JP3106462U - Fog generation control device - Google Patents

Abstract

[PROBLEMS] To control mist particles to a particle size of 2μm ± 0.5μm, save energy significantly with high efficiency, reach the spray distance of 15 centimeters or more, and save energy for medical or humid operation. Providing a mist generation control device capable of obtaining a sufficient amount of atomization and adjusting the mist injection distance and particle size.
A mist generator includes an oscillating device, an atomizer driven by the oscillating device, a water guide structure that guides water to the atomizer, and a driving circuit that drives the oscillating device. The generator includes a launch plate 22, a plurality of minute launch holes 21 are opened on the surface of the launch plate, and a water guide structure is provided on one side facing the launch plate, and a trace amount of water film is formed by the water guide structure. Introducing liquid water, acting on the kinetic energy of the launch plate with a minute load, launching the mist with high efficiency, changing the operating frequency by modulating the drive circuit, adjusting the state of the mist, for example, The speed is adjusted by changing the frequency, and the mist injection distance and the mist particle size can be adjusted.
[Selection] Figure 1

Description

  The present invention relates to a fog generation control device, in particular, using current feedback, can automatically adjust the output power, and makes the output voltage constant by a constant voltage method, improving the stability at the time of fog generation, The present invention relates to a fog generation control device that can save power.

  As for fog generation technology, fog was generated by a method of generating steam by heating at an early stage and used for humidification or applied to medical auxiliary equipment. However, because it is a method of generating steam by heating, the required amount of energy consumption is large, and the heating method may cause chemical changes due to temperature in the medical device, which is disadvantageous for the control of the drug property For this reason, improvements have been made to generate fine mist by vibrating and splitting water or chemicals using mechanical vibration ultrasonic waves. Also, in the conventional ultrasonic vibration system, the vibration energy is concentrated on the surface of the water, and the action of the vibration of the energy causes the differentiated water particles to form fine granules, which are further blown by a fan. It is a mechanism that blows a fine mist on the end of use. However, since the method using ultrasonic waves directly contacts the vibrator with water, the vibrator is large, and unless a large electric power is used, energy cannot be transmitted in water and the liquid level cannot be moved. This is because the vibrator is in direct contact with the liquid, and the generated vibration energy is subject to wear due to the contact with the liquid water. Come out. In addition, due to the difference in the remaining amount of water and the difference in volume, the average degree of fog particles generated by the vibration wave varies, and it is necessary to blow by a fan, and it is in an empty state. In such a device, the vibrator is likely to be broken, and in a situation where the vibrator is not cooled, a state resembling empty baking may be formed and it may be broken.

The conventional ultrasonic operation has the following drawbacks.
1.
Power consumption is large, and it consumes 5 to 28w of power demand for materialization.
2.
The mechanism is complicated, the volume is large, and practical portable application is not possible.
3.
It is necessary to install a separate fan to send out the mist, which increases the volume and weight of the mechanism, and also increases energy consumption and noise.
Four.
Unreliable, when the ceramic chip is empty (when there is no liquid on it), it breaks quickly due to high temperature within a short time, rupture of the ceramic chip or plating or peeling or foaming of the silver conductive layer film, Will exceed the Curie temperature of PZT of about 200 ° C, and the function of the ceramic chip will be degraded and destroyed, making it unusable.
Five.
The particle size of fog particles cannot be controlled effectively. For example, when operating at a high frequency of 2 to 3 MHz, 70% only reaches a particle size of 0.5 μm to 5 μm, and the fog particles cannot be made uniform.
6.
Low circuit drive efficiency, overall efficiency is only η <35, equipped with conventional LC parallel or series resonant circuit, working frequency and output power can not be adjusted, product quality and performance should be adjusted constant I can't. Furthermore, since there is no load feedback control function, the ceramic chip vibrates at the full work rate even when the load is light or no load, so that a high temperature is generated and destroyed. Even if protection is performed with a temperature switch, destruction cannot be effectively prevented.
7.
Since conventional atomizers are in direct contact with liquid during ceramic chip operation, the resonant voltage on the electrode becomes 300 VAC or more during ceramic chip operation, which tends to generate hydrogen peroxide defects and electrolysis, and liquid components. Breaking down and forming insulation will further increase the complexity of the mechanism and the overall weight and volume.
8.
In order to obtain a practical atomization amount, a general atomizer needs to use a large ceramic chip of ψ25 mm or more, and the structure becomes fragile, so that it cannot pass the UL safety stipulated drop test.
9.
Some drugs may change their drug properties when the power is above 15W.

