JP2011072718A - Air cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaner which efficiently detoxifies and removes a harmful substance floating in the air and also is easily maintained. <P>SOLUTION: A first wet filter member 6 and a second wet filter member 7 having ventilation and liquid permeability are arranged at interval 18 in an air flow passage. A treatment liquid supply portion 13 is arranged at the upper part of the first wet filter member 6 i.e., on the upper surface of the filter member 6, which supplies a treatment liquid reacting with the harmful substance contained in the external air taken into the air flow passage and detoxifying the harmful substance. A treatment liquid tub 16 with an open upper end is arranged over a part from the lower part of the first wet filter member 6 to the lower part of the second wet filter member 7, so as to collect the treatment liquid leaching and dropping down onto the lower end surfaces of the filter members 6, 7. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air purification device, and more particularly to an air purification device suitable for purifying air containing a mist of a water-soluble harmful substance such as formalin.

  Conventionally, in order to remove fine substances such as dust and microorganisms floating in the air and clean the air, the air purification device has a structure that filters the fine substances by passing the air through a dry filter using activated carbon or the like. Various air purification apparatuses having a structure in which air is brought into contact with water to remove fine substances floating in the air by moving to the water side, or air purification apparatuses having both of these structures have been proposed. .

  For example, an “air cleaning device” described in Patent Document 1 is for removing sodium ions contained in sea breeze at a semiconductor factory in a coastal area, and sprays pure water on the filler from above by spraying. At the same time, external air is introduced from the bottom of the filler, and in the process of passing this air and pure water through the filler, sodium ions contained in the air are transferred to the pure water side to purify the air. A wet scrubber treatment device and a dry filter device comprising a prefilter, a medium performance filter, and a HEPA filter are provided, and the introduced air is circulated through the wet scrubber treatment device and the dry filter device in order to be purified. .

  Further, in the “air purifier” described in Patent Document 2, the filter sheet that has been sprinkled and wetted from the air sprinkler is rotated to remove coarse dust floating in the air introduced from the outside. The wet air filter section that is made to be captured by the sheet and the dry filter section disposed on the downstream side thereof are combined to clean the introduced air.

JP 7-96126 A JP 2000-126534 A

  For example, in an environment where formalin that is harmful to the human body is used for sterilization, such as an anatomy room or a pathology laboratory, formalin mist floats in the room and must be removed.

  However, as described above, conventional air purification in which air is purified by bringing air and water into contact with each other so that fine suspended substances contained in the air are physically adsorbed to water. In the apparatus, it is difficult to remove harmful substances such as formalin from the air, and when the water in which formalin is dissolved evaporates, the recovered formalin flows out into the indoor air again.

  On the other hand, the formalin contained in the air has been removed by filtering the air with a dry filter such as impregnated activated carbon, but it is necessary to change the filter frequently, and maintenance and filter replacement are required. There was a problem of increasing the cost.

  Therefore, the present invention aims to provide an air purification device that can solve the problems in the prior art as described above, can efficiently detoxify and remove harmful substances floating in the air, and can be easily maintained. To do.

  The air purifying apparatus of the present invention provided for the above purpose purifies the external air introduced into the air flow path by the air blowing means through the filtration filter incorporated in the air flow path. The first filter having air permeability and liquid permeability, the filtration filter being disposed at least near the inlet opening at the front end of the air flow path and with both front and rear surfaces through which air passes vertically. A wet filter member and a second surface having air permeability and liquid permeability, wherein the front and rear surfaces through which air passes are perpendicular to each other and the front surface faces the rear surface of the first wet filter member with a gap therebetween. The wet filter member is formed above, and above the first wet filter member, the upper end surface of the filter member reacts with harmful substances contained in the external air taken into the air flow path and harms it. Turn into A treatment liquid supply unit for supplying the treatment liquid is provided, and leaches out from the lower side of the first wet filter member to the lower side of the second wet filter member. A feature is that a treatment liquid tank having an open upper end is provided for collecting the falling treatment liquid.

