JP6446664B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to an AC / DC vacuum cleaner that operates on both a commercial power source and a secondary battery.

  Conventionally, a vacuum cleaner that is operated by selectively switching between an AC power source and a DC power source (secondary battery) has been disclosed (see, for example, Patent Document 1).

  The AC / DC dual-purpose vacuum cleaner described in Patent Document 1 selectively switches between an AC power source and a DC power source (secondary battery) depending on the presence / absence of an AC frequency signal (hereinafter referred to as “Hz signal”). Then, power is supplied to a control circuit power supply circuit that controls the control circuit.

JP 2001-321307 A

  However, the configuration of the conventional vacuum cleaner described in Patent Document 1 supplies power to the control circuit power supply circuit with a secondary battery when it is detected that the Hz signal has disappeared. In this case, power is supplied to the control circuit power supply circuit even when the vacuum cleaner is not in operation (including when the vacuum cleaner is housed). Therefore, the power of the secondary battery is always consumed, and the battery capacity of the secondary battery is reduced.

  Accordingly, when a user who has not used the vacuum cleaner with the secondary battery for a certain period of time operates the vacuum cleaner with the secondary battery, there is a problem that the operation time is shortened. Furthermore, when stored for a long period of time, the secondary battery is overdischarged. As a result, the life of the secondary battery may be reduced.

  An object of this invention is to provide the vacuum cleaner which can prevent the capacity | capacitance fall and performance deterioration of a secondary battery.

In order to solve the above-described conventional problems, a vacuum cleaner of the present invention includes a vacuum cleaner body, a handle portion, and an operation input receiving portion that is provided in the handle portion and inputs a driving operation. Inside, at least an electric blower, a power cord connectable to an AC power source, a secondary battery, a Hz signal detection unit for detecting whether the power cord is connected to the AC power source, a control of the electric blower and a Hz signal detection unit A signal control unit that performs detection according to the above, a power supply circuit for the signal control unit, a trigger circuit power source that is supplied with power from the secondary battery, and a trigger circuit that uses the trigger circuit power source as a power source. A part of the power supply path from the power cord to the power circuit and the supply path from the secondary battery to the power circuit is shared, and the semiconductor switching element is used as an opening / closing part of the power supply path from the secondary battery to the power circuit. Provide. Then, when the power supply from the AC power supply is cut off, the semiconductor switching element is turned on by the main power supply activation signal for power supply trigger circuit according to an operation input from the operation input reception unit from the power supply and to belt Riga circuit When the power supply circuit is activated and the signal control unit starts operation and there is no operation input, the power supply from the secondary battery is supplied only to the trigger circuit power supply.

According to this configuration, when the power supply is switched from the AC power supply to the secondary battery, power is not supplied to the power supply circuit while there is no main power activation signal from the trigger circuit by the operation input. Thus, power is supplied only to the power supply for the trigger circuit that consumes very little power when no load is applied. As a result, a reduction in battery capacity of the secondary battery can be reduced. In addition, overdischarge of the secondary battery due to long-term storage can be suppressed. As a result, a highly reliable vacuum cleaner can be realized.

The vacuum cleaner of the present invention can prevent the capacity reduction and performance deterioration of the secondary battery.

FIG. 1 is a perspective view showing an external appearance of a vacuum cleaner according to an embodiment of the present invention. FIG. 2 is a circuit diagram of the electric vacuum cleaner according to the embodiment.

  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)
Below, the vacuum cleaner of embodiment of this invention is demonstrated using FIG.

  FIG. 1 is a perspective view showing an external appearance of a vacuum cleaner according to an embodiment of the present invention. As shown in FIG. 1, the vacuum cleaner of the present embodiment includes at least a vacuum cleaner main body 1 incorporating an electric blower, a power cord 2, a hose 3, a hand handle 4, and a hand operation unit 5 (hand switch). Part), an extension pipe 6, a floor surface suction tool 7, and the like. The power cord 2 supplies an AC power source such as a commercial power source to the cleaner body 1. The hose 3 is connected to the cleaner body 1. The hand handle 4 communicates with and is connected to the hose 3. The hand operation unit 5 is provided on the hand handle 4. The extension pipe 6 communicates with and is connected to the hand handle 4. The floor suction tool 7 is communicated with and connected to the extension pipe 6.

  Further, the vacuum cleaner body 1 has a built-in or externally attached DC power source composed of a storage battery such as a secondary battery.

