JPS58200724A - Control apparatus of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a vacuum cleaner, and includes: (tl) controlling the suction air volume of a vacuum cleaner by detecting the suction pressure of a remover and the voltage applied to a motor of an electric blower; With the goal.

In modern vacuum cleaners, the motor Ω control was controlled in two ways, on and off by a switch, and the output of the vacuum cleaner was always at its maximum during cleaning. Therefore, when there is no load on the vacuum cleaner, for example, when the vacuum cleaner is not cleaning, such as when the vacuum cleaner is floating in the air, the electric motor operates at maximum output and wastes electricity. Many things happened. The type of load: floor, tatami, carpet.

There is a vacuum cleaner output that is suitable for each surface to be cleaned, such as curtains, etc., and using a vacuum cleaner at a fixed maximum output regardless of the surface to be cleaned is wasteful in terms of electricity, and it is not useful in terms of operability. It was a terrible thing. Therefore, in conventional vacuum cleaners.

Some vacuum cleaners were equipped with a volume or the like in the switch section, allowing the output of the vacuum cleaner to be varied by manual switching, but these were difficult to use because they were operated manually. There is also a type of vacuum cleaner that detects the pressure inside the vacuum cleaner, controls the electric motor so that the pressure at the detection part is constant, and changes the output according to the load of the vacuum cleaner. Vacuum cleaners have a maximum output when there is no load, and a low output when there is a heavy load, so they have poor dust absorption effects and little energy-saving effect. There are also vacuum cleaners that detect the suction air volume within the vacuum cleaner and control the suction air volume. However, it is not easy to detect the airflow inside a vacuum cleaner, and the conventional method was to install an obstacle such as a wind catcher in the ventilation path and detect the airflow based on the movement of the wind catcher. Since the air volume detection means has a mechanically moving part, the frictional resistance of the movable parts cannot be ignored, the response to minute changes in air volume is poor, and the output with respect to the air volume has hysteresis. was.

In view of the above drawbacks, the present invention makes it possible to easily detect the suction air volume of a vacuum cleaner, and also controls the suction air volume of the vacuum cleaner to the optimal suction air volume according to the load, thereby reducing unnecessary output. The purpose of the present invention is to realize a vacuum cleaner with low ineffective power consumption.

Examples thereof will be described below with reference to the accompanying drawings.

FIG. 1 is a characteristic diagram showing the suction pressure and suction air volume of a vacuum cleaner and the applied voltage of the electric motor. The operating principle of the present invention will be briefly explained using FIG. 1. The horizontal axis of the graph is the motor applied voltage, the vertical axis is the suction pressure in front of the blower fan in the main body of the vacuum cleaner, and Ql to Q5 are the cleaning when the motor applied voltage and suction pressure in 10 are plotted on the horizontal and vertical axes. This is the equal suction air volume line of the machine. In normal use of a vacuum cleaner, the equal suction air volume lines are almost straight lines, and the intervals between the equal suction air volume lines are also equal. Therefore, the suction air volume Q is
Determined from suction pressure H and motor applied voltage vm, Q=f
(Vm, H), and the following equation holds true.

Q=α・V, +β・H+γ Here, α, β, and γ are constants.

As described above, in a vacuum cleaner, the suction air volume can be detected by detecting the voltage applied to the motor and the suction pressure. In this case, it is generally difficult to directly detect the suction air volume, but it is relatively easy to detect the suction pressure and the voltage applied to the motor. Therefore, according to the present invention, it is possible to detect the air volume of a vacuum cleaner using a relatively easy method.

FIG. 2 is a concrete block diagram in one embodiment of the present invention. In the figure, 1 is a motor for an electric blower, 2 is a motor applied voltage detection device (hereinafter referred to as a voltage detection device) that outputs an output proportional to the voltage applied to the motor 1, and 3 is a device that detects the suction pressure of a vacuum cleaner and detects the pressure. A pressure sensing device that outputs a proportional output; 4 is an arithmetic device that inputs the outputs of the pressure sensing device 3 and the voltage sensing device 2, performs calculations, and outputs the results; 5;
is an electric blower control device (hereinafter referred to as a control device) that changes the voltage applied to the electric motor 1 based on the output of the arithmetic device 4 and controls the output of the electric motor 1. If the output of the voltage detection device is vm and the output of the pressure detection device 3 is vp, the relationship between s vm, vp, and the suction air volume is as shown in Figure 1, and the suction air volume Q is Q=a-VB+b-v It can be found by +C. Here, a, b, and c are constants, which are fixed depending on the characteristics of the vacuum cleaner. Therefore, input by the arithmetic device 4 is vp and Vmwo, Q-a-vm+b-vp+
If the calculation C is performed and the result is output, the calculation device 4 will output an output proportional to the intake air volume. In this way, the voltage detection device 2, the pressure detection device 3, and the calculation device 4 constitute a suction air volume detection device. A control device 6 controls the output of the electric motor 1 according to the output of the arithmetic device 4 so that the suction air volume of the vacuum cleaner becomes a suction air volume suitable for the load.

According to the above configuration, it is possible to control the suction air volume of the vacuum cleaner, and the pressure detection device 3 can be easily configured with a semiconductor pressure sensor or the like, and does not have a mechanically movable part. Therefore, a highly reliable vacuum cleaner control device can be constructed.

FIG. 3 is a simplified block diagram of yet another embodiment of the invention. In the figure, 1 to 5 are the same as the embodiment shown in FIG. 2, 6 is a detected pressure calculation amplification device (hereinafter referred to as pressure calculation device) that calculates and outputs the output value of the pressure detection device 3, and 7 is a voltage detection device. 2 is an applied voltage calculation amplification device (hereinafter referred to as applied voltage calculation device) which calculates and outputs the output value; 8 compares the output values of the pressure calculation device 6 and the applied voltage calculation device 7, and calculates a value proportional to the difference; An output comparison calculation device 5 inputs the output of the comparison calculation device 8 and controls the output of the motor so that the difference between the outputs of the pressure calculation device 6 and the applied voltage calculation device 7 becomes 0. It is a device. In the above configuration, there is a relationship between the vacuum cleaner's suction pressure, suction air volume, and motor applied voltage as shown in FIG. Output v
Q=a − as in the embodiment shown in FIG.
There is a relationship of Vplb - Vm0G. If the output is controlled so that the suction air volume of the vacuum cleaner is always constant, and the optimal suction air volume value for efficient cleaning is 90, then the vacuum cleaner will have a suction air volume of QC regardless of the load. The following formula always holds true while driving.

Q - (a · Vplb - Vm4 - C) =.

In other words, the pressure calculation device 6 calculates 1/a on the input value and outputs it, and the applied voltage calculation device 7 calculates v, + (0-Q.) )/b for the input value vm. It outputs the results. Therefore, the output of the pressure calculation device 6 is set to v, 1. If the output of the applied voltage calculation device 7 is -1, if the vacuum cleaner has a suction air volume of Qc regardless of the load, then
The following formula holds true.

vPI ’ml=.

The comparison calculation device 8 outputs a value proportional to the difference between vpl and Vml, and the control device 5 adjusts the output of the pressure calculation device @ 6 and the applied voltage calculation device 7, so that vpl and vmt become Vpl:Vml. It controls the output, v1ml
If the value of 'pl is a positive value, the output of the electric motor 1 is increased. In this way, in the configuration shown in FIG.
By performing control so that the difference in output is always 0,
It is possible to configure a constant suction airflow control device for a vacuum cleaner that maintains the suction air volume of the vacuum cleaner at a constant value of Qo. Furthermore, in the case of , the arithmetic unit 4 is highly practical in that it can be constructed from a simple +1-t amplifying device and a comparison arithmetic device.

FIG. 4 is a specific circuit diagram of still another embodiment of the present invention. In the figure, 1 and 3 to 8 are the third
It is the same as the embodiment shown in the figure, with 9 AC power supplies, 10 a bidirectional three-terminal thyristor for controlling the voltage applied to the motor 1, and 11 a thyristor 4f for setting the output of the ratio 1-bit operation device 8 to 0. A gate control device 12 for controlling the gate of the terminal thyristor is an applied voltage detection device that detects a voltage proportional to the voltage applied to the motor by detecting the voltage across the ball terminal thyristor 10. In the above configuration, the applied voltage detection device 12 differs from the embodiment shown in FIG. 3 in that it does not directly detect the applied voltage of the motor 1 but detects the voltage across the three-terminal thyristor 1o, but is similar in other respects. be. The voltage applied to the motor 1 and the voltage between the anode and the cathode of the bidirectional three-terminal thyristor 1o have a correlation, and when corrected by calculation, the voltage applied to the motor can be obtained from the three-terminal thyristor applied voltage. Therefore, even without directly detecting the voltage applied to the motor 1, by detecting the voltage across the bidirectional two-terminal thyristor 10 and performing calculations, it is possible to obtain an output proportional to the voltage applied to the motor. The applied voltage detection device 12 detects the applied voltage of the bidirectional three-terminal thyristor 10, but since it outputs an output proportional to the applied voltage of the motor 1, this output, the output of the pressure detection device 3, and the suction air volume are as shown in FIG. Similar to the example in
The relationship is shown in FIG. Therefore, as in the embodiment shown in FIG. 3, the difference between the outputs of the pressure calculation device 6 and the applied voltage calculation device 7 is 0 according to the calculation results of the pressure calculation device 6, the applied voltage calculation device 7, and the comparison calculation device 8. The suction air volume of the vacuum cleaner can be appropriately controlled to a constant value of Q0 by using the gate control device 11 to control the gate of the r'7 J-tropic three-terminal zyristor as much as possible. can be done.

In this way, with the configuration shown in FIG. 4, a vacuum cleaner with a constant suction air volume can be realized. Moreover.

In this case, the voltage detection device does not directly detect the voltage applied to the motor, but indirectly, so it does not have any effect on the motor.
It is excellent in that it can be detected without causing a problem.

As described above, according to the present invention, the suction air volume of a vacuum cleaner can be detected by a relatively easy method, and since the suction air volume detection part can be constructed without including a mechanical operating part, it is possible to It becomes possible to obtain products with high precision and excellent stability. Furthermore, when a vacuum cleaner is operated with an appropriate constant suction air volume, highly accurate control can be performed, so regardless of the load condition, the vacuum cleaner will always perform cleaning with the optimal output for the load. be able to.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the relationship between suction pressure, suction air volume, and voltage applied to a motor in a vacuum cleaner, Fig. 2 is a block diagram of one embodiment of the present invention, and Fig. 3 is a block diagram of yet another embodiment of the present invention. , FIG. 4 is a block diagram of still another embodiment of the present invention. 2...Motor applied voltage detection device, 3...
・Pressure detection device, 4... Arithmetic device, 6...
...Electric blower control device, 6...Detection pressure calculation amplification device, 7...Applied voltage calculation amplification device, 8.
... Comparison calculation device, 1o ... Motor applied voltage detection device. Name of agent For patent attorney: Uneo Nakao and 1 other person 1st
Image quality dynamic S unit applied voltage y. Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A pressure detection device for detecting suction pressure, a motor applied voltage detection device for detecting the voltage applied to the electric blower motor, and an output of the pressure detection device and an output of the motor applied voltage detection device. A control device for a vacuum cleaner, comprising: a calculation device for manually performing calculations and detecting a suction air volume from the calculation results; and an electric blower control device for controlling the output of a motor for an electric blower based on the output of the calculation device. . (2) Calculation mounting includes a detected pressure calculation amplification device for calculating and amplifying the output value from the pressure detection device and an applied voltage calculation amplification device for calculating and amplifying the output value from the applied voltage detection device. and a comparison calculation device for comparing the output of the detected pressure calculation amplification device and the output of the applied voltage calculation amplification device, and the control device N includes the detected pressure calculation amplification device 11f1 and the applied voltage 2. The vacuum cleaner control device according to claim 1, wherein the vacuum cleaner control device is configured to control the voltage applied to the electric blower motor so that the difference between the calculation results of the calculation amplification device always becomes a set value.