TW202327502A - Vacuum cleaner connectable to recovery device - Google Patents

Abstract

This vacuum cleaner is configured so as to rotatably drive a rotary vane section using a motor, thereby generating a suction airflow and sucking in dust. The dust is captured by a filter unit and stored in a dust storage chamber. Dust within the dust storage chamber can be discharged upon receiving suction force of a recovery device. When this occurs, the rotary vane section can be caused to rotate by a recovery airflow originating from the suction force of the recovery device, but a motor control unit executes rotation-minimizing control to minimize the rotation of the rotary vane section at this time.

Description

Vacuum cleaner that can be connected to a recovery unit

The invention relates to a vacuum cleaner which can be connected with a recycling device.

An upright vacuum cleaner 300 shown in FIG. 12 is disclosed in JP-A-3-267032. The vacuum cleaner 300 includes: a vacuum cleaner body 310 ; a suction pipe 320 extending downward from the vacuum cleaner body 310 ; and a suction nozzle 330 connected to the lower end of the suction pipe 320 . The cleaner body 310 is configured to suck dust through the suction nozzle 330 and store the sucked dust.

Specifically, the inside of the cleaner body 310 is divided into a fan housing chamber 315 and a dust storage chamber 317 for storing dust by the filter part 313 . A suction fan 312 is arranged in the fan housing chamber 315. The suction fan 312 has a motor 321 configured to generate a driving force, and a rotating blade portion 322 rotationally driven by the motor 321 to generate a suction airflow for sucking dust.

In Japanese Patent Laying-Open No. 3-267032, as shown in FIG. 13 , in order to recover the dust stored in the dust storage chamber 317, a recovery device 400 is used. 300 Recycle Dust. The recovery device 400 has: a housing 410; a dust suction source 420, which generates suction for dust recovery; a control unit 414, which drives the dust suction source 420; a recovery chamber 440, which collects recovered dust; The chamber 440 is extended. The front end of the dust passage 430 may be connected to the dust outlet 319 provided in the dust storage chamber 317 of the vacuum cleaner 300 . The recovery device 400 is configured to recover the dust in the dust storage chamber 317 to the recovery chamber 440 through the dust flow path 430 by the suction force of the dust suction source 420 .

In the vacuum cleaner 300 of Japanese Patent Laid-Open No. 3-267032, during the cleaning operation, the suction airflow for sucking dust into the dust storage chamber 317 is generated by the suction force of the suction fan 312. When the dust is recovered, the suction force of the dust suction source 420 will generate a recovery airflow that sucks out the dust from the dust storage chamber 317 . The recycling airflow generated by the suction force of the suction source 420 may generate a rotational force such as rotating the rotating blade portion 322 of the suction fan 312 . At this time, due to the rotation of the rotating blade portion 322 , an uncomfortable noise may be generated for the user.

An object of the present disclosure is to provide a vacuum cleaner which suppresses the rotation of the rotating blade part due to the recovery air flow in the vacuum cleaner and suppresses the generation of noise caused by the rotation of the rotating blade part.

The vacuum cleaners of this disclosure are configured to attract dust. The vacuum cleaner is equipped with: a motor configured to generate driving force; a rotating blade portion configured to be rotated and driven by the motor to generate an inhaled air flow that inhales dust; a dust storage chamber accommodates a filter portion that captures dust contained in the inhaled air flow, and stores the filtered air. The dust captured by the department; and the motor control department, which controls the motor. The dust storage chamber is configured to receive the suction force of the recovery device to discharge the dust in the dust storage chamber to the recovery device, and the recovery device is configured to attract the dust in the dust storage chamber. The motor control unit is configured to execute rotation suppression control that suppresses rotation of the rotating blade portion by the recovery air flow generated by the suction force of the recovery device.

According to the present disclosure, it is possible to provide a vacuum cleaner capable of suppressing the rotation of the rotary blade portion of the vacuum cleaner due to the recovery air flow from the recovery device and suppressing the generation of noise due to the rotation of the rotary blade portion.

The purpose, features, and advantages of the present invention will become more apparent with the following detailed description and attached drawings.

form for carrying out the invention

Hereinafter, although the first embodiment and the second embodiment will be described in detail while referring to the drawings, in order to facilitate understanding by those skilled in the art, for example, detailed descriptions of well-known matters may be omitted, or Repeated explanations for substantially the same configuration. In addition, the attached drawings and the following descriptions are provided to allow those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(first embodiment) (The overall structure of the vacuum cleaner) The upright vacuum cleaner 100 will be described with reference to FIGS. 1 and 2 . As shown in FIG. 1 , the vacuum cleaner 100 has: a suction nozzle 130 for sucking dust on the floor; a vacuum cleaner body 110 with the suction nozzle 130 installed; The cleaner body 110 and the handle 140 can tilt in the front-rear direction relative to the suction nozzle 130 . In FIGS. 1 and 2 , the cleaner body 110 and the handle 140 are in an upright posture relative to the suction nozzle 130 , and do not tilt forward from the upright posture. When the vacuum cleaner 100 is in use, the vacuum cleaner body 110 and the grip portion 140 are held by the user in a posture tilted backward relative to the suction nozzle 130 .

The suction nozzle 130 has a nozzle cover 132 wider than the cleaner body 110 to form a wider suction space 131 for sucking dust. The suction space 131 is opened toward the floor surface in the front side portion of the nozzle cover 132 . On the rear side of this opening portion, the suction space 131 is closed by the bottom of the nozzle cover 132 . A rotary scraper brush 133 is arranged in the suction space 131 , and the scraper brush 133 is exposed from the nozzle cover 132 through the opening of the suction space 131 so as to be able to contact the floor surface.

The cleaner body 110 has a case 111 that is elongated in the vertical direction. The lower end of the housing 111 is mounted on the rear of the nozzle cover 132 to allow the cleaner body 110 to tilt forward and backward. The upper portion of the housing 111 is tapered toward the upper end 112 of the housing 111 , and the handle portion 140 is extended upward from the upper end 112 . The grip portion 140 is a rod-shaped portion having a thickness that can be gripped by a user. As shown in FIG. 2 , an operation part 141 (operation button) operated by the user is provided on the grip part 140 .

