JPH11103748A - Volatilizer for chemical or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a volatilizer for a chemical or the like capable of stably volatilizing the chemical or the like and efficiently utilizing the chemical or the like by installing a means for controlling the rotational frequency of a motor. SOLUTION: This volatilizer for a chemical or the like is obtained by installing a means for controlling the rotational frequency of a motor in the volatilizer for the chemical or the like capable of making an air current flow with a fan rotated by the motor for a material, capable of being impregnated and impregnated with a volatile agent such as the chemical and volatilizing the volatile agent. Furthermore, the means for controlling the rotational frequency of the motor is capable of preferably detecting the outside air temperature and controlling the rotational frequency of the motor in the direction to suppress the fluctuation of the volatilized amount per unit time for the fluctuation of the outside air temperature or detecting the voltage of a power source and controlling the rotational frequency of the motor in the direction to suppress the fluctuation of the rotational frequency of the motor for the fluctuation of the voltage of the power source or reducing the rotational frequency of the motor after the passage of a prescribed time from the start of the driving of the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for volatilizing chemicals, fragrances, deodorants and the like using a fan. Hereinafter, a case where the present invention vaporizes a drug will be described.

[0002]

2. Description of the Related Art An insecticide in which a fan is used to blow air toward a medicine to volatilize the medicine is disclosed in Japanese Utility Model Application Laid-Open No. 61-182.
No. 273 has a hole having a gas rectifying function,
Japanese Unexamined Patent Publication (Kokai) No. 7-111850 discloses an impregnating material in which a volatile insecticide / insect repellent is impregnated and a fan used to volatilize the insect repellent / insect repellent.

[0003]

However, pesticides for controlling pests such as mosquitoes, flies, cockroaches, etc., have a constant concentration of pesticides in the atmosphere due to the size of the room used and the influence of wind. And the effect changes greatly. In the conventional device, if the surrounding environment is constant, the amount of the insecticide volatilized per unit time is constant, so that an appropriate effect is not always obtained. This applies not only to insecticides but also to other volatile agents such as fragrances and deodorants.

[0004] Further, in such a conventional device for volatilizing chemicals and the like, even if the amount of air blown by a fan is constant, the volatilization amount of the chemicals and the like per unit time is greatly affected by the outside air temperature. Found by experiment. For example, under certain conditions, when the outside air temperature is 25 ° C to 30 ° C
, The volatilization increases about twice,
The use period of the impregnating material impregnated with the drug is halved. Conversely, as the outside air temperature decreases, the volatilization amount of a drug or the like per unit time decreases, so that the effect of the drug decreases.

When the motor of the fan is driven by a battery, the number of revolutions of the fan fluctuates in accordance with the fluctuation of the power supply voltage.

[0006] In addition to the problem of fluctuations in the outside air temperature and the power supply voltage, in general, the concentration of a drug or the like in a room gradually increases after the start of use of the device in the room, but the medicinal effect is not sufficient. After appearing, the drug concentration in the room may remain high. As a result, the drug could not be used efficiently.

A first object of the present invention is to provide a device for volatilizing a drug or the like which can control the amount of the drug or the like volatilized per unit time.

A second object of the present invention is to provide a device for volatilizing a drug or the like capable of stably volatilizing a drug or the like without being affected by the outside air temperature.

A third object of the present invention is to provide a device for volatilizing a drug or the like which stably volatilizes the drug or the like irrespective of fluctuations in the power supply voltage.

A fourth object of the present invention is to provide a volatilization device which can rapidly increase the concentration of a drug or the like in a predetermined space such as a room, and can efficiently use the drug or the like.

