JPH02121615A - Suction instrument for motor driven floor - Google Patents

Abstract

PURPOSE:To make convenient for use by permitting a rotary brush to be switched the rotation automatically without a user's manipulation of switching according to the condition of the surface to be cleaned. CONSTITUTION:A rotary brush is pivoted in a brush compartment with a suction opening formed at the under surface, and a miniature motor 19 to drive the rotary brush to rotate is provided. Also, a pressure sensor 27 outputs a detecting output corresponding to the degree of vacuum in the brush compartment. Moreover, a comparing circuit 34 compares the detecting output of the pressure sensor 27 with two large and small reference values set previously. And, a motor control circuit 32 makes the motor 19 rotate at a slow speed or stop when the above-mentioned detecting output is larger than those two reference values by output of the comparing circuit 34, makes the motor 19 rotate at a high speed when between those two reference values and stops the motor 19 when smaller than those two reference values. That is, the rotation of the rotary brush can be switched automatically according to the condition of the surface to be cleaned to be convenient for use.

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to an electric floor suction tool for a vacuum cleaner (a) f
In an electric floor suction device in which a rotary brush is rotated by a small electric motor, the floor suction device is connected depending on whether the surface to be cleaned is a carpet surface, a floor or a folding surface. The technique of rotating the small electric motor at high or low speeds by switching the switch on the hand-operated part of the suction hose, and thereby rotating the rotating brush at high or low speeds, has been known for some time. It is very troublesome to have to switch the hand control unit depending on the surface, and if you neglect to switch the switch, the high-speed rotating brush may damage the floor or the tatami mat.

On the other hand, there are also known vacuum cleaners that detect the degree of vacuum on the suction side with a pressure sensor and automatically control the rotation speed of an electric blower based on the detection output (for example, Japanese Patent Publication No. 14613/1983, Japanese Patent Application Laid-Open No. 56/1982). -66228), but
The electric floor suction tool does not automatically control the rotation of the rotating brush depending on the condition of the cleaning surface.

(...) Problems to be Solved by the Invention This invention focuses on cleaning surfaces (carpets, floors, folding surfaces).
The rotation of the rotation plan is automatically controlled to high speed, low speed, or stop according to the lifting from the surface to be cleaned.This ensures that dust is removed from the carpet surface, and the floor and folding surface are not exposed to sunlight. The purpose of the present invention is to provide an easy-to-use electric floor suction tool whose rotating brush stops when the brush is turned off.

(D) Means for Solving the Problems In order to solve the problem E, the electric floor suction tool of the present invention pivots a rotating brush in a brush chamber whose lower surface is a suction port, and rotates the rotating brush. A pressure sensor has a small electric motor to drive and outputs a detection output according to the degree of vacuum in the brush chamber, and the detection output of the pressure sensor is compared with two preset reference values of large and small. A comparison circuit and an output of the comparison circuit cause the small electric motor to rotate at a low speed or stop when the detection output is greater than the two reference values, and to rotate the small electric motor at a high speed when it is between the two reference values. The present invention is characterized by comprising a motor control circuit that causes the small electric motor to rotate and stops the small electric motor when the rotation is smaller than the two reference values.

(,1) Effect With the above configuration, when the surface to be cleaned is the floor or folding surface, the degree of vacuum in the brush chamber becomes high and the pressure sensor outputs a large detection output, and this detection output is divided into two preset large and small Since the value is higher than the reference value, the motor control circuit causes the small motor to rotate at a low speed or stop, and the rotating brush rotates at a low speed or stops to clean the floor and folding surfaces without soaking them in hot water.

When the surface to be cleaned is a carpet surface, the vacuum level of the brush chamber is
The pressure sensor outputs a detection output that is one step lower than when it is on the folding surface, and this detection output is located between two preset reference values, so the small electric motor rotates at high speed and the rotating brush rotates at high speed. Rotate and scrape up the carpet surface to remove dust from the carpet surface while cleaning.

Furthermore, when the electric floor suction tool is lifted from the cleaning surface, the vacuum level in the brush chamber becomes very low, so the first sensor outputs a small detection output, and this detection output Since the value is smaller than the base value, the small electric motor stops, and the rotating brush stops and the rotating sound of the rotating plan disappears, making it quiet. The configuration will be explained based on FIGS. 1 to 4.

(1) is a vacuum cleaner body equipped with an electric blower (2) and a dust collection chamber (3), and (4) is a suction port (5) of the vacuum cleaner body (1).
The suction hose (4) is equipped with a handle equipped with a blower control switch (7) and a rotary brush control switch (8) at one end of a flexible hose body (6) with electrical wiring. It has a connecting pipe (9), and the connecting pipe (9)
A connecting pipe (10) having electrical wiring is detachably connected to the connecting pipe (10).

(11) connects the connecting pipe (10) to the suction hose (4);
The electric floor suction device of the present invention is connected to the floor suction device (11), and (12) is the upper case (]3).
and an upper case (14) are connected via a bumper (15) to form an oblong housing-like body case, and the front part of the main body case (12) has an oblong suction port (16) on the lower surface. ) A brush chamber (18) is formed in which a rotary brush (17) is rotatably supported, and a small electric motor (19) is installed at the rear.
A motor chamber (20) for storing the motor (20) and a board chamber (22) for storing the control circuit board (21) for controlling the motor (19) are divided into left and right, and the right side is for the rotation of the motor (19). A belt chamber (24) is formed in which 4' of belts (23) are housed for transmitting the power to the rotating brush (17), and the motor chamber (20) and the board chamber (22) are formed.
A connecting cylinder joint chamber (25) communicating with the suction port (16) is formed between the two. Further, (26) is a connecting tube for connecting the connecting tube (lO), and the connecting tube (26) is pivotally supported in the pivot chamber (25) so as to be freely rotatable in the vertical and horizontal directions. (27) is a pressure sensor attached to the control circuit board (21), and the pressure sensor (27) is connected to the partition wall (28) between the brush chamber (18) and the board chamber (22).
) into the pressure transmission hole (29) formed in the detection pipe (
27a) communicates with the brush chamber (18) to detect the degree of vacuum in the brush chamber (18) and output a detection output voltage according to the degree of vacuum. That is, if the surface to be cleaned is the floor or the When the pressure sensor (27)
outputs a large detection output voltage, and when the surface to be cleaned is a carpet, the amount of suction air is one step higher than when cleaning a floor or folded surface, and the degree of vacuum is one step lower, so outputs a one step smaller detection output voltage, Furthermore, when the electric floor suction tool (11) is lifted, the amount of suction air increases and the degree of vacuum becomes very low, so that the detected output voltage becomes very small.

Fig. 4 is a block diagram of the electric circuit of the entire vacuum cleaner including the electric floor suction device (11), and in the figure (3)) is a triac that controls the power input supplied to the small electric motor (19). The motor control element t, (31) is a motor control signal generation circuit that sends a control signal to the control element (30), and the control element (30) and the control signal generation circuit (31) control the small electric motor. (19) constitutes a motor control circuit (32) that controls the motor. Furthermore, (33) is a reference value setting part, and this setting part (33) contains the detection output voltage when the electric floor suction tool (11) is lifted and the minimum output voltage when the cleaning surface is a carpet surface. A first reference value preset between the detection output voltages, and a second reference value set between the highest detection output voltage when the cleaning surface is a carpet surface and the detection output voltage when the cleaning surface is a floor or folded surface. In other words, two large and small reference values, a first reference value and a second base $ value larger than the first half value, are set in the setting section (33). In this example, the degree of vacuum is 7.
00 mmaq, the first standard value is 800 mmaq.
The value when m1aq is set as the second reference value.

(34) is the detected output voltage of the pressure sensor (27) and the first and second values set by the reference value setting section (33).
This is a comparison circuit that compares the base $ value with two reference values, large and small, and outputs the comparison result to the motor control circuit (32). When the comparison circuit (34) outputs a comparison result that the detected output voltage is smaller than the first reference value, that is, smaller than the two reference values, the motor control circuit (32) outputs -2r. After 5 extended hours (for example, 5 seconds), reduce or stop the energization level of the electric motor D11 (3n) to operate the small "p, 'tL electric motor 19] at low speed or stop it, and increase the detection power. When the comparison result that the output voltage is between the first reference value and the second reference value, that is, between the two reference values, the motor control circuit (32) controls the motor control element (32). 32) is increased to make the small electric motor (19) rotate at high speed, and the detected output voltage is greater than the second reference value, that is, the comparison result with the dog is output from the two standards (+l). Then, the motor control circuit (32) operates to rotate the small electric motor (19) at a low speed. (35) is a DC power supply circuit on the suction device side, and (36) is a power supply line on the suction device side.

