KR100799104B1 - PHOTOCATALYTIC REACTION BOARD IN COMPLEX AIR PURIFIER AND IT's WATER INJECTION METHOD - Google Patents

Abstract

The present invention proposes a photocatalytic plate structure of an air cleaner for cleaning indoor air by a photocatalytic reaction by a photocatalytic reaction device installed on a passage through which air flows and a washing action by a water filter, and a water injection method of water filter of the water filter. It is to.

To this end, the present invention provides a photocatalyst plate which constitutes a photocatalytic reaction device in an air purifier for purifying indoor air by a photocatalytic reaction by a photocatalytic reaction device installed on a passage through which air flows and a washing action by a water filter. A plate having a photocatalyst formed on the surface of the silver is formed in parallel with the air passage so as not to disturb the flow of air, and each plate is fixed by a spacer so that a constant distance is maintained. ) Photocatalyst plate structure including clip, irregularities formed on the surface of water spray, and grinding net formed on the bottom of the photocatalyst plate, and 1.2 ~ 4 kg / ㎠, which is 1.2 ~ 2 times the normal pressure at the initial 1 ~ 30 minutes A water injection method of a water filter constituting an air purifier, characterized in that for spraying a stream of water under pressure.

Photocatalyst, photocatalyst plate, photocatalytic reaction, water filter, water curtain, water spray method, material after photocatalytic reaction

Description

Photocatalyst plate constituting air cleaner and water spraying method of water filter {PHOTOCATALYTIC REACTION BOARD IN COMPLEX AIR PURIFIER AND IT's WATER INJECTION METHOD}

1 is a structural diagram of an air cleaner to which the present invention is applied

2A to 2D are a perspective view, a side view, a plan view, and a planar enlarged view, respectively, showing the structure of the photocatalyst plate to which the present invention is applied;

3a to 3c is an embodiment of the present invention in which the irregularities are formed on the water jet surface

Figure 4 is a flow diagram of the flow of water in a state that contaminants on the surface of the photocatalyst

*. Explanation of Major Codes

10. Case 11. Air passage 12. Doorway

20. Fan 30. Photocatalytic Reactor 40. Water Filter

41. reservoir tank 42. sump tank 43. pump

44. Water supply pipe 45. Customs

50. Water supply 60. Drainage

70. Clip 80. Unevenness 90. Grinding net

The present invention relates to a photocatalytic structure of an air cleaner for purifying indoor air by a photocatalytic reaction by a photocatalytic reaction device installed on a passage through which air flows and a washing action by a water filter, and a water jetting method of a water filter. will be.

In connection with the purification of indoor air, air purifiers using photocatalysts and water have been proposed by Patent Nos. 10-0570099 and 10-0570100 and are usefully used. This photocatalytic reaction device includes a case including an air passage formed in an up and down direction, a photocatalytic reaction device installed on the air passage, and a water filter installed in parallel or independently of the photocatalytic reaction device to wash air. By the photocatalytic reaction by air and the air cleaning function by the water filter, the automatic cleaning after the photocatalytic reaction can be performed simultaneously or in combination.

The structure of the photocatalyst is a photocatalyst reaction that absorbs ultraviolet rays irradiated by the UV lamp to oxidize and extinguish various contaminants in contact with the surface, and the photocatalyst spreads widely when the ultraviolet rays are applied while spraying the water stream to the photocatalyst plate. By using superhydrophilicity, by-products are removed by photocatalytic reaction, and the constituent element that circulates and purifies indoor air by washing water to separate and remove fine dust or harmful odor gas contained in air by contacting water film and air is applied.