  In the air purification device of the present invention, the first wet filter member is a laminate in which at least one treatment liquid diffusion layer is sandwiched across the entire cross section parallel to the front surface of the filter member at a portion near the front surface. The processing liquid supply unit is configured to supply the processing liquid to the processing liquid diffusion layer exposed on the upper end surface of the first wet filter member, and the processing liquid diffuses and permeates the entire filter member through the diffusion layer. It is desirable to be configured.

  Moreover, in the air purification apparatus of the present invention, the blower means is a blower that is disposed on the downstream side of the filtration filter of the air flow path and sucks the air in the air flow path and discharges it to the outside. Is housed inside the blower housing, and communicated with the blower housing via a hot air supply duct in the gap between the rear surface of the first wet filter member and the front surface of the second wet filter member in the air flow path. The air in the blower housing heated by the heat generated by the motor of the blower during operation is placed in the gap through the hot air supply duct. It is also desirable to be configured to be inhaled.

  Further, it is desirable that the filtration filter includes at least one dry filter member disposed behind the second wet filter member in the air flow path.

  According to the air purification apparatus of the first aspect of the present invention, the processing liquid supplied from the processing liquid supply unit to the upper surface of the first wet filter member permeates the filter member, and the air flow path is provided by the blowing unit. When external air introduced into the filter passes through this filter, it can be rendered harmless quickly by chemically reacting harmful substances contained in the air with the treatment liquid that has penetrated into the first wet filter member. .

  Then, harmless products and surplus processing liquid generated by the reaction with the processing liquid move downward in the first wet filter member by gravity, and are collected in the lower processing liquid tank from the lower surface of the filter member. . Further, the excess processing liquid that has oozed out to the rear surface side of the first wet filter member also travels along the vertical surface to fall into the processing liquid tank and is collected.

  Moreover, the process liquid and reaction production | generation which are contained in the air which passed the 1st wet filter member by the 2nd wet filter member arrange | positioned so that the front surface may oppose with a clearance gap between the back surface of the 1st wet filter member When the mist of the material passes through the second wet filter member, it is captured here, moves downward in the second wet filter member by gravity, and falls into the treatment liquid water tank from the lower surface to be collected. .

  Therefore, the processing liquid contained in the air can be removed as much as possible by passing the second wet filter member.

  Moreover, according to the air purification apparatus which concerns on the invention described in Claim 2, a process liquid diffusion layer spreads the process liquid supplied from a process liquid supply part over the whole cross section parallel to the front surface of a 1st wet filter member. Therefore, harmful substances contained in the air passing through the filter member can be more reliably and efficiently removed.

  Moreover, according to the air purification apparatus which concerns on the invention described in Claim 3, the noise which generate | occur | produces at the time of operation | movement of an apparatus can be reduced by accommodating the air blower in the inside of an air blower housing.

  Further, the blower housing heated by the heat generated by the motor of the blower using the negative pressure generated by the blower in the gap between the rear surface of the first wet filter member and the front surface of the second wet filter member in the air flow path. Since the air inside is introduced into the gap, when the air passes through the first wet filter member, it is possible to reduce the humidity that has increased in contact with the processing liquid, and from the intake hole. External air can be allowed to flow into the blower housing to cool the blower motor.

  Furthermore, according to the air purification device of the invention described in claim 4, since at least one dry filter is provided behind the second filter member, a slight amount of moisture remaining in the air exiting the second filter member and Harmful substances can be removed more completely.

It is a top view which shows one Embodiment of the air purification apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows the AA cross section of FIG. It is a perspective view which shows schematic structure of the 1st wet filter member and the process liquid supply part which supplies a process liquid to the said wet filter member. It is a longitudinal cross-sectional view which shows the internal structure of a 1st wet filter member.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the air purification device of the present invention, FIG. 2 is a longitudinal sectional view showing a cross section AA of FIG. 1, and the air purification device 1 shown in these drawings is A device suitable for purifying indoor air that uses formalin for sterilization such as a dissection room or a pathology laboratory, and includes a filter housing 2 having a plurality of filtration filters and a blower housing having a blower 3 (blowing means). 4 is provided.

