JPH11276823A - Antibacterial filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exterminate/remove bacteria contained in air flowing in the ventilation passage of an air conditioner. SOLUTION: In an antibacterial filter 1 which is arranged in the ventilation passage of an air conditioner and exterminates/removes bacteria in air, nonwoven fabrics 3, 4 which are impregnated or incorporated with an iodinated disinfectant resin are stuck on both surfaces of a medium performance filter 2. In this constitution, bacteria contained in air can be caught surely by the medium performance filter 2, and the caught bacteria are exterminated/removed by contact with iodine. In this way, bacteria can be removed at a nearly 100% removal ratio so that troubles of secondary infection, or the like, in hospitals, or the like, can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial filter which is disposed on an air path such as a duct and an air inlet of an air conditioner and kills and removes bacteria contained in the air.

[0002]

2. Description of the Related Art Generally, in a hospital, a filter for disinfection is attached to an air conditioner in order to prevent hospital-acquired infection, and the air in the room is successively washed and filtered by the filter to be included in the air. Bacteria that have been killed. Conventionally, as such a sterilizing filter, a filter in which a fungicide is stuck on the surface of a HEPA filter, a filter in which a silver-based antibacterial material is stuck on the surface of a medium-performance filter or a HEPA filter, the surface of a HEPA filter, A photocatalyst filter is adhered to the photocatalyst filter and sterilized by irradiating the photocatalyst filter with ultraviolet rays. However, each of the above filters can remove bacteria in the air with a certain collection efficiency, but cannot remove 100%. Therefore, the bacteria that could not be removed floated in the room again, causing secondary infection.

[0003] Also, iodine is known as a chemical having a strong bactericidal action, and as a conventional example of a germicidal filter using a bactericide containing iodine, for example, Japanese Utility Model Laid-Open No. 57-5842.
The one described in No. 5 microfilm (hereinafter referred to as a conventional example) is known. FIG. 7 is an explanatory view showing the contents described in the conventional example. As shown in FIG. 7, the filter is constituted by fixing a support body 102 made of an iodine-absorbing plastic on both sides of a fiber assembly filter medium 101 in a sandwich shape. doing. Therefore, as is well known, iodine has a bactericidal action, and when air passes through the filter, bacteria in the air come into contact with iodine and are sterilized.

However, the filter for sterilization shown in the above-mentioned conventional example has a structure in which iodine is attached to the fiber aggregate filter medium 101. Therefore, if this filter is installed inside a duct of an air conditioner, for example, the filter is contained in the air. Bacteria will pass through the filter at approximately the same speed as the airflow, and while contacting the iodine component with the filter,
Since the contact time is short, it is not possible to actually sterilize and remove all bacteria present in the air, and there is a drawback that bacteria pass through at a fixed rate.

[0005]

As described above, in the conventional filter for sterilization, although an iodinated bactericide resin having a strong bactericidal action is used, the time for bacteria to pass through the filter is short. In fact, it was not possible to sterilize and remove all bacteria, so bacteria that were not sterilized would float in the air again, causing problems such as secondary infection in hospitals and the like. .

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an antibacterial filter capable of reliably killing and removing bacteria contained in air. Is to do.

[0007]

According to a first aspect of the present invention, there is provided an antibacterial filter disposed in a ventilation path of an air conditioner for killing and removing bacteria in the air. It is characterized in that a nonwoven fabric impregnated or impregnated with a chemical disinfectant resin is attached to at least one surface of a medium-performance filter. The invention according to claim 2 is an antibacterial filter that is disposed in an air passage of an air conditioner and kills and removes bacteria in the air. A laminate is formed on at least one surface of the laminate, and the laminate is bent in a zigzag cross section and disposed.

