motion of the drive motor is converted into the reciprocating motion by the crank mechanism to rotate the main body, it is difficult to perform smooth rotation. This promotes instability, deteriorates the balance during rotation, and in the worst case, the upper side of the air cleaner may be unstable and fall down.

Further, although the plurality of rollers for rotatably supporting the rotating plate are provided, they are arranged only on a single plane and on concentric circles from the center of the single circle, and therefore, the instability in rotation of the main body cannot be completely suppressed.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an air cleaner with high safety, which can suppress instability in rotation and can stably rotate a main body even if the main body is vertically long and high.

Means for solving the problems

An air cleaner according to the present invention for solving the problem includes: a base having a lower surface, an upper surface and a side surface, the upper surface being disposed in parallel with the lower surface at a distance, the side surface connecting the lower surface and the upper surface; and a main body provided above the upper surface of the base and rotatable in the left-right direction with respect to the base. The main body has a lower body shell forming a lower end of the main body. A drive unit for rotating the main body is provided in the lower main body case. A recess is provided in a part of the upper surface of the base. The drive unit has a drive motor, a pinion gear, and a coupling shaft that transmits rotation of the drive motor to the pinion gear. A part of the lower body case is accommodated in the recess so as to protrude downward from the upper surface of the base. The main body is rotatably supported while being varied in height by the upper surface vicinity portion of the base and the bottom surface vicinity portion of the recess. The pinion is disposed in the recess.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a part of the lower body case is accommodated in the recess provided in the upper surface of the base, and the body is rotatably supported by two surfaces having different heights, i.e., the upper surface of the base and the bottom surface of the recess, so that instability is suppressed. According to the present invention, an air cleaner in which the rotation of the main body is stable and which is highly safe can be provided.

Drawings

Fig. 1 is a perspective view showing a schematic configuration of an air cleaner according to embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view of the air cleaner of embodiment 1 of the present invention, taken along the cross-section a-a shown in fig. 1.

Fig. 3 is an exploded perspective view of an air cleaner according to embodiment 1 of the present invention.

Fig. 4 is a perspective view of an air cleaner body support base to which a stepping motor is attached in the air cleaner according to embodiment 1 of the present invention.

Fig. 5 is an exploded perspective view of the air cleaner body support stand shown in fig. 4.

Fig. 6 is an exploded view of the structure of the clutch mechanism of the coupling shaft for coupling the stepping motor and the pinion gear in the air cleaner according to embodiment 1 of the present invention.

Fig. 7 is a plan view (a) of the air cleaner body support base shown in fig. 4 as viewed from above and a cross-sectional view (B) taken along a section B-B shown in the plan view (a).

Fig. 8 is a schematic view (a) showing the position of the wheels of the air cleaner according to embodiment 1 of the present invention and a schematic view (b) showing the air cleaner with the wheels on the same plane.

Fig. 9 is a state diagram (a) of the position detection mechanism when the position of the air cleaner of embodiment 1 of the present invention is detected as the reference state position, a state diagram (b) of the position detection mechanism when the position of the air cleaner of embodiment 1 of the present invention rotated leftward (direction L in fig. 1) from the reference state position is detected, and a state diagram (c) of the position detection mechanism when the position of the air cleaner of embodiment 1 of the present invention is detected as rotated further leftward from the position of the state diagram (b).

Fig. 10 is a schematic block diagram of an air cleaner according to embodiment 1 of the present invention.

Detailed Description

Embodiment 1.

(Main body construction of air purifier)

Fig. 1 is a perspective view showing a schematic configuration of an air cleaner according to embodiment 1 of the present invention. Fig. 2 is a cross-sectional view of the air cleaner of embodiment 1 of the present invention, taken along the cross-section a-a shown in fig. 1. Fig. 3 is an exploded perspective view of an air cleaner according to embodiment 1 of the present invention.

An air cleaner according to embodiment 1 of the present invention will be described with reference to fig. 1 to 3. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and a description of some portions may be omitted.

The air purifier 100 includes a main body 1 and a supporting table 2. As shown in fig. 1, the main body 1 is a rectangular parallelepiped shape long in the longitudinal direction. A support base 2 is provided below the rectangular parallelepiped body 1. The support table 2 rotatably supports the main body 1 so that the orientation of the main body 1 can be changed. The turning structure of the main body 1 and the support base 2 will be described in detail later with reference to fig. 4 to 7.

As shown in fig. 3, the main body 1 is configured such that four sides of the long sides of a rectangular parallelepiped shape are covered with a cover member. Specifically, the front surface is covered with the front panel 3, the side surfaces are covered with the

side surface covers

4 and 5, and the rear surface is covered with the rear surface cover 6, and the front panel 3, the side surface cover 4, the side surface cover 5, and the rear surface cover 6 are cover members integrally formed by resin molding.

The main structure of the main body 1 is provided with a front body case 7 and a rear body case 8, which cover the four sides of the interior by a front panel 3, a side cover 4, a side cover 5, and a rear cover 6. The front body case 7 and the rear body case 8 are integrally formed by resin molding, respectively.

An upper fan unit 9 and a lower fan unit 10 are mounted to the rear body case 8, respectively, the upper fan unit 9 including a fan 21, a fan motor 22, and a motor holding member 23, and the lower fan unit 10 including a fan 24, a fan motor 25, and a motor holding member 26.