The casing 111 is configured to house various components for sucking up dust on the floor surface and storing the sucked up dust. In detail, as shown in FIG. 1 , in the housing 111, there are: a fan housing chamber 153 disposed on the upper portion of the housing 111; a dust storage chamber 152 disposed on the lower side of the fan housing chamber 153; and suction The pipe 113 is arranged on the lower side of the dust storage chamber 152 and extends in the vertical direction. The fan accommodation chamber 153, the dust storage chamber 152, and the suction pipe 113 are interconnected.

A suction fan 116, a battery 117, and a fan control unit 170 are arranged in the fan housing chamber 153. The above-mentioned suction fan 116 is to generate an upward suction airflow for sucking up dust on the floor surface. 116 supplies power, and the aforementioned fan control unit 170 is used to activate the suction fan 116 .

The suction pipe 113 is fixed in the housing 111 , and when the cleaner body 110 tilts backward from the upright posture, it will tilt backward together with the housing 111 . When the cleaner body 110 is in an upright position, the lower end of the suction pipe 113 is closed by the bottom of the nozzle cover 132 . On the other hand, when the vacuum cleaner body 110 has been tilted backward from the upright position, the inner space of the suction pipe 113 and the nozzle cover 132 are connected by the rotation of the lower end of the suction pipe 113 (refer to arrow A in FIG. 1 ). The suction spaces 131 will communicate with each other.

A check valve 114 is arranged at the upper end of the suction pipe 113 , and the check valve 114 is formed to seal the opening of the upper end of the suction pipe 113 when the suction fan 116 is stopped. The check valve 114 is deformed by the upward suction force of the suction fan 116 to open the opening of the upper end of the suction pipe 113 .

The suction fan 116 includes a rotary vane unit 180 composed of a plurality of vane plates, and a motor 182 that rotationally drives the rotary vane unit 180 . When the user operates the operation part 141 to activate the suction fan 116 , a signal for actuating the suction fan 116 is sent from the operation part 141 to the fan control part 170 . When the user operates the operation part 141 to stop the suction fan 116 , a signal for stopping the suction fan 116 is sent from the operation part 141 to the fan control part 170 .

As shown in FIG. 2 , the front wall of the casing 111 is provided with: an exhaust port 151 connected to the fan housing chamber 153 ; The suction airflow generated by the suction force of the suction fan 116 is exhausted from the fan accommodating chamber 153 to the outside of the vacuum cleaner 100 through the exhaust port 151 . The exhaust port 151 is formed so as to be in contact with the vent port 236 of the recovery device 200 described later. The electric contact 171 is electrically connected to the fan control unit 170 and protrudes so as to contact a contact portion 283 of the recovery device 200 described later. The magnetic plate 173 is formed so as to be in contact with a holding portion 297 of the recovery device 200 described later.

As shown in FIG. 3 , a container-shaped filter unit 115 opening downward is arranged in the dust storage chamber 152 . The filter unit 115 is configured to allow the passage of the suction airflow generated by the suction force of the suction fan 116 and to capture dust contained in the suction airflow. The filter unit 115 is constituted by, for example, a nonwoven filter. The dust captured by the filter unit 115 is stored in the dust storage chamber 152 .

The dust storage chamber 152 is provided with: a dust discharge port 124 opened on the front wall of the housing 111 ; and a cover 121 formed to be rotatable to open and close the dust discharge port 124 . The cover body 121 is configured to be able to rotate between a closed posture and an open posture (refer to the arrow in FIG. 3 ). The attitude of the state in which the dust discharge port 124 is opened by rotating a predetermined angle (rotating angle below 90°) downward.

As shown in FIG. 3 , the dust discharge port 124 is formed to face a recovery port 216 of the recovery device 200 described later when the vacuum cleaner 100 is connected to the recovery device 200 , and is connected to the dust flow path 230 . At this time, the cover body 121 is rotated to enter the dust flow path 230 to take an open position, so that the dust storage chamber 152 and the dust flow path 230 communicate with each other. When the dust storage chamber 152 is in communication with the dust flow path 230 , the dust stored in the dust storage chamber 152 can flow into the dust flow path 230 by the recovery airflow generated by the suction force of the recovery device 200 described later. That is, vacuum cleaner 100 is configured to be able to discharge dust from dust storage chamber 152 to recovery device 200 in a state where vacuum cleaner 100 is connected to recovery device 200 .

(Description of the motor and control unit of the vacuum cleaner) Here, the structure of the motor 182 and the fan control part 170 in the cleaner 100 is demonstrated, referring FIG. 4. FIG. The motor 182 includes: a motor body 186 ; and a motor circuit 184 that transmits electric current supplied from the battery 117 to the motor body 186 . The motor circuit 184 converts the DC current supplied from the battery 117 through the fan control unit 170 into a three-phase AC drive current for driving the motor body 186 and supplies the motor body 186 .

The motor body 186 includes: a cylindrical rotor 188 ; a stator 190 formed to surround the rotor 188 in the circumferential direction; The inner peripheral surface of the stator 190 is formed in a shape along the outer peripheral surface of the rotor 188 as a whole. The rotor 188 is connected to the rotating blade portion 180 and rotates coaxially with the rotating blade portion 180 (see FIG. 1 ).

Three cores 192 arranged at predetermined intervals are provided on the inner peripheral surface of the stator 190 . Coils 192 a to 192 c are wound around the three cores 192 , so that a three-phase AC drive current (U phase, V phase, and W phase) flows from the motor circuit 184 . When the driving current flows through the coils 192a-192c, a rotating magnetic field will be formed around the coils 192a-192c. This rotating magnetic field is a magnetic field that varies with time, and generates a magnetic force on the rotor 188 that rotates the rotor 188 .

The rotor 188 is provided with a plurality of magnetic parts arranged so that a plurality of magnetic poles appear in the circumferential direction of the rotor 188 . In FIG. 4 , N poles and S poles appear on the outer peripheral surface of the rotor 188 with symbols "N" and "S". As described above, in the present embodiment, the motor body 186 is constituted by a binary three-phase synchronous motor. However, the configuration of the motor body 186 is not limited to this.

