JP3244199B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner in which noise is reduced by active control.

[0002]

2. Description of the Related Art Conventionally, many measures against noise have been taken.
Only passive measures to reduce the noise generated from the electric blower itself have a certain limit in reducing the noise.

For this reason, for example, in a refrigerator, out of the sounds generated from a compressor or the like, the generated sound is canceled out by generating a phase having a remarkable frequency in opposite phase.
It is known to take active measures to reduce noise.

[0004] Japanese Patent Application Laid-Open No. Hei 4-2202 discloses an example in which this active noise control is applied to a vacuum cleaner.
The configuration described in Japanese Patent Publication No. 25 is known.

[0005] vacuum cleaner of this Japanese Patent 4-220225 JP stores noise generated from nitrous et beforehand vacuum cleaner, the phase of this remembers sounds flip it 180 °
You output Te. Then, the noise generated by the electric blower is
Let me measure it by feedback control with the microphone,
Based on the measurement result by the microphone, storage of
Noise from the electric blower
I'm making it.

[0006]

However, in the case of Japanese Patent Application Laid-Open No. Hei 4-220225, the electric blower
Feedback system by microphone for noise from machine
Reduces noise from electric blower because measurement is performed by control
There is a problem that the control to be performed is complicated .

The present invention has been made in view of the above problems, and has as its object to provide a vacuum cleaner having a simple configuration and reduced noise.

[0008]

According to a first aspect of the present invention, there is provided a vacuum cleaner having a variable output electric blower and an output of the electric blower.
And operating means for setting a and pronounce sound generating means substantially opposite phase of the frequency and sound output from the electric blower, the operation
Varying the output of the electric blower according to the operation of the means
And control means for varying the amount of sound produced by the sound producing means .

[0009]

According to the first aspect of the present invention, the operation of the operation means is performed.
According, the control means varying the output of the electric blower DOO
In addition, the amount of sound from the sound generator is variable,
Does this sound generating means substantially opposite phase of the frequency and sound output from
Make them pronounce . For this reason, the electric blower which fluctuates by operating the operation means to vary the output of the electric blower
Noise al, a variable sound generating means by the control means, efficient
Since the low reduction in, the noise from the electric blower with a simple structure
Can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 11 denotes a cleaner body, and the cleaner body 11 has a body case having an opening 12 at an upper front side.
13 and a lid 14 for opening and closing the opening 12 of the main body case 13 from above.

A dust collecting chamber 23 facing the opening 12 is formed in the main body case 13 by a partition wall 22 having a grid-like communication port 21.
Is formed in the front part and the electric blower room 24
Is formed in the rear part. In the dust collection chamber 23, a dust collection bag holder 25 is pivotally mounted on the upper part, and a paper dust bag 26 is detachably held by the dust collection bag holder 25. In addition, the dust collection room 23 and the electric blower room
A dust filter 27 that covers the communication port 21 is attached to a front side of a partition wall 22 that separates the filter 24 from the dust collecting filter 27.

On the other hand, the electric blower 31 is
Is held by the ribs 34, 35, 36 of the main body case 13 via rubber holding members 32, 33. The intake side of the electric blower 31 communicates with the dust collection chamber 23, and the exhaust side communicates with an exhaust port 37 formed on the rear outer surface of the main body case 13.

A body-side exhaust recirculation air passage 38 communicating with the exhaust side of the electric blower 31 is formed in the rear upper portion of the main body case 13. It opens as an outlet 39.

Further, the lid 14 is supported by the main body case 13 so as to be vertically rotatable via a fulcrum 41 formed at the rear end. The lid 14 has an opening 42 for communicating the outside with the dust collection chamber 23. And in this opening 42,
A suction port 43 is formed at one end of the suction hose so that the insertion pipe is detachably fitted and connected thereto. A plate-like shutter 44 is slidably supported in the suction port 43 in the front-rear direction. Then, the opening 42 is opened and closed freely.

