JPH0548685B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an insect killing device for a vacuum cleaner that kills insects (such as mites) present in dust collected in a dust collecting section. .

<Prior art> Conventional vacuum cleaner insecticidal device (mite killing device)
For example, as shown in FIG. 8, a suction hose 1 is used to form a circulation path 5 from the exhaust port 3 of the cleaner body 2 to the intake port 4, and a main motor 6 is driven to supply air to the circulation path 5. By generating a flow and using the exhaust heat of the main motor 6 generated at this time, the temperature of the air is raised (about 50°C), and the dust present in the dust collected in the dust collecting section 7 is raised. It was killing ticks, etc.

<Problems to be Solved by the Invention> In the above-mentioned conventional technology, the exhaust heat of the main motor is used to raise the temperature of the dust, but since the heat capacity of the main motor is extremely large,
The problem is that it takes a long time (3 to 5 minutes) for the dust to reach the temperature that kills dust mites (approximately 50°C). Particularly when the indoor temperature is low, such as during winter, it takes an extremely long time to reach the required temperature due to heat radiation from the suction hose in the circulation path. Furthermore, since the main motor is operated at maximum power during this period, there is a problem that the life of the main motor is shortened due to long-term use.

Therefore, the present invention can reliably kill dust mites and the like in a short period of time, prevent the life of the main motor from shortening, and furthermore, prevent a large amount of dust from being collected in the dust collecting section, which increases the airflow rate. becomes smaller and can reliably prevent the hot air from becoming too hot.
Furthermore, the object of the present invention is to provide an insect killing device for a vacuum cleaner that can add an insect killing function without changing the design of a conventional model.

<Means for solving the problems> The means for solving the problems according to the present invention are shown in FIGS. 1 to 7.
As shown in the figure, in the main body of the insecticidal device, which is detachably attached to the intake port 13 of the vacuum cleaner main body 12 and blows hot air to the dust collection part 23 in the vacuum cleaner main body 12 to kill mites in the dust collection part 23, It has a heater 17 that generates the hot air and a temperature sensing part 22a with a large heat capacity, and when the hot air from the heater 17 reaches a predetermined temperature, the heater 17
a first thermostat 22 that interrupts the energization of the
A temperature sensing portion having a smaller heat capacity than the temperature sensing portion 22a, and controlling the heating capacity of the heater 17 from large to small when the hot air from the heater 17 reaches a predetermined temperature. It has two thermostats 49.

<Function> In the above problem solving means, when the heater 17 and the main motor of the vacuum cleaner body 12 are driven after inserting the insertion tube part 14 of the insecticide device into the intake port 13 of the vacuum cleaner body 12, the insecticide device body An air flow is formed from the air intake hole 15 of No. 11 to the exhaust port of the cleaner body 12 via the ventilation path 16, the exhaust side opening of the insertion tube portion 14, the dust collection portion of the cleaner body 12, and the main motor. Then, the air heated by the heater 17 in the ventilation passage 16 raises the temperature of the dust collected in the dust collecting section, and reliably kills mites and the like in the dust in a short time.

In addition, since the insecticidal operation is completed in a short time, it is possible to prevent the life of the main motor from being shortened.
Since the amount of dust in the vacuum cleaner body 12 is accurately detected and the heating capacity of the heater 17 is quickly controlled accordingly, damage to the parts inside the vacuum cleaner body 12 caused by high-temperature hot air can be prevented, and moreover, the cleaning Since the insertion tube part 14 of the insecticide main body 11 is inserted into the air intake port 13 of the main body 12, the insecticidal function can be added without changing the design of the conventional model.

<Example> Before describing an example of the present invention, the basic structure of the present invention will be described below based on FIGS. 1 to 4. FIG. 1 is a longitudinal cross-sectional view of an insect killing device for a vacuum cleaner showing the basic configuration of the present invention, FIG. 2 is a view showing the same state of use, and FIG. 3 is an electric circuit diagram of the control circuit.

As shown in the figure, the insect killing device of the vacuum cleaner of the present invention includes an insect killing device main body 11, and the insect killing device main body 1.
1 and a plug-in pipe section 14 that is removably fitted into the suction port 13 of the vacuum cleaner main body 12; and a ventilation hole 15 formed on the surface of the insecticide main body 11 that leads to the plug-in pipe section 14. It has a passage 16 and a heater 17 provided within the ventilation passage 16.

As shown in FIG. 1, the insect killing device main body 11 is formed into a substantially cylindrical shape, and the air intake hole 15 consisting of a large number of small holes is bored in one end surface of the insect killing device main body 11. The insertion tube portion 14 is provided protrudingly from the lower surface thereof.

