JP2929938B2 - 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 controller for a 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. . At the tip of the hose 4, a hand operation unit 7 is provided.
By operating the hand operation unit 7, the electric blower 2 disposed in the main body 1 is controlled so that the electric power of the electric blower 2 becomes a predetermined electric power.

[0004]

However, in recent years, with the trend of increasing the suction force of the vacuum cleaner, overcoming the thermal limitation of the vacuum cleaner and securing the life of the brush of the electric blower have further improved the performance. The above was a challenge.

[0005] The present invention solves the above-mentioned conventional problems and suppresses the temperature rise of the electric blower.
The purpose is to suppress brush spark due to overcurrent.

[0006]

The first object of the present invention to achieve the above object is to provide a vacuum cleaner main body.
An electric blower, a current detecting means of the electric blower,
First and second current setting means for setting a current limit; and
The load current of the current detecting means is equal to the first and second current setting means.
First phase to control the phase so as not to exceed the upper stage current
It has control means, and the power setting of the electric blower
And means and the power control signal transmitting means, a phase angle detection means for detecting the phase control amount of the electric blower, the power set
The electric power of the electric blower is controlled by the phase value of the phase control set by the determining means, and the electric blower is controlled by the current detecting means.
The load current of the machine is directly detected and detected by the phase angle detection means.
The first and second current setting means are turned off according to the value of the set phase angle.
Do not exceed the upper limit current value of the switched current setting means.
The two-stage constant current control is performed by the first phase control means.
This is the configuration.

Further, a second object of the present invention is to provide an electric blower, a current detecting means for the electric blower,
First and second current setting means for setting the upper limit current of, and
The load current of the current detecting means is equal to the first and second current setting.
The first phase control that does not exceed the upper limit current of the
It has phase control means, and the power of the electric blower is
It has a setting means and a power control signal transmission means, has a pressure detection means in the cleaner body, and is set by the power setting means.
The electric power of the electric blower is controlled by the phase value of the phase control, and the load current of the electric blower is directly
Detected, and the pressure value detected by the pressure detecting means
The first and second current setting means are switched, and the switched current setting means is switched.
The first phase control means so as not to exceed the upper limit current value of the stage
Thus, two-stage constant current control is performed .

[0008] A third means for solving the problems is a vacuum cleaner book.
Electric blower on the body, phase control by microcomputer
Means, electric blower current detection means,
These phase control signals are input to a microcomputer and
In addition to controlling the power consumption of the blower,
The load current of the dynamic blower is directly detected and
Load current up to the load current upper limit set by the
Self-correction, the current detection means
In this case, the electric blower
Is configured to continuously increase power consumption .

[0009]

According to the first aspect of the present invention, there is provided:
By directly detecting the load current associated with a change in the air flow of the electric blower, and performing two-stage constant current control by the first and second current setting means, the temperature rise value of the electric blower is suppressed and the brush spark due to overcurrent is suppressed. In addition, it functions to achieve high performance and correct performance degradation due to a change in air flow, thereby maintaining and improving performance.

According to the second problem solving means, the load current of the electric blower is directly detected, and the first and second current setting means are switched based on the pressure value detected by the pressure detecting means to perform two-stage constant current control. This serves to correct the performance degradation due to the change in the air flow and to maintain and improve the performance.

According to the third means for solving the problem, the microcomputer detects the load current of the electric blower directly, and self-corrects the load current by the phase control up to the upper limit set value of the load current to continuously reduce the performance accompanying the change in the air flow. It works to maintain and improve performance.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) FIG. 2 is a block diagram of a control device for a vacuum cleaner showing a first embodiment of the present invention. In the figure, reference numeral 8 denotes a main body controller attached to the main body, and 9 denotes a hand controller 7 at the tip of the hose 4.
It is a hand control unit attached to. The main body control unit 8 and the hand control unit 9 are connected by a total of four wires of a two-core signal line and a two-core power line.

