JPH04244123A - Suction cleaner and operating method thereof - Google Patents

Abstract

PURPOSE:To accurately determine the lock of a rotary brush and to protect a nozzle motor, by a method wherein when output from a current-detecting circuit is beyond a first preset value, voltage applied to the nozzle motor is lowered by regulating a phase-control angle therefor, and when the output is beyond a second preset value, it is determined that the rotary brush is locked and the operation of the nozzle motor is stopped. CONSTITUTION:When a rotary brush 10 is locked, a mean value of detected voltage is suddenly increased by the work of a peak-holding circuit. At this time, if the mean value at a first preset value or above is continuously detected for a first preset time or above, it is decided that the rotary brush 10 is being in the state of locking. When it is determined that the rotary brush 10 is being in the state of locking, a phase-control angle is made large and voltage applied to a nozzle motor 26 is lowered. After that, the mean value at a second preset value or above is continuously detected for a second preset time or above, it is determined that the rotary brush 10 is locked and the operation of the nozzle motor 26 is stopped.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner that uses a power brush suction mouth provided with a rotary brush and is operated optimally depending on the floor surface to be cleaned and the suction mouth used. .

0002

[Prior Art] Conventional vacuum cleaners are
As described in Japanese Patent Laid-open No. 9232, when the current flowing through a nozzle motor provided at the suction port exceeds a certain set value for a certain set time, the power supply to the nozzle motor is turned off. The type of surface to be cleaned was detected from changes in the current flowing through the nozzle motor installed at the suction port, and the input to the fan motor was controlled based on the results.

0003

[Problems to be Solved by the Invention] In the above-mentioned prior art, the current flowing through the nozzle motor provided at the suction port varies depending on the person operating the suction port, and the magnitude of the current varies depending on the surface of the floor to be cleaned. Depending on the values of the set value and set time, there is a possibility that the rotary brush is determined to be locked in a complicated manner, and if the set value of the current and the set time are set too large, the motor may be damaged. In other conventional technologies, for example, the current flowing through a nozzle motor provided at the suction port varies depending on the person operating the suction port, and in a method in which the floor surface is detected based on the magnitude, there is a problem that the floor surface may be incorrectly judged.

A first object of the present invention is to provide a vacuum cleaner that can accurately determine whether a rotary brush is locked and can protect a nozzle motor.

A second object of the present invention is to provide a vacuum cleaner that can automatically obtain the optimum suction force depending on the floor surface and the suction port used even when the rotary brush is locked. A third object of the present invention is to provide a vacuum cleaner that can protect the fan motor when the suction port is sealed.

A fourth object of the present invention is to provide a vacuum cleaner that can protect the fan motor even in the event of a momentary power cut.

A fifth object of the present invention is to provide a vacuum cleaner that can protect the fan motor even when the power supply voltage fluctuates.

[0008] A sixth object of the present invention is to provide a vacuum cleaner that can provide optimal suction power under the conditions in which the operator uses it.

A seventh object of the present invention is to provide a vacuum cleaner in which a defective part can be identified when the vacuum cleaner is in an abnormal state.

0010

[Means for solving the problem] The first purpose is to house a filter that collects dust, a variable speed fan motor that provides suction power to the vacuum cleaner, and a nozzle motor that drives a rotary brush in the suction port. A power brush suction port having a fixed power brush, a phase control circuit that adjusts the voltage applied to the nozzle motor, and a current detection circuit that detects the load current of the nozzle motor are provided, and the output of the current detection circuit is continuously at the first set value. When the current detection circuit exceeds the first set time by adjusting the phase control angle of the nozzle motor to lower the applied voltage, and the output of the current detection circuit exceeds the second set value continuously for more than the second set time. This is achieved by determining that the rotary brush is locked and stopping the operation of the nozzle motor.

The second purpose is to provide a filter for collecting dust, a variable speed fan motor that provides suction power to the vacuum cleaner, and a pressure inside the vacuum cleaner body case to detect clogging of the filter. It has a sensor and a circuit that detects the current of a rotary brush drive nozzle motor housed in the power brush suction port, and the static pressure Hdat from the output of the pressure sensor is
a, and calculate the air volume Qdata flowing from the suction port using the rotation speed and load current of the fan motor or the rotation speed and load current of the fan motor and the static pressure, and calculate the air volume Qdata at the suction port. Air volume command value Qcmd, static pressure command value Hcmd, and static pressure detection value H related to static pressure
A control circuit is provided that adjusts the rotational speed of the fan motor according to data and the air volume calculation value Qdata, and the variation width Δpbi of the peak value of the current of the nozzle motor, which varies depending on the suction operation during cleaning, and the The static pressure fluctuation width ΔH is detected, and a fuzzy calculation is performed using at least the air volume command value Qcmd, the static pressure command value Hcmd, and any two of the fluctuation width Δpbi and the fluctuation width ΔH as input, and the Fuzz
Integrate the y calculation result and calculate the air volume command value Q based on the result.
This is achieved by determining the static pressure command value Hcmd and the static pressure command value Hcmd, and using the fuzzy calculation result using the fluctuation range ΔH as input when the rotary brush is locked.

[0012] The third object of the invention is to determine whether the suction port is sealed from the magnitude of the load current at a constant rotational speed of the fan motor, and to control the fan motor based on the result. This is achieved by stopping the operation of the

The fourth object is to use the above configuration to detect the presence or absence of an AC power source, which is the power source of the vacuum cleaner, by a zero-cross detection circuit, and to reduce the speed command of the fan motor when the power supply is momentarily cut off without a zero-cross; This is achieved by stopping the operation of the fan motor when the time without zero crossing exceeds a certain set time.

[0014] The fifth object is to provide the above configuration with a PW of a power conversion element that supplies power to the fan motor.
This is achieved by detecting a duty of 100%, which is voltage control, from the M pulse and correcting the speed command of the fan motor based on the result.

[0015] The sixth object is that in the above configuration, when the operation switch of the vacuum cleaner is turned on, the fan motor is started and first rotated at low speed as a standby operation, and the output of the pressure sensor is changed. Detects the operation state of the suction port, and when the result is an operation state, powers up the fan motor to enable cleaning, detects static pressure Hdata from the output of the pressure sensor, and determines the rotation speed of the fan motor. The air volume Qdata flowing in from the suction port is calculated using the load current or the rotational speed of the fan motor, the load current, and the static pressure, and the air volume command value Qcmd related to the air volume and static pressure at the suction port is calculated. Static pressure command value Hcm
d, the static pressure detection value Hdata, and the air volume calculation value Qda
a control circuit that adjusts the rotational speed of the fan motor according to ta, and a fluctuation range Δpbi of the peak value of the current of the nozzle motor and a fluctuation range of the static pressure that fluctuate according to the suction operation during cleaning. ΔH, and detect at least the air volume command value Qcmd, the static pressure command value Hcmd, and the fluctuation range Δpbi.
Fuzzy by inputting any two of the fluctuation range ΔH and
By performing calculations, determining the air volume command value Qcmd and the static pressure command value Hcmd based on the Fuzzy calculation results, and powering down the fan motor to put it in a standby operation state when there is no suction operation, achieved.

