JP7390624B2 - Vacuum cleaner - Google Patents

Description

The present invention relates to a vacuum cleaner that sucks dust while scraping it.

Various vacuum cleaners that suck dust while scraping it off have been developed (see Patent Document 1). The vacuum cleaner disclosed in Patent Document 1 includes a vacuum cleaner body that generates suction force to suck dust. The vacuum cleaner body includes a tube member forming a dust flow path through which dust flows, and a suction tool is attached to the tip of the tube member.

The suction tool includes a suction housing configured to be attachable to the tip of the pipe member. The suction housing is configured to form a suction space that is wider than the above-mentioned dust flow path. A scraping roller extending in the width direction is arranged in the suction space. The scraping roller is rotatably held by the suction housing, and is driven by a motor built into the suction housing to scrape off dust while rolling on the floor surface.

The scraping roller disclosed in Patent Document 1 is formed in such a shape that its diameter decreases toward the center position in the longitudinal direction of the scraping roller. Therefore, even if long pieces of dust (for example, hair) are spirally wound around the scraping roller, some parts of the long pieces of dust do not overlap with other parts, so that the long pieces of dust can easily unravel from the scraping roller. Thereby, the vacuum cleaner of Patent Document 1 prevents long dust particles from remaining wrapped around the scraping roller, and suppresses a decrease in the scraping ability of the scraping roller.

Japanese Patent Application Publication No. 2011-188951

The technique disclosed in Patent Document 1 makes it easier to remove long dust particles from the scraping roller by devising the shape of the scraping roller. However, there are various shapes of dust that can adhere to the scraping roller, and it is not possible to remove various shapes of dust from the scraping roller only by changing the shape of the scraping roller.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum cleaner that is capable of removing dust without relying on the shape of a scraping roller.

A vacuum cleaner according to one aspect of the present invention includes a vacuum cleaner body that generates a suction force for sucking dust, a scraping roller that is attached to the vacuum cleaner body , and a scraping roller that extends horizontally with respect to the scraping roller. another scraping roller arranged in line with the other scraping roller, a suction tool that scrapes off dust, and the suction tool that performs a removing operation that promotes the removal of dust attached to the scraping roller and the other scraping roller. and a control unit for causing the execution to occur. The scraping roller and the other scraping roller are each provided with a brush portion on the outer periphery thereof, which is rubbed against the floor surface and elastically deformed when the scraping roller and the other scraping roller rotate. . The suction tool includes a motor that generates a driving force that drives the scraping roller, and another motor that generates a driving force that rotates the other scraping roller. The control unit controls the motor so that the scraping roller rotates at a peripheral speed higher than the peripheral speed of the scraping roller during a predetermined base operation, and controls the peripheral speed of the other scraping roller. The other motor is controlled so that the peripheral speed of the scraping roller is lower than the circumferential speed of the scraping roller, thereby causing the suction tool to perform the removing operation.

According to the above configuration, the control unit causes the suction tool to perform the removal operation . When the suction tool performs a removal operation, the movement of the suction tool rather than the shape of the scraping roller promotes the removal of dust, so the dust can be scraped off without relying on the shape of the scraping roller. Can be removed from the roller .

In the removing operation , if the circumferential speed of the scraping roller increases while the suction tool is placed on the floor, the frequency of elastic deformation of the brush portion also increases. As a result, the frequency with which dust around the brush part receives the restoring force of the brush part increases, and the removal of dust attached around the brush part is facilitated. In particular, when the scraping roller and other scraping rollers are arranged side by side, dust may adhere across these scraping rollers. In order to remove such dust, the peripheral speed of the scraping roller is increased from the peripheral speed during the base operation while maintaining the peripheral speed of the other scraping rollers at the peripheral speed during the base operation. As a result, a difference in circumferential speed occurs between the scraping rollers arranged on the left and right sides. This circumferential speed difference makes it possible to apply a twisting force to the dust attached across the scraping roller and other scraping rollers. This torsional force facilitates the removal of dust from the scraping roller.

Regarding the above configuration, the control unit rotates the scraping roller for a predetermined period in a state where the peripheral speed of the scraping roller is higher than the peripheral speed during the base operation, and then rotates the scraping roller. The motor may be controlled to return the circumferential speed of the motor to the circumferential speed during the base operation.

According to the above-described configuration, when the circumferential speed of the scraping roller increases, the number of times the brush portion rubs against the floor surface increases, which may increase noise. In order to prevent large noises from occurring over a long period of time, the control section controls the motor so that the circumferential speed of the scraping roller continues to be high for a predetermined period and then returns to the circumferential speed of the base operation. is under control.

Regarding the above-mentioned configuration, the suction tool may include a suction housing that forms a suction space that receives the suction force of the vacuum cleaner body and sucks dust. The scraping roller and the other scraping roller may be arranged in the suction space. The control unit may control the vacuum cleaner main body to increase the suction force, and cause the vacuum cleaner main body to perform the removing operation.

According to the above configuration, when the suction force of the vacuum cleaner body increases, the suction force acting on the suction space increases. Since the scraping roller and other scraping rollers are arranged in the suction space, the dust attached to the scraping roller and other scraping rollers receives increased suction force and is easily sucked into the vacuum cleaner body. Become.

Regarding the above configuration, the control unit rotates the scraping roller for a predetermined period in a state where the peripheral speed of the scraping roller is higher than the peripheral speed during the base operation, and then adjusts the peripheral speed of the scraping roller. controlling the motor so as to return the circumferential speed to the circumferential speed during the base operation, and controlling the circumferential speed of the other scraping roller to be higher than the circumferential speed during the base operation after the predetermined period. Other motors may also be controlled.

According to the above configuration, after the scraping rollers are rotated with a circumferential speed difference between the scraping rollers and other scraping rollers, the magnitude relationship of the circumferential speeds of these scraping rollers is determined. The motor and other motors are controlled so that the motor is reversed. As a result, the torsional force in the opposite direction acts on the dust attached across the scraping roller and the other scraping rollers, thereby promoting the removal of the dust from the scraping roller.

Regarding the above-described configuration, the vacuum cleaner may further include a current detection section that detects the current supplied to the motor and the other motor. On the condition that the current detection unit detects that the current supplied to the motor and the other motor both exceed a first current threshold, the control unit executes the removal operation on the suction tool. It may be configured to allow

According to the above configuration, if dust adheres to the scraping roller and the other scraping rollers, the rotation of the scraping roller and the other scraping rollers is resisted by the dust. In this case, the load on the motor and other motors increases and the current supplied to these motors increases. If the current detection unit detects a current that exceeds the first current threshold value for the motor and other motors, it is assumed that dust is attached to the scraping roller and the other scraping rollers. In this case, the control unit individually controls the motor and other motors to create a circumferential speed difference between the scraping roller and the other scraping rollers, so that the control unit controls the motor and other motors individually to create a circumferential speed difference between the scraping roller and the other scraping rollers. It is possible to apply a twisting force to the dust and promote the removal of the dust.

Regarding the above-mentioned configuration, the vacuum cleaner may further include a separation detection section that detects whether the suction tool is separated from the floor surface. A detection result indicating that the suction tool is not separated from the floor surface is obtained from the separation detection unit, and the current supplied to the motor and the other motor are both above the first current threshold. As a condition, the control unit may be configured to cause the suction tool to perform the removal operation.

