JPH07289486A - Control device for electric cleaner - Google Patents

Abstract

PURPOSE:To suppress not only the temp. rise value of an electromotive blower but also a brush spark caused by an overcurrent. CONSTITUTION:The current detection means 11 and current setting means 16 of an electromotive fan 2 are provided to an electric cleaner main body and a power setting means 26 and a power control signal transmission means 22 are provided to a manual operation part. The power consumption of the electromotive blower 2 is controlled on the basis of the phase value of phase control set by the power setting means 26 and the load current of the electromotive blower 2 is directly detected by the current detection means 11 and a current is controlled by a phase control means 14 so that the load current does not exceed the current value set by the current setting means 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an electric vacuum cleaner, and more particularly to a recent increase in suction force.

[0002]

2. Description of the Related Art A conventional vacuum cleaner will be described with reference to FIG.

As shown in the figure, a cleaner body (hereinafter referred to as a body) 1 has a built-in electric blower 2, and a hose 4, an extension pipe 5 and a floor suction tool 6 are connected to a suction port 3. . A hand operation unit 7 is provided at the tip of the hose 4,
The electric power of the electric blower 2 arranged in the main body 1 is controlled to be a predetermined electric power by operating the hand operation unit 7.

[0004]

However, in recent years, in the trend of increasing suction power of vacuum cleaners, overcoming thermal limitations of vacuum cleaners and ensuring the life of brushes of electric blowers further improve performance. It was an issue above.

The present invention solves the above-mentioned conventional problems, and suppresses the temperature rise value of an electric blower, and
The purpose is to suppress brush sparks due to overcurrent.

[0006]

A first means of the present invention for achieving the above object is to provide an electric blower body with an electric blower, a first phase control means, a current detection means for the electric blower, and a current setting. And a power control means for the electric blower and a power control signal transmission means in the hand operation section at the end of the hose, and the power consumption of the electric blower is controlled by the phase value of the phase control set by the power setting means. In addition, the current detecting means directly detects the load current of the electric blower, and the first phase control means performs constant current control so as not to exceed the current value set by the current setting means.

The second means comprises the current setting means of the first means by the first and second current setting means, and further has a phase angle detecting means for detecting the phase control amount of the electric blower,
The electric power of the electric blower is controlled by the phase value set by the hand operation unit, the load current of the electric blower is directly detected by the current detecting means, and the first and the first values are detected by the phase angle value detected by the phase angle detecting means. The two current setting means are switched to perform a two-step constant current control.

A third means is an electric blower body, an electric blower, a first phase control means, a current detection means of the electric blower, first and second current setting means, and a pressure detection means in the cleaner body. The electric power of the electric blower is controlled by the phase value set by the hand operation unit, the load current of the electric blower is directly detected by the current detection means, and the first value is detected by the pressure value detected by the pressure detection means. The second current setting means is switched to perform a two-step constant current control.

A fourth means has an electric blower main body which has an electric blower, a phase control means by a microcomputer, and a current detection means for the electric blower, and inputs a phase control signal from a hand operation unit to the microcomputer to drive the electric motor. In addition to controlling the power consumption of the blower, the current detection means directly detects the load current of the electric blower, and the load current is self-corrected by phase control up to the upper limit set value of the load current set by the microcomputer. is there.

The fifth means, in the system configuration of the fourth means, controls the load current of the electric blower at a predetermined constant phase value up to the lower limit current set value, and when the lower limit current set value is reached, the upper limit current is reached. It is configured to correct the load current up to a set value.

The sixth means is, in the system configuration of the fourth means, controlled by a predetermined constant phase value until the load current of the electric blower reaches the lower limit current set value, and reaches the upper limit current when the lower limit current set value is reached. The operation is performed in a fixed phase in which the load current is corrected to the set value, and when the amount of change in the load current reaches the set value, the electric power of the electric blower is reduced to provide a means for solving the problem.

[0012]

According to the first means for solving the above problems, the present invention provides:
By directly detecting the load current of the electric blower and limiting the upper limit current by constant current control so as not to exceed the set current value, the temperature rise value of the electric blower is suppressed and brush sparks due to overcurrent are suppressed to improve performance. Act to achieve.

Further, the second means for solving the problem directly detects the load current associated with the change in the air volume of the electric blower, and the first and second current setting means carry out the two-step constant current control, whereby the temperature of the electric blower is controlled. It suppresses the rise value and suppresses brush sparks due to overcurrent to achieve high performance, and also corrects performance deterioration due to air volume change and maintains and improves performance.

