JP2014155565A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner which detects whether a dust collection container is mounted or not without using mechanical detecting means.SOLUTION: An electric vacuum cleaner includes: an electric air blower 9 generating suction air; a dust collection container 20 detachably mounted on an upstream side of the electric air blower 9 for collecting dust; current detecting means 31 for detecting a current flowing through the electric air blower 9; phase angle control means 29d for controlling a phase angle of a voltage applied to the electric air blower 9 and controlling an input current into the electric air blower 9; calculation means 29a for increasing or decreasing the phase angle so that a detected current detected by the current detecting means 31 becomes close to a prescribed target current; an operation switch 8 for turning on/off the electric air blower 9; and dust collection container detecting means 29c for detecting whether the dust collection container 20 is mounted on the upstream side of the electric air blower 9 or not based on the phase angle increased or decreased by the calculation means 29a after a lapse of a prescribed period of time set beforehand after the operation switch 8 is turned on and a threshold value set beforehand.

Description

  The present invention relates to a vacuum cleaner in which a dust collection container for collecting dust is detachably mounted on an upstream side of suction air generated by an electric blower.

  There has been disclosed a vacuum cleaner provided with dust collection container detection means (such as a micro switch) for detecting whether or not a dust collection container is detachably disposed on the suction side (upstream side) of the electric blower (for example, Patent Document 1).

JP 2007-236520 A

  However, in such a vacuum cleaner, when a foreign substance is mixed in the vicinity of the microswitch, it may not be detected even though the dust collecting container is mounted at a predetermined position. In addition, the micro switch is pushed by a foreign object, erroneously detecting that the dust collecting container is mounted at a predetermined position even though the dust collecting container is not mounted at the predetermined position, and driving the electric blower. In addition to being unable to perform cleaning, there is a problem that separated dust may not be collected.

  In addition, since electronic parts such as microswitches are attached to the vacuum cleaner body as dust collection container detection means, circuit parts such as wiring and connectors that connect the microswitches and the substrate must be installed, and the circuit configuration is complicated. There is a problem that the cost of the electronic component as the dust container detection means is increased.

  The present invention has been made to solve such a problem, and provides a vacuum cleaner that detects whether or not a dust collecting container is mounted without using a mechanical detection means such as a microswitch. With the goal.

  The vacuum cleaner according to the present invention includes an electric blower that generates suction air, a dust collecting container that is detachably attached to the upstream side of the electric blower, and collects dust, and a current detection that detects a current flowing through the electric blower. A phase angle control means for controlling the input current of the electric blower by controlling the phase angle of the voltage applied to the electric blower, and the phase angle so that the detection current detected by the current detection means approaches a predetermined target current. Calculating means for increasing or decreasing the power, an operation switch for turning on / off the electric blower, and a phase angle increased or decreased by the calculating means after a predetermined time elapses after the operation switch is turned on Dust collection container detection for detecting whether or not the dust collection container is mounted on the upstream side of the electric blower based on the phase angle detection means and the phase angle detected by the phase angle detection means and a preset threshold value It is that a stage.

  According to the vacuum cleaner of the present invention, by adopting the above configuration, it is possible to reliably detect whether or not a dust collecting container that collects dust with a simple configuration is installed.

It is an external appearance perspective view of the vacuum cleaner concerning Embodiment 1, 2, and 3 of this invention. It is a perspective view of the state where a dust collecting container was removed from a vacuum cleaner main part of a vacuum cleaner concerning Embodiment 1, 2, and 3 of this invention. It is sectional drawing of the state which removed the dust collecting container from the cleaner body of the vacuum cleaner concerning Embodiment 1, 2, and 3 of this invention. It is a general-view perspective view of the hand hose in the vacuum cleaner concerning Embodiment 1, 2, and 3 of this invention. It is a circuit block diagram of the vacuum cleaner which concerns on Embodiment 1, 2 of this invention. It is a characteristic figure of the air volume of an electric blower, and electric current and input electric power in the vacuum cleaner concerning Embodiment 1, 2, and 3 of this invention. It is a basic characteristic figure which shows the correlation of the phase angle of an electric blower and input power in the vacuum cleaner which concerns on Embodiment 1, 2 of this invention, and the correlation of a phase angle and an electric current value. It is a figure explaining the phase angle control method in the vacuum cleaner which concerns on Embodiment 1, 2, 3 of this invention. It is a flowchart which shows operation | movement of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a flowchart which shows the operation | movement of the reference | standard phase angle calculation process of the vacuum cleaner which concerns on Embodiment 1, 2, 3 of this invention. It is a flowchart which shows operation | movement of the vacuum cleaner which concerns on Embodiment 2 of this invention. It is a circuit block diagram of the vacuum cleaner which concerns on Embodiment 3 of this invention. It is a basic characteristic figure which shows the correlation of the phase angle and electric current value of the electric blower of the vacuum cleaner which concerns on Embodiment 3 of this invention. It is a flowchart which shows operation | movement of the vacuum cleaner which concerns on Embodiment 3 of this invention.

Hereinafter, a vacuum cleaner according to the present invention will be described with reference to the drawings. Here, as an example, a vacuum cleaner that detachably attaches a cyclone-separated dust collection container to the vacuum cleaner body will be described, but also in a vacuum cleaner that detachably attaches a dust collector having a paper pack inside Applicable. Further, the dust collecting container is not limited to the main body of the vacuum cleaner, but can be applied to an electric vacuum cleaner that can be attached to and detached from the upstream side of the electric blower that generates suction air.
Embodiment 1 FIG.
[Configuration of vacuum cleaner]
FIG. 1 is an external perspective view of a vacuum cleaner according to Embodiment 1 of the present invention. As shown in FIG. 1, the vacuum cleaner 100 includes a suction tool 1, an extension pipe 2, a hand hose 3, a hose 4, and a vacuum cleaner body 5 having a suction port (not shown) opened on the lower surface. I have. The suction tool 1 sucks dust on the floor and the like together with air. The suction tool 1 incorporates a rotating brush (not shown) that sweeps up dust on the surface to be cleaned such as a floor surface and a carpet, and an electric motor 19 (see FIG. 5) that is a brush motor that drives the rotating brush. The rotating brush has a flocking (not shown) that contacts the surface to be cleaned and scrapes off dust. The rotating brush is driven by the electric motor 19 via a belt or the like.

  One end of a straight cylindrical extension pipe 2 is connected to the outlet side of the suction tool 1. The other end of the extension pipe 2 is connected to one end of a hand hose 3 provided with a handle provided with an operation switch 8 for controlling the operation of the vacuum cleaner 100. The operation switch 8 is a switch for switching on / off of the electric blower 9 that generates suction wind, strength of the suction wind, and on / off of the electric motor 19. One end of a flexible bellows-like hose 4 is connected to the other end of the hand hose 3. Further, the cleaner body 5 is connected to the other end of the hose 4.

  A wheel 6 is provided at the rear portion of the cleaner body 5, and the cleaner body 5 is movable by a front caster (not shown) and a wheel 6 provided on the front lower surface of the cleaner body 5. Moreover, the power supply cord 7 is connected to the cleaner body 5, and the power supply cord 7 is connected to an external power supply to energize, and the electric blower 9 (see FIG. 3) is driven to perform a suction operation. The suction tool 1, the extension pipe 2, the hand hose 3, and the hose 4 constitute a part of a suction path for allowing dust-containing air, which is air containing dust, to flow from the outside to the inside of the cleaner body 5.

  By operating the operation switch 8 and driving the electric blower 9 and the electric motor 19, dust on the surface to be cleaned is scraped up by the suction tool 1, and the extension pipe 2, the hand hose 3, the hose 4, and the electric vacuum cleaner 100. It is conveyed and collected in a dust collecting container 20 (see FIG. 2) built in the vacuum cleaner body 5. Then, the suction air is discharged from the electric vacuum cleaner main body 5.