According to the above-mentioned configuration, if a circumferential speed difference is created between the scraping roller and another scraping roller while the suction tool is not far from the floor surface, the suction tool will bend to the left or right. try to That is, the circumferential speed difference between the scraping roller and other scraping rollers accompanying the removal operation may cause problems in the steerability of the suction tool. Therefore, it is undesirable to provide an unnecessary difference in peripheral speed between the scraping roller and other scraping rollers. Therefore, it is confirmed that there is a high possibility that dust is attached across the scraping roller and other scraping rollers by comparing the current supplied to the motor and other motors with the first current threshold value. Then, the removal operation is performed.

Regarding the above-mentioned configuration, when a detection result indicating that the suction tool is away from the floor surface is obtained from the separation detection section, the control section controls the magnitude of the current detected by the current detection section to The suction tool may be configured to perform the removing operation when the current exceeds a second current threshold that is smaller than the first current threshold.

According to the above configuration, when the suction tool is not far from the floor surface, the load on the motor and other motors is reduced by the brush part rubbing against the floor surface, compared to when the suction tool is far from the floor surface. only becomes higher. Therefore, if a detection result indicating that the suction device is not far from the floor surface is obtained from the separation detection section, when the magnitude of the current detected by the current detection section exceeds the relatively large first current threshold value, , the control unit causes the suction tool to perform the removal operation. On the other hand, when the suction tool is away from the floor, when the magnitude of the current detected by the current detection section exceeds a relatively small second current threshold, the control section causes the suction tool to perform a removal operation. let

Regarding the above-mentioned configuration, the vacuum cleaner may further include a separation detection section that detects whether the suction tool is separated from the floor surface. The control unit may be configured to cause the suction tool to perform the removal operation on the condition that a detection result indicating that the suction tool is separated from the floor surface is obtained from the separation detection section. good.

According to the above-described configuration, when the suction tool is away from the floor surface, there is no problem with the steerability of the suction tool. Therefore, without performing any process to confirm that there is a high possibility of dust adhering to the scraping roller and other scraping rollers, the difference in circumferential speed between the scraping roller and other scraping rollers can be may be provided. That is, a peripheral speed difference may be provided between these scraping rollers each time the suction tool leaves the floor surface. As a result, the frequency of the removal operation increases and the removal of dust from these scraping rollers is facilitated.

Regarding the above-mentioned configuration, the vacuum cleaner may further include a separation detection section that detects whether the suction tool is separated from the floor surface. When a detection result that the suction tool is away from the floor surface is obtained from the separation detection section, a detection result that the suction tool is not separated from the floor surface is obtained from the separation detection section. The control unit may control the motor and the other motor so that a larger circumferential speed difference is obtained between the scraping roller and the other scraping roller than in the case of the scraping roller.

According to the above configuration, in a state where the suction tool is not far from the floor surface, in order to suppress problems in steerability of the suction tool, the control section adjusts the peripheral speed difference between the scraping roller and other scraping rollers. Make it relatively small. On the other hand, when the suction tool is away from the floor surface, the above-mentioned steering problem does not occur. Therefore, in this state, the control section makes the peripheral speed difference between the scraping roller and the other scraping rollers relatively large, and causes the dust attached to the scraping roller and the other scraping rollers to undergo a large twisting motion. exert force.

Regarding the above-mentioned configuration, the scraping roller and the other scraping roller are arranged such that the tip of the scraping roller and the tip of the other scraping roller face each other with an interval, and the tip It may have a tapered shape that becomes thinner toward. The vacuum cleaner may further include an optical detection unit that optically detects dust trapped in a space between the tip of the scraping roller and the tip of the other scraping roller.

According to the above configuration, the scraping roller and the other scraping rollers have a tapered shape that becomes thinner toward the tip, so that the dust attached to the scraping roller and the other scraping roller is removed from the tip. It is easier to move toward the target. In this case, dust may accumulate at the tips of the scraping roller and other scraping rollers, and may become trapped in the space between the tips of the scraping roller and other scraping rollers.

Dust caught in the space between the tips of the scraping roller and other scraping rollers is detected by the optical detection section. In this case, the control unit individually controls the motor and the other motors to generate a peripheral speed difference between the scraping roller and the other scraping rollers. This circumferential speed difference allows dust to be removed from the space between the tips of the scraping roller and the other scraping roller.

Regarding the above-mentioned configuration, the vacuum cleaner may further include a separation detection section that detects whether the suction tool is separated from the floor surface. On condition that a detection result indicating that the suction device is not separated from the floor surface is obtained from the separation detection section and the optical detection section detects dust, the control section causes the removal operation to be performed on the suction device. It may be configured to be executed by a tool.

According to the above configuration, when the suction tool is not far from the floor surface, the scraping roller and the A removing operation is performed to create a peripheral speed difference between the scraping roller and the scraping roller.
A vacuum cleaner according to another aspect of the present invention is configured to suck dust. The vacuum cleaner includes a vacuum cleaner body that generates a suction force for sucking dust, a scraping roller that is attached to the vacuum cleaner body, and is arranged to be aligned laterally with respect to the scraping roller. another scraping roller, a suction tool for scraping dust, and a removing operation that promotes the removal of dust attached to the scraping roller and the other scraping roller, or to the scraping roller and the other scraping roller. and a control unit that causes the vacuum cleaner main body or the suction tool to perform a notification operation to notify of adhesion of dust. The scraping roller and the other scraping roller are arranged such that the tip of the scraping roller and the tip of the other scraping roller face each other with a gap between them, and become thinner toward the tip. It has a tapered shape. The vacuum cleaner further includes an optical detection section that optically detects dust trapped in a space between the tip of the scraping roller and the tip of the other scraping roller. The control unit is configured to cause the cleaner body or the suction tool to perform the removal operation or the notification operation when the optical detection unit detects dust trapped in the space.

The above-mentioned vacuum cleaner can remove dust without relying on the shape of the scraping roller.

It is a schematic side view of the vacuum cleaner of a 1st embodiment. FIG. 2 is a schematic exploded perspective view of a suction tool configured to be attachable to a vacuum cleaner. It is a schematic plan view of the scraping roller of a suction tool. It is a schematic plan view of the inside of a suction tool. It is a block diagram showing the rough functional composition of the control part which controls a suction tool. It is a schematic flowchart of the control operation of a suction tool. It is a schematic flowchart of the control operation of a suction tool. FIG. 3 is a schematic diagram of the force acting on a long piece of dust wrapped around a scraping roller of a suction tool. It is a schematic flowchart of the control operation of a suction tool. It is a schematic longitudinal cross-sectional view of the suction tool of the vacuum cleaner of 2nd Embodiment. It is a block diagram showing the rough functional composition of the control part which controls a suction tool. It is a schematic flowchart of the control operation of a suction tool. It is a schematic flowchart of the control operation of a suction tool. It is a schematic expanded perspective view of the suction tool of the vacuum cleaner of 3rd Embodiment. FIG. 3 is a schematic block diagram of an adhesion determining section that optically detects whether dust is adhering to the scraping roller. It is a schematic side view of the vacuum cleaner of 4th embodiment. It is a schematic side view of the suction tool of the vacuum cleaner of 5th Embodiment. It is a schematic block diagram of a suction tool.

