WO2009091076A1 - Aspirateur - Google Patents

Aspirateur Download PDF

Info

Publication number
WO2009091076A1
WO2009091076A1 PCT/JP2009/051012 JP2009051012W WO2009091076A1 WO 2009091076 A1 WO2009091076 A1 WO 2009091076A1 JP 2009051012 W JP2009051012 W JP 2009051012W WO 2009091076 A1 WO2009091076 A1 WO 2009091076A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
water level
water
dust collector
electrodes
Prior art date
Application number
PCT/JP2009/051012
Other languages
English (en)
Inventor
Kumio Takahashi
Masahiro Inaniwa
Yoshimasa Hayama
Daisuke Kakegawa
Original Assignee
Hitachi Koki Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Koki Co., Ltd. filed Critical Hitachi Koki Co., Ltd.
Publication of WO2009091076A1 publication Critical patent/WO2009091076A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0023—Recovery tanks
    • A47L7/0028—Security means, e.g. float valves or level switches for preventing overflow
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A47L9/127—Dry filters tube- or sleeve-shaped
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply

Definitions

  • the present invention relates to a dust collector which sucks dust produced by an electric tool, together with water.
  • a dust collector collects dust produced by cutting or grinding with an electric tool.
  • Some electric tools are of a type which drops water on a cutting place and a type which rinses a member to be cut with water to prevent scattering of dust and cool the blade.
  • some dust collectors are of a wet and dry type capable of sucking both dry dust and water-containing dust.
  • the wet and dry type dust collector has a filter which separates sucked dust from water, and a tank which stores the separated water. The filter may be clogged when soaked in water.
  • the wet and dry type dust collector has a water level detector to detect the water level in the tank. The water level detector stops the suction unit when a voltage is applied between a pair of electrodes, disposed under the filter, and the current between the electrodes becomes equal to or greater than a preset value.
  • the dust collector with the foregoing structure has a problem that water in the tank waves to let the current flow between the electrodes for only a short period of time, so that the dust collector may halt.
  • the conventional wet and dry type dust collector is configured to stop the suction unit when the current flows for around a second or longer, and prevent the suction unit from operating thereafter unless the ON/OFF switch of the dust collector is set OFF once.
  • the suction unit is in operation for about one second. If switching of the ON/OFF switch between the OFF state and the ON state is repeated, therefore, the suction unit is kept operating to gradually suck water into the tank, so that the filter is soaked in the water.
  • Patent Document 1 discloses a wet and dry type dust cleaner having a mechanism of preventing a float switch from malfunctioning.
  • Patent Document 2 discloses a dust collector which automatically operates a dust catcher when the filter is clogged, thereby removing dust from the filter.
  • Patent Document 1 Unexamined Japanese Patent Application KOKAI Publication No. H05-228076
  • Patent Document 2 Unexamined Japanese Patent Application KOKAI Publication No. 2007-245019
  • the present invention has been made in consideration of the foregoing problems, and it is an object of the invention to provide a dust collector capable of solving the problem that the filter is soaked in water.
  • a dust collector includes: a suction unit that sucks dust; a tank that stores the dust sucked from an inlet port by the suction unit; a water level detecting unit that detects a water level in the tank; an ON/OFF switch that instructs operation/stopping of the suction unit; and a control unit that controls an operation of the suction unit based on a status of the ON/OFF switch and the water level detected by the water level detecting unit, and further controls the suction unit in such a way that the suction unit does not come to an operational when the water level in the tank detected by the water level detecting unit exceeds a threshold value with the ON/OFF switch being set ON; wherein when the water level detecting unit detects that the water level in the tank exceeding the threshold value while the ON/OFF switch is ON and the suction unit is in operation, the control unit stops the suction unit after a given time elapses since the detection.
  • the dust collectors with the foregoing structures can prevent water from being collected in the tank to a level equal to or higher than a predetermined threshold value, thus solving the problem that the suction unit is kept operating to gradually suck water into the tank to cause the filter to be soaked in the water.
