JP2018079169A - Electric blower and vacuum cleaner having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric blower for suppressing approach of a foreign matter and reducing ventilation resistance, and also to provide a vacuum cleaner having the electric blower.SOLUTION: A rear surface 165 (a suction side surface) of an electric blower 16 faces a filter. An elastic body 163, a recession 162, and a three-dimensional solid lattice arranged in the recession 162 are arranged in the rear surface 165. The three-dimensional lattice includes: multiple rising lattice parts 1611 whose one ends are connected to an inside of an area of the recession 162 on the rear surface 165 and that are extended backward (a suction side) from the one ends; a nearly circular large circle lattice part 1612 connected to the respective other ends of the rising lattice parts 1611; multiple radially extending lattice parts 1613 whose one ends are connected to the large circle lattice part 1612 and that are extended to a nearly center of the large circle lattice part 1612 from the one ends; and a nearly circular small circle lattice part 1614 connected to the respective other ends of the radially extending lattice parts 1613.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electric blower and a vacuum cleaner having the same.

  There is known an electric vacuum cleaner that sucks dust by generating a negative pressure with an electric blower. Patent Document 1 discloses an electric blower having a planar lattice wall 30.

JP 2006-55370 A

  In order to prevent a relatively large solid matter from being sucked into the electric blower and failing or involving a user's finger or the like, the suction port is made into a small opening in the lattice wall 30 as in Patent Document 1. It is often partitioned. However, such a lid-like object such as a lattice leads to a reduction in the opening area of the suction port and increases the pressure loss.

  This invention made | formed in view of the said situation is an electric blower which has a suction opening, Comprising: It has the three-dimensional three-dimensional lattice provided in the suction side of the said suction opening.

1 is a perspective view of a self-propelled electric vacuum cleaner according to Embodiment 1. FIG. It is a perspective view of the state where the upper case and dust case of the self-propelled electric vacuum cleaner concerning Embodiment 1 were removed. It is a bottom view of the self-propelled electric vacuum cleaner according to the first embodiment. (A) AA sectional drawing of FIG. 1, (b) It is an enlarged view of the area | region enclosed with the broken-line frame of (a). 1 is a perspective view of an electric blower according to Embodiment 1. FIG. It is CC sectional view taken on the line of FIG. It is a perspective view of a suction mouth part, a dust sensor unit, and a dust case of a self-propelled electric vacuum cleaner concerning Embodiment 1. FIG. 3 is an exploded view of a suction part, a dust sensor unit, and a dust case of the self-propelled electric vacuum cleaner according to the first embodiment. It is a front view of the dust sensor unit of the self-propelled electric vacuum cleaner concerning Embodiment 1. It is a perspective view of the self-propelled electric vacuum cleaner of the state which removed the dust case concerning Embodiment 1. It is BB sectional drawing of FIG. It is a back perspective view of the main body which attached the dust case which concerns on Embodiment 1. FIG. It is a block diagram which shows the apparatus connected to the control apparatus of the self-propelled vacuum cleaner which concerns on Embodiment 1, and a control apparatus.

  Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Similar components are denoted by the same reference numerals, and the same description will not be repeated. The various components of the present invention do not necessarily need to be composed of one member. For example, one component is composed of a plurality of members, and a plurality of components are composed of one member. , A part of a certain component and a part of another component are allowed to overlap each other.

  Of the directions in which the self-propelled vacuum cleaner 1 (see FIG. 1) travels, the direction in which the self-propelled vacuum cleaner 1 normally travels is forward, the direction opposite to the direction of gravity is upward, and the drive wheels 116 (FIG. 3) are the left and right directions. That is, as shown in FIG. In the present embodiment, a side brush 15 is attached to the front side of the self-propelled electric vacuum cleaner 1.

<Embodiment 1>
[Self-propelled vacuum cleaner 1]
FIG. 1 is a perspective view of a self-propelled electric vacuum cleaner 1 according to the present embodiment.
The self-propelled electric vacuum cleaner 1 is a vacuum cleaner that cleans while moving autonomously in a cleaning area (for example, a room). The self-propelled vacuum cleaner 1 includes an upper case 111 that is an upper wall (and some side walls), a lower case 112 that is a bottom wall (and some side walls), and a bumper 18 that is installed at the front. The main body 11 comprised is provided. In the upper case 111, a switch sheet 22 and a circular operation button 221 and an annular operation button 222 as operation buttons for giving a command to the control unit 2 of the self-propelled electric vacuum cleaner 1 are arranged.