A part of the fan motor 22 of the upper fan unit 9 enters the upper fan case rear panel recess 8c provided in the upper fan case rear panel 8b of the upper fan case 8a, and the fan motor rotary shaft 22a is passed through a hole, not shown, of the motor holding member 23 to be held by the motor holding member 23. Thereafter, the motor holding member 23 is fixed to the upper fan case rear panel 8b by a screw (fastening member) not shown.

The fan motor rotating shaft 22a passes through the spacer 27a for preventing the fan 21 from being unstable, the fan 21, and the spacer 27b for preventing the fan 21 from being unstable. The upper fan unit 9 is configured by fixing the fan 21 to the fan motor rotation shaft 22a with a nut 28 shown in fig. 2.

Similarly, a part of the fan motor 25 of the lower fan unit 10 enters the lower fan case rear panel recess 8f provided in the lower fan case rear panel 8e of the lower fan case 8d, and the fan motor rotating shaft 25a is inserted through a hole, not shown, of the motor holding member 26 and held by the motor holding member 26. Thereafter, the motor holding member 26 is fixed to the lower fan case rear panel recess 8f by a screw (fastening member) not shown.

The fan motor rotating shaft 25a penetrates a spacer 27a for preventing the fan 24 from being unstable, the fan 24, and a spacer 27b for preventing the fan 24 from being unstable. The lower fan unit 10 is configured by fixing the fan 24 to the fan motor rotation shaft 25a with a nut 28 shown in fig. 2.

The front body casing 7 is attached to the front of the rear body casing 8 to which the upper fan unit 9 and the lower fan unit 10 are attached, with screws (fastening members) not shown. The front body case 7 includes: an upper fan case cover 7a, the upper fan case cover 7a covering an upper fan case 8 a; and a lower fan case cover 7c, the lower fan case cover 7c covering the lower fan case 8 d.

An upper fan case cover opening 7b is provided in the upper fan case cover 7a, and the upper fan case cover opening 7b is used to supply air to the upper fan unit 9. A lower fan case cover opening 7d is provided in the lower fan case cover 7c, and the lower fan case cover opening 7d is used to supply air to the lower fan unit 10.

The fan 21 of the upper fan unit 9 is a sirocco fan that draws air in from the axial front direction of the rotary shaft and sends it out in the centrifugal direction. A scroll space for blowing air by the upper fan unit 9 is formed by the upper fan case 8a and the upper fan case cover 7 a.

Likewise, the fan 24 of the lower fan unit 10 is also a sirocco fan. A scroll space for blowing air by the lower fan unit 10 is formed by the lower fan case 8d and the lower fan case cover 7 c.

As shown in fig. 2, a front side outlet 64 is provided above the scroll space formed by the upper fan case 8a and the upper fan case cover 7 a. The front side outlet 64 is for the upper fan unit 9 to centrifugally discharge air taken in from the upper fan case cover opening 7b in the axial front direction of the rotary shaft.

An air passage 66 is provided above the scroll space formed by the lower fan case 8d and the lower fan case cover 7 c. The ventilation passage 66 is formed by the rear cover 6 and the upper fan case rear panel 8b, and the rear cover 6 is attached to the rear body case 8 by screws (fastening members) not shown.

The air passage 66 is an air passage for guiding the air sucked by the lower fan unit 10 to the rear side outlet 65 through the back surface of the scroll space formed by the upper fan case 8a and the upper fan case cover 7 a. The rear side outlet 65 is provided at the same height as the front side outlet 64.

The scroll space formed by the lower fan case 8d and the lower fan case cover 7c is disposed offset to the rear side, which is a position close to the ventilation passage 66, with respect to the scroll space formed by the upper fan case 8a and the upper fan case cover 7 a.

With this arrangement, the path from the scroll space formed by the lower fan case 8d and the lower fan case cover 7c to the air passage 66 is not sharply bent, and the pressure loss in the air passage through which the air flows can be reduced.

A protection net 31 is attached above the front side outlet 64 and the rear side outlet 65. The protection net 31 protects foreign matter from entering the scroll space formed by the lower fan case 8d and the lower fan case cover 7c without passing through the scroll space formed by the upper fan case 8a and the upper fan case cover 7a and the ventilation passage 66, and prevents a finger from touching a rotating object such as the fan 21.

An upper unit 40 is provided above the protective net 31. The upper unit 40 includes a front louver 62 and a rear louver 63, and a front louver drive motor 54a and a rear louver drive motor 54b for driving them.

The front louver 62 blows most of the air blown out of the upper fan unit 9 from the front outlet 64 to an upward range from diagonally upward in front, for example, a range from 45 degrees to 90 degrees from diagonally upward in front. Similarly, the rear louver 63 blows most of the air blown out of the lower fan unit 10 from the rear outlet 65 to an upper area, for example, an area of 45 degrees to 90 degrees. The front louver 62 and the rear louver 63 are closed when the air cleaner 100 is not in operation. When the air cleaner 100 is in operation, the front louver 62 and the rear louver 63 are opened as shown in fig. 1.

Further, the upper unit 40 includes a human detection sensor 45. The human detection sensor 45 detects the position of a human in a room where the air purifier 100 is placed, in order to determine the direction of air blown by the air purifier 100. This changes the direction of air to be sent toward the position where the person is detected. Specifically, the air delivery direction is changed by rotating the main body 1 so that the front panel 3 of the main body 1 faces the direction of the position of the person. In the following, a case will be described in which the air delivery direction is changed by rotating the main body 1.