<First embodiment>
FIG. 1 is a schematic side view of a vacuum cleaner 101 according to the first embodiment. FIG. 2 is a schematic exploded perspective view of the suction tool 100 that constitutes the tip portion of the vacuum cleaner 101. As shown in FIG. The vacuum cleaner 101 will be described with reference to FIGS. 1 and 2.

The vacuum cleaner 101 includes a vacuum cleaner body 102 that generates suction force, a suction tool 100 that forms a suction space 110 (see FIG. 2) into which dust is sucked, and is configured to be attachable to the vacuum cleaner body 102. It is equipped with

The vacuum cleaner main body 102 includes a suction source 103 that generates suction force for sucking dust, and a pipe member 109 extending from the suction source 103. The tube member 109 includes a hose 104 that extends forward from the suction source 103 and constitutes the base end side of the tube member 109, a distal tube 107 that constitutes the distal end side of the tube member 109, and a hose 104. A connecting tube 202 connecting the tip tube 107 is included.

The connecting tube 202 is provided with a holding portion 105 that is held by a user. The holding portion 105 is a portion that extends from the outer peripheral surface of the connecting tube 202 and has a shape suitable for being held by a user. The holding part 105 is provided with an operation part 108 (for example, a button for starting and stopping the cleaner body 102 and the suction tool 100) that is operated by the user.

The tip tube 107 is a tubular member having higher rigidity than the hose 104, and forms a dust suction path together with the hose 104 and the connecting tube 202. The tip of the tip tube 107 is connected to the suction tool 100.

As shown in FIG. 2, the suction tool 100 includes a suction housing 120 and a pair of scraping rollers 131 and 132 rotatably held by the suction housing 120.

The suction housing 120 has a shape that is wider in the width direction than in the front-rear direction in order to obtain a suction space 110 that is wider in the left-right direction than the dust suction path formed by the tip pipe 107, the connecting pipe 202, and the hose 104. . The suction housing 120 includes a housing body 121 having a substantially C-shape that opens forward in a plan view, and a cover member 122 configured to be attached to the housing body 121.

The housing body 121 has side portions 123 and 124 provided at positions spaced apart from each other in the left-right direction, and is located on the rear side of the side portions 123 and 124 (that is, on the cleaner body 102 side). 124. The side parts 123, 124 and the rear part 125 have a hollow structure as a whole. A drive mechanism 150 (see FIG. 4) for driving the scraping rollers 131, 132 is accommodated in the side parts 123, 124 and rear part 125. The drive mechanism 150 will be described in detail separately.

The rear part 125 and the side parts 123 and 124 form a suction space 110 for sucking in dust on the floor. That is, the suction space 110 is defined by the front end of the rear part 125, the right end of the left side part 123, and the left end of the right side part 124. Scraping rollers 131 and 132 are arranged side by side in this suction space 110, and the side parts 123 and 124 support these scraping rollers 131 and 132, respectively. Specifically, bearings (not shown) that hold the scraping rollers 131 and 132 are provided on the inner walls of the side portions 123 and 124 (that is, the walls facing the suction space 110).

The rear portion 125 is configured to be connectable to the tip of the tip tube 107. A flow path (not shown) is formed in the rear portion 125 that connects the flow path formed by the tip tube 107, the connecting tube 202, and the hose 104 to the suction space 110.

The cover member 122 is configured to close the suction space 110 from above. The left and right end portions of the cover member 122 are configured to be fixed to the side portions 123, 124 while being placed on the side portions 123, 124.

The scraping rollers 131 and 132 are rotatably held side by side in the suction space 110. The scraping rollers 131 and 132 are driven by a drive mechanism 150 and are configured to scrape off dust on the floor while rolling on the floor. The left scraping roller 131 is cantilever-supported by the left side portion 123 and extends rightward from the side portion 123 within the suction space 110 . The right scraping roller 132 is cantilever-supported by the right side portion 124 and extends leftward from the side portion 124 within the suction space 110 . The tips of the scraping rollers 131 and 132 are separated from each other in the width direction of the suction tool 100.

Since the scraping roller 132 on the right side has a structure that is bilaterally symmetrical to the scraping roller 131, only the structure of the scraping roller 131 on the left side will be described below.

The scraping roller 131 has a tapered shape that becomes thinner toward the tip. As shown in FIG. 3, the scraping roller 131 includes a connecting shaft 250, a roller portion 311 connected to the connecting shaft 250 so as to rotate approximately coaxially with the connecting shaft 250, and a spiral shape on the outer peripheral surface of the roller portion 311. It includes a plurality of brush parts 312 extending to. The outer peripheral surface of the roller part 311 and the plurality of brush parts 312 constitute the outer peripheral part of the scraping roller 131.

The connection shaft 250 is provided to transmit the driving force of the drive mechanism 150 (see FIG. 4) housed within the housing body 121 to the roller portion 311. The connecting shaft 250 is fitted into a bearing provided on the inner wall of the side portion 123 , and the base end portion of the connecting shaft 250 is disposed within the side portion 123 of the housing body 121 . A pulley 251 (see FIG. 4) is attached to the base end of the connection shaft 250 to receive the driving force of the drive mechanism 150.

The distal end of the connection shaft 250 is inserted into and connected to the roller section 311 in order to transmit the driving force of the drive mechanism 150 to the roller section 311.

The roller portion 311 has an outer circumferential surface that becomes thinner toward the tip. That is, the roller portion 311 has a truncated conical outer shape.

The plurality of brush parts 312 extend spirally on the outer circumferential surface of the roller part 311 over a section from the base end to the tip end of the roller part 311, and are arranged at intervals in the circumferential direction of the roller part 311. has been done. The spiral direction of the brush portion 312 is set so that when the scraping roller 131 rotates in the direction of the arrow shown in FIG. .

The brush portion 312 is made of an elastically deformable material. For example, the brush portion 312 may be configured by arranging a large number of elastically deformable bristles in a spiral section on the outer peripheral surface of the roller portion 311.

The drive mechanism 150 includes a pair of motors 151 and 152, a pair of drive belts 153 and 154, and a control circuit 160, as shown in FIG. The left motor 151 and the left drive belt 153 are provided to drive the left scraping roller 131. A right motor 152 and a right drive belt 154 are provided to drive the right scraping roller 132. Control circuit 160 is provided to control motors 151 and 152.

Since the motor 152 and the drive belt 154 have a bilaterally symmetrical structure with the motor 151 and the drive belt 153, only the motor 151 and the drive belt 153 will be described below.

The motor 151 is configured to generate a driving force to rotate the scraping roller 131, and is disposed on the left side of the internal space of the rear portion 125 of the housing body 121. The motor 151 includes a motor body 155 and a motor shaft 156 that projects leftward from the motor body 155.

The motor main body 155 is configured so that the larger the load on the rotation of the motor shaft 156, the lower the impedance and the larger the current flows.

A pulley 252 is attached to the motor shaft 156. A drive belt 153 is wound around a pulley 252 attached to the motor shaft 156 and a pulley 251 attached to a connecting shaft 250 of the scraping roller 131.

