CN111616640A

CN111616640A - Autonomous electric vacuum cleaner

Info

Publication number: CN111616640A
Application number: CN202010101445.4A
Authority: CN
Inventors: 笹木宏格; 室崎贵大
Original assignee: Toshiba Lifestyle Products and Services Corp
Current assignee: Toshiba Lifestyle Products and Services Corp
Priority date: 2019-02-27
Filing date: 2020-02-19
Publication date: 2020-09-04
Also published as: JP2020137618A

Abstract

The invention provides an autonomous electric vacuum cleaner which can sterilize the accumulated dust in the process of dust collection and can easily sterilize the moved places in the process of dust collection. An autonomous electric vacuum cleaner (1) is provided with: a main body (5) having a suction port (34); an electric blower (38) for generating negative pressure in a suction air passage (39) connected to the suction port (34); a dust container (37) which is a part of the suction air duct (39) and collects dust sucked by the negative pressure acting on the suction port (34); a moving unit (11) for moving the main body (5); a storage tank (16) which is provided in the main body (5) and accumulates electrolyzed water; a first supply unit (18) for supplying the electrolyzed water stored in the storage tank (16) to the outside of the main body (5); and a second supply unit (19) for supplying the electrolyzed water stored in the tank (16) to the intake air passage (39).

Description

Autonomous electric vacuum cleaner

Technical Field

Embodiments of the present invention relate to an autonomous electric vacuum cleaner.

Background

There is known an electric vacuum cleaner including a sterilizer attachable to a suction port of a cleaner body. The sterilizing device generates electrolytic water mist and sends the electrolytic water mist into the paper bag through the suction inlet. The bacteria removing device can be attached to the suction port of the cleaner body without using the electric cleaner for dust collection. Dust accumulated in the paper bag is exposed to the electrolytic mist to be sterilized. At this time, the paper bag contains electrolytic water. The paper bag containing the electrolytic water is sterilized by exposing the air passing through the paper bag to the electrolytic water.

Documents of the prior art

Patent document 1: japanese patent laid-open No. 2006-175043

Disclosure of Invention

Problems to be solved by the invention

In the conventional electric vacuum cleaner, the sterilizer must be attached to the cleaner body at the time of completion of vacuum cleaning.

Therefore, the conventional vacuum cleaner cannot sterilize the inside of the cleaner body during the dust suction. In addition, the conventional vacuum cleaner cannot sterilize the outside of the cleaner body during the dust suction.

Accordingly, the present invention provides an autonomous vacuum cleaner capable of sterilizing the inside and outside of a cleaner body during a dust suction process.

Means for solving the problems

In order to solve the above problem, an autonomous electric vacuum cleaner according to an embodiment of the present invention includes: a main body having a suction port; an electric blower for generating negative pressure in a suction air passage connected to the suction port; a dust collector which is a part of the suction air passage and collects dust sucked by a negative pressure acting on the suction port; a storage tank disposed in the main body and storing electrolyzed water; a first supply unit configured to supply the electrolyzed water stored in the tank to the outside of the main body; and a second supply unit configured to supply the electrolyzed water stored in the tank to the intake air passage.

Drawings

Fig. 1 is a perspective view of an autonomous electric vacuum cleaner according to an embodiment of the present invention.

Fig. 2 is a right side view of the autonomous electric vacuum cleaner of the embodiment of the present invention.

Fig. 3 is a bottom view of the autonomous electric vacuum cleaner of the embodiment of the present invention.

Fig. 4 is a plan view of a sump of the autonomous electric vacuum cleaner according to the embodiment of the present invention.

Fig. 5 is a side view of a sump of the autonomous electric vacuum cleaner according to the embodiment of the present invention.

Fig. 6 is a plan view of a sump of a second example of the autonomous electric vacuum cleaner according to the embodiment of the present invention.

Fig. 7 is a side view of a sump of a second example of an autonomous electric vacuum cleaner according to an embodiment of the present invention.

Fig. 8 is a schematic view of a second supply unit of the autonomous electric vacuum cleaner according to the embodiment of the present invention.

Fig. 9 is a schematic view of a second supply portion of a second example of the autonomous electric vacuum cleaner according to the embodiment of the present invention.

Fig. 10 is a block diagram of an autonomous electric vacuum cleaner of an embodiment of the present invention.

Fig. 11 is a diagram showing an example of the relationship between the amount of water in the tank and the voltage applied to the electrodes in the autonomous vacuum cleaner according to the embodiment of the present invention.

Description of the reference numerals

1 autonomous vacuum cleaner, 5 main body, 6 secondary battery, 8 stations, 9 power cord, 11 moving part, 12 dust suction part, 13 detecting part, 15 control part, 16A, 16B storage tank, 17 electrolyzed water generating part, 18 first supply part, 19A, 19B second supply part, 21 main body shell, 22 buffer, 26 driving wheel, 27 motor, 28 driven wheel, 31 suction dust suction part, 32 dust suction part, 34 suction inlet, 35 rotary brush, 36 brush motor, 37 dust container, 38 electric blower, 39 suction air path, 39u upstream side air path, 39d downstream side air path, 41 exhaust air path, 43 dust suction part, 45 wiping dust suction part mounting part, 51 camera part, 51a shooting element, 51B optical system, 52 approaching detecting part, 53 … contact detection unit, 55 … distance measurement device, 55a … light emitting unit, 55B … light receiving unit, 61 … electrode, 62 … piping, 63 … first supply mechanism unit, 65 … second supply mechanism unit, 66 … third supply mechanism unit, 71 … first supply port, 72 … first on-off valve, 73 … second supply port, 74 … second on-off valve, 75 … first atomizing device, 76 … first water guide path, 77 … second atomizing device, 78 … second water guide path, 79 … water retention body, 80 … moisture absorption unit, 81 … container, 82A, 82B … first container unit, 83A, 83B … second container unit, 85 … water supply port, 86 … cover, 87 … supply port, 88 … meter, 3689 joint, 91 … first shielding device, 3692 dust detector, 3695, … receiving unit 96a, … opening and closing door 96a … opening and closing door unit, … driving … air suction surface of … opening and closing door unit …. 98 … opening and closing motor, 101 … piping, 102 … supply port, 103 … third atomizing device, 105 … second shielding device, 106 … shielding member, 107 … shielding drive section, 108 … shielding motor, 111 … communication section, 111a … transmission section, 111b … reception section, 121 … autonomous movement control section, 122 … detection control section, 123 … map information storage section, 125 … movement control section, 126 … suction dust collection control section, 127 … detection result storage section.

Detailed Description

An autonomous electric vacuum cleaner according to an embodiment of the present invention will be described with reference to fig. 1 to 11. In the drawings, the same or corresponding components are denoted by the same reference numerals.

As shown in fig. 1, an autonomous electric vacuum cleaner 1, a so-called sweeping robot, of the present embodiment autonomously moves by consuming electric power of a secondary battery 6 mounted on a main body 5. The autonomous electric vacuum cleaner 1 moves back and forth on a floor surface (hereinafter, referred to as a "surface f to be cleaned") of a cleaning place (hereinafter, referred to as a "region a to be cleaned"), and moves over the region a to be cleaned to clean the floor. After the dust suction operation, the autonomous electric vacuum cleaner 1 autonomously returns to the station 8 to stand by for the next dust suction operation.

The station 8 can be provided on the surface f of the area a to be cleaned. The station 8 guides the autonomous electric vacuum cleaner 1 to a predetermined position and electrically connects the autonomous electric vacuum cleaner to the predetermined position. The station 8 has a function of a so-called cradle. The station 8 has a power supply line 9 for supplying electric power from a commercial ac power supply to the secondary battery 6 in a state of being connected to the autonomous electric vacuum cleaner 1. The power supply line 9 is a circuit for transmitting power to the secondary battery 6.

The autonomous electric vacuum cleaner 1 returning to the station 8 charges the secondary battery 6, for example, while waiting for the next cleaning operation. In this case, the autonomous electric vacuum cleaner 1 can cope with an abrupt vacuum cleaning operation in response to a request from the user while saving the trouble of charging by the user.

In addition, a solid arrow F in fig. 2 and 3 shows a forward direction of the autonomous electric vacuum cleaner 1.

As shown in fig. 2 and 3, the autonomous electric vacuum cleaner 1 of the present embodiment includes: a main body 5; a moving unit 11 for moving the main body 5; a dust suction unit 12 for sucking dust on a surface f to be cleaned below the main body 5; a detection unit 13 for detecting an object to be detected around the main body 5; a control unit 15 for controlling the operation of the autonomous electric vacuum cleaner 1; and a secondary battery 6 for supplying electric power to each unit of the autonomous electric vacuum cleaner 1.

The autonomous electric vacuum cleaner 1 further includes: a storage tank 16 provided in the main body 5 and storing water; an electrolyzed water generation unit 17 for generating electrolyzed water by electrolyzing the water stored in the tank 16; a first supply unit 18 for supplying the electrolyzed water stored in the tank 16 to the outside of the main body 5; and a second supply unit 19 for supplying the electrolyzed water stored in the tank 16 into the main body 5.

The main body 5 includes a main body case 21 made of, for example, synthetic resin, and a damper 22 provided on a side surface of the main body case 21. The main body case 21 is an outer shell of the main body 5. The damper 22 is provided on a side surface of the main body case 21.

The body 5 has a flat cylindrical shape, in other words a disc shape. The substantially circular body 5 can be suppressed in the turning radius in turning to be smaller than other shapes in plan view. The main body 5 may have a square shape in plan view, or may be a constant-width pattern having a constant diameter, for example, a reuleaux triangle (reuleaux triangle).

The main body case 21 and the sump 16 cooperate to define an outline of the main body 5 in a plan view. In the present embodiment, the main body case 21 and the sump 16 have an outer contour line in the shape of an arc cut by a chord in a plan view. The circular arc-shaped outline of the main body case 21 and the circular arc-shaped outline of the sump 16 are outlines that draw a circle of the main body 5 by the combination of the strings. Even if the main body 5 has a shape other than a circular shape, the outline of the main body 5 is drawn by combining the outline of the main body case 21 and the outline of the sump 16. The sump 16 is preferably housed inside a trajectory drawn by an outline of the main body case 21 when the main body 5 is turned in place (counter-rotation turn).

The height of the main body housing 21 is substantially the same as the height of the sump 16. The height of main body case 21 may be different from the height of sump 16. For example, sump 16 may be higher than main body case 21, and sump 16 may protrude upward. Further, the sump 16 may be recessed with a height lower than that of the main body case 21. Further, the height of sump 16 may be lower than the height of main body case 21, and sump 16 may be mounted on the upper surface of main body case 21. In this case, the upper surface of main body case 21 may have a step-like difference between the portion where sump 16 is mounted and another portion. In a state where tank 16 is mounted on main body case 21, it is preferable that the height of the upper surface of tank 16 substantially matches the height of the upper surface of main body case 21.

The moving unit 11 includes: a plurality of drive wheels 26; a plurality of motors 27 for driving the drive wheels 26 independently; and a driven wheel 28 that supports the main body 5 on the surface f to be cleaned together with the driving wheel 26.

