阅读说明：本技术 清洗液生成装置、清洗-涂布液生成装置 (Cleaning liquid generating apparatus and cleaning-coating liquid generating apparatus ) 是由 神田智一 于 2020-01-09 设计创作，主要内容包括：清洗液生成装置(1)由生成清洗液的液体改质部(清洗液生成部)(5)、贮藏清洗液的罐(15)、加压清洗液并使之循环的泵(17)、及清洗液的流路(31～35)等构成。液体改质部(5)由作为其本体的内部空间被隔开的筒状流路(5a)、在该内部对置的第1电极部(11)及第2电极部(12)构成,且具备对该两电极间施加电压的电源(7)。罐(15)是贮存因电解而在液体改质部(5)生成的清洗液。泵(17)将清洗液提供给液体改质部(5)或使其在液体改质部(5)中循环。(The cleaning liquid generating device (1) is composed of a liquid modifying part (cleaning liquid generating part) (5) for generating the cleaning liquid, a tank (15) for storing the cleaning liquid, a pump (17) for pressurizing and circulating the cleaning liquid, and flow paths (31-35) for the cleaning liquid. The liquid modifying section (5) is composed of a cylindrical flow path (5a) having an internal space as a main body thereof partitioned, and a 1 st electrode section (11) and a 2 nd electrode section (12) facing each other in the interior, and is provided with a power supply (7) for applying a voltage between the two electrodes. The tank (15) stores the cleaning liquid generated in the liquid reforming section (5) by electrolysis. The pump (17) supplies the cleaning liquid to the liquid reforming section (5) or circulates the cleaning liquid in the liquid reforming section (5).)

1. A cleaning liquid generating apparatus includes:

a cylindrical flow path having an inlet and an outlet for the liquid arranged at an interval therebetween, and formed with a flow path through which a conductive liquid serving as a source liquid of a cleaning liquid to be generated can flow;

a rod-shaped 1 st electrode portion which is disposed in parallel to the central axis direction of the cylindrical flow path so as to contact the liquid in the flow path, and functions as an anode or a cathode;

a rod-shaped 2 nd electrode unit which is disposed in the flow path so as to be in contact with the liquid, is spaced apart from the 1 st electrode unit, is disposed parallel to the central axis direction, and functions as an electrode having a polarity opposite to that of the 1 st electrode unit; and

a DC power supply for applying a DC voltage between the 1 st electrode part and the 2 nd electrode part.

2. The cleaning liquid generating apparatus as claimed in claim 1,

the central portion of the central axis is one selected from a straight line, a circular arc, U, V, and a C-shape.

3. The cleaning liquid generating apparatus according to claim 1 or 2,

the cleaning liquid generating apparatus includes a liquid circulating unit including a pump and a flow path for circulating the liquid so as to cause the liquid to repeatedly flow in the cylindrical flow path.

4. The cleaning liquid generating apparatus according to claim 1 or 2,

the DC power supply includes a polarity switching unit for automatically and repeatedly switching the polarities of the 1 st electrode part and the 2 nd electrode part at intervals of a set time.

5. A cleaning-coating liquid generating apparatus includes:

a cylindrical flow path having an inlet and an outlet for a liquid disposed at an interval therebetween, and formed with a flow path through which a liquid to be a source liquid of a cleaning-coating liquid to be generated can flow;

a rod-shaped 1 st electrode portion which is disposed in parallel to the central axis direction of the cylindrical flow path so as to contact the liquid in the flow path, and functions as an anode or a cathode;

a rod-shaped 2 nd electrode unit which is disposed in the flow path so as to be in contact with the liquid, is spaced apart from the 1 st electrode unit, is disposed parallel to the central axis direction, and functions as an electrode having a polarity opposite to that of the 1 st electrode unit;

a dc power supply for applying a dc voltage between the 1 st electrode part and the 2 nd electrode part;

a coating liquid generating section provided with a coating composition generator for making the liquid flowable and discharging a coating material to the liquid, and giving the liquid a coating function; and

and a liquid circulating unit including a pump and a flow path for circulating the liquid between the cylindrical flow path and the coating liquid generating section.

6. The cleaning-coating liquid generating apparatus according to claim 5,

the central portion of the central axis is one selected from a straight line, a circular arc, U, V, and a C-shape.

7. The cleaning-coating liquid generating apparatus according to claim 5 or 6,

the DC power supply includes a polarity switching unit for automatically and repeatedly switching the polarities of the 1 st electrode part and the 2 nd electrode part at intervals of a set time.

Technical Field

The present invention relates to a cleaning liquid generating apparatus and a cleaning-coating liquid generating apparatus used for cleaning and coating surfaces of vehicles, structures, and the like. More particularly, the present invention relates to a cleaning liquid producing apparatus and a cleaning-coating liquid producing apparatus which exhibit a "cleaning effect" of dropping dirt adhering to a surface of a vehicle outer panel, an outer wall surface of a building, a window glass surface, a civil engineering structure such as a shoulder stone of a bridge or a road, and a "coating effect" of preventing the surface of an object from being soiled.

Background

Various cleaning liquids have been proposed as means for easily dropping dirt adhering to a surface exposed to external air, such as a coated surface of an outer panel of a vehicle, an outer wall surface of a building, a window glass surface of a building, and an outer surface of a civil structure such as a shoulder stone of a bridge or a road. However, vehicles used outdoors, exterior walls of various structures, window glass, and the like are exposed to outside air, and even if dirt is attached, the vehicle or the window glass is contaminated again in a very short period of time, and is forced to be cleaned again in a short period of time.

Further, since dirt adhering to an outer panel of a vehicle, an outer wall of a building, a window glass of a building, and the like, which are constantly exposed to outside air, is extremely hard to be removed, there is a problem that cleaning takes time and effort. Further, when tough dirt adhering to these surfaces is strongly wiped off with a brush or the like and falls off, there is a possibility that the surfaces are scratched. Therefore, there is a problem that it is not easy to drop dirt from an outer panel of a self-service automobile (e.g., a senior imported vehicle, a sports car, a vintage car) or the like which is used with care.

The present applicant has proposed a system having a ceramic composite, in which a slightly water-soluble silicon oxide is eluted from the ceramic composite to form an aqueous silicon oxide solution, and the aqueous silicon oxide solution is caused to flow over and contact the surface of an outer panel of a vehicle or the like to form a transparent thin film of the eluted silicon oxide on the surface of the outer panel (patent document 1). In addition, there has been proposed a technique of, when producing cleaning water for forming a silica film in a coating liquid producing apparatus, passing the cleaning water through a magnetic field or ultraviolet rays in order to activate the cleaning water (patent documents 2 and 3, etc.).

