JPH07322987A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To discriminate the power frequency by using a zero-volt pulse generating means generating a pulse synchronously with the zero point of the commercial power voltage, a timer means, and electronic parts such as resistors and a capacitor. CONSTITUTION:When the voltage of a commercial power source 6 is applied, it is full-wave-rectified by a rectifying bridge 7, and the pulse synchronous with the zero point of the commercial power source 6 is inputted to the terminal A of a timer means 11 via resistors 1, 2 and a transistor 3. An output appears at the terminal Q of the timer means 11. When a leading edge is detected at the terminal A, 'H' appears at the terminal Q, and it becomes 'L' after tw. When a leading edge is again detected at the terminal A while the terminal Q is kept at 'H', tw is counted from this time. The tw is the time determined by the product of the resistance value R21 of a resistor 21 and the capacity C22 of a capacitor 22. When the power frequency is 50Hz, the output of a transistor 17 becomes 'H'. When the frequency is 60Hz, the output becomes 'L'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner whose suction force can be controlled.

[0002]

2. Description of the Related Art In recent years, electric vacuum cleaners have generated a strong suction force with the diversification of objects to be cleaned such as rugs, and an increasing number of hand-operated units change the suction force. There is also one that controls the suction force according to the dust such as the floor surface.

FIG. 20 shows an example of a conventional electric vacuum cleaner 101.
Is a cleaner body, 102 is a hose, 103 is a hand operation unit,
Reference numeral 104 is an extension tube, and 105 is a floor suction tool.

FIG. 21 is a circuit diagram of a conventional electric vacuum cleaner. The hand operation unit 103 has a control means 111, which outputs a signal for controlling the phase of the motor 4 in the main body 101 of the vacuum cleaner. The ignition angle of the directional thyristor 5 is controlled.

The control means 111 has a power supply section 117 for supplying power to each section in the control means 111, a zero point detection section 118 for detecting a zero V point of the AC power supply 6, and a user selects a suction force. A switch unit 120 for displaying the operating state, a display unit 121 for displaying the operating state, a sensor unit 123 for detecting dust sucked from the floor surface, a control unit 119 for determining the operating state by input from each of the above units, and signals from the control unit. The phase control unit 122 outputs a phase control signal.

The control unit 119, the phase control unit 122, the zero point detection unit 118, and the like can be composed of a microcomputer and other peripheral parts.

With this configuration, the user can set the suction force of the vacuum cleaner with the hand operation unit 103.

[0008]

However, in the above-mentioned conventional configuration, a microcomputer or the like is often used, which is generally expensive, but phase control is not performed without zero point detection. (Description of the configuration is omitted.) The difference in the power supply frequency (50/60 Hz) causes a difference in the input power of the motor 4.

Further, if a large amount of dust is contained in the dust collecting chamber in the cleaner body 101, the suction force will be reduced.

Besides, in the method of increasing the power consumption according to the dust on the floor, assuming that there is always a lot of dust,
The motor 4 is overheated.

The present invention solves the above problems,
The first aspect of the present invention aims to identify power supply frequencies of 50 Hz and 60 Hz with an inexpensive circuit configuration without using a microcomputer or the like.

A second object of the present invention is to obtain an accurate input power in which the motor input does not greatly change at the power supply frequency of 50/60 Hz by using the frequency discriminating means and the phase controlling means which are inexpensive in circuit configuration.

According to a third aspect of the invention, the input of the motor does not change depending on the power supply frequency, and when the vacuum pressure in the dust collection chamber becomes low due to an increase in dust in the dust collection chamber, this is also detected to detect the motor. The purpose is to inexpensively configure the means for controlling to increase the input.