[0011]

According to the first aspect of the present invention, an airflow is caused to flow by a fan rotated by a motor over an impregnating material impregnated with a volatilizing agent such as a chemical, so that the volatilizing agent is removed. A device for controlling the number of rotations of a motor is provided in a device for volatilizing a drug or the like to be volatilized. By controlling the number of rotations of the motor in this way, the amount of air flow from the fan changes, and the amount of volatilization of a drug or the like per unit time is controlled. For example, if the rotation speed of the motor is positively controlled in consideration of the size of the room and the wind and according to the purpose, the insecticide, the fragrance, the deodorant, and the like can be used effectively.

According to a second aspect of the present invention, the rotation speed of the motor is controlled in such a manner that the outside air temperature is detected and the fluctuation of the amount of volatilization per unit time with respect to the fluctuation of the outside air temperature is suppressed. Thereby, even if the outside air temperature fluctuates, the volatilization amount of the drug or the like per unit time is stabilized.

According to a third aspect of the present invention, the power supply voltage is detected, and the rotation speed of the motor is controlled in a direction to suppress the fluctuation of the rotation speed of the motor with respect to the fluctuation of the power supply voltage. Thus, even when the power supply voltage fluctuates, for example, when a battery is used as a power supply, the volatilization amount of a drug or the like per unit time is stabilized.

According to a fourth aspect of the present invention, the rotation speed of the motor is reduced after a predetermined time has elapsed since the start of driving the motor. Thereby, when this device is used in a predetermined space such as a room, the amount of volatilization per unit time is suppressed after the concentration of the drug or the like in the room increases for a predetermined time after the start of driving of the motor, so that there is no waste. The volatilization of drugs and the like is suppressed. In addition, the amount of volatilization of a drug or the like per unit time at a predetermined time after the start of driving of the motor is relatively larger than the amount of volatilization of a drug or the like per unit time after the elapse of the predetermined time. Etc. will rapidly increase.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an insecticidal apparatus according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a schematic sectional view showing the internal structure of the insecticidal apparatus. As shown in the figure, inside the case, a honeycomb-shaped impregnating material impregnated with a volatile insecticide, a propeller fan for blowing the impregnating material, a motor for rotating the propeller fan, A battery and a board constituting a control circuit are housed. A power switch is provided on the board, and the button is projected outside the case. Further, a fan cover is provided between the propeller fan and the impregnating material. The impregnating material is used as a cartridge so that it can be replaced with a used cartridge.

FIG. 2 is a diagram showing the relationship between the outside air temperature, the rotation speed of the motor, and the amount of the insecticide volatilized. In this example, when the rotation speed of the motor is kept constant at 100%, the amount of volatilization per unit time when the outside air temperature is 25 ° C. is 100%.
Then, when the outside air temperature reaches 30 ° C., the amount of volatilization per unit time increases to 200%. Therefore, in this embodiment, when the outside air temperature is Tmp, Tmp ≦
26 ° C, 26 ° C <Tmp ≦ 28 ° C, 28 ° C <T
The number of rotations of the motor is controlled for each of four temperature bands of mp ≦ 30 ° C. and 30 ° C. <Tmp. As a result, the volatilization fluctuation of the insecticide per unit time in an environment with a wide outside air temperature is kept within a certain range.

FIG. 3 is a diagram showing a schematic configuration of the control circuit. In the figure, the temperature detecting unit detects the outside air temperature using a temperature sensor, and selectively turns on one of the switches S1 to S4 according to the temperature zone shown in FIG. Here, the resistances R1, R2 and R3 are R1 <R2 <R3
When the outside air temperature Tmp is Tmp ≦ 26 ° C., the switch S1 is turned on, and 26 ° C. <Tmp ≦ 28 °
When C, switch S2 is turned on, and 28 ° C <Tmp ≦ 3
At 0 ° C, switch S3 is turned on, and 30 ° C <Tmp
At this time, the switch S4 is turned on.

FIG. 4 is a diagram showing a specific configuration example of the control circuit. In the figure, Ro is a positive temperature coefficient thermistor made of a semiconductor ceramic, and an example of the characteristics is shown in FIG. In this embodiment, a resistor having a characteristic whose resistance value greatly changes from 25 ° C. to about 30 ° C. compared to a conventional general positive temperature coefficient thermistor is used. In FIG. 6, the broken line indicates the characteristics of a conventional general positive temperature coefficient thermistor, and the solid line indicates the characteristics of the positive temperature coefficient thermistor used in this embodiment.

