JP2011206359A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner with excellent handleability, which is capable of sufficiently suppressing useless energy consumption and efficiently performing cleaning.SOLUTION: The vacuum cleaner includes a cleaner body provided with a motor-driven blower and a control unit, a suction tool, a hose, and an extension pipe. The suction tool is provided with a rotary brush for raking up dust on a surface to be cleaned from a suction port, and an obstacle detection unit for detecting the strength of the collision of the suction tool with an obstacle. The control unit increases the rotation speed of the rotary brush to a first rotation speed until first predetermined time elapses when the strength detected by the obstacle detection unit is equal to or higher than a first reference value.

Description

  The present invention relates to a vacuum cleaner used in a general household.

  Conventionally, in this type of vacuum cleaner, a detection unit that detects that the suction tool has come into contact with the obstacle is provided in the suction tool, and the detection unit has detected that the suction tool has come into contact with the obstacle. In this case, a vacuum cleaner having a configuration for increasing the input of the electric blower has been proposed (see, for example, Patent Document 1).

  As such a conventional vacuum cleaner, for example, a vacuum cleaner having a configuration shown in FIG. 7 has been proposed.

  As shown in FIG. 7, a suction port 211 that sucks dust on the surface to be cleaned is provided on the lower surface of the suction tool 210, and a rotary brush that sweeps up dust on the surface to be cleaned in the suction port 211. 212 is provided. In addition, an opening 213 having substantially the same width as the suction port 211 is provided on the front surface of the suction tool 210, and the opening 213 is configured to be opened and closed by a closing body 214 provided on the front surface of the suction tool 210. Has been. The closing body 214 is provided above and is integrally formed with a bumper 216 made of rubber or the like. When the front portion of the bumper 216 is pushed backward by an obstacle, the closing body 214 is folded upward and upward. The opening 213 is configured to be opened. A wall surface detection switch 218 that is turned on when the front portion of the bumper 216 is pushed backward is provided in the suction tool 210.

  In such a configuration, when the user is cleaning, when the front part of the bumper 9 comes into contact with an obstacle such as a wall and is pushed backward, the closing body 214 is folded upward in the front upward direction, and the opening 213. And the wall surface detection switch 10 is turned on, and the control unit is configured to increase the input of a brush motor that drives the electric blower in the cleaner body and the rotary brush 212 in the suction tool 210.

JP-A-8-299235

  However, the conventional vacuum cleaner still has room for improvement from the viewpoint of sufficiently suppressing wasteful energy consumption.

  That is, in the conventional vacuum cleaner, the wall detection switch provided on the suction tool is pressed to detect that the suction tool has collided with the wall surface. Even if the vicinity is not intentionally cleaned, that is, if the user accidentally collides the suction tool against an obstacle such as a wall, the wall detection switch is pushed in and the brush motor The present inventors have found that the input may be increased and wasteful energy may be consumed.

  The present invention has been made in view of the above-described problems of the prior art, and provides an easy-to-use electric vacuum cleaner that can sufficiently reduce wasteful energy consumption and can be efficiently cleaned. For the purpose.

  In order to solve the above-described problems of the prior art, the present invention provides a vacuum cleaner body having an electric blower that generates suction air and a control unit that controls at least input to the electric blower, and a suction port provided on a lower surface. A suction tool for sucking dust on the surface to be cleaned, a hose with one end connected to the cleaner body, an extension pipe with one end connected to the other end of the hose and the other end connected to the suction tool; The suction tool is provided with a rotating brush that sweeps up dust on the surface to be cleaned from the suction port, and an obstacle detection unit that detects the strength with which the suction tool collides with the obstacle. If the strength detected by the obstacle detection unit is greater than or equal to the first reference value, the electric cleaning that increases the rotational speed of the rotating brush to the first rotational speed until the first predetermined time has elapsed. Provide a machine.

  Accordingly, when the strength detected by the obstacle detection unit is equal to or greater than the first reference value, the control unit sets the rotation speed of the rotating brush to the first rotation speed until the first predetermined time elapses. Therefore, when the user is cleaning the surface to be cleaned, the control unit detects the obstacle even if the suction tool is accidentally lightly collided with an obstacle such as a wall. Since the rotation speed of the rotating brush is not increased unless the strength detected by the unit is equal to or higher than the first reference value, it is possible to sufficiently suppress the consumption of wasted power.