  FIG. 2 is a perspective view of the cleaner body 5 and shows a state where the dust collecting container 20 is removed. FIG. 3 is a cross-sectional view of the cleaner body 5 and is a cross-sectional view taken along a vertical cross-sectional line passing through the main body inlet 17. As shown in FIGS. 2 and 3, the cleaner body 5 includes a main body case 10, a dust collecting container 20, and a connection component 30.

  A main body case 10 constituting the outer shell of the vacuum cleaner main body 5 includes a lower case 11 that opens at the top and accommodates the electric blower 9 and various control boards (not shown), and an upper case 12 that covers the opening of the lower case. And a hose connection port 13 to which the hose 4 can be connected. The hose connection port 13 is an inlet for air sucked into the cleaner body 5. The upper surface of the upper case 12 is configured to have a shape on which the dust collection container 20 can be placed.

  The main body pipe 14 (see FIG. 2) is made of various resins and has a function of connecting the hose connection port 13 to which the hose 4 is connected and the dust collecting container 20. The main body pipe 14 is provided on the main body case 10 along the longitudinal direction of the substantially cylindrical dust collecting container 20. A dust collection container connection port 15 is opened at the end of the main body pipe 14 on the side connected to the dust collection container 20.

  The exhaust hole 16 is composed of a large number of holes provided for exhausting the exhaust from the electric blower 9 to the outside, and is disposed at a position on the opposite side of the dust collecting container 20 so as to be substantially symmetrical with respect to the main body pipe 14. ing.

  A main body inlet 17 is opened at a position on the upper surface of the upper case 12 and almost directly above the electric blower 9. The air that flows out from the dust collecting container 20 passes through the main body inlet 17 and is sucked into the electric blower 9 built in the main body case 10.

  The dust collection container 20 collects dust contained in the air sucked by the suction force of the electric blower 9, and is connected to the electric blower 9 from the hose connection port 13 that is an inlet of suction air to the cleaner body 5. It constitutes a part of the leading suction path. The dust collection method of the dust collection container 20 may be either a cyclone method or a paper pack method. The dust collection container 20 is a box having a substantially cylindrical outer shell, and a swirl chamber and a dust collection chamber for collecting dust by a cyclone method are provided inside the dust collection container 20. In the dust collection container 20, a dust collection container inlet 21 is opened as an air inlet to the dust collection container 20, and a dust collection container outlet 22 is opened as an air outlet from the dust collection container 20. In addition, a dust collection container fixing portion 23 for detachably attaching the dust collection container 20 to the main body case 10 is provided. The dust collection container fixing portion 23 is formed in, for example, a bowl shape, and by engaging this bowl-shaped portion with a dust collection container fixing hole 18 formed in the main body case 10, the dust collection container 20 is placed in the main body case 10. Can be attached to.

  A primary filter 41 and a secondary filter 42 are provided in the main body case 10 on a path from the main body inlet 17 to the electric blower 9. The primary filter 41 and the secondary filter 42 are for collecting fine dust contained in the air discharged from the dust collecting container 20. Dust contained in the air sucked into the cleaner body 5 is basically collected in the dust collection container 20, but fine dust that could not be collected by the dust collection container 20 is transferred to the electric blower 9. In order to prevent suction, a primary filter 41 and a secondary filter 42 are provided. The primary filter 41 and the secondary filter 42 are comprised by the nonwoven fabric formed in the honeycomb shape, the corrugated shape, the pleat shape, and the flat plate shape, for example. The secondary filter 42 has a finer filter than the primary filter 41, and fine dust that has passed through the primary filter 41 is collected by the secondary filter 42.

  FIG. 4 is an external perspective view showing the hand hose 3 according to Embodiment 1 of the present invention. The hand hose 3 includes a connecting pipe 51, a grip part 52, and a lid part 53. The lid 53 has an operation switch 8, and the operation switch 8 is a switch for switching on / off of the electric blower 9, setting of the strength of suction air, and on / off of the electric motor 19. The connecting pipe 51 is composed of a hose connecting part (not shown) to which the hose 4 is connected and an extension pipe connecting part (not shown) to which the extension pipe 2 is connected, and 54 is a hose divided into two vertically. It is a cover.

[Configuration of electrical circuit]
FIG. 5 is a circuit configuration diagram of the electric vacuum cleaner according to Embodiment 1 of the present invention.
The vacuum cleaner of the present embodiment is composed of four blocks: a vacuum cleaner body 5, a hand hose 3 + hose 4, an extension pipe 2, and a suction tool 1.

  In FIG. 5, 24 is a commercial AC power source, 25 is a 15 A current fuse, and is a protective device when the electric blower 9 becomes locked or otherwise becomes abnormal due to a short circuit. Reference numeral 26 denotes a 4A current fuse, which is a protective device when the electric motor 19 is locked or when it becomes abnormal due to a short circuit.

  In the block of the cleaner body 5, reference numeral 27 denotes a DC power supply device whose input side is connected to the electrolytic capacitor C <b> 1 and outputs a predetermined DC voltage (12 V) from the output side. D1 is a diode that rectifies the output of the commercial AC power supply 24, 28 is a constant voltage power supply that is connected to the electrolytic capacitor C2 on the input side and outputs a predetermined constant voltage from the output side, and C2 suppresses oscillation of the constant voltage power supply 28. Electrolytic capacitor for C3 is an electrolytic capacitor for stabilizing the output of the constant voltage power supply 28. The constant voltage power supply 28 supplies a 5 V voltage to the microcomputer (control means) 29, the operation switch 8, and the current detection means 31. Reference numeral 34 denotes a triac (bidirectional thyristor) for driving the electric blower 9 built in the cleaner body 5.

  The current detection means 31 detects the current value flowing through the electric blower 9. A current sensor 31a, which is a current transformer, is connected in series with the electric blower 9. For example, the current (see FIG. 8) flowing through the motor that rotationally drives the electric blower 9 is subjected to full-wave rectification, and a plurality of current values at the timing of the zero cross point of the voltage of the commercial AC power supply are compared with the current smoothed by the smoothing capacitor Detect on average.

  The microcomputer (control means) 29 is a calculation means 29a, a phase angle detection means 29b, a dust collection container detection means 29c, a phase angle control means 29d, an operation detection means 29e, a display control means 29f, and a ROM (not shown). Prepared).

  The calculating means 29a is connected to the current detecting means 31. The calculating means 29a is set with a phase angle-target current characteristic obtained in advance as a characteristic for obtaining the target electric power input to the electric blower 9, and an initial phase angle for firing the triac 34 for driving the electric blower 9 is set. A predetermined target current corresponding to the phase angle is obtained based on the phase angle-target current characteristic, and the detected current detected by the current detecting means 31 is compared with the target current, and the detected current is determined as the target current. Repeat increasing or decreasing the initial phase angle to approach the current. Here, the phase angle refers to an ignition phase angle that turns on a bidirectional thyristor of the triac 34 for driving the electric blower 9 or the triac 35 for driving the brush motor 19 that will be described later. The phase angle is referred to as a phase angle. The phase angle-target current characteristic obtained in advance as a characteristic for obtaining the target power input to the electric blower 9 is a vacuum cleaner body 5 in which the dust collecting container 20 is upstream of the electric blower 9 as will be described later. It is set in a region where the air volume is 100% when not mounted on the upper limit.

  The phase angle control means 29 d controls the input current of the electric blower 9 by controlling the phase angle of the voltage applied to the electric blower 9. Specifically, the phase angle control unit 29d controls the current value of the electric blower 9 based on the phase angle that is increased or decreased by the calculation unit 29a so that the detection current of the current detection unit 31 approaches the target current.