The respective driving wheels 26 transmit the force for moving the main body 5 to the surface f to be cleaned. Each of the drive wheels 26 rotates about an axis extending in the width direction (lateral width direction) of the main body 5. The plurality of drive wheels 26 includes at least one pair of drive wheels 26. The axles of the pair of drive wheels 26 are arranged on substantially the same line. The autonomous electric vacuum cleaner 1 can perform linear movement and rotation by the pair of drive wheels 26. The drive wheel 26 is pressed against the surface f to be cleaned by a suspension device (hereinafter, suspension). The autonomous vacuum cleaner 1 may have an endless track instead of the drive wheel 26.

Each motor 27 drives each drive wheel 26 independently. The autonomous vacuum cleaner 1 moves straight (moves forward or backward) by rotating the left and right drive wheels 26 in the same direction, and rotates (rotates right or left) by rotating the left and right drive wheels 26 in different directions. The autonomous vacuum cleaner 1 can adjust the forward or backward speed by increasing or decreasing the output of the left and right driving wheels 26, and adjust the turning radius by varying the output of the left and right driving wheels 26.

The driven pulley 28 is disposed at a substantially central portion in the width direction of the lower portion of the main body 5 and is a front portion. The driven wheel 28 is a circular rotating body, such as a caster. The driven wheels 28 change their direction as the autonomous electric vacuum cleaner 1 moves forward, backward, and rotates, and stabilize the movement of the autonomous electric vacuum cleaner 1. The center of gravity of the autonomous vacuum cleaner 1 supported by the driving wheels 26 and the driven wheels 28 is preferably disposed inside a triangle formed by the pair of driving wheels 26 and the driven wheels 28. This enables the autonomous electric vacuum cleaner 1 to move stably.

The dust suction unit 12 sucks dust on the surface f to be sucked directly below and around the main body 5. The dust suction part 12 includes: a suction dust suction unit 31 for generating negative pressure to suck dust on the dust suction surface f; and a wiping and dust collecting unit 32 for wiping and collecting dust or polishing dust on the surface f to be cleaned below the main body 5.

The suction/dust collection unit 31 includes: a suction port 34 provided on the bottom surface of the main body 5; a rotary brush 35 disposed at the suction port 34; a brush motor 36 for rotationally driving the rotary brush 35; a dust container 37 as a dust collecting part provided in the main body 5; and an electric blower 38 accommodated in the main body 5 and fluidly connected to the dust container 37.

The air passage extending from suction port 34 to the suction side of electric blower 38 through dust container 37 is a suction air passage 39 fluidly connected to the suction side of electric blower 38. The intake air passage 39 includes: an upstream air passage 39u extending from the suction port 34 to the dust container 37; and a downstream air passage 39d extending from the dust container 37 to the electric blower 38.

An air passage extending from the discharge side of electric blower 38 to the discharge port of main body 5 is an exhaust air passage 41 fluidly connected to the discharge side of electric blower 38. The exhaust air from electric blower 38 is discharged to the outside of main body 5 through exhaust air duct 41.

The suction port 34 sucks in dust together with air by a negative pressure generated by the electric blower 38. The suction port 34 is disposed on the front side in the forward direction F of the wiping and dust collecting unit 32. The suction port 34 extends in the width direction of the main body 5. In other words, the opening width of the suction port 34 in the left-right direction is larger than the opening width of the suction port 34 in the front-rear direction. Since the bottom surface of the main body 5 faces and faces the surface f to be cleaned during autonomous movement, the suction port 34 easily sucks in dust on the surface f to be cleaned or dust collected from the surface f to be cleaned by the rotary brush 35.

The rotation center line of the rotating brush 35 is directed in the width direction of the autonomous electric vacuum cleaner 1. When the autonomous electric vacuum cleaner 1 is placed on the surface f to be cleaned in a movable state, the rotary brush 35 contacts the surface f to be cleaned. Therefore, the rotary brush 35 driven to rotate collects dust on the dust suction surface f. The collected dust is efficiently sucked into the suction port 34.

The brush motor 36 rotates the rotary brush 35 forward or backward. The normal rotation direction of the rotating brush 35 is a rotation direction that assists the propulsive force of the autonomous electric vacuum cleaner 1 when the cleaner moves forward. The reverse direction of the rotating brush 35 is a rotating direction that assists the propelling force of the autonomous electric vacuum cleaner 1 when moving backward.

The dust container 37 is a part of the suction air passage 39. The dust container 37 accumulates dust sucked from the suction port 34 by the suction negative pressure generated by the electric blower 38. The dust container 37 is a separator that accumulates dust by inertial separation such as a filter that filters and traps dust, centrifugal separation (cyclone separation), and straight separation (separation method that separates dust from air by a difference in inertial force between straight air and dust). The dust container 37 is detachable from the main body 5. The dust container 37 has a lid that can be opened and closed. The user can detach the dust container 37 from the main body 5, open the cover of the dust container 37, and easily discard the dust stored in the dust container 37, or clean the dust container 37.

The electric blower 38 consumes electric power of the secondary battery 6 and drives the same. The electric blower 38 sucks air from the dust container 37 to generate a suction negative pressure. The negative pressure generated in the dust container 37 acts on the suction port 34. The main body 5 has an exhaust port through which the exhaust air of the electric blower 38 flows out of the main body 5.

The wiping and dust collecting unit 32 is disposed at the bottom of the main body 5 and behind the suction port 34.

In the forward direction (solid arrow F in fig. 2) of the autonomous electric vacuum cleaner 1, the suction port 34 and the wiping and dust collecting member 43 are arranged in front of each other, and the suction port 34 is disposed on the front side of the wiping and dust collecting member 43. Thus, when the autonomous vacuum cleaner 1 moves forward, the suction port 34 moves earlier than the wiping member 43. Therefore, the wiping and cleaning unit 32 wipes and cleans the surface to be cleaned from which the dust is removed by the suction and cleaning unit 31.

The wiping and cleaning unit 32 performs wiping and cleaning or polishing cleaning of the surface f to be cleaned under the main body 5, for example. The wiping and dust collecting unit 32 includes a wiping and dust collecting member mounting portion 45 to which the wiping and dust collecting member 43 is attachable and detachable, and the wiping and dust collecting member 43.

The wiping/dust collecting member attachment portion 45 is a base to which the sheet-like wiping/dust collecting member 43 is attached by a hook and loop fastener, the sheet-like wiping/dust collecting member 43 is wound, or a part of the wiping/dust collecting member 43 is inserted into the insertion port and fixed. The wiping/cleaning member attachment portion 45 is configured to bring the wiping/cleaning member 43 into contact with the surface f to be cleaned in a state where the autonomous vacuum cleaner 1 is placed on the surface f to be cleaned. The wiping/cleaning member attachment portion 45 itself can be attached to and detached from the autonomous vacuum cleaner 1.

The wiping and dust-collecting member 43 is a wiping and dust-collecting sheet made of a fibrous material such as a woven fabric or a nonwoven fabric. The dust-cleaning member 43 is a variety of absorbent dust-cleaning tools such as a wiping sheet, a dust cloth, a wiper, a mop (a fiber mass at the tip other than the handle portion), and the like. The material of the wiping and dust collecting member 43 is natural fibers such as cotton, regenerated fibers such as cellulose, polyamide fibers such as polyester fibers, nylon 6, nylon 66, and nylon 46, and synthetic fibers such as polyolefin fibers such as polyethylene and polypropylene. The dust-wiping member 43 may be a sponge. The dust wiping member 43 may be integrally formed of a super absorbent polymer (SAP, so-called absorbent polymer, super absorbent resin, or polymer absorber). The wiping and dust-collecting member 43 integrally having a member made of a highly water-absorbent polymer can hold a larger amount of electrolyzed water.

The wiping and dust collecting member 43 is attachable to and detachable from the bottom surface of the wiping and dust collecting member mounting portion 45. When the autonomous vacuum cleaner 1 is placed on the surface f to be cleaned in a movable state, the wiping and cleaning unit 32 contacts the surface f to be cleaned. The wiping and cleaning unit 32 is preferably pressed against the surface f to be cleaned with a pressure to such an extent that the driving wheel 26 does not run idle on the surface f to be cleaned. An elastic member such as foamed resin is provided between the wiping and dust suction portion 32 and the bottom surface of the main body 5. The elastic member presses the wiping and dust suction portion 32 against the surface f to be cleaned with a uniform pressure.

The wiping and dust-collecting member 43 is also an embodiment of the first supply unit 18 for supplying the electrolyzed water to the outside of the main body 5. The wiping and dust-collecting member 43 wipes the surface f to be cleaned with water in a wet state by the electrolyzed water supplied from the electrolyzed water forming unit 17.

Further, in the case where the electrolyzed water is supplied to the surface f to be cleaned without passing through the wiping and dust-collecting member 43, the wiping and dust-collecting member 43 can wipe off the electrolyzed water scattered on the surface f to be cleaned.

That is, the wiping/suction member 43 can be used for so-called water wiping in which the electrolytic water is included and is wetted and the electrolytic water is applied to the surface f to be cleaned, and can also be used for so-called wiping in which the electrolytic water scattered on the surface f to be cleaned is wiped off. In other words, the autonomous electric vacuum cleaner 1 disperses or coats the electrolyzed water containing hypochlorous acid on the surface f to be cleaned as it moves, and removes bacteria from the surface f to be cleaned.

Whether wiping by the wiping and dust-collecting member 43 is dry wiping or water wiping depends on the amount of electrolyzed water sprayed from the electrolyzed water generating unit 17 onto the surface f to be cleaned and the amount of electrolyzed water supplied from the electrolyzed water generating unit 17 to the wiping and dust-collecting member 43. For example, if the amount of electrolytic water to be supplied to the floor surface is small, the electrolytic water evaporates before the wiping and dust collecting member 43 becomes wet. In this case, the drying operation by the dust suction wiping part 43 is continued. If the amount of the electrolyzed water to be supplied to the floor surface is large, the electrolyzed water is not completely evaporated and the wiping/suction member 43 is wetted. In this case, the drying based on the wiping of the dust suction part 43 is finally transferred from the drying to the water wiping.

The detection unit 13 detects an object to be detected that approaches the main body 5 as the main body 5 moves, or an object to be detected that is in contact with the main body 5. The detection section 13 includes: a camera unit 51 provided in the main body 5 and configured to photograph an image around the autonomous electric vacuum cleaner 1; an approach detection unit 52 provided in the main body 5 and detecting that the main body 5 approaches an object other than the autonomous electric vacuum cleaner 1, that is, a detected object; and a contact detection unit 53 provided in the main body 5, for detecting that the main body 5 has contacted an object other than the autonomous electric vacuum cleaner 1, that is, a detected object.

The camera unit 51 is provided on the front surface of the main body 5, and photographs the front of the autonomous electric vacuum cleaner 1, that is, the traveling direction when the vehicle travels forward.

The autonomous electric vacuum cleaner 1 may include a distance measuring device 55 for acquiring depth information in an imaging range by a principle different from that of a stereo camera, instead of or in addition to the camera unit 51.

