JP6089211B2 - Rechargeable vacuum cleaner - Google Patents

Description

  The present invention relates to a rechargeable vacuum cleaner that operates using a secondary battery as a power source.

  Conventionally, as a rechargeable vacuum cleaner of this type, a secondary battery is used as a power source, an electric blower, dust detection means for detecting sucked dust, and a display unit that performs display according to the output of the dust detection means What is made to perform is known (for example, refer patent document 1).

JP 2001-61739 A

  However, in the conventional configuration, the secondary battery is used as a power source, and dust is detected by the dust detection means and operated to notify the presence / absence of dust at the hand control unit, so the capacity of the secondary battery is discharged. If the voltage is reduced by the voltage, the voltage of the secondary battery changes, which causes a problem that the dust detection sensitivity is not stable.

  In order to stabilize the detection sensitivity, it is conceivable to operate the dust detection means with a DC power supply apparatus that has been stepped down from the secondary battery. However, if the battery voltage is low, the output from the DC power supply apparatus also decreases. , There is a risk that the power supply to the dust detection means and the notification means will be insufficient, or the signal transmission between the hand operating part and the control means will not be possible, and the main body of the vacuum cleaner may not be operated reliably by the operation of the hand operating part. There were low issues.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a rechargeable vacuum cleaner capable of performing a stable operation regardless of a voltage change of a secondary battery.

In order to solve the above-described conventional problems, an electric vacuum cleaner of the present invention includes an electric blower, a secondary battery serving as a power source, dust detection means for detecting dust, a hand operation unit that performs hand operation, and the two is powered from the following cell, a first DC power supply hand stage as a power source of the dust detection means, a battery voltage detecting means for detecting a voltage of the secondary battery, detected the secondary battery of the battery voltage detecting means when the battery voltage is high, a step-down means for stepping down the voltage fed to the first DC power supply means, when the battery voltage is low the detected secondary battery of the battery voltage detecting means, said first Boosting means for boosting the voltage supplied to the DC power supply means .

  The rechargeable vacuum cleaner of the present invention can output a constant voltage even when the voltage of the secondary battery changes, and can perform a stable operation regardless of the voltage change of the secondary battery.

1 is an external perspective view of a rechargeable electric vacuum cleaner according to Embodiment 1 of the present invention. It is the external appearance perspective view of the state which isolate | separated the dust collecting container from the vacuum cleaner main body of the vacuum cleaner in the embodiment, (a) is the external appearance perspective view seen from diagonally forward, (b) is the external appearance seen from diagonally back Perspective view Control circuit diagram in the same embodiment Discharge characteristic diagram of the secondary battery in the same embodiment

The first invention is an electric blower, a secondary battery serving as a power source, dust detection means for detecting dust, a hand operation unit for performing hand operation, a power supply from the secondary battery, and a power source for the dust detection means a first DC power supply hand stage a, a battery voltage detecting means for detecting a voltage of the secondary battery, when the detected battery voltage of the secondary battery of the battery voltage detecting means is high, the first Step-down means for stepping down the voltage supplied to the DC power supply means, and step up the voltage supplied to the first DC power supply means when the battery voltage of the secondary battery detected by the battery voltage detection means is low A boosting means is provided.

  With this configuration, even when the voltage of the secondary battery changes, the dust detection means and the like can be operated at a constant voltage, and stable dust detection sensitivity can be obtained, and reliable notification can be performed by the notification means. it can. In addition, the operation signal of the hand operation unit can be reliably output, and the operation reliability can be improved.

  2nd invention is equipped with the control means which processes the signal of the said dust detection means, and controls the said electric blower, The 2nd DC power supply means used as the power supply of the said control means, The said 2nd DC power supply means By supplying power from the first DC power supply means which is a constant voltage, the control means can secure a stable voltage and improve communication accuracy.

  According to a third aspect of the present invention, the dust detection means and the hand control unit are supplied with power from the first DC power supply means, and the control means is supplied with power from the second DC power supply means, thereby stably detecting dust. It is possible to perform the operation, and the hand operation signal can be stably transmitted to the control means.

  According to a fourth aspect of the present invention, the first DC power supply means starts outputting when the hand operation unit is operated, so that there is no current consumption in the first DC power supply means when the hand operation is not performed. By suppressing the consumption of the secondary battery, the overdischarge of the secondary battery can be suppressed.