  The present invention is particularly improved in view of the above-mentioned problems, controls the generated fog particles to a particle size of 2 μm ± 0.5 μm, and guides the liquid from all directions to the adjacent surface of the launch plate. A water guide device is installed to form a water film-like water solution relative to the working surface of the launch plate, and exchange energy in a minute volume unit for the minute amount of water solution through the kinetic energy of the launch plate. It is possible to operate the energy completely at the full rate, to reduce wasteful load and to operate with high efficiency, greatly save energy, and the distance of the mist jet flow is 15 It is possible to obtain a sufficient amount of atomization for medical or humidification operation while reaching a centimeter or more and the required power is about 0.5 W to 0.8 W. Depending on the size and dynamic energy, different choices are possible. And an object thereof is to provide a control device.

  The fog generation control device according to the present invention mainly includes a vibrator, an atomizer driven by the vibrator, a water guide structure for guiding water to the atomizer, and a drive circuit for driving the vibrator. The atomizer includes a launch plate, has a plurality of minute launch holes on the surface of the launch plate, and has a water guide structure on one side facing the launch plate. The water film-like liquid is drawn, acts on the kinetic energy of the launch plate with a minute load, launches the mist with high efficiency, and modifies the fog state by changing the operating frequency by modulating the drive circuit. For example, it is possible to adjust the speed by changing the frequency, and to adjust the spray distance of the mist and the particle size of the mist.

  The fog generation control device of the present invention operates with high efficiency, can obtain a sufficient amount of atomization with power saving, and the drive circuit of the present invention adopts a PWM series LC resonance system and is very low Under voltage, an efficiency of 82% or more can be obtained even with a direct current of about 1.8 volts, and the output power and the working vibration frequency can be selected using a modulation circuit. In addition, the conventional product can only be operated for 15 minutes even with high-power lithium batteries sold in the market, consumes a lot of power, and the generated fog particles are not uniform. In actual trial production, only two AA batteries and a voltage of 3 volts are required, and continuous operation is possible for 120 minutes or more, which is a major advance in portable atomizers.

  In addition, this drive circuit may have a separate automatic power feedback function, which can automatically adjust the output power depending on the weight of the load and save energy. According to the structure, it is possible to operate lightly and efficiently, hold it in your hand, carry it in your pocket, or use a battery that can be easily replaced, which is highly convenient, It can be applied to all humidifiers and medical devices, and can be used not only for inhalation therapy and moisture control for bio-cultivation, but also for general atomizers. By changing the molecular structure, changing the density structure and dislocations between elements to improve the mouthfeel, it can also be applied to cosmetic equipment that removes foreign substances on the skin surface.

  Hereinafter, the fog generation control device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a three-dimensional view showing the structural relationship of the present invention. As shown in FIG. 1, the fog generation control device of the present invention mainly introduces a vibrator 1, an atomizer 2 driven by the vibrator 1, and water onto the atomizer 2. It consists of a water guide structure 3 and a drive circuit 4 that drives the vibrator 1. The vibrator 1 can employ various vibrators 11 driven by electric power. A ceramic may be used, and conductive coating layers 110 connected to a circuit are provided on the upper and lower surfaces of the piezoelectric ceramic, respectively, and a plurality of small firing holes 21 are formed on the inner surface of the firing plate 22 of the atomizer 2. The water guide structure 3 is installed on the lower surface of the plate 22 or adjacent positions, and the water guide structure 3 is composed of the capillary fibers 31 or the guide horizontal plate 32, and the capillary fibers 31 are collected in a bundle and then the end portions thereof The liquid is distributed on the edge, and the liquid becomes a film at the end. When the wave energy of the vibrator 11 is transmitted to 22, a high-frequency amplitude is formed, the vibration direction is perpendicular to the surface, and the upper and lower vibrations are formed, acting on the upper end plane of the capillary fiber 31. The water liquid is fired outward, and the water droplets are fired outward by the pressure pulse and the vibration action. Further, the guiding horizontal plate 32 holds a small amount of water liquid, similarly, the surface thereof faces the working surface of the launch plate 22, provides a small amount of water liquid to generate mist, and the top of the launch plate 22. To spray.