The insertion pipe portion 14 has an outer diameter equal to that of the vacuum cleaner main body 12.
It has a cylindrical shape with the same diameter as the inner diameter of the air intake port 13. Then, the insertion pipe part 14 and the insecticide main body 11
The communication hole 18 is connected to the exhaust side opening 1 of the insertion pipe section 14.
The ventilation passage 16 has a relatively small diameter and is formed in a place that cannot be directly seen from the communication hole 4a, and the cross-sectional area of the ventilation passage 16 is narrowed near the communication hole 18, and the ventilation passage 16 is largely bent in this part.
This is to prevent dust from flowing back to the heater 17 when the vacuum cleaner main body 12 is overturned during use of the insect killing device. This prevents a stick, a finger, etc. from touching the heater 17 even if a stick or finger is inserted thereinto.

The heater 17 is a general nichrome wire heater, and is spirally wound around a bobbin 19 made of a mica plate. The power supply terminal 20 that supplies power to the heater 17 is connected to the insertion tube section 14.
It is provided on the side of the insertion tube section 14 in parallel with the insertion tube section 14,
The vacuum cleaner body 12 at a position corresponding to the power terminal 20
A power supply terminal 21 (FIG. 3) is provided on the side, which is connected to the power supply terminal 20 when the insertion tube section 14 is inserted into the air intake port 13 of the vacuum cleaner main body 12.
Note that the power supply terminal 21 can also be used as a power supply terminal for a power brush provided in a conventional model.

A manually reset type thermostat 22 is disposed in the ventilation passage 16 behind the heater 17 to control the temperature. The thermostat 2
2, when the temperature of the temperature sensing part 22a exceeds a certain value, the continuity between the terminals is cut, and the user presses the return button 2.
The device is configured so that when 2b is pressed, continuity is restored. In addition, the temperature sensing part 22a is made of one with a slightly large heat capacity, and the dust collecting part 22 of the vacuum cleaner main body 12 is
(FIG. 2), the conduction between the terminals is cut off after a delay of a time necessary for the temperature of the collected dust to rise sufficiently.

Originally, this could be done by installing a temperature sensor behind the dust collection part 23 of the vacuum cleaner body 12 to detect whether the temperature of the dust has risen sufficiently, but this would require a design change for each model. , it will no longer be possible to use insecticide devices with conventional models. Therefore, by configuring the insecticidal device as in this embodiment, it becomes possible to use the conventional model without changing the design, and it also becomes possible to sell the insecticidal device as a single unit.

The control circuit 24 for controlling the vacuum cleaner main body 12 and the insecticide main body 11 is composed of a vacuum cleaner main body control circuit 25 and an insecticide control circuit 26, as shown in FIG.
has the function of driving the main motor 28 in a stronger or weaker manner depending on the resistance value of the resistor connected to the control terminal 27. Further, the insecticide control circuit 2
6 is arranged on the upstream side of the heater 17 inside the insecticide main body 11.

The vacuum cleaner main body control circuit 25 includes a diode bridge 29 that rectifies the commercial AC power supply and includes diodes D1 to D4, a Zener diode ZD and a resistor that makes the power rectified by the diode bridge 29 constant voltage. A gate terminal is connected to a series connection body of R1, R2, a resistor R3 and a resistor R4 connected between the resistor R2 and the ground GND, and a connection point between the resistor R3 and the resistor R4. A programmable union transistor (PUT) 30, a capacitor C1 connected between the anode terminal of the PUT 30 and the ground GND, and a primary coil 3 connected between the cathode terminal of the PUT 30 and the ground GND.
1a, a resistor R5 connected in parallel with the primary coil 31a of the pulse transformer 31, and a bidirectional thyristor (triax) 32 connected in series with the main motor 28. A resistor R6 connected in series to the gate terminal of the triac 32, a diode D5 having its anode connected to the resistor R6, and a resistor R7 connected in parallel with the triac 32.
and a series connection body of capacitor C2. The secondary coil 3 of the pulse transformer 31
1b is connected between the cathode terminal of the diode D5 and the ground GND, and is also connected to the PUT
The control terminals 27 are drawn out from the anode terminal 30 and the connection point between the resistors R2 and R3, respectively.

The control terminal 27 is connected to the air intake port 1 of the vacuum cleaner body 12.
The power supply terminal 21 is disposed on the side of the power supply terminal 3 along with the power supply terminal 21. The control terminal 27 is connected to a variable resistor 33 provided in an operating section (not shown) of the suction pipe during normal use.