The proximity detection unit 52 is, for example, an infrared sensor or an ultrasonic sensor. The proximity detection unit 52 using an infrared sensor includes a light emitting element that generates infrared light and a light receiving element that receives light and converts the light into an electrical signal. The proximity detection unit 52 emits infrared rays from the light emitting element, receives infrared rays reflected by the object to be detected by the light receiving element, converts the infrared rays into electric power, and detects that the object to be detected approaches within a predetermined distance before the main body 5 comes into contact with the object to be detected when the converted electric power is equal to or higher than a predetermined value. The proximity detection unit 52 using an ultrasonic sensor detects an object to be detected using ultrasonic waves instead of infrared rays.

The contact detection unit 53 is a so-called bumper sensor. The contact detection unit 53 is interlocked with the damper 22 that alleviates the impact on the main body 5 when the moving main body 5 comes into contact with the object to be detected. When the buffer 22 comes into contact with the object, it is displaced so as to be pushed toward the inside of the main body 5. The contact detection unit 53 detects the displacement of the damper 22 and detects that the main body 5 is in contact with the object to be detected. The contact detection unit 53 includes, for example, a micro switch that is turned on and off by displacement of the bumper 22, or an infrared sensor or an ultrasonic sensor that contactlessly measures the displacement amount of the bumper 22.

The secondary battery 6 stores electric power consumed by each unit of the autonomous electric vacuum cleaner 1 including the power supply circuit of the moving unit 11, the dust suction unit 12, the detection unit 13, the control unit 15, and the electrolyzed water generation unit 17. The secondary battery 6 supplies electric power to each unit of the autonomous electric vacuum cleaner 1 including the moving unit 11, the dust suction unit 12, the detection unit 13, and the control unit 15. The secondary battery 6 is, for example, a lithium ion battery, and has a control circuit for controlling charging and discharging. The control circuit outputs information on charging and discharging of the secondary battery 6 to the control unit 15.

The sump 16 is a container for storing water and brine. The water stored in the sump 16 may also be tap water. The sump 16 is preferably attachable to and detachable from the main body 5 in order to improve convenience of water supply. The storage tank 16 includes a lid that can be opened and closed. The storage tank 16 can be easily supplied with water or brine by opening the lid.

The electrolyzed water generation unit 17 is, for example, configured to generate electrolyzed water in which ozone is dissolved by electrolyzing water, or configured to generate electrolyzed water in which Hypochlorous Acid (HClO) is dissolved by electrolyzing brine. In japan, tap water readily available at home contains chlorine according to the regulations of the water channel law. In the waterway law in japan, it is specified that the concentration of chlorine in tap water is one-tenth ppm (parts per million by mass, milligrams per liter) or more (article No. 17, No. 3) based on the waterway law enforcement rule of the waterway law in article 22 (ministry of health and labor). The electrolyzed water generation unit 17 can easily generate electrolyzed water containing hypochlorous acid by electrolyzing tap water in japan. The electrolyzed water generation unit 17 includes: an electrode 61 including a positive electrode and a negative electrode; and a power supply circuit that applies a voltage to the electrode 61 by the electric power supplied from the secondary battery 6.

The electrode 61 of the electrolyzed water forming section 17 is made of a material that is hardly soluble in water, such as titanium or platinum. The electrode 61 may support a platinum group metal such as iridium, platinum, or ruthenium, or an oxide thereof, in order to promote electrolysis. The electrolyzed water generates chemical species such as hydrogen peroxide, active oxygen, OH free radical and the like. An electrode 61 is disposed within the reservoir 16.

The electrolyzed water forming unit 17 may be a 1-chamber type having no partition between the positive electrode and the negative electrode, a 2-chamber type having a partition between the positive electrode and the negative electrode, or a multi-chamber type including a 3-chamber type. The 1-chamber electrolyzed water forming unit 17 neutralizes acidic ionized water formed on the positive electrode side and alkaline ionized water formed on the negative electrode side to form electrolyzed water containing hypochlorous acid at an appropriate concentration. On the other hand, the multi-chamber electrolyzed water forming unit 17 forms acidic ionized water in the chamber containing the positive electrode and forms basic ionized water in the chamber containing the negative electrode.

Further, the 1-compartment type may be suitable for the convenience of the user, compared to the multi-compartment type in which the usage amounts of the acidic ionized water and the basic ionized water become uneven, and a load of treating one of the remaining ionized water is generated.

However, the inventors found that: the surface f to be cleaned can be sterilized by diffusing or spraying electrolyzed water having a hypochlorous acid concentration of 5ppm or more to the surface f to be cleaned at a supply amount of one-tenth microliter per square centimeter or more. Therefore, the electrolyzed water forming section 17 electrolyzes water having a chlorine concentration of one tenth ppm or more, that is, water suitable for tap water in the japanese water channel method, to form electrolyzed water having a hypochlorous acid concentration of 5ppm or more.

The autonomous electric vacuum cleaner 1 may not include the electrolyzed water generation unit 17. That is, the autonomous electric vacuum cleaner 1 may accumulate the generated electrolyzed water in the tank 16 to be used for sterilization of the dust-cleaned area a.

The first supply unit 18 supplies the electrolyzed water so that the electrolyzed water can be diffused or dispersed in the surface f to be cleaned in a supply amount of one-tenth microliter per square centimeter or more. The first supply unit 18 supplies electrolyzed water to at least one of the wiping and dust-collecting member 43 and the surface f to be cleaned. The first supply unit 18 includes: a pipe 62 for leading the electrolyzed water from the tank 16; a first supply mechanism 63 for supplying electrolyzed water from the storage tank 16 to the wiping and dust-collecting member 43; and a second supply mechanism 65 for supplying electrolyzed water from the tank 16 to the surface f to be cleaned. The first supply unit 18 may have any one of the first supply mechanism 63 and the second supply mechanism 65.

The first supply mechanism 63 includes: a first supply port 71 for supplying electrolytic water to the back surface of the dust wiping and sucking member 43; and a first on-off valve 72 provided in the middle of the pipe 62 to shut off supply and supply of the electrolyzed water to the first supply port 71.

The first supply port 71 may be plural. For example, the first supply ports 71 are preferably arranged in a row in the width direction of the main body 5, that is, in the width direction of the wiping and suctioning member 43. The first supply port 71 arranged in this manner can wet a wide area of the wiping and dust suction member 43 by the electrolyzed water. The first supply port 71 may be an elongated, flat opening having a long side extending in the width direction of the main body 5.

The first opening-closing valve 72 is a so-called electromagnetic valve. The first supply mechanism 63 opens the first on-off valve 72 to supply the electrolyzed water by utilizing a head difference, which is a difference in height between the water level of the electrolyzed water in the tank 16 and the first supply port 71. The first supply mechanism 63 may be provided with a pump for pumping up the electrolytic water in the tank 16 instead of the first on-off valve 72. The first supply mechanism 63 may be a flow path, such as a narrow tube or a small hole, through which the electrolytic water in the tank 16 flows. In this case, the inner diameter or the small pore diameter of the narrow tube is appropriately and favorably set so as to obtain a required supply amount (supply amount per unit time) of the electrolyzed water.

The second supply mechanism 65 includes: a second supply port 73 for spraying electrolyzed water onto the surface f to be cleaned; and a second on-off valve 74 provided in the middle of the pipe 62 and configured to supply and shut off the supply of the electrolyzed water to the second supply port 73.

The second supply port 73 is, for example, a nozzle capable of spraying electrolytic water. The electrolyzed water is supplied to the surface f to be cleaned sandwiched between the suction port 34 and the wiping and cleaning member 43. In other words, the first supply unit 18 supplies the electrolyzed water from the second supply port 73 to the surface f to be cleaned sandwiched between the suction port 34 and the wiping and cleaning member 43.

The second supply port 73 may be plural. For example, the second supply ports 73 are preferably arranged in a row in the width direction of the main body 5, i.e., in the width direction of the wiping and suctioning member 43. The second supply port 73 thus arranged spreads the electrolytic water to a wider extent as the main body 5 advances. The second supply port 73 may be an elongated, flat nozzle having a long side extending in the width direction of the main body 5.

The second opening-closing valve 74 is a so-called electromagnetic valve. The second supply mechanism 65 opens the second on-off valve 74 to supply the electrolyzed water by using a head difference, which is a difference in height between the water level of the electrolyzed water in the tank 16 and the second supply port 73. The second supply mechanism 65 may be provided with a pump for pumping up the electrolytic water in the tank 16 in place of the second on-off valve 74. The second supply mechanism 65 may be a flow path, such as a narrow tube or a small hole, through which the electrolytic water in the tank 16 flows. In this case, the inner diameter or the small pore diameter of the narrow tube is appropriately and favorably set so as to obtain a required supply amount (supply amount per unit time) of the electrolyzed water.

The first supply unit 18 includes a third supply mechanism 66 for supplying electrolytic water from the tank 16 to the air around the main body 5. The third supply mechanism 66 includes: a first atomizing device 75 for atomizing the electrolytic water and supplying the atomized electrolytic water to the air around the main body 5; and a first water guide path 76 that guides the electrolyzed water to the first atomizing device 75.

The first atomizer 75 is disposed at the top of the sump 16. The first atomization device 75 diffuses or spreads the atomized electrolyzed water from the top of the storage tank 16 toward the air around the main body 5.

The first atomizing device 75 uses various atomizing methods such as a heating type in which the electrolytic water is heated and atomized, an ultrasonic type in which the electrolytic water is atomized by ultrasonic vibration, a method in which the electrolytic water is atomized by spraying using a venturi effect, for example, an electrostatic atomization in which the electrolytic water is atomized by corona discharge, and a water pulverization type in which the electrolytic water is dispersed by a propeller rotating at a high speed to pulverize water molecules. In either mode, the first atomizing device 75 atomizes the electrolyzed water to include fine particles having a diameter of 100 μm or less, and more preferably atomizes the electrolyzed water to include fine particles having a diameter of 10 μm or less.

The first water guide path 76 is a string or a rope for sucking up the electrolyzed water in the storage tank 16 by capillary action, for example.

The second supply unit 19 supplies the electrolyzed water stored in the tank 16 to the intake air passage 39. The second supply unit 19 may supply the electrolyzed water stored in the tank 16 to the dust container 37 or to the downstream air passage 39d connecting the dust container 37 and the electric blower 38, to the upstream air passage 39u connecting the suction port 34 and the dust container 37. In other words, second feeder 19 supplies the electrolytic water stored in tank 16 to at least one of upstream air passage 39u connecting suction port 34 and dust container 37, the inside of dust container 37, and downstream air passage 39d connecting dust container 37 and electric blower 38.

The second feeder 19 vaporizes the electrolytic water and supplies the electrolytic water to at least one of an upstream air passage 39u connecting the suction port 34 and the dust container 37, the inside of the dust container 37, and a downstream air passage 39d connecting the dust container 37 and the electric blower 38. Therefore, the second supply unit 19 includes: a second atomizing device 77 for atomizing the electrolytic water and supplying the atomized electrolytic water to at least one of the upstream air passage 39u, the dust container 37, and the downstream air passage 39d connecting the dust container 37 and the electric blower 38; and a second water guide path 78 that guides the electrolyzed water from the storage tank 16 to the second atomization device 77.

