JP2007319801A - Washing method of circulating water-purifying system, and circulating water-purifying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing method of a circulating water-purifying system by which washing can be carried out in a short time, and to provide a circulating water-purifying system. <P>SOLUTION: A filtering device 12 is back washed by using bath water Wo stored in a bathtub 11, and then the bath water Wo remaining in the bathtub 11 is mixed with an antiseptic solution LM. By using the bath water Wo mixed with the antiseptic solution LM, pipes 12a, 12b, 15, 16, 17, 19, 20, and the filtering device 12 through which the bath water Wo flows during a normal operation (filtration operation) are disinfected. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for cleaning a circulating water purification apparatus and a circulating water purification apparatus.

  Conventionally, for example, a circulating water purification apparatus that purifies and reuses bath water such as hot water and hot spring water stored in a large bathtub is known. In general, a circulating purification device is provided with a filtration device in a flow path, and the filtration device removes and purifies the precipitate of the suspension contained in the bath water, and the purified bath water is purified again. The bath water can be used for a long time by sending it back to the bathtub (see, for example, “Patent Document 1”).

By the way, with this kind of circulating water purification device, the water distribution pipes and filtration devices that make up the flow path are periodically disinfected and cleaned to remove various bacteria such as coliform bacteria and Legionella spp. There is a need to. Therefore, sodium hypochlorite having a bactericidal action is mixed in the bath water in the bathtub, and the piping and the inside of the filtration device are sterilized by performing a filtration operation with the bath water mixed with the disinfectant. . Then, the suspension accumulated in the filtration device is removed by backwashing with the bath water used for the filtration operation.
JP 2004-337739 A

  However, in the above circulating water purification method, in order to remove sodium hypochlorite remaining in the piping and the filtration device by the backwashing process, after the backwashing process, the bath is once filled with water, and the backwashing process is performed again. By doing so, sodium hypochlorite was rinsed off. And after that, water is stretched in the bathtub again and used as bath water.

  For this reason, there existed a problem that washing | cleaning of a circulating water purification apparatus required a lot of time. In particular, in recent years, bathtubs tend to increase in size with the spread of large bath facilities such as spas, so that the length of the cleaning time is prominent.

  Then, an object of this invention is to provide the washing | cleaning method of a circulating water purification apparatus and a circulating water purification apparatus which can wash | clean in a short time.

  The invention according to claim 1 is filtered by the water intake pipe for taking water stored in the water tank, the filtration apparatus for filtering the water taken through the intake pipe, and the filtration apparatus. In a cleaning method of a circulating water purification apparatus comprising a water supply pipe for supplying treated water to the water tank, a removal step of removing suspended matter in the water accumulated in the filtration apparatus with water stored in the water tank; A disinfection step of disinfecting the water intake pipe, the water supply pipe, and the filter device by passing a disinfectant through the water intake pipe, the water supply tube, and the filter device after removing the suspension in water. This is the summary.

  The invention according to claim 2 is the cleaning method of the circulating water purification apparatus according to claim 1, wherein the disinfection step includes a first disinfection step of disinfecting the intake pipe and the water supply pipe, the intake pipe, The present invention includes a second disinfection step of disinfecting the inside of the filtration device after disinfecting the inside of the water supply pipe.

According to a third aspect of the present invention, in the method for cleaning a circulating water purification apparatus according to the second aspect, the first disinfecting step includes a minimum amount of water that fills the water intake pipe and the water supply pipe in the water tank. The gist is that the disinfectant is supplied when the water is stored and the water tank, the water intake pipe, and the water supply pipe are circulated.

Invention of Claim 4 is the washing | cleaning method of the circulating water purification apparatus as described in any one of Claims 1-3. WHEREIN: The said disinfectant has the neutralization property which neutralizes with the said water. Is the gist.
The gist of the fifth aspect of the present invention is the cleaning method of the circulating water purification apparatus according to the fourth aspect, wherein the disinfectant contains a mixture of sodium hypochlorite and dilute hydrochloric acid.

  Invention of Claim 6 was filtered by the intake pipe which takes in the water stored in the aquarium, the filtration apparatus which filters the said water taken through the said intake pipe, and the said filtration apparatus A circulating water purification apparatus comprising a water supply pipe for supplying treated water to the water tank, and communicating with the water intake pipe and storing a disinfectant, and the stored disinfectant is filtered by the water stored in the water tank. The gist is that a disinfectant supply unit that can supply the intake pipe after removing the suspended matter in water accumulated in the apparatus is provided.

