CN108474200B

CN108474200B - Method for supplying sterilized water to water-using facility and water-washing toilet

Info

Publication number: CN108474200B
Application number: CN201680078905.8A
Authority: CN
Inventors: 若叶贞彦
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2021-01-05
Anticipated expiration: 2036-01-15
Also published as: CN108474200A; JP6675101B2; JPWO2017122231A1; WO2017122231A1

Abstract

In order to improve the bacteria removing effect compared with the case of supplying the bacteria removing water alone, the water-using equipment provides a method for supplying the bacteria removing water to the water-using equipment and a water-washing toilet. Includes a 1 st step of supplying ordinary water containing no sterilizing component to a portion (50; 150) to be sterilized of an aqueous facility, and a 2 nd step of supplying sterilizing water containing a sterilizing component to the portion to be sterilized.

Description

Method for supplying sterilized water to water-using facility and water-washing toilet

Technical Field

The present invention relates to a method of supplying sterilizing water to a water-using facility and a water-closet bowl.

Background

With the increase of consumers who seek clean and comfortable living environments, there is a demand for inhibiting the occurrence of slime or mold and the proliferation of bacteria by sterilization with respect to water-using equipment in homes.

Conventionally, as a means for sterilizing a water closet in such water facilities, a water closet in which ozone-containing water (sterilizing water) generated by electrolysis is flowed and cleaned has been proposed (japanese patent application laid-open nos. H10-31231 (document 1) and 2010-248786 (document 2)).

In document 2, the following is described: after the water level of the stored water stored in the toilet bowl portion is lowered from the standby time based on a command for starting sterilization of the toilet bowl portion of the toilet bowl main body, ozone-containing water is flowed into the toilet bowl portion and is cleaned. The water-washing toilet can effectively remove bacteria from the part of the toilet bowl part which is stored with water during normal use or standby time, and can prevent the generation of dirt near the waterline of the toilet bowl part.

Disclosure of Invention

Problems to be solved by the invention

However, simply by flowing ozone-containing water to the toilet bowl portion, it is difficult to make the effect of ozone-containing water deep when bacteria are attached to the toilet bowl portion in a layered manner.

That is, when bacteria adhere in layers, ozone-containing water is supplied to such layered bacteria from the surface (outermost layer) side. Therefore, even if the bacteria in the outermost layer can be sterilized, it is difficult to spread the sterilization effect of the ozone-containing water to the deep part of the stacked bacteria.

As described above, from the viewpoint of not only removing bacteria from the surface but also removing bacteria deep into the layered bacteria, improvement of the bacteria removing effect is desired.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method of supplying sterilizing water to a water-using facility, which can improve the sterilizing effect as compared with the case of supplying sterilizing water alone.

Further, it is another object of the present invention to provide a water closet capable of improving a sterilizing effect as compared with a case where sterilizing water is supplied alone.

Means for solving the problems

In order to solve the above problem, a method for supplying sterilized water to a water-using facility according to the present invention includes: a first step of supplying ordinary water containing no sterilizing component to a sterilization target portion of a water-using facility; and a 2 nd step of supplying the sterilization water containing the sterilization component to the sterilization target portion.

The water closet according to the present invention includes: a toilet main body having a toilet bowl portion; a nozzle capable of supplying sterilizing water containing a sterilizing component to a sterilization target portion of the toilet bowl portion; a water supply path capable of supplying ordinary water containing no bacteria-removing component to the toilet bowl portion; a drainage path which can discharge the water stored in the toilet bowl; and a water storage control part capable of controlling the height of the waterline of the water storage of the toilet bowl part. The flush toilet is characterized in that the drainage channel includes a trap part formed so as to be capable of storing the normal water supplied from the water supply channel in the toilet bowl part, and at least a part of the trap part is movable; the sterilization target portion includes a portion below a waterline of the toilet bowl portion during standby for storing water; the water storage control part can control the height of a waterline of water storage of the toilet bowl part by driving the water storage bent part; the water storage control unit may perform control of supplying the sterilization water from the nozzle to the sterilization target portion after supplying the ordinary water to the sterilization target portion in a state where the stored water of the toilet bowl portion is discharged to the drainage path and the sterilization target portion is exposed by the control of the water storage control unit.

Effects of the invention

According to the present invention, the sterilization effect can be improved as compared with the case where the sterilization water is supplied alone.

Drawings

Fig. 1 is a diagram showing an apparatus configuration of an embodiment of a method for supplying sterilized water to a water-using apparatus according to the present invention.

Fig. 2 is a schematic cross-sectional view showing a first embodiment of a method of supplying sterilizing water to a water closet according to a process sequence.

Fig. 3 is a schematic cross-sectional view showing a method of supplying sterilizing water to a water closet according to a second embodiment in order of steps.

Fig. 4 is a schematic cross-sectional view showing a third embodiment of a method of supplying sterilizing water to a water closet according to a process sequence.

Fig. 5 is a schematic cross-sectional view showing a fourth embodiment of a method of supplying sterilizing water to a water closet according to the order of steps.

Fig. 6 is a schematic cross-sectional view showing a fifth embodiment of a method of supplying sterilizing water to a water closet according to the order of steps.

Fig. 7 is a schematic cross-sectional view showing a modification of the first embodiment of the method of supplying sterilized water to the water flush toilet shown in fig. 2.

Fig. 8 is a schematic cross-sectional view showing a modification of the third embodiment of the method of supplying sterilized water to the water flush toilet shown in fig. 4.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The method of supplying sterilized water to an underwater apparatus according to the present embodiment includes a 1 st step and a 2 nd step, wherein the 1 st step supplies ordinary water containing no sterilizing component to a portion to be sterilized of the underwater apparatus, and the 2 nd step supplies sterilized water containing the sterilizing component to the portion to be sterilized after the 1 st step.

Hereinafter, the sterilized water containing the sterilizing component is also simply referred to as "sterilized water". Hereinafter, ordinary water containing no sterilizing component and having a higher water spray pressure than sterilized water will be simply referred to as "ordinary water".

In the present embodiment, the water-using facility is a facility that is required to maintain sanitation, such as a water supply function, a water discharge function, or a water supply and discharge function. Examples thereof include a water closet, a dish washer, a washing machine, a kitchen sink, a hand washer, a wash basin, and a bathtub.

The sterilizing water contains sterilizing components dissolved therein. The bacteria-removing component in the present embodiment is a component contained in water in order to obtain a bacteria-removing effect on bacteria adhering to a bacteria-removing target portion of a water facility. Therefore, components such as residual chlorine contained in the tap water to obtain a bactericidal effect against substances contained in the water (hereinafter, also referred to as "residual chlorine and the like") are not components referred to as the bactericidal components in the present embodiment. Needless to say, this does not mean that the sterilized water does not contain residual chlorine or the like, and the sterilized water may contain residual chlorine or the like.

