KR100237048B1 - Apparatus for controlling operation of vacuum cleaner - Google Patents

Abstract

The present invention relates to a driving control apparatus for a vacuum cleaner, wherein a voltage sensing signal corresponding to a voltage level of an external input voltage is output from a voltage sensing unit, and is set from a set suction input set by a user through a time constant adjusting unit and the voltage sensing unit. The time constant is adjusted according to the output voltage sensing signal, and a phase controlled voltage is applied to the motor according to the time constant adjusted by the time constant adjusting unit through the voltage phase control unit, so that the external input voltage matches the rated voltage. Even if not, the pressure switch is operated at the correct time according to the amount of dust collected in the dust collecting chamber so that the suction power compensation operation is normally performed.

Description

Driving control device of vacuum cleaner

The present invention relates to a vacuum cleaner, and more particularly, to adjust the phase of the voltage applied to the motor according to the level of the set suction input and the external input voltage set by the user to perform a suction force compensation operation normally. It relates to a drive control device.

In general, as shown in FIG. 1, the vacuum cleaner includes a suction unit 10 which sucks dust or foreign matter by the suction force of air, and dust which is sucked by the suction unit 10. It consists of a communication unit 20 to be smoothly transferred to the dust collecting chamber built in 30, and the main body 30 to collect the dust moved by the communication unit 20.

Here, the suction unit 10 is composed of two first transfer member 11 provided on both sides, and a connecting tube 12 formed integrally with the rear upper end.

In addition, the communicating portion 20 is a first extension tube 21 and the second extension tube 22 of plastic material coupled to communicate with the hollow portion of the connecting tube 12 and the first and second extension tube 21 ( 22 is coupled to the handle 23 and coupled to communicate with the handle 23, as well as the hose 24 is made of a natural bending.

Here, the handle 23 is provided with a key input unit 40 including a sliding suction force adjusting button 41 for controlling the on / off control of the vacuum cleaner and the suction force of the air.

In addition, the main body 30 has a hose connection port 31 to which the end of the hose 24 is connected, a dust display unit 33 to display the amount of dust collected, and a pair of second transfer wheels provided at both sides ( 34), the carrying handle 35 which can be easily carried by the operator for the movement of the work place, and the power plug 36 which supplies the power are provided.

Here, an impeller (not shown) is provided inside the main body 30 to generate suction force of air by rotation.

Conventional drive control apparatus for driving the vacuum cleaner made as described above is a variable resistor (VR), a pressure switch (PS), a resistor (R), a capacitor (C), a die as shown in FIG. It consists of a Diac, a Triac and a motor M.

In Figure 2, the variable resistor (VR) is to adjust the resistance value according to the operation of the suction force control button 41 of the key input unit 40, the pressure switch (PS) is built in the main body 30 When the internal air pressure (hereinafter referred to as " bet pressure ") of the collected dust chamber rises above the set pressure, it is turned on.

In addition, the diac Diac outputs a pulse signal corresponding to the resistance component of the variable resistor VR and the resistor R and the time constant T of the capacitance of the capacitor C. Triac is to control the phase of the commercial AC voltage according to the pulse signal applied from the Diac, the motor M is a commercial AC voltage whose phase is controlled by the Triac (Triac) ) Is input to rotate the impeller.

The operation process for the drive control device of the vacuum cleaner thus formed is as follows.

In the initial state in which the commercial AC voltage is input from the outside, when the user operates the suction force control button 41 of the key input unit 40 installed in the handle 23, the resistance value of the variable resistor VR is adjusted to the suction force. It is adjusted corresponding to the operation of the button 41.

At this time, a pulse signal corresponding to the time constant T obtained by the following equation 1 from the diac Diac is applied to the gate terminal of the triac Triac.

T [sec] = (VR [Ω] + R [Ω]) C [F]

As described above, the triac triac is operated by a pulse signal applied from a diac, and the phase of the commercial AC voltage applied from the outside through the triac triac is represented by the above equation. It is controlled corresponding to the time constant T obtained by 1 and applied to the motor M. FIG.

Here, the power consumption of the motor M is a value obtained by multiplying the voltage level of the commercial AC voltage whose phase is controlled through the triac Triac with the current value flowing through the winding of the motor M. In M), a rotational force of a speed corresponding to the power consumption as described above is generated to rotate the impeller.

