JP2015039464A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight vacuum cleaner capable of securing a sufficient dust removing property in both AC power and DC power.SOLUTION: A lightweight vacuum cleaner includes: an electric blower 3 stored in a body and generating suction air; a suction implement 32 used in a state that the suction implement 32 contacts with a cleaned face, for sucking dust from the cleaned face; a dust scraping-up rotary brush 33 provided in the suction implement 32; an electric motor 26 capable of rotationally driving the rotary brush 33 by any of AC power supplied from a commercial power supply 1 and DC power supplied from a secondary battery 2; and signal control means 5 for supplying power of a first half portion and a latter half portion of a phase except the vicinity of a maximum amplitude of AC voltage supplied from the commercial power supply 1 to the electric motor 26 to nearly equalize the AC power with a value of the DC power. Thereby, the lightweight vacuum cleaner can secure sufficient dust removing performance in both the AC power and the DC power.

Description

  The present invention relates to a vacuum cleaner that can be used with both AC power and DC power.

  As this type of conventional vacuum cleaner, there is an AC / DC vacuum cleaner that can be used both in an AC type operated by a commercial power source and a rechargeable type operated by a charged secondary battery. This vacuum cleaner includes an electric blower that can drive both AC power supplied from a commercial power source and DC power supplied from a secondary battery.

  However, in this vacuum cleaner, since the input of AC power from the commercial power supply to the electric blower is larger than the input of DC power from the secondary battery to the electric blower, the electric blower is driven by the DC power from the secondary battery. When the electric blower is operated, the suction force by the electric blower is extremely low as compared with the case where the electric blower is driven by the AC power from the commercial power source.

  An AC control circuit for making the AC power from the commercial power source substantially equal to the DC power from the secondary battery in order to make the attraction force when driven by this AC power and when driven by DC power substantially equal. This AC control circuit is disclosed in which AC power is supplied to the motor after phase control as shown in FIG. 4 by a triac element, or in which the phase is controlled and then smoothed by a smoothing circuit and supplied to the motor. (For example, refer to Patent Document 1).

JP 2003-339600 A

  However, when AC power from a commercial power source is phase-controlled by a TRIAC element and supplied to the motor, an attempt is made to obtain the same motor output as the DC power from the secondary battery, and the vicinity of the maximum amplitude value of the AC voltage as shown in FIG. When energized at, the current to the motor rises steeply, so that the power factor of the motor is bad and the heat generation becomes large, and it is necessary to make it larger than when the motor is driven by DC.

  Also, when the commercial power supply is phase-controlled and then smoothed by a smoothing circuit and the motor is driven, the power factor of the motor is the same as that driven by DC power from the secondary battery, but the smoothing circuit becomes larger and the electric power It is not easy to reduce the size and weight of the vacuum cleaner. In particular, an electric blower of an AC type vacuum cleaner has a mainstream of about 1000 W, and it is not particularly easy to reduce the size and weight of an electric motor with a large input in order to obtain the same output.

  By the way, it is not only the suction force of the electric blower that affects the dust removal performance of the electric vacuum cleaner, but also the scraping performance of the suction tool. If the dust can be lifted from the floor surface by the suction tool, the dust can be sucked even if the suction force of the electric blower is weak.

There is a method of driving the rotary brush with an electric motor in order to improve the scraping performance of the suction tool, but this electric motor for driving the rotary brush also has the DC power from the secondary battery made substantially equal by phase control of the AC power. Similarly, the power factor of the motor is poor, the heat generation increases, and the motor must be made larger than the DC rating. Similarly, when the electric motor is driven by smoothing with a smoothing circuit, the smoothing circuit becomes large, and it is not easy to reduce the size and weight of the vacuum cleaner.

  This invention solves the said conventional subject, and it aims at providing the lightweight vacuum cleaner which can ensure sufficient dust-removal property by both AC power and DC power.

