KR100239162B1 - Method and apparatus for controlling force of suction in vacuum cleaner - Google Patents

Abstract

The present invention relates to a suction force control apparatus and method of the vacuum cleaner, the vacuum cleaner for transferring the dust or foreign matter sucked by the suction power of the suction motor through a pipe member to be collected in the dust bag, the drive of the vacuum cleaner And an operation unit for adjusting the suction force, a suction force detection unit installed at a predetermined portion of the pipe member to detect suction force in the pipe member, suction force detected by the suction force detection unit, and suction force adjusted by the operation unit. Consists of a control unit for adjusting the rotational force of the suction motor, and a suction motor driving unit for driving the suction motor in accordance with the rotational force adjusted by the control unit, and rotates by external air introduced through a hole formed in a predetermined portion of the pipe member. According to the rotating speed of the fan and the suction speed selected by the control unit By adjusting the rotational force of the suction motor to maintain a constant suction force in the pipe member, it can be expected power saving effect.

Description

Suction force control device of vacuum cleaner and its method

The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner capable of adjusting the suction force in a pipe member by detecting a rotational speed (RPM) of a fan rotated by external air introduced through a hole formed in a predetermined portion of the pipe member. It relates to a suction force control device and a method thereof.

In general, the main components of the vacuum cleaner, as shown in Figure 1, the suction device having a suction surface to suck the dust or foreign matter, etc. by the suction force of the air, and the suction device 100 The communication device 200 serves as a passage so as to smoothly transport the dust to the collecting place, and the main body 300 to collect the dust transported by the communication device 200.

The suction device 100 is composed of two first transfer member 110 installed on both sides, and a connecting pipe 120 formed integrally with the rear upper end of the upper cover and connected to the communication device 200. .

In addition, the communication device 200 includes a pipe member 210 including a first pipe member 211 and a second pipe member 212 made of a plastic material connected to communicate with a hollow portion of the connection pipe 120; The handle member 220 is coupled to the pipe member 210 and 220, and the suction hose 230 is coupled to communicate with the handle control unit 220, as well as the natural bending. The knob control unit 220 is provided with a power switch for operating the power (ON) / off (OFF) or a wind speed control switch for adjusting the suction pressure for the air, as well as the electrical signal in accordance with the switch operation The operation unit 221 for converting, and the transmission unit 222 for converting the electrical signal converted by the operation unit 221 to a corresponding wireless signal (for example, infrared signal) and transmits to the outside is provided have.

In addition, the main body 300 includes a hose connector 310 connected to the end of the suction hose 230, a receiver 320 for receiving an infrared signal transmitted from the transmitter 222, and the dust collected A dust indicator 330 for indicating the amount of water, two second transfer wheels 340 installed at both sides, a transport handle 350 which allows an operator to easily transport the work place, and the It is composed of a power plug 360 for supplying power to the main body 300.

On the other hand, the inside of the main body 300, as shown in Figure 2, through the suction device 100 and the communication device 200, a dust bag for collecting dust or foreign matter sucked into the main body 300 ( A dust collecting chamber 370 in which 371 is provided is formed, and a suction motor 380 is installed at the rear side of the dust collecting chamber 370 to generate suction force to suck dust or foreign matter.

The rotary shaft of the suction motor 380 is provided with an impeller 390 that rotates when the suction motor 380 is driven, and absorbs vibration generated by the suction motor 380 before and after the suction motor 380. The front dustproof material 391 and the rear dustproof material 392 to suppress the noise caused by the vibration is installed, the rear side of the suction motor 380, the power cable 400 is drawn out or drawn in when the main body 300 is moved You are wounded.

In the vacuum cleaner configured as described above, the user pulls out the power plug 360 from the main body 300 and connects it to an outlet (not shown), and then turns on the power switch provided in the operation unit 221 of the handle adjusting unit 220. Then, power is applied to the suction motor 380 installed in the main body 300 to drive the suction motor 380.