  A dust case 4 is provided on the upper rear side of the self-propelled electric vacuum cleaner 1. The self-propelled electric vacuum cleaner 1 of the present embodiment autonomously drives and cleans the drive wheels 116 by the arithmetic processing of the control device 2, but may be driven by receiving a user's command from a remote controller or the like.

[Lower case 112]
2 is a perspective view with the upper case 111 and the dust case 4 removed, FIG. 3 is a bottom view of the self-propelled electric vacuum cleaner 1, and FIG. 4A is a cross-sectional view taken along the line AA of FIG. 7 is a perspective view of the suction port 113, the dust sensor unit 12, and the dust case 4. FIG.
The lower case 112 includes a drive mechanism housing portion 114 that houses a drive mechanism including a drive wheel 116, a travel motor 1161, an arm 1141, and a speed reduction mechanism 1142, a side brush attachment portion 1121, a travel motor 1161, and a rotation. A thin disc-like shape to which the brush motor 1133, the electric blower 16, the rechargeable battery 19, the battery accommodating portion 115 for accommodating the rechargeable battery 19 (see FIG. 4A), the control device 2, and the suction port 113 are attached. It is a member.

  The lower case 112 includes a bumper frame 1127 provided on the entire side surface or substantially the entire periphery including the lower end side of the side surface, preferably the lower end. The bumper frame 1127 is formed of a material softer than members forming other portions of the side surface, and for example, a resin material such as an elastomer can be employed. Further, the bumper frame 1127 protrudes to the outer peripheral side of the other part of the side surface, for example, the bumper 18. Thereby, even if self-propelled vacuum cleaner 1 collides with furniture etc., it can control that furniture etc. are damaged.

(Balance of self-propelled vacuum cleaner 1)
Among the members provided in the main body 11, those that are relatively heavy are the rechargeable battery 19 and the electric blower 16. The rechargeable battery 19 is often heavier than the electric blower 16. In order to balance the weight of the main body 11 of the present embodiment, first, the electric blower 16 is provided in the approximate center of the lower case 112, and the rechargeable battery 19 is provided on the front side.

  Here, on the rear side of the center of the lower case 112, a suction port 113 that houses the rotating brush 14 and a scraping brush 13 are provided. Since the electric blower 16 is on the center side (between the two drive wheels 116) and the rechargeable battery 19 is on the front side, it is preferable to balance by placing heavy objects on the rear side. For this reason, in this embodiment, a weight is fixed to the inner periphery of the scraping brush 13 by sticking or the like (not shown). Thereby, the dead space in the scraping brush 13 can be utilized effectively.

[Driving mechanism accommodating portion 114]
The drive mechanism housed in the drive mechanism housing portion 114 shown in FIG. 3 and the like is a mechanism that supports the drive wheel 116 on the main body 11. The drive mechanism includes a travel motor 1161, an arm 1141 that supports the drive wheels 116 from the left and right inner sides, and a speed reduction mechanism 1142. The arm 1141 is provided between the two drive wheels 116, and is a member having one end extending in the front-rear direction and the other end connected to the drive wheel 116. This is a member that can rotate each of the drive wheels 116.

[Battery housing 115]
As shown in FIG. 4A and the like, the battery accommodating portion 115 is a space for accommodating the rechargeable battery 19 therein, and is located on the front side of the center of the lower case 112. The battery housing portion 115 is configured to have a downward opening in order to replace the rechargeable battery 19. Note that side brush attachment portions 1121 for attaching the side brush 15 are formed on the left and right sides of the battery housing portion 115.

[Driving wheel 116]
As shown in FIG. 3 and the like, each of the driving wheels 116 is a member that receives the driving force of each of the traveling motors 1161 via each of the speed reduction mechanisms 1142. As a result, the drive wheel 116 itself rotates, so that the main body 11 can be moved forward, backward, and turned. The drive wheels 116 are arranged on both the left and right sides.