  • FIG. 1 is an outline diagram of a dust collector according to an embodiment of the invention
  • FIG. 2 is a side cross-sectional view of the main body of the dust collector according to an embodiment of the invention
  • FIG. 3 is a block diagram showing the configuration of a controller of the dust collector according to an embodiment of the invention.
  • FIG. 4 is a circuit diagram showing one example of a water level detecting circuit of the dust collector according to an embodiment of the invention.
  • FIGS. 5 A to 5 C are flowcharts illustrating the control operation of the dust 5 collector according to an embodiment of the invention.
  • the dust collector according to the embodiment serves to clean a floor or so in a work area where electric tools for cutting wood, such as a circular saw and jigsaw, and electric tools, such as a hammer drill and a stone cutter, which are used in drilling, cutting, grinding or the like concrete or stone, are used.
  • a dust collector 100 has a main body 1 and a suction port 15 101.
  • the dust collector 100 sucks dust on a floor together with ambient air and water through the suction port 101 inside the main body 1 via a hose 102 and an inlet port 3.
  • An operation panel 15 is arranged on the upper front side of the main body 1.
  • the operation panel 15 has a main switch 17, a mode switch 29, an alarm indicator 20, etc. arranged thereon.
  • 20 [0016] As shown in a cross-sectional view of FIG. 2, the main body 1 has a cylindrical tank 2 to store dust.
  • the inlet port 3 is formed in a side portion of the tank 2.
  • a motor base 4, a motor cover 5 and a head cover 6, which are formed integral with one another, are clamped to the upper opening portion of the tank 2.
  • a suction unit 7 is disposed between the motor base 4 and the motor cover 5.
  • the suction unit 7 comprises a suction fan 8, and a motor 9 which rotates the suction fan 8.
  • the motor base 4, the motor cover 5 and the head cover 6 form a discharge path to discharge air, sucked through an intake port 4a, provided at the lower portion of the motor base 4, to a discharge port 4b.
  • a control board 14, the operation panel 15 and an insulation transformer 23 are provided at that portion of the motor cover 5 which is located above the inlet port 3.
  • a water level detecting circuit 28 which detects the position (water level) of the top surface 5 of water collected in the tank 2 is formed at the control board 14. The water level detecting circuit 28 will be described later referring to FIG. 3.
  • a pair of contacts 25a, 25b are provided at the lower portion of the motor base 4.
  • a pair of lead wires connected to a pair of input terminals of the water level detecting circuit 28 at the control board 14 are respective connected to the pair of contacts 25a, 25b
  • a filter housing 11 is fixed and secured between the upper end of the side wall of the tank 2 and the motor base 4.
  • a filter 13 which filters out dust and passes air alone, and a filter cover 12 which holds the filter 13 in such a way that the filter 13 does not collapse due to internal negative pressure are mounted to the filter housing 11.
  • the filter housing 11 is provided with a pair of contacts 26a, 26b.
  • the pair of contacts 25a, 25b face contacting the pair of contacts 26a, 26b.
  • a pair of electrodes 27a, 27b for detecting the water surface (water level) in the tank 2 are disposed at the lower end of the filter 13.
  • the electrodes 27a, 27b have distal
  • the distal ends of the electrodes 27a, 27b are disposed to be positioned at the position of the upper limit of the allowable range of water collected in the tank 2.
  • the pair of electrodes 27a, 27b are respectively connected to the pair of contacts 25a, 25b provided at the filter housing 11 on the filter 13 side via the pair of contacts 26a, 26b on the motor base 4 side. Accordingly, the pair of
  • the water level detecting circuit 28 includes a comparator CM, resistors Rl, R2, R3, R4, R5, R6, R7, and capacitors Cl 3 C2, C3.
  • the resistor and capacitor comprise, for example, a chip resistor and a chip capacitor, respectively.
  • a voltage of +5 V is supplied to the power supply terminal of the comparator CM from a DC power supply 24.
  • the capacitor C2 connected between the anode and cathode of the DC power supply 24 serves to reduce power supply noise.
  • the voltage of +5 V is applied to one electrode 27a via the resistor Rl, the contact 25a and the contact
  • the other electrode 27b is connected to the ground terminal of the DC power supply 24 via the contact 26b, the contact 25b and the resistor
  • a current which flows between the electrodes 27a, 27b is converted to a voltage Vin expressed by the following equation.