The second atomizing device 77 may be exposed in the upstream air passage 39u itself or a space continuous with the upstream air passage 39u, may be exposed in the dust container 37 itself or a space continuous with the dust container 37, or may be exposed in the downstream air passage 39d itself or a space continuous with the downstream air passage 39 d. The second atomizing device 77 diffuses or scatters the atomized electrolytic water to at least one of the upstream air passage 39u, the dust container 37, and the downstream air passage 39 d.

Here, "the space connected to the upstream air passage 39 u", "the space connected to the dust container 37", and "the space connected to the downstream air passage 39 d" include a portion in which the suction negative pressure generated by the electric blower 38 acts and the flow of air is sufficiently generated, and include a portion in which the suction negative pressure generated by the electric blower 38 acts and the flow of air due to the suction negative pressure is insufficiently generated and the flow is stagnant.

The second atomizing device 77 is used in various atomizing methods such as a heating type for heating and atomizing the electrolytic water, an ultrasonic type for ultrasonically vibrating and atomizing the electrolytic water, a method for atomizing the electrolytic water by spraying using a venturi effect, for example, electrostatic atomization for atomizing the electrolytic water by corona discharge, and a water pulverization type for pulverizing water molecules by diffusing the electrolytic water by a propeller or the like rotating at a high speed. In either mode, the second atomizing device 77 atomizes the electrolytic water to contain fine particles having a diameter of 100 μm or less, and more preferably atomizes the electrolytic water to contain fine particles having a diameter of 10 μm or less.

The second water channel 78 may be, for example, a pipe connecting the tank 16 and the second atomizing device 77, or may be a rope or a rope that draws up the electrolyzed water in the tank 16 by, for example, capillary action and guides the electrolyzed water to the second atomizing device 77.

In addition to the second atomizing device 77, the second supply unit 19 may include a water retaining member 79 for vaporizing the electrolyzed water in at least one of the upstream air passage 39u connecting the suction port 34 and the dust container 37, the inside of the dust container 37, and the downstream air passage 39d connecting the dust container 37 and the electric blower 38, instead of or in addition to the second atomizing device 77.

The water holding body 79 is connected to the sump 16 via the same or a different water conducting path as the second atomizing device 77. The water holding body 79 absorbs the electrolyzed water supplied through the water guide path and becomes a state containing the electrolyzed water. A portion of water holding body 79 is in contact with the electrolyzed water via the water conducting path connecting sump 16 with water holding body 79. A portion of the water holding body 79 may be in direct contact with the electrolyzed water in the storage tank 16 without passing through the water guiding path. The other part of the water retainer 79 may be exposed in the upstream air passage 39u itself or the space connected to the upstream air passage 39u, the dust container 37 itself or the space connected to the dust container 37, or the downstream air passage 39d itself or the space connected to the downstream air passage 39 d.

The water retention body 79 retains the electrolyzed water by its water absorbability. In addition, the water holding body 79 sucks up the electrolyzed water of the water guiding path connecting the storage tank 16 and the water holding body 79 by its water absorption property. That is, the autonomous vacuum cleaner 1 supplies the electrolytic water to at least one of the upstream air passage 39u connecting the suction port 34 and the dust container 37, the inside of the dust container 37, and the downstream air passage 39d connecting the dust container 37 and the electric blower 38 by bringing the member having water absorption property into contact with the electrolytic water. Even if the supply location of the electrolyzed water (the upstream air passage 39u, the dust container 37, or the downstream air passage 39d) is located higher than the tank 16, the water retaining body 79 can suck up the liquid by capillary action and move it. By changing the degree and size of the water absorption of the water retention body 79, the suction force and height can be adjusted, and the over-supply can be avoided. The water retaining member 79 may be disposed below the sump 16. In this case, the electrolyzed water is easily supplied to the water retaining body 79 by the water head difference.

The water-retaining body 79 is, for example, a woven fabric or a nonwoven fabric. The water-retaining body 79 is made of natural fibers such as cotton, regenerated fibers such as cellulose, polyamide fibers such as polyester fibers, nylon 6, nylon 66, and nylon 46, and synthetic fibers such as polyolefin fibers such as polyethylene and polypropylene. Water retention body 79 may also be a sponge. The water retention member 79 may integrally include a member made of a super absorbent polymer (SAP, so-called absorbent polymer, super absorbent resin, or polymer absorber). The water retaining member 79 integrally having a member made of a highly water-absorbent polymer can retain a larger amount of electrolyzed water.

The electrolytic water is vaporized until the vapor pressure of the gas in the suction air duct 39 reaches the saturated vapor pressure. The vaporized electrolyzed water passes through the intake air passage 39 and reaches the dust container 37, and the dust accumulated in the dust container 37 is sterilized.

The water retaining body 79 can supply the electrolytic water to the dust container 37 by vaporizing the electrolytic water by the flow of air in the upstream air passage 39u and the dust container 37. The electrolytic water vaporized by the flow of air sterilizes the dust accumulated in the dust container 37. Part of the electrolyzed water passes through the dust container 37 by the suction negative pressure and reaches the electric blower 38 to sterilize the exhaust gas of the electric blower 38. The water retaining body 79 vaporizes the electrolytic water by the flow of air in the downstream air passage 39d, passes through the dust container 37, and reaches the electric blower 38 to sterilize the exhaust gas of the electric blower 38. In addition, water retaining body 79 can supply electrolytic water to dust container 37 by vaporizing electrolytic water in upstream air passage 39u, the interior of dust container 37, and downstream air passage 39d in a state where electric blower 38 is stopped. The vaporized electrolyzed water is diffused in the intake air passage 39, and the dust accumulated in the dust container 37 is sterilized.

When second feeder 19 is provided in downstream air passage 39d, the exhaust gas from electric blower 38 can be sterilized by vaporizing the electrolytic water while electric blower 38 is driven. In other words, when the second supply unit 19 is provided in the downstream air passage 39d, the dust accumulated in the dust container 37 can be removed while the total amount of the electrolyzed water after vaporization is used and the electric blower 38 is stopped in order to remove the dust from the exhaust air blown from the autonomous electric vacuum cleaner 1 while the electric blower 38 is being driven.

On the other hand, when the second supplier 19 is provided in the upstream air duct 13u or the dust container 37, the second supplier 19 can supply the electrolyzed water to the dust container 37 by vaporizing the electrolyzed water by the flow of the air in the intake air duct 39. The electrolytic water vaporized by the flow of air in the intake air duct 39 sterilizes the dust accumulated in the dust container 37. Further, a part of the electrolytic water having reached the dust container 37 passes through the dust container 37 by the suction negative pressure, and reaches the electric blower 38 to sterilize the exhaust gas of the electric blower 8.

The autonomous electric vacuum cleaner 1 includes a moisture absorbing portion 80 that is provided in the suction air duct 39 and absorbs the electrolyzed water (moisture) sucked into the suction air duct 39 by the suction negative pressure. When the electrolytic water is sucked into suction air duct 39, moisture absorption unit 80 absorbs the electrolytic water before it reaches electric blower 38, thereby preventing the electrolytic water from reaching electric blower 38. The moisture absorbing part 80 is, for example, a woven fabric or a nonwoven fabric. The material of the moisture absorbing portion 80 is natural fibers such as cotton, regenerated fibers such as cellulose, polyamide fibers such as polyester fibers, nylon 6, nylon 66, and nylon 46, and synthetic fibers such as polyolefin fibers such as polyethylene and polypropylene. The absorbent member 80 may be a sponge. The absorbent part 80 may integrally include a member made of a super absorbent polymer (SAP, so-called absorbent polymer, super absorbent resin, or polymer absorbent). The moisture absorption portion 80 integrally having a high water-absorbent polymer member can hold a larger amount of electrolytic water.

The moisture absorber 80 may be provided in the upstream air passage 39u or the downstream air passage 39d of the intake air passage 39. The moisture absorbing section 80 may be provided in the dust container 37. The moisture absorbing unit 80 may be provided on the downstream side of the second atomizing device 77 and the water retaining body 79 with respect to the flow of air. That is, in suction air duct 39, moisture absorber 80 is closer to electric blower 38 than second atomizing device 77 and water retaining body 79. The moisture absorbing portion 80 may also serve as a filter of the dust container 37 for separating dust from the dust-containing air sucked into the suction air duct 39.

Next, the sump 16 will be described in detail. Note that the same components in the tank 16A of the first example (hereinafter, simply referred to as "tank 16A") and the tank 16B of the second example (hereinafter, simply referred to as "tank 16B") are denoted by the same reference numerals, and redundant description thereof is omitted.

As shown in fig. 4 and 5, the sump 16A according to the first example of the present embodiment has a D-shaped appearance in which a part of the disc-shaped body 5 is cut out in a plan view, and has substantially the same height as the body 5 in a side view. The tank 16A is surrounded by an arc continuous with the side surface of the main body 5 and a chord connecting both ends of the arc. The chord of the sump 16A faces a portion of the outer surface of the main body 5.

The tank 16A includes a plurality of containers 81 that can be separated or coupled. The plurality of containers 81 include a first container portion 82A for storing water before electrolysis and a second container portion 83A for storing the electrode 61 of the electrolyzed water forming unit 17.

The first tank portion 82A and the second tank portion 83A of the tank 16A are horizontally separated and adjacent to each other. The first container portion 82A and the second container portion 83A may be separated in the horizontal direction and coupled to each other in the horizontal direction, or may be separated in the vertical direction and coupled to each other in the vertical direction. The tank 16A that can be separated and coupled in the horizontal direction is coupled by separating the first tank 82A and the second tank 83A horizontally away from each other and approaching each other. The tank 16A that can be separated and coupled in the vertical direction is separated and coupled by sliding the first tank 82A and the second tank 83A in the vertical direction.

The height of the second container portion 83A is substantially the same as the height of the first container portion 82A. The volume of second container portion 83A is smaller than the volume of first container portion 82A. Second pocket portion 83A is a rectangular pocket including a part of the chord portion of sump 16A, and first pocket portion 82A is a pocket having a shape obtained by cutting a rectangle including a part of the chord portion and including the remaining part of the chord portion and the arc portion of sump 16A. The first container portion 82A is coupled to the second container portion 83A so as to shield the left and right side surfaces and the back surface of the second container portion 83A.

Further, the tank 16A is detachable from the main body 5. In other words, the first container portion 82A and the second container portion 83A are integrally attachable to and detachable from the main body 5. The first container portion 82A and the second container portion 83A may be attached and detached independently from each other. Either one of the first container portion 82A and the second container portion 83A may be detachable from the main body 5, and the other may be integral with the main body 5.

By detaching detachable first container portion 82A from main body 5, water supply can be easily performed. In addition, when water is supplied, it is possible to prevent water from spilling onto electric components, such as the electric blower 38, and electronic components, such as the control unit 15, in the main body 5 and causing a failure in these components.

By detaching the detachable second container portion 83A from the main body 5, the electrode 61 and the container itself can be easily cleaned. In addition, during cleaning, it is possible to prevent water from spilling onto electric components, such as the electric blower 38, and electronic components, such as the control unit 15, in the main body 5 and causing a failure in these components.