The seventh object is to provide the vacuum cleaner with a self-diagnosis operation switch as an operation switch for the vacuum cleaner to check whether there is any abnormality in the entire system of the vacuum cleaner, and the self-diagnosis operation switch When ON, the vacuum cleaner operates at a constant speed, and the output of the temperature sensor provided inside the vacuum cleaner body is detected by a temperature detection circuit and temperature detection processing, and the output from the pressure sensor is detected by a static pressure detection circuit and static pressure detection processing. detect the current of the nozzle motor by performing a nozzle motor current detection circuit and a nozzle motor current detection process, and detect the current of the fan motor by performing a fan motor current detection circuit and a fan motor current detection process. , by determining the abnormal part from these detection results and displaying the determination results on a display circuit provided on the main body of the vacuum cleaner.
achieved.

[0017]

[Operation] Since the rotary brush is in direct contact with the floor,
During cleaning, a change occurs in the current of the rotary brush drive nozzle motor. Since the peak value of the current flowing through the nozzle motor varies depending on the person operating the suction port and the surface to be cleaned, when the peak value of the current exceeds the first set value continuously for more than the first set time, the rotary brush Since it seems that the nozzle motor is locked, adjusting the phase control angle of the nozzle motor and lowering the applied voltage will reduce the current flowing through the nozzle motor and prevent damage to the area around the commutator. Furthermore, the output of the current detection circuit continuously changes to the second set value.
By determining that the rotary brush is locked and stopping the operation of the nozzle motor only when the set time has exceeded , it is possible to accurately determine whether the rotary brush is locked and protect the nozzle motor without impairing usability. next,
During cleaning, if the rotary brush locks while controlling the rotation speed of the fan motor based on the fuzzy calculation result using the input fluctuation range Δpbi of the nozzle motor current that changes depending on the type of floor surface, Since the fan motor rotation speed is automatically switched to be controlled based on the fuzzy calculation result using the static pressure fluctuation range ΔH as input,
Improved usability. Next, when the suction port is sealed, the air volume becomes zero, and the cooling air volume of the fan motor also becomes zero. However, when the motor is rotated at a constant speed, the magnitude of the motor load current at this time is continuously greater than a certain set value. Since the operation of the fan motor is stopped when the temperature decreases, the fan motor can be thermally protected. Next, in the event of a momentary power interruption or voltage change that causes the motor to go into an uncontrolled state, a zero-cross detection circuit detects the presence or absence of an AC power source, a 100% duty detection circuit detects 100% duty caused by the voltage drop, and the fan Since the speed command is corrected to prevent the motor from going into an uncontrolled state, excessive current will not flow to the motor even when the power is restored or when the voltage suddenly increases, and the fan motor can be protected in terms of current. Next, depending on the operation state of the vacuum cleaner, there is a standby operation state and a cleaning operation state, so when the vacuum cleaner is not cleaning, the power is low, resulting in energy savings and noise reduction, and when the vacuum cleaner is cleaning, the power is high, which reduces the amount of suction required. It provides more power and is easier to use. Furthermore, since a self-diagnosis operation mode is provided so that the location of the failure can be identified when the vacuum cleaner stops abnormally, a vacuum cleaner that can minimize inconvenience to the user can be obtained.

[0018]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 22. In this embodiment, it is assumed that a variable speed motor is used as a fan motor as the drive source of the vacuum cleaner. Variable speed motors include AC commutator motors whose speed changes by controlling the input, phase control motors,
Possible options include inverter-driven induction motors, reluctance motors, or brushless motors.
In this embodiment, there is no brush that involves mechanical sliding;
Therefore, an example will be described in which a brushless motor with a long life and good control response is used as a fan motor.

Furthermore, the present invention basically assumes that the suction port has a nozzle motor that drives a rotary brush, and the nozzle motor may be a DC magnet motor or an AC commutator motor, but in this embodiment, An example using a DC magnet motor with a built-in rectifier circuit will be explained. Further, an example will be described in which a pressure sensor (semiconductor pressure sensor) for detecting filter clogging and a temperature sensor (thermistor or the like) for protecting the fan motor or control circuit from overtemperature are provided in the vacuum cleaner body.

FIG. 1 is a block diagram showing a schematic configuration of a control circuit, and FIG. 2 shows an overall configuration of the control circuit.

In the figure, 16 indicates an inverter control device. Reference numeral 29 denotes an AC power source, which is rectified by a rectifier circuit 21, smoothed by a capacitor 22, and supplies a DC voltage Ed to the inverter circuit 20. The inverter circuit 20 is a 120 degree conduction type inverter comprised of transistors TR1 to TR6 and free wheel diodes D1 to D6 connected in parallel to the respective transistors TR1 to TR6. Transistors TR1 to TR3 have positive arc
configure the system. The transistors TR4 to TR6 constitute a negative arm, each conducting period is 120 electrical degrees, and is subjected to pulse width modulation (PWM) in conjunction with the triangular wave generating circuit 38. R1 is a relatively low resistance connected between the emitters of transistors TR4 to TR6 forming the negative arm and the negative side of capacitor 22.

FM is a brushless motor that is a fan drive motor (hereinafter referred to as a fan motor), and has a rotor R made of two-pole permanent magnets and armature windings U, V, and W. . The load current I flowing through these windings U, V, and W
D can be detected as a voltage drop across the resistor R1. The speed control circuit of the fan motor FM includes a magnetic pole position detection circuit 18 that detects the magnetic pole position of the rotor R using a Hall element 17, a fan motor current detection circuit 23 that detects and amplifies the load current ID described above, and the transistors TR1 to Based on the base driver 15 that drives the TR 6 and the detection signal 18S obtained from the detection circuit 18, the base driver 15
It mainly consists of a microcomputer 19 that drives the. 30 is an operation switch operated by an actual user, and 36 is a self-diagnosis operation switch operated by a service person.

On the other hand, 26 is a nozzle motor that drives the rotary brush 10 provided on the suction side of the vacuum cleaner, and power is supplied by controlling the phase of an AC power source 29 with a triac (FLS) 25. 24 is triac 2
The ignition circuit 5 outputs the ignition signal 24S, 27 is a current detector for the load current IN flowing through the nozzle motor 26, and 28 is a nozzle motor current detection circuit that detects and amplifies the output signal of the current detector 27. It is.

The magnetic pole position detection circuit 18 receives the signal from the Hall element 17 and generates a magnetic pole position signal 18S of the rotor R. This magnetic pole position signal 18S is used not only for current switching (commutation) of the armature windings U, V, and W, but also as a signal for detecting rotational speed. The microcomputer 19 receives this magnetic pole position signal 18
The speed is determined by counting the number of S within a certain sampling.

The detection circuit 23 for the load current ID of the fan motor FM uses a peak hold circuit (
(not shown) into a DC component and amplifies it to obtain the load current ID of the fan motor FM.

[0026] Nozzle motor (with built-in rectifier circuit)
The detection circuit 28 for the load current IN of 26 includes the current detector 2
Since the output signal 7 is an alternating current, it is rectified and converted into a direct current component, and amplified to obtain the load current IN of the nozzle motor 26.

