JP2006136485A - Apparatus for deodorization serving also for sterilization - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for deodorization serving also for sterilization capable of providing sufficient deodorization and sterilization effects in simple constitution and contributing to energy saving. <P>SOLUTION: The apparatus for deodorization serving also for sterilization is provided with a ventilation path in which an ozone supply part and adsorption part for sterilization serving also for deodorization are successively provided from the upstream side to the downstream, wherein water-soluble odor materials in an air current are dissolved in water supplied to a ventilation path part between the ozone supply part 26 and the adsorption part 70 at the upstream of the adsorption part 70 and can be discharged to the outside of the ventilation path together with the water, and the absorption part 70 is formed of hydrophobic porous adsorbent such as active carbon. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sterilization / deodorization device, and more particularly to a sterilization / deodorization device for a circulation type air conditioning system used in a biological clean room such as an animal laboratory.

  At animal laboratory buildings, water-soluble odorous substances such as ammonia and hydrogen sulfide and water-insoluble odorous substances such as methyl sulfide and methyl mercaptan are generated from laboratory animals. There is a possibility that air exhausted from the air will re-enter the animal rack through the circulation path. Therefore, a conventional animal laboratory air conditioning system adopts an all-outside air system in which outside air is processed by an air conditioner, blown into the animal room, and exhausted from the room without returning to the air supply side. However, from the viewpoint of energy saving, there is a need for a sterilization / deodorization device for circulation type air conditioning.

    This type of device is known to have an air passage with an ozone generation UV lamp on the upstream side and an activated carbon filter on the downstream side so as to decompose odorous substances adsorbed on the activated carbon with ozone. (Patent Document 1). This is because the decomposition reaction by ozone has a low reaction rate, so that the amount of reaction is increased by keeping the odorous substance at a fixed location (adsorption surface) in the airflow, and the deodorizing effect is increased. The activated carbon is regenerated as an adsorbent by decomposing molecules of the odorous substance adsorbed on the surface of the steel, thereby extending the life of the activated carbon.

  Also, instead of decomposing odorous substances with ozone, water is sprayed in the form of atomized water, and the odorous substances are dissolved in the mist particles, which are then condensed by an air cooler and drained. Is also known (Patent Document 2).

Furthermore, the method of spraying ozone water into the air requires a large amount of water, so to save water, water is dropped from above multiple vertical parallel fins, and odorous substances are dissolved in the water flowing down the surface of each fin. In addition, there is also known one provided with the solvent water so as to be received by a water receiving portion below each fin and discharged to the outside (Patent Document 3).
JP2003-135579 JP2001-87618 JP 2002-61903 A

    In the ozonolysis method of Patent Document 1, since the surface of activated carbon is hydrophobic, water-soluble odorous substances are difficult to be adsorbed. As is well known, the adsorptive power of activated carbon acts as the sum of van der Waals force, electrostatic attractive force, hydrogen bonding force, etc. between the surface of activated carbon having a large number of pores and gas molecules. Although it is adsorbed, the amount of adsorption is reduced and the deodorizing performance is inferior compared with a water-insoluble odor substance.

    On the other hand, the water-dissolving devices of Patent Documents 2 to 3 cannot exhibit deodorizing power against water-insoluble odor substances.

    Therefore, the present applicant considered the combined use of the ozonolysis method and the water dissolution method in an air conditioning system such as a laboratory animal house that generates water-soluble and water-insoluble odorous substances. It was found that sufficient deodorization and sterilization performance could not be obtained by simply connecting each type of device.

  When the water-dissolving type apparatus of Patent Documents 2 to 3 is connected to the downstream side of the ozonolysis apparatus of Patent Document 1, in other words, from the upstream side of the circulation channel for air conditioning of the animal dormitory, the UV lamp, the adsorbing part, the vaporizing type When the humidifier and the air cooler are sequentially installed, there are the following problems.

    First, in the above connection example, water-soluble odorous substances such as ammonia flow into the upstream activated carbon filter before being removed by the downstream water-dissolving device, and are adsorbed compared to the water-insoluble odorous substances. Even if the property is low, it is adsorbed on a part of the finite adsorption point on the activated carbon surface, so that the adsorption load of activated carbon is increased and the deodorizing power against water-insoluble odorous substances is reduced.

Second, the decomposition reaction of ammonia by ozone is not a spontaneous reaction (2NH ₃ + O ₃ + E → N ₂ + 3H ₂ O; E (reaction energy)> 0) and proceeds as long as there is no external energy supply. Since it is difficult, once ammonia is adsorbed on the adsorption point on the surface of the activated carbon, it is difficult to remove it with ozone, thus preventing regeneration of the activated carbon filter.

