WO2015049891A1 - Method for purifying air in room, and device for use in same - Google Patents

Method for purifying air in room, and device for use in same Download PDF

Info

Publication number
WO2015049891A1
WO2015049891A1 PCT/JP2014/060961 JP2014060961W WO2015049891A1 WO 2015049891 A1 WO2015049891 A1 WO 2015049891A1 JP 2014060961 W JP2014060961 W JP 2014060961W WO 2015049891 A1 WO2015049891 A1 WO 2015049891A1
Authority
WO
WIPO (PCT)
Prior art keywords
aqueous solution
hypochlorous acid
air
solution containing
containing hypochlorous
Prior art date
Application number
PCT/JP2014/060961
Other languages
French (fr)
Japanese (ja)
Inventor
隆平 亀井
Original Assignee
株式会社シリウス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社シリウス filed Critical 株式会社シリウス
Publication of WO2015049891A1 publication Critical patent/WO2015049891A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/117—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering
    • F24F8/125—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering using wet filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/117—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/24—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using sterilising media
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates to a method for purifying indoor air that efficiently removes viruses and bacteria drifting indoors in a short time.
  • the invention also relates to an apparatus for use in the method for cleaning indoor air.
  • An object of the present invention is to provide a method for purifying indoor air that efficiently removes viruses and bacteria drifting indoors in a short time, and a device for use in the method.
  • the present inventor has found that indoor air is an aqueous solution containing hypochlorous acid having a pH of 5 to 7 and having a concentration of hypochlorous acid in the range of 20 ppm to 200 ppm. Return to the indoors again through the impregnated sterilization filter. At this time, the supply amount of the aqueous solution containing hypochlorous acid is in the range of 200 mL / hour to 730 mL / hour at room temperature of 20 ° C. and relative humidity of 30%. As a result, it was found that viruses and bacteria drifting indoors can be efficiently removed in a short time, and the present invention has been completed.
  • the present invention (1) A method of purifying indoor air by passing the taken indoor air through a sterilizing filter impregnated with an aqueous solution containing hypochlorous acid and returning the indoor air again.
  • the aqueous solution containing hypochlorous acid is a solution of pH 5 to pH 7 in which the concentration of hypochlorous acid is in the range of 20 ppm to 200 ppm, and the amount of aqueous solution containing hypochlorous acid supplied to the room is 20 room temperature.
  • the aqueous solution containing hypochlorous acid has a mechanism that flows from an exchangeable cartridge container filled with the aqueous solution into an impregnation tray provided with the sterilization filter.
  • the sterilization filter is composed of a corrugated structure having a large number of communication holes leading from the front to the back, the communication holes having a hole diameter of 4 mm to 7 mm and a hole length of 4.5 cm to 6.5 cm.
  • An apparatus for use in the method according to any one of (1) to (4) An apparatus main body in which an air passage portion formed in the main body communicates with outside air at an air inlet on the side of the main body and an air outlet at the top of the main body, A blower that takes in indoor air from the intake port, sends it to the air passage portion, and discharges it from the blowout port; A sterilization filter that is blown and passes air that is flowed through the air passage portion; An impregnation tray provided so that the sanitizing filter is impregnated with an aqueous solution containing hypochlorous acid in the tray; A replaceable cartridge container filled with an aqueous solution containing hypochlorous acid, and a solution flow path through which the aqueous solution containing hypochlorous acid flows into the impreg
  • a method for purifying indoor air that efficiently removes viruses and bacteria drifting indoors in a short time and an apparatus for use in the method.
  • the aqueous solution containing hypochlorous acid used in the present invention is not produced by electrolysis, but is prepared outside, for example, stored in a replaceable cartridge container or the like. Regardless of the efficiency of degradation, etc., the required amount can be supplied at any time, and since it has been adjusted to a pH advantageous for virucidal activity and sterilization activity, it is always stable. Indoor air can be cleaned. Moreover, since the method of this invention humidifies indoors as a result, it can be used also as a humidification method accompanying the cleaning of indoor air.
  • the apparatus of this invention can employ
  • the method of the present invention has an excellent effect of efficiently removing viruses and bacteria drifting indoors in a short time, and the following three reasons are conceivable. 1) When air passes through a sterilization filter impregnated with an aqueous solution containing hypochlorous acid, the aqueous solution evaporates, and the air containing the vapor of the aqueous solution is returned indoors, and the air is returned to the returned air.
  • the contained hypochlorous acid (chlorine) removes viruses and bacteria floating indoors.
  • FIG. 1 It is a figure explaining the disinfection filter used for the method of the present invention. It is the schematic explaining the apparatus of this invention. It is an external appearance perspective view of 1 aspect of the apparatus of this invention. It is a disassembled perspective view of 1 aspect of the apparatus of this invention. It is a figure which shows the baseplate part of 1 aspect of the apparatus of this invention. Were used in the test is a top view of a 25 m 3 chamber. Were used in the test is a side view of a 25 m 3 chamber. It is a graph which shows the change of the number of floating viruses with elapsed time. It is a graph which shows the change of the floating virus residual rate when the initial value 0 minute is set to 100%.
  • the method of cleaning indoor air of the present invention is to return the taken indoor air to the indoor again through a sterilization filter impregnated with an aqueous solution containing hypochlorous acid
  • the aqueous solution containing hypochlorous acid is a solution of pH 5 to pH 7 in which the concentration of hypochlorous acid is in the range of 20 ppm to 200 ppm, and the amount of aqueous solution containing hypochlorous acid supplied to the room is 20 room temperature. It is characterized by being in the range of 200 mL / hour to 730 mL / hour at a temperature of 30 ° C. and a relative humidity of 30%.
  • Examples of the aqueous solution containing hypochlorous acid used in the present invention include the following aqueous solutions (A) and (B).
  • A An aqueous solution prepared by adding sodium hypochlorite to water and adjusting the pH to 5 to 7 using an acid.
  • B An aqueous solution prepared by adding a tablet composed of carbonate, organic acid and sodium dichloroisocyanurate to water to adjust the pH to 5-7.
  • water to be used tap water, well water, deionized water, distilled water, etc. can be used, but water from which calcium and magnesium have been removed is preferred.
  • the concentration of sodium hypochlorite in the aqueous solution (A) is in the range of 20 to 200 ppm. From the economical aspect, the range of 50 to 100 ppm is preferable.
  • an aqueous solution having a desired sodium hypochlorite concentration (pH 5 to 7) can be prepared in advance, but a high concentration aqueous solution such as 3000 ppm hypochlorous acid can be used. It is also possible to prepare an aqueous solution of sodium concentration (pH 5 to 7) in advance and dilute it with tap water to a desired concentration immediately before use.
  • the carbonate include sodium bicarbonate
  • examples of the organic acid include succinic acid.
  • the carbonate is in the range of 70 to 80% by weight based on the weight of the tablet
  • the organic acid is in the range of 19 to 27% by weight based on the weight of the tablet
  • the sodium dichloroisocyanurate is in the weight of the tablet. Based on 1 to 3% by weight.
  • water to be used tap water, well water, deionized water, distilled water or the like can be used, but water from which calcium or magnesium has been removed is preferable.
  • the concentration of sodium hypochlorite in the aqueous solution (B) is adjusted to be in the range of 20 to 200 ppm.
  • the aqueous solution (B) is prepared by adding the above tablet in water in a separate container and dissolving it in advance to prepare an aqueous solution (pH 5 to 7) having a desired sodium hypochlorite concentration.
  • an aqueous solution having a desired sodium hypochlorite concentration pH 5
  • Thru 7 can also be prepared and used.
  • an aqueous solution of sodium chlorite concentration (pH 5 to 7).
  • 1 L of an aqueous solution of 50 ppm sodium hypochlorite can be obtained with about 8 mg sodium dichloroisocyanurate, for example, from a 2 g tablet comprising 40 mg sodium dichloroisocyanurate, 1500 mg sodium bicarbonate and 460 mg succinic acid.
  • 5 L of 50 ppm sodium hypochlorite aqueous solution can be prepared, and 2.5 L of 100 ppm sodium hypochlorite aqueous solution can be prepared.
  • the sterilization filter used in the present invention will be described with reference to FIG.
  • the sterilization filter for example, as shown in FIG. 1, there is a sterilization filter 3 made of a corrugated structure having a large number of communication holes leading from the front to the back.
  • the sterilization filter 3 is The flat cloth body 12 and the corrugated cloth body 11 are alternately stacked.
  • the diameter of the communication hole of the corrugated structure is preferably 4 mm to 7 mm.
  • the cell size in the corrugated structure is preferably such that the step height b is in the range of 2 to 4 mm, more preferably in the range of 2.5 to 3.5 mm, and the pitch a is in the range of 4 to 7 mm.
  • the flat cloth body 12 is, for example, a nonwoven fabric having a thickness of 0.3 to 0.7 mm, preferably 0.4 to 0.6 mm, preferably made of rayon and PVA (polyvinyl alcohol), Preferably, it is composed of 40 to 60% by weight of rayon and 40 to 60% by weight of PVA, and more preferably of 50% by weight of rayon and 50% by weight of PVA.
  • the wavy cloth body 11 is, for example, a non-woven fabric having a thickness of 0.3 to 0.7 mm, preferably 0.4 to 0.6 mm, and can be made of the same material as the flat cloth body 12. However, it can also be composed of different materials.
  • the corrugated cloth body 11 is made of the same material as the flat cloth body 12, preferably made of rayon and PVA (polyvinyl alcohol), and preferably 40 to 60% by weight of rayon. It is preferably composed of 40 to 60% by mass of PVA, more preferably composed of 50% by mass of rayon and 50% by mass of PVA.
  • the cross-sectional area when air passes through the sterilization filter 3, that is, the area of the front surface of the sterilization filter is not particularly limited, but is, for example, 200 to 300 cm 2 , preferably 240 to 260 cm 2 . be able to.
  • the hole length of the communication hole in the sterilization filter 3, that is, the distance from the front surface to the back surface of the sterilization filter 3, is 4.5 to 6.5 cm, and preferably 5.0 cm to 6.0 cm.
  • the sterilization filter 3 is used in a form sandwiched between the holding body 13 and the other holding body 14.
  • both the holding bodies 13 and 14 are made of a synthetic resin material, and the one holding body 13 is opened on one side for accommodating the sterilization filter 3, and a lattice-shaped window is provided on the other side.
  • the locking portion 15 is formed on one of the side portions, and the engaging groove 16 is formed on the other side portion.
  • the other holding body 14 is also opened on one side to accommodate the sterilizing filter 3, a lattice-like window is formed on the other side, and a locking part 15 is formed on one of the side parts.
  • an engaging groove 16 is formed on the other side portion.
  • the sterilization filter is impregnated with the aqueous solution containing hypochlorous acid, and the indoor air is impregnated with the aqueous solution containing hypochlorous acid. It is returned indoors through the fungus filter.
  • the aqueous solution containing hypochlorous acid is stored, for example, in a replaceable cartridge container, and is supplied from the cartridge container to the impregnation tray through the solution flow path.
  • the sterilization filter is installed in the impregnation tray, so that the bottom surface of the sterilization filter is immersed in an aqueous solution containing hypochlorous acid supplied to the impregnation tray, and the aqueous solution is subjected to capillary action. The entire sterilization filter is sucked up, and as a result, the sterilization filter is impregnated with an aqueous solution containing hypochlorous acid.
  • the indoor air is returned to the indoor through the sterilization filter impregnated with the aqueous solution containing hypochlorous acid, and this is achieved, for example, by blowing indoor air to the sterilization filter with a blower.
  • the blower is a fan motor including a blower fan, and examples of the blower fan include a sirocco fan and a cross flow fan. A fan motor with a sirocco fan is preferred. It is preferable to remove the dust contained in the indoor air through an air purification filter before being sent to the blower.
  • the indoor supply amount of the aqueous solution containing hypochlorous acid is adjusted to a range of 200 mL / hour to 730 mL / hour at a room temperature of 20 ° C.
  • the humidification amount at a room temperature of 20 ° C. and a relative humidity of 30% is in the range of 400 mL / hour to 600 mL / hour.
  • the speed of the air passing through the sterilization filter corresponds to 120 to 180 m / min.
  • the air flow rate is about 3.0 m 3 / min to 4.5 m 3 / min.
  • the thing in which the humidification amount in room temperature 20 degreeC and 30% of relative humidity becomes the range of 450 to 550 mL / hour is also preferable.
  • the speed of the air passing through the sterilization filter corresponds to 135 to 160 m / min.
  • the cross-sectional area of the sterilization filter is 250 cm 2, the flow rate of air to no 3.4 m 3 / min a 4.14m 3 / min extent.
  • the invention also relates to an apparatus for use in the method for cleaning indoor air as described above.
  • the apparatus for purifying indoor air of the present invention has an apparatus main body in which an air passage portion formed in the main body communicates with outside air at the air inlet on the side of the main body and the air outlet at the top of the main body, A blower that takes in indoor air from the intake port, sends it to the air passage portion, and discharges it from the blowout port; A sterilization filter that is blown and passes air that is flowed through the air passage portion; An impregnation tray provided so that the sanitizing filter is impregnated with an aqueous solution containing hypochlorous acid in the tray; A replaceable cartridge container filled with an aqueous solution containing hypochlorous acid, and a solution flow path through which the aqueous solution containing hypochlorous acid flows into the impregnation tray from the cartridge container .
  • the aqueous solution 6 containing hypochlorous acid is stored in the replaceable cartridge container 4, and the aqueous solution 6 containing hypochlorous acid flows out of the cartridge container 4 through the water receiving part 7 and passes through the solution flow path. And flows into the impregnation tray 5. Since the sterilization filter 3 is installed in the impregnation tray, the bottom surface of the sterilization filter 3 is immersed in an aqueous solution containing hypochlorous acid supplied to the impregnation tray 5 and the aqueous solution is removed by capillary action. As a result, the sterilizing filter 3 is impregnated with the aqueous solution 6 containing hypochlorous acid.
  • indoor air enters the apparatus through an air inlet on the side of the apparatus main body and is supplied to the blower fan 2 coupled to the rotation shaft of the fan motor 1.
  • the air supplied to the blower fan 2 is accelerated, blown downward from the blower port 10, and blown to the sterilization filter 3 impregnated with the aqueous solution 6 containing hypochlorous acid.
  • the blown air passes through the sterilization filter 3, passes through an air passage formed inside the back plate 8, and is discharged indoors from the air outlet 9.
  • the air passage portion is in the form of an air inlet on the side of the apparatus main body ⁇ the air blowing fan 2 ⁇ the air blowing port 10 ⁇ the sterilizing filter 3 ⁇ the air passage formed inside the back plate 8 ⁇ the air outlet 9.
  • the apparatus of the present invention has a front panel 17 on the front surface and a top plate 20, an operation unit 21, a handle 19, and an air outlet 9 on the upper surface.
  • the air outlet 9 is closed when not in use, and is used by opening the louver during operation.
  • An air inlet 18 is provided on one side of the apparatus main body, and an air purification filter is present inside the air inlet 18.
  • the apparatus of the present invention has a replaceable cartridge container 4 and a cartridge container lid plate 23 on the back surface, and a peripheral side plate 22 on the side surface opposite to the side surface having the air inlet 18.
  • FIG. 4 shows an external appearance when one embodiment of the apparatus of the present invention is disassembled.
  • the apparatus of the present invention can be easily disassembled into a part 25 of the apparatus main part 24, the bottom plate part 26, the replaceable cartridge container 4, the sterilization filter 3 integrated with the holding bodies 13 and 14, and the back plate 8.
  • an impregnation tray 5 for supplying an aqueous solution containing hypochlorous acid is formed on the bottom plate portion 26, and the sterilization filter 3 integrated with the holding bodies 13 and 14 in the impregnation tray 5.
  • the bottom plate portion 26 is formed with a solution flow passage 27 for supplying the water receiving portion 7 and an aqueous solution containing hypochlorous acid to the impregnation tray 5.
  • Example 1 Evaluation of suppression performance of airborne viruses (25 m 3 space) 1) Purpose The extent to which airborne viruses are suppressed by a space cleaning system containing hypochlorous acid water as humidified water conforms to the Japan Electrical Manufacturers' Association “Evaluation test method for air purifier removal of airborne viruses”. Evaluation was performed using a 25 m 3 test chamber corresponding to a space of 6 tatami mats. 2) Testing Organization Kitasato Environmental Science Center 3) Implementation Period July 17, 2013-July 23, 2013 4) Test Product ("Space Clean System”) Device used: device shown in FIGS. 3 to 5 Bacteria-removing filter: a flat non-woven fabric having a thickness of 0.5 mm composed of 50 mass% rayon and 50 mass% PVA, and the same material.
  • Aqueous solution containing hypochlorous acid Prepare an aqueous solution of about 3000 ppm of sodium hypochlorite, adjusted to pH 5 to 7, and dilute it with tap water just before use. It was used as an aqueous solution (pH 5 to 7) having a concentration of sodium chlorate of about 60 ppm.
  • Operating conditions Used at operating conditions (medium operating mode) in which the humidification amount at a room temperature of 20 ° C. and a relative humidity of 30% was 500 mL / hour. (The speed of air passing through the sterilization filter (wind speed) corresponds to 150 m / min, and the flow rate of air corresponds to 3.77 m 3 / min.)
  • Test microorganism Virus Escherichia coli phage MS2 NBRC 102619 (E. coli phage)
  • Host fungus Escherichia coli NBRC 106373 (E. coli) 6) Reagents and equipment / equipment a.
  • test article (“space cleaning system”) was placed in a 25 m 3 test chamber, and a test virus solution was sprayed and suspended in the chamber. After collecting the first (0 minutes) airborne virus with an impinger, the test product was started. Thereafter, airborne viruses in the chamber were collected over time, and the number of airborne viruses was measured. As a control, the number of spontaneously decaying viruses was measured. Details are shown below.
  • FIGS. A test article, a stirring fan, a laser particle counter, and a temperature / humidity meter were installed in a 25 m 3 test chamber.
  • a virus solution spray port and a floating virus collection port were provided on one side of the chamber, and a virus solution spray device and a floating virus collection device were connected to each.
  • a glass nebulizer containing virus solution was used as a virus solution spraying device.
  • a glass midget impinger containing a collection solution was used as a floating virus collection device.
  • test virus solution of about 10 11 PFU / mL. This was diluted 100 times with sterilized ion-exchanged water and used for the test.
  • Spraying of virus solution Compressed air was sent from a compressor to a glass nebulizer containing virus solution, and the virus solution was sprayed into the chamber at about 0.2 mL for 10 minutes to float. The discharge air pressure from the compressor was 1.5 kgf / cm 2 and the discharge air amount was 7.25 L / min. d.
  • the number of viruses in the sprayed test virus solution was 4.6 ⁇ 10 9 PFU / mL.
  • the effective chlorine concentration of pre-purified water used as humidified water was 60 mg / L (pH: 5) at the start of the test, 53 mg / L in the cartridge container at the end of the test, and 32 mg / L in the impregnation tray.
  • the humidification amount was 250 mL in 40 minutes.
  • Table 1 shows the number of suspended viruses for each elapsed time
  • FIG. 8 is a graph showing the change in the number of suspended viruses at that time. The slope of the approximate expression for the number of floating viruses shown in FIG.
  • logarithm of the number of floating viruses that change per minute was ⁇ 0.00661 for the control and ⁇ 0.20000 for the test product. . Therefore, log reduction of the number of floating viruses from early control at 10 minutes 0.07Log 10, specimen is 2.00Log 10, subject 20 minutes 0.13Log 10, the test article 4.00Log 10 Met. Comparing the logarithmic reduction in the number of viruses (decrease rate * ) relative to the control, it was 1.93 log 10 (98.8%) in 10 minutes and 3.87 log 10 (99.98%) in 20 minutes depending on the test article. Diminished. The time required for the logarithmic decrease value to reach 2.0 log 10 (99%) or more was 11 minutes.
  • FIG. 9 shows the change in the residual rate of airborne virus at that time.
  • FIG. 10 shows a graph showing changes in the chamber temperature and humidity during the test
  • FIG. 13 shows a graph showing changes in the chamber temperature and humidity during the test of the test product.