In the fourth aspect of the present invention, the input of the motor does not change depending on the power supply frequency, and the pressure in the dust collection chamber and the amount of dust to be sucked in are reduced even when the suction force is likely to decrease, such as when dust is increased in the dust collection chamber. The amount of dust is detected, and when the vacuum pressure in the dust collection chamber is high and the amount of dust to be sucked in is large, the motor can be controlled to comfortably clean it so as to increase the suction power, and usually the power supply to the motor is reduced and the motor The purpose is to improve the durability by preventing overheating, and to easily configure the control circuit of each of the hand operation part and the cleaner body to obtain the suction force that matches the purpose of use.

According to the fifth aspect of the invention, the input of the motor does not change depending on the power source frequency, and even when the suction force is likely to decrease, such as when the dust increases in the dust collection chamber, the pressure in the dust collection chamber and the suction dust When the vacuum pressure in the dust collection chamber is high and the amount of dust to be sucked in is large, the motor is controlled to increase the suction force for comfortable cleaning, and the temperature inside the cleaner body is detected to detect the amount of dust. When overheating, reduce the power supply to the motor and prevent overheating of the motor to improve durability, easily configure the control circuit of the hand operation part and the vacuum cleaner body, and obtain the suction force that matches the purpose of use. It is an object.

[0016]

In order to achieve the above object, the vacuum cleaner of the present invention has the following means.

1. It has a zero volt pulse generating means for generating a pulse in synchronism with the zero point of the commercial power source voltage, a timer means, and a frequency discriminating means having a resistor and a capacitor.

2. Zero volt pulse generating means for generating a pulse in synchronism with the zero point of the commercial power supply voltage, frequency determining means having a timer means and a resistor and a capacitor,
It has a phase control means having a timer means, a resistor and a capacitor.

3. Zero volt pulse generating means for generating a pulse in synchronism with the zero point of the commercial power supply voltage, frequency determining means having a timer means and a resistor and a capacitor,
It has a timer means, a resistor, a capacitor, and a phase control means having a pressure switch that opens and closes according to the pressure in the dust collection chamber.

4. The hand operation unit has a dust sensor unit and the dust sensor unit has first phase control means for changing the phase according to the output, and is synchronized with the zero point of the commercial power supply voltage in the cleaner body. Second means having a zero-volt pulse generating means for generating a pulse, a frequency determining means having a timer means and a resistor and a capacitor, and a pressure switch for opening and closing according to the pressure in the dust collecting chamber and the timer means, the resistor and the capacitor. It has a phase control means.

5. The hand operation section has a dust sensor section, and the dust sensor section has first phase control means for changing the phase according to the output, and is synchronized with the zero point of the commercial power supply voltage in the cleaner body. Pulse generator for generating a pulse, a frequency discriminating means having a timer means and a resistor and a condenser, a pressure switch for opening and closing according to the pressure in the timer means, the resistor, the condenser and the dust collecting chamber and the cleaner body. It has the 2nd phase control means which has a temperature switch which opens and closes according to the temperature inside.

[0022]

[Action]

1. 50/6 of the power supply frequency by using the means for generating the pulse in synchronization with the zero point of the power supply voltage and the timer means
0 Hz can be easily discriminated.

2. By using the means for generating a pulse in synchronization with the zero point of the power source voltage and the timer means, it is possible to easily discriminate between 50/60 Hz of the power source frequency and perform phase control according to the power source frequency. .

3. By using the means for generating a pulse in synchronization with the zero point of the power supply voltage and the timer means, 50/60 Hz of the power supply frequency can be easily discriminated, and the phase control according to the power supply frequency can be performed. At the same time, by detecting the vacuum pressure in the dust collecting chamber using the pressure switch, the suction force does not decrease even if the amount of dust in the dust collecting chamber increases.

4. By using the means for generating a pulse in synchronization with the zero point of the power supply voltage and the timer means, it is possible to easily discriminate between 50/60 Hz of the power supply frequency and perform phase control according to the power supply frequency. At the same time, the pressure inside the dust collection chamber is detected using a pressure switch, and the dust sensor detects the amount of dust to be sucked in.Therefore, if there is a lot of dust on the floor and a strong suction force is required, dust will not enter the dust collection chamber. Even if it increases, the suction power does not decrease.