    Thirdly, bacteria are likely to be generated in the laboratory animal house, but in the configuration example in which the UV lamp, the adsorption part,... Are sequentially arranged from the upstream side, it is relatively easy for bacteria on the airflow to pass through the installation place of the UV lamp. Since it is a short time, all the bacteria cannot be sterilized by the ultraviolet rays or ozone, and the remaining bacteria may enter into the pores of the activated carbon. In this case, since ozone gives priority to the decomposition of the organic substance on the surface of the activated carbon and does not exert the bactericidal power to the inside of the activated carbon, there is a possibility that the bacteria may propagate inside the activated carbon. In order to avoid this, it is necessary to increase the distance between the UV lamp and the suction portion, but if this is done, the entire apparatus becomes long.

    On the other hand, when the ozonolysis apparatus of Patent Document 1 is connected to the downstream side of the water-dissolving apparatus of Patent Documents 2 to 3, that is, from the upstream side of the circulation channel, a vaporizing humidifier, an air cooler, a UV lamp, and The following problems may also occur when the adsorption units are sequentially installed. That is, air containing bacteria and spores from the animal laboratory may enter the ventilation path and reach the vaporizing humidifier without sterilizing with a UV lamp, and may contaminate the water. When using it, bacteria and algae may grow in the circulation channel and become unsanitary, and in order to prevent this, it is necessary to inject a disinfectant.

  Accordingly, the present invention provides a sufficient deodorizing and sterilizing effect with a simple configuration, and as a sterilization / deodorizing device contributing to energy saving, an ozone supply unit for deodorization or sterilization is provided upstream, and an adsorption unit formed of activated carbon is provided downstream. Provided with an air passage provided in each of the parts, in which water-soluble odorous substances are dissolved in water and discharged from the air passage in the air passage part between the ozone supply part and the adsorption part. With the goal.

  The first means is a sterilization / deodorization apparatus having an air passage in which an ozone supply unit and an adsorption unit for sterilization / deodorization are sequentially provided from the upstream side to the downstream, and the ozone supply unit 26 In the water supplied to the air passage part between the adsorbing part 70 and the adsorbing part 70, it is dissolved upstream of the adsorbing part 70 so that it can be discharged out of the air passage together with the water, and the adsorbing part 70 is hydrophobic porous such as activated carbon It is made of a material adsorbent.

    The “ozone supply unit” is one that generates ozone in the ventilation path by using ultraviolet rays as described later, and one that introduces ozone generated by a known ozone generator outside the ventilation path into the ventilation path. Either is fine. In the latter case, ozone water in which ozone is dissolved in water in a pressurized state can be carried into the air passage.

    The “air passage portion between the ozone supply unit 26 and the adsorption unit 70” includes the same part as the ozone supply unit.

    The second means includes the first means, and an ultraviolet light source 28 that also serves as a germicidal lamp is installed upstream of the ventilation path 24, and the installation location is used as an ozone supply section 26. The ozone supply section The vaporizer humidifier 32, the air cooler 54, and the adsorption unit 70 are sequentially installed from the downstream to the water, and the water-soluble odor substance is dissolved in the suspended particles of water discharged from the vaporizer humidifier 32. Thus, the suspended particles of water containing the odorous substance are condensed by the air cooler 54 and are discharged to the outside of the air passage through the drain pan 58 installed below the air cooler.

    The “vaporizing humidifier” may be one that sprays ozone water in the form of a mist, for example, but in order to save water, water is dropped on a fin-shaped or belt-shaped vaporizing element installed in the air passage. Thus, it is desirable that the flowing water is vaporized from the surface of the element. In addition, the vaporizing humidifier has both upper and lower sides of the vaporizing humidifier and both sides of the outer side of the vaporizing humidifier so that all of the air sent in the ventilation path passes through gaps between a plurality of vaporizing elements (for example, fins described later). It is desirable to provide a closing means for closing the space between the air passage inner surface portions facing these surfaces.

    Here, the “floating particles of water” includes mist particles generated by condensation of water vapor in addition to water splashes scattered from the vaporizing humidifier.

  The third means includes the second means, and the vaporizing humidifier 32 is arranged in parallel with a plurality of vertical fins 38 spaced apart from each other and oriented parallel to the flow direction. In addition, water is supplied from above the vertical fins 38 so that a part of the water flowing down the surface of each vertical fin is vaporized in the air, and the remaining liquid is collected under the vaporizing humidifier 32. It collects through the pan 44 and is provided so as to be re-supplied to the vaporizing humidifier 32, and is configured so that the upstream surface S of the frame 34 is irradiated with ultraviolet rays from the ultraviolet light source 28.

  The “ultraviolet light source” can be configured as a cylindrical ultraviolet lamp horizontally disposed in the air passage so that ultraviolet light is incident between the vertical fins without a blind spot.

  The “frame” may have any shape, but it is desirable that the upstream surface of the frame be formed flat so that ultraviolet rays are uniformly irradiated.

  "Vertical fins" are vaporizing elements for flowing and vaporizing liquid on the surface, and are formed of an inorganic material that has ozone resistance and water retention, such as ceramic, zeolite, alumina oxide, etc. Can do.

  In this specification, “upstream surface” refers to a surface portion that appears on the upstream side of a certain member, and “upstream end surface” refers to an end surface that appears on the upstream side of a certain member. To do.