The suction force corresponding to the rotational speed of the motor M is generated in the dust collecting chamber of the main body 30 by the rotation of the impeller as described above, and the external dust is sucked by the suction part 10 and the communication part by the suction force. It is sucked into the dust collecting chamber of the main body 30 through 20 and is collected.

Subsequently, when the user sets the suction force control button 41 of the key input unit 40 to "strongest", the resistance value of the variable resistor VR becomes "0" and is represented by Equation 2 below from Diac. The pulse signal corresponding to the time constant T obtained by this is applied to the gate terminal of the triac Triac.

T [sec] = R [Ω] · C [F]

As described above, the time constant T obtained by Equation 2 is a phase of the commercial AC voltage applied from the outside through the triac Triac operated by the pulse signal applied from the diac. Is controlled correspondingly to the motor (M).

Here, the power consumption of the motor (M) is the largest value (for example, about 1050 [W]) in the normal operation state, that is, the pressure switch PS is not turned on, so that the rotational speed of the motor (M) is The maximum speed is achieved in the normal operation state, whereby the suction force is maximized in the normal operation state.

As described above, when the amount of dust collected in the dust collecting chamber of the main body 30 is greater than the set amount in the situation where the suction force is maximized in the normal operation state, the internal pressure of the dust collecting chamber becomes equal to or higher than the set pressure and the pressure switch PS ) Is turned on.

As the pressure switch PS is turned on, the time constant T becomes "0", and a pulse signal corresponding to the time constant of "0" from Diaac is applied to the triac Triac, and the triac A commercial alternating current AC having an intact phase, i.e., 360 °, is applied to the motor M through Triac.

As described above, the commercial AC voltage having an intact phase of 360 ° through the triac is applied to the motor M, so that the power consumption of the motor M exceeds the power consumption in the normal operation state. It becomes the maximum value (for example, about 1450 [W]), and the rotational speed of the motor M becomes the maximum speed exceeding the speed in the normal operation state, whereby the suction force exceeds the suction force in the normal operation state. Is the maximum value.

Accordingly, the external dust is sucked into the dust collecting chamber of the main body 30 with a stronger suction force exceeding the maximum suction input in the normal operation state.

That is, when the amount of dust collected in the dust collecting chamber of the main body 30 becomes more than the set amount and the dust is not easily sucked by the suction force in the normal operation state, the pressure switch PS is turned on and the suction force is the maximum value. By rising to, the suction force compensation operation is performed to compensate for the lack of suction force in the normal operation state so that the dust is easily sucked.

On the other hand, the set pressure in the dust collecting chamber of the main body 30 that satisfies the operating conditions of the pressure switch (PS) is the key input unit (A) when the commercial AC voltage is rated voltage (for example, about 220 [V]). When the suction force adjusting button 41 of 40 is set to "strongest", the amount of dust collected in the dust collecting chamber of the main body 30 is set to be reached when the set amount is higher than the set amount.

However, in the actual use environment of the vacuum cleaner, the commercial AC voltage does not coincide with the rated voltage and varies more than ± 30 [V] according to the use area or load variation. When the AC voltage is higher or lower than the rated voltage, the pressure switch PS does not operate normally, and the suction force compensation operation may not be performed correctly according to the amount of dust collected in the dust chamber.

For example, when the commercial AC voltage is lower than the rated voltage, the power consumption of the motor M in the state of setting the suction power control button 41 of the key input unit 40 to "strongest" is equal to that of the normal operation state. Since the maximum value (for example, about 1050 [W]) of the suction force does not reach the maximum value in normal operation state, even if the amount of dust in the dust collecting chamber of the main body 30 is higher than the set amount, Since the internal pressure does not reach the set pressure, there is a problem in that the suction force compensation operation is not performed because the pressure switch PS is not turned on.

When the commercial AC voltage is higher than the rated voltage, the power consumption of the motor M is the maximum in the normal operation state with the suction power control button 41 of the key input unit 40 set to "strongest." Since the suction force is larger than the value (for example, about 1050 [W]) and larger than the maximum value in the normal operation state, the dust amount in the dust collecting chamber of the main body 30 is less than the set amount, that is, the suction force compensation operation condition is satisfied. Even when the internal pressure does not reach the set pressure, there is a problem in that the pressure switch PS is turned on early.

