JP2011104408A - Air disinfecting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air disinfecting apparatus which permits scale contained in electrolytic water to be easily known before it adheres to an air-liquid contact member. <P>SOLUTION: The air disinfecting apparatus includes a mechanism feeding air in a room to the air-liquid contact member into which electrolytic water obtained by electrolyzing water containing chlorine ions is dropped or infiltrated and diffusing air brought into contact with the electrolytic water into the room and has an internal disinfection mode in which the electrolyzation of the electrolytic water is started to prevent water quality from deteriorating when the stopping time of the electrolyzation is longer than prescribed time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air sterilization apparatus capable of removing airborne microbial viruses and the like.

In general, for the purpose of removing airborne microbial viruses, etc., a sterilization device has been proposed in which electrolyzed water mist is diffused in the air and this electrolyzed water mist is brought into direct contact with airborne microorganisms to inactivate viruses. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 2002-181358

  However, in the sterilization apparatus described above, it is effective in a use environment where fine particulate electrolyzed water mist easily reaches, that is, in a use environment where electrolyzed water mist is difficult to reach while being effective in a relatively small space, that is, a large space. For example, there is a problem that it is difficult to exert its effect in kindergartens, elementary / middle / high schools, nursing care insurance facilities, hospitals, and the like.

On the other hand, electrolyzed water obtained by electrolyzing water containing chlorine ions was dropped or infiltrated into the gas-liquid contact member, indoor air was sent to the gas-liquid contact member, and contacted with the electrolyzed water. The thing provided with the mechanism which blows off air indoors is proposed.
In this case, when scale is generated in the electrolyzed water and the scale is deposited on the gas-liquid contact member, there is a problem that removal of the scale becomes troublesome.
Therefore, the object of the present invention is to eliminate the above-described problems of the conventional technology, and to easily know the scale contained in the electrolyzed water before it adheres to the gas-liquid contact member. Is to provide.

The present invention provides a mechanism for sending room air to a gas-liquid contact member in which electrolyzed water obtained by electrolyzing water containing chlorine ions is dropped or infiltrated, and blowing out the air in contact with the electrolyzed water into the room. In order to prevent deterioration of water quality when the electrolysis stop time is longer than a predetermined time, an internal sterilization mode for starting electrolysis of the electrolyzed water is provided.

In this case, when the operation switch is turned on after the operation in the internal sterilization mode is executed, the normal operation is performed and the electrolysis water conductivity and the electrolysis stop time are changed during the stop time. In order to compensate for the active oxygen species having a reduced residual concentration, an operation start-up mode for performing electrolysis may be provided.

  In the present invention, since there is provided a predicting means for judging the contamination of the electrolyzed water and predicting the scale adhesion to the gas-liquid contact member, the scale contained in the electrolyzed water is removed before adhering to the gas-liquid contact member. Easy to know.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, the code | symbol 1 shows a floor-standing type air sanitizer. This floor-mounted air sterilization apparatus 1 includes a box-shaped housing 2, which includes a leg piece 2A, a front panel 2B, and a top panel 2C, on both sides of the top panel 2C. The operation lid 2D and the opening / closing lid 2E are arranged side by side. As shown in FIG. 2, a horizontally long suction port 3 is formed in the lower portion of the housing 2, and a prefilter 3 </ b> A is disposed above the suction port 3. A blower fan 7 is disposed above the pre-filter 3A, and a gas-liquid contact member 5 having high water retention is disposed above the blower fan 7 in a brace shape as shown in FIG. A horizontally long air outlet 4 is disposed above the liquid contact member 5. Reference numeral 8 denotes a support plate for the blower fan 7, and the support plate 8 is supported by the housing 2.

  This gas-liquid contact member 5 is a filter member having a honeycomb structure, has a structure in which a wide gas contact area is ensured, electrolytic water can be dripped, and clogging is difficult. That is, as shown in FIG. 4, the gas-liquid contact member 5 is formed in a honeycomb shape as a whole by joining a material 5A bent into a wave shape and a flat material 5B.

  These materials 5A and 5B include materials that are less reactive to electrolyzed water, which will be described later, in short, materials that are less susceptible to degradation by electrolyzed water, such as polyolefin resins (polyethylene resins, polypropylene resins, etc.), PET (polyethylene terephthalate) resins. A material such as a vinyl chloride resin, a fluorine resin (PTFE, PFA, ETFE, etc.) or a ceramic material is used. In this configuration, a PET resin is used for these materials 5A and 5B. Moreover, since electrolyzed water having fungicidal action is dropped on the gas-liquid contact member 5, it is not necessary to apply a fungicide to the gas-liquid contact member 5 as a countermeasure against mold.

  The inclination angle θ of the gas-liquid contact member 5 is desirably 30 ° or more. In the case of less than that, the dropped electrolyzed water does not flow along the inclination of the gas-liquid contact member 5 but falls downward. Further, when the inclination angle θ approaches 90 °, the air blowing path passing through the gas-liquid contact member 5 becomes nearly horizontal, and it is difficult to blow upward by that much. When this blowing direction is made close to horizontal, the blowing air cannot be blown far away, and as described later, the device is not suitable for sterilization of a large space. The inclination angle θ is preferably 80 °> θ> 30 °, more preferably 75 °> θ> 55 °, and about 57 ° in this configuration.

5A to 5C show electrolyzed water supply means for dropping electrolyzed water onto the gas-liquid contact member 5.
A water tray 9 (see FIG. 3) is disposed below the gas-liquid contact member 5 made of PET resin, and a water tank support tray 10 is connected to the water tray 9. The water supply tank support tray 10 is provided with a water supply tank 11 for supplying tap water containing chlorine ions into the support tray 10 and a circulation pump 13. An electrolytic tank 31 is connected to the circulation pump 13, and an electrolytic water supply pipe 17 is connected to the electrolytic tank 31. The electrolyzed water supply pipe 17 is configured to include a large number of water spray holes (not shown) on the outer periphery, and as shown in FIG. 5B, in the water spray box 5C formed at the upper edge of the gas-liquid contact member 5. Has been inserted.

  As shown in FIG. 5C, the electrolytic cell 31 includes electrodes 32 and 33. When the electrodes 32 and 33 are energized, the tap water flowing into the electrolytic cell 31 is electrolyzed to generate active oxygen species. Let Here, the reactive oxygen species are oxygen having higher oxidation activity than normal oxygen and related substances, such as superoxide anion, singlet oxygen, hydroxyl radical, or hydrogen peroxide, in a narrow sense. It is assumed that active oxygen includes active oxygen in a broad sense such as ozone and hypohalogen acid. The electrolytic cell 31 is arranged close to the gas-liquid contact member 5 and is configured to be able to immediately supply the active oxygen species generated by electrolyzing tap water to the gas-liquid contact member 5.

The electrodes 32 and 33 are, for example, electrode plates in which the base is made of Ti (titanium) and the coating layer is made of Ir (iridium) or Pt (platinum). The current value applied to the electrodes 32 and 33 is the current density. A predetermined free residual chlorine concentration (for example, 1 mg (milligram) / l (liter)) is generated as several mA (milliampere) / cm ² (square centimeter) to several tens of mA / cm ² .

When the tap water is energized by the electrodes 32 and 33, the cathode electrode
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
And the anode electrode
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
As soon as the reaction of
Chlorine ions contained in water (pre-added to tap water)
2Cl ⁻ → Cl ₂ + 2e ⁻
In addition, this Cl ₂ reacts with water,
Cl ₂ + H ₂ O → HClO + HCl
It becomes.

  In this configuration, when the electrodes 32 and 33 are energized, HClO (hypochlorous acid) having a high sterilizing power is generated, and air is passed through the gas-liquid contact member 5 to which this hypochlorous acid is supplied. The gas-liquid contact member 5 can prevent germs from breeding, and can inactivate viruses floating in the air passing through the gas-liquid contact member 5. Further, when the odor passes through the gas-liquid contact member 5, it reacts with hypochlorous acid in the electrolytic water, and is ionized and dissolved to be removed from the air and deodorized.

Next, the operation of this embodiment will be described.
In FIG. 1, when the operation lid 2D is opened, an operation panel (not shown) is provided on the inner side, and the operation of the floor-standing air sterilizer 1 is started by operating this operation panel. When this operation is started, the circulation pump 13 is driven with reference to FIG. 6, and the tap water accumulated in the water supply tank support tray 10 is supplied to the electrolytic cell 31.
In the electrolytic bath 31, when the electrodes 32 and 33 are energized, tap water is electrolyzed to generate electrolytic water containing active oxygen species. This electrolyzed water is sprinkled into the watering box 5C through a watering hole (not shown) of the electrolyzed water supply pipe 17, and from here it soaks into the upper edge of the gas-liquid contact member 5 and gradually toward the lower part. To penetrate.

  The surplus electrolyzed water is collected in the water tray 9 and flows into the adjacent water supply tank support tray 10 where it is stored. In this configuration, when water is circulated and the amount of water is reduced by evaporation or the like, an appropriate amount of tap water is supplied to the water supply tank support tray 10 via the water supply tank 11. When the amount of water in the water supply tank 11 decreases, the open / close lid 2E (see FIG. 1) is opened, the water supply tank 11 is taken out, and tap water is supplied.

  The air-liquid contact member 5 that has permeated with the electrolyzed water is supplied with indoor air as shown by an arrow X through the blower fan 7. The indoor air comes into contact with the active oxygen species soaked in the gas-liquid contact member 5 and is blown out into the room again. This reactive oxygen species has the function of destroying and eliminating (removing) the surface protein (spike) of the virus essential for infection when, for example, influenza virus floats in the indoor air. Influenza virus and the receptor (receptor) necessary for the virus to become infected do not bind, thereby preventing infection. As a result of the verification test, it was found that 99% or more of the virus can be removed when the air in which the influenza virus is suspended is passed through the gas-liquid contact member 5 having this configuration.

Next, a predicting unit that determines the contamination of the electrolyzed water and predicts the adhesion of the scale to the gas-liquid contact member 5 will be described. In the electrolyzed water obtained by electrolyzing tap water, the caustic substances such as calcium and magnesium in the tap water are concentrated to increase the conductivity of the electrolyzed water.
This prediction means detects the electrical conductivity of the electrolyzed water in the electrolytic cell 31 using the electrodes 32 and 33 shown in FIG. 5C. When the electrical conductivity exceeds a predetermined value, the LED lamp (notification means) attached to the operation panel (not shown) exposed after opening the operation lid 2D in FIG. 1 is turned on.

The electrolytic cell 31, the circulation pump 13, and the blower fan 7 in this embodiment are controlled by the control unit 30 (see FIG. 5A).
FIG. 7 is a flowchart including a prediction operation in which the control unit 30 predicts the adhesion of the scale to the gas-liquid contact member 5.
First, when the power supply is connected to the present apparatus, the timer count T counted since the previous operation stop is reset, and the water exchange flag is turned off (step Sa1). This water exchange flag is used to determine whether or not to shift to a saucer water exchange mode for exchanging electrolytic water or tap water accumulated in the water supply tank support tray 10.

  Next, in order to determine whether or not to shift to the receiving water exchange mode, it is determined whether or not the water exchange flag is off (step Sa2). Here, if it is determined that the water exchange flag is not off (step Sa2: no), the operation proceeds to a tray water exchange mode to be described later.

On the other hand, if it is determined that the water exchange flag is off (step Sa2: yes), the timer count T is started (step Sa5), and then the timer count T is estimated to have decreased the sterilization performance of the electrolyzed water. It is determined whether or not the predetermined time t is exceeded (step Sa6). If it is determined that the timer count T exceeds the predetermined time t (step Sa6: yes), the process proceeds to an internal sterilization mode in which the electrolyzed water is sterilized (step Sa7).
Here, in the internal sterilization mode, when the state where the electrolysis is stopped is continued for a long time, the sterilization performance is reduced due to consumption of hypochlorous acid in the electrolyzed water in the apparatus by electrolysis. In addition, this is an operation mode that prevents deterioration of water quality due to growth of bacteria and the like. In the internal sterilization mode, water in the apparatus is electrolyzed every time a predetermined time t elapses to generate hypochlorous acid. FIG. 8 is a flowchart showing the operation of the internal sterilization mode.

First, when the mode is changed to the internal sterilization mode, the circulation pump 13 is controlled to be turned on, and the operation of the circulation pump 13 is started (step Sb1), and an electrolysis operation described later is started (step Sb2).
When the electrolysis operation is finished, the circulation pump 13 is controlled to be turned off, the operation of the circulation pump 13 is finished (step Sb3), the count value of the timer count T is reset (step Sb4), and then the internal sterilization mode is set. And the timer count T is started as shown in FIG. 7 (step Sa8).

On the other hand, in step Sa6, it is determined that the operation stop time T does not exceed the predetermined time t (step Sa6: no), or when the internal sterilization mode (step Sa7) ends and the count of the timer count T starts ( In step Sa8, the user waits for a driving instruction by operating the operation switch (SW) on the operation panel (step Sa9).
When the user operates the operation switch to start the operation of the floor-type air sterilizer 1 (step Sa9: yes), after the previous operation is stopped or the internal sterilization mode is ended, During the operation stop time T until the operation is started, hypochlorous acid whose residual concentration has decreased is compensated, and the operation shifts to an operation start-up mode including a prediction operation for predicting scale adhesion (step Sa10).

FIG. 9 is a flowchart showing an operation process of the control unit 30 in the operation start-up mode.
First, the circulating pump 13 and the blower fan 7 are driven, and electrolytic water or tap water (hereinafter, unified with electrolytic water) accumulated in the water supply tank support tray 10 is supplied to the electrolytic bath 31 (step Sc1).
Next, the operation proceeds to electrolysis (step Sc2), and the following processing is performed.

FIG. 10 is a flowchart showing an operation process of the control unit 30 in the electrolytic operation.
If it transfers to electrolysis operation, it will transfer to the electrical conductivity measurement mode which measures the electrical conductivity of electrolyzed water first, and will detect the electrical conductivity of the electrolyzed water in the electrolytic vessel 31 using the electrodes 32 and 33 (FIG. 5) ( Step Sd1).

  In detail about the conductivity measurement mode (step Sd1), as shown in the flowchart of FIG. 11, first, an alternating voltage is applied between the electrodes 32 and 33 of the electrolytic cell 31, and the electrolysis interposed between the electrodes 32 and 33 is performed. The AC resistance value (Ω) of water is measured (step Se1). Next, the conductivity of the electrolyzed water is obtained from the measured AC resistance value (Ω) (step Se2), and the conductivity measurement mode is completed.

In the present embodiment, the electric conductivity value of the electrolyzed water indicating immediately before the scale is attached is set as the threshold value α and is obtained in advance through experiments or the like. That is, by determining using this threshold value α, it is possible to easily know whether or not the scale is in a state immediately before adhering to the gas-liquid contact member 5.
When conductivity is detected in the conductivity measurement mode, as shown in FIG. 10, water exchange is not necessary by determining the contamination of the electrolyzed water according to whether the detected conductivity exceeds the threshold value α. Is determined (step Sd2).

  As a result of the electrical conductivity measurement in step Sd1, if the electrical conductivity exceeds the threshold value α and it is determined that water exchange is necessary (step Sd2: no), the scale becomes a gas-liquid contact member when the electrolytic water becomes dirty as it is. 5 is expected to adhere. For this reason, in order to prevent this, in step Sa2 (FIG. 7), the saucer water exchange flag for shifting to the saucer water exchange mode is turned on (step Sd10).

  On the other hand, as a result of the conductivity measurement in step Sd1, if the conductivity does not exceed the threshold value α and it is determined that water exchange is not necessary (step Sd2: yes), the scale adheres to the gas-liquid contact member 5 It is estimated that

In order to make hypochlorous acid contained in the electrolyzed water a predetermined target concentration (required concentration) that can inactivate viruses floating in the air passing through the gas-liquid contact member 5, this target concentration is used. The electrolysis current and electrolysis time are calculated from the residual concentration of hypochlorous acid and the conductivity of the electrolyzed water, the electrolysis conditions are determined based on the calculation results, and the electrolyzed water is electrolyzed based on the electrolysis conditions. There must be. At this time, the electrolysis time is calculated on the basis of the stop time (timer count T) from the previous electrolysis stop (step Sa7 or step Sa13) and data obtained in advance through experiments or the like from the measured conductivity ( Step Sd3).
Here, if the residual concentration of hypochlorous acid after the previous operation of the floor-standing air sanitizer 1 is stopped, excessive hypochlorous acid may be generated when the operation is resumed. Since the residual concentration of hypochlorous acid decreases with time, the residual concentration is high when the operation stop time (timer count T) is short, and the residual concentration is low when the operation stop time (timer count T) is long. For this reason, the residual concentration (active oxygen species concentration) of hypochlorous acid in electrolyzed water can be estimated from the operation stop time (timer count T) after the operation is stopped. Therefore, in the operation start-up mode, the electrolysis current and electrolysis time corresponding to the timer count T and the conductivity are calculated, and electrolysis is performed so that generation of hypochlorous acid is not excessive.

When the electrolysis conditions are set based on the electrolysis current and electrolysis time calculated in step Sd3, energization to the electrodes starts according to the set electrolysis conditions, and a current based on the electrolysis conditions set between the electrodes 32 and 33 flows. (Step Sd4), hypochlorous acid corresponding to the current is generated.
The electrolysis continues until the actual energization amount due to electrolysis reaches the energization amount (electrolysis current × electrolysis time) A set in step Sd3, thereby generating hypochlorous acid having a necessary concentration ( Step Sd7). On the other hand, if it is determined in step Sd7 that the energization amount by actual electrolysis has reached the calculated energization amount A, the energization between the electrodes 32 and 33 is stopped (step Sd8), and the timer count T is reset (step Sd7). Sd9) to finish the electrolysis operation.

Tap water contains calcium, magnesium, etc. When electrolysis is performed, these components accumulate as scales on the electrode (cathode) and electrical conductivity decreases, making continuous electrolysis difficult. .
In this case, it is effective to reverse the polarity of the electrode (switch between positive and negative of the electrode). By electrolysis using the cathode electrode as the anode electrode, the scale deposited on the cathode electrode can be removed. This switching control can be switched periodically by accumulating electrolysis energization time with a timer.

In the present embodiment, this switching control is performed during energization of the electrodes 32 and 33 (steps Sd4 to Sd7), and whether or not the energization time based on the set electrolysis conditions has elapsed, It is determined whether or not energization polarity switching is required (step Sd5). At this time, if it is determined that energization polarity switching is necessary (step Sd5: no), energization switching is performed (step Sd6). In step Sd7, the actual energization amount by electrolysis reaches the calculated energization amount A. The electrodes 32 and 33 are energized until determined.
When the electrolysis operation ends, the operation start-up mode ends (FIG. 9), and as shown in the flowchart of FIG. 7, a prediction operation for predicting scale adhesion when the floor-standing air sterilizer 1 is in steady operation. (Step Sa11).

FIG. 12 is a flowchart showing an operation process of the control unit 30 in the steady operation mode.
When shifting to the steady operation mode, first, the circulating pump 13 and the blower fan 7 are driven, and the electrolyzed water accumulated in the water supply tank support tray 10 is supplied to the electrolytic cell 31 (step Sf1).
Next, the electrolysis water is judged to be dirty, and in order to predict the adhesion of the scale to the gas-liquid contact member 5, the electrolysis operation (FIG. 10) is performed, and the electrolysis operation process described above is performed. Here, in the electrolysis operation process in the operation start-up mode, when the energization amount is calculated in step Sd3 (FIG. 10), the electrolysis conditions are calculated based on the value of the timer count T and the conductivity. Since the operation mode is an operation mode in which the reduced hypochlorous acid is replenished while the floor-type air sanitizer 1 is in operation, the electrolysis conditions are calculated based only on the conductivity in the steady operation mode.

The steady operation mode is repeatedly performed until an operation stop instruction is issued by operating the operation switch (SW) (step Sa12).
At this time, when the user operates the operation switch to stop the operation of the floor-type air sterilizer 1 (step Sa12: yes), the circulation pump 13 and the blower fan 7 are stopped and the timer count T is set. Reset (step Sa13).
And it returns to determination whether a water exchange flag is off (step Sa2), and the process from step Sa2 is performed again. Here, when it is determined that the water exchange flag is on in step Sa2 (step Sa2: no) due to the fact that the saucer water exchange flag is turned on in step Sd10 (FIG. 10), the operation proceeds to the saucer water exchange mode. (Step Sa3).

In this tray water exchange mode, in order to notify (alarm) the exchange of the electrolyzed water accumulated in the water tank support tray 10 to the user, an indication that the water is dirty (or prompts for the water exchange) is operated. This is done by turning on an LED lamp (notification means) attached to the panel. When the replacement of the electrolyzed water is notified, the operation of the electrolyzer 31, the blower fan 7, and the circulation pump 13 is stopped (step Sa4).
At this time, for example, the user pulls out the water supply tank support tray 10, discards the electrolyzed water accumulated therein, replaces it with a new one, operates the operation panel, and operates the floor-standing air sanitizer 1. When started, the processing from step Sa1 is started. Since the electrolyzed water is not contaminated immediately after the electrolyzed water is exchanged, the water exchange is not necessary in the water exchange determination in step Sd2 (FIG. 10) because the measured conductivity does not exceed the threshold value α. (Step Sd2: Yes).

  As described above, according to the present embodiment, since the contamination of the electrolyzed water is determined and the scale adhesion to the gas-liquid contact member 5 is predicted, the scale contained in the electrolyzed water is in contact with the gas-liquid contact. Before adhering to the member 5, it can be known easily, and scale adhesion to the gas-liquid contact member 5 can be prevented beforehand.

As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this. For example, ozone (O ₃ ) or hydrogen peroxide (H ₂ O ₂ ) may be generated as the active oxygen species. In this case, when a platinum tantalum electrode is used as an electrode, active oxygen species can be stably generated with high efficiency by electrolysis from water having a small ion species.
At this time, in the anode electrode,
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
At the same time as
3H ₂ O → O ₃ + 6H ⁺ + 6e ⁻
2H ₂ O → O ₃ + 4H ⁺ + 4e ⁻
This reaction occurs and ozone (O ₃ ) is generated. In the cathode electrode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
O ₂ ⁻ + e ⁻ + 2H ⁺ → H ₂ O ₂
As in, O ₂ by the electrode reaction ^- O which is produced ₂ ^- and solution H ⁺ and are bonded in the hydrogen peroxide (H ₂ O ₂₎ is generated.

In this construction, by supplying current to the electrodes, a large ozone sterilizing power (O ₃₎ and hydrogen peroxide (H ₂ O ₂₎ is generated, these ozone (O ₃₎ and hydrogen peroxide (H ₂ O ₂₎ Electrolyzed water containing can be made. The concentration of ozone or hydrogen peroxide in the electrolyzed water is adjusted to a concentration that inactivates the target virus and the like, and air is passed through the gas-liquid contact member 5 supplied with the electrolyzed water of this concentration. It is possible to inactivate floating target viruses and the like. Further, when the odor passes through the gas-liquid contact member 5, it reacts with ozone or hydrogen peroxide in the electrolytic water, and is ionized and dissolved to be removed from the air and deodorized.

