KR100248501B1 - Electric cleaner - Google Patents

Abstract

In the vacuum cleaner which starts the electric blower 1 smoothly and starts the electric blower and the rotary brush with the same switch, the change of the wind noise which occurs in the rotary brush at the time of the start is suppressed, and the user feels discomfort. Provide an electric vacuum cleaner that prevents it from falling out.

A vacuum cleaner body having an electric blower 1 incorporated therein, a floor suction device connected to the vacuum cleaner body by a flexible hose, and a rotation installed in the floor suction device and rotated by the electric motor 2. A brush, and a control means for controlling the electric blower (1) and the rotary brush, a means for gradually increasing the air flow amount for a predetermined time after the start switch is inserted into the control means, and a motor after a predetermined time after the start switch is inserted It is characterized in that a means for starting or gradually increasing the rotational speed is provided.

Description

Vacuum cleaner

The present invention relates to a soft start vacuum cleaner which gradually increases the blowing amount of the electric blower after the start switch is turned on.

More specifically, the present invention relates to an electric vacuum cleaner which reduces as much as possible the abnormal sound from the rotating brush accompanying the increase in the amount of blowing air at start-up.

The conventional vacuum cleaner has an electric blower in the main body, and the electric power is turned on by application of a switch to rotate the electric blower at a high speed to suck up dust and dust together with air from the suction port.

The suction inlet of the vacuum cleaner is provided with a rotary brush for scraping dust (dust, rubbish), etc. attached to the carpet.

The rotary brush is driven by an electric motor separate from the electric blower.

Recently, as the vacuum cleaner market demands, the suction work rate of the vacuum cleaner is required to be increased. Therefore, the increase of the starting current at the start of operation is a problem, and the suction amount gradually decreases from the low speed when the start switch is turned on. Considering a so-called soft start can be considered to increase the speed.

However, in order to simplify driving operability, it is known to adopt a configuration in which an electric blower and a rotary brush motor of the floor suction mechanism are simultaneously driven when the start switch is turned on, for example, when cleaning a rug or the like. In the configuration, when the electric blower is started smoothly, there is a problem that the sound of wind caused by the rotation of the rotating brush changes as the suction amount of the electric blower is gradually increased, thereby causing discomfort to the user.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a vacuum cleaner which starts the electric blower smoothly and starts the electric blower and the rotating brush with the same starter switch, changes in the wind sound of the rotating brush occurring at the start-up are made. An object of the present invention is to provide an electric vacuum cleaner which suppresses the user from feeling discomfort.

1 is a control part of the electric blower and the rotary brush of the vacuum cleaner of the present invention.

Block schematic diagram.

FIG. 2 is an explanatory diagram of phase control of the control part of FIG. 1; FIG.

3 is a timing diagram of a generation position of a trigger for phase control of FIG.

Chart.

4 is a flowchart of control means by the microcomputer of FIG.

5 is a trigger in the control means of the second embodiment of the vacuum cleaner of the present invention.

Timing chart of generation position.

6 is a flowchart of the control means of FIG. 5;

Fig. 7 is a trigger in the control means of the third embodiment of the vacuum cleaner of the present invention.

Timing chart of generation position.

8 is a flow chart of the control means of FIG.

(Explanation of symbols for the main parts of the drawing)

1. Electric blower

2. Motor for rotating brush drive

5. Microcomputer (hereinafter abbreviated as micom)

6. Control element

7. Control element

The first means of the present invention is a vacuum cleaner main body having an electric blower, a floor suction device connected to the vacuum cleaner body via a flexible hose, and the floor suction device. A rotating brush rotated by the rotating brush, and a control means for controlling the electric blower and the rotating brush, the means for gradually increasing the blowing amount for a predetermined time after the start switch is put into the control means, and a predetermined time after the start switch is put in. And a means for starting the electric blower afterwards.

The second means of the present invention is a vacuum cleaner body having an electric blower, a floor suction mechanism connected to the vacuum cleaner body via a flexible hose, and a rotation provided in the floor suction mechanism and rotated by an electric motor. Brush and a control means for controlling the electric blower and the rotary brush, and after the start switch is put into the control means, a means for gradually increasing the blow amount of the electric blower and the rotational speed of the motor for a predetermined time It features.

According to a third aspect of the present invention, there is provided a vacuum cleaner body including an electric blower, a floor suction mechanism connected to the vacuum cleaner body via a flexible hose, and a rotation provided at the floor suction mechanism and rotated by an electric motor. Brush and control means for controlling the electric blower and the rotary brush, and after the start switch is put into the control means, a predetermined time after the means for gradually increasing the blowing amount of the electric blower and the start switch for a predetermined time And a means for gradually increasing the rotational speed of the electric blower.