Therefore, the present invention has been made to solve the problems of the prior art as described above, by adjusting the voltage applied to the motor according to the level of the set suction input and the external input voltage set by the user, the external input voltage is rated voltage The purpose of the present invention is to provide a driving control device for a vacuum cleaner that can perform a suction force compensation operation by operating a pressure switch at a precise time according to the amount of dust collected in a dust collecting chamber even if the temperature does not coincide with that.

The drive control apparatus for a vacuum cleaner according to the present invention for achieving the above object is a vacuum cleaner for driving a motor to generate a suction force, and using this suction force to collect foreign substances such as dust in the dust collecting chamber, the external input voltage The time constant is adjusted according to the voltage sensing unit for outputting a voltage sensing signal corresponding to the level of the sensor, the set suction input set by the user through the key input unit, the voltage sensing signal output from the voltage sensing unit, and the air pressure in the dust collecting chamber. And a voltage phase control unit for controlling a phase of a voltage input to the motor according to the time constant adjusting unit and the time constant adjusted by the time constant adjusting unit.

1 is a schematic structural diagram of a general vacuum cleaner;

2 is a schematic circuit diagram of a drive control apparatus for a vacuum cleaner according to a conventional example;

3 is a schematic structural diagram of a vacuum cleaner to which the present invention is applied;

4 is a schematic circuit diagram of a driving control apparatus for a vacuum cleaner according to a preferred embodiment of the present invention;

5A to 5D are waveform diagrams for explaining signal input / output relations of main components shown in FIG. 4;

<Explanation of symbols for main parts of the drawings>

500: voltage detection unit 600: time constant adjustment unit

700: voltage phase control unit

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

3 is a schematic structural view of a vacuum cleaner to which the present invention is applied, and the vacuum cleaner to which the present invention is applied includes a suction part 100 and a suction part 100 to suck dust or foreign matter by suction force of air. The communication unit 200 is configured to smoothly transport the dust sucked by the dust collecting chamber built into the main body 300, and the main body 300 to collect the dust moved by the communication unit 200. .

Here, the communication unit 200 is composed of an extension pipe 210 and the handle 220 is coupled to the extension pipe 210, and the hose 230 is coupled to communicate with the handle 220, as well as naturally bent. The handle 220 is provided with a key input unit 400 including a sliding suction force control button 410 for adjusting the on / off control of the vacuum cleaner and the suction force of the air as shown in FIG. have.

In addition, an impeller (not shown) is provided inside the main body 300 to generate suction force by rotation.

4 is a schematic circuit diagram of a driving control apparatus for a vacuum cleaner according to a preferred embodiment of the present invention, a voltage sensing unit 500, a time constant adjusting unit 600, a voltage phase control unit 700, and a motor. It consists of (M).

In FIG. 4, the voltage detector 500 selectively detects a level of a commercial AC voltage input from the outside and selectively outputs high, medium, and low voltage detection signals corresponding to the detected voltage level. It is supposed to.

In addition, the time constant adjusting unit 600 is to adjust a time constant (“T”) of the voltage phase control unit 700 to be described later, and a suction force adjusting button installed in the key input unit 400 ( A variable resistor VR having a variable resistance value according to the operation of 410 and a selective turn-on according to the voltage sensing signals "high", "medium" and "low" input from the voltage sensing unit 500; To the first to third switches SW1 to SW3, the first to third resistors R1 to R3 connected in series to the first to third switches SW1 to SW3, and the main body 300. When the internal pressure of the installed dust collecting chamber is equal to or higher than the set pressure, the pressure switch PS is turned on, and a capacitor C having a predetermined capacitance.

In addition, the voltage phase control unit 700 is to control the phase of the commercial AC voltage, the die to output a pulse signal corresponding to the time constant (T) adjusted by the time constant adjusting unit (600) Triac and a triac configured to control a phase of a commercial AC voltage input to the motor M in response to a diac and a pulse signal output from the diac, according to the time constant T. It consists of Triacs.

In addition, the motor M receives the commercial AC voltage whose phase is controlled by the voltage phase controller 700 to rotate the impeller.

5A to 5D are waveform diagrams for explaining signal input / output relations of the main components shown in FIG. 4, and FIG. 5A shows "time constant (T) = R ₁ C". Is a pulse signal output from the diaac (Diac), Figure 5 (b) is a pulse signal output from the Diaac (Di) when "time constant (T) = R ₂ C", Figure 5 (c) Denotes a pulse signal output from Diac when "Time constant (T) = R ₃ C", and FIG. 5 (d) shows each time constant (T) through the voltage phase control unit 700. It shows the firing angle (fa) of the commercial AC voltage corresponding to the (fa) and the phase accordingly.