5. By using the means for generating a pulse in synchronization with the zero point of the power supply voltage and the timer means, 50/60 Hz of the power supply frequency can be easily discriminated, and the phase control according to the power supply frequency can be performed. At the same time, the pressure inside the dust collection chamber is detected using a pressure switch, and the dust sensor detects the amount of dust to be sucked in.Therefore, if there is a lot of dust on the floor and a strong suction force is required, dust will not enter the dust collection chamber. Even if it increases, the suction force does not decrease, and if the vacuum cleaner body overheats, it can be detected by the temperature switch, the power supply to the motor can be reduced, the motor can be prevented from overheating, and the durability of the motor can be improved.

[0027]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described with reference to the drawings. Hereinafter, components having the same function will be denoted by the same reference symbols, and description thereof will be omitted.

In FIG. 1, when the voltage of the commercial power source 6 is applied, the full-wave rectification is performed by the rectification bridge 7 (see FIG. 3).
(B)), the commercial power supply 6 (FIG. 3 (a)) to the terminal A of the timer means 11 by the resistors 1 and 2 and the transistor 3.
A pulse (FIG. 3C) synchronized with the zero point of is input.

Here, in the timer means 11, an output appears at the Q terminal as shown in FIG. That is, when the rising edge of the A terminal is detected, the Q terminal becomes "H", and after tw "
Although it becomes L ”, when A rises again while the terminal of Q is“ H ”, tw is counted from that point.

Tw is a time determined by the product of the resistance value R21 of the resistor 21 and the capacitance C22 of the capacitor 22, and in this embodiment, tw = tr, as shown in FIGS. R21 and C22 are determined so as to be in the middle of the pulse interval of frequencies 50 Hz and 60 Hz.

As a result, when the power supply frequency is 50 Hz, the output Q of the timer means 11 is the input A as shown in FIG.
Becomes "L" after tw from the rising edge of, the capacitor 14 is charged in the period of "L" and the transistor 17 is turned on, and the transistor 17 is turned on by the current from the capacitor 14 even after the output Q becomes "H". To do.

Next, when the power supply frequency is 60 Hz, the input A rises again before tw elapses after the rise of the input A to the timer means 11, so that the constant output Q is "H".
Therefore, the transistor 17 remains off.

Therefore, the output of the transistor 17 is "H" at 50 Hz and "L" at 60 Hz.

In this embodiment, the timer means 11 is explained as an integrated circuit, and the resistor 8, the capacitor 9, the zener diode 10 and the diode 18 are used to form a DC low voltage source.

The timer means 11 of this embodiment can be composed of one commercially available general-purpose IC. (Embodiment 2) A second embodiment of the present invention will be described.

Hereinafter, components having the same effects as those of the first embodiment and the conventional example and components having the same operation are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 5 is a circuit diagram of the second embodiment. The timer means 20 operates the outputs Q and RQ with respect to the input A at the timings shown in FIG. 6, and has two systems of timer means. .

Similar to the first embodiment of the present invention, the frequency discrimination is made the input A1, the timer settings T11, T12, and the output Q1, and the same operation is performed.

That is, when the power supply frequency is 50 Hz,
The transistor 17 turns on and turns off at 60 Hz.

Another system of timer means 20 determines the trigger timing for phase control.

When a rising waveform is input to A2, tp
After that, RQ2 becomes "H", a voltage is applied to the motor 4 via the transistor 27 and the optical trigger element 28, and the phase can be controlled.

The trigger timing is determined by tp, can be changed by the resistance value VR30 of the variable resistor 30, and can be stopped / operated by the switch 31.

Since the transistor 17 is off when the power supply frequency is 50 Hz, tp is determined by the product of the sum of the resistors 23 and 24 and the variable resistor 30 and the capacitor 25.
At 60 Hz, the resistor 23 is short-circuited by the transistor 26, and tp is the resistor 24 and the variable resistor 3
It is determined by the product of the sum of 0 and the capacitor 25.