  According to a fifth aspect of the present invention, the output of the first DC power source means is stopped when a preset time has elapsed after the electric blower is stopped. By suppressing consumption of the secondary battery without current consumption, secondary battery overdischarge can be suppressed.

  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)
1 and 2 are external perspective views of a rechargeable vacuum cleaner according to an embodiment of the present invention, and FIG. 3 is a control circuit diagram according to the embodiment.

  In FIG. 1, the rechargeable electric vacuum cleaner connects the suction tool 23 to the cleaner main body 1 via an extension pipe 28 and a hose 27. The hose 27 includes a hand operation unit 25 that selects various operation modes (for example, suction force such as strong, medium, weak, and stop) at one end and a hose connection unit 26 that is coupled to the cleaner body 1 at the other end. Yes.

  The vacuum cleaner main body 1 includes an electric blower 2 that generates suction air at the rear, a secondary battery 34, and a circuit board (not shown), and a dust collection container 3 that separates and collects dust at the front. And a charging terminal 35 for charging the secondary battery 34 is provided on the rear surface of the cleaner body 1.

The vacuum cleaner body 1 is placed on a charging stand (not shown), and the charging terminal 35 is connected to the charging stand charging terminal of the charging stand to charge the secondary battery 34.

  Next, based on FIG. 3, the control circuit of the rechargeable vacuum cleaner in the present embodiment will be described.

  In FIG. 3, the voltage of the secondary battery 34 is detected by the battery voltage detection means 41. When the voltage of the secondary battery 34 detected by the battery voltage detection means 41 is a voltage that is equal to or higher than a predetermined voltage (for example, 32 V) set in advance, the voltage is reduced by the voltage reduction means 42, and when the voltage is less than the predetermined voltage, the voltage increase means The voltage is boosted at 43 and supplied to the first DC power supply means 44. A constant voltage is supplied to the first DC power supply means 44 regardless of the voltage of the secondary battery 34.

  The second DC power supply means 45 is a power supply for the control means 46, and a preset voltage (for example, 5V) is output.

  The hose connection portion 26 is provided with dust detection means 47 for detecting dust contained in the suction air passing through the hose connection portion 26, and the dust detection means 47 is connected to the first DC power supply means 44. The power supply is controlled by the control means 46. The detection signal of the dust detection means 47 is output to the control means 46 via the power line.

  The hand operating unit 25 is supplied with power from the first DC power supply means 44. The hand operation unit 25 includes a plurality of switch means 48 for hand operation, and a notifying means 49 for notifying the user that dust has been detected by the dust detecting means 47. In order to output a hand operation signal from the switch means 48, resistors having different resistance values are connected to each switch means 48, and the control means 46 recognizes which switch means 48 has been operated by a voltage change. When the control means 46 detects the presence of dust from the signal from the dust detection means 47, the control means 46 outputs a signal for operating the notification means 49. The detection signal of the dust detection means 47 and the hand operation signal of the switch means 48 are output to the control means 46 via the power line.

  The control means 46 outputs an ignition pulse such as PWM for controlling the power of the electric blower 2 to the electric blower driving means 50 based on the operation information by the operation of the hand operation unit 25, and the power supply based on the operation information. The power of the first DC power supply means 44 is output via the start-up means 51, and the power is output to the dust detection means 47, and the suction force of the electric blower 2 is increased based on the dust detection signal from the dust detection means 47. Variable control is performed.

  The operation and action of the rechargeable vacuum cleaner configured as described above will be described below with reference to FIG.

  In the non-use state of the rechargeable vacuum cleaner, the vacuum cleaner body 1 is mounted on the charging stand and is in a charged state of the secondary battery 34. When the secondary battery 34 is fully charged, the secondary battery 34 Charging is stopped. In this non-use state, no power is output from the first DC power supply means 44, and the current consumption of the secondary battery 34 is suppressed.

  When the cleaner main body 1 is detached from the charging stand and the hand operating unit 25 is operated and, for example, “medium” is selected, the power supply startup means 51 outputs the power of the first DC power supply means 44. In the fully charged state of the secondary battery 34, the voltage of the secondary battery 34 is 42V, which is higher than the predetermined voltage 32V set in advance by the battery voltage detecting means 41. 32V is output. Along with the output of electric power from the first DC power supply means 44, 5V which is a preset voltage is output from the second DC power supply means 45, and the control means 46 becomes controllable.

  The control means 46 outputs a signal so as to continue outputting power to the first DC power supply means. Thereafter, when a hand operation signal is detected and it is recognized that the “medium” position is selected, an ignition pulse signal is output to the electric blower driving means 50, and the electric blower 2 is driven to generate a suction force. The control means 46 controls the suction force by varying the ON / OFF width of the ignition pulse signal.

