JPH02159236A - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner that automatically detects a floor surface and controls a suction motor of a vacuum cleaner body.

2. Description of the Related Art Conventionally, the user of a vacuum cleaner judges the floor surface and uses a switch at hand to adjust the amount of suction and rotation speed of the rotating brush to suit the floor surface. The details are explained in Fig. 4. 1 is a cleaning nozzle, 2 is a rotating brush, 3 is a rotating brush motor, and 4 is a cleaning nozzle.
5 is a vacuum cleaner main body, 5 is a suction motor, 6 is a suction motor control means, and 7 is a hand switch.

Problems to be Solved by the Invention However, with the above configuration, when cleaning with a vacuum cleaner, the user judges the floor surface and adjusts the suction amount and rotation speed of the rotating brush 2 according to the floor surface using the hand switch 7. There was a problem that I had to do it.

Therefore, the first object of the present invention is to provide a vacuum cleaner that can automatically detect the floor surface and obtain an appropriate suction amount and proper rotation of the rotating brush according to the floor surface.

The second object is to provide a vacuum cleaner in which the nozzle can automatically control the flow of air by bringing the nozzle into contact with the floor surface.

Means for Solving the Problems In order to achieve the above-mentioned first objective, a floor height displacement detection means for detecting a height displacement of the floor surface is provided in the cleaning nozzle, and a and a motor control means for controlling a rotary brush motor that rotates a rotary brush in response to a signal, and a suction motor control means for controlling a suction motor in response to a signal from the floor height displacement detection means. It was established in

In addition, in order to achieve the second purpose, the cleaning nozzle has a floor contact detection means for detecting whether or not the nozzle is in contact with the floor, and the suction motor is activated by a signal from the floor contact detection means. The vacuum cleaner body is provided with suction motor control means for controlling the vacuum cleaner.

Function: With the above configuration, the floor height displacement detection means provided in the cleaning nozzle automatically detects the floor height displacement, so that the suction motor of the vacuum cleaner body can be adjusted to suit the floor surface. The suction amount can be adjusted to a suitable amount, and the rotation speed of the rotating brush inside the cleaning nozzle can be adjusted to an appropriate rotation speed according to the floor surface.

Moreover, the suction motor of the cleaner body can be controlled by automatically detecting whether the nozzle is in contact with the floor surface by the floor surface contact detection means provided in the cleaning nozzle.

Example Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention, in which a cleaning nozzle 8 includes a floor height displacement detection means 9 for detecting a height displacement of the floor surface, and a rotary brush for rotating a rotary brush 10. The vacuum cleaner main body 15 includes a motor control means 12 for controlling the motor 11, and a suction motor control means 14 for controlling the suction motor 13 based on a signal from the floor height displacement detection means 9. A hand switch 16 is provided midway between the cleaning nozzle 8 and the cleaner body 15.

The floor height displacement detection means 9 includes an amplitude means 17 that is in contact with the floor surface and moves up and down depending on the height of the floor surface, an oscillation means 18 consisting of a coil, a capacitor, etc., and converts this oscillation frequency signal into a voltage signal. It consists of an F-V conversion means 19 and a comparison means 20 for determining whether this signal is a floor, tatami, or carpet.

Note that the floor height displacement detection means 9 may be of any type as long as it can detect height displacement of the floor surface (it is not limited to the configuration of the embodiment).

In the above configuration, when the power is turned on and the cleaning nozzle 8 contacts the floor surface, the amplitude means 17 that contacts the floor surface and moves up and down depending on the height of the floor surface detects the height displacement of the floor surface. This height displacement is the same as the bottom surface of the cleaning nozzle 8 in the case of a floor/tatami mat, and is below the bottom surface of the cleaning nozzle 8 in the case of a carpet. Further, when the cleaning nozzle 8 is separated from the floor surface, it is further lower than when cleaning the carpet. As a result, the oscillation means 18 consisting of a coil, a capacitor, etc. generates an oscillation frequency suitable for the type of floor surface. The F-V conversion means 19 converts this oscillation frequency signal into a voltage signal and sends the signal to the comparison means 20. The comparison means 20 compares this signal with the floor
It discriminates whether it is a tatami mat or a carpet, and sends a signal to a motor control means 12 in the cleaning nozzle 8 and a suction motor control means 14 in the cleaner body 15. This signal causes the motor control means 12
controls the rotation speed of the rotating brush 10, and the suction motor control means 14 controls the power of the suction motor 13.