  In addition, when the user is intentionally cleaning the vicinity of an obstacle such as a wall surface, the rotation speed of the rotary brush is increased to the first rotation speed until the first predetermined time elapses. The dust in the vicinity of the obstacle can be efficiently sucked and wasteful energy consumption can be sufficiently suppressed.

  According to the vacuum cleaner of the present invention, it is possible to provide an easy-to-use vacuum cleaner capable of sufficiently cleaning wasteful energy consumption and efficiently cleaning.

Overview of Embodiment 1 of the electric vacuum cleaner of the present invention The block diagram which shows the structure of the vacuum cleaner main body, hose, and suction tool in Embodiment 1 of the vacuum cleaner of this invention. Timing chart in Embodiment 1 of electric vacuum cleaner of this invention Timing chart in Embodiment 2 of vacuum cleaner of this invention Timing chart in Embodiment 3 of vacuum cleaner of this invention Timing chart in Embodiment 4 of vacuum cleaner of this invention Side sectional view of a conventional vacuum cleaner suction tool

  A first invention is provided with a vacuum cleaner body having an electric blower that generates draft and a control unit that controls at least input to the electric blower, and a suction port is provided on a lower surface, and dust on a surface to be cleaned is removed. A suction tool for suction, a hose with one end connected to the vacuum cleaner body, and an extension tube with one end connected to the other end of the hose and the other end connected to the suction tool. A rotating brush that sweeps up dust on the surface to be cleaned from the mouth and an obstacle detection unit that detects the strength of the suction tool colliding with the obstacle are provided, and the control unit is detected by the obstacle detection unit When the strength is equal to or greater than the first reference value, the electric vacuum cleaner is configured to increase the rotation speed of the rotary brush to the first rotation speed until the first predetermined time has elapsed.

As a result, when the user is cleaning the surface to be cleaned, even if the suction tool is inadvertently lightly collided with an obstacle such as a wall, the control unit If the detected intensity is not greater than or equal to the first reference value, the number of rotations of the rotating brush is not increased, so that wasteful power consumption can be sufficiently suppressed.

  In addition, when the user is intentionally cleaning the vicinity of an obstacle such as a wall surface, the rotation speed of the rotary brush is increased to the first rotation speed until the first predetermined time elapses. The dust in the vicinity of the obstacle can be efficiently sucked and wasteful energy consumption can be sufficiently suppressed.

  In the second invention, in particular, in the first invention, the second reference value higher than the first reference value and the second rotation number higher than the first rotation number are provided. It is.

  Thereby, it can detect more accurately that the suction tool collided with the obstruction by the obstruction detection part, and can increase the rotation speed of a rotary brush according to a user's use condition.

  According to a third aspect, in the second aspect, in particular, when the strength detected by the obstacle detection unit is equal to or greater than the second reference value, the control unit waits until the second predetermined time elapses. In this configuration, the rotational speed of the rotary brush is increased to the second rotational speed.

  Generally, when there is a lot of dust near the wall, the user may operate the suction tool by facing the wall at a faster speed than usual. The impact applied to the suction tool when the suction tool collides with an obstacle such as a wall at a higher speed than the normal speed than the impact applied to the suction tool when the suction tool collides with an obstacle such as a wall at a normal speed. growing. Therefore, the strength detected by the obstacle detection unit when the suction tool collides with an obstacle such as a wall at a faster speed than usual is also an obstacle when the suction tool collides with an obstacle such as a wall at a normal speed. It becomes larger than the strength detected by the object detection unit.

  Therefore, when the strength detected by the obstacle detection unit is equal to or greater than the second reference value, the control unit determines that the user is cleaning a place where there is a lot of dust near the wall, and the second Until the predetermined time elapses, the rotational speed of the rotary brush is increased to the second rotational speed. Thereby, the dust on the surface to be cleaned can be efficiently scraped.

  According to a fourth aspect of the present invention, in the third aspect of the invention, in particular, when the strength detected by the obstacle detection unit is equal to or greater than the second reference value, the control unit is longer than the second predetermined time. The rotational speed of the rotary brush is increased to the first rotational speed until a predetermined time of 3 elapses.

  Thereby, similarly to the third invention described above, dust on the surface to be cleaned can be efficiently scraped.

