JP2013226372A - Air purifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air purifying device capable of reliably performing disinfection using a sterilizing solution.SOLUTION: An air purifying device includes: a housing 50 having an air passage 52 through which air to be disinfected flows; a spray device 53 which sprays a bactericide solution into the air to be disinfected which flows through the air passage; a circulation reservoir 54 for receiving the bactericide solution falling from the air passage; a circulation system 55 for supplying to the spray device the bactericide solution of the circulation reservoir; a drug supply device 56 for supplying the bactericide solution to the circulation system; and a diluent system 571 for supplying a diluent for diluting the bactericide solution. In the purifier, the supply position where the stock solution of the bactericide solution supplied by the drug supply device in the circulation system is made to be different from the supply position where the diluent supplied by the diluent supply system, thereby forming an unused solution region having a high density at an inflow part of the circulation system where the stock solution of the bactericide solution flows in.

Description

  The present invention relates to an air cleaning device having functions of sterilization, deodorization, dust removal, and gas removal.

Conventionally, for example, a sterilization apparatus as shown in Patent Document 1 is known.
What is described in Patent Document 1 removes a blower that circulates air, a cooling and heating coil that adjusts temperature and humidity, a spray nozzle that makes hypochlorous water, which is electrolytic neutral water, contact with air, and scattered water The eliminator is an air conditioner installed inside one or a plurality of cases, and is provided with an electrolysis neutral water generator as a means for supplying electrolysis neutral water to the spray nozzle. The produced hypochlorous water is supplied to the spray nozzle through a pump and a flow rate adjusting valve.

JP 2000-257913

  In patent document 1 mentioned above, since the electrolysis neutral water production | generation apparatus is continuously operated, the means to cool the electrolytic cell of an electrolysis neutral water production | generation apparatus is required. In addition, since the hypochlorous water produced by the electrolyzed neutral water generator is supplied directly to the spray nozzle, it is not possible to store hypochlorous water, and electrolyzed neutral water is produced with a supply capacity corresponding to the spray amount. Requires equipment. Further, when the spray amount is increased or the concentration is increased in order to enhance the sterilization effect, the odor and safety due to chlorine gas become problems. Conversely, if the spray amount is reduced, the sterilization effect is lowered.

  This invention solves an above-described subject, and provides the air purifying apparatus which can perform sterilization by a disinfectant solution reliably.

  In order to solve the above problems, an air cleaning device of the present invention includes a housing having an air passage through which sterilization target air flows from an upstream side to a downstream side, and a sterilizing agent solution sprayed on the sterilization target air flowing through the air passage. A spraying device, a circulation tank for receiving the bactericide solution descending from the air passage, a circulation system for supplying the bactericide solution in the circulation tank to the spraying device, a drug supply device for supplying a stock solution of the bactericide solution, and sterilization A dilution water system for supplying dilution water for diluting the agent solution, and a stock solution of the bactericide solution supplied by the drug supply device in the circulation system of the bactericide solution circulating around the spraying device, the ventilation path of the housing, the circulation tank, and the circulation system By changing the supply position of the dilution water and the supply position of the dilution water supplied by the dilution water system, an unused liquid region having a high concentration of the bactericide solution is provided at the inflow site of the circulation system where the stock solution of the bactericide solution flows. Formed and taken to the patrol system It is characterized in that the entrapped cells are sterilized before spraying.

  In addition, the circulation tank has a strainer that divides the inside into an upstream primary region and a downstream secondary region of the circulation system, the dilution water system is connected to the primary region, and the drug supply device is a secondary that communicates with the circulation system. An unused liquid region is formed in the secondary region by connecting to the region.

Further, the medicine supply device is connected to a circulation system to form an unused liquid region in the circulation system.
In addition, the medicine supply device is connected to an air passage on the downstream side of the spraying device, and an unused disinfectant solution that is directly blown into the air passage separately from the spraying device to form an unused liquid region in the air passage. Features.