Specific examples of the sterilization component include ozone and hypochlorous acid. The sterilization water (hereinafter, also referred to as "ozone water") whose sterilization component is ozone can be obtained, for example, by electrolyzing water to generate ozone gas and dissolving the generated ozone gas in water. The sterilized water containing hypochlorous acid as the sterilizing component can be obtained by, for example, electrolyzing water containing NaCl to generate chlorine gas, and reacting the generated chlorine gas with water.

The life of ozone in water is short and the possibility of water pollution is low. In addition, ozone can be generated by electrolyzing water such as tap water as it is. Therefore, in the present embodiment, it is preferable that the sterilization component is ozone.

Ordinary water does not contain the sterilizing components contained in the sterilized water. In addition, it is permissible that residual chlorine and the like be contained in ordinary water. Specific examples of such ordinary water containing no sterilizing component include tap water.

In order to obtain the bacteria-removing effect by the bacteria-removing water, it is necessary that the bacteria-removing water is in direct contact with bacteria, that the bacteria-removing water acts during the time required for the bacteria to be killed, and that the bacteria-removing effect is continued for a long period of time (frequency of application, effect of 1 time). However, bacteria may adhere to a portion to be sterilized of the water treatment facility in a layered manner. Since the bacteria-removing water is supplied from the surface (outermost layer) side to the layered bacteria, the bacteria-removing effect of the bacteria-removing water is high for the bacteria located at the outermost layer, but it is difficult to make the effect of the bacteria-removing water spread to the deep side of the layered bacteria.

Therefore, in the present embodiment, as a means for enhancing the bacteria removing effect by removing bacteria to the deep side of bacteria attached in a layered state, bacteria and dirt in the bacteria removing target portion are washed with ordinary water in advance, and then sterilized water is applied.

That is, the method of supplying sterilized water to the water-using facility according to the present embodiment is based on the following knowledge. That is, the following has been found: by applying ordinary water first, the bacteria are more effectively acted by the sterilizing components contained in the sterilized water than by applying the sterilized water to the bacteria alone. The following knowledge is also based. That is, even if the time for applying the sterilizing water is the same, a difference is observed between the case of applying ordinary water containing no sterilizing component in advance and the case of not applying ordinary water, and the sterilizing effect is improved if the ordinary water is used for washing (flowing over the surface of the bacteria) before the sterilizing water is applied to the bacteria. Further, by supplying the sterilized water to the sterilization target portion of the water use facility after supplying the normal water, the adhesion of bacteria adhering to the sterilization target portion can be weakened by the action of the sterilization component, and the growth of bacteria can be suppressed.

In order to more effectively achieve the effect of supplying the normal water, it is preferable that the supply time of the normal water is set to about 10 seconds to 3 minutes. The supply time of the sterilizing water is preferably about 5 seconds to 3 minutes. Further, the supply of the normal water and the supply of the sterilized water may be performed as 1 cycle, and the cycle may be repeated a plurality of times.

The water jet for supplying the normal water and the sterilized water may be provided at a tip portion of the nozzle or the like, and may be provided at an appropriate position where the water jet can be supplied to the sterilization target portion. Further, in order to allow the ordinary water and the sterilized water to flow or be sprayed to the entire sterilization target portion, a liquid sprayer or a movable nozzle capable of adjusting the direction of spraying water may be provided at the water spray port.

The water outlets for supplying the normal water and the sterilized water can be formed as the same water outlet by using the same nozzle and providing a switching valve for switching the flow paths of the normal water and the sterilized water. Alternatively, for example, the water jet for supplying the normal water and the water jet for supplying the sterilized water may be different from each other by a method of providing a nozzle for supplying the normal water and a separate nozzle for supplying the sterilized water.

In the present embodiment, it is preferable that the normal water to be supplied to the sterilization target portion has a higher water injection pressure than the sterilized water. Here, the water jet pressure refers to the water supply pressure at the water jet port.

When normal water is supplied to a portion to be sterilized from a water jet such as a nozzle, the normal water can be ejected more vigorously than the sterilizing water by setting the water supply pressure, which is the water ejection pressure of the normal water, higher than the sterilizing water.

When the water spray pressure of the normal water is higher than the water spray pressure of the sterilizing water, it is preferable to set the water spray pressure of the sterilizing water to be, for example, 1.2 to 5 times higher. By setting the ratio to 1.2 or more, bacteria and dirt in the vicinity of the surface can be more easily peeled off from the portion to be sterilized. By setting the ratio to 5 or less, splashing of the ordinary water at the sterilization target portion can be suppressed, and scattering of the peeled germs and dirt to the periphery together with the ordinary water can be suppressed.

If the water spray pressure of the ordinary water is higher than the water spray pressure of the sterilization water, the bacteria and dirt on the surface can be washed away from the sterilization target portion by the physical force due to the water potential, or the adhesion of the bacteria on the surface can be weakened, so that the effect of the sterilization water can be easily distributed to the bacteria located inside. Then, by supplying the sterilizing water, the sterilizing component can be more effectively applied to the bacteria inside, and the sterilizing effect can be further improved.

By supplying ordinary water, which is more vigorous than the sterilized water, to the sterilization target portion before supplying the sterilized water in this manner, the sterilization effect can be further improved as compared with the case where the sterilized water is supplied alone or the case where the sterilized water is supplied after the ordinary water is supplied.

According to the method for supplying sterilized water to a water-using facility of the present embodiment described above, by supplying ordinary water to the portion to be sterilized before supplying the sterilized water, it is possible to clean the bacteria and the contaminants in advance, and to spread the effect of the sterilized water to the deep parts of the stacked bacteria. This can improve the sterilizing effect compared to the case of supplying sterilizing water alone. In addition, when the water discharge pressure of the normal water is higher than the water discharge pressure of the sterilizing water, when the normal water is supplied from the water discharge port such as the nozzle toward the portion to be sterilized, the normal water can be discharged with a strong force, and the sterilizing effect by the supply of the sterilizing water after passing can be further improved.

In the present embodiment, the normal water W1 from the water tank 1 and the ozone water (sterilized water W2) from the ozone water generator 2 are supplied from the same nozzle 5 to the sterilization target portion of the water-using facility through the switching valve 4.

As shown in fig. 1, a water tank 1 is connected to a tap water pipe. Tap water from a tap water pipe is supplied to the tank of the water tank 1, and normal water W1 is stored therein.

The ozone water generator 2 is connected to the water tank 1 via a pipe 6 a. A part of the tap water in the tank of the water tank 1 flows into the ozone water generator 2, and ozone gas is generated by electrolysis.

In the ozone water generator 2, the generated ozone gas is dissolved in water to generate ozone water (sterilized water W2). The start and stop of the generation of the normal water W1 in the water tank 1 and the start and stop of the generation of the sterilizing water W2 in the ozone water generator 2 are performed by the nozzle controller 3 electrically connected to the water tank 1 and the ozone water generator 2, respectively.

A switching valve 4 and a nozzle 5 are provided downstream of the water tank 1 and the ozone water generator 2 in this order from the upstream side.