In order to solve the above-described conventional problems, the vacuum cleaner of the present invention is housed in the main body and is used in contact with the surface to be cleaned and the electric blower that generates suction air, and sucks dust from the surface to be cleaned. Suction tool, a dust brush rotating rotary brush provided on the suction tool, and an electric motor capable of rotating the rotary brush with either AC power supplied from a commercial power source or DC power supplied from a secondary battery And control means for supplying the electric power of the first half part and the second half part of the phase excluding the vicinity of the maximum amplitude of the AC voltage supplied from the commercial power supply to the electric motor so as to be substantially equal to the value of the DC power of the secondary battery. It was made to comprise.

  As a result, it is possible to provide a lightweight vacuum cleaner that can ensure sufficient dust removal with both AC power and DC power.

  In the vacuum cleaner of the present invention, the AC power from the commercial power source is made substantially equal to the value of the DC power from the secondary battery by the control means to drive the rotary brush driving motor of the suction tool. Since the rotation speed of the rotating brush can be made substantially equal when the electric motor is driven by the secondary battery, it is possible to provide a lightweight vacuum cleaner that can sufficiently secure dust removal with both AC power and DC power.

Schematic of the vacuum cleaner in Embodiment 1 of the present invention The control block diagram of the vacuum cleaner Explanatory drawing of the alternating current power supplied to the rotary brush drive motor of the vacuum cleaner Explanatory drawing of phase control of conventional vacuum cleaner

  1st invention is accommodated in the main body, the electric blower which generate | occur | produces a suction | inhalation wind, it is used in contact with a to-be-cleaned surface, the suction tool for sucking in dust from a to-be-cleaned surface, and the said suction tool was provided. A rotating brush for dust cleaning, an electric motor capable of rotating the rotating brush with either AC power supplied from a commercial power source or DC power supplied from a secondary battery, and an AC voltage supplied from the commercial power source. By supplying the electric power of the first half and the latter half of the phase, excluding the vicinity of the maximum amplitude, to the electric motor, by providing a control unit that is substantially equal to the value of the DC power of the secondary battery, both AC power and DC power are provided. Therefore, it is possible to provide a lightweight vacuum cleaner that can ensure sufficient dust removal performance.

  According to a second aspect of the present invention, the power of the first half and the latter half of the phase, excluding the vicinity of the maximum amplitude of the AC voltage supplied from the commercial power supply, is supplied so as to be substantially equal to the value of the DC power of the secondary battery. The first half of the phase is supplied from the substantially zero point of the AC voltage, and the latter half of the phase is supplied up to the substantially zero point of the AC voltage, so that the efficiency of the motor is improved and both the AC power and the DC power are supplied. It is possible to provide a lighter vacuum cleaner that can ensure sufficient dust removal performance.

The third aspect of the invention improves the efficiency of the motor by supplying substantially equal power in the first half and the second half of the phase excluding the vicinity of the maximum amplitude of the AC voltage supplied from the commercial power supply, thereby improving AC power and DC. It is possible to provide a lighter vacuum cleaner that can ensure sufficient dust removal performance with both electric power.

  According to a fourth aspect of the present invention, the AC power value to be supplied is changed in accordance with the voltage value of the commercial power source, and is made substantially equal to the DC power value of the secondary battery, so that a large load is applied to the motor when the AC voltage is high. When the voltage is low, the usability can be further improved by making the direct current power substantially equal to that of the secondary battery.

  According to the fifth aspect of the present invention, by changing the DC power value to be supplied according to the voltage value of the secondary battery and making it substantially equal to the AC power value of the commercial power, the capacity of the secondary battery is reduced and the battery voltage is lowered. When it becomes, it can be made substantially equal to the alternating current power from a commercial power supply, and the rotation speed of the rotary brush of a suction tool can be made substantially equal to both alternating current power and direct current power, and usability can be improved more.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
The vacuum cleaner in Embodiment 1 of this invention is demonstrated using FIGS.