Abstract

[Problem] To provide a method for purifying air in a room, and to provide a device for use in the method. [Solution] A method for purifying air in a room by passing incorporated air from the room through a sterilization filter impregnated with an aqueous solution including hypochlorous acid and returning the air to the room, the aqueous solution including hypochlorous acid being a liquid having a pH of 5 to 7 in which the concentration of hypochlorous acid is in the range of 20 ppm to 200 ppm, and the rate of supply of the aqueous solution including hypochlorous acid into the room being in the range of 200 mL/hour to 730 mL/hour at a room temperature of 20°C and relative humidity of 30%.

Description

屋内の空気を清浄化する方法及びそれに使用するための装置Method for purifying indoor air and apparatus for use therein
　本発明は、屋内に漂うウィルスや細菌を短時間で効率よく除去する屋内の空気を清浄化する方法に関するものである。また、本発明は、前記屋内の空気を清浄化する方法に使用するための装置にも関する。 The present invention relates to a method for purifying indoor air that efficiently removes viruses and bacteria drifting indoors in a short time. The invention also relates to an apparatus for use in the method for cleaning indoor air.
　屋内の空中に浮遊するウィルスや細菌等を除去することは、重要な公衆衛生上の問題となっている。これに対応して、水道水を電気分解して次亜塩素酸を含む電解水を生成させ、この電解水を用いて空気中に浮遊するウィルス等の除去を図った除菌装置が幾つか提案されている（例えば、特許文献１ないし３参照）。
　しかし、これらの装置は、必ずしも屋内に漂うウィルスや細菌を短時間で効率よく除去できるといえるものではなかった。 Removing viruses, bacteria, etc. floating in the air indoors is an important public health problem. Correspondingly, several sterilization devices that electrolyze tap water to produce electrolyzed water containing hypochlorous acid and remove viruses floating in the air using this electrolyzed water are proposed. (For example, see Patent Documents 1 to 3).
However, these devices cannot always be said to be able to efficiently remove viruses and bacteria drifting indoors in a short time.
特開２００２－１８１３５８号公報JP 2002-181358 A 特開２００７－２４４５２９号公報JP 2007-244529 A 特開２００８－０４５８５６号公報JP 2008-045856 A
　本発明は、屋内に漂うウィルスや細菌を短時間で効率よく除去する屋内の空気を清浄化する方法及びこれに使用するための装置の提供を課題とする。 An object of the present invention is to provide a method for purifying indoor air that efficiently removes viruses and bacteria drifting indoors in a short time, and a device for use in the method.
　本発明者は、上記課題を解決するために鋭意検討を行った結果、屋内の空気を、次亜塩素酸の濃度が２０ｐｐｍ乃至２００ｐｐｍの範囲にあるｐＨ５乃至ｐＨ７の次亜塩素酸を含む水溶液を含浸した除菌フィルタに通して再び屋内に戻し、その際、次亜塩素酸を含む水溶液の屋内への供給量を、室温２０℃及び相対湿度３０％において、２００ｍＬ／時間乃至７３０ｍＬ／時間の範囲とすると、屋内に漂うウィルスや細菌が短時間で効率よく除去できることを見出し、本発明を完成させた。 As a result of intensive studies to solve the above problems, the present inventor has found that indoor air is an aqueous solution containing hypochlorous acid having a pH of 5 to 7 and having a concentration of hypochlorous acid in the range of 20 ppm to 200 ppm. Return to the indoors again through the impregnated sterilization filter. At this time, the supply amount of the aqueous solution containing hypochlorous acid is in the range of 200 mL / hour to 730 mL / hour at room temperature of 20 ° C. and relative humidity of 30%. As a result, it was found that viruses and bacteria drifting indoors can be efficiently removed in a short time, and the present invention has been completed.
　即ち、本発明は、
（１）取り入れられた屋内の空気を、次亜塩素酸を含む水溶液を含浸した除菌フィルタに通して再び屋内に戻すことにより、屋内の空気を清浄化する方法であって、
　前記次亜塩素酸を含む水溶液は、次亜塩素酸の濃度が２０ｐｐｍ乃至２００ｐｐｍの範囲にあるｐＨ５乃至ｐＨ７の液であり、そして
　次亜塩素酸を含む水溶液の屋内への供給量は、室温２０℃及び相対湿度３０％において、２００ｍＬ／時間乃至７３０ｍＬ／時間の範囲にある、方法、
（２）前記次亜塩素酸を含む水溶液は、該水溶液が充填される交換可能なカートリッジ容器より、前記除菌フィルタが備えられた含浸トレイ内に流入される機構となっている、前記（１）記載の方法、
（３）前記除菌フィルタは、正面から背面に通じる多数の連通孔を有するコルゲート構造体からなり、該連通孔は、４ｍｍ乃至７ｍｍの孔径及び４．５ｃｍ乃至６．５ｃｍの孔長を有する、前記（１）又は前記（２）記載の方法、
（４）前記コルゲート構造体は、４０乃至６０質量％のレーヨンと６０乃至４０質量％のＰＶＡとからなる不織布より作られている、前記（３）記載の方法、
（５）前記（１）乃至前記（４）のうちいずれか一つに記載の方法に使用するための装置であって、
　本体内に形成された空気通路部が、本体側方の吸気口と本体上部の吹出口とにおいて外気と連通する装置本体と、
　屋内の空気を前記吸気口より取り入れ、前記空気通路部に流送し、そして前記吹出口より放出する送風機と、
　前記空気通路部内を流送される空気が吹き当てられそして通過する除菌フィルタと、
　該除菌フィルタがトレイ内において、次亜塩素酸を含む水溶液が含浸されるように備えられた含浸トレイと、
　次亜塩素酸を含む水溶液が充填された交換可能なカートリッジ容器と、そして
　次亜塩素酸を含む水溶液が該カートリッジ容器より前記含浸トレイに流入する溶液流路とを備えてなる、
屋内の空気を清浄化する装置、
に関するものである。 That is, the present invention
(1) A method of purifying indoor air by passing the taken indoor air through a sterilizing filter impregnated with an aqueous solution containing hypochlorous acid and returning the indoor air again.
The aqueous solution containing hypochlorous acid is a solution of pH 5 to pH 7 in which the concentration of hypochlorous acid is in the range of 20 ppm to 200 ppm, and the amount of aqueous solution containing hypochlorous acid supplied to the room is 20 room temperature. A method in the range of 200 mL / hr to 730 mL / hr at 0 C and 30% relative humidity,
(2) The aqueous solution containing hypochlorous acid has a mechanism that flows from an exchangeable cartridge container filled with the aqueous solution into an impregnation tray provided with the sterilization filter. ) Described method,
(3) The sterilization filter is composed of a corrugated structure having a large number of communication holes leading from the front to the back, the communication holes having a hole diameter of 4 mm to 7 mm and a hole length of 4.5 cm to 6.5 cm. The method according to (1) or (2),
(4) The method according to (3), wherein the corrugated structure is made of a nonwoven fabric composed of 40 to 60% by mass of rayon and 60 to 40% by mass of PVA.
(5) An apparatus for use in the method according to any one of (1) to (4),
An apparatus main body in which an air passage portion formed in the main body communicates with outside air at an air inlet on the side of the main body and an air outlet at the top of the main body,
A blower that takes in indoor air from the intake port, sends it to the air passage portion, and discharges it from the blowout port;
A sterilization filter that is blown and passes air that is flowed through the air passage portion;
An impregnation tray provided so that the sanitizing filter is impregnated with an aqueous solution containing hypochlorous acid in the tray;
A replaceable cartridge container filled with an aqueous solution containing hypochlorous acid, and a solution flow path through which the aqueous solution containing hypochlorous acid flows into the impregnation tray from the cartridge container;
Equipment to clean indoor air,
It is about.
　本発明により、屋内に漂うウィルスや細菌を短時間で効率よく除去する屋内の空気を清浄化する方法及びこれに使用するための装置が提供される。
　本発明で使用する次亜塩素酸を含む水溶液は、電気分解で生成させるものでなく、外部で調製されたものを、例えば、交換可能なカートリッジ容器等に貯めて使用するものであるため、電気分解の効率等に左右されることなく、必要な量をいつでも供給することが可能であり、また、殺ウィルス活性や除菌活性に有利なｐＨに調整されたものであるため、常時安定して屋内の空気を清浄化することができる。
　また、本発明の方法は、結果として屋内を加湿するものであるため、屋内の空気の清浄化を伴う加湿方法としても使用することができる。
　また、本発明の装置は、実質的に加湿器と同じ簡易な構造の装置を採用することができるため、経済性の点で有利である。
　本発明の方法は、屋内に漂うウィルスや細菌を短時間で効率よく除去するという優れた効果を奏するものであるが、その理由については、以下の３つの理由が考えられる。
１）次亜塩素酸を含む水溶液を含浸した除菌フィルタを空気が通過する際に、該水溶液が蒸発し、該水溶液の蒸気を含む空気が屋内に戻されて、該戻された空気中に含まれる次亜塩素酸（塩素）が、屋内に漂うウィルスや細菌を除去する。
２）次亜塩素酸を含む水溶液を含浸した除菌フィルタの周囲には、該水溶液が蒸発した蒸気が存在するため、屋内の空気は、除菌フィルタを通過する際、前記蒸気と接触し、これにより、除菌フィルタを通過する空気中のウィルスや細菌が除去され、該ウィルスや細菌が除去された空気が屋内に戻され、これを繰り返すことにより、屋内に漂うウィルスや細菌が除去される。
３）除菌フィルタを空気が通過する際、該空気は除菌フィルタに含浸された次亜塩素酸と接触し、これにより、除菌フィルタを通過する空気中のウィルスや細菌が除去され、該ウィルスや細菌が除去された空気が屋内に戻され、これを繰り返すことにより、屋内に漂うウィルスや細菌が除去される。
　本発明の方法の優れた効果が上記の何れの理由により奏させるものであるかは必ずしも明確ではないが、実施例で示される２５ｍ3チャンバー内の塩素濃度が非常に低い濃度に保たれていたことから、３）である可能性が高いものと考えられる。 INDUSTRIAL APPLICABILITY According to the present invention, there is provided a method for purifying indoor air that efficiently removes viruses and bacteria drifting indoors in a short time and an apparatus for use in the method.
The aqueous solution containing hypochlorous acid used in the present invention is not produced by electrolysis, but is prepared outside, for example, stored in a replaceable cartridge container or the like. Regardless of the efficiency of degradation, etc., the required amount can be supplied at any time, and since it has been adjusted to a pH advantageous for virucidal activity and sterilization activity, it is always stable. Indoor air can be cleaned.
Moreover, since the method of this invention humidifies indoors as a result, it can be used also as a humidification method accompanying the cleaning of indoor air.
Moreover, since the apparatus of this invention can employ | adopt the apparatus of the simple structure substantially the same as a humidifier, it is advantageous at the point of economical efficiency.
The method of the present invention has an excellent effect of efficiently removing viruses and bacteria drifting indoors in a short time, and the following three reasons are conceivable.
1) When air passes through a sterilization filter impregnated with an aqueous solution containing hypochlorous acid, the aqueous solution evaporates, and the air containing the vapor of the aqueous solution is returned indoors, and the air is returned to the returned air. The contained hypochlorous acid (chlorine) removes viruses and bacteria floating indoors.