The motor circuit 184 is an inverter circuit configured by providing six switching elements Tr1 to Tr6 for converting the supplied DC current into a three-phase AC drive current. The fan control unit 170 controls the motor circuit 184 to switch the switching elements Tr1 - Tr6 into an ON state where current can flow and an OFF state where no current flows. For the switching elements Tr1 to Tr6, for example, semiconductor switching elements such as IGBT (Insulated Gate Bipolar Transistor) can be used. In addition, a freewheeling diode (FWD) for freewheeling the load current of the switching elements Tr1 - Tr6 may also be provided in the motor circuit 184 . In addition, a pulse modulator may also be provided in the motor circuit 184, and the aforementioned pulse modulator is used to control the rotation speed of the motor body 186 through PWM control (pulse width modulation control).

The fan control unit 170 includes a motor control unit 175 for controlling the rotational drive of the motor 182 , a storage amount detection unit 177 for detecting the storage amount of the battery 117 , and a charging circuit 178 for supplying electric power to the battery 117 . When vacuum cleaner 100 is connected to recovery device 200 , fan control unit 170 is electrically connected to recovery control unit 260 of recovery device 200 described later, and power is supplied from recovery control unit 260 to fan control unit 170 . When power is being supplied from recovery control unit 260 to fan control unit 170 and power is not being supplied from battery 117 to motor 182 , power is supplied from charging circuit 178 to battery 117 to charge battery 117 .

(The overall structure of the recovery device) Next, a collection device 200 for collecting dust from the dust storage chamber 152 of the vacuum cleaner 100 in a state connected to the vacuum cleaner 100 will be described with reference to FIGS. 5 to 7 . The recovery device 200 is configured to be connectable to the vacuum cleaner 100 , and includes a housing 210 , a dust flow path 230 , a recovery chamber 240 , a dust suction source 250 , and a recovery control unit 260 .

As shown in FIG. 5 , the dust flow path 230 is connected to the recovery port 216 and the recovery chamber 240 at the back of the casing 210 . The dust suction source 250 generates suction under the control of the recycling control unit 260 to generate a recycling airflow for sucking dust from the dust storage chamber 152 of the vacuum cleaner 100 to the recycling chamber 240 of the recycling device 200 . Electric power is supplied to the recovery control unit 260 from an external power source through a power cable.

Formed on the left and right sides of the housing 210 are: an air intake port for allowing air to flow into the housing 210 from the outside; and an exhaust port for allowing air to flow out from the housing 210 to the outside. As shown in FIG. 6 , the rear of the casing 210 is formed by a connecting wall 214 , and the vacuum cleaner body 110 is connected to the connecting wall 214 . As shown in FIG. 7 , a groove portion 215 extending vertically is formed on the connection wall 214 , and a contact portion 283 , a holding portion 297 , a vent hole 236 , and a recovery port 216 are provided in the groove portion 215 . As shown in FIG. 6 , the groove portion 215 is formed to be complementary to the front portion of the cleaner body 110 so as to be embedded in the front portion of the cleaner body 110 in an upright position.

The contact portion 283 is disposed at a position facing the electrical contact 171 of the vacuum cleaner 100 when the vacuum cleaner body 110 is inserted into the groove portion 215 . The contact portion 283 can be exposed and hidden in the hole formed in the connection wall 214, and is given potential energy in a direction protruding from the hole. When the cleaner body 110 is inserted into the groove portion 215 , the contact portion 283 will contact the electrical contact 171 , and the contact portion 283 and the electrical contact 171 will be in an electrically connected state. At this time, the connection circuit 203 shown in FIG. 8 is formed. In the state where the cleaner body 110 is not inserted into the groove portion 215 , the contact portion 283 and the electrical contact 171 are insulated from each other.

The holding portion 297 is disposed at a position facing the magnetic plate 173 of the cleaner body 110 when the cleaner body 110 is inserted into the groove portion 215 . The holding portion 297 is constituted by, for example, a magnet plate capable of magnetically attracting the magnetic plate 173 . The vacuum cleaner body 110 is fixed on the recycling device 200 by the magnetic force acting between the holding portion 297 and the magnetic plate 173 . That is, this magnetic force is a holding force for holding the connection state of the recovery device 200 and the cleaner body 110 . Thereby, in the state where the cleaner body 110 is inserted into the groove portion 215 , the position and posture of the cleaner 100 relative to the recovery device 200 are maintained.

A space for collecting dust that has been recovered from the cleaner 100 is formed in the recovery chamber 240 . A circular communication port is formed on the bottom wall 245 of the recovery chamber 240 , and the communication port communicates the space in the recovery chamber 240 with the dust suction source 250 . As shown in FIG. 6 , a dust filter 247 is installed on the communicating port. The aforementioned dust filter 247 allows air to pass through on the one hand, and captures dust contained in the air on the other hand.

The dust collection source 250 is configured to suck the air in the recovery chamber 240 through the dust removal filter 247 . When the vacuum cleaner 100 is connected to the recovery device 200 , the suction force of the dust suction source 250 will act on the cover 121 of the vacuum cleaner 100 through the recovery chamber 240 and the dust flow path 230 . The dust suction source 250 is configured to obtain a suction force of such a magnitude that the lid body 121 can be tilted from the closed position to the open position, and the dust in the dust storage chamber 152 can be sucked. The dust suction source 250 is composed of, for example, a fan and a motor.

The air sucked by the dust suction source 250 flows into the space formed between the recovery chamber 240 and the casing 210 , and is exhausted to the outside of the casing 210 through the exhaust port. The flow of this air is the recovery airflow shown in FIG. 5 , and the recovery airflow passes through the fan housing chamber 153 , the dust storage chamber 152 , the dust flow path 230 , the recovery chamber 240 , and the dust suction source 250 in sequence.

(Structure of detection circuit) Here, connection circuit 203 for detecting that vacuum cleaner 100 is connected to recovery device 200 will be described with reference to FIG. 8 . When the vacuum cleaner 100 is connected to the recovery device 200 , a connection circuit 203 is formed. The connection circuit 203 is used to detect that the vacuum cleaner body 110 is connected to the recovery device 200 . The connection circuit 203 is constituted by the circuit 201 formed in the vacuum cleaner body 110 and the circuit 202 formed in the recovery device 200 .