At the rear of the cover 14, a cover-side exhaust recirculation air passage 45 is formed extending integrally from the cover 14 to the rear. The front end of the lid-side exhaust recirculation air passage 45 has a lid
The rear end of the electric blower 31 is connected to and communicates with the suction port 43 of the air blower 14, and the exhaust end of the electric blower 31 is connected to the dust collection chamber 23.

Further, a flap 46 for opening and closing the lid-side exhaust recirculation air passage 45 is provided in the lid-side exhaust recirculation air passage 45. The flap 46 is pressed and opened by a not-shown projection formed on the shutter 44 when the shutter 44 slides backward and closes, and is closed by its own weight when the shutter 44 slides forward and opens. It is.

The electric blower room 24 and the electric blower
The first sound generating means 51 is attached to the intake side rib 34 of the 31, and the second and third sound generating means 52 and 5 are mounted to the exhaust side rib 36.
3 is installed. The first to third sounding means 51 , 52, 53 are composed of, for example, a buzzer, a speaker, etc., which sound or vibrate in a phase opposite to the extremely high level frequency of the electric blower 31.

Further, below the exhaust port 37 at the rear of the electric blower 31, there is provided a detecting means 54 for detecting sound, vibration and air flow, such as a microphone, a pressure sensor, an air flow sensor or a vibration sensor.

Next, the internal configuration will be described with reference to FIG.

First, an electric blower 31 provided in the cleaner body 11 and a power brush 61 provided in a suction port (not shown) are respectively provided with a triac 6 for power control.
It is connected to a commercial AC power supply E via 2,63. The gates of the triacs 62, 63 are connected to control means 64 built in the cleaner body 11, and the control means 64 includes first to third sounding means 51 , 52, 53 and detection means. A means 54 is provided, and an operation means 65 provided on a hose body (not shown) is connected to the control means 64. This operating means 65 changes the output of the electric blower 31.
Set. Further, in the operation unit 65, the on / off electric blower 31, one stage output reduction, such as an on / off button of the 1-stage output increase and power brush 61 is provided.

Here, the control means 64 is controlled by the operation means 65.
According to the variable operation of the output of the electric blower 31, the electric blower
Output of the machine 31 and the first to third
The sound volume from the sound means 51, 52, 53 is varied.

Next, the operation of the circuit shown in FIG. 1 will be described with reference to the flowcharts shown in FIGS.

The electric blower 31 and the first to third sound generators 51 , 52, 53 are set in six stages from 0 in the OFF state and 1 from weak 1 to 5, respectively.

First, as shown in FIG. 4, a = 0 indicating that the hose is not connected, time start t = 0, output P = 0 of the electric blower 31, first to third sounding means 51 , 52, 53
The initial condition is set to the output Q = 0 (step 1), and the voltage value of the signal output from the operating means 65 is read and detected (step 2).

Further, based on a signal from the operating means 65, a =
1 is determined (step 3). If it is determined that a = 1, it is determined whether or not a hose (not shown) is in a non-mounted state (step 4). In this case, time measurement is started (step 5), and it is determined whether or not t ≧ 1 second later (step 6). If not t ≧ 1 second, the process returns to step 2; While the blower 31 is stopped, a = 0, t = 0, P = 0, Q = 0, b = 0
Is set (step 7), and the process returns to step 2.

On the other hand, if it is determined in step 3 that a is not 1 or that the hose is not mounted in step 4, it is determined whether or not the hose is mounted (step 8). If it is determined that t has not been performed, t = 0 is set (step 9), and the process returns to step 2.