Means for controlling the air blowing amount of the electric blower and controlling the starting or rotational speed of the electric motor are changed by a starting trigger position based on a zero-crossing signal of an alternating current waveform. It is preferable to make it happen.

(Example)

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 is a block explanatory diagram of a control part of an electric blower 1 and a rotary brush drive electric motor 2 of the vacuum cleaner of the present invention.

As shown in Fig. 1, 100v from a commercial power supply 3 is applied to the electric blower 1 and the electric motor 2 driving the rotary brush, respectively, and the control of the air blowing amount of the electric blower 1, and the electric motor. The starting or rotational force of (2) is controlled by the microcomputer (hereinafter referred to as a microcomputer) 5 as control means and the control elements 6 and 7.

The microcomputer 5 is driven by the power supply from the power supply circuit 4 for stepping down 100V of the commercial power supply 3 to about 5V. As described below, the microcomputer 5 synchronizes with the zero cross signal to generate an AC power supply trigger ( Phase control of AC power is performed by controlling the trigger position.

In addition, switching elements such as triac are used for the control elements 6 and 7 to control the electric blower 1 and the electric motor 2 by a trigger signal from the microcomputer 5. have.

The principle of this phase control is demonstrated with reference to FIG.

FIG. 2 shows the trigger positions (phases A1 and A4) at the start of starting, the trigger positions A2 and A5 at the start of weak operation, and the trigger positions (phases A3 and A6 during high driving) in one cycle of the AC power supply. .

That is, at the start of start-up, the power supply is turned ON at the phases of (A1) and (A4), and is turned off by the end of the half cycle.

That is, the hatched portion in Fig. 2A shows the voltage and time (phase angle) to which power is applied.

Therefore, the application time at the start of the start is very short, and the application time of the power supply is very short, and as the start of the trigger moves forward with the start, the application time increases as the trigger position advances to the positions A3 and A6 of the strong driving. As a result, power consumption is increased.

Figure 2 (b) shows the trigger position indicating the input power when starting the rotary brush drive motor (2) after about one second after the electric blower is started, Figure 2 (c) finishes the soft operation The waveform of the applied voltage when the strong electric power is input (the diagonal line part) is shown.

The timing chart which sets this trigger position is shown in FIG.

3A to 3C show zero cross signals T1, an electric fan drive trigger T2, and an electric motor drive trigger T3 having the same phase state as those of FIGS. 2A to 2C, respectively. It is shown.

That is, Fig. 3 (a) generates a trigger T2 for driving the electric blower after a certain time from the zero cross signal and operates the electric blower. Thus, the trigger is not applied to the electric motor 2 for driving the rotating brush. (See T3), the rotary brush has not yet started.

In the state shown in FIG. 3 (b), the trigger T2 position for driving the electric blower moves forward from the phase of FIG. The driving trigger T3 is issued to the electric motor for driving the rotating brush, and the rotating brush also operates.

In the state shown in Fig. 3 (c), the generating position of the trigger for driving the electric blower 1 goes further forward and becomes a strong state, and the electric motor comes out of the trigger in the same phase as the start of Fig. 3 (b) ( T3) shows that the voltage applied to the rotating brush drive motor 2 is constant.

The trigger is generated by the microcomputer 5 shown in FIG. 1, and the control elements 6 and 7 shown in FIG. 1 are turned ON by the trigger, and the electric blower 1 and the rotary brush are turned on. The driving motor 2 is driven.

As described above, since the trigger comes out on the basis of the zero cross signal of the AC power supply, the trigger is turned ON in the phase where the trigger is released and then turned off every half cycle.

Since the trigger comes out every half cycle, the position (phase) at which the trigger comes out gradually comes forward little by little in the control of the electric blower 1, so that the power is gradually increased.

The control for moving this trigger position forward little by little is performed by said microcomputer.

For example, the flowchart is shown in FIG. 4 as being gradually moved in equal parts by the time of soft start between the phase at the time of starting and the phase of strong driving.

First, the start switch is turned ON in order to use the vacuum cleaner in the stationary state (S1).

Then, the trigger is generated in the phases shown in Figs. 2A and 4A, and the electric blower starts operation in a weak state (S2).

Subsequently, the trigger position is moved forward (quickly) in order by each half cycle or every several cycles to move the trigger position (S3).

This is repeated, and after the start switch is turned ON, it is checked whether a preset time t1, e.g., 1 second has elapsed (S4), and whether the time for starting the motor 2 for rotating brush drive has been reached. Check it.

If the predetermined time t1 has not been reached, the process returns to step S3, and if this is repeated, for example, after 1 second has elapsed, a trigger for starting the motor is generated to start operation of the motor (S5).

