JP3505957B2 - 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 an electric vacuum cleaner having a blower and a dust collecting chamber in its main body, and more particularly to controlling a suction motor, detecting the amount of dust in the dust collecting chamber and the like. Is.

[0002]

2. Description of the Related Art Conventionally, in this type of vacuum cleaner, for example, a switch for detecting the landing of the suction port body is provided at the bottom of the suction port body to control ON / OFF of the brush motor. There is a vacuum cleaner. This vacuum cleaner drives the brush motor only when the suction port is on the floor,
The brush motor is stopped when the suction port is out of bed.

Further, as an example of an electric vacuum cleaner having a function of detecting and determining the amount of dust, Japanese Patent No. 2547630
There is one disclosed in the issue. The electric vacuum cleaner disclosed herein is provided with a cleaner body having a dust collection chamber and a storage chamber for storing an electric blower, adjusting means for adjusting the suction force of the electric blower, and the suction side of the electric blower. Pressure sensor, comparing means for comparing the pressure detection output value detected by the pressure sensor with a preset reference pressure value, and the reference pressure value is changed in proportion to the suction force adjusted by the adjusting means. The changing means and the dust amount display section including a plurality of display bodies for detecting and determining the dust clogging state in the dust collecting chamber based on the comparison result of the comparing means and displaying the output in stages. The suction force of the electric blower is adjusted by the user to several stages of suction force. Then, with the above configuration,
The reference pressure value is changed by the changing means in proportion to the suction force adjusted by the adjusting means, and the reference pressure value and the detection output value of the pressure sensor are compared by the comparing means. Then, a dust clogging state is detected and determined based on the comparison result, and a corresponding number of display bodies are turned on to display the amount of dust in the dust collection chamber. With this, even if the suction force of the electric blower is switched by the adjusting means, if the amount of dust stored in the dust collection chamber is the same, the display state of the display body becomes the same regardless of the adjustment of the suction force, and the amount of dust is displayed. It becomes constant regardless of the suction force of the electric blower, and the user is notified of the exact amount of dust.

Further, as an example of an electric vacuum cleaner having a function of controlling the suction force of an electric blower, there is one disclosed in Japanese Patent Laid-Open No. 8-519. The vacuum cleaner disclosed herein is supplied to a suction port body, a rotating body that comes into contact with a surface to be cleaned provided in the suction port body, a driving unit that rotates the rotating body, and a driving unit. It is composed of detection means for detecting an electric current and notification means for notifying that the suction port body is pressed against the surface to be cleaned with a predetermined pressure or more. With the above configuration, when the suction port body is pressed against the surface to be cleaned while the drive means is operating, a load is applied to the rotating body that is in contact with the surface to be cleaned, so that the rotating body is rotated. The current flowing through the drive means increases. Therefore, the pressing state can be detected by the increase in the current. The detection means detects this current, and when this current is detected above a predetermined value, the notification means notifies the user that the pressing force is strong, and can prompt the user to reduce the pressing force. Also, for the user,
It is said that the user can easily recognize the driving state and the operability is improved because the user is notified that the pressing force is too strong.

[0005]

However, in the electric vacuum cleaner configured to control ON / OFF of the conventional brush motor, the control target is only the brush motor, and the suction motor for sucking dust is used. Regarding the motor, the input power is not controlled regardless of whether the suction port is on or off the floor. Therefore, even when the suction port is separated from the floor surface and is not actually cleaned, the brush motor stops, but the suction motor is driven at a high rotation speed, which causes a loud noise and unnecessary power consumption. There was a problem of consuming.

Further, in the electric vacuum cleaner disclosed in Japanese Patent No. 2547630, the output value of the pressure sensor provided on the suction force side for determining the amount of dust in the dust collecting portion is adjusted by the user. Since it is simply compared with the pressure reference value corresponding to the suction force, for example, the suction state of the suction port body other than the dust collecting part on the suction force side (by sucking the suction port body against the floor surface etc. Change in the state where the material sticks to the floor, etc.)
When the pressure disturbance from the suction port side occurs, there is a problem that the dust amount cannot be accurately determined.