Therefore, the air purifier of the type described above is continuously and semi-permanently purged by maintaining the initial state at all times by the automatic cleaning in which the photocatalyst plate performing the core purification function periodically performs differently from the general filter type or the electrostatic precipitating type air purifier. Functions are performed, and the photocatalytic reaction and the water washing mechanism by the water filter work in combination, and harmful substances generated in buildings such as radon gas and formaldehyde, including volatile organic compounds included in indoor air, and hydrogen sulfide. , Odor gas such as ammonia, air pollutants such as sulfur oxides (SOx) and nitrogen oxides (NOx), organic chlorine compounds such as trichloroethylene, phenol compounds, polyvinyl chloride (PCB), environmental hormone (Bisphenol, Nonylphenol, Estradiol), Dioxin Acetaldehyde, Casillin, Toluene, Styrene Hydrogen Sulfide, Methylmer Adsorption, dissolution and diffusion of water containing contaminants, odors, micro-dust and bacteria or viruses not processed by the photocatalytic reaction device, as well as the treatment of microorganisms such as ethane, methyl emulsion, trimethylamine, isogilacetic acid, bacteria and bacteria By absorbing and separating by the characteristics of surface tension, sedimentation and sterilization, it can produce clean and fresh air, and vaporization and humidification is performed by air flow by fan to regulate indoor air to about 50 ~ 60% health humidity. In this case, the zoom can provide an effect of further improving the quality of indoor air.

Such an air purifier has a structure in which a photocatalytic reaction device and a function and configuration such as water washing and air washing by a water filter are combined in combination, and according to the program of the control apparatus, various operation methods are applied as follows.

① photocatalytic reaction

In the case of selecting air cleaning by photocatalytic reaction, when the surface of the photocatalyst is dried and light corresponding to energy larger than the band gap energy of the photocatalyst is irradiated by the UV lamp, two electrons (e-) and holes ( h +) carriers are formed, hydroxy radicals (.OH) are produced by the oxidation of holes to oxidatively decompose organic compounds, viruses, etc., and electrons react with oxygen to produce superoxide radicals (O _2-. ) Then, hydroxy radicals (.OH) are produced through various reaction paths. The photocatalytic reaction serves to oxidize and remove volatile organic compounds, environmental hormones, air pollutants, various pathogens and microorganisms.

In the case of continuous photocatalytic reaction, after a certain time, photocatalytic reaction occurs because by-products and grease contained in the air are irregularly formed on the surface of the photocatalyst after blocking the contact between the photocatalyst and contaminants. I do not lose. Therefore, the photocatalyst plate needs a periodic cleaning process, and even if only the photocatalytic reaction is performed, an automatic washing function for washing the photocatalyst plate with water at a predetermined time should be programmed.

② Sterilization by UV

In order to induce oxidation / reduction reaction of photocatalyst to which semiconductor principle is applied, light energy of more than bandgap for electron transition should be applied, which is obtained by ultraviolet rays below 380nm, among which 253.7 has the highest sterilization ability. Use ultraviolet light of nm size. The ultraviolet rays are directly irradiated with the microorganisms, so that ultraviolet energy is absorbed by proteins and nucleic acid bodies, which are the main members of the microorganisms, thereby inhibiting or destroying the activity of the microorganisms' DNA, thereby causing a strong sterilization without resistance.

The ultraviolet ray is water permeable and provides an effect of destroying not only floating bacteria but also underwater bacteria.

Therefore, the above ultraviolet rays have a function of sterilizing various microorganisms and pathogens, etc. filtered by air and water alone or in combination with a photocatalytic reaction device.

③ Air cleaning function by water filter

Spraying a stream of water to the photocatalyst and applying ultraviolet light results in superhydrophilicity, in which water completely spreads over the surface. Therefore, even if a small amount of water is sprayed on the photocatalyst plate, it spreads widely while forming a thin water film, and the wide spread water absorbs fine dust and various harmful and odorous gases contained in the air by contacting with air while maintaining a high specific surface area, and neutralizing them. And filter.