  The invention according to claim 7 is the circulating water purification apparatus according to claim 6, wherein the water tank determines whether or not a sufficient amount of water filling the water intake pipe and the water supply pipe is stored in the water tank. The gist of the invention is that it includes a storage amount measuring means.

The invention according to claim 8 is the circulating water purifier according to claim 6, wherein the water tank includes a storage means for storing a sufficient amount of water to fill the intake pipe and the water supply pipe. To do.
(Function)
According to the first aspect of the present invention, after the suspended matter accumulated in the filtration device is removed by the water stored in the aquarium and the polluted water containing the suspended matter is discharged, the water remaining in the aquarium Each water intake pipe, water supply pipe, and filtration device was disinfected by mixing a disinfectant into the water. Therefore, it is not necessary to perform a filtration operation using bath water containing a disinfectant as in the prior art. As a result, the circulating water purification apparatus can be washed in a short time.

  According to the second aspect of the present invention, the disinfection of the intake pipe and the water supply pipe and the disinfection process of the filter device are performed separately, so that the concentration of the disinfectant flowing through the intake pipe and the water supply pipe is passed through the filter device. Can be different from the agent. Therefore, for example, when sodium hypochlorite is used as the disinfectant, the concentration of the disinfectant flowing through the filter device is made higher than the concentration of the disinfectant flowing through the intake pipe and the water supply pipe to ensure the filter device. While being able to disinfect, it is possible to reduce the amount of sodium hypochlorite remaining in the intake pipe and the water supply pipe, thereby suppressing the odor peculiar to sodium hypochlorite from remaining.

  According to the third aspect of the present invention, a high-concentration disinfectant can be circulated in the intake pipe and the water supply pipe by introducing the disinfectant into the amount of water sufficient to fill the intake pipe and the water supply pipe. it can. As a result, the bacteria in the intake pipe and the water supply pipe can be surely sterilized. Further, for example, in a circulating water purification apparatus in which a water collecting pipe or a water supply pipe is provided with a pump for circulating water stored in a water tank, air is not mixed in the pump. As a result, it is possible to suppress an abnormal noise caused by the air sucked by the pump and a burden on the operation. As a result, it is possible to improve the quietness and safety at the time of cleaning the circulating water purification device.

According to the invention described in claim 4, the disinfectant is immediately neutralized with water. Therefore, as in the prior art, in order to rinse off the disinfectant remaining in the water intake pipe, the water supply pipe, and the filtration device, it is not necessary to apply water to the water tank again and to flow it through the water intake pipe, the water supply pipe, and the filtration device. As a result, the water tank can be used by filling the water tank after the disinfection treatment, so that the circulating water purification apparatus can be washed in a short time.

According to the invention described in claim 5, a conventionally known mixture of sodium hypochlorite and dilute hydrochloric acid can be used without developing a new disinfectant as a disinfectant.
According to the invention described in claim 6, after the suspended matter accumulated in the filtration device is removed by the water stored in the aquarium and the polluted water containing the suspended matter is discharged, the water remaining in the aquarium Each water intake pipe, water supply pipe, and filtration device was disinfected by mixing a disinfectant into the water. Therefore, it is not necessary to perform a filtration operation using bath water containing a disinfectant as in the prior art. As a result, the circulating water purification apparatus can be washed in a short time.

  According to the seventh aspect of the present invention, it can be seen that the amount of water sufficient to fill the water intake pipe and the water supply pipe is stored in the water tank by the storage amount measuring means. Then, when a sufficient amount of water is stored in the water tank to fill the intake pipe and the water supply pipe, the high concentration disinfectant can be circulated through the intake pipe and the water supply pipe. As a result, the inside of the water intake pipe and the water supply pipe can be surely sterilized.

  According to the eighth aspect of the present invention, a high-concentration disinfectant can be circulated through the water pipe and the water supply pipe by introducing the disinfectant into the amount of water stored in the storage means. As a result, the inside of the water intake pipe and the water supply pipe can be surely sterilized.

(First embodiment)
Hereinafter, one embodiment which materialized the circulating water purification apparatus of the present invention is described according to drawings.
A circulating water purification apparatus 10 shown in FIG. 1 includes a bathtub 11 as a water tank, a filtering device 12, and a storage amount measurement unit 13 and a disinfectant supply unit 14 as storage amount measurement means. Moreover, the circulating water purification apparatus 10 is provided with various piping which connects between each bathtub 11, the filtration apparatus 12, and the disinfectant supply part 14, the valve | bulb etc. which control the communication between each piping.