The microcomputer 19 includes a central processing unit (CPU) 19-1, a read-only memory (ROM) 19-2, and a random access memory (RAM) 19-3, which are connected to an address bus (not shown). and are interconnected by a control bus or the like. And ROM19-2
includes programs necessary to drive the fan motor FM, such as speed calculation processing and speed control processing (ASR).
, current control processing (ACR), nozzle motor current detection processing, fan motor current detection processing, static pressure detection processing, etc. are stored. The RAM 19-3 is the ROM 19-3.
When executing various programs stored in 2,
It is used to read and write various necessary external data.

Transistors TR1 to TR6 are each driven by a base driver 15 in response to a firing signal 19S generated and processed by a microcomputer.

The triac 25 responds to the firing signal 19D which is also processed and generated by the microcomputer 19 based on the zero cross detection circuit 32 of the AC power supply 29.
It is driven by the ignition circuit 24.

The static pressure detection circuit 31 converts the output of the pressure sensor 8 inside the vacuum cleaner body into static pressure, and also determines a conversion gain in response to a signal from the microcomputer 19.
The temperature detection circuit 34 is a temperature sensor 3 provided inside the vacuum cleaner body.
7 to fan motor 17 or inverter control device 1
6 operating temperature is detected.

The 100% duty detection circuit 33 performs pulse width modulation by comparing the firing signal 19D, which is a current switching (commutation) signal for the armature windings U, V, and W of the fan motor FM, with the triangular wave signal 38S. It is detected from the firing signal 15S that the transistors TR1 to TR6 are not chopped. 35 is a display circuit for indicating the operating state of the fan motor FM driven by the inverter control device 16.

This type of brushless fan motor FM is
Since the current flowing through the armature winding corresponds to the output torque of the motor, the output torque can be varied by changing the applied current. That is, by adjusting the applied current, the output of the motor can be changed continuously and arbitrarily. Further, by changing the drive frequency of the inverter, the rotation speed of the fan motor FM can be freely changed.

The vacuum cleaner of the present invention uses such a brushless motor.

Next, FIG. 3 shows the overall structure of the vacuum cleaner, and FIG. 4 shows the internal structure of the power brush suction port.

In FIGS. 3 and 4, 1 is the floor surface to be cleaned, 2 is the main body of the vacuum cleaner, 3 is the hose, 4 is the hand switch, 5 is the extension, and 6 is the nozzle motor that drives the rotary brush 10. 26 built-in power brush suction port, 7 a filter, 8 a pressure sensor that detects the degree of clogging of the filter 7, 37
Reference numeral 35 is a temperature sensor for detecting overtemperature of the fan motor FM or the inverter control device 16, and 35 is a display circuit composed of an LED that indicates the operating status of the vacuum cleaner. Inside the suction case 6A of the power brush suction port 6, there are a nozzle motor 26, a rotary brush 10, and a brush 11 attached thereto. 12 is a timing belt that transmits the driving force of the nozzle motor 26 to the rotary brush 10, 13 is a suction extension tube, and 14 is a roller. A power lead wire 9 of the nozzle motor 26 is connected to a power wire 5A provided in the extension tube 5.

From this, when the nozzle motor 26 is supplied with power and rotates, the rotary brush 10 rotates via the timing belt 12. When the power brush suction port 6 is brought into contact with the floor surface 1 while the rotary brush 10 is rotating,
Since the rotary brush 10 is equipped with a brush 11, the brush 11 is in contact with the floor surface 1, and the load current I of the nozzle motor 26 is
N becomes larger. By the way, as a result of various experiments, since the nozzle motor 26 rotates in one direction, the rotary brush 10 also rotates in one direction, and when the power brush suction port 6 is operated back and forth, the power brush suction port 6 advances when the rotary brush 10 is rotated. It has been found that when the power brush suction port 6 is operated in the direction shown in FIG. Ta.

Next, a description will be given of changes in the load current of the nozzle motor in response to the suction port operation. First, FIG. 5 shows a zero-cross detection circuit for phase control of the nozzle motor, and FIG. 6 shows the voltage and current waveforms applied to the nozzle motor.

In FIGS. 5 and 6, the AC power supply 29 is
When the voltage VS is in (a), a zero-crossing signal 32S shown in FIG. 6(b) is obtained by the zero-crossing detection circuit 32 consisting of a resistor R2, a photocoupler PS, and a resistor R3. The microcomputer 19 receives this zero cross signal 32S.
The count timer shown in FIG. 6(c) is synchronized with the rising edge of , and when the count timer reaches zero, the firing signal 19 from the microcomputer 19 to the FLS 25
(Although not shown, the zero-crossing signal 32S may be inverted so that the count timer is operated in synchronization with the fall of the zero-crossing signal). As a result, a load current IN shown in FIG. 6A flows through the nozzle motor 26, and the rotational speed of the nozzle motor 26, so-called input, is controlled by phase control.

FIG. 7 shows the current detection circuit configuration and output example of the nozzle motor. Since the load current IN supplied to the nozzle motor 26 has an intermittent alternating current waveform as shown in FIG. Enter. Then, the current detection circuit 28 converts the load current IN into a DC voltage signal VDP corresponding to the peak current of the load current IN shown in FIG. The reason for detecting the peak current is that it is the peak current that has an adverse effect on the nozzle motor 26, and it is this peak current that changes significantly with respect to the suction operation). When the mouthpiece is operated, this output signal VDP is a voltage VDP corresponding to the mouthpiece operation, as shown in FIG. 7(c).
Varies between MX and VMN. The difference between these two voltages (VMX
-VMN) is the fluctuation range of the detection voltage VMB, and the average value of the detection voltage is the average value of both voltages (VMX-VMN)/2.
AV.

FIG. 8 shows the average value VAV of the detected voltage with respect to changes in the phase control angle during rotary brush locking. When the rotary brush is locked, if the phase control angle is large, the voltage applied to the nozzle motor is small, so the average value of the detected voltage VAV is also small. However, as the phase control angle becomes smaller, the voltage applied to the nozzle motor increases. The average value VAV of the detection voltage also increases. Therefore, locking of the rotary brush can be detected from the magnitude of the average value VAV of the detected voltage, but the average value VAV of the detected voltage changes depending on the mouthpiece operation.

FIG. 9 shows the change in the average value VAV of the detected voltage when the rotary brush is locked during suction operation. When the vacuum cleaner is driven and the suction mouth is operated, the average value VAV of the detected voltage fluctuates as shown in the figure (nozzle motor phase control angle θ1), but when the rotary brush locks, the average value VAV of the detected voltage peaks. It increases rapidly due to the action of the hold circuit. At this time, if the average value VAV that is greater than or equal to the first set value V01 continues to exceed the first set time T1, it is determined that the rotary brush is in a locked state. When the rotary brush is in a locked state, the load current of the nozzle motor becomes extremely large, so if the nozzle motor is stopped, damage to the area around the nozzle motor commutator can be prevented. There may be cases where the numbers are different, which may actually be inconvenient in terms of usability.