  The dilution water system supplies the dilution water to the circulation tank or the circulation system, and the chemical supply device sets an unused area at a position upstream of the dilution water supply position in the flow direction of the bactericide solution in the circulation tank. The forming and spraying device is characterized by spraying a bactericide solution which has been diluted with dilution water to a low concentration.

  In addition, it is arranged across the air flow of the sterilization target air in the air passage, and has a medium that captures the germicide solution sprayed from the spray device, and the circulation tank falls from the germicide solution and the medium that descends from the air passage. It is characterized by receiving the bactericide solution.

  In addition, the spray device is provided with a medium having a high liquid holding amount, and the ratio L / G of the weight L of the bactericide solution to the weight G of the sterilization target air in the atmosphere in the air passage satisfies 0.3 or less. A sterilizing agent solution is sprayed on air to be sterilized in an air passage.

  In addition, a slightly acidic electrolyzed water is used as a stock solution of the bactericide solution.

  As described above, according to the present invention, the sterilizing agent solution is sprayed on the air to be sterilized, the floating bacteria in the air are sterilized by gas-liquid contact with the spray water, and taken into the spray water, and the spray water is collected in the circulation tank. It is configured to be received and sprayed again by the spraying device, and is supplied to the circulation system separately from the stock solution of the bactericide solution to be supplied to the circulation system around the spraying device, the ventilation path of the housing, the circulation tank, and the circulation system. By supplying diluting water for diluting the sterilizing agent solution to different positions in the circulation system, the sterilizing agent solution is introduced into the site where the stock solution of the sterilizing agent solution is introduced into the circulation system path. An unused liquid region having a high concentration is formed. Therefore, until the sprayed germicide solution is sprayed again, the bacteria taken into the circulation system by the spray water pass through the unused liquid region. Therefore, it is possible to reliably sterilize the bacteria trapped in the sterilizing agent solution by spraying before the sterilizing agent solution is sprayed again around the circulation system. As a result, the captured bacteria are not re-scattered with the spray of the bactericide solution, and air with higher safety can be supplied.

  Furthermore, it is arranged in the air passage across the air flow of the air to be sterilized, and has a medium for capturing the disinfectant solution sprayed from the spray device, and the circulation tank falls from the disinfectant solution and the medium descending from the air passage. By receiving the bactericide solution, more airborne bacteria and dust can be taken into the circulation system together with the spray water. As a result, sterilization and sterilization effects can be further enhanced, and advanced and reliable air cleaning can be performed.

  In addition, it is equipped with a medium with a high liquid holding amount, and can perform sterilization and dust removal with a small spray amount by satisfying the ratio L / G of the weight L of the bactericide solution to the weight G of the sterilization target air by 0.3 or less. The pump power of the spraying device can be reduced, and the supply amount of the stock solution of the bactericide solution can be reduced.

  Furthermore, by using slightly acidic electrolyzed water as the stock solution of the bactericide solution, the strength and reactivity of hypochlorous acid (HCLO), which is the main component of the slightly acidic electrolyzed water, are utilized. It can be sterilized. Further, since the sterilizing power is recovered quickly, the sterilizing effect can be maintained high even if the sterilizing agent solution is recycled.

The schematic diagram which shows the air purifying apparatus in embodiment of this invention. The schematic diagram which shows the principal part in other embodiment of this invention. The schematic diagram which shows the principal part in other embodiment of this invention. The schematic diagram which shows the principal part in other embodiment of this invention. A graph showing the relationship between effective chlorine concentration and the time required to sterilize 99% of coliforms Graph showing the relationship between effective chlorine residual rate and pH The schematic diagram which shows the air purifying apparatus in other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, in the air cleaning device, the housing 50 forms a ventilation path 52 through which the sterilization target air 51 flows from the upstream side to the downstream side, and the sterilization target air 51 flows inside the housing 50. A pre-filter 501, an eliminator 502, a spraying device 53, a medium 503, a mist separator 504, and a medium performance filter 505 are arranged in order from the upstream side to the downstream side. The spray device 53 sprays the sterilizing agent solution on the sterilization target air flowing through the air passage 52, and includes a plurality of spray nozzles 531 directed downstream in the flow direction of the sterilization target air 51.