  Below, operation | movement of the vacuum cleaner of this Embodiment is demonstrated.

  First, it is determined whether the electric blower is driven by an AC power source or a DC power source based on the presence or absence of an AC frequency signal.

  Next, based on the determination result, the electric blower is rotated by an AC power source or a DC power source by operating the operation instruction switch of the hand operation unit 5. Thereby, dust is sucked from the floor surface suction tool 7 together with the air flow from the cleaning surface such as the floor surface. Then, the dust sucked from the floor suction tool 7 is guided to the dust collecting chamber in the cleaner body 1 via the extension pipe 6, the hand handle 4 and the hose 3 to collect the dust.

  As described above, the vacuum cleaner of the present embodiment is configured and operates.

  Below, control of the vacuum cleaner of this Embodiment is demonstrated using FIG.

  FIG. 2 is a circuit diagram of the vacuum cleaner according to the embodiment. FIG. 2 mainly shows the power supply control system of the vacuum cleaner of the present embodiment.

As shown in FIG. 2, the power supply control system of the vacuum cleaner includes an alternating current power supply 11 (commercial power supply), a secondary battery 12 constituting a direct current power supply, an operation input receiving portion 18, and a microcomputer 19 constituting a signal control portion ( (Hereinafter referred to as “microcomputer”), the power supply circuit 13 constituting the main power supply, the Hz signal detector 14, the main power supply starting circuit 15, the power supply 16 for the trigger circuit, the trigger circuit 17, and the like. The operation input reception unit 18 receives an input signal from the hand operation unit 5. The microcomputer 19 controls the entire system. The power supply circuit 13 supplies power to the microcomputer 19 and the like. The Hz signal detection unit 14 detects the presence or absence of an AC frequency signal (Hz signal). The main power supply activation circuit 15 is connected in series with the power supply circuit 13 and turns on / off the supply of power from the secondary battery to the power supply circuit 13. Specifically, the main power supply start circuit 15 realizes the above operation by turning on / off the semiconductor switching element 20 by a main power supply start signal described later.

  The trigger circuit power supply 16 is supplied with power by the secondary battery 12 and is responsible for supplying a power supply for a main power activation signal, which will be described later. Specifically, the trigger circuit power supply 16 is configured by a power supply circuit having a leakage current of 2 μA or less (when the battery voltage of the secondary battery 12 is 50.4 V) in order to extremely reduce the power consumption of the battery at no load. Has been. In the present embodiment, the trigger circuit power supply 16 outputs −20 V to the power supply line A.

  The trigger circuit 17 generates a trigger signal for turning on the semiconductor switching element 20 of the main power supply starting circuit 15 using the trigger circuit power supply 16 as a power supply.

  Next, the operation of the power supply control system of the vacuum cleaner configured as described above will be described.

  First, when the power cord 2 is disconnected, the semiconductor switching element 20 of the main power start circuit 15 is turned off. At this time, the power is supplied from the secondary battery 12 only to the trigger circuit power supply 16 in which the power consumption of the secondary battery at no load is extremely small. Therefore, the microcomputer 19 constituting the signal control unit is not operating.

  The trigger circuit power supply 16 generates a voltage determined by the Zener voltage of the Zener diode 32 and a threshold voltage (threshold voltage) of the FET 35 (Field Effect Transistor) between both electrodes of the output smoothing capacitor 34. Output. The output smoothing capacitor 34 is composed of, for example, an electrolytic capacitor or a ceramic capacitor, and smoothes the voltage fluctuation. At this time, it is more preferable that the output smoothing capacitor 34 is made of a ceramic capacitor because leakage current is reduced. As a result, when the voltage becomes lower than the Zener voltage, the operation of the trigger circuit power supply 16 is stopped. As a result, the reduction in the battery capacity of the secondary battery can be further reduced, and the time until overdischarge can be further extended.

  At this time, the resistor 33 of the trigger circuit power supply 16 is provided with a high resistance of about 1 MΩ, for example, and limits the current flowing through the Zener diode 32. Thereby, the electric current at the time of no load is made as small as possible, and the power consumption of the secondary battery 12 is suppressed.

  In addition, the trigger circuit power supply 16 includes a limiting resistor 31 and a diode 30. The limiting resistor 31 limits the load current. The diode 30 prevents current from flowing from the AC power supply 11 through the secondary battery 12 when the power cord 2 is connected to a commercial power supply.

