JP2005328876A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner having no restriction on disposition of thermosensitive element or the like and controlling a motor fan to secure the safety. <P>SOLUTION: The vacuum cleaner includes the motor fan 1 for sucking dust, an air flow rate sensing means 2 for detecting air flow rate to a dust collecting chamber for collecting the sucked dust, an input control means 3 for controlling the motor fan 1, and an input operation means 4 for outputting a control signal to the input control means 3 by output from the air flow rate sensing means 2. When the output from the air flow rate sensing means 2 is higher or lower than a predetermined range even if a predetermined time passes, the input operation means 4 does not output the control signal and stops the motor fan 1. Accordingly, the vacuum cleaner has no restriction on disposition of the thermosensitive element or the like and secures the safety of the motor fan by the sensing of the air flow rate to the dust collecting chamber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention can cope with situations such as when the rotating brush is locked during cleaning, abnormalities in the electric blower for sucking dust, or abnormalities in the electric motor that drives the rotating brush. It relates to a vacuum cleaner that can be used.

Conventional vacuum cleaners are known that provide a temperature-sensitive element with a self-holding function in the vicinity of an electric blower or an electric motor in preparation for occurrence of an abnormality to prevent the electric blower or the electric motor from being in an abnormally heated state. (For example, refer to Patent Document 1).
US Pat. No. 6,553,611

  However, in the conventional configuration, a temperature sensitive element must be provided in the vicinity of the electric blower or the electric motor, and there is a problem in that there is a great limitation in arrangement.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an electric vacuum cleaner capable of ensuring safety by controlling an electric blower or an electric motor without any restriction in arrangement of a temperature sensitive element or the like. It is what.

  In order to solve the above-described conventional problems, the vacuum cleaner of the present invention includes an electric blower for sucking dust, a dust collecting chamber for collecting sucked dust, and an air flow rate to the dust collecting chamber. Air flow detection means, input control means for controlling the electric blower, and input calculation means for outputting a control signal to the input control means in accordance with the output of the air flow detection means. When the output of the means is higher or lower than a predetermined range of values, the input calculation means is configured to stop the electric blower without outputting a control signal.

  Thereby, there is no restriction | limiting in arrangement | positioning, such as a temperature sensing element, and the safety | security of an electric blower can be ensured by the air volume detection to a dust collection chamber.

  In addition, the vacuum cleaner of the present invention includes a suction tool with a built-in electric motor that drives a rotating brush that sweeps out dust on the surface to be cleaned, current detection means for detecting the current flowing through the electric motor, and electric motor control for controlling the electric motor. And when the output of the current detection means is higher or lower than a predetermined limit value even after a predetermined time has elapsed, the motor is stopped without outputting a control signal from the motor control means. It is composed.

  Thereby, there is no restriction | limiting on arrangement | positioning, such as a temperature sensing element, and the safety | security of an electric motor is securable by the electric current detection which flows into an electric motor.

  The electric vacuum cleaner of the present invention can ensure safety by controlling the electric blower or the electric motor without any restriction on the arrangement of the temperature sensitive element or the like.

  1st invention controls the electric blower for attracting | sucking dust, the dust collection chamber which collects the attracted dust, the air volume detection means which detects the air volume to this dust collection chamber, and the said electric blower Input control means and input calculation means for outputting a control signal to the input control means by the output of the air volume detection means, and the output of the air volume detection means is higher than a predetermined range even after a predetermined time If it is low or low, the input calculating means does not output a control signal and the electric blower is configured to stop the electric blower. The safety of the electric blower can be ensured by detecting the air volume to the room.

  In the second invention, in particular, in the first invention, when the control signal is not output from the input calculation means, the operation is maintained unless the “OFF” switch operation or the power cord is removed from the plug. With this configuration, once the electric blower is stopped, the operation is not automatically performed.

  The third invention controls an electric blower for sucking dust, a dust collection chamber for collecting the sucked dust, an air volume detection means for detecting an air volume to the dust collection chamber, and the electric blower. Input control means, and input calculation means for outputting a control signal to the input control means by the output of the air volume detection means, and when the output of the air volume detection means is higher than a predetermined range of values, the input calculation means Since the input of the electric blower is suppressed by outputting the value of the control signal from the constant value to suppress the input while the dust is not accumulated, the electricity bill can be saved.

  4th invention is equipped with the suction tool which incorporated the electric motor which drives the rotating brush which scrubs off the dust on a to-be-cleaned surface, the electric current detection means which detects the electric current which flows into this electric motor, and the electric motor control means which controls an electric motor If the output of the current detection means is higher or lower than a predetermined limit value even after a predetermined time has passed, the electric cleaning is configured to stop the motor without outputting a control signal from the motor control means. By using the machine, there is no restriction on the arrangement of the temperature sensing element and the like, and the safety of the motor can be ensured by detecting the current flowing through the motor.

  In the fifth invention, in particular, in the fourth invention, when the control signal is not output from the motor control means, the operation is maintained unless the “OFF” switch operation or the power cord is removed from the plug. With this configuration, once the electric motor is stopped, the automatic operation is not performed.

