JPH05253155A - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] In an electric vacuum cleaner having an electric floor suction tool, by controlling the rotary brush appropriately from the output of the floor surface sensor and the pressure sensor according to the carpet or floor,
The purpose is to improve usability and safety. [Structure] A floor surface sensor 8 in which a rotating body 9 that rotates when touching irregularities on the floor surface is provided in an electric floor suction tool 7, and a detector for detecting rotation of the rotating body 9 is provided, and a hose. A pressure sensor 13 is provided in a part of the intake passage 4 to detect the negative pressure inside the cleaner. When the change value of the pressure sensor 13 is equal to or larger than a predetermined value, and the rotating body 9 of the floor surface sensor 8 rotates a predetermined number of rotations or more in a unit time, the rotary brush 6 is once rotated by a weak rotation, and after a predetermined time, the pressure sensor 13 Based on the degree of change and the number of rotations of the rotating body 9, it is determined whether the rotating brush 6 should be rotated strongly or stopped. Even when the rotating brush 6 is stopped from strong rotation, the operation is performed at a weak rotation for a predetermined time. Therefore, usability is improved. And the safety can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner for controlling a rotary brush of an electric floor suction tool by a floor sensor for detecting a floor surface and a pressure sensor.

[0002]

2. Description of the Related Art In recent years, electric vacuum cleaners are required to automatically control a rotating brush of a floor suction tool according to the floor surface to be cleaned.

Conventionally, this type of vacuum cleaner has generally been constructed as shown in FIG. The configuration will be described below.

As shown in the figure, a cleaner body (hereinafter referred to as a body) 1 has a built-in electric blower 2 and has a hose 4, an extension pipe 5 and a rotating brush 6 at a suction port 3 for suction of an electric floor. The tool 7 is connected. Hand switches 17 and 18 are provided at the tip of the hose 4, and the hand switch 17 is operated to control the rotation speed of the electric blower 2 arranged in the main body 1. The hand switch 18 is operated to operate the electric floor. The rotary brush 6 of the suction device 7 is controlled.

[0005]

In such a conventional electric vacuum cleaner, the user determines the floor surface to be cleaned, and manually operates the hand switches 17 and 18 in accordance with the floor surface to make the main body 1 clean.
Change the suction force by changing the input (rotation speed) of
The rotating brush 6 of the electric floor suction tool 7 was turned on and off. Therefore, there is a problem that the operation is troublesome.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to appropriately control a rotary brush according to a carpet or a floor to improve usability and safety.

[0007]

In order to achieve the above object, the present invention provides a pressure sensor for detecting the pressure in an intake passage,
A floor sensor made of a rotating body that rotates when it touches the unevenness of the floor is provided, and when the change value of the pressure sensor is changing by a predetermined value or more, the rotating body of the floor sensor has a predetermined number of revolutions per unit time. After rotating more than once, rotate the rotating brush once with a weak rotation, and after a predetermined time, determine whether to rotate the rotating brush to strong rotation or stop depending on the change degree of the pressure sensor and the rotation speed of the rotating body. It is configured to have a control means for performing operation at a weak rotation for a predetermined time.

[0008]

According to the present invention, in the above-mentioned structure, the floor surface sensor distinguishes the floor quality of the cleaning surface during the operation of the vacuum cleaner. According to the information indicating whether the operation is being performed or the operation is being suspended, the rotating brush is stopped when the electric floor suction tool is raised in the air or left unattended.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 shows the construction of the floor sensor 8. As shown in the figure, in the electric floor suction tool 7, a rotating body 9 that rotates when it touches the unevenness of the floor surface is provided, and the rotating body 9 is provided with a plurality of through holes 10. A light emitting element 11 and a light receiving element 12 are arranged on both sides of 10 to detect the rotation of the rotating body 9. Further, a pressure sensor (not shown) is provided in a part of the intake passage of the hose so that the negative pressure inside the cleaner can be detected.