According to a third aspect of the present invention, there is provided an antibacterial filter which is disposed in a ventilation path of an air conditioner and kills and removes bacteria in the air. A flat nonwoven fabric impregnated with or attached to an iodinated germicide resin is attached to at least one of the rear side and the rear side. According to a fourth aspect of the present invention, there is provided an antibacterial filter that is disposed in an air passage of an air conditioner and kills and removes bacteria in the air, the front side and the rear side of a medium-performance filter configured to bend in a zigzag cross section. Characterized in that a nonwoven fabric having a corrugated cross section impregnated or impregnated with an iodinated germicide resin is attached to at least one of them. The invention according to claim 5 is characterized in that the iodinated bactericide resin is obtained by contacting and adsorbing chlorine on a strongly basic anion exchange resin, and reacting with chlorine ions of a strongly basic anion exchange resin provided in the form of chloride. It is an iodized demand-type disinfectant resin produced by exchanging iodide ions.

According to the present invention configured as described above, at least one of the front side and the rear side of the medium performance filter includes:
Since the nonwoven fabric impregnated or impregnated with iodine is disposed, bacteria contained in the air can be reliably captured by the medium-performance filter. After that, the captured bacteria come into contact with the iodinated bactericide resin, and as is well known, iodine has an extremely strong bactericidal action. Contact will surely kill and remove.

Further, if the laminated body of the medium performance filter and the nonwoven fabric is formed in a zigzag cross section, the surface area of the filter can be increased, so that the efficiency of removing bacteria can be further improved. Furthermore, if only the medium-performance filter has a zigzag cross-sectional shape and the nonwoven fabrics arranged on both sides have a linear cross-sectional shape or a corrugated cross-sectional shape, the filter can be simplified.

Further, by using an iodinated demand type bactericide resin as the iodinated bactericide resin, bacteria and the iodine component can be more efficiently contacted,
Many bacteria can be killed and eliminated with less iodine.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a configuration of an antibacterial filter according to a first embodiment of the present invention. As shown in FIG. 1, the antibacterial filter has a medium performance in which a cross section is bent in a zigzag shape. A laminated structure of a filter 2 and iodine-containing filters 3 and 4 that are arranged on both sides of the medium-performance filter, also have a zigzag cross section, and are configured as a nonwoven fabric impregnated or impregnated with an iodinated germicide resin. It is configured. Here, impregnation means immersing the nonwoven fabric in the iodinated germicide resin, and impregnation means attaching the iodinated germicide resin to the nonwoven fabric.

A frame 5 is arranged so as to surround the periphery of the antibacterial filter 1, and the whole is constituted as a filter unit 8. An adhesive 6 is filled between the frame 5 and the antibacterial filter 1 to be hermetically connected, and further, a packing material 7 is attached to one side of the frame 5. It can be installed hermetically in a duct or the like. Also,
In order to support the laminated structure of the medium-performance filter 2 and the iodine-containing filters 3 and 4 configured in a zigzag cross section,
The support rods 9 are respectively arranged in the zigzag “valleys”. Further, as the medium-performance filter 2, a filter having a glass fiber filter paper or a laminated structure of a glass fiber filter paper and a synthetic fiber filter paper can be used.

FIG. 2 is an explanatory view showing a state in which the above-mentioned filter unit 8 is mounted on an air conditioner. As shown in FIG. 2, this air conditioner has a filter unit 8 installed at an appropriate position in a ventilation path. . That is, a suction port 12 for discharging indoor air to the outside is formed in a side surface portion 11a of a room 11 to be subjected to air purification, and the air sucked from the suction port 12 and the outside air duct 13 is pre-filtered. 14, a filter unit 8, a cooling / heating water coil 15, and a guide 16 for an air circulation.
Through the air outlet 18 of the ceiling 11b in the room 11. As a result, the air sucked from the inside of the room 11 is dust-removed by the pre-filter 14,
Bacteria are sterilized and removed by the filter unit 8,
Further, by passing through the cold / hot water coil 15, it is cooled or heated and guided to the outlet 18.