An operation display unit 41 is provided in front of the upper surface of the upper unit 40. The operation display portion 41 includes an operation substrate unit 42, a plurality of operation switches 43, and an appearance sheet 44. Various inputs such as selection for operating the air cleaner 100 are performed by the operation switch 43. The operation signal from the operation substrate unit 42 is sent to a control substrate 49 connected to the operation substrate unit 42 by a signal line not shown. The input information and the operation status are displayed on a display unit not shown.

As shown in fig. 3, a control substrate 49 is housed in substrate cases 48 and 50, and covered with covers 47 and 51, constituting a control substrate unit 46. The control board 49 is provided with a control circuit including a microcomputer 49a, an output circuit 49b, and the like, which will be described later. The output circuit 49b is composed of an electronic component mounted on the substrate.

The substrate cases 48 and 50 are formed of a flame-retardant resin. The caps 47 and 51 are formed of metal. The control board unit 46 is accommodated in a space 53 which does not affect the air passage between the scroll space formed by the upper fan case 8a and the upper fan case cover 7a and the scroll space formed by the lower fan case 8d and the lower fan case cover 7c shown in fig. 3.

As described above, the control board 49 is connected to the operation board unit 42 by a connection line not shown. The lead cover 52 is attached to the rear body case 8 so that the connection wires led out from the upper fan unit 9 do not touch the fan 21.

The control board 49 is connected to the upper fan unit 9 and the lower fan unit 10 by a connection line not shown, and is supplied with drive power. The unillustrated connecting line is housed in a space formed by the front body case 7, the rear body case 8, and the side cover 4, or the front body case 7, the rear body case 8, and the side cover 5, and the space does not interfere with the wind path such as the scroll space.

Next, the side cover 4 is attached to the right side and the side cover 5 is attached to the left side as viewed from the front side in the side direction of the front body case 7 and the rear body case 8. The side covers 4 and 5 each have a plurality of engagement pieces, not shown, which are attached to be inserted into engagement portions provided in the rear cover 6. The side covers 4 and 5 are attached to the front body case 7 from the front side with screws (fastening members) not shown. When the side covers 4 and 5 are attached, the screws (fastening members) to which the rear cover 6 is attached are hidden by the side covers 4 and 5 and are not visible in appearance, so that the design property is improved.

The side cover 4 is provided with a recessed grip portion 4a recessed toward the inside of the body 1. Similarly, a concave handle portion 5a is provided in the side cover 5. When the user moves the air cleaner 100, the user carries the air cleaner by putting his or her hands on the handle portions 4a and 5 a.

Further, an appearance sheet 4b is provided on the upper portion of the side cover 4. An appearance sheet 5b is provided on the upper portion of the side cover 5. The design sheets 4b and 5b are members for improving the appearance quality, but it is not always necessary that the upper portions of the side covers 4 and 5 are designed as the design.

Next, as shown in fig. 3, an upper fan guard 32 is provided in front of the upper fan case cover opening 7 b. A lower fan guard 33 is provided in front of the lower fan case cover opening 7 d. The upper fan guard 32 and the lower fan guard 33 protect the rotating objects such as the fan 21 and the fan 24 from foreign matters entering the scroll space and from being touched by fingers.

Further, a deodorizing filter 34, a HEPA filter 35, and pre-filters 36a and 36b are provided in front of the filter. The prefilters 36a and 36b capture slightly large dust contained in the sucked air. The fine dust is captured by the HEPA filter 35, and the air is purified and discharged. The deodorizing filter 34 has a function of reducing odor by adsorbing odor of the sucked air.

The front panel 3 is detachably attached to the front of the filter to cover the filter. The replacement and cleaning of the filters can be easily performed by removing the front panel 3. In addition, when the front panel 3 is attached, the screws (fastening members) to which the side covers 4 and 5 are attached from the front surface side are hidden by the front panel 3 and are not visible in appearance, so that the design property is improved.

A recessed drop-in portion is provided above the front panel 3. The concave drop-in portion has an opening at the center thereof. In a state where the front panel 3 is attached, the human detection sensor 45 protrudes from the opening.

As shown in fig. 3, a recess 4c is provided in front of the side cover 4. Similarly, a recess 5c is provided in front of the side cover 5. As shown in fig. 1, the front panel 3 and the recess 4c in front of the side cover 4 form an air inlet 61. The air inlet 61 sucks air sucked into a scroll space formed by the upper fan case 8a and the upper fan case cover 7a and a scroll space formed by the lower fan case 8d and the lower fan case cover 7 c. Although not shown, the air inlet is also formed by the front panel 3 and the recess 5c in front of the side cover 5.

(supporting table structure of main body)

Next, the lower portion of the main body 1 and the support base 2 supporting the main body 1 will be described with reference to fig. 4 to 9. Further, the explanation may be made using the aforementioned drawings.