In addition, the water film formed on the photocatalyst plate is controlled by evaporation by contact with the air in which the flow is formed by the fan, thereby controlling indoor humidity. Since the vaporized water particles are small enough, the floating microorganisms in the air piggyback and diffuse. Rather, it is absorbed by floating microorganisms and increases its weight to sink to the floor and maintains proper humidity in the room to prevent injuries of fine dust and sink to the floor.

④ Cleaning function of photocatalyst plate

Spraying a stream of water to the photocatalyst and applying ultraviolet light results in superhydrophilicity, in which water completely spreads over the surface. Therefore, water penetrates and separates by-products and other pollutants and photocatalysts after photocatalytic reaction attached to the photocatalyst plates, and the separated pollutants are loaded by gravity and flowing water into the lower sump and periodically with the washing water. To be discharged.

The cleaning mechanism of the photocatalyst plate acts to maintain the photocatalyst in its initial state at all times by a safe and efficient cleaning method of the photocatalyst surface, which is susceptible to damage, so that the purification ability is semi-permanently maintained. It may be made or operated in a form that is made or coupled to the air cleaning function by the water filter.

Operation of the air purifier according to the above method is carried out in the form of individually performing or combining ①②③④.

Observations of various types of operation have shown that the reaction by-products in the form of grease on the surface of the photocatalyst plate when washing after performing the photocatalytic reaction, or when air is washed by a water filter after the photocatalytic reaction or during initial operation in a stationary state for a long period of time. As contaminants are attached, the cleaning efficiency is lowered, and the phenomenon of preventing water film formation by the superhydrophilic reaction of the photocatalyst occurs. That is, when water is sprayed on the surface of the photocatalyst under UV irradiation, the water spreads and flows down to form a water film, and the water film penetrates into the pollutant by a small contact angle with the photocatalyst substrate to separate and separate the pollutants from the photocatalyst plate. The contaminant is washed by the action of the flow rate flowing down the surface of gravity and photocatalyst, and the washing mechanism is washed out. As shown in Fig. 4, the phenomenon of flowing down the surface of the photocatalyst plate in the form of a stem is maintained for a considerable time, thereby deteriorating the cleaning efficiency of the photocatalyst plate and the purification efficiency by the water filter.

In addition, in some cases, the water flowing down in the form of the stem may leave the photocatalyst plate and flow down to the inner wall of the case or outflow to the outside of the air supply outlet according to the shape of the attached pollutant.

On the other hand, the water flowing down while forming a thin water film on the photocatalyst plate flows at a very high speed because the air flow acts on gravity when air flows downward, and falls down when it collides with a sump tank. In order to prevent this, in the conventional case, a chain is installed between the sump tank and the photocatalyst plate to maintain a constant water level in the sump tank, and the structure is configured to approach the sump tank and the photocatalyst plate almost. Falling sound occurs when falling directly to the collection tank by the direct dropping or the foreign matter formed on the photocatalyst plate.

The present invention is a photocatalyst plate structure that can prevent a phenomenon that the sprayed water flows out without forming a water film to escape the outside of the photocatalyst plate when cleaning the photocatalyst plate or purifying water for air purification by a water filter To present.

In addition, the present invention proposes a photocatalyst plate structure which can effectively aggregate and remove contaminants such as fine dust by crushing the sprayed water into small particles to form a negatively charged small spray.

In addition, the present invention is to reduce the water quality of the circulating water by increasing the amount of evaporation and increasing the amount of dissolved oxygen by releasing the water film breaks by the flow rate while mitigating the noise caused by the flow rate at the bottom of the photocatalyst plate and the wave is induced on the surface of the sump The present invention proposes a photocatalyst plate structure in which a capacity of circulating water is increased and a capacity of the circulating water is increased as necessary or a drop sound is prevented by water drops falling directly.

In addition, the present invention is to clean the water after the end of the photocatalytic reaction, purification by the water filter after the end of the photocatalytic reaction or coincident with the photocatalytic reaction, during the initial operation of the water filter, or periodically spraying water at a pressure higher than the normal pressure for a certain time The water spray control method prevents the water sprayed on the surface of the photocatalyst in the form of a stem to improve the cleaning and purification efficiency of the photocatalyst plate, and the water is periodically crushed to prevent the water spray effect. Has the purpose to improve.

To this end, the present invention provides a photocatalyst plate structure for forming a water clip on the outer wing of the photocatalyst plate, and a photocatalyst plate structure in which the upper water jetting surface of the photocatalyst plate is formed with irregularities so as to be broken during water jetting. And, the present invention provides a photocatalyst plate structure that spaces the lower end of the photocatalyst plate and forms a grinding net in a water collecting tank installed under the photocatalyst plate.

In addition, the present invention prevents the water sprayed on the surface of the photocatalyst to flow down in the form of a stem to improve the efficiency of cleaning and purification of the photocatalyst plate, and to improve the purification efficiency by the spray effect by crushing the water periodically Water for the purpose of cleaning after the end of the photocatalytic reaction, purifying by the water filter after the end of the photocatalytic reaction or coinciding with the photocatalytic reaction, and injecting water at a pressure higher than the normal pressure during the initial operation of the water filter or periodically for a predetermined time. The injection control method is presented.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a view illustrating a structure of an air cleaner to which the present invention is applied, a case 10 in which an air passage 11 is formed in an up and down direction, a forward and reverse rotatable fan 20 installed above the air passage, The photocatalytic reaction device 30 is installed on the air passage, and the water filter 40 is installed in parallel with the photocatalytic reaction device to perform the air cleaning action by washing the photocatalyst plate and filtering the water. .

The photocatalytic reaction device 30 includes a photocatalyst plate 31 and a UV lamp 32 for irradiating ultraviolet rays to the photocatalyst plate.

The photocatalyst plate 31 is a plate having a photocatalyst formed on the surface thereof so as to be parallel to the air passage so as not to disturb the flow of air, and each plate body is structured to be fixed by the spacer 31a to maintain a constant gap. The wing 31b is bent to the air inlet 12 to guide the flow of air to the air inlet 12 formed on the side of the (10) to the air inlet so as to block the outflow of water during the washing or water filter function.

UV lamp 32 is formed on the air passage to maintain a right angle to the photocatalyst plate to provide the ultraviolet light required for the photocatalytic reaction and ultraviolet energy for air and water sterilization, and is not directly in contact with water It is installed in the case so that it can be replaced at the outside of the case after using it for a lifetime.

The water filter 40 may be formed independently of the photocatalytic reaction device by performing the cleaning function by water by pumping water contained in the case and sprinkling it on the air passage, but the illustrated embodiment is a washing function after the photocatalytic reaction. It is shown that the present invention is applied to an air cleaner composed of a photocatalytic reaction device and an integrated structure so as to simultaneously perform a washing function with water.

In the water filter, a water storage tank 41 is formed at a lower portion of the case, and a water collecting tank 42 is formed at each lower portion of the photocatalyst plate. The water filter pumps the water contained in the water storage tank with a pump 43 and supplies the water supply pipe 44 with it. It is supplied to the capillary pipe (45, 배치 管) arranged on the upper portion of each photocatalyst plate through, and the tubule is composed of a structure in which water is sprayed to the photocatalyst plate by a nozzle (45a) formed to face the photocatalyst plates on both sides at a predetermined interval. .

The water filter 40 is configured to operate at the time of initial operation, at the time of washing the photocatalyst plate or at the same time as the photocatalytic reaction, the water contained in the reservoir tank is pumped and sprinkled on the photocatalyst plate, the water flowing down the photocatalyst plate in the water collection tank The water used is received in the form of repeated circulation for a predetermined time by being returned to the water storage tank, the shortage water by the evaporation is supplied by the water supply unit 50 connected to the water pipe, and the water used for a certain time is used to prevent contamination. In order to have a structure that is discharged to the outside through the drainage device (60) and then supplied again by the water supply device (50).

The present invention has a structure in which a clip 70 for exponential water is formed on the blade 31b constituting the photocatalyst plate 31 in the above structure, as shown in FIGS. 2A to 2D, and the upper portion of the photocatalyst plate. Photocatalyst plate structure to form irregularities 80 on the water spray surface to be crushed during water spraying, and photocatalyst plate spaced apart from the lower end of the photocatalyst plate in the collection tank installed at the lower portion of the photocatalyst plate to form a grinding net 90 The structure is selected or combined.

The clip 70 is made of a cross-sectional clip structure so as to be fitted to the full length of the wing, and has a structure in which a water plate (71, 돌출 水 板) of a structure protruding a predetermined portion with respect to the contacting photocatalyst plate is formed. .

The index plate 71 is combined with the bent wing to block the flow of water flowing out of the wing surface to completely block the phenomenon of leakage of the outflow of the flow of water or the outer wall of the case, sprayed as described below The effect is exponential even if the quantity is increased and the water pressure is increased.

The unevenness 80 formed on the upper water spray surface by the present invention may be configured in a variety of protrusion structure, the water splashed by the water is sprayed to the protrusion is broken by the uneven structure between the protrusions and the big splash and small The spray is formed together, and the large spray is used for air cleaning or washing of the catalyst plate while forming a water film by the superhydrophilic action of the photocatalyst, and the small spray is filled in the air passage, which is the space between the photocatalyst plates, It works to filter out smudges and odors.

It is also known in part by releasing negatively charged droplets, such as those generated in waterfalls, usually called anions, as natural states by charging the negatively small droplets with the amount of large droplets crushed by the "Leonard effect". A losing anion effect can be obtained.

In the illustrated embodiment, the unevenness 80 formed on the water jetting surface is a structure punched in the shape of the unevenness, and the air tank between the photocatalyst plate is formed by the air pressure and the space in which the small water droplets are formed in the stream of water broken by the space adjacent to the jetting surface. The diffusion into the furnace can improve vaporization humidification, and the purification efficiency can be improved by filtering negative ions in response to pollutants or ultrafine dust, which are mainly in a cationic state.

Grinding net 90 is a net structure formed at the bottom of the photocatalyst plate to prevent the falling sound caused by the water flowing down at a high speed directly contact the water surface, and to break the water flowing at a high speed to the small by the Leonard effect By forming a spray, the air passages are filled with finely charged fine water particles, improving the purification efficiency by these water particles, and allowing the flowing water to softly land while making small waves in the sump to increase dissolved oxygen. It acts to ensure that the water quality of the water is preserved. In addition, the water droplets formed by taking a nozzle formed in the tubules or water droplets separated from the photocatalyst plate are received and guided to the water collecting tank in a crushed state, thereby acting to block the falling sound.

The grinding net 90 according to the embodiment has a structure in which a stainless steel net of 3 to 5 mm eye size is bent in a shape of a pin and inserted into a space between the lower ends of the photocatalyst plates. Only one mesh can be installed, and it can be composed of two or three layers with a slight gap. It can contact not only the water film flowing through the photocatalyst plate but also the large water drops falling through the air passage, effectively breaking it without noise and guiding it to the sump tank. It works.

In the above, the lower end of the photocatalyst plate and the lower end of the crushing net are configured to be separated by 1 ~ 2cm from the bottom of the water collection tank, and by doing so, the storage surface of the water collection tank and a drop of about 0.5 to 1.5 cm occurs when the water filter is operated. The air contact surface of the water droplets crushed into the crushing net by the drop is increased and forms a small wave at the moment of falling on the water surface to absorb more air, thereby increasing the amount of dissolved oxygen in the circulating water to generate fresher air.

The present invention also provides a method for injecting water into the photocatalyst plate structure of the above structure, water injection method for injecting water at a pressure of about 1.2 to 2 times the normal working pressure during the initial or periodic period of water injection present.

In the water spraying method, the water sprayed on the surface of the photocatalyst flows in the form of a stem by applying a pressure of 1.2 to 2 times to about 1 to 2 kg / cm 2, which is a pressure sprayed onto the photocatalyst plate through a nozzle. It provides the effect of improving the cleaning and purification efficiency of the photocatalyst plate.

In addition, by repeating the above-described high-pressure spraying periodically for a certain time, it generates a large and small spray by the crushing of water, thereby providing the effect that the negatively charged small particles of water are discharged together with the purified air.

The above water spray is sprayed at high pressure during the initial 1-30 minutes during the washing of the air by the water filter, and then sprayed at the normal pressure or sprayed at the normal pressure for 1-2 hours, and then again at a high pressure for 1-30 minutes. It may be made by the method of periodically spraying the furnace. After washing the photocatalytic reaction, the washing efficiency is improved by spraying water at high pressure.

The photocatalyst plate structure according to the present invention sprays water at a pressure higher than the normal water pressure to improve the cleaning efficiency even in the state of surface contamination of the photocatalyst, and flows in the form of a stem to reduce the purification efficiency while spraying water to the outside of the photocatalyst plate. It provides an effect to prevent the phenomenon of departure.

In addition, the present invention forms a negatively charged water droplets by crushing the water stream into large particles and small particles by the projections formed on the spray surface, which can effectively remove and remove contaminants such as fine dust, and there is no fear of ozone. Anion effect by natural anion occurring at

In addition, the present invention is the bottom of the photocatalyst plate is separated from the sump and crushing net is formed to mitigate the fall noise caused by the flow rate while crushing the water to generate a small spray of negative ions and the wave formed on the surface of the sump increases the amount of dissolved oxygen circulation It prevents water deterioration and increases the water injection pressure, thus providing no dropping sound.

In addition, the water spraying method according to the present invention is applied to the photocatalyst plate structure to prevent the water sprayed on the surface of the photocatalyst in the form of a stem, improve the cleaning and purification efficiency of the photocatalyst plate, by the Leonard effect The negatively charged water droplets are formed to obtain high quality purified air.

Claims (6)

In an air purifier that purifies indoor air by photocatalytic by a photocatalytic device installed on an air flow path and by a washing action by a water filter, the photocatalyst plate constituting the photocatalytic reaction device has a photocatalyst on its surface. The plate is formed to be parallel to the air passage so as not to disturb the flow of air, each plate is fixed with a spacer so that a constant distance is maintained, the water-resistant clip is formed on the outer surface of the photocatalyst plate The photocatalyst plate structure which comprises the air cleaner characterized by the above-mentioned. The photocatalyst plate structure of claim 1, wherein irregularities are formed in the upper water jetting surface of the photocatalyst plate to break up the sprayed water. The photocatalyst plate structure as claimed in claim 1, wherein the lower end of the photocatalyst plate is spaced apart from the sump tank, and a pulverization net having a mesh structure is formed between the lower end of the photocatalyst plate. 4. The photocatalyst plate structure as claimed in claim 3, wherein the grinding net has a structure in which a net is bent into a space between the lower ends of the photocatalyst plate and fixed. In spraying water on the photocatalyst plate according to any one of claims 1 to 4, the water is sprayed at a pressure of 1.2 to 4 kg / cm 2, which is 1.2 to 2 times the normal pressure for 1 to 30 minutes at the initial stage of water spraying. Water spraying method of the water filter constituting the air purifier, characterized in that. In spraying water to the photocatalyst plate according to any one of claims 1 to 4, spraying the water stream at a pressure of 1.2 to 4 kg / cm 2, which is 1.2 to 2 times the normal pressure periodically for 1 to 30 minutes. Water injection method of a water filter constituting an air purifier characterized in that.

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