An operation example of the present invention having the configuration as described above will be described in detail with reference to FIGS. 3 to 5.

In the initial state, when a commercial AC voltage is input from the outside, a voltage detection signal corresponding to the level of the AC voltage is output from the voltage detector 500 and applied to the time constant controller 600. .

For example, if the commercial AC voltage is less than 190 [V], the voltage detection signal 500 outputs a "low" voltage detection signal, and the commercial AC voltage is 191 [V] to 249 [. V], the voltage sensing unit 500 outputs a "medium" voltage detection signal. If the commercial AC voltage is 250 [V] or more, the voltage sensing unit 500 outputs a "high" voltage sensing signal. Is the output.

As described above, the first to third switches SW1 to SW3 of the time constant adjusting unit 600 are selectively turned on according to the voltage sensing signal applied from the voltage sensing unit 500.

For example, when the "low" voltage detection signal is input from the voltage sensing unit 500, the first switch SW1 is turned on, and when the "medium" voltage sensing signal is input from the voltage sensing unit 500, the second switch is input. When SW2 is turned on and a high voltage detection signal is input from the voltage detector 500, the third switch SW3 is turned on.

At this time, when the user operates the suction force control button 410 of the key input unit 400 installed on the handle 220, the variable resistance (VR) resistance value of the time constant adjusting unit 600 is operated of the suction force control button 410 And a pulse signal corresponding to the time constant T obtained by the following equation (3) from Diac is applied to the gate terminal of the triac Triac.

T [sec] = (VR [Ω] + Rn [Ω]) · C [F]

In Equation 3, Rn is a resistance value of one of R1 to R3.

Here, when the first switch SW1 of the time constant adjusting unit 600 is turned on, "time constant (T) = (VR + R1) C" becomes "correction" when the second switch SW2 is turned on. The number T is equal to (VR + R2) C. If the third switch SW3 is turned on, the time constant T is equal to (VR + R3) C.

As described above, the triac triac is operated by a pulse signal applied from a diac, and the phase of the commercial AC voltage applied from the outside through the triac triac is represented by the above equation. It is controlled corresponding to the time constant T obtained by 3 and applied to the motor M. FIG.

Here, the power consumption of the motor M is a value obtained by multiplying the voltage level of the commercial AC voltage whose phase is controlled through the triac Triac with the current value flowing through the winding of the motor M. In M), a rotational force of a speed corresponding to the power consumption as described above is generated to rotate the impeller.

The suction force corresponding to the rotational speed of the motor M is generated in the dust collecting chamber of the main body 300 by the rotation of the impeller as described above, and the external dust is sucked by the suction part 100 and the communication part by the suction force. It is sucked into the dust collecting chamber of the main body 300 through the 200 is collected.

Subsequently, when the user manipulates the suction force control button 410 of the key input unit 400 to "strongest", the resistance value of the variable resistor VR becomes "0" and is represented by Equation 4 below from Diac. The pulse signal corresponding to the time constant T obtained by this is applied to the gate terminal of the triac Triac (see Figs. 5A to 5C).

T [sec] = Rn [Ω] · C [F]

In Equation 4, Rn is a resistance value of one of R1 to R3.

Here, when the first switch SW1 of the time constant adjusting unit 600 is turned on, "time constant (T) = R1C" becomes, and when the second switch SW2 is turned on, "time constant (T) = R2 · C ", and " time constant T = R3 · C " when the third switch SW3 is turned on.

As described above, the firing angle fa and the phase of the commercial AC voltage applied from the outside through the triac triac operated by the pulse signal applied from the diac is represented by Equation 4 It is controlled corresponding to the time constant T obtained by and applied to the motor M (see (d) of FIG. 5).

At this time, the power consumption of the motor (M) has a constant value even when the commercial AC voltage does not match the rated voltage (for example, 220 [V]) as can be seen in Table 1 below do.

TABLE 1

Commercial AC Voltage Time constant (T) Firing angle (fa) Power consumption of motor 190 [V] T = R1C fa ₁ 1050 [W] 220 [V] T = R2C fa ₂ 1050 [W] 250 [V] T = R3C fa ₃ 1050 [W]

According to the power consumption as described above, the rotational speed of the motor M becomes the maximum speed in the normal operation state, that is, the state in which the pressure switch PS is not turned on, and thus the suction force becomes the maximum in the normal operation state.