  The fourth means includes the third means, and the frame body 34 includes a pair of vertical frame plates 34a on both sides in the width direction of the air passage 24 facing each other, and a horizontal frame connecting the both frame plates. The vertical fins 38 supported by the horizontal frame plates 34b and 34c are juxtaposed between the vertical frame plates 34a and vented from the upstream end of the frame body 34. A flow path regulating blocking plate 36 that also serves as a bacteria capturing means is projected to the side inner surface and the ceiling surface side of the path 24, and at least the upstream end surface of the vertical frame plate 34a and the upstream surface of the blocking plate 36 are upstream of the frame body. S is formed.

  The “frame” can be formed of a transparent material that transmits ultraviolet rays, for example, a transparent plastic, including the closing plate, thereby eliminating a blind spot where ultraviolet rays do not reach. Further, the upstream surface S of the frame body is preferably a non-porous surface (non-porous surface) so that bacteria do not enter inside like activated carbon.

  The fifth means includes the fourth means, and the ultraviolet light source 28 can irradiate ultraviolet rays on the upstream portion of each adjacent vertical fin 38 facing surface and the side inner surface of the vertical frame plate 34a. It is provided as follows.

  As a preferred example, if the ultraviolet light source is a rod-shaped ultraviolet lamp installed horizontally in the direction of the width of the air passage 24, it is possible to uniformly irradiate the surfaces with ultraviolet rays.

    The sixth means includes the first means described above and supplies ozone water to the vaporizing humidifier 32 disposed upstream of the air passage 24, so that the humidifying portion of the vaporizing humidifier 32 is made ozone. While also serving as the supply unit 26, an air cooler 54 is installed in the air passage portion between the vaporizing humidifier 32 and the adsorbing unit 70, and the suspended particles of water released from the vaporizing humidifier 32 are Dissolving water-soluble odorous substances, condensing suspended particles of water containing the odorous substances in the air cooler 54, and draining them outside the air passage through a drain pan 58 installed below the air cooler. Provided.

    The seventh means includes the sixth means, and the vaporizing humidifier 32 is arranged side by side with a plurality of vertical fins 38 that are spaced apart from each other and oriented in parallel to the flow direction. In addition, water is supplied from above the vertical fins 38 so that a part of the water flowing down the surface of each vertical fin is vaporized in the air, and the remaining liquid is collected under the vaporizing humidifier 32. It collects through the pan 44 and is provided so as to be re-supplied to the vaporizing humidifier 32.

    The eighth means includes any one of the first to sixth means, and the adsorbing portion 70 is replaced with a hydrophobic porous adsorbent, and the adsorbing portion 70 is replaced with a hydrophobic porous adsorbent. Instead, it is formed of an inorganic porous base material on which an oxidizing agent is supported. In particular, it can be formed with a catalyst in which a transition metal oxide such as manganese dioxide is supported on an alumina or ceramic porous body.

The invention according to the first means has the following effects.
○ Water-soluble odorous substances are dissolved in water and discharged between the ozone supply section 26 on the upstream side of the air passage 24 and the adsorption section 70 on the downstream side, and the water-soluble odorous substances reach the adsorption section 70 The water-soluble odorous substance is dissolved in water and drained, and the water-insoluble odorous substance is separately separated by the oxidizing action of ozone in the adsorption unit 70. And high deodorizing performance can be obtained.
○ Since ozone is supplied at the same location or upstream of the location where the water for dissolving odorous substances is supplied, the odorous substance dissolving water can be sterilized with ozone, especially by circulating the water for dissolution. When used, it is possible to prevent germs and algae from breeding in the circuit.
○ Since water-soluble odorous substances such as ammonia are dissolved in water and removed upstream of the adsorption unit 70, a large reaction energy is required for the decomposition reaction with ozone when the adsorption unit is an activated carbon filter. Can be prevented from being adsorbed on the surface of the activated carbon, and the regeneration of the activated carbon can be facilitated.

The invention according to the second means has the following effects.
○ Since an ultraviolet light source 28 that also serves as a germicidal lamp is installed upstream of the vaporizing humidifier 32, the portion of the light emitted by the light source that does not contribute to the ozone generation reaction is effective for sterilizing bacteria that adhere to the air or the inner surface of the passage This is hygienic because it can prevent germs from propagating in a vaporizing humidifier that has an excessive amount of water.
○ In addition, by preventing the propagation of various germs in the vaporizing humidifier as described above, the ozone of the cocoon consumed for the sterilization treatment is directed to the decomposition of odorous substances (especially water-insoluble odorous substances). And the processing capacity of odorous substances is improved.
○ Since it is provided to release suspended particles of water from the vaporizing humidifier 32, for example, the contact area with air is significantly larger than the surface of water stored in the water tank, so water-soluble odorous substances and ozone It is easy to dissolve, and the wastewater from the air passage contains ozone, so that the treatment load of the wastewater is reduced.