The electric circuit 201 of the vacuum cleaner 100 includes a first current path 172 electrically connected to the fan control unit 170 and the electric contact 171 . In circuit 201 , fan control unit 170 is electrically connected to battery 117 , and battery 117 is electrically connected to suction fan 116 .

The circuit 202 of the recovery device 200 includes a second current path 284 electrically connecting the recovery control unit 260 and the contact portion 283 , and a connection detection unit 286 that detects the current flowing through the second current path 284 . In the circuit 202, the recovery control part 260 is electrically connected to the dust collection source 250, and the electric power from an external power supply is supplied to the recovery control part 260 through a power cable.

When the vacuum cleaner 100 is connected to the recovery device 200, the first current path 172 and the second current path 284 will be electrically connected by the contact part 283 and the electrical contact point 171, forming a connection between the fan control part 170 and the second current path 284. The connection circuit 203 to which the recovery control unit 260 is electrically connected. At this time, if the electric power from the external power source is being supplied to the recovery control unit 260 , a current flows in the connection circuit 203 . When the connection detection part 286 has detected the current flowing in the second current path 284 of the connection circuit 203, a connection detection signal indicating that the vacuum cleaner 100 has been connected to the recovery device 200 is sent from the connection detection part 286 to the recovery control part. 260.

The recovery device 200 is configured to activate the dust suction source 250 in response to a connection detection signal from the connection detection unit 286 to perform dust collection for sucking dust from the dust storage chamber 152 to the recovery chamber 240 . When the dust collection source 250 of the collection device 200 is activated to start dust collection, the cleaner 100 is configured to perform rotation suppression control to suppress the rotation of the rotating blade part 180 caused by the collection airflow. The rotation suppression control may be started when the recovery control unit 260 notifies the fan control unit 170 of start of dust recovery, or may be started when the user operates the operation unit 141 and instructs the motor 182 to stop.

(Explanation of the operation and control method of the vacuum cleaner) When the cleaning operation by vacuum cleaner 100 starts, fan control unit 170 receives a signal for activating suction fan 116 from operation unit 141 to activate suction fan 116 . At this time, power is supplied from battery 117 to suction fan 116 . Specifically, the motor control unit 175 makes the drive current flow to the coils 192a to 192c while switching the on and off states of the switching elements Tr1 to Tr6 of the motor circuit 184, so that the rotor 188 is rotated around the coils 192a to 192c. rotating magnetic field.

During this period, the rotor 188 is rotated by the rotating magnetic field formed around the coils 192a to 192c, and the rotating blade part 180 is rotationally driven along with the rotation of the rotor 188 . Thereby, the suction fan 116 will generate suction force to generate a suction airflow flowing from the suction nozzle 130 to the suction pipe 113 , the dust storage chamber 152 , the fan accommodation chamber 153 , and the exhaust port 151 . In the dust storage chamber 152 , dust contained in the suction airflow is captured by the filter unit 115 and stored in the dust storage chamber 152 .

When the cleaning operation performed by the vacuum cleaner 100 is finished, the fan control unit 170 receives a signal for stopping the suction fan 116 from the operation unit 141 to stop the operation of the suction fan 116 .

After the cleaning operation performed by the vacuum cleaner 100 is completed, in order to recover the dust stored in the dust storage chamber 152 from the vacuum cleaner 100 to the recovery device 200, the user can connect the vacuum cleaner 100 to the recovery device 200 to carry out the process from the vacuum cleaner 100 to the recovery device. 200 dust recovery. Specifically, when the recovery control unit 260 receives the connection detection signal from the connection detection unit 286 , it activates the dust suction source 250 . As a result, suction for collecting dust from dust storage chamber 152 into recovery chamber 240 is generated.

With this attractive force, the cover body 121 of the cleaner 100 takes an open posture, and the dust outlet 124 is opened. At this time, the dust storage chamber 152 and the fan housing chamber 153 are in a state of being in communication through the dust flow path 230 . In this state, by the suction force of the dust suction source 250, the recycling airflow shown by the arrow in FIG. 5 will be generated. The recycled airflow flows into the casing 210 from the suction port provided on the side of the casing 210, and passes through the ventilation port 236, the exhaust port 151, the fan accommodation chamber 153, the dust storage chamber 152, and the dust discharge port 124 in sequence. , the dust flow path 230, and the recovery chamber 240. The dust is recovered from the dust storage chamber 152 to the recovery chamber 240 through the dust flow path 230 by the recovery air flow. In detail, the dust flowing along the recycling airflow is captured by the dust filter 247 and stored in the recycling chamber 240 .

As shown in FIG. 5 , the recycled air flow passes through the fan housing chamber 153 . At this time, the recycling airflow may act to rotate the rotating blade part 180 . Assuming that the rotating blade part 180 has been rotated by the recovery air flow, the rotating sound of the rotating blade part 180 may be generated. In order to suppress this rotation sound, fan control unit 170 performs rotation suppression control for suppressing rotation of rotating blade unit 180 . Hereinafter, the rotation suppression control in the cleaner 100 is demonstrated.

(Description of rotation suppression control) When the fan control unit 170 receives the operation of the operation unit 141 to stop the suction fan 116 (that is, the motor 182 ), or when a signal indicating start of dust collection is received from the collection device 200 , the rotation suppression control is started. This recovery suppression control is executed covering the period of dust recovery by the recovery device 200 . Rotation suppression control can be performed in the following two ways.

One of these methods is the first rotation suppression control in which the rotation of the rotating blade part 180 is suppressed by using the electric power of the battery 117 to flow a current to the coils 192 a to 192 c to form a static magnetic field. The first rotation suppression control is executed when sufficient electric power is stored in the battery 117 to form the above-mentioned static magnetic field. In other words, the first rotation suppression control is executed when the stored power of the battery 117 detected by the stored power detection unit 177 is higher than a predetermined electric power threshold. In addition, since the 1st rotation suppression control utilizes the electric power of the battery 117, it is preferable to execute when the signal which shows the start of dust collection is received from the collection apparatus 200. In this case, power consumption of the battery 117 can be prevented during the period before the cleaner 100 is connected to the recovery device 200 .