On the other hand, in order to reduce the amount of detergent used when washing clothes and the like, a washing machine has also been proposed in which washing water is electrolyzed by an electrolysis device to wash the laundry by electrolysis (for example, patent document 4). Active oxygen generated by electrolysis of dirt is used to decompose the dirt and sterilize bacteria.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-

Patent document 2: japanese patent laid-open publication No. 2003-80184

Patent document 3: WO2017/149741

Patent document 4: japanese patent laid-open publication No. 2003-24692

Disclosure of Invention

Problems to be solved by the invention

However, the system described in patent document 1 has an advantage that a thin film (nano-scale) of silicon oxide can be applied over a large area from a ceramic composite using common tap water or the like, but is not disclosed in that point, because the surface treatment (cleaning) of the object to be coated is assumed. As disclosed in patent document 3, the amount of elution of slightly water-soluble silicon oxide from washing water is increased by activating the washing water with a magnetic field, and a magnet, an ultraviolet lamp, or the like is required to form a strong magnetic field. Therefore, in the field work, a portable cleaning device or coating device equipped with a magnet and an ultraviolet lamp is heavy due to the magnet and the ultraviolet lamp, and has various problems such as high cost of the magnet and the ultraviolet lamp, complicated structure, and poor maintainability.

The electrolyzing device for electrolyzing water in a washing machine disclosed in patent document 4 is an electrolyzing device based on a washing machine mounted on clothes used indoors, and the like. In the electrolytic device mounted on the washing machine, in order to efficiently generate electrolytic water, a plate is used as an electrode to increase the area, thereby reducing the size. Since the amount of impurities, chlorine, and the like contained in the washing water varies depending on the region and the like, and the short circuit may occur due to a change in the supply current, this electrolytic device needs a protection circuit for protecting the supply circuit (see paragraph [0130] of the specification of patent document 3). As in the protection circuit, if an electrically complicated and slim circuit is provided, it is difficult to use the protection circuit in a cleaning device or a coating device for vehicles, buildings, and the like, which are often used outdoors.

The present invention has been made in view of the above problems, and has been made to achieve the following object. The invention aims to provide a cleaning liquid generating device and a cleaning-coating liquid generating device which can stably and efficiently generate cleaning water and coating liquid as electrolyzed water.

Another object of the present invention is to provide a cleaning liquid generating apparatus and a cleaning-coating liquid generating apparatus capable of generating cleaning water and a coating liquid in a system having a simple structure and reduced weight.

Still another object of the present invention is to provide a cleaning-coating liquid forming apparatus capable of forming a cleaning-coating liquid having both cleaning and coating functions.

Means for solving the problems

To achieve the above object, the present invention adopts the following means. The cleaning liquid generating apparatus of the present invention 1 includes: a cylindrical flow path having an inlet and an outlet for the liquid arranged at an interval therebetween, and formed with a flow path through which a conductive liquid serving as a source liquid of a cleaning liquid to be generated can flow;

a rod-shaped 1 st electrode portion which is disposed in parallel to the central axis direction of the cylindrical flow path so as to contact the liquid in the flow path, and functions as an anode or a cathode;

a rod-shaped 2 nd electrode unit which is disposed in the flow path so as to be in contact with the liquid, is spaced apart from the 1 st electrode unit, is disposed parallel to the central axis direction, and functions as an electrode having a polarity opposite to that of the 1 st electrode unit; and

a DC power supply for applying a DC voltage between the 1 st electrode part and the 2 nd electrode part.

The cleaning liquid generating apparatus according to claim 2 is characterized in that, in the cleaning liquid generating apparatus according to claim 1, the central portion of the central axis is one selected from a straight line, an arc, U, V, and a C-shape.

A cleaning liquid generating apparatus according to the present invention 3 is the cleaning liquid generating apparatus according to the present invention 1 or 2, comprising: and a liquid circulation unit for circulating the liquid by repeatedly flowing the liquid in the cylindrical flow path.

The cleaning liquid generating apparatus according to claim 4 is the cleaning liquid generating apparatus according to claim 1 or 2, wherein the dc power supply includes: and a polarity switching unit for automatically and repeatedly switching the polarities of the 1 st electrode part and the 2 nd electrode part at intervals of a set time.

The cleaning-coating liquid generating apparatus of the present invention 1 comprises:

a cylindrical flow path having an inlet and an outlet for a liquid disposed at an interval therebetween and formed with a flow path for allowing a liquid to flow, which is a source liquid of a cleaning-coating liquid to be generated;

a rod-shaped 1 st electrode portion which is disposed parallel to the central axis direction of the cylindrical flow path so as to be in contact with the liquid, and functions as an anode or a cathode;

a rod-shaped 2 nd electrode portion which is disposed at a distance from the 1 st electrode portion so as to be in contact with the liquid, is disposed parallel to the central axis direction, and functions as an electrode having a polarity opposite to that of the 1 st electrode portion;

a dc power supply for applying a dc voltage between the 1 st electrode part and the 2 nd electrode part;

a coating liquid generating section including a coating composition generator for making the liquid flowable and discharging a coating material to the liquid, and applying a coating function to the liquid; and

and a liquid circulating unit including a pump and a flow path for circulating the liquid between the cylindrical flow path and the coating liquid generating section.

The cleaning-coating liquid forming apparatus of the present invention 2 is characterized in that, in the cleaning-coating liquid forming apparatus of the present invention 1, the central axis of the cylindrical flow path is one selected from a straight line, an arc, U, V, and a C-shape.

The cleaning-coating liquid forming apparatus according to claim 3 is the cleaning-coating liquid forming apparatus according to claim 1 or 2, wherein the dc power supply includes: and a polarity switching unit for automatically and repeatedly switching the polarities of the 1 st electrode part and the 2 nd electrode part at intervals of a set time.

Effects of the invention

The cleaning liquid generating apparatus and the cleaning-coating liquid generating apparatus of the present invention are a system capable of stably and efficiently generating cleaning water and coating liquid as electrolyzed water and reducing the weight with a simple structure. The cleaning-coating liquid producing apparatus of the present invention can produce a cleaning-coating liquid having both functions of a cleaning liquid and a coating liquid, and therefore can perform cleaning operation and coating operation at the same time.

Drawings

Fig. 1 is a schematic configuration diagram of a "cleaning liquid generating apparatus" according to embodiment 1 of the present invention.

Fig. 2 is a schematic configuration diagram of a "cleaning liquid generating apparatus" according to embodiment 2 of the present invention.

Fig. 3 is a schematic configuration diagram of a "cleaning liquid generating apparatus" according to embodiment 3 of the present invention.

FIG. 4 is a schematic configuration diagram of a "cleaning-coating liquid forming apparatus" according to embodiment 1 of the present invention.

Fig. 5 is a diagram showing a modification example of the "cylindrical flow path" constituting the "liquid modifying section" of the present invention.