Further, the load current of the electric blower is directly detected by the third means for solving the problem, and the first and second current setting means are switched according to the pressure value detected by the pressure detecting means to perform a two-step constant current control. By doing so, it acts to correct the performance deterioration due to the change in the air volume and to maintain and improve the performance.

Further, according to the fourth problem solving means, the load current of the electric blower is directly detected by the microcomputer,
The load current is self-corrected up to the upper limit set value of the load current by the self-correction of the load current, thereby continuously correcting the performance deterioration due to the change in the air volume and maintaining and improving the performance.

Furthermore, since the load current of the electric blower is controlled within the upper limit and lower limit current setting range by the fifth means for solving the problem, the service life of the electric blower is ensured, and the performance deterioration due to the change of the air volume is continuously performed. It acts to correct and maintain and improve performance.

Further, according to the sixth means for solving the problems, when the load current of the electric blower decreases by a predetermined variation amount due to dust clogging or the like, the electric blower operates so as to reduce the electric power, so that the electric blower is prevented from being burnt by heat. To work.

[0018]

Embodiments 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.

(Embodiment 1) FIG. 2 is a block diagram of a controller for an electric vacuum cleaner showing a first embodiment of the present invention. In the figure, 8 is a main body control unit attached to the main body, and 9 is a hand control unit attached to a hand control unit 7 at the tip of the hose 4. The main body control unit 8 and the hand control unit 9 have two-core signal lines and two
It is connected with a total of four core electric wires.

The main body control section 8 uses a commercial power source for the electric blower 2
The bidirectional thyristor 10 and the current detecting means 11 are connected in series. The AC output of the current detection means 11 is rectified by the rectifier 12, smoothed by the capacitor 13, and input to the first phase control means 14. The resistor 15 is
It is a load resistance that determines the output of the current detection means 11. 1
Reference numeral 6 is a current setting means, and a reference potential for setting the current is input to the first phase control means 14. Also, the first
The first phase control means 14 is connected to a commercial power source.
From the DC power supply device 17 of the first AC synchronization signal generating means 1
8 is connected and used as a reference signal for phase control. The output of the first phase control means 14 is connected to the input terminal of the first photocoupler 19 via the limiting resistor 20. Between T2 and the gate terminal of the bidirectional thyristor 10, a first photocoupler 19 and a second photocoupler 22 which are power control signal transmission means are provided via a current limiting resistor 21.
Are connected in series. Further, the hand control unit 9 includes a second DC power supply device 23 and a second AC synchronization signal generating means 2.
4 and the second phase control means 25 are connected as shown in the figure, and the phase value of the phase control is transmitted to the main body control section 8 via the second photo coupler 22 according to the set value of the power setting means 26. Has been done.

The operation of the above configuration is as follows. The phase value of the phase control is transmitted to the main body control section 8 via the second photocoupler 22 according to the set value of the hand operation section 9 and is AND-processed with the output of the first photocoupler 19 of the main body to output the bidirectional thyristor 10. Since the amount of phase control is determined, when the power consumption of the electric blower 2 exceeds the current setting value set by the reference potential of the current setting means 16, the first photocoupler 19 limits the current and the upper limit current is always constant. Current value control will be applied.

FIG. 3 shows the relationship between the power consumption of the electric blower and the air volume in the first embodiment. In the figure, when the set phase value of the power setting means 26 is large or the amount of phase cut is large such as medium operation, and the current value is small, the current detecting means 11 is not limited and the phase is the same as the set phase value of the power setting means 26. Although it is controlled by the value, it is shown that the current is limited during the strong operation and is limited by the upper limit current value I1.

(Second Embodiment) A second embodiment will be described with reference to FIG. Although the basic configuration is almost the same as that of the first embodiment, the phase angle detecting means 27 for detecting the phase control value of the first phase controlling means 14 and the first and second current setting means 2 are detected.
8 and 29 are provided so that the current setting value of the constant current control can be set in two steps by the value of the phase angle of the first phase control means 14.

The operation of the above configuration is as follows. In a region where the amount of dust collected by the vacuum cleaner is small and the amount of air is relatively large, the electric power consumption of the electric blower 2 is controlled by the constant current value I1 set by the first current setting means 28. When the amount of collected dust increases and the amount of air flow decreases, the output phase value of the first phase control unit 14 decreases due to the constant current control.
When a certain set value is reached, the power consumption of the electric blower 2 is switched to the current value I2 set by the second current setting means 29, and the constant current control is further performed with a higher set current.