  6th invention is equipped with the suction tool which incorporated the electric motor which drives the rotating brush which draws out the dust on a to-be-cleaned surface, the electric current detection means which detects the electric current which flows into this electric motor, and the electric motor control means which controls an electric motor When the output of the current detection means is higher than a predetermined range, the motor control means outputs a signal for driving the motor at the maximum speed, so that the electric motor according to the floor condition It is possible to ensure the rotation at the starting torque.

  In a seventh aspect of the invention, in particular, in any one of the first to sixth aspects of the invention, the apparatus includes a voltage detection unit that detects a power supply voltage, corrects the output of the air volume detection unit and the current detection unit, and By adopting a configuration that suppresses input, high reliability of the electric blower or the electric motor can be secured.

  According to an eighth aspect of the invention, in particular, in the second or fifth aspect of the invention, the "off" switch operation is configured to stop a load such as an electric blower or an electric motor, so that it is not necessary to use a power switch. It is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment)
In FIG. 1, the cleaner body 10 has a built-in electric blower 1 for sucking dust, and on the suction side of the electric blower 1, that is, on the upper side, a dust collecting chamber 11 for collecting sucked dust is provided. Provided. A hose 12 that communicates with the dust collecting chamber 11 is provided in front of the cleaner body 10. The other end of the hose 12 is connected to a suction tool 13 that includes a rotating brush and an electric motor 5 that drives the suction brush. 13, the hose 12 and the dust collecting chamber 11 form an intake path. A person who performs cleaning operates a switch provided on the suction tool 13 in accordance with the state of the surface to be cleaned, and controls the operation of the rotating brush by driving the electric motor 5. At this time, the electric motor 5 is cooled by the wind flowing through the intake path. Further, the handle 14 of the cleaner body 10 is provided with a switch 9 for the user to perform “ON” and “OFF” operations. The “off” switch operation of the switch 9 is configured to stop loads such as the electric blower 1 and the electric motor 5, so that it is not necessary to use a power switch.

  Next, the control of the vacuum cleaner in the present embodiment will be described with reference to FIG.

  The air volume detection means 2 detects the air volume to the dust collection chamber 11 that collects dust, and uses a current sensor. The input control means 3 controls the electric blower 1. The input calculation means 4 outputs a control signal to the input control means 3 by the output of the air volume detection means 2. The electric motor 5 that drives the rotating brush drives the rotating brush to scavenge dust on the surface to be cleaned. The current detection means 6 detects the current flowing through the electric motor 5 and inputs it to the input calculation means 4. The electric motor control means 7 controls the electric motor 5 by the output of the input calculation means 4. The voltage detection means 8 detects the power supply voltage and outputs it to the input calculation means 4. By correcting the output of the air volume detection means 2 and the current detection means 6, if the power supply voltage is high, the input of the electric blower 1 and the electric motor 5 is suppressed, and if the power supply voltage is low, the input of the electric blower 1 and the input of the electric motor 5 are increased to ensure high reliability.

  Here, if the output of the air volume detection means 2 is higher or lower than a predetermined range even after a predetermined time has elapsed, the input calculation means 4 outputs a control signal. Therefore, the electric blower 1 is stopped. Thereby, there is no restriction | limiting on arrangement | positioning, such as a temperature sensing element, and the safety | security of the electric blower 1 is ensured by the air volume detection to the dust collection chamber 11.

  If the output of the air volume detection means 2 is higher than a predetermined range even after a predetermined time has elapsed, the control signal value is set to a constant value to suppress the input to the electric blower 1. Thus, the input can be suppressed while the dust is not accumulated, and the electricity bill can be saved. On the other hand, when the output of the air volume detection means 2 is lower than a predetermined value, the drive signal of the electric blower 1 is stopped.

  Further, since the output of the air volume detection means 2 does not fall within a predetermined range even after a predetermined time has elapsed, if the control signal is not output from the input calculation means 4, the switch 9 is turned off. The operation is maintained unless the switch is operated or the power cord of the vacuum cleaner main body 10 is removed from the plug.

  Similarly, the input calculation means 4 does not output a control signal from the motor control means 7 if the output of the current detection means 6 is higher or lower than a predetermined limit value even after a predetermined time has elapsed. The electric motor 5 is configured to be stopped. Thereby, there is no restriction | limiting on arrangement | positioning, such as a temperature sensing element, and the safety | security of an electric motor is ensured by the electric current detection which flows into the electric motor 5. FIG.

  If the output of the current detection means 6 is higher than a predetermined range even after a predetermined time has elapsed, the motor control means 7 is configured to output a signal for driving the motor 5 at the maximum speed. Thereby, rotation with the starting torque of the electric motor 5 according to the condition of the floor surface can be secured. When the output of the current detection means 6 is high enough to exceed the limit value, no signal is output from the motor control means 7.

  Further, since the output of the current detection means 6 does not fall within a predetermined range even after a predetermined time has elapsed, once the control signal is not output from the motor control means 7, the switch 9 is turned off. The operation is maintained unless the switch is operated or the power cord of the vacuum cleaner main body 10 is removed from the plug.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below, referring FIG.