2) Since the vapor | steam which this aqueous solution evaporated exists in the circumference | surroundings of the sterilization filter impregnated with the aqueous solution containing hypochlorous acid, indoor air contacts the said vapor | steam when passing a sterilization filter, As a result, viruses and bacteria in the air passing through the sterilization filter are removed, and the air from which the viruses and bacteria have been removed is returned to the indoors. By repeating this, viruses and bacteria drifting indoors are removed. .
3) When air passes through the sterilization filter, the air comes into contact with hypochlorous acid impregnated in the sterilization filter, thereby removing viruses and bacteria in the air passing through the sterilization filter. The air from which viruses and bacteria have been removed is returned indoors, and the virus and bacteria drifting indoors are removed by repeating this process.
Although it is not necessarily clear which of the above reasons the excellent effect of the method of the present invention is exhibited, the chlorine concentration in the 25 m 3 chamber shown in the examples was kept at a very low concentration. Therefore, the possibility of 3) is considered high.
本発明の方法に用いる除菌フィルタを説明する図である。It is a figure explaining the disinfection filter used for the method of the present invention. 本発明の装置を説明する概略図である。It is the schematic explaining the apparatus of this invention. 本発明の装置の１態様の外観斜視図である。It is an external appearance perspective view of 1 aspect of the apparatus of this invention. 本発明の装置の１態様の分解斜視図である。It is a disassembled perspective view of 1 aspect of the apparatus of this invention. 本発明の装置の１態様の底板部を示す図である。It is a figure which shows the baseplate part of 1 aspect of the apparatus of this invention. 試験に使用した、２５ｍ3チャンバーの上面図である。Were used in the test is a top view of a 25 m 3 chamber. 試験に使用した、２５ｍ3チャンバーの側面図である。Were used in the test is a side view of a 25 m 3 chamber. 経過時間に伴う浮遊ウィルス数の変化を示すグラフである。It is a graph which shows the change of the number of floating viruses with elapsed time. 初期値０分を１００％とした時の浮遊ウィルス残存率の変化を示すグラフである。It is a graph which shows the change of the floating virus residual rate when the initial value 0 minute is set to 100%. 対照の試験時におけるチャンバー内の浮遊粒子数の変化を示すグラフである。It is a graph which shows the change of the number of suspended particles in a chamber at the time of a control test. 試験品の試験時におけるチャンバー内の浮遊粒子数の変化を示すグラフである。It is a graph which shows the change of the number of floating particles in a chamber at the time of the test of a test article. 対照の試験時におけるチャンバー内温湿度の変化を示すグラフである。It is a graph which shows the change of the temperature / humidity in a chamber at the time of a control test. 試験品の試験時におけるチャンバー内温湿度の変化を示すグラフである。It is a graph which shows the change of the temperature-humidity in a chamber at the time of the test of a test article.
　更に詳細に本発明を説明する。
　本発明の屋内の空気を清浄化する方法は、取り入れられた屋内の空気を、次亜塩素酸を含む水溶液を含浸した除菌フィルタに通して再び屋内に戻すものであって、
　前記次亜塩素酸を含む水溶液は、次亜塩素酸の濃度が２０ｐｐｍ乃至２００ｐｐｍの範囲にあるｐＨ５乃至ｐＨ７の液であり、そして
　次亜塩素酸を含む水溶液の屋内への供給量は、室温２０℃及び相対湿度３０％において、２００ｍＬ／時間乃至７３０ｍＬ／時間の範囲にあることを特徴とする。 The present invention will be described in more detail.
The method of cleaning indoor air of the present invention is to return the taken indoor air to the indoor again through a sterilization filter impregnated with an aqueous solution containing hypochlorous acid,
The aqueous solution containing hypochlorous acid is a solution of pH 5 to pH 7 in which the concentration of hypochlorous acid is in the range of 20 ppm to 200 ppm, and the amount of aqueous solution containing hypochlorous acid supplied to the room is 20 room temperature. It is characterized by being in the range of 200 mL / hour to 730 mL / hour at a temperature of 30 ° C. and a relative humidity of 30%.
　本発明に使用する次亜塩素酸を含む水溶液としては、例えば、以下の（Ａ）及び（Ｂ）の水溶液が挙げられる。
（Ａ）水に次亜塩素酸ナトリウムを加え、酸を用いてｐＨを５ないし７に調節した水溶液。
（Ｂ）炭酸塩、有機酸及びジクロロイソシアヌル酸ナトリウムからなる錠剤を水に加えてｐＨを５ないし７に調節した水溶液。
　以下、（Ａ）及び（Ｂ）の水溶液について説明する。
（Ａ）の水溶液について
　使用する水としては、水道水、井戸水、脱イオン水、蒸留水等を用いることができるが、カルシウムやマグネシウムが除去された水が好ましい。
　使用する酸としては、例えば、塩酸、酢酸等が挙げられる。
　（Ａ）の水溶液における次亜塩素酸ナトリウムの濃度は、２０ないし２００ｐｐｍの範囲とする。経済性の面からは、５０ないし１００ｐｐｍの範囲が好ましい。
　（Ａ）の水溶液は、予め、所望の次亜塩素酸ナトリウムの濃度の水溶液（ｐＨを５ないし７）を調製して用いることもできるが、濃度の高い水溶液、例えば、３０００ｐｐｍの次亜塩素酸ナトリウムの濃度の水溶液（ｐＨを５ないし７）を事前に用意しておき、使用直前にこれを所望の濃度に水道水で希釈して使用することもできる。
（Ｂ）の水溶液について
　炭酸塩としては、炭酸水素ナトリウムが挙げられ、有機酸としては、コハク酸が挙げられる。
　炭酸塩は、錠剤の質量に基づいて７０ないし８０質量％の範囲であり、有機酸は、錠剤の質量に基づいて１９ないし２７質量％の範囲であり、ジクロロイソシアヌル酸ナトリウムは、錠剤の質量に基づいて１ないし３質量％の範囲である。
　使用する水としては、水道水、井戸水、脱イオン水、蒸留水等を用いることができるが、カルシウムやマグネシウムが除去された水が好ましい。
　（Ｂ）の水溶液における次亜塩素酸ナトリウムの濃度は、２０ないし２００ｐｐｍの範囲となるように調節する。経済性の面からは、５０ないし１００ｐｐｍの範囲に調節するのが好ましい。
　（Ｂ）の水溶液は、予め、別個の容器内の水に上記の錠剤を投入して溶解し、所望の次亜塩素酸ナトリウムの濃度の水溶液（ｐＨを５ないし７）を調製し、該水溶液をカートリッジ容器内に供給して用いることもできるが、運転直前に上記の錠剤をカートリッジ容器内に溜めた水に投入して溶解し、所望の次亜塩素酸ナトリウムの濃度の水溶液（ｐＨを５ないし７）を調製して用いることもできる。
　次亜塩素酸ナトリウムの分解、揮散等による減少を最小限に抑えることが可能であるという点において、運転直前に上記の錠剤をカートリッジ容器内に溜めた水に投入して溶解し、所望の次亜塩素酸ナトリウムの濃度の水溶液（ｐＨを５ないし７）を調製して用いるのが好ましい。
　ここで、ｐＨを６．５ないし７．０に調整しておくのがより好ましい。
　尚、約８ｍｇのジクロロイソシアヌル酸ナトリウムで、５０ｐｐｍの次亜塩素酸ナトリウムの水溶液を１Ｌ得ることができるため、例えば、ジクロロイソシアヌル酸ナトリウム４０ｍｇ、炭酸水素ナトリウム１５００ｍｇ及びコハク酸４６０ｍｇからなる２ｇの錠剤から、５０ｐｐｍの次亜塩素酸ナトリウムの水溶液を５Ｌ調製でき、また、１００ｐｐｍの次亜塩素酸ナトリウムの水溶液を２．５Ｌ調製できる。 Examples of the aqueous solution containing hypochlorous acid used in the present invention include the following aqueous solutions (A) and (B).
(A) An aqueous solution prepared by adding sodium hypochlorite to water and adjusting the pH to 5 to 7 using an acid.
(B) An aqueous solution prepared by adding a tablet composed of carbonate, organic acid and sodium dichloroisocyanurate to water to adjust the pH to 5-7.
Hereinafter, the aqueous solutions (A) and (B) will be described.
About the aqueous solution of (A) As water to be used, tap water, well water, deionized water, distilled water, etc. can be used, but water from which calcium and magnesium have been removed is preferred.
Examples of the acid used include hydrochloric acid and acetic acid.
The concentration of sodium hypochlorite in the aqueous solution (A) is in the range of 20 to 200 ppm. From the economical aspect, the range of 50 to 100 ppm is preferable.
As the aqueous solution (A), an aqueous solution having a desired sodium hypochlorite concentration (pH 5 to 7) can be prepared in advance, but a high concentration aqueous solution such as 3000 ppm hypochlorous acid can be used. It is also possible to prepare an aqueous solution of sodium concentration (pH 5 to 7) in advance and dilute it with tap water to a desired concentration immediately before use.
(B) Aqueous Solution Examples of the carbonate include sodium bicarbonate, and examples of the organic acid include succinic acid.
The carbonate is in the range of 70 to 80% by weight based on the weight of the tablet, the organic acid is in the range of 19 to 27% by weight based on the weight of the tablet, and the sodium dichloroisocyanurate is in the weight of the tablet. Based on 1 to 3% by weight.
As water to be used, tap water, well water, deionized water, distilled water or the like can be used, but water from which calcium or magnesium has been removed is preferable.
The concentration of sodium hypochlorite in the aqueous solution (B) is adjusted to be in the range of 20 to 200 ppm. From the economical aspect, it is preferable to adjust to the range of 50 to 100 ppm.
The aqueous solution (B) is prepared by adding the above tablet in water in a separate container and dissolving it in advance to prepare an aqueous solution (pH 5 to 7) having a desired sodium hypochlorite concentration. However, immediately before the operation, the above tablets are dissolved in water stored in the cartridge container and dissolved, and an aqueous solution having a desired sodium hypochlorite concentration (pH 5). Thru 7) can also be prepared and used.
In view of the fact that it is possible to minimize the reduction due to decomposition, volatilization, etc. of sodium hypochlorite, the above tablets are dissolved in the water stored in the cartridge container immediately before the operation, and the desired next It is preferable to prepare and use an aqueous solution of sodium chlorite concentration (pH 5 to 7).
Here, it is more preferable to adjust the pH to 6.5 to 7.0.
Since 1 L of an aqueous solution of 50 ppm sodium hypochlorite can be obtained with about 8 mg sodium dichloroisocyanurate, for example, from a 2 g tablet comprising 40 mg sodium dichloroisocyanurate, 1500 mg sodium bicarbonate and 460 mg succinic acid. 5 L of 50 ppm sodium hypochlorite aqueous solution can be prepared, and 2.5 L of 100 ppm sodium hypochlorite aqueous solution can be prepared.
　本発明に使用される除菌フィルタを、図１を用いて説明する。
　除菌フィルタとしては、例えば、図１で示されるような、正面から背面に通じる多数の連通孔を有するコルゲート構造体からなる除菌フィルタ３が挙げられるが、この場合、除菌フィルタ３は、平板状の布体１２と波状の布体１１とを交互に積層した構造となる。
　コルゲート構造体の連通孔の孔径は、４ｍｍ乃至７ｍｍとするのが好ましい。
　コルゲート構造体におけるセルサイズは、段高ｂが、２ないし４ｍｍの範囲であるのが好ましく、２．５ないし３．５ｍｍの範囲であるのがより好ましく、ピッチａが、４ないし７ｍｍの範囲であるのが好ましく、５．５ないし６．５ｍｍの範囲であるのがより好ましい。
　平板状の布体１２は、例えば、厚さ０．３ないし０．７ｍｍ、好ましくは、０．４ないし０．６ｍｍの不織布であり、好ましくは、レーヨンとＰＶＡ（ポリビニルアルコール）とで作製され、好ましくは、４０ないし６０質量％のレーヨンと４０ないし６０質量％のＰＶＡとから構成されるのが好ましく、また、５０質量％のレーヨンと５０質量％のＰＶＡとから構成されるのがより好ましい。
　波状の布体１１は、例えば、厚さ０．３ないし０．７ｍｍ、好ましくは、０．４ないし０．６ｍｍの不織布であり、平板状の布体１２と同一の材質で構成することができるが、異なる材質で構成することもできる。
　好ましくは、波状の布体１１は、平板状の布体１２と同一の材質で構成され、好ましくは、レーヨンとＰＶＡ（ポリビニルアルコール）とで作製され、好ましくは、４０ないし６０質量％のレーヨンと４０ないし６０質量％のＰＶＡとから構成されるのが好ましく、また、５０質量％のレーヨンと５０質量％のＰＶＡとから構成されるのがより好ましい。