As described above, when the amount of dust collected in the dust collecting chamber of the main body 300 is greater than the set amount in the situation where the suction force is maximized in the normal operation state, the internal pressure of the dust collecting chamber becomes equal to or higher than the set pressure and the pressure switch PS ) Is turned on.

Here, even when the level of the commercial AC voltage is higher or lower than the rated voltage, as described above, the power consumption of the motor M is the same and the suction force is the same, so that the internal pressure of the dust collecting chamber of the main body 300 is equal. Since the same, the operating point of the pressure switch PS is equal to each other according to the amount of dust collected in the dust collecting chamber of the main body 300.

That is, even when the level of the commercial AC does not match the rated voltage, if the amount of dust collected in the dust collecting chamber of the main body 300 exceeds the set amount, the pressure switch PS operates correctly at that time. will be.

When the pressure switch PS is turned on, the time constant T becomes “0” and a pulse signal corresponding to the time constant T of “0” is applied from the triac Triac to Triac Triac. The firing angle is controlled to “fa ₀ ” through the triac so that a commercial AC voltage having a phase of 360 ° is applied to the motor M.

As described above, a commercial AC voltage having a phase of 360 ° is applied to the motor M through the triac, so that the power consumption of the motor M exceeds the power consumption in the normal operation state. The value becomes the maximum speed at which the rotational speed of the motor M exceeds the speed in the normal operation state, and thus the suction force is the maximum value exceeding the suction force in the normal operation state.

Accordingly, external dust is sucked into the dust collecting chamber of the main body 300 by more powerful suction force exceeding the maximum suction input in the normal operation state.

That is, when the amount of dust collected in the dust collecting chamber of the main body 30 becomes more than the set amount and the dust is not easily sucked by the suction force in the normal operation state, the pressure switch PS is turned on and the suction force is the maximum value. By rising to, the suction force compensation operation is performed to compensate for the lack of suction force in the normal operation state so that the dust is easily sucked.

As described above, in the present invention, a voltage sensing signal corresponding to the voltage level of the external input voltage is output from the voltage sensing unit, and the set suction input set by the user through the time constant adjusting unit and the voltage sensing signal output from the voltage sensing unit. The time constant is adjusted in accordance with the voltage phase control unit, and a phase controlled voltage is applied to the motor according to the time constant adjusted in the time constant adjusting unit, so that the external input voltage does not match the rated voltage. According to the amount of dust collected in the truth, the pressure switch is operated at the correct time to perform the suction force compensation operation normally.

Therefore, according to the present invention, even when the external input voltage does not match the rated voltage by controlling the phase of the voltage applied to the motor by adjusting the time constant according to the level of the set suction input and the external input voltage set by the user. In accordance with the amount of dust collected in the dust collection chamber to operate the pressure switch at the correct time has the effect that can perform the normal suction power compensation operation.

Claims (3)

In the vacuum cleaner which drives a motor to generate a suction force, and collects foreign substances, such as dust, in a dust chamber using this suction force, A voltage sensing unit for outputting a voltage sensing signal corresponding to the level of the external input voltage; A time constant adjusting unit for adjusting a time constant according to a set suction input set by a user through a key input unit, a voltage sensing signal output from the voltage sensing unit, and air pressure in the dust collecting chamber; And a voltage phase control unit configured to control a phase of the voltage input to the motor according to the time constant adjusted by the time constant adjusting unit. According to claim 1, wherein the time constant adjusting unit, A variable resistor whose resistance value is changed corresponding to a set suction input set by the user through the key input unit; A plurality of switches commonly connected to one end of the variable resistor and selectively turned on according to a voltage sensing signal output from the voltage sensing unit; A pressure switch connected to one end of the variable resistor in common and turned on when the air pressure inside the dust collecting chamber is equal to or greater than a predetermined pressure; A plurality of resistors connected to the plurality of switches, each having a different resistance value; And a capacitor connected to the pressure switch and the plurality of resistors in common. The method of claim 1 or 2, wherein the voltage phase control unit, A diaak for outputting a pulse signal corresponding to the time constant of the time constant adjusting unit, And a triac for controlling the phase of the voltage input to the motor in accordance with the pulse signal output from the diac.