JP2001129062A - Method and apparatus for disinfecting floor surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus safe to a human body, dispensing with the detoxifying treatment of a used disinfectant and capable of effectively disinfecting a floor surface. SOLUTION: In a floor surface disinfecting method, an ozone aqueous solution obtained by electrolyzing water to be electrolized is sprinkled over a floor surface while the concentration of ozone of the aqueous solution is held to 10 ppm or more. A floor surface disinfecting apparatus is equipped with a water tank housing water to be electrolyzed, an ozone aqueous solution making apparatus for electrolyzing water to be electrolyzed from the water tank to make an ozone aqueous solution, an ozone aqueous solution sprinkler for sprinkling the ozone aqueous solution and an ozone aqueous solution recovery device for recovering the sprinkled ozone aqueous solution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor disinfecting method and a floor disinfecting apparatus for disinfecting various floors such as floors in rooms and corridors.

[0002]

2. Description of the Related Art Conventionally, floor disinfection has been performed by directly spraying a disinfectant on the floor or by including it in a mop to clean the floor.
And so on. However, the use of the disinfectant may adhere to the human body during handling and use, and may have an adverse effect on the human body. In addition, many of the used disinfectants are still harmful to humans and organisms, so take measures such as chemical detoxification, incineration, and highly diluted water to abandon rivers. Is required, and the running cost of the disinfecting agent itself is also high.

[0003] The present inventor has taken the above-mentioned problems into consideration in the conventional floor disinfection using a disinfectant, and has focused on the fact that ozone has a disinfecting effect, and has therefore been able to disinfect the floor with an aqueous solution of ozone. Tried. The aqueous ozone solution can be easily obtained by aerating ozone gas against water. By the way, it was found that the aqueous ozone solution produced by this method exhibited a certain degree of sterilizing action, but generally had a weak sterilizing action and was insufficient for floor surface disinfection.

[0004] From the following research by the present inventors, the following a-
Ha's facts became clear. A. The ozone aqueous solution produced by the above-described violence method has a low ozone concentration of about 3 to 4 ppm, and thus has a bactericidal action against some bacteria such as Escherichia coli, staphylococci, and Pseudomonas aeruginosa. The bactericidal effect is poor for Bacillus subtilis that form sorghum, and consequently it is insufficient for floor disinfection. B. Ozone concentration of 15 to 30 ppm by electrolysis of water
(3) When the ozone aqueous solution with a high ozone concentration is left in the atmosphere, dissolved ozone gradually decomposes and the ozone concentration is compared. If it is used quickly, it will maintain a high ozone concentration and will have a sufficient bactericidal action against Bacillus subtilis, making it extremely useful for floor disinfection. In addition, the ozone aqueous solution is substantially harmless to the human body even at a high ozone concentration at the time of use, and since the ozone concentration gradually decreases over time, it can be used without any detoxification treatment in rivers and the like. It also has the convenience that can be abandoned.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been developed and completed based on the above-mentioned new findings, and the problem to be solved by the present invention is that the conventional disinfecting agent has Problems, that is, adverse effects when adhered to the human body, necessity of detoxification of used disinfecting agents, running costs of the disinfecting agents themselves, and the like can be eliminated, and the floor surface can be effectively disinfected. A new floor disinfection method and a floor disinfection device are provided.

[0006]

According to the present invention, there is provided a floor disinfection method comprising the steps of: (1) dissolving an ozone aqueous solution obtained by electrolyzing water to be electrolyzed while the aqueous solution maintains an ozone concentration of 10 ppm or more; Is to be sprayed. (2) In the above (1), the electrolyzed water is soft water having a water hardness of 20 degrees or less. (3) In the above (2), water discharged from the cathode side during electrolysis of electrolyzed water is reused as electrolyzed water. (4) In any one of the above (1) to (3), the floor surface on which the aqueous ozone solution is sprayed is substantially free of dust. Further, the floor surface disinfection device according to the present invention is: (5) a water tank containing electrolyzed water, an ozone aqueous solution manufacturing device for electrolyzing the electrolyzed water from the water tank to produce an ozone aqueous solution,
An ozone aqueous solution spraying device for spraying an ozone aqueous solution and an ozone aqueous solution collecting device for collecting the sprayed ozone aqueous solution are provided. (6) In the above (5), a water supply device for sending water discharged from the cathode side of the ozone aqueous solution producing apparatus to a water tank is provided. (7) In the above (5), a floor cleaning device is provided for cleaning the floor before the aqueous ozone solution is sprayed. (8) In the above (5), a drying device is provided for drying the floor surface that has been disinfected by spraying an ozone aqueous solution. (9) In the above (5), the ozone aqueous solution spraying apparatus includes a rotary brush for cleaning a floor surface and a device for supplying an ozone aqueous solution to the rotary brush.

