JP2007105357A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner which secures high input setting by suppressing power source harmonics with no regard to vibrations or noises from an electronic blower. <P>SOLUTION: The vacuum cleaner is provided with an input selection means 5 for selecting a plurality of inputs to an electronic blower 2, and an input setting means 4 for determining the plurality of input values selected by the input selection means 5. The input setting means 4 is designed to set the plurality of input values outside a prescribed harmonic band, based upon the maximum input value of the electronic blower 2. Therefore, when the inputs are determined, input ranges with high harmonics that are determined according to the maximum input value of the electronic blower 2 can be avoided in advance, which makes it possible to suppress power source harmonics without requiring complicated control of changing phase angles at every Hertz as in the conventional way. Thus, this vacuum cleaner is capable of securing high input setting with no regard to vibrations or noises from the electronic blower 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to control for reducing harmonics, particularly in a vacuum cleaner used in a general household.

  Along with the higher input of vacuum cleaners, countermeasures against power supply harmonic currents (especially odd harmonics 3rd, 5th, 7th, etc .: 150Hz, 250Hz, 350Hz ... when the fundamental frequency is 50Hz) are becoming issues. For example, the method shown in Patent Document 1 is used.

  FIG. 14 shows an example of a conventional configuration, and FIG. 15 shows a voltage change diagram according to a conventional control method. Hereinafter, description will be made based on this figure.

  A power supply motor 102 is connected in series to a power source 102, and a triac 103, which is a bidirectional thyristor for controlling the phase of the voltage applied to the motor 102, is connected in series. The generator 104 for changing the input of the vacuum cleaner body is connected to the gate of the triac 103. In the vacuum cleaner, the motor 102 is an electric blower. Hereinafter, the motor and the electric blower are the same.

In the above configuration, the triac 103 is alternately turned on every hertz at a small phase angle α1 and a large phase angle α2 by a signal from the generator 104, and a voltage as shown in FIG. 14 is applied to the electric blower 102. . In addition, the power supply harmonic current becomes two types of power supply harmonic components generated at the phase angle α1 and power supply harmonic components generated at the phase angle α2, and the power supply harmonics generated as a whole by canceling out the odd harmonics. The waves were to drop.
JP-A 63-274396

  However, in the configuration as described above, when the electric blower 102 is driven, the voltage applied to the electric blower changes every cycle, so the vibration and abnormal noise of the electric blower are expanded, and the vibration and abnormal noise are increased. It is transmitted to the user from the main body of the vacuum cleaner and causes a decrease in usability due to noise and vibration. Further, if the electric blower is increased in input in order to improve the suction performance of the electric vacuum cleaner, the current flowing through the electric blower further increases, and the harmonic current naturally increases accordingly. In this case, in order to reduce the harmonic current, it is necessary to increase the phase difference between the two phase angles α1 and α2 in the above control method. There was a problem that led to expansion.

  An object of the present invention is to solve the above-mentioned problem, and to provide a vacuum cleaner that can control a motor blower to suppress power supply harmonics, suppress vibrations from the motor blower, abnormal noise, and ensure high input. To do.

  The present invention comprises an electric blower that generates suction air, input selection means for selecting a plurality of inputs to the electric blower, and input setting means for determining a plurality of input values selected by the input selection means, The input setting means is configured to set the plurality of input values according to the maximum input value based on the maximum input value of the electric blower, and to set the input value outside a predetermined harmonic band. In order to change the input of the electric blower, when performing the phase control that has been generally performed in the past, the input is determined by avoiding the high harmonic input area determined according to the maximum input value of the electric blower in advance. This eliminates the need for complicated control of changing the phase angle for each hertz as in the above-described conventional example, and can suppress power supply harmonics, so that vibration and noise from the electric blower are a concern. Na , It is possible to provide an electric vacuum cleaner high input can be secured.