  FIG. 2 shows a cross-sectional view of the atomizer and water conveyance structure of the present invention. As shown in FIG. 2, a launch hole 21 is formed on the launch plate 22 of the present invention. The launch hole 21 receives the water liquid held by the capillary fiber 31 and compresses the water liquid by the wave amplitude. Is sprayed up. On the working surface of the firing plate 22, the moisture retained by the capillary fibers 31 is distributed over the entire upper surface of the capillary fibers 31, and the liquid on the surface forms a trace amount of water film distribution, The vibration energy of the launch plate 22 is constant in its acting force, but the kinetic energy generated by the launch plate 22 atomizes the small amount of water film because the water liquid to be vibrated is in the form of a small amount of film. The vibration energy exhibits a complete vibration action on a small amount of water film, can prevent a wasteful load on other objects, and avoids waste of energy.

  The process of forming the atomized particles 5 by the water film 51 is such that the water guided by the capillary fibers 31 forms the water film 61, and then the launch plate 22 swings up and down. There is a gap G between the upper ends 310 of the fibers 31 and the capillary fibers 31. The presence of the gap G facilitates the entry of the air A, and when the lower end of the launch hole 21 contacts the water film 51, the amplitude increases the moisture upward. In addition, since the space of the gap G generates a downward pressure on the launch plate 22, the water 52 is introduced into the launch hole through the assistance of air A in the process of the pressure. 21 is sent out. According to this operation method, the launch plate 22 applies a small volume of vibration and pressurization to the distributed water film 61 formed by the upper end portion 310 of the capillary fiber 31 so that the energy of the launch plate 22 is completely obtained. It acts, avoids the load on other objects, and the capillary fiber 31 replenishes moisture, continuously holds the liquid at the upper end 310, and allows continuous mist firing.

  FIG. 3 shows a drive circuit diagram of the present invention. As shown in FIG. 3, the drive circuit 4 of the present invention is composed of a microprocessor unit 41, a drive unit 42, a boost unit 43 and a feedback unit 44, and drives the vibrator 11 of the vibrator 1 to generate vibration. Let

The microprocessor unit 41 outputs a pulse-modulated PWM signal, and the drive unit 42 connects its input end to the output end of the microprocessor unit 41, and receives the PWM signal output by the microprocessor unit 41. Thereafter, a drive signal is output, and the step-up unit 43 is made of a transformer or piezoelectric ceramic, and its input end is connected to the output end of the drive unit 42 to increase the voltage and drive the vibrator (ceramic chip) 11. The feedback unit 44 is connected between the vibrator 11 and the microprocessor unit 41, and the microprocessor unit 41 averages the vibrators 11 detected through the feedback unit (current feedback) 44. The duty cycle of the output clock (Duty
Cycle) is determined, and the average current of the vibrator 11 is controlled.

  When the driving circuit 4 operates, the microprocessor unit 41 outputs a PWM signal, operates the driving unit 42, the boosting unit 43 increases the voltage, and drives the vibrator 11 after the voltage increases. Vibration is generated, the launch plate 22 of the atomizer 2 is operated, and the water conduction structure 3 exerts an atomization effect on the water film 61 guided on the launch plate 22.

Since the present invention uses a PWM signal, a transformer (TRANSFORMER) can be used to convert the resistance and reduce the operating voltage to 1.8V _DC . In addition, the output power is detected using the feedback (FEED BACK) method, and the constant voltage (CONSTANT
VOLTAGE), the circuit automatically adjusts according to changes in the load (vibrator 11), and the output is kept constant. In addition, this circuit structure can respond to changes in the input voltage ± 50%, can maintain the output stability, and can further expand the operating range.

  At the same time, the duty cycle is used to adjust the output power. Unlike the adjustment by the general drive voltage, more stable and energy saving is possible, and sufficient atomization is possible even when the total power consumption is 0.4W. The quantity can be obtained.

  Furthermore, since the transformer (TRANSFORMER) is used for the damping factor (DAMPING FACTOR) conversion, it can be perfectly matched to the capacitance of the ceramic chip (vibrator 11), and the vibration waveform is made closer to a sine wave (SINE WAVE). Can completely eliminate electromagnetic interference (EMI) interference.

  In addition, in the present circuit, the first adjustment unit 7 and the second adjustment unit 8 may be further added. The first and second adjustment units 7 and 8 are composed of variable resistors. The working frequency can be arbitrarily adjusted, and the second adjustment unit 8 can arbitrarily adjust the output power.

  The present invention has been described above based on the embodiments. However, the above-described embodiments do not limit the scope of the present invention, and any changes and modifications based on the gist of the present invention are within the scope of application of the present invention. Shall be included.

It is a three-dimensional view showing the structural relationship of the present invention. It is sectional drawing of the atomizer and water conveyance structure of this invention. It is a drive circuit diagram of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibrator 11 Vibrator 110 Conductive coating layer 2 Atomizer 21 Launch hole 22 Launch plate 3 Water guide structure 31 Capillary fiber 310 Upper end part 32 Guide horizontal plate 4 Drive circuit 41 Microprocessor unit 42 Drive unit 43 Boosting unit 44 Feedback unit 5 Fog Particle 51 Water film 7 First adjustment unit 8 Second adjustment unit
A air
G gap

Claims (11)

A mist generation control device for atomizing water or liquid, particularly formed from a vibrator and an atomizer driven by the vibrator, wherein the atomizer includes a flat launch plate, After receiving kinetic energy, it acts on a small amount of water film formed by the water guide structure through a plurality of minute launch holes provided inside, and uses the vibration energy of the launch plate to atomize the water film A fog generation control device characterized by being sent out. The fog generation control device according to claim 1, wherein the water guide structure is a bundle of capillary fibers and bundled. The fog generation control device according to claim 1, wherein the water guide structure is a horizontal guide plate. A fog generation control device for driving a drive circuit of a vibrator, the drive circuit comprising a microprocessor unit that outputs a pulse-modulated PWM signal, and an input terminal connected to the output terminal of the microprocessor unit, A drive unit that outputs a signal, a booster unit that includes an input terminal connected to an output terminal of the drive unit, and that raises the voltage; and a feedback unit that connects between the vibrator and the microprocessor unit, The output clock duty cycle (Duty) depends on the average current of the vibrator detected by the microprocessor unit through the feedback unit (current feedback).
Cycle) and automatically adjust the high work rate, stabilize the drive voltage with a constant output, and convert the vibration waveform to a sine wave (SINE
Fog generation control device that completely cancels electromagnetic interference (EMI) interference close to WAVE). The fog generation control device according to claim 4, wherein the boosting unit is a transformer or a piezoelectric ceramic. Among the above, the period from the input of the working voltage to the driving of the power output of the ceramic chip can be performed by one power conversion, and this is possible even when the input voltage is as low as 1.8V. The fog generation control device according to claim 4, characterized in that the conversion is performed once. 5. The fog generation control device according to claim 4, wherein the ceramic chip is clamped and fixed using a connector (CONNECTOR) and an adapter (ADAPTER), can be replaced, and does not require welding of a conductive wire. The fog generation control device according to claim 4, wherein a first adjustment unit for adjusting the working frequency is further added. The fog generation control device according to claim 8, wherein the first adjustment unit includes a variable resistor. The fog generation control device according to claim 4, wherein a second adjustment unit for adjusting output power is further added. The fog generation control device according to claim 10, wherein the second adjustment unit includes a variable resistor.

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