  The medium 503 arranged on the downstream side of the spraying device 53 is better as the liquid holding amount is higher. For example, fibers made of a material such as polyvinyl chloride fiber or stainless wire are regularly knitted with a high porosity. It is made into a mat shape having a thickness of about 10 to 50 mm by being concentrated or irregularly densely packed.

  A circulation tank 54 is provided below the spraying device 53 and the medium 503, and the circulation tank 54 receives the bactericide solution descending from the air passage 52 and the bactericide solution falling from the medium 503. A circulation system 55 is disposed between the circulation tank 54 and the spraying device 53, and the circulation system 55 has a circulation pump 551 and supplies the sterilizing agent solution in the circulation tank 54 to the spraying device 53.

  The spraying device 53, the air passage 52 of the housing 50, the circulation tank 54, and the circulation system 55 form a circulation system of the bactericide solution. A drug supply device 56 for supplying slightly acidic electrolyzed water, which is a stock solution of the bactericide solution, to the circulation system includes a generating device 561 that forms an electrolytic cell for generating slightly acidic electrolyzed water, and a chemical carrying container 562 from the chemical delivery container 562. A raw material supply system 563 having an open / close valve 563d for supplying hydrochloric acid water as a raw material chemical solution, a water supply system 565 having a pressure reducing valve 564 for supplying dilution water to the generating device 561, a circulation tank 54 and a generating device A relay tank 566 disposed between the relay tank 566, a supply pump 567 that supplies a slightly acidic electrolyzed water from the generator 561 to the relay tank 566, and a slightly acidic electrolysis from the relay tank 566 to the circulation tank 54. A relay system 570 including a relay pump 569 for supplying water is provided.

  Slightly acidic electrolyzed water is electrolyzed water designated as a food additive disinfectant under the name of “slightly acidic hypochlorous acid water”. The definition of this slightly acidic hypochlorous acid water is as follows: “Standards for Foods and Additives (December 28, 1959, Ministry of Health, Labor and Welfare Notification No. 370)” and “April 26, 2012, Ministry of Health, Labor and Welfare Notification 345 According to No. ", hydrochloric acid or an aqueous solution adjusted to an appropriate concentration by adding a sodium chloride aqueous solution to hydrochloric acid is electrolyzed in a non-diaphragm electrolysis cell (which is composed of an anode and a cathode not separated by a diaphragm). The main active ingredient is hypochlorous acid (HCLO), pH 5.0-6.5, and effective chlorine concentration 10-80 mg / kg.

  Hypochlorous acid (HCLO) is produced by the dissolution of chlorine gas in water. As shown in FIG. 6, the presence of hypochlorous acid (HCLO) and hypochlorite ion (CLO-) depending on the pH of the water. The ratio changes, and HCLO is overwhelmingly increased in the pH region of slightly acidic electrolyzed water. Both HCLO and CLO- have sterilizing power, but HCLO is overwhelmingly strong.

  The dilution water system 571 branched from the water supply system 565 communicates with the circulation tank 54, and the dilution water system 571 sequentially includes a dilution water control valve 572 and a flow rate adjustment valve 573 at a position downstream from the branch point. Further, a dilution water initial water supply system 574 branched from the water supply system 565 on the upstream side of the dilution water control valve 572 communicates with the dilution water system 571 on the downstream side of the flow rate adjustment valve 573, and the initial water supply to the dilution water initial water supply system 574 is performed. A control valve 575 is interposed.

  A drug initial supply system 576 branched from the drug supply system 568 on the downstream side of the supply pump 567 communicates with the circulation tank 54, and a drug control valve 577 is interposed in the drug initial supply system 576.

  The circulation tank 54 is internally partitioned into a primary area 542 upstream of the circulation system and a secondary area 543 downstream by a strainer 541. The secondary area of the circulation tank 54 includes a circulation system 55 and a relay system 570. A drug initial supply system 576 communicates. The primary region 542 is located below the spraying device 53 and the medium 503 and communicates with a dilution water system 571. An overflow pipe 546 communicates with an upper portion on one side of the primary region 542, and a drain valve 544 communicates with a bottom portion. The drainage system 545 communicates.

The operation of the above configuration will be described below.
(Drug production)
The chemical supply device 56 supplies the raw chemical solution hydrochloric acid from the chemical carry-in container 562 to the generation device 561 through the raw material supply system 563 with the open / close valve 563d opened, and a pressure reducing valve 564 from the water supply system 565 to the generation device 561. Then, water for dilution is supplied, and in the generating device 561, 2-21% hydrochloric acid is used as the electrolyte.

The generating device 561 electrolyzes the electrolytic solution to generate slightly acidic electrolyzed water. The slightly acidic electrolyzed water is supplied to the relay tank 566 through the chemical supply system 568 by the supply pump 567 and further relayed by the relay pump 569. The slightly acidic electrolyzed water is supplied from the relay tank 566 to the circulation tank 54 through 570.
(At the beginning of drug supply)
When filling the circulation tank 54 with the sterilizing agent solution in the initial stage of operation, the chemical supply device 56 opens the initial water supply control valve 575 and supplies the dilution water to the circulation tank 54 through the dilution water initial water supply system 574. The chemical control valve 577 is opened, and slightly acidic electrolyzed water is supplied to the circulation tank 54 through the drug initial supply system 576 by the supply pump 567, and the effective chlorine concentration of the bactericide solution in the circulation tank 54 is set to 0.1-10 mg / L. adjust. For this reason, the time required for water filling of the bactericide solution can be shortened, and the effective chlorine concentration can be easily adjusted.
(During driving)
The medicine supply device 56 supplies the diluted water to the circulation tank 54 through the flow rate adjustment valve 573 while opening the dilution water control valve 572 while supplying the slightly acidic electrolyzed water from the relay tank 566 to the circulation tank 54. The effective chlorine concentration of 54 germicide solution is maintained at 0.1-10 mg / L.

  Then, an unused liquid region having a high concentration is formed by an unused disinfectant solution supplied from the relay tank 566 to the inflow site of the circulation system into which the unused disinfectant solution flows, here, the secondary area 543 of the circulation tank 54. Form. For this reason, even when the sterilizing agent solution is recycled in the circulation system, even if the medicinal effect of the sterilizing agent solution as a sterilizing agent is deteriorated, when the sterilizing agent solution passes through the unused liquid region, Certain sterilization becomes possible.

  Further, since the bactericide solution is supplied to the secondary area 543 downstream of the primary area 542 to which the dilution water of the circulation tank 54 is supplied, the bactericidal solution in the secondary area 543 remains in the circulation tank. Since the contact time with the fungus body, dust and the like is short and difficult to dilute, the disinfectant solution having a high concentration and maintaining the sterilizing effect is supplied to the spraying device 53.

In this state, the sterilizing agent solution is sprayed from the spray nozzle 541 of the spraying device 53 to the sterilization target air 51 flowing from the upstream side to the downstream side through the air passage 52 of the housing 50.
In this spraying, it is preferable that the spraying device 53 sprays the bactericide solution on the sterilization target air 51 in the air passage 52 so as to satisfy the saturation efficiency of 80% or more. This saturation efficiency is obtained by using the difference between the relative humidity H1 of the sterilization target air 51 after spraying the bactericide solution and the relative humidity H0 when the sterilization target air 51 flows in as a numerator, and the saturation relative humidity (100%) H2. And the relative humidity H0 when the sterilization target air 51 flows in is defined as a denominator.

  By satisfying this saturation efficiency of 80% or more, the contact efficiency between the sterilization target air 51 passing through the ventilation path 52 and the bactericide solution is increased, and the removal efficiency of floating bacteria and dust contained in the sterilization target air 51 is increased. Therefore, reliable sterilization of airborne bacteria can be realized.

  Further, the spray device 53 disinfects the air passage 52 so that the ratio L / G of the weight L of the bactericide solution to the weight G of the air to be sterilized in the atmosphere of the air passage 52 satisfies 0.3 or less. It is preferable to spray the bactericide solution on the target air 51. When the ratio L / G of the weight L of the bactericide solution to the weight G of the sterilization target air 51 satisfies 0.3 or less, it is possible to save energy by suppressing the pump power low. In addition, since sterilization and dust removal can be performed with a small spray amount, the consumption of the bactericidal solution is reduced, and the supply amount of the stock solution of the bactericide solution can be reduced.

  In this way, by directly spraying the bactericide solution using the slightly acidic electrolyzed water as a stock solution on the sterilization target air 51, the sterilizing power of hypochlorous acid (HCLO) which is the main component of the slightly acidic electrolyzed water is increased. Now, bacteria in the air can be sterilized using the high reactivity. Further, since the bactericide solution is sprayed into the air with high saturation efficiency, airborne bacteria, dust, and harmful gases can be taken into the bactericide solution, and dust removal can be realized in addition to sterilization.

  Part of the disinfectant solution sprayed from the spraying device 53 descends from the air passage 52 to the circulation tank 54, and the other reaches the medium 503 and then flows through the medium 503 to the circulation tank 54. The circulation tank 54 receives the sterilizing agent solution descending from the air passage 52 and the sterilizing agent solution flowing down from the medium 503.

  The sterilized air that has passed through the medium 503 passes through the mist separator 504 and the medium performance filter 505, and is supplied into the room by a fan device (not shown). The mist separator 504 captures fine mist that has passed through the medium 503 and prevents mist from adhering to the medium performance filter 505.

  The disinfectant solution that has flowed into the primary region 542 of the circulation tank 54 flows through the strainer 541 to the secondary region 543 and passes through the high concentration unused liquid region formed by the unused disinfectant solution. Certain sterilization is performed by the sterilizing agent solution having an increased concentration. In addition, since the bactericide solution circulating in the circulation system passes through the strainer 541 and flows into the secondary region 543, the activity of the slightly acidic electrolyzed water may be impaired by contact with the deposits of the strainer 541. Since the unused bactericide solution supplied to the secondary region 543 comes into contact with the bacteria in a state having a sufficient bactericidal effect without coming into contact with the deposits on the strainer 541, reliable sterilization can be performed.

Then, the bactericide solution in the secondary region 543 is supplied to the spraying device 53 through the circulation system 55 by the circulation pump 551.
In this embodiment, since the relay tank 566 is provided between the generator 561 and the circulation tank 54, the generator 561 can be intermittently operated by storing slightly acidic electrolyzed water in the relay tank 566. Since the temperature of the generating device 561 can be suppressed by preventing overheating of the electrodes, ancillary equipment such as a cooling device becomes unnecessary.

  Further, since the relay tank 566 serves as a buffer, the difference between the supply capacity of the generation device 561 and the amount of spray water necessary for the implementation can be filled, and different generation amounts of spray water can be realized by one generation device 561. it can.

  Further, by having a dilution water system 571 capable of supplying tap water to the circulation tank 54 in addition to the relay tank 566, the ratio and amount of the slightly acidic electrolyzed water and tap water that is the stock solution of the bactericide solution supplied to the circulation tank 54 Can be set arbitrarily. For this reason, operation conditions and processing performance can be arbitrarily set according to air conditions and a user's demand level. For example, since the residence time of the disinfectant solution in the circulation tank 54 can be changed, the disinfection ability and the gas removal ability can be arbitrarily set.

  The relay tank 566 is provided with a deaeration line 566a communicating with the outside of the air cleaning device, so that the inside of the device can be prevented from becoming a chlorine atmosphere, and corrosion inside the device due to chlorine can be suppressed.

  Further, in the air cleaning device of the present embodiment, the circulation time h until the sterilizer solution sprayed from the spray nozzle 531 is sprayed again by the spray device 53 through the circulation tank 54 and the circulation system 55 is the sterilizer solution. The necessary contact time required for sterilization with the existing hypochlorous acid (HCLO), which is 1.5 minutes or longer here, is satisfied, and it is possible to reliably sterilize the bacteria captured by gas-liquid contact.

This circulation time h is defined by the following equation.
Capacity of circulating tank 54 / Amount of circulating water (amount of sprayed water) = circulation time h> necessary contact time By sterilizing the captured bacteria in this manner, the bacteria will not re-scatter due to the spraying of the bactericide solution. Can supply air with higher safety.

  In addition, the slightly acidic electrolyzed water that is the stock solution of the bactericide solution has a high reaction speed (bactericidal speed), so that the time for which the bactericide solution stays in the circulation system can be shortened. As a result, the capacity of the circulation tank 54 can be reduced to save space.

  By disposing the medium 503, the bactericide solution sprayed with the medium 503 can be captured, and the contact efficiency between water and air can be further increased by the water film effect of the bactericide solution flowing down the medium 503. For this reason, even if the ratio L / G of the weight L of the bactericide solution to the weight G of the sterilization target air 51 is 0.3 or less, the saturation efficiency can be 80% or more, and the removal efficiency of floating bacteria and dust can be improved. Can be increased. However, the medium 503 is not essential in the present invention. In addition, even if the amount of liquid retained is low, it may be anything as long as it has a function of separating moisture contained in the air. For example, a net having a low porosity or a plurality of plates arranged in parallel may be used.

Dust accumulated in the circulation tank 54 is discharged outside the apparatus by opening the drain valve 544 of the drain system 545 when the apparatus is stopped or at regular intervals.
(Example)
Hereinafter, examples showing the effectiveness of the present invention will be described. FIG. 5 shows the relationship between the effective chlorine concentration and the time required to sterilize 99% of coliforms. In FIG. 5, the slightly acidic electrolyzed water mainly composed of hypochlorous acid (HCLO) can achieve 99% sterilization in 1.5 minutes at an effective chlorine concentration of 0.1 mg / L. However, electrolytic hypochlorous acid based on hypochlorite ions (CLO-) takes 120 minutes to achieve 99% sterilization at an effective chlorine concentration of 0.1 mg / L.

Below, the design example of an air purifying apparatus is demonstrated.
As design conditions, the air volume is 10,000 m3 / h, the L / G is 0.15, the circulating water volume is 30 L / min, and the effective chlorine concentration is 0.1 mg / L.

  In the case of slightly acidic electrolyzed water (HCLO is the main component), the required residence time (circulation time): 1.5 minutes / 1 cycle, the circulation tank capacity: 51 L, and the tank size (effective) 400 W × 850 W × 150 Hmm.

  In the case of electrolytic hyponitrous acid (CLO- as the main component), the required residence time (circulation time): 120 minutes / cycle, circulation tank capacity: 3,120 L, and tank size (effective) 1200 W × 2600 W × 150 Hmm.

Therefore, the use of slightly acidic electrolyzed water can realize a significant downsizing of the apparatus.
In the present embodiment, the example in which the slightly acidic electrolyzed water in the relay tank 566 is supplied to the circulation tank 54 by the relay pump 569 has been described. However, as shown in FIG. An appropriate amount of slightly acidic electrolyzed water can be dropped into the circulation tank 54 at 578. In this case, the power of the pump becomes unnecessary.

  In addition, as shown in FIG. 3A, it is also possible to inject slightly acidic electrolyzed water by a relay pump 569 downstream of the circulation pump 551 of the circulation system 55 and supply it to the circulation tank 54. Further, as shown in FIG. 3B, it is also possible to blow the slightly acidic electrolyzed water into the circulation tank 54 by using an ejector on the upstream side of the circulation pump 551 of the circulation system 55. In this case, the medicine supply device 56 forms an unused liquid region having a high concentration of the bactericide solution in the circulation system 55.

  In addition, as shown in FIG. 4, slightly acidic electrolyzed water can be blown directly downstream of the spray nozzle 531 and supplied to the circulation tank 54. In this case, the medicine supply device 56 is an unused disinfectant solution that is directly blown into the air passage 52 separately from the spray device 53, and an unused liquid region is formed in the air passage 52, so that it is sufficiently used to have a sterilizing effect. Since the sterilizer solution directly contacts the air and the medium 503, the sterilization can be surely performed.

  Moreover, as shown in FIG. 7, the dilution water from the dilution water system 571 is supplied to the downstream side (the connection side of the circulation pump 551) with respect to the flow direction of the bactericide solution in the circulation tank 54, and the dilution water supply position. It is also possible to supply the stock solution of the bactericide solution from the medicine supply device 56 to the upstream side (media 503 side).

In this case, since an unused liquid region having a high concentration of the bactericide solution is formed on the upstream side of the circulation tank 54 into which the stock solution of the bactericide solution flows, the sterilization effect in the circulation tank 54 can be enhanced.
The disinfectant solution flowing in the circulation tank 54 is diluted on the downstream side, and the disinfectant solution having a reduced concentration is sprayed from the spray device 53. The spray water sprayed from the spraying device 53 descends from the air passage 52 or flows through the medium 503 and flows into the circulation tank 54 again.

  Airborne bacteria and dust contained in the air are captured by spray water or a water film formed on the medium 503, flow into the circulation tank 54 together with the spray water, and a stock solution of the bactericide solution is supplied in the circulation tank 54. Since it passes through the unused liquid area where the concentration of the bactericidal solution formed at the position is high or the area where the bactericidal power flowing from there is high, the bacteria captured by the gas-liquid contact with the spray water is surely ensured before spraying. Sterilized. Therefore, the trapped bacteria are not scattered again with the spray of the bactericide solution, and air with higher safety can be supplied.

  Moreover, since it sprays in the state where the density | concentration of the bactericidal agent solution was diluted, generation | occurrence | production of the bactericidal component and generation | occurrence | production of an odor can be suppressed. Since the concentration of the disinfectant solution in the spray water is low, the disinfection effect in the air is reduced, but airborne bacteria and dust in the air are trapped by the spray water that has been brought close to saturation by the spray and the medium 503. Since it can be made to flow into the circulation tank 54 together with the spray water, it can be surely sterilized in the circulation tank 54. Furthermore, since the spray amount can be increased, the sterilization effect and dust removal effect by spraying can be enhanced.

  The position for supplying the stock solution of the bactericide solution is to contact the cells that have flowed into the circulation tank 54 with the unused bactericide solution as soon as possible, and to increase the contact time, near the lower side of the medium 503 or upstream thereof. The side is preferred. Thereafter, the sterilizing agent solution flows through the circulation tank 54 over time, so that it can be sprayed after the sterilizing power is restored.

In this embodiment, the dilution water system 571 is configured to supply dilution water to the circulation tank 54. However, the dilution water is supplied to the circulation system circulation system 55 that supplies the bactericide solution in the circulation tank 54 to the spraying device 53. It may be configured to.
(Other examples)
In the above embodiment, the medium is disposed on the downstream side of the spraying device, but the medium may be disposed on the upstream side of the spraying device, and the spraying device may spray the spray water so as to reach the upstream medium. . Further, the ventilation path may be formed in the vertical direction, and the spraying device and the medium may be arranged in the vertical direction in the ventilation path.

  In each of the above embodiments, slightly acidic electrolyzed water is used as an example of a stock solution for sterilization, but is not limited to slightly acidic electrolyzed water. Electrolyzed water or dilute sodium hypochlorite solution, ozone water, chlorine dioxide water or the like may be used.

50 Housing 51 Air to be sterilized 52 Ventilation path 53 Spraying device 54 Circulation tank 55 Circulation system 56 Drug supply device 501 Prefilter 502 Eliminator 503 Media 504 Mist separator 505 Medium performance filter 531 Spray nozzle 541 Strainer 542 Primary region 543 Secondary region 544 Drain valve 545 Drain system 546 Overflow pipe 551 Circulation pump 561 Generator 562 Chemical carry-in container 563a Open / close valve 563 Raw material supply system 564 Pressure reducing valve 565 Water supply system 566 Relay tank 567 Supply pump 568 Drug supply system 569 Relay pump 570 Relay system 571 572 Dilution water control valve 573 Flow rate adjustment valve 574 Dilution water initial water supply system 575 Initial water supply control valve 576 Drug initial supply system 577 Drug control valve

Claims (8)

A housing having an air passage through which the air to be sterilized flows from the upstream side to the downstream side, a spraying device for spraying a sterilizing agent solution onto the air to be sterilized flowing through the air passage, and the sterilizing agent solution descending from the air passage are received. A circulation tank, a circulation system for supplying the germicidal solution of the circulation tank to the spraying device, a drug supply device for supplying a stock solution of the germicidal solution, and a dilution water system for supplying dilution water for diluting the germicidal solution
The supply position of the stock solution of the bactericide solution supplied by the drug supply device and the supply position of the dilution water supplied by the dilution water system in the circulation system of the bactericide solution circulating around the spraying device, the housing air passage, the circulation tank and the circulation system By using different positions, an unused liquid region with a high concentration of the bactericidal solution is formed at the inflow site of the circulating system where the stock solution of the bactericidal solution flows, and the cells taken into the circulating system are sprayed before spraying. An air cleaning device characterized in that it is sterilized.   The circulation tank has a strainer that divides the interior into a primary area upstream and a secondary area downstream of the circulation system, the dilution water system is connected to the primary area, and the drug supply device is connected to the secondary area where the circulation system communicates. The air purifier according to claim 1, wherein the air cleaner is connected to form an unused liquid region in the secondary region.   The air purifier according to claim 1, wherein the medicine supply device is connected to a circulation system to form an unused liquid region in the circulation system.   The drug supply device is connected to an air passage on the downstream side of the spray device, and is an unused disinfectant solution directly blown into the air passage separately from the spray device, and forms an unused liquid region in the air passage. The air purifier according to claim 1. The dilution water system supplies the dilution water to the circulation tank or circulation system, and the chemical supply device forms an unused area at a position upstream of the dilution water supply position in the flow direction of the bactericide solution in the circulation tank. ,
2. The air cleaning device according to claim 1, wherein the spraying device sprays the disinfectant solution which has been diluted with dilution water to have a low concentration.   Disposed in the air passage across the air stream of the air to be sterilized, with a medium that captures the disinfectant solution sprayed from the spray device, the circulation tank is disinfecting from the air path and the disinfectant falling from the medium The air cleaner according to any one of claims 1 to 5, wherein the agent solution is received.   The spraying device includes a medium having a high liquid holding amount, and the spraying device is configured so that the ratio L / G of the weight L of the bactericide solution to the weight G of the sterilization target air in the atmosphere in the ventilation channel satisfies 0.3 or less. The air purifier according to claim 6, wherein a bactericidal agent solution is sprayed on the air to be sterilized. 8. The air cleaning device according to claim 1, wherein slightly acidic electrolyzed water is used as a stock solution of the bactericide solution.

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