In FIG. 4, U1, U2 and U3 are comparators, respectively, and resistors R11, R12, R21, R
Reference voltages 22, 22, R31, and R32 are compared with a divided voltage due to the positive characteristic thermistor Ro and the resistor R10. U4 and U5 are EX-NOR gates, and the input / output truth table is as follows.

[0021]

[Table 1]

The outputs of the EX-NOR gates U4 and U5 are of an open collector type. When the output signal d of U4 is at "L" level, a motor current flows through the resistor R1 'and the output signal e of U5 is output. When the signal is at "L" level, the resistance R2 '
Through which the motor current flows. Further, the comparator U1
Is at "H" level, the FET Q is turned on, and the motor current flows through this Q. When the signals d and e are both at "H" level and Q is in the off state, the resistor R3 '
Only through the motor current flows.

FIG. 5 is a diagram showing the relationship between the outside air temperature and the signals of various parts in FIG. 4, and FIG. 7 is a diagram showing the relationship between the outside air temperature and the rotation speed of the motor obtained thereby. In this way, the rotation speed is controlled between 100% and 50% according to the four temperature zones.

Next, the configuration of the control unit of the insecticidal apparatus according to the second embodiment will be described with reference to FIGS.

FIG. 8 is a block diagram showing the configuration of the control circuit. In the figure, the temperature detector detects the outside air temperature by a temperature sensor, and the power supply voltage detector detects the power supply voltage Vcc. The pulse width control unit comprises a monostable multivibrator, and the timer gives a trigger pulse to the pulse width control unit. The pulse width control unit changes the pulse width according to an output signal from the temperature detection unit, for example, by switching a resistor or a capacitor of the monostable multivibrator. The timer changes the cycle of the trigger pulse given to the pulse width control unit according to the output signal from the power supply voltage detection unit.

FIG. 9 is a diagram showing the relationship between the change in the outside air temperature and the pulse width generated by the pulse width control unit. Assuming that the power supply voltage is constant and the period of the trigger pulse, which is the output signal of the timer, is 10 ms and constant, as shown in FIG.
The pulse width (“L” level width) generated by the pulse width control unit is set to 10 ms, and when the outside air temperature is 30 ° C. or more, the pulse width is set to 5 ms. I try to be shorter. In this way, the number of rotations of the motor M is controlled stepwise according to the temperature range of the outside air temperature.

FIG. 10 is a diagram showing the relationship between the power supply voltage and the output signals of the timer and the pulse width control unit. As described above, the timer, based on the signal from the power supply voltage detection unit, increases the period of the trigger pulse for the pulse width control unit as the power supply voltage increases. In this example, when the power supply voltage is 2.5 V, 1
A trigger pulse is generated at a cycle of 0 ms.
A trigger pulse is generated at a cycle of 16 ms. Therefore, when the outside air temperature is 26 ° C. or lower and the power supply voltage is 2.5 V, the motor is driven at 10 ms out of 10 ms, that is, at a duty ratio of 100%. 16m when is more than 3.0V
The motor is driven in the ON state for 10 ms of s, that is, the on-duty ratio is 62.5%. At an intermediate power supply voltage, the motor is driven at an on-duty ratio corresponding to the value.

Next, the configuration of the control unit of the insecticidal apparatus according to the third embodiment will be described with reference to FIGS.