　除菌フィルタ３を空気が通過する際の断面積、即ち、除菌フィルタの正面の面積は、特に限定されるものではないが、例えば、２００ないし３００ｃｍ2、好ましくは、２４０ないし２６０ｃｍ2とすることができる。
　除菌フィルタ３における連通孔の孔長、即ち、除菌フィルタ３の正面から背面までの距離は４．５ないし６．５ｃｍであり、好ましくは、５．０ｃｍないし６．０ｃｍである。 The sterilization filter used in the present invention will be described with reference to FIG.
As the sterilization filter, for example, as shown in FIG. 1, there is a sterilization filter 3 made of a corrugated structure having a large number of communication holes leading from the front to the back. In this case, the sterilization filter 3 is The flat cloth body 12 and the corrugated cloth body 11 are alternately stacked.
The diameter of the communication hole of the corrugated structure is preferably 4 mm to 7 mm.
The cell size in the corrugated structure is preferably such that the step height b is in the range of 2 to 4 mm, more preferably in the range of 2.5 to 3.5 mm, and the pitch a is in the range of 4 to 7 mm. It is preferred that it is in the range of 5.5 to 6.5 mm.
The flat cloth body 12 is, for example, a nonwoven fabric having a thickness of 0.3 to 0.7 mm, preferably 0.4 to 0.6 mm, preferably made of rayon and PVA (polyvinyl alcohol), Preferably, it is composed of 40 to 60% by weight of rayon and 40 to 60% by weight of PVA, and more preferably of 50% by weight of rayon and 50% by weight of PVA.
The wavy cloth body 11 is, for example, a non-woven fabric having a thickness of 0.3 to 0.7 mm, preferably 0.4 to 0.6 mm, and can be made of the same material as the flat cloth body 12. However, it can also be composed of different materials.
Preferably, the corrugated cloth body 11 is made of the same material as the flat cloth body 12, preferably made of rayon and PVA (polyvinyl alcohol), and preferably 40 to 60% by weight of rayon. It is preferably composed of 40 to 60% by mass of PVA, more preferably composed of 50% by mass of rayon and 50% by mass of PVA.
The cross-sectional area when air passes through the sterilization filter 3, that is, the area of the front surface of the sterilization filter is not particularly limited, but is, for example, 200 to 300 cm 2 , preferably 240 to 260 cm 2 . be able to.
The hole length of the communication hole in the sterilization filter 3, that is, the distance from the front surface to the back surface of the sterilization filter 3, is 4.5 to 6.5 cm, and preferably 5.0 cm to 6.0 cm.
　除菌フィルタ３は、保持体１３と他方の保持体１４とで挟まれた形態で用いられる。
　ここで、前記両保持体１３、１４は、ともに合成樹脂材料で作製され、前記一方の保持体１３は一側は除菌フィルタ３を収納するために開口され、他側は格子状の窓が形成されており、側部の一方には係止部１５が形成されて、もう一方の側部には係合溝１６が形成されている。また、前記他方の保持体１４も同じく一側は除菌フィルタ３を収納するために開口され、他側は格子状の窓が形成されており、側部の一方には係止部１５が形成されて、もう一方の側部には係合溝１６が形成されている。 The sterilization filter 3 is used in a form sandwiched between the holding body 13 and the other holding body 14.
Here, both the holding bodies 13 and 14 are made of a synthetic resin material, and the one holding body 13 is opened on one side for accommodating the sterilization filter 3, and a lattice-shaped window is provided on the other side. The locking portion 15 is formed on one of the side portions, and the engaging groove 16 is formed on the other side portion. Further, the other holding body 14 is also opened on one side to accommodate the sterilizing filter 3, a lattice-like window is formed on the other side, and a locking part 15 is formed on one of the side parts. Thus, an engaging groove 16 is formed on the other side portion.
　本発明の屋内の空気を清浄化する方法において、前記除菌フィルタは、前記次亜塩素酸を含む水溶液を含浸し、そして、屋内の空気は、該次亜塩素酸を含む水溶液を含浸した除菌フィルタを通って屋内に戻される。
　次亜塩素酸を含む水溶液は、例えば、交換可能なカートリッジ容器に蓄えられ、該カートリッジ容器から溶液流路を通って含浸トレイに供給される。ここで、除菌フィルタは、含浸トレイの中に設置されており、そのため、除菌フィルタの底面は含浸トレイに供給された次亜塩素酸を含む水溶液に浸り、そして、該水溶液は毛細管現象により除菌フィルタ全体に吸い上げられ、結果として、除菌フィルタは、次亜塩素酸を含む水溶液を含浸することとなる。 In the method for cleaning indoor air according to the present invention, the sterilization filter is impregnated with the aqueous solution containing hypochlorous acid, and the indoor air is impregnated with the aqueous solution containing hypochlorous acid. It is returned indoors through the fungus filter.
The aqueous solution containing hypochlorous acid is stored, for example, in a replaceable cartridge container, and is supplied from the cartridge container to the impregnation tray through the solution flow path. Here, the sterilization filter is installed in the impregnation tray, so that the bottom surface of the sterilization filter is immersed in an aqueous solution containing hypochlorous acid supplied to the impregnation tray, and the aqueous solution is subjected to capillary action. The entire sterilization filter is sucked up, and as a result, the sterilization filter is impregnated with an aqueous solution containing hypochlorous acid.
　屋内の空気は、前記次亜塩素酸を含む水溶液を含浸した除菌フィルタを通って屋内に戻されるが、これは、例えば、屋内の空気を送風機により除菌フィルタに送風することにより達成される。
　送風機は、送風ファンを備えたファンモーターであり、送風ファンとしては、シロッコファン、クロスフローファン等が挙げられる。シロッコファンを備えたファンモーターが好ましい。
　屋内の空気は、送風機に送られる前に、空気浄化フィルターを通して、空気中に含まれる埃等を除いておくのが好ましい。
　本発明において、次亜塩素酸を含む水溶液の屋内への供給量は、室温２０℃及び相対湿度３０％において、２００ｍＬ／時間乃至７３０ｍＬ／時間の範囲に調整される。
　より好ましい、室温２０℃及び相対湿度３０％における加湿量は、４００ｍＬ／時間乃至６００ｍＬ／時間の範囲である。
　上記の際の、除菌フィルタを通過する空気の速度（風速）は、１２０ないし１８０ｍ／分に相当する。
　この場合、例えば、除菌フィルタの断面積が２５０ｃｍ2である場合、空気の流速は、３．０ｍ3／分ないし４．５ｍ3／分程度となる。
　また、室温２０℃及び相対湿度３０％における加湿量が、４５０ないし５５０ｍＬ／時間の範囲となるものも好ましい。
　上記の際の、除菌フィルタを通過する空気の速度（風速）は、１３５ないし１６０ｍ／分に相当する。
　この場合、例えば、除菌フィルタの断面積が２５０ｃｍ2である場合、空気の流速は、３．４ｍ3／分ないし４．１４ｍ3／分程度となる。
　本発明の方法は、上記のように、屋内の空気が、次亜塩素酸を含む水溶液を含浸した除菌フィルタを通過するものであるため、その際、前記水溶液は蒸発することとなり、結果として屋内は加湿される。 The indoor air is returned to the indoor through the sterilization filter impregnated with the aqueous solution containing hypochlorous acid, and this is achieved, for example, by blowing indoor air to the sterilization filter with a blower. .
The blower is a fan motor including a blower fan, and examples of the blower fan include a sirocco fan and a cross flow fan. A fan motor with a sirocco fan is preferred.
It is preferable to remove the dust contained in the indoor air through an air purification filter before being sent to the blower.
In the present invention, the indoor supply amount of the aqueous solution containing hypochlorous acid is adjusted to a range of 200 mL / hour to 730 mL / hour at a room temperature of 20 ° C. and a relative humidity of 30%.
More preferably, the humidification amount at a room temperature of 20 ° C. and a relative humidity of 30% is in the range of 400 mL / hour to 600 mL / hour.
In this case, the speed of the air passing through the sterilization filter (wind speed) corresponds to 120 to 180 m / min.
In this case, for example, when the cross-sectional area of the sterilization filter is 250 cm 2 , the air flow rate is about 3.0 m 3 / min to 4.5 m 3 / min.
Moreover, the thing in which the humidification amount in room temperature 20 degreeC and 30% of relative humidity becomes the range of 450 to 550 mL / hour is also preferable.
In this case, the speed of the air passing through the sterilization filter (wind speed) corresponds to 135 to 160 m / min.
In this case, for example, if the cross-sectional area of the sterilization filter is 250 cm 2, the flow rate of air to no 3.4 m 3 / min a 4.14m 3 / min extent.
In the method of the present invention, as described above, indoor air passes through a sterilization filter impregnated with an aqueous solution containing hypochlorous acid. At that time, the aqueous solution evaporates, and as a result, The interior is humidified.
　本発明はまた、上記した屋内の空気を清浄化する方法に使用するための装置に関する。
　本発明の屋内の空気を清浄化する装置は、本体内に形成された空気通路部が、本体側方の吸気口と本体上部の吹出口とにおいて外気と連通する装置本体と、
　屋内の空気を前記吸気口より取り入れ、前記空気通路部に流送し、そして前記吹出口より放出する送風機と、
　前記空気通路部内を流送される空気が吹き当てられそして通過する除菌フィルタと、
　該除菌フィルタがトレイ内において、次亜塩素酸を含む水溶液が含浸されるように備えられた含浸トレイと、
　次亜塩素酸を含む水溶液が充填された交換可能なカートリッジ容器と、そして
　次亜塩素酸を含む水溶液が該カートリッジ容器より前記含浸トレイに流入する溶液流路とを備えてなることを特徴とする。 The invention also relates to an apparatus for use in the method for cleaning indoor air as described above.
The apparatus for purifying indoor air of the present invention has an apparatus main body in which an air passage portion formed in the main body communicates with outside air at the air inlet on the side of the main body and the air outlet at the top of the main body,
A blower that takes in indoor air from the intake port, sends it to the air passage portion, and discharges it from the blowout port;
A sterilization filter that is blown and passes air that is flowed through the air passage portion;
An impregnation tray provided so that the sanitizing filter is impregnated with an aqueous solution containing hypochlorous acid in the tray;
A replaceable cartridge container filled with an aqueous solution containing hypochlorous acid, and a solution flow path through which the aqueous solution containing hypochlorous acid flows into the impregnation tray from the cartridge container .
　本発明の屋内の空気を清浄化する装置を図２を用いて説明する。
　次亜塩素酸を含む水溶液６は、交換可能なカートリッジ容器４に蓄えられており、次亜塩素酸を含む水溶液６は、水受部７を介してカートリッジ容器４から流出し、溶液流路を通って含浸トレイ５に流入する。該含浸トレイ内には除菌フィルタ３が設置されているため、該除菌フィルタ３の底面は含浸トレイ５に供給された次亜塩素酸を含む水溶液に浸され、該水溶液は毛細管現象により除菌フィルタ３全体に吸い上げられ、結果として、除菌フィルタ３は、次亜塩素酸を含む水溶液６により含浸されることとなる。