  Specifically, as shown in FIG. 1, the bathtub 11 has a substantially rectangular shape, and a water intake port Qa is provided on the bottom surface 11a, and one end of the water intake pipe 15 is connected to the water intake port Qa. Yes. In addition, a water supply port Qb is provided on one side surface 11b of the bathtub 11, and one end of a water supply pipe 16 is connected to the water supply port Qb.

  The other end of the intake pipe 15 is connected to the first discharge pipe H1 via the second valve B2. The other end of the intake pipe 15 is connected to the water inlet of the first pump P1 via the first valve B1. One end of a drain pipe 17 is connected to the drain port of the first pump P1, and the other end of the drain pipe 17 is connected to a pipe 19 via a butterfly valve 18 including a check valve, a flow meter T, and the like. A switching valve Bs is provided at one end of the pipe 19.

  The switching valve Bs is connected to the raw water supply port Ga of the filtration device 12 via the water suction pipe 12a of the filtration device 12, and is also connected to the treated water discharge port of the filtration device 12 via the drain pipe 12b of the filtration device 12. It is connected to Gb. The drain pipe 12b is connected to the first drain pipe 21 via the fifth valve B5 at the predetermined position. The first drain pipe 21 is connected to the first discharge pipe H1.

  The switching valve Bs is connected to one end of the bypass pipe 20. The other end of the bypass pipe 20 is connected to the water supply pipe 16 through a third valve B3. The other end of the bypass pipe 20 is connected to the third drain pipe 23 via the fourth valve B4. The third drain pipe 23 is connected to the first discharge pipe H1. Furthermore, the switching valve Bs is connected to one end of the second drain pipe 22. The other end of the second drain pipe 22 is connected to the second discharge pipe H2.

  The switching valve Bs is controlled to be switched to various modes in accordance with an operation signal from a control unit (not shown). For example, when an operation signal indicating normal operation (filtering operation) is input from the control unit, the switching valve Bs communicates the pipe 19 and the water absorption pipe 12a and communicates the drain pipe 12b and the bypass pipe 20 with each other. (Hereinafter referred to as “filtering operation mode”).

  When an operation signal indicating backwash operation is input from the control unit, the switching valve Bs causes the pipe 19 and the drain pipe 12b to communicate with each other, and allows the water absorption pipe 12a and the second drain pipe 22 to communicate with each other. (Hereinafter referred to as “backwash operation mode”).

  Further, when an operation signal indicating that the filtration device is cleaned is input from the control unit, the switching valve Bs causes the pipe 19 and the water suction pipe 12a to communicate with each other and allows the drain pipe 12b and the second drain pipe 22 to communicate with each other. (Hereinafter referred to as “filtering device cleaning mode”).

Furthermore, when an operation signal indicating pipe cleaning is input from the control unit, the switching valve Bs causes the pipe 19 and the bypass pipe 20 to communicate with each other (hereinafter referred to as “pipe cleaning mode”).
In the present embodiment, the filtration device 12 is a known sand filtration device, and is filled with a sand-like filter material (not shown). The filtration device 12 has a substantially cylindrical shape, and the raw water supply port Ga is provided at the upper portion thereof, and the treated water discharge port Gb is provided at the lower portion thereof. Then, when the bath water Wo is supplied from the raw water supply port Ga, the filtering device 12 performs a treatment on the bath water Wo by the filtering material to remove suspended matter in the bath water Wo (FIG. 2). And the treated water W1 is discharged from the treated water discharge port Gb.

  The bathtub 11 is provided with a fresh water supply pipe Lo. One end of the new water supply pipe Lo is connected to the new water distribution pipe H3, and new bath water Wo supplied through the new water distribution pipe H3 is supplied to the bathtub 11.

  The storage amount measuring unit 13 includes a water level gauge 13a and a detector K. The water level gauge 13a is for measuring the bath water Wo stored in the bathtub 11, and outputs a signal S corresponding to the water level of the bath water Wo to the detector K.

The detector K includes a ROM, a CPU (not shown), a RAM for temporarily storing calculation results of the CPU, a notification unit, and the like. The ROM of the detector K stores in advance a minimum amount of bath water Wo that can fill the intake pipe 15 and the water supply pipe 16 (hereinafter referred to as “minimum bath water amount”). The CPU of the detector K calculates the amount of bath water Wo stored in the bathtub 11 from time to time based on the signal S input from the water level gauge 13a, and the calculation result and the minimum bath water amount stored in the ROM. Compare And the amount of the bath water Wo stored in the bathtub 11 is
When it coincides with the minimum amount of bath water, a signal to that effect is output to the above-mentioned external control unit (not shown), and the result to that effect is notified via the notification means. This notification means is, for example, a lamp or an alarm sound.

Here, the sum total of the lengths of the drain pipe 17, the pipe 19, and the bypass pipe 20 is sufficiently shorter than the sum of the lengths of the intake pipe 15 and the water supply pipe 16. Therefore, when the amount of the bath water Wo stored in the bathtub 11 coincides with the minimum bath water amount, the bath water Wo is almost the same as the bathtub 11 → the intake pipe 15 → the drain pipe 17 → the pipe 19 → the bypass pipe 20 → the water supply pipe 16. → When the bath 11 is circulated through the route, the minimum amount of bath water Wo can be circulated without air mixing on the way.

The disinfectant supply unit 14 includes a disinfectant generating device 14A, a disinfectant storage tank 14B, a second pump P2, and a sixth valve B6. The disinfecting liquid generating device 14A is for generating a disinfecting liquid LM as a disinfectant. In this embodiment, the disinfectant LM is a disinfectant having a neutralizing property that is neutralized by an oxidation-reduction reaction when contacted with the bath water Wo. In this embodiment, the disinfectant LM is a mixture of sodium hypochlorite and dilute hydrochloric acid in a ratio of 2: 1. The mixing ratio of sodium hypochlorite and dilute hydrochloric acid is not limited to the above ratio, and may be appropriately changed depending on the pH value of the bath water Wo. And the disinfectant production device 14
A supplies the generated disinfecting liquid LM to the disinfecting liquid storage tank 14B.

  The disinfectant storage tank 14B is connected to one end of the pipe 24 via the second pump P2 and the sixth valve B6. The other end of the pipe 24 is connected to the intake pipe 15. Then, by driving the second pump P2 at the timing when the sixth valve B6 is opened, the disinfecting liquid LM stored in the disinfecting liquid storage tank 14B is supplied to the intake pipe 15 through the pipe 24.

In the present embodiment, the pipes 15 to 23 are made of a resin made of vinyl chloride.
Next, the washing | cleaning method of the circulating water purification apparatus 10 mentioned above is demonstrated according to FIGS.

Normal operation (filtration operation)
First, the case where the circulating water purification apparatus 10 is normally operated will be described with reference to FIG. The normal operation is a state in which a predetermined amount of bath water Wo is stored in the bathtub 11 and the bath water Wo in the bathtub 11 is purified by the filtering device 12 and the purified treatment is performed again. This is a filtration operation state in which the water W1 is sent back to the bathtub 11 and used as the bath water Wo.

  In this case, an operation signal indicating normal operation (filtration operation) is output from the control unit (not shown), and the switching valve Bs is set to the filtration operation mode. Further, the first valve B1 and the third valve B3 are manually opened, and the second valve B2, the fourth valve B4, and the fifth valve B5 are closed. Further, the control unit drives the first pump P1. At this time, the sixth valve B6 (see FIG. 1) is manually closed and the second pump P2 is stopped.

Then, as shown in FIG. 2, the bath water Wo in the bathtub 11 is supplied to the filtration device 12 from the raw water supply port Ga through the route of intake pipe 15 → drainage pipe 17 → pipe 19 → water absorption pipe 12a. . The bath water Wo is filtered and purified by the filtration device 12, and the purified treated water W1 is discharged from the treated water discharge port Gb. The drain pipe 12b → the bypass pipe 20
→ Supplied to the bathtub 11 through a regular route called a water supply pipe 16. Therefore, since the treated water W1 is supplied to the bathtub 11, the bath water from which the suspended solids are removed is continuously supplied to the bathtub 11.

Washing operation (back washing operation)
Next, when the circulating water purification apparatus 10 is washed, first, an operation signal indicating backwashing operation is output from the control unit (not shown) to set the switching valve Bs to the backwashing operation mode. At this time, the third valve B3 is manually closed.