The switching valve 4 is connected to the water tank 1 via a pipe 6b, and is connected to the ozone water generator 2 via a pipe 6 c. The nozzle 5 is connected to the switching valve 4 via a pipe 6 d. The switching valve 4 is a valve that switches to supply one of the normal water W1 and the sterilized water W2 to the nozzle 5.

That is, the switching valve 4 switches between communicating the pipe 6b with the pipe 6d to allow the normal water W1 to flow therethrough and communicating the pipe 6c with the pipe 6d to allow the sterilized water W2 to flow therethrough. The operation of the switching valve 4 is performed by a nozzle control unit 3 electrically connected to the switching valve 4.

The nozzle 5 has a water jet. The water supplied to the nozzle 5 is ejected from the water jet toward the sterilization target portion of the water treatment apparatus. When the water discharge pressure of the normal water W1 is set higher than the sterilizing water W2, the normal water W1 is discharged with a head jerky force than the sterilizing water W2.

The supply of the normal water W1 and the sterilized water W2 to the water-consuming equipment can be performed as follows, for example. First, normal water W1 and sterilized water W2 are generated in the water tank 1 and the ozone water generator 2, respectively.

Next, the switching valve 4 is operated to communicate the pipe 6b with the pipe 6 d. Then, the normal water W1 is discharged from the water discharge port of the nozzle 5, and the normal water W1 is supplied to the sterilization target portion of the water-using device.

After a predetermined time has elapsed, switching valve 4 is actuated to communicate pipe 6c with pipe 6 d. Thus, the water ejected from the water ejection port of the nozzle 5 is switched from the normal water W1 to the sterilized water W2.

The water discharge pressure of the water discharge port of the nozzle 5 can be adjusted according to the degree of opening of the switching valve 4, the pressure of the normal water W1 in the water tank 1, the sterile water W2 in the ozone water generating apparatus 2, and the like. Thus, the water pressure of the normal water W1 and the sterilized water W2 supplied to the sterilization target portion of the water-using facility can be adjusted.

According to the method for supplying sterilized water to a water-using facility of the present embodiment described above, by supplying ordinary water to the portion to be sterilized before supplying the sterilized water, and by washing the bacteria and the contaminants in advance, the effect of the sterilized water can be distributed to the deep parts of the stacked bacteria. This can improve the sterilizing effect compared to the case of supplying sterilizing water alone. In addition, when the water discharge pressure of the normal water is higher than the water discharge pressure of the sterilizing water, when the normal water is supplied from the water discharge port such as the nozzle toward the portion to be sterilized, the normal water can be discharged with a strong force, and the sterilizing effect by the supply of the sterilizing water after that can be further improved.

Further, in the present embodiment, since the single nozzle 5 is used without using different nozzles for supplying the normal water W1 and the sterilized water W2, the facility configuration can be reduced in size and cost.

Next, as a specific example of the method for supplying sterilized water to a water-using facility according to the present invention, an embodiment in which the water-using facility is a water-closet bowl will be described. As described in detail below, in the present embodiment, the sterilization target portion includes a portion of the toilet bowl portion of the flush toilet below the waterline during standby for water storage.

Fig. 2 (a) to 2(d) are schematic cross-sectional views showing a method of supplying sterilizing water to a water closet according to a first embodiment in order of steps. Fig. 3 (a) to 3 (d) are schematic cross-sectional views showing a method of supplying sterilizing water to a water closet according to a second embodiment in order of steps. Fig. 4 (a) to 4 (e) are schematic cross-sectional views showing a method of supplying sterilizing water to a water closet according to a third embodiment in order of steps. Fig. 5 (a) to 5 (f) are schematic cross-sectional views showing a method of supplying sterilizing water to a water closet according to a fourth embodiment in order of steps. Fig. 6 (a) to 6 (f) are schematic cross-sectional views showing a fifth embodiment of a method of supplying sterilizing water to a water closet bowl in the order of steps. In fig. 2 to 6, the same reference numerals are given to the overlapping components, and overlapping descriptions will be omitted below.

As shown in fig. 2 to 6, the water flush toilet 10 of the present embodiment is a chair-type toilet used by a user sitting thereon, and is a so-called western-style toilet. The water flush toilet 10 includes a toilet main body 10a having a toilet bowl portion 11, and a toilet seat and a toilet cover (not shown) that can be placed above the toilet bowl portion 11. The flush toilet 10 further includes a water storage control unit (not shown) that controls the height of a water line for storing water in the toilet bowl 11.

The toilet main body 10a is fixed to the floor of a toilet or the like, for example. The toilet seat and the toilet cover are rotatably attached to one end of the toilet main body 10 a.

The bowl portion 11 of the toilet body 10a is bowl-shaped with an open upper side. The toilet main body 10a includes a water supply path 21 for supplying the normal water W1 to the bowl portion 11 and a water discharge path 22 for discharging the stored water and the like in the bowl portion 11.

The upstream end of the water supply path 21 protrudes outward from the rear portion of the toilet main body 10 a. The upstream end is connected to an external water supply pipe (not shown), and the water supply pipe is pressurized to cause the water supply pipe to flow into the water supply path 21. The downstream end of the water supply path 21 is disposed at the upper end of the toilet bowl 11, and is provided to face the inside of the toilet bowl 11. The downstream end ejects the tap water flowing into the water supply path 21 from the tap water pipe into the bowl portion 11 as washing water. Therefore, the downstream end of the water supply path 21 serves as a water jet unit 21a that jets the normal water W1 to the toilet bowl 11, as shown in fig. 3 (c).

The water supply unit 21a is provided with one water supply path 21, for example. The water jet unit 21a jets the normal water W1 from the upper side of the toilet bowl 11 (including the upper portion of the toilet bowl 11) to the circumferential direction of the toilet bowl 11 (the circumferential direction of the bowl) in plan view. Therefore, the normal water W1 from the spout portion 21a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the bowl portion 11, as indicated by curved arrows in fig. 3 (c). In other words, the water supply path 21 supplies the normal water W1 in a swirling flow from the upper side of the bowl portion 11.

The water supply path 21 is set to a water passage state by opening a water supply valve (not shown) and is set to a water stop state by closing the water supply valve. In other words, the water supply path 21 switches between the water discharge of the normal water W1 to the toilet bowl 11 and the stop of the water discharge by opening and closing the water supply valve. For example, the water feed valve can be constituted by, for example, a stepping motor whose drive is controlled by the water storage control unit, and a valve body that switches between opening and closing and an opening amount when opened by the drive of the stepping motor.

