JP5815966B2 - Water purifier - Google Patents

Description

  The present invention relates to a water purifier that purifies water.

  Conventionally, in a water purifier, what irradiates an ultraviolet-ray as a sterilization means is known. An ultraviolet germicidal lamp or a deep ultraviolet LED is used to generate ultraviolet rays. Therefore, it is possible to reduce the odor, dirt, and influence on the human body as in the case of sterilization using chemicals.

  For example, Patent Document 1 discloses a water purifier including an ultraviolet germicidal lamp and a water purification tank. According to this water purifier, it is possible to perform sterilization by irradiating the water in the water purification tank with ultraviolet light by the ultraviolet sterilization lamp installed in the water purification tank.

JP 2010-149031 A

  However, the conventional sterilization methods described above have the following problems.

  First, mercury lamps are mainly used as ultraviolet germicidal lamps, which have a great impact on the environment.

  Secondly, the deep ultraviolet LED has an output currently achieved of several mw, has a luminous efficiency as low as about 1/1000 that of an ultraviolet germicidal lamp, and has a small germicidal ability.

  Third, if ultraviolet light leaks to the outside due to damage to the main body housing or the like, it is harmful to the human body.

  For this reason, there is a demand for a water purifier that has a low environmental impact and can safely sterilize the human body.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water purifier that is environmentally friendly, safe for the human body, and highly sterilizable.

A first water purifier according to the present invention is connected to a water inlet and a water outlet, and has a water passing part for passing water, and a sterilizing part provided inside the water passing part for sterilizing the water that has entered the water. The sterilizing unit is formed to contain cuprous oxide , and a reducing agent supply unit that supplies a reducing agent that returns the copper oxide to the cuprous oxide is provided in the sterilizing unit. It is a water purifier.

  In this invention, it is preferable that the said sterilization part is a copper material surface by which the cuprous oxide film was formed.

  In this invention, it is preferable that the said sterilization part is what a cuprous oxide was carry | supported by the photocatalyst.

  In the present invention, the sterilizing part is preferably a binder composite containing an inorganic binder and cuprous oxide.

  In the present invention, it is preferable that the reducing agent is stored and the reducing agent storage unit connected to the reducing agent supply unit and the pipe body is provided outside the water flow unit.

  In this invention, it is preferable that the said reducing agent supply part injects the said reducing agent toward the said sterilization part.

  In the present invention, the reducing agent is preferably a liquid containing an organic acid or an organic acid salt.

  In the present invention, the organic acid or organic acid salt is preferably at least one selected from ascorbic acid, gallic acid, tartaric acid, sodium potassium tartrate, and citric acid.

  In the present invention, it is preferable that a cleaning liquid supply unit for supplying a cleaning liquid to the sterilization unit is provided inside the water flow unit, and the cleaning liquid is for cleaning the sterilization unit supplied with the reducing agent.

  In the present invention, it is preferable that the cleaning liquid is stored and the cleaning liquid storage unit connected to the cleaning liquid supply unit by a pipe body is provided outside the water flow unit.

  In the present invention, the cleaning liquid is preferably water.

  In this invention, it is preferable that the said sterilization part is formed so that attachment or detachment with respect to the said water flow part is possible.

  In this invention, it is preferable to provide the heater which heats the said sterilization part.

  In this invention, it is preferable to provide the heater which heats the said reducing agent.

  In the present invention, the heater heats the reducing agent stored in the reducing agent storage unit, or the reducing agent flowing through a pipe connecting the reducing agent storage unit and the reducing agent supply unit. It is preferable to heat.

The 2nd water purifier which concerns on this invention is connected to the water inlet which can be opened and closed, and the water outlet which can be opened and closed, the water flow part which lets water flow in, and the said water which was provided inside the said water flow part, and entered water A sterilizing unit for sterilizing, and the sterilizing unit is formed by supporting cuprous oxide on a photocatalyst, and a sacrificial reagent supply unit for supplying a sacrificial reagent to the sterilizing unit inside the water flow unit, A luminescent part for irradiating light to the sterilizing part, the sacrificial reagent is dissolved in water to form a copper oxide complex with copper oxide derived from the cuprous oxide, the water inlet and the It is a water purifier which closes a water outlet, closes the water flow part, and reduces the copper oxide complex to cuprous oxide by light from the light emitting part.