  The phase angle detection unit 29b calculates the phase angle that the calculation unit 29a increases / decreases from the initial phase angle after the lapse of a predetermined time (T1) after the operation switch 8 is turned on, as a target current and a detection current of the current detection unit 31. Are detected as reference phase angles that are considered to be equal. The phase angle detection means 29b is a microcomputer (control means) 29 as hardware, and detects the reference phase angle output to the electric blower triac 34. As will be described later, since the increment of the initial phase angle is a fixed value, generally the target current and the detected current of the current detecting means 31 are rarely completely equal. Assuming that the phase angle at which both are completely equal is the convergence phase angle, the initial phase angle is repeatedly increased and decreased across the convergence phase angle, and the detection current is also increased and decreased in response to this. Therefore, after a predetermined time (T1) has elapsed since the operation switch 8 was turned on, the phase angle obtained by the calculation unit 29a increasing or decreasing from the initial phase angle is a phase in which the target current and the detection current of the current detection unit 31 are equal. It is assumed that it is determined as an angle (reference phase angle), and this reference phase angle is output to the dust container detection means 29c described later.

  Thereafter, with respect to the phase angle of the voltage applied to the electric blower 9, the phase angle before the lapse of the predetermined time (T1) from when the operation switch 8 is turned on is set as the initial phase angle, and after the lapse of the predetermined time (T1), A phase angle (a phase angle corresponding to a target current on a target current characteristic IWR (CTM1), which will be described later) considered to be equal to the target current and the detection current of the current detection unit 31 is set as a reference phase angle. What is simply described as phase angle includes both the initial phase angle and the reference phase angle.

  The dust collection container detection unit 29c determines whether the reference phase angle detected by the phase angle detection unit 29b is equal to or larger than a preset threshold value or less than the threshold value, thereby cleaning the dust collection container 20 upstream of the transmission blower 9. It is detected whether or not the machine body 5 is properly set, and the detection information is sent to the phase angle control means 29d. This threshold is the reference phase angle in the phase angle-target current characteristic when the dust volume is 100% when the dust collecting container 20 is attached to the cleaner body 5 upstream of the electric blower 9 and the dust volume is zero. (First phase angle). If the dust collecting container 20 is not set at a predetermined position, there is no pressure loss, which is the air path resistance of the dust collecting container 20, and the amount of air sucked by the electric blower 9 increases. Then, the calculation means 29a increases the initial phase angle of the electric blower 9 in order to reduce the input power of the electric blower 9 so as to reduce the air volume to be sucked. Since the reference phase angle determined after the initial phase angle is increased or decreased and a predetermined time elapses is larger than the first phase angle, it is determined whether or not the dust container 20 is appropriately set in the cleaner body 5. Judgment can be made.

  Further, the phase angle control means 29d controls the value of the current flowing through the electric blower 9 based on the detection result of the dust collection container detection means 29c. Further, the phase angle control unit 29d controls the electric motor 19 based on the detection result of the dust collection container detection unit 29c. The phase angle control means 29 d controls the value of the current flowing through the electric motor 19 by controlling the phase angle of the current flowing through the electric motor 19.

The display control unit 29f controls the display unit 32.
When the dust collection container detection means 29c detects that the dust collection container 20 is not properly set in the cleaner body 5 upstream of the electric blower 9, the display control means 29f A display signal indicating that the dust collecting container 20 is not properly set in the cleaner body 5 is output.

  Further, since the rotary brush is driven in a state where the dust collecting container 20 is not properly set in the cleaner body 5, air is not sucked from the suction port of the suction tool 1, and the electric motor 19 is not cooled. Therefore, when the dust collection container detection means 29c detects that the dust collection container 20 is not properly set in the cleaner body 5, the display control means 29f causes the display unit 32 and the electric motor 19 to be hot. A display signal to that effect is output.

  The driving detection unit 29e detects the driving state from the switch pressed in the operation switch 8. Reference numeral 35 denotes a triac (bidirectional thyristor) for driving the electric motor 19 that is built in the cleaner body 5 and drives the electric motor 19. Reference numeral 36 denotes a safety switch for stopping a rotating brush (not shown) when the suction tool 1 is lifted into the air.

  An operation switch 8 is included in the block of the hose 4 + the hand hose 3. Three piano wires are built in the hose 4 and serve also as signal wires.

  The operation switch 8 includes switches SW1 to SW4 and resistors R6 to R10. SW 1 is a switch for turning on the electric motor 19. SW <b> 2 is a middle mode and operates with a constant output of about 600 W to rotate the electric motor 19. When SW2 is pressed again, the mode is changed to the weak mode, the output is operated at about 300 W, and the electric motor 19 is rotated. In the SW3 strong mode, the output is operated at a constant value of about 1000 W, and the electric motor 19 is rotated. SW 4 is a switch for stopping the electric blower 9 and the electric motor 19.

  When the switches SW1, SW2, SW3, and SW4 are pressed (ON), the circuits of the resistors R7, R8, R9, and R10 connected in series with the respective switches are closed. When the pressure is released, the switches SW1, SW2, SW3, SW4 open a circuit with resistors R7, R8, R9, R10 connected in series with the respective switches. Therefore, only the circuit of the resistor R6 is closed when the switches SW1, SW2, SW3, and SW4 are not pressed.

  Depending on the combination of the ON states of the switches SW1 to SW4, the partial pressure of the resistors R4 and R6 incorporated in the circuit on the cleaner body 5 side (when the switches SW1 to SW4 are all OFF), or R6 and R7, R8, The input voltage of the microcomputer 29 changes due to the parallel resistance of R9 and R10 and the voltage division of R4 (when any of the switches SW1 to SW4 is ON). The microcomputer 29 determines the operating state according to the input voltage, and controls the power supplied to the electric blower 9 and the electric motor 19 according to the ON state of the switches SW1 to SW4 of the operation switch 8.

Next, characteristic diagrams shown in FIGS. 6 to 7 will be described.
The solid curve shown in FIG. 6 represents current, and the dotted line represents input power. As shown in the characteristic diagram of current and input power, in order to control the input power to be constant, a target current that decreases as the air volume is reduced may be set. Since the setting of the target current depends on the air volume and the characteristics of the electric blower 9, a setting corresponding to the type of the vacuum cleaner is necessary, and each characteristic shown in FIG. 6 is obtained in advance.

  FIG. 7 is a diagram showing the basic characteristics of phase angle-input power characteristics, phase angle-current characteristics, and phase angle-target current characteristics (target current calculation formula) as described above. Basic characteristics are obtained in advance through experiments or the like. This is an input power characteristic (measured by a measuring instrument not shown) and a current characteristic (measured by the current detection means 31) when the electric blower 9 is controlled by changing the phase angle by the phase angle control means 29d. The phase angle-target current characteristic is derived from the basic characteristics described above, and is for controlling the input power.

In the phase angle-input power characteristic, the horizontal axis indicates the phase angle, and the right vertical axis indicates the input power. In addition, five parameters (100%>a>b>c> d) from an air volume of 100% (dust amount of zero) to an air volume of d% (large dust volume) are described with the air volume as a parameter.
In addition, 100% air volume (with a dust collection container) in FIG. 7 indicates characteristics when the dust collection container 20 is attached. 100% air volume (without dust collection container) indicates the characteristics when the dust collection container 20 is not attached. When calculating the phase angle-target current characteristics, use the 100% air volume (with dust collection container) characteristics. Ask. When the phase angle is 100%, the input power decreases as the phase angle increases, and also at the phase angle 0, the input power decreases as the air flow is reduced. Furthermore, as the airflow increases, the rate of decrease in input power increases as the phase angle increases.

  In the phase angle-current characteristic of the basic characteristics, the left vertical axis indicates the current detected by the current detection means 31, and the horizontal axis indicates the phase angle. As for the air volume parameter, five types and the characteristics of 100% air volume (no dust collecting container) are described in the same manner as the phase angle-input power characteristics.