  An electric blower for generating suction air; input selection means for selecting a plurality of inputs to the electric blower; and input setting means for determining a plurality of input values to be selected by the input selection means. Based on the maximum input value of the electric blower, the plurality of input values are set according to the maximum input value, and the input value is set to be outside a predetermined harmonic band. In order to change, when performing the phase control that has been generally performed conventionally, by deciding the input avoiding the high harmonic input region determined according to the maximum input value of the electric blower in advance, It does not require complicated control of changing the phase angle for each hertz as in the conventional example, and power supply harmonics can be suppressed. It is possible to provide a vacuum cleaner that can be secured.

  The second invention is a vacuum cleaner configured by a maximum input detecting means for determining a maximum input value by a current flowing through the electric blower, and is estimated by a current flowing through the electric blower when determining the maximum input value of the electric blower. Thus, it is possible to detect the maximum input value of the electric blower with high accuracy and low cost using a current sensor that is generally spread.

  3rd invention has a voltage detection means which detects the power supply voltage applied to a vacuum cleaner, and the input which an input setting means sets out of a predetermined | prescribed harmonics band according to the voltage detected by the said voltage detection means By providing the power supply voltage input correcting means for correcting the value, the input value can be corrected outside the predetermined harmonic band even when the voltage fluctuates and a high voltage is detected. In other words, when the voltage is high, the current that flows through the electric blower increases and the harmonic current also increases.Therefore, the input value set outside the predetermined harmonic band before voltage fluctuation falls within the predetermined harmonic band and needs to be corrected. is there. Therefore, by detecting the power supply voltage applied to the vacuum cleaner and correcting the input value set outside the predetermined harmonic band, even if the power supply voltage fluctuates, it is set so that the power supply harmonic does not exceed the predetermined value. Power supply harmonics can be suppressed.

  4th invention has the frequency detection means which detects the power supply frequency applied to a vacuum cleaner, and the input which an input setting means sets out of a predetermined | prescribed harmonics band according to the frequency detected by the said frequency detection means By providing the frequency input correction means for correcting the value, the input value can be corrected outside the predetermined harmonic band even when the frequency fluctuates and a high frequency is detected. In other words, when the frequency is high, the current flowing through the electric blower increases and the harmonic current also increases.Therefore, the input value set outside the predetermined harmonic band before the frequency fluctuation falls within the predetermined harmonic band and needs to be corrected. is there. Therefore, by detecting the power supply frequency applied to the vacuum cleaner and correcting the input value set outside the specified harmonic band, even if the power supply frequency fluctuates, it is set so that the power supply harmonic does not exceed the specified value. Power supply harmonics can be suppressed.

  The fifth invention has manual adjustment means that can manually adjust an input value outside the predetermined harmonic band set by the input setting means within a predetermined range, so that the user can use the vacuum cleaner. During use, when the air volume decreases due to the accumulation of dust in the dust collection chamber and the electric blower input decreases, manual adjustment means can be adjusted to increase the input so that the harmonics do not exceed the predetermined level. Therefore, it is possible to provide a vacuum cleaner that can prevent a reduction in suction force, is easy to use, and can suppress power harmonics.

  According to the sixth aspect of the present invention, since the manual adjustment means is provided in the vicinity of the outline of the main body so that it can be adjusted after assembling the main body of the vacuum cleaner, the user can easily perform the adjustment operation, thereby improving usability.

  According to the seventh aspect of the present invention, since the manual adjustment means is also used as the input selection means, it is not necessary to newly provide a mechanical manual adjustment means, so that a low-cost electric vacuum cleaner can be provided.

  According to an eighth aspect of the present invention, there is provided input fluctuation detecting means for detecting electric fan blower input fluctuation when using the vacuum cleaner, and the input setting means is out of a predetermined harmonic band according to the detected amount detected by the input fluctuation detecting means. By providing a fluctuation correction means that corrects the input value to be set in, the usage situation in which the user is performing the cleaning work, mainly the amount of dust accumulation is estimated, and accordingly it is set outside the predetermined harmonic band. The input value can be corrected. For example, when the amount of dust accumulated in the dust collection chamber is small, the air volume of the vacuum cleaner is large and the load applied to the electric blower is small, so that a high current flows, the harmonic current is high, and the input of the electric blower is also high. That is, the input of the electric blower fluctuates according to the change in the amount of accumulated dust in the dust collection chamber, and the harmonic current also fluctuates. Therefore, the range of the specified harmonic band fluctuates, and by correcting the input value set outside the specified harmonic band accordingly, even if the power supply harmonic fluctuates according to the usage situation, Therefore, it is possible to provide a vacuum cleaner that can keep the value within a predetermined value.

(Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In addition, this invention is not limited by this embodiment.

  FIG. 1 is a perspective view of a vacuum cleaner in the present embodiment, and FIG. 2 is a control block diagram. In FIG. 2, reference numeral 1 denotes control means for controlling the power supplied to the electric blower 2 that generates suction air. 3 is an input detection means for detecting the input to the electric blower and the maximum input value of the electric blower, and 4 is an input setting means for determining the input values of the vacuum cleaner multiple input positions. Reference numeral 5 denotes an input selection means that allows a user to freely select inputs of a plurality of electric vacuum cleaners. Information on the selected input position is transmitted to the control means 1 through the input setting means 4.

  FIG. 3 is a circuit in which the control means 1 for controlling the voltage applied to the electric blower 2 is configured using a triac 10.

  The operation of the above configuration will be described. In the present embodiment, the description will be made assuming that three input positions are provided so that the user can adjust and select the suction force of the vacuum cleaner according to the intended use. The positions to be provided are the maximum input position A whose firing angle is 0 ° or almost 0 °, the middle input position B lower than the input, and the low input position C as shown in FIG.

  First, the user turns on the power and selects the input position by the input selection means 5. The information is transmitted to the input setting means. In this embodiment, the medium input position B and the low input position C are determined according to the maximum input value of the electric blower. In order to detect the maximum input value by means 3, the operation is performed at the position A for a certain time regardless of which position is selected. Then, after detecting the maximum input value, based on the information, the input setting means determines the input values of the positions B and C, that is, the firing angles αB and αC to be equal to or lower than a predetermined harmonic. After that, the input setting means 4 supplies a current to the gate of the triac 101 which is the control means 1 so as to control to the firing angle of the position selected first. Next, when the user selects a position again, the information on the positions A, B, and C selected by the input selection means 5 is transmitted to the input setting means 4, and the input setting means 4 is based on the information. In order to control the firing angles 0 °, αB, and αC corresponding to the A, B, and C positions determined by the above operation, a current is caused to flow to the gate of the triac 101 of the triac 101 that is the control means 1. . Each firing angle is fixed every cycle at each position (does not change every cycle).

  Further, as shown in FIG. 5, the harmonic current level varies according to the maximum input value of the electric blower. Therefore, αB1 and αC1 indicate predetermined harmonic currents such as the firing angle when the input N1 at the maximum input position A is high, and αB2 and αC2 indicate the firing angle when the input N2 at the maximum input position A is low. It is a feature of the present invention that the firing angles of the positions B and C are individually set according to each maximum input value so as not to exceed.

  Next, the case where the maximum input value of the electric blower 2 fluctuates will be described.

  In general, when a predetermined voltage is applied to the electric blower 2, when the maximum input value of the electric blower 2 is high (input when the firing angle is 0 °), a high current flows through the electric blower 2. growing. The method of measuring the harmonic current of the vacuum cleaner is IEC input when each position is open (the air volume is maximum and the maximum input value is the same with the suction port of the vacuum cleaner open) (Hereinafter referred to as “open input”) and input (hereinafter referred to as “closed input”) of the median value between the input (hereinafter referred to as “closed input”) when sealed (the air intake of the vacuum cleaner main body is sealed) and the same input. )) To measure power supply harmonics. Further, when phase control is performed, the harmonic current increases as the firing angle approaches 90 °. Therefore, as shown in FIG. 6, the relationship between the input and the harmonic current has a mountain shape. Therefore, even if the firing angle of the electric blower with a high opening input at position A and the electric blower with an input with low opening input at position A are the same, a difference occurs in the harmonic current value.