  At this time, when any of the switches 52, 53, 54, 55 of the operation input receiving unit 18 is turned on, the base 41 of the diode 41, the resistor 42, and the transistor 43 of the trigger circuit 17 from the power line A through the operation input receiving unit 18 A current flows between the emitters. As a result, the collector-emitter of the transistor 43 is turned on. Then, a main power start signal for starting the main power start circuit 15 flows. At this time, the power supply circuit 13 is not activated. Therefore, no current flows from the trigger circuit 17 to the resistor 51 via the diode 50.

  As a result, the current of the main power supply start signal flows from the power supply line A through the base and emitter of the transistor 21 of the main power supply start circuit 15, the resistor 25, and the collector and emitter of the transistor 43 of the trigger circuit 17. Furthermore, a current flows between the emitter 22 and the collector of the transistor 21 of the main power supply starting circuit 15, the resistor 22 and the resistor 23. As a result, the semiconductor switching element 20 of the main power supply starting circuit 15 is turned on.

  When the semiconductor switching element 20 is turned on, power is supplied to the power supply circuit 13 that is the main power supply. As a result, the power supply circuit 13 is activated and the microcomputer 19 is activated.

  Next, when the microcomputer 19 is activated, the microcomputer 19 determines whether or not an AC frequency signal is input by the Hz signal detection unit 14. At this time, if there is no input of the AC frequency signal, the microcomputer determines that the power is activated by the secondary battery 12. Then, the microcomputer 19 turns on the transistor 40 of the trigger circuit 17, and continuously causes a current to flow from the power supply line A between the resistor 42 of the trigger circuit 17 and the base-emitter of the transistor 43. Thereby, the power supply from the secondary battery 12 to the power supply circuit 13 is maintained. At the same time, when the cathode side of the diode 41 becomes the same voltage as the power supply line A, a predetermined voltage is taken into the microcomputer 19. Then, the vacuum cleaner operates in accordance with the voltage corresponding to the input signal taken into the microcomputer 19. Here, the predetermined voltage is a voltage obtained by subtracting the forward voltage of the diode 50 from the output voltage of the power supply circuit 13, resistors 45, 46, 47 formed by the switches that are turned on in the operation input receiving unit 18. 48 is a voltage divided by the combined resistor 48 and the resistor 51.

  Note that the above-described series of control from when the switch of the operation input receiving unit 18 is turned on to when the input signal is read must be performed during a period when the person is pressing the switch (for example, within 150 ms).

  Next, when stopping the operation of the vacuum cleaner, first, the operation is stopped by the operation stop signal from the operation input receiving unit 18. Thereafter, the transistor 40 of the trigger circuit 17 is turned off, and the semiconductor switching element 20 of the main power supply starting circuit 15 is turned off. As a result, power is again supplied from the secondary battery 12 only to the trigger circuit power supply 16. As a result, the power consumption of the secondary battery 12 at the time of no load can be suppressed extremely small.

  Next, the operation when the power cord 2 is connected will be described below.

  First, power is supplied from the AC power supply 11 to the power supply circuit 13 that is the main power supply. As a result, the power supply circuit 13 and the microcomputer 19 are activated.

  Next, the microcomputer 19 determines whether or not an AC frequency signal is input by the Hz signal detection unit 14. In the above case, since there is an input of an AC frequency signal, the microcomputer 19 determines that the power supply is activated by the AC power supply 11. Then, the microcomputer 19 turns on the transistor 26 of the main power supply activation circuit 15 and turns on the transistor 40 of the trigger circuit 17.

  At this time, the transistor 40 of the trigger circuit 17 is turned on, and a current flows from the power line A between the resistor 42 of the trigger circuit 17 and the base-emitter of the transistor 43. However, the transistor 26 of the main power supply starting circuit 15 is on. For this reason, the base-emitter of the transistor 21 has the same potential. Thereby, the transistor 21 is not turned on, and the semiconductor switching element 20 is turned off.

As described above, the electric vacuum cleaner of the present invention includes a vacuum cleaner body, a handle portion, and an operation input receiving portion that is provided in the handle portion and inputs a driving operation. In the vacuum cleaner main body, at least an electric blower, a power cord connectable to an AC power source, a secondary battery, an Hz signal detection unit for detecting whether the power cord is connected to an AC power source, control of the electric blower and Hz A signal control unit that performs detection by the signal detection unit, a power supply circuit for the signal control unit, a trigger circuit power source that is supplied with power from a secondary battery, and a trigger circuit that uses the trigger power source as a power source. A part of the power supply path from the power cord to the power circuit and the supply path from the secondary battery to the power circuit is shared, and the semiconductor switching element is used as an opening / closing part of the power supply path from the secondary battery to the power circuit. Provide. And when the power supply from the AC power supply is cut off, the semiconductor switching element is turned on by the main power start signal from the trigger circuit by the operation input with the power supply for the trigger circuit from the operation input receiving unit as the power source, When the main power source is activated and the signal control unit starts operation, and there is no operation input, a configuration may be provided in which power is supplied from the secondary battery only to the trigger circuit power source.

  According to this configuration, when the power source is switched from the AC power source to the secondary battery, power is not supplied to the power source circuit while there is no main power activation signal from the trigger circuit. Thus, when no load is applied, power is supplied only to the power supply for the trigger circuit that consumes very little power. As a result, a reduction in battery capacity of the secondary battery can be reduced. In addition, overdischarge of the secondary battery due to long-term storage can be suppressed. As a result, a highly reliable vacuum cleaner can be realized.

  Moreover, the vacuum cleaner of this invention may comprise the output smoothing capacitor of the power supply for trigger circuits with a ceramic capacitor. Thereby, the leakage current of the trigger circuit power supply can be reduced. As a result, the reduction in the battery capacity of the secondary battery can be further reduced.

  Moreover, the vacuum cleaner of this invention may connect a Zener diode to the power supply for trigger circuits so that it may be connected in series with a secondary battery. As a result, when the battery voltage of the secondary battery is low, the trigger circuit power supply can be prevented from starting. Therefore, when the battery voltage of the secondary battery becomes equal to or lower than the Zener voltage of the Zener diode, the operation of the trigger circuit power supply is stopped. As a result, the battery capacity of the secondary battery can be further reduced, and the time can be further extended before overdischarge.

  The present invention can be applied to various types of vacuum cleaners such as home use, business use and built-in type (central cleaner) driven by both AC and DC.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Power supply cord 3 Hose 4 Hand handle 5 Hand operation part 6 Extension pipe 7 Floor surface suction tool 11 AC power supply (commercial power supply)
12 DC power supply (secondary battery)
13 Power supply circuit (main power supply)
14 Hz signal detection unit 15 Main power supply start circuit 16 Power supply for trigger circuit 17 Trigger circuit 18 Operation input reception unit 19 Signal control unit (microcomputer)
20 Semiconductor switching element 21, 26, 40, 43 Transistor 22, 23, 25, 33, 42, 45, 46, 47, 48, 51 Resistor 30, 41, 50 Diode 31 Limiting resistor 32 Zener diode 34 Output smoothing capacitor 35 FET
52, 53, 54, 55 switch

Claims (3)

A vacuum cleaner body, a handle portion, and an operation input receiving portion that is provided in the handle portion and inputs a driving operation,
In the cleaner body, at least an electric blower,
A power cord that can be connected to an AC power source;
A secondary battery;
A Hz signal detector for detecting whether or not the power cord is connected to the AC power source;
A signal control unit for controlling the electric blower and performing detection by the Hz signal detection unit;
A power supply circuit of the signal control unit;
A power supply for a trigger circuit to which power is supplied from the secondary battery;
A trigger circuit that uses the power supply for the trigger circuit as a power source,
The power supply path from the power cord to the power circuit and a part of the supply path from the secondary battery to the power circuit are shared, and the power supply path opening / closing section from the secondary battery to the power circuit As a semiconductor switching element,
When power supply from the AC power is cut off, the by mains activation signal from the previous SL trigger circuit shall be the source of the trigger circuit power supply by the operation input from the operation input reception unit semiconductor switching element Is turned on, the power supply circuit is activated, the signal control unit starts operation, and when there is no operation input, the electric power is supplied from the secondary battery only to the power supply for the trigger circuit. The vacuum cleaner of Claim 1 which applied the ceramic capacitor to the output smoothing capacitor of the said power supply for trigger circuits. The vacuum cleaner according to claim 1 or 2, wherein a zener diode is connected to the power supply for the trigger circuit so as to be connected in series with the secondary battery.

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