[Front lid 117]
The front lid 117 is a substantially rectangular plate-like member that closes the opening of the battery housing portion 115 formed on the front end side of the lower case 112 from the lower surface of the lower case 112. Further, the front lid 117 includes a circular auxiliary wheel attachment portion 1122 for attaching the auxiliary wheel 17 near the center side of the lower case 112.

[Bumper 18]
The bumper 18 is installed so as to be movable in the front-rear direction, preferably further in the left-right direction, according to the pressing force acting from the outside. The bumper 18 is urged forward by a pair of left and right bumper springs (not shown). When a drag force from an obstacle acts on the bumper spring via the bumper 18, the bumper spring is deformed, and the bumper 18 is allowed to move backward while urging the bumper 18 forward. When the bumper 18 moves away from the obstacle and loses the drag, the bumper 18 returns to its original position by the biasing force of the bumper spring. Incidentally, the backward movement of the bumper 18 (that is, contact with an obstacle) is detected by a bumper sensor (infrared sensor), and the detection result is input to the control device 2. Since the amount of displacement of the bumper 18 varies depending on the contact position of the obstacle or the like, it is also possible to detect the position of the obstacle or the like with respect to the main body 11.

[Scraping brush 13]
The scraping brush 13 is a brush having a flock on a part or almost the entire surface thereof and having an axis in a direction substantially parallel to a rotating brush 14 described later. In this embodiment, the scraping brush 13 is driven to rotate or rotate by contact with the floor surface. To do. In the case of rotation, the rotation range is regulated by providing a stopper or the like. The position of flocking of the scraping brush 13 preferably overlaps with the hair of the carpet when cleaning the carpet. For this reason, the scraping brush 13 can collect | recover so that dust may be scraped off from the carpet surface.

  When the scraping brush 13 is used in such a manner that it is provided with a stopper and is rotated, a predetermined area can be kept in contact with the floor surface and dust can be scraped off. At this time, it is preferable that the area | region which will keep contacting a floor surface among scraping brush 13 is a flat shape. That is, the shape of the scraping brush 13 is a shape obtained by replacing a part of the cylindrical shape with a flat plane as viewed in the axial direction (for example, a shape obtained by cutting a part of a circle with a string or a substantially half-moon shape). Preferably there is.

[Electric blower 16]
4B is an enlarged view of a region surrounded by a broken line frame in FIG. 4A, FIG. 5 is a perspective view of the electric blower 16, FIG. 6 is a sectional view taken along the line CC in FIG. 5, and FIG. It is a perspective view of self-propelled electric vacuum cleaner 1 of the state where 4 was removed.
The electric blower 16 includes a fan having a shaft in the front-rear direction. When the fan is driven to rotate, the air in the dust case 4 is discharged to the outside to generate negative pressure, and the suction port 1131 (suction portion) is formed from the floor surface. 113), and has a function of sucking air through the space in the dust case 4 and the suction port 164 of the electric blower 16. An elastic body 163 is installed on the outer peripheral surface of the electric blower 16. By interposing the elastic body 163 in this manner, the vibration of the electric blower 16 is attenuated and hardly transmitted to the main body 11, and the vibration and noise of the main body 11 can be reduced. In the present embodiment, the electric blower 16 is disposed near the center of the lower case 112.

The electric blower 16 has a rear surface 165 (suction side surface) facing the filter 46. On the rear surface 165, a three-dimensional solid lattice 161 provided in the elastic body 163, the concave portion 162, and the concave portion 162 is disposed.
The three-dimensional lattice 161 surrounds the suction port 164 of the electric blower 16. The suction port 164 is an opening facing a direction perpendicular to the front-rear direction. Here, since the electric blower 16 generates an air flow from the rear to the front, the rear is called the suction side and the front is called the discharge side.

  The concave portion 162 is provided around the suction port 164 and is a region that is recessed forward as compared to the rear surface 163. As illustrated in FIG. 4B, the dent is a smooth shape and has a curvature that increases as it approaches the suction port 164. Thereby, the air flowing around the suction port 164 is rectified, and the ventilation resistance can be reduced.