Another form is the second rotation suppression control in which the rotation of the rotary blade part 180 is suppressed by forming a closed circuit in which the coils 192a to 192c generate electromotive force. The second rotation suppression control can be executed without consuming the electric power of the battery 117 , and can be executed when the storage amount of the battery 117 is not higher than the electric power threshold value. Therefore, the second rotation suppression control can also be executed in response to receiving an operation of the operation unit 141 to stop the suction fan 116 .

Hereinafter, the first rotation suppression control and the second rotation suppression control will be specifically described with reference to FIGS. 9 and 10 . In addition, FIG. 9 shows the state of the motor circuit 184 when the first rotation suppression control is performed. The state of the motor circuit 184 when the second rotation suppression control is performed is shown in FIG. 10 .

In the case of executing the first rotation suppression control, as shown in FIG. Tr6 is set to OFF state. In this state, an electric path 195 is formed in the motor circuit 184 and the motor body 186 , and the electric path 195 allows the electric current from the battery 117 to flow in a fixed direction. With the current flowing in a fixed direction, a static magnetic field that does not vary with time is formed around the coils 192 a - 192 c.

Specifically, among the three coils 192 a to 192 c , in the U-phase coil 192 a , a current that appears to have an S pole with respect to the rotor 188 flows. On the other hand, in the V-phase coil 192 c and the W-phase coil 192 b , an N-pole current appears to flow to the rotor 188 . In this state, the surface on the N-axis side among the magnetic parts of the rotor 188 is magnetically attracted to the U-phase coil 192a. Moreover, the surface on the S pole side among the magnetic parts of the rotor 188 is magnetically attracted to the V-phase and W-phase coils 192c and 192b. Therefore, the rotor 188 will try to maintain this rotational position, and the rotation of the rotor 188 and thus the rotating blade portion 180 can be restrained. In other words, between the coils 192 a to 192 c and the rotor 188 , a braking force that suppresses the rotation of the rotor 188 and the rotating blade portion 180 is generated.

In the case of executing the second rotation suppression control, as shown in FIG. Disabled. In this state, an energization path 197 , which is a closed circuit in which the coils 192 a to 192 c are electrically connected to each other, is formed. In this state, the conduction path 197 is electrically disconnected from the battery 117 by the off-state switching elements Tr1 , Tr3 , and Tr5 , and the current from the battery 117 does not flow through the conduction path 197 .

When the rotating blade portion 180 rotates in the state where the electric path 197 is formed in the motor 182, a magnetic field that changes with time due to the rotation of the magnetic portion of the rotor 188 is generated in the coils 192a to 192c, respectively, as shown in the figure. The electromotive force shown by the arrow in 10. Due to this electromotive force, a current flows in the conduction path 197 to heat the conduction path 197 . In other words, the rotational energy of the rotor 188 is converted into heat energy in the energization path 197 . As a result, it is possible to obtain a state in which a braking force that suppresses the rotation of the rotor 188 acts on the rotor 188 .

In addition, when the second rotation suppression control is performed, the storage amount of the battery 117 decreases. Therefore, while the second rotation suppression control is being executed, fan control unit 170 supplies electric power to battery 117 via charging circuit 178 to charge battery 117 .

In the above embodiment, when the user is using the vacuum cleaner 100 for cleaning, the fan control unit 170 controls the motor circuit 184 to generate a rotating magnetic field that rotates the rotor 188 around the coils 192a-192c. around. As a result, the motor 182 rotationally drives the rotary blade portion 180 . By the rotation of the rotating blade portion 180 , an inhalation airflow that attracts dust into the vacuum cleaner 100 is generated. The dust included in the inhaled airflow is captured by the filter unit 115 and stored in the dust storage chamber 152 . When the dust stored in the dust storage chamber 152 is to be recycled to the recycling device 200 , the dust in the dust storage chamber 152 is discharged from the dust storage chamber 152 by the suction force from the recycling device 200 . At this time, the recycling airflow generated by the suction force of the recycling device 200 may act to rotate the rotating blade part 180 of the cleaner 100 .

Assuming that when the user operates the operation part 141 to stop the motor 182, if the torque applied to the motor 182 is zero, the rotating blade part 180 may rotate freely due to the recovered airflow, making the rotation sound of the rotating blade part 180 louder. . In order to suppress the rotation sound of the rotating blade portion 180 as described above, the fan control portion 170 executes rotation suppression control.

When the vacuum cleaner 100 is connected to the recovery device 200 , if the storage amount of the battery 117 detected by the storage amount detection unit 177 is higher than the power threshold, the fan control unit 170 executes the first rotation suppression control. In this case, the fan control unit 170 controls the switching elements Tr1 to Tr6 of the motor circuit 184 so as to generate static magnetic fields in the coils 192a to 192c. This static magnetic field acts to suppress the rotation of the rotor 188 and thus the rotating blade portion 180 .

When the vacuum cleaner 100 is connected to the recovery device 200 , if the storage amount of the battery 117 detected by the storage amount detection unit 177 is not higher than the power threshold, the fan control unit 170 executes the second rotation suppression control. In this case, the fan control unit 170 controls the switching elements Tr1 to Tr6 of the motor circuit 184 so as to form a closed circuit 197 that is a closed circuit in which the coils 192 a to 192 c are electrically connected to each other. In this state, when the rotating blade portion 180 is rotated by the recovery air flow, electromotive force is generated in the coils 192 a to 192 c, and a current flows through the conduction path 197 . When current flows in the conduction path 197, the conduction path 197 will generate heat due to Joule heat. In this state, a part of the rotational energy intended to rotate the rotating blade portion 180 is consumed as heat energy in the energization path 197 . Since only the remaining rotational energy is contributed to the rotation of the rotary blade part 180, the rotation of the rotary blade part 180 can be suppressed.

When the fan control unit 170 executes the first rotation suppression control, the greater the current supplied to the coils 192a to 192c, the greater the braking force for stopping the rotor 188 at a predetermined rotational position. Therefore, it is permissible to keep the rotor 188 and the rotating blade portion 180 in a stationary state. However, in the first rotation suppression control, electric power for supplying current to the coils 192 a to 192 c must be stored in the battery 117 . Therefore, the first rotation suppression control is executed when the charge amount of the battery 117 is higher than a predetermined threshold value.