Motors 151 and 152 receive power supply through control circuit 160. The control circuit 160 is configured to detect the magnitude of the current supplied to the motors 151, 152, and to control the motors 151, 152 based on the detected magnitude of the current. As shown in FIG. 5, the control circuit 160 includes a current detection section 163 and a control section 164.

The current detection unit 163 includes an ammeter 161 that detects the magnitude of the current supplied to the motor 151 and an ammeter 162 that detects the magnitude of the current supplied to the motor 152. The current supplied to the motors 151, 152 increases as the load applied to the motors 151, 152 increases. As the amount of dust adhering to the scraping rollers 131, 132 increases, the load applied to the motors 151, 152 increases. growing.

The control unit 164 is configured to control the motors 151 and 152 based on the magnitude of the current detected by the ammeters 161 and 162. The control unit 164 may be configured by a processor (for example, a CPU) or another control element that implements a control function for the motors 151 and 152. Control by the control unit 164 will be described in detail separately.

The operation of the vacuum cleaner 101 will be explained below.

When the operation part 108 provided on the holding part 105 is operated, the cleaner body 102 and the suction tool 100 are operated, and the suction force is applied to the suction space 110 of the suction tool 100 through the hose 104, the connecting pipe 202, and the tip pipe 107. act. As a result, the dust on the floor is collected into the suction source 103 through the suction space 110, the tip tube 107, the connecting tube 202, and the hose 104.

During this time, the motors 151 and 152 built into the suction tool 100 operate, and the driving force of the motors 151 and 152 is transmitted to the scraping rollers 131 and 132 by the drive belts 153 and 154. As a result, the scraping rollers 131 and 132 rotate while contacting the floor surface and scrape off the dust on the floor surface.

When the scraping rollers 131, 132 are scraping off dust on the floor surface, dust may adhere to the scraping rollers 131, 132. In order to encourage the removal of dust attached to the scraping rollers 131, 132, the control unit 164 changes the peripheral speed of the scraping rollers 131, 132 as follows. A schematic flowchart of control by the control unit 164 is shown in FIG. Here, control by the control unit 164 will be explained with reference to FIGS. 5 and 6.

When the suction tool 100 is activated by operating the operation unit 108, current is supplied to the motors 151 and 152. At this time, the control unit 164 gives an instruction to the motors 151, 152 to execute the base operation (that is, the operation when no dust is attached to the scraping rollers 131, 132) (step S110). Based on this instruction, the motors 151 and 152 rotate the motor shaft 156 at a rotation speed for base operation (hereinafter referred to as "first rotation speed"). The rotation of the motor shafts 156 of the motors 151, 152 causes the scraping rollers 131, 132 to rotate at a peripheral speed for base operation (hereinafter referred to as "first peripheral speed"). The first rotational speed of the motors 151 and 152 is set so that the following conditions are satisfied.
- The dust on the floor surface is sufficiently scraped off by the scraping rollers 131 and 132.
- Noise from the scraping rollers 131, 132 and motors 151, 152 can be suppressed to a low level.

While the motors 151, 152 are rotating at the first rotation speed, the ammeters 161, 162 monitor the magnitude of the current being supplied to the motors 151, 152. Information regarding the magnitude of the current detected by the ammeters 161 and 162 is transmitted to the control unit 164. The control unit 164 determines whether the magnitude of the current detected by the ammeters 161, 162 exceeds the first current threshold (step S120). If both of the ammeters 161 and 162 detect a current having a magnitude equal to or less than the first current threshold (step S120: No), the scraping ability of the scraping rollers 131 and 132 is reduced to the extent that It is considered that dust is not attached to the scraping rollers 131 and 132. In this case, the control unit 164 causes the motors 151 and 152 to continue the base driving operation (step S120: No).

The base operation continues unless at least one of the ammeters 161, 162 detects a current exceeding the first current threshold (step S120: No). On the other hand, if at least one of the ammeters 161, 162 detects a current exceeding the first current threshold (step S120: Yes), at least one of the scraping rollers 131, 132 has a scraping ability. There is a possibility that a large amount of dust has adhered to the surface, causing the temperature to drop. In this case, the control unit 164 gives an instruction to the motors 151, 152 to perform a removal operation to encourage the removal of dust attached to the scraping rollers 131, 132 (step S130). Specifically, the control unit 164 instructs the motors 151 and 152 to increase the rotation speed of the motor shaft 156 from the first rotation speed to a second rotation speed higher than the first rotation speed (step S130 ). Based on this instruction, motors 151 and 152 rotate motor shaft 156 at the second rotation speed. As a result, the scraping rollers 131 and 132 rotate at a peripheral speed higher than the first peripheral speed (hereinafter referred to as "second peripheral speed").

When the suction tool 100 is placed on the floor, while the scraping rollers 131 and 132 are rotating at the second circumferential speed, the brush portion 312 rotates at the first circumferential speed. I rub against the floor more often than when I'm doing it. The brush portion 312 undergoes elastic deformation (elastic bending deformation) when it rubs against the floor surface, so if the brush portion 312 rubs against the floor surface frequently, the dust attached to the scraping rollers 131 and 132 will be removed from the brush portion. 312's resilience is frequently applied. As a result, the removal of dust attached to the scraping rollers 131 and 132 is facilitated.

The removal operation in which the scraping rollers 131 and 132 rotate at the second circumferential speed is continued until both of the ammeters 161 and 162 detect a current having a magnitude less than the first current threshold value.

As described above, the dust attached to the scraping rollers 131 and 132 is removed by increasing the frequency of elastic deformation and restoring force of the brush portion 312. The restoring force associated with elastic deformation acts not only on long dust particles but also on dust particles of other shapes, so the removal effect due to the increased frequency of occurrence of elastic deformation and restoring force extends to dust particles of various shapes. That is, the above-described technique is effective in removing dust of various shapes.

In the embodiment described above, the suction tool 100 has two scraping rollers 131 and 132 that are cantilevered by the suction housing 120. Alternatively, the suction tool 100 may have one scraping roller supported on both sides by the suction housing 120 (for example, the structure of the suction tool in Patent Document 1). The above-described dust removal control can also be applied to the suction tool 100 having such a structure.

In the embodiment described above, the scraping rollers 131, 132 operate at a relatively high second circumferential speed until the dust attached to the scraping rollers 131, 132 is removed and the current becomes equal to or less than the first current threshold. Keep rotating. In this case, large noise caused by the brush portion 312 rubbing against the floor surface may continue for a long period of time. To improve the noise problem, the following controls may be performed.

In the control shown in FIG. 7, when the base operation continues for a predetermined period (step S111), a determination process is performed on the current supplied to the motors 151 and 152 (step S120). If the current supplied to at least one of the motors 151, 152 exceeds the first current threshold (step S120: Yes), the control unit 164 changes the rotation speed of the motors 151, 152 from the first rotation speed for a predetermined period. The rotation speed is increased to the second rotation speed (step S131: removal operation). When this removal operation continues for a predetermined period, the operation is returned to the base operation (step S111). That is, the circumferential speeds of the scraping rollers 131 and 132 are returned to the original first circumferential speed.