  The solid lattice 161 has one end connected to the region of the concave portion 162 of the rear surface 165, and a plurality of rising lattice portions 1611 extending from the one end toward the rear (suction side) and the other ends of the rising lattice portions 1611. A large circular lattice portion 1612 having a substantially circular shape, one end connected to the large circular lattice portion 1612, a plurality of radially extending lattice portions 1613 extending from the one end toward the substantial center of the large circular lattice portion 1612, and a diameter A substantially circular small circular lattice portion 1614 connected to the other end of each of the extended lattice portions 1613.

  The path of the air flow toward the suction port 164 includes (1) one that flows along the concave portion 162 and passes between the plurality of rising lattice portions 1611, and (2) a large circular lattice portion 1612, a radially extending lattice portion. 1613 passes between the small circular lattice portion 1614 and the small circular lattice portion 1614. Among these, (1) is a radial lattice portion that functions for an air flow that generally flows along the radial direction, and (2) functions for an air flow that generally flows along the axial direction. It is an axial lattice part. That is, the radial lattice portion is a lattice portion formed including a lattice portion extending along the axial direction, like the rising lattice portion 1611, as exemplified in the present embodiment. In addition, the axial lattice portion is formed to include lattice portions extending along the radial direction or the circumferential direction, such as the large circular lattice portion 1612, the radially extending lattice portion 1613, and the small circular lattice portion 1614. It is a lattice part. Among these, in particular, the axial lattice portion can be formed by using one or more of these three types. For example, the axial lattice portion may be formed using only the plurality of radially extending lattice portions 1613 connected to the rising lattice portion 1611, but the configuration as in the present embodiment is preferable.

  Assuming the case where there is no three-dimensional lattice 161, the suction port 164 has ventilation resistance corresponding to the opening area. However, as in the present embodiment, for example, when the three-dimensional lattice 161 is provided so as to prevent large solids from entering the electric blower 16 through the suction port 164, this corresponds to a part of the opening area being blocked. However, there is a high possibility that the ventilation resistance will increase. In the present embodiment, a three-dimensional solid lattice 161 is employed in order to suppress the entry of foreign matter while suppressing an increase in ventilation resistance. The three-dimensional lattice 161 can take air into the suction port 164 from the plurality of paths described above. That is, the ventilation resistance can be reduced as compared with the case where the grid is planar.

Furthermore, as illustrated in FIG. 4B, the cross-sectional shape along the front-rear direction of each lattice portion constituting the three-dimensional lattice 161 is the following wing shape. First, in the axial direction (front-rear direction), the thickest part exists on the suction side from the center. And it becomes thin as it goes to the edge part on the suction side from the thickest part. Moreover, it becomes thinner as it goes from the thickest part to the discharge side. Comparing the end on the suction side and the end on the discharge side, the end on the suction side is thicker.
By using such a blade shape, the air flow can be rectified to reduce the ventilation resistance.

  Further, since the three-dimensional lattice 161 has a three-dimensional shape, the three-dimensional lattice 161 is likely to protrude rearward by the axial dimension of the rising lattice portion 1611. However, the three-dimensional lattice 161 is provided in the concave portion 162 recessed to the front side. , Its protruding dimension can be reduced or eliminated. Thereby, the front-back dimension of self-propelled electric vacuum cleaner 1 can be shortened by extension. The recesses 162 are preferably provided in a wider range than the three-dimensional lattice 161. If it carries out like this, since an air flow can be made smooth from the area | region upstream from the solid grid 161, it is easy to suppress generation | occurrence | production of a turbulent flow. The depth of the recess 162 is preferably 50% or more, 75% or more, or 100% or more of the height of the three-dimensional lattice 161 from the viewpoint of shortening the front-rear dimension. About an upper limit, 110% or less and 100% or less are preferable.

  The “lattice” here is not limited to a shape in which linear objects intersect in two directions at equal intervals, for example, and the air flow can pass after the opening area of the suction port 164 is partitioned small. Any mode may be used. For example, in addition to what is listed in the present embodiment, a mode in which linear objects are arranged with an interval in one direction may be used, or an aspect in which an interval is arranged in three or more directions may be used. More specifically, a mesh-like object may be used in addition to those exemplified in the present embodiment. The “connection” here is not limited to the fact that the rear surface 165 and the three-dimensional lattice 161 are separate, and may be integrally formed as in the present embodiment.