  Further, power is supplied from the first DC power supply means 44 to the dust detection means 47 to operate the dust detection means 47. When the dust detection signal is input from the dust detection means 47, the control means 46 changes the ON / OFF width of the ignition pulse signal so as to increase the suction force of the electric blower 2 and distributes it to the hand operating section 25. The informing means 49 provided is operated to inform the user that dust is being sucked.

  As the cleaning operation progresses, the voltage of the secondary battery 34 decreases as shown in FIG. When the voltage of the secondary battery 34 decreases and becomes lower than the predetermined voltage 32V set in advance by the battery voltage detecting means 41, the voltage is boosted by the boosting means 43 and the output of 32V from the first DC power supply means 44 is continued. Let

  When the cleaning is finished and the "turn off" of the hand operating unit 25 is operated, the control means 46 stops the power supply output of the dust detection means 47 and the ignition pulse signal output of the electric blower driving means 50, and operates. Stop. Thereafter, when a preset time (for example, 5 minutes) elapses, the voltage continuous output signal of the first DC power supply means 44 is stopped, and the current consumption of the secondary battery 34 is suppressed.

  In addition, even when “OFF” of the hand operating unit 25 is not operated, the control unit 46 stops the operation of the secondary battery 34 when the voltage of the secondary battery 34 reaches a preset voltage (for example, 25 V). Prevent overdischarge.

  As described above, in the present embodiment, by providing the first DC power supply means 44 that outputs a constant voltage even when the voltage of the secondary battery 34 changes, stable dust detection and notification at the time of dust detection are provided. It can be performed.

  Further, since the second DC power supply means 45 is supplied with a preset voltage from the first DC power supply means 44 which is a constant voltage, a stable voltage can be secured and communication accuracy can be improved.

  Further, the first DC power supply means 44 starts output when the hand operating unit 25 is operated, and continues output while the electric blower 2 is operating. Consumption can be suppressed, and overdischarge of the secondary battery 34 can be prevented.

  The second DC power supply means 45 is used as a power supply for the control means 46 and has a small power supply capacity. Therefore, the second DC power supply means 45 can be realized without increasing the size of the control board. By setting the voltage between the full charge and the end of discharge, the input / output voltage change is small, the efficiency is improved, and the heat generation can be suppressed. Therefore, the vacuum cleaner body 1 can be reduced in size and weight. .

  As described above, the rechargeable vacuum cleaner according to the present invention can detect the voltage of the secondary battery, and can output a constant voltage by stepping up or down, and the supply power of the dust detection means is stable. Dust detection accuracy can be stabilized, and the notification means for notifying that dust has been detected can be operated stably. Applicable.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 25 Hand operation part 34 Secondary battery 41 Battery voltage detection means 42 Voltage drop means 43 Pressure rise means 44 1st DC power supply means 45 2nd DC power supply means 47 Dust detection means 49 Notification means

Claims (5)

An electric blower, a secondary battery as a power source, dust detection means for detecting dust, a hand operation unit for performing hand operation, and a first direct current supplied from the secondary battery and serving as a power source for the dust detection means a power hand stage, a battery voltage detecting means for detecting a voltage of the secondary battery, when the battery voltage of the detected secondary battery of the battery voltage detecting unit is high, power is supplied to the first DC power supply means And a step-down means for stepping down the voltage to be supplied, and a step-up means for stepping up the voltage supplied to the first DC power supply means when the battery voltage of the secondary battery detected by the battery voltage detection means is low. Characteristic rechargeable vacuum cleaner. Control means for processing the signal of the dust detection means and controlling the electric blower, and second DC power supply means serving as a power source for the control means, wherein the second DC power supply means is a constant voltage 2. The rechargeable vacuum cleaner according to claim 1, wherein power is supplied from the first DC power supply means. 3. The rechargeable electric power according to claim 1, wherein the dust detection unit and the hand operating unit are supplied with power from the first DC power supply unit, and the control unit is supplied with power from the second DC power supply unit. Vacuum cleaner. 4. The rechargeable electric vacuum cleaner according to claim 1, wherein the first DC power supply means starts output when the hand operating unit is operated. 5. The rechargeable vacuum cleaner according to claim 1, wherein the output of the first DC power supply means is stopped when a preset time has elapsed after the electric blower is stopped.

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