In the control shown in FIG. 7, if the determination result that the current supplied to at least one of the motors 151 and 152 exceeds the first current threshold is repeatedly obtained (step S120: Yes), the removal operation is performed. Runs intermittently. Specifically, a base operation operation for a predetermined period is performed between two removal operations that are intermittently performed. During the period in which the removal operation is being performed, the scraping rollers 131 and 132 are rotating at a relatively high second circumferential speed, so the noise becomes large. On the other hand, during the period in which the base operation is being performed, the scraping rollers 131 and 132 are rotating at a relatively low first circumferential speed, so the noise is reduced. Therefore, by setting the duration of the base operation operation to a certain extent long while setting the duration of the removal operation to be relatively short, it becomes difficult for the user to notice an increase in noise during the period of the removal operation. Alternatively, the user is less likely to feel uncomfortable by the noise during the removal operation.

In the embodiment described above, the spiral direction of the brush portion 312 of the scraping rollers 131, 132 is such that when the scraping rollers 131, 132 rotate in the direction shown by the arrow in FIG. is set to move toward the tip of the In addition, since the scraping rollers 131, 132 become thinner toward the tips, as shown in FIG. 8, the tips of the scraping rollers 131, 132 A force (component of the winding force of the dust) acts on the dust. Therefore, dust may collect at the tips of the scraping rollers 131, 132 and may become attached across the scraping rollers 131, 132. In this case, in order to remove dust attached across the scraping rollers 131, 132, the rotation speeds of the scraping rollers 131, 132 may be different. Control in this case will be described below with reference to FIG.

In the control shown in FIG. 9, after the base operation continues for a predetermined period (step S111), the control unit 164 compares the magnitude of the current supplied to the motors 151, 152 with a first current threshold (step S121). , S122).

When the suction device 100 is placed on the floor, if both of the currents supplied to the motors 151, 152 are equal to or less than the first current threshold (step S121: Yes), the control unit 164 controls the motors 151, 152. 152 to continue the base operation (step S111).

On the other hand, when the suction tool 100 is placed on the floor, if the currents supplied to the motors 151 and 152 both exceed the first current threshold (step S121: No, step S122: Yes), the dust is removed. It is assumed that it is attached across the rollers 131 and 132. In this case, the control unit 164 individually controls the motors 151 and 152 to increase the circumferential speed difference between the scraping rollers 131 and 132 (in addition, during the base operation, the The circumferential speed difference is approximately zero). Specifically, the control unit 164 instructs one of the motors 151 and 152 to increase the rotation speed of the motor shaft 156 from the first rotation speed to the second rotation speed for a predetermined period (step S132). . On the other hand, the control unit 164 does not instruct the other motor to increase the rotational speed of the motor shaft 156 (step S132).

As a result, the rotation speed of one motor becomes the second rotation speed for a predetermined period, and the rotation speed of the other motor is maintained at the first rotation speed. Thereafter, the control unit 164 performs control to return the rotation speed of one motor from the second rotation speed to the first rotation speed, while increasing the rotation speed of the other motor from the first rotation speed to the second rotation speed ( Step S133).

After the operation of the suction tool 100 in this state continues for a predetermined period of time, the control unit 164 maintains the rotation speed of one motor at the first rotation speed and increases the rotation speed of the other motor to a second rotation speed. Then, control is executed to return the rotation speed to the first rotation speed. As a result, the operation of the suction tool 100 returns to the base operation operation (step S111).

If a current exceeding the first current threshold is detected for only one of the motors 151, 152 (steps S121, S122: No), control similar to the control shown in FIG. 7 is performed (step S134). ). That is, the control unit 164 issues an instruction to both motors 151 and 152 to increase the rotation speed of the motor shaft 156 from the first rotation speed to the second rotation speed. Based on this instruction, motors 151 and 152 increase the rotation speed of motor shaft 156 to the second rotation speed for a predetermined period. As a result, the frequency of occurrence of elastic deformation and restoring force of the brush portion 312 increases for both of the scraping rollers 131 and 132, and the removal of dust attached to these scraping rollers 131 and 132 is facilitated.

In the above-described control, since a difference is provided between the rotational speeds of the motors 151 and 152 in step S132, a peripheral speed difference occurs between the scraping rollers 131 and 132. Due to this circumferential speed difference, a twisting force acts on the dust attached across the scraping rollers 131 and 132. This twisting force facilitates the removal of dust adhering across the scraping rollers 131 and 132.

In step S133, which is executed subsequent to step S132, the magnitude relationship between the rotational speeds of the motors 151 and 152 is opposite to the magnitude relationship between the rotational speeds in step S132. That is, after the frequency of occurrence of elastic deformation and restoring force in the brush portion 312 of the scraping roller corresponding to one motor increases (step S132), the elastic deformation of the brush portion 312 of the scraping roller corresponding to the other motor increases (step S132). and the frequency of occurrence of restoring force increases (step S133). As a result, even if the dust does not straddle the scraping rollers 131 and 132 and is attached to the scraping rollers 131 and 132 individually and the current is high, the dust attached to the scraping rollers 131 and 132 individually can encourage the removal of Further, even if the dust attached across the scraping rollers 131 and 132 cannot be completely removed in step S132, the dust can be removed in step S133.

<Second embodiment>
The load applied to the motors 151, 152 is affected not only by the dust attached to the scraping rollers 131, 132, but also by the state of contact between the scraping rollers 131, 132 and the floor surface. Therefore, the magnitude of the current flowing through the motors 151, 152 is also influenced by the contact state between the scraping rollers 131, 132 and the floor surface. That is, the contact state between the scraping rollers 131 and 132 and the floor surface affects the accuracy of determining whether or not dust is attached to the scraping rollers 131 and 132. In the second embodiment, a technology that makes it possible to determine whether dust is attached to the scraping rollers 131, 132 without being affected by the contact state between the scraping rollers 131, 132 and the floor surface. I will explain about it.

In order to detect whether or not the scraping rollers 131, 132 and, by extension, the suction tool 100 are placed on the floor, the suction tool 100 is provided with a separation detection section 140, as shown in FIG. It is being Specifically, a recess 141 is formed on the lower surface of the rear part 125 of the suction housing 120, and the separation detection section 140 is configured in the recess 141.

The separation detection section 140 includes a swing arm 142, a roller 143, and a posture sensor 144. The swing arm 142 is supported within the recess 141 by the rear portion 125 so as to swing up and down. The roller 143 is rotatably attached to the swing arm 142 and rolls on the floor while the suction tool 100 is moving on the floor, thereby assisting the movement of the suction tool 100. Attitude sensor 144 is disposed within rear part 125 and detects the attitude of swing arm 142.

When the suction tool 100 is away from the floor surface, the swing arm 142 assumes the attitude shown in FIG. 10, and the swing arm 142 projects downward from the recess 141. That is, the roller 143 protrudes below the lower surface of the suction housing 120. On the other hand, when the suction tool 100 is placed on the floor, the swing arm 142 takes a substantially horizontal position, and the roller 143 is housed in the recess 141. The posture sensor 144 is configured to be able to detect such a change in posture of the swing arm 142. When the swing arm 142 takes the attitude shown in FIG. 10, the attitude sensor 144 outputs a detection result that the suction tool 100 is away from the floor surface. On the other hand, when the swing arm 142 is in a substantially horizontal posture, the posture sensor 144 outputs a detection result indicating that the suction tool 100 is not separated from the floor surface.