Fig. 4 is a perspective view of an air cleaner body support base of an air cleaner according to embodiment 1 of the present invention, on which a stepping motor is mounted, fig. 5 is an exploded perspective view of the air cleaner body support base shown in fig. 4, fig. 6 is a structural exploded view of a clutch mechanism of a coupling shaft for coupling a stepping motor and a pinion of the air cleaner according to embodiment 1 of the present invention, fig. 7(a) is a top view of the air cleaner body support base shown in fig. 4, fig. 7(B) is a cross-sectional view taken along a section B-B shown in fig. 7(a), fig. 8(a) is a schematic view showing a position of a wheel of the air cleaner according to embodiment 1 of the present invention, fig. 8(B) is a schematic view showing the air cleaner on the same plane, fig. 9(a) is a state view of a position detection mechanism when a position of the air cleaner according to embodiment 1 of the present invention in a reference state is detected, fig. 9(B) is a state in which the air cleaner body support base is detected to have been rotated leftward from the position of embodiment 1 of the present invention (B) to a reference position in a state shown in fig. 9 (B).

The support table 2 rotatably supports the main body 1. The main body 1 is rotated by a stepping motor (drive motor) 82 described later.

The support base 2 includes a flat rectangular parallelepiped base 71 having a long side in the left-right direction and a short side in the front-rear direction. The base 71 is provided with a circular recess 71 j. A rotation center shaft guide 73 is provided at the center of the circular recess 71j, and the rotation center shaft guide 73 is hollow and has an open front end. The rotation center shaft 76 is attached to the rotation center shaft guide 73 by a fastening member such as a screw. The rotation center shaft 76 is made of a resin having high slidability, for example, Polyacetal (POM) resin.

In fig. 4, 5, and 7, reference numeral 29 denotes a lower body case formed by resin molding. The lower body case 29 is fixed so as to sandwich a flange 29g and a flange 29h from front and rear with the lower portion of the front body case 7 and the lower portion of the rear body case 8 shown in fig. 3, the flange 29g and the flange 29h protruding outward from the outer periphery. As shown in fig. 1 and 2, the lower body case 29 is attached to the body 1 and constitutes the lower end of the body 1.

A sliding plate 74 is attached to the lower body case 29, the sliding plate 74 is made of metal and formed into a disk shape, and the sliding plate 74 is formed into a ring shape with an opening 74a provided in the disk shape. The lower end of the lower body case 29 protrudes downward from the opening 74a of the slide plate 74. The lower body case 29 and the slide plate 74 are attached by screws (fastening members) as a structural body at positions where the upper surface of the slide plate 74 abuts against the lower surfaces of the flange 29g and the flange 29 h.

The slide plate 74 is housed in a step portion 71g that is lowered by one step from the upper surface of the base 71. The base 71 is provided with a plurality of slide plate presser holders 71 a. By attaching the same number of slide plate pressers 75 as the plurality of slide plate pressers 71a with screws (fastening members), a part of the outer periphery descending one step from the upper surface of the slide plate 74 is pressed so that the lower body case 29 cannot be detached from the base 71. However, the slide plate 74 is not fixed in an immovable state, but is rotatably pressed with a slight gap.

Since the slide plate 74 is rotatably pressed with a slight gap, the slide plate 74 does not float upward and the lower body case 29 cannot be detached from the base 71. Therefore, the inclination and shaking of the main body 1 can be suppressed.

An edge 74b bent downward is formed on the entire outer periphery of the slide plate 74. An annular recess 71h is provided around the entire periphery of a step portion 71g that is lowered by one step from the upper surface of the base 71. In a state where the slide plate 74 is accommodated in the stepped portion 71g, the edge portion 74b is fitted into the annular recessed portion 71h over the entire circumference.

With this structure, foreign matter such as dust is less likely to enter step portion 71g and recessed portion 71j of base 71. Further, as described above, since the slide plate 74 is pressed by the slide plate presser 75 so as not to float, a structure in which foreign matter such as dust is less likely to enter is more reliably obtained.

By adopting such a structure in which foreign matter such as dust is less likely to enter, the dust does not interfere with the support side wheels 78 that assist the rotation of the main body 1, which will be described later, and does not hinder the operation. Further, the operation of the members for rotating the main body 1, such as the stepping motor (drive motor) 82 and the pinion gear 84, is not hindered.

A rotation center bearing 29f is provided at the center of the lower body case 29. When the lower body case 29 is attached to the base 71, the rotation center bearing 29f is rotatably inserted on the rotation center shaft 76. The lower body case 29 is inserted onto the rotation center shaft 76. The stopper 79 is attached so as to sandwich the groove-like recess 76a provided in the rotation center shaft 76 from a lateral hole provided in a side surface of the rotation center bearing 29 f. The stopper 79 prevents the lower body case 29 from being detached from the base 71.

As described above, the front end of the rotation center shaft guide 73 is open. The opening penetrates a connection terminal side of a power supply line 55 into the main body 1, the power supply line 55 being used for supplying driving power from a commercial power supply. The rotation center shaft guide 73 is a rotation center of the rotating body 1, and the power cord 55 is connected to the control board 49 through a connection line not shown in the figure. Therefore, even if the main body 1 is rotated relative to the support base 2, the power line 55 and a connection line not shown can be prevented from being bent, and disconnection is less likely to occur.

The lower body case 29 is provided with a drive unit support portion 29a, and the drive unit support portion 29a protrudes upward from below (is recessed when viewed from below). The main body rotation driving unit 81 is mounted to the driving unit support portion 29a with a screw (fastening member) from below. The main body rotation driving unit 81 includes a stepping motor (driving motor) 82 whose rotation speed can be easily changed by the number of pulses, a coupling shaft 83, a pinion gear 84, and a bearing 85.