In addition, (37) is the electric blower (2) of the vacuum cleaner body (1).
This is a blower control circuit that controls the electric blower (2), and includes a blower control element (38) consisting of a triator or the like that controls the power input supplied to the electric blower (2), and the blower control switch (7).
The air blower control signal generating circuit (39) is configured to send a control signal to the control element (38) upon operation of the blower control signal generating circuit (39). (40
) is a vacuum cleaner connected to the commercial AC power supply (41) 0! The suction tool line (42) is connected in parallel to the S original wire (40) and connected to the suction tool side TL, w, line (36) via the rotary brush control switch (8). line, (43)
is the DC power supply circuit on the vacuum cleaner body side.

By purchasing item h, when the surface to be cleaned is the floor or folding surface, the degree of vacuum in the brush chamber (18) increases, and the pressure sensor (27) increases.
) is larger than the second reference value, that is, larger than the two large and small reference values, so the small electric motor (1
9) rotates at a low speed or stops, and the rotating brush (17) operates at a low speed or stops, so the floor and the folds can be cleaned without damaging them. Further, when the surface to be cleaned is a carpet surface, the degree of vacuum in the brush chamber (18) is lowered, and the detected output voltage of the pressure sensor (27) is between the first reference value and the second reference value, that is, the magnitude Since it is located between the two reference values,
The small electric motor (19) rotates at high speed, and the rotating brush (17)
The machine rotates at high speed and scrapes up the carpet surface, scraping away dust from the carpet while cleaning.

Furthermore, when the electric floor suction tool (11) is lifted from the cleaning surface, the degree of vacuum in the brush chamber (18) becomes very low, so the detected output voltage of the pressure sensor (27) is
The small electric motor (19) stops and the rotating brush (17) becomes smaller than half the value, that is, smaller than the two reference values.
The rotating brush (17) stops and the rotating sound of the rotating brush (17) disappears, making it quiet.

In this example, when the surface to be cleaned is the floor or folding surface,
Although the small electric motor (11) is operated at low speed or stopped, in another embodiment, the small electric motor (11) is operated at low speed without stopping when the rotating brush (11) is on a floor or a folding surface.
7) may be operated at low speed. In this case, a current sensor (44) is attached to the suction device power supply line (42) as shown by the dotted line in FIG. 4, and the current in the power supply line (42) is stopped. If the sensor output is input to the blower control circuit (37) when the blower control element (38) is de-energized, the electric floor suction tool (11) can be turned off when cleaning is interrupted, etc. The rotating brush (17
) stops rotating, the electric blower (2) stops rotating six times, and the operation of the vacuum cleaner body (1) also stops.

()) Effects of the Invention The electric floor suction device of the present invention is constructed as described above.
Depending on the vacuum level in the brush chamber, which changes when the surface to be cleaned is a floor, a folded surface, or a carpet, or when lifted from the surface to be cleaned, the rotating brush may be rotated at low speed or stop! The rotating brush rotates at high speed when cleaning a carpeted surface, and stops when lifting from the cleaning surface, so the rotating brush can be rotated without the user having to switch operations depending on the condition of the cleaning surface. Furthermore, it can be cleaned without damaging the floor or folding surface, and on carpet surfaces, it can reliably scrape out dust, and when it is lifted from the surface to be cleaned, the rotating sound of the rotating brush disappears, making it quiet. This has the effect of making it easier to use.

[Brief explanation of the drawing]

The drawings all relate to embodiments of the electric floor suction device of the present invention,
Fig. 1 is a partially cutaway perspective view, Fig. 2 is a partially sectional plan view with the upper case removed, Fig. 3 is an overall perspective view of the vacuum cleaner when it is connected to the main body, and Fig. 4 is the electric circuit pro/ This is a diagram. (11)...Electric floor suction device, (18) Brush room, (
27) IE sensor, (32)...motor control circuit, (34)...comparison circuit.

Claims (1)

[Claims] (1) A rotary brush is pivotally supported in a brush chamber with a suction port on the lower surface, and a small electric motor is provided to rotate the rotary brush, and outputs a detection output according to the degree of vacuum in the brush chamber. a pressure sensor; a comparison circuit that compares the detection output of the pressure sensor with two preset reference values; and an output of the comparison circuit; A motor control circuit is provided that causes the small electric motor to rotate at a low speed or stops, causes the small electric motor to rotate at a high speed when the value is between the two reference values, and stops the small electric motor when the value is smaller than the two reference values. An electric floor suction device characterized by: