JP2739116B2 - How to control a vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an electric vacuum cleaner, and more particularly, to an electric blower that detects a suction force inside a vacuum cleaner and, based on the detection signal, detects the suction force. The present invention relates to a method of controlling a vacuum cleaner for controlling an input of a vacuum cleaner. [Prior Art] Prior to the description of the present invention, a power control system of a conventionally proposed vacuum cleaner will be described by taking the case of Japanese Patent Publication No. 60-53622 as an example. Two points (Q ₁ , Q ₂ ) are set for the air volume for input control. When the air volume Q ₁ is large (Q> Q ₁ ), the input is reduced, and when the air volume Q is small (Q <Q ₂ ), A vacuum cleaner is shown that increases the input and thus controls the input of the electric blower. [Problems to be Solved by the Invention] However, in the vacuum cleaner disclosed in Japanese Patent Publication No. 60-53622, the air volume at the maximum suction power is not recognized, and the maximum suction power is not recognized. If Q ₁ <Q _P with respect to the air volume Q _P at the time, the input at the maximum suction power is reduced, the required suction force cannot be obtained, and the air volume Q _P at the maximum suction power is reduced. On the other hand, if Q ₂ > Q _P , there is room for improvement in that the input at the maximum suction power is increased, so that more input is consumed than necessary and wasteful energy is wasted. The present invention has been made as a result of a review of the power control system of a vacuum cleaner,
It is an object of the present invention to provide an improved method of controlling an electric vacuum cleaner which is excellent in responsiveness and stability of operation, greatly contributes to energy saving, has a simple structure and is inexpensive in product cost. [Means for Solving the Problems] In order to achieve the above object, the present invention is characterized in that a cleaner main body having a built-in dust collecting filter and an electric blower, and a flow rate in the cleaner main body are detected. One air volume sensor, a control method of a vacuum cleaner having a control device that controls the input of the electric blower based on the detection signal of the air volume sensor, as a boundary with the air volume almost corresponding to the suction power maximum, When a first reference air volume and a second reference air volume are set for a side where the air volume is large and a side where the air volume is small, respectively, when a detected air volume detected by the air volume sensor becomes larger than the first reference air volume Or when the airflow becomes smaller than the second reference airflow, the control is performed so as to reduce the input of the electric blower. Further, the features of the present invention are based on a cleaner main body having a built-in dust collecting filter and an electric blower, a pressure sensor for detecting a pressure in the cleaner main body, and a detection signal of the pressure sensor. A control method for an electric vacuum cleaner having a control device for controlling an input of an electric blower, comprising a boundary at a pressure substantially corresponding to the suction power at the maximum, and a second pressure on each of a side where the pressure is large and a side where the pressure is small. A first reference vacuum degree and a second reference vacuum degree are set, and when the pressure detected by the pressure sensor is higher than the first reference vacuum degree, or when the pressure is higher than the second reference vacuum degree. In any of the cases when the size of the electric blower is reduced, the input of the electric blower is controlled to be reduced. [Operation] That is, in the present invention, in consideration of the suction force and the operability of the vacuum cleaner, two points of an appropriate air volume or vacuum degree are set and set as a reference air volume or reference vacuum degree. Next, the airflow or pressure inside the cleaner is detected by one sensor, and the airflow or pressure is compared with a reference airflow or vacuum degree. At this time, the determination criteria of the comparator that performs the comparison determination are set in two stages, and the outputs are independently fed back to the power control circuit of the electric blower according to the two points of reference air volume or reference vacuum. The input control of the electric blower within the specified range can be performed with the reference airflow or the reference vacuum at the two points as a boundary. [Embodiment] Hereinafter, the present invention will be described with reference to one embodiment of the drawings. FIG. 1 is a block circuit diagram showing an operation system of the vacuum cleaner of the present invention, and FIG. 2 shows an internal structure of the cleaner body. Longitudinal section,
FIG. 3 is a perspective view showing the overall configuration of the vacuum cleaner, and FIG. 4 is an air volume-pressure characteristic diagram of the vacuum cleaner of the present invention. In FIG. 2 showing the internal structure of the cleaner main body, reference numeral 1 denotes an electric blower, and the electric blower 1 is located on the rear surface of the filter 3 and fixed to the main body case 2. As shown in FIG. 3, one end of a hose 4 is attached to the suction port 2a of the main body case.
Is connected to the other end of the extension pipe 5, and a suction port 6
And a sensor 7 is provided in the ventilation path of the suction port 6 as shown in FIG. In the above configuration, when the vacuum cleaner is operated with the switch turned on, dust sucked from the suction port 6 passes through the extension pipe 5 and the hose 4, enters the main body case 2 from the suction port 2 a, and is filtered by the filter 3. Only the filtered and clean air is discharged from the exhaust port 2b through the electric blower 1. If the suction port 6 is blocked by a curtain or sucks on the floor, for example, the air volume Q inside the cleaner is Q <Q <in the air volume Q-pressure H characteristic shown in FIG.
Q _2, and the relative output of the sensor indicated by reference numeral 7 in FIG. 1, the output of comparator 8 exceeds the reference potential, it contains the output signal to the power control circuit 10 via the diode 15, the current control element 11 Decrease the output current. In FIG. 1, 17
Is a variable resistor for adjustment, and 18 is a capacitor. Therefore, the time for the trigger element 12 to transmit the trigger signal to the gate terminal G of the bidirectional semiconductor element 13 via the pulse transformer 14 is delayed, and the phase angle is reduced. . Also, in FIG.
Is a protective resistor, and 20 and 21 are voltage dividing resistors that define the characteristics of the trigger element 12. Therefore, the input of the electric blower 1 is reduced, and the suction between the suction port 6 and the curtain or floor is weakened. Operability of the mouthpiece 6 is improved. The power control circuit indicated by reference numeral 10 in FIG. 1 is operated by a power supply circuit including a power supply transformer 22, a rectifying element 23, a current limiting resistor 24, and a constant voltage diode 25. Next, the air volume when the suction port 6 is lifted into the air is Q> Q.
_{As a result} , the output of the comparator 9 decreases the current of the current control element 11 in the power control circuit 10 via the diode 16 and the input of the electric blower 1 can be reduced as described above. Then, as shown in FIG. 4, the set value of the air volume for input control of the electric blower 1 is changed to the air volume Q _P at the maximum suction power.
If Q ₁ > Q _P > Q ₂ , the operability when the suction port 6 of the vacuum cleaner is attached to a curtain, a floor, or the like is improved, and the suction port 6 is placed in the air. When it is lifted, the necessary and sufficient suction force is obtained at Q _P ,
In Q> Q _1, it is possible to avoid the consumption of extra energy. Moreover, when Q <Q ₂ , only the comparator 8 outputs an output signal, and the comparator 9 does not operate. This is because the reference potentials are set to appropriate values by appropriately setting the values of the resistors R ₈ and R ₉ according to the output of the sensor 7. Similarly, the Q> QC _1, only the comparator 9 issues an output signal, the comparator 8 does not operate. Also, Q ₂ <
Q <In Q _1, it does not operate both comparators 8 and 9, the power control circuit 10
Does not depend on the output of the sensor 7, the input of the electric blower 1 does not change. That is, two regions of Q> Q ₁ and Q <Q ₂ can be controlled by one sensor 7. In other words, complicated control can be performed by one sensor 7, so that the structure of the vacuum cleaner can be simplified and the cost can be reduced. In the above embodiments, an emphasis on operability of the vacuum cleaner mouthpiece 6, in Q <Q _2, has been illustrated for the case where the lower the input of the electric blower 1, increases the dust collecting force of the vacuum cleaner for the purpose of to, in Q <Q _2, it may be to increase the input of electric blower 1. In this way, if the filter 3 becomes Q <Q ₂ and clogged by dust, the suction force of the vacuum cleaner by an input increase in electric blower 1 is increased, but also the conventional suck a large amount of dust The filter 3 can be cleaned and replaced less frequently. [Effects of the Invention] As described above, according to the present invention, dust can be sucked in efficiently because the input power applied to the electric blower at the time of maximum suction power is not reduced. Further, for example, when the mouthpiece is away from the floor, it is possible to suppress the consumption of extra power.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a vacuum cleaner according to the present invention,
FIG. 2 is a block circuit diagram showing an operation system of the vacuum cleaner of the present invention, and FIG.
FIG. 3 is a vertical sectional view showing the internal structure of the cleaner body, FIG. 3 is a perspective view showing the overall structure of the cleaner, and FIG. 4 is a flow rate-pressure characteristic diagram of the cleaner of the present invention. DESCRIPTION OF SYMBOLS 1 ... Electric blower, 2 ... Body case, 3 ... Filter, 6 ... Suction, 7 ... Sensor, 8 and 9 ... Comparator, 11 ... Current limiting element, 12 ... Trigger element, 13 ... ... bidirectional semiconductor element, Q _P ...... suction work rate up to the time of air volume.

Claims (1)

(57) [Claims] A vacuum cleaner body having a built-in dust collecting filter and an electric blower, one airflow sensor for detecting the airflow inside the cleaner body, and a control device for controlling the input of the electric blower based on a detection signal of the airflow sensor. A method of controlling a vacuum cleaner, comprising: setting a first reference air flow and a second reference air flow on a side where an air flow is large and a side where a air flow is small, with a boundary of an air flow substantially corresponding to a maximum suction power. The electric blower is set when the detected airflow detected by the airflow sensor becomes larger than the first reference airflow or when the airflow becomes smaller than the second reference airflow. A method for controlling an electric vacuum cleaner, wherein the control is performed so as to reduce the input of the vacuum cleaner. 2. A cleaner body incorporating a dust collecting filter and an electric blower, a pressure sensor for detecting pressure in the cleaner body, and a control device for controlling an input of the electric blower based on a detection signal of the pressure sensor. A method of controlling a vacuum cleaner, comprising: a first reference vacuum degree and a second reference vacuum on each of a side where the pressure is high and a side where the pressure is low, with a boundary corresponding to a pressure substantially corresponding to a maximum suction power. Degree, when the detected pressure detected by the pressure sensor is larger than the first reference vacuum degree, or when the pressure is smaller than the second reference vacuum degree, And controlling the electric blower so as to reduce the input of the electric blower.