  In the present invention, the photocatalyst is preferably titanium oxide.

  According to the present invention, the sterilization part contains cuprous oxide, and since the reducing property of this cuprous oxide is used for sterilization, it is safer and more environmentally friendly than water sterilization and purifies water. Can do. In addition, cuprous oxide is oxidized by sterilization to become copper oxide, but it can be returned to cuprous oxide by a reduction reaction with the supplied reducing agent or photocatalyst, so that the sterilization is maintained and water is purified. It can be performed.

It is the schematic which shows an example of 1st embodiment of the water purifier which concerns on this invention. It is the schematic which shows an example of 2nd embodiment of the water purifier which concerns on this invention.

[First embodiment]
Drawing 1 is a schematic diagram showing an example of a water purifier of a first embodiment. This water purifier includes a water passage portion 1 connected to a water inlet 11 and a water outlet 12 and a sterilization portion 2 disposed in the water passage portion 1.

  The water flow unit 1 is stored in a housing 10 that includes a main body case and the like. The water flow section 1 is a water flow path for sending water (water) from the water inlet 11 to the water outlet 12. The water flow portion 1 is formed of an appropriate material such as a metal or a resin molded body. A mechanism for actively taking water from the outside into the water channel, such as a mechanism for sucking water or a mechanism for discharging water, may be provided inside or outside the water flow section 1. Examples of the mechanism include a pump mechanism. Further, for example, the water inlet 11 may be connected to a pipe through which water flows, such as a water pipe, so that the water may be taken into the water passing portion 1. In that case, water can pass through the water flow section 1 with the pressure of water flow.

  The sterilization unit 2 is provided in a flow path through which water flows in the water flow unit 1. Thereby, the raw water that has entered from the water inlet 11 contacts the sterilization unit 2. The raw water hitting the sterilizing unit 2 is purified by sterilizing water in the water by the sterilizing action of the sterilizing unit 2. Thereafter, the purified water is discharged from the outlet 12.

  The sterilization part 2 is formed including cuprous oxide. Cuprous oxide is reducible, and the bactericidal ability due to this reducibility is used for water purification. That is, bacteria in water can be sterilized by the reducing power of cuprous oxide. However, cuprous oxide is gradually oxidized in water to change into copper oxide and lose reducibility. Therefore, in this embodiment, by supplying a reducing agent to the sterilizing unit 2, the copper oxide is returned to the cuprous oxide again to regenerate and impart reducing properties, thereby restoring the antibacterial activity.

  A reducing agent supply unit 3 that supplies a reducing agent to the sterilization unit 2 is provided in the water flow unit 1. The reducing agent supply unit 3 is formed by a hollow nozzle that is tapered and tapers toward the tip, and the tip is directed to the sterilization unit 2. Then, the reducing agent is supplied from the reducing agent supply unit 3 toward the sterilization unit 2 at regular time intervals. The supply of the reducing agent may be based on the oxidation state of copper, such as when the cuprous oxide is reduced by a predetermined amount or when the copper oxide is increased by a predetermined amount. The reducing agent is preferably supplied by being injected, and more preferably supplied so that the sterilizing unit 2 receives a pressing force during the injection. In that case, it is possible to reduce the copper oxide to cuprous oxide quickly by spreading the reducing agent to the sterilization unit 2 more quickly.

  Thus, in the above water purifier, water can be sterilized safely and efficiently on the human body by the sterilization action of cuprous oxide. And the sterilization effect | action of the sterilization part 2 can be recovered by applying a reducing agent.

  The reducing agent supply unit 3 is connected by a tubular body 5 to a reducing agent storage unit 4 that stores the reducing agent. The tube body 5 can be composed of a hollow pipe or a hose. Thus, by installing the reducing agent storage unit 4, the reducing agent can be supplied when necessary, and the reduction reaction of copper oxide can be performed with good timing. Although the reducing agent storage part 4 may be provided in the water flow part 1, in this form, it is provided outside the water flow part 1. When the reducing agent storage unit 4 is provided outside the water flow unit 1, the reductant can be easily replenished. For example, the reducing agent can be stored in the reducing agent storage unit 4 by removing the cap provided on the upper part of the reducing agent storage unit 4 and injecting the reducing agent from this opening.