　一方、屋内の空気は、装置本体側方の吸気口から装置内に入って、ファンモーター１の回転軸に結合する送風ファン２に供給される。送風ファン２に供給された空気は加速されて、送風口１０から下向きに吹出し、次亜塩素酸を含む水溶液６により含浸された除菌フィルタ３に送風される。送風された空気は、除菌フィルタ３内を通過し、背面板８の内側に形成される風路を通って、吹出口９から屋内へ吐出される。
　上記の場合、空気通路部は、装置本体側方の吸気口　→　送風ファン２　→　送風口１０　→　除菌フィルタ３　→　背面板８の内側に形成される風路　→　吹出口９となる。 An apparatus for purifying indoor air according to the present invention will be described with reference to FIG.
The aqueous solution 6 containing hypochlorous acid is stored in the replaceable cartridge container 4, and the aqueous solution 6 containing hypochlorous acid flows out of the cartridge container 4 through the water receiving part 7 and passes through the solution flow path. And flows into the impregnation tray 5. Since the sterilization filter 3 is installed in the impregnation tray, the bottom surface of the sterilization filter 3 is immersed in an aqueous solution containing hypochlorous acid supplied to the impregnation tray 5 and the aqueous solution is removed by capillary action. As a result, the sterilizing filter 3 is impregnated with the aqueous solution 6 containing hypochlorous acid.
On the other hand, indoor air enters the apparatus through an air inlet on the side of the apparatus main body and is supplied to the blower fan 2 coupled to the rotation shaft of the fan motor 1. The air supplied to the blower fan 2 is accelerated, blown downward from the blower port 10, and blown to the sterilization filter 3 impregnated with the aqueous solution 6 containing hypochlorous acid. The blown air passes through the sterilization filter 3, passes through an air passage formed inside the back plate 8, and is discharged indoors from the air outlet 9.
In the above case, the air passage portion is in the form of an air inlet on the side of the apparatus main body → the air blowing fan 2 → the air blowing port 10 → the sterilizing filter 3 → the air passage formed inside the back plate 8 → the air outlet 9.
　本発明の装置の１態様を図３ないし５を用いて説明する。
　本発明の装置の１態様の外観を図３に示した。
　本発明の装置は、前面に前パネル１７を有し、上面に天板２０、操作部２１、取っ手１９及び吹出口９を有する。ここで、吹出口９は、不使用時には閉じており、運転時にルーバーを開いて使用される。装置本体側方の一方には、吸気口１８を有するが、吸気口１８の内側には、空気浄化フィルターが存在する。
　また、本発明の装置は、背面に交換可能なカートリッジ容器４及びカートリッジ容器蓋板２３を有し、吸気口１８を有する側面と逆側の側面には、周側板２２を有する。 One embodiment of the apparatus of the present invention will be described with reference to FIGS.
The appearance of one embodiment of the apparatus of the present invention is shown in FIG.
The apparatus of the present invention has a front panel 17 on the front surface and a top plate 20, an operation unit 21, a handle 19, and an air outlet 9 on the upper surface. Here, the air outlet 9 is closed when not in use, and is used by opening the louver during operation. An air inlet 18 is provided on one side of the apparatus main body, and an air purification filter is present inside the air inlet 18.
The apparatus of the present invention has a replaceable cartridge container 4 and a cartridge container lid plate 23 on the back surface, and a peripheral side plate 22 on the side surface opposite to the side surface having the air inlet 18.
　本発明の装置の１態様を分解した際の外観を図４に示した。
　本発明の装置は、装置主要部２４、底板部２６、交換可能なカートリッジ容器４、保持体１３及び１４と一体となった除菌フィルタ３及び背面板８の一部分２５に、簡単に分解できる。ここで、底板部２６には、次亜塩素酸を含む水溶液を供給する含浸トレイ５が形成されており、この含浸トレイ５の中に、保持体１３及び１４と一体となった除菌フィルタ３が設置される。
　底板部２６には、水受部７及び次亜塩素酸を含む水溶液を含浸トレイ５に供給するための溶液流路２７が形成される。 FIG. 4 shows an external appearance when one embodiment of the apparatus of the present invention is disassembled.
The apparatus of the present invention can be easily disassembled into a part 25 of the apparatus main part 24, the bottom plate part 26, the replaceable cartridge container 4, the sterilization filter 3 integrated with the holding bodies 13 and 14, and the back plate 8. Here, an impregnation tray 5 for supplying an aqueous solution containing hypochlorous acid is formed on the bottom plate portion 26, and the sterilization filter 3 integrated with the holding bodies 13 and 14 in the impregnation tray 5. Is installed.
The bottom plate portion 26 is formed with a solution flow passage 27 for supplying the water receiving portion 7 and an aqueous solution containing hypochlorous acid to the impregnation tray 5.
　上記のように、本発明の装置の１態様について説明したが、上述の説明に基づいて当業者にとって種々の代替例、修正又は変形が可能であり、本発明の趣旨を逸脱しない範囲で前述の種々の代替例、修正又は変形を包含するものである。 As described above, one aspect of the device of the present invention has been described. However, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the above-described embodiments can be used without departing from the spirit of the present invention. Various alternatives, modifications or variations are encompassed.
実施例１：浮遊ウィルスの抑制性能評価（２５ｍ3空間）
１）目的
　加湿水として次亜塩素酸水を入れた空間清浄システムによって、浮遊ウィルスがどの程度抑制させるかを、日本電機工業会「空気清浄機の浮遊ウィルスに対する除去能評価試験方法」に準拠し、６畳の空間に相当する２５ｍ3試験チャンバーを用いて評価した。
２）試験機関
　一般財団法人　北里環境科学センター
３）実施期間
　平成２５年７月１７日～平成２５年７月２３日
４）試験品（「空間清浄システム」）
　使用装置：図３ないし５で示される装置
　除菌フィルタ：５０質量％のレーヨンと５０質量％のＰＶＡとから構成される厚さ０．５ｍｍの平板状の不織布と、同一の素材から構成される厚さ０．５ｍｍの波状の不織布とを交互に積層して構成されるコルゲート構造体であって、そのセルサイズは、段高が３ｍｍであり、ピッチが、６ｍｍであり、連通孔の孔長、即ち、正面から背面までの距離は５．５ｃｍであり、断面積、即ち、正面の面積は、２５０ｃｍ2であるフィルタを用いた。
　次亜塩素酸を含む水溶液：ｐＨ５ないし７に調整された、次亜塩素酸ナトリウムの濃度、約３０００ｐｐｍの水溶液を事前に用意しておき、使用直前にこれを水道水で希釈して、次亜塩素酸ナトリウムの濃度、約６０ｐｐｍの水溶液（ｐＨ５ないし７）として使用した。
　運転条件：室温２０℃、相対湿度３０％の加湿量が５００ｍＬ／時間となる運転条件（中運転モード）で使用した。
（除菌フィルタを通過する空気の速度（風速）は、１５０ｍ／分に相当し、空気の流速は、３．７７ｍ3／分に相当する。） Example 1: Evaluation of suppression performance of airborne viruses (25 m 3 space)
1) Purpose The extent to which airborne viruses are suppressed by a space cleaning system containing hypochlorous acid water as humidified water conforms to the Japan Electrical Manufacturers' Association “Evaluation test method for air purifier removal of airborne viruses”. Evaluation was performed using a 25 m 3 test chamber corresponding to a space of 6 tatami mats.
2) Testing Organization Kitasato Environmental Science Center 3) Implementation Period July 17, 2013-July 23, 2013 4) Test Product ("Space Clean System")
Device used: device shown in FIGS. 3 to 5 Bacteria-removing filter: a flat non-woven fabric having a thickness of 0.5 mm composed of 50 mass% rayon and 50 mass% PVA, and the same material. It is a corrugated structure formed by alternately laminating corrugated nonwoven fabrics with a thickness of 0.5 mm, the cell size is 3 mm in height, the pitch is 6 mm, and the hole length of the communication hole That is, a filter having a front-to-back distance of 5.5 cm and a cross-sectional area, that is, a front area of 250 cm 2 was used.
Aqueous solution containing hypochlorous acid: Prepare an aqueous solution of about 3000 ppm of sodium hypochlorite, adjusted to pH 5 to 7, and dilute it with tap water just before use. It was used as an aqueous solution (pH 5 to 7) having a concentration of sodium chlorate of about 60 ppm.
Operating conditions: Used at operating conditions (medium operating mode) in which the humidification amount at a room temperature of 20 ° C. and a relative humidity of 30% was 500 mL / hour.
(The speed of air passing through the sterilization filter (wind speed) corresponds to 150 m / min, and the flow rate of air corresponds to 3.77 m 3 / min.)
５）試験微生物
　　ウィルス：Ｅｓｃｈｅｒｉｃｈｉａ　ｃｏｌｉ　ｐｈａｇｅ　ＭＳ２　ＮＢＲＣ　１０２６１９（大腸菌ファージ）
　　宿主菌：Ｅｓｃｈｅｒｉｃｈｉａ　ｃｏｌｉ　ＮＢＲＣ　１０６３７３（大腸菌）
６）試薬及び機器・器材
　ａ．主な試薬・培地
　　・Ｎｕｔｒｉｅｎｔ　Ｂｒｏｔｈ（Ｄｉｆｃｏ）
　　・塩化ナトリウム（和光、特級）
　　・Ａｇａｒ（Ｄｉｆｃｏ）
　　・普通寒天培地（日本）
　　・リン酸緩衝生理食塩液（ＭＶ－２２５、エルメックス）
　　・チオ硫酸ナトリウム（和光、一級）
　ｂ．主な機器・器材
　　・２５ｍ3試験チャンバー（３．３×３．５×２．２ｍ、アメニティテクノロジー）
　　・攪拌ファン（ＢＳ－Ｂ－２５、Ｙａｍａｚｅｎ）
　　・レーザー式パーティクルカウンター（ＭＯＤＥＬ３８８６、日本カノマックス）
　　・温湿度計（ＴＲ－７２Ｕｉ、Ｔ＆Ｄ）
　　・ガラス製ネブライザー（特注品）
　　・ガラス製ミゼットインピンジャー（特注品）
　　・塩素検知管（Ｎｏ．８ＬＬ、ガステック）
　　・気体採取器（ガステック）
　　・メンブランフィルタ（８０２４－０４５、ＩＷＡＫＩ）
　　・インキュベーター（ＭＩＲ－１５３、ＭＩＲ－５５３、三洋） 5) Test microorganism Virus: Escherichia coli phage MS2 NBRC 102619 (E. coli phage)
Host fungus: Escherichia coli NBRC 106373 (E. coli)
6) Reagents and equipment / equipment a. Main Reagents / Medium ・ Nutrient Broth (Difco)
・ Sodium chloride (Wako, special grade)
・ Agar (Difco)
・ Normal agar medium (Japan)
・ Phosphate buffered saline (MV-225, Elmex)
・ Sodium thiosulfate (Wako, first grade)
b. Main equipment / equipment ・ 25m 3 test chamber (3.3 × 3.5 × 2.2m, amenity technology)
・ Agitating fan (BS-B-25, Yamazen)
・ Laser type particle counter (MODEL 3886, Nippon Kanomax)
・ Temperature and humidity meter (TR-72Ui, T & D)
・ Glass nebulizer (custom product)
・ Glass midget impinger (special order)
・ Chlorine detector tube (No.8LL, GASTECH)
・ Gas collector (Gastech)
・ Membrane filter (8024-045, IWAKI)
・ Incubator (MIR-153, MIR-553, Sanyo)
７）方法
　日本電機工業会「空気清浄機の浮遊ウィルスに対する除去能評価試験方法」（２０１１年７月４日制定）に準じた。２５ｍ3の試験チャンバー内に試験品（「空間清浄システム」）を設置し、チャンバー内に試験ウィルス液を噴霧、浮遊させた。初発（０分）の浮遊ウィルスをインピンジャーで捕集後、試験品の運転を開始した。その後、経時的にチャンバー内の浮遊ウィルスを捕集し、浮遊ウィルス数を測定した。尚、対照として、自然減衰するウィルス数を測定した。詳細を以下に示した。
　ａ．試験系
　試験系を図６、７に示した。２５ｍ3試験チャンバー内に試験品と攪拌ファン、及びレーザー式パーティクルカウンター、温湿度計をそれぞれ設置した。チャンバーの一側面には、ウィルス液噴霧口と浮遊ウィルス捕集口を設け、それぞれウィルス液噴霧器具と浮遊ウィルス捕集器具を接続した。ウィルス液噴霧器具として、ウィルス液を入れたガラス製ネブライザーを使用した。浮遊ウィルス捕集器具として、捕集液を入れたガラス製ミゼットインピンジャーを使用した。
　ｂ．ウィルス液の調製