The invention according to the third means has the following effects.
○ Since a plurality of vertical fins 38 are juxtaposed via the frame body 34, germs floating in the air can be captured on the surfaces of the vertical fins 38 and the frame body 34 and sterilized by ozone in this state. , Sterilizing effect is increased.
Since the plurality of vertical fins 38 are oriented parallel to the flow direction and the upstream surface S of the frame 34 is irradiated with ultraviolet rays from the ultraviolet light source 28, in addition to the bactericidal action by ozone, The bactericidal action is exhibited and the bactericidal power is further improved.
○ Since the water flowing down the vertical fins 38 is vaporized, the amount of water used can be saved compared to the method of spraying water into the air.

  According to the fourth aspect of the invention, since the blocking plate for restricting the flow path also serving as the bacteria trapping means is projected from the upstream end of the frame 34 to the side inner surface and the ceiling surface of the air passage 24, the sterilizing effect Will be further increased.

  According to the fifth aspect of the invention, since the upstream portion of the opposing surface of each adjacent vertical fin 38 to which bacteria easily adhere and the side inner surface of the vertical frame plate 34a can be irradiated with ultraviolet rays, vaporization can be performed. Bacterial growth in the humidifier can be further prevented.

The invention according to the sixth means has the following effects.
○ By supplying ozone water to the vaporizing humidifier 32, the vaporizing humidifier is also used as a means for ozone supply. Compared to the case where the ozone supply unit and vaporizing humidifier are provided separately, the entire device The structure can be simplified and the initial cost can be reduced.
○ While supplying ozone water to the vaporizing humidifier 32, water-soluble odorous substances are dissolved in the water particles discharged from the vaporizing humidifier, and the water particles containing the odorous substances are condensed by cooling and discharged. Since it is provided to drain through the pan 58, the water drained to the outside after being supplied into the air passage is used as a medium for introducing ozone when supplying water, and for deriving odorous substances when draining. Since it can be used twice as a medium, water saving can be achieved and the running cost can be reduced.

  According to the seventh aspect of the invention, the germs floating in the air can be captured on the surfaces of the vertical fins 38 and the frame body 34 and sterilized with ozone in this state as in the third means. Since it can, the bactericidal effect is enhanced.

  According to the eighth aspect of the invention, the adsorbing portion 70 is formed of an inorganic porous substrate carrying an oxidant instead of the hydrophobic porous adsorbing material. The water-insoluble odor substance can be processed by selecting the water-insoluble odor substance in the adsorption unit 70 and the water-soluble odor substance between the ozone supply unit 26 and the adsorption unit 70.

  FIG. 1 thru | or FIG. 6 has shown the example which applied the sterilization combined deodorizing apparatus which concerns on 1st Embodiment of this invention to a laboratory animal house.

  In FIG. 1, 2 is an experimental animal house, 4 is an air exhaust passage attached to a part of the experimental animal house, 6 is an air circulation path for air purification of the experimental animal house, and 10 is an intermediate part of the air circulation path. It is the sterilization and deodorizing apparatus which concerns on this application attached to. In addition, 6a is a suction port of an air circulation path, and 6b is a blower outlet.

  The sterilization and deodorization apparatus 10 includes a water supply mechanism 12, an outside air introduction path 18, a ventilation path 24, and a drainage path 62.

  The water supply mechanism 12 supplies water from the water tank 16a communicating with an external water supply source to the upstream portion of the aeration path 24 via the feed path 16b with the water supply valve 14, and returns the water recovered from the upstream portion. The water tank 16a is provided so as to return to the water tank 16a via the 16c, and the water tank 16a, the transmission path 16b, and the return path 16c constitute the circulation water path 16. A water supply pump (not shown) is installed in a part of the circulation channel so that the amount of water supplied to the vaporizing humidifier 32 can be adjusted by adjusting the opening of the water supply valve 14.

  The outside air introduction path 18 is a pipe line connected from the outside air introduction port 20 to the upstream end of the ventilation path 24, and a blower fan 22 is installed in the middle of the duct.

  The air passage 24 is a pipe line that forms a part of the air circulation path 6 and has a rectangular cross section. In the air passage 24, an ozone supply unit 26, a vaporizing humidifier 32, an air cooler 54, a heating unit 66, an adsorption unit 70, and a blower fan 76 are sequentially provided from the upstream side, and the vaporizing humidification is performed. A water collection pan 44 is formed on the bottom wall portion of the air passage below the vessel 32, and a drain pan 58 is formed on the bottom wall portion of the air passage 54 below the air cooler 54.

  In the present embodiment, an ultraviolet light source 28 for sterilization and ozone generation is installed upstream of the air passage 24, and the space around the light source is used as the ozone supply unit 26. In the illustrated example, a plurality of cylindrical ultraviolet light sources 28 are disposed between the inner surfaces of the air passages 24 at intervals. In the air passage 24, a plurality of ultraviolet light sources 28 are arranged in parallel in the vertical direction, and the number of light sources corresponding to the required ozone amount among these ultraviolet light sources can be selected and turned on by the switch 30. is doing. This switch may be switched manually, or may be switched on and off by a sensor described later.