The drainage channel 22 includes a cylindrical portion 22a, a trap portion 22b provided at a downstream end thereof, and a discharge portion (not shown) connected to an external drainage pipe (not shown). The drain passage 22 allows the stored water, waste, and the like in the bowl portion 11 to flow from the tube portion 22a to the drain portion via the trap portion 22b, and to be discharged from the drain portion to the drain pipe. The trap 22b is preferably a so-called rotary trap that can be switched between a water-sealed state (e.g., the state shown in fig. 2 (a)) and a water-discharged state (e.g., the state shown in fig. 4 (b)) by vertical movement (vertical rotation) of the trap tube 22 c. More specifically, as shown in fig. 2a, the trap cylinder 22c is in a posture (water-sealed posture) in which the rear front end thereof is directed upward, and the water flush toilet 10 is in a water-sealed state in which the normal water W1 from the water supply path 21 (water jet unit 21a) can be stored in the toilet bowl unit 11. As shown in fig. 4 (b), the front end of the trap tube 22c on the rear side is rotated downward (water discharge posture), and the flush toilet 10 is in a water discharge state in which the stored water can be discharged to the water discharge path 22. As shown in fig. 2 (b), the front end of the trap cylinder 22c on the rear side is stopped at a position between the water-sealing posture and the water-discharging posture (partial water-discharging posture), and the flush toilet 10 discharges a part of the stored water in the water-sealing state to the water-discharging path 22, and becomes a partial water-sealing state in which the amount of stored water smaller than the water-sealing state can be stored in the toilet bowl portion 11.

The water storage control unit can expose the sterilization target portion 15 below the waterline 12a of the toilet bowl portion 11 during standby of water storage by controlling the height of the waterline of water storage of the toilet bowl portion 11 by driving the water trap portion 22 b. The water storage controller can control the normal water W1 to be supplied to the sterilization target portion 15 and then the sterilization target portion 15 to be supplied with the sterilization target portion 15 exposed, and then supply the sterilization water W2 from the nozzle 13.

More specifically, the water storage control unit is electrically connected to a water supply valve of the water supply path 21, and performs control of opening and closing of the water supply valve and the amount of opening thereof, and drive control of the trap 22b (vertical rotation of the trap cylinder 22 c). The water storage control unit detects a position detection signal as vertical position information of the rear end of the trap cylinder 22c, and based on this, controls such as driving and stopping the trap cylinder 22c, and switching the rotational direction (vertical rotational direction) of the trap cylinder 22c during the driving. Thereby, the trap tube 22c is switched between the water sealing posture, the water discharging posture and the partial water discharging posture.

The water closet 10 further includes a nozzle 13 for supplying the sterilization water W2 to the sterilization target portion 15 of the toilet bowl 11. The nozzle 13 may be configured to be able to supply normal water W1.

The nozzle 13 can be provided at an appropriate position where it can supply the bacteria elimination target portion 15, and in the present embodiment, it is provided at the rear upper side of the toilet bowl portion 11. The nozzle 13 supplies the sterilizing water W2 or the normal water W1 from the water jet 14 at the tip toward the sterilization target section 15. In order to supply the sterilization water W2 and the normal water W1 to the entire sterilization target section 15, a liquid sprayer may be provided at the water spray opening 14, or a movable nozzle capable of adjusting the water spray direction may be provided as the nozzle 13. For example, in the first embodiment shown in fig. 2, the same nozzle 13 is used as a means for supplying the normal water W1 and the sterilized water W2, as in fig. 1.

The sterilization target portion 15 includes the vicinity of the waterline 12a of the toilet bowl portion 11 of the toilet 10 during standby, and when the toilet 10 is in the water-sealed state as described above, water is stored as sealed water in the lower portion of the toilet bowl portion 11. Therefore, even if the normal water W1 is supplied from the water supply path 21 (the water jet unit 21a) or the water jet port 14 to the toilet bowl unit 11 in the water-sealed state, it may be difficult to wash the bacteria and dirt in the bacteria elimination target portion 15 in advance in the portion of the toilet bowl unit 11 below the waterline 12a, and the effect of the bacteria-eliminated water W2 may be distributed to the deep portion of the stacked bacteria. Even if the sterilizing water W2 is supplied from the spout 14 to the toilet bowl portion 11, the sterilizing effect may be reduced in a portion of the toilet bowl portion 11 below the waterline 12 a. That is, since the water is stored as the seal water temporarily by being appropriately sprayed from the water supply path 21 (water spray unit 21a) as the water (washing water) for washing the toilet bowl portion 11, the concentration of the sterilizing water W2 may become thin, and the portion below the waterline 12a during standby may not be sterilized.

Therefore, in the present embodiment, when the sterilization water W2 is supplied to the toilet bowl portion 11, the entire sterilization target portion 15 of the toilet bowl portion 11 is exposed in a state where the water level of the stored water is lowered to the water line 12b below the water line 12a during standby.

The toilet 10 having such a structure supplies the normal water W1 and the sterilized water W2 as follows. The timing and the process time for performing each of the following processes are controlled by the water storage control unit.

< first embodiment >

First, a first embodiment will be described with reference to fig. 2.

As shown in fig. 2 (a), when the flush toilet 10 is in the water-sealed state, the water level of the stored water in the bowl portion 11 of the flush toilet 10 is at the position of the water line 12a during standby. In this case, first, as shown in fig. 2 (b), the trap cylinder 22c is set in a partial water discharge posture. This lowers the water level of the stored water to a water line 12b below the water line 12a during standby, thereby exposing the entire bacteria elimination target portion 15 of the toilet bowl 11.

When a signal instructing the sterilization operation by the supply of the normal water W1 and the sterile water W2 thereafter is input in the water storage control unit in the water-sealed state, the water storage control unit controls the drive of the trap 22b to start the discharge operation. By this control, the trap cylinder 22c is slightly rotated downward to assume a partial drainage posture, and the seal water in the trap part 22b is partially drained. Thus, the water level of the stored water is lowered to the water line 12b below the water line 12a during standby, and the entire sterilization target portion 15 of the toilet bowl 11 is exposed.

Next, as shown in fig. 2 (c), in a state where the water storage is lowered to the water line 12b and the entire bacteria elimination target portion 15 of the toilet bowl portion 11 is exposed, the ordinary water W1 is supplied from the water outlet 14 of the nozzle 13 to the exposed bacteria elimination target portion 15 by the control of the water storage control portion. At this time, since the sterilization target portion 15 is lowered from the water line 12a to the water line 12b during standby and is entirely exposed, the ordinary water W1 from the water discharge port 14 of the nozzle 13 can be directly applied to the entire sterilization target portion 15.

By supplying the ordinary water W1 to the sterilization target portion 15 before supplying the sterilized water W2 described later, the bacteria and the contaminants can be washed in advance, the effect of the sterilized water W2 can be distributed to the deep part of the stacked bacteria, and the sterilization effect can be improved as compared with the case of supplying the sterilized water W2 alone. When the water discharge pressure of the normal water W1 discharged from the water discharge port 14 of the nozzle 13 is higher than the water discharge pressure of the sterilizing water W2, the normal water W1 is discharged more vigorously than the sterilizing water W2. Therefore, the effect of washing the germs and the soil in advance with the normal water W1 and the sterilization effect with the sterilized water W2 can be further improved.