  According to a fifth aspect of the invention, particularly in the second aspect of the invention, the obstacle detection unit detects the strength with which the suction tool collides with the obstacle and the number of times the suction tool collides with the obstacle. When the strength higher than the first reference value is detected by the object detection unit, the rotation speed of the rotary brush is increased to the first rotation number, and then the strength higher than the first reference value by the obstacle detection unit. However, when a predetermined number of times is detected within the fourth predetermined time, the rotational speed of the rotating brush is increased to the second rotational speed until the fifth predetermined time elapses.

  As a result, it can be detected with higher accuracy that the user is intentionally cleaning the vicinity of an obstacle such as a wall surface.

In a sixth aspect of the invention, particularly in the fifth aspect of the invention, the control unit increases the rotational speed of the rotating brush to the first rotational speed when the obstacle detection unit detects a strength greater than or equal to the first reference value. After that, when the obstacle detection unit detects the intensity of the first reference value or more for a predetermined number of times within the fourth predetermined time, the sixth predetermined time longer than the fifth predetermined time The rotational speed of the rotating brush is increased to the first rotational speed until the time elapses.

  Thereby, like the above-mentioned 5th invention, it can detect still more precisely that the user is cleaning the neighborhood of obstacles, such as a wall, intentionally.

  In the seventh invention, particularly in the first to sixth inventions, when the strength detected by the obstacle detection unit is less than the first reference value for the seventh predetermined time or more, the rotational speed of the rotary brush is set. It is set as the structure reduced to the 3rd rotation speed.

  Thereby, useless energy consumption in the situation where the suction tool is difficult to be an obstacle can be sufficiently suppressed.

  Hereinafter, a preferred embodiment of a vacuum cleaner of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

(Embodiment 1)
Embodiment 1 of the vacuum cleaner of the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a schematic view showing Embodiment 1 of the electric vacuum cleaner of the present invention. Moreover, FIG. 2 is a block diagram which shows the structure of the cleaner main body, hose, and suction tool in Embodiment 1 of the vacuum cleaner of this invention.

  As shown in FIG. 1, the vacuum cleaner 100 mainly includes a cleaner body 1, a hose 4, an extension tube 6, and a suction tool 7 provided with a suction port (not shown) on the lower surface. Has been.

  The vacuum cleaner main body 1 is mainly disposed on the suction side of the electric blower 2 that generates suction air that sucks dust on the surface to be cleaned, and captures the dust sucked by the electric blower 2. A dust collecting unit (not shown) for collecting and a control unit 3 for controlling the input of the electric blower 2 are configured.

  A hose 4 is detachably connected to the front of the cleaner body 1. The other end of the hose 4 is provided with an operation unit 5 for selecting an operation mode in which the user operates the electric blower 2 (for example, suction force such as strong / medium / weak / stop). One end of the extension pipe 6 is detachably connected to the other end of the hose 4 where the operation portion 5 is provided. The other end of the extension pipe 6 is connected to the suction tool 7, and the suction air containing dust sucked from the suction tool 7 passes through the extension pipe 6 and the hose 4 to collect dust in the cleaning basic body 1 (see FIG. (Not shown).

  As shown in FIG. 1 and FIG. 2, inside the suction tool 7, the obstacle detection unit 8 for detecting that the suction tool 7 collides with an obstacle such as a wall, and the dust on the surface to be cleaned are scraped. A rotating brush 9 to be raised is provided. The rotary brush 9 is disposed so as to face a suction port (not shown) provided on the lower surface of the suction tool 7.

  The obstacle detection unit 8 is generally composed of molded electronic parts, and is configured such that dust does not enter the obstacle detection unit 8. Moreover, as an arrangement place of the obstacle detection part 8, it is arrange | positioned in the center part ahead of the suction tool 7, and the place isolated from the ventilation path through which the dust attracted | sucked from the to-be-cleaned surface passes.

As a result, it is possible to prevent the obstacle detection unit 8 from being directly covered with dust.
Even when used for a long time, the obstacle detection unit 8 can be operated normally. Further, by applying a protective material such as potting to the surface of the electronic component that constitutes the obstacle detection unit 8, dust is directly applied to the obstacle detection unit 8, and the obstacle detection unit 8 does not operate normally. Further, it can be sufficiently suppressed.

  As shown in FIG. 2, the control unit 3 operates each operation mode based on a signal of an operation mode (for example, suction force such as strong / medium / weak / stop) for operating the electric blower 2 arbitrarily selected by the user. The rotational speed of the rotary brush 9 is controlled so that the rotational speed corresponds to.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Normally, when the user cleans the surface to be cleaned, the user operates the suction tool 7 back and forth to suck the dust on the surface to be cleaned with the suction tool 7. At this time, the suction tool 7 may collide with an obstacle such as a wall or a desk leg. When the suction tool 7 collides with an obstacle, an impact is applied to the suction tool 7 and at the same time, an impact is also applied to the obstacle detection unit 8 provided inside the suction tool 7.

  When an impact is applied to the obstacle detection unit 8, pressure is applied to the piezoelectric ceramic inside the obstacle detection unit 8 and electric charges are generated. This amount of charge is generated in proportion to the magnitude of the impact applied to the obstacle detection unit 8. This charge amount is converted into a voltage and amplified in the obstacle detection unit 8, and then transmitted to the control unit 3 as a signal from the obstacle detection unit 8. The control unit 3 determines the magnitude of the impact applied to the obstacle detection unit 8 based on the signal from the obstacle detection unit 8 and determines whether the suction tool 7 has collided with the obstacle. And when the control part 3 judges that the suction tool 7 collided with the obstruction, it performs control which increases the rotation speed of the rotating brush 9. FIG.

  The control operation in the control unit 3 will be described below with reference to FIG.

  FIG. 3 is a timing chart in the first embodiment of the electric vacuum cleaner of the present invention. Here, “standard” in FIG. 3 is the number of rotations of the rotating brush 9 corresponding to the input of the electric blower 2 that is arbitrarily selected by the user through the operation unit 5.

  The control unit 3 stores in advance a voltage value A that is a first reference value for determining that the suction tool 7 has collided with an obstacle, and the control unit 3 receives the signal from the obstacle detection unit 8. Based on the signal and the voltage value A, it is determined whether or not the suction tool 7 has collided with an obstacle.

  When the momentum when the suction tool 7 collides with the obstacle is small, that is, when the signal from the obstacle detection unit 8 is smaller than the voltage value A, the control unit 3 indicates that the suction tool 7 does not collide with the obstacle. It judges and performs control which maintains the rotation speed of the rotary brush 9 corresponding to the input of the electric blower 2 selected by the user.

  When the momentum when the suction tool 7 collides with the obstacle is large, that is, when the signal from the obstacle detection unit 8 is equal to or higher than the voltage value A, the control unit 3 determines that the suction tool 7 has collided with the obstacle, A first rotational speed (“rotational speed” in FIG. 4) that is higher than the rotational speed of the rotating brush 9 (“standard” in FIG. 4) corresponding to the input of the electric blower 2 selected by the user. 1)), the control to increase the rotation speed of the rotary brush 9 is performed.

  The time for increasing the number of rotations of the rotating brush 9 is a first predetermined time from time T0 when the signal from the obstacle detection unit 8 becomes equal to or higher than the voltage value A to a predetermined end time T1. After the first predetermined time has elapsed, the control unit 3 controls the rotational speed of the rotary brush 9 so as to return to the rotational speed corresponding to the input of the electric blower 2 selected by the user.

  Here, the “first reference value”, “first rotational speed”, and “first predetermined time” are the gender, age, arm strength, type of surface to be cleaned, and dust on the surface to be cleaned. It is determined by the amount, the driving method of the rotating brush, and the like, and may be obtained and set in advance by any of experiments, simulations, and monitors in consideration of these.

  Signal transmission from the obstacle detection unit 8 to the control unit 3 and control of the number of rotations of the rotary brush 9 by the control unit 3 are performed according to the block diagram shown in FIG.

  Further, as a method for controlling the number of rotations of the rotary brush 9, when a drive unit such as a motor for driving the rotary brush 9 is provided in the suction tool 7 and the rotary brush 9 is driven to rotate by this drive unit, the control unit 3. Increases the number of rotations of the rotating brush 9 by increasing the input to the drive unit. In addition, when the rotary brush 9 is rotationally driven by the suction air of the electric blower 2 without providing a drive unit such as a motor for driving the rotary brush 9 in the suction tool 7, the input of the electric blower 2 is increased. The rotational speed of the rotary brush 9 is increased.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIG. Note that a description of the same components as those in the first embodiment described above is omitted.

  FIG. 4 is a timing chart in the second embodiment of the electric vacuum cleaner of the present invention. Here, “standard” in FIG. 4 is the number of rotations of the rotating brush 9 corresponding to the input of the electric blower 2 that is arbitrarily selected by the user through the operation unit 5.

  The vacuum cleaner according to the second embodiment differs from the vacuum cleaner according to the first embodiment in the following points.

  When there is a lot of dust on the wall, the user may operate the suction tool 7 facing the wall at a faster speed than usual. When the suction tool 7 collides with an obstacle such as a wall at a higher speed than usual, the impact applied to the suction tool 7 is applied to the suction tool 7 when the suction tool 7 collides with an obstacle such as a wall at a normal speed. Since it becomes larger than the applied impact, the signal sent from the obstacle detection unit 8 to the control unit 3 also increases.

  Therefore, the control unit 3 has a voltage value A that is a first reference value for determining that the suction tool 7 has collided with an obstacle, and a second reference value that is higher than the first reference value. The voltage value B is stored in advance, and the control unit 3 determines whether the suction tool 7 has collided with the obstacle based on the signal from the obstacle detection unit 8, the voltage value A, and the voltage value B. It is configured as follows.

  When the signal from the obstacle detection unit 8 is smaller than the voltage value A, the control unit 3 determines that the suction tool 7 has not collided with the obstacle, and inputs the electric blower 2 selected by the user. Control is performed to maintain the rotation speed of the corresponding rotary brush 9.

  Further, the control unit 3 determines that the control unit 3 has collided with the obstacle at a normal speed when the signal from the obstacle detection unit 8 is not less than the voltage value A and less than the voltage value B. The rotational speed of the rotating brush 9 corresponding to the input of the electric blower 2 selected by the user ("standard" in FIG. 4) is higher than the "rotational speed 1" in FIG. Control to increase the number of rotations of the rotating brush 9 is performed.

Furthermore, when the signal from the obstacle detection unit 8 is equal to or higher than the voltage value B, the control unit 3 determines that the suction tool 7 has collided with the obstacle at a faster speed than usual, and the user A second rotational speed (in FIG. 4) that is higher than the rotational speed 1 from the rotational speed of the rotating brush 9 ("standard" in FIG. 4) corresponding to the input of the selected electric blower 2 “Rotation speed 2”) is controlled to increase the rotation speed of the rotary brush 9. Thereby, the dust on the surface to be cleaned can be strongly scraped, and the dust on the surface to be cleaned can be efficiently scraped.

  The time for increasing the rotation speed of the rotary brush 9 to “rotation speed 2” is the second time from the time T0 when the signal from the obstacle detection unit 8 becomes equal to or higher than the voltage value A to the predetermined end time T2. It is a predetermined time. The end time T2 of the second predetermined time may be the same as the end time T1 in the first embodiment described above, and is different from the first end time T1 in the first embodiment described above. It may be. After the second predetermined time has elapsed, the control unit 3 controls the rotation speed of the rotary brush 9 so as to return to the rotation speed corresponding to the input of the electric blower 2 selected by the user.

  Here, the “second reference value”, “second rotational speed”, and “second predetermined time” are the above-mentioned “first reference value”, “first rotational speed”, and “second rotational speed”. In the same way as “1 predetermined time”, it is determined by the gender, age, arm strength, type of surface to be cleaned, amount of dust on the surface to be cleaned, driving method of the rotating brush, etc. Alternatively, it may be obtained and set in advance by any one of experiment, simulation, and monitor.

  In the present embodiment, when the signal from the obstacle detection unit 8 is equal to or higher than the voltage value B, the control unit 3 sets the number of rotations of the rotary brush 9 to be higher than “number of rotations 1” (FIG. 5). However, it is also possible to increase the time during which the rotation speed of the rotary brush 9 is set to “rotation number 1”.

  When the signal from the obstacle detection unit 8 is equal to or higher than the voltage value B, the control unit 3 ends so that the time for increasing the rotation speed of the rotary brush 9 to “rotation speed 1” is longer than the second predetermined time. A time T2 is set, and during the third predetermined time from the start time T0 to the end time T2, control is performed to increase the rotation speed of the rotary brush 9 to “rotation speed 1”. As a result, the dust on the surface to be cleaned can be strongly scraped off as in the case where control is performed to increase the rotational speed of the rotary brush 9 to “rotational speed 2” higher than “rotational speed 1”. Dust on the cleaning surface can be efficiently scraped.

  The “third predetermined time” is determined by the user's sex, age, arm strength, type of surface to be cleaned, amount of dust on the surface to be cleaned, driving method of the rotating brush, and the like. Alternatively, it may be obtained and set in advance by any one of experiment, simulation, and monitor.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIG. Note that a description of the same components as those in the first and second embodiments is omitted.

  FIG. 5 is a timing chart in the third embodiment of the electric vacuum cleaner of the present invention. Here, “standard” in FIG. 5 is the number of rotations of the rotary brush 9 corresponding to the input of the electric blower 2 that is arbitrarily selected by the user through the operation unit 5.

  The vacuum cleaner according to Embodiment 3 differs from the vacuum cleaner according to Embodiment 1 and Embodiment 2 in the following points.

  When the signal from the obstacle detection unit 8 becomes the voltage value A or more a plurality of times within the fourth predetermined time, it is considered that the user is carefully cleaning the wall.

Therefore, in the present embodiment, the control unit 3 measures the number of times a signal greater than the voltage value A is detected again within a predetermined time from when the signal greater than the voltage value A is detected, When the number of times becomes a predetermined number or more, control is performed so as to increase the number of rotations of the rotary brush 9.

  For example, as shown in FIG. 5, after a signal having a voltage value A or more is detected three times and a signal having a voltage value A or more is detected for the first time, the voltage value A is more than once within a fourth predetermined time. A configuration for increasing the rotation speed of the rotary brush 9 when the above signals are detected will be described.

  The control unit 3 counts the number of times that the signal from the obstacle detection unit 8 becomes equal to or higher than the voltage value A during a fourth predetermined time (from T3 to T6 in FIG. 5). Then, after detecting the signal P1 of the first voltage value A or more, the control unit 3 receives the signal of the second voltage value A or more within the first fixed time (from T3 to T4 in FIG. 5). If not detected, the rotational speed of the rotary brush 9 is adjusted so as to return to the rotational speed corresponding to the input of the electric blower 2 selected by the user after a predetermined time has passed, as in the first embodiment described above. Control.

  Further, after determining that the suction tool 7 has collided with the obstacle, the control unit 3 detects the signal P2 of the second voltage value A or more within the first predetermined time (from T3 to T4 in FIG. 5). If so, control is performed so that the rotational speed of the rotary brush 9 is maintained at “rotational speed 1”.

  Further, the control unit 3 detects the signal P3 having the voltage value A greater than or equal to the third time within a second predetermined time (from T5 to T6 in FIG. 5) after the signal P2 having the voltage value A or more detected for the second time is detected. If the motor is not detected, the rotational speed of the rotary brush 9 is returned to the rotational speed corresponding to the input of the electric blower 2 selected by the user after a predetermined time has elapsed, as in the first embodiment. To control.

  Further, the control unit 3 detects the signal P3 of the third voltage value A or more within a second fixed time (from T5 to T6 in FIG. 5) after the signal P2 of the second voltage value A or more is detected. Is detected, during the fifth predetermined time (from T7 to T8 in FIG. 5), the rotation speed of the rotary brush 9 is “rotation number 1” to “rotation number 1” which is higher than “rotation number 1”. The number of rotations of the rotating brush 9 is controlled so as to be increased to “number 2”. After the fifth predetermined time has elapsed, the control unit 3 controls the rotation speed of the rotary brush 9 so as to return to the rotation speed corresponding to the input of the electric blower 2 selected by the user. Thereby, the dust on the surface to be cleaned can be strongly scraped, and the dust on the surface to be cleaned can be efficiently scraped.

  Here, the “fourth predetermined time” is based on the time required for the user to reciprocate the suction tool 7 during cleaning and a predetermined number of times set in advance. If the time for reciprocating 7 is 1 second, the fourth predetermined time is 1 second. In addition, if the predetermined number of times is 3 times and the time for the user to reciprocate the suction tool 7 is 1 second, the fourth predetermined time is 3 seconds.

