JP2009005747A - Washing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and compact washing apparatus capable of attaining a water saving effect and a favorable washing performance. <P>SOLUTION: This washing apparatus is provided with an electrolytic treatment means 20 having at least a pair of electrodes 30 and 31, a porous spacer 34 capable of collecting scales in water as a scale recovery material of an insulator, and a conductor 32 having an energizing relation only with the first electrode 30 and collecting interfacial active agent in the water; executes a scale removal process for making the conductor a negative potential by the electrode 30 of the electrolytic treatment means 20 and collecting scales contained in water supplied to a washing tub 3 into a spacer 34; and executes an interfacial active agent removal process for making the conductor a positive potential or the negative potential and collecting the interfacial active agent contained in the water used as wash water in the washing process in the washing tub 3, in the conductor 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cleaning apparatus that cleans an object to be cleaned in a cleaning tank, and more particularly to a cleaning apparatus that can obtain good cleaning performance while saving water used for cleaning the object to be cleaned.

  Conventionally, washing machines, such as dishwashers that wash dishes, have been developed to meet consumer needs such as energy saving, noise prevention, and compactness, and have become popular not only in Japan but also overseas. It is a high product. In recent years, products with a high water-saving effect that reduce the amount of water used for washing dishes are drawing attention, and products having a water-saving function are being developed in competition. As one of the products, for example, a product that reduces the rinsing process by using strong acid water or strong alkaline water instead of a surfactant as washing water has been developed (for example, see Patent Document 1).

In addition, in dishwashers having a drying function, products having a function of removing scale components such as silica, calcium, and magnesium contained in tap water so that scale components do not adhere to tableware have been developed (for example, , See Patent Document 2).
Japanese Patent Publication No. 2003-52605 Japanese Patent No. 3785298

  However, in order to realize both the water saving and the scale removal, it is necessary to combine a plurality of devices, which increases the cost, increases the size of the device, and complicates the control operation. .

  The present invention has been made to solve the conventional technical problem, and an object thereof is to provide a low-cost and compact cleaning apparatus that can realize water saving and scale removal.

  The cleaning device of the present invention cleans an object to be cleaned in a cleaning tank, and is energized only with at least a pair of electrodes, an insulator scale recovery material capable of collecting scale in water, and only the first electrode. And an electrolysis means having a conductor capable of collecting a surfactant in water, and the first electrode of the electrolysis means makes the conductor a negative potential, and the water supplied to the cleaning tank The scale removal treatment step for collecting the contained scale in the scale recovery material is performed, and the surfactant contained in the water used as the washing water in the washing step in the washing tank is set to the positive potential or the negative potential. A surfactant removing process step for collecting the conductor is performed.

  The cleaning device of the invention of claim 2 is characterized in that the rinsing step in the cleaning tank is performed with the water treated in the surfactant removing treatment step in the above invention.

  The cleaning apparatus of the invention of claim 3 performs the water supply and the scale removal treatment process after discharging the water treated in the surfactant removal treatment process in the invention of claim 1, and in the scale removal treatment process The rinsing process in the washing tank is performed with the treated water.

  A cleaning device according to a fourth aspect of the present invention is the water treated in the surfactant removal treatment step in a state where the electric conductor of the electrolytic treatment means is at a positive potential in the invention of any one of the first to third aspects. Or, after the water used in the rinsing process is circulated through the conductor, the scale peeling process is performed.

  A cleaning apparatus according to a fifth aspect of the present invention is characterized in that, in the invention according to any one of the first to third aspects, the electrolytic treatment means includes a degassing means.

  According to the cleaning apparatus of the present invention, at least a pair of electrodes, an insulator scale recovery material capable of collecting scales in water, and the first electrode alone are energized to collect the surfactant in water. A scale removing process comprising: an electrolytic treatment means including a conductor; and the first electrode of the electrolytic treatment means sets the conductor to a negative potential and collects the scale contained in the water supplied to the cleaning tank in the scale recovery material. Execute the surfactant removal process step to collect the surfactant contained in the water used as the cleaning water in the cleaning process in the cleaning tank while collecting the surfactant in the cleaning tank Therefore, in the scale removal processing step, the scale can be collected in the scale recovery material and the scale can be removed from the water supplied to the cleaning tank.

  In particular, the scale recovery material is downstream of the flow path of the conductor, interposed between the conductor and the second electrode, and the conductor is set to a negative potential by the first electrode in the scale removal processing step. Then, the scale deposited on the second electrode side of the conductor can be efficiently collected with the scale recovery material.

  Further, in the surfactant treatment step, by setting the conductor to a positive potential, it is possible to collect the surfactant charged with a negative potential and the surfactant containing the dirt component surrounded by the surfactant in the conductor. . Further, by making the conductor negative potential in the surfactant treatment step, it is possible to collect the surfactant containing the surfactant charged with a positive potential and the dirt component surrounded by the surfactant in the conductor. it can. Further, the active oxygen species generated by the electrolytic treatment can decompose and remove the surfactant, the soil component, and the like, and the water to be treated can be sterilized. Therefore, the water treated in the surfactant treatment step does not contain the surfactant and the soil component, and can be reused for the next washing or rinsing. Thereby, the amount of water supplied to the cleaning device can be remarkably reduced, and efficient water saving can be realized.

  In general, by providing the above-described electrolytic treatment means as in the present invention, it is possible to realize both water saving and scale removal, so that high-performance cleaning can be achieved while avoiding an increase in cost and size of the apparatus as much as possible. A device can be obtained.

  Further, the water used for cleaning the object to be cleaned is used for rinsing the object to be cleaned by executing the rinsing process in the cleaning tank with the water treated in the surfactant removing process as in the invention of claim 2 Therefore, the amount of water introduced into the cleaning device can be significantly reduced, and effective water saving can be realized.

  Furthermore, after discharging the water treated in the surfactant removing treatment step as in claim 3 in the invention described in claim 1, the water supply and the scale removing treatment step are executed, and the water is treated in the scale removing treatment step. By executing the rinsing step in the cleaning tank with water, it becomes possible to reliably rinse the object to be cleaned with the water newly introduced into the cleaning apparatus and scaled.