[Mouthpiece 113]
8 is an exploded perspective view of the suction port 113, the dust sensor unit 12, and the dust case 4. FIG. 9 is a front view of the dust sensor unit 12. FIG.
The suction port 113 is a member in which a suction port 1131 communicating with the dust case 4 is formed and the scraping brush 13 and the rotating brush 14 are accommodated. A rotary brush motor 1133 may be attached to the suction port 113. The upstream side of the suction port 1131 (the rotary brush 14 side) is a space for storing the rotary brush 14 and has a larger cross-sectional area than the suction port 1131.

  In the present embodiment, the air sucked by the negative pressure of the electric blower 16 includes the suction port 1131, the dust sensor unit 12, the duct 42 and the main accumulation chamber 41 of the dust case 4, the dust collection filter 46, the electric blower 16, and And the exhaust port 1126 in this order. The air often contains dust and is blocked by the dust collection filter 46 and stored in the dust case 4. Hereinafter, a direction substantially perpendicular to the suction port 1131 and the frame 121 of the dust sensor unit 12 (a front view direction of the frame 121) is referred to as a main direction. Note that six exhaust ports 1126 are provided in the lower case 112, and six exhaust ports 1126 are positioned between the two drive wheels 116 in the present embodiment.

  The suction port 113 of the present embodiment does not have a portion extending in the main direction from the suction port 1131, but extends in the main direction, for example, like a duct 42 of the dust case 4 described later, and the suction port 113. You may have a suction part duct integral with. In this case, the suction port duct, the dust sensor unit 12 and the duct 42 surround the path from the suction port 1131 to the inside of the dust case 4. In this regard, as will be described later, from the viewpoint of improving the volume of the dust case 4, the length of the suction duct (for example, the length in the main direction) and the length of the frame 121 (for example, the length in the main direction) are included in this path. ), The length of the duct 42 (for example, the length in the main direction) is preferably longer.

[Dust sensor unit 12]
The dust sensor unit 12 is disposed between the suction port 113 and the dust case 4.
The dust sensor unit 12 includes a frame 121, a light emitting unit 122 and a light receiving unit 123 that are provided on the frame 121 and face each other, a contact member 124 attached to the dust case 4 side of the frame 121, and a substrate 127. The dust sensor unit 12 is formed as a separate member from the suction port 113 and the dust case 4. By attaching the frame 121 to the suction port 113 and mounting in this state, the light emitting unit 122, the light receiving unit 123, and the connector 126. The contact member 124 can be attached at the same time. For this reason, the dust sensor unit 12 of this embodiment is excellent in assemblability.

[Dust case 4]
FIG. 11 is a cross-sectional view taken along the line BB of FIG. 7, and FIG. 12 is a rear perspective view of the main body 11 to which the dust case 4 is attached.
The dust case 4 is a container that accumulates dust sucked from the floor via the suction port 1131 (suction port 113). The dust case 4 includes a duct 42 formed on the suction port 1131 side, a main accumulation chamber 41 that mainly accumulates collected dust, a lid 45 that allows the accumulated dust to be taken out from the filter 46 side (upper side), and rotation Then, a backflow suppression valve 44 capable of opening and closing the opening on the lower side (duct 42 side) of the main storage chamber 77 and a foldable handle 43 are provided. The dust case 4 is attached from obliquely upward to obliquely downward of the main body 11.
The backflow suppression valve 44 has a main surface that can close the opening as the other end of the duct 42 and a biasing portion that biases the main surface in a direction in which the main surface is rotated.

  The urging unit is a member that urges the backflow suppression valve 44 in a direction in which the main surface closes the opening, and various known members can be used. For example, a spring can be used. For this reason, the backflow suppression valve 44 closes the other end of the duct 42 when no external force is applied.

  By the downward movement of the dust case 4 accompanying the attachment of the dust case 4 to the main body 11, the backflow suppression valve 44 contacts and slides on a part of the self-propelled electric vacuum cleaner 1, and the main surface opens the opening. Receive force in the direction. Thereby, the backflow suppression valve 44 opens the other end of the duct 42 against the urging force of the urging portion.

  In the state where the dust case 4 is attached to the main body 11, the backflow suppression valve 44 is stored on the upper side of the rotating brush 14. When the dust case 4 is removed from the main body 11, the backflow suppression valve 44 is rotated by the urging force of the urging portion to close the opening at the other end on the duct 42 side. Thereby, even if dust is accumulated in the duct 42, it is possible to prevent the dust from spilling out from the dust case 4.