FIG. 11 is a diagram showing the circuit configuration of the control unit, which basically uses a one-chip microcomputer. In the figure, U10 is a one-chip microcomputer, and has a CPU, a ROM,
It incorporates a RAM, I / O, A / D converter, timer, PWM output circuit, and the like. Analog input terminals AD1, A
D2 is connected to a positive voltage thermistor Ro as a temperature sensor, a resistor voltage dividing circuit including a resistor R40, and a resistor voltage dividing circuit including resistors R41 and R42. LED1 and LED2 are connected to port1 and port2, respectively.
LED1 is a red LED, LED2 is a green LED,
As will be described later, a green LED is displayed during normal operation, and a red LED is lit when the time limit has expired. port3 is FET
The gate of Q is connected, and the FET Q is switched by the output signal of port 3 to control the motor M by PWM. A crystal oscillator or a piezoelectric oscillator X is connected to the terminals X1 and X2, and the one-chip microcomputer internally generates a system clock signal and operates each unit in synchronization with the system clock. A reset switch SW is connected to the Reset terminal. By operating this switch, a program previously written in the ROM inside the one-chip microcomputer U10 is sequentially executed from a predetermined address.

FIGS. 12 and 13 are flowcharts showing the processing procedure of the one-chip microcomputer shown in FIG.
In this embodiment, four timers, timer 1 to timer 4, are used. At least timer 1 and timer 2 are circuit-based timers, and are used to set the cycle and the on-time for PWM control of the motor. . Timers 3 and 4 correspond to predetermined addresses in the RAM.

When the reset switch is operated, FIG.
As shown in (1), first, an initial value is set (n1). This sets 0 to the timer 3 used as an automatic off timer. Subsequently, the value T of the timer 4 used as the integrating timer
It is determined whether or not 4 is a corresponding value of less than 500 hours (n2). As described later, the value of the timer 4 indicates the accumulated use time of the apparatus. If T4 is a value corresponding to 500 hours or more, the process is terminated as it is, and it becomes unusable.
Here, if a new impregnating material (cartridge) impregnated with the insecticide is mounted, the operation clears the RAM in the one-chip microcomputer and configures a circuit so that the value of the timer 4 becomes 0. I have. Therefore, if the reset switch is operated in this state, the process proceeds to the processing after step n3.

If T4 is less than 500 hours, the power supply voltage Vcc is measured (n3). This is performed by the analog signal input of the AD2 terminal shown in FIG. And Vc
It is determined whether or not c exceeds 2.5 V, that is, whether or not the battery voltage is a usable voltage (n4). 2.5V
Is exceeded, a value T1 to be set in the timer 1 is obtained based on a predetermined arithmetic expression (n5). This defines a basic cycle for performing the PWM control according to the power supply voltage. That is, T1 determines the cycle of the on-time + off-time of the FET Q shown in FIG. 11, and the larger the T1, the longer the off-time and the lower the on-duty ratio. In this example, in the equation of T1 = 10 + k1 (Vcc / 2.5-1), k1 = 30, and when Vcc = 2.5V, T1
= 10ms, Vcc = 3.0V, T1 = 16ms
I am trying to be.

Subsequently, the outside air temperature Tmp is measured. This is performed based on the analog input from AD1 shown in FIG. 11 (n6). When the outside air temperature Tmp is 26 ° C. or more and less than 30 ° C., a value T2 to be set in the timer 2 is obtained based on a predetermined arithmetic expression (n7 → n8). Here, T2 = 10 + k
2 (Tmp / 25-1), when Tmp is 28 ° C., if the coefficient k2 in the above equation is determined so that T2 = 7.5 ms, the outside air temperature is 26 ° C. to 30 ° C. T2 is set to a value of 10 ms to 5 ms over the range. When the outside air temperature Tmp is lower than 26 ° C., T2 = 10 ms (n9 → n10), and when the outside air temperature Tmp exceeds 30 ° C., T2 = 5 ms (n11).