As described above, by using the timer means 20, the power source frequency can be discriminated and the motor input can be controlled by the phase control.

(Embodiment 3) A third embodiment of the present invention will be described.

Hereinafter, components having the same effects as those of the first and second embodiments and the conventional example and components having the same operation are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 8 is a circuit diagram of the third embodiment.
Is a pressure switch. 9 is a schematic view of the inside of the cleaner body 101, in which a pressure switch 35 for detecting the vacuum pressure in the dust collection chamber 40 is installed as shown in FIG. 10, and a schematic cross-sectional view of the pressure switch 35 is shown in FIG. Indicates.

As shown in FIG. 9, the pressure switch 35 of the present embodiment is constructed so as to detect a difference with respect to the atmospheric pressure near the motor 4 and close it. An elastic film that descends (hereinafter referred to as an elastic film)
41 pushes the movable contact plate 42, contacts the fixed terminal 43, and closes the switch.

Normally, when the vacuum pressure in the dust collection chamber 40 is not too high, the pressure switch 35 is off and the transistor 36 is off, so that 50H as in the second embodiment.
Phase control is performed according to z and the power supply frequency of 60 Hz.

When the vacuum pressure in the dust collecting chamber 40 rises and the pressure switch 35 is turned on, the resistors 23 and 24 and the variable resistor 3 are turned on.
Resistor 37 is connected in parallel to 0,
As shown in FIG. 11, the voltage applied to the motor 4 becomes large.

(Embodiment 4) A fourth embodiment of the present invention will be described.

Hereinafter, components having the same effects as those of the first, second and third embodiments and the conventional example and components having the same operation are designated by the same reference numerals and the description thereof will be omitted.

FIG. 12 is a circuit block diagram of the fourth embodiment. Reference numeral 58 is a first phase control means which is constructed in the hand operation section 103, and 59 is a second phase control means which is the cleaner body 10.
1 is configured.

FIG. 13 shows a state in which the dust sensor portion 49 is attached. The dust passing through the air flow path is the light emitting element 50.
The light from the light is blocked and the output of the light receiving element 51 changes.

The number of times this change occurs within a predetermined time is counted to detect the amount of dust sucked in.

The control means 54 changes the trigger timing of the optical trigger element 55 according to the amount of dust detected by the dust sensor 49.

Reference numeral 59 has a pressure switch 35 (for details of the pressure switch, refer to the third embodiment), and the control means 56 changes the trigger timing of the optical trigger element 57 by turning it on and off.

The control means 56 is shown in the circuit diagram of FIG.
The description is omitted because it is almost the same as the third embodiment.

However, in the present invention, since the hand-held operation unit 103 has an operation unit and the control means 56 is inside the cleaner body 101, there is no variable resistor and switch, and there is no power supply for each state of the pressure switch 35. Frequency 50Hz and 60H
The trigger timing of each z is constant.

As shown in FIG. 12, an optical trigger element 55 whose trigger timing is changed by the dust sensor section 49.
The optical trigger element 57 whose trigger timing changes depending on the state of the pressure switch 35 and the gate of the bidirectional thyristor 5 are connected in series, and the electric power of the motor 4 is controlled by phase control.

With this configuration, each optical trigger element 5
When the trigger timings of 5 and 57 are different, the one triggered at the later timing has priority.

FIG. 15 shows this state. The bidirectional thyristor 5 is turned on at the trigger timing of the optical trigger element 57 because the trigger timing of the optical trigger element 57 is late during the first half of the time, and the trigger timing is reached during the latter half of the time. The bidirectional thyristor 5 is turned on at the timing of the optical trigger element 55 having a late timing.

Therefore, if either one of the optical trigger elements is not triggered, the motor 4 is stopped. Therefore, by providing a switch for operation on the hand operation unit 103, the electric power of the motor 4 can be controlled at the hand portion, and Two signal transmission lines may be provided in the hose.