  The supply of the reducing agent from the reducing agent supply unit 3 may be performed by computer control, for example. Specifically, for example, when the concentration of copper oxide becomes high or a predetermined time elapses, a command is issued from the computer, and the reducing agent is supplied from the reducing agent supply unit 3 to the sterilization unit 2. Moreover, you may perform the supply of a reducing agent by the timer means which act | operates for every predetermined time. As the supply means, a pressure change mechanism, a pump mechanism or the like can be adopted. For example, the reducing agent storage unit 4 is pressurized so that the reducing agent is pushed out toward the tubular body 5, and the reducing agent is ejected from the reducing agent supply unit 3.

  One preferable form of the sterilizing part 2 is one in which a cuprous oxide film is formed on the surface of the copper material. It is easy to form cuprous oxide on the surface of the copper material, and the sterilizing part 2 can be easily formed. For example, a cuprous oxide film can be formed by immersing a copper material in a copper sulfate solution added with a hydrogen peroxide solution. The copper material is preferably a copper plate. For example, the sterilization part 2 is configured by forming a cuprous oxide layer on the copper plate surface. By using a plate-like material, the sterilizing part 2 can be easily formed, and it becomes easy to attach and detach as described later. In order to increase the surface area, the copper plate may be provided with fine surface irregularities or a plurality of fine holes. Moreover, it is not restricted to plate shape, In order to improve a surface area further, shapes, such as net | network shape, rod shape, and fiber shape, may be sufficient.

  Another preferable embodiment of the sterilizing unit 2 is a cerium oxide supported on a photocatalyst. Copper oxide can be reduced to cuprous oxide by a photocatalyst, and antibacterial performance can be increased by using a reducing agent and a photocatalyst in combination. As the photocatalyst, for example, titanium oxide can be used. The shape of the sterilizing part 2 can be a plate shape, a net shape, a rod shape, a fiber shape, or the like.

  Another preferable embodiment of the sterilizing part 2 is a binder composite containing an inorganic binder and cuprous oxide. In that case, it is possible to use powdered cuprous oxide when forming the sterilizing part 2, and it becomes easy to change the shape of the sterilizing part 2 to various ones. Examples of the inorganic binder that can be used include siloxane and alkyl silicate. Specifically, the sterilization part 2 can be formed by mixing an inorganic binder and cuprous oxide and forming a composite that is bonded and cured with an inorganic binder. The shape of the sterilizing part 2 can be a plate shape, a net shape, a rod shape, a fiber shape, or the like.

  The reducing agent is preferably a liquid containing an organic acid or an organic acid salt. Since organic acids and their salts are safe for living bodies, copper oxide can be safely reduced to cuprous oxide. These can be used in the form of an aqueous solution. Further, from the viewpoint of safety, it is preferably an edible organic acid or an organic acid salt, and more preferably at least one selected from ascorbic acid, gallic acid, tartaric acid, sodium potassium tartrate, and citric acid. In that case, it can reduce more safely. In particular, if it is edible, it can be harmless to the human body.

  In the form of FIG. 1, a cleaning liquid supply unit 6 that supplies a cleaning liquid to the sterilization unit 2 is provided in the water flow unit 1. The cleaning liquid is for cleaning the sterilizing unit 2 supplied with the reducing agent. When a reducing agent is supplied to the sterilizing unit 2, the reducing agent remains in the sterilizing unit 2 and may hinder the sterilization properties of cuprous oxide. Therefore, by supplying the cleaning liquid to the sterilizing unit 2, the reducing agent is washed away, and the sterilizing activity of the cuprous oxide is enhanced.

  The cleaning liquid supply unit 6 is connected by a tube body 8 to a cleaning liquid storage unit 7 that stores the cleaning liquid. The cleaning liquid storage unit 7 is provided outside the water flow unit 1. Including the configuration of each part, the cleaning liquid supply mechanism can have the same configuration as the reducing agent supply mechanism.

  Then, for example, after a predetermined time after the reducing agent is supplied, a command is issued from the computer, and the cleaning liquid is supplied from the cleaning liquid supply unit 6 to the sterilization unit 2. As the supply means, a pressure change mechanism, a pump mechanism or the like can be adopted. For example, the cleaning liquid storage unit 7 is pressurized so that the cleaning liquid is pushed out toward the tube body 8, and the cleaning liquid is ejected from the cleaning liquid supply unit 6 by a jet flow or the like.

  The cleaning liquid is not particularly limited as long as it is a liquid that removes the reducing agent, but is preferably water. The sterilization part 2 can be easily cleaned by using water as the cleaning liquid. Tap water or the like may be used as the water. At that time, it is preferable to remove the reducing agent by the jetting power of water.

  It is preferable that the sterilizing unit 2 is formed to be detachable from the water passing unit 1. When it is detachable, even when the cuprous oxide of the sterilization unit 2 deteriorates and regeneration by reduction is not sufficiently performed, the reducibility can be restored by replacing the sterilization unit 2. Moreover, if it can take out from the housing | casing 10, replacement | exchange of the sterilization part 2 will become easy. In particular, the sterilizing unit 2 is preferably a cartridge type that can be easily replaced. The sterilization unit 2 removed from the housing 10 may be regenerated by applying a reducing agent outside the water purifier.

  In the form of FIG. 1, a heater 9 is further provided. In this form, the heater 9 is disposed in the water flow portion 1. This heater 9 heats the sterilization part 2 or the reducing agent supply part 3 inside the water flow part 1, and the temperature of the sterilization part 2 or the reducing agent supply part 3 rises by heating. As long as any one or more of the sterilization unit 2 and the reducing agent supply unit 3 can be heated, the heater 9 may be provided outside the water flow unit 1. However, in order to heat the sterilization part 2 and the reducing agent supply part 3, it is preferable to be provided adjacent to the water flow part 1. For example, the heater 9 for heating can be installed in close contact with the housing 10 inside the water passage 1 or outside the water passage 1. Thus, when it heats with the heater 9, the reduction reaction of a copper oxide will advance more easily.

  Moreover, the heater 9 may heat a reducing agent. Also in that case, since the copper oxide can be reduced by the reducing agent heated to increase the temperature, the progress of the reaction can be accelerated and the reduction efficiency can be improved. In that case, the heater 9 may be provided in the reducing agent storage unit 4 or may be provided in the tubular body 5 that connects the reducing agent storage unit 4 and the reducing agent supply unit 3. When the heater 9 is provided in the reducing agent storage unit 4, it is possible to heat the reducing agent stored in the reducing agent storage unit 4 and to easily supply the sufficiently heated reducing agent to the sterilization unit 2. Further, when the heater 9 is provided in the pipe 5 that connects the reducing agent storage unit 4 and the reducing agent supply unit 3, the reducing agent flowing through the pipe 5 can be heated and is necessary when necessary. A small amount of reducing agent can be heated.

  When a liquid containing copper (II) ions is mixed with a reducing agent containing a reducing substance, a reaction for reducing to copper ions (I) (Fering reaction) proceeds. At that time, if the mixed system is heated, the reduction reaction proceeds more rapidly. In this embodiment, this reaction can be used to improve the reduction efficiency and regenerate cuprous oxide.

  In addition, in said embodiment, although the example of the washing | cleaning device which flows water into the water flow part 1 continuously and purified water was shown, this embodiment is not limited to this. For example, it may be a batch-type water purifier in which water is stored in the water flow section 1 and sterilized by bringing the water into contact with the sterilization section 2 for a predetermined time, and then water is discharged to purify the water. . In that case, the water inlet 11 and the water outlet 12 may be formed with the same opening.

[Second Embodiment]
Drawing 2 is a schematic diagram showing an example of a water purifier of a second embodiment. This water purifier includes a water passage portion 1 connected to a water inlet 11 and a water outlet 12 and a sterilization portion 2 disposed in the water passage portion 1.