  A target current calculation formula for controlling the input power to be constant is obtained using the characteristics of FIG. The area where constant control of the input power is required is from the vicinity of the air volume of 100% to the vicinity of the air volume d. Here, for example, the target input power near the air volume of 100% is WR100, and the target input power near the air volume d is the target input power. For example, assuming WRd, a method for calculating a target current calculation formula for realizing each target input power will be described below.

  For example, when WR is set as the target input power, the input power and the air volume set as the target are changed from the intersection (WR100 (present), WRa, WRb, WRc, WRd) of the set input power WR and the air volume 100% to the air volume d. The corresponding phase angles (θWRd, θWRc, θWRb, θWRa, θWR100 (present)) can be derived respectively. The input power is controlled to be constant within the phase angle range θWRd to θWR100 (existing) corresponding to the target input power WR.

  In the phase angle-current characteristics, the phase angles derived from the phase angle-input power characteristics (θWRd, θWRc, θWRb, θWRa, θWR100 (existing)) and the air volume 100% to the air volume d (IWR100 (existing), IWRa, When IWRb, IWRc, and IWRd) are plotted, a phase angle-target current characteristic IWR (CTM1) in θWRd to θWR100 (present) is obtained. A part of the phase angle-target current characteristic corresponds to the target input power WR, and the input power at each air volume is constant. The characteristic IWR expressed by a linear equation is a target current calculation formula for the constant input power region, and the target current calculation formula for the constant input power region can be expressed by a primary approximation formula such as y = ax + b. However, y is a target current value, x is a phase angle, and a and b are constants.

  In the phase angle-current characteristic, when the energization of the electric blower 9 is started by turning on the operation switch 8, the calculation unit 29a gives the phase angle control unit 29d the pre-stored start phase angle PWSS as the initial phase angle PWS. To drive the electric blower 9. Here, when the dust volume is zero when the dust container 20 is attached, the reference phase angle PWS when the air volume is 100% is θWR100 (existing), and when the dust volume is zero when the dust container 20 is not attached. Assuming that the reference phase angle PWS when the air volume is 100% is θWR100 (none), there is a relationship of θWR100 (present) <θWR100 (none). The starting phase angle PWSS is set larger than θWR100 (none). By setting in this way, the rotation of the electric blower 9 starts slowly when energization to the electric blower 9 is started.

  When driving of the electric blower 9 is started by the start phase angle PWSS, when the dust collecting container 20 is mounted, the dust collecting container 20 is mounted from the state of the current Ia when the dust volume is zero and the air volume is 100%. If there is no dust, the dust is collected in the dust collecting container 20 from the current Ib state in the state where the dust amount is zero and the current value corresponding to each air amount in the state where the dust amount is less than 100%. Start to start. Next, the arithmetic means 29a is configured to use an electric blower with θWR100 (existing) (the reference phase angle (with PWS) when the dust amount is zero when the dust collecting container 20 is attached) as the initial phase angle PWS. Command 9 to be driven.

  Thereafter, the calculation unit 29a subtracts the initial phase angle PWS from the start phase angle PWSS so that the detection current detected by the current detection unit 31 approaches the target current value CTM1 (IWR) based on the phase angle-target current characteristics, and detects the current. The process is repeated until the detected current of the means 31 becomes equal to the target current value CTM1 (IWR). Since the step size for decreasing the initial phase angle is a fixed value as will be described later, there are few cases where the detected current of the flow detecting means 31 is equal to the target current value CTM1 (IWR). For this reason, after the lapse of a predetermined time (T1) after the operation switch 8 is turned on, the phase angle in which the calculation means 29a increases or decreases from the initial phase angle is a phase in which the target current and the detection current of the current detection means 31 are equal. It is regarded as an angle (reference phase angle). When the amount of dust is zero when the dust container 20 is attached, the initial phase angle PWS is determined as the reference phase angle θWR100 (present). Similarly, when the amount of dust is zero when the dust container 20 is not attached, the initial phase angle PWS is determined as the reference phase angle θWR100 (none). Here, the predetermined time T1 is obtained in advance as a time for convergence so that the target current value CTM1 (IWR) and the detected current of the current detecting means 31 are substantially equal, and stored in the microcomputer ROM.

  The reference phase angle (without PW1S) when the dust collection container 20 is not mounted, θWR100 (without), is a threshold value for determining whether or not the dust collection container 20 is mounted. When the initial phase angle output from the calculation means 29a after the predetermined time T1 is equal to or greater than the reference phase angle (without PW1S), the dust collection container detection means 29c determines that the dust collection container 20 is not mounted, and the dust collection container If it is less than the reference phase angle (no PW1S), it is determined that the dust container 20 is attached.

FIG. 8 is a conceptual diagram of the phase angle control method, showing the voltage waveform of the commercial power supply and the motor ON waveform. The phase angle control controls the operation point of the electric blower 9 from the zero point (zero cross point) of the commercial power supply. The operating point (delay time) of the electric blower 9 is calculated as follows from the zero point of the commercial power supply.
Delay time (ms) = (phase angle counter value) × 32 μs.
The phase angle counter value ranges from 0 to 255, and the phase angle counter value is stored corresponding to the above-described θWR value phase angle (θWRd, θWRc, θWRb, θWRa, θWR100 (present)).
32 μs is a delay time calculation timer value of the microcomputer 29.
The hatched portion of the motor ON waveform is the operation OFF of the electric blower 9, and the shaded portion is the operation ON state of the electric blower 9.

Next, the operation will be described.
When the vacuum cleaner 100 is used, the dust collection container connection port 15 and the dust collection container inlet 21 are connected, and the main body inlet 17 and the dust collection container outlet 22 are connected to collect dust. The container 20 is placed on the upper surface of the main body case 10, and the dust collection container 20 is fixed to the main body case 10 by the dust collection container fixing portion 23 and the dust collection container fixing hole 18. When the operation switch 8 is operated to drive the electric blower 9 accommodated in the main body case 10, the dust-containing air sucked by the suction force of the electric blower 9 passes through the hose connection port 13 to the main body pipe 14. It enters the dust container 20 through the dust container connection port 15 and the dust container inlet 21. Dust contained in the air taken into the dust container 20 is collected in the dust container 20. The air after the dust is collected in the dust collecting container 20 enters the main body case 10 through the dust collecting container outlet 22 and the main body inlet 17 and passes through the primary filter 41 and the secondary filter 42. . At this time, fine dust contained in the air is collected by the primary filter 41 and the secondary filter 42. The air that has passed through the primary filter 41 and the secondary filter 42 reaches the electric blower 9 and is exhausted from the exhaust hole 16 through an internal passage (not shown). When dust collects in the dust collection container 20, the dust collection container 20 is removed from the main body case 10, and the collected dust is discarded.

  Next, operation | movement of the vacuum cleaner of this Embodiment 1 is demonstrated using FIG.9 and FIG.10. FIG. 9 is a flowchart showing the operation of the first embodiment of the present invention, and FIG. 10 is a flowchart showing the operation of the reference phase angle calculation process.

When it is detected that the power is turned on by operating the operation switch 8 (S100), the computing means 29a of the microcomputer 29 sets the start phase angle PWSS stored in the microcomputer ROM (not shown) in the phase angle control means 29d ( Next, a reference phase angle calculation timer (predetermined time T1) stored in the microcomputer ROM (not shown) is set in the time measuring means (not shown) (S102). The start phase angle PWSS is a phase angle for starting the operation of the electric blower 9 as shown in FIG. 7, and from the point Ia (the state where the phase angle is PWSS and the current value is Ia) when the dust collecting container is attached. When the dust collecting container is not mounted, the process starts from the point Ib (the phase angle is PWSS and the current value is Ib).
The phase angle at the intersection of the target current CTM1 and the characteristic curve of 100% airflow from the electric blower 9 is θWR100 (with) when the dust container is installed, and θWR100 (without) when the dust container is not installed. The time T1 is a time for calculating the phase angle (reference phase angle) at the intersection with the characteristic curve with 100% air volume.