Therefore, when it is determined that the rotary brush is in the locked state, the phase control angle is increased to θ2, the voltage applied to the nozzle motor is lowered, and at this time the second set value V0 is
The average value VAV of 2 or more continues for a second set time T2
If this elapses, it is determined that the rotary brush is locked, and the operation of the nozzle motor is stopped. As a result, when the operator leaves the suction spout on the floor and the average value VAV of the detected voltage exceeds the first set value V01, or when it is determined that the rotary brush is in the locked state, the operator operates the suction mouth again. Then, since the rotary brush rotates, the lock determination of the rotary brush is released. Here, when it is determined that the rotary brush is in a locked state, the voltage applied to the nozzle motor is lowered, so the load current flowing to the nozzle motor is small, and damage to the area around the commutator can be prevented. Note that FIG. 10 shows a flowchart for determining whether the rotary brush is locked. The process indicated by the dotted line in the figure is
As shown in FIG. 8, since the average value VAV of the detected voltage changes depending on the phase control angle θ, the first setting value VAV′ shown by the dashed line is set to increase the accuracy of lock determination of the rotary brush. Then, this VAV' is calculated by calculation.

Next, a method for determining the floor surface to be cleaned will be explained. First, FIG. 11 shows the low speed rotation of the nozzle motor.
This figure shows the results of measuring the fluctuation width VMB of the detected voltage corresponding to the change in the load current of the nozzle motor during suction operation, depending on the floor surface. Here, the rotational speed of the fan motor increases in the order of rotational speed (2) to rotational speed (2), or in other words, the suction force increases in order. Also, carpet ■ to carpet ■ represent the length of the hair, increasing in order. In FIG. 11, we will consider whether the type of floor surface to be cleaned can be estimated from the fluctuation range VMB of the detected voltage. When the suction force at rotational speed ■ is weak, the fluctuation range VMB is zero when the rushes are lined up, but when the suction is operated in the direction of the rows of rushes, it is (If you operate the suction spout), the size increases in the order of the carpet, but the case with the reverse side of the fold is larger than the carpet ■. The same holds true for the rotation speeds ■ and ■, and the type of floor surface cannot be determined simply based on the magnitude of the variation width VMB. However, it turns out that it is possible to judge Yuka and others.

FIG. 12 shows the results of measuring the fluctuation range VMB of the detected voltage corresponding to the change in the load current of the nozzle motor during suction operation during high-speed rotation of the nozzle motor, depending on the floor surface. In FIG. 12, when the nozzle motor is rotating at high speed, the fluctuation range VMB of the detected voltage increases in the order of Yuka, Tatami, and Carpet ■ to ■, almost regardless of the rotation speed ■ from fan motor rotation speed ■. Here, the type of floor surface can be determined. In other words, by adjusting the rotational speed of the nozzle motor and fan motor according to the judgment result of the floor surface,
The floor surface to be cleaned can be determined using the variation width VMB of the detected voltage.

Up to now, we have described the floor surface determination using the fluctuation range VMB of the detected voltage, which is the peak value of the nozzle motor current. The determination method will be explained.

FIG. 13 shows the results of measuring the variation width HMB of static pressure with respect to the rotational speed of the fan motor depending on the floor surface. In FIG. 13, it can be seen that depending on the rotational speed of the fan motor, it is possible to determine whether a yukata or a tatami is used, but it is not possible to distinguish between a tatami or a rug.

[0047] In addition, the fluctuation range VMB of the detected voltage and the fluctuation range HMB of static pressure vary depending on the operating force of the user, the condition of the floor surface to be cleaned, and the type of brush of the rotary brush, so simply determining the floor surface may result in incorrect judgment. may occur. Therefore, we use FUZZY inference that can take ambiguity into account to cover errors in determining the floor surface to be cleaned.

First, FIG. 14 shows the operating modes of the fan motor. Here, the suction force P0 of the vacuum cleaner is proportional to the product of the air volume Q and the static pressure H. In FIG. 14, the air volume Q constant control always ensures the minimum required air volume at the suction port, and as the filter becomes clogged, the static pressure increases by the pressure loss. Constant static pressure H control reduces the adhesion between the floor surface and the mouthpiece, and has the advantage that, for example, even if a foreign object sticks to the mouthpiece, the static pressure will only rise to a certain extent, making it easier to remove the foreign object. The reason why the static pressure increases as the air volume decreases is because the static pressure at the rear of the filter is controlled to be constant, so the static pressure increases on the suction side by the pressure loss in the filter section. Note that when the air volume becomes small, there is almost no suction force, so the rotation speed N is controlled to be constant to save unnecessary power. This range of constant air volume Q and constant static pressure H is controlled by FUZZY control.

On the other hand, if the power of the fan motor is increased when cleaning is not being performed, not only will the operation be noisy, but the power will be wasted. Therefore, a standby operation mode was provided, in which the power is increased and the control is switched to FUZZY control only when the suction mouth is being operated for cleaning, and when the suction port is not being operated, the power is reduced and the mode returns to the standby operation state. In the standby operation mode, in order to increase the accuracy of determining whether or not the cleaning state is in progress, the constant rotational speed N control is changed to constant airflow control when a certain airflow rate is reached, and the constant rotational speed control is changed to constant rotational speed control when a certain static pressure is reached.

Next, FUZZY control will be described. FIG. 15 shows a general FUZZY inference method. In other words, FUZZY inference consists of an antecedent part and a consequent part of the "if-then rule", and in rule 1, the fitness of the antecedent part input x1 to membership A11 and the input x
The area of membership B1 of the output of the consequent part is determined from the smaller fitness of membership A12 of 2. Similarly in rule 2, output membership B
Find the area of 2. Then, the areas corresponding to the number of rules are superimposed to find the center of gravity.

FIG. 23 shows a rule table studied for a vacuum cleaner. VS to VL were used as the membership functions of the antecedent part, and the nozzle motor current fluctuation range Δpbi (or static pressure fluctuation range ΔH) and air volume Q (or static pressure H) were used as inputs for the FUZZY inference (Table For easy understanding, the membership function and fluctuation width Δp are given as examples.
bi, the membership function and the fluctuation range ΔH are shown in correspondence). As a membership function of the consequent part, NB~
Using PB, ZO is where control settles. FIG. 16 shows the relationship between inputs and membership functions studied for a vacuum cleaner. Standardized input fluctuation range Δpbi (ΔH) and air volume Q
(Static pressure H) and output Δy were prescaled to 15 steps, and each degree of adaptation was set to 8 steps. Figure 17 shows the air volume command Qcmd and static pressure command Hc by FUZZY calculation.
This shows a method of calculating md. F shown in Figure 23
According to the UZZY inference rule, the fluctuation range Δpbi (or fluctuation range ΔH) and air volume command Qcmd (or static pressure command H
cmd), perform FUZZY calculation and center of gravity calculation to find the output change Δy, integrate it, and calculate F
This is used as the output of the UZZY calculation, and is finally post-scaled to obtain the air volume command Qcmd (or static pressure command Hcmd). The reason why the output change Δy is integrated and used as the output of the FUZZY calculation is to ensure stability of the output. FIG. 18 shows the air volume command Qc with respect to the current fluctuation range Δpbi.
This shows an example of md output. From this, the output air volume command Qcmd (or static pressure command Hcm
It can be seen that d) changes stepwise. The reason why the output is stair-shaped is because the floor to be cleaned is difficult to clean, seems to be tatami,
This is to stabilize the output when it is like a carpet. In other words, the FUZZY calculation is used, and the air volume command Qcmd is
(or the static pressure command Hcmd) in a step-like manner allows the suction force to be controlled to the optimum level depending on the floor surface to be cleaned, regardless of the operator.