  FIG. 1 is an overall view of the electric vacuum cleaner according to the first embodiment. Reference numeral 28 denotes a vacuum cleaner main body, and reference numeral 3 denotes an electric blower that generates suction air built in the vacuum cleaner main body 28. The electric blower 3 is driven by supply of either AC power or DC power. The suction air of the electric blower 3 is transmitted to the suction tool 32 through the hose 29 and the extension pipe 31, and the dust on the floor is sucked from the suction port of the suction tool 32. The suction tool 32 is provided with a rotary brush 33 for dust lifting and an electric motor 26 that rotationally drives the rotary brush 33. The electric motor 26 is driven by supplying either AC power or DC power.

  The vacuum cleaner main body 28 and the hose 29, the hose 29 and the extension pipe 31, the extension pipe 31 and the suction tool 32 are detachable, and the hose 29 and the extension pipe 31 connecting portion are removed from the hose 29 side by removing the extension pipe 31. About the extension pipe 31 and the suction tool 32 connection part, the suction tool 32 can be removed and dust can be attracted | sucked from the extension pipe 31 side.

  Further, the connection portion with the extension pipe 31 is provided with a handle portion 30 for the user to hold, and the handle portion 30 is provided with an operation portion 25 for instructing the operation and stop of the electric blower 3 and the electric motor 26. In addition, a power cord 23 is provided at the rear of the cleaner body 28 to connect to an outlet (commercial power source) and supply power to a circuit board 34 (not shown) built in the cleaner body 28. Yes.

  Further, a secondary battery 2 (not shown) as a secondary battery is detachably accommodated beside the electric blower 3 in the cleaner body 28. Electric power is supplied from the secondary battery 2 to the circuit board 34 to drive the electric blower 3 and the electric motor 26. Further, the lower part of the secondary battery 2 of the vacuum cleaner main body 28 is detachably connected to an external power source (not shown), and the secondary battery 2 is supplied with electric power supplied from the external power source. A charging terminal (not shown) for charging the battery 2 is attached.

  Next, the configuration of the control circuit will be described with reference to FIG. Each circuit block 34a, 34b, 34c on the circuit diagram is arranged in the cleaner body 28, the hose 29, and the suction tool 32, respectively. The commercial power supply 1 includes a zero-cross detection circuit 4 for detecting a zero-cross of the power supply waveform, a power supply voltage detection circuit 24 for detecting the power supply voltage of the commercial power supply 1, and a power supply circuit 27 that supplies power to the signal control means 5. The electric blower 3 and the electric motor 26 are connected.

  The secondary battery 2 has a positive terminal connected to one side of the commercial power supply 1, and, similarly to the commercial power supply 1, the zero cross detection circuit 4, the power supply voltage detection circuit 24, the power supply circuit 27, the electric blower 3, and the electric motor 26 are connected. Yes. When the zero-cross circuit is connected to the secondary battery 2, a zero-cross signal is not output, so that it can be determined that the zero-cross circuit is connected to the secondary battery 2. The power supply voltage detection circuit 24 detects the secondary battery 2 voltage and inputs it to the signal control means 5.

  The switching means A6 and switching means B7 are AC / DC switching means for switching the AC power supplied from the commercial power source 1 and the DC power supplied from the secondary battery 2 to the electric blower 3 as necessary.

  Switching is performed by the signal control means 5 via the switching means driving circuit A10 and the switching means driving circuit B11, respectively. Similarly, the switching means C8 and the switching means D9 are AC / DC switching means of the electric motor 26, and are configured to be switched by the signal control means 5 via the switching means driving circuit C12 and the switching means driving circuit D13.

  The electric blower 3 is configured to be driven by the triac 14 at the time of alternating current and by the MOSFET A15 at the time of direct current, and is controlled by the signal control means 5 through the drive circuit A19 and the drive circuit B20, respectively. The motor 26 is driven by MOSFETC17 and MOSFETD18 during alternating current, and MOSFETB16 during direct current, and is controlled by the signal control means 5 via a drive circuit C21 and drive circuit D22, respectively.

  The MOSFET C17 and MOSFET D18 can be connected to their respective source terminals to turn on and off the commercial power supply by the drive circuit C21. As shown in FIG. 3, the first half of the phase excluding the vicinity of the maximum point of the AC voltage amplitude Both the voltage of the second half and the latter half are applied to the electric motor 26 and controlled. Compared with control by phase control, it is turned on at a low AC voltage, so that the power factor of the motor can be improved compared to phase control, and the motor efficiency can be improved by about 30%.