Further, the electric vacuum cleaner disclosed in Japanese Patent Laid-Open No. 8-519 determines the pressing state of the suction port body, but informs the user that the pressing force is strong by the notifying means. Despite this, if the user continues to press it without noticing it, a current above the specified value will flow to the drive means (motor) that rotates the rotating body, but the current value will increase because the motor is not controlled. Therefore, there is a problem that the input value of the entire vacuum cleaner may exceed the allowable range. Also, since the user is only notified by the notification means, the user must recognize that the pressing force is strong by the notification means and reduce the pressing force by himself, especially the operability is improved. I can't say that

The present invention has been made to solve the above problems, and when the suction inlet is out of bed, the electric vacuum cleaner that stops the brush motor and further controls the electric power applied to the suction motor. The purpose is to obtain. Further, the present invention determines the exact amount of dust clogging in the dust collection chamber even if a change in pressure from other than the dust collection part occurs, such as a change in the suction state of the suction port body, and determines the amount of dust in the dust collection chamber. The purpose is to obtain an electric vacuum cleaner that can be informed. Further, according to the present invention, even if the user pushes the suction port body against the floor surface strongly, the user does not weaken the pushing force by himself / herself, and automatically performs control so as not to exceed the allowable input value. It is an object of the present invention to provide an electric vacuum cleaner that is capable of improving the operability.

[0009]

An electric vacuum cleaner according to a first aspect of the present invention is a vacuum cleaner main body containing a blower, a dust collecting chamber having a dust collecting bag, and the like, and is connected to the vacuum cleaner main body. A suction port body that comes into contact with the floor surface and sucks dust, dust, etc. on the floor surface,
A brush motor that drives a rotating brush provided in the suction port body, a suction motor that drives the blower, and a suction motor that is attached to the suction port body and is turned on by landing of the suction port body to drive the brush motor. A floor detection switch, first current detection means for detecting a load current of the brush motor,
The load current of the brush motor is detected by the first current detecting means.
If not, the drive voltage of the suction motor is
The load current of the brush motor is detected by the current detection means.
The input control means for controlling the input voltage to be lower than that in the above case is provided.

An electric vacuum cleaner according to a second invention is a blower,
A vacuum cleaner body that has a built-in dust collection chamber equipped with a dust bag, and a suction port body that is connected to this vacuum chamber body and comes into contact with the floor surface to suck in dust and dust on the floor surface, and a suction port body. A brush motor for driving the provided rotating brush, a suction motor for driving the blower, and a landing detection switch which is attached to the suction port body and is turned on by landing of the suction port body to drive the brush motor. The first current detecting means for detecting the load current of the brush motor, the second current detecting means for detecting the load current of the suction motor, and the larger the detection output of the first current detecting means , The set threshold is
And adjusting means adjusted to be lower, and the threshold adjusted by the adjusting means, comparing the detection output of the second current detection means, and dust amount determining means for determining the dust clogging of the dust collecting chamber A notifying unit for notifying the amount of dust clogging in the dust collection chamber based on the determination output of the dust amount determination unit is provided.

An electric vacuum cleaner according to a third aspect of the present invention is the above-mentioned first aspect.
In each invention of the first invention and the second invention, the first current detection
The means is provided on the cleaner body side, and the first current detector
The output means, brush motor, and landing detection switch are electrically connected.
Are connected in series.

[0012]

[0013]

FIG. 4 is a perspective view showing the overall structure of an electric vacuum cleaner according to an embodiment of the present invention, which has a structure common to Embodiments 1 to 3 described later. In FIG.
F is a floor surface composed of a board floor or a carpet floor, 1 is a cleaner body placed on the floor surface, and has a blower 2, a dust collection chamber 3 and the like built therein. Reference numeral 3a is a dust collecting bag provided in the dust collecting chamber 3, and 4 is a suction motor for driving a blower. Reference numeral 5 is a hose, and a grip portion 6 is provided at the tip. Reference numeral 7 is a manual operation unit provided on the grip 6 and capable of driving the vacuum cleaner. Reference numeral 8 is a telescopic extension tube attached to the tip of the grip portion 6, and 9 is a suction port body attached to the tip of the extension tube 8.
10 is a brush motor for driving the rotating brush 12;
Is a landing detection switch that is turned on when the suction port body 9 has landed on the floor surface, and 13 is a display means for displaying that the dust clogging amount in the dust collection chamber is full. The display means 13 corresponds only to the second embodiment described later.

Embodiment 1. 1 is a block diagram illustrating the configuration of a control circuit according to a first embodiment of the present invention. 21
Detects the load current flowing through the brush motor 10, and when the load current flows through the brush motor 10, the detection signal I
This is the first current sensor that outputs B and does not output a signal when it does not flow. The first current sensor 21 is electrically connected to the landing detection switch 11 and the brush motor 10 in series. Reference numeral 22 is an input control unit that controls the drive voltage of the suction motor 4 based on the detection output of the first current sensor, and is provided in the phase control unit 22a and the CPU 12 that controls the entire electric vacuum cleaner. Load determination means 2
2b and suction force control means 22c. The load determination means 22b determines the load state of the suction port body 4 when the suction port body 4 is on or off the floor, depending on whether or not the output signal IB of the first current sensor 21 is detected.
c determines the input power of the suction motor 4 based on the determination of the load determination unit 22b, and the phase control unit 22a controls the phase of the drive voltage of the suction motor 4. FIG. 5 is a diagram showing characteristics of the current value IB (first current sensor output signal value) flowing in the brush motor 10 when the brush motor 10 is driven and stopped.

Next, the operation of the first embodiment configured as above will be described. First, when the vacuum cleaner is operated from the hand operation unit 7, the suction motor 4 is driven at a predetermined value aW for a predetermined time t1 second, and the brush motor 10 is fully energized to start driving. When the suction port body 4 is not on the floor, the landing detection switch 11 is off. Therefore, the brush motor 10 connected in series to the landing detection switch 11 is not driven (stopped). As shown in FIG. 5, when the brush motor 10 is stopped, the brush motor current (load current flowing in the brush motor 10) is 0, and no current flows in the brush motor 10, so The signal IB from the current sensor 21 of No. 1 is not output to the load determination means 22b. Since the load determination means 22b cannot detect the signal IB from the first current sensor 21, it determines that the suction port body 9 is not landed and outputs a signal indicating that it is not landed to the suction force control means 22c. To do. The suction force control means 22c detects a signal indicating that the suction port 9 has not landed, and the predetermined input value bW (aW> b) of the suction motor 4 when the suction port body 9 has not landed.
The phase control of the voltage is performed by the phase control means 22a so that the suction motor 4 is driven in (W).

On the other hand, when the suction port body 9 is on the floor, the landing detection switch 11 detects the landing and is turned on, so that the brush motor 10 is driven. As shown in FIG. 5, since the brush motor current is flowing when the brush motor 10 is driven, the first current sensor 21 detects the current and outputs the detection signal IB to the load determination means 22b. Output to. The load determination means 22b receives the detection signal IB from the first current sensor 21, determines that the suction port body 9 is on the floor, and outputs a signal indicating that it is on the floor to the suction force control means 22c.
Output to. The suction force control means 22c detects a signal indicating that the floor is landed, and instructs the phase control means 22a to drive the suction motor 4 with an input predetermined value aW when the suction port body 9 is landed. Control the voltage phase.

As described above, in the first embodiment,
By reliably detecting the landing of the suction port body 9, the brush motor 10 can be driven only when the suction port body 9 is landed. If the suction port body 9 is not on the floor, it is determined that cleaning is not performed, and the suction motor 4
Since the input value of is lowered to drive, it is possible to secure energy saving, silent operation, and safety. In addition, since it is possible to detect the landing or leaving of the suction port body 9 by the suction port body 9 without providing the vacuum cleaner body 1 with a troublesome physical signal transmission means, the signal transmission means is not provided. It is not affected by static electricity and has excellent reliability, and the structure is simple and the manufacturing cost can be reduced.

Embodiment 2. In the second embodiment, the user is notified that the dust clogging amount in the dust collection chamber 3 is full. FIG. 2 is a block diagram illustrating the configuration of the control circuit according to the second embodiment of the present invention. In FIG. 2, parts having the same functions as those in the first embodiment are designated by the same reference numerals,
The description is omitted. Reference numeral 31 is an adjusting means for adjusting a preset reference signal based on the detection output of the first current sensor. The load determining means 31a and the reference signal adjusting means 3 are provided.
It is composed of 1b. It should be noted that the load determination means 31a uses the output signal IB of the first current sensor 21 to determine that the suction port 9
Back-and-forth sliding movement and suction (state in which suction port body 9 sticks to the floor surface etc. by pressing suction port body 9 against the floor surface etc.)
And the like determine the load fluctuation applied to the suction motor 4 to obtain the reference signal adjustment value VE. Further, the reference signal adjusting means 31b
Adjusts a reference signal (hereinafter referred to as threshold value V1) from the result determined by the load determination means 31a. The threshold value V1 is a signal preset in the adjusting means 31b or 31 in order to determine the amount of dust clogging in the dust collection chamber 3.

Reference numeral 32 is a second current sensor for detecting the load current flowing through the suction motor 4. Reference numeral 33 is a dust amount determining means for comparing the output signal IK of the second current sensor 32 with the reference signal adjusted by the reference signal adjusting means to determine the dust clogging amount in the dust collecting chamber 3. The adjusting unit 31 and the dust amount determining unit 33 control the CPU 3 that controls the entire vacuum cleaner.
It is provided within 5. Reference numeral 34 is a display means for displaying, based on the determination signal of the dust amount determination means 33, if the dust amount is full.

FIG. 6 is a diagram showing the relationship between the amount of dust in the dust bag 3a and the suction motor current value IK (second current sensor detection signal). FIG. 6 shows that the suction motor current value decreases as the amount of dust in the dust collecting bag 3a increases. From this relationship, the dust clogging amount can be detected by the suction motor current value.

FIG. 8 shows a brush motor current value IB (first current sensor detection signal) and a reference signal adjustment value V which are used when the reference signal adjustment value VE is obtained by the load judging means 31a.
FIG. 8 is a diagram showing a reference signal adjustment amount characteristic showing a relationship with E.

Next, the operation of the second embodiment will be described. First, when the vacuum cleaner is operated by the hand operation unit 7,
The suction motor 4 and the brush motor 10 start driving. When the suction port body 9 is not on the floor, the landing detection switch 11 is off, so the brush motor 10 connected in series to the landing detection switch 11 is not driven. At this time, since the load current does not flow in the brush motor 10, the signal IB of the first current sensor 21 is the load determination means 3
1a and the load determination means 31a cannot detect the signal IB from the first current sensor 21, so VE is set to 0.
Is output to the reference signal adjusting means 31b. Since the received signal VE is 0, the reference signal adjusting means 31b outputs the threshold value V1 to the dust amount determining means 33. At this time,
The second current sensor 32 detects the load current flowing through the suction motor 4 and outputs the detection signal IK to the dust amount determination means 33, which detects the threshold value V1 and the second current. The detection signal IK of the sensor 32 is compared and the characteristics of FIG. 6 are used to detect the detection signal IK of the second current sensor 32.
Is less than or equal to the threshold value V1, it is determined that the amount of dust in the dust collection chamber 3 is full. If the amount of dust is full, the display means 34 displays. When the suction port body 9 is not landed, the brush motor 10 is not driven, and the load on the suction motor 4 does not fluctuate due to front-back sliding of the suction port body 9 or sticking. It is not necessary to consider the influence of fluctuations on the dust amount determination.