As a result, the vacuum cleaner main body 15 can be adjusted to a suction amount suitable for the floor surface, and the rotating brush 10 can be adjusted to a rotation speed suitable for the floor surface.

FIG. 3 shows a second embodiment of the present invention, in which the cleaning nozzle 21 has a floor contact detection means 22 for detecting whether or not the nozzle is in contact with the floor. The vacuum cleaner main body 25 includes a suction motor control means 24 for controlling the suction motor 23 based on signals. The floor surface contact detection means 22 includes a contact rotation means 26 made of a tire or the like, and a rotation detection means 27 made of a Hall element or the like that converts the rotation of the contact rotation means 26 into an electric signal.

Note that the overall configuration of the vacuum cleaner is the same as that of the previous embodiment, and a description thereof will be omitted. Further, the floor surface contact detection means 22
The specific means for this is not limited to the configuration of this embodiment.

In the above configuration, when cleaning is performed, when the cleaning nozzle 21 touches the floor and moves forward or backward, the contact rotation means 26, such as a tire, rotates. A rotation detecting means 27 consisting of a Hall element or the like converts this rotation into an electric signal, and sends the signal to the suction motor control means 24 of the cleaner main body 25. Based on this signal, the suction motor control means 24 turns on the suction motor 23 to perform cleaning.

Moreover, when the cleaning nozzle 21 leaves the floor surface, such as when moving from room to room during cleaning or when wanting to move objects, the contact rotation means 26 stops rotating. A rotation detecting means 27 consisting of a Hall element or the like converts this rotation into an electric signal, and sends the signal to the suction motor control means 24 of the cleaner main body 25. This signal causes the suction motor control means 24 to turn off the suction motor 23, thereby stopping the suction of the vacuum cleaner.

Effects of the Invention As is clear from the above explanation, the present invention automatically detects the height displacement of the floor surface, thereby making it possible to adjust the suction amount to an appropriate amount according to the floor surface. The rotation speed of the rotating brush can be adjusted. This has the effect that the user does not have to judge the floor surface and use a hand switch to adjust the suction amount and rotation speed of the rotating brush to an appropriate amount according to the floor surface.

Further, according to the present invention, the suction motor of the cleaner main body can be controlled by automatically detecting that the floor surface contact detection means is in contact with the floor surface. Therefore, when you move the room or move objects during cleaning, the suction motor of the vacuum cleaner itself can be automatically stopped, and when you start cleaning again, the suction motor will automatically stop. The motor can be operated, and efficient cleaning and low noise effects can be expected.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing a first embodiment of the vacuum cleaner of the present invention, Fig. 2 is a circuit block diagram of the vacuum cleaner, and Fig. 3 is a circuit block diagram showing a second embodiment of the vacuum cleaner. FIG. 4 is a perspective view of a conventional vacuum cleaner. 8.21...Cleaning nozzle, 9...Floor height displacement detection means, 10...Rotating brush, 11...Rotating brush motor,
12...Motor control means, 15°25...Vacuum cleaner body,
13.23...Suction motor, 14.24...Suction motor control means, 22...Floor surface contact detection means. Name of agent: Patent attorney Shigetaka Awano and 1 other person 8 - - Cleaning Z"le 9 - Kiyoshimenbango II (fL Reichi Chizuru ro - One-time brush f-togo serious brush-bo de one-da t5- Sweeping Iso Fukyu 16° - Eleven Hands Man E Sui l Ra

Claims (2)

[Claims] (1) A floor height displacement detection means for detecting floor height displacement in the cleaning nozzle, and a motor for controlling a rotary brush motor that rotates the rotary brush based on a signal from the floor height displacement detection means. 1. A vacuum cleaner comprising: a suction motor control means in a vacuum cleaner body, the suction motor control means controlling the suction motor based on a signal from the floor surface height displacement detection means. (2) The cleaning nozzle includes a floor contact detection means for detecting whether the nozzle is in contact with the floor, and a suction motor control means for controlling the suction motor based on a signal from the floor contact detection means. A vacuum cleaner with a vacuum cleaner body.