FIG. 16 shows changes in power consumption due to dust detected by the pressure switch 35 and the dust sensor unit 49.

First, when the pressure switch 35 is off (when the degree of vacuum in the dust collecting chamber is relatively low), FIG.
As described above, the power consumption (phase control angle) is determined as shown by 62 and 63 in FIG.

At this time, the phase control angle of the bidirectional thyristor 5 at the power consumption shown by 62 is not fully conductive.

Next, when the pressure switch 35 is on (when the degree of vacuum in the dust collecting chamber is relatively high), FIG.
The power consumption (phase control angle) is determined as shown by 64 and 65 in FIG.

The power consumption indicated by 64 is the amphoteric thyristor 5.
Indicates that it is fully conductive.

That is, in this embodiment, when there is a dust amount above the reference level shown by 66 in the same figure and the pressure switch 35 is turned on at that time, the bidirectional thyristor 5 becomes fully conductive and the reference level is reached. Even with the above amount of dust, full conduction is not achieved when the pressure switch 35 is off.

(Fifth Embodiment) A fifth embodiment of the present invention will be described.

Hereinafter, components having the same effects as those of the first, second, third, fourth embodiments and the conventional example and components having the same operation are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 17 is a circuit block diagram of the fifth embodiment, in which a temperature switch 70 is provided in the cleaner main body 101 (not shown) and is turned on during normal operation / stop.

Therefore, the operation when the temperature switch 70 is turned on is exactly the same as that of the fourth embodiment, and the explanation thereof is omitted.

By providing the temperature switch 70 on the main body 101, the temperature switch 70 is turned off when the motor 4 is overheated, for example, when the bidirectional thyristor 5 is fully conductive for a long time, and the full conduction is released.

That is, since the circuit of the pressure switch 35 is opened when the temperature switch 70 is turned off, the bidirectional thyristor 5 is not fully conductive.

[0076]

As is apparent from the above description of the embodiments, each invention has the following effects.

1. The frequency discriminating means can be easily constructed by using the timer means and relatively inexpensive electronic parts such as resistors and capacitors.

2. Inexpensive and accurate phase control means according to the power supply frequency is constructed by using the frequency discriminating means constituted by using the timer means and the relatively inexpensive electronic parts such as resistors and capacitors. Therefore, the input power of the motor can be made almost constant regardless of the power supply frequency.

3. A timer means, a frequency discriminating means constituted by using relatively inexpensive electronic parts such as a resistor and a capacitor, and a pressure switch are used, and the cost is low and independent of the power supply frequency. A phase control unit can be configured according to the vacuum pressure.

4. The vacuum pressure in the dust collection chamber is high, and the suction force is increased when dust is being sucked in. Therefore, even if dust is increased in the dust collection chamber, the suction force does not decrease. In other cases, to the motor. Can reduce the power supply of the
The control unit in the main body of the vacuum cleaner is composed of inexpensive electronic parts such as timer means, which enables accurate phase control according to the power supply frequency and does not require many signal transmission paths.

5. The vacuum pressure in the dust collection chamber is high, and since the suction force is increased when dust is being sucked in, the suction force does not decrease even if there is more dust in the dust collection chamber. In other cases, to the motor. The power supply can be reduced to save power, and the motor can be prevented from overheating and the durability of the motor can be improved.

[Brief description of drawings]

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

FIG. 2 is a timing chart of the timer means of the embodiment.

3A is a power supply waveform diagram of the embodiment, FIG. 3B is a bridge output full-wave rectification waveform diagram of the embodiment, FIG. 3C is a timer means input waveform diagram of the embodiment, and FIG. Pulse diagram at 50 Hz (e) is a pulse diagram at 60 Hz of the same embodiment

FIG. 4 (a) is an input / output pulse diagram of the timer means at 50 Hz in the same embodiment. FIG. 4 (b) is an input / output pulse diagram of the timer means at 60 Hz in the same embodiment.