  The phase angle control means 29d drives the electric blower drive triac 34 based on the initial phase angle PWS set as the start phase angle PWSS, and controls the phase angle of the voltage applied to the electric blower 9 (S103). At this time, the current detection means 31 detects the current CT based on the phase control flowing through the electric blower 9 (S104), and the calculation means 29a calculates the target current CTM1 corresponding to the set initial phase angle PWS (S105). ). The time measuring means (not shown) starts measuring (incrementing) a predetermined time when the current CT detected by the current detecting means 31 is input. This is because, when the current detection means 31 detects the value of the current flowing through the electric blower 9, the current flowing through the motor that rotationally drives the electric blower 9 is full-wave rectified, and the current smoothed by the smoothing capacitor is commercialized. This is a process for detecting the current value at the timing of the zero cross point of the voltage of the AC power source by averaging it a plurality of times.

  Further, the calculation means 29a determines whether or not the calculation of the reference phase angle PW1S of the electric blower 9 has been completed (S106), and when the calculation of the reference phase angle PW1S has been completed (S108). When the calculation of the reference phase angle PW1S is not completed, the process for calculating the reference phase angle PW1S is started (S107). In this process, as shown in FIG. 10, it is determined whether or not the predetermined time T1 has passed through time measuring means (not shown) (S116), and when the predetermined time T1 has passed, the process proceeds to S117. When the predetermined time T1 has not elapsed, the process proceeds to (S115), and the calculation time increment is continued.

  While repeating this operation, as shown in FIG. 10, when the measurement time of the time measuring means (not shown) has passed a predetermined time T1, the process proceeds from S116 to S117, and the time measuring means (not shown). ) Is cleared (S117), and the calculation of the reference phase angle PW1S is started. In this case, as shown in FIG. 7, since the target current CTM1 and the detected current CT are considered to be equal, the phase angle detected by the phase angle detecting means 29b is set as the reference phase angle PW1S (S118). The reference phase angle PW1S is “when the dust container 20 is attached”, “when the container has a reference phase angle (with PW1S)”, and when the dust container 20 is not attached, “the container no-time reference phase angle (PW1S)”. No) "and proceeds to S108.

  In S108, using the phase angle (threshold value) in a state where the dust collection container 20 that has been obtained in advance is not mounted, whether or not the reference phase angle PW1S detected by the phase angle detection means 29b is greater than or equal to the threshold value is detected. It detects from 29c (S108). When the reference phase angle PW1S is detected to be greater than or equal to the threshold value, the rotational speed of the electric blower 9 is reduced or stopped by the phase angle control means 29d (S113), and the dust collecting container 20 is attached to the electric blower 100 by the display control means 29f. The display not displayed is output to the display unit 32 (S114). This state is continued after the process of S114.

If it is determined in S108 that the reference phase angle PW1S is less than the threshold value, the process proceeds to S109, and the electric blower 9 continues to rotate.
Thereafter, when it is determined that the reference phase angle PW1S is equal to or greater than the threshold value (S108), it is determined that the dust collecting container 20 is not mounted, and the rotational speed of the electric blower 9 is reduced or stopped by the phase control means 29d. From 29f, a display indicating that the dust container 20 is not attached to the cleaner body 5 is output to the display unit 32. By configuring in this way, cleaning is started in a state where the dust collecting container 20 is mounted, and even when the dust collecting container 20 is mistakenly installed or removed during cleaning, the user In addition, it is possible to know that there is a problem with the installation of the dust collecting container 20, and an easy-to-use vacuum cleaner can be obtained.

If it is determined in S108 that the reference phase angle PW1S is less than the threshold value, the process proceeds to (S109).
The calculating means 29a compares the detected current CT of the current detecting means 31 with the target current CTM1 (S109), and proceeds to S110 when the CT and CTM1 are not equal, but when CT and CTM1 are equal, the phase is calculated. The phase angle control operation of the electric blower 9 by the angle control means 29d is continued. When it is determined that the detection current CT of the current detection means 31 is not equal to the target current CTM1, the magnitudes of CT and CTM1 are compared (S110). When the detected current CT is larger, the initial phase angle is increased in steps of 0.576 ° (phase difference corresponding to a delay time of 32 μs when the commercial power supply frequency is 50 Hz) (S112). The control operation is performed (S103). This operation is repeated while CT is larger. On the other hand, every time the phase angle is increased by 0.576 °, the calculation unit 29b calculates the target current CTM1 based on the phase angle. This operation is repeated until the calculated target current CTM1 is equal to the detected current CT each time.

  When it is determined that the target current CTM1 is larger than the detected current CT, the initial phase angle is decreased by 0.576 ° from the phase angle (S111), and the electric blower 9 is controlled with the phase angle. This operation is repeated while the target current CTM1 is larger than the detection current CT. On the other hand, every time the phase angle is reduced by 0.576 °, the calculation unit 29b calculates the target current CTM1 based on the phase angle. This operation is repeated until the calculated target current CTM1 is equal to the detected current CT each time.

  Note that after S114, the processing from S103 onward may be repeated. That is, after the predetermined time T1 has elapsed, the phase angle detection unit 29d continuously repeats the detection of the phase angle increased or decreased by the calculation unit 29a, and the dust collection container detection unit 29c displays the detection result of the phase angle detection unit 29d. On the basis of this, the detection of whether or not the dust collecting container 20 is attached to the cleaner body 5 on the upstream side of the electric blower 9 may be continuously repeated. With this configuration, after detecting that the dust collecting container 20 is not mounted in S108, the user of the vacuum cleaner 100 notices that the dust collecting container 20 is not mounted, and the dust collecting container 20 By mounting the, the cleaning operation can be started, and a convenient vacuum cleaner can be obtained.

  As described above, according to the first embodiment, based on the phase angle detected by the phase angle detection means and the preset threshold value, it is detected whether or not the dust collection container is mounted on the upstream side of the electric blower. Therefore, it is possible to reliably detect whether or not a dust collecting container for collecting dust is attached.

  In addition, after the elapse of a predetermined time after the operation switch is turned on, the phase angle detection means continuously repeats the detection of the phase angle increased or decreased by the calculation means, and the dust collection container detection means Since the detection of whether or not the dust collection container is mounted on the upstream side of the electric blower is continued based on the detection result of the detection means, the initial dust collection container that has started driving the electric blower is mounted After that, when the dust collection container is removed, or when the electric dust blower is started, the initial dust collection container is not installed and the dust collection container is installed. Can be detected, and a convenient vacuum cleaner can be obtained.

  Further, the threshold of the phase angle for judging whether or not the dust collecting container is mounted is set to the phase angle when the dust volume is zero when the dust collecting container is not mounted on the upstream side of the electric blower. Since the phase angle in the target current characteristic is used, it is possible to accurately detect whether the dust container is attached or not.

  Moreover, since the phase angle control means lowers the rotational speed of the electric blower or stops the rotation of the electric blower based on the detection result of the dust collecting container detection means, a convenient vacuum cleaner can be obtained.

  Further, the display control means includes a display unit and a display control unit for controlling the display unit. Based on the detection result of the dust collection container detection unit, the display control unit determines whether the dust collection container is mounted on the upstream side of the electric blower. Is displayed so that the user can easily check the mounting state of the dust collecting container and obtain an easy-to-use vacuum cleaner.

Embodiment 2. FIG.
Next, operation | movement of the vacuum cleaner of this Embodiment 2 is demonstrated using FIG.11 and FIG.10. In the second embodiment, the control of the electric motor is added to the control of the electric blower in the first embodiment. FIG. 11 is a flowchart showing the operation of the second embodiment of the present invention, and FIG. 10 is a flowchart showing the operation of the reference phase angle calculation process.