  When the amount of dust collection in the dust collection chamber 11 is small, the air volume is large, and the input of the electric blower 1 is suppressed as indicated by point (a). The degree is such that the input is suppressed when the power supply voltage is high, and the suppression of the input is reduced when the power supply voltage is low.

  When dust accumulates in the dust collection chamber 11 and the air volume decreases, the electric blower 1 operates at the highest input as shown by point (b). As this state progresses, the air volume decreases extremely, and finally the cooling air of the electric blower 1 hardly flows, and the electric blower 1 becomes slightly heated. In addition, since the electric blower 1 has a low air resistance, the current flowing through the electric blower 1 has a characteristic of decreasing. Therefore, it is possible to detect a decrease in the air volume by the air volume detection means 2 using a current sensor.

  Therefore, when the air volume becomes low, heating is prevented because the electric blower 1 is stopped without being output from the input calculation means 4. In such a case, the electric blower 1 is automatically set so that the operation is maintained unless the “off” switch of the switch 9 is operated or the power cord of the cleaner main body 10 is removed from the plug. Will not start to move.

  In addition, when cleaning floor cleaning with a large load resistance, the current value of the electric motor 5 becomes high, so that a signal for driving the electric motor 5 at the maximum speed is output from the electric motor control means 7, and thereby the starting torque is reduced. Since this can be ensured, the electric motor 5 is free from the locked state.

  However, if the motor is still locked, no drive signal is output from the motor control means 7 and the motor 5 stops. In such a case, it is set so that the operation is maintained unless the “off” switch of the switch 9 is operated or the power cord of the cleaner body 10 is removed from the plug. It does n’t move.

  In the present embodiment, a current sensor is used as the air volume detection means 2, but a pressure sensor or the like may be used. Further, a tachometer or the like may be used as the current detection means 6.

  In the present embodiment, a power switch that shuts off the power source is disclosed as the switch 9. However, since it is important to stop the load of the electric blower 1, the electric motor 5, etc. It is only necessary to generate a “OFF” signal and process the signal with a microprocessor to stop the load, and the power switch is not necessarily used as the switch 9.

  As described above, the vacuum cleaner according to the present invention can control the electric blower or the electric motor without any restriction on the arrangement of the temperature sensing element or the like, so that safety can be ensured, such as an upright type or a canister type. Applicable to general vacuum cleaners.

The block diagram of the vacuum cleaner which shows embodiment of this invention Block diagram showing the control circuit of the vacuum cleaner Characteristic diagram showing the relationship between air flow and input of the vacuum cleaner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric blower 2 Air volume detection means 3 Input control means 4 Input calculation means 5 Electric motor 6 Current detection means 7 Electric motor control means 8 Voltage detection means 9 Switch 11 Dust collection chamber 13 Suction tool

Claims (8)

An electric blower for sucking dust, a dust collection chamber for collecting the sucked dust, an air volume detection means for detecting the air volume of the dust collection chamber, an input control means for controlling the electric blower, and the air volume Input calculation means for outputting a control signal to the input control means by the output of the detection means, if the output of the air volume detection means is higher or lower than a predetermined range value even after a predetermined time has passed, The vacuum cleaner configured to stop the electric blower without outputting the control signal from the input calculation means. 2. The electric cleaning according to claim 1, wherein when the control signal is not output from the input arithmetic means, the state is maintained unless the operation switch is turned off or the power cord is unplugged. Machine. An electric blower for sucking dust, a dust collecting chamber for collecting sucked dust, an air volume detecting means for detecting the air volume of the dust collecting chamber, an input control means for controlling the electric blower, and the air volume Input calculation means for outputting a control signal to the input control means by the output of the detection means, and when the output of the air volume detection means is higher than a predetermined range, the value of the control signal from the input calculation means is A vacuum cleaner configured to output at a constant value and suppress the input of the electric blower. A suction tool with a built-in electric motor that drives a rotating brush that sweeps out dust on the surface to be cleaned, a current detecting means for detecting a current flowing through the electric motor, and an electric motor control means for controlling the electric motor, and a predetermined time has elapsed. A vacuum cleaner configured to stop the electric motor without outputting a control signal from the electric motor control means when the output of the current detection means is higher or lower than a predetermined limit value. 5. The electric cleaning device according to claim 4, wherein when the control signal is not output from the motor control means, the state is maintained unless the operation switch is turned off or the power cord is unplugged. Machine. A suction tool having a built-in electric motor that drives a rotating brush that sweeps out dust on the surface to be cleaned, a current detecting means for detecting a current flowing through the motor, and an electric motor controlling means for controlling the electric motor, and an output of the current detecting means A vacuum cleaner configured to output a signal for driving the motor at a maximum speed from the motor control means when the value is higher than a predetermined range. The electric cleaning according to any one of claims 1 to 6, further comprising a voltage detection means for detecting a power supply voltage, wherein the output of the air volume detection means and the current detection means is corrected to suppress the input of the electric blower or the electric motor. Machine. The electric vacuum cleaner according to claim 2 or 5, wherein a load such as an electric blower or an electric motor is stopped when the operation switch is set to "OFF".

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