The coupling shaft 83 transmits the driving torque of the stepping motor (driving motor) 82 to the pinion gear 84. The coupling shaft 83 is coupled to a pinion gear 84, one end of which is coupled to a stepping motor (drive motor) 82, and the other end of which is rotatably supported by a bearing 85, and the bearing 85 is attached to a holding member 86.

The coupling portion where the coupling shaft 83 and the pinion gear 84 are coupled has a clutch mechanism shown in fig. 6. The coupling shaft 83 is provided with a clutch through hole 83 a. A clutch spring 88 is disposed in the clutch through hole 83 a. Clutch balls 87 are slidably disposed at both ends of a clutch spring 88.

The clutch balls 87 are biased by clutch springs 88 in directions protruding from both through holes of the clutch through hole 83 a. The pinion gear 84 is provided with a clutch groove 84a, and the clutch groove 84a is fitted with a clutch ball 87.

When the main body 1 is rotated by the stepping motor (drive motor) 82, the clutch ball 87 is fitted into the clutch groove 84a, and the drive torque of the stepping motor (drive motor) 82 is transmitted to the pinion gear 84.

The spring load of the clutch spring 88 is set so that the rotation of the coupling shaft 83 and the pinion gear 84 can be stopped by the drive torque of the stepping motor (drive motor) 82 while ensuring the state in which the clutch balls 87 are pressed against the clutch groove 84 a.

However, when a rotational force exceeding the driving torque of the stepping motor (driving motor) 82 or a reverse rotational force is applied to the main body 1, the clutch balls 87 are disengaged from the clutch grooves 84a, pressed by the inner peripheral wall 84b of the pinion gear 84, and moved in the inner direction of the clutch through-hole 83a against the biasing force of the clutch spring 88, regardless of intention or carelessness. Thereby, the rotation stop of the coupling shaft 83 and the pinion gear 84 is released.

Due to this clutch mechanism, even if a rotational force such as a rotational force exceeding the driving torque of the stepping motor (driving motor) 82 or a reverse rotational force is applied to the main body 1, the load is not directly applied to the stepping motor (driving motor) 82, and the stepping motor (driving motor) 82 is protected. Further, stress is not applied to a driving structure for rotating the main body 1, such as the pinion 84 and the rack 72 described later, and therefore the driving structure is not damaged.

In the lower body case 29, the same number of body-side wheel holding portions 29e as the number of body-side wheels (1 st wheel) 77 are provided at the position of the recess 71j accommodated in the base 71, in other words, at the lower end, and the body-side wheel holding portions 29e rotatably hold the plurality of body-side wheels (1 st wheel) 77. The body-side wheel holding portion 29e inserts the body-side wheel (1 st wheel) 77 from the lower surface side. The body-side wheel (1 st wheel) 77 partially protrudes from the lower surface of the lower body case 29 in a held state.

The main body side wheel (1 st wheel) 77 is held by the main body side wheel holding portion 29e of the lower main body case 29. As shown in fig. 2 and 7b, the main body side wheel (1 st wheel) 77 is in contact with the bottom surface 71k of the recess 71j of the base 71, supports the main body 1, and rotates in accordance with the rotation of the main body 1.

The base 71 is provided with a number of support table side wheel holding portions 71f equal to the number of support table side wheels (2 nd wheel) 78 at a position outside the main body side wheel (1 st wheel) 77 and above the holding position of the main body side wheel (1 st wheel) 77 from the center of the rotation center shaft 76, and the support table side wheel holding portions 71f rotatably hold the plurality of support table side wheels (2 nd wheel) 78.

The support table side wheel holding portion 71f is provided on the step portion 71g on the upper surface of the base 71, and is provided on the nearest inner side of the annular recess 71 h. The support table side wheel holding portion 71f inserts the support table side wheel (2 nd wheel) 78 from the upper surface side of the step portion 71 g. The support table side wheel (2 nd wheel) 78 partially protrudes from the upper surface of the step portion 71g in the held state.

The support table side wheel (2 nd wheel) 78 is held by the support table side wheel holding portion 71 f. As shown in fig. 2 and 7b, a support table side wheel (2 nd wheel) 78 abuts against the lower surface side of the slide plate 74, supports the main body 1, and rotates in accordance with the rotation of the main body 1.

As shown in fig. 2 and 7(b), the lower body case 29 enters the recess 71j of the base 71. A main body side wheel (1 st wheel) 77, a part of which protrudes from the lower surface of the lower body case 29, comes into contact with the bottom surface 71k of the recess 71j of the base 71, thereby supporting the main body 1.

The slide plate 74 attached to the lower body case 29 abuts against a support base side wheel (2 nd wheel) 78, a part of which protrudes from the upper surface of the step portion 71g of the base 71, to support the body 1. Thus, the main body 1 is supported by the bottom surface 71k of the recess 71j of the base 71 and the step portion 71g on the upper surface of the base 71. Therefore, the rotation of the main body 1 is stabilized.

The description will be made in more detail with reference to fig. 8. Fig. 8(a) schematically shows the positions of a main body side wheel (1 st wheel) 77 and a support base side wheel (2 nd wheel) 78 supported by the main body 1 of the air cleaner according to embodiment 1 of the present invention. Fig. 8(b) schematically shows the positions of the

wheels

91 and 92 supporting the main body 90 of the air cleaner with the wheels on the same plane.

