JP2003199814A - Atomizing sterilization and deodorization device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a sterilization and deodorization means safe and efficient in a room and a method for preventing the loss of ozone even if a sterilizing and deodorizing liquid is atomized. <P>SOLUTION: The sterilizing and deodorizing liquid is ultrasonically atomized in a high concentration ozone atmosphere to obtain fine water drops containing ozone. Ozone can be added to water drops by allowing a mixed gas prepared by mixing an ozone gas and steam to be adsorbed by atomized water drops. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sterilization and deodorization by an atomizer using ozone or active oxygen.

[0002]

2. Description of the Related Art In conventional sterilization using ozone gas and deodorization, indoor ozone sterilization required approximately 1 ppm of ozone gas.

[0003]

However, ozone gas is
It is known that when the concentration is high, it is harmful to the human body and damages the eyes and respiratory system. Also, when ozone gas is sterilized in a room where airflow is not sufficiently circulated, such as in a room with a narrow ceiling, a room with a low ceiling, or a partition, etc. It could be several tens of times the points, and there was a possibility of injury to the worker's body. In the case of the discharge type, harmful nitrogen oxides are generated when ozone gas is generated. In order to solve these problems, it is necessary to provide a nitrogen oxide treatment means and reliably control the ozone concentration in the room. There is a demand for means for improving the diffusion of a certain gas or liquid in the room, or obtaining the same effect at a lower concentration, and means for reducing the adverse effect on the human body.

[0004]

Therefore, the inventor studied the possibility of sterilization and deodorization in the room by means other than using only ozone gas, which is difficult to use. Focusing on ozone water that is currently used for hand washing, etc., the idea was to atomize or vaporize the ozone water, but in the steam generation method by heating, most of the dissolved ozone gas in ozone water is decomposed, so most of it is decomposed. All were released into the air and no sterilizing or deodorizing effect was obtained. Further, even in the atomization method using an ultrasonic vibrator, the dissolved gas in the liquid is expelled by the ultrasonic irradiation. Moreover, since the dissolved ozone gas is always diffused from the liquid surface into the air, the dissolved ozone gas concentration is extremely low near the liquid surface. For these reasons, the ultrasonic atomized droplets contained almost no ozone gas, and no effect was obtained.

Therefore, in the atomization sterilization deodorizing apparatus characterized by comprising the first ozone gas generating means, the water atomizing means, and the means for mixing the ozone gas and the atomized water droplets of minute particle size,
Ozone gas is adsorbed on the atomized water droplets and diffused into the room. As mentioned above, even if the ozone gas-containing water is vaporized by ultrasonic waves, the ozone gas will escape, but conversely, if the water is atomized in high-concentration ozone gas, the ozone gas will be adsorbed on the surface of the water droplets and minute water droplets of ozone water will be generated. Found to be formed.
These minute ozone water droplets adhere to indoor odorous substances and airborne bacteria to sterilize or deodorize. According to this method, sterilization and deodorizing effects can be obtained regardless of the indoor ozone gas concentration. Further, since gas such as ozone and suspended dust such as bacteria are adsorbed on the surface of the minute water droplets to act as a catalyst, a greater sterilizing and deodorizing effect can be obtained than simply sterilizing with ozone gas.

Secondly, most of the floating bacteria normally form spores and become dormant in a bad environment such as low humidity and show resistance to ultraviolet rays, ozone gas and the like. However, when the humidity rises above about 50%, the time for which a thin water film is formed around the spores becomes longer, and the floating bacteria move from the dormant (spore) state to the active state. In the active state, the cell membrane of the bacterium has high permeability and is easily damaged by drugs, ultraviolet rays, ozone gas and the like. Therefore, the atomization sterilization deodorizer receives a signal from the humidity measuring means, and when the indoor relative humidity is less than or equal to an arbitrary value, the ozone gas generating means is stopped and the atomizing means is put into an operating state. By controlling by humidity, efficient sterilization becomes possible without discharging unnecessary ozone gas.

Thirdly, by providing means for mixing ozone gas and water vapor, and bringing the mixed gas into contact with the atomized water droplets, the water vapor is condensed around the fine water droplets produced by the atomization means as nuclei. By making the contact time between the ozone gas and the water droplet longer in the process of water droplet growth, ozone can be efficiently adsorbed on the water droplet.

The fourth aspect is characterized in that the atomizing means atomizes with an ultrasonic vibrator, and by controlling the atomized particle size at a plurality of vibration frequencies, water droplets can be formed in accordance with the volume of the room. It is possible to control the reach distance. Since minute water droplets have a large surface area compared to their volume, they gradually evaporate and finally vaporize. Therefore, when the flow velocity and humidity of the airflow are constant, the smaller the water droplet diameter, the shorter the water droplet arrival distance.
Further, it has been experimentally confirmed that the water droplet diameter is inversely proportional to the 2/3 power of the oscillator vibration frequency.