  • the voltage Vin is input to the +
  • Vin (5 V - (resistance of resistor Rl) x (value of the current I flowing between the electrodes 27a, 27b)
  • the reference voltage Vr is given by the following equation.
  • Vr 5-R5/(R4 + R5) [0026]
  • the output (water-level detection signal) of the comparator CM is input to a digital input port P02 of a microcomputer 22.
  • the resistor R6 pulls up the output terminal of the comparator CM.
  • the resistor R7 and the capacitor C3 serve to reduce noise.
  • the electrodes 27a, 27b are not soaked in water, the electrodes 27a, 27b are insulated from each other by an insulator, such as air or plastics. This causes the current to hardly flow between the electrodes 27a, 27b. Therefore, the voltage Vin becomes approximately 5 V from the above equations.
  • the electrodes 27a, 27b are soaked in water, on the other hand, the current flows between the electrodes 27a, 27b due to the conduciveness of water.
  • the intervals or the like between the resistors Rl, R2, and the electrodes 27a, 27b are set in such a way that when the electrodes 27a, 27b are soaked in water, the current flows therebetween becomes 1 to 2 ⁇ A.
  • the resistances (ratio) of the resistors Rl, R2, R4 and R5 are set in such a way that when the current I flowing between the electrodes 27a, 27b is smaller than 3.3 ⁇ A, the output (water-level detection signal) of the comparator CM becomes substantially 0 V (low level), and when the current I flowing between the electrodes 27a, 27b is larger than 3.3 ⁇ A, the output of the comparator CM becomes 5 V (high level).
  • the dust collector 100 has the motor 9, the control board 14, a power supply plug 16, the alarm indicator 20, the insulation transformer 23, the contacts 25a, 25b, 26a, 26b, the electrodes 27a, 27b, and so forth.
  • a capacitor 33 is connected between the two input terminals of the aforementioned water level detecting circuit 28.
  • a capacitor 34 is connected between the positive input terminal of the water level detecting circuit 28 and the plus electrode of the DC power supply 24.
  • a capacitor 35 is connected between the negative input terminal of the water level detecting circuit 28 and the minus electrode (ground) of the DC power supply 24.
  • the pair of electrodes 27a, 27b for detecting the water level are exposed from the filter device 10. Therefore, there may be a case where a worker touches the electrodes 5 27a, 27b at the time of removing the suction unit 7, the filter device 10, etc. from the tank 2 to dispose of dust or clean the filter 13.
  • the tank 2, the inlet port 3, the hose 102 and so forth are made of a conductive material and are connected to the ground. Therefore, there may be a case where when a worker touches the electrodes 27a,
  • the resistor Rl or the resistor R2 is deteriorated by electrostatic-discharge oriented migration, and its resistance may change, thus impairing the water-level detecting function.
  • dielectric breakdown or the like may occur to cause an internal damage on the comparator CM.
  • the main switch 17 is formed by an ON/OFF switch to enable or disable power supply to the motor 9 of the dust collector 100.
  • the mode switch 29 changes the operation mode of the dust collector 100 between an individual operation mode and a sequential operation mode.
  • a switch state detecting circuit 18, a motor drive circuit 19, an alarm indicator drive circuit 21, the microcomputer 22, the DC power supply 24, the water level detecting circuit 28, and a receptacle current detecting circuit 31 are disposed on the control board 14.
  • the power supply plug 16 connected to an AC power supply is connected to the motor 9, the motor drive circuit 19 and the insulation transformer 23.
  • the switch state detecting circuit 18 detects the ON/OFF action of the main switch 17, and the operation mode specified by the mode switch 29, and outputs data indicating the states of the switches 17 and 29 to digital ports POO and POl of the microcomputer 22.
  • the motor drive circuit 19 turns on or off (rotates or stops) the motor 9 using the AC voltage supplied through the power supply plug 16 under the control of the microcomputer 22.
  • the power control element of the motor drive circuit 19 is electrically insulated from a signal system (circuit which operates on the power from the DC power supply 24) by a photo insulating coupler called photo-triac coupler or photocoupler.
  • the alarm indicator drive circuit 21 turns on or off the alarm indicator 20 under the control of the microcomputer 22.
  • An AC voltage supplied from the commercially available power supply via the power supply plug 16 is applied to the primary winding of the insulation transformer 23.
