JPH07163499A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a vacuum cleaner to efficiently reduce the power consumption and improve the cleaning efficiency. CONSTITUTION:This vacuum cleaner comprises: a handy operation board 7 whose key operation sets an electric ventilator Ma and a motor Mb to a predetermined input status automatically through a control means 34; a dust detecting processor that detects the quantity of dusts on the cleaning floor and sets the status of the cleaning floor on the basis of dirtiness; and a drive input processor that stops the drive input for the motor Mb to turn the wheels for the cleaner when the status of the cleaning floor comes into 'clean' from 'dirty' within a certain period of time. Because the cleaner movement becomes heavy when the motor Mb stops, the operator surely and easily knows that the floor is already clean, which spares the operator the work of cleaning the floor already cleaned, prevents unnecessary power consumption, and saves time for cleaning.

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 which changes the traveling speed of traveling means based on the amount of dust.

[0002]

2. Description of the Related Art Heretofore, as a vacuum cleaner for performing various controls depending on the state of dirt on a surface to be cleaned, there is known a structure disclosed in Japanese Patent Publication No. 4-4886.

The electric vacuum cleaner disclosed in this Japanese Patent Publication No. 4-4886 discloses a light emitting section composed of a plurality of light emitting elements which emit light in an air passage through which dust flows, and receives and receives light from the light emitting section. A light receiving unit that outputs a signal according to the amount is provided, and the signal from this light receiving unit is output to the display unit via the time constant circuit, and the display unit displays according to the magnitude of the output from the time constant circuit. The configuration is done.

Based on this display, the cleaning operator judges the state of dirt due to dust, and changes the suction force by manually operating a hand switch or the like to perform cleaning.

[0005]

However, in the structure described in Japanese Patent Publication No. 4-4886, even though dust is sucked from the surface to be cleaned and is clean due to oversight of the display, May continue to clean the place,
There is a problem that the cleaning efficiency is lowered and the operating cost is increased.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric vacuum cleaner capable of efficiently utilizing power consumption and improving cleaning efficiency.

[0007]

The electric vacuum cleaner of the present invention comprises:
An electric vacuum cleaner body containing an electric blower, a suction port body which opens a suction port provided in the electric vacuum cleaner body and communicated with the electric blower through an air passage, and the suction port body provided with the suction port Travel means for assisting the travel of the mouth body,
Driving means for driving the traveling means, dust detection means for detecting dust sucked from the suction port and outputting a signal in accordance with the amount of dust, and an output signal for detecting an output signal from the dust detection means and having a large amount of dust And a control means for controlling the driving means to reduce the traveling speed of the suction port main body when it is detected that the output signal has changed to a smaller output signal.

[0008]

In the vacuum cleaner of the present invention, the control means normally improves the running performance of the suction port main body, and the dust detection means detects dust, and outputs a small amount of output signal from a large amount of dust. When the change in the signal is detected, the output of the drive unit that drives the traveling unit is controlled so as to reduce the traveling property of the suction port body, so the amount of dust on the surface to be cleaned is reduced and the surface to be cleaned is cleaned. In this case, the driving means for driving the traveling means is controlled to a driving state in which the traveling speed of the suction port body is reduced, and the traveling resistance due to the deterioration of the traveling property of the suction port body causes the amount of dust on the surface to be cleaned to decrease. Make sure to notify the cleaner.

[0009]

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

In FIG. 2, reference numeral 1 denotes an electric vacuum cleaner body, and the electric vacuum cleaner body 1 has an electric blower Ma built therein.

A hose body 2 having an air passage formed therein is connected to the electric blower Ma, and a hand operating portion 3 is provided at the tip of the hose body 2. Further, at the tip of the hose body 2, a telescopic extension tube 4 forming an air passage is formed.
A suction port body 5 having a built-in electric motor Mb as a driving means is attached via the.

As shown in FIG. 3, the hand operation unit 3 is provided with an operation unit 7 such as a power control switch for driving / stopping the electric blower Ma or the electric motor Mb, or varying the output.

As shown in FIGS. 4 and 5, the suction port main body 5 has a horizontally long rectangular shape in the advancing / retreating direction, and a suction chamber 9 in which the suction port 8 is formed is defined on the lower front surface in the advancing / retreating direction. Has been formed. Then, on the rear side of the suction port body 5, an air passage chamber 10 serving as an air passage communicating with the suction chamber 9, an electric motor chamber 11 located on one side of the air passage chamber 10, and a control located on the other end side. Chamber 12
And are sectioned.