  Therefore, in order to suppress the harmonic current due to variation in the open input at position A, first, the maximum open input of the electric blower 2 (same as the open input at position A and hereinafter referred to as the maximum open input) is input detection means 3. Detect by. This is to detect how much the current maximum open input is higher than the average maximum open input. In other words, as described above, when the input is a high maximum open input, the harmonic current is increased as a whole. In the case of an average maximum open input, the firing angle αB of position B and the firing angle αC of position C are set so as not to exceed a predetermined harmonic current, but the maximum open input is high as it is. If it is applied to control the electric blower 2, it will exceed a predetermined harmonic current as shown in FIG. Therefore, it is necessary to change the firing angle αB at position B and the firing angle αC at position C. For position B, the harmonic current is reduced by decreasing the firing angle αB, and the harmonic current is decreased by increasing the firing angle αC of position C. That is, the maximum opening input of the electric blower 2 is detected by the input detection means 3 and the information is transmitted to the input setting means 4, the firing angle of each position is determined according to the maximum opening input, and the input selection means 5 selects it. The input setting means 4 controls the gate current of the triac 101 in consideration of the information on the position. Thereby, even in the electric blower 2 having a high maximum open input, it is possible to provide a vacuum cleaner that suppresses the harmonic current while maintaining the maximum open input.

  Further, as in the electric blowers A and B shown in FIG. 7, the difference in the characteristics of the input (ignition angle) and the harmonic current is caused by the difference in the structure of the electric blower 2, and the same maximum open input and the same point. Even at the arc angle, the harmonic current value is different. Therefore, the firing angle that is greater than the predetermined harmonic current value differs depending on the type of the electric blower 2. Therefore, the correlation between the firing angle, maximum open input, and harmonic current for each type of electric blower 2 is determined, and the firing angle of each position determined by the maximum open input and the type of electric blower is pre-patterned based on the correlation. Provide a vacuum cleaner that can easily accommodate even a plurality of electric blowers with different characteristics by efficiently storing multiple patterns in a storage means (not shown) and selecting them, and efficiently suppressing harmonic currents You can also

(Embodiment 2)
Hereinafter, the present embodiment will be described with reference to FIGS. In addition, about the same thing as FIG. 2, the same code | symbol is provided and description is abbreviate | omitted. Further, the same portions and the same control units as those in the first embodiment are denoted by the same terms and the description thereof is omitted.

  FIG. 8 is a control block diagram of the electric vacuum cleaner in the present embodiment. FIG. 9 is a relationship diagram between the maximum input of the vacuum cleaner to which the influence by voltage and the influence by frequency are added and the harmonic current value when the input is varied.

  The structure of an Example is shown below.

  Reference numeral 6-1 denotes a voltage detection unit which detects a power supply voltage applied to the vacuum cleaner and transmits input correction information to the input setting unit 4 via the power supply voltage input correction unit 7-1. Similarly, 6-2 is a frequency detection unit that detects a power supply frequency and transmits input correction information to the input setting unit 4 through the frequency input correction unit 7-2.

  The relationship between the power supply voltage, power supply frequency and harmonic current will be described, and the operation of the present embodiment in the above configuration will be described.

  In general, when the power supply voltage applied to the electric blower 2 is high and when the power supply frequency is high, a high current flows through the electric blower 2, so that the harmonic current becomes large. Therefore, as shown in FIG. 6, the firing angle of the electric blower is the same when the power supply voltage and power supply frequency are higher than the normal time (reference voltage and reference frequency) and when normal (reference voltage and reference frequency). Even if there is, a difference occurs in the harmonic current value.