Next, in the constant air volume control, the method of calculating the air volume becomes a problem. FIG. 19 shows the air volume calculation formula and the results of constant air volume control. From the general fluid theory of the fan motor and the motor characteristic equation, the following two equations can be obtained as air volume calculation equations.

[0053]

[Equation 1] Qdata=I/N
…
(Number 1)

[0054]

[Math 2] Qdata=I×N/H
(Math. 2) Here, Qdata is the air volume calculation value, I is the torque current of the fan motor, N is the rotation speed of the fan motor, and H is the static pressure. Figure 19 (a) shows I of formula (1) as the air volume calculation formula.
The results of constant air volume control using the /N method and the I×N/H method of formula (2) are shown in Figure 19 (b) as the air volume calculation formula (
(I/N+I×N/
The results of constant air volume control using the H)/2 method are shown. The constant air volume control method is to adjust the rotational speed of the fan motor so that the air volume calculation value falls between the upper limit and lower limit of the air volume command value. From this, the air volume at the suction port can be controlled to be constant according to the air volume command, but method (b) has the best accuracy. Although not shown, the constant static pressure control method similarly adjusts the rotational speed of the fan motor so that the detected static pressure value falls between the upper and lower limits of the static pressure command value.

Power-up and power-down corresponding to the suction port operation described in FIG. 14 are determined by detecting changes in static pressure. FIG. 20 shows changes in static pressure during standby operation and during FUZZY control. Figure 20 (a) shows the change in static pressure when the mouthpiece is operated back and forth on the floor during standby operation with a high output gain of the pressure sensor (sensitivity increased), and the change in static pressure when the mouthpiece is moved back and forth from the lifted position to the floor. This figure shows the change in static pressure in the following cases. Whether or not it is in the cleaning state is determined by detecting the portion surrounded by the chain line, that is, a minute change in static pressure in the positive direction. If it is determined that the cleaning state is in progress, the power is increased and the control state is shifted to FUZZY control. Figure 20 (b) shows the output gain of the pressure sensor being reduced (
(Sensitivity down) During FUZZY control operation, we show the change in static pressure when the suction mouth is left on the floor to be cleaned during cleaning, and the change in static pressure when the suction mouth is lifted from the floor surface. It is something. Whether or not it is in the cleaning state is determined by detecting the area surrounded by the chain line, that is, a negative change in static pressure. If it is determined that the cleaning state is not present, the power is powered down and the control state is shifted to standby operation. Although an example has been described in which a negative change in static pressure is detected to determine that the cleaning state is not present, it is also possible to detect no change in static pressure and use it for the determination.

Next, the determination of the mouthpiece to be used will be described. The difference between a power brush suction port and other suction ports that are not a power brush suction port is to apply an instantaneous voltage to the nozzle motor based on a zero-cross signal, and if a current is detected, it is a power brush suction port.
If it cannot be detected, it is determined that it is another suction port, and if it is determined that it is a power brush suction mouth, the fluctuation width Δpbi of the nozzle motor current is used as the input for the FUZZY calculation, and if it is determined that it is another suction port that is not the power brush suction mouth, it is used as the input for the FUZZY calculation. The static pressure fluctuation width ΔH is used.

[0057] Next, the determination process at the time of momentary power interruption will be described. When a momentary power interruption occurs, the fan motor control system increases the current command to achieve the rotational speed specified by the speed command, and finally the duty becomes 100%, resulting in a voltage control state (non-control state). At this time, if the power supply voltage is restored, the control system for the fan motor is in a voltage control state, so there is a risk that an excessive current will flow through the fan motor and the magnet will be demagnetized. Therefore, if a zero-cross signal cannot be detected during a half-cycle time of the power frequency, it is determined that there is a momentary power interruption, and the rotation speed command of the fan motor is set to the minimum, for example, and the rotation speed is always controlled. If it cannot detect this, it is determined that there is a momentary power outage, the vacuum cleaner stops operating, and the stop condition is displayed on the display circuit.

Next, the process of determining whether the duty is 100% will be described. If the duty reaches 100%, the above-mentioned problems will occur. The conditions for reaching 100% duty are:
There is a momentary power outage and a drop in power supply voltage as mentioned above. When the power supply voltage drops, the fan motor control system increases the current command in order to maintain the rotation speed specified by the speed command, and finally reaches 100% duty in the voltage control state. At this time, when the power supply voltage returns, the power supply This will cause the same problem as a momentary power outage. Figure 2
1 shows a detection circuit with a duty of 100%. The 100% duty detection circuit 33 includes a (proportional + integral) circuit that inputs the current command and motor current detection value, and a triangular wave generation circuit 38.
A chopper signal generation circuit 33A consisting of a comparator that inputs the output of , a triangular wave generation circuit 38 (proportional + integral)
It consists of a 100% duty signal generation circuit 33B that generates a 100% duty signal via a circuit. FIG. 22 shows an example of a 100% duty signal. That is, for example, when the DC voltage of the power supply voltage gradually decreases, a 100% duty signal gradually appears, and finally the duty reaches 100%. Therefore, duty 10
When the 0% signal is established, it is determined that the duty is 100%, and the speed command of the fan motor is corrected in the direction of lowering so that the 100% duty signal disappears. As a result, the rotational speed is always controlled, and the above-mentioned problems can be solved. In addition, if the fan motor is rotating at high speed even when the duty is 100%, the back electromotive force will be large and excessive current will not flow in response to fluctuations in the power supply voltage. %
Just do the driving process. Next, filter clogging determination processing will be described. Filter clogging can be determined based on the magnitude of static pressure, but since the static pressure changes even when the suction port is placed on the floor surface to be cleaned, there is a possibility of incorrect determination. Therefore, we decided to judge filter clogging based on the magnitude of H/N2 based on the general fluid theory of fan motors. When the filter is clogged, the amount of air flowing in from the suction port will decrease, which will reduce the cooling performance of the fan motor and cause abnormal heat generation of the motor. Therefore, change the operating state from the FUZZY control state as shown in Figure 14. The control state is shifted to a standby operating state and the power supplied to the motor is reduced to suppress abnormal heat generation of the motor.

Next, the process for determining whether or not the mouthpiece is sealed will be described. When the suction port is sealed, the air volume becomes even smaller due to the above-mentioned filter clogging, and when the suction port is completely sealed, the air volume becomes zero. At this time, there is a risk that the motor will rapidly generate abnormal heat, which may lead to smoke, so it is necessary to accurately determine whether the suction port is sealed. As a method for determining whether the suction port is sealed, as shown in FIG. 14, when the filter is clogged or in the vicinity of the suction port sealing, the rotational speed is constant, so the amount of airflow affects the load state. Therefore, as the load condition becomes lighter, that is, the air volume becomes smaller, the load current of the fan motor becomes smaller.
When the load current becomes smaller than a certain set value for a certain set time or more, it is determined that the suction port is sealed, the operation of the vacuum cleaner is stopped, and the status is displayed on a display circuit provided on the main body side. In the case of a vacuum cleaner, if the user pulls out the outlet plug and restarts the operation from the beginning, the same determination as described above will be repeated, and there is a possibility that abnormal heat generation of the motor cannot be prevented. Therefore, this can be countered by varying the set time depending on the magnitude of the motor load current, that is, by decreasing the set time as the load current becomes smaller.

Furthermore, the self-diagnostic driving process will be explained. Since a vacuum cleaner is a household necessity, if the protection function of the control circuit is activated and the vacuum cleaner stops operating, it is necessary to quickly restart the vacuum cleaner. Since the control circuit system shown in this embodiment has a complicated configuration, it is necessary for a service person to accurately identify the location of the failure. Self-diagnostic driving is responsible for this function. In this embodiment, a self-diagnosis operation switch is provided (this switch may be provided in the hand circuit or the internal control circuit, or it may be provided in both circuits), and when this switch is pressed, it is detected and the self-diagnosis operation is started. . Self-diagnosis operation includes a constant rotation speed mode and a synchronous start operation mode. In constant rotation operation mode, each sensor,
In other words, diagnosis of whether there is an abnormality in the pressure sensor, nozzle motor current detector, fan motor current detection circuit,
In addition, a diagnosis (not shown) is performed to see if the magnetic pole position detection circuit is functioning properly. For example, it can be determined whether the fan motor is demagnetized based on the magnitude of the output of the fan motor's current detection circuit. The synchronous start operation mode diagnoses each sensor when the constant rotation operation mode does not function. If the operation can be performed with synchronous start, the main circuit of the control circuit is normal, and the abnormal part is the control circuit around the microcomputer. This means that it can be specified. If it is not possible to operate in both operation modes, it can be determined that a detailed study of the faulty circuit is required. Since this self-diagnosis operation mode uses both operation modes in combination, the location of the failure can be accurately identified.

Next, the specific control and processing contents of the microcomputer 19 will be explained mainly with reference to FIG.

Step 1: When the operation switch 30 is turned on, operation command import processing and start-up processing (process 7) are performed to raise the rotational speed of fan motor FM to the minimum rotational speed.

Step 2: Receiving the signal 18S from the magnetic pole position detection circuit 18, calculate the rotational speed N (processing 1). Upon receiving the signal 31S from the static pressure detection circuit 31, static pressure detection processing (
Process 13) is performed to detect the static pressure H. Then, the rotational speed N, static pressure H, and current command I*(
(corresponding to the load current, and the current detected value of the fan motor may also be used) is used to calculate the air volume Q (Qdata).

Step 3: After the start-up process, by shifting to the standby mode, the device operates under constant rotational speed control or constant air volume control depending on whether the filter is clogged. Since it is in the standby operation mode, the gain of the pressure sensor is increased (process 15).

Step 4: Apply instantaneous voltage to the nozzle motor 26 in response to the signal from the zero-cross detection circuit 32, and perform nozzle motor current detection processing (processing 2) in response to the signal 24S from the nozzle motor current detection circuit 24. In the suction port determination (process 14), if the nozzle motor current is detected, it is determined that it is a power brush suction port, and if it is not detected, it is determined that it is another suction port other than the power brush suction port.

Step 5: If the suction port determination result is a power brush suction port, then the standby operation mode is in effect, and the rotational speed of the rotary brush 10 will be 300 to 500 revolutions based on the signal from the zero-cross detection circuit 32. Set the nozzle motor phase control angle as follows. The reason why the rotational speed of the rotary brush 10 is set to 300 to 500 rotations is to avoid wasting power during standby operation, and to alert the user and those around them that the rotary brush 10 is rotating. .

Step 6: A filter clogging detection process (process 5) is performed based on the relationship between the static pressure H and the rotational speed to detect the degree of filter clogging and display it on the display circuit on the main body side.

Step 7: In the static pressure detection process (process 13), if a positive change ΔH in static pressure is detected, it is determined that the cleaning state is in progress (process 6), and the process shifts to FUZZY control; if no detection is detected, the process continues as is. Continue standby operation. When shifting to FUZZY control, the gain of the pressure sensor is lowered (process 15).

Step 8: When shifting to FUZZY control, the fluctuation width Δpbi of the peak value of the nozzle motor current and the fluctuation width ΔH of the static pressure at the time of suction operation are determined by the fluctuation width detection process (process 4).
) is detected.

Step 9: In the suction mouth determination (process 14), the FUZZY calculation is selected in which the fluctuation width Δpbi is input for a power brush suction mouth, and the fluctuation width ΔH is input for a suction mouth other than the power brush suction mouth.

Step 10: The FUZZY calculation unit 19A consists of an FUZZY calculation unit that creates the air volume command Qcmd, and an FUZZY calculation unit that creates the static pressure command Hcmd. In the case of a power brush suction port, there is a FUZZY calculation section that inputs the fluctuation width Δpbi and the air volume command Qcmd, and an FUZZY calculation section that inputs the fluctuation width Δpbi and the static pressure command Hcmd.
Select the ZY calculation section, and in the case of other suction ports other than the power brush suction port, input the fluctuation width ΔH and air volume command Qcmd to the FUZZY calculation section, and the fluctuation width ΔH and static pressure command H.
Select the FUZZY calculation section with cmd as input, and select F
A new air volume command Qcmd and static pressure command Hcmd are created from the UZZY calculation results.

Step 11... FUZZY calculation section with air volume command Qcmd as input or F with static pressure command Hcmd as input
The UZZY calculation section is selected depending on whether it is a constant air volume control area or a constant static pressure control area.

Step 12: Selection of constant air volume control (constant Q), constant static pressure control (constant H), and constant rotational speed control (constant N) is based on the air volume command Qcmd (or air volume calculation value Qdata) or static pressure H The operation mode setting process (process 16) is performed depending on the size of the process.

Step 13: The nozzle motor 26 is
The phase control angle is determined by phase control angle setting processing (processing 8) using the ZY calculation result and the output of the zero cross detection circuit 32 as input, and is driven via call signal processing (processing 9).

Step 14: In constant air volume Q control or constant static pressure H control, static pressure command Hcmd and static pressure detected value Hd
ata or air volume command Qcmd and air volume calculation value Qdat
The speed command N* is output by matching with the speed command a.

Step 15: Then, upon receiving the signal 23S from the fan motor current detection circuit 23, a fan motor current detection process (process 3) is performed to detect the load current ID. This load current ID, rotational speed N (processing 1) and speed command N
*In response to this, speed control processing (ASR) and current control processing (
A current command I* is output from processing 11 of ACR). In response to this current command I*, a base driver signal 19S is output in a roll call signal generation process (process 10). Fan motor FM can be controlled to a desired rotational speed by receiving base driver signal 19S.

From this, the rotational speeds of the fan motor FM and the nozzle motor 26 can be adjusted according to the fluctuation width Δpbi (VMB) of the peak value of the nozzle motor current and the fluctuation width ΔH (HMB) of the static pressure during suction operation. Since it can be adjusted, the optimal suction power can be obtained depending on the floor surface to be cleaned.

[0078] Abnormal processing in each process shown in Fig. 1 is as follows.
Power brush (pb) lock determination processing (process 14), power interruption determination processing (process 20), and duty 100%
There is a determination process (process 17) (when viewed as a vacuum cleaner, and if the motor control system is also included, there is an overtemperature process, an overspeed process, and an overcurrent process (not shown)). Here, the pb lock determination process selects the static pressure fluctuation range ΔH as the fluctuation range even for a power brush suction port, and the power interruption determination process separates the operation command from the output of the FUZZY calculation unit 19A, and The 100% duty determination process similarly separates the driving command from the output of the FUZZY calculation unit 19A and selects the driving command that is the output of the 100% duty driving process.

[0079]

[Effects of the Invention] According to the present invention, the FUZZY automatically detects the used suction port and inputs the nozzle motor current fluctuation width Δpbi and static pressure fluctuation width ΔH according to the degree of filter clogging and the floor surface. The rotation speed of the fan motor and nozzle motor is automatically controlled based on the calculation results, and the rotation speed of the fan motor and nozzle motor is automatically controlled when the power brush is locked, when the power is momentarily cut off, and when the duty is 100%.
It has a protective operation function and a self-diagnosis operation function, and also determines the operating status by determining whether or not it is in the cleaning status.
It is possible to provide a vacuum cleaner with improved usability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a control circuit for a vacuum cleaner according to the present invention.

FIG. 2 is an overall configuration diagram of the control circuit.

FIG. 3 is an overall configuration diagram of the vacuum cleaner.

FIG. 4 is a diagram of the internal structure of the power brush mouthpiece.

FIG. 5 is a diagram of a zero-cross detection circuit for AC power supply voltage.

FIG. 6 is a diagram showing voltage applied to the nozzle motor, current waveform, zero cross signal, count timer, and FLS trigger signal.

FIG. 7 is a diagram showing a nozzle motor current detection circuit configuration and an example of its output.

FIG. 8 is a diagram showing the average value of detected voltage with respect to the phase control angle during rotary brush lock.

FIG. 9 is a diagram showing changes in the average value of detected voltage when the rotary brush is locked during cleaning.

FIG. 10 is a diagram showing a flowchart of rotary brush lock determination.

FIG. 11 is a diagram showing the fluctuation range of the peak value of the nozzle motor current with respect to the floor surface when the nozzle motor rotates at low speed.

FIG. 12 is a diagram showing the fluctuation range of the peak value of the nozzle motor current with respect to the floor surface when the nozzle motor rotates at high speed.

FIG. 13 is a diagram showing the variation range of static pressure with respect to the floor surface.

FIG. 14 is a diagram showing operation modes of the fan motor.

FIG. 15 is a diagram showing a general FUZZY inference method.

FIG. 16 is a diagram showing a membership function applied to the vacuum cleaner of the present invention.

FIG. 17 is a diagram showing the FUZZY calculation method applied to the vacuum cleaner of the present invention.

FIG. 18 is a diagram showing an example of the output of the air volume command Qcmd based on the FUZZY calculation with respect to the current fluctuation width Δpbi.

FIG. 19 is a diagram showing an air volume calculation formula and a constant air volume control result.

FIG. 20 is a diagram showing changes in static pressure during standby operation and during FUZZY control.

FIG. 21 is a detection circuit diagram with a duty of 100%.

FIG. 22 is a diagram showing an example of a 100% duty signal.

FIG. 23 is a diagram showing the FUZZY rule applied to the vacuum cleaner of the present invention.

[Explanation of symbols]

8... Pressure sensor, 16... Inverter, 19... Microcomputer, 23... Fan motor current detection circuit, 25...
Triac, 26... Nozzle motor, 28... Nozzle motor current detection circuit, 30... Operation switch, 31... Static pressure detection circuit, 32... Zero cross detection circuit, 33... Duty 1
00% detection circuit, 34...Temperature detection circuit, 35...Display circuit, 36...Self-diagnosis operation switch.

Claims (20)

[Claims] Claim 1: A filter that collects dust, a fan motor that provides suction power to the vacuum cleaner, a power brush suction port that houses a nozzle motor that drives a rotary brush, and adjusts the voltage applied to the nozzle motor. In the method for operating a vacuum cleaner having a phase control circuit, a current detection circuit for detecting the load current of the nozzle motor is provided, and when the output of the current detection circuit exceeds a first set value, the phase of the nozzle motor is adjusted. The control angle is adjusted to lower the applied voltage, and when the output of the current detection circuit exceeds a second set value, it is determined that the rotary brush is locked, and the operation of the nozzle motor is stopped. How to operate a vacuum cleaner. 2. According to claim 1, the phase control angle of the nozzle motor is adjusted when the output of the current detection circuit continuously exceeds a first set value for a first set time or more. A vacuum cleaner characterized in that the rotary brush is determined to be locked when the applied voltage is lowered and the output of the current detection circuit continuously exceeds a second set value for a second set time or more. how to drive. 3. According to claim 1, the first setting value for the output of the current detection circuit is adjusted according to the magnitude of the phase control angle of the nozzle motor. How to operate a vacuum cleaner. 4. The electric vacuum cleaner according to claim 1, wherein when the operation of the nozzle motor is stopped, a message indicating that the operation of the nozzle motor has been stopped is displayed on the main body of the vacuum cleaner. How to operate a vacuum cleaner. 5. In claim 1, the nozzle motor is a DC magnet motor with a built-in rectifier circuit, and the current detection circuit performs full-wave rectification of the AC power supply current of the nozzle motor, and a resistor. A method for operating a vacuum cleaner characterized by comprising a peak hold circuit consisting of a capacitor. 6. A filter that collects dust, a variable speed fan motor that provides suction power to the vacuum cleaner, a pressure sensor that detects clogging of the filter in the vacuum cleaner body case, and a power brush suction port. A vacuum cleaner having a current detection circuit that detects the current of a rotary brush drive nozzle motor housed in the vacuum cleaner, which detects the static pressure Hdata from the output of the pressure sensor, and detects the rotational speed of the fan motor and the load current or The amount of air flowing in from the suction port Qda using the rotation speed of the fan motor, the load current, and the static pressure.
ta is calculated, and the fan motor is rotated according to the air volume command value Qcmd and static pressure command value Hcmd related to the air volume and static pressure at the suction port, the static pressure detection value Hdata, and the air volume calculation value Qdata. It has a control circuit that adjusts the speed, and has a fluctuation width Δpbi of the peak value of the current of the nozzle motor and a fluctuation width Δ of the static pressure, which fluctuate according to the operation of the suction port during cleaning.
H, and performs a fuzzy calculation using at least the air volume command value Qcmd, the static pressure command value Hcmd, and any two of the fluctuation range Δpbi and the fluctuation range ΔH as input, and then calculates the air volume command based on the result of the fuzzy calculation. determining the value Qcmd and the static pressure command value Hcmd, and detecting locking of the rotary brush from the current value of the nozzle motor;
A vacuum cleaner characterized in that, when locking the rotary brush, a fuzzy calculation result using the fluctuation range ΔH as an input is used. 7. Claim 6, wherein the air volume command value Qcmd and the static pressure command value Hcmd are determined from the result of a Fuzzy calculation using the static pressure fluctuation width ΔH as input, and the A vacuum cleaner characterized in that a gain is adjusted based on a determination result of locking of the rotary brush. 8. In claim 6, the Fu
A vacuum cleaner characterized in that the input of the zzy calculation is the air volume calculation value Qdata. 9. In claim 6, the Fu
A vacuum cleaner characterized in that an input for the zzy calculation is the static pressure detection value Hdata. 10. A filter that collects dust, a variable speed fan motor that provides suction power to the vacuum cleaner, a pressure sensor that detects clogging of the filter in the vacuum cleaner body case, and a power brush suction port. In a vacuum cleaner having a circuit for detecting the current of a rotary brush drive nozzle motor housed in the fan motor, the fact that the suction port is sealed is determined based on the magnitude of the load current at a constant rotational speed of the fan motor; A vacuum cleaner characterized in that the operation of the fan motor is stopped based on the result. 11. The vacuum cleaner according to claim 10, wherein operation of the fan motor is stopped when the time during which the suction port is sealed exceeds a predetermined time. 12. The vacuum cleaner according to claim 11, wherein the set time for the time during which the suction port is sealed is changed in accordance with the magnitude of the load current of the fan motor. [Claim 13] A filter for collecting dust, a variable speed fan motor that provides suction power to the vacuum cleaner, a pressure sensor for detecting clogging of the filter in the vacuum cleaner body case, and a power brush suction port. In a vacuum cleaner that has a circuit for detecting the current of a rotary brush drive nozzle motor housed in the vacuum cleaner, a zero-cross detection circuit detects the presence or absence of an AC power source that is the power source of the vacuum cleaner, and in the event of a momentary power interruption without a zero-cross, A vacuum cleaner characterized in that the speed command of the fan motor is lowered and the operation of the fan motor is stopped when the time without zero crossing exceeds a certain set time. Claim 14: A filter that collects dust, a variable speed fan motor that provides suction power to the vacuum cleaner, a pressure sensor that detects clogging of the filter in the vacuum cleaner body case, and a power brush suction port. In a vacuum cleaner having a circuit for detecting the current of a rotary brush drive nozzle motor housed in a fan motor, a duty of 100%, which is voltage control, is detected from a PWM pulse of a power conversion element that supplies power to the fan motor. A vacuum cleaner characterized in that the speed command of the fan motor is corrected based on the result. 15. The vacuum cleaner according to claim 14, further comprising an area where the duty is detected to correct the speed command of the fan motor and an area where the speed command of the fan motor is not corrected. 16. A filter that collects dust, a variable speed fan motor that provides suction power to the vacuum cleaner, a pressure sensor that detects clogging of the filter in the vacuum cleaner body case, and a power brush suction port. In a vacuum cleaner having a circuit for detecting the current of a rotary brush drive nozzle motor housed in a vacuum cleaner, when the operation switch of the vacuum cleaner is turned on, the fan motor is started up and first rotated at low speed as a standby operation. detects the operation state of the suction port from a change in the output of the pressure sensor, and when the operation state is the result, the fan motor is powered up to enable cleaning, and the static pressure Hdata from the output of the pressure sensor is detected. Detect and calculate the air volume Qdata flowing in from the suction port using the rotation speed and load current of the fan motor or the rotation speed and load current of the fan motor and the static pressure, and calculate the air volume and static pressure at the suction port. The fan motor has a control circuit that adjusts the rotational speed of the fan motor according to an air volume command value Qcmd, a static pressure command value Hcmd, the static pressure detection value Hdata, and the air volume calculation value Qdata, which are related to A variation width Δpbi of the peak value of the current of the nozzle motor and a variation width ΔH of the static pressure, which vary according to the suction operation, are detected, and at least the air volume command value Qcmd, the static pressure command value Hcmd, and the variation width Δpbi are detected. A vacuum cleaner characterized in that a fuzzy calculation is performed using any two of the fluctuation widths ΔH as input, and the air volume command value Qcmd and the static pressure command value Hcmd are determined based on the results of the fuzzy calculation. 17. The electric cleaning device according to claim 16, wherein the speed command of the fan motor is set to the standby operation state when it is determined that the operation state of the suction port is not in the operation state. Machine. 18. The vacuum cleaner according to claim 16, wherein the gain of the pressure sensor in the standby operating state is larger than that in the operating state using the fuzzy calculation result. 19. A filter that collects dust, a variable speed fan motor that provides suction power to the vacuum cleaner, a pressure sensor that detects clogging of the filter in the vacuum cleaner body case, and a power brush suction port. In a vacuum cleaner having a circuit for detecting the current of a rotary brush drive nozzle motor housed in the vacuum cleaner, a self-diagnosis operation is performed as an operation switch of the vacuum cleaner to check whether there is any abnormality in the entire system of the vacuum cleaner. A switch is provided, and when this self-diagnosis operation switch is ON, the vacuum cleaner operates at a constant speed, detects the output of the temperature sensor installed in the vacuum cleaner body by performing temperature detection circuit and temperature detection processing, and detects the output from the pressure sensor at a constant speed. A pressure detection circuit and a static pressure detection process are performed to detect the current of the nozzle motor, a nozzle motor current detection circuit and a nozzle motor current detection process are performed to detect the current of the fan motor, and a fan motor current detection circuit and a fan motor current detection process are performed to detect the current of the fan motor. A vacuum cleaner characterized in that a motor current is detected by performing a motor current detection process, an abnormal part is determined from these detection results, and the determination result is displayed on a display circuit provided on the vacuum cleaner main body. 20. A filter for collecting dust, a variable speed brushless fan motor that provides suction power to the vacuum cleaner, a pressure sensor for detecting clogging of the filter in the vacuum cleaner body case, and a power brush. In a vacuum cleaner having a circuit for detecting the current of a rotary brush drive nozzle motor housed in a suction mouth, a self-diagnosis for checking whether there is an abnormality in the entire system of the vacuum cleaner as an operation switch of the vacuum cleaner. An operation switch is provided, and when the self-diagnosis operation switch is turned on, the brushless fan motor is operated at a constant speed and synchronously started, and the output of the temperature sensor provided in the vacuum cleaner body is sent to a temperature detection circuit and subjected to temperature detection processing. the output from the pressure sensor is detected by performing static pressure detection processing with a static pressure detection circuit, the current of the nozzle motor is detected by performing nozzle motor current detection circuit and nozzle motor current detection processing, detecting the current of the brushless fan motor by performing a fan motor current detection circuit and a fan motor current detection process; detecting the magnetic pole position of the rotor of the brushless fan motor via the magnetic pole position detection circuit;
A vacuum cleaner characterized in that an abnormal part is determined from these detection results and the determination results are displayed on a display circuit provided on the vacuum cleaner body.