When the power ON by the operation of the operation switch 8 is detected (S200), the calculation means 29a of the microcomputer 29 sets the start phase angle PWSS stored in the microcomputer ROM (not shown) in the phase angle control means 29d ( Next, a reference phase angle calculation timer (predetermined time T1) stored in the microcomputer ROM (not shown) is set in the time measuring means (not shown) (S202). The start phase angle PWS is a phase angle for starting the operation of the electric blower 9 as shown in FIG. 7, and from the point Ia (the state where the phase angle is PWSS and the current value is Ia) when the dust collecting container is attached. When the dust collecting container is not mounted, the process starts from the point Ib (the phase angle is PWSS and the current value is Ib).
The phase angle at the intersection of the target current CTM1 and the characteristic curve of 100% airflow from the electric blower 9 is θWR100 (with) when the dust container is installed, and θWR100 (without) when the dust container is not installed. The time is a time for calculating the phase angle (reference phase angle) at the intersection with the characteristic curve of 100% air volume.

  The phase angle control means 29d drives the electric blower drive triac 34 based on the initial phase angle PWS set as the start phase angle PWSS, and controls the phase angle of the voltage applied to the electric blower 9 (S203). Further, the electric motor driving triac 35 is driven to operate the electric motor 19 (S204). The current detection means 31 detects the current CT based on the phase control flowing through the electric blower 9 (S205), and the calculation means 29a calculates the target current CTM1 corresponding to the set initial phase angle PWS (S206). . Further, the time measuring means (not shown) starts measuring (incrementing) a predetermined time when the current CT detected by the current detecting means 31 is inputted, as in the first embodiment.

  In addition, the calculation unit 29a determines whether or not the calculation of the reference phase angle PW1S of the electric blower 9 is finished (confirmed) (S207), and when the calculation of the reference phase angle PW1S is finished (S209). If the calculation of the reference phase angle PW1S is not completed, the process for calculating the reference phase angle PW1S is started (S208). In this process, as shown in FIG. 10, it is determined whether or not the predetermined time T1 has passed through time measuring means (not shown) (S116), and when the predetermined time T1 has passed, the process proceeds to S117. When the predetermined time T1 has not elapsed, the process proceeds to (S115), and the calculation time increment is continued.

  While repeating this operation, as shown in FIG. 10, when the measurement time of the time measuring means (not shown) has passed a predetermined time T1, the process proceeds from S116 to S117, and the time measuring means (not shown). ) Is cleared (S117), and the calculation of the reference phase angle PW1S is started. In this case, as shown in FIG. 7, since the target current CTM1 and the detected current CT are considered to be equal, the phase angle detected by the phase angle detecting means 29b is set as the reference phase angle PW1S (S118). The reference phase angle PW1S is “when the dust container 20 is attached”, “when the container has a reference phase angle (with PW1S)”, and when the dust container 20 is not attached, “the container no-time reference phase angle (PW1S)”. No) ”and the process proceeds to S209.

  In S209, using the phase angle (threshold value) in a state where the dust collection container 20 is not mounted, which is obtained in advance by experiment, the dust collection container detection means determines whether the reference phase angle PW1S detected by the phase angle detection means 29b is equal to or greater than the threshold value. It detects from 29c (S209). When the reference phase angle PW1S is detected to be equal to or greater than the threshold value, the rotational speed of the electric motor 19 is reduced or stopped by the phase angle control means 29d (S214), and the dust collecting container 20 is attached to the electric blower 100 from the display control means 29f. No display is output to the display unit 32 (S215). This state is continued after the process of S215.

If it is determined in S209 that the reference phase angle PW1S is less than the threshold value (S210), the electric blower 9 and the electric motor 19 continue to rotate.
Thereafter, when it is determined that the reference phase angle PW1S is equal to or greater than the threshold value (S209), it is determined that the dust collecting container 20 is not attached, and the rotation speed of the electric motor 9 is reduced or stopped by the phase control means 29d. Accordingly, a display indicating that the dust container 20 is not mounted on the cleaner body 5 is output to the display unit 32 (S215). This state is continued after the process of S215.

If it is determined in S209 that the reference phase angle PW1S is less than the threshold, the process proceeds to (S210).
Thereafter, when it is determined that the reference phase angle PW1S is equal to or greater than the threshold value (S209), it is determined that the dust collecting container 20 is not mounted, and the rotation speed of the electric motor 9 is reduced or stopped by the phase control means 29d, and the display control means 29f Accordingly, a display indicating that the dust container 20 is not attached to the cleaner body 5 and a display indicating that the electric motor 19 is at a high temperature are output to the display unit 32. By configuring in this way, cleaning is started in a state where the dust collecting container 20 is mounted, and even when the dust collecting container 20 is mistakenly installed or removed during cleaning, the user In addition, it is possible to know that there is a problem with the installation of the dust collecting container 20, and an easy-to-use vacuum cleaner can be obtained.

If it is determined in S209 that the reference phase angle PW1S is less than the threshold, the process proceeds to (S210).
The calculating means 29a compares the detected current CT of the current detecting means 31 with the target current CTM1 (S210), and if CT and CTM1 are not equal, the process proceeds to S211. If CT and CTM1 are equal, the phase is calculated. The phase angle control operation of the electric blower 9 and the electric motor 19 by the angle control means 29d is continued. When it is determined that the detection current CT of the current detection means 31 is not equal to the target current CTM1, the magnitudes of CT and CTM1 are compared (S211). When the detected current CT is larger, the initial phase angle is increased in steps of 0.576 ° (phase difference corresponding to a delay time of 32 μs when the commercial power supply frequency is 50 Hz) (S213). The control operation is performed (S203). Further, the operation of the electric motor 19 is continued (S204). This operation is repeated while CT is larger. On the other hand, every time the phase angle is increased by 0.576 °, the calculation unit 29b calculates the target current CTM1 based on the phase angle. This operation is repeated until the calculated target current CTM1 is equal to the detected current CT each time.

  When it is determined that the target current CTM1 is larger than the detected current CT, the initial phase angle is decreased by 0.576 ° from the phase angle (S212), and the electric blower 9 is controlled with the phase angle. The operation of the electric motor 19 is also continued. This operation is repeated while the target current CTM1 is larger than the detection current CT. On the other hand, every time the phase angle is reduced by 0.576 °, the calculation unit 29b calculates the target current CTM1 based on the phase angle. This operation is repeated until the calculated target current CTM1 is equal to the detected current CT each time.

  Note that after S215, the processing from S203 onward may be repeated. That is, after the predetermined time T1 has elapsed, the phase angle detection unit 29d continuously repeats the detection of the phase angle increased or decreased by the calculation unit 29a, and the dust collection container detection unit 29c displays the detection result of the phase angle detection unit 29d. On the basis of this, the detection of whether or not the dust collecting container 20 is attached to the cleaner body 5 on the upstream side of the electric blower 9 may be continuously repeated. By configuring in this way, after detecting that the dust container 20 is not mounted in S209, the user of the vacuum cleaner 100 notices that the dust container 20 is not mounted, and the dust container 20 By mounting the, the cleaning operation can be started, and a convenient vacuum cleaner can be obtained.

  As described above, according to the second embodiment, based on the phase angle detected by the phase angle detection means and the preset threshold value, it is detected whether or not the dust collecting container is mounted on the upstream side of the electric blower. Therefore, it is possible to reliably detect whether or not a dust collecting container for collecting dust is attached. In addition, it is possible to provide a vacuum cleaner with a simple circuit configuration and low cost.

  In addition, when the electric motor 19 is operating in a state where the dust collecting container 20 is not attached, the electric motor 19 does not have suction air from which the electric blower 9 is operating, and thus the temperature of the electric motor 19 rises. Although there was a problem, when the dust collecting container 20 is not mounted as in the second embodiment, the temperature increase of the electric motor 19 can be prevented by reducing or stopping the rotation speed of the electric motor 19. .