  2 and 3, the vaporizing humidifier 32 has a frame 34 erected from the water collecting pan 44, and the ventilation path is inserted into the ventilation path 24 through the frame. A plurality of vertical fins 38 aligned in parallel to the longitudinal direction are juxtaposed, and a sprinkler 40 is installed above the vertical fins 38. The vaporizing humidifier 32 is arranged at least at a location where ultraviolet rays from the ultraviolet light source 28 reach. Further, the amount of odorous substance dissolved by the vaporizing humidifier 32 can be increased or decreased according to the total amount of water passing through the surfaces of the vertical fins 38. This water amount control will be described later.

  As shown in FIGS. 3 to 4, the frame body 34 includes a pair of vertical frame plates 34a facing each other on both sides in the width direction of the air passage, and a pair of upper and lower first horizontal plates that connect the upstream end surfaces of both the vertical frame plates. The frame plate 34b is formed by a pair of upper and lower second horizontal frame plates 34c that connect downstream end surfaces of the two frame plates. Supports each end of the side. As shown in FIG. 3, a frame opening 35 that opens forward is provided between the vertical frame plates 34a, and a gap between the periphery of the frame opening and the inner surface of the air passage 22 is closed by a closing plate 36. The air is configured to flow between the vertical fins 38 via. In the illustrated example, the vertical frame plate 34a of the frame 34 extends to the vicinity of the ceiling surface of the air passage 24 above the upper end surface of the vertical fin 38, and the vertical frame plate portion above the upper end surface is extended. The intermediate closing plate 36a is installed between the upstream end portions, and the side closing plate portions 36b are provided to project outward from the upstream end portions of the vertical frame plates 34a. The closing plate 36 is formed by the portion 36a and the side closing plate portion 36b. Unlike the illustrated example, the closing plate 36 may be projected upward and laterally outward from the downstream end of the vertical frame plate or the middle portion in the flow direction. However, as will be described later, when the blocking plate is also used as a bacteria capturing plate, it is desirable to attach it to the upstream end near the ultraviolet light source 28.

  The vertical fins 38 are formed in a zigzag shape (or corrugated shape) as viewed from the flow direction as shown in FIG. 1, and are provided so that water droplets can be kept on the surface of the fins for a long time. Although not shown in the drawings, the ridge line of the corrugated plate is formed so as to gently wave when viewed from above so that the contact surface with air becomes large.

  The water sprinkler 40 is a horizontal cylindrical member having water holes formed in the lower half of the cylindrical wall as shown in FIG. 2, and is positioned above the vertical fins 38 and oriented in the air passage width direction. The sprinkler in the illustrated example is closed at both ends, and the tip of the water supply path 16b of the water supply mechanism 12 described above is connected to the middle portion in the longitudinal direction. The sprinkler 40 is preferably provided so as to sprinkle over the entire length of the vertical fin 38 in the flow direction.

  The water collecting pan 44 has a rectangular bottom wall that is approximately the same width as the width of the ventilation passage 24, and the first partition wall 46 is formed from at least the upstream end of the bottom wall as shown in FIG. In addition, the second partition wall 47 is erected from the downstream end portion, and in the illustrated example, both end portions of the partition wall are in liquid-tight contact with the inner surface of the air passage. Of course, it is good also as the dish shape which made the partition wall go around from the periphery of the bottom wall. A water collection hole 48 is formed in the bottom wall of the water collection pan, and the water collection hole is connected to the return path 16c of the water supply mechanism 12 through the air passage bottom wall. Further, the auxiliary closing plate 50 protrudes from the upper end of the first partition wall 46 toward the frame body, and the downstream end of the auxiliary closing plate is brought into contact with the lower first horizontal frame plate of the frame 34, Regardless of the water level in the water collecting pan, the air flow is provided so as to pass through the gaps between the vertical fins by blocking the passage of the air current inside the water collecting pan.

  In the illustrated example, the upstream surface of the frame body 34 (the upstream end surface of the vertical frame plate, the upstream surface of the first horizontal frame plate, and the upstream surface of the closing plate) and the upstream surface of the first partition wall 46 of the water collecting pan 44. The upper surface of the auxiliary blocking wall 50 is a surface for trapping (attaching) bacteria and sterilizing with ultraviolet rays, and is preferably a flat surface that is difficult to cause shadows. It is preferable to use a non-porous surface that does not enter the surface.

  The air cooler 54 has an ability to condense dissolved water of an odor substance and can be formed by a cooling coil or the like. A drain pan 58 is formed below the air cooler 54. This drain pan has substantially the same structure as the water collection pan 44 except that it does not have an auxiliary closing plate, and the first and second partition walls 46 and 47 are erected from both ends in the flow direction of the bottom wall of the drain pan. At the same time, the drain hole 60 drilled in the bottom wall passes through the bottom wall of the air passage 24 and is connected to the drain passage 62.

  The heating unit 66 is provided to return the temperature of the airflow lowered by the air cooler 54 to the room temperature of the experimental animal house.

The adsorbing unit 70 is configured by laminating a plurality of known dry activated carbon filters, and can replace a filter layer that has lost its activity (ie, has run out of life) by adsorbing excess odorous substances and the like. Yes. The activated carbon filter has the ability to adsorb not only odorous substances but also ozone. When ozone is adsorbed, the activated carbon is consumed by the decomposition reaction of C + 2O ₃ → CO ₂ + 2O _2. In the state where coexisting with ozone, ozone is consumed in the decomposition of odorous substances adsorbed on the surface of the activated carbon, and on the contrary, the activated carbon is regenerated. However, when ozone is temporarily excessively supplied, ozone gas harmful to animals needs to be decomposed with activated carbon, and the necessary number of activated carbon filters are installed.

  The blower fan 76 is installed downstream of the suction unit 70, but its position can be changed as appropriate.

  In the illustrated example, the concentration of the water-soluble odor substance that cannot be completely removed by the vaporizing humidifier 32 and the air cooler 54 by the water-soluble odor substance concentration sensor 42 installed between the heating unit 66 and the adsorption unit 70. When the concentration exceeds a reference value, the opening of the water supply valve 14 is increased to increase the processing capacity of the odorous substance by the vaporizing humidifier 32. Regarding ammonia among odorous substances, the allowable concentration of ammonia in the animal breeding area is generally about 20 ppm, so the standard value of the ammonia concentration for blowing air to the breeding area is a value lower than the above allowable concentration, for example, 10 ppm. It is good to define.

  In the illustrated example, the concentration of the water-insoluble odor substance that cannot be completely processed by the ozone supply unit 26 and the adsorption unit 70 is detected by the water-insoluble odor substance concentration sensor 72 installed downstream of the adsorption unit 70. The number of ultraviolet light sources 28 that are turned on when the concentration increases is increased, and the processing capacity of odorous substances by the ozone supply unit and the adsorption unit is increased. Furthermore, an ozone concentration sensor 74 is installed on the downstream side of the adsorption unit 70 so as to reduce the number of ultraviolet light sources 28 that are turned on when the ozone concentration exceeds a reference value.

  In the above configuration, air containing odorous substances (water-soluble odorous substances and water-insoluble odorous substances) and bacteria generated in the experimental animal house 2 is ventilated through the air circulation path 6 by the operation of the blower fan 22. At the same time, ultraviolet rays are irradiated from the ultraviolet light source 28 in the ozone supply unit 26, and at the same time, ozone is generated in the air by the ultraviolet rays. Thereby, a part of bacteria is sterilized by the sterilizing power of ultraviolet rays and ozone. However, since the airflow is always flowing, most of the bacteria reach the vaporizing humidifier 32 together with the odor substance without being decomposed. Here, bacteria are respectively present on the upstream surface S of the frame 34 of the vaporizing humidifier 32, the upstream end surface of the first partition wall 46 of the water collecting pan 44, the upper surface of the auxiliary closing plate 50, and the upstream end surface of each vertical fin 38. In the attached state, it is irradiated with ultraviolet rays from the ultraviolet light source 28, and most of them are killed.

    On the other hand, when bacteria enter the vaporizing humidifier 34 through the frame opening 35 of the frame 34, the inner side surface of the vertical frame plate is always covered with running water like most of the surface of the vertical fin 38. Because it is not a translation, it is easy for bacteria to attach and propagate. Even when the surface of the vertical fin 38 is provided with uneven engagement means (not shown) between the upstream surface of the vertical fin and the downstream surface of the first horizontal frame plate 36b (referred to as the surface appearing downstream). In the upstream facing surface portion of the vertical fin below the engaging means, water circulation becomes worse and bacteria may adhere. In the present invention, the ultraviolet light source is a horizontal rod-shaped ultraviolet lamp, so that the ultraviolet rays are evenly irradiated from multiple directions to the inner surface of the vertical frame plate and the upstream facing surface portion of the vertical fin.

  In the vaporizing humidifier 32, the water supply from the water supply mechanism 12 is distributed to the upper part of the vertical fin 38 by the water sprinkler 40, and a part of this distributed water is splashed from the vertical fin and the other part is After gradually flowing down the surface of the vertical fin 38, it is once vaporized and further re-condensed to form fog particles, each flowing along the air stream and flowing downstream. Further, the remaining water is returned to the circulation channel 16 from the vertical fins 38 through the water collecting pan 44, and ozone in the airflow is dissolved in this water and has a certain sterilizing power. The concentration of ozone is at most about 0.57 g / l, which is not much higher than that of high-pressure ozone water produced for sterilization. However, in the present invention, the air flow and water contact in the vaporizing humidifier 32. Since the sterilization of bacteria and algae spores in the airflow is performed by ultraviolet rays or ozone before the growth, the propagation of bacteria and algae in the circulation channel can be sufficiently suppressed even with such an amount of ozone.