Posture sensor 144 is electrically connected to control unit 164, as shown in FIG. The control unit 164 performs determination processing based on the detection result of the attitude sensor 144 (that is, the attitude of the swing arm 142). Control based on the attitude of the swing arm 142 will be described below with reference to FIG. 12.

When the attitude sensor 144 detects that the swinging arm 142 is in a horizontal attitude while the suction tool 100 is operating (step S210: No), the detection result output from the attitude sensor 144 represents that the suction tool 100 is not far from the floor surface. When this detection result is obtained, the control (steps S111 to S134) shown in FIG. 9 is executed (determination processing using the first current threshold, etc.). Conversely, if the attitude sensor 144 detects that the swing arm 142 is in the attitude shown in FIG. 10 (step S210: Yes), the detection result output from the attitude sensor 144 indicates that Indicates being away from the floor. When this detection result is obtained, the control unit 164 performs a determination process regarding the magnitude of the current supplied to the motors 151 and 152 using a second current threshold smaller than the first current threshold (step S221). , S222).

When the suction tool 100 is away from the floor, no load is applied to the motors 151, 152 due to the contact between the floor and the scraping rollers 131, 132, so the second current threshold value is , 132 without considering the load caused by contact with the terminals. The second current threshold value is determined by the amount of dust attached to the scraping rollers 131, 132 that reduces the scraping ability of the scraping rollers 131, 132 when the scraping rollers 131, 132 are not in contact with the floor surface. The size is set so that it can be detected.

When the suction tool 100 is away from the floor, if both of the current values of the motors 151 and 152 are equal to or less than the second current threshold (step S221: Yes), the amount of current that reduces the scraping ability is There is a high possibility that dust is not attached to the scraping rollers 131 and 132. In this case, the control unit 164 instructs the motors 151 and 152 to perform the same operation as the base operation. On the other hand, if both of the currents flowing through the motors 151 and 152 exceed the second current threshold (step S221: No, step S222: Yes), the amount of current flowing through the motors 151, 152 is such that it reduces the scraping ability. It is assumed that dust is attached to the scraping rollers 131 and 132. In this case, the control unit 164 executes control to create a difference in rotation speed between the motors 151 and 152 (steps S132 and S133), and creates a difference in circumferential speed between the scraping rollers 131 and 132.

Through the control in steps S132 and S133, when the suction tool 100 is away from the floor surface, a twisting force can be applied to the dust attached across the scraping rollers 131 and 132, and the removal of the dust is facilitated. (removal action).

Note that when the suction tool 100 is off the floor, dust cannot be removed by the elastic deformation and restoring force of the brush portion 312, so the control to increase the rotation speed of both motors 151 and 152 (step S134) is performed. control) is not performed.

In the control shown in FIG. 12, the process of determining whether dust is attached to the scraping rollers 131, 132 even when the suction tool 100 is off the floor (that is, if the detected current value exceeds the second current threshold) (determination process of whether or not there is one) is performed. When the suction tool 100 is away from the floor, the influence of the contact between the scraping rollers 131 and 132 and the floor can be ignored, so the accuracy is better than when the suction tool 100 is placed on the floor. Judgment results can be obtained.

When the suction tool 100 is away from the floor, a larger peripheral speed difference may be provided between the scraping rollers 131 and 132 than when the suction tool 100 is placed on the floor. That is, in the control shown in FIG. 12, in step S131, which is executed while the suction tool 100 is away from the floor, the rotation speed of one motor is set to the third rotation speed higher than the second rotation speed. Good too. Furthermore, in step S132, which is executed while the suction tool 100 is away from the floor surface, the rotation speed of the other motor may be set to the third rotation speed.

When the suction tool 100 is away from the floor surface, no noise is generated due to the contact between the scraping rollers 131 and 132 and the floor surface. You can raise it higher than when you are there. That is, even if the rotational speed of the motors 151 and 152 is set to the third rotational speed higher than the second rotational speed, the noise problem is unlikely to occur.

When the suction tool 100 is away from the floor, by setting the rotation speed of one of the motors 151 and 152 to the first rotation speed and setting the rotation speed of the other to the third rotation speed, the scraping roller A relatively large peripheral speed difference can be provided between 131 and 132. By providing a large circumferential speed difference between the scraping rollers 131 and 132, a larger torsional force can be applied to the dust attached across the scraping rollers 131 and 132. As a result, removal of the dust is facilitated.

In the control shown in FIG. 12, the rotation speed of the motors 151, 152 is increased based on the result of the determination process (steps S221, S222) using the second current threshold, but as shown in FIG. The determination process using .

In the control shown in FIG. 13, if the separation detection unit 140 detects that the suction tool 100 is away from the floor (step S210: Yes), the rotation speed of the motors 151 and 152 is alternately increased (step S132, S133) is executed. That is, when the suction tool 100 is away from the floor surface, a removing operation is performed that creates a difference in circumferential speed between the scraping rollers 131 and 132.

In the control shown in FIG. 13, when either the following first removal condition or second removal condition is satisfied, the operation of the suction tool 100 is switched from the base operation operation to the removal operation.
(First removal condition):
- The suction tool 100 is not far from the floor (step S210: No (FIG. 13)), and
- The detected current value of the motors 151 and 152 exceeds the first current threshold (step S122: Yes (FIG. 9)).
(Second removal condition):
- The suction tool 100 is away from the floor (step S210: Yes (FIG. 13)).

Unlike the second removal condition, under the first removal condition, a process for determining whether the detected current value obtained by the current detection unit 163 exceeds the first current threshold value is performed for the following reason. There is. When the suction tool 100 is placed on the floor, if a circumferential speed difference is created between the scraping rollers 131 and 132, the suction tool 100 tends to move while turning leftward or rightward. In order to prevent such steering problems from occurring unnecessarily, the detected current value is compared with a first current threshold value, and it is determined that there is a high possibility that dust has adhered to the scraping rollers 131 and 132. A determination is made as to whether or not this is the case. Then, the control unit 164 causes the removal operation to be performed only in a state where there is a high possibility that dust is attached to the scraping rollers 131 and 132.

On the other hand, if the suction tool 100 is away from the floor surface, the above-mentioned steering problem does not occur. Therefore, when the suction tool 100 is away from the floor surface, there is no problem even if a peripheral speed difference is provided between the scraping rollers 131 and 132 without comparing the detected current value and the first current threshold value. By providing a circumferential speed difference between the scraping rollers 131 and 132 each time the suction tool 100 leaves the floor surface, the frequency at which a circumferential speed difference is provided between the scraping rollers 131 and 132 increases. As a result, the removal of dust from these scraping rollers 131, 132 is facilitated.

The magnitude of the circumferential speed difference between the scraping rollers 131 and 132 when the suction tool 100 is placed on the floor and the length of the period during which the circumferential speed difference occurs between the scraping rollers 131 and 132 are as follows. , is preferably set in consideration of the above-mentioned steerability problem.