  In addition, after the elapse of a predetermined time after the operation switch is turned on, the phase angle detection means continuously repeats the detection of the phase angle increased or decreased by the calculation means, and the dust collection container detection means Since the detection of whether or not the dust collection container is mounted on the upstream side of the electric blower is continued based on the detection result of the detection means, the initial dust collection container that has started driving the electric blower is mounted After that, when the dust collection container is removed, or when the electric dust blower is started, the initial dust collection container is not installed and the dust collection container is installed. Can be detected, and the control of the electric motor is changed accordingly, so that a convenient vacuum cleaner can be obtained.

  Further, the threshold of the phase angle for judging whether the dust collecting container is mounted or not is set to the phase angle when the dust volume is zero when the dust collecting container is not mounted on the upstream side of the electric blower and the target when the air volume is 100%. Since the phase angle in the current characteristic is used, it is possible to accurately detect whether the dust container is attached or not.

  Further, since the phase angle control means lowers the rotation speed of the electric motor or stops the rotation of the electric motor based on the detection result of the dust collecting container detection means, an easy-to-use vacuum cleaner can be obtained.

  Further, the display control means includes a display unit and a display control unit for controlling the display unit. Based on the detection result of the dust collection container detection unit, the display control unit determines whether the dust collection container is mounted on the upstream side of the electric blower. Is displayed so that the user can easily check the mounting state of the dust collecting container and obtain an easy-to-use vacuum cleaner.

Embodiment 3 FIG.
FIG. 12 is a circuit configuration diagram of a vacuum cleaner according to Embodiment 3 of the present invention. The third embodiment has substantially the same configuration as that of the first embodiment, except that a phase angle correction unit is provided. 12 is substantially the same as the circuit configuration diagram of FIG. 5, and therefore, the phase angle correction means 29g different from FIG. 5 will be described.

  The phase angle correction means 29g is connected to the dust container detection means 29c and the phase angle control means 29d. The phase angle correction unit 29g determines that the reference phase angle PW1S detected by the phase angle detection unit 29b is equal to or larger than the phase angle (threshold value) in a state in which the dust collection container 20 is not mounted, which is obtained in advance by experiments. When the detection means 29c detects, the reference phase angle PW1S is corrected to the reference phase angle PW1S on which the dust collecting container 20 is mounted and output to the phase angle control means 29d.

FIG. 13 is a basic characteristic diagram showing the correlation between the phase angle of the electric blower of the electric vacuum cleaner according to Embodiment 3 of the present invention and the current value, and illustrates the phase angle difference (correction value) when the dust collecting container is present. FIG. The correction value is the phase angle difference when the dust collecting container is present, and the phase angle difference is obtained in advance by experiments.

  Next, operation | movement of the vacuum cleaner of this Embodiment 3 is demonstrated using FIG.14 and FIG.10. FIG. 14 is a flowchart showing the operation of the third embodiment of the present invention, and FIG. 10 is a flowchart showing the operation of the reference phase angle calculation process.

When the power ON due to the operation of the operation switch 8 is detected (S500), the calculation means 29a of the microcomputer 29 sets the start phase angle PWSS stored in the microcomputer ROM (not shown) in the phase angle control means 29d ( Next, a reference phase angle calculation timer (predetermined time T1) stored in the microcomputer ROM (not shown) is set in the time measuring means (not shown) (S502). The start phase angle PWSS is a phase angle for starting the operation of the electric blower 9 as shown in FIG. 13, and from the point Ia (the state where the phase angle is PWSS and the current value is Ia) when the dust collecting container is attached. When the dust collecting container is not mounted, the process starts from the point Ib (the phase angle is PWSS and the current value is Ib).
The phase angle at the intersection of the target current CTM1 and the characteristic curve of 100% airflow from the electric blower 9 is θWR100 (with) when the dust container is installed, and θWR100 (without) when the dust container is not installed. The time is a time for calculating the phase angle (reference phase angle) at the intersection with the characteristic curve of 100% air volume.

  The phase angle control unit 29d drives the electric blower driving triac 34 based on the initial phase angle PWS set as the start phase angle PWSS, and controls the phase of the voltage applied to the electric blower 9 (S503). At this time, the current detection means 31 detects the current CT based on the phase control flowing through the electric blower 9 (S504), and the calculation means 29a calculates the target current CTM1 corresponding to the set initial phase angle PWS (S505). ). Further, the time measuring means (not shown) starts measuring (incrementing) a predetermined time when the current CT detected by the current detecting means 31 is inputted, as in the first embodiment.

  In addition, the calculation unit 29a determines whether or not the calculation of the reference phase angle PW1S of the electric blower 9 is finished (confirmed) (S506), and when the calculation of the reference phase angle PW1S is finished (S508). If the calculation of the reference phase angle PW1S is not completed, the process of calculating the reference phase angle PW1S is started (S507). In this process, as shown in FIG. 10, it is determined whether or not the predetermined time T1 has passed through time measuring means (not shown) (S116), and when the predetermined time T1 has passed, the process proceeds to S117. When the predetermined time T1 has not elapsed, the process proceeds to (S115), and the calculation time increment is continued.

  While repeating this operation, as shown in FIG. 10, when the measurement time of the time measuring means (not shown) has passed a predetermined time T1, the process proceeds from S116 to S117, and the time measuring means (not shown). ) Is cleared (S117), and the calculation of the reference phase angle PW1S is started. In this case, as shown in FIG. 13, since the target current CTM1 and the detected current CT are considered to be equal, the phase angle detected by the phase angle detecting means 29b is set as the reference phase angle PW1S (S118). The reference phase angle PW1S is “when the dust container 20 is attached”, “when the container has a reference phase angle (with PW1S)”, and when the dust container 20 is not attached, “the container no-time reference phase angle (PW1S)”. No) ”and the process proceeds to S508.

  In S508, using the phase angle (threshold) in which the dust collection container 20 is not mounted, which has been obtained in advance through experiments, the dust collection container detection means determines whether the reference phase angle PW1S detected by the phase angle detection means 29b is greater than or equal to the threshold. It detects from 29c (S508). When the reference phase angle PW1S is detected to be greater than or equal to the threshold value, the phase angle correction unit 29g subtracts the correction value obtained in advance by experiment from the reference phase angle PW1S determined in S507 and updates it to a new reference phase angle PW1S (S513). Then, the process returns to S503 to continue the operation. The dust container detection means 29c detects whether the reference phase angle PW1S detected by the phase angle detection means 29b is equal to or larger than the threshold (S508). If it is determined that the reference phase angle PW1S is less than the threshold, the process proceeds to S509, and the electric blower 9 Keeps spinning. Thereafter, when it is determined that the reference phase angle PW1S is equal to or greater than the threshold value (S508), it is determined that the dust collecting container 20 is not attached, and the phase angle correction unit 29g is corrected in advance by experiments from the reference phase angle PW1S determined in S507. The value is decremented and updated to a new reference phase angle PW1S (S513), and then the process returns to S503 to continue the operation.

  When the phase angle correction means 29g is not provided, when the dust collecting container 20 is not installed, the phase angle is changed from PW1S (none) and the current is IWR100 (none) to the phase angle PW1S (none). Transition to the current value when the air volume is 100% (with dust collecting container). That is, in FIG. 13, the phase angle does not change from the point where the current is IWR100 (no) at the phase angle PW1S (no) and the current value is 100% (with dust collection container). To do. At this point, there is a difference between the target current CTM1 at the phase angle PW1S (none) and the detected current CT of the current detection means 31, so that the calculation means 29a then decreases the phase angle, and the current at the phase angle PW1S (present) The point whose value is IWR100 (present) is calculated and determined.