FIG. 5 shows the relationship between the power consumption of the electric blower and the air volume in the second embodiment. In the figure, when the set phase value of the power setting means 26 is large or the amount of phase cut is large such as medium operation, and the current value is small, the current detecting means 11 is not limited and the phase is the same as the set phase value of the power setting means 26. Although it is controlled by the value, the current is limited during strong operation, and the upper limit current value is controlled in two stages of I1 and I2.

(Third Embodiment) A third embodiment will be described with reference to FIG. Although the basic configuration is almost the same as that of the second embodiment, it has a pressure detecting means 30 in the cleaner body, and the current setting value for constant current control can be set in two stages by the value of the pressure detecting means 30. It was done.

The operation of the above configuration is as follows. In a region where the amount of dust collected by the vacuum cleaner is small and the pressure inside the vacuum cleaner is relatively small, the power consumption of the electric blower 2 is reduced to the first level.
The constant current control is performed with the current value I1 set by the current setting means 28, and when the amount of dust collection increases and the negative pressure value increases and reaches a certain set value, the power consumption of the electric blower 2 is set to the second current setting. The current value I2 set by the means 29 is switched, and further constant current control is performed with a higher set current.

FIG. 7 shows the relationship between the power consumption of the electric blower and the air volume in the third embodiment. In the figure, when the set phase value of the power setting means 26 is large or the amount of phase cut is large such as medium operation, and the current value is small, the current detecting means 11 is not limited and the phase is the same as the set phase value of the power setting means 26. It is controlled by the value, but the current is limited during strong operation, and the upper limit current value is 2 of I1 and I2 depending on the pressure setting value P1.
It is shown that it is controlled in stages.

(Fourth Embodiment) A fourth embodiment will be described with reference to FIG. Reference numeral 9 is a hand control unit at the tip of the hose 4. In the main body control unit 8, the electric blower 2, the bidirectional thyristor 10 and the current detecting means 11 are connected in series to a commercial power source. The AC output of the current detection means 11 is the rectifier 12
After being rectified by, it is smoothed by the capacitor 13 and input to the A / D terminal of the microcomputer 31. Resistance 1
Reference numeral 5 is a load resistance that determines the output of the current detection means 11. Further, the microcomputer 31 is connected to the first alternating-current synchronization signal generating means 18 from the first direct-current power supply device 17 connected to the commercial power supply, and is input to the microcomputer 31 as a phase control reference signal. .
Further, the phototransistor 33 and the second photocoupler 22 of the hand control unit 9 are connected in series through both ends of the commercial power source through the limiting resistor 32 so that the control signal of the hand operation unit 9 is input to the microcomputer 31. Is configured. The resistor 34 is a bias resistor of the phototransistor 33. A photocoupler 36 is connected in series between T2 and the gate terminal of the bidirectional thyristor 10 via a current limiting resistor 35. The input terminal of the photocoupler 36 is connected to the output terminal of the microcomputer 31 via the limiting resistor 37 so that the electric power of the electric blower 2 can be controlled.

The operation of the above structure is as follows. The phase value of the phase control is transmitted to the microcomputer 31 of the main body control unit 8 via the second photocoupler 22 according to the set value of the hand control unit 9, and the current detection unit 11 is also provided.
The load current of the electric blower 2 is directly detected by, and self-correction is performed by the phase control up to the upper limit set value of the load current set by the microcomputer 31, thereby continuously correcting the performance deterioration due to the change in the air volume and improving the maintenance of the performance. Acts to achieve

FIG. 9 shows an electric blower 2 according to the fourth embodiment.
It shows the relationship between the power consumption and the air flow rate. In the figure, when the set phase value of the power setting means 26 is large or the amount of phase cut is large such as medium operation, and the current value is small, the current detecting means 11 is not limited and the phase is the same as the set phase value of the power setting means 26. Although it is controlled by the value, the current is limited during strong operation, and the power consumption of the electric blower 2 is continuously increased and self-corrected as the air volume decreases.

(Fifth Embodiment) FIG. 10 shows the fifth embodiment.
Will be explained. The system configuration of the embodiment is the same as that of the fourth embodiment.

The above operation is as follows. The load current of the electric blower 2 is controlled at a predetermined constant phase value up to the lower limit current setting value I1, and when the lower limit current setting value I1 is reached, the load current is corrected to the upper limit current setting value I2.

(Embodiment 6) FIG. 11 shows the sixth embodiment.
Will be explained. The system configuration of the embodiment is the same as that of the fourth embodiment.

The operation of the above configuration is as follows. The load current of the electric blower 2 is controlled with a predetermined constant phase value until the lower limit current setting value I1 is reached, and when the lower limit current setting value I1 is reached, the load current is corrected to the upper limit current setting value I2, and then operation is performed at a fixed phase. At the same time, when the amount of change in the load current reaches the set value −ΔI, the electric power of the electric blower 2 is reduced.