In fig. 8(a), G is the position of the center of gravity of the main body 1, and S indicates the direction of the force applied to the center of gravity G when the main body 1 is tilted. Similarly, in fig. 8(b), G is the position of the center of gravity of the main body 90, and S represents the direction of the force applied to the center of gravity G when the main body 90 is tilted.

The distance from the center of the rotation center axis 76 to the support table side wheel (2 nd wheel) 78 and the wheel 92 is assumed to be equal to the distance from the center of the rotation center axis 76 to the main body side wheel (1 st wheel) 77 and the wheel 91, and the inclination angles of the main body 1 and the main body 90 are assumed to be equal. When the force is applied in the direction in which the main body 1 is tilted, in the air cleaner according to embodiment 1 of the present invention, as shown in fig. 8(a), the direction S of the force is applied to the inner side of the support-table-side wheel 78, and the support-table-side wheel 78 is positioned on the outer side of the main-body-side wheel 77.

In contrast, in the air cleaner in which the wheels are on the same plane, as shown in fig. 8(b), the direction S of the force is applied further outward than the wheels 92, and the wheels 92 are located further outward than the wheels 91. Therefore, in the air cleaner in which the wheels are on the same plane, the force applied in the direction of inclination cannot be suppressed, and thus the main body 90 is inclined.

In the air cleaner according to embodiment 1 of the present invention, the main body side wheel (1 st wheel) 77 and the support base side wheel (2 nd wheel) 78 have a step difference, and as described above, a tilting force is applied to the inner side of the support base side wheel (2 nd wheel) 78 located on the outer side of the main body side wheel (1 st wheel) 77. This can suppress the force applied when the body 1 is tilted, and thus can suppress the tilting of the body.

Next, the rack 72 is provided along the inner peripheral wall of the edge portion of the recess of the base 71. The rack 72 is engaged with the pinion 84 of the main body rotation drive unit 81 in a state where the rotation center bearing 29f of the lower main body case 29 is inserted on the rotation center shaft 76, the slide plate 74 is rotatably pressed by the slide plate pressing piece 75, and the stopper 79 is attached so that the lower main body case 29 cannot be detached.

Next, in the lower body case 29, the position detection mechanisms 80a, 80b, and 80c, which are formed of, for example, photo interrupters, are held by the position detection mechanism holding portions 29b, 29c, and 29d, respectively.

The photo interrupter includes a light emitting portion and a light receiving portion. The photo interrupter is a sensor that detects whether the light receiving unit can receive the light emitted by the light emitting unit or cannot receive the light. The position detection mechanisms 80a, 80b, and 80c are arranged such that the intermediate positions of the light emitting section and the light receiving section are equally spaced on the same circle from the center of the rotation center axis 76.

A rib-like blocking wall 71b is provided on the base 71 so as to protrude upward from the bottom surface, and the rib-like blocking wall 71b blocks the light emitting section and the light receiving section of the position detection mechanisms 80a, 80b, and 80 c. The blocking wall 71b is formed in an arc shape on the same circle from the center of the rotation center axis 76, and is formed to overlap a circle concentric with the intermediate position between the light emitting section and the light receiving section of the position detection mechanism 80a, 80b, 80 c. The blocking wall 71b is provided with position detection slits 71c, 71d, and 71e at equal intervals, and light emitted from the light emitting portions of the position detection mechanisms 80a, 80b, and 80c can pass through the position detection slits 71c, 71d, and 71 e.

As shown in fig. 1, the state in which the front panel 3 is parallel to one side of the base 71 of the support base 2 in the lateral longitudinal direction is the position in which the main body 1 is in the reference state. In this state, the position detection mechanism 80a is disposed corresponding to the position detection slit 71 c. In this state, the position detection mechanism 80b is disposed corresponding to the position detection slit 71 d. In this state, the position detection mechanism 80c is disposed corresponding to the position detection slit 71 e.

In this state, all of the position detection mechanisms 80a, 80b, and 80c are in a state in which the light receiving section can receive the light emitted by the light emitting section. Therefore, when all the position detection mechanisms 80a, 80b, and 80c are in the receivable state, it can be determined that the main body 1 is at the position of the reference state.

The description will be made in more detail with reference to fig. 9. Fig. 9(a) shows the positional relationship between the position detection mechanisms 80a, 80b, and 80c and the position detection slits 71c, 71d, and 71e when the main body 1 is at the reference position.

The position detection slit 71c allows light emitted from the light emitting section of the position detection mechanism 80a to be received by the light receiving section of the position detection mechanism 80a, the position detection slit 71d allows light emitted from the light emitting section of the position detection mechanism 80b to be received by the light receiving section of the position detection mechanism 80b, and the position detection slit 71e allows light emitted from the light emitting section of the position detection mechanism 80c to be received by the light receiving section of the position detection mechanism 80 c.

Fig. 9(b) shows the positional relationship between the position detection mechanisms 80a, 80b, 80c and the position detection slits 71c, 71d, 71e when the main body 1 is rotated leftward (in the direction L shown in fig. 1), the position detection mechanism 80a can receive light through the position detection slit 71d, and the position detection mechanism 80b can receive light through the position detection slit 71e, but the position detection mechanism 80c is displaced from the position detection slit, and light is blocked by the blocking wall 71b, and light reception is not possible.

Fig. 9(c) shows the positional relationship between the position detection mechanisms 80a, 80b, 80c and the position detection slits 71c, 71d, 71e when the main body 1 is rotated further leftward than the state of fig. 9 (b). The position detection mechanism 80a can receive light through the position detection slit 71e, but the position detection mechanism 80b and the position detection mechanism 80c are displaced from the position detection slit, and light is blocked by the blocking wall 71b, and light reception is not possible.

In this way, the degree of the left or right rotation of the main body 1 can be determined by the combination of the light receiving states of the position detection mechanisms 80a, 80b, and 80 c. That is, if all of the position detection mechanisms 80a, 80b, and 80c are not in a state where the light receiving unit can receive the light emitted by the light emitting unit, it can be determined that the main body 1 is not in the reference state. By rotating the main body 1 so as to return to a position where all of the position detection mechanisms 80a, 80b, and 80c can receive light, the main body 1 can be returned to the position of the reference state.

(action of air purifier)

Next, the operation of the air cleaner 100 will be described with reference to fig. 10. Fig. 10 is a schematic block diagram of an air cleaner according to embodiment 1 of the present invention.

A microcomputer 49a is mounted on the control board 49, and a control circuit such as an output circuit 49b is formed by a wiring pattern, not shown, provided on the board and mounted electronic components.

The output circuit 49b is connected to the upper fan unit 9, the lower fan unit 10, the front louver driving motor 54a, the rear louver driving motor 54b, and the stepping motor (driving motor) 82.

When the air cleaner 100 is operated, first, when a plug, not shown, of the power cord 55 is inserted into an outlet, the position detection means 80a, 80b, 80c detect whether or not the main body 1 is facing the front.

If the main body 1 is not in the reference state, i.e., in the state of facing the front, the microcomputer 49a drives the stepping motor (drive motor) 82 to rotate the main body 1 so that the main body 1 faces the front, and becomes the standby state when the main body 1 faces the front. In the case where the main body 1 is already in a state of facing the front, the standby state is maintained.

When the user operates the operation switch 43 from the standby state, an input signal is transmitted to the microcomputer 49a of the control board 49 via the operation board unit 42. The front louver driving motor 54a and the rear louver driving motor 54b are driven, and the front louver 62 and the rear louver 63 are opened so that the blown air is blown in a forward and obliquely upward direction.

Thereafter, the upper fan unit 9 and the lower fan unit 10 are driven to start air intake. The outside air is sucked through an air inlet 61 formed by the front panel 3 and the recess 4c in front of the side cover 4 and an air inlet, not shown, formed by the front panel 3 and the recess 5c in front of the side cover 5. The sucked air is purified by the pre-filters 36a and 36b, the HEPA filter 35, and the deodorizing filter 34, sucked into the upper fan unit 9 through the upper fan guard 32 and the upper fan case cover opening 7b, and sucked into the lower fan unit 10 through the lower fan guard 33 and the lower fan case cover opening 7 d.

The air after the purification sucked into the upper fan unit 9 and the lower fan unit 10 is blown from the front side outlet 64 and the rear side outlet 65, passes through the protective net 31, and is blown in the forward and obliquely upward direction by the front louvers 62 and the rear louvers 63.

Further, thereafter, the human detection sensor 45 starts sensing. The person detection sensor 45 detects whether or not a person is present in the room in which the air cleaner 100 is placed. If the presence of a person cannot be detected, the microcomputer 49a drives the front louver drive motor 54a and the rear louver drive motor 54b so that the front louver 62 and the rear louver 63 are inclined upward by about 45 degrees in the front direction in order to allow the blown air to reach a further distant position without rotating the main body 1.

When a person is detected by the person detection sensor 45, a signal relating to information on the position of the person is transmitted to the microcomputer 49a of the control board 49 via the operation board unit 42. Based on the position information, the microcomputer 49a drives a stepping motor (drive motor) 82 to rotate the main body 1 so as to blow air in the direction toward the person.

When the stepping motor (drive motor) 82 is driven, the pinion 84 attached to the coupling shaft 83 coupled to the stepping motor (drive motor) 82 rotates. The pinion gear 84 moves while rotating by meshing with the rack gear 72.

The lower body case 29 rotates about the rotation center shaft 76 with the movement of the pinion gear 84. The main body 1 is fastened to the lower body case 29, and therefore rotates with respect to the support table 2 in accordance with the rotation of the lower body case 29. Thus, the front panel of the main body 1 blows air in the direction of the person.

Then, the front louver driving motor 54a and the rear louver driving motor 54b are driven so that the front louver 62 and the rear louver 63 face upward by about 90 degrees so that the blown air does not directly collide with a person. The timing of operation of the human detection sensor 45 may be after the main body 1 is facing the front and before the upper fan unit 9 and the lower fan unit 10 are driven.

As described above, the lower portion of the main body of the air cleaner according to embodiment 1 of the present invention enters the recess of the base 71. The 1 st wheel, a portion of which protrudes from the lower surface of the lower portion, supports the main body 1 in contact with the bottom surface of the recess of the base 71. The slide plate attached to the lower portion of the main body is supported in contact with the 2 nd wheel partially protruding from the upper surface of the base 71. Therefore, the main body can be stably rotated with safety.

Industrial applicability

The present invention can be used, for example, for an air cleaner in which a main body rotates.

Description of the reference numerals

1: a main body; 2: a support table; 3: a front panel; 4: a side mask; 4 a: a handle portion; 4 b: an appearance sheet; 4 c: a recess; 5: a side mask; 5 a: a handle portion; 5 b: an appearance sheet; 5 c: a recess; 6: a rear face mask; 7: a front body housing; 8: a rear body housing; 7 a: an upper fan case cover; 7 b: an opening is covered on the upper fan box body; 7 c: a lower fan case cover; 7 d: the lower fan box body cover is provided with an opening; 8 a: an upper fan box body; 8 b: a rear panel of the upper fan box body; 8 c: a concave part of the back panel of the upper fan box body; 8 d: a lower fan case; 8 e: a lower fan box body rear panel; 8 f: a concave part of the rear panel of the lower fan box body; 9: an upper fan unit; 10: a lower fan unit; 21: a fan; 22: a motor for a fan; 22 a: a motor rotating shaft for a fan; 23: a motor holding member; 24: a fan; 25: a motor for a fan; 25 a: a motor rotating shaft for a fan; 26: a motor holding member; 27 a: a gasket; 27 b: a gasket; 28: a nut; 29: a lower body shell; 29 a: a drive unit support; 29 b: a position detection mechanism holding section; 29 c: a position detection mechanism holding section; 29 d: a position detection mechanism holding section; 29 e: a main body side wheel holding part; 29 f: a rotation center bearing; 29 g: a flange; 29 h: a flange; 31: a protection net; 32: an upper fan guard; 33: a lower fan guard; 34: a deodorizing filter; 35: a HEPA filter; 36 a: a pre-filter; 36 b: a pre-filter; 40: an upper unit; 41: an operation display unit; 42: an operation substrate unit; 43: an operating switch; 44: an appearance sheet; 45: a human detection sensor; 46: a control substrate unit; 47: a cover; 48: a substrate housing; 49: a control substrate; 49 a: a microcomputer; 49 b: an output circuit; 50: a substrate housing; 51: a cover; 52: a lead cover; 53: a space; 54 a: a front louver driving motor; 54 b: a rear louver driving motor; 55: a power line; 61: an air suction port; 62: a front louver; 63: a rear louver board; 64: a front side delivery port; 65: a rear side delivery port; 66: an air passage; 71: a base station; 71 a: a sliding plate pressing member holding portion; 71 b: a blocking wall; 71 c: a position detection slit; 71 d: a position detection slit; 71 e: a position detection slit; 71 f: a support table side wheel holding section; 71 g: a step portion; 71 h: an annular recess; 71 j: a recess; 71 k: a bottom surface; 72: a rack; 73: a rotation center shaft guide; 74: a sliding plate; 74 a: an opening; 74 b: an edge portion; 75: a sliding plate pressing member; 76: rotating the central shaft; 76 a: a groove-like recess; 77: a body-side wheel (1 st wheel); 78: a support table side wheel (2 nd wheel); 79: a stopper; 80 a: a position detection mechanism; 80 b: a position detection mechanism; 80 c: a position detection mechanism; 81: a main body rotation driving unit; 82: a stepping motor (drive motor); 83: a connecting shaft; 83 a: a through hole for a clutch; 84: a pinion gear; 84 a: a groove for a clutch; 84 b: an inner peripheral wall; 85: a bearing; 86: a holding member; 87: a clutch ball; 88: a spring for the clutch; 89: a base station; 90: a main body; 91: a wheel; 92: a wheel; 100: an air purifier.

Claims

1. An air purifier, wherein the air purifier comprises:

a base having a lower surface, an upper surface disposed in parallel with the lower surface at a distance, and a side surface connecting the lower surface and the upper surface; and

a main body provided above the upper surface of the base and rotatable in a left-right direction with respect to the base,

the main body having a lower body shell forming a lower end of the main body,

a driving unit for rotating the main body is provided at the lower body case,

a recess is provided in a part of the upper surface of the base,

the drive unit has a drive motor, a pinion gear, and a coupling shaft that transmits rotation of the drive motor to the pinion gear,

a part of the lower body case is housed in the recess so as to protrude downward from the upper surface of the base,

the main body is rotatably supported by changing a height by a step portion lowered by one step from an upper surface of the base and a portion near a bottom surface of the recess,

the pinion gear is disposed within the recess,

the lower end of the main body is provided with a 1 st wheel,

a2 nd wheel is provided on the base at a position outside the 1 st wheel and above the 1 st wheel.

2. The air purifier of claim 1,

and a rack is arranged on the inner peripheral wall of the concave part and meshed with the pinion.

3. The air purifier of claim 1 or 2,

a clutch mechanism is provided in a coupling portion where the coupling shaft is coupled to the pinion gear.

4. The air purifier of claim 1 or 2,

a disc-shaped slide plate attached to the lower body case and rotating in accordance with the rotation of the main body,

a plurality of slide plate holders are attached to the base, and the plurality of slide plate holders are arranged with a slight gap from a part of the outer periphery of the slide plate.

5. The air purifier of claim 4,

the sliding plate is provided with an edge part bent downwards on the whole periphery of the outer periphery,

the edge portion enters an annular recess provided in the base.