The main body control unit 8 controls the electric blower 2
And a bidirectional thyristor 10 and a current detecting means 11 are connected in series. The AC output of the current detecting means 11 is rectified by a rectifier 12, then smoothed by a capacitor 13, and input to a first phase control means 14. The resistor 15 is
This is a load resistance that determines the output of the current detecting means 11. 1
Reference numeral 6 denotes a current setting means, which inputs a reference potential for setting current to the first phase control means 14. Also, the first
The first phase control means 14 connected to the commercial power supply
The first AC synchronizing 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 the T2 and the gate terminal of the bidirectional thyristor 10, a first photocoupler 19 and a second photocoupler 22, which are power control signal transmitting means, are connected via a current limiting resistor 21.
Are connected in series. The hand control unit 9 includes a second DC power supply unit 23 and a second AC synchronization signal generation unit 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 unit 8 via the second photocoupler 22 according to the set value of the power setting means 26. Have been.

The operation of the above configuration is as follows. The phase value of the phase control is transmitted to the main body control unit 8 via the second photocoupler 22 according to the set value of the hand operation unit 9, and is AND-processed with the output of the first photocoupler 19 of the main body to perform the bidirectional thyristor 10. Since the amount of phase control is determined, when the power consumption of the electric blower 2 exceeds the current set value set by the reference potential of the current setting means 16, the current is limited by the first photocoupler 19 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 phase cut amount is large and the current value is small, such as when the phase value set by the power setting means 26 is weak or during middle operation, the current detection means 11 is not limited and the phase according to the phase value set by the power setting means 26 is not applied. In the case of a strong operation, the current is limited and the upper limit current value I1 is limited.

Embodiment 2 A second embodiment will be described with reference to FIG. The basic configuration is almost the same as that of the first embodiment, but includes a phase angle detection unit 27 for detecting a phase control value of the first phase control unit 14, and first and second current setting units 28 and 29. The current setting value of the constant current control can be set in two stages by the value of the phase angle of the first phase control means 14.

The operation of the above configuration is as follows. In an area where the amount of dust collected by the vacuum cleaner is small and the air volume is relatively large, the constant current control of the power consumption of the electric blower 2 is performed at the current value I1 set by the first current setting means 28. When the amount of dust collection increases and the amount of incoming air decreases, the output phase value of the first phase control means 14 decreases for 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 operation is performed so that constant current control is further performed at 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 phase cut amount is large and the current value is small, such as when the phase value set by the power setting means 26 is weak or during middle operation, the current detection means 11 is not limited and the phase according to the phase value set by the power setting means 26 is not applied. In the case of a strong operation, the current limit is applied and the upper limit current value is controlled in two stages of I1 and I2.

(Embodiment 3) A third embodiment will be described with reference to FIG. The basic configuration is almost the same as that of the second embodiment, but has a pressure detecting means 30 in the cleaner body, and the current setting value of the 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 cleaner is small and the pressure inside the cleaner is relatively small, the power consumption of the electric blower 2 is reduced to the first.
The constant current control is performed at 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 operation is switched to the current value I2 set by the means 29, and the constant current control is further performed at 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 phase cut amount is large and the current value is small, such as when the phase value set by the power setting means 26 is weak or during middle operation, the current detection means 11 is not limited and the phase according to the phase value set by the power setting means 26 is not applied. The current limit is applied during strong operation, and the upper limit current value is I2 or I2 depending on the pressure set value P1.
It shows a state of being controlled in stages.

(Embodiment 4) A fourth embodiment will be described with reference to FIG. 9 is a hand control unit at the tip of the hose 4. In the main body controller 8, the electric blower 2, the bidirectional thyristor 10, and the current detecting means 11 are connected in series to a commercial power supply. Current detection means 11
Is rectified by the rectifier 12 and then smoothed by the capacitor 13 and input to the A / D terminal of the microcomputer 31. The resistor 15 is a load resistor that determines the output of the current detecting means 11. Further, the microcomputer 31 is connected to a first AC synchronizing signal generating means 18 from a first DC power supply 17 connected to a commercial power supply, and is input to the microcomputer 31 as a reference signal for phase control. . Further, a phototransistor 33 and the second photocoupler 22 of the hand control unit 9 are connected in series to both ends of the commercial power supply via 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 via a current limiting resistor 35 between T2 and the gate terminal of the bidirectional thyristor 10. An input terminal of the photocoupler 36 is connected to an output terminal of the microcomputer 31 via a limiting resistor 37 so as to be able to control the power of the electric blower 2.