[Sensors]
FIG. 13 is a schematic configuration diagram showing the control device 2 of the self-propelled electric vacuum cleaner and devices connected to the control device 2. The bumper sensor (obstacle detection means) is a sensor that detects the backward movement of the bumper 18 (that is, contact with the obstacle).

  A distance measuring sensor 210 (obstacle detection means) illustrated in FIG. 2 and the like is an infrared sensor that detects a distance to an obstacle. In the present embodiment, distance measuring sensors are provided at a total of five locations, three at the front and two at the side.

  The distance measuring sensor 210 includes a light emitting unit (not shown) that emits infrared light, and a light receiving unit (not shown) that receives reflected light that is reflected by the infrared light reflected by an obstacle. The distance to the obstacle is calculated based on the reflected light detected by the light receiving unit. In addition, at least the vicinity of the distance measuring sensor in the bumper 18 is formed of resin or glass that transmits infrared rays.

  The floor distance measuring sensor 211 (floor surface detection means) illustrated in FIG. 3 and the like is an infrared sensor that measures the distance to the floor surface, and is installed at four positions on the front, rear, left and right of the lower surface of the lower case 112. . More specifically, it is located on the front side of the auxiliary wheel 17, on the rear side of the rotating brush 14 and the scraping brush 13, on the front side of each drive wheel 116 and on the outer side in the left-right direction.

  By detecting a large step such as a staircase or the like using the floor surface ranging sensor, the self-propelled vacuum cleaner 1 can be prevented from falling (from the staircase or the like). For example, when a level difference of about 30 mm is detected forward by the distance measuring sensor for the floor surface, the control device 2 controls the travel motor to move the main body 11 backward to change the traveling direction.

  The floor surface ranging sensor 211 on the front side of the auxiliary wheel 17 (the front end side of the lower case 112) detects that the distance from the floor surface is far, and the rear side of the rotating brush 14 (the rear end side of the lower case 112). ), The control device 2 may continue to move the main body 11 as it is. This is because, in the case of such a combination of detections, the self-propelled vacuum cleaner 1 is considered to often climb a step. Similarly, the floor surface distance measuring sensor 211 on the front side of the auxiliary wheel 17 detects that the distance from the floor surface is short, and the floor surface element distance sensor 211 on the rear side of the rotating brush 14 is far from the floor surface. When detecting that, the control device 2 may continue to advance the main body 11 as it is. “Near” here is, for example, equal to or less than the distance detected by the floor surface ranging sensor 211 when the self-propelled vacuum cleaner C is traveling on a flat floor surface, For example, when the self-propelled electric vacuum cleaner C is traveling on a flat floor surface, the distance is detected by the floor surface distance measuring sensor 211 that exceeds the distance. In addition, one or two appropriate threshold values may be set and compared with this.

  The rotational speed and rotational angle of the traveling motor 1161 are detected using the traveling motor pulse output shown in FIG. The control device 2 calculates the moving speed and moving distance of the main body 11 based on the rotation speed and rotation angle detected from the travel motor pulse output, the gear ratio of the speed reduction mechanism, and the diameter of the drive wheel 116.

  The traveling motor current measuring instrument is a measuring instrument that measures the current flowing through the armature winding of the traveling motor 1161. Similarly, the electric blower current measuring device measures the current value of the electric blower 16, and the rotating brush motor current measuring device measures the current value of the rotating brush motor 1133. The two side brush motor current measuring devices measure the current value of the side brush motor 152. Each current measuring instrument outputs the measured current value to the control device 2. Using the detection result of the current value, for example, it is possible to detect an abnormality in which a foreign object is entangled with the rotating brush and the rotation stops, and the user can be notified by an operation button.

  Further, when the state of the floor surface on which the main body 11 is traveling is detected from the current value of the rotary brush motor 1133 and the current value of the traveling motor 1161, for example, if it is recognized as being on a carpet, the input of the electric blower 16 is increased and the suction force is increased. Is increased, and on the flooring, the input of the electric blower 16 is set to be small, and control for suppressing the power consumption of the rechargeable battery 19 is performed.