The insecticide control circuit 26 is connected to the power supply terminal 2.
The heater 17, the thermostat 22, and the temperature fuse 34 are connected in series between the heater 17 and the thermostat 22; a diode bridge 35 consisting of diodes D6 to D9 connected between the other end and the connection point of the heater 17 and the power supply terminal 20;
5, a resistor R10 connected in series to the secondary side light receiving element 36b of the phototriac 36, and a resistor R10 connected to the control terminal 27 in series. and an output terminal 37 to be connected. The resistor R10 is set to a value equal to the resistance value required to drive the main motor 28 weakly. Further, the output terminal 37 is arranged on the lower surface of the insect killing device main body 11 along with the power terminal 20.

In Fig. 2, 38 is a paper bag disposed in the dust collecting section 23 to collect dust, 39 is a paper filter box, 40 is a vibration-proof rubber that supports the main motor, 41 is an exhaust port, 4
2 is a wheel.

In the above configuration, when the insertion pipe part 14 of the insecticide device is inserted into the intake port 13 of the vacuum cleaner main body 12 and the user presses the return button 22b of the thermostat 22, power is supplied to the heater 17 and it generates heat. At the same time, the control terminals 27 are electrically connected at the resistance value of the resistor R10, and the main motor 28 is weakly driven. Then, the ventilation passage 1 is opened from the intake hole 15 of the insecticide main body 11.
6. An air flow is formed that passes through the exhaust side opening 14a of the insertion pipe section 14, the dust collecting section 23 of the vacuum cleaner main body 12, the main motor 28, and reaches the exhaust port 41 of the vacuum cleaner main body 12, and the heater in the ventilation path 16 The air heated in step 17 increases the temperature of the dust collected in the dust collecting section 23, and kills mites and the like in the dust.

Then, when the temperature of the dust rises to an appropriate value, the temperature sensor 22a reaches the set temperature, the thermostat 22 is turned off, the power supply to the heater 17 is cut off, and the photo-trial 36 is turned off.
is turned off, and the driving of the main motor 28 is stopped.

Next, another embodiment which is the basis of the present invention will be described based on the electric circuit diagram of FIG.

In the control circuit 24 of the first embodiment, the heater 1
7, a heater with large power consumption is used, and since it is necessary to suppress the overall load current to below the allowable current in the power supply mode, the main motor 28 is driven weakly when the insecticide device is driven.

However, if a malfunction occurs due to a lightning surge or the like, the main motor 28 will be strongly driven, and a current exceeding the specified amount may flow through the power cord, causing the temperature to rise. Similarly, an overcurrent safety device 44 is connected in series with the power cord 43.
is provided to prevent overcurrent from flowing.

The overcurrent safety device 44 includes a resistor R11 having a relatively small resistance value, and a manual reset type second thermostat 45 disposed close to the resistor R11.

The other configurations are the same as those shown in FIGS. 1 to 3, and the same functional parts are given the same numbers.

In the above configuration, if a malfunction occurs for some reason during driving of the heater 17 and the main motor 28 is strongly driven, the resistor R11
A large current flows to simultaneously drive the heater 17 and the main motor 28, generating heat, turning off the second thermostat 45 and forcibly stopping the driving of the heater 17 and the main motor 28.

Therefore, overcurrent can be prevented from flowing through the power cord, improving safety.

Next, one embodiment of the present invention will be described based on FIGS. 5 to 7. FIG. 5 is a longitudinal cross-sectional view showing the insect killing device of the vacuum cleaner of this embodiment, FIG. 6 is a vertical cross-sectional view of the vicinity of the third thermostat, and FIG. 7 is an electric circuit diagram of the vicinity of the heater.

In the vacuum cleaner insecticide device shown in FIGS. 1 to 3, when the outside temperature is high, the surrounding area becomes high temperature before the thermostat (first thermostat) 22 attached to the insecticide device main body 11 reaches the set temperature. As a result, the resin forming the insecticide device body 11 may be deformed, but in this example,
This is prevented by controlling the amount of heat generated by the heater 17 depending on the outside temperature.

That is, in this embodiment, the heater 17 is
As shown in FIG. 7, the first heater 47 is connected in series.
It also comprises a second heater 48, and a third thermostat 49 which is connected in parallel with the second heater 48 and whose terminals are electrically connected when the temperature sensing section reaches a set temperature or higher.

Then, as shown in Figure 6, the third thermostat 4
The terminals 49a and 49b of 9 are fixed to the bobbin 19 with eyelets 50 and 51, respectively, and a lead wire 52 connected to the connection point of the first heater 47 and the second heater 48 is crimped to one eyelet 50. A lead wire 53 connected to one end of the second heater 48 and the temperature fuse 34 is crimped to the other eyelet 51 .