  Further, in each of the above inventions, the water treated in the surfactant removing treatment process or the water used in the rinsing process is conducted with the conductor of the electrolytic treatment means at a positive potential as in the invention of claim 4. Since the scale peeling process is performed after being distributed to the body, the scale collected in the scale collection material can be detached and discharged by the scale peeling process. The inconvenience of clogging can be eliminated as much as possible. Thereby, the maintenance property can be improved.

  Furthermore, if the electrolytic treatment means includes a gas venting means as in the invention of claim 5, the gas generated by the electrolytic treatment can be discharged. Thereby, the problem that gas accumulates in the electrolytic treatment means can be solved, and safety can be ensured.

  Hereinafter, a cleaning apparatus according to an embodiment of the present invention will be described by taking a dishwasher for cleaning tableware as an example.

  FIG. 1 is a schematic configuration diagram showing an embodiment when the cleaning device of the present invention is applied to a dishwasher 1 for cleaning dishes and the like. The tableware washing machine 1 in FIG. 1 includes a cleaning tank 3 in a main body 2 constituted by a box-shaped outer frame, and cleans an object to be cleaned such as tableware in the cleaning tank 3. The dishwasher 1 has a function of cleaning and rinsing the object to be cleaned.

  A dish washing basket 5 is detachably disposed in the washing tub 3, and below it is sprayed with washing water or rinsing water into the tableware (hereinafter referred to as an object to be washed) housed in the basket 5. The nozzle 6 for performing this is arrange | positioned, The several injection hole 7 which is an injection port of washing water or a rinse water is provided in the upper surface. In addition, a water storage section 8 is configured at the bottom of the cleaning tank 3. The water storage section 8 has an outlet 9 for taking out water from the cleaning tank 3 (water storage section 8), and the entire bottom of the cleaning tank 3 is inclined low toward the outlet 9. Further, a pipe 11 of a circulation circuit 10 through which washing water and rinsing water circulate is connected to the outlet 9, and one end of the pipe 11 is opened at the outlet 9.

  The circulation circuit 10 is configured by connecting the electrolytic treatment means 20, the pump P, and the valve device (three-way valve V) by piping. That is, the outflow pipe 14 of the electrolytic treatment means 20 is connected to the outlet 24 formed at the upper end of the electrolytic tank 22 of the electrolytic treatment means 20. The outflow pipe 14 extends from one end opened at the upper part in the electrolytic bath 22 of the electrolytic treatment means 20 to the outside of the electrolytic bath 22, and the other end is connected to the pump P.

  One pipe 15 connected to the outlet of the pump P is connected to the nozzle 6. Further, the other pipe 17 connected to the outlet of the pump P extends to the outside of the dishwasher 1 via the valve device 17V, and the water in the dishwasher 1 can be discharged from here to the outside. Yes. The pipes 15 and 17 are respectively provided with valve devices 15V and 17V for opening and closing the pipes 15 and 17, respectively. Further, the pipe 11 connected to the outlet 9 of the water storage section 8 of the cleaning tank 3 is connected to the three-way valve V. An inlet pipe 12 of the electrolytic treatment means 20 is connected to one outlet of the three-way valve V. On the other hand, a pipe 13 reaching the pump P is connected to the other outlet of the three-way valve V.

  Further, a water supply pipe 18 for supplying tap water or the like is connected to the middle part of the inflow pipe 12, and a water supply valve 18V for opening and closing the water supply pipe 18 is interposed in the water supply pipe 18. The tap water can be supplied from the water supply pipe 18 into the circulation circuit 10 by the opening / closing operation 18.

  On the other hand, the electrolytic treatment means 20 described above is for removing scale components, surfactants, and the like contained in the water by electrolytically treating the water circulated and supplied to the dishwasher 1. The electrolytic treatment means 20 includes an electrolytic cell 22 in which an electrolytic chamber 21 is configured, and a pair of mesh-like (mesh) electrodes 30 having water permeability are provided in the electrolytic cell 22 (electrolytic chamber 21). A first electrode) and an electrode 31 (second electrode); a conductor 32 that is located downstream of the flow path of the electrode 30 and that is energized by the electrode 30; and the conductor 32 and the other electrode A porous spacer 34 as a scale collection material having water permeability, which is an insulator interposed between the electrode 31 and the like, is provided. The electrodes 30 and 31 are connected to a DC power source 40 for energizing the electrodes 30 and 31.

  The electrolytic cell 22 is made of an insulating member such as glass or a resin material, and includes a container body 22A and lid members 22B and 22C that close the upper and lower openings of the container body 22. The lid member 22B that closes the upper opening of the container body 22 is formed with a through hole that penetrates the lid member 22B in the axial direction (vertical direction in FIG. 1). The through hole passes through the electrolytic chamber 21. It is set as the outflow port 24 for taking out treated water. Similarly to the lid member 22B, a through-hole penetrating in the axial direction (vertical direction in FIG. 1) is formed in the lid member 22C that closes the lower opening of the container body 22. The through-hole is formed in the electrolytic chamber 21. The inlet 23 is used to introduce water into the water.

  On the other hand, the electrodes 30 and 31 described above may be platinum (Pt), iridium (Ir), tantalum (Ta), palladium (Pd), simple substance such as titanium or stainless steel, or at least platinum (Pt), iridium (Ir), It is an insoluble electrode obtained by processing a conductor containing any of tantalum (Ta), palladium (Pd), titanium, and stainless steel into a mesh shape (network shape). The electrodes 30 and 31 are made of the same material. Specifically, the electrodes 30 and 31 of this embodiment are a mesh of a platinum-iridium-coated titanium electrode in which a titanium electrode is coated with an alloy composed of platinum and iridium. And what shall be processed so that the whole may show a disk shape shall be used. That is, each electrode 30 and 31 is processed into a mesh shape, thereby forming water-permeable electrodes through which water to be treated can flow. And the conductor 32 of a present Example is comprised from the porous body which processed the conductor containing platinum, carbon, titanium, or stainless steel into a mesh shape, a fiber form, a granular form, or a punching plate shape, for example. ing. The material of the conductor 32 is not limited to the above, and other materials may be used as the material.

  The conductor 32 is disposed in close contact with the upper surface of the electrode 30 on the downstream side of the flow path of the electrode 30. The conductor 32 has a structure in which no direct current is generated between the electrodes 30 and 31. Specifically, in this embodiment, at least the electrode 30 is formed so as not to come out of the conductor 32 in the cross-sectional direction of the electrolysis chamber 21 which is a flow path of the water to be treated. That is, since the electrode 30 is formed in a disk shape having an outer diameter substantially the same as the inner diameter of the container body 22A, the conductor 32 similarly has substantially the same cross section perpendicular to the flow path direction in which the water to be treated flows. As shown in the figure, it is formed in a disk shape having an outer diameter substantially the same as the inner diameter of the main body 22A. As described above, in this embodiment, the structure in which the electrode 6 does not come out of the conductor 32 in the cross-sectional direction of the flow path can avoid the inconvenience that the current is directly applied between the electrodes 30 and 31.

  The spacer 34 is in contact with the upper surface of the conductor 32 on the downstream side of the flow path of the conductor 32. That is, the spacer 34 is interposed between the conductor 32 and the electrode 31 located on the downstream side of the flow path. The spacer 34 is preferably a non-conductive stretchable porous body having a high porosity. Here, the porosity is a ratio of voids (air portions) existing inside the porous structure. Accordingly, the higher the porosity, the lower the density (bulk density) of the spacers 34 (rougher the eyes), and the lower the porosity, the higher the density of the spacers 34 (finer). In the present embodiment, a polymer non-woven fabric having water permeability, for example, a polyvinylidene chloride polymer such as polyester or saran (manufactured by Asahi Kasei), having a porosity of greater than 95% is used as the spacer 34. did.

  The spacer 34 is in contact with the upper surface of the conductor 32 and presses the conductor 32. As a result, the conductor 32 is compressed by the pressing force of the spacer 34, is pressed against the electrode 30, and is in close contact with the upper surface of the electrode 30. By bringing the conductor 32 into close contact with the electrode 30 in this way, the conductor 32 is electrically connected to the electrode 30 and charged to the same potential as the electrode 30.

  In particular, since the conductor 32 can be pressed and adhered to the upper surface of the electrode 30 on the downstream side of the flow path by the spacer 34, the contact resistance of the conductor 32 to the electrode 30 is reduced, and not only the surface of the conductor 32 is The whole can be a part of the electrode 30. In this embodiment, the conductor 32 is compressed by the spacer 34 to such an extent that the flow of the water to be treated is not hindered, and the conductor 32 and the electrode 30 are brought into close contact with each other, so that the contact resistance with the electrode 30 is suppressed as much as possible. And Thus, by suppressing the contact resistance with the electrode 30, the conductor 32 is easily energized.

  Furthermore, by providing the spacer 34, the surface of the conductor 32 that contacts the electrode 31 (that is, the upper surface in the present embodiment) can be changed from an uneven state to a flat state. That is, by flattening the upper surface of the conductor 32, the distance from the opposing electrode 31 is made uniform, and a current can flow uniformly through the conductor 32. When the contact surface between the conductor 32 and the electrode 31 is not flat, the distance between the opposing electrode 31 becomes non-uniform, and a large current flows locally in the shortest distance, causing deterioration of the conductor 32. Arise. Therefore, by flattening the upper surface of the conductor 32 as in the present embodiment, it is possible to eliminate the inconvenience of a large current flowing locally through the conductor 32 and improve the durability of the conductor 32.

  Further, the electrolytic treatment means 20 is provided with a degassing means 37 for discharging a gas (gas) such as hydrogen and oxygen generated at each of the electrodes 30 and 31 by electrolysis. As shown in FIG. 2, the gas venting means 37 of the present embodiment includes an air vent valve 37 </ b> V provided in the middle of the outflow pipe 14 connected to the outflow port 24. The air vent valve 37V is controlled to be opened and closed by, for example, a controller C described later. When the pressure in the electrolytic cell 22 rises to a predetermined high pressure, the air vent valve 37V is opened by the controller C and The gas accumulated in can be discharged to the outside from here.

  In the electrolytic treatment means 20 having the above configuration, the water to be treated from the inflow pipe 12 enters the electrolytic chamber 21 formed in the electrolytic tank 22 from the inlet 23 formed in the lid member 22C of the electrolytic tank 22, After sequentially passing through the electrode 30, the conductor 32, the spacer 34, and the electrode 31, it flows out to the outside through the outflow pipe 14 from the outflow port 24 formed in the lid member 22 </ b> B. At this time, when the pressure in the electrolytic cell 22 rises to a predetermined high pressure by the gas venting unit 37 described above, the gas generated in the electrodes 30 and 31 can be discharged to the outside. The inconvenience of gas accumulation can be solved beforehand. In particular, large bubbles having high viscosity can be discharged without any delay by the degassing means 37, so that the gas accumulation in the electrolytic processing means 20 can be surely eliminated and safety can be ensured.

  Further, the flow path of the water to be treated configured in the electrolysis chamber 21 is configured around the center of the surface of the conductor 32 on the electrode 30 side (the lower surface in this embodiment). Thereby, since the to-be-processed water can be distribute | circulated uniformly to the conductor 32, the process efficiency of to-be-processed water can be improved.

  In addition, although the gas venting means 37 of the present embodiment is composed of an air vent valve 37V provided in the middle of the outflow pipe 14 connected to the outflow port 24 (FIG. 2), the gas venting means of the present invention. 37 is not limited to the configuration of the embodiment, and any configuration is effective as long as the gas generated in the electrolytic treatment means 20 can be discharged to the outside of the dishwasher 1. For example, as shown in FIG. 3, an outlet 24A is formed on the side surface of the lid member 22B, a gas vent 24B is formed on the upper surface, and a gas vent valve 38V is provided on a gas vent pipe 38 connected to the gas vent 24B. The gas generated in the electrolytic treatment means 20 may be discharged, and the water that has passed through the electrolytic cell 22 may be taken out from the outflow pipe 14 connected to the outlet 24A.

  Note that the operation of the dishwasher 1 of this embodiment is controlled by the controller C. The controller C performs this operation such as operation of the pump P, energization of the electrodes 30 and 31, operation of the three-way valve V, opening and closing of each valve device (valve device 15V, valve device 17V, water supply valve 18V and air vent valve 37V). It is a control means which manages control of the dishwasher 1 of an example, and is comprised by the general purpose microcomputer.

  Next, the operation of the dishwasher 1 of this embodiment having the above configuration will be described with reference to FIG. FIG. 4 is a flowchart showing the processing operation of the controller C of this embodiment. First, when an object to be cleaned (tableware) is placed in the basket 5 by the user and stored in the cleaning tub 3 of the dishwasher 1, and the power of the dishwasher 1 is turned on, the controller C In step S100, the water supply valve 18V is opened, the water supply pipe 18 is opened, the electromagnetic valve 15V is opened to open the pipe 15, and the electromagnetic valve 17V is closed to close the pipe 17. Further, the controller C connects the pipe 13 and the inflow pipe 12 with the three-way valve V to block outflow of water to be treated from the outlet 9 of the water storage section 8 of the cleaning tank 3 to the outside of the cleaning tank 3.

  Further, the controller C starts the operation of the pump P at the same time as opening the water supply valve 18V in step S100, and moves to step S101 to execute the scale removal processing step. That is, the controller C applies a negative potential to the electrode 30 from the DC power supply 40 and applies a positive potential to the electrode 31. As a result, the conductor 32 is charged to the same negative potential as the electrode 30. At this time, the controller C applies a potential to each of the electrodes 30 and 31 with a high current value. For example, the electric potential is applied to each of the electrodes 30 and 31 with a high current value in the range from the current set value of the controller C of 60 mA (milliampere) or more to a value below the current at which the conductor 32 melts.

As described above, when a negative potential is applied to the electrode 30 and the conductor 32, and a positive potential is applied to the electrode 31, the electrode 30 and the conductor 32 on the upstream side of the flow path of water (treated water) become a cathode, The electrode 31 on the downstream side becomes an anode. That is, when the electrodes 30 and 31 are energized to the water to be treated in the electrolysis chamber 21,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
In the electrode 7 serving as the anode,
2H ₂ O → 4H ⁺ + O ² + 4e ⁻
Reaction occurs.

  On the other hand, by the operation of the pump P, the water to be treated (tap water) from the water supply source flows into the inflow pipe 12 of the electrolytic treatment means 20 through the water supply pipe 18, and the electrolytic chamber in the electrolytic cell 22 from the inlet 23. 21 is supplied.

  When the water to be treated is supplied from the inlet 23 to the electrolysis chamber 21 in the electrolytic cell 22, the electrode 30, the conductor 32, the spacer 34, and the electrode 31 in the electrolysis chamber 21 are immersed in the water to be treated. Become. Then, the water to be treated supplied to the electrolysis chamber 21 sequentially passes through the electrode 30, the conductor 32, the spacer 34 and the electrode 31, and finally the electrolytic treatment means 20 from the outflow pipe 14 connected to the outflow port 24. Leaks out of the water.

At this time, as shown in the above chemical formula, hydroxide ions (OH) are formed on the electrode 30 and the conductor 32 serving as the cathode, particularly on the surface of the conductor 32 serving as the cathode on the electrode 31 side (that is, the upper surface of the conductor 32). ^- ) Is generated. Since hydroxide ions are very strong bases, the periphery of the upper surface of the conductor 32 is locally alkaline. Thereby, the hardness component in to-be-processed water reacts with the said hydroxide ion, and turns into a salt. Specifically, ions such as calcium, magnesium, potassium, and silica, which are contained in the water to be treated and are the main scale components, precipitate as hardly soluble salts such as calcium hydroxide, calcium carbonate, and magnesium hydroxide. . When ions such as phosphorus, sulfur and zinc are contained in the water to be treated, calcium sulfate, calcium sulfite, calcium phosphate, zinc phosphate, zinc hydroxide, basic zinc carbonate and the like may be precipitated as salts. Note that some of the ions such as calcium, magnesium, potassium, and silica, which are scale components, are also directly deposited on the upper surface of the conductor 32 by electrodeposition.

  The deposited scale is captured by the spacer 34 located on the downstream side of the flow path of the conductor 32 and collected. That is, the scale deposited on the upper surface of the conductor 32 flows to the spacer 34 in contact with the upper surface of the conductor 32 due to the flow of the water to be treated, and adheres to the surface (lower surface) of the spacer 34 on the conductor 32 side. Then, it adheres to the spacer 34 so as to grow from there to the electrode 31 side. Thereby, since the scale deposited on the upper surface of the conductor 32 can be collected in the spacer 34, the scale can be removed from the water to be treated. Further, in the scale removal step, since the potential is applied to each of the electrodes 30 and 31 with a high current value by the controller C as described above, by supplying water to the electrolytic treatment means 20, The scale contained in the water can be positively deposited on the upper surface of the conductor 32 and efficiently collected by the spacer 34 in contact with the downstream side of the flow path.

  On the other hand, the water to be treated from which the scale has been removed reaches the nozzle 6 via the pump P and the pipe 15 from the outflow pipe 14, and is sprayed onto the object to be cleaned through the injection hole 7, and then the water storage section 8 at the bottom of the cleaning tank 3. Stored in. A detergent is previously added to the water storage unit 8 by a user, and the detergent and the water to be treated are mixed in the storage unit 8 to generate cleaning water. Here, the detergent is a detergent containing a surfactant. Since many surfactants are generally anionic, that is, those charged to a negative potential, in this embodiment, a description will be given assuming that a detergent containing an anionic surfactant is used.

  The controller C stops the energization of the electrodes 30 and 31 by the DC power source 40 when the water level of the cleaning water stored in the water storage section 8 in the cleaning tank 3 reaches a predetermined water level, and the electrolytic treatment means 20. The electrolysis of the water to be treated is stopped and the water supply valve 18 is closed to close the water supply pipe 18. Thereby, the water supply to the dishwasher 1 from the water supply piping 18 stops.

  Next, the controller C proceeds to the cleaning process in step S102 of FIG. In this cleaning process, the controller C controls the three-way valve V so that the pipe 11 and the pipe 13 communicate with each other, opens the valve device 15V to open the pipe 15, closes the valve device 17 and closes the pipe 17. To do. Thereby, the wash water stored in the water storage section 8 at the bottom of the cleaning tank 3 flows into the pipe 11 of the circulation circuit 10 from the outlet 9 and is sucked into the pump P via the three-way valve V and the pipe 13. It is discharged to the pipe 15 and sprayed from the spray hole 7 of the nozzle 6 toward the object to be cleaned. Since the detergent containing the anionic surfactant is added to the washing water sprayed on the object to be washed, the surface tension of the washing water is reduced by the surfactant, and the tableware The cleaning water enters not only the surface of the object to be cleaned, but also the grooves and gaps. And the stain | pollution | contamination component adhering to to-be-cleaned object adheres to the hydrophobic group of surfactant. As a result, the dirt component adhering to the object to be cleaned is surrounded by the surfactant molecules and solubilized, so that the dirt component is easily lifted off from the object to be cleaned. Thereby, the stain | pollution | contamination adhering with the washing water sprayed vigorously from the injection hole 7 is removed easily.

  After being sprayed on the object to be cleaned, the cleaning water returned to the water storage section 8 again flows into the piping 11 of the circulation circuit 10 from the outlet 9 and is sucked into the pump P via the three-way valve V and the piping 13. Then, the cycle of discharging to the pipe 15 and spraying from the spray hole 7 of the nozzle 6 toward the object to be cleaned is repeated. In the washing process, the detergent and the scale can be combined by using the water from which the scale is removed from the water to be treated (tap water) by the electrolytic treatment means 20 in the scale removal treatment process described above as the washing water. Since metal soap is reduced, the cleaning effect can be improved.

  And if the said washing | cleaning process is repeated for the predetermined time, the controller C will transfer to the surfactant removal process (a rinse process is included in a present Example) shown to FIG.4 S103. In the surfactant removal step, the controller C controls the three-way valve V so that the pipe 11 and the inflow pipe 12 communicate with each other, and opens the valve device 15V to open the pipe 15 in the same manner as the cleaning step. The valve device 17V is closed and the pipe 17 is closed. Thereby, the washing water in the water storage section 8 of the washing tank 3 (hereinafter referred to as water to be treated in this process) passes from the outlet 9 through the piping 11 of the circulation circuit 10 and the three-way valve V to the electrolytic treatment means 20. The inflow pipe 12 is supplied to the electrolysis chamber 21 in the electrolytic cell 22 from the inlet 23.

  When the water to be treated is supplied from the inlet 23 to the electrolysis chamber 21 in the electrolytic cell 22, the electrode 30, the conductor 32, the spacer 34, and the electrode 31 in the electrolysis chamber 21 are immersed in the water to be treated. Become. Then, the water to be treated supplied to the electrolysis chamber 21 sequentially passes through the electrode 30, the conductor 32, the spacer 34 and the electrode 31, and finally the electrolytic treatment means 20 from the outflow pipe 14 connected to the outflow port 24. Leaks out of the water.

  In the present embodiment, as described above, a detergent containing an anionic surfactant is used as the detergent. Therefore, the controller C performs the operations of the above valves (three-way valve V, valve device 15V, and valve device 17V). At the same time, a positive potential is applied to the electrode 30 by a DC power source, and a negative potential is applied to the electrode 31. Here, as shown in FIG. 6, the adsorbed current value differs between the surfactant and the scale. For example, when the water to be treated is treated by passing the water to be treated through the electrolytic treatment means 20 at a flow rate of 200 mL / min, the surfactant removal efficiency is 80% at a low current (for example, 60 mA). On the other hand, the scale removal efficiency is a remarkably low value of 0%. It can be confirmed that the scale is gradually removed by applying a high current (for example, 500 mA).

  On the other hand, by applying the potential to the electrodes 30 and 31 described above, the electrode 30 and the conductor 32 become an anode, and the electrode 31 becomes a cathode. At this time, the controller C applies a potential to each of the electrodes 30 and 31 at a relatively low current value so that the scale attached to the conductor 32 does not come out from the outlet 24 in the scale removal step described above. Accordingly, it is possible to prevent inconvenience that the scale collected in the spacer 34 in the scale removal step is discharged from the outlet 24 and is sprayed onto the object to be cleaned in the cleaning tank 3.

  Here, as described above, the surfactant contained in the detergent of this embodiment is attracted to the conductor 32 having a positive potential because it is charged to a negative potential. Further, the surfactant containing the dirt component surrounded by the surfactant is also attracted to the conductor 32. Accordingly, the surfactant and the soil component are electrostatically attracted or fixed to the conductor 32 positively and effectively.

Furthermore, when a potential is applied to the electrodes 30 and 31 as described above, electrolysis of water to be treated occurs. That is, when the water to be treated in the electrolysis chamber 21 is energized by the electrodes 30 and 31, the electrode 30 and the conductor 32 serving as an anode
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
In the electrode 7 serving as the cathode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
At the same time, the chloride ions contained in the water to be treated
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 30 and 31 are energized, HClO (hypochlorous acid) is generated. Furthermore, organic substances such as dirt components remaining in the water to be treated can be decomposed by hypochlorous acid, and various bacteria in the water to be treated can be sterilized. In this embodiment, it is assumed that HClO (hypochlorous acid) is generated by energizing the electrodes 30 and 31, but this is not limited to the hypochlorous acid, and electrolysis including active oxygen species by electrolytic treatment. It is sufficient if water is generated. For example, even if ozone is generated by electrolytic treatment, surfactants, detergents, dirt components, etc. are decomposed and germs in the water to be treated are sterilized. Is possible.

  And the to-be-processed water after surfactant, a detergent, and a stain | pollution | contamination component were removed in the electrolytic treatment means 20 as mentioned above reaches the nozzle 6 through the pump P and the piping 15 from the outflow piping 14, and as rinse water, It is injected from the injection hole 7 onto the object to be cleaned. As a result, the object to be cleaned is rinsed with the rinse water, and dirt and detergent attached to the object to be cleaned can be removed.

  The rinse water after rinsing the object to be washed again falls into the water storage section 8 and enters the piping 11 of the circulation circuit 10 from the drain port 9 and flows into the inflow piping 12 of the electrolytic treatment means 20 through the three-way valve V. Then, the contamination component is decomposed by the adsorption effect by the conductor 32 and hypochlorous acid generated by electrolysis from the inlet 23 to the electrolytic chamber 21 in the electrolytic cell 22, and the water to be treated is sterilized. Repeat cycle. In the surfactant treatment process, as described above, each electrode 30 is set at a relatively low current value by the controller C so that the scale adhering to the spacer 34 in the scale removal process does not come out from the outlet 24. , 31 is applied with electric potential, and by repeatedly passing the water to be treated through the electrolytic treatment means 20 as described above, it is possible to reliably remove the surfactant, dirt components and the like in the water to be treated. Therefore, the water to be treated treated in the surfactant treatment step does not contain the surfactant and the dirt component, and can be reused for the next washing or rinsing. Thereby, the amount of water supplied from the water supply source can be remarkably reduced, and efficient water saving can be realized.

  When the surfactant removal process is repeated for a predetermined time, the controller C proceeds to a drainage process (scale peeling process) shown in step S104 of FIG. In this drainage process, the controller C controls the three-way valve V so that the pipe 11 and the inflow pipe 12 communicate with each other, closes the valve device 15V to close the pipe 15, opens the valve device 17V, and opens the pipe 17 Open.

  Further, the controller C applies a positive potential to the electrode 30 from the DC power supply 40 and applies a negative potential to the electrode 31. The controller C applies a potential with a high current value to each of the electrodes 30 and 31 as in the scale removal step. For example, the electric potential is applied to each of the electrodes 30 and 31 with a high current value in the range from the current set value of the controller C of 60 mA (milliampere) or more to a value below the current at which the conductor 32 melts.

  As a result, the rinsing water in the storage section 8 of the cleaning tank 3 flows into the pipe 11, the three-way valve V, and the inflow pipe 12 of the electrolytic treatment means 20 from the outlet 9 and from the outlet 23 to the electrolytic chamber 21 in the electrolytic tank 22. To be supplied. The water to be treated supplied from the inflow port 23 to the electrolysis chamber 21 sequentially passes through the electrode 30, the conductor 32, the spacer 34, and the electrode 31, and is finally subjected to electrolytic treatment from the outflow pipe 14 connected to the outflow port 24. After flowing out of the means 20 and sucked into the pump P, it is discharged to the pipe 17 and discharged from the pipe 17 to the outside of the dishwasher 1.

  At this time, since the potential is applied to each of the electrodes 30 and 31 with a high current value by the controller C as described above, the electrode 30 and the conductor 32 charged to a positive potential, in particular, the conductor 32 serving as the anode. The water to be treated near the electrode 31 side surface (that is, the upper surface of the conductor 32) is acidic. When the acidic water to be treated flows to the spacer 34, the scale collected in the spacer 34 is dissolved, peeled off from the spacer 34, and the rinsing water to be passed through the outflow pipe 14 connected to the outlet 24. It will flow out of the electrolytic treatment means 20. Thereafter, the scale detached from the spacer 34 is discharged out of the dishwasher 1 from the pipe 17 together with the rinsing water (scale peeling step). In this way, the rinse water used for rinsing the object to be cleaned in the draining process is caused to flow to the electrolytic treatment means 20, the scale collected by the spacer 34 is peeled off from the spacer 34, and the dishwasher 1 is rinsed together with the rinse water. Since it can be discharged to the outside, the inconvenience of clogging the spacer 34 can be eliminated as much as possible. Thereby, the maintenance property can be improved.

  And when the said drainage process is performed and rinse water is discharged | emitted from the dishwasher 1, the controller C applies a positive potential to the electrode 30 with the DC power supply 40, and after applying a negative potential to the electrode 31, the electrode The energization to 30 and 31 is stopped, and the electrolysis of the water to be treated in the electrolytic treatment means 20 is stopped.

  As described above in detail, the dishwasher 1 according to the present embodiment includes the electrolytic treatment means 20 including the electrodes 30 and 31 and the conductor 32, and the electrode 32 of the electrolytic treatment means 20 causes the conductor 32 to have a negative potential. By collecting the scale contained in the water supplied to the cleaning tank 3 with the spacer 34 and removing the scale from the water, the adhesion of the scale to the object to be cleaned can be eliminated and good cleaning can be performed. Performance can be obtained.

  Furthermore, by making the electric conductor 32 have a positive potential by the electrode 30, the surfactant and the dirt component contained in the water used as the washing water in the washing process are collected by the electric conductor 32, and generated by electrolysis. The active oxygen species can decompose and remove the surfactant, detergent, and soil components, and can also sterilize the water to be treated. Moreover, since the water after the said process can be used for the rinse of a to-be-cleaned object, the quantity of the water introduce | transduced in a washing | cleaning apparatus can be reduced significantly and effective water saving can be implement | achieved.

  In particular, according to the present invention, scale removal and surfactant removal can be performed by the electrolytic treatment means 20, so that it is possible to achieve a water-saving effect in one device without combining a plurality of devices as in the prior art. Both of the cleaning effects can be improved.

  As a result, the entire apparatus can be made compact, and an increase in cost can be minimized. In addition, since the control operation is relatively simple as described above, it is possible to simplify the controller that performs control.

  In the present embodiment, in the drainage process (scale peeling process), the controller C applies a positive potential to the electrode 30 by the DC power source 40, applies a negative potential to the electrode 31, and high current to the electrodes 30, 31. The potential collected by the value is applied to peel off the scale collected in the spacer 34. In order to peel off the scale collected in the spacer 34 in this way, for example, the electrolytic treatment means 20 is subjected to normal processing. As a configuration that allows water to flow in the direction opposite to the direction of water flow, water is made to flow through the electrolytic treatment means 20 in a direction opposite to the normal direction of water flow, and the scale of the spacer 34 is peeled off by the flow of water to be treated. Alternatively, the electrolytic treatment means 20 is configured to be able to pass water from the lateral direction of the spacer 34, that is, the direction orthogonal to the water flow direction, and collected by the spacer 34 by the flow of this day-treated water. Was no problem as well as to peel off the scale.

  In particular, in the scale peeling step, by increasing the flow rate of the water to be treated that passes through the electrolytic treatment means 20, the scale collected in the spacer 34 is easily peeled off by the flow of the water to be treated, which is more effective. It becomes.

  Further, in Example 1 described above, only the water treated in the surfactant removal treatment process after use in the washing process was used as the rinse water for the washing object, but after the washing object was washed with the rinse water. In addition, water may be newly supplied from the water supply source as a finish for rinsing, and the water may be used as the final rinse water. Another processing operation of the dishwasher 1 in this case will be described with reference to FIG. FIG. 5 is a flowchart showing the processing operation of the controller C of this embodiment. Since the processing operation up to step S114 in FIG. 5 of the present embodiment is the same as the operation in step S104 in FIG.

  That is, when rinsing water is discharged from the dishwasher 1 in the draining process (scale peeling process) in step S114 in FIG. 5 (same as step S104 in FIG. 4), the controller C applies the positive power to the electrode 30 by the DC power source 40. After applying the potential, applying a negative potential to the electrode 31, stopping the energization of the electrodes 30, 31, and stopping the electrolysis of the water to be treated in the electrolytic treatment means 20, the process proceeds to step S115 in FIG. In step S115, the controller C opens the water supply valve 18V, opens the water supply pipe 18, opens the electromagnetic valve 15V, opens the pipe 15, closes the electromagnetic valve 17V, and closes the pipe 17. Further, the controller C connects the pipe 13 and the inflow pipe 12 with the three-way valve V to block outflow of water to be treated from the outlet 9 of the water storage section 8 of the cleaning tank 3 to the outside of the cleaning tank 3.

  Further, the controller C starts the operation of the pump P at the same time as opening the water supply valve 18V in step S116, and shifts to step S101 to execute the scale removal process. That is, the controller C applies a negative potential to the electrode 30 from the DC power supply 40 and applies a positive potential to the electrode 31. As a result, the conductor 32 is charged to the same negative potential as the electrode 30. At this time, the controller C applies a potential with a high current value to each of the electrodes 30 and 31 in the same manner as in the scale removal process of the above embodiment.

As described above, when a negative potential is applied to the electrode 30 and the conductor 32, and a positive potential is applied to the electrode 31, the electrode 30 and the conductor 32 on the upstream side of the flow path of water (treated water) become a cathode, The electrode 31 on the downstream side becomes an anode. That is, when the electrodes 30 and 31 are energized to the water to be treated in the electrolysis chamber 21,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
In the electrode 7 serving as the anode,
2H ₂ O → 4H ⁺ + O ² + 4e ⁻
Reaction occurs.

  On the other hand, by the operation of the pump P, the water to be treated (tap water) from the water supply source flows into the inflow pipe 12 of the electrolytic treatment means 20 through the water supply pipe 18, and the electrolytic chamber in the electrolytic cell 22 from the inlet 23. 21 is supplied.

When the water to be treated is supplied from the inlet 23 to the electrolysis chamber 21 in the electrolytic cell 22, the electrode 30, the conductor 32, the spacer 34, and the electrode 31 in the electrolysis chamber 21 are immersed in the water to be treated. Become. Then, the water to be treated supplied to the electrolysis chamber 21 sequentially passes through the electrode 30, the conductor 32, the spacer 34 and the electrode 31, and finally the electrolytic treatment means 20 from the outflow pipe 14 connected to the outflow port 24. Leaks out of the water.
At this time, as shown in the above chemical formula, hydroxide ions (OH) are formed on the electrode 30 and the conductor 32 serving as the cathode, particularly on the surface of the conductor 32 serving as the cathode on the electrode 31 side (that is, the upper surface of the conductor 32). ^- ) Is generated. Since hydroxide ions are very strong bases, the periphery of the upper surface of the conductor 32 becomes locally alkaline. Thereby, the hardness component in to-be-processed water reacts with the said hydroxide ion, and turns into a salt. Specifically, ions such as calcium, magnesium, potassium, and silica, which are contained in the water to be treated and are the main scale components, precipitate as hardly soluble salts such as calcium hydroxide, calcium carbonate, and magnesium hydroxide. . When ions such as phosphorus, sulfur and zinc are contained in the water to be treated, calcium sulfate, calcium sulfite, calcium phosphate, zinc phosphate, zinc hydroxide, basic zinc carbonate and the like may be precipitated as salts. Note that some of the ions such as calcium, magnesium, potassium, and silica, which are scale components, are also directly deposited on the upper surface of the conductor 32 by electrodeposition.

  The deposited scale is captured by the spacer 34 located on the downstream side of the flow path of the conductor 32 and collected. That is, the scale deposited on the upper surface of the conductor 32 flows to the spacer 34 in contact with the upper surface of the conductor 32 due to the flow of the water to be treated, and adheres to the surface (lower surface) of the spacer 34 on the conductor 32 side. Then, it adheres to the spacer 34 so as to grow from there to the electrode 31 side. Thereby, since the scale deposited on the upper surface of the conductor 32 can be collected in the spacer 34, the scale can be removed from the water to be treated. Further, in the scale removal step, since the potential is applied to each of the electrodes 30 and 31 with a high current value by the controller C as described above, by supplying water to the electrolytic treatment means 20, The scale contained in the water can be positively deposited on the upper surface of the conductor 32 and efficiently collected by the spacer 34 in contact with the downstream side of the flow path.

  On the other hand, the water to be treated from which the scale has been removed reaches the nozzle 6 via the pump P and the pipe 15 from the outflow pipe 14, and is sprayed onto the object to be cleaned through the injection hole 7, and then the water storage section 8 at the bottom of the cleaning tank 3. Stored in. When the water level of the cleaning water stored in the water storage section 8 in the cleaning tank 3 reaches a predetermined water level, the controller C stops the energization of the electrodes 30 and 31 by the DC power source 40 and performs the electrolytic treatment means 20. The electrolysis of the water to be treated is stopped and the water supply valve 18 is closed to close the water supply pipe 18. Thereby, the water supply to the dishwasher 1 from the water supply piping 18 stops.

  Next, the controller C proceeds to the rinsing process of step S117 in FIG. In this rinsing step, the controller C controls the three-way valve V so that the pipe 11 and the pipe 13 communicate with each other, opens the valve device 15V to open the pipe 15, closes the valve device 17 and closes the pipe 17. To do. Thereby, the water to be treated (hereinafter referred to as rinse water in the rinsing process) stored in the water storage section 8 at the bottom of the cleaning tank 3 flows into the pipe 11 of the circulation circuit 10 from the outlet 9, and the three-way valve V, sucked into the pump P via the pipe 13, discharged to the pipe 15, and injected toward the object to be cleaned from the injection hole 7 of the nozzle 6.

  The rinse water after rinsing the object to be cleaned again returns to the water storage section 8 and flows into the pipe 11 of the circulation circuit 10 from the outlet 9 and is sucked into the pump P via the three-way valve V and the pipe 13. Then, the cycle of discharging to the pipe 15 and spraying from the spray hole 7 of the nozzle 6 toward the object to be cleaned is repeated. As a result, the object to be cleaned can be rinsed with clean water newly introduced into the dishwasher 1.

  When the rinsing process is repeated for a predetermined time, the controller C proceeds to a draining process (scale peeling process) in step S118 of FIG. In this drainage process, the controller C controls the three-way valve V so that the pipe 11 and the inflow pipe 12 communicate with each other, closes the valve device 15V to close the pipe 15, opens the valve device 17V, and opens the pipe 17 Open.

  Further, the controller C applies a positive potential to the electrode 30 from the DC power supply 40 and applies a negative potential to the electrode 31. The controller C applies a potential with a high current value to each of the electrodes 30 and 31 as in the scale removal step. For example, the electric potential is applied to each of the electrodes 30 and 31 with a high current value in the range from the current set value of the controller C of 60 mA (milliampere) or more to a value below the current at which the conductor 32 melts.

  As a result, the rinsing water in the storage section 8 of the cleaning tank 3 flows into the pipe 11, the three-way valve V, and the inflow pipe 12 of the electrolytic treatment means 20 from the outlet 9 and from the outlet 23 to the electrolytic chamber 21 in the electrolytic tank 22. To be supplied. The water to be treated supplied from the inflow port 23 to the electrolysis chamber 21 sequentially passes through the electrode 30, the conductor 32, the spacer 34, and the electrode 31, and is finally subjected to electrolytic treatment from the outflow pipe 14 connected to the outflow port 24. After flowing out of the means 20 and sucked into the pump P, it is discharged to the pipe 17 and discharged from the pipe 17 to the outside of the dishwasher 1.

  At this time, since the potential is applied to each of the electrodes 30 and 31 with a high current value by the controller C as described above, the electrode 30 and the conductor 32 charged to a positive potential, in particular, the conductor 32 serving as the anode. The water to be treated near the electrode 31 side surface (that is, the upper surface of the conductor 32) is acidic. When the acidic water to be treated flows to the spacer 34, the scale collected in the spacer 34 is dissolved, peeled off from the spacer 34, and the rinsing water to be passed through the outflow pipe 14 connected to the outlet 24. It will flow out of the electrolytic treatment means 20. Thereafter, the scale detached from the spacer 34 is discharged out of the dishwasher 1 from the pipe 17 together with the rinsing water (scale peeling step). In this way, the rinse water used for rinsing the object to be cleaned in the draining process is caused to flow to the electrolytic treatment means 20, the scale collected by the spacer 34 is peeled off from the spacer 34, and the dishwasher 1 is rinsed together with the rinse water. Since it can be discharged to the outside, the inconvenience of clogging the spacer 34 can be eliminated as much as possible. Thereby, the maintenance property can be improved.

  As described above, in this embodiment, after rinsing the object to be cleaned with the water after the removal of the surfactant, the detergent, the dirt component, and the like from the cleaning water in step S113 in FIG. The water is discharged (step S114), water is supplied again in step S115, and the object to be cleaned can be rinsed with fresh water.

  In each of the above-described embodiments, the detergent containing an anionic surfactant is used as the detergent. However, for example, when a detergent containing a cationic surfactant is used, Step S103 of Example 1 is used. , The controller C applies a negative potential to the electrode 30 and applies a positive potential to the electrode 31 to thereby include a surfactant charged to a positive potential and a soil component surrounded by the surfactant. Can be attracted to the conductor 32, and the surfactant can be electrostatically adsorbed or fixed to the conductor 32 positively and effectively.

  Similarly, in Step S113 of Example 2, a negative potential is applied to the electrode 30 by the controller C, and a positive potential is applied to the electrode 31, thereby surrounding the surfactant and the surfactant charged to a positive potential. The surfactant containing the contaminated component can be attracted to the conductor 32, and the surfactant can be electrostatically adsorbed or fixed to the conductor 32 positively and effectively.

It is a schematic block diagram which shows one Example at the time of applying the washing | cleaning apparatus of this invention to a tableware washing machine (Example 1). It is a figure which shows the degassing means of the tableware washing machine of FIG. It is a figure which shows the other degassing means of the tableware washing machine of FIG. It is a flowchart of operation | movement of the dishwasher of FIG. It is a flowchart of other operation | movement of the dishwasher of FIG. 1 (Example 2). It is a figure which shows an example of the removal rate of the surfactant in to-be-processed water at the time of applying a 60-mA electric current to the electrode of an electrolytic treatment means, and the removal rate of the scale in to-be-processed water at the time of applying a 500-mA electric current.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tableware washing machine 2 Main body 3 Washing tank 5 Basket 6 Nozzle 7 Injection hole 8 Water storage part 9 Outlet 10 Circulation circuit 11, 13, 15, 17 Piping 12 Inflow piping 14 Outflow piping 18 Water supply piping 20 Electrolytic processing means 21 Electrolytic chamber 22 Electrolyzer 22A Container body 22B, 22C Lid member 23 Inlet 24 Outlet 30, 31 Electrode 32 Conductor 34 Porous spacer 37 Degassing means 37V Air venting valve 40 DC power supply C Controller P Pump

Claims (5)

A cleaning device for cleaning an object to be cleaned in a cleaning tank,
Electrolytic treatment comprising at least a pair of electrodes, an insulator scale collecting material capable of collecting underwater scale, and a conductor capable of collecting underwater surfactant by being energized only with the first electrode. With means,
The electroconductive means is made negative by the first electrode of the electrolytic treatment means, and a scale removal treatment step for collecting the scale contained in the water supplied to the cleaning tank in the scale recovery material is performed, and the conductive A surface-active agent removing treatment step of collecting a surfactant contained in water used as washing water in the washing step in the washing tank in the electric conductor is performed with a body having a positive potential or a negative potential. Cleaning device.   The cleaning apparatus according to claim 1, wherein a rinsing step in the cleaning tank is performed with water processed in the surfactant removal processing step.   After discharging the water treated in the surfactant removal treatment step, the water supply and the scale removal treatment step are executed, and the rinsing step in the washing tank is executed with the water treated in the scale removal treatment step. The cleaning apparatus according to claim 1.   In a state where the electric conductor of the electrolytic treatment means is at a positive potential, the water treated in the surfactant removing treatment step or the water used in the rinsing step is circulated through the electric conductor and then discharged. The cleaning apparatus according to any one of claims 1 to 3, wherein a scale peeling process is performed.   The cleaning apparatus according to claim 1, wherein the electrolytic treatment unit includes a gas venting unit.

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