  The water inlet 11 is provided with a water inlet valve 17 that enables switching between opening and closing of the water inlet 11. Further, the water outlet 12 is provided with a water outlet valve 18 that enables switching between opening and closing of the water outlet 12. The valve can be constituted by a valve, an electromagnetic valve, or the like. The opening and closing of these valves may be performed by machine operation or manually.

  The water flow unit 1 is stored in a housing 10 that includes a main body case and the like. The water flow section 1 is a water flow path for sending water (water) from the water inlet 11 to the water outlet 12. The water flow portion 1 is formed of an appropriate material such as a metal or a resin molded body. A mechanism for actively taking water from the outside into the water channel, such as a mechanism for sucking water or a mechanism for discharging water, may be provided inside or outside the water flow section 1. Examples of the mechanism include a pump mechanism. Further, for example, the water inlet 11 may be connected to a pipe through which water flows, such as a water pipe, so that the water may be taken into the water passing portion 1. In that case, water can pass through the water flow section 1 with the pressure of water flow.

  Water flow to the water flow section 1 can be performed by opening the water inlet valve 11 and the water outlet valve 12. Moreover, the water flow to the water flow part 1 can be stopped by closing the water inlet valve 11 and the water outlet valve 12. When the water inlet valve 11 and the water outlet valve 12 are closed, the water flow part 1 will be in a closed state.

  The sterilization unit 2 is provided in a flow path through which water flows in the water flow unit 1. Thereby, the raw water entered from the water inlet 11 comes into contact with the sterilization unit 2. The raw water hitting the sterilizing unit 2 is purified by sterilizing water in the water by the sterilizing action of the sterilizing unit 2. Thereafter, the purified water is discharged from the outlet 12.

  The sterilizing unit 2 is formed by supporting cuprous oxide on a photocatalyst. Cuprous oxide is reducible, and the bactericidal ability due to this reducibility is used for water purification. That is, bacteria in water can be sterilized by the reducing power of cuprous oxide. However, cuprous oxide is gradually oxidized in water to change into copper oxide and lose reducibility. Therefore, in the present embodiment, the sacrificial reagent is supplied to the sterilizing unit 2 and the photocatalyst is operated so that the copper oxide is returned to the cuprous oxide again to regenerate and impart the reducibility so as to restore the antibacterial activity. To do. As the photocatalyst, for example, titanium oxide can be used. The shape of the sterilizing part 2 can be a plate shape, a net shape, a rod shape, a fiber shape, or the like.

  A sacrificial reagent supply unit 13 that supplies a sacrificial reagent to the sterilization unit 2 is provided in the water flow unit 1. The sacrificial reagent supply unit 13 is formed by a hollow nozzle that is tapered and tapers toward the tip, and the tip is directed to the sterilization unit 2.

Further, a light emitting unit 16 that irradiates light to the sterilizing unit 2 is provided in the water passing unit 1. The light emitted from the light emitting unit 16 can be ultraviolet light, visible light, infrared light, or the like, but is preferably ultraviolet light. More preferably, the light emitting unit 16 is constituted by an ultraviolet LED. The ultraviolet LED used for the light emitting unit 16 may be anything that irradiates to generate electrons in the photocatalyst, and may be an ultraviolet LED having an output of about 5 mW / cm ² , for example. The light emitting unit 16 is electrically connected to an external power source through an electrical wiring 19.

  Then, both the water inlet valve 17 and the water outlet valve 18 are closed at regular time intervals, and the sacrificial reagent is supplied from the sacrificial reagent supply unit 13 toward the sterilization unit 2 in the closed water passage unit 1. The supply of the sacrificial reagent may be based on the oxidation state of copper, such as when the cuprous oxide is reduced by a predetermined amount or when the copper oxide is increased by a predetermined amount. The sacrificial reagent is preferably supplied by being injected, and more preferably supplied so that the sterilizing unit 2 receives a pressing force during the injection. In that case, the sacrificial reagent can be spread to the sterilization unit 2 more quickly. The supplied sacrificial reagent is dissolved by the water in the water flow section 1. And the copper oxide ion and sacrificial reagent which exist in the disinfection part 2 vicinity form a copper oxide complex. Further, after the sacrificial reagent supply unit 13 is supplied, light, for example, ultraviolet light is irradiated from the light emitting unit 16 toward the sterilization unit 2. Thus, when light is irradiated to the sterilization part 2, since the sterilization part 2 is comprised including the photocatalyst, the copper oxide complex formed in the sterilization part 2 vicinity is reduced with the excitation electron produced | generated in a photocatalyst. Can do. After the reduction, both the water inlet valve 17 and the water outlet valve 18 are opened, and the purification of water is started again in the water passage portion 1 that is in a water passage state. In addition, the water in the water flow section 1 after the reaction by the photocatalyst may flow out from the water outlet 12, or separately from the water outlet 12, the water outlet 1 provided with a drain valve or the like is provided in the water passage section 1. You may drain from the drain. In this case, the water that has entered the water passage 1 from the water inlet 12 for a certain period of time may be discharged from the water outlet to wash the water passage 1.

  Thus, in the above water purifier, water can be sterilized safely and efficiently on the human body by the sterilization action of cuprous oxide. And by applying the sacrificial reagent and the photocatalytic action, the sterilizing action of the sterilizing part 2 can be recovered.

  The sacrificial reagent supply unit 13 is connected by a tube body 15 to a sacrificial reagent storage unit 14 that stores a sacrificial reagent. The tube body 15 can be composed of a hollow pipe or a hose. In this way, by installing the sacrificial reagent storage unit 14, the sacrificial reagent can be supplied when necessary, and the reduction reaction of copper oxide can be performed in a timely manner. The sacrificial reagent storage unit 14 may be provided in the water flow unit 1, but in this embodiment, the sacrificial reagent storage unit 14 is provided outside the water flow unit 1. When the sacrificial reagent storage unit 14 is provided outside the water flow unit 1, the sacrificial reagent can be easily replenished. For example, the sacrificial reagent can be stored in the sacrificial reagent storage unit 14 by removing the cap provided on the upper part of the sacrificial reagent storage unit 14 and injecting the sacrificial reagent from this opening.

  The reduction reaction by the photocatalyst may be performed by computer control, for example. Specifically, for example, when the concentration of copper oxide increases or a predetermined time elapses, a command is issued from the computer to close the water inlet valve 17 and the water outlet valve 18, and to supply the sacrificial reagent from the sacrificial reagent supply unit 13. The sterilizing unit 2 is supplied. And after predetermined time passes, light is irradiated to the sterilization part 2 from the light emission part 16. FIG. Further, after a predetermined time has elapsed, the water inlet valve 17 and the water outlet valve 18 are opened and water flow is resumed. Moreover, you may perform these operation | movement with the timer means which act | operates every predetermined time. A supply mechanism for the sacrificial reagent may employ a pressure change mechanism, a pump mechanism, or the like. For example, the sacrificial reagent storage unit 14 is pressurized so that the sacrificial reagent is pushed out toward the tube body 15, and the sacrificial reagent is ejected from the sacrificial reagent supply unit 13.

  As the sacrificial reagent, methanol, ethanol, formic acid, oxalic acid, acetic acid, ethylenediaminetetraacetic acid, triethanolamine and the like are preferable. In that case, complex formation with copper oxide becomes easy.

  It is preferable that the sterilization part 2 is formed so that attachment or detachment with respect to the water flow part 1 is possible. When it is detachable, even when the cuprous oxide of the sterilization unit 2 deteriorates and regeneration by reduction is not sufficiently performed, the reducibility can be restored by replacing the sterilization unit 2. Moreover, if it can take out from the housing | casing 10, replacement | exchange of the sterilization part 2 will become easy. In particular, the sterilizing unit 2 is preferably a cartridge type that can be easily replaced. The sterilizing unit 2 removed from the housing 10 may be regenerated by applying a sacrificial reagent and light irradiation outside the water purifier.

  When a liquid containing copper (II) ions is mixed with a sacrificial reagent, a complex of copper (II) ions is formed. When light is irradiated in the presence of a photocatalyst, a reaction in which copper (II) ions are reduced to copper ions (I) proceeds. In this embodiment, this reaction can be used to improve the reduction efficiency and regenerate cuprous oxide.

  In addition, in said embodiment, although the example of the washing | cleaning device which flows water into the water flow part 1 continuously and purified water was shown, this embodiment is not limited to this. For example, it may be a batch-type water purifier in which water is stored in the water flow section 1 and sterilized by bringing the water into contact with the sterilization section 2 for a predetermined time, and then water is discharged to purify the water. . In that case, the water inlet 11 and the water outlet 12 may be formed with the same opening.

DESCRIPTION OF SYMBOLS 1 Water flow part 2 Sterilization part 3 Reducing agent supply part 4 Reducing agent storage part 5 Tube 6 Cleaning agent supply part 7 Cleaning agent storage part 8 Pipe 9 Heater 10 Main body part 11 Water inlet 12 Water outlet 13 Sacrificial reagent supply part 14 Sacrificial reagent storage unit 15 Tubing body 16 Light emitting unit 17 Water inlet valve 18 Water outlet valve

Claims (16)

A water passage portion connected to the water inlet and the water outlet and passing water, and a sterilization portion provided inside the water passage portion to sterilize the water that has entered,
The sterilization part is formed including cuprous oxide,
The water purifier in which the reducing agent supply part which supplies the reducing agent which returns a copper oxide to cuprous oxide to the said sterilization part is provided in the inside of the said water flow part.   The said sterilization part is a water purifier of Claim 1 by which the film of a cuprous oxide is formed in the surface of copper material.   The water purifier according to claim 1, wherein the sterilizing unit is a catalyst in which cuprous oxide is supported on a photocatalyst.   The water purifier according to claim 1, wherein the sterilizing part is a binder complex including an inorganic binder and cuprous oxide.   The water purifier according to any one of claims 1 to 4, further comprising a reducing agent storage unit that stores the reducing agent and is connected to the reducing agent supply unit by a pipe body outside the water flow unit. .   The water purifier according to any one of claims 1 to 5, wherein the reducing agent supply unit injects the reducing agent toward the sterilizing unit.   The water purifier according to any one of claims 1 to 6, wherein the reducing agent is a liquid containing an organic acid or an organic acid salt.   The water purifier according to claim 7, wherein the organic acid or organic acid salt is at least one selected from ascorbic acid, gallic acid, tartaric acid, sodium potassium tartrate, and citric acid. A cleaning liquid supply part for supplying a cleaning liquid to the sterilization part is provided inside the water flow part,
The water purifier according to any one of claims 1 to 8, wherein the cleaning liquid is for cleaning the sterilizing unit supplied with the reducing agent.   The water purifier according to claim 9, wherein the cleaning liquid is stored, and a cleaning liquid storage unit connected to the cleaning liquid supply unit by a tubular body is provided outside the water flow unit.   The water purifier according to claim 9 or 10, wherein the cleaning liquid is water.   The water purifier according to any one of claims 1 to 11, wherein the sterilizing unit is detachably formed with respect to the water passing unit.   The water purifier of any one of Claims 1-12 provided with the heater which heats the said sterilization part.   The water purifier of any one of Claims 1-12 provided with the heater which heats the said reducing agent. Connected to an openable and closable water inlet and an openable and closable water outlet, provided with a water passing part for passing water, and a sterilizing part provided inside the water passing part for sterilizing the received water,
The sterilization part is formed by supporting cuprous oxide on a photocatalyst,
A sacrificial reagent supply unit that supplies a sacrificial reagent to the sterilizing unit and a light emitting unit that irradiates light to the sterilizing unit are provided inside the water flow unit,
The sacrificial reagent is dissolved in water to form a copper oxide complex with copper oxide derived from the cuprous oxide,
A water purifier that closes the water inlet and the water outlet, closes the water flow portion, and reduces the copper oxide complex to cuprous oxide by light from the light emitting portion. The water purifier according to claim 15 , wherein the photocatalyst is titanium oxide.

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