  When dust is detected by the dust sensor unit 12, the input of the electric blower 16 is increased for a certain time. The input increase time of the electric blower 16 is not determined (for example, extended) according to the detected dust amount. Thereby, the power consumption of the electric blower 16 is suppressed. Further, even if dust is detected, the main body 11 is not reversed or reciprocated. Thereby, the fall of a moving speed can be avoided.

[Driver]
The travel motor drive device (left) (right) shown in FIG. 13 is an inverter that drives the left and right travel motors 1161 or a pulse waveform generator by PWM control, and operates according to a command from the control device 2. . The same applies to the electric blower driving device, the rotating brush motor driving device, and the side brush motor driving device (left) (right). Each of these driving devices is installed in the control device 2 (see FIG. 2) in the main body 11.

[Control device 2]
The control device 2 is, for example, a microcomputer (not shown), reads a program stored in a ROM (Read Only Memory) and develops it in a RAM (Random Access Memory), and a CPU (Central Processing Unit) performs various processes. It is supposed to run. The control device 2 executes arithmetic processing in accordance with the signals input from the switch seat 22 (see FIG. 1) and each of the sensors described above, and outputs a command signal to each of the drive devices described above.

  The self-propelled vacuum cleaner according to the present invention has been described in detail with reference to the embodiment. Needless to say, the content of the present invention is not limited to the embodiment, and can be appropriately modified and changed without departing from the spirit of the present invention. In the present embodiment, the self-propelled cleaner has been described as an example, but the same effect can be obtained when applied to canister-type, stick-type and handy-type cleaners.

DESCRIPTION OF SYMBOLS 1 Self-propelled vacuum cleaner 11 Main body 111 Upper case 112 Lower case 1121 Side brush mounting part 1122 Auxiliary wheel mounting part 1126 Exhaust port 1127 Bumper frame 1128 Mounting nail latching part 113 Suction part 1131 Suction port 1133 Rotating brush motor 114 Drive mechanism Housing part 1141 Arm (suspension)
1142 Deceleration mechanism 115 Battery housing part 116 Drive wheel 1161 Traveling motor 117 Front lid 118 Airtight member 12 Dust sensor unit 121 Frame 122 Light emitting part 1221 Light emitting element 123 Light receiving part 1232 Light receiving element 124 Adhering member 125 Wiring 126 Connector 127 Substrate 13 Scraping brush 14 rotating brush 15 side brush 151 side brush holder 152 side brush motor 16 electric blower 161 three-dimensional lattice 1611 rising lattice 1612 large circular lattice portion 1613 radially extending lattice portion 1614 small circular lattice portion 162 concave portion 163 elastic body 164 suction port 165 rear surface ( Suction side)
17 Auxiliary wheel 18 Bumper 19 Rechargeable battery 2 Control device 21 Control board 210 Sensors (ranging sensor)
211 Sensors (ranging sensors for floors)
4 Dust case 41 Main storage chamber 42 Duct 421 Upright portion 43 Handle 44 Backflow suppression valve 45 Lid 46 Filter

Claims (6)

An electric blower having a suction port,
An electric blower comprising a three-dimensional solid lattice provided on the suction side of the suction port. The three-dimensional lattice is
A radial lattice portion extending along the axial direction of the electric blower;
The electric blower according to claim 1, further comprising an axial lattice portion extending along a radial direction and / or a circumferential direction of the electric blower. The radial lattice portion has a rising lattice portion connected at one end to the rear surface where the suction port is provided and extending from the one end toward the suction side,
The electric blower according to claim 2, wherein the axial lattice portion includes a substantially circular circular lattice portion and a radially extending lattice portion extending in a radial direction. The circular lattice portion has a large circular lattice portion connected to the other end of the rising lattice portion, and a small circular lattice portion located inside the large circular lattice portion,
4. The electric blower according to claim 3, wherein one end of the radially extending lattice portion is connected to the large circular lattice portion and the other end is connected to the small circular lattice portion.   The electric blower according to any one of claims 1 to 4, wherein the three-dimensional lattice is located in a recessed area around the suction port. The electric blower according to any one of claims 1 to 5,
An electric vacuum cleaner comprising: a dust case having a filter at a position facing the three-dimensional lattice and being attachable.

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