The other configurations are the same as those shown in FIGS. 1 to 3, and the same functional parts are given the same numbers.

When the outside temperature is low, the third thermostat 49 is conductive, and current flows only to the first heater 47, increasing the amount of heat generated. When the outside temperature is high, the third thermostat 49 is disconnected. Current flows through the first heater 47 and the second heater 48, and the amount of heat generated becomes small. Therefore, even when the outside temperature is high, the insecticidal operation can be performed safely, and at the same time, it is possible to save energy.

In addition, when a large amount of dust is collected in the dust collection section 23 and the air volume is small, the temperature inside the insecticide main body 11 rises rapidly, but at this time the first thermostat 22 reaches the set temperature and is disconnected. The third thermostat 49 reaches the set temperature and becomes conductive before the temperature reaches the set point, and the amount of heat generated becomes small, so that the insecticidal operation can be performed safely.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, the insect killing device of the present invention may be used to exterminate insects other than mites. Further, the ventilation passage 16 may be formed in a straight line without being bent, and a ceramic heater or the like may be used as the heater 17. In addition, a power cord independent of the vacuum cleaner body 12 is provided as a power supply terminal for the heater 17, and the user plugs the power cord into an outlet and simultaneously operates a switch on the vacuum cleaner body 12 to turn on the main motor 2.
If the insect killing operation is performed by driving the air inlet 8, it is possible to use a model in which a power supply terminal is not provided on the side of the air intake port 13.

<Effects of the Invention> As is clear from the above description, according to the present invention, the hot air is removably attached to the air intake port of the vacuum cleaner body, and the hot air is ventilated to the dust collection part in the vacuum cleaner body, and the air inside the dust collection part is heated. The main body of the insecticidal device for killing mites includes a heater that generates the hot air and a temperature sensing part with a large heat capacity, and cuts off electricity to the heater when the hot air from the heater reaches a predetermined temperature. It has a first thermostat and a temperature sensing part with a smaller heat capacity than the temperature sensing part, and when the hot air from the heater reaches a predetermined temperature, the heating capacity of the heater is changed from large to small. The air heated by the heater in the ventilation passage raises the temperature of the dust collected in the dust collection section, ensuring that the dust is removed in a short time. It is possible to kill dust mites, etc. inside, and because the insecticidal action is completed in a short time, the life of the main motor can be prevented from being shortened. Furthermore, the second thermostat can control the amount of dust in the dust collection section. Since it accurately detects the heating capacity of the heater and quickly controls the heating capacity accordingly, it is possible to prevent damage to the parts inside the vacuum cleaner body due to high-temperature hot air, and also prevents damage to the parts inside the vacuum cleaner body due to high temperature hot air. Since the device is used by inserting the plug-in tube of the insecticide device into the mouth, it has the advantage of being able to add an insecticidal function without changing the design of conventional models.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of an insecticidal device for a vacuum cleaner showing the basic configuration of the present invention, Fig. 2 is a view showing the same state of use, Fig. 3 is an electric circuit diagram of the control circuit, and Fig. 4 5 is an electric circuit diagram showing another embodiment of the basic configuration of the present invention, FIG. 5 is a longitudinal sectional view showing an insect killing device for a vacuum cleaner according to an embodiment of the present invention, and FIG.
The figure is also a longitudinal cross-sectional view of the vicinity of the thermostat, No. 7
The same figure is an electric circuit diagram near the heater, and FIG. 8 is a cross-sectional view showing a conventional insect killing device for a vacuum cleaner. 11: Insect killing device main body, 12: Vacuum cleaner main body, 1
3: Intake port, 14: Plug-in pipe section, 15: Intake hole, 1
6: Ventilation duct, 17: Heater, 18: Communication hole, 2
0: Power terminal, 22: Thermostat, 22a:
Temperature sensing part, 22b: Return button, 25: Vacuum cleaner main body control circuit, 26: Insect killer control circuit, 27: Control terminal, 28: Main motor.

Claims (1)

[Scope of Claims] 1. In an insecticidal device main body that is detachably attached to an intake port of a vacuum cleaner main body and blows hot air to a dust collection section in the vacuum cleaner main body to kill mites in the dust collection section, the hot air a first thermostat that has a temperature-sensing section with a large heat capacity and shuts off electricity to the heater when the hot air from the heater reaches a predetermined temperature; and the temperature-sensing section. and a second thermostat that has a temperature sensing part with a small heat capacity compared to that of the heater, and controls the heating capacity of the heater from large to small when the hot air from the heater reaches a predetermined temperature. An insect killing device for a vacuum cleaner characterized by: