JP4697625B2 - Sterilization deodorization device - Google Patents

Description

  The present invention is placed in a business indoor space such as a hospital, a hotel, a restaurant, a banquet hall, a living space such as a house, an indoor space of a transportation means such as a ship, a train, a bus, and a car, and these spaces. The present invention relates to a method and apparatus for performing sterilization and deodorization by using ozone, ions, and chemically active species generated by plasma in combination with fog. Further, the present invention relates to a method and apparatus for sterilization and deodorization for the purpose of extermination of diseases and prevention of decay of vegetables and fruits in a greenhouse or vegetable warehouse. The present invention also relates to an apparatus for improving odors in waste treatment facilities such as garbage storage rooms, sewage treatment plants, leather factories, and other odorous environments.

In order to enhance the sterilization and deodorization effect, several methods and apparatuses for sterilization and deodorization using ozone mist have been proposed. For example, a method of spraying water with pressurized ozone gas using a two-fluid nozzle (Patent Document 1). Also, there is a method of increasing the pressure for driving the two-fluid nozzle by mixing pressurized ozone gas and compressed air (Patent Document 2). Furthermore, as a method for improving these drawbacks, the ozone generated by the mist generated by the two-fluid nozzle is dissolved by supplying ozone gas to the mist outlet of the two-fluid nozzle, and then residual ozone that does not dissolve in the mist is included. The inventor has applied for a method and apparatus for ejecting the mist (ozone mist) with air (Patent Document 3).
JP 2000-316956 A JP-A-10-226503 JP 2004-173904 A

  However, in these methods, ozone gas is generated by an ozonizer using discharge, and then ozone gas is supplied from a pipe to the two-fluid nozzle or nozzle outlet. Radicals other than ozone generated by discharge, ions, and other chemical activities Is relaxed and deactivated in the piping, and only long-life ozone effectively acts on sterilization and deodorization.

  As a result, in order to obtain the effect of sterilization and deodorization, it is necessary to enlarge the ozonizer or use excess ozone.

  In addition, since the inside of the two-fluid nozzle is in direct contact with ozone gas, corrosion due to ozone, and when ozone gas is used as the driving source for the two-fluid nozzle (Patent Documents 1 and 2), conditions such as the pressure and concentration of the ozone gas are required. It was necessary to select a two-fluid nozzle in consideration, and the selection range was narrow.

  Furthermore, in order to install the ozonizer separately, a pump was required to drive the ozonizer piping and the ozonizer.

  As a result, in the devices described in Patent Documents 1 to 3, the structure becomes complicated and expensive.

  The sterilization and deodorization performance is enhanced by the interaction of the very small particle size mist generated by the two-fluid nozzle independent of the pressure of ozone gas and the ozone, ions, and chemically active species generated by creeping discharge. Ozone, ions and chemically active species are made to reach far away with a fan, and as a result, the time required for sterilization and deodorization is shortened, the apparatus is downsized and the cost is reduced.

  Another purpose is to expose the air itself in the sterilization / deodorization space to creeping discharge, and the life generated by creeping discharge is short, but it is sterilized / deodorized by radicals with strong chemical activity, so that further sterilization / deodorization time can be increased. It is to realize shortening and downsizing and cost reduction of equipment.

  In the present invention, a creeping discharge element is arranged in a duct having a fan that sucks indoor air at one end, and a spray nozzle is arranged downstream of the duct to expose the indoor air directly to the creeping discharge. The generated ozone, ions, and chemically active species are mixed with the mist generated by the spray nozzle and sprayed on the surface or space to be sterilized / deodorized and released from the other end of the duct into the room.

  Also, the air flow sucked by the fan is divided into two, and one air flow flows through the center of the duct and hits the creeping discharge element, and then the fog generated by the spray nozzle placed immediately after that and the creeping surface The ozone, ions, and chemically active species generated by the discharge are mixed with the mist, and the other air flow is carried on the wall surface inside the duct to carry the mixed flow of ozone, ions, chemically active species, and mist. It is characterized by doing.

  Air in the sterilization / deodorization space is sucked into the duct by the fan, and directly exposed to the creeping discharge element mounted in the duct, so that it is sulfurized in the air by ozone, ions, and other chemically active species generated by creeping discharge. Malodorous components such as hydrogen and ammonia react to deodorize, and can also sterilize by acting on airborne bacteria contained in the air sucked into the duct. In particular, by directly exposing to a creeping discharge element, radicals such as oxygen radicals, nitrogen radicals, and hydroxyl radicals that have a short lifetime but are rich in chemical activity can also contribute to the sterilization / deodorization reaction.