　Ｎｕｔｒｉｅｎｔ　Ｂｒｏｔｈで、３６±１℃にて一晩培養した宿主菌液に、試験ウィルスを接種し、半流動寒天（Ｎｕｔｒｉｅｎｔ　Ｂｒｏｔｈ＋０．５％ＮａＣｌ＋０．５％Ａｇａｒ）と混合して普通寒天培地に重層した。３６±１℃で１８時間培養後、宿主菌を遠心除去し、孔径０．２２μｍのメンブランフィルタでろ過して約１０11ＰＦＵ／ｍＬの試験ウィルス液を得た。これを滅菌イオン交換水で１００倍希釈し、試験に供した。
　ｃ．ウィルス液の噴霧
　ウィルス液を入れたガラス製ネブライザーに、コンプレッサーから圧縮空気を送り出し、ウィルス液をチャンバー内へ毎分約０．２ｍＬで１０分間噴霧して浮遊させた。尚、コンプレッサーからの吐出空気圧を１．５ｋｇｆ／ｃｍ2、吐出空気量を７．２５Ｌ／分とした。
　ｄ．浮遊ウィルスの捕集
　捕集液として０．０１５％チオ硫酸ナトリウム添加リン酸緩衝生理食塩液２０ｍＬを入れたガラス製インピンジャーを用いた。１回の捕集につき、毎分１０Ｌで１分間（＝１０Ｌ）のチャンバー内の空気を吸引し、浮遊ウィルスを捕集した。
　ｅ．操作
　チャンバー内の攪拌ファンを作動させながらウィルス液を１０分間噴霧し、２分攪拌した後にチャンバー内空気から初発（０分）の浮遊ウィルスを捕集した。その後、攪拌ファンを止め、試験品を、室温２０℃、相対湿度３０％の加湿量が５００ｍＬ／時間となる運転条件（中運転モード）で運転し、１０、２０、３０、４０分後に浮遊ウィルスを捕集した。尚、試験品の運転を行わずに、ウィルスを自然減衰させ、上記と同様に浮遊ウィルスを捕集したものを対照とした。
　ｆ．浮遊ウィルス数の測定
　浮遊ウィルス捕集後、ミゼットインピンジャー内の捕集液を試料原液とし、リン酸緩衝生理食塩液で１０倍段階希釈列を作製した。その試料原液または希釈液と宿主菌を半流動寒天に混合して普通寒天培地に重層し、３６±１℃で１８時間培養した。培養後、培地上に発生したプラーク数を数え、空気１０Ｌ当りの浮遊ウィルス数を求めた。
　ｇ．塩素ガス濃度の測定
　所定時間作用後に、塩素検知管で試験チャンバー内の空気を吸引し、チャンバー内の塩素濃度を測定した。 7) Method According to the Japan Electrical Manufacturers' Association “Test method for evaluating the ability of air purifiers to remove airborne viruses” (established July 4, 2011). A test article (“space cleaning system”) was placed in a 25 m 3 test chamber, and a test virus solution was sprayed and suspended in the chamber. After collecting the first (0 minutes) airborne virus with an impinger, the test product was started. Thereafter, airborne viruses in the chamber were collected over time, and the number of airborne viruses was measured. As a control, the number of spontaneously decaying viruses was measured. Details are shown below.
a. Test System The test system is shown in FIGS. A test article, a stirring fan, a laser particle counter, and a temperature / humidity meter were installed in a 25 m 3 test chamber. A virus solution spray port and a floating virus collection port were provided on one side of the chamber, and a virus solution spray device and a floating virus collection device were connected to each. A glass nebulizer containing virus solution was used as a virus solution spraying device. A glass midget impinger containing a collection solution was used as a floating virus collection device.
b. Preparation of virus solution Host bacterial solution cultured overnight at 36 ± 1 ° C in Nutrient Broth is inoculated with test virus, mixed with semi-fluid agar (Nutrient Broth + 0.5% NaCl + 0.5% Agar) and ordinary agar Overlaid on the medium. After culturing at 36 ± 1 ° C. for 18 hours, the host bacteria were removed by centrifugation and filtered through a membrane filter having a pore size of 0.22 μm to obtain a test virus solution of about 10 11 PFU / mL. This was diluted 100 times with sterilized ion-exchanged water and used for the test.
c. Spraying of virus solution Compressed air was sent from a compressor to a glass nebulizer containing virus solution, and the virus solution was sprayed into the chamber at about 0.2 mL for 10 minutes to float. The discharge air pressure from the compressor was 1.5 kgf / cm 2 and the discharge air amount was 7.25 L / min.
d. Collection of airborne virus A glass impinger containing 20 mL of phosphate buffered saline containing 0.015% sodium thiosulfate was used as a collection solution. For each collection, air in the chamber was aspirated at 10 L per minute for 1 minute (= 10 L) to collect floating viruses.
e. Operation The virus solution was sprayed for 10 minutes while operating the stirring fan in the chamber. After stirring for 2 minutes, the first (0 minute) floating virus was collected from the air in the chamber. Thereafter, the stirring fan was stopped, and the test product was operated under the operating conditions (medium operation mode) in which the humidification amount at room temperature of 20 ° C. and relative humidity of 30% was 500 mL / hour, and after 10, 20, 30, and 40 minutes, the floating virus Was collected. In addition, it was set as the control | contrast what carried out the natural attenuation | damping of the virus without collecting the test product and collected the floating virus in the same manner as described above.
f. Measurement of the number of floating viruses After collecting the floating viruses, the collected solution in the midget impinger was used as a sample stock solution, and a 10-fold serial dilution series was prepared with phosphate buffered saline. The sample stock solution or diluted solution and the host bacteria were mixed with semi-fluid agar, overlaid on a normal agar medium, and cultured at 36 ± 1 ° C. for 18 hours. After the culture, the number of plaques generated on the medium was counted, and the number of suspended viruses per 10 L of air was determined.
g. Measurement of chlorine gas concentration After acting for a predetermined time, air in the test chamber was sucked with a chlorine detector tube, and the chlorine concentration in the chamber was measured.
８）結果
　噴霧した試験ウィルス液のウィルス数は４．６×１０９ＰＦＵ／ｍＬであった。
　加湿水として用いた先浄水の有効塩素濃度は、試験開始時で６０ｍｇ／Ｌ（ｐＨ：５）、試験終了時のカートリッジ容器内で５３ｍｇ／Ｌ、含浸トレイで３２ｍｇ／Ｌであった。尚、加湿量は４０分で２５０ｍＬであった。
　表１に経過時間ごとの浮遊ウィルス数を示し、また、その際の浮遊ウィルス数の変化を示すグラフを図８に示した。
　尚、図８に示した浮遊ウィルス数に関する近似式の傾き（１分間当りに変化する浮遊ウィルス数の対数値）は、対照が－０．００６６１であり、試験品が－０．２００００であった。
　従って、初期からの浮遊ウィルス数の対数減少値は１０分間で対照が０．０７ｌｏｇ10、試験品が２．００ｌｏｇ10であり、２０分間で対象が０．１３ｌｏｇ10、試験品が４．００ｌｏｇ10であった。
　対照を基準として、ウィルス数の対数減少値（減少率*）を比較すると、試験品によって１０分間で１．９３ｌｏｇ10（９８．８％）、２０分間で３．８７ｌｏｇ10（９９．９８％）減少した。尚、対数減少値が２．０ｌｏｇ10（９９％）以上に達するのに要する時間は１１分であった。
　このことは、試験品の使用により、屋内に漂うウィルスや細菌を短時間で効率よく除去することを明確に示す。
*注：対数減少値１．０は、９０％減少、２．０は９９％減少である。計算式は以下のようになる。
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-T000002
 　表２に試験時におけるチャンバー内の塩素ガス濃度を示した。
Figure JPOXMLDOC01-appb-T000003
 　表３に初期値０分を１００％とした時の浮遊ウィルス残存率を示し、また、その際の浮遊ウィルス残存率の変化を示すグラフを図９に示した。
Figure JPOXMLDOC01-appb-T000004
 　参考データとして、対照の試験時におけるチャンバー内の浮遊粒子数の変化を示すグラフを図１０に示し、試験品の試験時におけるチャンバー内の浮遊粒子数の変化を示すグラフを図１１に示し、対照の試験時におけるチャンバー内温湿度の変化を示すグラフを図１２に示し、試験品の試験時におけるチャンバー内温湿度の変化を示すグラフを図１３に示した。 8) Results The number of viruses in the sprayed test virus solution was 4.6 × 10 9 PFU / mL.
The effective chlorine concentration of pre-purified water used as humidified water was 60 mg / L (pH: 5) at the start of the test, 53 mg / L in the cartridge container at the end of the test, and 32 mg / L in the impregnation tray. The humidification amount was 250 mL in 40 minutes.
Table 1 shows the number of suspended viruses for each elapsed time, and FIG. 8 is a graph showing the change in the number of suspended viruses at that time.
The slope of the approximate expression for the number of floating viruses shown in FIG. 8 (logarithm of the number of floating viruses that change per minute) was −0.00661 for the control and −0.20000 for the test product. .
Therefore, log reduction of the number of floating viruses from early control at 10 minutes 0.07Log 10, specimen is 2.00Log 10, subject 20 minutes 0.13Log 10, the test article 4.00Log 10 Met.
Comparing the logarithmic reduction in the number of viruses (decrease rate * ) relative to the control, it was 1.93 log 10 (98.8%) in 10 minutes and 3.87 log 10 (99.98%) in 20 minutes depending on the test article. Diminished. The time required for the logarithmic decrease value to reach 2.0 log 10 (99%) or more was 11 minutes.
This clearly shows that the use of the test product efficiently removes viruses and bacteria floating in the room in a short time.
* Note: A log reduction value of 1.0 is a 90% reduction, and 2.0 is a 99% reduction. The calculation formula is as follows.
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-T000002
 Table 2 shows the chlorine gas concentration in the chamber during the test.
Figure JPOXMLDOC01-appb-T000003
 Table 3 shows the residual rate of airborne virus when the initial value of 0 minute is 100%, and FIG. 9 is a graph showing the change in the residual rate of airborne virus at that time.
Figure JPOXMLDOC01-appb-T000004
 As reference data, a graph showing the change in the number of suspended particles in the chamber at the time of the control test is shown in FIG. 10, a graph showing the change in the number of suspended particles in the chamber at the time of the test of the test product is shown in FIG. FIG. 12 shows a graph showing changes in the chamber temperature and humidity during the test, and FIG. 13 shows a graph showing changes in the chamber temperature and humidity during the test of the test product.
１：ファンモーター
２：送風ファン
３：除菌フィルタ
４：交換可能なカートリッジ容器
５：含浸トレイ
６：次亜塩素酸を含む水溶液
７：水受部
８：背面板
９：吹出口
１０：送風口
１１：波状の布体
１２：平板状の布体
１３：保持体
１４：保持体
１５：係止部
１６：係合溝
１７：前パネル
１８：吸気口
１９：取っ手
２０：天板
２１：操作部
２２：周側板
２３：カートリッジ容器蓋板
２４：装置主要部
２５：背面板（一部分）
２６：底板部
２７：溶液流路 1: Fan motor 2: Blower fan 3: Bactericidal filter 4: Replaceable cartridge container 5: Impregnation tray 6: Aqueous solution containing hypochlorous acid 7: Water receiving part 8: Back plate 9: Outlet 10: Blower 11: Wavy cloth body 12: Flat cloth body 13: Holding body 14: Holding body 15: Locking portion 16: Engaging groove 17: Front panel 18: Air inlet 19: Handle 20: Top plate 21: Operating portion 22: peripheral side plate 23: cartridge container lid plate 24: apparatus main part 25: back plate (part)
26: Bottom plate portion 27: Solution flow path