The operation of the above configuration 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
, The load current of the electric blower 2 is directly detected, and the self-correction is performed by the phase control 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 flow and maintaining and improving the performance. Acts to achieve.

FIG. 9 shows an electric blower 2 according to a fourth embodiment.
The relationship between the power consumption and the air flow is shown. In the figure, when the phase cut amount is large and the current value is small, such as when the phase value set by the power setting means 26 is weak or during middle operation, the current detection means 11 is not limited and the phase according to the phase value set by the power setting means 26 is not applied. Although the power is controlled by the value, the power consumption of the electric blower 2 is continuously increased with the decrease in the air flow during the strong operation and the airflow is reduced, and the self-correction is performed.

Fifth Embodiment A fifth embodiment will be described with reference to FIG. The system configuration of this embodiment is the same as that of the fourth embodiment.

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

Embodiment 6 A sixth embodiment will be described with reference to FIG. The system configuration of this embodiment is the same as that of the fourth embodiment.

The operation of the above configuration is as follows. Until the load current of the electric blower 2 reaches the lower limit current set value I1, control is performed at a predetermined constant phase value. When the load current reaches the lower limit current set value I1, the load current is corrected to the upper limit current set value I2, and then the motor is operated 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.

[0030]

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

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

In addition, by performing self-correction of the load current of the electric blower by the microcomputer, it is possible to continuously correct performance degradation due to a change in air volume and to maintain and improve performance.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a control device of the vacuum cleaner according to the first embodiment of the present invention.

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

FIG. 4 is a block diagram of a control device for a vacuum cleaner according to a second embodiment of the present invention.

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

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

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

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

FIG. 9 is a diagram showing power consumption vs. air flow of the electric blower.

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

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

[Explanation of symbols]

 Reference Signs List 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

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47L 9/28

Claims (3)

(57) [Claims] An electric blower is provided on a main body of the electric vacuum cleaner,
The current detection means of the blower, the first and second sets the upper limit current
And second current setting means, and load current of the current detection means.
Current does not exceed the upper limit current of the first and second current setting means.
First phase control means for controlling the phase
The operation unit has a power setting means for the electric blower and a power control signal transmission.
And a phase angle detecting means for detecting a phase control amount of the electric blower, and a phase set by the power setting means.
The electric power of the electric blower is controlled by the phase value of the phase control, and the load current of the electric blower is directly detected by the current detecting means.
The phase angle detected by the phase angle detecting means.
Switch the first and second current setting means, and
The first phase control so as not to exceed the upper limit current value of the setting means.
A vacuum cleaner control device that performs two-stage constant current control by means. 2. A vacuum cleaner main body to the electric blower, feeding the electric
The current detection means of the blower, the first and second sets the upper limit current
And second current setting means, and load current of the current detection means.
Current does not exceed the upper limit current of the first and second current setting means.
First phase control means for controlling the phase
The operation unit has a power setting means for the electric blower and a power control signal transmission.
And pressure detecting means in the cleaner body,
While controlling the power of the electric blower with the phase value of the phase control set by the power setting means, the current detection means
The load current of the electric blower is directly detected, and the pressure detection means
The first and second current setting means according to the pressure value detected in
Does not exceed the upper limit current value of the switched current setting means
As described above, the control device for the electric vacuum cleaner performs two-stage constant current control by the first phase control means . 3. The electric vacuum cleaner main body has an electric blower, a phase control means by a microcomputer, and a current detecting means of the electric blower, and a phase control signal from a hand operation section is inputted to the microcomputer to reduce the power consumption of the electric blower. controls, the load current of the electric blower is directly detected by the current detection means, constitute a load current to the upper limit set value of the load current set by the microcomputer to self-correction, before
If the current limit of the current detection means is applied,
The power consumption of the electric blower increases continuously
Control apparatus for an electric vacuum cleaner that was to so that.