JP2012055462A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner superior in durability as well as in energy saving.SOLUTION: The vacuum cleaner includes: an electric blower for generating a suction air; a suction tool communicated with the electric blower to suck in dust on the floor from a dust suction port; an electric nozzle brush provided in the suction tool to scrape upward the dust; an acceleration sensor provided near the suction tool to detect a vibration of the suction tool; a control part for controlling the speeds of the electric blower and electric nozzle brush and determining whether or not the suction tool is in touch with the floor surface based on a signal from the acceleration sensor, thereby to control the rotation of the electric nozzle brush.

Description

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

  Conventionally, turning on and off of the electric nozzle brush provided in the suction tool of this type of vacuum cleaner has been switched by a mechanical switch (see, for example, Patent Document 1).

JP 2008-220520 A

  However, in the above configuration, because the mechanism parts are used to detect leaving and landing, the switch may fail if the switch is turned on and off many times, and dust adheres to the switch. In some cases, it was inconvenient because the user had to clean. This invention solves the said subject, and it aims at providing the vacuum cleaner excellent in durability and easy to use.

  In order to solve the above-described conventional problems, the present invention includes an electric blower that generates suction air, a suction tool that communicates with the electric blower and sucks dust on the floor surface from a dust suction port, and is provided in the suction tool. An electric nozzle brush that sweeps up dust on the floor, an acceleration sensor that is provided in the vicinity of the suction tool and detects vibration received by the suction tool, controls the rotational speed of the electric blower and the electric nozzle brush, and A vacuum cleaner provided with a control unit for judging whether the suction tool is landed on the floor surface or leaving the floor based on a signal from the sensor, without using mechanical parts, using an acceleration sensor The suction level of the suction tool can be judged from the signal level, and the rotation of the electric nozzle brush can be automatically controlled. Therefore, it is possible to provide a vacuum cleaner having excellent durability and ease of use.

  The vacuum cleaner of the present invention can automatically control the number of rotations of the electric nozzle brush by judging the floor of the suction tool from the signal of the acceleration sensor.

Whole view of the electric vacuum cleaner which shows Embodiment 1 of this invention Circuit diagram of the vacuum cleaner Signal waveform diagram of acceleration sensor of the vacuum cleaner

  A first aspect of the present invention is an electric blower that generates suction air, a suction tool that communicates with the electric blower and sucks floor dust from a dust suction port, and an electric motor that lifts floor dust provided in the suction tool. A nozzle brush, an acceleration sensor that is provided in the vicinity of the suction tool and detects vibrations received by the suction tool, controls the rotational speed of the electric blower and the electric nozzle brush, and based on a signal from the acceleration sensor The vacuum cleaner provided with the control part which judges whether the said suction tool is landing on the floor surface, or leaving the floor, and can determine the removal / desorption floor of a suction tool, without using a mechanical component.

  According to a second aspect of the present invention, when the signal level for a predetermined time from the acceleration sensor is equal to or lower than a first predetermined value, it is determined that the person is getting out of bed, and when the signal level exceeds the first predetermined value, it is determined that the user is landing. Therefore, it is possible to determine the release / removal floor of the suction tool without using mechanical parts.

  The third aspect of the invention is characterized in that the rotation of the electric nozzle brush is stopped when it is determined that the suction tool has left the floor, and the fourth aspect of the invention is that when the suction tool is determined to land, The nozzle brush is rotated, and the rotation of the electric nozzle brush can be controlled.

  According to a fifth aspect of the present invention, when the signal level from the acceleration sensor for a certain time is equal to or lower than a second predetermined value and equal to or higher than the first predetermined value, the rotational speed of the electric nozzle brush is increased as compared with the normal time. The number of rotations of the electric nozzle brush can be controlled in accordance with the floor surface state.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an overall view of the electric vacuum cleaner according to the first embodiment. The vacuum cleaner main body 1 has an electric blower 2 built in at the rear, a dust collection chamber 3 for collecting dust is disposed at the front, and a hose 4 is provided at the front of the vacuum cleaner main body 1. The other end of the hose 4 is provided with an operation unit 5 that is held by a user and operated to operate the cleaner body 1. The extendable extension tube 6 is connected to the hose 4 and the other end is detachably connected to a suction tool 7 for sucking dust on the floor surface.

  An electric nozzle brush 8 that scrapes off dust on the floor surface by an electric motor is disposed on the suction tool 7, and an acceleration sensor 10 that detects vibration of the floor surface is disposed above the suction tool 7. At the rear of the cleaner body 1, a power cord plug 12 is provided to connect to an outlet (commercial power supply) and supply power to the circuit board 11 built in the cleaner body 1.

  FIG. 2 is a circuit configuration diagram of the vacuum cleaner in the present embodiment. The circuit board 11 is connected to the electric blower 2, the electric nozzle brush 8, the acceleration sensor 10, and the power cord plug 12, and has a control unit 13 composed of a microprocessor in accordance with a signal input from the acceleration sensor 10. The rotational speed control of the electric blower 2 and the electric nozzle brush 8 is performed.

  Further, the control unit 13 also includes an arrival / departure floor determination threshold value 14 and a floor surface condition determination threshold value 15 for determining that the input signal level that changes according to the acceleration at which the acceleration sensor 10 moves exceeds a certain value during a certain time. Have.

FIG. 3 is a diagram showing a signal waveform from the acceleration sensor 10 received by the control unit 13 in the present embodiment.
The operation of the above configuration will be described with reference to FIGS.
When the user performs cleaning, when the user operates the operation unit 5, the control unit 13 operates the electric blower 2 and the electric nozzle brush 8, and dust on the floor surface lifted up by the electric nozzle brush 8 is removed. This is performed by sending the dust into the dust collection chamber 3 by the suction air generated by the electric blower 2.

The signal from the acceleration sensor 10 detected by the control unit 13 at this time is as shown in a of FIG. 3 by the vibration that the acceleration sensor 10 receives from the floor surface. Next, when the user lifts the suction tool 7, the acceleration sensor 10 does not receive vibration from the floor surface, so that the state is as shown in FIG. At this time, the control unit 13 determines that the suction tool 7 has left the floor because the signal level of the acceleration sensor 10 is lower than the release floor determination threshold value 14, and stops the operation of the electric nozzle brush 8.

  With the above operation, the vacuum cleaner of the present invention can switch the rotation of the electric nozzle brush 8 without using mechanical parts, so that it is possible to avoid wasting energy when the electric nozzle brush 8 is in the air, and A vacuum cleaner with excellent durability can be provided.

  Further, when the user puts the suction tool 7 on the floor again and performs cleaning, the acceleration sensor 10 receives vibration from the floor surface again, and the signal received from the acceleration sensor 10 by the control unit 13 is a landing / departure determination threshold value. 14, the control unit 13 determines that the suction tool 7 has landed and operates the electric nozzle brush 8 again.

  In addition, when the signal level received from the acceleration sensor 10 by the control unit 13 is lower than the floor surface state determination threshold 15 and higher than the separation / departure floor determination threshold 14 as shown in FIG. It can be judged that it is in a state where it is difficult to remove dust because the floor of the house is cleaned. Therefore, when the signal level received from the acceleration sensor 10 is lower than the floor surface state determination threshold 15 and higher than the separation / departure floor determination threshold 14, the control unit 13 increases the number of rotations of the electric nozzle brush 8 by This makes it possible to increase the dust collection efficiency even in places where it is difficult to collect garbage such as carpets, and to provide a user-friendly vacuum cleaner to the user.

  As described above, since the vacuum cleaner according to the present invention can detect floor leaving without using mechanical parts by the acceleration sensor, it is possible to provide a vacuum cleaner with higher durability, Especially useful for all vacuum cleaners.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 7 Suction tool 8 Electric nozzle brush 10 Acceleration sensor 13 Control part 14 Detached floor judgment threshold 15 Floor surface state judgment threshold

Claims (5)

An electric blower that generates suction air, a suction tool that communicates with the electric blower and sucks dust on the floor surface from a dust suction port, an electric nozzle brush that is provided in the suction tool and sweeps up dust on the floor surface, and the suction tool An acceleration sensor that detects vibration received by the suction tool, and controls the rotational speed of the electric blower and the electric nozzle brush, and the suction tool is landed on the floor based on a signal from the acceleration sensor A vacuum cleaner provided with a control unit that determines whether the person is getting out of bed. 2. The method according to claim 1, wherein when the signal level from the acceleration sensor for a predetermined time is equal to or lower than a first predetermined value, it is determined that the user is getting out of bed, and when the signal level exceeds the first predetermined value, it is determined that the user is landing. Electric vacuum cleaner. The electric vacuum cleaner according to claim 2, wherein when it is determined that the suction tool has left the floor, rotation of the electric nozzle brush is stopped. The electric vacuum cleaner according to claim 2 or 3, wherein when the landing of the suction tool is determined, the electric nozzle brush is rotated. The number of revolutions of the electric nozzle brush is increased as compared with the normal time when the signal level from the acceleration sensor for a predetermined time is equal to or lower than a second predetermined value and equal to or higher than the first predetermined value. The electric vacuum cleaner according to 2.

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