  • the DC power supply 24 is connected to the secondary winding of the insulation transformer 23.
  • the DC power supply 24 has a rectifying circuit and a smoothing circuit to convert an AC voltage to a DC voltage, and supplies the DC voltage to the individual circuits on the control board 14. Therefore, the individual circuits (microcomputer 22, water level detecting circuit 28, switch state detecting circuit 18, etc.) which are supplied with the power from the DC power supply 24 are insulated from an external power supply by the insulation transformer 23.
  • the pair of electrodes 27a, 27b for detecting the water level are connected to the water level detecting circuit 28 via the pair of contacts 26a, 26b and the pair of contacts 25a, 25b.
  • the receptacle 32 is attached to the operation panel 15, and is applied with the AC voltage through the power supply plug 16. The plug of another electric device may be plugged into the receptacle 32 to acquire power.
  • the receptacle current detecting circuit 31 measures the current flowing to the receptacle 32 through a current detector (current transformer) 30 or the like.
  • the receptacle current detecting circuit 31 supplies a voltage signal indicating the measured current value to an analog input port Ainl of the microcomputer 22.
  • the microcomputer 22 incorporates a CPU (Central Processing Unit) and a memory, and operates according to a program stored.
  • the microcomputer 22 has an individual operation mode and sequential operation mode. The operation mode is changed over by the mode switch 29.
  • the microcomputer 22 controls the motor drive circuit 19 according to the ON/OFF action of the main switch 17 to change between the operation and the halting of the motor 9.
  • the microcomputer 22 executes an initialization process to initialize resistors, RAM, input/output ports, etc. (step SlOO). [0047] Next, the microcomputer 22 executes an instruction-standby input scan process starting at reference symbol "A" (step SIlO). In the instruction-standby input scan process (step SIlO), the microcomputer 22 first determines the state of the main switch 17 through the switch state detecting circuit 18 (step Sill). When the main switch 17 is OFF (step Sill; OFF), the dust collector 100 is not in an operational state. Therefore, the microcomputer 22 repeats the determination in step Sill until the main switch 17 is set ON.
  • step Sill When the microcomputer 22 determines that the main switch 17 is ON (step Sill; ON), the microcomputer 22 determines whether a water-level detection signal is at a low level (step Sl 12). hi other words, the microcomputer 22 determines whether or not water collected in the tank 2 has reached a threshold level, the electrodes 27a, 27b are soaked in water, and the current I flowing between the electrodes 27a, 27b is larger than a threshold value.
  • the microcomputer 22 determines through the switch state detecting circuit 18 whether the mode switch 29 indicates the individual operation mode or the sequential operation mode (step S 114). When the mode switch 29 indicates the individual operation mode (step S 114; INDIVIDUAL OPERATION MODE) 5 the microcomputer 22 executes an individual operation process starting at reference symbol "B" illustrated in FIG. 5B. That is, as the main switch 17 is set ON when the water in the tank 2 has not reached the threshold level in individual operation mode, the microcomputer 22 initiates the individual operation process starting at reference symbol "B".
  • the microcomputer 22 controls the motor drive circuit 19 to rotate the motor 9 (step S 121). As a result, the suction unit 7 starts air intake and the dust collector 100 starts collecting dust.
  • the mode switch 29 indicates the sequential operation mode (FIG. 5 A, step S 114; SEQUENTIAL OPERATION MODE)
  • the microcomputer 22 acquires the value of the current (receptacle current) flowing to an external electric tool from the receptacle 32 through the receptacle current detecting circuit 31.
  • the microcomputer 22 determines whether the receptacle current is larger than the threshold value (step Sl 15).
  • step Sl 15 When the microcomputer 22 determines that the receptacle current is larger than the threshold value (step Sl 15; YES), the microcomputer 22 initiates the sequential operation process starting at reference symbol "C" illustrated in FIG. 5C.
  • the microcomputer 22 initiates the sequential operation process starting at reference symbol "C" illustrated in FIG. 5C.