  On the other hand, when the phase angle correction means 29g is present, when the dust collection container 20 is not installed, the phase angle PW1S (existence) is changed from the state where the phase angle is PW1S (no) and the current is IWR100 (no). ) To the current value when the air volume is 100% (no dust collecting container). That is, in FIG. 13, the point on the characteristic curve when the phase angle PW1S (no) and the current is IWR100 (no) and the phase angle PWS (there is) and the current value is 100% (no dust collecting container). Transition to. At this point, the detection current CT of the current detection means 31 becomes the same as the target current CTM1 at the phase angle PWS (with), so the calculation means 29a immediately has a phase angle of PW1S (with) and a current value of IWR100 (with). Confirm the points.

  As described above, when the phase angle correcting unit 29g is provided, the time for determining the point where the phase angle is PW1S (existing) and the current value is IWR100 (existing) is reduced compared to the case where the phase angle correcting unit 29g is not provided. Is done. Therefore, the time until the target power is controlled from the state where the dust collecting container 20 is not mounted to the mounted state can be shortened. In addition, since the phase angle of the correction value is determined in advance, the phase angle is not increased or decreased in steps only by changing the current value. Thereby, since the power consumption of the electric blower 9 does not fall below the target power (a constant value), there is an effect that the suction force of the electric blower 9 is stabilized. In addition, since the current stabilizes quickly, it can be determined with a stable current value when the amount of dust is determined with the current value of the electric blower 9.

If it is determined in S508 that the reference phase angle PW1S is less than the threshold, the process proceeds to (S509).
The calculating means 29a compares the detected current CT of the current detecting means 31 with the target current CTM1 (S509), and if CT and CTM1 are not equal, the process proceeds to S510, but if CT and CTM1 are equal, the phase is calculated. The phase angle control operation of the electric blower 9 by the angle control means 29d is continued. When it is determined that the detection current CT of the current detection means 31 is not equal to the target current CTM1, the magnitudes of CT and CTM1 are compared (S510). When the detected current CT is larger, the initial phase angle is increased in steps of 0.576 ° (a phase difference corresponding to a delay time of 32 μs when the commercial power supply frequency is 50 Hz) (S512). The control operation is performed (S503). This operation is repeated while CT is larger. On the other hand, every time the phase angle is increased by 0.576 °, the calculation unit 29b calculates the target current CTM1 based on the phase angle. This operation is repeated until the calculated target current CTM1 is equal to the detected current CT each time.

  When it is determined that the target current CTM1 is larger than the detected current CT, the initial phase angle is decreased by 0.576 ° from the phase angle (S511), and the electric blower 9 is controlled with the phase angle. This operation is repeated while the target current CTM1 is larger than the detection current CT. On the other hand, every time the phase angle is reduced by 0.576 °, the calculation unit 29b calculates the target current CTM1 based on the phase angle. This operation is repeated until the calculated target current CTM1 is equal to the detected current CT each time.

  As described above, according to the third embodiment, it is possible to reliably detect the presence / absence of mounting of a dust collecting container for collecting dust by the dust collecting container detecting means. Further, since the mounting of the dust collecting container is detected by the phase angle detection means, a vacuum cleaner with a simple circuit configuration and low cost can be provided. Further, even when the dust collecting container is attached after the dust collecting container is not attached and the reference phase angle PW1S is determined, the reference phase angle can be determined by the phase angle correction means before the dust collecting container is attached. Therefore, erroneous control can be prevented, and the cleaning operation can be smoothly performed when the removed dust collecting container is attached.

  Further, the threshold of the phase angle for judging whether or not the dust collecting container is mounted is set to the phase angle when the dust volume is zero when the dust collecting container is not mounted on the upstream side of the electric blower. Since the phase angle in the target current characteristic is used, it is possible to accurately detect whether the dust container is attached or not.

  Moreover, since the phase angle control means lowers the rotational speed of the electric blower or stops the rotation of the electric blower based on the detection result of the dust collecting container detection means, a convenient vacuum cleaner can be obtained.

  The display control means includes a display unit and a display control unit for controlling the display unit. Based on the detection result of the dust collection container detection unit, the display control unit determines whether the dust collection container is mounted on the upstream side of the electric blower. Is displayed so that the user can easily check the mounting state of the dust collecting container and obtain an easy-to-use vacuum cleaner.

  Needless to say, Embodiments 1 to 3 may be implemented singly or in appropriate combinations.

1 suction tool, 2 extension pipe, 3 hand hose, 4 hose, 5 vacuum cleaner body,
6 wheels, 7 power cord, 8 operation switch, 9 electric blower, 10 body case,
11 Lower case, 12 Upper case, 13 Hose connection port, 14 Body pipe,
15 Dust collection container connection port, 16 exhaust hole, 17 body inlet, 18 dust collection container fixing hole,
19 Electric motor, 20 Dust collection container, 21 Dust collection container inlet, 22 Dust collection container outlet,
23 Dust collection container fixing part, 24 Commercial power supply, 25 15A fuse, 264A fuse,
27 DC 12V power supply, 28 constant voltage power supply,
29 microcomputer (control means), 29a calculation means, 29b phase angle detection means 29c dust collection container detection means, 29d phase angle control means, 29e operation detection means 29f display control means, 29g phase angle correction means, 31 current detection means,
31a current sensor, 32 display unit, 34 electric blower drive triac,
35 Triac for motor drive,
36 Safety switch, 41 Primary filter, 42 Secondary filter,
51 connection pipe, 52 grip part, 53 lid part, 54 hose cover, 100 vacuum cleaner.

Claims (7)

An electric blower that generates suction air;
A dust collecting container that is detachably attached to the upstream side of the electric blower and collects dust;
Current detecting means for detecting a current flowing through the electric blower;
Phase angle control means for controlling the input current of the electric blower by controlling the phase angle of the voltage applied to the electric blower;
Arithmetic means for increasing or decreasing the phase angle so that a detection current detected by the current detection means approaches a predetermined target current;
An operation switch for turning on and off the electric blower;
Phase angle detection means for detecting a phase angle increased or decreased by the calculation means after a predetermined time has elapsed since the operation switch was turned on;
Dust collection container detection means for detecting whether or not the dust collection container is mounted on the upstream side of the electric blower based on the phase angle detected by the phase angle detection means and a preset threshold. Electric vacuum cleaner. After the predetermined time elapses, the phase angle detection means repeatedly continues to detect the phase angle increased or decreased by the calculation means, and the dust container detection means is based on the detection result of the phase angle detection means. 2. The electric vacuum cleaner according to claim 1, wherein detection of whether or not a dust collecting container is mounted on an upstream side of the electric blower is repeatedly continued. The threshold value is a first phase angle in the phase angle-target current characteristic when the dust volume is 100% when the dust volume is zero when the dust collecting container is not mounted on the upstream side of the electric blower. The electric vacuum cleaner according to claim 1 or 2, wherein the electric vacuum cleaner is characterized. A phase that corrects the phase angle detected by the phase angle detection means to the first phase angle when the dust collection container detection means detects that the dust collection container is not mounted on the upstream side of the electric blower. The electric vacuum cleaner according to claim 3, further comprising angle correction means. 5. The phase angle control unit according to claim 1, wherein the phase angle control unit lowers the rotation speed of the electric blower or stops the rotation of the electric blower based on a detection result of the dust collecting container detection unit. A vacuum cleaner according to claim 1. A suction tool,
An electric motor that drives a rotating brush that is provided in the suction tool and scrapes up dust on the surface to be cleaned;
The said phase angle control means reduces the rotational speed of the said motor based on the detection result of a dust container detection means, or stops the rotation of the said air blower. The vacuum cleaner as described in. A display unit;
Display control means for controlling the display unit,
The display control means displays whether or not the dust collection container is mounted on the upstream side of the electric blower based on the detection result of the dust collection container detection means. The electric vacuum cleaner as described in any one of 6.

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