Further, a communication pipe 14 is rotatably supported at the center of the rear part of the suction port body 5, and the front end of the communication pipe 14 is rotatably fitted inside the air duct chamber 10. At the same time, the inside communicates with the suction chamber 9 through the air passage chamber 10.

Further, the communication pipe 14 is provided with a dust detecting means.
15 is provided, and this dust detection means 15 is a light emitting diode.
16 and a light receiving section for detecting light from the light emitting diode 16
17 and a light emitting diode 16 and a light receiving portion 17
Are arranged so as to face each other in the radial direction of the communication pipe 14.

As shown in FIG. 12, the dust detecting means 15 has a predetermined amount according to the amount of dust, because the light emitted from the light emitting diode 16 is blocked by the dust and the light receiving portion 17 cannot receive the light. , A different current value is output.

A driven rear wheel 19 is rotatably supported at the rear of the suction port body 5 on both sides of the communication pipe 14.

Further, a rotary blade 21 is rotatably supported in the suction chamber 9 of the suction port main body 5, and is provided so as to contact the surface F to be cleaned and project downward from the suction port 8.

Further, the suction blade body 5 has a rotary blade 21
A running wheel 22 as a running means is rotatably supported on the front side of the electric motor room 11 on both sides of the air duct room 10 as a running means by projecting below the lower surface of the suction port main body 5 on the rotary shaft 23. ing. A driven front wheel 24 is rotatably supported near both ends of the rotary shaft 23, and the suction port body 5 is placed on the surface F to be cleaned by the traveling wheel 22, the driven front wheel 24 and the driven rear wheel 19. It

On the other hand, the electric motor room 11 is provided with an electric motor Mb for rotating and driving the rotary blade 21 and the traveling wheel 22. Then, the power transmission belt 25 is stretched over the pulley 27 and the drive roller 28 fixed to the output shaft 26 of the electric motor Mb, and further, the drive belt 29 has the outer peripheral surface of the running wheel 22.
While being in contact with the pulley 30 fixed to the rotating shaft 23, the driving roller 28 and the pulley 31 fixed to the end portions of the rotating blade 21 are wound around. And these belts 25,
At 29, the rotating blade 21 and the traveling wheel 22 are rotated in opposite directions.

Further, in the control room 12, a cleaning surface detecting means 33 for detecting the state of the cleaning surface F such as a carpet, a fold, a space between boards, etc., and an adjusting means 34 for some circuit boards (not shown).
The control means 34 including a plurality of circuit boards on which a and the timing means are mounted, and the traveling direction detection means (not shown) are provided.

As shown in FIG. 6, the cleaning surface detecting means 33 is slidable in the vertical direction by being urged downward by the spring body 36 and the lower end abutting the cleaning surface F. Is provided with a sliding body 37. In addition, this slide 37
Faces the surface F to be cleaned whose lower end is flat with a slight gap, and when the surface F to be cleaned is a carpet, the driven front wheels 24,
The driven rear wheel 19 and the traveling wheel 22 sink into the carpet and contact the carpet and slide upward, and the switch portion 38 provided at the upper part is closed. The switch section is arranged so as to maintain the open state.

The advancing direction detecting means is the suction port main body 5.
The traveling direction in the front and rear direction is detected, and the electric motor Mb for rotating the rotating blade 21 and the traveling wheel 22 is driven by the control means 34 by this detection. And this drive state is
22 is rotated in the forward direction with respect to the advancing direction of the suction port body 5, the rotating blade 21 is rotated in the opposite direction, and the traveling wheel 22 and the rotating blade 21 are rotated in accordance with the traveling speed of the suction port body 5. The input of the electric motor Mb is changed so that the rotation speed becomes faster.

Next, the circuit configuration of the above embodiment is shown in FIG.
Will be described with reference to.

In FIG. 1, an electric blower Ma provided in the electric vacuum cleaner body 1 and an electric motor Mb provided in the suction port body 5 are respectively commercialized via unillustrated power control triacs. It is connected to the AC power supply E. The control means 34 incorporated in the suction port body 5 is connected to the gate of the triac. Further, to the control means 34, the surface-to-be-cleaned detection means 33 and the dust detection means 15 arranged in the suction port body 5 and the operation section 7 of the hand operation section 3 are connected, respectively. Further, the adjusting means 34a provided on the circuit board constituting the control means 34 detects signals from the surface-to-be-cleaned detection means 33 and the dust detection means 15, and sets the electric blower Ma to an input state of a predetermined ratio. Therefore, for example, a threshold value is set.