  The “fourth predetermined time”, “predetermined number of times”, and “fifth predetermined time” are determined by the gender, age, strength of the user, the type of surface to be cleaned, the amount of dust on the surface to be cleaned, and the like. Therefore, in consideration of these, it may be obtained and set in advance by any of experiments, simulations, and monitors.

Here, in the present embodiment, the control unit 3 detects the signal greater than or equal to the voltage value A three times, detects the signal greater than or equal to the first voltage value A, and then detects the signal within the fourth predetermined time. The description has been given of the configuration in which the number of rotations of the rotary brush 9 is increased when a signal of the voltage value A of the third time or more is detected when the signal of the voltage value A or more of the times is detected. The rotation speed of the rotary brush 9 may be increased when a signal of the second voltage value A or higher is detected, and the rotation speed of the rotary brush 9 may be increased when a signal of the second voltage value A or higher is detected. Whether to increase the above-mentioned experiment,
What is necessary is just to obtain | require and set beforehand by either of simulation and a monitor.

  Further, the rotational speed of the rotary brush 9 is set to be higher than “rotational speed 2”, and the control unit 3 detects the rotational speed of the rotary brush 9 when the signal P1 equal to or higher than the first voltage value A is detected. Is increased to “rotational speed 1”, and after the signal P1 of the first voltage value A or more is detected, the signal P2 of the second voltage value A or more is detected within the fourth predetermined time. The number of rotations of the rotary brush 9 is increased from “number of rotations 1” to “number of rotations 2”, and after the signal P1 of the second voltage value A or more is detected, the third time within the fourth predetermined time. When a signal having a voltage value A or higher is detected, the rotational speed of the rotary brush 9 may be increased from “rotational speed 2” to a rotational speed higher than “rotational speed 2”.

  In the present embodiment, the control unit 3 increases the number of rotations of the rotating brush 9 to “the number of rotations 1” when the signal P1 of the first voltage value A or more is detected, and thereafter The description has been given of the configuration in which the rotation speed of the rotary brush 9 is increased from “rotation speed 1” to “rotation speed 2” when the signal P3 of the third voltage value A or more is detected within a predetermined time of 4. When the signal P1 equal to or higher than the first voltage value A is detected, the control unit 3 increases the number of rotations of the rotary brush 9 to “number of rotations 1”, and then the third time within the fourth predetermined time. When the signal P3 of the voltage value A or more is detected, the rotation speed of the rotary brush 9 is not increased to “rotation speed 2”, but the time for which the rotation speed of the rotary brush 9 is set to “rotation speed 1” is increased. May be.

  When the signal P1 equal to or higher than the first voltage value A is detected, the control unit 3 increases the number of rotations of the rotary brush 9 to “number of rotations 1”, and then the third time within the fourth predetermined time. When the signal P3 having the voltage value A or more is detected, the end time T8 is set so that the time for increasing the number of rotations of the rotary brush 9 to “number of rotations 1” is longer than the fifth predetermined time. During the sixth predetermined time from the time T0 to the end time T8, control is performed to increase the rotation speed of the rotary brush 9 to “rotation speed 1”. As a result, the dust on the surface to be cleaned can be strongly scraped off as in the case where control is performed to increase the rotational speed of the rotary brush 9 to “rotational speed 2” higher than “rotational speed 1”. Dust on the cleaning surface can be efficiently scraped.

  The “sixth predetermined time” is determined by the user's sex, age, arm strength, type of surface to be cleaned, amount of dust on the surface to be cleaned, driving method of the rotating brush, etc. Alternatively, it may be obtained and set in advance by any one of experiment, simulation, and monitor.

(Embodiment 4)
A third embodiment of the present invention will be described with reference to FIG. Note that a description of the same components as those in the first and second embodiments is omitted.

  FIG. 6 is a timing chart in the fourth embodiment of the vacuum cleaner of the present invention. Here, “standard” in FIG. 6 is the number of rotations of the rotating brush 9 corresponding to the input of the electric blower 2 arbitrarily selected by the user through the operation unit 5.

  The vacuum cleaner according to the fourth embodiment is different from the vacuum cleaners according to the first embodiment, the second embodiment, and the third embodiment in the following points.