Then, as shown in FIG. 3, the bath water Wo in the bathtub 11 is supplied to the filtration device 12 from the treated water discharge port Gb through the route of the intake pipe 15 → the drain pipe 17 → the pipe 19 → the drain pipe 12 b. . The filtration device 12 is back-washed with the bath water Wo, and the contaminated water W2 containing the suspension adhering to the filtering material in the filtration device 12 is discharged from the raw water supply port Ga.
a → Discharged to the second discharge pipe H <b> 2 through the second drain pipe 22. As a result, the suspension deposited on the filtration device 12 is removed from the filtration device 12 (removal step).

Subsequently, the first pump P1 is stopped, the first valve B1 is manually closed, and the second, third, fourth, and fifth valves B2, B3, B4, and B5 are opened.
Then, as shown in FIG. 4, the bath water Wo in the bathtub 11 is discharged to the first discharge pipe H <b> 1 through the intake pipe 15 and at the same time through the water supply pipe 16 and the third drain pipe 23. 1 is discharged to the discharge pipe H1. As a result, the amount of bath water Wo in the bathtub 11 begins to gradually decrease. Further, the bath water Wo stored in the filtering device 12 is drained through the first drain pipe 21 to the first discharge pipe H1.

Pipe cleaning (first disinfection process)
After a while, as shown in FIG. 5, the amount of bath water Wo in the bathtub 11 becomes the minimum amount of bath water Wo (minimum bath water amount) sufficient to fill the intake pipe 15 and the water supply pipe 16. Then, detector K
Detects that fact and notifies the fact by the notifying means. In response to this, an operation signal to the effect of pipe cleaning is output from the control unit (not shown) to set the switching valve Bs to the pipe cleaning mode. Further, the first valve B1 is manually opened, and the second valve B2, the fourth valve B4, and the fifth valve B5 are closed. Further, the first pump P1 is driven. Furthermore, the sixth valve B6 is manually opened and the second pump P2 (see FIG. 1) is driven.

Then, the disinfecting liquid LM is supplied from the disinfecting liquid storage tank 14 </ b> B (see FIG. 1) to the intake pipe 15 through the pipe 24. As a result, after the disinfecting liquid LM and the bath water Wo are merged in the intake pipe 15, the bath water Wo containing the disinfecting liquid LM is drained pipe 17 → pipe 19 → bypass pipe 20 → water supply pipe 1
It circulates in the normal route of 6-> bathtub 11-> intake pipe 15. At this time, the amount of the bath water Wo that circulates through each pipe is almost the minimum amount (minimum bath water amount) that fills the intake pipe 15 and the water supply pipe 16. Accordingly, since the disinfecting liquid LM circulates at a high concentration, the bacteria in the intake pipe 15, the drain pipe 17, the pipe 19, the bypass pipe 20, the water supply pipe 16, and the bathtub 11 are disinfected (first disinfection step). Further, air is not mixed in the middle of the circulation path.

In the present embodiment, the bath water Wo containing the disinfecting liquid LM has a drain pipe 17 → pipe 19 → bypass pipe 20 → water supply pipe 16 → tub 11 → water intake pipe 15 in the scale of the circulating water purification apparatus 10 (for example, Depending on the pipe length of each of the pipes 15 to 23, for example, it is performed only for a period of refluxing about 3 to 6 times. By doing in this way, each water intake pipe 15, the drain pipe 17, the piping 19, the bypass pipe 20, the water supply pipe 16, and the disinfection process in the bathtub 11 can be performed reliably.

  Subsequently, the first valve B1 is manually closed and the second and fourth valves B2 and B4 are opened. Further, the first pump P1 is stopped. Further, the sixth valve B6 (see FIG. 1) is closed and the second pump P2 is stopped.

Then, as shown in FIG. 6, the bath water Wo in the bathtub 11 is discharged to the first discharge pipe H <b> 1 through the intake pipe 15 and simultaneously through the water supply pipe 16 and the third drain pipe 23. 1 is discharged to the discharge pipe H1. As a result, the amount of bath water Wo in the bathtub 11 gradually decreases and disappears after a while.

Filtration device cleaning (second disinfection process)
Next, an operation signal for washing the filter device is output from the control unit (not shown), and the switching valve Bs is set to the filter device washing mode. Further, the first valve B1 and the sixth valve B6 (see FIG. 1) are manually opened, and the second, third, and fourth valves B2, B3, and B4 are closed. Further, the first pump P1 and the second pump P2 (see FIG. 1) are driven.