Next, the operation of the antibacterial filter 1 (see FIG. 1) will be described.
Since the medium-performance filter 2 is disposed at the center of the laminated structure, the medium-performance filter 2 captures bacteria in the air. And since the iodine-containing filters 3 and 4 containing the iodinated germicide resin are respectively arranged in a sandwich shape on the front side and the back side of the medium-performance filter 2, bacteria caught by the medium-performance filter 2 are The iodine-containing filters 3 and 4 come into contact with the filter for a long time, and the bacteria are surely killed and removed. Actually, since the disinfection works more effectively when the fan 16 is stopped than when the fan 16 is operating, a case where the fan 16 is operated at daytime and stopped at night. In the method, bacteria caught in the daytime can be surely killed by touching the iodine-containing filters 3 and 4 for a long time at nighttime.

FIG. 3 is an explanatory view showing an example in which the filter unit 8 is arranged inside a duct 21 for air conditioning.
As shown in FIG. 1, the filter unit 8 is surrounded by the frame 5 and the packing material 7 is attached, so that the filter unit 8 is tightly closed with respect to the bracket 22 formed in the duct 21. The airflow can be reliably passed through the antibacterial filter 2.

As described above, in the antibacterial filter according to the present embodiment, since the iodine-containing filters 3 and 4 are arranged on both the front side and the back side of the medium-performance filter 2, the medium-performance filter 2 The bacteria contained therein can be reliably captured, and the captured bacteria can be reliably sterilized by being in contact with the iodine-containing filters 3 and 4 for a long time. Therefore, it is possible to solve the problem that bacteria are suspended again in the room as in the related art, and it is possible to effectively prevent the occurrence of secondary infection in hospitals and the like. In addition, since the laminated body including the medium-performance filter 2 and the iodine-containing filters 3 and 4 is formed in a zigzag cross section, the surface area of the laminated body can be increased, and the efficiency of capturing bacteria can be improved.

In the above description, an example has been described in which the iodine-containing filters 3 and 4 are provided on both the front side and the back side of the medium-performance filter 2. However, the iodine-containing filter is provided only on one of the front side and the back side. It is good also as a structure which installs a containing filter.

Next, the iodine-containing filters 3 and 4 are impregnated,
As the impregnated iodinated fungicide resin, US Pat.
As described in 431908, 3923665, and 4238765, an iodinated demand type that sterilizes bacteria and microorganisms with a small amount of iodine and does not leak unnecessary iodine to the outside. It is preferred to use a (demand release) disinfectant resin.

Further, granular beads are formed from the above-mentioned iodinated demand-type disinfectant resin, and the granular beads are attached to both sides or one side of a non-woven fabric using an adhesive to form an iodine-containing filter. It is also possible.
The iodinated demand type fungicide is specifically obtained, for example, as follows.

A) The raw granular resin is contacted with an aqueous slurry of iodine and potassium iodide to obtain a paste-like mixture. Iodine is substantially present as triiodide ion in the sludge, and the raw material resin is a strong basic anion exchange resin having a strong basic group in the form of a salt having an anion exchangeable with triiodide ion. is there. In addition, the iodinated demand-type disinfectant resin has a strong basic anion exchange resin that adsorbs chlorine and exchanges chlorine ion and triiodide ion of the strong basic anion exchange resin provided in the form of chloride. It can also be manufactured.

B) Next, the paste-like mixture is placed in a closed vessel or a reaction vessel (for example, an autoclave) for a predetermined impregnation time while maintaining a space in the reaction vessel so that contact occurs in an iodine atmosphere. Process with conditions. c) washing the resulting iodide-resin product with a washing liquid (eg, deionized water, R / O water, etc.)
In order to prevent iodine (KI) from depositing on the surface of the iodine / resin body during drying, iodine eluted in water such as KI is removed from the resin surface. Here, the R / O water is water obtained by a double reverse osmosis method.

FIG. 4 shows a second example of the antibacterial filter according to the present invention.
It is an explanatory view showing the embodiment, and in this embodiment, iodine-containing filters 23 and 24 are arranged in a plane on both the front side and the back side of the medium-performance filter 2 formed in a zigzag cross section. The frame 5 is the same as in the first embodiment described above, and is hermetically fixed with an adhesive 6. According to such a configuration, the bacteria in the air can be captured by the medium performance filter 2 as in the first embodiment described above, and the captured bacteria can be captured on the front surface of the medium performance filter 2. Since it is in contact with the iodine-containing filters 23 and 24 arranged on the side and the back side for a long time, it is sterilized.

Therefore, the same effects as in the first embodiment can be obtained, and further, each of the iodine-containing filters 23, 24
Is formed in a planar shape, so that the processing is easy, and since the support rod 9 is not used, the configuration can be simplified. As in the first embodiment, more efficient sterilization is possible by using an iodinated demand type resin as the iodinated germicide resin for forming the iodine-impregnated filters 23 and 24. And
The amount of the leaking iodine component can be reduced. Further, similarly to the first embodiment, the configuration may be such that the iodine-containing filter is installed only on one of the front side and the back side of the medium performance filter 2.

FIG. 5 shows a third embodiment of the antibacterial filter according to the present invention.
As shown in the figure, in this embodiment, iodine-containing filters 25 and 26 are arranged on the front side and the back side of the medium-performance filter 2 having a zigzag cross section, respectively. And the filters 25 and 26
Has a corrugated cross section. According to such a configuration, the same effects as those of the first embodiment can be obtained, and since the cross-sectional shape of the iodine-containing filters 25 and 26 is corrugated, the surface area becomes large and processing is easy. There is an advantage that there is.

[0026]

Next, the result of actually removing bacteria in the air by using the antibacterial filter shown in the first embodiment will be described. FIG. 6 is an explanatory diagram showing an experimental device for measuring the bacteria elimination efficiency when the antibacterial filter is used. In this experimental device, as shown in FIG. Inside the duct 32, a sterilization filter 33, an antibacterial filter 8 to be tested, and a post-processing filter 34 are installed in this order from the upstream side. Then, an aerosol supply port 35 is formed between the sterilizing filter 33 and the antibacterial filter 8, and bacteria are supplied from the aerosol supply port 35. That is, the bacterial suspension is atomized by a medical sprayer, and the generated mist is supplied from the aerosol supply port 35 into the duct 32.

Then, aerosol measuring ports 36 and 37 are formed on the upstream and downstream sides of the antibacterial filter 32, respectively.
At 6, 37, the air inside the duct 32 can be sucked using an air sampler. Therefore, bacteria in the air can be captured at each of the aerosol measurement ports 36 and 37. In this experiment, the bacteria captured at each of the measurement ports 36 and 37 are cultured in a thermostat at 37 ° C. for 24 hours. After that, the generated colonies were counted, and the efficiency of capturing bacteria was calculated from the number of bacteria on the upstream and downstream sides of the antibacterial filter 8. As the iodine-containing filter used in the antibacterial filter 32 used in this experiment, a filter obtained by impregnating a nonwoven fabric with the above-described iodinated demand type resin was used.

On the other hand, as a comparative example with respect to the present embodiment, as described below, five kinds of commercially available antibacterial filters which do not use the iodinated germicide resin were selected and subjected to the same experiment as described above. <Comparative Example 1> A structure in which a fungicide is attached to a HEPA filter <Comparative Example 2> A medium-performance filter in which a silver-based (amenitop) antibacterial agent is attached <Comparative Example 3> Silver in a HEPA filter Comparative Example 4 A composition in which a photocatalyst is attached to a HEPA filter <Comparative Example 5> A composition in which an antibacterial agent composed of silver and manganese is attached to a HEPA filter

Then, the efficiency of capturing bacteria was measured using the filters of the present example and the respective comparative examples.
The results as shown in Table 1 were obtained.

