JP3126154B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner for controlling the number of rotations of a motor in accordance with the movement of a hand operating portion of a hose tip relative to a human body.

[0002]

2. Description of the Related Art In recent years, with the diversification of objects to be cleaned, such as carpets, the number of rotations of a motor can be varied as necessary, or the number of sensors can be used to automatically control the number of rotations of a motor. What you do is becoming mainstream.

Conventionally, this type of vacuum cleaner generally has a configuration as shown in FIGS. Hereinafter, the configuration will be described.

[0004] As shown in the figure, a hose 2 is attached to a cleaner body 1.
To the extension pipe 3 connected to the hose 2 and the floor suction tool 4
And a hand operation unit 5 is provided at the tip of the hose 2. A motor 7 and a first bidirectional thyristor 8 are connected to the AC power supply 6, and a gate of the first bidirectional thyristor 8 is connected via a resistor 9 to a second bidirectional thyristor 1.
0 is connected, and the gate of the second bidirectional thyristor 10 and one terminal of the AC power supply 6 are connected to the trigger element 11,
The current control resistors 12 and 13 are connected to a switch 14 and a slide resistor 15 installed in the hand operation unit 5 at the tip of the hose 2. A capacitor 1 is connected between the trigger element 11 and the T1 terminal of the second bidirectional thyristor 10.
6 are connected. As is apparent from such a configuration, when the value of the slide resistor 15 of the hand operation unit 5 is changed, the charging time of the capacitor 16 changes, and the trigger timing of the trigger element 11 changes to change the rotation speed of the motor 7. Is controlled.

[0005]

In such a conventional vacuum cleaner, controlling the number of rotations of the motor 7 requires the user to manually change the value of the slide resistance 15 of the hand-held operation unit 5. However, there is a disadvantage that the operation is troublesome.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, in which a movement of a hand operation unit is detected by a state sensor, and an appropriate rotation speed of a motor is automatically set in accordance with the movement of the hand operation unit. It aims to improve operability.

[0007]

According to the present invention, in order to achieve the above object, a status sensor for detecting infrared rays generated from a human body is arranged at a hand operation portion of a hose, and the status sensor is provided with a front sensor .
By detecting the infrared light from the side of the hand operation unit,
Detecting a movement relative to the body before Symbol hand operation unit, the control means in response to an output of said condition sensor is a problem solving means controlling the rotation of the motor.

[0008]

According to the above-mentioned means for solving the problems of the present invention, the movement of the hand operation unit with respect to the human body can be detected by the state sensor, and the rotation speed of the motor is appropriately controlled according to the speed of movement of the hand operation unit. be able to.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 and 2 (a) and 2 (b).

As shown in FIG. 1, the state sensor 17 comprises a pyroelectric element 18 for detecting infrared rays, and detects heat generated from a human body as infrared rays to detect a human body. The amplifier 19 amplifies the output of the state sensor 17 and inputs the output to the control means 20. The control means 20 is a state sensor 1
7, the bidirectional thyristor 21 is controlled to control the rotation speed of the motor 22. 23 is a load resistance. The state sensor 17 is attached to the hand operation unit 24, and when a human body is present at a position indicated by a broken line a in FIG.
Heat can be detected by pyroelectric 18 as infrared rays generated from the human body from the side of the ie the operation portion 24.

The operation of the above configuration will be described. When a human body approaches, the pyroelectric element 18 of the state sensor 17 detects infrared rays. When the output terminal T of the pyroelectric element 18 detects a human body at a normal potential, the output terminal T changes to a high potential. After this signal is amplified by the amplifier 19, it is input to the control means 20. When a human body is located at the position indicated by the broken line a in FIG. 2A, the output terminal T has a high potential, so that the hand operation unit 24 outputs in the state of FIG. 3A and the state of FIG. The potential of the terminal T becomes 0 and a high potential, respectively. In the actual cleaning, the states shown in FIGS. 3A and 3B are alternately repeated, and the voltage waveform at the output terminal T at this time is a pulse waveform. FIGS. 4A and 4B show differences in the operation speed of the hand operation unit 24.
A difference appears in the pulse width as shown in FIG. Therefore, by calculating the number of pulses per unit time, the operation speed of the hand operation unit 24 can be detected, and the rotation speed of the motor 22 corresponding to the operation speed can be set.

As described above, according to the vacuum cleaner of the embodiment of the present invention, the state sensor 17 for detecting the operation speed of the hand operation unit 24 and the output of the state sensor 17 are input to control the rotation speed of the motor 22. Control means 20;
7 detects the movement of the hand operation unit 24 with respect to the human body by using the pyroelectric element 18 for detecting infrared rays generated from the human body. Therefore, the state sensor 17 configured by the pyroelectric element 18 detects the movement of the hand operation unit 24. , The rotation speed of the motor 22 can be automatically set in accordance with the movement of the hand operation unit 24, and the operability can be improved.

Next, another embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. As shown in the figure, the state sensor 25 has a compound lens 26 composed of two lenses disposed on the infrared detecting surface of the pyroelectric element 18. The state sensor 25 can detect the human body within the broken line b in FIG. 6, and the detection range of the human body is widened. In the present embodiment, a compound lens of two lenses is used as the compound lens. However, if a larger number of lenses are used, a wider range and a wider angle of the human body can be detected.