If it is determined in step 8 that a hose is attached, a = a indicating that the hose is connected
1, t = 0 is set (step 10), it is determined whether or not the on / off button is operated (step 11). If it is determined that the on / off button is operated, the electric blower is operated. 31 and the power brush 61 are stopped (step 12), and the process returns to step 2. Then, in step 12, as shown in FIG. 4, it is determined whether or not a = 0 (step 21).
In the case of = 0, a = 0, t = 0, P = 0, Q = 0, and the electric blower 31 and the first to third sounding means 51 , 52,
53 is stopped (step 22). On the other hand, if a = 0, a = 1, P = 3, Q = 3, and the electric blower 31 and the first to third sounding means 51 , 52, 53 are started from 3 which is an intermediate output. (Step 23).

On the other hand, if it is determined in step 11 that the on / off button has not been operated, it is determined whether or not the output reduction button has been operated (step 13). When it is determined that the output has been performed, the operation of reducing the output of the electric blower 31 is performed (step 14), and the process returns to step 2. Then, in step 14, as shown in FIG. 5, it is determined whether or not P ≧ 2 (step 25).
If it is not ≧ 2, it is left as it is. On the other hand, P ≧
In the case of 2, P = P-1 and Q = Q-1, and the electric blower 31 and the first to third sounding means 51 , 52, 53 are lowered one by one (step 26).

Further, if it is determined in step 13 that the output reduction button has not been operated, it is determined whether or not the output increase button has been operated (step 15), and the output increase button has been operated. If it is determined that the output has increased, the operation of increasing the output of the electric blower 31 is performed (step 16), and the process returns to step 2. Then, in step 16, as shown in FIG. 6, it is determined whether or not P ≦ 4 (step 31).
If it is not ≦ 4, it is left as it is. On the other hand, P ≦
In the case of 4, P = P + 1 and Q = Q + 1, and the electric blower 31 and the first to third sounding means 51 , 52, 53 are each increased by one (step 32).

If it is determined in step 15 that the button for increasing the output is not operated, the power brush
It is determined whether or not the ON / OFF button of the power brush 61 has been operated (step 17) .If it is determined that the ON / OFF button of the power brush 61 has been operated, the power brush 61 is controlled.
(Step 18), and return to Step 2. And step 18
Then, as shown in FIG. 7, it is determined whether or not a = 0.
(Step 35) If a = 0, a = 1, P = 3, Q
= 3, and the electric blower 31 and the first to third sound generating means 51 , 52, 53 are started from 3 which is an intermediate output.
(Step 36). On the other hand, if a = 0, b = 0,
That is, it is determined whether the power brush 61 is driven.
(Step 37) If b = 0, the power brush 61 is driven with b = 1 (Step 38), and the power brush 61 is stopped with b = 0 (Step 39).

On the other hand, in step 17, the power brush 61 is turned on.
If it is determined that the / off button has not been operated, it is noise, so it is ignored and the process returns to step 2.

Next, another embodiment will be described with reference to the flowcharts shown in FIGS.

The electric blower 31 is set in six stages from 0 in the off state, 1 in the weak state to 5 in the strong state, and the first to third states.
Sounding means 51 , 52, 53 are 0 in the off state, 1 from weak and 1 from strong
It is set to 11 levels up to 0.

First, a = 0 indicating that the hose is not connected, time start t = 0, output P = 0 of the electric blower 31,
Initial conditions are set for the output Q = 0 of the first to third sounding means 51 , 52, 53 (step 41), and the voltage value of the signal output from the operating means 65 is read and detected (step 42).

Further, for example, a sound is detected by the detecting means 54 (step 43). Then, this sound detection is performed in advance by setting nine thresholds S1 , S2, and 9 in order to set a range corresponding to 10 steps except for turning off the first to third sounding means 51 , 52, and 53 .
…, S9 is provided. First, as shown in FIG. 9, it is detected whether or not the volume is equal to or higher than the threshold S1 (step 61). If the volume is equal to or lower than the threshold S1 , the output of the first to third sounding means 51 , 52, 53 is changed to Q = It is set to 1 (step 62). If it is determined in step 61 that the volume is not higher than the threshold S1, it is detected whether the volume is higher than the threshold S2 (step 63). If not, the first to third sounding means 51 , 52 are detected. , 53 are set to Q = 2 (step 64). Then, such an operation is repeated to detect whether or not the volume is equal to or higher than the threshold value S9 (step 6).
5) If it is determined that the output is not higher than the threshold value S9 , the outputs of the first to third sounding means 51 , 52, 53 are set to Q = 9 (step 66). The outputs of the first to third sounding means 51 , 52, 53 are set to Q = 10 (step 67). That is, the amount to be generated is set in accordance with the volume generated based on the electric blower 31, and the generated noise and the amount of sound for canceling out are harmonized to reduce the noise.