[0030]

[Table 1]

As can be understood from Table 1, when the antibacterial filter of the present invention in which the nonwoven fabric impregnated or impregnated with the iodinated bactericide resin is attached to both surfaces of the medium-performance filter is used, almost 100% of the filter is removed. Bacteria in the air are efficiently removed, and when the antibacterial filter of each comparative example that does not use the iodinated bactericide resin is used, 100% removal efficiency is obtained although high removal efficiency is exhibited. Can not do.

[0032]

As described above, the antibacterial filter of the present invention has an iodinated germicide on both the front side and the back side of a medium-performance filter capable of reliably capturing bacteria existing in the air. Since the nonwoven fabric impregnated or impregnated with the resin is arranged, the bacteria adhered to the medium-performance filter are surely sterilized by iodine having a strong bactericidal action, and kill and remove the bacteria with almost 100% removal efficiency. be able to. This has a remarkable effect that a secondary infection can be reliably prevented in hospitals and the like. Further, by using an iodinated demand-type bactericide resin as the iodinated bactericide resin, bacteria can be killed more efficiently, and leakage of the iodine component can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a structure of an antibacterial filter according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a state in which a filter unit using the antibacterial filter shown in FIG. 1 is arranged on a ventilation path of an air conditioner.

FIG. 3 is an explanatory view showing a state in which a filter unit using the antibacterial filter shown in FIG. 1 is arranged inside a duct.

FIG. 4 is a cross-sectional view illustrating a structure of an antibacterial filter according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a structure of an antibacterial filter according to a third embodiment of the present invention.

FIG. 6 is an explanatory view showing an apparatus used for measuring the sterilization efficiency of an antibacterial filter.

FIG. 7 is an explanatory view showing a configuration of a conventional sterilization filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antibacterial filter 2 Medium-performance filter 3, 4 Iodine-containing filter 5 Frame 6 Adhesive 7 Packing material 8 Filter unit 9 Support rod 11 Room 11a Side part 11b Ceiling part 12 Suction port 13 Outside air duct 14 Pre-filter 15 Cold / hot water coil 16 , 31 fan 17, 21, 32 duct 18 outlet 22 bracket 23 to 26 iodine-containing filter 33 sterilization filter 34 antibacterial filter 35 post-processing filter 36 aerosol supply port 37 upstream measurement port 38 downstream measurement port

Claims (5)

[Claims] 1. An antibacterial filter disposed in a ventilation path of an air conditioner for killing and removing bacteria in the air, wherein a nonwoven fabric impregnated with or impregnated with an iodinated germicide resin is attached to at least one surface of the medium-performance filter. An antibacterial filter characterized by being worn. 2. An antibacterial filter disposed in a ventilation path of an air conditioner for killing and removing bacteria in the air, wherein a nonwoven fabric impregnated with or impregnated with an iodinated germicide resin is attached to at least one surface of the medium-performance filter. An antibacterial filter, wherein a laminated body attached is formed, and the laminated body is bent and arranged in a zigzag cross section. 3. An antibacterial filter arranged in a ventilation path of an air conditioner for killing and removing bacteria in the air, wherein at least one of a front side and a rear side of a medium-performance filter configured to bend in a zigzag cross section. An antibacterial filter comprising a flat nonwoven fabric impregnated or impregnated with an iodinated germicide resin. 4. An antibacterial filter which is disposed in a ventilation path of an air conditioner and kills and removes bacteria in the air, wherein at least one of a front side and a rear side of a medium-performance filter configured to bend in a zigzag cross section. An antibacterial filter comprising a nonwoven fabric having a corrugated cross section impregnated or impregnated with an iodinated germicide resin. 5. The iodinated bactericide resin is obtained by contacting and adsorbing chlorine on a strongly basic anion exchange resin to form chloride and triiodide ions of the strongly basic anion exchange resin provided in the form of chloride. The antibacterial filter according to any one of claims 1 to 4, wherein the antibacterial filter is an iodinated demand-type disinfectant resin produced by replacing the antibacterial filter.