  Next, water particles (mist particles or water droplets) released downstream from the vaporizing humidifier 32 dissolve water-soluble odorous substances such as ammonia in the airflow, and the water particles containing the odorous substances are cooled by the air cooling. The water is condensed by the unit 54 and drained to the outside through the drain pan 58 and the drain channel 62. On the other hand, water-insoluble odor substances such as methyl sulfide and methyl mercaptan pass through the vaporizing humidifier 32 as they are, and further reach the adsorption unit 70 through the air cooler 54 and the heating unit 66.

  In the adsorbing unit 70, the water-insoluble odor substance is adsorbed on the surface of the activated carbon, and is gradually decomposed by reacting with ozone in a stationary state by the adsorption. Here, since the water-soluble substance is previously removed upstream of the adsorption portion, sufficient adsorption and deodorizing power can be obtained for the water-insoluble substance.

  FIG. 5 is a flow diagram illustrating the process of deodorization and sterilization by the above-described apparatus according to the present invention.

  FIG. 6 is a flow chart illustrating the control procedure of the sterilization / deodorizing apparatus using the water-soluble odor substance concentration sensor 42, the water-insoluble odor substance concentration sensor 72, and the ozone concentration sensor 74 described above. When explaining ammonia as a representative of water-soluble odorous substances in odorous gas, when the ammonia concentration detected by the ammonia sensor exceeds 10 ppm, for example, the water supply valve for humidification is fully opened (opening degree 100%), and when it falls below, water supply Set the valve half open (opening 50%). In addition, for various water-insoluble odorous substances such as sulfur (S) and organic, when the concentration detected by the concentration sensor of the odorous substance (the odor sensor in the figure) exceeds the threshold, ultraviolet rays Of the ozone lamps that are light sources, the ratio of those that are lit is switched to large (for example, 100%), and when the ratio is below the threshold, the ratio of those that are lit is switched to small (for example, 50%). However, even when the concentration of the water-insoluble odor substance exceeds the threshold value, if the ozone concentration exceeds the reference value (0.01 ppm), the control is performed so that the ratio of the lit lamp is switched to a small value (50%).

  7 and 8 show a second embodiment of the present invention. In the present embodiment, the ultraviolet light source in the first embodiment is omitted, and ozone water is supplied to the vaporizing humidifier so that the function of the ozone supply means is provided. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as shown in FIG. 7, in the water supply mechanism 12, a gas-liquid mixer 80 is installed in a part of the feed path 16b of the circulating water path 16, and an ozone gas generator 82 is connected to the gas-liquid mixer. The ozone gas supplied from this ozone gas generator is dissolved in water flowing through the circulation water channel 16 at high pressure to produce ozone water, and this ozone water is supplied to the vaporizing humidifier 32 in the air passage 24 It is. In this configuration, when the ozone water supplied from the water supply mechanism 12 flows down the opposing surface of the vertical fin 38 from the sprinkler 40, the ozone is vaporized together with the flowing water. In this case, the opposed surfaces of the water sprinkler 40 and the vertical fins 38 become the ozone supply unit 26.

  FIG. 8 is a flowchart showing the sterilization and deodorizing action of the apparatus according to this embodiment.

  Regarding the contents of this flowchart, the difference from the first embodiment is that ozone is vaporized from the high-concentration ozone water supplied to the vaporizing humidifier 32, and the water-soluble odorous substance is dissolved in the ozone water and dissolved. The water is drained by condensation by a condensing coil or as it is. That is, in the example of FIG. 7, the water sent from the gas-liquid mixer 80 to the vaporizing humidifier 32 via the feed path 16b is used as a medium for carrying ozone, and the same water is used as the surface of the vertical fin 38 of the vaporizing humidifier. It is used as a medium for dissolving and transporting the water-soluble odorous substance until it is vaporized and condensed by the air cooler 54. Thus, in the present invention, water is saved compared to the case where water is separately used for the two purposes of ozone vaporization and odor substance dissolution / discharge, and the vaporizing humidifier is further used for the two purposes. Therefore, the structure of the apparatus can be simplified.

1 is a conceptual diagram of an entire air conditioning system to which an apparatus according to a first embodiment of the present invention is applied. 1 is a partially transparent perspective view of the apparatus. 1 is a plan view of the main part of the apparatus. FIG. 4 is a cross-sectional view of the main part of the apparatus of FIG. 1 is a flowchart of the flow of sterilization and deodorizing action of the apparatus. 1 is a flowchart showing the flow of control of the apparatus. It is a conceptual diagram of the whole air conditioning system to which the apparatus which concerns on the 2nd Embodiment of this invention is applied. 7 is a flowchart of the flow of sterilization and deodorizing action of the apparatus.