  The power supply voltage value detected by the voltage detection means 6-1 is transmitted to the power supply voltage input correction means 7-1. The power supply voltage input correction means 7-1 compares the received current power supply voltage value with a predetermined voltage value (in this embodiment, the standard voltage of the country used, for example, 100V in Japan). If the result is larger than the predetermined voltage value, information is transmitted to the input setting means 4 so as to correct the firing angle of each position. That is, as the power supply voltage increases as shown in FIG. 9, a larger current flows therethrough, so that the harmonic current value increases even if the firing angle of the electric blower is the same. Therefore, when the detected voltage is larger than a predetermined voltage value, the harmonic current exceeds the predetermined value in the setting of the firing angle αB at the position B and the firing angle αC at the position C in the normal time (reference voltage). Therefore, it is necessary to correct so as not to exceed the predetermined value. For the position B, the harmonic current is reduced by reducing the firing angle αB, and the harmonic current is reduced by falling within a predetermined value by increasing the firing angle αC of the position C. That is, the power supply voltage applied to the electric blower 2 is detected and detected by the voltage detection means 6-1, and compared with a predetermined voltage by the power supply voltage input correction means 7-1, and the firing angle is corrected according to the voltage difference. The value is transmitted to the input setting means 4. The input setting means 4 receives the information and controls the gate current of the triac 101. Thereby, even when the power supply voltage fluctuates and becomes high, the power supply harmonics can be reliably set so as not to exceed the predetermined value, and a vacuum cleaner that suppresses the harmonic current can be provided. Become.

  The same applies to the power supply frequency, and the power supply frequency detected by the frequency detection means 6-2 is transmitted to the frequency input correction means 7-2. The frequency input correction means 7-2 compares the received current power supply frequency with a predetermined frequency, and as a result, the predetermined frequency (in this embodiment, the standard voltage of the country used. For example, 50Hz or 60Hz in Japan). If it is larger than that, since a larger current flows, the firing angles αB and αC are corrected. For the position B, the harmonic current is reduced by reducing the firing angle αB, and the harmonic current is reduced by falling within a predetermined value by increasing the firing angle αC of the position C. In other words, the power supply frequency applied to the electric blower 2 is detected and detected by the frequency detection means 6-2, compared with a predetermined frequency by the frequency input correction means 7-2, and the correction value of the firing angle corresponding to the frequency difference. Is transmitted to the input setting means 4. The input setting means 4 receives the information and controls the gate current of the triac 101. Thereby, even when the power supply frequency fluctuates and becomes high, the power supply harmonics can be reliably set so as not to exceed the predetermined value, and a vacuum cleaner that suppresses the harmonic current can be provided. Become.

(Embodiment 3)
Hereinafter, the present embodiment will be described with reference to FIGS. 2 that are the same as those in FIG. Further, the same parts and the same control units as those in the first and second embodiments are denoted by the same terms and the description thereof is omitted.

  FIG. 10 is a control block diagram of the electric vacuum cleaner in the present embodiment. FIG. 11 shows an example of the circuit configuration.

  The configuration of this embodiment is shown below.

  Reference numeral 8 in FIG. 10 denotes manual adjustment means for setting the input value for each position and then manually adjusting the set input value within a predetermined range. Information from the adjusting means is transmitted to the input means 4. The manual adjustment means 8 is realized by the circuit configuration shown in FIG. By changing the resistance value of the adjustment resistor VR9, the voltage input to the port of the microcomputer 11 which is also the input setting means 4 can be adjusted. Depending on the voltage, the firing angle of the triac 10 can be varied and finely adjusted.

  The operation of this embodiment in the above configuration will be described.

  For example, when the user is using the vacuum cleaner, the filter provided on the upstream side of the electric blower is clogged with fine dust, and the electric blower input is reduced compared to the initial use. When the user wants to increase the input because the input has decreased and the setting input set by the input setting means 4 is adjusted, the firing angle of the triac 101 can be changed by changing the resistance value of VR9 by human means. Can be varied. At this time, by storing the maximum open input and firing angle αB, αC information in the initial stage of use in the memory 12, the harmonic currents set in the initial stage of use of the firing angles αB, αC that do not exceed a predetermined value. Recognizing the limit value, it is possible to adjust the firing angles αB and αC to the limit value even if the input of the electric blower falls, and to increase the input of the electric blower within the range where the harmonic current does not exceed the predetermined value , The usability can be improved.