  The filter housing 2 has an inlet 2 </ b> A for taking in external air at the front end thereof, and an outlet 2 </ b> B connected to the intake port of the blower 3 by a connecting pipe 5 at the rear end thereof. Yes.

  In the filter housing 2, an air flow path that communicates between the inlet 2 </ b> A and the outlet 2 </ b> B is formed. By sucking the air inside the outlet 2 </ b> B from the outlet 2 </ b> B side by the blower 3, the filter housing 2. In the process in which the external air that has flowed into the air passes through a plurality of filtration filters disposed in the middle of the air flow path, harmful substances and dust contained therein are removed.

  In the present embodiment, these filtration filters are also arranged in the same way behind the first wet filter member 6 that is arranged with both front and rear surfaces through which air passes close to the inlet 2A of the air flow path being vertical. The second wet filter member 7 and the dry filter members 8 and 9 disposed behind the second wet filter member 7.

  As shown in FIGS. 3 and 4, the first wet filter member 6 is accommodated in a rectangular filter frame 6 </ b> A that fits into an air flow path having a rectangular cross section formed inside the filter housing 2. Yes. In this embodiment, wire mesh 6B is stretched on both front and rear surfaces of the filter frame 6A, and the wet filter member 6 is held in the filter frame 6A.

  As shown in FIG. 2, the filter frame 6 </ b> A is held by rail-like filter holding portions 10 provided on the upper and lower sides of the filter housing 2. Although not shown, an opening that is hermetically sealed by a detachable lid 11 shown in FIG. 1 is formed on one side wall of the filter housing 2. One filter member 6 can be pulled out to the side of the filter housing 2 together with the filter frame 6A and replaced with a new one.

  Further, as shown in FIG. 3, the seal member 6C is bonded over the entire rear peripheral surface of the filter frame 6A. As shown in FIG. 2, when the filter frame 6A is held by the upper and lower filter holding portions 10, the entire inner wall of the filter housing 2 is arranged so that the seal member 6C is opposed to this by a pressing mechanism (not shown). It is pressed against the front surface of the filter frame receiving portion 12 provided over the circumference, and the space between the outer peripheral surface of the filter frame 6A and the inner wall surface of the filter housing 2 is sealed.

  As shown in FIG. 4, the first wet filter member 6 is configured as a laminate in which a treatment liquid diffusion layer 6E is sandwiched between filter layers 6D. The treatment liquid diffusion layer 6 </ b> E is sandwiched across the entire cross section parallel to the front surface in the filter layer 6 </ b> D near the front surface of the first wet filter member 6.

In this embodiment, a non-woven fabric having air permeability and liquid permeability such as polyester, polyimide, glass fiber, etc. is used for the filter layer 6D.
On the other hand, the treatment liquid diffusion layer 6E is formed by wrapping a part from the front side to the rear side of a sponge sheet made of thin foamed polyurethane or the like with gauze, and the same air permeability and liquid permeability as the filter layer 6D can be obtained. In addition, the effect of quickly diffusing moisture that has penetrated into a part is enhanced.

  The upper end of the treatment liquid diffusion layer 6E is provided at a position facing directly below the slit 6G that opens in the longitudinal direction of the bottom of the receiving groove 6F formed across the entire width in the transverse direction of the upper side of the filter frame 6A. .

  On the other hand, in the filter housing 2, a liquid supply nozzle tube 13 as a processing liquid supply unit is horizontally provided at a position directly above the receiving groove 6F. As shown in FIG. 3, the liquid supply nozzle tube 13 is formed to have substantially the same length as the receiving groove 6 provided on the upper side of the filter frame 6A, and both ends thereof are closed.