Next, as shown in fig. 2(d), in a state where the stored water is kept lowered to the water line 12b, the bacteria removing water W2 is supplied from the water discharge port 14 of the nozzle 13 to the exposed bacteria removing object portion 15 by the control of the stored water control unit. At this time, since the sterilization target portion 15 is lowered from the water line 12a to the water line 12b during standby and is exposed as a whole, the sterilization water W2 from the water ejection port 14 of the nozzle 13 can be directly applied to the whole sterilization target portion 15.

By the supply of the normal water W1, the bacteria and dirt on the surface of the portion 15 to be sterilized are washed away in advance, or the adhesion of the bacteria on the surface is weakened. Therefore, by supplying the sterilizing water W2 to the sterilization target section 15, the effect of the sterilizing water is easily distributed to the bacteria located inside before the cleaning of the normal water W1, and the sterilizing effect can be improved. When the water discharge pressure of the normal water W1 discharged from the water discharge port 14 of the nozzle 13 is higher than the water discharge pressure of the sterilizing water W2, the bacteria and dirt on the surface of the portion 15 to be sterilized are washed away by the physical force of the water potential or the adhesion of the bacteria on the surface is weakened by the strong normal water W1. Therefore, the bacteria removing effect of the bacteria removing water W2 can be further improved.

After the supply of the sterilizing water W2, as shown in fig. 2 (e), the water line 12b is returned to the water line 12a which is the water level at the time of standby. For example, by turning the trap cylinder 22c upward to assume the water-blocking posture under the control of the water storage control unit, the water supply valve of the water supply path 21 is opened, and the water supply path 21 is switched from the water-blocking state to the water-passing state to carry out the water passage from the water supply path 21 for a predetermined time, whereby the stored water as the water blocking can be returned to the water level 12 a.

By returning the stored water from the water line 12b to the water line 12a, the vicinity of the sterilization target portion 15 to which the sterilization water W2 is applied is immersed in the stored water. Therefore, the sterilizing water W2 is diluted by the stored water to decrease the concentration, and the volatilization of the sterilizing components contained in the sterilizing water W2 can be suppressed.

< second embodiment >

Next, a second embodiment will be described with reference to fig. 3.

In the second embodiment, as shown in fig. 3 (c), the normal water W1 and the sterilized water W2 are supplied in the same manner as in the first embodiment, except that the normal water W1 is supplied from the water supply passage 21.

More specifically, as shown in fig. 3 (a) and 3 (b), the water level of the stored water in the bowl portion 11 of the water flush toilet 10 is first lowered from the position of the water line 12a at the standby time to the water line 12b below the water line 12a, and the entire sterilization target portion 15 of the bowl portion 11 is exposed.

Next, as shown in fig. 3 (c), in a state where the entire sterilization target portion 15 of the toilet bowl portion 11 is exposed, the normal water W1 is supplied from the water jet unit 21a of the water supply path 21 to the exposed sterilization target portion 15 under the control of the water storage controller. At this time, since the normal water W1 discharged from the water discharge portion 21a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the bowl portion 11, the normal water W1 can be directly applied to the entire sterilization target portion 15.

By supplying the ordinary water W1 to the sterilization target portion 15 before supplying the sterilized water W2 in this manner, the bacteria and the contaminants are washed in advance, whereby the effect of the sterilized water W2 can be distributed to the deep part of the stacked bacteria, and the sterilization effect can be improved as compared with the case where the sterilized water W2 is supplied alone. When the water discharge pressure of the normal water W1 discharged from the water discharge unit 21a of the water supply path 21 is higher than the water discharge pressure of the sterilized water W2, the normal water W1 is discharged more rapidly than the sterilized water W2. Therefore, the effect of washing the germs and the soil in advance with the normal water W1 and the sterilization effect with the sterilized water W2 can be further improved.

Next, as shown in fig. 3 (d), in a state where the stored water is kept lowered to the water line 12b, the bacteria removing water W2 is supplied from the water discharge port 14 of the nozzle 13 to the exposed bacteria removing object portion 15 by the control of the stored water control unit. At this time, since the sterilization target portion 15 is lowered from the water line 12a to the water line 12b during standby and is entirely exposed, the sterilization water W2 from the water discharge port 14 of the nozzle 13 can be directly applied to the entire sterilization target portion 15.

By the supply of the normal water W1, the bacteria and dirt on the surface of the portion 15 to be sterilized are washed away in advance, or the adhesion of the bacteria on the surface is weakened. Therefore, by supplying the sterilizing water W2 to the sterilization target section 15, the effect of the sterilizing water is easily distributed to the bacteria located inside before the cleaning of the normal water W1, and the sterilizing effect can be improved. When the water discharge pressure of the normal water W1 discharged from the water discharge unit 21a of the water supply path 21 is higher than the water discharge pressure of the sterilizing water W2, the bacteria and dirt on the surface of the portion 15 to be sterilized are washed away by the physical force of the water potential or the adhesion of the bacteria on the surface is weakened by the strong normal water W1. Therefore, the bacteria removing effect of the bacteria removing water W2 can be further improved.

After the supply of the sterilizing water W2, as shown in fig. 3 (e), the water line 12b is returned to the water line 12a which is the water level at the time of standby.

< third embodiment >

Next, a third embodiment will be described with reference to fig. 4.

In the third embodiment, as shown in fig. 4 (a), normal water W1 is supplied from the water supply path 21 to the bowl portion 11 of the toilet 10 in the water-sealed state. As this step, for example, after the toilet 10 is used, normal water W1 may be ejected from the water ejection unit 21a of the water supply path 21 as water (washing water) for washing the bowl 11. At this time, the normal water W1 discharged from the water discharge portion 21a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the toilet bowl portion 11, and generates a swirling flow together with the accumulated water to spread over the entire bacteria elimination target portion 15.

After a predetermined time has elapsed from the supply of the normal water W1 from the water supply path 21, the trap 22c is set to the water discharge posture and the water closet 10 is set to the water discharge state as shown in fig. 4 (b). For example, the trap cylinder 22c is rotated downward to assume a drainage posture under the control of the water storage controller, and the seal water in the trap 22b is drained. Thus, the accumulated water in the bowl portion 11 is discharged to the drainage path 22.

Next, as shown in fig. 4 (c), in a state where the trap cylinder 22c is rotated upward to be in the partial water discharge posture by the control of the water storage control unit, the normal water W1 is supplied from the water supply path 21, and the stored water is stored in the bowl portion 11 up to the water line 12 b. At this time, the sterilization target portion 15 of the toilet bowl portion 11 is entirely exposed.

Next, as shown in fig. 4 (d), in a state where the water is stored until the water line 12b and the entire bacteria elimination target portion 15 of the toilet bowl portion 11 is exposed, the bacteria elimination water W2 is supplied from the water discharge port 14 of the nozzle 13 to the exposed bacteria elimination target portion 15 by the control of the water storage control unit. At this time, since the entire portion to be sterilized 15 is exposed, the sterilizing water W2 from the water discharge port 14 of the nozzle 13 can be directly applied to the entire portion to be sterilized 15.

After the supply of the sterilizing water W2, as shown in fig. 4 (e), the water line 12b is returned to the water line 12a which is the water level at the time of standby. For example, by turning the trap cylinder 22c upward to assume the water-blocking posture under the control of the water storage control unit, the water supply valve of the water supply path 21 is opened, the water supply path 21 is switched from the water-blocking state to the water-passing state, and the water passage from the water supply path 21 is performed for a predetermined time, whereby the stored water as the water-blocking can be returned to the water level 12 a.

< fourth embodiment >

Next, a fourth embodiment will be described with reference to fig. 5.

In the fourth embodiment, as shown in fig. 5 (d), in a state where the water is stored until the water line 12b and the entire sterilization target portion 15 of the toilet bowl portion 11 is exposed, after the normal water W1 is supplied from the nozzle 13, as shown in fig. 5 (e), the sterilization water W2 is supplied from the nozzle 13. Except for this step, the supply of the normal water W1 and the sterilized water W2 is performed in the same manner as in the third embodiment.

More specifically, as shown in fig. 5 (a), the normal water W1 is first supplied from the water jet unit 21a of the water supply path 21 to the bowl unit 11 of the water closet 10 in the water-sealed state. At this time, the normal water W1 discharged from the water discharge portion 21a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the toilet bowl portion 11, and generates a swirling flow together with the accumulated water to spread over the entire bacteria elimination target portion 15.

After a predetermined time has elapsed from the supply of the normal water W1 from the water supply path 21, the trap 22c is set to the water discharge posture and the water closet 10 is set to the water discharge state as shown in fig. 5 (b). For example, the trap cylinder 22c is rotated downward to assume a drainage posture under the control of the water storage controller, and the seal water in the trap 22b is drained. Thus, the accumulated water in the bowl portion 11 is discharged to the drainage path 22.

Next, as shown in fig. 5 (c), in a state where the trap cylinder 22c is rotated upward to be in the partial water discharge posture by the control of the water storage control unit, the normal water W1 is supplied from the water supply path 21, and the stored water is stored in the bowl portion 11 up to the water line 12 b. At this time, the sterilization target portion 15 of the toilet bowl portion 11 is entirely exposed.

Next, as shown in fig. 5 (d), in a state where the entire sterilization target portion 15 of the toilet bowl portion 11 is exposed, the normal water W1 is supplied from the water discharge port 14 of the nozzle 13 to the exposed sterilization target portion 15 under the control of the water storage control unit. At this time, since the entire portion to be sterilized 15 is exposed, the normal water W1 from the water ejection port 14 of the nozzle 13 can be directly applied to the entire portion to be sterilized 15.

In this way, by supplying the normal water W1 to the sterilization target portion 15 again before supplying the sterilizing water W2 after washing the bowl portion 11, the effect of washing the germs and dirt in advance with the normal water W1 and the sterilizing effect with the sterilizing water W2 can be further improved. When the water discharge pressure of the normal water W1 discharged from the water discharge port 14 of the nozzle 13 is higher than the water discharge pressure of the sterilized water W2, the normal water W1 is discharged more vigorously than the sterilized water W2. Therefore, the effect of washing the germs and the soil in advance with the normal water W1 and the sterilization effect with the sterilized water W2 can be further improved.

Next, as shown in fig. 5 (e), in a state where the stored water is stored until the water line 12b and the entire bacteria elimination target portion 15 of the toilet bowl portion 11 is exposed, the bacteria elimination water W2 is supplied from the water spout 14 of the nozzle 13 to the exposed bacteria elimination target portion 15 by the control of the water storage control unit. At this time, since the entire portion to be sterilized 15 is exposed, the sterilizing water W2 from the water discharge port 14 of the nozzle 13 can be directly applied to the entire portion to be sterilized 15.

After the supply of the sterilizing water W2, as shown in fig. 5 (f), the water line 12b is returned to the water line 12a which is the water level at the time of standby.

< fifth embodiment >

Next, a fifth embodiment will be described with reference to fig. 6.

In the fifth embodiment, as shown in fig. 6 (d), the normal water W1 and the sterilized water W2 are supplied in the same manner as in the fourth embodiment, except that the normal water W1 is supplied from the water supply passage 21.

More specifically, as shown in fig. 6 (a), the normal water W1 is first supplied from the water jet unit 21a of the water supply path 21 to the bowl unit 11 of the water closet 10 in the water-sealed state. At this time, the normal water W1 discharged from the water discharge portion 21a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the toilet bowl portion 11, and generates a swirling flow together with the accumulated water to spread over the entire bacteria elimination target portion 15.

After a predetermined time has elapsed from the supply of the normal water W1 from the water supply path 21, the trap 22c is set to the water discharge posture and the water closet 10 is set to the water discharge state as shown in fig. 6 (b). For example, the trap cylinder 22c is rotated downward to assume a drainage posture under the control of the water storage controller, and the seal water in the trap 22b is drained. Thus, the accumulated water in the bowl portion 11 is discharged to the drainage path 22.

Next, as shown in fig. 6 (c), in a state where the trap cylinder 22c is rotated upward to be in the partial water discharge posture by the control of the water storage control unit, the normal water W1 is supplied from the water supply path 21, and the stored water is stored in the bowl portion 11 up to the water line 12 b. At this time, the sterilization target portion 15 of the toilet bowl portion 11 is entirely exposed.

Next, as shown in fig. 6 (d), in a state where the entire sterilization target portion 15 of the toilet bowl portion 11 is exposed, the normal water W1 is supplied from the water jet portion 21a of the water supply path 21 to the exposed sterilization target portion 15 under the control of the water storage controller. At this time, since the normal water W1 discharged from the water discharge portion 21a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the bowl portion 11, the normal water W1 can be directly applied to the entire sterilization target portion 15.

In this way, by supplying the normal water W1 to the sterilization target portion 15 again before supplying the sterilizing water W2 after washing the bowl portion 11, the effect of washing the germs and dirt in advance with the normal water W1 and the sterilizing effect with the sterilizing water W2 can be further improved. When the water discharge pressure of the normal water W1 discharged from the water discharge unit 21a of the water supply path 21 is higher than the water discharge pressure of the sterilized water W2, the normal water W1 is discharged more rapidly than the sterilized water W2. Therefore, the effect of washing the germs and the soil in advance with the normal water W1 and the sterilization effect with the sterilized water W2 can be further improved.

Next, as shown in fig. 6 (e), in a state where the water is stored until the water line 12b and the entire bacteria elimination target portion 15 of the toilet bowl portion 11 is exposed, the bacteria elimination water W2 is supplied from the water outlet 14 of the nozzle 13 to the exposed bacteria elimination target portion 15 by the control of the water storage control unit. At this time, since the entire portion to be sterilized 15 is exposed, the sterilizing water W2 from the water discharge port 14 of the nozzle 13 can be directly applied to the entire portion to be sterilized 15.

After the supply of the sterilizing water W2, as shown in fig. 6 (f), the water line 12b is returned to the water line 12a which is the water level at the time of standby.

According to the method for supplying sterilized water to a water-using facility of the present embodiment described above, by supplying ordinary water to the portion to be sterilized before supplying the sterilized water, it is possible to clean the bacteria and the contaminants in advance and to spread the effect of the sterilized water to the deep parts of the stacked bacteria. Therefore, the sterilization effect can be improved as compared with the case where the sterilization water is supplied alone. In addition, when the water discharge pressure of the normal water is higher than the water discharge pressure of the sterilizing water, when the normal water is supplied from the water discharge port such as the nozzle toward the portion to be sterilized, the normal water can be discharged with a strong force, and the sterilizing effect by the supply of the sterilizing water thereafter can be further improved.

Further, in the present embodiment, since the ordinary water and the sterilizing water can be directly applied to the sterilization target portion below the waterline during standby, the sterilization target portion can be effectively sterilized, and the cleanness and sanitation of the toilet bowl portion can be improved.

In the present embodiment, a mechanical discharge mechanism toilet stool that performs rotary discharge and has a bellows trap that can be driven to rotate up and down is used, but a flush toilet stool that performs discharge of another type such as a so-called syphon jet type toilet stool may be used instead.

In the present embodiment, a flush toilet in which a part of the discharge mechanism is movable can also be used for a toilet having a fixed discharge mechanism.

The water closet 100 shown in fig. 7 includes a toilet main body 100a having a toilet bowl 110. The toilet main body 100a includes a water supply path 210 for supplying normal water W1 to the toilet bowl 110 and a water discharge path 220 for discharging stored water and the like in the toilet bowl 110.

The water closet 100 includes a nozzle 130 for supplying the sterilizing water W2 to the sterilization target section 150 of the toilet bowl 110. The nozzle 130 may be configured to supply normal water W1.

The flush toilet 100 further includes a water storage control unit (not shown) that controls the height of a water line for storing water in the toilet bowl 110. The water supply path 210, the nozzle 130, and the water storage control unit may have the same configuration as that described with reference to fig. 2, and the description thereof will be omitted below.

The water discharge channel 220 includes a discharge portion 220a, a trap portion 220b, and a trap member 220c extending obliquely upward from the bottom surface 110a of the bowl portion 110. The discharge portion 220a is connected to an external drain pipe (not shown). The trap member 220c is composed of a first trap member 220c1 extending from the bottom surface 110a of the bowl portion 110, and a second trap member 220c2 extending from the upper end of the first trap member 220c 1. The second trap member 220c2 is pivotable toward the discharge portion 220a as shown in fig. 7 (b) with the joint portion 220c3 of the first trap member 220c1 serving as a fulcrum.

In the present modification, as shown in fig. 7 (a), the upper end of the second trap member 220c2 is oriented obliquely upward (water-sealing posture), whereby the trap structure is formed in the trap part 220 b. Thus, the flush toilet 100 is in a water-sealed state in which the normal water W1 from the water supply path 210 can be stored in the bowl portion 110, and the stored water is stored up to the water line 120a during standby. As shown in fig. 7 b, the upper end of the second trap member 220c2 is rotated toward the discharge portion 220a to assume a downward posture (partial drainage posture), whereby a part of the stored water in the bowl portion 110 is discharged into the drainage path 220, and a partial water-sealed state is established in which a smaller amount of stored water than the water-sealed state can be stored in the bowl portion 110. At this time, the water level of the stored water is lowered to a water line 120b below the water line 120a during standby.

In this way, the upper end of the second trap member 220c2 is set to the partial water discharge posture, and the normal water W1 and the sterilization water W2 are supplied from the water spout 140 of the nozzle 130 under the control of the water storage controller in a state where the stored water is lowered to the water line 120b and the entire sterilization target portion 150 of the toilet bowl portion 110 is exposed.

Fig. 8 is a schematic cross-sectional view showing a modification of the third embodiment of the method of supplying sterilized water to the water flush toilet shown in fig. 4. In fig. 8, the same reference numerals are given to the components overlapping with those in fig. 7, and overlapping description will be omitted below.

In the present modification, as shown in fig. 8 (a), the supply of the normal water W1 and the sterilized water W2 is performed in the same manner as in the modification of the first embodiment described above with reference to fig. 7, except that the normal water W1 is supplied from the water supply passage 21.

More specifically, as shown in fig. 8 (a), normal water W1 is first supplied from the water discharge portion 210a of the water supply passage 210 to the bowl portion 110 of the water closet 100 in the water-sealed state. At this time, the normal water W1 discharged from the water discharge portion 210a flows downward while swirling in the circumferential direction along the bowl-shaped inner surface of the toilet bowl portion 110, and generates a swirling flow together with the accumulated water, and spreads over the entire sterilization target portion 150.

In the flush toilet 100, the stored water in the toilet bowl portion 110 is discharged to the water discharge path 220 by supplying the normal water W1 from the water supply path 210 for a predetermined time.

Then, as shown in fig. 8 (b), the upper end of the second trap member 220c2 is rotated toward the discharge portion 220a to assume a partial water discharge posture, whereby the water stored in the toilet bowl portion 110 is lowered to the water line 120 b. In a state where the entire sterilization target portion 150 of the toilet bowl portion 110 is exposed, the sterilization water W2 is supplied from the water jet port 140 of the nozzle 130 to the exposed sterilization target portion 150 under the control of the water storage control unit. At this time, since the entire portion 150 to be sterilized is exposed, the sterilizing water W2 from the water jet 140 of the nozzle 130 can be directly applied to the entire portion 150 to be sterilized.

After the supply of the sterilizing water W2, as shown in fig. 8 (c), the upper end of the second trap member 220c2 is set to a water-sealing posture in which it is directed obliquely upward, and the water line 120b is returned to the water line 120a, which is the water level at the time of standby, by passing water from the water supply path 210 for a predetermined time.

As described above, the method for supplying sterilized water to a water-using facility according to the present invention includes the following steps.

The 1 st step of supplying ordinary water W1 containing no sterilization components to the sterilization target section 15 of the water-using facility.

And a 2 nd step of supplying the sterilization water W2 containing the sterilization component to the sterilization target section 15.

In the method of supplying sterilized water to a water-using facility, the sterilizing component in the 2 nd step is preferably ozone.

In the method of supplying sterilized water to a water-using facility, it is more preferable that the water spray pressure of the normal water in the 1 st step is higher than the water spray pressure of the sterilized water in the 2 nd step.

In the method of supplying the sterilized water to the water-using facility, it is particularly preferable that the water-using facility is the water closet 10, and the sterilization target portion 15 includes a portion of the toilet bowl portion 11 of the water closet 10 that is not more than the waterline 12a during standby for water storage.

The water closet 10 of the present invention includes a toilet main body 10a having a toilet bowl portion 11, and a nozzle 13 capable of supplying sterilizing water W2 containing a sterilizing component to a sterilization target portion of the toilet bowl portion 11. The water closet 10 of the present invention further includes a water supply path 21 capable of supplying normal water W1 containing no bacteria-removing component to the bowl portion 11, a water discharge path 22 capable of discharging the stored water in the bowl portion 11, and a water storage control portion capable of controlling the height of the water line 12a for storing the water in the bowl portion 11.