  The electric blower 3 and the electric motor 26 have their input control values determined by input signals from the operation buttons of the operation unit 25 connected to the signal control means 5. The TRIAC 14 controls the input of the MOSFET C17 and the MOSFET D18 with the voltage widths of the first half and the second half of the phase excluding the maximum amplitude of the AC voltage by phase control. The zero cross detection circuit 4 required for each control is connected to the signal control means 5. MOSFETA15 and MOSFETB16 control input by PWM control. The power supply voltage detection circuit 24 is a circuit that detects a power supply voltage for correcting the input of the electric motor 26 based on the voltage of the commercial power supply 1 or the secondary battery 2, and is connected to the signal control means 5.

  Next, the operation and action of the electric vacuum cleaner configured as above will be described.

  First, in the case of DC operation, since the zero cross signal is not output from the zero cross detection circuit 4, the signal control means 5 recognizes that AC power is not supplied, turns on the switching means B7 and the switching means D9, and turns on the switching means A6. The switching means C8 is turned off to switch to the DC side. Next, MOSFETA15 and MOSFETB16 are controlled by the signal control means 5, and when MOSFETA15 and MOSFETB16 are turned on, DC power is supplied to the electric blower 3 and the electric motor 26, and each is driven.

Next, in the case of AC operation, since the zero cross signal is output from the zero cross detection circuit 4, the signal control means 5 recognizes that AC power is being supplied, turns off the switching means B7 and the switching means D9, and switches the switching means. By switching on A6 and switching means C8, switching to the AC side is performed. Next, the triac 14, the MOSFET C17, and the MOSFET D18 are controlled by the signal control means 5, and each is turned on to supply AC power to the electric blower 3 and the electric motor 26, thereby driving each.

  MOSFETC17 and MOSFETD18 supply AC power to the motor 26 by turning on both the first half and the second half of the phase except the maximum amplitude point with the zero cross point from the zero cross detection circuit 4 as a reference. At this time, the position where the first half of the phase is turned off and the position where the second half is turned on are adjusted so that the AC power supplied to the electric motor 26 can be made equal to the value of the DC power supplied from the secondary battery 2.

  For this reason, since the rotation of the motor 26 can be made equal when driving the motor 26 with DC power supplied from the secondary battery 2 and when driving the motor 26 with AC power from a commercial power source, the AC power In addition, it is possible to sufficiently secure dust removal with both DC power and DC power.

  In addition, since the first half and the second half of the phase excluding the vicinity of the maximum point of the AC voltage amplitude are supplied directly to the motor, the power factor of the motor is better than when supplying power equal to DC power by phase control. The size can be the same as that of a DC rated motor. Further, since the configuration of the control circuit can be simplified compared to the case where the electric power smoothed by the smoothing circuit is supplied to the electric motor after the phase control, the AC circuit can be made smaller and lighter.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. Note that parts having the same configurations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The difference from the first embodiment is that the AC power supplied to the motor 26 is based on the zero cross point from the zero cross detection circuit 4 and excluding the vicinity of the maximum amplitude of the AC voltage, and the first half of the phase is substantially zero point of the AC voltage. The second half of the phase is to supply power up to approximately the zero point of the AC voltage.

  By setting it as the above structures, it becomes possible to provide the lighter vacuum cleaner which can improve the efficiency of the electric motor 26 and can ensure sufficient dust-removing property with both AC power and DC power.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIGS. Note that parts having the same configurations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The difference from the first embodiment is that the AC power supplied to the electric motor 26 is supplied by making the power in the first half of the phase and the latter half of the phase substantially equal, excluding the vicinity of the maximum amplitude of the AC voltage.

  By setting it as the above structures, it becomes possible to provide the lighter vacuum cleaner which can improve the efficiency of the electric motor 26 and can ensure sufficient dust-removing property with both AC power and DC power.