Subsequently, as shown in FIG. 13, the operation time is measured (n12). Specifically, timer 3 and timer 4
Is incremented by a constant value. As a result, the values of the timers 3 and 4 gradually increase during operation, and the value of the timer 3 indicates the time since the reset switch was operated this time to start the operation.
Indicates the cumulative time since the cartridge was replaced. In addition to the method of measuring the operation time, a timer for measuring the operation time after reset is provided in the one-chip microcomputer separately from the timer 1 and the timer 2, and the value is read in step n12. The operation time may be measured by a method of integrating the operation time into the timer 3 and the timer 4, respectively.

Subsequently, it is determined whether or not the value T4 of the integration timer is 500 hours or more (n13). Further, it is determined whether or not the value T2 of the automatic off timer is equal to or longer than 12 hours (n14). T4 is less than 500 hours and T3 is 12
If the time is less than the time, the values of T1 and T2 already obtained are set in the timer 1 and the timer 2, respectively (n15 → n1)
6). Thereafter, the PWM output is started to start driving the motor (n17). Thereafter, the in-operation display is performed by turning on the green LED (n18). Thereafter, by repeating the processing of steps n3 to n18, the motor is PWM-controlled according to the power supply voltage and the outside air temperature.

In step n4 shown in FIG. 12, if the power supply voltage is less than 2.5 V, the expiration is displayed by turning on the red LED as shown in FIG. 13 (n19). After a certain period of time, the motor is stopped by stopping the PWM control, and the in-operation display is stopped (n20 → n21).

FIG. 14 is a diagram showing the relationship between the PWM output signal and the on-duty ratio of the motor drive. Thus, the cycle is determined by the value T1 set in the timer 1,
The ON time is determined by the value T2 set in the timer 2.
Therefore, the on-duty ratio is determined by T1 and T2.

Next, a processing procedure of the control unit of the insecticidal apparatus according to the fourth embodiment is shown as a flowchart in FIG. In the fourth embodiment, after one hour from the start of the operation, the volatilization amount of the insecticide per unit time is gradually reduced, so that the entire insecticide can be reduced without decreasing the insecticidal effect. The use amount is suppressed and the usable period is lengthened. The processing content of FIG. 15 is inserted between steps n14 and n15 in FIG. That is, if T3 is equal to or less than the value corresponding to one hour, the correction value dT for T1 is set to 0.
Set to. If T3 is a value corresponding to more than one hour and equal to or less than two hours, the correction value dT is calculated as dT = k3 × T3 × T1, and when T3 exceeds two hours, the correction value dT is set to d.
It is determined as T = k3 × 2 × T1. Then, dT is added to T1 already obtained, and the value is set in the timer 1. Here, k3 is a coefficient that determines the magnitude of the correction amount for T1. As a result, as the time elapses, the period of the motor becomes longer while the ON time remains constant, so that the on-duty ratio decreases and the amount of the insecticide volatilized per unit time decreases.

Next, the configuration of the control unit of the insecticidal apparatus according to the fifth embodiment will be described with reference to FIG. In the fifth embodiment, the current supplied to the motor is analog-controlled. The circuit has the configuration shown in FIG. 11 and incorporates a D / A converter, outputs an analog signal from port 3,
The current supplied to the power supply is analog-controlled by the FET Q. Other configurations are the same as those shown in FIG.

FIG. 16 is a flowchart showing the processing procedure. In the fifth embodiment, since the PWM control is not performed, the processing using the timer 1 and the timer 2, that is, FIG.
2 and steps n5, n7 to n11 in FIG.
There is no processing corresponding to n15 to n17. Steps n31 and n32 in FIG. 16 are newly provided processing.

At step n31 in FIG. 16, a control voltage Vm applied to the gate of the FET Q is obtained as a function of the power supply voltage Vcc and the outside air temperature Tmp, and this is output from port3. The above function assumes that the control voltage Vm increases as the power supply voltage decreases, and the control voltage Vm decreases as the outside air temperature increases. By controlling the current supplied to the motor by this control signal, the volatilization amount of the insecticide per unit time can be kept constant irrespective of changes in the outside air temperature and the power supply voltage. In addition, it is easy to smoothly change the number of rotations of the motor, not stepwise.