Tank 16A, which can be attached and detached in an integrated state, can easily perform both the supply of water to first tank 82A and the cleaning of second tank 83A.

A water supply port 85 for introducing water into the container and a cover 86 for opening and closing the water supply port 85 are provided at the top of the first container portion 82A. The user can easily supply water to first container portion 82A by opening lid 86. Further, the user can easily prevent water leakage from the first container portion 82A by closing the lid 86.

A supply port 87 for electrolytic water connected to the first supply unit 18 is provided in the bottom of the second container portion 83A. An air hole for discharging air in the container is provided in the top portion of the second container portion 83A. The air hole may be open to the outside of the second container portion 83A, or may be connected to the first container portion 82A. A water level gauge 88 for detecting the amount of water stored in the second container part 83A, that is, the water level (the level of electrolytic water) is provided inside the second container part 83A.

The water level gauge 88 may be either contact or non-contact. The contact type water level gauge 88 may be of a float type for measuring a water level based on a position of a float (float) provided in the second tank portion 83A in a vertical direction, or of a capacitance type for measuring a water level by detecting capacitance between a pair of electrodes. The noncontact type water level meter 88 can adopt a known method of measuring a water level using radio waves, ultrasonic waves, or light waves, for example.

A joint 89 fluidly connecting the two containers is provided at the bottom of the first container portion 82A and the second container portion 83A. Joint 89 connects the half body on the first container portion 82A side and the half body on the second container portion 83A side to open the passage of water. The half body on the first container portion 82A side and the half body on the second container portion 83A side close the passages in the non-coupled state, and prevent water (electrolytic water) in the container from leaking. It is preferable that the joint 89 is easily connected with the connection of the first container part 82A and the second container part 83A, and easily disconnected with the separation of the first container part 82A and the second container part 83A. For example, in the tank 16A which can be separated and connected in the horizontal direction, the joint 89 has a half body provided at the bottom of the side wall of the first tank portion 82A and a half body provided at the bottom of the side wall of the second tank portion 83A. In the tank 16A which can be separated and connected in the vertical direction, the joint 89 has a half body provided on the bottom wall of either the first container portion 82A or the second container portion 83A, and a half body provided on a connecting pipe extending from the other of the first container portion 82A or the second container portion 83A to the lower side of either the first container portion 82A or the second container portion 83A.

At least, when the water level of the water stored in first container 82A is higher than the water level of the water stored in second container 83A or the electrolyzed water, the water in first container 82A is supplied to second container 83A. In other words, the sump 16A supplies the water stored in the first tank 82A to the second tank 83A due to the head difference between the first tank 82A and the second tank 83A. That is, every time the generated electrolyzed water is consumed in second container unit 83A, the water stored in first container unit 82A is supplied to second container unit 83A. Therefore, the water level of first container portion 82A and the water level of second container portion 83A are balanced with each other.

The electrode 61 of the electrolyzed water forming section 17 is plate-shaped and extends in a vertical direction. In other words, the normal line of the electrode 61 is oriented in the horizontal direction. The electrodes 61 include at least one positive electrode and at least one negative electrode. The positive electrodes and the negative electrodes are alternately arranged in the direction of the normal line thereof.

The positive electrode and the negative electrode of the electrode 61 of the electrolyzed water forming unit 17 can be used as the water level gauge 88. The electrode 61 extending in the vertical direction changes the ratio of the portion immersed in water (in the electrolytic water) to the portion exposed to the gas in the second container portion 83A with a change in the water level (the liquid level of the electrolytic water) of the second container portion 83A. The change in the ratio changes the current value flowing between the positive electrode and the negative electrode of the electrode 61. Therefore, the electrolyzed water generation unit 17 estimates the amount of water stored in the tank 16 based on the change in the current value flowing between the positive electrode and the negative electrode of the electrode 61.

The first supply unit 18, i.e., the first supply mechanism unit 63, the second supply mechanism unit 65, and the third supply mechanism unit 66, is provided in the tank 16A, but may be provided in the main body 5. When the first supply mechanism 63 and the second supply mechanism 65 are provided in the tank 16A, the pipe 62 of the first supply unit 18 is integrated with the tank 16A and reaches the first supply mechanism 63 and the second supply mechanism 65. When the first supply mechanism 63 and the second supply mechanism 65 are provided in the main body 5, the pipe 62 of the first supply unit 18 extends from the tank 16A through the main body 5 to the first supply mechanism 63 and the second supply mechanism 65. When the third supply mechanism 66 is disposed in the sump 16A, the first water guide path 76 of the first supply unit 18 is disposed in the sump 16A and reaches the third supply mechanism 66. When the third supply mechanism 66 is provided in the main body 5, the first water guide path 76 of the first supply unit 18 reaches the third supply mechanism 66 from the sump 16A through the inside of the main body 5.

As shown in fig. 6 and 7, the tank 16B of the second example of the present embodiment includes a first tank 82B for storing water before electrolysis and a second tank 83B for storing the electrodes 61 of the electrolyzed water forming unit 17.

The first tank portion 82B and the second tank portion 83B of the tank 16B are stacked so as to be vertically separated from each other. The first container portion 82B and the second container portion 83B may be separated in the horizontal direction and coupled in the horizontal direction, or may be separated in the vertical direction and coupled in the vertical direction. The tank 16B, which can be separated and coupled in the horizontal direction, is separated and coupled by sliding the first tank 82B and the second tank 83B in the horizontal direction. The tank 16B, which can be separated and coupled in the vertical direction, is coupled by separating the first tank 82B and the second tank 83B in the vertical direction and approaching each other in the vertical direction.

The shape of the second container portion 83B is substantially the same as the shape of the first container portion 82B in plan view. The height of the second container portion 83B is lower than the height of the first container portion 82B. The volume of second container portion 83B is smaller than the volume of first container portion 82B. The first container portion 82B is connected to the second container portion 83B so as to shield the top surface of the second container portion 83B.

Further, the tank 16B is detachable from the main body 5. In other words, the first container portion 82B and the second container portion 83B are integrally attachable to and detachable from the main body 5. The first container portion 82B and the second container portion 83B may be attachable and detachable independently. Either one of the first container portion 82B and the second container portion 83B may be detachable from the main body 5, and the other may be integral with the main body 5.

By detaching detachable first container portion 82B from main body 5, water supply can be easily performed. In addition, when water is supplied, it is possible to prevent water from spilling onto electric components, such as the electric blower 38, and electronic components, such as the control unit 15, in the main body 5 and causing a failure in these components.

By detaching the detachable second container portion 83B from the main body 5, the electrode 61 and the container itself can be easily cleaned. In addition, during cleaning, it is possible to prevent water from spilling onto electric components, such as the electric blower 38, and electronic components, such as the control unit 15, in the main body 5 and causing a failure in these components.

Tank 16B, which is detachable in an integrated state, can easily perform both the supply of water to first tank 82B and the cleaning of second tank 83B.

A water supply port 85 for introducing water into the container and a cover 86 for opening and closing the water supply port 85 are provided on the top of the first container portion 82B. The user can easily supply water to first container portion 82B by opening lid 86. Further, the user can easily prevent water leakage from first container portion 82B by closing lid 86.

A supply port 87 for electrolytic water connected to the first supply unit 18 is provided in the bottom of the second container portion 83B. An air hole for discharging air in the container is provided in the top portion of the second container portion 83B. The air hole may be open to the outside of the second container portion 83B, or may be connected to the first container portion 82B. A water level gauge 88 for measuring the water level (amount of water, amount of electrolyzed water) in the second container 83B is provided inside the second container 83B.

Fittings 89 fluidly connecting the two containers are provided at the bottom of first container portion 82B and at the top of second container portion 83B. Joint 89 connects the half body on the first container portion 82B side and the half body on the second container portion 83B side to open the passage of water. The half body on the first container portion 82B side and the half body on the second container portion 83B side close the passages in the non-coupled state, and prevent water (electrolyzed water) in the container from leaking. It is preferable that the joint 89 is easily coupled with the coupling of the first container portion 82B and the second container portion 83B, and is easily opened with the separation of the first container portion 82B and the second container portion 83B. For example, in tank 16B that can be separated and connected in the vertical direction, joint 89 has a half provided on the bottom wall of first tank 82B and a half provided on the ceiling wall of second tank 83B. In the tank 16B which can be separated and connected in the horizontal direction, the joint 89 has a half body provided on one of the bottom portion of the side wall of the first container portion 82B and the top portion of the bottom wall of the second container portion 83B, and a half body provided on a connecting pipe extending from the other of the first container portion 82B and the second container portion 83B to the side of one of the first container portion 82B and the second container portion 83B.

The sump 16B supplies the water stored in the first tank 82B to the second tank 83B by a head difference, which is a difference in height between the first tank 82B and the second tank 83B. The water stored in the first container portion 82B is supplied to the second container portion 83B every time the generated electrolyzed water is consumed in the second container portion 83B. In the sump 16A of the first example, the water level of the first tank 82A and the water level of the second tank 83A are continuously balanced with each other, and in the sump 16B of the second example, the second tank 83A is maintained at full water while water remains in the first tank 82B.

The electrode 61 of the electrolyzed water forming section 17 is plate-shaped and extends to extend in the horizontal direction. In other words, the normal line of the electrode 61 is directed in the vertical direction. The electrodes 61 include at least one positive electrode and at least one negative electrode. The positive electrodes and the negative electrodes are alternately arranged in the normal direction thereof.

The first supply unit 18, i.e., the first supply mechanism unit 63, the second supply mechanism unit 65, and the third supply mechanism unit 66, may be provided in the tank 16B or in the main body 5. When the first supply mechanism 63 and the second supply mechanism 65 are provided in the tank 16B, the pipe 62 of the first supply unit 18 is integrated with the tank 16B and reaches the first supply mechanism 63 and the second supply mechanism 65. When the first supply mechanism 63 and the second supply mechanism 65 are provided in the main body 5, the pipe 62 of the first supply unit 18 extends from the tank 16B through the inside of the main body 5 to reach the first supply mechanism 63 and the second supply mechanism 65. When the third supply mechanism 66 is disposed in the sump 16B, the first water guide path 76 of the first supply unit 18 is disposed in the sump 16B and reaches the third supply mechanism 66. When the third supply mechanism 66 is provided in the main body 5, the first water guide path 76 of the first supply unit 18 extends from the sump 16B through the inside of the main body 5 to reach the third supply mechanism 66.

The autonomous electric vacuum cleaner 1 can store the generated electrolyzed water in the tank 16. In this case, the sump 16 may not include the plurality of containers 81. That is, the storage tank 16 may be a single tank. In the case where the autonomous vacuum cleaner 1 does not include the electrolyzed water forming unit 17, the water supply port 85 of the tank 16 is used as a liquid supply port capable of replenishing the formed electrolyzed water.

Next, the second supply unit 19 will be described in detail. In the second supply unit 19A of the first example (hereinafter simply referred to as "second supply unit 19A") and the second supply unit 19 of the second example (hereinafter simply referred to as "second supply unit 19B"), the same components are denoted by the same reference numerals, and redundant description is omitted.

As shown in fig. 8, the second supply unit 19A of the autonomous electric vacuum cleaner 1 according to the present embodiment includes a first shutter device 91 that restricts a period during which electrolyzed water is supplied.

The first shutter device 91 can limit the period of supplying the electrolyzed water to a predetermined period. For example, the period of time during which the electrolytic water is supplied is limited based on the presence or absence of dust passing through the upstream air passage 39u and the amount of dust accumulated in the dust container 37.

For example, when dust passes through upstream air passage 39u, first shutter 91 blocks air flow between upstream air passage 39u and second atomizing device 77 to prevent electrolytic water from being supplied into upstream air passage 39u, and when the other condition is not met, for example, when electric blower 38 is stopped and suction negative pressure is not generated, second atomizing device 77 can be exposed to upstream air passage 39u to supply electrolytic water into upstream air passage 39 u.

Further, the first shutter device 91 blocks the air flow between the inside of the dust container 37 and the second atomizer 77 to prevent the electrolytic water from being supplied into the dust container 37 when the amount of accumulated dust in the dust container 37 is less than, for example, half of the full cup, that is, 50%, and can expose the second atomizer 77 in the dust container 37 to supply the electrolytic water into the dust container 37 when the amount of accumulated dust in the dust container 37 is not less than, for example, 50%.

The dust detector 92 is used to detect the passage of dust in the upstream air passage 39u and the amount of dust accumulated in the dust container 37. The dust detector 92 includes, for example: a light emitting element; and a light receiving element for detecting the light emitted from the light emitting element. The dust detector 92 detects a change in the amount of light that has passed through the upstream air passage 39u, and detects the presence or absence of dust flowing in the upstream air passage 39 u. The dust detector 92 detects the presence or absence of dust passing through the upstream air passage 39u by detecting the frequency and time of light emitted by the light-emitting element when dust passing through the upstream air passage 39u is blocked by a light-receiving element. The dust detector 92 detects a change in the amount of light that has passed through the dust container 37, and detects the amount of dust accumulated in the dust container 37. The dust detector 92 detects the frequency and time of light emitted by the light-emitting element when dust accumulated in the dust container 37 blocks the light, thereby detecting the amount of dust accumulated in the dust container 37. Since the dust detector 92 detects the presence or absence of dust by light, the pressure loss in the upstream air passage 39u is not increased, or the capacity of the dust container 37 is not reduced.

The first shielding device 91 includes: a housing portion 95 defining a space continuous with the upstream air passage 39u and housing the second atomizing device 77; an openable/closable door portion 96 that allows or blocks ventilation between the storage portion 95 and the upstream air passage 39 u; and an opening/closing drive unit 97 for opening and closing the door 96.

The storage portion 95 may store the water retaining body 79 in place of or in addition to the second atomizing device 77.

The gate portion 96 is provided at a boundary portion between the upstream air passage 39u and the accommodating portion 95. The door portion 96 is preferably a sliding door, for example. The sliding door is easier to secure a space necessary for opening and closing than a hinge door. The gate portion 96 may be a bellows gate (shutter). The shutter can further save space in a region required for opening and closing, as compared with a sliding door.

The surface 96a of the gate portion 96 on the upstream air passage 39u side is preferably continuous with the inner surface of the upstream air passage 39 u. Since the surface 96a of the gate 96 on the upstream air passage 39u side is continuous with the inner surface of the upstream air passage 39u, disturbance of the flow on the downstream side of the gate 96 is suppressed, and resistance in opening and closing the gate 96 can be suppressed.

The gate portion 96 cuts off the ventilation between the upstream air passage 39u and the accommodating portion 95 in the closed state, and allows the ventilation between the upstream air passage 39u and the accommodating portion 95 in the open state. If the ventilation between the upstream air passage 39u and the storage unit 95 is cut off, the electrolytic water atomized by the second atomizer 77 is not supplied to the upstream air passage 39 u. When the ventilation between the upstream air passage 39u and the storage unit 95 is permitted, the electrolytic water atomized by the second atomizer 77 is supplied to the upstream air passage 39 u.

The opening/closing drive unit 97 includes a drive source for opening/closing the door unit 96, for example, an opening/closing motor 98. The opening/closing motor 98 transmits a driving force for opening/closing the door portion 96 via, for example, a gear provided on the output shaft and a rack provided on the door portion 96.

The first shutter device 91 can also be applied to the second supply unit 19 that supplies electrolytic water to the dust container 37. In other words, the first shutter device 91 may include: a housing portion 95 defining a space connected to the dust container 37 and housing the second atomizing device 77; an openable/closable door portion 96 that allows or blocks ventilation between the housing portion 95 and the dust container 37; and an opening/closing drive unit 97 for opening and closing the door 96.

As shown in fig. 9, the second supply unit 19B of the autonomous electric vacuum cleaner 1 according to the present embodiment supplies the electrolyzed water to the suction air passage 39 from the outside of the suction port 34 by the flow of the air sucked by the negative pressure acting on the suction port 34.

In fig. 9, the first supply unit 18 is not shown.

The second supply portion 19B supplies the electrolyzed water from the bottom surface of the main body 5 toward the suction port 34. The second supply unit 19B includes: a pipe 101 connected to the tank 16; a supply port 102 disposed on the bottom surface of the main body 5 and discharging electrolytic water; and a third atomizing device 103 for atomizing the electrolyzed water in the pipe 101. That is, the second supply unit 19B of the second embodiment supplies the electrolytic water from the suction port 34 connected to the upstream air passage 39u, instead of supplying the electrolytic water to the upstream air passage 39u and the dust container 37 in the main body 5, as in the second supply unit 19A of the first embodiment. That is, the second supply unit 19B of the second example supplies the electrolyzed water only to the vicinity of the suction port 34, and sucks the electrolyzed water by the suction negative pressure acting on the suction port 34. Therefore, the second feeder 19B of the second embodiment does not need to have a water guide path connected to the upstream air passage 39u, the dust container 37, and the downstream air passage 39d in the main body 5, as in the second feeder 19A of the first embodiment.

The second supply unit 19B includes a second shutter device 105 that restricts the period of supplying the electrolyzed water.

The third atomizing device 103 is of various atomizing methods such as a heating type for heating and atomizing the electrolytic water, an ultrasonic type for ultrasonically vibrating and atomizing the electrolytic water, a method for atomizing the electrolytic water by spraying using a venturi effect, for example, an electrostatic atomization for atomizing the electrolytic water by corona discharge, and a water pulverization type for pulverizing water molecules by diffusing the electrolytic water with a propeller rotating at a high speed. In either mode, the third atomizing device 103 atomizes the electrolytic water so as to contain fine particles having a diameter of 100 μm or less, and more preferably atomizes the electrolytic water so as to contain fine particles having a diameter of 10 μm or less.

The supply port 102 is, for example, a nozzle capable of spraying electrolytic water. The supply port 102 may be plural. For example, the supply ports 102 are preferably arranged in a row in the width direction of the suction port 34. The supply port 102 may be an elongated, flat nozzle having a long side in the width direction of the suction port 34.

The second shade device 105 includes: a shielding member 106 provided in the vicinity of the suction port 34 with respect to the supply port 102; and a shutter driving unit 107 for driving the shutter member 106.

The shielding member 106 is a sheet made of synthetic rubber such as natural rubber or silicone rubber. The shielding member 106 preferably extends continuously over the entire width of the opening width of the suction port 34. The blocking member 106 is movable between a protruding position (the blocking member 106 shown by a solid line in fig. 9) where it contacts the surface f to be cleaned and blocks the flow of air sucked from the supply port 102 to the suction port 34, and a storage position (the blocking member 106 shown by a two-dot chain line in fig. 9) where it is separated from the surface f to be cleaned and allows the flow of air sucked from the supply port 102 to the suction port 34. The shielding member 106 at the protruding position shields the electrolytic water discharged from the supply port 102 before the electrolytic water reaches the suction port 34.

The shield driving unit 107 includes a driving source, for example, a shield motor 108, which projects and retracts the shield member 106. The shield motor 108 transmits a driving force for moving the shield member 106 in and out via a gear provided on the output shaft and a rack provided on the shield member 106, for example.

The second supply mechanism 65 of the first supply unit 18 that supplies the electrolyzed water from the sump 16 to the surface f to be cleaned may also serve as the second supply unit 19B. In this case, a part of the electrolyzed water supplied from the second supply port 73 of the second supply mechanism 65 to the surface f to be cleaned is supplied from the outside of the suction port 34 to the suction air passage 39 by the flow of the air sucked by the negative pressure acting on the suction port 34. The second blocking device 105 restricts the supply period of the electrolyzed water sucked from the second supply port 73 of the second supply mechanism unit 65 to the suction port 34.

As shown in fig. 10 in addition to fig. 2 to 3, the autonomous electric vacuum cleaner 1 of the present embodiment includes a communication unit 111 in addition to the motor 27 of the moving unit 11, the brush motor 36 and the electric blower 38 of the suction/dust-cleaning unit 31, the detection unit 13, the control unit 15, the secondary battery 6, the electrolyzed water generation unit 17, and the first supply unit 18.

The communication unit 111 includes a transmission unit 111a for transmitting an infrared signal to the station 8, a reception unit 111b for receiving an infrared signal transmitted by the station 8 and a remote controller. The transmission unit 111a includes, for example, an infrared light emitting element. The receiving portion 111b includes, for example, a phototransistor.

The camera unit 51 of the detection unit 13 is, for example, a digital camera. That is, the camera unit 51 includes an image pickup device 51a (image sensor) that converts an image picked up into an electric signal, and an optical system 51b that forms an image on the image pickup device 51a and generates an image. The image sensor 51a is, for example, a CCD image sensor (Charge-Coupled Device image sensor) or a CMOS image sensor (Complementary metal-oxide-semiconductor image sensor). Therefore, the autonomous electric vacuum cleaner 1 can immediately process the digital data of the image captured by the camera section 51. That is, the image captured by the camera unit 51 can be compressed into a predetermined data format, converted into a binary image, or converted into a grayscale by an image processing circuit, for example. The camera unit 51 captures an image in a visible light region, for example. An image in the visible light region has better image quality than an image in the infrared region, for example, and information that can be visually recognized can be easily provided to a user without performing complicated image processing.

The camera section 51 is a so-called stereo camera. The camera unit 51 superimposes the captured images on each other within a capturing range including a front position where a center line of the autonomous electric vacuum cleaner 1 in the width direction is extended. The camera unit 51 can obtain information of the depth (the separation distance viewed from the autonomous electric vacuum cleaner 1) within the imaging range. An image containing depth information is referred to as a "distance image".

The camera unit 51 may be provided with an illumination device such as an led (light Emitting diode) or a bulb in parallel. The illumination device illuminates a part or all of the imaging range of the camera unit 51. The lighting device is capable of causing the camera unit 51 to acquire an appropriate image even in a dark place such as a shadow of an obstacle such as furniture or in a dark environment such as at night.

A large number of pixels are arranged on the light receiving surface of the imaging element 51 a. Each pixel of the light receiving surface converts received light into an electrical signal. The information of the light received by each pixel is combined according to the position of each pixel, thereby obtaining an image representing the scene captured by the camera unit 51. The general imaging element 51a images a color image. The color image is expressed by mixing three colors of red, green, and blue, for example.