  • step S 112 When determining in step S 112 that the water-level detection signal is at a low level (step S112; YES), on the other hand, the microcomputer 22 determines whether the water-level detection signal keeps the low-level state for one second or longer (step S 113). In other words, the microcomputer 22 determines whether the electrodes 27a and 27b are. continuously soaked in water for one second or longer. Even if only a slight amount of water is collected in the tank 2, the water may wave to contact the electrodes 27a and 27b, so that a current temporarily flows therebetween. It is possible to determine that the electrodes 27a and 27b are surely soaked in water by discriminating that the current continuously flows for one second.
  • the scheme of measuring that the low level of the water-level detection signal has continued for one second is optional.
  • the following scheme i) or ii) can be employed.
  • step S112 When it is determined YES in step S112, i.e., that the water-level detection signal output from the water level detecting circuit 28 is at a low level, the microcomputer 22 determines whether a measurement-in-progress flag is set. When the measurement-in-progress flag is OFF, the measurement-in-progress flag is set and a timer is activated. When the measurement-in-progress flag is ON, on the other hand, the microcomputer 22 acquires the time measured by the timer, and determines whether the time has reached one second. When the time has reached one second, the microcomputer 22 shifts the control to a water-level detection process indicated by reference symbol "Dl".
  • the microcomputer 22 When the time has not reached one second yet, on the other hand, the microcomputer 22 returns the control to the top (reference symbol "A") in the instruction-standby input scan process. In this case, when it is determined OFF in step Sill and NO in step Sl 12, the measurement-in-progress flag is set OFF. ii) When it is determined YES in step S 112, the microcomputer 22 activates the internal timer to measure one second.
  • the microcomputer 22 determines whether the water-level detection signal output from the water level detecting circuit 28 is at a low level, and shifts the control to the water-level detection process indicated by reference symbol "Dl" if the signal is at the low level, and returns the control to the top of the instruction-standby input scan process SIlO if the signal is at the high level.
  • the microcomputer 22 first controls the motor drive circuit 19 to rotate the motor 9. This causes the suction unit 7 to start air intake and causes the dust collector 100 to start collecting dust. Subsequently, the microcomputer 22 initiates an individual-operation input scan process S 120 starting at reference symbol "Bl".
  • the microcomputer 22 scans the statuses of the main switch 17, the water level detecting circuit 28, the mode switch 29 and the receptacle current detecting circuit 31.
  • the microcomputer 22 first determines whether the main switch 17 is ON or OFF (step S 122). When the main switch 17 is ON, the microcomputer 22 determines whether the low-level state of the water-level detection signal output from the water level detecting circuit 28 continues for one second or longer (step S123). The scheme of checking if the low-level state of the water-level detection signal continues for one second or longer is optional, and schemes similar to the those used in the processes of the steps S 112 and S 113 can be adopted.
  • step S 124 the microcomputer 22 discriminates the operation mode indicated by the mode switch 29 (step S 124).
  • step S 124 indicates the individual operation mode
  • step S 122 the control goes to step S 122 to keep the individual operation
  • step S 124 SEQUENTIAL OPERATION MODE
  • step S 125 the microcomputer 22 determines whether the receptacle current is larger than the threshold value (step S 125).
  • step S 125 When it is determined in step S 125 that the receptacle current is larger than the threshold value (step S 125; YES), i.e., when the main switch 17 is ON, the water collected in the tank 2 is at or below the threshold level, the main switch 17 indicates the sequential operation mode, and the electric tool connected to the receptacle 32 is in operation, the microcomputer 22 initiates the sequential operation process starting at reference symbol "Cl" shown in FIG. 5C. [0055] On the other hand, when it is determined OFF in step S 122 and it is determined in step S 125 that the receptacle current is smaller than the threshold value, the microcomputer 22 sets the motor 9 OFF to stop the rotation thereof (step S 126).
  • the microcomputer 22 initiates the instruction-standby input scan process SIlO starting at reference symbol "A" in FIG. 5 A.
  • step S 123 When it is determined in step S 123 that the low-level state of the water-level detection signal output from the water level detecting circuit 28 continues for one second or longer, i.e., when water is collected to or above the threshold level in the tank 2, the microcomputer 22 initiates the water-level detection process starting at reference symbol "D" in FIG. 5A.
