JPS5838525A - Electromotive suction apparatus for floor - 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 The present invention relates to an electric floor suction device used in a vacuum cleaner. In the conventional electric floor suction device having a rotating brush, the load condition varies depending on the condition of the surface to be cleaned. The number of rotations of the rotating brush changes greatly in response to the change in temperature. When the load is small, for example, when the hair of the carpet is short, the rotation speed of the rotating brush is high, and when the load is large, for example, when the hair of the carpet is long, the rotation speed becomes small. Met. Therefore, the dust collection effect was significantly reduced under heavy loads.

Therefore, an object of the present invention is to provide an electric floor suction device that can improve sludge collection efficiency.

An embodiment of the present invention will be described based on FIGS. 1 to 4. In FIG. 1, in the IFi vacuum cleaner, a hose 2 is attached to the tip, an extension pipe 3 is connected to the hose 2, and the extension pipe 3 is connected to a nozzle support 9 disposed on an electric floor suction device 4. Connect to and use. As shown in FIGS. 2 and 3, the electric floor suction device has a built-in electric motor 5 in the suction device main body 4A, and a nine-rotation brush 6 attached to the suction opening is connected to the electric motor through a belt 7. 5, and the dust scraped up by a rotating brush 6 is sent to a nozzle support 9 through a passage 8. 10 is a power cord, 11 is a back plate, 12 is a floor nozzle brush, 13d is a roller, and 14 is a printed circuit board on which the main circuits of the present invention are arranged.

Next, in diagram #I4, 16 current detection resistors, 17
is a variable input circuit.

With the above configuration, when the power supply 15 is turned on and the rated input is given to the electric motor 5, the electric motor 5 operates and the rotating brush 6 rotates via the belt 7. When the electric floor suction device 4 is placed, the resistance of the surface to be cleaned increases, increasing the load.When the load is greater than the initial load input setting value, the current flowing through the current detection resistor 16 is greater than the initial current setting value. As a result, the voltage applied across the current detection resistor 16 is also large, and the input variable circuit -
17 controls the input power of the motor 5 in the direction of increasing it, and on the other hand, when the voltage applied across the current detection resistor 16 is small, the input variable circuit 17 works in the direction of decreasing the input power of the motor 5. .

Next, the variable input circuit 17 will be explained in detail. #
In Figure E4, 18 is a bidirectional thyristor, and electric motor 5. It is connected to the power supply 15 in series with the current detection resistor 16. One end of a trigger element 19 is connected to the gate of the bidirectional thyristor 18 . This trigger element 1
The other end of 9 is connected to a connection between a resistor 20 and a capacitor 21 . The other end of the resistor 20 is a bidirectional thyristor 1.
022 connected to 80T2 terminal is photocub, 7
Mo. A photoconductive element 23 and a light emitting diode 24 are mounted facing each other therein. The photoconductive element 23 is connected in series to the capacitor 21, and its resistance value is small when a large amount of light is applied to it.The light emitting diode 24 is connected in parallel to the current detection resistor 16. has been done. In this configuration, trigger element 19#i
, when the voltage of the capacitor 21 reaches the breakover voltage of the trigger element 19, a trigger signal is applied to the bidirectional thyristor 18, the bidirectional thyristor 18 becomes conductive, and current flows through the motor 5. The input power to the motor 5 is large when the trigger element 19 is triggered early, and small when the trigger element 19 is triggered late. At this trigger time, Mid capacitor 21
The larger the current charged, the faster the charge, and the smaller the current, the slower the
This charging current is smaller if the resistance of the photoconductive cable 23 connected in series with the capacitor 21 is larger, and larger if it is smaller.

Here, in the electric motor 5, when the resistance of the electric motor 5 increases and the voltage across the current detection resistor 16 increases, the amount of light from the light emitting diode 24 increases and the resistance value of the photoconductive element 23 decreases. As the resistance value becomes smaller, the charging current of the capacitor 21 becomes larger as described above, the timing of the trigger becomes earlier, and the input power to the motor 5 becomes larger. In the opposite case, it becomes smaller.〇 As described above, the electric floor suction device of the present invention includes a suction device main body, a rotating brush that is attached to the suction opening of the suction device main body and contacts the surface to be cleaned. , a motor attached to the main body of the suction device and supplied with power from an AC power source to rotate the rotating brush; a current detection circuit for detecting the current flowing through the motor; The variable input circuit controls the rotation speed of the rotary brush to a constant level in response to changes in the mechanical resistance of the surface to be cleaned to the rotary brush by increasing or decreasing input power to the motor. By reading the load received from the cleaning surface from changes in the input load and suppressing the decrease in the rotation speed of the rotating brush by increasing the input power in response to the above changes, the rotation speed of the rotating brush is kept approximately constant and the operating resistance is reduced. This has the effect of improving dust collection efficiency and dust collection function even when the mechanical resistance is large.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a vacuum cleaner to which an electric floor suction device according to an embodiment of the present invention is connected, Fig. 2 is a sectional view of the electric floor suction device, and Fig. 3 is a back plate. The bottom view in the unconscious state, FIG. 4, is also an electric circuit diagram. 5... Electric motor, 6... Rotating brush, 16... Current detection resistor, 17... Input variable circuit, ]8... Bidirectional thyristor, 19... Trigger element, 20...・Resistor, 21... Capacitor, 22... Photocoupler,
23... Photoconductive element, 24... Light emitting diode

Claims (2)

[Claims] (1) A suction device main body, a rotating brush that is attached to the suction opening of the suction device main body and comes into contact with the surface to be cleaned, and a rotary brush that is attached to the suction device main body and is powered by an AC power supply to drive the rotating brush to rotate. a current detection circuit that detects the current flowing through the motor; and a current detection circuit that detects the current flowing through the motor, and increases or decreases the input power of the motor in response to an increase or decrease in the detected current of the current detection circuit, thereby controlling the dynamics of the surface to be cleaned with respect to the rotating brush. an electric floor suction device, comprising: an input variable circuit that controls the rotational speed of the rotary brush to be constant in response to changes in resistance Q; (2) The variable input circuit includes a phase control thyristor inserted in series between the AC power source and the motor, and nine trigger elements connected to the gate of the phase control thyristor.
a charging circuit that conducts the trigger element to supply a gate current to the phase control thyristor when its own charging voltage exceeds a predetermined value; and a charging circuit that increases or decreases the amount of light in response to an increase or decrease in the detected current of the current detection circuit. and a photoconductive element that is optically coupled to the light emitting diode and changes the charging time constant of the charging circuit from small to large in response to an increase or decrease in the amount of light from the light emitting diode. Electric floor suction device 0 described in paragraph (1)