Claims (5)

  1. 取り入れられた屋内の空気を、次亜塩素酸を含む水溶液を含浸した除菌フィルタに通して再び屋内に戻すことにより、屋内の空気を清浄化する方法であって、
    　前記次亜塩素酸を含む水溶液は、次亜塩素酸の濃度が２０ｐｐｍ乃至２００ｐｐｍの範囲にあるｐＨ５乃至ｐＨ７の液であり、そして
    　次亜塩素酸を含む水溶液の屋内への供給量は、室温２０℃及び相対湿度３０％において、２００ｍＬ／時間乃至７３０ｍＬ／時間の範囲にある、方法。     A method of purifying indoor air by passing the taken indoor air through an antibacterial filter impregnated with an aqueous solution containing hypochlorous acid and returning the indoor air again.
    The aqueous solution containing hypochlorous acid is a solution of pH 5 to pH 7 in which the concentration of hypochlorous acid is in the range of 20 ppm to 200 ppm, and the amount of aqueous solution containing hypochlorous acid supplied to the room is 20 room temperature. A method in the range of 200 mL / hr to 730 mL / hr at 0 C and 30% relative humidity.
  2. 前記次亜塩素酸を含む水溶液は、該水溶液が充填される交換可能なカートリッジ容器より、前記除菌フィルタが備えられた含浸トレイ内に流入される機構となっている、請求項１記載の方法。 2. The method according to claim 1, wherein the aqueous solution containing hypochlorous acid has a mechanism of flowing from an exchangeable cartridge container filled with the aqueous solution into an impregnation tray equipped with the sterilization filter. .
  3. 前記除菌フィルタは、正面から背面に通じる多数の連通孔を有するコルゲート構造体からなり、該連通孔は、４ｍｍ乃至７ｍｍの孔径及び４．５ｃｍ乃至６．５ｃｍの孔長を有する、請求項１又は請求項２記載の方法。 The sterilization filter is composed of a corrugated structure having a large number of communication holes leading from the front to the back, and the communication holes have a hole diameter of 4 mm to 7 mm and a hole length of 4.5 cm to 6.5 cm. Alternatively, the method according to claim 2.
  4. 前記コルゲート構造体は、４０乃至６０質量％のレーヨンと６０乃至４０質量％のＰＶＡとからなる不織布より作られている、請求項３記載の方法。 The method according to claim 3, wherein the corrugated structure is made of a non-woven fabric composed of 40 to 60 mass% rayon and 60 to 40 mass% PVA.
  5. 請求項１乃至請求項４のうちいずれか一項記載の方法に使用するための装置であって、
    　本体内に形成された空気通路部が、本体側方の吸気口と本体上部の吹出口とにおいて外気と連通する装置本体と、
    　屋内の空気を前記吸気口より取り入れ、前記空気通路部に流送し、そして前記吹出口より放出する送風機と、
    　前記空気通路部内を流送される空気が吹き当てられそして通過する除菌フィルタと、
    　該除菌フィルタがトレイ内において、次亜塩素酸を含む水溶液が含浸されるように備えられた含浸トレイと、
    　次亜塩素酸を含む水溶液が充填された交換可能なカートリッジ容器と、そして
    　次亜塩素酸を含む水溶液が該カートリッジ容器より前記含浸トレイに流入する溶液流路とを備えてなる、
    屋内の空気を清浄化する装置。     An apparatus for use in a method according to any one of claims 1 to 4, comprising:
    An apparatus main body in which an air passage portion formed in the main body communicates with outside air at an air inlet on the side of the main body and an air outlet at the top of the main body,
    A blower that takes in indoor air from the intake port, sends it to the air passage portion, and discharges it from the blowout port;
    A sterilization filter that is blown and passes air that is flowed through the air passage portion;
    An impregnation tray provided so that the sanitizing filter is impregnated with an aqueous solution containing hypochlorous acid in the tray;
    A replaceable cartridge container filled with an aqueous solution containing hypochlorous acid, and a solution flow path through which the aqueous solution containing hypochlorous acid flows into the impregnation tray from the cartridge container;
    A device that cleans indoor air.
PCT/JP2014/060961 2013-10-01 2014-04-17 Method for purifying air in room, and device for use in same WO2015049891A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-206404 2013-10-01
JP2013206404A JP2016202191A (en) 2013-10-01 2013-10-01 Indoor air purification method and apparatus used for the same

