JPH0741010B2 - Vacuum cleaner insecticide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an electric vacuum cleaner for killing insects (including microorganisms and various bacteria) such as mites present in the dust collected in the dust collecting section. It relates to an insecticidal device.

<Prior Art> Some conventional insecticidal devices for electric vacuum cleaners are used by inserting an intake port of the cleaner main body. This is, as shown in FIG. 5, an insecticidal device main body 11 and an insertion pipe portion 14 which is connected to the insecticidal device main body 11 and is detachably fitted into an intake port 13 of a cleaner body 12.
A ventilation passage 16 extending from an intake hole as an intake portion 15 formed on the surface of the insecticidal device body 11 to the insertion pipe portion 14, and heating as insecticidal heating means 17 provided in the ventilation passage 16. It has a container.

A manual resetting thermostat 18 for temperature control is provided in the ventilation passage 16 behind the heater 17. The thermostat 18 is configured such that when the temperature of the temperature sensing part 18a exceeds a certain value, the conduction between the terminals is cut off and the heater 17 is stopped, and the conduction is restored when the user presses the return button 18b. It was done.

In the figure, 19 is a communication hole between the insecticidal device body 11 and the insertion tube portion 14, 20 is a bobbin, and 22 is a power supply terminal.

<Problems to be Solved by the Invention> In the above conventional technique, when the temperature of the outside air is very high,
The temperature of the intake air from the intake hole 15 is also high, the temperature of the air that has passed through the heater 17 is high, and the operation of the thermostat 18 is quick, so the temperature of the dust in the dust collection chamber on the main body of the vacuum cleaner is free from dust and the like. There is a problem that the operation may stop before the temperature becomes sufficiently high (about 50 ° C. or more) to kill it.

Also, when the outside air temperature is low (10 ° C or lower) such as in a cold region, the temperature of the air passing through the heater 17 becomes low, the operation of the thermostat 18 becomes slow, and it will not be cut off forever. Even though the temperature of dust is high enough to kill ticks and the like, the operation does not stop for a long time, which is economically disadvantageous.

In view of the above, the present invention is capable of heating the dust temperature to a temperature high enough to kill ticks and the like under any condition, and the heating time of the vacuum cleaner can be varied depending on the outside air temperature. The purpose is to provide a device.

<Means for Solving Problems> The means for solving problems according to the present invention is, as shown in FIGS. 1 to 4, an insecticide for killing insects such as mites present in the dust collected in the dust collecting portion. An electric vacuum cleaner in which the device is attachable to and detachable from the main body of the vacuum cleaner is provided with an insecticidal heating means arranged separately from the main motor in the ventilation path from the intake section to the dust collecting section, and the heating time for the insecticidal heating means is set. A control timer circuit is provided, and the timer circuit is provided with an outside air temperature correction means for changing the length of the set time according to the level of the outside air temperature.

<Operation> In the above problem solving means, when the insecticidal heating means 17 and the main electric motor 28 are driven, an air flow is formed from the intake portion 15 to the dust collecting portion 23 and the main electric motor 28 to the exhaust port. Then, the air heated by the insecticidal heating means 17 in the ventilation passage 16 raises the temperature of the dust collected in the dust collecting portion 23, and can surely kill the mites and the like in the dust in a short time. it can.

At this time, since the timer circuit 35 controls the heating time by the thermistor TC1 and the correction resistor RC1 of the temperature correction means 39 after the driving of the insecticidal heating means 17 is started, it is short at high temperature and slightly longer at low temperature. It can be heated to raise the temperature inside the paper bag to the temperature at which the mites die.

<Examples> One example of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a block diagram of an insecticidal device for an electric vacuum cleaner showing an embodiment of the present invention, FIG. 2 (a) is an electric circuit diagram of a vacuum cleaner body control circuit, and FIG. 2 (b) is also an insecticidal device. An electric circuit diagram of the control circuit, FIG. 3 is a vertical sectional view of the insecticidal device of the electric vacuum cleaner, and FIG. In this embodiment, the same functional parts as those of the prior art shown in FIG.

Then, as shown in the figure, the insecticidal device for the electric vacuum cleaner according to the present invention, in the electric vacuum cleaner having the dust collecting part 23, has an intake part 15
An insecticidal heating means 17 arranged separately from the main electric motor 28 is provided in the ventilation path 16 from the dust collecting section 23 to the dust collecting portion 23, and a heating time controlling timer circuit 35 of the insecticidal heating means 17 is provided.

First, the overall configuration of the insecticidal device for an electric vacuum cleaner according to this embodiment will be described with reference to FIG.