  Ozone, ions, and long-lived chemically active species generated by creeping discharges are absorbed by the mist generated by the spray nozzle (especially the fine mist generated by the two-fluid nozzle) and sterilized and deodorized by the fan while colliding. It spreads. Malodorous components, bacteria, and viruses contained in room air collide with the mist particles and are adsorbed and dissolved in the mist (water) to sterilize and deodorize bacteria, viruses and malodorous substances in the air. Conversely, malodorous components, bacteria, and viruses contained in room air collide with mist particles and are adsorbed and dissolved in mist (water). Furthermore, ozone, ions and long life generated by creeping discharge on these mist particles In any case, sterilization and deodorization proceed using mist particles as a medium.

  Finally, ozone, ions, and long-lived chemically active species generated by fog and creeping discharge adhere to the surfaces of walls, floors, and other indoor objects, and malodorous components adsorbed on these surfaces. It can be sterilized and deodorized by acting on attached bacteria and viruses.

  Further, since the mist evaporates in the middle, the humidity of the sterilization / deodorization space can be increased. Sterilization / deodorization using ozone is effective at high humidity, particularly 80% or more, so evaporation becomes more effective as the mist is refined, and sterilization / deodorization by ozone becomes more effective.

  FIG. 1 schematically shows a sterilization and deodorization method according to the present invention. Indoor air is taken into the duct 3 from the fan 1, and the air flow taken in by the partition plate 2 is divided into an air flow 6 flowing through the center and an air flow 7 flowing through the duct wall surface.

  The creeping discharge element 4 is disposed at the outlet of the partition plate so that the air flow 6 flowing through the center directly hits the creeping discharge element 4. The creeping discharge element 4 generates a creeping discharge 8 in the vicinity thereof to generate particles having high chemical reactivity such as oxygen radicals, nitrogen radicals, hydroxy radicals, and ozone. Directly exposed. As a result, deodorization and sterilization proceed when these highly reactive particles collide with malodorous substances, bacteria, and viruses contained in the air.

  At the same time, the creeping discharge element 4 is deprived of the heat generated by the creeping discharge 8 by the air flow 6 flowing through the central portion, so that a stable discharge can be obtained without becoming high temperature.

  A spray nozzle 5 is placed immediately after the creeping discharge element 4, and a mist 9 is ejected from the spray nozzle 5. Ozone, ions (H3O +, O2-, etc.) generated by creeping discharge, and long-lived chemically active species (O2 *: excited species of oxygen, etc.) are generated by a mixed flow 10 formed from an air flow 6 flowing through the center of the duct. It is carried, shoots into the mist, dissolves in the mist, charges the mist, or sterilizes bacteria and viruses trapped in the surface tension of the mist.

  Since the surface area is increased when the mist particles generated by the spray nozzle 5 are made as small as possible, ozone, ions, long-lived chemically active species, etc. have a high probability of collision with the mist and are well absorbed by the mist particles. . That is, the amount of incident molecules such as ozone, ions, and long-lived chemically active species is proportional to the surface area of the fog (the square of the radius).

  Also, ozone, ions and long-lived chemically active species that did not hit the mist are deodorized and sterilized by the mixed flow 10 together with the mist and the carrier flow 11 formed from the air flow 7 flowing on the duct wall surface. It will be transported. The reaction described in the previous section also proceeds during the conveyance process.

  In this case, since the transport stream 11 transports the mixed stream 10 from the outside, ozone, ions, long-lived chemically active species, and fog can be transported far away. Note that the mixed flow 10 and the transport flow 11 are gradually mixed, and thus there is no clear boundary, but is schematically shown in FIG.

  Finally, fog that adsorbs ozone, etc., adheres to the surfaces of walls, floors, and other objects in the room, and acts on malodorous components adsorbed on these surfaces, adhering bacteria and viruses. It can be sterilized and deodorized. Further, ozone, ions, and long-lived chemically active species collide and are adsorbed on the mist adhering to the surface, and sterilization and deodorization proceed.

  Further, since the mist evaporates in the middle, the humidity of the sterilization / deodorization space can be increased. Ozone remaining in the sterilization / deodorization space becomes more effective at high humidity (particularly 80% or more).

  FIG. 2 shows an example of a sterilization deodorization apparatus according to the present invention. A fan 21 is disposed at one end of the duct 22 and a partition plate 23 is placed behind the fan 21. As shown in FIG. 3, the partition plate 23 is narrowed from the front to the rear. Further, a gap 44 is provided on the outer side between the partition plate 23 and the duct 22.