Publications (1)

Publication Number Publication Date
WO2015049891A1 true WO2015049891A1 (en) 2015-04-09

Family

ID=52778488

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/060961 WO2015049891A1 (en) 2013-10-01 2014-04-17 Method for purifying air in room, and device for use in same

Country Status (2)

Country Link
JP (1) JP2016202191A (en)
WO (1) WO2015049891A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108949554A (en) * 2017-05-22 2018-12-07 菏泽学院 Carbon dioxide cell incubator removes mould device automatically
CN109028325A (en) * 2018-06-24 2018-12-18 张冠 A kind of Water-filtering air cleaner and its formaldehyde minimizing technology
JP2019154884A (en) * 2018-03-15 2019-09-19 株式会社グリーンウェル Sterilization/deodorization system using hypochlorite tablet
CN111829129A (en) * 2020-07-23 2020-10-27 武汉合创四联科技发展有限公司 Ventilation equipment for building construction
CN112696781A (en) * 2020-12-25 2021-04-23 东莞市鹏驰净化科技有限公司 Air purification equipment
CN113260444A (en) * 2019-01-08 2021-08-13 松下知识产权经营株式会社 Air purifying device
FR3111569A1 (en) * 2020-06-22 2021-12-24 Alain HILAIRE Apparatus for treating the air and the interior surfaces of a room comprising a turbine and a reservoir of decontaminating liquid composition for mixing with the air to be treated sucked in by the turbine.
WO2023023911A1 (en) * 2021-08-23 2023-03-02 卡富环球有限公司 Air purification device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020145165A1 (en) * 2019-01-08 2020-07-16 パナソニックＩｐマネジメント株式会社 Air purification device
WO2021256475A1 (en) * 2020-06-16 2021-12-23 株式会社エコ革 Air purification device and air suction device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140718A (en) * 1978-04-20 1979-11-01 Arigaa Howaado Sterilizing method and composition
JPS63303905A (en) * 1987-06-02 1988-12-12 Osaka Soda Co Ltd Prevention of mildew
JP2003074917A (en) * 2001-08-29 2003-03-12 Sanyo Electric Co Ltd Humidifier
JP2005156006A (en) * 2003-11-25 2005-06-16 Mitsubishi Paper Mills Ltd Element for humidifier
JP2006192097A (en) * 2005-01-14 2006-07-27 Tohoku Univ Air sterilization and deodorization apparatus
JP2010091240A (en) * 2008-10-13 2010-04-22 Toyohiko Doi Liquid spray method and spray apparatus
JP2011012859A (en) * 2009-06-30 2011-01-20 Sanyo Electric Co Ltd Humidifier
JP2011050702A (en) * 2009-09-04 2011-03-17 Es Technology Kk Method and device for sterilization and deodorization

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140718A (en) * 1978-04-20 1979-11-01 Arigaa Howaado Sterilizing method and composition
JPS63303905A (en) * 1987-06-02 1988-12-12 Osaka Soda Co Ltd Prevention of mildew
JP2003074917A (en) * 2001-08-29 2003-03-12 Sanyo Electric Co Ltd Humidifier
JP2005156006A (en) * 2003-11-25 2005-06-16 Mitsubishi Paper Mills Ltd Element for humidifier
JP2006192097A (en) * 2005-01-14 2006-07-27 Tohoku Univ Air sterilization and deodorization apparatus
JP2010091240A (en) * 2008-10-13 2010-04-22 Toyohiko Doi Liquid spray method and spray apparatus
JP2011012859A (en) * 2009-06-30 2011-01-20 Sanyo Electric Co Ltd Humidifier
JP2011050702A (en) * 2009-09-04 2011-03-17 Es Technology Kk Method and device for sterilization and deodorization

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108949554A (en) * 2017-05-22 2018-12-07 菏泽学院 Carbon dioxide cell incubator removes mould device automatically
JP2019154884A (en) * 2018-03-15 2019-09-19 株式会社グリーンウェル Sterilization/deodorization system using hypochlorite tablet
CN109028325A (en) * 2018-06-24 2018-12-18 张冠 A kind of Water-filtering air cleaner and its formaldehyde minimizing technology
CN109028325B (en) * 2018-06-24 2020-11-24 六安永贞匠道机电科技有限公司 Water filtering type air purifier
CN113260444A (en) * 2019-01-08 2021-08-13 松下知识产权经营株式会社 Air purifying device
CN113260444B (en) * 2019-01-08 2023-06-06 松下知识产权经营株式会社 Air purifying device
FR3111569A1 (en) * 2020-06-22 2021-12-24 Alain HILAIRE Apparatus for treating the air and the interior surfaces of a room comprising a turbine and a reservoir of decontaminating liquid composition for mixing with the air to be treated sucked in by the turbine.
WO2021259951A1 (en) * 2020-06-22 2021-12-30 Hilaire Alain Apparatus for treating air and interior surfaces of premises, comprising a turbine and a tank of decontaminating liquid composition for mixing with the air to be treated that is drawn in by the turbine
CN111829129A (en) * 2020-07-23 2020-10-27 武汉合创四联科技发展有限公司 Ventilation equipment for building construction
CN112696781A (en) * 2020-12-25 2021-04-23 东莞市鹏驰净化科技有限公司 Air purification equipment
WO2023023911A1 (en) * 2021-08-23 2023-03-02 卡富环球有限公司 Air purification device

Also Published As

Publication number Publication date
JP2016202191A (en) 2016-12-08

Similar Documents

Publication Publication Date Title
WO2015049891A1 (en) Method for purifying air in room, and device for use in same
KR101791677B1 (en) Wet air cleaner
JP4928869B2 (en) Air sanitizer
CA2593954C (en) Air filtering apparatus
JP2000257914A (en) Sterilizing air conditioning system using strong acidic water
JP2008048759A (en) Air sterilizing device and air cleaning device
KR101095410B1 (en) Air sterilizing device
KR20180029939A (en) Wet air cleaner
JP2008022765A (en) Device for evaluating environment and method for evaluating environment
CN208075167U (en) Intelligent control type air purifier
CN115698599A (en) Method and device for purifying biological agents and volatile organic compounds from air
WO2008010394A1 (en) Environmental evaluation system and environmental evaluation method
CN103344012A (en) Device and method for purifying air using biological enzymolysis
CN113260444B (en) Air purifying device
JP2010167088A (en) Sterilization and virus deactivation apparatus
JP2008022764A (en) Environment evaluation method
KR20080018115A (en) Air sterilizing device with foreign material removal mechanism
WO2020145165A1 (en) Air purification device
JP2020011011A (en) Air cleaning apparatus
CN113350552A (en) Air purifier
JP3228240U (en) Space sterilization cleaning device
WO2021066203A1 (en) Space sanitizing and cleaning device
CN212547748U (en) Air purifier
CN115121106B (en) Application method of SRR free radical cluster medicament in full-effect air purifier
CN212395468U (en) Air purifier

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14850477

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14850477

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP