JPH06254017A - Controller for vacuum cleaner - Google Patents

Abstract

PURPOSE:To improve the dust collection performance and the operability by detecting the operating direction of a bottom nozzle by a nozzle forward/ backward direction detecting sensor provided in a motor-driven bottom nozzle and controlling the rotational direction, etc., of a rotary brush. CONSTITUTION:A motor-driven bottom nozzle is provided with a forward/ backward rotational direction control means consisting of a bottom nozzle forward/backward direction detecting sensor constituted of a coil 9, a magnet 10, springs 11, 12, etc., and a switching element for switching the rotational direction of a rotary brush of the motor-driven bottom nozzle, constituted so as to detect the operating direction of the nozzle by detecting the voltage polarity generated across the coil 9 of the bottom nozzle forward/backward direction detection sensor, and constituted so as to control the rotational direction of the rotary brush.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an electric floor nozzle of an electric vacuum cleaner. The electric power consumption of the electric blower and the rotating brush of the electric floor suction tool depend on the operation direction and the operation speed of the floor nozzle. The present invention relates to an electric vacuum cleaner that controls the number of rotations of the electric vacuum cleaner.

[0002]

2. Description of the Related Art In recent years, the suction performance of electric vacuum cleaners has been dramatically improved, but conversely, the deterioration of operability due to adsorption between the floor surface and the nozzle has become a problem.

Conventionally, this type of vacuum cleaner generally has a structure 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 suction port 3 having a hose 4, an extension tube 5 and a rotating brush 6 for electric floor suction. The tool 36 is connected. A hand switch 7 is provided at the tip of the hose 4, and the rotation speed of the electric blower 2 arranged in the main body 1 is controlled by operating the hand switch 7.

In such a conventional electric vacuum cleaner, the rotation direction of the rotary brush is always constant, and the scraping effect is low and the dust collecting performance is low. Further, when the suction performance is improved, there is a problem that the suction force between the floor nozzle and the floor surface is increased and the operability is deteriorated.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a nozzle front-rear direction detection sensor provided in an electric floor nozzle detects the operation direction of the floor nozzle to rotate the rotary brush. The purpose is to control the direction and improve the dust collection performance and operability.

[0007]

In order to achieve the above object, the present invention is configured as follows.

(1) Coil provided on the electric floor nozzle
It has a forward / reverse rotation direction control means consisting of a floor nozzle front-back direction detection sensor composed of a magnet, a spring, etc. and a switching element for switching the rotation direction of the rotating brush of the electric floor nozzle, and the floor nozzle front-back direction detection sensor, A coil is wound multiple times in a hollow case, magnets are installed in the hollow case, and both ends are supported by elastic bodies such as springs so that the hollow case is slidable and the sliding direction is a nozzle. It is configured to detect the operating direction of the nozzle by detecting the polarity of the voltage generated at both ends of the coil by mounting the rotating brush in the same direction as the front-back direction of the coil. It is configured to control.

(2) A coil bobbin in which a coil is wound a plurality of times in a hollow case, a magnet installed slidably in the hollow case, and a forward operation, a backward operation, and a stopping operation of the electric floor nozzle, Both ends are supported by elastic bodies such as springs, and the direction of the floor nozzle is detected from the positive / negative / zero tripolar voltages generated by amplifying the output voltage of the coil with an amplifier under a constant bias. Floor nozzle direction detection sensor.

(3) A floor nozzle front-back direction detection sensor composed of a coil, a magnet, a spring, etc. provided in the electric floor nozzle, and a rotation speed control means for controlling the rotation of the rotating brush of the electric floor nozzle. , The peak value of the voltage signal obtained from the floor nozzle front-back direction detection sensor and the full width at half maximum or a predetermined decay time is detected to detect a control amount proportional to the operation speed of the floor nozzle, and suction force and rotation of the rotating brush are detected. It is configured to control.

(4) A floor nozzle front-back direction detection sensor composed of a coil, a magnet, a spring, etc. provided in the electric floor nozzle, and a rotation speed control means for controlling the rotation of the rotating brush of the electric floor nozzle. The positive and negative voltage signals obtained from the floor nozzle front-back direction detection sensor are detected, and the phase control means performs a soft start at startup.

[0012]

The present invention operates as follows by the above means.

(1) Coil provided on the electric floor nozzle
The floor nozzle front-back direction detection sensor consisting of magnets, springs, etc.
Since the coil is wound around the hollow case a plurality of times, magnets are installed in the hollow case, both ends are supported by elastic bodies such as springs, and slidable in the hollow case,
When the electric floor nozzle is operated back and forth, inertial force is applied to the magnet to move in the direction opposite to the operating direction, and an induced electromotive force is generated in the coil. The operation direction of the nozzle is detected by detecting the voltage polarity of the induced electromotive force, and the rotation direction of the rotary brush is controlled by the forward / reverse rotation direction control means.

(2) A coil bobbin in which a coil is wound a plurality of times in a hollow case, a magnet installed slidably in the hollow case, and a forward motion, a backward motion, and a stopping motion of the electric floor nozzle, Both ends are supported by elastic bodies such as springs, and the direction of the floor nozzle is detected from the positive / negative / zero tripolar voltages generated by amplifying the output voltage of the coil with an amplifier under a constant bias. Floor nozzle direction detection sensor.

(3) Since the nozzle front-back direction detection sensor has a structure in which a magnet slides in a coil, a high peak value is generated when the operation is fast, and a low peak value signal is generated when the sensor is operated slowly. It detects the peak value and half width of the voltage signal obtained from the nozzle front-back direction detection sensor, detects the control amount proportional to the operation speed of the floor nozzle, and acts to control the suction force and the rotation of the rotating brush. is there.

(4) When the positive / negative voltage signal obtained from the floor nozzle front-back direction detection sensor is detected and the positive voltage is changed to the negative voltage or the negative voltage is changed to the positive voltage, that is, from the forward movement of the nozzle to the backward movement. In the case of the reverse operation, the phase control means performs a soft start at the time of activation to reduce the inrush current.

[0017]

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

First, FIG. 1 shows the structure of the nozzle front-back direction detection sensor. In the figure, in the floor nozzle 36, a coil bobbin in which a coil 9 is wound a plurality of times around a hollow case 8 and a magnet 10 slidably installed in the hollow case 8 are provided. Further, both ends of the magnet 10 are supported by the floor nozzle 36 by elastic bodies such as springs 11 and 12.
Further, the mounting direction of the case 8 is the same as the operating direction of the floor nozzle 36.

FIG. 3 shows a schematic structure of the floor nozzle 36 of the present invention. The rotating brush 6 is attached to the electric motor 13 via the belt 14, and the nozzle front-back direction detecting sensor 15 is also in the floor nozzle 36. Is installed in the same direction as the operation direction of the floor nozzle 36.

Such a nozzle front-back direction detection sensor 15
With this configuration, when the electric floor nozzle 36 is operated back and forth, an inertial force is applied to the magnet 10 to move in the direction opposite to the operation direction, and an induced electromotive force is generated in the coil 9. By detecting the voltage polarity of this induced electromotive force, it becomes possible to detect the operating direction of the nozzle. Figure 4 shows such a signal generation situation.
Shown in. In FIG. 4, a forward voltage (a) is generated when the electric floor nozzle 36 is operating in the forward direction. Further, during backward operation, a negative voltage (b) is generated. When stopped, no voltage is generated. By detecting the extreme positive of the voltage in this way, the operation direction of the floor nozzle 36 can be identified.

FIG. 5 shows an embodiment of the present invention, which will be described with reference to the drawings. In the figure, 15 is a nozzle front-back direction detection sensor, and a resistor 16 is provided at both ends of the coil 9.
Is connected as a load, both ends of the resistor 16 are input to the amplifier 17, and the output of the amplifier 17 is the microcomputer 1
8 A / D input terminals. Further, a diode bridge 19 is connected to the commercial AC power supply, and a bridge circuit composed of switching transistors 20 to 23 is connected between the DC outputs so that the electric motor 13 can perform forward / reverse rotation control. Resistors 24-27 and diode 2
Reference numerals 8 and 29 are circuits for biasing the transistors. As described above, according to the configuration of FIG. 5, the operation direction of the floor nozzle is detected by the nozzle front-back direction detection sensor 15 without contacting the floor surface, and the rotation direction of the electric motor 13, that is, the rotation direction of the rotating brush is operated. It is possible to switch in conjunction with the direction. By changing the rotating direction of the rotating brush, it can be operated lightly on the carpet, and the dust collection performance is greatly improved.

FIG. 6 shows another embodiment of the present invention. In the figure, a peak voltage detecting means 30 and a voltage half-value width time detecting means 31 are provided at the output of the nozzle front-rear direction detecting sensor 15, and a control amount proportional to the operation speed of the floor nozzle 36 is obtained by the calculating means 32, and the suction force and the rotary brush are obtained. The number of rotations of 6 is controlled. FIG. 7 shows an explanation of the operation. When the floor nozzle 36 is slowly operated, the inertial force on the magnet 10 in the coil 9 is lowered, and the peak voltage value V _P1 of the generated electromotive force tends to be low and the duration T ₁ tends to be short.

On the contrary, when the floor nozzle 36 is operated quickly, the inertial force to the magnet 10 in the coil 9 becomes high and the peak voltage value V _P2 of the generated electromotive force tends to be high and the duration T ₂ tends to be long.
In this way, the peak voltage and the voltage half width time are calculated by the calculating means 32.
Since it is possible to determine the operation state of the floor nozzle by performing the determination by, the fine control suitable for the operation is realized.

FIG. 8 shows another embodiment of the present invention, which will be described with reference to the drawings. In the hardware configuration of FIG. 5, a positive / negative voltage signal obtained from the output of the nozzle front-back direction detection sensor 15 is detected, and a positive voltage is converted to a negative voltage, or
When the negative voltage is changed to the positive voltage, that is, when the nozzle moves from the forward direction to the backward direction and vice versa, the phase control means performs soft start at startup to reduce the inrush current by the microcomputer software.