  • the microcomputer 22 sets the motor 9 ON first (step S131). Accordingly, the dust collector 100 starts dust collection. Then, the microcomputer 22 initiates the sequential-operation input scan process (step S130) starting at reference symbol "Cl". [0057] In the sequential-operation input scan process (step S 130), the microcomputer 22 scans the statuses of the main switch 17, the water level detecting circuit 28, the mode switch 29 and the receptacle current detecting circuit 31. The microcomputer 22 first determines whether the main switch 17 is ON or
  • step S 132 When the main switch 17 is OFF, the microcomputer 22 sets the motor 9 OFF (step S 147), and then initiates the instruction-standby input scan process (step SIlO) starting at reference symbol "A" in FIG. 5 A.
  • step S 132 When it is determined that the main switch 17 is ON (step S 132; ON), the microcomputer 22 determines whether the low-level state of the water-level detection signal output from the water level detecting circuit 28 continues for one second or longer, i.e., whether the electrodes 27a, 27b are soaked in water (step S133).
  • the scheme of checking if the low-level state of the water-level detection signal continues for one second or longer may be the same as employed in the processes of the steps Sl 12 and Sl 13.
  • step S 133 When the low-level state of the water-level detection signal is less than one second (step S 133; NO), the microcomputer 22 discriminates the operation mode indicated by the mode switch 29 (step S 134).
  • the process progresses to the individual-operation input scan process (S 120) starting at reference symbol "Bl".
  • the mode switch 29 indicates the sequential operation mode (step S 134; SEQUENTIAL OPERATION MODE)
  • the process progresses to the step S 135 to determine whether the receptacle current is larger than the threshold value.
  • step S 135 When it is determined in step S 135 that the receptacle current is larger than the threshold value, the process returns to step S 132.
  • a 5-second timer is activated (step S141), after which a 5-second operation input scan process (step S140) starting at reference symbol "C2" is initiated.
  • step S 140 first, it is determined whether the 5-second timer has overflowed, i.e., whether five seconds have passed (step S142).
  • step S 142 When it is determined that the 5-second timer has overflowed (step S 142; YES), the microcomputer 22 sets the motor 9 OFF (step S 147), and then initiates the instruction-standby input scan process (step SIlO) starting at reference symbol "A".
  • step S 142 When it is determined that the 5-second timer does not overflow (step S 142; NO), the microcomputer 22 first determines whether the main switch 17 is ON or OFF (step S 143). When the main switch 17 is OFF, the microcomputer 22 sets the motor 9 OFF (step S 147), and then initiates the instruction-standby input scan process (step SIlO) starting at reference symbol "A".
  • step S 143 When it is determined that the main switch 17 is ON (step S 143; ON), the microcomputer 22 determines whether the low-level state of the output signal of the water level detecting circuit 28 continues for one second or longer, i.e., whether the electrodes 27a, 27b are soaked in water (step S 144).
  • the scheme of checking if such a state continues for one second or longer is similar to the scheme employed in the processes of the steps S112 and S113.
  • step S 144 When the duration of the low-level state of the water-level detection signal is less than one second (step S 144; NO) 5 the microcomputer 22 discriminates the operation mode indicated by the mode switch 29 (step S145).
  • the mode switch 29 indicates the individual operation mode (step S 145; INDIVIDUAL OPERATION MODE)
  • the process progresses to the individual-operation input scan process (step S 120) starting at reference symbol "Bl" in FIG. 5B.
  • step S 145 indicates the sequential operation mode (step S 145; SEQUENTIAL OPERATION MODE)
  • the microcomputer 22 determines whether the receptacle current is larger than the threshold value (step S146).
  • step S 146 When it is determined in step S 146 that the receptacle current is larger than the threshold value (step S 146; YES), i.e., when it is determined that the electric tool connected to the receptacle 32 is in operation, the process goes to the sequential-operation input scan process (step S 130).
  • step S 146 when it is determined that the receptacle current is equal to or smaller than the threshold value, i.e., when it is determined that the electric tool connected to the receptacle 32 is stopped (step S 146; NO), the process returns to step S 142.