In the control shown in FIG. 13, even if the rotation speed of one motor is set to the third rotation speed higher than the second rotation speed in step S131, which is executed while the suction tool 100 is away from the floor surface. good. Furthermore, in step S132, which is executed while the suction tool 100 is away from the floor surface, the rotation speed of the other motor may be set to the third rotation speed.

<Third embodiment>
In the embodiment described above, the process for determining whether dust is attached to the scraping rollers 131, 132 is based on the magnitude of the current supplied to the motors 151, 152. Alternatively, dust attached to the scraping rollers 131 and 132 may be detected optically.

For optical detection of dust, as shown in FIG. 14, the suction tool 100 is provided with an optical detection section 168. The optical detection unit 168 includes a plurality of optical sensors 166 on the roller portions 311 of the scraping rollers 131 and 132, and one optical sensor 167 on the inner surface of the housing body 121 of the suction housing 120. A plurality of optical sensors 166 are arranged to detect dust attached to the outer periphery of the scraping rollers 131 and 132. Specifically, three optical sensors 166 are arranged on the outer circumferential surface of the roller section 311 between a pair of brush sections 312 adjacent to each other at intervals in the circumferential direction. These three optical sensors 166 are arranged at the proximal end side, the distal end side, and the center position in the axial direction of the scraping rollers 131 and 132.

The optical sensor 167 is arranged on the inner surface of the housing body 121 at a position vertically facing the space between the tips of the scraping rollers 131 and 132, and is used to detect dust caught in the space.

Optical sensors 166 and 167 are of a reflective type. That is, the optical sensors 166 and 167 are configured to emit light and receive reflected light generated by the light being reflected by dust.

Optical sensors 166 and 167 are electrically connected to control section 164, as shown in FIG.

The control unit 164 is configured to detect whether dust is attached to the scraping rollers 131 and 132 based on the amount of light received by each of the plurality of optical sensors 166 and the light reception pattern of these optical sensors 166. There is. Furthermore, the control unit 164 determines whether or not dust is trapped in the space between the tips of the scraping rollers 131 and 132 based on the amount of light received by the optical sensor 167.

Control of the motors 151 and 152 based on the determination result of the control unit 164 is the same as in the first embodiment and the second embodiment.

When the optical detection section 168 is used, unlike when the current detection section 163 is used, the adhesion of dust to the scraping rollers 131, 132 is influenced by the contact state of the scraping rollers 131, 132 with the floor surface. can be detected without any

In the embodiments described above, optical sensors 166, 167 are reflective. Alternatively, optical sensors 166, 167 may be of a transmissive type. For example, one of a light emitting element that emits light and a light receiving element that receives this light may be provided on the outer circumferential surface of the roller section 311 and the inner surface of the housing body 121. In this case, the other of the light emitting element and the light receiving element is arranged at a position where the light emitting element can receive light.

<Fourth embodiment>
In the embodiment described above, the vacuum cleaner 101 removes dust attached to the scraping rollers 131, 132 by increasing the peripheral speed of the scraping rollers 131, 132. Alternatively or additionally, the vacuum cleaner 101 may remove dust attached to the scraping rollers 131 and 132 by increasing the suction force of the suction source 103.

As shown in FIG. 16, the suction source 103 includes a suction fan 133 that generates suction force. Further, a control unit 264 for switching the operation of the suction fan 133 from a base operation operation to a removal operation for promoting the removal of dust is also arranged within the suction source 103. The control unit 264 is configured to instruct the suction fan 133 about the rotation speed.

The configuration for detecting dust attached to the scraping rollers 131 and 132 is the same as that described in connection with the first to third embodiments (that is, the current detection section 163, the optical detection section 168).

When dust attached to the scraping rollers 131 and 132 is not detected, the control unit 264 sets the rotation speed of the suction fan 133 to a predetermined base value. This base value is set to such a value that the noise from the suction fan 133 does not become excessively large, and at the same time, it is possible to generate suction force sufficient to suck in dust in the suction space 110. The suction fan 133 is controlled by the control unit 264 and operates at a base value of rotation speed (base operation operation).

On the other hand, if adhesion of dust is detected on at least one of the scraping rollers 131 and 132, the control unit 264 sets the rotation speed of the suction fan 133 to a value larger than the base value. In this case, the suction fan 133 generates a larger suction force than during the base operation (removal operation). Since this large suction force also acts on the suction space 110, the removal of dust attached to the scraping rollers 131, 132 in the suction space 110 is facilitated.

In the first to fourth embodiments, the suction tool 100 and/or the vacuum cleaner main body are 102 performs a removal operation. Alternatively, the removal operation of the suction tool 100 and/or the cleaner body 102 may be started by the user operating a switch provided on the operating section 108, for example. That is, by operating a switch, the control units 164, 264 may increase the rotation speeds of the motors 151, 152 and/or the suction fan 133, or may set a difference in the rotation speeds of these motors 151, 152. .

<Fifth embodiment>
In the embodiment described above, the removal of dust attached to the scraping rollers 131 and 132 is facilitated by increasing the circumferential speed of the scraping rollers 131 and 132 and/or increasing the suction force of the suction source 103. That is, in the embodiment described above, the operation of the vacuum cleaner 101 itself promotes the removal of dust. Additionally, the vacuum cleaner 101 prompts the user to remove dust from the scraping rollers 131, 132 by performing a notification operation to notify the user of the adhesion of dust to the scraping rollers 131, 132. You can.

In order to notify the user of the adhesion of dust to the scraping rollers 131 and 132, the suction tool 100 has a notification section 134, as shown in FIG. 17. The notification section 134 is constituted by a light source provided on the upper surface of the housing body 121 of the suction housing 120. This light source is configured to be able to change the light emission pattern (for example, continuous light emission or blinking) and the light emission color.

The notification section 134 is electrically connected to the control section 364, as shown in FIG. The control unit 364 is configured to instruct the notification unit 134 on a light emission pattern and/or a light emission color. Note that the configuration for detecting dust attached to the scraping rollers 131 and 132 is the same as that described in connection with the first to third embodiments (that is, the current detection unit 163, the optical detection unit 168).

If dust attached to the scraping rollers 131 and 132 is not detected, the control unit 364 controls the notification unit 134 to set the notification unit 134 to a predetermined light emission pattern (for example, continuous light emission) and/or light emission color. (for example, green) (base operation operation).

On the other hand, if dust is detected on at least one of the scraping rollers 131 and 132, the control unit 364 causes the notification unit 134 to emit light in a light emission pattern (for example, blinking) different from the above-mentioned light emission pattern. control. Additionally and/or alternatively, the control unit 364 may control the notification unit 134 to emit light in a different emission color (for example, red) from the above-mentioned emission color (notification operation).

By changing the light emitting pattern and/or the light emitting color of the notification unit 134, the vacuum cleaner 101 can make the user aware that dust is attached to the scraping rollers 131, 132, and make the user aware of the dust. Can encourage removal.

In the embodiment described above, the notification section 134 is provided in the suction tool 100. Alternatively, the notification section 134 may be provided at another location (for example, the operation section 108 of the vacuum cleaner body 102) where the user can easily notice the change in the light emission pattern and/or the light emission color. .