[0036]

As is apparent from the above embodiments, the present invention directly detects the load current of the electric blower and limits the upper limit current by constant current control so as not to exceed the set current value. It is possible to suppress the temperature rise value and suppress brush sparks due to overcurrent.

Further, by performing the two-step constant current control by the first and second current setting means, it is possible to correct the performance deterioration due to the change in the air volume and to maintain and improve the performance.

Further, by self-correcting the load current of the electric blower by the microcomputer, it is possible to continuously correct the performance deterioration due to the change in the air volume and to maintain and improve the performance.

Further, when the load current of the electric blower decreases by a certain variation amount due to dust clogging or the like, the electric blower operates so as to reduce the electric power, so that the electric blower can be prevented from being burnt by heat.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a conventional electric vacuum cleaner.

FIG. 2 is a block diagram of a controller for the electric vacuum cleaner showing the first embodiment of the present invention.

FIG. 3 is a diagram showing power consumption versus air volume of the electric blower.

FIG. 4 is a block diagram of a control device for an electric vacuum cleaner showing a second embodiment of the present invention.

FIG. 5 is a diagram showing power consumption versus air volume of the electric blower.

FIG. 6 is a block diagram of a control device for an electric vacuum cleaner showing a third embodiment of the present invention.

FIG. 7 is a diagram showing power consumption versus air volume of the electric blower.

FIG. 8 is a block diagram of a control device for an electric vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 9 is a diagram showing power consumption versus air volume of the electric blower.

FIG. 10 is a diagram showing power consumption versus air volume of an electric blower according to a fifth embodiment of the present invention.

FIG. 11 is a diagram showing power consumption versus air volume of an electric blower according to a sixth embodiment of the present invention.

[Explanation of symbols]

 2 Electric Blower 10 Bidirectional Thyristor 11 Current Detection Means 14 First Phase Control Means 16 Current Setting Means 19 First Photocoupler (Power Control Signal Transmission Means) 22 Second Photocoupler (Power Control Signal Transmission Means) 25 Second phase control means 26 Power setting means 27 Phase angle detecting means 28 First current setting means 29 Second current setting means 30 Pressure detecting means 31 Microcomputer

Claims (6)

[Claims] 1. An electric vacuum cleaner body has an electric blower, a first phase control means, a current detection means and a current setting means for the electric blower, and a hand operating portion at the tip of the hose has a power setting means and electric power for the electric blower. With the control signal transmission means, while controlling the power consumption of the electric blower by the phase value of the phase control set by the power setting means, the current detection means directly detects the load current of the electric blower, and the current setting means A controller for an electric vacuum cleaner configured to perform constant current control by the first phase control means so as not to exceed a set current value. 2. The current setting means according to claim 1 is composed of first and second current setting means, and further has phase angle detecting means for detecting a phase control amount of the electric blower, and is set by a hand operation section. While controlling the electric power of the electric blower with the phase value
The load current of the electric blower is directly detected by the current detection means, and the first and second phases are detected by the phase angle value detected by the phase angle detection means.
The controller for the electric vacuum cleaner, which is configured to switch the current setting means and perform a two-step constant current control. 3. An electric blower body, an electric blower, a first phase control means, a current detection means of the electric blower, and first and second electric blowers.
Has a current setting means, a pressure detecting means in the cleaner body,
The electric power of the electric blower is controlled by the phase value set by the hand operation unit, the load current of the electric blower is directly detected by the current detection means, and the first and second currents are detected by the pressure value detected by the pressure detection means. A control device for an electric vacuum cleaner configured to perform two-stage constant current control by switching setting means. 4. The electric vacuum cleaner main body has an electric blower, a phase control means by a microcomputer, and a current detection means of the electric blower, and a phase control signal from a hand operation unit is input to the microcomputer to reduce the power consumption of the electric blower. A control device for an electric vacuum cleaner configured to control the load current of the electric blower directly by the current detection means, and self-correct the load current by phase control up to the upper limit set value of the load current set by the microcomputer. 5. An electric vacuum cleaner configured to control a load current of an electric blower at a predetermined constant phase value up to a lower limit current setting value, and to correct the load current up to an upper limit current setting value when the lower limit current setting value is reached. Control device. 6. The load current of the electric blower is controlled at a predetermined constant phase value up to the lower limit current setting value, and when the lower limit current setting value is reached, the load current of the electric blower is corrected to the upper limit current setting value at a fixed phase. A vacuum cleaner control device configured to further reduce the electric power of the electric blower when the amount of change in the load current reaches a set value.