On the other hand, when the suction port body 9 is landed,
Since the brush motor 10 is driven, load fluctuations occur in the suction motor 4 due to front-back sliding of the suction port body 9 and the phenomenon of suction. Further, the sliding movement of the suction port body 9 in the front-rear direction, the phenomenon of sticking to the suction port body 9, and the like cause a load variation in the rotary brush 12. Therefore, the load fluctuation on the suction motor 4 due to the front-back sliding of the suction port body 9, the phenomenon of sticking, etc.
Judgment is made based on the fluctuation of the load current flowing in No. 2.

FIG. 7 shows that when the suction port body 9 is pressed against the floor surface or the like, a sticking phenomenon occurs, and thereby the load current IB (first current sensor detection signal) flowing through the brush motor 10 fluctuates. FIG. 6 is a diagram showing a load amount characteristic of the brush motor. FIG. 7 shows that as the degree of the suction phenomenon of the suction port body 9 increases, the load applied to the rotary brush 12 becomes heavier and the brush motor current value increases.

The first current sensor 21 detects the brush motor current and outputs the detection signal IB to the load determination means 31.
output to a. The load determination means 31a obtains the reference signal adjustment value VE from the received brush motor current IB based on the characteristics of FIG. 8, and the signal VE is used as the reference signal adjustment means 31b.
Output to. The reference signal adjusting means 31b receives the received signal V
E is subtracted from the threshold value V1 and the value is subtracted from the threshold value V2.
(V2 = V1-VE). Then, the signal V2 is output to the dust amount determination means 33. The dust amount determination means 33 compares this signal V2 with the detection signal IK of the second current sensor 32, and if the detection signal IK is less than or equal to the signal V2, it is determined that the dust clogging amount in the dust collection chamber 3 is full. Display means 3
Display at 4.

As described above, in the second embodiment,
The landing detection switch 11 determines whether the suction port body 9 is on or off the floor. At the time of landing, not only the influence of the pressure on the dust collecting chamber 3 side
The amount of dust in the dust collection chamber 3 can be accurately determined because the amount of dust is determined by taking into consideration the influence of the pressure from the side of the suction port 9 due to the sliding of the suction port 9 back and forth and the phenomenon of sticking. it can. Further, by displaying on the display means 34 that the amount of dust in the dust collection chamber 3 is full, the user can be informed that the amount of dust in the dust collection chamber 3 is full. It is possible to prevent the deterioration of the dust collection force due to excessive clogging, the heat generation of each part due to insufficient cooling, and the abnormal state leading to smoke and ignition.

In the second embodiment, the display means 34 for displaying is shown as means for notifying the user of the amount of dust clogging in the dust collecting chamber 3, but as the notifying means,
The display is not limited, and a buzzer or the like can be used. Further, although the method of displaying when the amount of dust clogging is full has been shown, by setting the threshold value in multiple stages and comparing the threshold value with the load current flowing in the suction motor 4, It is also possible to display the amount of dust in stages.

Embodiment 3. In the third embodiment, the electric vacuum cleaner is driven without exceeding the input power value in the legally allowable range, and the input power is used as effectively as possible to maximize the suction force. FIG. 3 is a block diagram illustrating the configuration of the control circuit according to the third embodiment of the present invention. In the figure, parts having the same functions as those in the first embodiment are designated by the same reference numerals, and the description thereof is omitted.

Reference numeral 41 is for suction so that the total input power of the brush motor 10 and the suction motor 4 becomes constant based on the detection outputs of the first current sensor 21 and the second current sensor 32. Input control means for controlling the drive voltage of the motor 4, and input detection means 41a provided in the CPU 42 for controlling the phase control means 22a and the vacuum cleaner as a whole.
And input constant control means 41b. In addition,
The input detection means 41a uses the signal IB of the first current sensor 21.
And the signal IK from the second current sensor 32, the total input power of the brush motor 10 and the suction motor 4 is detected.
The constant input control means 41b controls the phase of the drive voltage of the suction motor 4 by the phase control means 22a so that the total input power becomes constant from the detection result of the input detection means 41a.