  Further, since it must be adjusted by human means after the vacuum cleaner main body is completed, it is desirable that the main body of the vacuum cleaner can be realized without disassembling such as providing an adjusting means near the outline of the main body or using wireless means. Furthermore, since the input selection means 5 is generally provided outside the main body or outside the main body for operation by the user, the input selection means 5 and the manual adjustment means 8 can be used in common without providing new adjustment means. Can be adjusted.

  In addition, since it can adjust after a vacuum cleaner main body completion, it is useful also as an adjustment means in a vacuum cleaner assembly line.

(Embodiment 4)
Hereinafter, the present embodiment will be described with reference to FIGS. In addition, about the same thing as FIG. 1, FIG. 2, the same code | symbol is provided and description is abbreviate | omitted. In addition, the same parts and the same control units as in the first to third embodiments are denoted by the same terms and the description thereof is omitted.

  FIG. 12 is a control block diagram of the electric vacuum cleaner in the present embodiment. FIG. 13 shows changes in input at each position depending on the amount of dust in the dust collecting means 15 and the air volume of the vacuum cleaner.

  The configuration of this embodiment is shown below.

  Reference numeral 13 denotes input fluctuation detection means for detecting input fluctuations at the time of using the vacuum cleaner constantly or intermittently. The input fluctuation information detected by the input fluctuation detecting unit 13 is transmitted to the fluctuation correcting unit 14. The correction input value of the electric blower output by the fluctuation correction unit 14 is transmitted to the input setting unit 4. Reference numeral 15 denotes dust collecting means, and 16 denotes dust detecting means for detecting the amount of dust in the dust collecting means 15. The detected dust amount information is also transmitted to the input setting means 4.

  The operation of this embodiment in the above configuration will be described.

  When the user starts cleaning, the dust amount detection means 16 detects the accumulated amount of dust in the dust collection means 15 constantly or intermittently, outputs information to the input setting means 4, and receives the information. Compares the current dust accumulation amount with a predetermined dust accumulation amount (for example, a dust accumulation amount that is ½ input). As described above, in IEC, the harmonic current at 1/2 input is determined to be within a predetermined value. Therefore, the firing angles αB and αC of the positions B and C are set so that the harmonic current at the 1/2 input falls within a predetermined value. However, in practice, when the input is open (there is no dust accumulation and the air volume is maximum) and the current dust accumulation amount is smaller than the predetermined dust accumulation amount, the load on the electric blower 2 is small (the dust accumulation amount). (See FIG. 13 for the relationship between the input and the air volume.) The value is larger than the current value flowing through the electric blower 2 at the time of 1/2 input. Therefore, with respect to position B, the harmonic current can be reduced by decreasing the firing angle αB, and the harmonic current can be decreased and kept within a predetermined value by increasing the firing angle αC of position C. On the other hand, when the amount of accumulated dust is large, the load on the electric blower 2 is increased, so that the current value flowing through the electric blower 2 at the time of 1/2 input becomes smaller and the input also decreases. Therefore, by reducing the firing angle in both positions B and C, the input can be increased to a ½ input value while keeping the harmonic current within a predetermined value, and the usability can be improved.

  Also, as can be seen from FIG. 13, the amount of dust accumulated is related to the input or air volume, so the amount of dust accumulated can be estimated from the input of each position when there is no accumulated amount and the current input. In addition, it is possible to detect and estimate the air volume in the intake path with an air volume sensor.

  In addition, there are a method of detecting the amount of dust passing using infrared rays and estimating the amount of accumulation, and a method of directly detecting the amount of accumulation using a weight sensor.