  In the above embodiment, in order to reverse the polarity of the electrode, it is periodically reversed using a timer. However, the present invention is not limited to this, and the polarity is reversed irregularly such as reversed every time the operation is started. You may let them. Further, an increase in electrolytic resistance (decrease in electrolysis current or increase in electrolysis voltage) may be detected, and the polarity may be reversed based on this result.

  In the above embodiment, when the electrodes 32 and 33 of the electrolytic cell 31 are not electrolyzed, the conductivity of the electrolyzed water in the electrolytic cell 31 is detected using the electrodes 32 and 33. However, the present invention is not limited to this. Alternatively, a conductivity may be detected by newly providing an electrode in addition to the electrodes 32 and 33 of the electrolytic bath 31. In this case, the newly provided electrode is preferably provided in the water supply tank support tray 10.

  In the above embodiment, the electrolyzed water contamination is determined by detecting the electrolyzed water conductivity. However, the present invention is not limited to this, and if the electrolyzed water contamination can be determined, the transmittance of the electrolyzed water is detected by an optical sensor. Alternatively, the specific gravity of the electrolyzed water may be detected.

  In the above-described embodiment, the water replacement time is performed by turning on the LED lamp (notification means) attached to the operation panel. However, the present invention is not limited to this, and other lamps, sounds such as melodies are emitted. It may be done by.

  In the above embodiment, the water supply system using the water supply / removal tank 11 that can be freely taken in and out is used. However, instead of the water supply tank 11, for example, a water pipe supply system that directly connects city water by connecting a water pipe may be used. Nor.

  Although the electrolyzed water dropping means to the gas-liquid contact member 5 has been described in the above embodiment, the present invention is not limited to this, and electrolyzed water may be permeated into the gas-liquid contact member 5. In this case, although not shown in the figure, for example, the electrolyzed water may be retained in the water receiving tray 9 and the lower edge portion of the gas-liquid contact member 5 may be submerged therein to suck up the electrolyzed water by a so-called capillary phenomenon.

  In the said embodiment, although the operation switch is in the off state, the operation mode is shifted to the tray water exchange mode. However, the present invention is not limited to this. For example, even when the operation switch is in the on state, It is possible to stop and to shift to the tray water exchange mode.

It is a perspective view which shows one Embodiment of this invention. It is a perspective view which shows an internal structure. It is a longitudinal cross-sectional view of a housing | casing. It is a front view of a gas-liquid contact member. It is a systematic diagram which shows the means to dripping electrolyzed water to a gas-liquid contact member, A is a side view, B is sectional drawing of a watering box, C is a block diagram of an electrolytic cell. It is explanatory drawing of air purification. It is a flowchart which shows the prediction operation | movement process which estimates adhesion of a scale. It is a flowchart which shows the operation | movement process in internal disinfection mode. It is a flowchart which shows the operation | movement process in driving | operation start-up mode. It is a flowchart which shows an electrolysis operation process. It is a flowchart which shows the measurement operation process in electrical conductivity measurement mode. It is a flowchart which shows the operation | movement process in steady operation mode.

5 Gas-liquid contact members 1 Floor-mounted air sanitizer (air sanitizer)
32, 33 electrodes

Claims (2)

A mechanism is provided that sends indoor air to a gas-liquid contact member in which electrolyzed water obtained by electrolyzing water containing chlorine ions is dropped or permeated, and blows out the air in contact with the electrolyzed water into the room. An air sterilization apparatus comprising an internal sterilization mode for starting electrolysis of the electrolyzed water in order to prevent deterioration of water quality when the decomposition stop time is longer than a predetermined time.   When the operation switch is turned on after the operation in the internal sterilization mode is executed, the residual concentration is reduced during the stop time according to the conductivity of electrolyzed water and the stop time of electrolysis before the normal operation. The air sterilizer according to claim 1, further comprising an operation start-up mode for performing electrolysis in order to compensate for the reduced active oxygen species.