On the other hand, in the second rotation suppression control, it is not necessary to supply electric power to the coils 192a to 192c. Therefore, even if electric power is not stored in the battery 117, the second rotation suppression control can be executed. In addition, since the second rotation suppression control generates electromotive force in the coils 192a to 192c due to the rotation of the rotor 188 to generate a braking force, the rotor 188 and the rotating blade portion 180 may rotate at a certain rotational speed. However, the first rotation suppression control does not have to be executed as long as the rotation speeds of the rotor 188 and the rotating blade portion 180 can be sufficiently reduced by the second rotation suppression control. That is, even if a sufficient amount of electric power is stored in the battery 117, the second rotation suppression control can be executed. In this case, the storage amount detection unit 177 for detecting the storage amount of the battery 117 may also be omitted.

In the above-mentioned embodiment, since the storage capacity of the battery 117 decreases when the second rotation suppression control is performed, the fan control unit 170 supplies power to battery 117 to charge the battery 117. Alternatively, the fan control unit 170 may charge the battery 117 after the second rotation suppression control.

In the above embodiment, whether or not the vacuum cleaner 100 is connected to the recovery device 200 is determined based on whether or not the connection detection unit 286 detects the current flowing through the second current path 284 . As an alternative, a mechanical switch may also be provided on the recovery device 200 , the aforementioned mechanical switch is pressed by the vacuum cleaner 100 when the vacuum cleaner 100 is connected to the recovery device 200 . The connection detection unit 286 can also be configured to detect the state of the mechanical switch, so as to determine that the vacuum cleaner 100 is connected to the recovery device 200 .

In the above embodiment, when performing the first rotation suppression control, the fan control unit 170 causes all the coils 192a to 192c to generate static magnetic fields. Alternatively, the fan control unit 170 may cause one of the coils 192a to 192c to generate a static magnetic field.

In the above-described embodiment, the first rotation suppression control is executed on the condition that the charge amount of the battery 117 is higher than a predetermined threshold. Alternatively, if another electric power source is provided that can supply the electric power required to generate the static magnetic field in the coils 192a to 192c, only the first rotation suppression control may be executed. Alternatively, when the vacuum cleaner 100 is connected to the recovery device 200, when power is supplied from the recovery device 200 to the coils 192a~192c of the motor 182 through the connection circuit 203 and the fan control unit 170, only the first 1 Rotation inhibition control.

(second embodiment) In the vacuum cleaner 100 of the second embodiment, as shown in FIG. 11 , the fan control unit 170 further has a recovery instruction unit 179 for sending an instruction for dust recovery to the recovery device 200, which is different from that of the vacuum cleaner 100 of the first embodiment. different. In this aspect, the rotation suppression control of the 1st rotation suppression control is performed, and the rotation suppression control of the 2nd rotation suppression control is not performed.

The recovery instruction unit 179 of the vacuum cleaner 100 is configured to send a signal indicating an instruction to collect dust to the recovery control unit 260 of the recovery device 200 on the condition that the storage capacity of the battery 117 is higher than a predetermined power threshold. When the vacuum cleaner 100 is connected to the recovery device 200 , the recovery control unit 260 of the recovery device 200 activates the dust suction source 250 on the condition that the signal indicating the dust recovery instruction is received from the recovery instruction unit 179 . At this time, since the battery 117 has a storage capacity higher than a predetermined electric power threshold, the fan control unit 170 executes the first rotation suppression control. That is, the fan control unit 170 forms a static magnetic field around the coils 192 a to 192 c to suppress the rotation of the rotating blade unit 180 .

On the other hand, if the storage capacity of the battery 117 is not higher than the predetermined power threshold, even if the vacuum cleaner 100 is connected to the recovery device 200, the recovery instruction unit 179 will not send a signal indicating the dust recovery instruction to the recovery device 200 . In this case, since the dust recovery by the recovery device 200 is not performed, the rotation suppression control in the cleaner 100 is unnecessary. The recycling instructing unit 179 sends a signal indicating an instruction to collect dust to the recycling device 200 after the battery 117 has been charged to a storage capacity higher than a predetermined power threshold.

In the above-mentioned embodiment, the vacuum cleaner 100 is an upright type. As an alternative, the vacuum cleaner can also be of cylinder type or hand-held.

The embodiment disclosed this time is an illustration in all viewpoints, and should be understood as a non-limiting embodiment. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all changes within the meaning and scope equivalent to the claims are included.

(effect, etc.) The vacuum cleaner 100 of the above-mentioned embodiment has the following characteristics, and can exhibit the following effects.

A vacuum cleaner according to one aspect of the above-mentioned embodiment is provided with: a motor configured to generate a driving force; a rotating blade portion configured to be rotated and driven by the motor to generate an inhaled airflow that inhales dust; The filter part of the dust, and store the dust captured by the filter part; and the motor control part, control the motor. The dust storage chamber is configured to receive the suction force of the recovery device to discharge the dust in the dust storage chamber to the recovery device, and the recovery device is configured to attract the dust in the dust storage chamber. The motor control unit is configured to execute rotation suppression control that suppresses rotation of the rotating blade portion by the recovery air flow generated by the suction force of the recovery device.

In the above configuration, when the motor rotates and drives the rotating blade portion, an inhalation airflow that sucks dust into the cleaner is generated. At this time, the dust contained in the inhaled airflow is captured by the filter unit and stored in the dust storage chamber. When the dust stored in the dust storage chamber is to be recycled to the recovery device, the dust in the dust storage chamber is discharged from the dust storage chamber by the suction force from the recovery device. At this time, the recovery air flow generated by the suction force of the recovery device may act to rotate the rotary blade portion of the cleaner. During the period when the recovery airflow is generated, the motor control unit executes the rotation suppression control to suppress the rotation of the rotating blade portion, thereby suppressing the rotation sound of the rotating blade portion. As a result, generation of noise can be suppressed when dust is recovered from the cleaner to the recovery device.