[0007]

DETAILED DESCRIPTION OF THE INVENTION An aqueous ozone solution used as a disinfectant in the present invention can be easily prepared by a usual electrolysis method using water, especially by an electrolysis method using a solid electrolyte membrane such as an organic polymer electrolyte. Can be manufactured. That is, the water supplied between the electrodes is electrolyzed into hydroxyl ions and hydrogen ions, and oxygen molecules and a small amount of ozone molecules are generated from the hydroxyl ions on the anode side, and they are dissolved in water immediately after generation. So an ozone aqueous solution (hereinafter,
The aqueous ozone solution is sometimes referred to as anode water). On the other hand, on the side of the cathode, hydrogen molecules are generated from hydrogen ions.

The water to be subjected to electrolysis (hereinafter referred to as electrolyzed water) is not particularly limited, and water having various hardnesses such as tap water, rain water, well water, spring water and the like can be used. However, in the electrolysis method using a solid electrolyte membrane (hereinafter, SPE method), when hard water is used, Ca ions and the like generated in the electrolysis of the water to be electrolyzed inhibit the permeation of hydrogen ions through the solid electrolyte membrane. Therefore, the water to be electrolyzed when the SPE method is employed is preferably soft water having a hardness of 20 degrees or less, particularly 15 degrees or less. Examples of such soft water include water softened by passing tap water through a water softener such as an ion exchanger, and rainwater. When water discharged from the cathode side during electrolysis of the electrolyzed water (hereinafter referred to as “cathode water”) is reused as the electrolyzed water, there is no need to take measures for disposing of the cathodic water. There is also an advantage that the movable floor disinfection device is compact.

When the electrolyzed water is electrolyzed under a normal voltage application condition, a high-concentration ozone aqueous solution having an ozone concentration of about 15 to 30 ppm can be easily and continuously produced. The applied voltage required in this case includes a basic voltage (1.23 V) corresponding to the Gibbs free energy required for decomposing water molecules, an overvoltage depending on the type of electrode material, and an electric resistance between the positive and negative electrodes. The voltage considering R (R
The total voltage obtained by adding I) may be, for example, about 1.4 to 10 V.

The electrode material for forming the positive and negative electrodes is also a usual one, for example, Ni—Mo, Ni—Co, Ni—Fe, Ni
-Mo-Cd, NiSx, nickel alloys such as Raney nickel, platinum, and carbon-based materials such as conductive carbon and graphite may be used.

[0011] By the above-mentioned electrolysis, an ozone aqueous solution is discharged from the anode side. Therefore, in the following, the ozone aqueous solution may be referred to as anode water. When the ozone aqueous solution is left in the atmosphere, the dissolved ozone is gradually decomposed to lower the ozone concentration, and thus the sterilizing effect is reduced. Therefore, in the present invention, it is desirable to immediately spray the anode water (aqueous ozone solution) discharged from the anode side to the floor to be disinfected, but it is sufficient to spray it while maintaining the ozone concentration of 10 ppm or more. It has a germicidal effect. If dust, especially oxidizing dust, is present on the floor to be disinfected, they may consume ozone and reduce the sterilizing action of the ozone aqueous solution. Therefore, in the present invention, it is particularly preferable that the floor surface to be disinfected is kept substantially free of dust by a suction cleaner or other appropriate cleaning means before spraying the aqueous ozone solution.

Embodiment 1 FIG. 1 is a cross-sectional view illustrating an ozone aqueous solution manufacturing apparatus (hereinafter, a solution manufacturing apparatus) for manufacturing an ozone aqueous solution according to a first embodiment of the present invention. 1 is used for electrolysis of water by the SPE method, 101 is an electrolysis chamber, 102 is a solid electrolyte membrane, 103 is a flat anode, 1
04 is a flat cathode, 105 and 106 are power supply chambers, 107 is a DC power supply, 108 is a water supply pipe, 109 is a water supply chamber, and 110 and 111 are electrolysis chambers 10.
1 is a water supply port provided on the ceiling. Reference numerals 112 and 113 denote anode water and cathode water drain pipes, respectively. The electrolysis chamber 101 is divided into left and right parts by a solid electrolyte membrane 102 installed in a vertical direction substantially at the center of the chamber, and an anode 103 and a cathode 103 are provided on the left and right surfaces of the solid electrolyte membrane 102, respectively. 104 are in close contact with each other. The power supply chambers 105 and 106 are provided with a power supply (not shown) that is well-known in the SPE method. The anode 103 and the cathode 104 are placed outside the electrolysis chamber 101 via the power supply. The DC power supply 107 is connected to an anode terminal and a cathode terminal, respectively.

As a material for forming the solid electrolyte membrane 102,
For example, GE's electrolytic fluorine resin (trade name,
An organic polymer electrolyte such as Nafion) is used, and porous conductive carbon having excellent water permeability is used as a material for forming the anode 103 and the cathode 104. The thickness of the solid electrolyte membrane 102, that is, the distance between the positive and negative electrodes is, for example, 0.1 mm.
About 5 to 50 mm is appropriate.

In the equilibrium state of the electrolysis, the water supply pipe 1
08 and the water supply chamber 109,
06, the electrolyzed water is continuously supplied to the drain pipes 112, 1 and 1.
The anode water and the cathode water are discharged from 13 respectively. In the meantime, the above-described voltage is applied between the positive and negative electrodes 103 and 104, and a part of the electrolyzed water is porous.
3, 104, and migrates into the solid electrolyte membrane 102 where it is electrolyzed. As a result, ozone is generated at the anode 103, and the anode water has an ozone concentration of 15 to 30 ppm.
It becomes an ozone aqueous solution of a degree and is discharged from the drain pipe 112.

The anode water discharged from the drain pipe 112 is immediately sprayed on the floor (not shown) to be disinfected, and
The cathode water from 3 returns to a water tank (not shown) containing the water to be electrolyzed, and is supplied again into the electrolysis chamber 1.

Embodiment 2 FIG. 2 is a conceptual explanatory view showing a partial cross section for explaining a floor disinfection apparatus according to Embodiment 2 of the present invention, and includes a truck 9, a water tank 2, and a recovered water tank 41 described later. Only a cross-sectional view is shown, and other portions are shown in a block diagram or a schematic diagram. In the floor disinfecting apparatus 20 of FIG. 2, reference numeral 10 denotes a solution manufacturing apparatus, 2 denotes a water tank for storing electrolyzed water, 3 denotes an ozone aqueous solution spraying apparatus (hereinafter, spraying apparatus) for spraying an ozone aqueous solution, and 4 denotes sprayed ozone. An ozone aqueous solution recovery device that collects an aqueous solution
5 is a pipe serving as a water supply device for sending cathodic water discharged from the cathode side of the solution production device 10 to the water tank 2, and 6 is a floor for cleaning a floor surface to be disinfected before spraying an ozone aqueous solution. Surface cleaning device, 7 is a power supply device for driving the device, 8 is a control device for controlling the entire operation of the device 20, 9 is a cart for making the floor disinfection device movable, G
Is the floor to be disinfected.

The detailed structure of the solution producing apparatus 10 is as shown in FIG. 1, and its water supply pipe 108 is connected to the water tank 2 via a water supply pump 19. On the other hand, the drain pipe 112 of the solution production apparatus 10 is connected to the spraying apparatus 3 and the drain pipe 113.
Is connected to the water tank 2 via a pipe 5. The spraying device 3 only needs to have a function of spraying the ozone aqueous solution supplied from the drain pipe 112 on the floor G as uniformly and widely as possible, for example, in the form of mist or mist.
Reference numeral 31 denotes a spray nozzle that extends downward from the spray device 3 through the base 91 of the carriage 9.

The water collecting device 4 includes a collected water tank 41 for storing the collected ozone aqueous solution, a lid 411 for hermetically sealing the collected water tank 41, a vacuum motor 42 for making the inside of the collected water tank 41 a negative pressure, and a vacuum motor 42. And a suction pipe 44 for sucking the dispersed ozone aqueous solution. A divergent suction port 441 is provided at the tip of the suction tube 44.
The opening end of the suction port 441 is close to the floor surface G so that the sterilized ozone aqueous solution can be easily sucked efficiently. The recovered water tank 41 is located on the bottom of the tank 41,
And a drain pipe 412 extending downward through the shelf 92 and the base 91 in order. The drain pipe 412 has a valve 413.

The floor cleaning device 6 has substantially the same structure as the suction pipe 44 of the recovery device 4, and one end thereof is connected to a recovery water tank 41, which is under negative pressure by a vacuum motor 42. In addition, a divergent suction port 61 is provided at the other end, and the open end of the suction port 61 has a floor surface G to facilitate efficient suction of dust on the floor surface G by negative pressure in the recovered water tank 41. And the proximity state. Note that the floor cleaning device 6 is fixedly supported by support fittings 911 and 921 provided at respective ends of the base 91 and the shelf 92.