  The air sucked in by the fan 21 is divided by the partition plate 23 into an air flow flowing through the central portion and an air flow flowing through the outer duct side, and the air flow flowing through the central portion is accelerated by the partition plate while increasing the flow velocity. It hits the creeping discharge element 36 placed immediately after.

  As the creeping discharge element 36, for example, a cylindrical ceramic 46 as shown in FIG. 4 may be used in which a dielectric electrode 34, a dielectric (ceramic) 33, a discharge electrode 32, and a surface protection tank 45 are sequentially formed. An earth terminal 29 and a high voltage terminal 30 for connecting the discharge electrode 32 and the induction electrode 34 to the high frequency high voltage power source 25 (which may be a pulse power source) via the earth wire 24 and the high voltage wire 26 are connected to the outside of the duct 22 via the flange 31. By providing in, the high voltage short circuit accident by the acid and salt which are produced | generated by creeping discharge can be prevented. Although not shown, short-circuiting between the duct 22 and the discharge electrode 32 can be prevented by grounding the duct 22 and the ground wire 24 together and applying a high voltage to the induction electrode 34.

  Further, the heater 35 is brought into close contact with the inside of the cylindrical ceramic 46 of the creeping discharge element 36 via the heat conductive silicon 47. And it is good to connect the heater power supply 28 to the heater 35 for the fixed period at the time of apparatus start-up or regularly, and to heat a creeping discharge element.

  Since this apparatus generates fog and disperses it in the sterilization / deodorization space, the humidity of the space increases. In particular, the humidity may become 100% in a low temperature storage of garbage. Therefore, even if the creeping discharge element 36 absorbs moisture or condenses and a high frequency high voltage is applied, the creeping discharge may not occur as it is. In addition, when nitrate is generated on the surface of the creeping discharge element 36, the nitrate absorbs moisture and deliquesces, thereby inhibiting the occurrence of creeping discharge.

  In that case, if the moisture of the creeping discharge element 36 is discharged in advance by the heater 35, the occurrence of creeping discharge is facilitated. Thereafter, the creeping discharge element 36 can prevent moisture from being adsorbed by the heat generated by its own discharge, and therefore the heater 35 usually only needs to be energized before the creeping discharge element 36 starts discharging.

  Next, a two-fluid nozzle 37 is arranged immediately after the creeping discharge element 36, and fog is generated from the nozzle outlet 38. A compressed air pipe 39 and a water pipe 40 having a valve 41 are connected to the two-fluid nozzle 37. If a compressor 69 (FIG. 5) capable of supplying pressure and flow rate for driving the two-fluid nozzle 37 is connected to the compressor pipe 42 and a water tank 60 (FIG. 5) is connected to the water tank pipe 43, the mist from the nozzle outlet 38 Will occur.

  If the target sterilization / deodorization space is narrow, for example, in the interior of an automobile, if it is necessary to reduce the amount of mist generated so that the interior does not get wet, it can be adjusted by the valve 41.

  FIG. 5 shows a creeping discharge / fog generator 62 and a compressor 69 in which the duct 22, the high-frequency high-voltage power supply 25 and the wiring (heater wiring 27, high-frequency high-voltage power supply wiring 59, fan wiring 58) shown in FIG. This is a sterilization and deodorization apparatus according to the present invention comprising a base unit 70 in which a timer control circuit 54 and a switch (not shown) are housed in a housing 53.

  The creeping discharge / mist generating part 62 is configured such that the water tank 60 is housed on the side surface thereof, and can be used as an integral part of the base part 70 or can be used separately.

  When used separately, for example, the base portion may be placed outside a sterilization / deodorization space such as an automobile interior or a low-temperature cool box, and the wiring 55 and the compressed air piping 66 may be extended. Use after separation is convenient when the space to be sterilized / deodorized is narrow or the environment is inferior, and the timer control circuit 54 and the compressor 69 cannot be used in those spaces.

   As clean water, clean tap water with no particulate suspended solids is usually used. In particular, in order to enhance the bactericidal action, a drug such as formalin is used in combination (initially, a drug such as formalin is used. However, when water with surface activation (for example, water with surface activation by applying ozone treatment, discharge treatment, or microvalve injection treatment for a long time) is used. When the mist adheres to particles having bacteria or viruses, the bacteria and viruses are covered with a film of water by the surface active action, so that ozone dissolves in the water film and the bactericidal effect is increased. Similarly, the deodorizing action on the surface is also increased.