Then, based on a signal from the operating means 65, a
= 1 is or was not (step 44), if it is determined that a = 1, it is determined whether or hose (not shown) is not mounted (step 45), the hose is not attached In the case of (1), time measurement is started (step 46), and it is determined whether or not t ≧ 1 second later (step 47). If not t ≧ 1 second, the process returns to step 42. While stopping the electric blower 31, a = 0, t = 0, P = 0, b = 0 are set (step 48), and the process returns to step 42.

On the other hand, if it is determined in step 44 that a is not 1 or that the hose is not mounted in step 45, it is determined whether or not the hose is mounted (step 4).
9) If it is determined that the hose is not installed,
t = 0 is set (step 50), and the process returns to step 42.

If it is determined in step 49 that a hose is attached, a = a indicating that the hose is connected
1, t = 0 is set (step 51), and it is determined whether or not the on / off button has been operated (step 52). Since the on / off button has been operated, the electric blower 31 and Stop the power brush 61 (step 53), and
Return to 42. Then, in step 53, as shown in FIG. 10, it is determined whether or not a = 0 (step 71).
If not, a = 0, t = 0, P = 0 and the electric blower 31 is stopped (step 72). On the other hand, if a = 0, a = 1 and P = 3 are set, and the electric blower 31 is started from 3 which is an intermediate output (step 73).

On the other hand, if it is determined in step 11 that the on / off button has not been operated, it is determined whether the output reduction button has been operated (step 54). If it is determined that the operation has been performed, the output of the electric blower 31 is reduced (step 55), and the process returns to step. Then, in step 55, as shown in FIG.
It is determined whether or not ≧ 2 (step 25). If P ≧ 2, the state is maintained. On the other hand, if P ≧ 2, P = P−1 and the output of the electric blower 31 is reduced by one (step 76).

Further, if it is determined in step 54 that the output reduction button has not been operated, it is determined whether the output increase button has been operated (step 56), and the output increase button has been operated. If it is determined that the current has been reached, the output of the electric blower 31 is increased (step 57), and the process returns to step 42. Then, in step 56, as shown in FIG.
It is determined whether or not ≦ 4 (step 81). If P ≦ 4, the state is maintained. On the other hand, if P ≦ 4, P = P + 1 and the output of the electric blower 31 is increased one by one (step 82).

If it is determined in step 56 that the button for increasing the output is not operated, the power brush
It is determined whether or not the ON / OFF button of the power brush 61 has been operated (step 58) .If it is determined that the ON / OFF button of the power brush 61 has been operated, the power brush 61 is controlled.
(Step 59), and return to Step 42. And step 59
Then, as shown in FIG. 13, it is determined whether or not a = 0 (step 85). If a = 0, a = 1, P = 3 and the output of the electric blower 31 is set to an intermediate value. It starts from 3 which is the output (step 86). On the other hand, if a = 0, b = 0, that is, whether or not the power brush 61 is driven is determined (step 87). If b = 0, the power brush 61 is driven with b = 1. (Step 88), b = 0 and the power brush 61 is stopped (Step 89).

On the other hand, in step 58, the power brush 61 is turned on.
If it is determined that the / off button has not been operated, it is noise, so it is ignored and the process returns to step.