In the embodiment described above, the notification unit 134 notifies the user that dust is attached to the scraping rollers 131 and 132 by changing the light emission pattern and/or the light emission color. Alternatively, the notification unit 134 may be configured to notify the user of the adhesion of dust by sound or vibration.

In the above-described embodiment, the vacuum cleaner 101 not only performs the notification operation by the notification unit 134, but also performs the removal operation (first embodiment, second embodiment, and fourth embodiment) in the vacuum cleaner main body 102 and/or the suction tool 100. form) is also being carried out. Alternatively, the vacuum cleaner 101 performs only the notification operation by the notification unit 134 without performing the removal operation in the cleaner body 102 and/or the suction tool 100, and the user is informed of the dust removal from the scraping rollers 131 and 132. It may be configured to encourage the removal of. That is, when the control section 364 is provided, the control section 164 (first embodiment, second embodiment) that increases the speed of the motors 151, 152 and the control section 264 (second embodiment) that increases the suction force of the vacuum cleaner main body 102 are provided. Embodiment 4) may not be provided.

The principle of this embodiment is suitably utilized in a device used for cleaning work.

100... Suction tool 101... Vacuum cleaner 102... Vacuum cleaner body 110... Suction space 120... Suction housing 131... Scraping roller 132...Scraping roller 134...Notification unit 140...Separation detection unit 151...Motor 152...Motor 163...Current detection unit 164 ... Control section 168 ... Optical detection section 264 ... Control section 312 ... Brush section 364 ... Control section

Claims (12)

A vacuum cleaner body that generates suction power to suck up dust,
a suction tool that is attached to the vacuum cleaner body and scrapes off dust using a scraping roller and another scraping roller that is arranged in a horizontal direction with respect to the scraping roller ;
a control unit that causes the suction tool to perform a removal operation that promotes removal of dust attached to the scraping roller and the other scraping roller ,
The scraping roller and the other scraping roller are each provided with a brush part on an outer periphery thereof, which is rubbed against a floor surface and elastically deformed when the scraping roller and the other scraping roller rotate. ,
The suction tool includes a motor that generates a driving force that drives the scraping roller, and another motor that generates a driving force that rotates the other scraping roller,
The control unit controls the motor so that the scraping roller rotates at a peripheral speed higher than the peripheral speed of the scraping roller during a predetermined base operation, and controls the peripheral speed of the other scraping roller. The vacuum cleaner is configured to cause the suction tool to perform the removing operation by controlling the other motor so that the peripheral speed of the scraping roller is lower than the circumferential speed of the scraping roller . The control unit is configured to adjust the peripheral speed of the scraping roller to the above after rotating the scraping roller for a predetermined period in a state where the peripheral speed of the scraping roller is higher than the peripheral speed during the base operation. The vacuum cleaner according to claim 1 , wherein the motor is controlled so as to return the circumferential speed to the peripheral speed at the time of base operation. The suction tool includes a suction housing forming a suction space that receives the suction force of the vacuum cleaner body and sucks dust;
The scraping roller and the other scraping roller are arranged in the suction space,
The vacuum cleaner according to claim 1 or 2 , wherein the control unit causes the vacuum cleaner main body to perform the removing operation by controlling the vacuum cleaner main body so that the suction force increases. The controller rotates the scraping roller for a predetermined period in a state where the peripheral speed of the scraping roller is higher than the peripheral speed during the base operation, and then adjusts the peripheral speed of the scraping roller to the base operation. controlling the motor so as to return the circumferential speed to the circumferential speed during the base operation, and controlling the other motor so that the circumferential speed of the other scraping roller becomes higher than the circumferential speed during the base operation after the predetermined period; The vacuum cleaner according to claim 1 . further comprising a current detection unit that detects current supplied to the motor and the other motor,
On the condition that the current detection unit detects that the current supplied to the motor and the other motor both exceed a first current threshold, the control unit executes the removal operation on the suction tool. The vacuum cleaner according to any one of claims 1 to 4 , wherein the vacuum cleaner is configured to further comprising a separation detection unit that detects whether the suction tool is separated from the floor surface,
A detection result indicating that the suction tool is not separated from the floor surface is obtained from the separation detection unit, and the current supplied to the motor and the other motor are both above the first current threshold. The vacuum cleaner according to claim 5 , wherein, as a condition, the control unit is configured to cause the suction tool to perform the removing operation. When a detection result indicating that the suction device is away from the floor surface is obtained from the separation detection section, the control section determines that the magnitude of the current detected by the current detection section is less than the first current threshold value. 7. The vacuum cleaner of claim 6 , wherein the vacuum cleaner is configured to cause the suction device to perform the removal operation when the current exceeds a second small current threshold. further comprising a separation detection unit that detects whether the suction tool is separated from the floor surface,
The control unit is configured to cause the suction tool to perform the removal operation on the condition that a detection result indicating that the suction tool is away from the floor surface is obtained from the separation detection section. A vacuum cleaner according to any one of claims 1 to 5. further comprising a separation detection unit that detects whether the suction tool is separated from the floor surface,
When a detection result that the suction tool is away from the floor surface is obtained from the separation detection section, a detection result that the suction tool is not separated from the floor surface is obtained from the separation detection section. 6. The control unit according to claim 1 , wherein the control unit controls the motor and the other motor so that a larger peripheral speed difference is obtained between the scraping roller and the other scraping roller than in the case of the scraping roller. The vacuum cleaner according to any one of the items above. The scraping roller and the other scraping roller are arranged such that the tip of the scraping roller and the tip of the other scraping roller face each other with a gap between them, and become thinner toward the tip. It has a tapered shape,
Claims 1 to 4 , wherein the vacuum cleaner further includes an optical detection unit that optically detects dust trapped in a space between the tip of the scraping roller and the tip of the other scraping roller. The vacuum cleaner according to any one of the above . further comprising a separation detection unit that detects whether the suction tool is separated from the floor surface,
On condition that a detection result indicating that the suction device is not separated from the floor surface is obtained from the separation detection section and the optical detection section detects dust, the control section causes the removal operation to be performed on the suction device. 11. A vacuum cleaner according to claim 10 , wherein the vacuum cleaner is configured to cause the vacuum cleaner to perform the vacuum cleaner. A vacuum cleaner that sucks dust,
A vacuum cleaner body that generates suction power to suck up dust,
a suction tool that is attached to the vacuum cleaner body and scrapes off dust using a scraping roller and another scraping roller that is arranged in a horizontal direction with respect to the scraping roller;
A removal operation that prompts the removal of dust attached to the scraping roller and the other scraping roller or a notification operation that notifies the attachment of dust to the scraping roller and the other scraping roller is performed on the cleaner body or the A control unit for causing the suction tool to execute,
The scraping roller and the other scraping roller are arranged such that the tip of the scraping roller and the tip of the other scraping roller face each other with a gap between them, and become thinner toward the tip. It has a tapered shape,
The vacuum cleaner further includes an optical detection unit that optically detects dust trapped in a space between the tip of the scraping roller and the tip of the other scraping roller,
The control unit is configured to cause the cleaner main body or the suction tool to perform the removal operation or the notification operation when the optical detection unit detects dust trapped in the space.

Images