The adjusting means 34a and the timekeeping means provided on the circuit board constituting the control means 34 are the control means 34.
A circuit may be configured separately from the above, and various cleaning surface detecting means 33, control means 34, adjusting means 34a, timing means, or dust detecting means 15 may be connected to the vacuum cleaner body 1 or the suction port body 5. It can be arranged in any of the above.

Next, the specific operation of the control means 34 will be described with reference to the flow chart shown in FIG. 7 and the waveform diagram of the current value shown in FIG.

First, T = 0 indicating that the time measuring means does not measure the time, and the control means 34 does not recognize the current value of various dust detection amounts S output by the dust detection means 15 detecting the dust. That is, a = 0, which means that the amount of dust is small, which will be described later, is not detected, b = 0, which means that the amount of dust is medium, is not detected, and that the amount of dust is large, is not detected. C = 0 and n = 0 indicating that the amount of dust is not detected are set (step 1).

Next, the control means 34 reads the current from the operating portion 7 of the hand operating portion 3 (step 2) and detects the presence or absence of a current equal to or more than a predetermined threshold value to determine whether or not the hose body 2 is connected. Is detected (step 3). Then, when the current is less than or equal to the predetermined threshold value, it is determined that the hose body 2 is disconnected, and the electric blower Ma is stopped after one second while the electric blower Ma is being driven (step 4), and the process returns to step 2 to return the Is greater than a predetermined threshold value, it is determined that the hose body 2 is connected, and the process proceeds to the next.

Next, it is detected whether or not there is an input pulse of the stop setting button of the operation unit 7 (step 5), that is, when the current is within a predetermined threshold range, the stop setting button is detected. Is determined to have been operated, stop processing for stopping the electric blower Ma and the electric motor Mb is performed (step 6), and the process returns to step 2.

When the current is larger than the predetermined threshold value range, it is detected whether or not there is an input pulse of the button for automatic setting of the operation section 7 of the hand operation section 3 (step 7). That is, when the current is within the range of the predetermined threshold value, it is determined that the button for automatic setting has been operated, the electric blower Ma and the electric motor Mb, the cleaning surface detection means 33, the traveling direction detection means and the dust detection means. Based on the threshold value set by the adjusting means 34a in response to the signal from 15, the control means 34 performs an automatic process for setting a predetermined input state (step 8), and returns to step 2.

When the electric current is larger than the predetermined threshold for automatic setting, whether or not there is an input pulse of the strength setting button which constitutes the operation section 7 of the manual operation section 3 of the electric blower Ma manually. Is detected (step 9). That is,
When the current is within the range of the predetermined threshold value, it is determined that the strength setting button has been operated, and the strength processing is performed to drive the electric blower Ma in the strong and weak input states (step 1
0), return to step 2.

When the current is larger than the predetermined threshold value for setting the strength, the power constituting the operating unit 7 of the hand operating unit 3 is to drive the electric motor Mb for rotating the rotary blade 21 and the traveling wheel 22. It is detected whether or not there is an input pulse of a brush setting button (step 11).

That is, when the current is within the range of the predetermined threshold value, it is judged that the power brush setting button has been operated, and the traveling direction and traveling speed of the suction port body 5 detected by the traveling direction detecting means (not shown). Based on the above, the control means 34 sets the electric motor Mb to a predetermined input state to rotate the rotary blade 21 and the traveling wheel 22 in a predetermined direction and speed (step 12), and returns to step 1.

If the current is larger than the predetermined threshold for setting the power brush, or if the input pulse is in the standby state by the operation of the operation unit 7, it is determined by the automatic processing in step 8 whether or not the automatic operation is being performed. (Step 13). Then, when it is larger than the predetermined threshold value for setting the power brush or when it is determined that the driving state is other than the automatic operation, the process returns to step 2, the loop is circulated to the standby state, and the previous operation is maintained.

On the other hand, when it is determined in step 13 that the automatic operation is being performed, the control means 34 detects the dust detection amount S based on the output signal transmitted from the dust detection means 15 upon detection of dust.
A dust amount detection process for determining is performed (step 14). Further, based on the dust detection amount S detected in this dust amount detection process, a drive input process for setting the drive state of the electric motor Mb that rotationally drives the traveling wheels 22 is performed (step 15), and the process returns to step 2 to loop. Circulates and goes into a standby state to maintain the previous operation.

If automatic processing is set,
The operation of the flowchart shown in FIG. 9 is performed.

First, the cleaning surface F is detected by the cleaning surface detecting means 33.
The state of is detected between the carpet and tatami mats or boards, and the amount of dust is detected by the dust detection unit 15, and the threshold value for setting the electric blower Ma to a predetermined input state by the adjustment unit 34a based on these signals. The adjustment process to be set is performed (step 21). Next, based on the threshold value set by the adjusting process by the adjusting unit 34a, the control unit 34 performs an input process for driving the electric blower Ma in a predetermined input state (step 22).

Then, in the adjustment processing, the operation of the flowchart shown in FIG.
At 33, the state of the surface F to be cleaned is detected (step 24). In this detection, the contact portion 39 of the surface-to-be-cleaned detection unit 33 is the surface F to be cleaned.
Whether or not the switch portion 45 is closed is detected by the movement of the sliding body 37 against the urging force of the spring body 44 that abuts against. On the other hand, the dust detection means 15 detects the amount of dust, and based on the threshold value of the dust detection amount S and the threshold value of the state of the cleaning surface F detected by the cleaning surface detection means 33, the adjusting means 34
a sets a predetermined threshold value according to the input setting state and the dust detection amount S.

That is, when the surface F to be cleaned by the surface-to-be-cleaned detection means 33 is a tatami mat, a board, or the like, the lower limit threshold value of the dust detection amount is S ₁ , for example, 50, and the upper limit threshold value of the dust detection amount is S. ₂ , for example, 70 is set (step 25).
If the surface F to be cleaned is not in a tatami or board space,
That is, in the case of a carpet or the like, S ₁ which is the lower threshold of the dust detection amount, for example, 30 and S ₂ which is the upper threshold of the dust detection amount, for example, 50 are set (step 26). The upper and lower limit threshold values of the dust detection amount are relative set values for determining the range in which the input state of the electric blower Ma is set.

Next, in the input processing by the control means 34,
The operation of the flowchart shown in FIG. 11, that is, the threshold value S from the dust detection means 15 is set (step 28), and the threshold value S from this dust detection means 15 and the lower limit threshold value S ₁ of the dust detection amount input to the adjustment means 34a are set. And judge (Step 2
9).

If the threshold value S of the dust detection amount from the dust detection means 15 is not larger than the lower limit threshold value S ₁ of the dust detection amount set in the adjusting means, that is, if it is smaller, the input state of the electric blower Ma Is set to "Small" (Step 3
0).

When the dust detection amount threshold S is larger than the dust detection amount lower limit threshold S ₁ , the dust detection amount threshold S from the dust detection means 15 and the dust detection amount input to the adjusting means 34a. Is compared with the upper limit threshold S _{2 of}
1).

If the dust detection amount threshold value S from the dust detection means 15 is not larger than the dust detection amount upper limit threshold value S ₂ set in the adjusting means 34a, that is, if it is smaller, the input of the electric blower Ma is performed. Set the state to "medium" (step 32).

If the dust detection amount threshold S is larger than the dust detection amount upper limit threshold S ₂ , the input state of the electric blower Ma is set to "large" (step 33).

In this way, as shown in FIGS. 10 and 11, the input state of the electric blower Ma is set by the surface to be cleaned F and the amount of dust sucked.

On the other hand, in parallel with the automatic processing for setting the input state of the electric blower Ma, the dust amount detection processing of step 14 is performed.

Then, in the dust amount detection processing, it is judged whether or not the operation of the flowchart shown in FIG. 13, that is, T = 0 indicating that the time counting means of the control means 34 is not counting (step 41).

When T = 0 indicating that the time is not measured, the control means detects the current value of the dust detection amount S output by the dust detection means detecting the sucked dust. Then, the amount of dust on the surface F to be cleaned of the portion cleaned by the suction port body 5 is detected.

That is, the current value of the dust detection amount S from the dust detection means 15 is, for example, 3 when the detected dust amount is small.
It is determined whether 0% or more (S ≧ 30) (step 41).
Then, the dust detection amount S is not 30% or more, that is, 3
When it is less than 0% (S ≦ 30), a + 1 indicating that the amount of dust is small is set to a + 1 and integrated (step 42).