Fig. 6 is a sectional view of a coating composition generator (gas cylinder device) provided in the cleaning-coating liquid generating apparatus of fig. 5.

Fig. 7 (a) is a sectional view taken along the line a-B of the coating composition generator (gas cylinder device) shown in fig. 6, and fig. 7 (B) is a bottom view of the liquid discharge pipe shown in fig. 6.

Fig. 8 shows a schematic diagram of a method for evaluating the cleaning effect.

Fig. 9 shows a schematic diagram of a method for evaluating the coating effect.

Detailed Description

[ embodiment 1 of cleaning liquid producing apparatus ]

Fig. 1 is a schematic diagram showing a schematic configuration of a cleaning liquid generating apparatus according to embodiment 1. As shown in fig. 1, a cleaning liquid generating apparatus 1 according to embodiment 1 is roughly composed of a liquid modifying section (cleaning liquid generating section) 5 for generating a cleaning liquid, a tank 15 for storing the cleaning liquid, a pump 17 for pressurizing and circulating the cleaning liquid, and flow paths 31 to 35 for the cleaning liquid. The liquid modifying section 5 is composed of a cylindrical flow path (cylindrical body) 5a partitioned in an internal space as a main body thereof and a 1 st electrode section 11 and a 2 nd electrode section 12 opposed to each other in the internal space, and includes a power supply 7 for applying a voltage between the two electrodes. The tank 15 is used to temporarily store the cleaning liquid generated in the liquid reforming section 5. The pump 17 supplies the cleaning liquid to the liquid reforming section 5 or circulates the cleaning liquid in the liquid reforming section 5. The tank 15, the pump 17, and the cylindrical flow path 5a are connected by flow paths 31 to 35 as pipes, and the cleaning liquid is circulated therebetween.

Hereinafter, each element constituting the cleaning liquid generating apparatus 1 will be specifically described. The cylindrical flow path 5a is a cylindrical body made of engineering plastic such as a hard polyvinyl chloride pipe having corrosion resistance, and the inside thereof is hollow. The cylindrical flow path 5a includes a cylindrical space through which a liquid (for example, public tap water) serving as a source liquid of the cleaning liquid to be generated in the present example can flow smoothly. In order to circulate the liquid in the cylindrical space, a liquid inlet 21 for allowing the liquid to flow in and a liquid outlet 22 for allowing the liquid to flow out are disposed at both ends of the cylindrical flow path 5a with a gap therebetween. In the cylindrical flow path 5a, rod-shaped 1 st electrode portions 11 and 2 nd electrode portions 12 are fixedly disposed so as to face each other at both ends thereof. The 1 st electrode 11 and the 2 nd electrode 12 are linearly arranged in the space in the cylindrical flow path 5a and are exposed to the space. More specifically, the rod-shaped 1 st and 2 nd electrodes 11 and 12 are arranged such that their axes are parallel to the center line of the cylindrical flow path 5 a. The liquid inlet 21, which opens at one end of the cylindrical flow path 5a, is disposed in the vicinity of the 1 st electrode portion 11.

The liquid outlet 22, which opens at the other end of the cylindrical flow path 5a, is disposed in the vicinity of the 2 nd electrode portion 12. That is, the cylindrical flow path 5a is not a storage container like a tank, but a case for electrolyzing a liquid such as water inside. Therefore, the inner space of the cylindrical flow path 5a may be a flow path having a hexagonal or quadrangular prismatic inner space, even if the cross-sectional shape is not a cylinder, as long as the liquid can flow. Both ends of the cylindrical flow path 5a in this example are blocked to prevent the liquid from leaking. One ends of the 1 st electrode portion 11 and the 2 nd electrode portion 12 are fixed to both ends of the cylindrical flow path 5a, respectively. The 1 st electrode portion 11 and the 2 nd electrode portion 12 are connected to a direct current power supply 7 via electric wires, respectively. The interval between the 1 st electrode 11 and the 2 nd electrode 12 varies depending on the dc voltage (5 to 30V in this example) used, and is arranged at such an interval that no overcurrent flows even if short-circuited. For example, public tap water flowing into the space inside the cylindrical flow path 5a from the liquid inlet 21 flows inside the cylindrical flow path 5a in the direction of the liquid outlet 22.

In this flowing process, water contacts the 1 st electrode portion 11 and the 2 nd electrode portion 12 and is applied with a voltage, whereby the water is electrolyzed to become electrolyzed water containing active oxygen, hydrogen, and the like. As a result, water such as public tap water is changed into cleaning liquid having a cleaning function as electrolytic water, and is discharged from the liquid outlet 22. The liquid inlet 21, the liquid outlet 22, and the like provided in the cylindrical flow path 5a are opened by plastic working, welding, adhesion, or the like and attached. In this example, the cylindrical flow path 5a is made of synthetic resin, but may be made of metal such as stainless steel having high corrosion resistance. The water reformed into electrolytic water by electrolysis is discharged from the liquid outlet 22 and stored in the tank 15 to be washing water. In general, water flowing through the cylindrical flow path 5a only once contains a small amount of gas such as active oxygen and does not become electrolyzed water having sufficient cleaning ability, and therefore, the water is circulated many times to become electrolyzed water. The washing water stored in the tank 15 is pressurized again by the pump 17, and is supplied to the liquid inlet 21 through the flow path 31, the flow path 32, and the flow path 33, and circulates.

In addition, a typical example of "water", "liquid" or "liquid" in the present embodiment, that is, a typical example of a liquid serving as a source liquid of the cleaning liquid, may be "water" such as public tap water. The liquid applicable to the present invention is not necessarily limited to water such as public tap water, and may be clean river water. Further, a small amount of chemical solution (for example, a decomposable surfactant), salt, sodium hydroxide, chlorine gas, hypochlorite, or the like which is harmless to the environment may be added to the water as a main component, and a substance which promotes electrolysis and generation of a bactericidal component may be added. In the present embodiment, the 1 st electrode portion 11 is a rod-shaped electrode that functions as an anode (+ electrode). The rod-shaped 1 st electrode portion 11 is made of a bar material as a base material made of conductive metal, for example, copper or titanium, and a thin film member as a catalyst is preferably applied to the surface thereof by plating or the like. The thin film member is preferably made of platinum, gold, titanium oxide, or the like, for example, from the viewpoint of electrolytic characteristics. The 2 nd electrode portion 12 is also made of the same material and has the same shape. The electrode member may be made of a material having conductivity and being made of a nonmetal such as a graphite electrode.

The 1 st electrode 11 has one end exposed to the internal space of the cylindrical flow path 5a so as to be in contact with the liquid flowing through the cylindrical flow path 5a, and the other end fixed to the end of the cylindrical flow path 5a so as to be insulated from the cylindrical flow path 5 a. The 1 st electrode portion 11 is electrically connected to the positive electrode (+ pole) of the power supply 7 via an electric wire. A2 nd electrode part 12 is fixed to the other end of the cylindrical flow path 5a at a position facing the 1 st electrode part 11. The 2 nd electrode portion 12 is a rod-shaped electrode that functions as a cathode (-electrode) in the present embodiment. The rod-like 2 nd electrode portion 12 is exposed to the internal space of the cylindrical flow path 5a at one end thereof and fixed to the cylindrical flow path 5a in an insulated manner at the end of the cylindrical flow path 5a at the other end thereof so as to be in contact with the liquid flowing in the cylindrical flow path 5a, similarly to the 1 st electrode portion 11. The 2 nd electrode portion 12 is electrically connected to the negative electrode (-pole) of the power supply 7 via an electric wire.

That is, the rod-shaped 1 st electrode portion 11 and the rod-shaped 2 nd electrode portion 12 are disposed so that the distal end portions thereof face each other, are in contact with the liquid, and are exposed to the internal space of the cylindrical flow path 5 a. As described above, the 1 st electrode 11 and the 2 nd electrode 12 are arranged such that their axes are parallel to the center line of the cylindrical flow path 5 a. Since the 1 st electrode 11 and the 2 nd electrode 12 are long rod-shaped, the liquid can contact them while flowing, and the contact time is long, so that the electrolysis efficiency is high. In embodiment 1, an electrode functioning as an anode (+ pole) is provided on the upstream side and an electrode functioning as a cathode (-pole) is provided on the downstream side with respect to the liquid flowing through the tubular flow path 5a, but the arrangement (layout) of the electrodes is not limited to this arrangement and may be reversed. That is, an electrode functioning as an anode (+ pole) may be provided on the downstream side, and an electrode functioning as a cathode (-pole) may be provided on the upstream side.

The power supply 7 applies a dc voltage to the liquid flowing through the tubular flow path 5 a. The power supply 7 is electrically connected to the 1 st electrode portion 11 and the 2 nd electrode portion 12 via electric wires. When a liquid flows through the cylindrical flow path 5a, a voltage is applied to the liquid (the liquid flowing through the cylindrical flow path 5a) contacted by 2 electrode portions, i.e., the 1 st electrode portion 11 and the 2 nd electrode portion 12, when the power supply 7 is turned on, and as a result, the liquid is electrolyzed and reformed into a cleaning liquid. That is, by applying a voltage, water is electrolyzed to become electrolyzed water containing active oxygen, hydrogen, and the like. The electrolyzed water gradually imparts a cleaning function to the liquid of the source liquid, and the electrolyzed water is changed into a cleaning liquid. It is known that the micro-foams and nano-foams containing active oxygen and hydrogen in the electrolyzed water have a function of removing dirt such as dirt from clothes, coated surfaces, and the like. When the water contains an aqueous solution of sodium chloride, hypochlorous acid water containing hypochlorous acid (HClO) as a main component can be generated when the aqueous solution is electrolyzed. Hypochlorous acid water is also electrolytic water having a bactericidal effect, and a small amount of sodium chloride may be added to soil requiring sterilization.

The cleaning liquid generator 1 includes the pump 17, the flow paths 31 to 35, and the like as circulating means for circulating the liquid so as to repeatedly flow the liquid through the cylindrical flow path 5a, as described above. That is, in embodiment 1, a liquid (for example, public tap water) serving as a source liquid of the cleaning liquid is pressurized and fed under pressure by the pump 17. The liquid pumped by the pump 17 flows through the tubular flow path 5a via the flow paths 31 to 33 and passes through the tubular flow path 5a, and further repeatedly passes through the flow paths 34 and 35 and the tank 15 in the tubular flow path 5 a. By circulating the cleaning water in this manner, the liquid serving as the source liquid of the cleaning liquid to be generated repeatedly flows through the cylindrical flow path 5a, and a cleaning liquid having a strong cleaning power can be generated.

When the liquid is pumped and circulated repeatedly through the flow paths 31 to 35 in this manner, the liquid repeatedly passes through the inside of the cylindrical flow path 5a, a voltage is applied in this process, and the liquid of the source liquid (for example, common tap water) is electrolyzed to generate hydrogen at the cathode and oxygen at the anode to become a cleaning liquid as electrolyzed water. That is, a liquid (e.g., public tap water) serving as a source liquid of the cleaning liquid is repeatedly caused to flow through the cylindrical flow path 5a, and a voltage is applied thereto, thereby generating a liquid having a cleaning function. Further, since the public tap water contains a small amount of ionized Ca, Fe, Al, and the like, the current can be conducted. In addition, for example, water containing a trace amount of common salt added to tap water is usually electrolyzed to generate sodium hydroxide (NaOH) and chlorine (Cl)₂) Hydrogen (H)₂) However, since the cylindrical flow path 5a of the present embodiment does not have a partition wall for partitioning electrodes, they are not generated at a high concentration. The electrolytic water of the present invention is different in composition depending on the kind of the substance mixed in the water, but the electrolytic water of the present invention achieves cleaning of dirt on the surface mainly by the cleaning effect of the active oxygen and hydrogen fine bubbles, the oxidation of oxygen, and the reduction of hydrogen.

[ method of Using cleaning solution ]

The cleaning liquid generated by the cleaning liquid generation device 1 is stored in the tank 15, and is sprayed to the object to be cleaned by a liquid spraying device including, for example, a pump, a spray nozzle, and the like. The object to be sprayed with the cleaning liquid generated by the cleaning liquid generation apparatus 1 is not particularly limited. Specific examples of the object include bodies of various moving bodies such as vehicles, ships, and airplanes, exterior walls of structures such as buildings, walls exposed to outside air, surface portions of various structures and devices such as various electric appliances installed outdoors, and windows having transparent portions made of glass or transparent resin. The cleaning liquid generated by the cleaning liquid generation device 1 is a cleaning liquid that can be used for cleaning windows provided in various moving bodies such as vehicles and ships, and that is, can be used as a window cleaning liquid.

As described above, the cleaning liquid generating apparatus can provide a cleaning function to a liquid such as water without using a cleaning agent or the like. Further, when a cleaning liquid such as a surfactant is used as a liquid to be a source liquid of the cleaning liquid to be generated, a more excellent cleaning effect can be exhibited. Further, since the cylindrical flow path 5a of the liquid reforming section 5 is formed in an elongated cylindrical shape, the liquid reforming effect on the liquid passing through the cylindrical flow path 5a (liquid to be a source liquid of the cleaning liquid to be generated) is greater than that in the case of generation in a container such as a tank for storage and use. That is, compared with the case where the cylindrical flow path 5a is formed by a vessel such as a tank, since the cylindrical flow path 5a is formed by a cylindrical flow path, space efficiency is improved, and the liquid passing through the liquid reforming section 5 per unit time is continuous, and as a result, efficient liquid reforming can be performed even with a small amount of liquid.

[ embodiment 2 of cleaning liquid producing apparatus ]

Fig. 2 shows a schematic configuration of the cleaning liquid generating apparatus according to embodiment 2. Since the basic configuration of embodiment 2 is substantially the same as that of embodiment 1, redundant description thereof will be omitted and used, and only the differences from embodiment 1 will be described below. The cleaning solution generating apparatus 1 according to embodiment 2 has 3 first electrode portions 11 functioning as anodes (+ electrodes) arranged in parallel with each other. Further, 3 second electrode portions 12 (hereinafter, referred to as "electrode portions 12") which function as cathodes (electrodes) facing the first electrode portion 11 (hereinafter, referred to as "electrode portions 11") are fixedly disposed in parallel to each other so as to face the electrode portions 11.

The 3 electrode portions 11 functioning as anodes (+ poles) are electrically connected to the positive electrodes (+ poles) of the power supply 7 via electric wires, respectively. The 3 electrode portions 12 functioning as cathodes (-poles) are electrically connected to the negative electrodes (-poles) of the power supply 7 via electric wires, respectively. As described above, the number of electrode portions is not limited to 1 as illustrated in fig. 1, and may be a plurality as illustrated in fig. 2. The cleaning liquid generating apparatus according to embodiment 2 is the same as the cleaning liquid generating apparatus 1 according to embodiment 1 except that the number of the electrodes 11 and 12 is different from that of the plurality of electrodes. The cleaning liquid generator 1 of embodiment 2 has a larger number of electrodes, and therefore the efficiency of generating electrolyzed water is higher than that of embodiment 1.

[ embodiment 3 of cleaning liquid producing apparatus ]

Fig. 3 shows a schematic configuration of the cleaning liquid generating apparatus according to embodiment 3. The basic configuration of embodiment 3 is substantially the same as that of embodiment 1, and therefore, the description thereof will be omitted, and only the portions different from embodiment 1 will be described below. The cleaning liquid generating apparatus 1 of embodiment 3 includes a polarity switcher 6 (polarity switching means) for switching (inverting) the polarities of the electrode portions 11 and 12. The electrode portions 11 and 12 are electrically connected to the power supply 7 via the polarity switcher 6. The polarity switcher 6 is configured to automatically and repeatedly switch the polarities of the electrode portions 11 and 12 at predetermined timings (times set in advance by a timer). That is, the polarities of the electrode portions 11 and 12 can be automatically and repeatedly switched by using the polarity switcher 6 every time a predetermined time elapses.

The electrode portion 11 and the electrode portion 12 are always of opposite polarities. That is, when the electrode portion 11 functions as an anode (+ pole), the electrode portion 12 functions as a cathode (-pole), whereas when the electrode portion 11 functions as a cathode (-pole), the electrode portion 12 functions as an anode (+ pole). For example, when a timing of several minutes, hours, or days is set as the set time, the electrode portion functioning as the anode (+ pole) functions as the cathode (-pole) when the set timing comes, and the electrode portion functioning as the cathode (-pole) functions as the anode (+ pole) when the set timing comes. That is, the electrode portion 11 alternately functions as an anode (+ pole) and a cathode (-pole), and the electrode portion 12 alternately functions as a cathode (-pole) and an anode (+ pole).

By providing such a polarity switcher 6 in the cleaning liquid generating apparatus 1, it is possible to suppress fouling of the liquid modifying portion 5, particularly fouling of the electrodes 11 and 12, and to remove fouling adhering to the inside of the cylindrical flow path 5 a. In order to remove the fallen dirt, as shown in fig. 3, a filter 19 for removing the dirt discharged from the cylindrical flow path 5a may be provided in the cleaning liquid generation apparatus 1. This prevents foreign matter from being mixed into the generated cleaning liquid. The polarity switching by the polarity switcher 6 may be automatic as described above, or may be manual at an arbitrary timing.

[ embodiment 1 of cleaning/coating liquid producing apparatus 2]

The cleaning liquid generating apparatus 1 according to embodiments 1 to 3 is used for generating a cleaning liquid for an outer surface of a structure, a coated surface of a moving body such as an automobile or a train, or the like. The cleaning-coating liquid forming apparatus 2 according to embodiment 1 shown in fig. 4 has a function of cleaning and coating the cleaning surface thereof. The basic configuration of the cleaning-coating liquid producing apparatus 2 according to embodiment 1 is substantially the same as that of embodiment 1, and therefore, the description thereof will be omitted, and only the differences from embodiment 1 will be described below.

The coating composition generator 8 is connected to a flow path 32 connected to the discharge port of the pump 17 of the cleaning-coating liquid producing apparatus 2. As described later, the coating composition generator 8 stores a ceramic composite 88 (see fig. 6) in a cylindrical body, and causes a coating component to permeate from the ceramic composite 88 to a cleaning liquid (see patent document 1). The cleaning-coating liquid producing apparatus 2 according to embodiment 1 is pressurized and pumped by a pump 17 to supply a liquid (e.g., public tap water) as a source liquid of the cleaning-coating liquid. The liquid pumped by the pump passes through the inside of a cylindrical body (cylinder) of the coating composition generator 8, then passes through the flow paths 32 and 33 and the inside of the cylindrical flow path 5a, and passes through the flow paths 34 and 35 and the tank 15, and repeatedly passes through the coating composition generator 8 and the cylindrical flow path 5 a.

When the liquid is pumped and circulated repeatedly through the passages 31 to 35 in this manner, the liquid repeatedly passes through the inside of the coating composition generator 8 and the inside of the cylindrical flow passage 5a, and in this process, the liquid (for example, tap water) serving as the source liquid is changed to the cleaning-coating liquid. That is, a liquid having both functions of washing and coating is generated. The liquid (for example, tap water) serving as a source liquid of the cleaning-coating liquid is repeatedly made to flow through the tubular flow path 5a, thereby providing the liquid with a cleaning function. Further, when a liquid (for example, tap water) as a source liquid of the cleaning-coating liquid is repeatedly passed through the coating composition generator 8 (gas cylinder device), the liquid is repeatedly exposed to the coating composition in the coating composition generator 8 (gas cylinder device) in this process, and the liquid as the source liquid such as tap water is provided with a coating function.

Therefore, a "cleaning-coating liquid" having both a cleaning function and a coating function is generated by repeatedly flowing a liquid such as tap water as a source liquid through the coating composition generator 8 and the tubular flow path 5 a. In the present embodiment, as shown in fig. 4, the coating composition generator 8 is disposed on the upstream side and the cylindrical flow path 5a is disposed on the downstream side, or conversely, the cylindrical flow path 5a may be disposed on the upstream side and the coating composition generator 8 may be disposed on the downstream side and both may be connected by the connecting flow paths 34 to 35. The cleaning-coating liquid generated by the cleaning-coating liquid generating apparatus 2 is stored in a tank 15, and is sprayed onto a cleaning object such as a vehicle body or an outer wall of a building by a liquid spraying apparatus provided with a pump, a spray nozzle, or the like.

The object to be sprayed with the cleaning-coating liquid is not particularly limited, and specific examples thereof include bodies of various moving bodies such as vehicles, ships, and airplanes, exterior walls of permanent structures such as buildings, walls exposed to outside air, surface portions of various structures or devices such as various electric appliances installed outdoors, and windows having a transparent portion made of glass or transparent resin. The cleaning-coating liquid generated by the cleaning-coating liquid generating apparatus 2 is a cleaning-coating liquid used for cleaning a window provided in various moving bodies such as vehicles, ships, and airplanes, and in other words, can be used as a window cleaning liquid having a coating function. In the cleaning-coating liquid generating apparatus of the present embodiment, when only the cleaning liquid is generated, the manual switching valve 23 is connected to the outlet of the pump 17 and the liquid flows through the bypass passage 32a, the cleaning liquid is generated because the circulating water does not pass through the coating composition generator 8. The check valve 24 connected to the outlet side of the coating composition generator 8 is used to prevent the washing liquid from flowing backward in the coating composition generator 8 when the washing liquid is generated.

[ modification of the cylindrical flow passage 5a ]

Fig. 5 is a cross-sectional view showing a modification of the cylindrical flow path 5 a. The cylindrical flow path 5a of embodiments 1 to 3 has a linear central axis, but is not limited to this shape. The tubular flow path 5a of this modification is formed in a U-shape as a whole, and has straight central axes at both ends and a middle portion connected to a C-shaped curved pipe 5 b. The C-shaped curved tube 5b has a straight center line and two ends bent at 90 degrees. Therefore, the center line of the cylindrical flow path 5a on the liquid inlet 21 side is parallel to the center line of the cylindrical flow path 5a on the liquid outlet side. Therefore, the cleaning liquid generating apparatus according to embodiment 4 has a compact structure. In addition, since the interval between the 1 st electrode portion 11 and the 2 nd electrode portion 12 can be made long, there is an advantage that the cylindrical flow path 5a becomes compact. In this example, although synthetic resin pipes having different diameters are used for the tubular flow path 5a and the intermediate curved pipe 5b, the pipes may be curved pipes formed of the same material. In addition, the center line of the central portion of the curved pipe 5b is a straight line, and both ends are bent at 90 degrees. In the modification, the central axis of the cylindrical flow path 5a in embodiments 1 to 3 is a straight line from the center line of the cylindrical flow path 5a, and therefore the central portion is also a straight line. Although not shown, the central axis of the cylindrical flow path 5a may be circular arc shaped or V, C shaped.

[ Structure of coating composition Generator provided in washing-coating liquid Generation apparatus ]

Next, a specific embodiment of the "coating composition generator 8" (see fig. 4) constituting the cleaning-coating liquid generating apparatus 2 will be described with reference to fig. 6 and 7. Further, the basic structure of the "coating composition generator 8" is a well-known technique (Japanese patent laid-open No. 2011-. The coating composition generator 8 is a gas cylinder type device that generates a slightly water-soluble silicon oxide solution. Fig. 6 is a schematic cross-sectional view of the coating composition generator 8, and in fig. 6, a so-called transverse coating composition, which is a type in which the gas cylinder device 81 is used in a transverse arrangement, is generated. The air cylinder 83 constituting the air cylinder device 81 is a cylindrical body with both closed ends, and filters 86 and 87 are disposed in the vicinity of both ends inside the air cylinder.

Between these filters 86, 87, a block-shaped ceramic composite 88 is provided, and the ceramic composite 88 is preferably a granular body. The ceramic composite 88 corresponds to a "coating composition". The amount of the ceramic composite 88, that is, the filling rate of the space in the gas cylinder 83 is arbitrary, but from the viewpoint of the stirring efficiency, it is preferably 20% to 80%, more preferably 30% to 70%, and most preferably about 50%. The filters 86 and 87 are preferably screens to such an extent that the particles of the ceramic composite 88 do not pass through. The basic plasticity of the ceramic composite 88 is known (japanese patent No. 4,012,930).

The coating composition generator 8 has a liquid inlet 91 and a liquid outlet 92 at both ends, where the liquid inlet 91 is formed at one end of the liquid ejection tube 82. That is, the liquid discharge pipe 82 is provided at one end of the cylindrical body 83, and is constituted by a pipe penetrating the filter 86 located in the vicinity of the one end side, and the pipe extends to the vicinity of the filter 87 at the other end of the cylindrical body 83. The liquid flowing out of the liquid outlet 92 flows into the liquid reforming portion 5 through the flow path 32. The liquid discharge pipe 82 has the liquid inlet 91 and the closed tip as described above, and has one or more liquid discharge holes 85 in the side wall of the pipe. As shown in fig. 7 (a), when the liquid ejection holes 85 eject the liquid from the liquid ejection pipe 82 at an angle in the radial direction, the ejected liquid rotates in the cylindrical body 83 to maintain the particles of the ceramic composite 88 in a suspended state. The ceramic composite 88 is mixed and stirred by the rotation of the ceramic composite 88, thereby promoting the elution of the coating component.

When, for example, public tap water is introduced from the liquid inlet 91 of the liquid discharge pipe 82, the coating composition generator 8 rotates the tap water discharged from the liquid discharge holes 85 to suspend the particles of the ceramic composite 88 satisfactorily. The particles of the ceramic composite 88 used in the present embodiment are composed of a ceramic composite obtained by sintering tourmaline and a high-molecular initial condensation product of silica, and when the particles are dispersed in tap water and a mechanical stimulus is applied, silica is eluted to obtain a slightly water-soluble silica solution. Further, by repeatedly flowing the slightly water-soluble silica solution to the coating composition generator 8, a concentrated slightly water-soluble silica solution can be obtained.

[ other cleaning/coating liquid producing apparatus ]

In the cleaning-coating liquid producing apparatus 2 according to embodiment 1 shown in fig. 4, 1 electrode portion 11 functioning as an anode (+ pole) and 1 electrode portion 12 functioning as a cathode (-pole) are provided, similarly to the liquid modifying portion 5 according to embodiment 1 shown in fig. 1. However, as shown in fig. 2, the electrode portions 11 and 12 may be provided with 3 electrodes arranged in parallel with each other. The 3 electrode portions 11 and 12 functioning as anodes (+ electrodes) are electrically connected to the positive electrode (+ electrodes) of the power supply 7 via electric wires, respectively. The 3 electrode portions functioning as cathodes (-poles) were electrically connected to the negative electrodes (-poles) of the power supply via electric wires, respectively. As described above, the number of electrode portions is not limited to 1 as illustrated in fig. 4, and may be a plurality of electrode portions as illustrated in fig. 2.

In the cleaning-coating liquid forming apparatus according to embodiment 1 described with reference to fig. 4, the polarities of the 1 st electrode portion 11 and the 2 nd electrode portion 12 are not switched. However, similarly to embodiment 3 (fig. 3) shown in fig. 3, a polarity switcher (polarity switching means) for switching the polarities of the 1 st electrode portion 11 and the 2 nd electrode portion 12 may be provided. The electrode portions 11 and 12 are electrically connected to a power supply via a polarity switcher. The polarity switcher is configured to automatically and repeatedly switch the polarities of the electrode portion 11 and the electrode portion 12 at predetermined timings. That is, the polarities of the electrode portions 11 and 12 can be automatically switched repeatedly every time a predetermined time elapses by using the polarity switch, similarly to the polarity switch 6 described with reference to fig. 3.

Example 1

Hereinafter, examples of the present invention will be described with reference to experimental examples. The cleaning liquid generating apparatus used in the experiment had the same results as the apparatus of embodiment 1 shown in fig. 1. The specific specifications of the apparatus and power supply used in the experiment are as follows.

(specification of cleaning liquid generating apparatus)

■ size of cylindrical flow path: 18mm of outer diameter, 13mm of inner diameter and 300mm of total length

■ Material of cylindrical flow passage: pipe made of hard vinyl chloride

■ electrode bar of anode: copper bar with diameter of 2mm and length of 100mm

■ electrode bar of cathode: copper bar with diameter of 2mm and length of 100mm

■ spacing of anode from cathode: 100mm

(Specification of Power supply)

■ AC 100V: (AC 100-120V, maximum 2A) input power supply

■ voltage between cathode and anode: 5 ~ 30V (voltage variable through variable resistor)

A cleaning liquid generating device (embodiment 1) and a power supply of the above-described specifications were prepared, and the cylindrical flow path 5a was positioned so that the liquid inlet 21 and the liquid outlet 22 of the liquid reforming section 5 were directed upward in the vertical direction. Then, "public tap water (narrow city, yu prefecture, Saitama, japan)" which is a liquid to be a source liquid of the cleaning liquid to be generated is prepared, and the cleaning liquid is generated using the cleaning liquid generating apparatus (embodiment 1) of the above-described specification. At this time, with the liquid flowing inside the liquid modifying unit 5, the switch of the power supply 7 is turned on, and a voltage is applied to the liquid (the liquid flowing inside the cylindrical flow path 5a) in contact with the 1 st electrode 11 and the 2 nd electrode 12.

[ procedure of experiment for confirming cleaning effect ]

Thus, the cleaning liquid produced was set as example 1. In addition, public tap water (tap water from narrow mountain city, yu prefecture, Saitama, japan) was used as comparative example 1. The procedure of the confirmation experiment using the cleaning liquid (example 1) and the tap water (comparative example 1) is schematically shown in fig. 8 (a) to 8 (b). As shown in fig. 8 (a), initially, a white plate was prepared in which an outer panel used for an FRP automobile was coated with a general white paint. The white plate has a size of 50cm in length and 100cm in width. The white plate is equally divided into 2 regions on the left and right sides by a boundary line (middle line) disposed in the middle. The left side of the panel was set as the experimental region for example 1 (region cleaned with cleaning liquid), and the right side of the panel was set as the experimental region for comparative example (region cleaned with public tap water).

Next, as shown in fig. 8 (b), the colored salad oil for cooking is applied to the entire surface of the white board using the brush. As a result, a uniform oil film was formed on the entire surface of the white plate. In this experiment, the oil film was set to be greasy. Next, as shown in fig. 8 (c), the cleaning liquid was sprayed on the experimental area of the example using a sprayer, and the tap water was sprayed on the experimental area of the comparative example, so that the left and right areas contaminated with oil were washed with the liquid (cleaning liquid). In this case, the amount of the liquid (cleaning liquid) for washing the oil stains is equal so that there is no difference between the left and right regions. Next, as shown in fig. 8 (d), the degree of dropping of the oil stain (oil film) cleaned with the cleaning liquid (example 1) and the degree of dropping of the oil stain (oil film) cleaned with tap water (comparative example 1) were visually observed. In other words, the degree of the falling of the oil stains in the example area using the cleaning liquid and the degree of the falling of the oil stains in the comparative example area using the tap water were visually observed in comparison. The results are shown in table 1 below.

[ Table 1]

TABLE 1

	Kinds of liquid for cleaning	Evaluation of cleaning Effect
			Example 1	Cleaning liquid generated by the cleaning liquid generating device	○
Comparative example 1	Water (W)	×

[ evaluation criteria for cleaning Effect ]

The degree of dirt falling from the surface of the plate (cleaning effect) was evaluated at the 3-stage of ≈ Δ ×.

O: the examples were compared with the comparative examples and were cleaned and indicated as "O".

And (delta): the case where the degree of falling of dirt was equal when the examples and comparative examples were compared was observed is indicated by Δ.

X: the difference in the degree of falling of the dirt was marked by X when the examples and comparative examples were compared.

That is, the cleaning liquid generating apparatus according to the present invention can provide a liquid such as water with an excellent cleaning function without using a cleaning agent or the like. Further, according to the experimental results, when a liquid containing a washing agent is used as a liquid to be a source liquid of a cleaning liquid to be generated, the liquid containing the washing agent can exhibit more excellent cleaning effect.

Example 2

An experiment was conducted to confirm the dual functions of the cleaning effect and the coating effect of the cleaning-coating liquid, by generating the cleaning-coating liquid using the cleaning-coating liquid generating apparatus. The cleaning-coating liquid generating apparatus used for the experiment has the same configuration as that of the apparatus of embodiment 1 shown in fig. 4. The specific specifications of the apparatus and power supply used in the experiment were the same as those of example 1. A cleaning-coating liquid generating apparatus and a power supply of the above specifications were prepared. Further, a "common tap water" is prepared as a liquid to be a source liquid of the cleaning-coating liquid to be generated, and the cleaning-coating liquid is generated using the cleaning-coating liquid generating apparatus. In this generation, the switch of the power supply 7 is turned on in a state where the liquid flows in the cylindrical flow path 5a, and a voltage is applied to the liquid (the liquid flowing in the cylindrical flow path 5a) in contact with 2 electrode portions, i.e., the electrode portion 11 and the electrode portion 12. Thus, the cleaning-coating liquid thus produced was defined as example 2. In addition, tap water (untreated tap water to which no voltage was applied or the like) was used as comparative example 2. The experimental conditions of the washing water generating apparatus were the same as in example 1.