Further, in FIG. 2, the cart 9 is
1. Shelf 92, base 91 provided on base 91
, Four (two of which are not shown) wheel receivers 93, four (two of which are not shown) wheels 94 rotatably mounted on the wheel receiver 93, a rear wall portion 95, and a push arm 96 fixed to the upper end of the rear wall portion 95,
The shelf 92 is fixed to the rear wall 95 together with the base 91, and the shelf 92 is supported by the base 91 with columns 97 and 98.

Next, the operation of the movable floor disinfecting apparatus 20 of FIG. 2 will be described. The water to be electrolyzed such as tap water is stored in the water tank 2, and the main power switch 81 of the control device 8 is turned on to put the power supply device 7 into an operating state. When the power supply device 7 is turned on, the solution producing device 10, the spraying device 3, the water pump 19, the vacuum motor 42, and the control device 8 operate simultaneously. Due to the operation of the vacuum motor 42, the inside of the recovery water tank 41 becomes a negative pressure, and the dust on the floor G is sucked and removed by the floor cleaning device 6. The water in the water tank 2 is continuously and forcibly fed at a constant flow rate into the solution manufacturing apparatus 10 by the water supply pump 19 and is electrolyzed in the solution manufacturing apparatus 10. Cathode water is discharged from 113 respectively. Next, the ozone aqueous solution is sprayed from the spray nozzle 31 via the spraying means 3 to disinfect the cleaned floor surface G.
In the meantime, the cathode water discharged from the drain pipe 113
And is sent to the water tank 2 via the tank for electrolysis again.

When the movable floor disinfecting apparatus 20 is advanced in the direction of arrow A during the disinfecting operation, the floor G is disinfected as the apparatus 20 advances, and the disinfected ozone aqueous solution remaining on the floor G Is sucked from the suction port 441 of the suction pipe 44 and collected in the collection water tank 41.

When the disinfecting operation of the floor surface G is completed, the movable floor disinfecting device 20 is moved to a place where the disinfected ozone aqueous solution can be dumped, and the valve 413 is opened there. It is discharged from the drain pipe 412.

Embodiment 3 FIG. FIG. 3 is a conceptual explanatory view showing a partial cross section for explaining a movable floor disinfection device as a third embodiment of the present invention, which is different from the second embodiment. The only difference is that a rotating brush 32 and an ozone aqueous solution supply pipe 33 are used in place of the spray nozzle 31 of the second embodiment, and the other structure is the same as that of the second embodiment. When the movable floor disinfecting apparatus 20 is operated, the rotating brush 32 is rotated by a motor (not shown) in the spraying apparatus 3, and the aqueous ozone solution supplied from the solution producing apparatus 10 is rotated from the supply pipe 33 by the rotating brush. 32. Thus, the rotating brush 32 rotates with the ozone aqueous solution contained therein, and rotates on the floor surface G.
Since the floor surface G is disinfected while being cleaned, the floor surface G is more effectively disinfected.

Embodiment 4 FIG. 4 is a conceptual explanatory view showing a partial cross section for explaining a movable floor disinfecting apparatus according to a fourth embodiment of the present invention. The only difference is that a drying device 34 for forcibly drying the wetness of the floor surface is additionally provided behind 44, and the other structure is the same as that of the second embodiment. Drying device 34
For example, a means capable of substantially removing a small amount of the sterilized ozone aqueous solution remaining on the floor surface G after the suction and collection by the collection device 4 may be used, for example, a blow dryer or a hot-air dryer. When the movable floor disinfecting apparatus 20 is operated, the floor G is disinfected as the apparatus 20 proceeds, and the disinfected ozone aqueous solution on the floor G is sucked and collected into the collected water tank 41 from the suction port 441 of the suction pipe 44. Since the drying is performed by the drying device 34, the floor surface can be used immediately after the disinfection operation.

[0026]

As described above, according to the present invention, an aqueous solution of ozone obtained by electrolyzing water to be electrolyzed is used in a case where the aqueous solution is 10 p.
By spraying on the floor while maintaining the ozone concentration of pm or more, it exhibits an excellent bactericidal action not only against Escherichia coli, staphylococci, Pseudomonas aeruginosa but also spore-forming Bacillus subtilis. The floor can be sufficiently disinfected. The ozone aqueous solution is substantially harmless to the human body even at a high ozone concentration, and since the ozone concentration gradually decreases over time, the used one is abandoned to rivers without any detoxification treatment. can do. Further, the above-mentioned ozone aqueous solution having a high ozone concentration can be easily and inexpensively produced by using ordinary water such as tap water as electrolyzed water and electrolyzing it.

In the electrolysis method using a solid electrolyte membrane, when hard water is used as the water to be electrolyzed, Ca ions and the like generated during the electrolysis of water inhibit the permeation of hydrogen ions through the solid electrolyte membrane. Although the production efficiency of the ozone aqueous solution may be reduced, the use of soft water having a hardness of 20 degrees or less, particularly a hardness of 15 degrees or less can reduce the above problem and efficiently produce the ozone aqueous solution. When the cathodic water generated during the electrolysis of water is reused as the water to be electrolyzed, there is no need to take measures for disposing of the cathodic water, and the floor disinfecting apparatus of the present invention has the advantage of being compact.

Further, a water tank for containing the electrolyzed water, an ozone aqueous solution producing apparatus for electrolyzing the electrolyzed water from the water tank to produce an ozone aqueous solution, an ozone aqueous solution spraying apparatus for spraying the ozone aqueous solution, and an ozone sprayed A floor disinfection device equipped with an ozone aqueous solution recovery device that collects an aqueous solution, while moving it, performs the production of an ozone aqueous solution, the application of an ozone aqueous solution to a cleaned floor, and the collection of a sterilized ozone aqueous solution. Therefore, various floor surfaces can be efficiently and highly disinfected.

Furthermore, if the floor surface on which the aqueous ozone solution is sprayed is made substantially free of dust by a floor cleaning device before the aqueous ozone solution is sprayed, the sterilizing action of the ozone aqueous solution is further improved.

As a spraying device of the floor disinfection device described above,
If a rotating brush that cleans the floor and a device that supplies an ozone aqueous solution to the rotating brush are used, the rotating brush rotates while containing the ozone aqueous solution to clean and disinfect the floor. The floor can be more effectively disinfected.

Further, as the floor disinfection device described above,
If a device provided with a drying device for drying a floor surface disinfected by spraying an ozone aqueous solution is used, the floor surface can be used immediately after the disinfection work.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an ozone aqueous solution manufacturing apparatus for manufacturing an ozone aqueous solution according to a first embodiment of the present invention.

FIG. 2 is a conceptual explanatory view showing a partial cross section for describing a floor disinfection device according to a second embodiment of the present invention.

FIG. 3 is a conceptual explanatory view showing a partial cross section for describing a floor disinfection device as a third embodiment of the present invention.

FIG. 4 is a conceptual explanatory view showing a partial cross section for describing a floor disinfection device according to Embodiment 4 of the present invention.

[Explanation of symbols]

10 Ozone aqueous solution production equipment, 101 Electrolysis chamber, 1
02 solid electrolyte membrane, 103 anode, 104 cathode, 2
0 Floor disinfection device, 2 water tank, 3 ozone aqueous solution spraying device, 4 ozone aqueous solution recovery device, 6 floor cleaning device, 7 power supply device, 9 carts, G floor surface.

Claims (9)

[Claims] 1. A floor disinfection method comprising spraying an ozone aqueous solution obtained by electrolyzing water to be electrolyzed on a floor while the aqueous solution maintains an ozone concentration of 10 ppm or more. 2. The floor disinfection method according to claim 1, wherein the electrolyzed water is soft water having a water hardness of 20 degrees or less. 3. The floor surface disinfection method according to claim 2, wherein water discharged from the cathode side is reused as electrolyzed water during electrolysis of the electrolyzed water. 4. The floor on which the aqueous ozone solution is sprayed is substantially free of dust.
3. The floor disinfection method according to any one of 3. 5. A water tank containing electrolyzed water, an ozone aqueous solution manufacturing apparatus for electrolyzing the electrolyzed water from the water tank to produce an ozone aqueous solution, an ozone aqueous solution spraying apparatus for spraying the ozone aqueous solution, and an aqueous solution. A floor disinfection device comprising an ozone aqueous solution recovery device for recovering an ozone aqueous solution. 6. The floor disinfection device according to claim 5, further comprising a water supply device for sending water discharged from a cathode side of the ozone aqueous solution production device to a water tank. 7. A floor cleaning device for cleaning a floor before an aqueous ozone solution is sprayed.
The floor disinfection device according to the above. 8. The floor disinfection device according to claim 5, further comprising a drying device for drying the floor surface disinfected by spraying the ozone aqueous solution. 9. The floor surface disinfection device according to claim 5, wherein the ozone aqueous solution spraying device includes a rotary brush for cleaning a floor surface, and a device for supplying the ozone aqueous solution to the rotary brush.