On the other hand, the dust detection amount S is 30% or more (S ≧ 3
In the case of 0), the detected dust amount is large, for example 70
It is determined whether or not% (S ≧ 70) (step 43). Then, the dust detection amount S is not 70% or more, that is, 70
If it is less than% (S ≦ 70), b + 1 indicating that the dust amount is medium is set to b + 1 and integrated (step 44).
When the dust detection amount S is 70% or more (S ≧ 70), c + 1, which means that the dust amount is large, is set to c + 1 and integrated (step 45).

Thereafter, n + 1, which indicates the number of times the dust amount has been detected, is set to n + 1 and integrated (step 46).

Next, it is judged whether n is 10 or more,
That is, the above dust amount detection was performed 10 times or more (n
It is determined whether or not (≧ 10) (step 47). Then, when the detection of the dust amount is not performed 10 times or more (n ≦ 10), the process returns to step 41, and the dust amount is detected again.

When the amount of dust is detected 10 times or more (n ≧ 10), the number of times a, which means that the amount of dust is small, is greater than the number of times b, which means that the amount of dust is medium. (A>
b) is determined (step 48), and if the number of times of a is greater than the number of times of b (a> b), the number of times of a is greater than the number of times of c indicating that the dust amount is large (b> It is determined whether it is c) (step 49).

The number of times a is greater than the number of times c (a
> C), D = 1 is set to the effect that the amount of dust is small and the surface F to be cleaned is relatively clean (step 50). Also,
When the number of times of a is not more than the number of times of c, that is, when the number of times of a is less than or equal to the number of times of c (a ≦ c), D = 3 indicating that the amount of dust is large and the surface F to be cleaned is dirty is set. Do (step
51).

On the other hand, in step 48, if the number of times of a is not more than the number of times of b, that is, the number of times of a is less than or equal to the number of times of b (a ≦ b), it means that the amount of dust is medium b. Is larger than the number of times c, which means that the amount of dust is large (b> c)
It is determined whether or not (step 52). If the number of times of b is greater than the number of times of c (b> c), D = 2 is set to the effect that the amount of dust is medium and the surface F to be cleaned is medium dirty (step 53). Further, when the number of times of b is not more than the number of times of c, that is, the number of times of b is not more than the number of times of c (b ≦
For c), proceed to step 51.

Then, in steps 50, 51 and 53, after setting the dirt state D of the surface F to be cleaned, respectively, a = 0 indicating that the fact that the amount of dust is small is not detected, and the amount of dust is medium B = 0 indicating that a certain amount is not detected, c = 0 indicating that a large amount of dust is not detected, and n = 0 indicating that the amount of dust is not detected are respectively set (step 54), proceed to the next.

Next, in the drive input processing, it is judged whether or not the operation of the flowchart shown in FIG. 14, that is, T> 0 indicating that the time measuring means of the control means 34 is measuring time (step 61). Further, when T> 0 indicating that the timing means is not timing, that is, when T = 0 indicating that the timing means is not timing, the surface F to be cleaned is relatively clean. It is determined whether or not D = 1 (step 62).

If D = 1, which indicates that the surface F to be cleaned is relatively clean, is determined whether D = 2, which indicates that the surface F to be cleaned is moderately dirty (step 63). ), D = 2
In the case of, the drive input state of the electric motor Mb is set to "medium" (step 64). When D = 2 is not satisfied, that is, when D = 3, the traveling speed of the suction port body 5 is reduced and dust is reliably sucked from the surface F to be cleaned. Therefore, the drive input state of the electric motor Mb is set to " Set to "Small" (step 6)
Five).

On the other hand, in step 62, when D = 1 indicating that the surface F to be cleaned is relatively clean, the area before D = 1 stored in the storage unit (not shown) of the control means 34 is stored. Cleaning surface F
It is judged whether or not the dirt state D is D = 3 indicating that the surface F to be cleaned is dirty (step 66), and D before 1 is D.
If it is not = 3, considering the operability of the suction port body 5,
Set the drive input state of the electric motor Mb to "Large" (step
67).

In step 66, the dirt state D of the surface to be cleaned F before D = 1 indicates that the surface to be cleaned F is D =
If it is 3, the time is measured from T = 0 (step
68).

After this, it is judged whether the time measured by the time measuring means is less than 5 seconds (T <5) (step 69), and the time measured by the time measuring means is not less than 5 seconds, that is, when the time is 5 seconds or more. In (T ≧ 5), T = 0 indicating that the time counting means of the control means 34 is not counting is set (step 7
0), the process proceeds to step 67, and in consideration of the operability of the suction port body 5, the drive input state of the electric motor Mb is set to "large".