When the suction motor 380 is driven, the impeller 390 coupled to the rotary shaft of the suction motor 380 is rotated at a high speed while the dust or foreign matter of the cleaning part is sucked through the suction device 100 by a strong vacuum suction input. The dust or foreign matter sucked through the suction device 100 is collected in the dust bag 371 installed in the dust collecting chamber 370 through the communication device 200 and is cleaned.

However, in the conventional vacuum cleaner, the user operates the wind speed control switch of the operation unit 221 to drive the suction motor 380 at a reference speed according to the selected suction force, so that the pipe according to the size of the dust and the amount of dust The suction force in the member 210 is changed, there is a problem that it is difficult to implement a constant suction force.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the rotational speed of the fan rotated by the external air flowing through the hole formed in the predetermined portion of the pipe member and the rotational speed according to the suction force selected by the operation unit The purpose of the present invention is to provide a suction force control device and a method of a vacuum cleaner that can maintain a constant suction force in the pipe member by adjusting the rotational force of the suction motor and expect a power saving effect.

In order to achieve the above object, the suction force control apparatus of the vacuum cleaner according to the present invention, in the vacuum cleaner for transferring the dust or foreign matter sucked by the suction force of the suction motor through the pipe member to collect in the dust bag, wherein An operation unit for adjusting a driving force and a suction force of the vacuum cleaner, a suction force detection unit installed at a predetermined portion of the pipe member to detect suction force in the pipe member, and a suction force detected by the suction force detection unit and adjusted by the operation unit Comparing the suction force, and characterized in that the control unit for adjusting the rotational force of the suction motor, and the suction motor driving unit for driving the suction motor in accordance with the rotational force adjusted by the control unit.

In addition, the suction force control method of the vacuum cleaner according to the present invention is a vacuum cleaner for transporting dust or foreign matter sucked by the suction force of the suction motor through a pipe member and collecting the dust in a dust bag. The pipe member by detecting the rotational speed of the fan rotated by the external air flowing through the hole when the suction motor is driven to generate a suction force in accordance with the suction force adjustment step of adjusting the suction force and the suction force adjusted in the suction force adjustment step The suction force control step of maintaining the suction force in the pipe member by adjusting the rotational force of the suction motor by comparing the suction force sensing step for detecting the suction force and the suction force detected in the suction force detection step and the suction force adjusted in the suction force adjustment step. Characterized in consisting of steps.

1 is a perspective view showing a general vacuum cleaner,

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a schematic cross-sectional view of the main components according to the present invention;

4 is a control block diagram of a suction force control apparatus for a vacuum cleaner according to an embodiment of the present invention;

Fig. 5 is a flowchart showing the suction force control operation procedure of the vacuum cleaner according to the present invention.

<Explanation of symbols for main parts of the drawings>

100: suction device 210: pipe member

221: control panel 300: main body

371: dust bag 380: suction motor

390: impeller 420: fan

430: rotation speed detection unit 450: suction force detection unit

460 control unit 470 suction motor drive unit

480: display unit

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Since the vacuum cleaner according to the present invention is the same as the conventional configuration shown in Figs. 1 and 2, the same name and the same reference numeral are specified to omit overlapping description.

As shown in FIG. 3, one side of the pipe member 210 including the first pipe member 211 and the second pipe member 212 is provided with a hollow portion of the pipe member 210 through an air discharge hole 411. The air chamber 410 is in communication with the outside through the air inlet hole 412 and the air inlet 412 is formed, the suction motor 380 is driven in the air chamber 410 when inhaling the outside air The fan 420 rotated using the outside air sucked to one side of the air chamber 410 by the pressure difference between the hollow portion 215 and the outside of the pipe member 210, the rotation of the fan 420 Suction force detection unit 450 is provided which consists of a rotation speed detection unit 430 for detecting the number and measuring the suction force in the pipe member (210).

A circuit block diagram for detecting and displaying an amount of dust of the vacuum cleaner configured as described above will be described with reference to FIG. 4.

As shown in FIG. 4, the power supply unit 440 converts a commercial AC voltage input from an AC power supply terminal (not shown) into a predetermined DC voltage required for driving the vacuum cleaner, and outputs the operation unit 221 of the vacuum cleaner. It is provided with a power switch for operating the power (ON) / off (OFF) or a wind speed control switch for adjusting the suction pressure to the air, as well as converts the switch operation by the user to a corresponding electrical signal.

Suction force detection unit 450 is installed on a predetermined portion of the pipe member 210 to detect the suction force in the pipe member 210, the suction force detection unit 450 is formed on a predetermined portion of the pipe member 210. The fan 420 is rotated by the external air introduced through the air discharge hole 411, and the rotation speed detection unit 430 for detecting the rotation speed of the fan 420 and input it to the controller to be described later.

In addition, the controller 460 receives the DC voltage supplied from the power supply unit 440 to initialize the vacuum cleaner, and controls the overall operation of the vacuum cleaner according to the switch signal input from the operation unit 221. As a microcomputer, the control unit 460 compares the suction force in the pipe member 210 sensed by the suction force detecting unit 450 with the suction force adjusted by the operation unit 221 and accordingly the suction motor 380 according to the difference. Adjust the torque of).

In addition, the suction motor driver 470 drives and controls the suction motor 380 by receiving a commercial AC voltage input from the AC power source so as to suck in dust or foreign matter in accordance with a control signal from the controller 460. 480 is a dust indicator that displays the amount of dust in the dust bag 371 in accordance with a control signal from the control unit 460.

The rotation speed detection unit 430 detects the rotation speed of the fan 420 and transmits the rotation speed to the control unit 460. The rotation speed detection unit 430 changes when the fan 420 rotates. The Hall sensor 431 for detecting a signal current and the signal current sensed by the Hall sensor 431 through the resistor (R2) is turned on / off to pulse the input terminal (INT) of the control unit 460 A transistor TR1 for outputting a signal and a pulse signal proportional to the rotational speed of the fan 420 at the time of turning on / off the transistor TR1 to an input terminal INT of the controller 460. Resistor R3 and R4 connected to the collector terminal of the transistor TR1 and a resistor connected to the base terminal and the collector terminal of the transistor TR1 so as to maintain a constant current flowing through the base terminal of the transistor TR1. It consists of (R1).

Hereinafter, the effect of the suction force control device of the vacuum cleaner and the method configured as described above will be described.

Fig. 5 is a flowchart showing the suction force control operation procedure of the vacuum cleaner according to the present invention, in which S denotes a step.

First, when the user pulls out the power plug 360 from the main body 300 and connects it to an outlet (not shown), the power supply unit 440 uses a predetermined AC voltage input from an AC power supply terminal (not shown) required to drive the vacuum cleaner. A DC voltage is converted into a DC voltage and output to each driving circuit and the controller 460.

Therefore, in step S1, the DC voltage output from the power supply unit 440 is input from the control unit 460 to initialize the vacuum cleaner.

At this time, the user controls the desired suction pressure (for example, the suction pressure 'medium') by operating the wind speed control switch provided on the operation unit 221 of the knob control unit 220, and then turn on the power switch, The signal is applied from the operation unit 221 to the transmitter 222, and the transmitter 222 encodes a signal corresponding to a switch input by a predetermined protocol, modulates the encoded signal and transmits an infrared signal.

When the infrared signal is transmitted from the transmitting unit 222, the receiving unit 320 of the main body 300 receives the converted signal into an electrical signal, demodulates the converted electrical signal and inputs it to the control unit 460, step S2. Further, the control unit 460 outputs a control signal for driving the suction motor 380 to the suction motor driver 470 according to the operation of the wind speed control switch and the power switch.

Accordingly, the suction motor driver 470 drives the suction motor 380 by receiving a commercial AC voltage input from an AC power source according to a control signal output from the controller 460.