[ procedure of experiment for confirming cleaning Effect ]

The same experiment as in example 1 was carried out using the flow of the cleaning effect confirmation experiment using the cleaning-coating liquid (example 2) and the tap water (comparative example 2). As a result, as shown in table 2 described later, the same effective cleaning effect as in example 1 was obtained for the cleaning-coating liquid produced by the cleaning-coating liquid producing apparatus shown in fig. 4.

[ procedure of experiment for confirming coating effect ]

Fig. 9 schematically shows the flow of the coating effect confirmation experiment using the cleaning liquid (example 2) and the tap water (comparative example 2). As shown in fig. 9 (a), a white plate similar to that of example 1 was prepared. Next, as shown in fig. 9 (b), the cleaning-coating liquid was applied to the experimental region for examples on the left side of the white plate using bristles to form a liquid-derived coating. The experimental area for the comparative example on the right side of the white plate was coated with only tap water. Then, the process stands by until the applied liquids are dried.

Next, as shown in fig. 9 (c), the entire surface of the white plate was coated with the edible salad oil using brush bristles. As a result, a uniform oil film was formed on the entire surface of the white plate. In the experiment, the oil film was treated as oil stain. Next, as shown in fig. 9 (d), tap water was sprayed to the experimental area of the example and the experimental area of the comparative example using a sprayer, and the left and right areas contaminated with oil were washed with tap water. In this case, the same amount of tap water is used to wash the oil stains so that there is no difference between the left and right regions.

Next, the degree of dropping of the oil stain (oil film) by the tap water in the example area and the degree of dropping of the oil stain (oil film) by the tap water in the comparative example area were visually observed. In other words, the degree of the oil stain falling off from the example area to which the cleaning-coating liquid of the present invention was applied and the degree of the oil stain falling off from the comparative example area to which only tap water was applied were visually observed in comparison. The results are shown in table 2 below.

[ Table 2]

TABLE 2

[ evaluation criteria for cleaning Effect ]

The degree of dirt falling from the surface of the plate (cleaning effect) was evaluated at the 3-stage of ≈ Δ ×.

O: comparing the examples with the comparative examples, the cleaned article is marked as "O".

And (delta): when the degree of falling of dirt was observed to be equivalent in comparison with the examples and comparative examples, it is marked by Δ.

X: when the examples and comparative examples were compared and observed, the inferior degree of falling of the dirt was indicated by ×.

[ evaluation criteria for coating Effect ]

The degree of dirt falling from the surface of the plate (coating effect) was evaluated at the 3-stage of ≈ Δ ×.

O: when the examples and comparative examples were compared and observed, the side from which dirt fell clean was marked as O.

And (delta): when the examples and comparative examples were compared and observed, the case where the degree of falling of dirt was equivalent was indicated by Δ.

X: when the examples and comparative examples were compared and observed, the inferior degree of falling of the dirt was indicated by ×.

That is, according to the cleaning-coating liquid producing apparatus of the present invention, it is confirmed that not only the cleaning liquid but also not only the coating liquid can produce a liquid having both the cleaning function and the coating function. Further, it was confirmed that a liquid such as water can be provided with a cleaning function and a coating function without using a detergent or the like. In addition, when a cleaning liquid is used as a liquid to be a source liquid of a cleaning-coating liquid to be generated, the cleaning liquid can exhibit a more excellent cleaning effect and also can have a coating function.

Example 3

An experiment was performed to confirm the effect of inhibiting fouling of the liquid modifying portion by generating a cleaning liquid using a cleaning liquid generating apparatus provided with a polarity switching portion. The cleaning liquid generating apparatus used in the experiment has the same configuration as that of the apparatus of embodiment 3 shown in fig. 3. The specific specification of the cleaning liquid generator (cylindrical flow path) used in the experiment and the power supply were the same as in example 1. "tap water" is prepared as a liquid to be a source liquid of the cleaning liquid to be generated, and the cleaning liquid is generated by using the cleaning liquid generating apparatus (the apparatus according to embodiment 3) of the above-described specification. At this time, in a state where the liquid flows in the tubular flow path 5a, the switch of the power supply 7 is turned on, and a voltage is applied to the liquid (the liquid flowing in the liquid modifying unit 5) contacted by the 2 electrode portions 11 and 12.

The circulation of the liquid and the application of the voltage in the cleaning liquid generating apparatus (apparatus according to embodiment 3) were continued for 30 days. That is, the same liquid was circulated for 30 consecutive days in a state where a voltage was applied through the electrode portions 11, 12. Further, in the course of the liquid circulation (generation of the cleaning liquid) over 30 days, the polarities of the 1 st electrode portion 11 and the 2 nd electrode portion 12 were switched at the same time at the frequency shown in table 3. The switching of the polarity takes place simultaneously and automatically. After the same liquid was circulated for 30 consecutive days, the degree of fouling in the interior of the liquid reforming section 5 was confirmed. The results are shown in table 3 below.

[ Table 3]

TABLE 3

[ evaluation criteria for degree of fouling in liquid reforming part ]

The degree of fouling in the liquid reforming section was evaluated at 4 stages a to D.

A: no change was observed compared to before the start of the experiment and no fouling was visible.

B: dirt such as scale was slightly visible.

C: a portion of the dirt is visible.

D: the whole surface is dirty.

That is, it was confirmed that fouling of the liquid modifying unit 5 in the cleaning liquid generating apparatus 1 can be suppressed by repeatedly switching the polarities 6 of the 1 st electrode portion 11 and the 2 nd electrode portion 12 by the polarity switcher.

[ other embodiments ]

The cylindrical flow path 5a of the liquid modifying section 5 is cylindrical and has a circular hole therein, but is not limited thereto, and the cylindrical flow path 5a may be a rectangular pipe, a hexagonal pipe, or the like. Therefore, the cylindrical flow path according to the present invention is not limited to a cylinder. The cross-sectional shapes of the 1 st electrode portion 11 and the 2 nd electrode portion 12 are circular, but rectangular or elliptical shapes are also possible, and therefore the rod-like shape in the present invention does not mean that the cross-sectional shape is only circular.

Description of the reference numerals

Cleaning liquid generating apparatus

1: cleaning-coating liquid producing apparatus

5 liquid modifying part

5a cylindrical flow passage

Polarity switcher (polarity switching unit)

7: power supply

8 applicator for coating composition

11: 1 st electrode part

12: 2 nd electrode part

15: pot

17: pump

19: filter

1: liquid inlet

22 liquid outlet

23 switching valve

24 check valve

31. 32, 33, 34, 35 channels

23a bypass flow path

81 inflator

82 water jet pipe

83 cylinder (inflator)

85: the spout

86. 87: filter (Screen)

88 ceramic composite (coating composition)

91 water inlet

92 water outlet.