Next, another embodiment of the present invention will be described. The control means 20 in FIG. 1 controls the rotation speed of the motor 22 using fuzzy inference according to the output of the state sensor 17. Other configurations are the same as those of the embodiment of FIGS. FIG. 7 shows a membership function for implementing the present embodiment. FIG. 7 shows the number of pulses per unit time on the horizontal axis and the grade on the vertical axis. The number of pulses per unit time is a value obtained by counting the pulses output from the amplifier 19 per unit time. That is, the operation unit 2 at hand
If the operation speed of No. 4 is high, the number of pulses is large, and if the operation speed is low, the number of pulses is low.

Based on the membership function, the control means 20 controls the rotation speed of the motor 22 according to the following inference rules. That is, "when the hand operation unit 24 is stopped,
The rotation speed of the motor 22 is N1 "," N2 of the rotation speed of the motor 22 when the operation speed of the hand operation unit 24 is low ", and" The rotation speed of the motor 22 is N3 when the operation speed of the hand operation unit 24 is normal ""," When the operation speed of the hand operation unit 24 is fast,
The rotation speed of the motor 22 is controlled to be N4 ". Here, N1 <N2 <N3 <N4.

For example, if the number of pulses per unit time is as shown in FIG.
In the case of P, the grades are 0.25 and 0.7 for the "slow" and "normal" membership functions, respectively.
It becomes 5. At this time, the rotation speed Nd of the motor 22 is determined by the calculation of the center of gravity as Nd = (N2 × 0.25 + N3 × 0.75) / (0.25 + 0.75).

As described above, according to the vacuum cleaner of the embodiment of the present invention, the control means 20 controls the number of revolutions of the motor 22 using fuzzy inference according to the output of the state sensor 17, so that the fuzzy By the inference, the rotation speed of the motor 22 can be appropriately controlled in accordance with the operation speed of the hand operation unit 24, and the cleaning can be performed comfortably at the rotation speed suitable for the actual operation feeling.

[0018]

As is apparent from the above embodiments, according to the present invention, a state sensor for detecting infrared rays generated from the human body is arranged at the hand operation portion of the hose, and
By detecting the infrared rays from the side of the hand operation unit, the movement of the hand operation unit with respect to the human body is detected, and the control unit controls the rotation of the motor according to the output of the state sensor. In addition, the number of rotations of the motor is automatically varied in accordance with the movement of the operation unit at hand, thereby relieving troublesome switch operations and improving operability.

Further, since a pyroelectric element is used for the state sensor and a compound lens composed of a plurality of lenses is arranged on the infrared detecting surface of the pyroelectric element, the detection range of the human body can be widened.
Detection accuracy can be improved.

Further, the control means controls the motor rotation speed using fuzzy inference according to the output of the state sensor. Control can be performed, and cleaning can be performed comfortably at a rotation speed that matches the feeling of actual operation.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a vacuum cleaner according to one embodiment of the present invention.

FIG. 2A is a top view of a hand operation unit of the vacuum cleaner. FIG. 2B is a side view of a hand operation unit of the vacuum cleaner.

FIG. 3A is a diagram showing the use state of the vacuum cleaner. FIG. 3B is a diagram showing another use state of the vacuum cleaner.

FIG. 4 (a) is an output waveform diagram of the state sensor when the operation speed of the hand operation unit of the vacuum cleaner is fast. (B) The output of the state sensor when the operation speed of the hand operation unit of the vacuum cleaner is slow. Waveform diagram

FIG. 5 is a perspective view of a state sensor of a vacuum cleaner according to another embodiment of the present invention.

FIG. 6 is an explanatory diagram of a human body detection range of the state sensor.

FIG. 7 is a diagram showing a membership function of fuzzy inference of a control unit according to another embodiment of the present invention.

FIG. 8 is a perspective view of a conventional vacuum cleaner.

FIG. 9 is a circuit diagram of the vacuum cleaner.

[Explanation of symbols]

 17 state sensor 18 pyroelectric element 20 control means 22 motor 24 hand operation unit

Continuation of the front page (72) Inventor Tadashi Matsushiro 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-7930 (JP, A) (58) Fields investigated .Cl. ⁷ , DB name) A47L 9/28

Claims (3)

(57) [Claims] 1. A state sensor for detecting infrared rays generated from a human body is arranged at a hand operation portion of a hose, and the state sensor is provided with the state sensor .
Detecting the infrared light from the side of the hand operation unit;
In, it detects motion on the human body before Symbol operation portion, an electric vacuum cleaner control means controls the rotation of the motor in accordance with the output of the state sensor. 2. The vacuum cleaner according to claim 1, wherein a pyroelectric element is used as the state sensor, and a compound lens including a plurality of lenses is arranged on the infrared detecting surface of the pyroelectric element. 3. The vacuum cleaner according to claim 1, wherein the control means controls the number of revolutions of the motor using fuzzy inference according to the output of the state sensor.