The drainage channel 22 includes a trap 22b, and the trap 22b is formed so that the normal water W1 supplied from the water supply channel 21 can be stored in the bowl portion 11, and at least a part of the trap 22b is movable. The sterilization target portion 15 includes a portion below the water line 12a of the toilet bowl 11 during standby for water storage. The water storage control unit can control the height of the waterline 12a for storing water in the toilet bowl 11 by driving the trap 22 b. By the control of the water storage control unit, in a state where the stored water in the bowl portion 11 is discharged to the water discharge path 22 and the sterilization target portion 15 is exposed, the water storage control unit can perform control of supplying the sterilization target portion with the sterilization water from the nozzle after supplying the ordinary water to the sterilization target portion.

In this water closet, the nozzle 13 can supply the sterilization water W2 and the normal water W1 containing no sterilization components to the sterilization target portion 15, and the water storage controller can control the nozzle 13 to supply the normal water W1 to the sterilization target portion 15.

The method for supplying sterilized water to a water-using facility and the water closet according to the present invention are not limited to the above-described embodiments.

Examples

The method for supplying sterilized water to an aqueous facility of the present invention will be described below with reference to examples, but the method for supplying sterilized water to an aqueous facility of the present invention is not limited to the following examples.

< example >

Tap water (normal water) and ozone water (sterilizing water) are supplied from the same nozzle to the sterilization target portion. The experimental conditions are as follows.

As an alternative to the water-using facility, a plate obtained by molding an acrylic resin is used. About 106 cladosporium was coated on the surface of the plate as a test sample.

Then, the test sample was supplied with sterilized water for 10 seconds at 5-second intervals after being supplied with normal water for 50 seconds. As the ordinary water, tap water was used, and as the sterilizing water, ozone water in which approximately 2mg/L ozone gas was dissolved in tap water was used. Further, the pressure of the supply of the normal water is 1.5 times that of the supply of the ozone water.

< comparative example >

Only ozone water (sterilizing water) is supplied from the nozzle to the portion to be sterilized. The experimental conditions are as follows.

The same test samples as in examples were supplied with sterilized water for 60 seconds as in examples.

< measurement of residual bacteria ratio >

The bacteria remaining rate of the test samples after each experiment of examples and comparative examples was measured, and the bacteria removing effect was evaluated.

The residual bacteria ratio was calculated as follows. The coated surface of the bacteria of the test sample after each experiment was washed off with the extract, and the liquid was coated on potato dextrose agar medium (PDA medium), cultured and the number of bacteria was measured. Then, the bacteria removal rate was calculated with respect to the number of bacteria in the test sample that was not subjected to bacteria removal.

The ratio of bacteria remaining in the comparative example was 49.4%, compared to 0.01%.

As a result, differences were observed in the numerical values of examples and comparative examples. Thus, it was confirmed that: when the sterilizing water is applied after supplying the normal water, the sterilizing effect is improved as compared with the case where only the sterilizing water is applied.

That is, it is found that bacteria are more likely to be affected by applying ordinary water containing no sterilizing component first than by applying sterilizing water to bacteria in one direction. Further, by applying ordinary water containing no sterilizing component having a higher water spray pressure than sterilizing water containing the sterilizing component, the residual bacteria ratio is significantly reduced as compared with the case of applying sterilizing water alone, even if the time for applying sterilizing water is shortened.

Description of the reference symbols

W1 ordinary water without sterilizing component

W2 sterilized water containing sterilized components

10. 100 water-washing toilet

10a, 100a toilet body

11. 110 bedpan part

12a, 12b, 120a, 120b water line

13. 130 nozzle

14 water jet

15 sterilization target portion

21. 210 water supply path

22. 220 drainage way

22b, 220b trap

Claims

1. A method for supplying sterilizing water to a water closet, characterized in that,

the water flush toilet includes:

a nozzle capable of supplying sterilizing water containing a sterilizing component to a sterilization target portion of the toilet bowl portion;

a water supply path capable of supplying ordinary water containing no bacteria-removing component to the toilet bowl portion; and

a drainage channel which can discharge the water stored in the toilet bowl,

the drainage channel is provided with a water storage bend part at least a part of which is movable,

the trap can be switched to the following postures:

a water-sealing posture for storing the ordinary water in the toilet bowl;

a drainage posture in which the accumulated water in the toilet bowl portion can be drained; and

a partial water discharge posture which is located between the water seal posture and the water discharge posture and can store a smaller amount of stored water in the toilet bowl part than in the water seal posture,

the normal water from the water spraying part arranged in the water supply path flows downwards while rotating along the inner surface of the bowl shape of the toilet bowl part in the circumferential direction,

the supply method is characterized by comprising the following steps:

a 1 st step of supplying the ordinary water from the water spray unit to the portion to be sterilized; and the number of the first and second groups,

a 2 nd step of supplying the sterilizing water from the nozzle to the portion to be sterilized,

the step 2 is performed in a state where the trap is stopped in the partial water discharge posture.

2. The method for supplying sterilized water to a water flush toilet according to claim 1,

the sterilization component in the step 2 is ozone.

3. The method for supplying sterilized water to a water flush toilet according to claim 1,

the water injection pressure of the normal water in the 1 st step is higher than the water injection pressure of the sterilizing water in the 2 nd step.

4. The method for supplying sterilized water to a water flush toilet according to claim 2,

5. The method for supplying sterilized water to a water closet according to any one of claims 1 to 4,

the sterilization target portion includes a portion of the toilet bowl portion of the water flush toilet below the waterline during standby for water storage.

6. A water-washing toilet stool, which comprises a water tank,

the disclosed device is provided with:

a toilet main body having a toilet bowl portion;

a water supply path capable of supplying ordinary water containing no bacteria-removing component to the toilet bowl portion;

a drainage path which can discharge the water stored in the toilet bowl; and

a water storage control part which can control the height of the waterline of the water storage of the toilet bowl part;

the water-washing toilet stool is characterized in that,

the drainage channel is provided with a water storage bend part at least a part of which is movable;

the trap can be switched to the following postures:

a water-sealing posture for storing the ordinary water in the toilet bowl;

the sterilization target portion includes a portion below a waterline of the toilet bowl portion during standby for storing water;

the water storage control part can control the height of a waterline of water storage of the toilet bowl part by driving the water storage bent part;

the water storage control unit may perform control of supplying the sterilization water from the nozzle to the sterilization target portion in a state in which the normal water is supplied from the water spray unit to the sterilization target portion and the trap is stopped in the partial water discharge posture, in a state in which the stored water of the toilet bowl portion is discharged to the drainage path and the sterilization target portion is exposed by the control of the water storage control unit.

7. The water closet as defined in claim 6,

the nozzle can supply the sterilization water and normal water containing no sterilization component to the sterilization target portion, and the water storage control unit can perform control of supplying the normal water from the nozzle to the sterilization target portion.