In the above configuration, the motor may include a rotor connected to the rotating blade portion, a plurality of coils, and a motor circuit configured to pass current to the plurality of coils. The motor circuit has a plurality of switching elements that are turned on and off. The rotation suppression control may also include: using the motor control unit to control a plurality of switching elements to form a closed circuit in which a plurality of coils are electrically connected to each other. The current flows in the closed circuit due to the electromotive force generated in the plurality of coils when the rotor rotates with the rotating blades, thereby consuming the rotational energy of the rotating blades and the rotor as heat from the closed circuit.

In the above configuration, the motor control unit controls the plurality of switching elements of the motor circuit to form a closed circuit in which the plurality of coils are electrically connected to each other when performing the rotation suppression control. In this state, when the rotor rotates together with the rotating blade portion, the plurality of coils generate electromotive force to cause current to flow in the closed circuit, thereby heating the closed circuit. In this state, since the rotational energy of the rotating blade portion and the rotor is used to generate heat in the closed circuit, these rotations can be suppressed.

In the above configuration, the motor may include: a rotor connected to the rotating blade portion, a plurality of coils, and a motor circuit configured to supply current to the plurality of coils. The motor circuit may also have a plurality of switching elements that are turned on and off. The rotation suppression control may also include controlling the plurality of switching elements by the motor control unit so that current flows in at least one of the plurality of coils to generate a static magnetic field. When the rotor is at a predetermined rotational position, it can also be magnetically attracted by at least one coil generating a static magnetic field.

In the above configuration, the motor control unit controls the plurality of switching elements of the motor circuit to flow current to at least one of the plurality of coils to generate a static magnetic field when executing the rotation suppression control. In this state, when the rotor is at a predetermined rotational position, it is magnetically attracted by at least one coil generating a static magnetic field, so that the rotation of the rotor can be suppressed.

In the above configuration, the vacuum cleaner may further include: a battery connected to the motor circuit; a storage capacity detection unit for detecting the storage capacity of the battery; Conditions to send dust recovery instructions to the recovery device. The recovery device may also start suctioning the dust in the dust storage chamber in response to an instruction from the recovery instruction unit.

In the above configuration, since the battery is connected to the motor circuit, it is possible to drive the motor using electric power of the battery, or to perform rotation suppression control on the motor. In this case, there may also be a case where sufficient electric power is not stored in the battery to perform the rotation suppression control. That is, it is conceivable that the electric power required to generate the static magnetic field that suppresses the rotation of the motor is not stored in the battery. In order to prevent the recovery device from starting to suck the dust in the dust storage chamber in this state, the recovery instructing unit issues a dust recovery instruction to the recovery device on the condition that the storage capacity detected by the storage capacity detection unit is higher than a predetermined threshold. When the recovery device starts to suck the dust in the dust storage chamber in response to an instruction from the recovery instruction unit, the motor control unit may execute the rotation suppression control because the battery charge is higher than a predetermined threshold.

In the above configuration, the motor control unit may be configured to cause a current to flow from the battery to at least one coil among the plurality of coils to generate static electricity on the condition that the storage capacity detected by the storage capacity detection unit is higher than a predetermined threshold value. magnetic field.

In the above configuration, if the threshold value for the storage capacity is set to ensure that a static magnetic field of sufficient strength can be generated to suppress the rotation of the rotor, the current flows in at least one coil, and when the operation of the recovery device starts, the rotation can be suppressed. Control to suppress the rotation of the rotating blade part. That is, the motor control unit may flow current from the battery to at least one of the plurality of coils to generate a static magnetic field to suppress rotation of the rotor of the motor.

In the above configuration, if the stored electricity detected by the stored electricity detection unit is not higher than a predetermined threshold, the motor control unit may also control the plurality of switching elements to form a closed circuit in which the plurality of coils are electrically connected to each other. The current flows in the closed circuit due to the electromotive force generated in the plurality of coils when the rotor rotates with the rotating blades, thereby consuming the rotational energy of the rotating blades and the rotor as heat from the closed circuit.

In the above configuration, if the stored electricity detected by the stored electricity detection unit is not higher than a predetermined threshold, the motor control unit controls the plurality of switching elements to form a closed circuit in which the plurality of coils are electrically connected to each other. In this case, current flows in the closed circuit due to the electromotive force generated in the plurality of coils when the rotor rotates together with the rotating blade portion, thereby dissipating the rotational energy of the rotating blade portion and the rotor in the heat generated from the closed circuit . In this state, since the rotational energy of the rotating blade portion and the rotor is used to generate heat in the closed circuit, the rotation of these elements can be suppressed. In the rotation suppression control utilizing the heat generated by the closed circuit, the power of the battery is not consumed. Therefore, even if the stored electricity amount detected by the stored electricity amount detecting section is not higher than a predetermined threshold value, the rotation of the rotating blade section can be suppressed.

In the above configuration, the vacuum cleaner may further include: a battery connected to the motor circuit; and a charging circuit configured to receive power from the recovery device when the vacuum cleaner is connected to the recovery device, and charge the power to the battery.

In the above configuration, the charging circuit can receive electric power from the recovery device in a state where the cleaner is connected to the recovery device. Since the charging circuit can charge the electric power to the battery, the user can use the vacuum cleaner with the dust storage room empty after the recovery device has sucked the dust from the dust storage room.

In the above configuration, when the operation part is operated to instruct the operation of the motor, the motor control part can also control a plurality of switching elements to supply current to the plurality of coils through the motor circuit, and generate current from the plurality of coils to rotate the rotor. rotating magnetic field.

In the above configuration, when the operation unit is operated to instruct the operation of the motor, the motor control unit supplies current to the plurality of coils through the motor circuit. During this period, since the motor control unit controls a plurality of switching elements to generate a rotating magnetic field that rotates the rotor from a plurality of coils, the rotating blade unit connected to the rotor rotates. By the rotation of the rotating blade part, an inhaled airflow is generated to suck the dust into the vacuum cleaner. Industrial availability

The cleaner of the said embodiment is suitably utilized as the apparatus used for cleaning work.