Explanation of symbols

2 ... Experimental animal house 4 ... Air exhaust passage 6 ... Circulating air passage 6a ... Suction port 6b ... Air outlet
10 ... Sterilization and deodorization device 12 ... Water supply mechanism 14 ... Water supply valve 16 ... Circulating water channel 16a ... Water tank
16b ... Transmission route 16c ... Return route 18 ... Outside air introduction route 20 ... Outside air introduction port 22 ... Blower fan
24 ... Air vent 26 ... Ozone supply 28 ... UV light source 30 ... Switch
32 ... Vaporizing humidifier 34 ... Frame body 34a ... Vertical frame plate 34b ... First horizontal frame plate
34c ... 2nd horizontal frame board 35 ... Frame port 36 ... Closure board 36a ... Intermediate side board part 36b ... Side obstruction board part
38 ... Vertical fins 40 ... Sprinkler 42 ... Water-soluble odor substance concentration sensor
44 ... Catchment pan 46, 47 ... Partition wall 48 ... Catchment hole 50 ... Auxiliary closing plate
54… Air cooler
58 ... Drain pan 60 ... Drain hole 62 ... Drain channel 66 ... Heating part 70 ... Suction part
72 ... Non-water-soluble odor substance concentration sensor 74 ... Ozone concentration sensor
76… Blower fan
80 ... Gas-liquid mixer 82 ... Ozone gas generator S ... Upstream surface of frame

Claims (8)

  In a sterilization / deodorization apparatus having an air passage in which an ozone supply unit and an adsorption unit for sterilization / deodorization are sequentially provided from the upstream side to the downstream side, water-soluble odorous substances in the airflow are separated from the ozone supply unit 26 and the adsorption unit 70. Dissolved in the water supplied to the air passage portion between them upstream of the adsorbing portion 70, provided so as to be able to be discharged out of the air passage with the water, and the adsorbing portion 70 was formed of a hydrophobic porous adsorbent such as activated carbon A sterilizing and deodorizing device characterized by that.   An ultraviolet light source 28 that also serves as a germicidal lamp is installed in the upstream portion of the air passage 24, and the installation location is used as an ozone supply unit 26. From the ozone supply unit toward the downstream, a vaporizing humidifier 32 and an air cooler 54 and the adsorbing unit 70 are sequentially installed to dissolve the water-soluble odorous substance in the suspended particles of water released from the vaporizing humidifier 32, and the suspended particles of water containing the odorous substance are removed from the air cooler. The sterilizing and deodorizing device according to claim 1, wherein the sterilizing and deodorizing device is provided so as to condense at 54 and drain the water outside the air passage through a drain pan 58 installed below the air cooler.     The vaporizing humidifier 32 is arranged with a plurality of vertical fins 38 spaced apart from each other and oriented parallel to the flow direction through a frame 34, and water is supplied from above the vertical fins 38 to supply each vertical fin 38. A part of the water flowing down the fin surface is vaporized in the air, and the remaining liquid is collected through a water collecting pan 44 below the vaporizing humidifier 32 and re-supplied to the vaporizing humidifier 32. The sterilizing and deodorizing apparatus according to claim 2, wherein the upstream surface S of the frame body 34 is configured to be irradiated with ultraviolet rays from the ultraviolet light source 28.     The frame 34 is composed of a pair of vertical frame plates 34a on both sides in the width direction of the air passage 24 facing each other, and horizontal frame plates 34b and 34c that connect both the frame plates. In the meantime, the vertical fins 38 supported by the horizontal frame plates 34b and 34c are juxtaposed, and also serve as bacteria trapping means from the upstream end of the frame 34 to the side inner surface of the ventilation path 24 and the ceiling surface side. The disinfection according to claim 3, characterized in that the blocking plate 36 for restricting the flow path is overhanged and a frame upstream surface S is formed by at least the upstream end surface of the vertical frame plate 34a and the upstream surface of the blocking plate 36. Cum deodorizer.     5. The sterilization according to claim 4, wherein the ultraviolet light source is provided so as to be able to irradiate ultraviolet rays on the upstream portion of the opposing surface of each adjacent vertical fin and the side inner surface of the vertical frame plate a. Cum deodorizer.   By supplying ozone water to the vaporizing humidifier 32 arranged in the upstream part of the air passage 24, the humidifying part of the vaporizing humidifier 32 is also used as the ozone supply part 26, and the vaporizing humidifier 32 and the adsorbing part The air cooler 54 is installed in the air passage portion between the water-soluble odor substance and the water-soluble odor substance dissolved in the suspended particles of water released from the vaporization type humidifier 32. 2. The sterilizing and sterilizing apparatus according to claim 1, wherein the suspended particles are condensed by the air cooler 54 and drained to the outside of the air passage through a drain pan 58 installed below the air cooler. Deodorizing device.     The vaporizing humidifier 32 is arranged with a plurality of vertical fins 38 spaced apart from each other and oriented parallel to the flow direction through a frame 34, and water is supplied from above the vertical fins 38 to supply each vertical fin 38. A part of the water flowing down the fin surface is vaporized in the air, and the remaining liquid is collected through a water collecting pan 44 below the vaporizing humidifier 32 and re-supplied to the vaporizing humidifier 32. The sterilizing and deodorizing device according to claim 6, wherein the sterilizing and deodorizing device is provided.     7. The adsorbing portion 70 is formed of an inorganic porous base material carrying an oxidant instead of the hydrophobic porous adsorbing material. The sterilizing and deodorizing device described.