Subsequently, the trigger for driving the electric blower 1 described above is a predetermined time t2 set as the time of soft start after turning on the start position (fast) (S6) and turning on the start switch. For example, it is checked whether 2 seconds have elapsed (S7), and the step S6 is repeated until the time is reached.

When the predetermined time t2 is reached, the vacuum cleaner is used in a strong state while the operation is continued in the set state.

According to the present invention, even if the start switch of the vacuum cleaner is turned ON, the suction amount of the electric blower 1 is gradually increased, and furthermore, the rotary brush drive motor 2 has a constant suction amount of the electric blower 1. Since it starts to start in the state which increased above, it becomes difficult to produce the discomfort which arises from the fluctuation of the wind sound of the rotating brush by the increase of suction amount.

Moreover, since there is only one start switch, it is not necessary to separately install the start switch of the electric blower 1 and the electric motor 2, the switch mechanism can be simplified, and the operation operability can be improved at the same time.

In addition, the time from the start of the electric blower 1 to the start of the electric motor 2 is set to about 1 second in the middle, with the soft start time being 2 seconds as described above. It is based on the harmony of the experiment result and the discomfort in use that the change of the wind blowing sound of the rotating brush due to the change of the suction wind volume after the second time has elapsed is increased.

That is, this time may be extended to start the rotary brush after the soft start time has ended and the set air volume has been reached.However, if it takes too long to start the engine after the start switch is turned ON, the machine may malfunction. Since it is easy to be mistaken, it is set to harmonize with the sense of discomfort caused by the change of the wind sound and the sense of discomfort caused by the time until the rotary brush is actually started after the start switch is turned ON.

5-6 is a figure explaining the control means in 2nd Embodiment of the vacuum cleaner of this invention, and is shown by the figure of the same form as FIG.

That is, this embodiment does not start the rotating brush after a certain time from the start of the electric blower, but gradually increases the number of rotations of the rotating brush while simultaneously starting the electric blower, so that the rotating brush increases with the suction amount of the electric blower. By increasing the number of rotations, the occurrence of abnormal sounds due to the change in the wind sound accompanying the increase in the air volume is prevented.

5 shows a timing chart of the trigger position similarly to FIG.

That is, the electric blower drive trigger T2 and the motor drive trigger T3 for the zero-crossing signal T1 are shown, respectively.

Fig. 5 (a) generates a trigger T2 for starting the electric blower and a trigger for starting the electric motor for rotating brush drive after a certain time from the zero cross signal to start both the electric blower and the rotating brush simultaneously.

In this case, however, the position of the trigger for driving the electric motor is started at the rear (late) position as in the position of the trigger for driving the electric blower.

Therefore, the rotation of the rotation brush also starts operation in a weak state by the weak electric power.

In the state shown in Fig. 5 (b), a timing chart showing the timing chart in the midway of the soft start time, that is, about 1 second has elapsed, which constitutes a trigger T2 for starting the electric blower and the electric motor. Both positions of the trigger T3 deviate forward (faster) from the position of the zero cross signal.

As a result, the suction air volume of the electric blower and the rotation speed of the rotary brush increase together. And the state shown in FIG.5 (c) has shown the timing chart at the time of the end of the time set to the soft start time.

In this state, the position where the trigger is generated causes the trigger for driving the electric blower and the trigger for driving the electric motor together to move forward more than the state of (b) to operate in a strong state, leading to normal operation.

This trigger generation position is controlled by a microcomputer, and the flowchart is shown in FIG. 6 similarly to FIG.

That is, when the start switch is turned ON (S11), a driving trigger is generated at the rear position (late phase), and the operation of the electric blower is started in a weak state (S12).

At the same time, a trigger for driving the motor is generated at the rear position (late phase), and the operation of the rotating brush is started in a weak state (S13).

Thereafter, the generation positions of the electric blower control trigger and the motor control trigger are gradually moved forward (S14, S15).

Thereafter, it is checked whether time t2 set as the soft start time has elapsed (S16), and steps S14 and S15 are repeated until the time elapses.

After the predetermined time t2 has elapsed, the operation is continued in that state and normal operation is performed.

According to this embodiment, the start of the rotary brush is also started at the same time as the start of the electric blower, but since the operation of the rotary brush is also soft-started by phase control, the rotation of the rotary brush is extremely weak at first, and the amount of suction air of the electric blower is reduced. Even if this increases, the sound of the wind changes, so that the user does not have an abnormal sound causing discomfort.

7-8 is a figure explaining the control means in 3rd embodiment of the vacuum cleaner of this invention, and is shown by the figure of the same shape as FIG. 3-4 and FIG.

In other words, this embodiment does not start the rotating brush after a certain time from the start of the electric blower, but gradually increases the number of rotations of the rotating brush and increases the number of rotations of the rotating brush in accordance with the increase of the suction amount of the electric blower. This is to prevent the occurrence of abnormal sound caused by the change of the wind sound caused by the increase of the air volume.

7 shows timing charts of trigger positions in the same manner as in FIGS. 3 and 5.

That is, the electric blower drive trigger T2 and the motor drive trigger T3 for the zero cross signal T1 are respectively displayed.

Fig. 7 (a) shows that a trigger T2 for driving the electric blower is generated after a certain time from the zero cross signal to operate the electric blower, but the trigger is not applied to the motor for driving the rotating brush (see T3). Does not start up yet.

In the state shown in Fig. 7 (b), the position of the trigger T2 for driving the electric blower at a time elapsed for about one second from the start of the electric blower goes ahead of the phase of Fig. 7 (a), and power is applied for a long time. At the same time, since the driving trigger T3 is issued to the motor for driving the rotating brush, the rotating brush also operates.

In this case, however, the position of the trigger for driving the electric motor is started at a position later than the trigger position for driving the electric blower.

Therefore, the rotation of the rotation brush starts operation in a weak state by the weak electric power.

In the state shown in Fig. 7 (c), it is a diagram showing a timing chart in a state in which about 2 seconds have elapsed since the start, and both the trigger T2 for driving the electric blower and the trigger T3 for driving the electric motor are The position is shifted forward (faster) from the position of the zero cross signal.

As a result, the suction air volume of the electric blower and the rotation speed of the rotary brush are operated together in a strong state, and the normal operation is performed.

The control of this trigger generation position is made with a microcomputer, and the flowchart is shown in FIG.

That is, when the start switch is turned ON (S21), a driving trigger is generated at the rear position (late phase), and the electric blower starts operation in a weak state (S22).

Subsequently, the trigger generation position is sequentially moved forward (quickly), and the trigger positions are moved by gathering every half cycle or every several cycles (S23).

After repeating this, the start switch is turned ON, and then it is checked whether a predetermined time t1, for example, one second has elapsed (S24).

In step S24, when predetermined time t1 passes, the trigger for starting an electric motor will generate | occur | produce in a back position (late phase), and a motor will start operation in a weak state (S25).

After that, the trigger for driving the electric blower and the trigger for driving the electric motor are forwarded (quickly) to their generating positions (S26, S27), and a fixed time determined by the time of soft start after the start switch is turned ON. t2, for example, checks whether 2 seconds have elapsed (S28), and repeats step S26 and step S27 until the time is reached.

When the predetermined time t2 is reached, the vacuum cleaner is used in a strong state while the operation continues in the set state.

According to this embodiment, even if the start switch of the vacuum cleaner is turned ON, the suction amount of the electric blower 1 gradually increases, and the rotary brush drive motor 2 is the suction amount of the electric blower 1. Since soft start is started in the state of increasing above this fixed value, it becomes difficult to produce a sense of discomfort due to the fluctuation of the wind noise of the rotating brush caused by the increase of the suction amount.

According to the present invention, an increase in the starting current can be suppressed, and an unpleasant feeling due to a change in the wind sound of the rotating brush caused by the change in the amount of intake air at the time of starting can be reduced.

Claims (3)

A vacuum cleaner body incorporating an electric blower 1, a floor suction mechanism connected to the vacuum cleaner body via a flexible hose, a rotary brush installed in the floor suction mechanism, and rotated by an electric motor, and the electric blower (1) and a control means for controlling the rotating brush, the means for gradually increasing the air volume for a predetermined time after the start switch is put into the control means and a means for starting the motor after a predetermined time after the start switch is put in. Electric vacuum cleaner, characterized in that installed. A vacuum cleaner body incorporating an electric blower 1, a floor suction mechanism connected to the vacuum cleaner body via a flexible hose, a rotary brush installed in the floor suction mechanism, and rotated by an electric motor, and the electric blower (1) and a control means for controlling the rotary brush, characterized in that the control means is provided with a means for gradually increasing the blowing amount of the electric blower and the rotational speed of the electric motor for a predetermined time after the start switch is put into vacuum cleaner. A vacuum cleaner body incorporating an electric blower 1, a floor suction mechanism connected to the vacuum cleaner body via a flexible hose, a rotary brush installed in the floor suction mechanism, and rotated by an electric motor, and the electric blower (1) and a control means for controlling the rotating brush, the means for gradually increasing the blowing amount of the electric blower for a predetermined time after the start switch is put into the control means and the electric blower after a predetermined time after the start switch Vacuum cleaner, characterized in that the means for gradually increasing the number of revolutions.