[0025]

As described above, the vacuum cleaner of the present invention has the following effects.

(1) Since the brush rotation direction can be switched in association with the operation direction of the floor nozzle, the brush operation can be performed lightly and the dust collection performance is greatly improved.

Since the operation direction can be detected without contacting the floor surface, there is no mechanical wear and the sensor accuracy is improved.

(2) The forward movement, backward movement, and stopping movement of the electric floor nozzle can be detected with a simple structure. Further, since it is possible to detect the stopped state, if the stopping time continues for a certain period of time, the safety such as stopping the rotation of the rotating brush is improved.

(3) Further, the nozzle front-back direction detection sensor 15
Since the operating state of the floor nozzle can be determined by determining the peak voltage and the voltage half-width time by the calculating means 32, fine control suitable for the operation can be realized.

(4) When the positive / negative voltage signal obtained from the floor nozzle front-back direction detection sensor is detected and the positive voltage is changed to the negative voltage or the negative voltage is changed to the positive voltage, that is, from the forward movement of the nozzle to the backward movement thereof. In the case of the reverse operation, the life of the electric motor can be improved by softening the start time by the phase control means to reduce the inrush current.

[Brief description of drawings]

FIG. 1A is a perspective view of a floor nozzle front-back direction sensor according to an embodiment of the present invention. FIG. 1B is a cross-sectional view of the floor nozzle front-back direction sensor.

FIG. 2 is a schematic configuration diagram of a conventional vacuum cleaner.

FIG. 3 is a block diagram of an electric floor nozzle according to an embodiment of the present invention.

4A is a voltage characteristic diagram when the same-bed nozzle is operating, FIG. 4B is a same voltage characteristic diagram, and FIG. 4C is a same voltage characteristic diagram.

FIG. 5 is a schematic block diagram of a control device in the same embodiment.

FIG. 6 is a schematic block diagram of the control device.

FIG. 7A is an operation explanatory diagram in the present embodiment, and FIG. 7B is the same operation explanatory diagram.

FIG. 8 is an explanatory diagram of the same operation.

[Explanation of symbols]

 1 Vacuum Cleaner Main Body 2 Electric Blower 6 Rotating Brush 8 Case 9 Coil 10 Magnets 11, 12 Spring 13 Electric Motor 14 Belt 15 Nozzle Front-back Direction Detection Sensor 17 Amplifier 18 Microcomputer 20-23 Transistor 30 Peak Voltage Detection Means 31 Voltage Half-width Width Time Detection Means 32 computing means

Claims (4)

[Claims] 1. An electric vacuum cleaner having an electric blower for suction and an electric floor nozzle. A floor nozzle front-back direction detection sensor and an electric floor nozzle, which are composed of a coil, a magnet, a spring and the like provided in the electric floor nozzle. Of the floor nozzle front-back direction detection sensor has a hollow case in which a coil is wound a plurality of times, and the hollow case has a hollow case inside the hollow case. A magnet is installed and both ends are supported by elastic bodies such as springs so that it can slide inside the hollow case and the sliding direction is aligned with the front-back direction of the nozzle. By detecting the operation direction of the nozzle, and the rotation direction of the rotating brush is controlled by the forward / reverse rotation direction control means. Machine control device. 2. A coil bobbin in which a coil is wound a plurality of times around a hollow case, a magnet and both ends which are slidably installed in the hollow case, for forward movement, backward movement, and stopping movement of an electric floor nozzle. Is supported by an elastic body such as a spring, and is configured to detect the direction of the floor nozzle from the positive / negative / zero tripolar voltages generated by amplifying the output voltage of the coil with an amplifier under a constant bias. The control device for the electric vacuum cleaner according to claim 1, further comprising a floor nozzle direction detection sensor. 3. An electric vacuum cleaner having an electric floor nozzle, wherein a floor nozzle front-back direction detection sensor composed of a coil, a magnet, a spring, etc. provided in the electric floor nozzle and rotation of a rotating brush of the electric floor nozzle are controlled. Having a rotation speed control means to detect the peak value and half width of the voltage signal obtained from the floor nozzle front-back direction detection sensor or a predetermined decay time to detect a control amount proportional to the operation speed of the floor nozzle, A vacuum cleaner control device configured to control suction force and rotation of a rotating brush. 4. An electric vacuum cleaner having an electric floor nozzle, wherein a floor nozzle front-back direction detection sensor composed of a coil, a magnet, a spring, etc. provided in the electric floor nozzle and rotation of a rotating brush of the electric floor nozzle are controlled. A control device for an electric vacuum cleaner having a rotation speed control means for controlling the vacuum nozzle, and configured to detect a positive / negative voltage signal obtained from the floor nozzle front-back direction detection sensor and perform a soft start at the time of activation by the phase control means.