FIG. 2 shows a control block configuration. As shown in the drawing, a pulse is output from the light receiving element 12 according to the rotation of the rotating body of the floor surface sensor 8 and a counting means 14 for counting the pulse per unit time and a negative pressure inside the cleaner are detected. The output of the pressure sensor 13 provided in the intake passage is changed by the pressure change amount detecting means 15 which obtains the change amount within a unit time, the pressure change amount is a predetermined value or more, and the rotating body 9 of the floor sensor 8 is a unit. The rotary brush controller 16 is configured to rotate the rotary brush 6 when it has rotated a predetermined number of revolutions or more during a period of time.

The operation of the above configuration will be described. Figure 3
The characteristic of the pressure sensor 13 value when cleaning is shown in FIG. During the operation of the electric floor suction tool 7, on the rug surface, the lower surface of the electric floor suction tool 7 and the carpet come into contact with or separate from each other. Since there is little adhesion on the wooden floor and the folding surface, there is little change like B. There is almost no change like C in the air.
When left on the carpet, it looks like D, and there is almost no change in this case as well.

Since the rotating body 9 of the floor surface sensor 8 is arranged so as to rotate if it has irregularities, it rotates on the carpet surface and does not rotate on the wooden floor or folding surface. Therefore, in the rotation control of the rotary brush 6, the pressure change amount is equal to or more than a predetermined value, and
When the rotating body 9 of the floor surface sensor 8 rotates more than a predetermined number of rotations in a unit time, that is, when cleaning is performed only on the carpet surface, the rotating brush 6 is once rotated by a weak rotation. The rotating brush 6 does not rotate during cleaning on a wooden floor or a folding surface, when raised in the air, or even on a carpet surface while being left alone.

Next, a judgment is made after a lapse of a predetermined time from the start of the weak rotation, and if the change amount of the pressure sensor 13 is large and the output of the floor surface sensor 8 is more than the predetermined value, the rotation of the rotary brush 6 is made strong. If not, the rotary brush 6 is stopped. Further, when the rotation is stopped from the time of strong rotation, the rotation is weak first, and the judgment is made after a predetermined time, and if the change amount of the pressure sensor 13 is large and the output of the floor surface sensor 8 is more than the predetermined value, the rotation of the rotating brush 6 is increased. To a strong rotation, otherwise stop the rotating brush 6.

[0015]

As is apparent from the above description of the embodiments, the present invention distinguishes the floor quality of the cleaning surface from the floor surface sensor in the operation of the vacuum cleaner, the rotary brush is turned on the carpet, and the rotary brush is turned on the flat floor. It is possible to improve the usability by stopping the rotating brush and stopping the rotating brush when the electric floor suction tool is raised in the air or left unattended depending on the information whether it is in operation or interrupted by the pressure sensor. We were able to improve safety. In addition, since the rotation is once weak when the rotary brush is started and stopped, there is no sudden change in the rotation sound, which is not bothersome. Even if you accidentally touch the rotating brush with your hand when starting rotation, it is safe because of weak rotation.

[Brief description of drawings]

FIG. 1 is a perspective view of a floor sensor according to an embodiment of the present invention.

FIG. 2 is a block diagram showing control of the rotary brush.

FIG. 3 is a characteristic diagram of a pressure sensor value when the cleaning is performed.

FIG. 4 is a perspective view of a conventional vacuum cleaner.

[Explanation of symbols]

 6 Rotating brush 8 Floor sensor 9 Rotating body 13 Pressure sensor

Front page continuation (72) Inventor Akio Kato 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. An electric blower for suction, a hose, an extension pipe, and an electric floor suction tool having an electrically rotating rotary brush, and a pressure sensor for detecting the pressure in the intake passage. The pressure sensor includes a rotary body that rotates when the electric floor suction tool touches the unevenness of the floor surface, and a floor sensor that includes a detector that detects the rotation of the rotary body. When the change value is equal to or more than a predetermined value, if the rotating body of the floor surface sensor rotates more than a predetermined number of revolutions in a unit time, the rotating brush is once turned slightly, and after a predetermined time, the degree of change of the pressure sensor and the rotation of the rotating body. An electric vacuum cleaner having a control unit that determines whether the rotating brush is to be rotated strongly or stopped based on the number, and that even if the rotating brush is stopped from strong rotation, operation is performed at weak rotation for a predetermined time.