The insecticidal device of the electric vacuum cleaner according to the present embodiment includes the insecticidal device main body 11
And the insecticidal device body 11 is contacted and the suction port 13 of the cleaner body 12
(FIG. 4) An insert pipe portion 14 which is detachably fitted in the inside, and an air passage 16 extending from an intake hole as an intake portion 15 formed on the surface of the insecticidal device body 11 to the insert pipe portion 14. A heater serving as an insecticidal heating means 17 provided in the ventilation passage 16 is provided.

The insecticidal device main body 11 is formed in a substantially cylindrical shape, and the intake hole 15 composed of a large number of small holes is formed in one end surface thereof. Then, the insertion pipe portion 14 is provided on the lower surface of the insecticidal device body 11 so as to project therefrom.

The insertion pipe portion 14 has a cylindrical shape whose outer diameter is the same as the inner diameter of the intake port 13 of the cleaner body 12. And the insertion pipe part
The communication hole 19 between the body 14 and the insecticidal device body 11 is of a relatively small diameter formed in a place where it cannot be directly sighted from the exhaust side opening 14a of the insertion tube portion 14, and the ventilation passage 16 near the communication hole 19 is formed.
The cross-sectional area of the
16 is greatly bent. This is to prevent dust from flowing back to the heater 17 when the cleaner body 12 is overturned during use of the insecticidal device, and at the same time,
When a rod, a finger or the like is inserted from the exhaust side opening 14a of the insertion tube portion 14, these are prevented from touching the heater 17.

The heating unit 17 is a general nichrome wire heater, and is spirally wound around a bobbin 20 formed of a mica plate. The power is supplied by fitting the power supply terminal 21 (FIG. 2 (a)) provided in the vicinity of the intake port 13 to the power supply terminal 22 projecting from the side of the insertion tube portion 14. To be done.

Next, the control circuit 24 for controlling the cleaner body 12 and the insecticidal device body 11 will be described.

The control circuit 24, as shown in FIG.
And the insecticidal device control circuit 26, the cleaner main body control circuit 25 is arranged inside the cleaner main body 12, and the main motor depends on the resistance value of the resistor connected to the control terminal 27.
It has the function of driving 28 strongly. Further, the insecticidal device control circuit 26 is arranged inside the insecticidal device main body 11 on the upstream side of the heater 17.

Then, as shown in FIG. 2 (a), the cleaner body control circuit 25 rectifies the commercial AC power supply AC and determines the diode bridge 29 composed of the diodes D1 to D4 and the power supply rectified by the diode bridge 29. A Zener diode ZD1 and a resistor R1, R2 that are turned into a voltage, and a series connection body of a resistor R3 and a resistor R4 connected between the resistor R2 and the ground GND,
A programmable unity junction transistor (PUT) 30 having a gate terminal connected to a connection point between the resistor R3 and the resistor R4, an anode terminal of the PUT 30 and a ground GND.
A capacitor C1 connected between the pulse transformer 31 and a primary side coil 31a between the cathode terminal of the PUT 30 and the ground GND, and a primary side coil 31a connected in parallel with the pulse transformer 31. Resistor R5, a gate-controlled bidirectional thyristor (triac) 32 connected in series with the main motor 28, a resistor R6 connected in series with the gate terminal of the triac 32, and the resistor R6. The diode D5 whose anode side is connected to
It is composed of a resistor R7 connected in parallel with 32 and a capacitor C2 connected in series. The secondary coil 31b of the pulse transformer 31 is connected between the cathode terminal of the diode D5 and the ground GND, and the anode terminal of the PUT 30 and the connection point between the resistor R2 and the resistor R3. The respective control terminals 27 are drawn out.

The control terminal 27 is disposed on the side of the intake port 13 of the cleaner body 12 and on the side opposite to the power supply terminal 21. The control terminal 27 is connected to a variable resistor 33 provided in an operating portion (not shown) of the suction pipe during normal use.

As shown in FIG. 1, the insecticidal device control circuit 26 includes the timer circuit 35, the driving circuit 36 for the heater 17, and the timer circuit 35.
Power supply circuit 37 and a circuit 38 for weakly driving the main power supply 28
The timer circuit 35 is provided with a temperature correction means 39 for changing the set time according to the outside air temperature.

As shown in FIG. 2B, the power supply circuit 37 of the timer circuit 35 includes a diode D11 having a cathode terminal connected to one side 22a of the power supply terminal 22 and a resistor having one end connected to an anode terminal of the diode D11. R11, an NPN transistor Q11 having an emitter terminal connected to the other end of the resistor R11, a PNP transistor having a collector terminal connected to the base terminal of the transistor Q11 and an emitter terminal connected to the collector terminal of the transistor Q11 Transistor Q12 and the transistor Q12
Resistor R12 connected between the base terminal of transistor Q11 and the emitter terminal of transistor Q11, and zener diode ZD11 whose anode terminal is connected to the base terminal of transistor Q12.
And an electrolytic capacitor C11 whose negative terminal is connected to the collector terminal of the transistor Q11. The cathode terminal of the Zener diode ZD11 and the positive terminal of the capacitor C11 are connected to the other 22b of the power supply terminals 22. Then, the power supply circuit 37 extracts a stabilized DC voltage in which the positive terminal of the capacitor C11 is positive and the negative terminal is negative.

The temperature correction means 39 is composed of a parallel connection body of a thermistor TC1 and a correction resistor RC1.

The timer circuit 35 includes a resistor R13 having one end connected to the plus side of the power supply circuit 37 through a parallel connection body of the thermistor TC1 and the correction resistor RC1, and the other end of the resistor R13 and the power supply circuit. Resistor connected between minus side of 37
R14, an electrolytic capacitor C12 whose positive side terminal is connected to the positive side of the power supply circuit 37, and a resistor R15 connected between the negative side terminal of the capacitor C12 and the negative side of the power supply circuit 37,
PNP with the emitter terminal connected to the positive terminal of capacitor C12 and the collector terminal connected to the negative terminal of capacitor C12
Type transistor Q13, a diode D12 having a cathode terminal connected to the collector terminal of the transistor Q13 and an anode terminal connected to the negative side of the power supply circuit 37, and a resistor R16 having one end connected to the base terminal of the transistor Q13.
And a capacitor C13 connected between the other end of the resistor R16 and the negative side of the power supply circuit 37, and a negative logic side input terminal at the connection point between the capacitor C12 and the resistor R15 via the resistor R17. Operational amplifier 4 whose positive logic side input terminal is connected to the connection point between resistors R13 and 14 via resistor R18
0, and a resistor R19 connected between the output terminal of the operational amplifier 40 and the connection point of the resistor R13 and the resistor R14.

The resistors R13 and R14 are resistors for setting the reference potential, the capacitor C12 is a timer on-time setting capacitor, and the resistors R17, R18 and R19 are non-inverters of the operational amplifier 40. It is a resistor for amplification. Also, transistor Q13, diode D12, capacitor C13
The resistor R16 is a reset circuit for discharging the capacitor C12.

The drive circuit 36 of the heater 17, the first terminal is connected to one end 22b of the heater 17 the second terminal is connected to one of the power supply terminal 22 22b of the main triac 41, the first terminal of the triac 41. A resistor R20 connected at one end, an auxiliary triac 42 having a first terminal connected to the other end of the resistor R20 and a second terminal connected to the gate terminal of the triac 41, and a second terminal of the triac 42. Between the resistor R21 connected to one side 22b of the power supply terminal 22, the diode D13 whose anode terminal is connected to the gate terminal of the triac 42, and the cathode terminal of the diode D13 and the output terminal of the operational amplifier 40. A resistor R22 connected, a resistor R23 having one end connected to the first terminal of the triac 41, and a capacitor C14 connected between the resistor R23 and the second terminal of the triac 41.
It consists of and. The other end of the heater 17 is connected to the other 22a of the power supply terminal 22. The resistors R20 and R21 are the gate current limiting resistors of the triac 41, the resistor R22 is the gate current limiting resistor of the triac 42, and the resistor R23 and the capacitor C14 are the noise of the triac 41. Configure a CR absorber for absorption.

The circuit 38 for weakly driving the main motor 28 includes a light emitting element.
A phototriac 43 whose cathode terminal is connected to the output terminal of the operational amplifier 40, and a phototriac 43
A resistor R24 connected between the onode terminal of the light emitting element 43a and the positive side of the power supply circuit 37, and a photo triac 4
Resistor R2 whose one end is connected to the first terminal of the light receiving element 43b of 3
It consists of 5 and. The resistor R24 is a resistor for protecting the light emitting element of the phototriac 43. Further, the other end of the resistor R25 and the second terminal of the light receiving element 43b of the phototriac 43 become an output terminal 44 and are detachably connected to the control terminal 27 of the electric vacuum cleaner body 12. At this time, the resistance value of the resistor R25 is
It is set to a value equal to the resistance value required for weakly driving the main motor 28.

In FIG. 4, 45 is a paper bag that is placed in the dust collecting part 23 to collect dust, 46 is a paper box, 47 is a rubber vibration isolator that supports the main motor 28, 48 is an exhaust port, and 49 is a wheel. .

In the above structure, the insertion tube portion 14 of the insecticidal device is attached to the cleaner body.
Power supply terminal 21 and power terminal
22 are connected to each other, and the DC power stabilized by the power supply circuit 37 is supplied to the timer circuit 35. Then, the transistor Q1
3 is conducted only for a few microseconds, the capacitor C12 is discharged, the potential of the negative logic side input terminal of the operational amplifier 40 rises, and the potential of the output terminal of the operational amplifier 40 becomes zero volts.

Then, the triac 41 is brought into conduction, power is supplied to the heater 17, and heat is generated. At the same time, resistor R25 is connected between control terminals 27.
The main motor 28 is weakly driven by conducting with the resistance value of. Then, from the air intake hole 15 of the main body 11 of the insecticidal device to the ventilation passage 16 and the insertion pipe portion.
An air flow is formed from the exhaust side opening 14a of 14 to the dust collecting portion 23 of the cleaner body 12 and the main motor 28 to the exhaust port 41 of the cleaner body 12, and is heated by the heater 17 in the ventilation hole 16. The air raises the temperature of the dust collected in the dust collecting portion 23 and kills the mites and the like in the dust. That is, since the temperature correction means 39 determines the preset time of the timer circuit 35 according to the external temperature taken in by the intake section 15 formed on the surface of the insecticidal device body 11 in advance, the temperature of the dust has an appropriate value. When the timer circuit 35 reaches the set time (for example, 1 minute), the triac 41 is turned off, the power supply to the heater 17 is cut off, and the phototriac 43 is turned off, and the main motor is turned on. 28 is stopped.

As described above, the insecticidal device of the present invention is different from the conventional case where the heater is turned on and off by the thermostat,
The timer circuit 35 guarantees heating for a predetermined time and controls the heating time according to changes in the outside temperature, so when the room temperature is high, the ticks die in the paper bag in a short time. The set time can be extended until the temperature reaches the set temperature, and the temperature inside the paper bag can always be controlled to the set temperature.

<Effects of the Invention> As is apparent from the above description, according to the present invention, an electric device in which the insecticidal device for killing insects such as mites present in the dust collected in the dust collecting portion can be attached to and detached from the cleaner body. In the vacuum cleaner, an insecticidal heating means arranged separately from the main electric motor is provided in the ventilation path from the intake portion to the dust collecting portion, and the insecticidal heating means is provided with a timer circuit for heating time control. In addition, an outside air temperature correction cormorant that changes the length of the set time depending on the outside air temperature is attached, and unlike the conventional case where the heater is turned on and off by a thermostat, a predetermined time is set by the timer circuit. The time guarantees heating, and since the heating time is controlled according to changes in the outside temperature, it is set for a short time when the room temperature is high, and until the temperature inside the paper bag is a temperature that kills mites when the heart sound is low. Time This has the effect of extending the time interval and controlling the temperature inside the paper bag to always be at the set temperature.

[Brief description of drawings]

FIG. 1 is a block diagram of an insecticidal device for an electric vacuum cleaner showing an embodiment of the present invention, FIG. 2 (a) is an electric circuit diagram of a vacuum cleaner body control circuit, and FIG. 2 (b) is also an insecticidal device. An electric circuit diagram of the control circuit, FIG. 3 is a vertical sectional view of the insecticidal device of the vacuum cleaner, and FIG.
FIG. 5 is a vertical sectional view of a conventional insecticidal device for an electric vacuum cleaner. 11: insecticidal device main body, 12: vacuum cleaner main body, 13: intake port, 14: insertion pipe part, 15: intake part, 16: ventilation passage, 17: insecticidal heating means, 23:
Dust collector, 24: Control circuit, 25: Vacuum cleaner body control circuit, 26: Insecticidal device control circuit, 28: Main motor, 35: Timer circuit, 36:
Heater drive circuit, 37: power supply circuit, 39: temperature correction means.

Claims (1)

[Claims] 1. An electric vacuum cleaner in which an insecticidal device for killing insects such as mites present in dust collected in a dust collecting portion can be attached to and detached from a cleaner body, and ventilation is provided from an air intake portion to the dust collecting portion. The insecticidal heating means disposed separately from the main electric motor is provided in the road, and the insecticidal heating means is provided with a heating time controlling timer circuit. An insecticidal device for an electric vacuum cleaner, which is provided with an outside air temperature correction means for changing the temperature according to the above.