  In addition, as shown in FIG. 4, a plurality of nozzle holes 13 </ b> A are opened at regular intervals in the longitudinal direction at the lower part of the liquid supply nozzle tube 13. One end of the liquid supply pipe 14 is connected to the front side of the central position in the longitudinal direction of the liquid supply nozzle pipe 13.

  As shown in FIGS. 1 and 2, the other end of the liquid supply pipe 14 is connected to the discharge side of the pump 15 installed on the floor surface at the lower front end side of the filter housing 2. On the other hand, a processing liquid tank 16 having an open upper surface is provided at a portion near the front of the bottom of the filter housing 2.

  The treatment liquid is stored in the treatment liquid tank 16, and in this embodiment, a sodium sulfite aqueous solution having a concentration of 0.12 mol to 0.15 mol is used as the treatment liquid. One end of the liquid supply pipe 17 shown in FIG. 1 is connected to the processing liquid tank 16, and the other end is connected to the suction side of the pump 15.

  With this structure, when the pump 15 is operated, the processing liquid stored in the processing liquid tank 16 is sucked into the pump 15 through the liquid supply pipe 17 and from here through the liquid supply pipe 14 to the liquid supply nozzle pipe. 13 and flows out from the plurality of nozzle holes 13A arranged in the longitudinal direction into the receiving groove 6F of the filter frame 6A as shown in FIG.

  The processing liquid that has entered the receiving groove 6F is supplied to the upper end of the processing liquid diffusion layer 6E through the slit 6G, but the processing liquid that has reached the processing liquid diffusion layer 6E quickly diffuses and permeates throughout the layer. From here, it further penetrates into the filter layer 6D in contact with both front and rear surfaces.

  As described above, since the nonwoven fabric excellent in air permeability and liquid permeability is used for the filter layer 6D constituting the first wet filter member 6, the blower 3 is operated and the filter housing is operated. Sulfurous acid, which is a treatment liquid in which harmful formalin mist contained in the external air permeates the filter layer 6D when the external air taken in from the inlet 2 passes through the filter layer 6D. It reacts in contact with aqueous sodium solution and is rendered harmless.

  Since a new processing liquid is continuously supplied to the filter layer 6D through the processing liquid diffusion layer 6E, excess processing liquid moves downward in the filter layer 6D due to the action of gravity and starts from its lower end surface. It exudes and is collected by flowing down into the processing liquid tank 16 through an opening provided in the lower side portion of the filter frame 6A.

  On the other hand, the second wet filter member 7 does not have a treatment liquid diffusion layer, and has the same air permeability and liquid permeability as the filter layer 6D used in the first wet filter member 6. It is comprised by the filter layer using.

  Although the detailed description and illustration are omitted, the second wet filter member 7 is placed in a filter frame in which metal meshes are provided on both the front and rear sides through which air flows, in the same manner as the first wet filter member 6 described above. In addition, the second filter member 7 that has been used is removed together with the filter frame to the side of the filter housing 2 and can be replaced with a new one.

  The second wet filter member 7 is provided to remove the treatment liquid contained in the air that has passed through the first wet filter member 6 and is moistened with the treatment liquid. The second wet filter member The processing liquid absorbed when air passes through the filter 7 moves downward in the filter layer by the action of gravity, and reaches a position beyond the lower part of the second wet filter member 7 as shown in FIG. It falls into the processing liquid tank 16 and is collected.

  Further, in the present embodiment, the dry filter members 8 and 9 are made of activated carbon or impregnated activated carbon as a filter material. The two dry filter members 8 are used in layers, and the latter dry filter member 9 is the former. One piece is attached apart from the thing.

  On the other hand, the blower housing 4 incorporating the blower 3 is formed in a box shape in which a sound absorbing material is lined, and an intake hole 4A for taking in external air is provided at a lower position of the rear wall surface. Yes.

  Further, a hot air discharge hole 4B is provided at the upper position of the front wall surface of the blower housing 4, where the outlet side is the rear surface of the first wet filter member 6 in the air flow path inside the filter housing 2, and An inlet side of a hot air supply duct 19 communicating with a space formed by a gap 18 between the front surface of the second wet filter member 7 is connected.