  As described above, the electric vacuum cleaner according to the present invention includes an electric blower that generates suction air, an input selection unit that selects a plurality of inputs to the electric blower, and a plurality of input values that are selected by the input selection unit. Input setting means for determining, based on the maximum input value of the electric blower, the input setting means sets the plurality of input values according to the maximum input value, and the input value has a predetermined harmonic band By adopting a configuration that is set to the outside, when changing the input of the electric blower, when performing phase control that has been generally performed conventionally, the harmonics determined according to the maximum input value of the electric blower Since the input is determined while avoiding a high input area in advance, the power supply harmonics can be suppressed without requiring the complicated control of changing the phase angle for each hertz as in the above-described conventional example. Without having to worry about the Luo vibration and noise, it is out to provide an electric vacuum cleaner that high input can be secured.

The perspective view of the electric vacuum cleaner in Embodiment 1 of this invention Control block diagram according to Embodiment 1 of the present invention The circuit block diagram for driving the electric blower in Embodiment 1 of this invention The relationship figure of the input of the electric motor cleaner in each position from which the input in the open state of the cleaner in Embodiment 1 of this invention differs, and the air volume of an electric motor cleaner Relational diagram between each firing angle and harmonic current in Embodiment 1 of the present invention Relationship diagram between the maximum input of the electric vacuum cleaner in Embodiment 1 of the present invention and the harmonic current value when the input is varied The relationship figure of the harmonic current value when the maximum input of the vacuum cleaner at the time of using the electric blower from which the characteristic in Embodiment 1 of this invention differs, and the input are varied Control block diagram in Embodiment 2 of the present invention The relationship between the maximum input of the vacuum cleaner to which the influence by the voltage and the influence by the frequency in the second embodiment of the present invention are added and the harmonic current value when the input is varied Control block diagram in Embodiment 3 of the present invention The figure which shows an example of the circuit structure in Embodiment 3 of this invention. Control block diagram in Embodiment 4 of the present invention The figure which showed the input change of each position by the amount of dust and the air volume of a vacuum cleaner in Embodiment 4 of this invention Circuit diagram of a conventional vacuum cleaner Operation explanatory diagram of a conventional vacuum cleaner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control means 2 Electric blower 3 Input detection means 4 Input setting means 5 Input selection means 6-1 Voltage detection means 6-2 Frequency detection means 7-1 Power supply voltage input correction means 7-2 Frequency input correction means 8 Manual adjustment means 13 Input fluctuation detection means 14 Fluctuation correction means 15 Dust collection means 16 Dust amount detection means

Claims (8)

An electric blower for generating suction air; input selection means for selecting a plurality of inputs to the electric blower; and input setting means for determining a plurality of input values to be selected by the input selection means. A vacuum cleaner configured to set the plurality of input values based on a maximum input value of the electric blower and to set the input values outside a predetermined harmonic band. The electric vacuum cleaner according to claim 1, further comprising a maximum input detecting means for determining a maximum input value based on a current flowing through the electric blower. A power supply voltage having voltage detection means for detecting a power supply voltage applied to the vacuum cleaner, and correcting an input value set by the input setting means outside a predetermined harmonic band according to the voltage detected by the voltage detection means 3. The electric vacuum cleaner according to claim 1, further comprising an input correction unit. Frequency input having frequency detection means for detecting the power supply frequency applied to the vacuum cleaner, and correcting the input value set by the input setting means outside the predetermined harmonic band according to the frequency detected by the frequency detection means The electric vacuum cleaner according to any one of claims 1 to 3, wherein a correction means is provided. The electric cleaning according to any one of claims 1 to 4, further comprising manual adjustment means capable of manually adjusting an input value outside the predetermined harmonic band set by the input setting means within a predetermined range. Machine. 6. The electric vacuum cleaner according to claim 5, wherein the manual adjustment means is provided in the vicinity of the outer shell of the main body so as to be adjusted after the main body of the electric vacuum cleaner is assembled. 6. The electric vacuum cleaner according to claim 5, wherein the manual adjustment means is also used as the input selection means. An input fluctuation detecting means for detecting fluctuations in the electric blower input when the vacuum cleaner is used is provided, and an input value set by the input setting means outside the predetermined harmonic band is determined according to the detection amount detected by the input fluctuation detecting means. The vacuum cleaner according to any one of claims 1 to 7, further comprising a fluctuation correction unit that corrects the fluctuation.

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