[0042]

According to the first aspect of the present invention, the amount of volatilization of a drug or the like per unit time can be controlled by changing the flow rate of an impregnating material impregnated with a volatile agent such as a drug or the like. It becomes possible to volatilize the medicine and the like according to the purpose.

According to the second aspect of the present invention, the volatilization amount of a drug or the like per unit time can be stabilized even if the outside air temperature fluctuates.

According to the third aspect of the present invention, even when the power supply voltage fluctuates, such as when a battery is used as a power supply, the amount of volatilization of a drug or the like per unit time can be stabilized.

According to the fourth aspect of the present invention, when this apparatus is used in a predetermined space such as a room, the concentration of a drug or the like in the room increases for a predetermined time after the start of driving of the motor, and thereafter, the unit is increased. Since the amount of volatilization per hour is suppressed, the volatilization of an excessive drug or the like is suppressed. In addition, the amount of volatilization of a drug or the like per unit time at a predetermined time after the start of driving of the motor is relatively larger than the amount of volatilization of a drug or the like per unit time after the elapse of the predetermined time. Etc. increase rapidly.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing the structure of an insecticidal device according to an embodiment of the present application.

FIG. 2 is a diagram showing the relationship between the number of rotations of a motor and the volatilization amount of a pesticide with respect to the outside air temperature of the apparatus.

FIG. 3 is a block diagram showing a configuration of a control unit of the apparatus.

FIG. 4 is a diagram showing a specific circuit of a control unit of the apparatus.

FIG. 5 is a diagram showing a relationship between signals of respective parts in FIG. 4 and an outside air temperature;

FIG. 6 is a diagram showing characteristics of a positive temperature coefficient thermistor;

FIG. 7 is a diagram showing the relationship between the outside air temperature and the number of rotations of a motor.

FIG. 8 is a block diagram showing a configuration of a control unit of the insecticidal device according to the second embodiment.

FIG. 9 is a waveform diagram of a signal of each part in FIG. 8 in each temperature zone.

FIG. 10 is a waveform diagram of a signal of each unit in FIG. 8 with respect to a fluctuation of a power supply voltage.

FIG. 11 is a diagram showing a configuration of a control unit of the insecticidal device according to the third embodiment.

FIG. 12 is a flowchart showing a processing procedure of the apparatus.

FIG. 13 is a flowchart showing a processing procedure of the apparatus.

FIG. 14 is a diagram showing a relationship between set values for timers 1 and 2 and PWM control of a motor.

FIG. 15 is a flowchart showing a part of the processing procedure of the control unit of the insecticidal device according to the fourth embodiment.

FIG. 16 is a flowchart showing a processing procedure of a control unit of the insecticide according to the fifth embodiment.

[Explanation of symbols]

 Ro-Positive Thermistor M-Motor

Claims (4)

[Claims] 1. An airflow is caused to flow by a fan rotated by a motor over an impregnating material impregnated with a volatile agent such as a drug,
In a volatilization device such as a drug for volatilizing the volatile agent,
A device for volatilizing a drug or the like, characterized by comprising means for controlling the number of rotations of a motor. Means for controlling the number of revolutions of the motor,
2. The vaporizing device for a medicine or the like according to claim 1, wherein a rotation speed of the motor is controlled in a direction of detecting an outside air temperature and suppressing a change in a volatilization amount per unit time with respect to a change in the outside air temperature. 3. 3. A means for controlling the number of rotations of the motor,
3. The volatilization device for a drug or the like according to claim 1, wherein a power supply voltage is detected, and the rotation speed of the motor is controlled in a direction in which a change in the rotation speed of the motor with respect to a change in the power supply voltage is suppressed. 4. 4. A means for controlling the number of rotations of the motor,
The device for volatilizing a drug or the like according to any one of claims 1 to 3, wherein the number of rotations of the motor is reduced after a lapse of a predetermined time from the start of driving the motor.