When the suction motor 380 is driven, the impeller 390 coupled to the rotary shaft of the suction motor 380 is rotated at a high speed while the dust or foreign matter of the cleaning part is sucked through the suction device 100 by a strong vacuum suction input. The dust or foreign matter sucked through the suction device 100 is collected in the dust bag 371 installed in the dust collecting chamber 370 through the pipe member 210 and the suction hose 230, and the cleaning is performed.

In this case, a flow of air from the suction device 100 to the dust bag 371 of the main body 300 occurs in the hollow portion 215 of the pipe member 210, whereby external air is introduced into the air inlet hole 412. Inflow through the fan, the fan 420 is rotated by the external air.

Therefore, in step S3, the hall sensor 431 of the rotation speed detection unit 430 detects a signal current that changes when the fan 420 rotates, and outputs a square wave of high or low level, and the hall sensor 431. The square wave output from the control unit 460 is applied to the base terminal of the transistor TR1 through the resistor R2 so that the transistor TR1 is turned on or off and is proportional to the rotational speed of the fan 420. Output to the input terminal (INT).

Accordingly, in step S4, the control unit 460 determines whether the rotation speed of the fan 420 detected by the rotation speed detection unit 430 is greater than the reference rotation speed according to the suction force selected by the operation unit 221, and the detection rotation speed is determined as a reference. If it is greater than the rotation speed (YES), the suction force in the pipe member 210 is determined to be large, and the flow proceeds to step S5, where the controller 460 controls the suction motor driver 470 to reduce the rotational force of the suction motor 380. As the power consumption of the suction motor 380 is reduced, a power saving effect can be expected.

On the other hand, when the determination result in the step S4, when the detection speed is not greater than the reference speed (NO), it is determined that the suction force in the pipe member 210 is small, the flow proceeds to step S6, and the control unit 460 is a suction motor driver ( Since the rotational force of the suction motor 380 is increased by controlling 470, the suction force in the pipe member 210 can be compensated for constantly.

Subsequently, in step S7, it is determined whether the vacuum cleaner is in the end of operation, and when it is not the end of operation (NO), the process returns to the step S2 and repeats the operation of step S2 or less to perform cleaning. Cleaning is stopped (if YES).

According to the suction force control device and method of the vacuum cleaner according to the present invention as described above, the rotational speed of the fan rotated by the external air flowing through the hole formed in the predetermined portion of the pipe member and the suction force selected by the operation unit By adjusting the rotational force of the suction motor according to the number of revolutions according to the rotational force, the suction force in the pipe member is kept constant, as well as the power saving effect can be expected.

Claims (3)

In the vacuum cleaner which transfers the dust or foreign substances sucked by the suction power of the suction motor through the pipe member and collects them in the dust bag. An operation unit for controlling driving and suction force of the vacuum cleaner; A suction force detecting unit installed at a predetermined portion of the pipe member to detect suction force in the pipe member; A control unit for adjusting the rotational force of the suction motor by comparing the suction force detected by the suction force detection unit with the suction force adjusted by the operation unit; The suction force control device of the vacuum cleaner, characterized in that the suction motor driving unit for driving the suction motor in accordance with the rotational force adjusted by the control unit. The method of claim 1, The suction force detecting unit is composed of a fan rotated by the external air introduced through a hole formed in a predetermined portion of the pipe member, and a rotation speed detection unit for detecting the rotational speed of the fan and input to the controller. Suction force control device for vacuum cleaner. In the vacuum cleaner which transfers the dust or foreign substances sucked by the suction power of the suction motor through the pipe member and collects them in the dust bag. A suction force adjusting step of adjusting the suction force of the vacuum cleaner by an operation unit; A suction force sensing step of detecting suction force in the pipe member by detecting a rotational speed of a fan rotated by external air introduced through a hole when the suction motor is driven and generated suction force according to the suction force adjusted in the suction force adjusting step; , The suction force control step of maintaining the suction force in the pipe member because the suction force in the pipe member is adjusted by comparing the suction force detected in the suction force detection step and the suction force adjusted in the suction force adjustment step. Suction force control method.