Thus, according to the operation of the operation means 65,
The control means 64 varies the output of the electric blower 31 and
The sound volume from the first to third sound generators 51, 52, 53
Variable, almost in phase with the sound output from the electric blower 31
Of the first to third sounding means 51, 52, 53
Operating the operating means 65 to generate sound from the electric blower 31
The electric blower 31 which fluctuates by changing the output of the
These noises are transmitted to the first to third sound generators by the control means 64.
The stages 51, 52, 53 are variable and can be reduced efficiently.

Thus, for example, noise from the electric blower 31
Control of the amount of noise generated by microphone
And measure the result with this microphone.
Based on the control of the vibration of the vibrator,
Simplified control and configuration compared to noise reduction
Reduces noise from the electric blower 31 with a simple configuration
it can.

[0046] In addition, to detect the sound volume in the detection means 54,
First to third sounding means 51 , 5 based on the detected volume.
By controlling the outputs 2 and 53, it is possible to cope with the state of clogging with dust, and to reduce noise during rotation due to inertia after the input to the electric blower 31 is stopped.

Most of the noise from the electric vacuum cleaner is generated from the electric blower 31.
The noise generated from the motor may be generated from a motor (not shown) or a fan. The frequency of the noise generated from the motor is substantially determined according to the rotation speed of the motor, and the frequency of the noise generated from the fan is determined according to the rotation speed of the motor and the number of blades of the fan. For example, when the rotation speed of the electric motor is 500 rpm and the number of fan blades is 9
The frequency of the standing wave that becomes the base tone when the number of sheets is 500 rpm
× 9 = 4500 Hz. Here, even if only a 4500 Hz sound having the same frequency as the noise generated from the fan and having the opposite phase is generated, the noise can be significantly reduced. In this way, only a single frequency with the loudest volume may be generated.

According to the above-described embodiment, by outputting a sound having a preset phase opposite to the frequency of a frequency which is considered to be generated, the noise can be reduced, and a storage element for storing the sound can be provided. Since it becomes unnecessary, the configuration can be simplified.

[0049]

According to the vacuum cleaner of the first aspect, the operation is
In accordance with the operation of the work means, control means is the output of the electric blower
Variable and the amount of sound from the sounding means
Frequency that is almost in phase with the sound output from the electric blower.
In order to generate sound from this sounding means, the operating means is operated to change the output of the electric blower.
The noise from the blower can be efficiently reduced by changing the sound generator by the control means.
It is possible to reduce the noise.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a vacuum cleaner according to the present invention.

FIG. 2 is a cross-sectional view showing the main body of the cleaner.

FIG. 3 is a flowchart showing an overall operation of the above.

FIG. 4 is a flowchart showing an on / off operation shown in FIG. 3;

FIG. 5 is a flowchart showing the output reduction operation shown in FIG. 3;

FIG. 6 is a flowchart showing an output increasing operation shown in FIG. 3;

FIG. 7 is a flowchart showing the operation of the power brush shown in FIG. 3;

FIG. 8 is a flowchart showing the overall operation of the other embodiment.

FIG. 9 is a flowchart showing an operation of sound detection shown in FIG. 8;

FIG. 10 is a flowchart showing the on / off operation shown in FIG. 8;

FIG. 11 is a flowchart showing the output reduction operation shown in FIG. 8;

FIG. 12 is a flowchart showing an operation of increasing the output shown in FIG. 8;

FIG. 13 is a flowchart showing the operation of the power brush shown in FIG. 8;

[Explanation of symbols]

31 electric blower 51 first sound generating means 52 second sound generating means 53 third sound hand stage 64 control unit 65 operation unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47L 9/28 A47L 9/00 103

Claims (1)

(57) [Claims] And 1. A variable output of the electric blower, and operating means for setting the output of the electric blower, and Could sound generating means substantially opposite phase of the frequency and sound output from the electric blower, the operation of the operation means Output of the electric blower
And a control means for changing the amount of sound produced by the sounding means.