Next, the operation of the third embodiment will be described. First, when the vacuum cleaner is operated by the hand operation unit 7,
The suction motor 4 is driven at a predetermined value aW for a predetermined time t1 second, and the brush motor 10 is driven at full power.

When the suction port body 9 is not on the floor, the landing detection switch 11 is off, so the brush motor 10 connected in series to the landing detection switch 11 is not driven. At this time, since the load current does not flow in the brush motor 10, the signal IB of the first current sensor 21 is not output to the input detection means 41a, and the input detection means 41a is the first
Since the signal IB from the current sensor 21 of
Only the signal IK output from the second current sensor 32 is received. Then, the input detection means 41a detects the input power of the suction motor 4 from the signal IK and outputs the detection signal to the constant input control means 41b. Input constant control means 41
b receives the above-mentioned detection signal and sets the suction motor 4 to a predetermined value c
The phase control means 22 is driven so as to drive with W (cW> aW).
At a, phase control of the drive voltage of the suction motor 4 is performed.

On the other hand, when the suction port body 9 is on the floor, the landing detection switch 11 detects the landing and turns on, so that the brush motor 1 connected in series to the landing detection switch 11 is used.
A load current flows to 0 and the brush motor 10 is driven. The first current sensor 21 detects the load current and outputs a detection signal IB to the input detection means 41a. On the other hand, the second current sensor 32 detects the load current flowing in the suction motor 4 and outputs the detection signal IK to the input detection means 41a. The input detection means 41a detects the total input power value of the brush motor 10 and the suction motor 4 from the two signals IB and IK, and outputs the detection signal to the constant input control means 41b. Based on the detection signal, the constant input control means 41b uses the brush motor 10 and the suction motor 4
Phase control means 2 so that the total input power value of
Phase control of the drive voltage of the suction motor 4 is performed at 2a.

As described above, in the third embodiment,
The landing detection switch 11 determines whether the suction port body 9 is on or off the floor, and controls so that the total input power value of the brush motor 10 and the suction motor 4 is constant. The suction motor 4 can be driven, and when landing, the input power can be effectively utilized within the allowable input power value, and the suction force can be maximized. Further, since the total input electric power value of the brush motor 10 and the suction motor 4 is controlled to be constant, the electric vacuum cleaner can be driven without exceeding the input electric power value in the legally permissible range. Therefore, the brush motor 10
Can be effectively cleaned according to the landing and leaving of the floor, and the input voltage of the suction motor 4 is automatically controlled even if the force of pressing the suction port body 9 against the floor surface is strong, and as a result, the overall tolerance is obtained. Since the control is performed without exceeding the input power value in the range, the user does not have to perform an operation such as weakening the pressing force, so that the operability is improved.

[0034]

As described above, the first invention of the present invention detects the landing of the suction port body by the landing detection switch,
When not landing, the drive of the brush motor is stopped. Further, by detecting the load current of the brush motor by the first current detecting means, it is determined whether or not the vehicle is on the floor. For example, when it is determined that the vehicle is not on the floor, the suction motor is driven. Since the drive is performed by lowering the voltage, it is possible to secure energy saving, silent operation, and safety.

As described above, the second aspect of the present invention adjusts a preset reference signal based on the detection output of the first current detecting means (load current flowing in the brush motor) and adjusts it. Since the amount of dust is determined by comparing the generated reference signal with the detection output of the second current detection means (load current flowing in the suction motor), the suction port side due to the front-back sliding of the suction port body, the phenomenon of sticking, etc. The amount of dust can be determined in consideration of the influence of the pressure from, and the amount of dust can be detected accurately. In addition, since the notification means notifies, the user can be notified of the amount of dust in the dust collection chamber, which reduces the dust collection force due to excessive accumulation of dust, heat generation in each part due to insufficient cooling, and further smoke emission. It is possible to prevent an abnormal situation from occurring and provide a safe and easy-to-use vacuum cleaner.