In the fifth aspect, the atomization sterilization deodorizing device is constituted by ozone water generating means, means for ejecting the generated ozone water from the small holes, and air blowing means for diffusing the ejected ozone water into the air. It becomes possible to atomize while containing ozone. Since ultrasonic waves and large thermal vibrations are not applied to the water, the displacement of dissolved gas is minimal, and since droplets can be generated without atomizing from the liquid surface, ozone water can be atomized.

Further, in the sixth aspect, by providing the apparatus with an ultraviolet irradiation means, ozone can be generated and decomposed, and the ozone gas or active oxygen concentration in the generated gas mixture can be supplemented. Sterilization and deodorization are possible. The irradiation wavelength range of the low-pressure mercury lamp includes a wavelength (λ = 253.7 nm) component that decomposes atmospheric ozone. By irradiating the mixture of water droplets and ozone gas with this ultraviolet ray, most of the ozone gas in the air is decomposed and becomes active oxygen. The generated active oxygen reacts with airborne dust to become normal oxygen. Active oxygen has the same sterilizing and deodorizing effects as ozone.

In the seventh aspect, by providing a means for supplying an additive that lowers the pH of the solvent water, the half-life of ozone can be extended and the sterilizing and deodorizing effect can be enhanced. It is known that the half-life of ozone in water is longer as the pH of the solution is lower.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of an atomizing device showing an example of the present invention. 1 is a mist outlet, 2 is a circulation atomization tank,
3 is a circulation fan, 4 is an ozone gas generator, 5 is an air cleaner, 6 is a blower, and 7 is an oscillation / control unit.
2 is a sectional view of the circulation atomization tank (2) of FIG. 8 is a fog outlet, 9 is a water inlet, 10 is a circulation fan,
11 is an intake port, 12 is a water surface, 13 is an atomization unit, 14
Is a small hole, 15 is a gas supply pipe, 16 is a circulation pipe, 17 is a water tank wall, and 18 is a signal line.

The air sucked from the air cleaner (5) is filtered by a built-in filter to remove suspended dust, and the humidity is reduced by a built-in desiccant, and the air is sent to the silent discharge ozone generator (4). The ozone generator operates only when the indoor relative humidity exceeds 50% due to the humidity sensor provided in the room. The generated high-concentration ozone gas is sent to the circulation atomization tank by the pressured blower (6) and sent under pressure into the gas supply pipe (15). A small hole (14) having a diameter of several millimeters is provided in the upper part of the gas supply pipe, and ozone gas is bubbled into the water through the small hole. A part of the released ozone gas is dissolved in water to form ozone water. The remaining ozone gas contains water vapor in the bubbles and is diffused from the water tank liquid surface (12) into the air in the water tank. The ozone gas containing the released water vapor is sucked from the intake port (11) of the circulation pipe (16) by the pressured fan (3, 10), and is again bubbled into the water through the small hole (14) provided at the upper part of the pipe. Is released. The air containing ozone gas repeats the above-mentioned circulation to increase the ozone concentration, and the amount of contained water vapor increases, so that the humidity becomes almost 100%. 200 KHz near the water surface
Water tank (2) with the atomizing unit (13) in which the oscillator of 2MHz, the oscillator of 2MHz, and the liquid level sensor are installed.
Ultrasonic atomization inside. At this time, the atomizing unit is controlled by the oscillation / control unit (7) provided outside the water tank wall (17) by the signal and power line (18). When the humidity is less than 50%, the control content is 200K so that the water droplets reach far enough and the humidity rises quickly to every corner of the room.
The oscillator of Hz is operated and the air volume of the blower (6) is increased. When the humidity is 50% or more, the ozone gas generator (4) is operated, the air flow rate of the blower is reduced, and the oscillator of 2 MHz is operated. 200 KHz
Then, the water droplet diameter is about 10 μm and about 2 μm at 2 MHz. In the vicinity of the water surface (12) in the water tank (2), ultrasonic waves are atomized in a high-concentration ozone gas atmosphere, and the humidity is almost saturated, so that the water droplets generated by the ultrasonic waves serve as nuclei and ozone gas easily forms on the water droplet surface. Adsorbed. The ozone gas mixture adsorbing the ozone gas is discharged indoors from the mist blowout ports (1, 8). When the water level drops, water that has passed through soft water is supplied from the water inlet (9).

The atomizing device shown in FIG. 3 is used for sterilizing and deodorizing floating bacteria in a wider area. FIG. 3 is an explanatory diagram showing an example of another atomizing device. 20 is a fog outlet, 21
Is a cover, 22 is a sprinkler pipe, 23 is an air supply pipe, 24 is a fan, 25 is a pan, 26 is a water supply pipe, 27 is a mixing tank, 28
Is a small hole, and 29 is an ultraviolet lamp.

Ozone water generated by an electrolytic ozone water generator (not shown) is supplied from the water pipe (26) to the mixing tank (27).
Is supplied to. In the mixing tank, carbon dioxide gas is supplied from the air supply pipe (23) and aerated with ozone water to be mixed. Ozone water is weakly acidic around ph6, but drops to around ph5 by absorbing a small amount of carbon dioxide. The ozone half-life can be extended by lowering ph to around 5. The mixed ozone water is supplied to a water sprinkling pipe (22) rotated by a motor by an internal water supply pump (not shown). There is a small hole (28) in the upper part of the sprinkler,
Sprinkle ozone water from the small holes. The sprayed ozone water is atomized by the fan (24). By spraying water and atomizing only by the air resistance by the wind, it is possible to atomize without flying ozone. The atomized ozone water is irradiated with ultraviolet rays together with air by a low pressure mercury lamp (29). The inner surface of the cover (21) of the atomizing device is mirror-coated, and ultraviolet rays are uniformly irradiated in the device. The ultraviolet rays emitted by the low-pressure mercury lamp have a wide wavelength range that extends over both a wavelength range of about 190 nm for generating ozone and a wavelength range of about 250 nm for decomposing ozone, so that ozone gas and active oxygen as a decomposition product thereof are generated. , Fog outlet (20)
Is released indoors. By increasing the concentration of ozone or active oxygen in the atomizer cover by UV irradiation, it is possible to prevent the diameter of water droplets from becoming smaller and ozone to be diffused into the air. The water droplets having a large diameter hit the cover and accumulate in the tray (25). The accumulated ozone water is returned to the electrolytic ozone water generator again.

[0016]

According to the above-mentioned invention, water droplets containing ozone or active oxygen are generated to adsorb dust such as floating bacteria,
It is possible to sterilize and deodorize with high efficiency. Furthermore, since the atomized water droplets are vaporized and there is a heat balance when water vapor is condensed on the surface of suspended dust, it is possible to obtain a higher sterilizing and deodorizing effect by promoting the diffusion of the air flow in the room. It has become possible.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of an atomizing device.

FIG. 2 is a cross-sectional view of the circulation atomization tank of FIG.

FIG. 3 is an explanatory diagram showing an example of an atomizing device.

[Explanation of symbols]

1, 8, 20 Mist outlet 2 circulation atomization tank 3, 10 circulation fan 4 Ozone gas generator 5 Air cleaner 6 blower 7 Oscillation / control unit 9 Water inlet 11 air intake 12 water surface 13 Atomization unit 14, 28 small holes 15 gas supply pipe 16 circulation pipe 17 aquarium wall 18 signal lines 21 cover 22 Sprinkling pipe 23 Air tube 24 fans 25 saucer 26 water pipe 27 mixing tank 29 UV lamp

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/78 C02F 1/78 F term (reference) 4C080 AA07 AA10 BB02 BB05 CC01 HH02 JJ01 LL02 LL04 MM01 MM08 NN01 QQ16 4D050 AA01 AB06 BB02 BD04 4G035 AB01 AB54 AE02 AE13 4G037 AA01 EA01

Claims (7)

[Claims] 1. An atomizing sterilization eraser comprising an ozone gas or active oxygen generating means (hereinafter referred to as ozone gas generating means), a water atomizing means, and a means for mixing ozone gas and atomized water droplets of minute particle size. Odor device. 2. When the signal from the humidity measuring means is received and the indoor relative humidity is below an arbitrary value, the ozone gas generating means is stopped and the atomizing means is controlled to be in an operating state. The atomizing sterilization deodorizing device according to claim 1, which is characterized in that. 3. The atomization sterilization eraser according to claim 1, wherein a means for mixing ozone gas or active oxygen and water vapor is provided, and the mixed gas is brought into contact with the atomized water droplets. Odor device. 4. The atomizing means is characterized in that the atomizing means atomizes with an ultrasonic oscillator, and the atomized particle size is controlled at a plurality of vibration frequencies. The atomizing sterilization deodorizing device described. 5. Atomizing, sterilizing and deodorizing characterized by comprising ozone water generating means, means for ejecting the generated ozone water from a small hole, and blowing means for diffusing the ejected ozone water into the air. apparatus. 6. The atomization sterilization deodorizer according to claim 1, 2, 3, 4, or 5, further comprising ultraviolet irradiation means. 7. A means for supplying an additive for lowering the pH of the solvent water is provided.
The atomization sterilization deodorizing device according to 3, 4, 5, or 6.