(Embodiment 4)
A fourth embodiment of the present invention will be described with reference to FIG. The voltage value of the commercial power source 1 is detected by the power source voltage detection circuit 24, and the AC power supplied to the electric motor 26 is changed to be substantially equal to the DC power from the secondary battery 2 based on the voltage value and supplied to the electric motor 26. To do.

By adopting the above configuration, a large load is not applied to the motor 26 when the AC voltage is high, and when the voltage is low, the suction tool 32 is made substantially equal to the DC power from the secondary battery 2. The rotational speed of the rotary brush can be made substantially equal for both AC power and DC power, and usability can be improved.

(Embodiment 5)
A fifth embodiment of the present invention will be described. The voltage value of the secondary battery 2 is detected by the power supply voltage detection circuit 24, and the DC power supplied to the electric motor 26 is changed to be substantially equal to the AC power from the commercial power supply based on the voltage value and supplied to the electric motor 26. To do.

  With the above configuration, even when the capacity of the secondary battery 2 is reduced and the battery voltage is lowered, the rotational speed of the rotary brush of the suction tool 32 is changed to AC power by making it approximately equal to AC power from the commercial power source. And DC power can be made substantially equal, and usability can be improved.

  As described above, in the vacuum cleaner according to the present description, the vacuum cleaner drives the rotary brush of the suction tool by making the AC power from the commercial power source substantially equal to the value of the DC power from the secondary battery by the control means. Because the motor is driven by a commercial power source and a secondary battery, the rotational speed of the rotating brush can be made approximately equal when driving the motor with a commercial power source and a secondary battery. Since it becomes possible to provide an electric vacuum cleaner, it can be used for general AC / DC vacuum cleaners for both home and business use.

DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Secondary battery 3 Electric blower 4 Zero cross detection circuit 5 Signal control means 6 Switching means A
7 Switching means B
8 Switching means C
9 Switching means D
10 Switching means drive circuit A
11 Switching means drive circuit B
12 Switching means drive circuit C
13 Switching means drive circuit D
14 Triac 15 MOSFETA
16 MOSFETB
17 MOSFETC
18 MOSFET 18
19 Drive circuit A
20 Drive circuit B
21 Drive circuit C
22 Drive circuit D
DESCRIPTION OF SYMBOLS 23 Power cord 24 Power supply voltage detection circuit 25 Operation part 26 Electric motor 27 Power supply circuit 28 Vacuum cleaner main body 29 Hose 30 Handle part 31 Extension pipe 32 Suction tool 33 Rotating brush

Claims (5)

An electric blower housed in the main body and generating suction air;
A suction tool that is used in contact with the surface to be cleaned and sucks dust from the surface to be cleaned;
A rotating brush for dust cleaning provided in the suction tool;
An electric motor capable of rotationally driving the rotating brush with either AC power supplied from a commercial power source or DC power supplied from a secondary battery;
Control means for supplying the electric power of the first half and the latter half of the phase to the electric motor except for the vicinity of the maximum amplitude of the AC voltage supplied from the commercial power supply, and substantially equal to the value of the DC power of the secondary battery, A vacuum cleaner characterized by comprising: The control means for making the power of the first half of the phase and the latter half of the phase excluding the vicinity of the maximum amplitude of the AC voltage supplied from the commercial power supply substantially equal to the value of the DC power of the secondary battery,
The vacuum cleaner according to claim 1, wherein the first half of the phase is supplied from a substantially zero point of the AC voltage, and the second half is supplied up to a substantially zero point of the AC voltage. The electric vacuum cleaner according to claim 1 or 2, wherein the electric power of the first half part and the latter half part of the phase except for the vicinity of the maximum amplitude of the AC voltage supplied from the commercial power supply is supplied substantially equal. The electric cleaning according to any one of claims 1 to 3, wherein the AC power value to be supplied is changed in accordance with the voltage value of the commercial power source so as to be substantially equal to the DC power value of the secondary battery. Machine. The electric cleaning according to any one of claims 1 to 4, wherein a DC power value to be supplied is changed in accordance with a voltage value of the secondary battery so as to be substantially equal to a value of AC power of commercial power. Machine.

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