According to the third aspect of the present invention, as described above, the first current sensor is provided on the cleaner body side, and the first current sensor is provided.
The flow detection means, the landing detection switch, and the brush motor are electrically
Since it was connected in series in the air, it is possible to set the suction port body on or off the floor.
Provide the vacuum cleaner body with annoying physical signal transmission means.
It can be detected by the main body of the vacuum cleaner. Well
In addition, it is not affected by static electricity because no signal transmission means is provided.
It is highly reliable and has a simple structure,
Can be reduced.

[0037]

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a configuration of a control circuit according to a first embodiment.

FIG. 2 is a block diagram illustrating a configuration of a control circuit according to a second embodiment.

FIG. 3 is a block diagram illustrating a configuration of a control circuit according to a third embodiment.

FIG. 4 is a perspective view showing the overall configuration of the electric vacuum cleaner according to each of the first to third embodiments of the present invention.

FIG. 5 is a diagram showing characteristics of a current flowing through the brush motor in the first embodiment.

FIG. 6 is a diagram showing the relationship between the amount of dust in the dust bag and the suction motor current value in the second embodiment.

FIG. 7 is a diagram showing a load amount characteristic of a brush motor in the second embodiment.

FIG. 8 is a diagram showing a reference signal adjustment amount characteristic in the second embodiment.

[Explanation of symbols]

1 vacuum cleaner body, 2 blower, 3 dust collecting chamber, 3a dust collecting bag, 4 suction motor, 9 suction port body, 10 brush motor, 11 landing detection switch, 12 rotating brush,
21 first current sensor, 22, 41 input control means,
31 adjusting means, 32 second current sensor, 33 dust amount judging means, 34 display means

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Inokuma 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture 1 Mitsubishi Electric Home Equipment Co., Ltd. (72) Masafumi Nagata 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) Reference JP-A-9-70377 (JP, A) JP-A-9-47405 (JP, A) JP-A-9-10153 (JP, A) JP-A-5-253150 ( JP, A) JP-A 2-147041 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/28 A47L 9/04

Claims (3)

(57) [Claims] 1. A cleaner main body having a blower, a dust collecting chamber having a dust collecting bag, etc., and a suction port connected to the cleaner main body for sucking dust, dust, etc. on the floor in contact with the floor. A body, a brush motor for driving a rotary brush provided in the suction port body, a suction motor for driving the blower, and a suction motor attached to the suction port body, which is turned on by landing of the suction port body, a landing detection switch for driving the motor brush, a first current detecting means for detecting a load current of the motor for the brush, negatively charged motor said brush in said first current detection means
If no flow is detected, the suction motor drive voltage is
The pressure is generated by the first current detecting means of the brush motor.
An electric vacuum cleaner, comprising: input control means for controlling the load current to be lower than that when the load current is detected . 2. A cleaner main body having a blower, a dust collecting chamber having a dust collecting bag, and the like, and a suction port connected to the cleaner main body for sucking dust, dust, and the like on the floor in contact with the floor. A body, a brush motor for driving a rotary brush provided in the suction port body, a suction motor for driving the blower, and a suction motor attached to the suction port body, which is turned on by landing of the suction port body, A landing detection switch for driving a brush motor; a first current detection unit for detecting a load current of the brush motor; a second current detection unit for detecting a load current of the suction motor; The larger the detection output of the current detection unit 1 is ,
And adjustment means for pre-set threshold value is adjusted to be lower, and the threshold adjusted by the adjusting means, comparing the detection output of the second current detection means, the dust collecting chamber of the garbage An electric vacuum cleaner comprising: a dust amount determining means for determining a clogging amount; and an informing means for informing the dust clogging amount in the dust collection chamber based on the determination output of the dust amount determining means. 3. The cleaner main body side, wherein the first current detection means is
And the first current detection means and the block.
Connect the motor for rush and the landing detection switch electrically in series
The vacuum cleaner according to claim 1 or 2 , characterized in that the vacuum cleaner continues .