  When the control unit 3 does not receive a signal from the obstacle detection unit 8 for a seventh predetermined time (from T9 to T10 in FIG. 6), the suction device 7 is unlikely to be an obstacle, that is, the user has a wall or the like. It is thought that the vicinity of the obstacle was not cleaned. Compared to the vicinity of obstacles such as walls, it is relatively difficult to collect dust on the surface to be cleaned without obstacles, and there is little dust, so even if the number of rotations of the rotating brush 9 is low, sufficient cleaning is performed. Can do.

  Therefore, when the signal from the obstacle detection unit 8 is not detected for a seventh predetermined time (from T9 to T10 in FIG. 6) or more, the control unit 3 cleans the surface to be cleaned with less dust. It is judged that the number of revolutions of the rotating brush 9 corresponding to the input of the electric blower 2 selected by the user ("standard" in FIG. 6) is lower ("number of revolutions 3" in FIG. 6) Then, control is performed to reduce the rotational speed of the rotary brush 9. Thereby, useless energy consumption in the situation where the suction tool 7 is difficult to be an obstacle can be sufficiently suppressed.

  The “third rotation speed” and the “seventh predetermined time” are determined by the gender, age, arm strength, type of surface to be cleaned, amount of dust on the surface to be cleaned, driving method of the rotating brush, and the like. Therefore, in consideration of these, it may be obtained and set in advance by any of experiments, simulations, and monitors.

  As described above, the vacuum cleaner according to the present invention determines the type of the obstacle when the suction tool collides with the obstacle, and performs control according to the situation. It is also useful to develop applications for commercial vacuum cleaners.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 3 Control part 4 Hose 5 Operation part 6 Extension pipe 7 Suction tool 8 Obstacle detection part 9 Rotating brush

Claims (7)

A vacuum cleaner body having an electric blower that generates suction air and a control unit that controls at least input to the electric blower;
A suction port is provided on the lower surface, and a suction tool for sucking dust on the surface to be cleaned;
A hose with one end connected to the vacuum cleaner body;
One end is connected to the other end of the hose, and the other end is connected to the suction tool.
The suction tool is provided with a rotating brush that sweeps up dust on the surface to be cleaned from the suction port, and an obstacle detection unit that detects the strength with which the suction tool collides with an obstacle,
When the strength detected by the obstacle detection unit is equal to or greater than a first reference value, the control unit sets the rotation speed of the rotary brush to a first rotation until a first predetermined time elapses. Vacuum cleaner to increase the number.   The vacuum cleaner according to claim 1, wherein a second reference value higher than the first reference value and a second rotation number higher than the first rotation number are provided.   When the strength detected by the obstacle detection unit is equal to or higher than the second reference value, the control unit sets the rotation speed of the rotary brush until the second predetermined time elapses. The vacuum cleaner according to claim 2, wherein the number of rotations is increased to two.   When the strength detected by the obstacle detection unit is greater than or equal to the second reference value, the control unit waits until a third predetermined time longer than the second predetermined time elapses. The vacuum cleaner according to claim 3, wherein the rotation number of the rotating brush is increased to the first rotation number. The obstacle detection unit detects the strength with which the suction tool collides with the obstacle, and the number of times the suction tool collides with the obstacle,
The controller increases the rotation speed of the rotating brush to a first rotation speed when the obstacle detection unit detects the strength equal to or greater than the first reference value, and then detects the obstacle. When the strength greater than or equal to the first reference value is detected more than a predetermined number of times within a fourth predetermined time, the rotational speed of the rotating brush is increased until a fifth predetermined time elapses. The vacuum cleaner according to claim 2, wherein the number of rotations is increased to two.   The controller increases the rotation speed of the rotating brush to a first rotation speed when the obstacle detection unit detects the strength equal to or greater than the first reference value, and then detects the obstacle. A sixth predetermined time that is longer than the fifth predetermined time elapses when the strength greater than or equal to the first reference value is detected a predetermined number of times within the fourth predetermined time by the unit. The vacuum cleaner according to claim 5, wherein the rotational speed of the rotating brush is increased to the first rotational speed.   When the strength detected by the obstacle detection unit is less than the first reference value for a seventh predetermined time or more, the control unit sets the number of rotations of the rotating brush to a third number of rotations. The vacuum cleaner according to any one of claims 1 to 6, which is reduced.