  • step S 123 in FIG. 5B and steps S133 and S144 in FIG. 5C i.e., when it is determined that the electrodes 27a, 27b are soaked in water
  • the microcomputer 22 initiates the water-level detection process starting at reference symbol "D" in FIG. 5A and stops the motor 9 through the motor drive circuit 19.
  • step S 152 the microcomputer 22 turns on the alarm indicator 20 (step S 152), and initiates a water-level detection key scan process S 150.
  • the microcomputer 22 repeats the process of detecting the ON/OFF action of the main switch 17 until the OFF state of the main switch 17 is detected (step S 153). After water is collected in the tank 2 and above the threshold value, therefore, the dust collector 100 cannot be operated unless the main switch 17 is turned OFF once. [0064] When detecting that the main switch 17 is turned OFF, the microcomputer 22 turns off the alarm indicator 20 (step S 154), and then initiates instruction-standby input scan process SIlO starting at reference symbol "A".
  • step S131 When the electric tool connected to the receptacle 32 operates with the main switch 17 being ON and the mode switch 29 indicating the sequential operation mode, the motor 9 is set ON (step S131), bringing the dust collector 100 to an operational state. When the operation of the electric tool is stopped thereafter, the motor 9 is stopped after being operated for about 5 seconds (step S 147). [0067] Further, when the low-level state of the water-level detection signal continues for one second or longer with the motor 9 being ON, the motor 9 is set OFF.
  • the motor 9 is set OFF to render the suction unit 7 in a halt state.
  • the alarm indicator 20. is turned on, and the dust collector 100 cannot be brought into an operational state unless the main switch 17 is turned OFF once.
  • main switch 17 is set ON with the water-level detecting electrodes 27a, 27b being soaked in water.
  • the dust collector 100 does not come to an operational state. This prevents occurrence of the state where the repetitive ON/OFF action of the main switch
  • the use of the water level detecting circuit 28 using a pair of electrodes has an advantage of being capable of suppressing occurrence of malfunction originated by dust or the like, over the mechanical water-level detecting system, such as float type detection.
  • Providing a pair of electrodes under the filter can inhibit the filter from being wet with water.
  • the alarm indicator is turned on when the water level in the tank 2 exceeds the threshold value, the user can be informed that collection of water in the tank to an allowable limit is the cause for the halting of the suction unit.
  • the enable/disable determining unit that determines whether the operation of the suction unit is enabled or disabled based on a detection signal from the water level detecting unit is provided, it is possible to adequately determine whether the suction unit should be operated or not according to the detection result from the water level detecting unit.
  • the present invention is not limited to the foregoing embodiment, and can be modified and adapted in various forms.
  • the values specified in the foregoing description of the embodiment are illustrative, and are changeable as needed. For example, it is discriminated that water is collected in the tank 2 to a threshold value or above when the low-level state of the water-level detection signal continues for one second or longer.
  • the sustaining time can be set arbitrarily according to the size or the like of the tank 2.
  • the assumed value, threshold value and so forth of the current flowing between the electrodes 27a and 27b are set adequately according to the size of the tank 2, the applied voltage and the like.
  • the time to stop the motor 9 after an external electric tool connected is stopped is not limited to five seconds, and is optional.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Cleaning In General (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Aspirateur (100) comportant une unité d'aspiration (7) qui aspire de la poussière chargée d'eau, un réservoir (2) qui collecte la poussière aspirée à travers l'orifice d'entrée (3) par l'unité d'aspiration (7), et une unité de détection de niveau d'eau (22, 27a, 27b, 28) (électrodes 27a, 27b) qui détecte le niveau d'eau dans le réservoir (2). Cet aspirateur (100) comprend également une unité de contrôle qui empêche le fonctionnement de l'unité d'aspiration (7) lorsque le niveau d'eau dans le réservoir (2) détecté par l'unité de détection de niveau d'eau (22, 27a, 27b, 28) dépasse une valeur seuil.
PCT/JP2009/051012 2008-01-18 2009-01-16 Aspirateur WO2009091076A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008009693A JP5056431B2 (ja) 2008-01-18 2008-01-18 集塵機
JP2008-009693 2008-01-18

Publications (1)

Publication Number Publication Date
WO2009091076A1 true WO2009091076A1 (fr) 2009-07-23

Family

ID=40568332

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/051012 WO2009091076A1 (fr) 2008-01-18 2009-01-16 Aspirateur

Country Status (2)

Country Link
JP (1) JP5056431B2 (fr)
WO (1) WO2009091076A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2907440A1 (fr) * 2014-02-14 2015-08-19 PROAIR GmbH Gerätebau Aspirateur, en particulier aspirateur à eau, et dispositif destiné à dévier l'électricité statique, en particulier pour être utilisé dans des aspirateurs

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013010567U1 (de) 2012-11-30 2013-12-06 Makita Corporation Staubsammler
JP5988849B2 (ja) * 2012-11-30 2016-09-07 株式会社マキタ 集塵機

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205237A (en) * 1977-12-16 1980-05-27 Nartron Corporation Liquid level sensor, pump system means and circuit means
DE8018091U1 (de) * 1980-07-05 1980-10-16 Rowenta-Werke Gmbh, 6050 Offenbach Naß- und Trockensauger
US6347430B1 (en) * 1996-07-12 2002-02-19 Shop Vac Corporation Self-evacuating vacuum cleaner
GB2400543A (en) * 2000-08-25 2004-10-20 Hoover Co Water level detection and indication in wet suction cleaners
US20060005622A1 (en) * 2004-07-09 2006-01-12 Burdi Roger D Solid state fluid level sensor
WO2007083844A1 (fr) * 2006-01-20 2007-07-26 Hitachi Koki Co., Ltd. Collecteur à poussières pour la détection et l'élimination des poussières du filtre

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05228076A (ja) * 1992-02-21 1993-09-07 Matsushita Electric Ind Co Ltd 乾湿両用掃除機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205237A (en) * 1977-12-16 1980-05-27 Nartron Corporation Liquid level sensor, pump system means and circuit means
DE8018091U1 (de) * 1980-07-05 1980-10-16 Rowenta-Werke Gmbh, 6050 Offenbach Naß- und Trockensauger
US6347430B1 (en) * 1996-07-12 2002-02-19 Shop Vac Corporation Self-evacuating vacuum cleaner
GB2400543A (en) * 2000-08-25 2004-10-20 Hoover Co Water level detection and indication in wet suction cleaners
US20060005622A1 (en) * 2004-07-09 2006-01-12 Burdi Roger D Solid state fluid level sensor
WO2007083844A1 (fr) * 2006-01-20 2007-07-26 Hitachi Koki Co., Ltd. Collecteur à poussières pour la détection et l'élimination des poussières du filtre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2907440A1 (fr) * 2014-02-14 2015-08-19 PROAIR GmbH Gerätebau Aspirateur, en particulier aspirateur à eau, et dispositif destiné à dévier l'électricité statique, en particulier pour être utilisé dans des aspirateurs
CN105188243A (zh) * 2014-02-14 2015-12-23 普罗艾尔机械制造有限公司 吸引设备及用在该吸引设备中的用于导出静电荷的装置
US9526386B2 (en) 2014-02-14 2016-12-27 PROAIR GmbH Gerätebau Vacuum cleaner, particularly wet vacuum cleaner, and device for discharging static charge, particularly for use in vacuum cleaners

Also Published As

Publication number Publication date
JP5056431B2 (ja) 2012-10-24
JP2009165749A (ja) 2009-07-30

Similar Documents

Publication Publication Date Title
TWI329007B (en) Dust collector
EP2047783B1 (fr) Procédé d'isolation électronique sous vide
JP4937356B2 (ja) モータ制御装置、電気掃除機及び手乾燥装置
US7365507B2 (en) Power control apparatus for motor
WO2009091076A1 (fr) Aspirateur
JP2007245019A (ja) 集塵機
JP4747851B2 (ja) 集塵機
TW201722335A (zh) 清潔設備及操作清潔設備之方法
WO2015025470A1 (fr) Aspirateur électrique
JP6668968B2 (ja) 電気掃除機
JP2003164399A (ja) 電気掃除機
CN209186591U (zh) 一种抽洗机电机保护装置
JP4999747B2 (ja) 絶縁異常検知装置および家電機器
JP2007190527A (ja) 集塵機
JP2007190304A (ja) 集塵機
JP2003000503A (ja) 電気掃除機
JP2009165752A (ja) 集塵機
CN113080764A (zh) 一种清洁设备及自清洁方法
CN109602337B (zh) 一种扫地机器人
JP2008099937A (ja) 電気掃除機
JP2009165755A (ja) 集塵機
JP5304215B2 (ja) 電気掃除機
JP2006288593A (ja) 電気掃除機
CN114886341B (zh) 表面清洁设备和应用于控制表面清洁设备的方法
JP2013233058A (ja) 電気機器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09702888

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09702888

Country of ref document: EP

Kind code of ref document: A1