100,300: vacuum cleaner 110,310: Vacuum cleaner body 111: shell 112: upper end 113,320: suction tube 114: check valve 115: Filtration department 116,312: attract fans 117: battery 121: cover body 124: Dust outlet 130,330: suction mouth 131: Inhalation space 132: nozzle cover 133: scraping brush 140: control department 141: Operation Department 151: Exhaust port 152,317: Dust storage room 153,315: Fan housing 170: Fan control unit 171: electric contact 172: The first current path 173: Magnetic board 175:Motor control department 177: Storage capacity detection unit 178: charging circuit 179: Recycling Instruction Department 180,322:Rotary blade part 182,321: motor 184: Motor circuit 186: Motor body 188: rotor 190: stator 192: Core 192a, 192b, 192c: coil 197: Power path 200,400: Recovery device 201,202: circuits 203: connect the circuit 210: shell 214: connecting wall 215: concave groove 216: Recovery port 230,430: dust flow path 236: Vent 240,440: Recovery Room 245: bottom wall 247: Dust filter 250,420: Vacuum source 260: Recovery Control Department 283: contact part 284: Second current path 286: Connection detection unit 297: Maintenance Department 313: Filtration Department 319: Dust outlet 410: shell 414: control department A: arrow Tr1, Tr2, Tr3, Tr4, Tr5, Tr6: switching elements

Fig. 1 is a schematic sectional view of a vacuum cleaner according to a first embodiment. Fig. 2 is a front view of the vacuum cleaner of the first embodiment. Fig. 3 is a cross-sectional view of a vacuum cleaner and a recovery device around the dust storage room in the first embodiment. Fig. 4 is a schematic functional configuration diagram of a motor and a control unit in the first embodiment. Fig. 5 is a sectional view of the vacuum cleaner and the recovery device according to the first embodiment. Fig. 6 is a cross-sectional view of the vacuum cleaner and the recovery device of the first embodiment viewed from above. Fig. 7 is a front view of the recovery device of the first embodiment. Fig. 8 is a schematic functional configuration diagram of a connection circuit in the first embodiment. Fig. 9 is a schematic functional configuration diagram of a motor in the first embodiment. Fig. 10 is a schematic functional configuration diagram of a motor in the first embodiment. Fig. 11 is a schematic functional configuration diagram of a motor and a control unit in the second embodiment. Fig. 12 is a schematic cross-sectional view of a conventional vacuum cleaner. Fig. 13 is a schematic perspective view of a conventional recovery device.

100: vacuum cleaner

110: Vacuum cleaner body

111: Shell

113: suction tube

114: check valve

115: Filtration department

116: Attract fans

117: battery

121: cover body

124: Dust outlet

130: Suction mouth

131: Inhalation space

132: nozzle cover

133: scraping brush

140: control department

151: Exhaust port

152: Dust storage room

153: fan housing

170: Fan control unit

180: rotating blade part

182: motor

A: arrow

Claims (8)

A vacuum cleaner is a vacuum cleaner configured to attract dust, which has: a motor configured to generate driving force; The rotating blade part is configured to be rotationally driven by the aforementioned motor to generate an inhalation air flow for inhaling dust; The dust storage chamber houses a filter unit that captures the dust contained in the aforementioned inhaled airflow, and stores the dust captured by the aforementioned filter unit; and a motor control unit for controlling the aforementioned motor, The dust storage chamber is configured to receive the suction force of the recovery device, and the dust in the dust storage chamber can be discharged to the recovery device, and the recovery device is configured to attract the dust in the dust storage chamber, The motor control unit is configured to execute a rotation suppression control that suppresses rotation of the rotating blade portion by the recovery air flow generated by the suction force of the recovery device. The vacuum cleaner according to claim 1, wherein the motor includes: a rotor connected to the rotating blade; a plurality of coils; and a motor circuit configured to supply current to the plurality of coils, The motor circuit has a plurality of switching elements that are turned on and off, The rotation suppression control includes: controlling the plurality of switching elements by the motor control unit to form a closed circuit in which the plurality of coils are electrically connected to each other, Current flows in the closed circuit due to the electromotive force generated in the plurality of coils when the rotor rotates together with the rotating blade portion, whereby the rotational energy of the rotating blade portion and the rotor is consumed from the closed circuit fever. The vacuum cleaner according to claim 1, wherein the motor includes: a rotor connected to the rotating blade; a plurality of coils; and a motor circuit configured to supply current to the plurality of coils, The motor circuit has a plurality of switching elements that are turned on and off, The rotation suppression control includes: controlling the plurality of switching elements by the motor control unit so that a current flows in at least one of the plurality of coils to generate a static magnetic field, When the rotor is at a predetermined rotational position, it is magnetically attracted by the at least one coil generating the static magnetic field. Such as the vacuum cleaner of claim 3, which further has: a battery connected to the aforementioned motor circuit; and the storage capacity detecting unit detects the storage capacity of the battery, The aforementioned vacuum cleaner is further provided with a recycling instruction unit, and the aforementioned recycling instruction unit issues an instruction of dust recovery to the aforementioned recycling device on the condition that the aforementioned storage capacity detected by the aforementioned storage capacity detection unit is higher than a predetermined threshold value, The recovery device starts suction of dust in the dust storage chamber in response to an instruction from the recovery instruction unit. The vacuum cleaner according to claim 4, wherein the motor control unit is configured to flow current from the battery to the plurality of coils on the condition that the storage capacity detected by the storage capacity detection unit is higher than the predetermined threshold. At least one coil is used to generate the aforementioned static magnetic field. The vacuum cleaner according to claim 4 or 5, wherein if the stored electricity detected by the stored electricity detection unit is not higher than the predetermined threshold value, the motor control unit controls the plurality of switching elements to form the mutual electric current of the plurality of coils. connected closed circuit, Current flows in the closed circuit due to the electromotive force generated in the plurality of coils when the rotor rotates together with the rotating blade portion, whereby the rotational energy of the rotating blade portion and the rotor is consumed from the closed circuit fever. The vacuum cleaner according to claim 4 or 5, further comprising a charging circuit configured to receive power from the recovery device when the vacuum cleaner is connected to the recovery device, and charge the power to the battery. The vacuum cleaner according to any one of claims 2 to 4, further comprising an operation part, the operation part is operated to instruct the operation of the motor, When the aforementioned operating portion is operated to instruct the operation of the aforementioned motor, the aforementioned motor control portion controls the aforementioned plurality of switching elements so as to supply current to the aforementioned plurality of coils through the aforementioned motor circuit while generating the aforementioned The rotating magnetic field in which the rotor rotates.

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