  In the apparatus having the configuration shown in FIG. 5, tap water was sprayed from the two-fluid nozzle 41 at a rate of 2 liters per minute. The particle size of the fog at this time was 40 micrometers. The creeping discharge element 37 was supplied with a discharge power of 20 W. The amount of ozone generated at this time was 0.4 g / h. The fan 21 was driven and air was allowed to flow from the duct 22 at 100 m 3 / h.

  A solution of ammonia water (about 10% by weight ammonia) and water mixed at a ratio of 1:10 in a 20m3 room and heated as an odor source was heated for 15 minutes and then left for 15 minutes, resulting in an indoor ammonia concentration of 26 ppm. It was. Similarly, when the apparatus described above was operated for 15 minutes after the solution was heated for 15 minutes, the indoor ammonia concentration was 15 ppm, which was significantly lower than when the apparatus was not operated.

  Moreover, the said apparatus was driven in the room of 20 m3, and the falling bacteria were investigated. Falling bacteria were examined by exposing food stamps (Nissui Pharmaceutical Co., Ltd., standard agar and X-GAL agar) to the room for 10 minutes, 60 minutes, and 10 minutes after the operation for 60 minutes immediately after the operation of the apparatus. The expression of colonies of falling bacteria could not be confirmed from any sample.

It is a schematic diagram which shows the principle of the sterilization deodorizing method of this invention. It is a block diagram which shows embodiment of the sterilization deodorizing apparatus of this invention. It is sectional drawing of the partition plate used for this invention. It is sectional drawing of the creeping discharge element used for this invention. It is a block diagram which shows another form of implementation of the sterilization deodorizing apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fan 2 Partition plate 3 Duct 4 Creeping discharge element 5 Spray nozzle 6 Air flow which flows through center part 7 Air flow which flows through a wall surface 8 Creeping discharge 9 Fog 10 Mixed flow 11 Conveyance flow 12 Fog particle 21 Fan 22 Duct 23 Partition plate 24 Ground Line 25 High-frequency high-voltage power supply 26 High-voltage line 27 Heater wiring 28 Heater power supply 29 Ground terminal 30 High-voltage terminal 31 Flange 32 Discharge electrode 33 Dielectric 34 Induction electrode 35 Heater 36 Creeping discharge element 37 Two-fluid nozzle 38 Nozzle outlet 39 Compressed air piping 40 Water Piping 41 Valve 42 Compressor Piping 43 Water Tank Piping 44 Gap 45 Surface Protective Layer 46 Cylindrical Ceramic 47 Thermal Conductive Silicon 51 Plug 52 Power Cord 53 Housing 54 Timer Control Circuit 55 Piping 56 Connector 57 Wiring Connector 58 Fan Wiring 59 High-frequency high-voltage power supply wiring 60 Water tank 61 Housing 62 Creeping discharge / mist generation part 63 Water joint 64 Air joint 65 Water tank pipe 66 Compressor pipe 67 Compressor head 68 Filter 69 Compressor 70 Base part

Claims (5)

  The air flow sucked by the fan attached to the entrance of the duct is divided into two by a pair of partition plates that are narrowed from the front to the rear, and the air flow that flows through the center of one is in the center of the duct Concentrate to increase the flow velocity and pass through the surface discharge element, and the spray nozzle placed immediately after it, and mix the ozone, ions, and chemically active species generated by the surface discharge into the mist generated by the spray nozzle. The sterilization deodorizing apparatus is characterized in that the airflow flowing through the other duct wall surface flows on the wall surface inside the duct and conveys mixed ozone, ions, chemically active species, and mist.   A creeping discharge element having a discharge electrode on the outer surface of a cylindrical dielectric as the creeping discharge element, an induction electrode inside, and a heater attached to the inner cylinder of the cylindrical dielectric The sterilization deodorizing apparatus according to claim 1.   The sterilization and deodorization apparatus according to claim 1 or 2, wherein the spray nozzle is a two-fluid nozzle having a compressed air supply port and a liquid supply port.   4. The sterilization deodorizing apparatus according to claim 3, wherein a water flow rate adjusting valve is provided between the liquid supply port of the two-fluid nozzle and a water tank connected thereto. 5. The sterilization and deodorization apparatus according to claim 3, wherein a casing in which a compressor communicating with the compressed air supply port of the two-fluid nozzle is housed is integrally attached to the duct.

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