The distance measuring device 55 includes a light emitting unit 55a that emits light to a range in which depth information is to be obtained, and a light receiving unit 55b that receives reflected light of the light emitted from the light emitting unit 55 a. The autonomous electric vacuum cleaner 1 can acquire distance information from the autonomous electric vacuum cleaner 1 to the object to be detected based on a time difference between when the light emitting section 55a starts emitting light and when the light receiving section 55b receives the reflected light. The light emitting section 55a emits infrared light or visible light, for example.

The control unit 15 includes, for example: a Central Processing Unit (CPU); an auxiliary storage device (for example, Read Only Memory: ROM) for storing various operation programs, parameters, and the like executed (processed) by the central processing unit; and a main storage device (e.g., Random access memory: RAM) that dynamically secures a work area of the program. The auxiliary storage device is preferably a rewritable storage device such as a nonvolatile memory.

The control unit 15 is electrically connected to the motor 27 of the moving unit 11, the brush motor 36 and the electric blower 38 of the suction/dust collection unit 31, the detection unit 13, the secondary battery 6, the first shielding device 91, the dust detector 92, the second shielding device 105, and the communication unit 111. The control unit 15 controls the motor 27 of the moving unit 11, the brush motor 36 and the electric blower 38 of the suction/dust-suction unit 31, the detection unit 13, and the secondary battery 6 in accordance with instructions received from the station 8 and the remote controller via the communication unit 111, and performs autonomous operation and autonomous movement of the autonomous electric vacuum cleaner 1.

The control unit 15 includes an autonomous movement control unit 121 that controls autonomous movement of the autonomous electric vacuum cleaner 1, and a detection control unit 122 that controls the operation of the detection unit 13. The autonomous movement control unit 121 and the detection control unit 122 are calculation programs.

The autonomous movement control unit 121 includes: a Map information storage unit 123 that stores Environment Map information (Environment Map) of the dust collection area a; a movement control unit 125 for controlling the operation of the motor 27 of the moving unit 11; and a suction/dust collection control unit 126 for controlling the operations of the brush motor 36 and the electric blower 38 of the suction/dust collection unit 31.

The map information storage unit 123 is a set of data constructed in a storage area secured in the auxiliary storage device, and has an appropriate data structure. The map information storage unit 123 is read from the auxiliary storage device into the main storage device and used, and is overwritten to the auxiliary storage device through appropriate updating.

The environment map information is information used for autonomous movement of the autonomous electric vacuum cleaner 1, and includes the shape of an area in which the autonomous electric vacuum cleaner 1 can move, at least in a place to be cleaned. The environment map information is constructed, for example, as a set of rectangles having one side of 10 centimeters that are neatly arranged. The environment map information may be information prepared in advance when the autonomous electric vacuum cleaner 1 is used, or may be information created while estimating its own position by Simultaneous Localization and mapping (SLAM). The environment map information may be created and updated during the movement accompanying the dust suction operation. When environment map information is created by SLAM, the autonomous electric vacuum cleaner 1 preferably includes various sensors such as an encoder in addition to the detection unit 13. The movement control unit 125 creates environment map information based on information acquired from the detection unit 13 and various sensors.

The movement control unit 125 controls the moving unit 11 based on the environment map information to autonomously move the autonomous electric vacuum cleaner 1. The movement control unit 125 controls the magnitude and direction of the current flowing to the motor 27 to rotate the motor 27 in the normal direction or the reverse direction. The movement control unit 125 controls the driving of the driving wheels 26 by rotating the motor 27 forward or backward.

The suction/dust collection control unit 126 controls the brush motor 36 and the electric blower 38 independently of each other. The suction/dust collection control unit 126 controls the first shutter 91 of the second supply unit 19A and the second shutter 105 of the second supply unit 19B. The suction/dust collection control unit 126 controls the first shutter device 91 (or the second shutter device 105) based on the detection result of the dust detector 92, and switches between supply and interruption of supply of electrolytic water to the dust container 37.

The detection control unit 122 controls the operation of the camera unit 51. The detection control unit 122 causes the camera unit 51 to capture images at predetermined time intervals. The detection control unit 122 stores the image captured by the camera unit 51 in the detection result storage unit 127. The image captured by the camera unit 51 is secured to the main storage device by the detection result storage unit 127. The detection result storage unit 127 stores the image captured by the camera unit 51. The detection result storage unit 127 has a capacity capable of storing a plurality of images.

The detection result storage unit 127 may store image information representing an image captured by the camera unit 51 without processing, or may store image information processed so as to reduce the data size while retaining information necessary for the analysis processing of the image as much as possible. The image information stored in the detection result storage unit 127 may be, for example, an image obtained by converting an image captured by the camera unit 51 into a grayscale (hereinafter, referred to as an "image" as in the case of the original image captured by the camera unit 51). In the case of a grayscale image, the pixel values of the image coincide with the luminance values. When storing an image converted into a grayscale, the control unit 15 may be able to reduce the capacity of the memory area allocated to the detection result storage unit 127, that is, the resource, to a smaller amount than when storing the original image. In addition, when the image converted into the gray scale is used for the subsequent analysis processing, the control unit 15 can reduce the load on the central processing unit as compared with the case of processing the original image. Image processing including image graying may be performed by the camera unit 51. The camera unit 51 performs image processing, thereby reducing the load on the central processing unit.

Further, the detection control unit 122 controls turning on and off of the lighting device. The illumination device brightens the image, facilitates the analysis process, and improves the accuracy.

The detection control unit 122 also stores the detection result of the proximity detection unit 52, that is, the proximity of the object to be detected to the main body 5, and the separation distance between the object to be detected and the main body 5 at that time, in the detection result storage unit 127.

The detection control unit 122 also stores the detection result of the contact detection unit 53, that is, the contact of the subject with the main body 5 in the detection result storage unit 127.

While the moving unit 11 moves the main body 5, the electrolyzed water generating unit 17 applies a voltage between the positive electrode and the negative electrode of the electrode 61, and electrolyzes the water stored in the tank 16 (tank 16A, tank 16B) by the electric power of the secondary battery 6 to generate electrolyzed water. Here, the electrolyzed water generating unit 17 may generate electrolyzed water while the moving unit 11 moves the main body 5, or may generate electrolyzed water for a predetermined period of time while the moving unit 11 moves the main body 5. The predetermined period is not particularly limited and can be set as appropriate. The predetermined period of time may be determined, for example, based on the concentration of hypochlorous acid contained in the generated electrolyzed water, the amount of water stored in tank 16 (

tanks

16A and 16B), the remaining amount of secondary battery 6, and the like, as described in detail below.

The electrolyzed water generating unit 17 may generate electrolyzed water by applying a voltage between the positive electrode and the negative electrode of the electrode 61 while the moving unit 11 does not move the main body and electrolyzing water stored in the tank 16 (tank 16A, tank 16B) by the electric power of the secondary battery 6. For example, when the main body is in a stopped state in the dust suction area a or in a state in which the main body is connected to the station 8, a voltage may be applied between the positive electrode and the negative electrode of the electrode 61 to generate electrolyzed water.

However, in the sump 16A, when the water level of the second tank portion 83A is lower than the water level of the first tank portion 82A, the water in the first tank portion 82A is immediately supplied to the second tank portion 83A by the head difference. In the sump 16B, when the water level of the second tank 83B is not full, the water in the first tank 82A is immediately supplied to the second tank 83B by the head difference. Therefore, when the water or the electrolyzed water in the tank 16 is insufficient, if the water is replenished to the

first container parts

82A, 82B, the water before electrolysis flows into the

second container parts

83A, 83B in general, and the hypochlorous acid concentration of the electrolyzed water in the

second container parts

83A, 83B decreases.

Therefore, it is preferable that the electrolyzed water forming unit 17 starts the formation of the electrolyzed water before the movement of the main body 5 by the movement unit 11 so that the electrolyzed water containing hypochlorous acid of a desired concentration can be obtained before the movement of the main body 5 is started. For example, the electrolyzed water forming unit 17 starts the formation of electrolyzed water before the moving unit 11 moves the main body 5, so that the time for obtaining electrolyzed water having a desired concentration, for example, hypochlorous acid of 5ppm or more, can be secured in a state where the

second container portions

83A, 83B are filled with water before electrolysis. For example, the electrolyzed water forming unit 17 can start the formation of electrolyzed water before the movement of the main body 5 by the movement unit 11 so that the voltage of 7.5 volts is applied to the water before electrolysis in the full water volume of the

second container portions

83A and 83B, thereby ensuring the time for obtaining electrolyzed water containing 5ppm hypochlorous acid. The electrolyzed water generating unit 17 may start the generation of the electrolyzed water before the moving unit 11 moves the main body 5 so that the time for obtaining the electrolyzed water can be secured based on the amount of water in the

second tank

83A, 83B measured by the water level gauge 88.

In order to quickly obtain electrolyzed water containing hypochlorous acid of a desired concentration after the start of the movement of the main body 5, the electrolyzed water forming unit 17 increases the voltage applied between the positive electrode and the negative electrode of the counter electrode 61 at least from the start of the movement of the main body 5 by the moving unit 11 until a predetermined time elapses than in the other cases. The voltage value at this time is referred to as a large voltage value. For example, the electrolyzed water generation unit 17 applies a large voltage value, for example, a voltage of 10 volts, to the electrode 61 before the time elapses for obtaining electrolyzed water containing 5ppm hypochlorous acid from the water before electrolysis in the full water volume of the

second container portions

83A, 83B. The electrolyzed water forming unit 17 may apply a voltage having a large voltage value to the electrode 61 before the time for obtaining the electrolyzed water elapses based on the amount of water in the

second container portions

83A and 83B measured by the water level meter 88.

The electrolyzed water forming unit 17 may change the value of the voltage applied between the positive electrode and the negative electrode of the counter electrode 61 based on the remaining amount of water stored in the tank 16, specifically, the

second container portions

83A and 83B.

As shown in fig. 11, when the amount of water stored in the tank 16 is greater than a predetermined first threshold value, for example, 80% of the full water amount, the electrolyzed water generating unit 17 increases the voltage value applied between the positive electrode and the negative electrode of the counter electrode 61 more than the other time at least until a predetermined time elapses after the movement of the main body 5 is started by the movement unit 11 in order to obtain electrolyzed water containing hypochlorous acid of a desired concentration quickly. For example, the electrolyzed water forming unit 17 applies a voltage having a large voltage value to the electrode 61 before the time elapses for obtaining electrolyzed water containing 5ppm of hypochlorous acid from water before electrolysis which is 80 percent of the full water amount in the

second container units

83A and 83B. The electrolyzed water forming unit 17 may apply a voltage having a large voltage value to the electrode 61 before the time for obtaining the electrolyzed water elapses based on the amount of water in the

second container portions

83A and 83B measured by the water level meter 88.

In other words, the electrolyzed water forming unit 17 increases the voltage applied between the positive electrode and the negative electrode of the counter electrode 61 at least until a predetermined time elapses after the movement of the main body 5 is started by the moving unit 11, or when the amount of water stored in the tank 16 is larger than a predetermined first threshold value.

In a region where the amount of water stored in the reservoir 16 is larger than the predetermined first threshold value, the voltage applied to the electrode 61 may be constant as shown in fig. 9, or may be changed according to the amount of water stored in the reservoir 16. In the case where the voltage is changed in accordance with the amount of water stored in the reservoir 16, the voltage applied to the electrode 61 increases as the amount of water stored in the reservoir 16 increases.

When the amount of water stored in the tank 16 is less than a predetermined second threshold value, for example, 20 percent of the full water amount, the electrolyzed water generation unit 17 decreases the voltage applied between the positive electrode and the negative electrode of the counter electrode 61 as compared with the other cases in order to suppress the consumption of the electric power of the secondary battery 6. The voltage value at this time is referred to as a small voltage value. For example, the electrolyzed water forming unit 17 applies a small voltage, for example, a voltage of 5 volts, between the positive electrode and the negative electrode of the electrode 61. The electrolyzed water generator 17 may apply a voltage having a small voltage value between the positive electrode and the negative electrode of the electrode 61 before the time for obtaining the electrolyzed water elapses based on the amount of water in the

second container portions

83A and 83B measured by the water level meter 88.

In a region where the amount of water stored in the reservoir 16 is less than the predetermined second threshold value, the voltage applied to the electrode 61 may be constant as shown in fig. 9, or may be changed according to the amount of water stored in the reservoir 16. In a region where the amount of water stored in the tank 16 is equal to or greater than the predetermined second threshold value and equal to or less than the first threshold value, the voltage applied to the electrode 61 may be constant as shown in fig. 9, or may vary depending on the amount of water stored in the tank 16. When the voltage is changed according to the amount of water stored in the reservoir 16, the voltage applied to the electrode 61 increases as the amount of water stored in the reservoir 16 increases.

When electrolysis of all the water stored in the tank 16 is completed, the electrolyzed water generating unit 17 may not apply a voltage between the positive electrode and the negative electrode of the electrode 61. For example, after the lapse of time until the voltage of 7.5 volts is applied to the water before electrolysis in the full water volume in the

second container parts

83A and 83B to obtain electrolyzed water containing 5ppm hypochlorous acid, the electrolyzed water forming part 17 does not apply a voltage between the positive electrode and the negative electrode of the electrode 61.

When the remaining amount of electric power charged in the secondary battery 6 is less than a predetermined remaining amount, the electrolyzed water generating unit 17 does not apply a voltage between the positive electrode and the negative electrode of the electrode 61. The predetermined margin is set to a predetermined ratio, for example, 20 percent, with respect to the discharge capacity of the secondary battery 6. The predetermined remaining amount may be an estimated value that is obtained by calculating power necessary for returning to the station 8 as a charging stand based on the environment map information of the dust collection area a and that satisfies the calculated remaining amount of power, or a value obtained by considering a safety factor for the estimated value.

The first supply unit 18 supplies the electrolyzed water in the tank 16 to the surface f to be cleaned under the main body 5 or the wiping and cleaning unit 32 to sterilize the area a to be cleaned. The first supply unit 18 controls the second on-off valve 74 and the first on-off valve 72 of the wiping and dust suction unit 32 to control the supply amount of the electrolyzed water supplied from the storage tank 16 (storage tank 16A, storage tank 16B) to the surface f to be cleaned or the wiping and dust suction member 43.

The

second supply units

19 and 19A supply the electrolytic water in the tank 16 to at least one of the upstream air passage 39u and the inside of the dust container 37, and perform sterilization of the dust accumulated in the dust container 37. The second supply unit 19A controls the opening/closing drive unit 97 of the first shutter device 91 to control the supply amount of the electrolytic water supplied from the storage tank 16 (storage tank 16A, storage tank 16B) to at least one of the upstream air passage 39u and the inside of the dust container 37.

The second supply unit 19B supplies the electrolytic water in the tank 16 toward the suction port 34 to sterilize the dust accumulated in the dust container 37. The second supply unit 19B controls the shutter drive unit 107 of the second shutter device 105 to control the supply amount of the electrolytic water supplied from the sump 16 (the sump 16A, the sump 16B) to the suction port 34.

The first supply unit 18 and the

second supply units

19, 19A, and 19B start supply of the electrolytic water after the concentration of hypochlorous acid contained in the electrolytic water reaches, for example, 5 ppm. The concentration of hypochlorous acid contained in the electrolyzed water can be estimated from the relationship between the amount of water that can be stored in the

second container portions

83A and 83B and the voltage applied to the electrode 61 of the electrolyzed water forming portion 17, or a sensor that can measure the concentration of hypochlorous acid may be used. For example, the first supply unit 18 and the

second supply units

19, 19A, and 19B apply a voltage of 7.5 volts to the water before electrolysis in the full water volume of the

second container units

83A and 83B, and start the supply of the electrolyzed water after the lapse of the time required to generate the electrolyzed water containing 5ppm hypochlorous acid. Further, the first supply unit 18 and the

second supply units

19, 19A, and 19B may start the supply of the electrolyzed water after a lapse of time necessary for the generation of the electrolyzed water based on the amount of water in the

second tank portions

83A and 83B measured by the water level meter 88.

As described above, the autonomous electric vacuum cleaner 1 of the present embodiment includes: a first supply unit 18 for supplying the electrolyzed water stored in the tank 16 to the outside of the main body 5; and

second supply units

19, 19A, and 19B for supplying the electrolytic water stored in the tank 16 to at least one of the upstream air passage 39u and the inside of the dust container 37. Therefore, the autonomous electric vacuum cleaner 1 can remove bacteria from various places to which it has moved during the course of cleaning, and can remove bacteria from dust accumulated during the course of cleaning.

The autonomous electric vacuum cleaner 1 of the present embodiment includes at least one of the

second supply units

19 and 19A having the second atomizing device 77 for supplying the electrolyzed water in the form of a mist, and the second supply unit 19B having the third atomizing device 103. Therefore, the autonomous electric vacuum cleaner 1 can easily sterilize the dust accumulated in the dust container 37 by atomizing the electrolytic water containing hypochlorous acid and supplying the atomized electrolytic water to at least one of the upstream air passage 39u and the inside of the dust container 37. Further, the autonomous vacuum cleaner 1 atomizes the electrolytic water to thereby adjust the amount of the electrolytic water supplied to the upstream air passage 39u and the inside of the dust container 37, thereby preventing unnecessary wetting of the dust in the dust container 37, the inner surface of the upstream air passage 39u, and the inner surface of the dust container 37.

The autonomous vacuum cleaner 1 of the present embodiment includes at least one of the

second supply units

19 and 19A having the water retaining member 79 for vaporizing the electrolyzed water and the second supply unit 19B having the water retaining member 79 for vaporizing the electrolyzed water. Therefore, the autonomous vacuum cleaner 1 can vaporize the electrolyzed water containing hypochlorous acid and supply the electrolyzed water to at least one of the upstream air passage 39u and the inside of the dust container 37, and can easily sterilize the dust accumulated in the dust container 37. Further, the autonomous vacuum cleaner 1 vaporizes the electrolyzed water, thereby adjusting the amounts of the electrolyzed water supplied to the upstream air passage 39u and the inside of the dust container 37 to appropriate amounts, and preventing unnecessary wetting of the dust in the dust container 37, the inner surface of the upstream air passage 39u, and the inner surface of the dust container 37.

The autonomous electric vacuum cleaner 1 of the present embodiment includes

second supply units

19A and 19B that limit the period of supplying the electrolyzed water. Therefore, even when the electrolytic water is atomized and supplied to at least one of the upstream air passage 39u and the inside of the dust container 37 or when the electrolytic water is vaporized and supplied to at least one of the upstream air passage 39u and the inside of the dust container 37, the autonomous vacuum cleaner 1 appropriately adjusts the amount of the electrolytic water supplied to the upstream air passage 39u and the inside of the dust container 37, and prevents the dust in the dust container 37, the inner surface of the upstream air passage 39u, and the inner surface of the dust container 37 from being unnecessarily wetted.

The autonomous electric vacuum cleaner 1 of the present embodiment includes the first shutter device 91 or the second shutter device 105 that restricts the period during which the electrolyzed water is supplied. Therefore, the autonomous vacuum cleaner 1 can easily and appropriately control the amount of electrolyzed water supplied to the upstream air passage 39u and the inside of the dust container 37.

The autonomous electric vacuum cleaner 1 of the present embodiment has a water supply port 85 (liquid supply port) through which electrolyzed water can be replenished. Therefore, the autonomous vacuum cleaner 1 can replenish the electrolytic water generated outside, for example, in the station 8 having the electrolytic water generating unit 17 to the tank 16 without providing the electrolytic water generating unit 17 in the autonomous vacuum cleaner itself, and can sterilize various places to which the autonomous vacuum cleaner moves during dust collection and can sterilize dust accumulated during dust collection.

The autonomous electric vacuum cleaner 1 of the present embodiment includes the second supply unit 19B, and the second supply unit 19B supplies the electrolyzed water to the suction airflow passage 39 from the outside of the suction port 34 by the flow of the air sucked by the negative pressure acting on the suction port 34. Therefore, the autonomous vacuum cleaner 1 can extremely easily remove dust in the dust container 37 without providing a water guide path connected to the upstream air passage 39u and the dust container 37 in the main body 5.

Therefore, according to the autonomous electric vacuum cleaner 1 of the present embodiment, it is possible to easily remove bacteria from various places to which the cleaner has moved during the cleaning process, while removing bacteria from accumulated dust during the cleaning process.

Several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Claims

1. An autonomous electric vacuum cleaner is provided with:

a main body having a suction port;

an electric blower for generating negative pressure in a suction air passage connected to the suction port;

a dust collector which is a part of the suction air passage and collects dust sucked by a negative pressure acting on the suction port;

a storage tank disposed in the main body and storing electrolyzed water;

a first supply unit configured to supply the electrolyzed water stored in the tank to the outside of the main body; and

and a second supply unit configured to supply the electrolyzed water stored in the tank to the intake air passage.

2. The autonomous electric vacuum cleaner of claim 1,

the second supply unit has an atomizing device that supplies the electrolyzed water in a mist form.

3. The autonomous electric vacuum cleaner of claim 1 or 2,

the second supply unit has a water retaining body that vaporizes the electrolyzed water.

4. The autonomous electric vacuum cleaner of any one of claims 1 to 3,

the second supply unit limits a period of time during which the electrolyzed water is supplied.

5. The autonomous electric vacuum cleaner of claim 4,

the second supply unit includes a shutter device that restricts a period of time during which the electrolytic water is supplied.

6. The autonomous electric vacuum cleaner of any one of claims 1 to 5,

the storage tank is provided with a liquid supply port capable of replenishing the electrolytic water.

7. The autonomous electric vacuum cleaner of any one of claims 1 to 6,

the autonomous vacuum cleaner includes an electrolyzed water generator that electrolyzes water to generate the electrolyzed water stored in the storage tank.

8. The autonomous electric vacuum cleaner of any one of claims 1 to 7,

the second supply unit supplies the electrolyzed water to the intake air passage from outside the intake port by a flow of air sucked by the negative pressure acting on the intake port.