FIG. 5 is a circuit diagram of a vacuum cleaner according to a second embodiment of the present invention.

FIG. 6 is a timing chart of the timer means of the embodiment.

FIG. 7 is a timing chart of the embodiment.

FIG. 8 is a circuit diagram of an electric vacuum cleaner according to a third embodiment of the present invention.

FIG. 9 is a schematic plan sectional view of the inside of the electric vacuum cleaner of the embodiment.

FIG. 10 is a sectional view of the pressure switch of the embodiment.

FIG. 11 is a timing chart of the same embodiment.

FIG. 12 is a circuit block diagram of a vacuum cleaner according to a fourth embodiment of the present invention.

FIG. 13 is a cross-sectional view of the dust sensor unit of the same embodiment.

FIG. 14 is a circuit diagram of the control means of the embodiment.

FIG. 15 is a phase control pattern diagram of the embodiment.

16A is a diagram showing the amount of waste within a predetermined time in the same embodiment, FIG. 16B is a diagram showing the amount of waste and power consumption when the pressure switch of the embodiment is on, and FIG. Figure showing the amount of waste and power consumption when the example pressure switch is off

FIG. 17 is a circuit block diagram of an electric vacuum cleaner according to a fifth embodiment of the present invention.

FIG. 18 is a circuit diagram of the control means of the embodiment.

FIG. 19 is a phase control pattern diagram of the embodiment.

FIG. 20 is a perspective view of a conventional vacuum cleaner.

FIG. 21 is a circuit diagram of a conventional vacuum cleaner.

[Explanation of symbols]

 6 Commercial Power Supply 11, 20 Timer Means 12 Zero Volt Pulse Generating Means 13 Frequency Discriminating Means 15, 34 Phase Control Means 35 Pressure Switch 49 Dust Sensor Section 58 First Phase Control Means 59 Second Phase Control Means 70 Temperature Switch

Claims (5)

[Claims] 1. An electric vacuum cleaner having a zero volt pulse generating means for generating a pulse in synchronism with a zero point of a commercial power supply voltage, a timer means, and a frequency discriminating means having a resistor and a capacitor. 2. A zero volt pulse generating means for generating a pulse in synchronization with the zero point of the commercial power supply voltage, a frequency discriminating means having a timer means, a resistor and a capacitor, and a phase control having a timer means, a resistor and a capacitor. A vacuum cleaner having means. 3. A zero volt pulse generating means for generating a pulse in synchronization with the zero point of the commercial power supply voltage, a frequency determining means having a timer means and a resistor and a capacitor, a timer means, a resistor, a capacitor and a dust collection chamber. An electric vacuum cleaner having a phase control means having a pressure switch that opens and closes according to the pressure of the electric vacuum cleaner. 4. A hand-operated portion has a dust sensor portion, and the dust sensor portion has a first phase control means for changing a phase according to an output, and is synchronized with a zero point of a commercial power supply voltage in a cleaner body. Second means having a zero volt pulse generating means for generating a pulse, a frequency determining means having a timer means and a resistor and a condenser, a timer means, a resistor, a condenser and a pressure switch which opens and closes according to the pressure in the dust collecting chamber. The electric vacuum cleaner having the phase control means of 1. and controlling the motor by the two phase control means. 5. The hand operation unit has a dust sensor unit, and the dust sensor unit has first phase control means for changing the phase according to the output, and is synchronized with the zero point of the commercial power supply voltage in the cleaner body. Pulse generator for generating a pulse, a frequency discriminating means having a timer means and a resistor and a condenser, a pressure switch for opening and closing according to the pressure in the timer means, the resistor, the condenser and the dust collecting chamber and the cleaner body. Second with a temperature switch that opens and closes according to the internal temperature
The electric vacuum cleaner having the phase control means of 1. and controlling the motor by the two phase control means.