The time measured by the time measuring means is less than 5 seconds (T
In the case of <5), the drive input state of the electric motor Mb is stopped (step 71).

By stopping the drive input state of the electric motor Mb in step 71, the running resistance of the suction port main body 5 increases, and the running property of the suction port main body 5 is impaired. For this reason, the cleaning worker can easily and surely recognize that the portion of the suction port body 5 which has been cleaned by cleaning is clean and clear by the running property of the suction port body 5 without checking the display or the like. it can.

Therefore, the cleaning worker recognizes that the surface F to be cleaned has been cleaned, and moves the suction port main body 5 to another portion for cleaning, so that the cleaning can be performed by overlooking the display. It is possible to prevent repeated cleaning of the portion of the surface F to be cleaned, which can prevent unnecessary consumption of electric power, shorten the cleaning time, and perform efficient cleaning.

In a normal case, the control means 34 controls the drive input state of the electric motor Mb so as to improve the running performance of the suction inlet body 5, so that the operability of the suction inlet body 5 can be improved. The cleaning workability can be improved.

In this embodiment, in the drive input process, the process of stopping the drive input of the electric motor Mb is described as the process of lowering the traveling property of the suction port body 5, but the drive input state is set to "extremely small". The same effect can be obtained by setting the above state or by setting the rotation direction of the traveling wheel 22 to be reverse to the traveling direction of the suction port body 5. Further, when the dirt state D of the surface to be cleaned F is D = 3,
Although the description has been made by controlling the state of the drive input that reduces the traveling property of the suction port body 5, the control may be performed even when D = 2.

Further, the cleaning surface detecting means 33 and the adjusting means
Although the description has been given by providing the 34a and controlling the driving state of the electric blower Ma, the cleaning target surface detection means 33 and the adjusting means 34a may not be provided, or the drive of the electric blower Ma may not be automatically controlled.

Further, although the traveling wheels 22 are used as the traveling means, the rotating blade 21 may be used as the traveling means for assisting the traveling performance of the suction port body 5.

A rotary brush may be used instead of the rotary blade 21.

[0071]

According to the electric vacuum cleaner of the present invention, when the control means detects a small output signal from an output signal of a large amount of dust from the dust detection means, the control means drives the suction port body so as to reduce the traveling property thereof. In order to control the output of the means, during normal cleaning, the running performance of the suction port main body can be improved for efficient cleaning, and when the surface to be cleaned becomes clean, the running performance of the suction port main unit will decrease The resistance can be notified to the cleaner reliably and the cleaning efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an electric vacuum cleaner of the present invention.

FIG. 2 is a perspective view showing an appearance of the same electric vacuum cleaner.

FIG. 3 is a perspective view showing a manual operation part of the hose body.

FIG. 4 is a partially cutaway plan view showing the suction inlet main body.

FIG. 5 is a side view with a part thereof cut away.

FIG. 6 is a partially cutaway side view showing the cleaning surface detection unit.

FIG. 7 is a flowchart for explaining the operation of the above control means.

FIG. 8 is a waveform diagram of a current value of the same as above.

FIG. 9 is a flowchart explaining the operation of the automatic processing of the above control means.

FIG. 10 is a flowchart for explaining the operation of the adjustment processing of the above adjustment means.

FIG. 11 is a flowchart for explaining the operation of the input processing of the above control means.

FIG. 12 is an explanatory diagram illustrating a detection state of the dust detection unit and an input state of the electric blower and the electric motor.

FIG. 13 is a flowchart for explaining the operation of the dust amount detection processing of the above control means.

FIG. 14 is a flowchart explaining the operation of drive input processing of the control unit.

[Explanation of symbols]

 1 Electric Vacuum Cleaner Main Body 5 Suction Port Main Body 8 Suction Port 15 Dust Detection Means 22 Traveling Wheels as Traveling Means 34 Control Means Ma Electric Blower Mb Electric Motors as Driving Means

Claims (1)

[Claims] 1. An electric vacuum cleaner body having a built-in electric blower, a suction port main body which is provided in the electric vacuum cleaner main body and which opens a suction port communicating with the electric blower via an air passage, and the suction port main body. Traveling means for assisting the traveling of the suction port main body, driving means for driving the traveling means, dust detection means for detecting dust sucked from the suction port and outputting a signal according to the dust amount, And a control means for controlling the driving means to decrease the traveling speed of the suction port main body when detecting an output signal from the dust detection means and detecting a change from an output signal with a large amount of dust to a low output signal. An electric vacuum cleaner characterized by that.