WO2017138047A1

WO2017138047A1 - Water treatment apparatus

Info

Publication number: WO2017138047A1
Application number: PCT/JP2016/004622
Authority: WO
Inventors: 亮子乾; 泰士山本; 敦志辻
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-02-10
Filing date: 2016-10-19
Publication date: 2017-08-17
Also published as: JP6528326B2; JP2017140579A

Abstract

This water treatment apparatus is provided with a first water tank, a second water tank, a third water tank, a fourth water tank, a first electrode provided in the first water tank, a second electrode provided in the second water tank and corresponding to the first electrode, a third electrode provided in the third water tank, and a fourth electrode provided in the fourth water tank and corresponding to the third electrode. The water treatment apparatus is also provided with: an ion exchange membrane that partitions the third water tank from the fourth water tank; a first water channel for removing water electrolyzed in the first water tank without being fed to the third and fourth water tanks; and a first communication channel for bringing the second water tank into communication with the fourth water tank.

Description

Water treatment equipment

This disclosure relates to water treatment equipment.

アルカリ Alkaline water is known to contribute to the maintenance and enhancement of physical health. For example, alkaline water having a pH of about 9.5 is effective in improving gastrointestinal conditions. Alkaline water having a pH higher than 10 is used for cooking. A water treatment device is a device capable of producing such alkaline water. This is sometimes called an alkali ion water conditioner or the like.

A conventional water treatment apparatus includes an anode tank provided with an anode, a cathode tank provided with a cathode, a diaphragm partitioning the anode tank and the cathode tank, and a supply passage for supplying raw water to each of these tanks. . In a state where a voltage is applied to the anode and the cathode, the raw water passes through the anode tank to generate acidic water, and the raw water adds the cathode tank to generate alkaline water.

Alkaline water with high dissolved hydrogen concentration is thought to contribute to the removal of active oxygen, which is presumed to cause aging and disease. As an example of a method for generating alkaline water having a high dissolved hydrogen concentration using a conventional water treatment device, a method for increasing the degree of electrolysis in a cathode tank and generating a large amount of hydrogen is known. However, according to this method, since the pH of alkaline water further increases, it is difficult to produce alkaline water suitable for drinking.

Patent Document 1 discloses an example of a water treatment apparatus for solving the above problems. In this water treatment apparatus, in addition to the anode tank, the cathode tank, and the diaphragm, the second anode tank to which the acidic water generated in the anode tank is supplied, and the alkaline water generated in the cathode tank is supplied. Two cathode tanks, a second anode provided in the second anode tank, a second cathode provided in the second cathode tank, and an ion exchange partitioning the second anode tank and the second cathode tank With a membrane. In the second cathode chamber, alkaline water is electrolyzed by a solid polymer membrane (SPE) method, and hydrogen and hydroxide ions are generated. For this reason, the dissolved hydrogen concentration of the alkaline water supplied to the second cathode tank is increased by the generated hydrogen. On the other hand, when the hydrogen ions generated in the second anode tank move to the second cathode tank via the ion exchange membrane, an increase in the pH of the alkaline water supplied to the second cathode tank is suppressed.

As described above, according to the water treatment apparatus, the dissolved hydrogen concentration is increased while the increase in pH of the alkaline water supplied to the second cathode tank is suppressed, so that the dissolved hydrogen concentration is high and can be used for drinking. Suitable alkaline water is produced.

According to the water treatment apparatus of Patent Document 1, strongly acidic water having a high concentration of hypochlorous acid generated with the generation of alkaline water is supplied to the anode tank. For this reason, there exists a possibility of shortening the lifetime of an anode tank and an ion exchange membrane.

JP 2005-40781 A

One form of the water treatment device according to the present disclosure includes a first water tank, a second water tank, a third water tank, a fourth water tank, a first electrode provided in the first water tank, A second electrode corresponding to the first electrode, a third electrode provided in the third water tank, and a fourth electrode corresponding to the third electrode provided in the fourth water tank. Electrode. Furthermore, one form of the water treatment apparatus supplies the third water tank and the fourth water tank with the ion exchange membrane that partitions the third water tank and the fourth water tank, and the water electrolyzed in the first water tank. A first water channel for taking out without performing, and a first communication passage communicating the second water tank and the fourth water tank.

It is possible to provide a water treatment apparatus capable of generating alkaline water having a high dissolved hydrogen concentration and hardly causing chemical damage to its constituent elements.

FIG. 1 is a schematic diagram of the entire water treatment apparatus according to the first embodiment. FIG. 2 is a schematic diagram of the entire water treatment apparatus according to the second embodiment. FIG. 3 is a schematic diagram of the entire water treatment apparatus according to the third embodiment. FIG. 4 is a schematic diagram of the entire water treatment apparatus according to the fourth embodiment.

(An example of a form that the water treatment device can take)
One form of the water treatment device according to the present disclosure includes a first water tank, a second water tank, a third water tank, a fourth water tank, a first electrode provided in the first water tank, A second electrode corresponding to the first electrode, a third electrode provided in the third water tank, and a fourth electrode corresponding to the third electrode provided in the fourth water tank. Electrode. Furthermore, one form of the water treatment apparatus supplies the third water tank and the fourth water tank with the ion exchange membrane that partitions the third water tank and the fourth water tank, and the water electrolyzed in the first water tank. A first water channel for taking out without performing, and a first communication passage communicating the second water tank and the fourth water tank.

In the water treatment apparatus, when a voltage is applied to the first electrode and the second electrode so that the potential of the first electrode is higher than the potential of the second electrode, acidic water is generated in the first water tank. And alkaline water is generated in the second water tank. Since the acidic water is not supplied to the third water tank and the fourth water tank by including the first water channel in the water treatment device, the possibility that the third water tank and the fourth water tank are chemically damaged is reduced. To do.

According to an example of the water treatment apparatus, the third water tank can be connected to a raw water channel that supplies raw water.

According to the water treatment device, the alkaline water supplied to the fourth water tank is electrolyzed, so that the dissolved hydrogen concentration of the alkaline water is increased. Moreover, the alkaline water which passes through a 4th water tank by the hydrogen ion which generate | occur | produced when the raw | natural water supplied to the 3rd water tank electrolyzed passes an ion exchange membrane and is supplied to a 4th water tank. An increase in the pH is suppressed. According to this apparatus configuration, since all the alkaline water generated in the second water tank can be supplied to the fourth water tank, the time required for generating alkaline water having a high dissolved hydrogen concentration can be shortened.

According to an example of the water treatment apparatus, the fourth water tank can be connected to a raw water channel that supplies raw water.

According to the water treatment apparatus, raw water is supplied to the third water tank and the fourth water tank, and the third electrode and the fourth electrode are set such that the potential of the fourth electrode is higher than the potential of the third electrode. By applying a voltage to the electrodes, acidic water is generated in the fourth water tank. Thereby, since the scale adhering to the fourth water tank is dissolved in the acidic water, the scale adhering to the fourth water tank can be removed.

According to an example of the water treatment apparatus, the first communication path further communicates the second water tank and the third water tank.

According to the water treatment device, the alkaline water supplied to the fourth water tank is electrolyzed, so that the dissolved hydrogen concentration of the alkaline water is increased. Moreover, the hydrogen ion which generate | occur | produced when the alkaline water supplied to the 3rd water tank is electrolyzed passes an ion-exchange membrane, and is supplied to a 4th water tank, The alkalinity which passes a 4th water tank Increase in pH of water is suppressed. According to this device configuration, there is no need to provide a water channel different from the first communication passage between the first water tank and the second water tank, and the third water tank and the fourth water tank. Can be simplified.

According to an example of the water treatment apparatus, the water treatment apparatus further includes a second water channel for taking out the water electrolyzed in the second water tank without supplying the water to the third water tank and the fourth water tank.

As the generation time of alkaline water becomes longer, scales such as calcium carbonate and magnesium hydroxide tend to adhere to the fourth water tank. According to the said water treatment apparatus, it can suppress that a scale adheres to a 4th water tank by taking out alkaline water using a 2nd water channel.

(Embodiment 1)
As shown in FIG. 1, the water treatment device 10 includes a first water tank 31 and a second water tank 35 separated by a diaphragm 39, and a third water tank partitioned by an ion exchange membrane 49. A hydrogen water tank 40 having a water tank 41 and a fourth water tank 45 is provided. The alkaline water tank 30 and the hydrogen water tank 40 are stored in the case 20.

A faucet 1 and a flow path switch 2 are provided outside the water treatment apparatus 10. The faucet 1 discharges tap water. The flow path switching unit 2 is attached to the faucet 1 and supplies tap water to the water supply port 11 in accordance with a user operation.

The water treatment apparatus 10 includes a water supply port 11, a first water discharge port 12, a second water discharge port 13, and a third water discharge port 14 protruding toward the outside of the case 20. The water supply port 11 supplies tap water to the inside of the water treatment apparatus 10. The first water discharge port 12 discharges alkaline water or alkaline hydrogen water having a pH higher than that of tap water from the water treatment device 10. Alkaline hydrogen water has a higher dissolved hydrogen concentration than alkaline water. The second water outlet 13 and the third water outlet 14 discharge acidic water having a pH lower than that of tap water from the water treatment device 10.

The case 20 includes a water purification unit 21, a first power source 24, a second power source 25, a first switch 26, a second switch 27, a raw water channel 50, a first communication channel 51, and a first water channel 52. The 1st water supply channel 53, the 1st pipe 61, and the 2nd pipe 62 are stored. The water purification unit 21 is an activated carbon type and a filtration membrane type water purifier, and purifies tap water. The raw water, which is the water purified by the water purification unit 21, passes through the raw water channel 50 and is supplied to the alkaline water tank 30. The water purification unit 21 includes an activated carbon unit 22 and a filtration membrane unit 23. The activated carbon part 22 has activated carbon, and removes organic substances, odors, residual chlorine and the like from tap water. As an example, the filtration membrane part 23 has a polyethylene hollow fiber membrane, and removes particles of 0.1 μm or more, bacteria, red rust, and the like from the water that has passed through the activated carbon part 22.

The first power supply 24 and the second power supply 25 are DC power supplies used for electrolysis in the alkaline water tank 30 and the hydrogen water tank 40. The potential V1A of the anode 24X of the first power supply 24 is higher than the potential V1B of the cathode 24Y of the first power supply 24. The potential V2A of the anode 25X of the second power source 25 is higher than the potential V2B of the cathode 25Y of the second power source 25.

The first switch 26 includes a first input terminal 26A, a second input terminal 26B, a first changeover switch 26E, a first output terminal 26X, and a second output terminal 26Y. The first input terminal 26A and the second input terminal 26B are electrically connected to the anode 24X and the cathode 24Y of the first power supply 24, respectively. The first switch 26 sets the potential of the first output terminal 26X and the potential of the second output terminal 26Y to the potential V1A and the potential V1B in accordance with the operation of the first switch 26E. Further, it is possible to switch between the normal mode and the reverse power mode by operating the first changeover switch 26E. In the normal mode, the potential of the first output terminal 26X is set to the potential V1A, and the potential of the second output terminal 26Y is set to the potential V1B. In the reverse power mode, the potential of the first output terminal 26X is set to the potential V1B, and the potential of the second output terminal 26Y is set to the potential V1A. The first changeover switch 26E is a button provided on the outer surface of the case 20 as an example.

The second switch 27 includes a third input terminal 27A, a fourth input terminal 27B, a second changeover switch 27E, a third output terminal 27X, and a fourth output terminal 27Y. The third input terminal 27A and the fourth input terminal 27B are electrically connected to the anode 25X and the cathode 25Y of the second power supply 25, respectively. The second switch 27 sets the potential of the third output terminal 27X and the potential of the fourth output terminal 27Y to the potential V2A and the potential V2B according to the operation of the second switch 27E. Further, it is possible to switch to the normal mode, the reverse power mode, and the insulation mode by operating the second changeover switch 27E. In the normal mode, the potential of the third output terminal 27X is set to the potential V2A, and the potential of the fourth output terminal 27Y is set to the potential V2B. In the reverse power mode, the potential of the third output terminal 27X is set to the potential V2B, and the potential of the fourth output terminal 27Y is set to the potential V2A. In the insulation mode, the third input terminal 27A and the fourth input terminal 27B are not electrically connected to the anode 25X and the cathode 25Y of the second power source. The second changeover switch 27E is a button provided on the outer surface of the case 20 as an example.

The alkaline water tank 30 generates alkaline water by electrolyzing raw water using the first power source 24. The alkaline water tank 30 includes a first water tank 31, a second water tank 35, and a diaphragm 39. The first water tank 31 includes a first inlet 32, a first outlet 33, and a first electrode 34. The second water tank 35 includes a second inlet 36, a second outlet 37, and a second electrode 38. The first water tank 31 and the second water tank 35 are integrally formed and are separated by a diaphragm 39. The shape of the alkaline water tank 30 is preferably such that water easily passes from the first inlet 32 and the second inlet 36 to the first outlet 33 and the second outlet 37. The first electrode 34 and the second electrode 38 have a shape that increases the contact area with the water passing through the alkaline water tank 30, for example, along the inner surface of the first water tank 31 and the inner surface of the second water tank 35. An elongated shape is preferred. The first electrode 34 and the first output terminal 26X are electrically connected. The second electrode 38 and the second output terminal 26Y are electrically connected.

The hydrogen water tank 40 generates alkaline hydrogen water by electrolyzing the alkaline water generated in the alkaline water tank 30 using the second power source 25. The hydrogen water tank 40 includes a third water tank 41, a fourth water tank 45, and an ion exchange membrane 49. The third water tank 41 includes a third inflow port 42, a third outflow port 43, and a third electrode 44. The fourth water tank 45 includes a fourth inlet 46, a fourth outlet 47, and a fourth electrode 48. The third water tank 41 and the fourth water tank 45 are formed integrally and are partitioned by an ion exchange membrane 49. The ion exchange membrane 49 is a cation exchange membrane and can pass cations contained in the water in the third water tank 41 and the fourth water tank 45. The shape of the hydrogen water tank 40 is preferably a shape in which water easily passes from the third inlet 42 and the fourth inlet 46 to the third outlet 43 and the fourth outlet 47. The third electrode 44 and the third output terminal 27X are electrically connected. The fourth electrode 48 and the fourth output terminal 27Y are electrically connected.

The first communication path 51 communicates the second outlet 37 and the fourth inlet 46. The first water channel 52 communicates the first outlet 33 and the third water outlet 14. The first water supply channel 53 communicates the filtration membrane part 23 and the third inflow port 42. The raw water channel 50 communicates the filtration membrane part 23 with the first inlet 32 and the second inlet 36. The first pipe 61 communicates the fourth outlet 47 and the first water outlet 12. The second pipe 62 communicates the third outlet 43 and the second water outlet 13.

The operation of the alkaline water tank 30 of the water treatment apparatus 10 will be described.

The tap water discharged from the faucet 1 passes through the water supply port 11 and is supplied to the water purification unit 21. The raw water purified by the water purification unit 21 is supplied to the first water tank 31 and the second water tank 35 of the alkaline water tank 30.

When the first switch 26 is in the normal mode, the potential of the first electrode 34 is set to about V1A, and the potential of the second electrode 38 is set to about V1B. Since the potential of the first electrode 34 is higher than the potential of the second electrode 38, a reduction reaction of raw water represented by the following formula [1] occurs in the second water tank 35.

[1] expression is reduced water molecules of H _{2 O} raw water, hydroxide ions OH ^- is a chemical reaction formula showing that and hydrogen H ₂ are produced. When the electrolysis proceeds hydroxide ion OH ^- increases the concentration of the alkaline water is generated. The electrolysis of the alkaline water tank 30 is controlled such that the pH of the alkaline hydrogen water is suitable for drinking, for example, the pH is about 9.5. The generated alkaline water is sent to the fourth water tank 45 of the hydrogen water tank 40 through the first communication path 51.

On the other hand, in the first water tank 31, the oxidation reaction of the raw water shown by the following formulas [2] and [3] occurs.

The formula [2] is a chemical reaction formula showing that water molecules H ₂ O in raw water are oxidized to generate hydrogen ions H ⁺ and oxygen O ₂ . As electrolysis progresses, the concentration of hydrogen ions H ⁺ increases and acidic water is generated. The formula [3] is a chemical reaction formula showing that chloride ion Cl 2 ^{− in} raw water is oxidized to produce chlorine Cl ₂ . The reaction of formula [3] takes precedence over the reaction of formula [2]. The produced chlorine Cl ₂ causes a chemical reaction represented by the following formula [4]. [4] Formula is a chemical reaction formula showing that hypochlorous acid HClO and hydrochloric acid HCl are generated from water molecules H ₂ O and chlorine Cl _{2 in} raw water.

The operation of the hydrogen water tank 40 of the water treatment apparatus 10 will be described.

When the second switch 27 is in the normal mode, the potential of the third electrode 44 is set to about V2A, and the potential of the fourth electrode 48 is set to about V2B. Since the potential of the third electrode 44 is higher than the potential of the fourth electrode 48, a reduction reaction of alkaline water occurs in the fourth water tank 45. That is, the chemical reaction represented by the formula [1] occurs. Moreover, in the 3rd water tank 41, the oxidation reaction of raw | natural water arises. That is, the chemical reactions shown in the formulas [2] to [4] occur.

When the degree of progress of electrolysis is increased, the amount of hydrogen H ₂ generated in the fourth water tank 45 is increased, and the dissolved hydrogen concentration of alkaline water can be increased. At the same time, hydroxide ion OH ^- concentration also increased, pH also increases. At this time, hydrogen ions H ⁺ generated in the third water tank 41 pass through the ion exchange membrane 49 and move to the fourth water tank 45. For this reason, an increase in the concentration of hydroxide ions OH ⁻ is suppressed, and an increase in pH is suppressed. Therefore, alkaline hydrogen water suitable for drinking can be generated in the fourth water tank 45.

Further, when the second switch 27 is in the insulation mode, no voltage is applied to the third electrode 44 and the fourth electrode 48, and electrolysis is not performed. For this reason, alkaline water that does not increase the dissolved hydrogen concentration can be obtained from the fourth water tank 45.

Moreover, in the alkaline water tank 30, as shown in the formula [4], the acidic water produced in the first water tank 31 contains hypochlorous acid HClO. The water containing hypochlorous acid HClO produced is strongly acidic. Strongly acidic water may cause chemical damage to components such as water tanks.

According to the water treatment device 10, since acidic water is discharged from the first outlet 33 to the outside of the water treatment device 10 through the first water channel 52, the third water tank 41, the fourth water tank 45, In addition, the possibility that the ion exchange membrane 49 is chemically damaged is reduced.

Further, since raw water is supplied to the third water tank 41, all of the alkaline water generated in the second water tank 35 can be supplied to the fourth water tank 45. For this reason, the time required for the production of alkaline water having a high dissolved hydrogen concentration can be shortened, and the power required for the production can be reduced.

(Embodiment 2)
The water treatment apparatus 10A according to the second embodiment has substantially the same configuration as the water treatment apparatus 10 according to the first embodiment. The second embodiment is different from the first embodiment in that a first communication path 51A is provided instead of the first communication path 51 and the first water supply path 53.

As shown in FIG. 2, the first communication path 51A includes a first branch 51X. The first communication passage 51 </ b> A communicates the second water tank 35, the third water tank 41, and the fourth water tank 45. The water discharged from the second outlet 37 is divided into the third inlet 42 and the fourth inlet 46 in the first branch 51X and supplied to each.

When the second switch 27 is in the normal mode, an alkaline water oxidation reaction occurs in the third water tank 41. That is, the chemical reactions shown in the formulas [2] to [4] occur. In the fourth water tank 45, the reduction reaction of alkaline water occurs as in the first embodiment. That is, the chemical reaction represented by the formula [1] occurs.

According to the water treatment apparatus 10 </ b> A, it is not necessary to provide the first water supply channel 53 between the first water tank 31 and the second water tank 35 and the third water tank 41 and the fourth water tank 45. The configuration can be simplified.

(Embodiment 3)
The water treatment device 10B according to the third embodiment has substantially the same configuration as the water treatment device 10 according to the first embodiment. The third embodiment is different from the configuration of the first embodiment in that the second water channel 54, the fourth water discharge port 15, and the first valve 17 are further provided.

As shown in FIG. 3, the fourth water discharge port 15 penetrates the case 20. The first valve 17 communicates with the first communication passage 51, the second water channel 54, and the fourth inflow port 46. The second water channel 54 communicates the first valve 17 and the fourth water discharge port 15. The first valve 17 can switch the flow path from any one of the first communication path 51 to the fourth inlet 46 and from the first communication path 51 to the second water path 54.

As the generation time of alkaline water becomes longer, scales such as calcium carbonate and magnesium hydroxide tend to adhere to the fourth water tank 45. According to the water treatment device 10 </ b> B, the second switch 27 is set to the insulation mode, and the alkaline water is extracted using the second water channel 54, thereby suppressing the scale from adhering to the fourth water tank 45. it can.

(Embodiment 4)
The water treatment device 10C of the fourth embodiment has substantially the same configuration as the water treatment device 10 of the first embodiment. The fourth embodiment is different from the configuration of the first embodiment in that the second water supply channel 56 and the second valve 18 are further provided.

As shown in FIG. 4, the second water supply channel 56 branches off from the raw water channel 50. The second valve 18 communicates with the second water supply path 56, the first communication path 51, and the fourth inflow port 46. The second valve 18 can switch the flow path from the first communication path 51 to the fourth inlet 46 and from the second water supply path 56 to the fourth inlet 46.

When the second switch 27 is in the reverse power mode, an oxidation reaction of raw water occurs in the fourth water tank 45. That is, a chemical reaction represented by the formulas [2] to [4] occurs, and acidic water is generated in the fourth water tank 45. For this reason, the scale adhering to the 4th water tank 45 melt | dissolves in acidic water, and a scale is removed.

(Modification)
The description regarding each said embodiment is an illustration of the form which the water treatment apparatus which concerns on this indication can take, and it does not intend restrict | limiting the form. In addition to the embodiments, the water treatment apparatus according to the present disclosure may take a form in which, for example, the modifications of the above-described embodiments described below and at least two modifications not contradicting each other are combined.

・ Raw water creation method can be changed arbitrarily. In the first example, well water or mineral water is purified by the water purification unit 21, and the purified raw water is supplied to the water treatment device 10. In the second example, the water purification unit 21 is omitted, and tap water is directly supplied to the water treatment apparatus 10 as raw water.

-The addition part which adds an electrolyte to raw | natural water can be added to the water treatment apparatus 10. FIG. An addition part adds the salt which is an example of electrolyte to the raw | natural water discharged from the water purification part 21, for example. Sodium ions Na added salt is in water ⁺ and chloride ion Cl ^-, and therefore, the electrolysis of the raw water is promoted. For this reason, the pH of the generated alkaline water is likely to be increased.

In the third embodiment, the first valve 17 need not be provided. When the second switch 27 is in the insulation mode, alkaline water can be discharged from the second water channel 54 and the first pipe 61.

The first switch 26 according to the third embodiment may be set in the reverse power mode, and acidic water may be generated in the second water tank 35. Even in the second water tank 35 through which raw water passes, the scale may adhere after a long period of time. The scale adhering to the second water tank 35 can be removed by the generated acidic water. Further, the scales attached to the second water tank 35 and the fourth water tank 45 can be simultaneously removed by combining the configurations of the third embodiment and the fourth embodiment.

Since the water treatment apparatus according to one embodiment of the present disclosure is difficult to chemically damage the constituent elements and can extend the life of the apparatus, the water treatment apparatus is used for home appliances that use a large amount of water or are difficult to repair the constituent elements. Applicable.

DESCRIPTION OF SYMBOLS 10 Water treatment apparatus 10A Water treatment apparatus 10B Water treatment apparatus 10C Water treatment apparatus 31 1st water tank 34 1st electrode 35 2nd water tank 38 2nd electrode 41 3rd water tank 44 3rd electrode 45 4th Water tank 48 Fourth electrode 49 Ion exchange membrane 50 Raw water channel 51 First communication channel 51A First communication channel 52 First water channel 54 Second water channel

Claims

A first aquarium;
A second aquarium,
A third aquarium,
A fourth aquarium,
A first electrode provided in the first water tank;
A second electrode provided in the second water tank and corresponding to the first electrode;
A third electrode provided in the third water tank;
A fourth electrode provided in the fourth water tank and corresponding to the third electrode;
An ion exchange membrane that partitions the third water tank and the fourth water tank;
A first water channel for extracting water electrolyzed in the first water tank without supplying it to the third water tank and the fourth water tank;
A water treatment apparatus comprising: a first communication passage that communicates the second water tank and the fourth water tank.
The water treatment apparatus according to claim 1, wherein the third water tank is connectable to a raw water channel that supplies raw water.
The water treatment apparatus according to claim 1, wherein the fourth water tank is connectable to a raw water channel that supplies raw water.
The water treatment device according to any one of claims 1 to 3, wherein the first communication path further communicates the second water tank and the third water tank.
The second water channel for removing water electrolyzed in the second water tank without supplying the water to the third water tank and the fourth water tank. Water treatment equipment.