  As shown in FIG. 2, a muffler duct 20 is integrally provided on the upper surface of the blower housing 4 so as to surround the exhaust port 3 </ b> A of the blower 3 and have a sound absorbing material lined on the inside. The silencer duct 20 is provided with an air outlet 20A having a louver.

Next, the operation of the air purification device 1 configured as described above will be described.
In addition, before operating the air purification apparatus 1, the process liquid is previously inject | poured into the process liquid tank 16 of the air purification apparatus 1 from the supply port which is not shown in figure, and is stored.

  When a power switch (not shown) provided in the air purification device 1 is operated, the motor 3B of the blower 3 is energized to drive the blower 3 and the operation of the pump 15 is started. Then, the pump 15 sucks the processing liquid in the processing liquid tank 16 through the liquid supply pipe 17 and further supplies it to the liquid supply nozzle pipe 13 through the liquid supply pipe 14.

  The processing liquid flowing into the liquid supply nozzle tube 13 in this way is received at the upper part of the filter frame 6 of the first filter member 6 from the plurality of nozzle holes 13A shown in FIG. It flows down into the groove 6F.

  The processing liquid supplied into the receiving groove 6F further flows down on the processing liquid diffusion layer 6E exposed on the upper surface of the first wet filter member 6 through a slit 6G continuous in the lower longitudinal direction. To do.

  In the present embodiment, the receiving groove 6 has a wide cross-sectional shape with a wide upper portion and a narrow slit 6G, and the treatment liquid flowing down from the plurality of nozzle holes 13A is temporarily here. Therefore, the amount of the treatment liquid flowing out from the slit 6G becomes substantially uniform in the longitudinal direction.

  Thus, the processing liquid supplied to the upper end of the processing liquid diffusion layer 6E diffuses throughout the layer while moving downward in the layer due to the action of gravity, and further permeates into the front and rear filter layers 6D adjacent thereto. .

  On the other hand, the external air taken into the filter housing 2 from the inlet 2A by the operation of the blower 3 flows into the first wet filter member 6 from the wire mesh 6B covering the front surface, but passes through the inside. In between, it contacts with the processing liquid which has penetrated into filter layer 6D and processing liquid diffusion layer 6E.

  As a result, formalin mist contained in the air taken in from the outside is detoxified by chemical reaction with sodium sulfite in the treatment liquid, and the air that has passed through the first wet filter member 6 becomes the second It flows into the space of the gap 18 with the wet filter member 7.

  In this embodiment, the space of the gap 18 communicates with the inside of the blower housing 4 by the hot air supply duct 19 as described above, and when the air passes through the first wet filter member 6. Since the pressure is lower than the atmospheric pressure by the pressure drop due to the flow resistance, air inside the blower housing 4 flows into the space in the gap 18 through the hot air supply duct 19.

  Since the air inside the blower housing 4 is warmed by the heat generated by the motor 3B of the blower 3, the high-temperature air flows into the gap 18 and passes through the first wet filter member 6 to get wet. The relative humidity of air can be lowered.

  On the other hand, when the air inside the blower housing 4 is sucked out from the warm air discharge port 4B to the warm air supply duct 19, new air outside from the intake hole 4A provided at the rear end is blown into the blower housing 4. Since it flows naturally, the temperature in the blower housing 4 does not rise excessively due to the heat generated by the motor 3B.

  Thus, the air that has passed through the first wet filter member 6 merges with the air in the blower housing 4 and passes through the second wet filter member 7. In this process, the second wet filter member 7 captures and removes the treatment liquid slightly remaining in the air.

  Since the rear surface of the first wet filter member 6 and the front surface of the second wet filter member 7 are separated by the gap 18, the rear surface of the first wet filter member 6 oozes out from the inside of the filter layer 6D. The surplus processing liquid that has flown down to the processing liquid tank 16 along the rear surface is collected and does not get wet by being transmitted to the second wet filter member 7 side.

  Further, since the processing liquid is continuously supplied to the first wet filter member 6 by the pump 15 while the air purification apparatus 1 is in operation, the excess processing liquid in the wet filter member 6 is reduced by gravity. As a result of the above, it exudes from the lower end surface of the filter layer 6D and the treatment liquid diffusion layer 6E, flows down into the treatment liquid tank 16 below, and is collected and used repeatedly.

  Further, the moisture of the processing liquid absorbed in the second wet filter member 7 also moves downward gradually due to the action of gravity, oozes to the lower surface thereof, flows down into the processing liquid tank 16 and is collected. .

  The air that has passed through the first wet filter member 7 further passes through the dry filter members 8 and 9. These dry filter members 8 and 9 are mainly provided for removing trace amounts of formalin and moisture that could not be removed in the process of passing through the first and second wet filter members 6 and 7. For the purpose of removing formalin, it is desirable to use impregnated activated carbon.

  Thus, the air purified through the dry filter member 9 on the most downstream side is sucked into the blower 3 through the connection pipe 5 from the outlet 2B of the air flow path in the filter housing 2, and the silencer duct 20 is discharged from the exhaust port 3A. Through the air outlet 20A.

  In addition, although the air purification apparatus 1 in embodiment mentioned above incorporates the dry-type filter members 8 and 9 behind the 2nd wet-type filter member 7, one dry-type filter member may be sufficient as a dry-type filter member. It may be omitted and the filtration filter may be composed of only the first and second wet filter members 6 and 7.

  Furthermore, in the thing of embodiment mentioned above, although the one process liquid diffusion layer 6E is integrated in the 1st wet filter member 6, this invention is not limited to this, The 1st wet filter member is The treatment liquid diffusion layer may be configured as a laminate in which a plurality of layers parallel to the front surface of the filter member are sandwiched between portions near the front surface. In this case, it is desirable that the processing liquid supply unit has a structure capable of dispersing and supplying the processing liquid to all of the processing liquid diffusion layers exposed on the upper end surface of the first wet filter member.

  In the case of the above-described embodiment, the processing liquid stored in the lower processing liquid tank 16 is pumped up by the pump 15 and supplied to the liquid supply nozzle tube as the processing liquid supply unit for circulation. The processing liquid collected in the processing liquid tank may be discarded without being reused, and a new processing liquid may be constantly supplied from the processing liquid supply unit to the first wet filter member.

  If the first wet filter member is made of a filter material having a function of quickly diffusing moisture penetrating into a part in addition to good air permeability and liquid permeability, A structure in which the liquid diffusion layer is omitted may be employed. In this case, it is desirable that the processing liquid supply unit has a structure that can uniformly supply the processing liquid over the entire upper end surface of the first wet filter member.

  Moreover, in the air purification apparatus 1 in the embodiment described above, an aqueous sodium sulfite aqueous solution is used as the treatment liquid in order to remove formalin from the air containing formalin mist and thereby detoxify it. The treatment liquid used for the treatment is not limited to this. By using various treatment liquids depending on the type of the substance floating in the air, for example, air containing various harmful substances such as hydrochloric acid and sulfuric acid mist. Can be efficiently purified.

  Furthermore, the air purification apparatus 1 in the above-described embodiment forms the air heated in the blower housing 4 through the hot air supply duct 19 in the gap 18 between the first wet filter member 6 and the second wet filter member 7. However, the hot air supply duct 19 is not necessarily provided.

  In this case, the amount of air inflow from the inlet 2A of the filter housing 2 can be increased and the filtration efficiency in the first wet filter member 6 can be increased. However, the humidity of the air on the downstream side of the first wet filter member 6 is increased. Therefore, if necessary, heating means such as an electric heater may be provided in the gap 18 to increase the temperature of the air passing therethrough and to decrease the relative humidity. Further, it is desirable to appropriately suppress the temperature rise in the blower housing 4 by a method such as circulating external air.

  When the hot air supply duct 19 is not used, instead of connecting the blower 3 to the end of the air flow path where the filter is provided, that is, the outlet side of the filter housing 2, the start end of the air flow path is provided. You may connect the exhaust port of the air blower 3 to the side, ie, the inlet 2A side.

  In this embodiment, the air blower 3 having a structure in which the motor 3B is integrally provided is used as the air blowing means. However, the air blowing means is not limited to this, and for example, a blower fan is incorporated. The blower main body and the motor may be arranged at positions separated from each other, and the rotation of the motor may be transmitted to the blower fan of the blower main body by belt transmission or the like.

  The air purification apparatus of the present invention detoxifies the air in a room where harmful substances that cannot be purified by a normal air purification apparatus are generated, for example, an anatomical room using formalin or various laboratory rooms where hydrochloric acid or sulfuric acid mist is generated. It can be widely used as an air purification device for this purpose.

DESCRIPTION OF SYMBOLS 1 Air purification apparatus 2 Filter housing 2A Inlet 2B Outlet 3 Blower (blower means)
3B Motor 3A Exhaust port 4 Blower housing 4A Intake hole 4B Hot air discharge hole 4B
DESCRIPTION OF SYMBOLS 5 Connection pipe 6 1st wet filter member 6A Filter frame 6B Wire net 6C Seal member 6D Filter layer 6E Process liquid diffusion layer 6F Receiving groove 6G Slit 7 2nd wet filter member 8, 9 Dry filter member 10 Filter holding part 11 Cover 12 Filter frame receiving part 13 Liquid supply nozzle tube (Processing liquid supply part)
13A Nozzle holes 14, 17 Supply pipe 15 Pump 16 Treatment liquid tank 18 Clearance 19 Hot air supply duct 20 Silencer duct 20A Air outlet

Claims (4)

An air purification device for purifying external air introduced into an air flow path by a blowing means through a filtration filter incorporated in the air flow path,
The filtration filter includes a first wet filter member having air permeability and liquid permeability, disposed at least near the inlet opening at the front end of the air flow path, with both front and rear surfaces through which air passes perpendicularly arranged, and air It is composed of a second wet filter member having air permeability and liquid permeability, the front and rear surfaces passing through each other being vertical and the front surface being arranged to face the rear surface of the first wet filter member with a gap. ,
In order to supply a treatment liquid that reacts with the harmful substances contained in the external air taken into the air flow path at the upper end surface of the filter member and renders it harmless above the first wet filter member The processing liquid supply section is provided, and the processing liquid that oozes and falls to the lower end surface of these filter members from the lower side of the first wet filter member to the lower side of the second wet filter member is recovered. An air purification apparatus characterized in that a treatment liquid tank having an open upper end is provided.   The first wet filter member is configured as a laminate in which at least one treatment liquid diffusion layer is sandwiched across the entire cross section parallel to the front surface of the filter member at a portion near the front surface, and the treatment liquid supply unit is The processing liquid is supplied to the processing liquid diffusion layer exposed at the upper end surface of the first wet filter member, and the processing liquid is configured to diffuse and permeate the entire filter member through the diffusion layer. The air purifier according to claim 1, wherein The blower means is a blower that is arranged on the downstream side of the filtration filter of the air flow path, sucks the air in the air flow path, and discharges it outside.
The blower is housed inside the blower housing, and the blower housing has a hot air supply duct interposed between the rear surface of the first wet filter member and the front surface of the second wet filter member in the air flow path. Are provided with hot air exhaust holes that communicate with each other and intake holes for taking in external air,
The air in the blower housing warmed by heat generated by the blower motor during operation is configured to be sucked into the gap through the hot air supply duct. Air purification equipment.   The air filter according to any one of claims 1 to 3, wherein the filtration filter includes at least one dry filter member disposed behind the second wet filter member in the air flow path. apparatus.

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