  Then, as shown in FIG. 7, the disinfecting liquid LM is supplied from the disinfecting liquid storage tank 14 </ b> B (see FIG. 1) to the intake pipe 15 through the pipe 24. Then, the disinfectant LM is supplied to the filtration device 12 from the raw water supply port Ga through a route of intake pipe 15 → drainage pipe 17 → pipe 19 → water absorption pipe 12a. Then, the disinfectant LM passes through the filtration device 12 and is discharged from the treated water discharge port Gb, and is drained to the second discharge pipe H2 through the drain pipe 12b → the second drain pipe 22.

As a result, the undiluted disinfecting liquid LM (stock solution) flows to the filtering device 12, so that the inside of the filtering device 12 is disinfected in a short time.
Thereafter, an operation signal indicating filtration operation is output from the control unit (not shown) to set the switching valve Bs to the filtration operation mode. Further, the first valve B1 and the third valve B3 are manually opened. Further, the sixth valve B6 is closed and the second pump P2 is stopped. Then, new bath water Wo is supplied to the bathtub 11 through the new water distribution pipe H3. Then, the first pump P1 is driven. Then, the bath water Wo in the bathtub 11 is purified by the filtration device 12, and again,
The purified treated water W1 is sent back to the bathtub and can be used as bath water Wo.

As described above, according to the present embodiment, the following operational effects are obtained.
(1) According to the present embodiment, after the filtration device 12 is back-washed using the bath water Wo, the disinfecting liquid LM is mixed into the bath water Wo remaining in the bathtub 11, and the bath for which the disinfecting liquid LM is mixed. The water Wo was used to disinfect the tubes 12a, 12b, 15, 16, 17, 19, 20 and the filtration device 12 through which the bath water Wo flows during normal operation (filtration operation). Therefore, since the filtration operation is not performed using the bath water mixed with the disinfectant as in the prior art, the circulating water purification apparatus can be washed in a short time.

(2) According to the present embodiment, when the minimum amount of bath water Wo (minimum amount of bath water) that fills the intake pipe 15 and the water supply pipe 16 is stored in the bathtub 11, the disinfecting liquid LM is removed from the water pipe 15. To supply. Then, the bath water Wo mixed with the disinfectant LM is added to the bathtub 11 → the intake pipe 15 →
It was made to circulate through the normal route of the drain pipe 17-> piping 19-> bypass pipe 20-> water supply pipe 16-> bathtub 11 respectively. Therefore, the high-concentration disinfectant LM can be allowed to flow into the intake pipe 15, the drain pipe 17, the pipe 19, the bypass pipe 20, and the water supply pipe 16 without mixing air in the middle thereof. As a result, the tubes 15, 17, 19, 20, and 16 can be surely sterilized.

  Further, since air is not mixed into the first pump P1, the air sucked by the first pump P1 does not make an abnormal sound and does not impose a burden on its driving. As a result, it is possible to improve the quietness and safety during the cleaning of the circulating water purification apparatus 10.

(3) According to the present embodiment, the bath water Wo mixed with the disinfectant LM is used as the bath 11 → the intake pipe 1.
The pipes 15, 17, 19, 20, 16 were sterilized by circulating in the normal route of 5 → drain pipe 17 → pipe 19 → bypass pipe 20 → water supply pipe 16 → bathtub 11. Thereafter, the disinfectant LM was sterilized by flowing the drainage pipe 17 → the pipe 19 → the water absorption pipe 12a → the filtration apparatus 12 → the drainage pipe 12b → the second drainage pipe 22 in a normal path. By doing in this way, since the stock solution of disinfectant LM which is not diluted with bath water Wo can be poured into filtration device 12, the inside of filtration device 12 can be sterilized reliably in a short time.

(4) According to the present embodiment, a disinfecting liquid in which sodium hypochlorite and dilute hydrochloric acid are mixed at a predetermined concentration is used as the disinfecting liquid LM. Therefore, since the disinfectant LM is immediately neutralized when it comes into contact with the bath water Wo, it is not necessary to rinse away the disinfectant remaining in the water intake pipe 15, the water supply pipe 16 and the filter device 12 as in the prior art. As a result, since the bath water Wo can be used in the bathtub 11 immediately after the disinfection treatment, the circulating water purification apparatus 10 can be cleaned in a short time.

  (5) According to the present embodiment, a known disinfectant solution in which sodium hypochlorite and dilute hydrochloric acid are mixed at a predetermined concentration is used as the disinfectant solution LM. As a result, since it is not necessary to develop a new disinfectant as a disinfectant, the circulating water purification apparatus 10 can be washed at a low cost.

(6) According to the present embodiment, the water level gauge 13 a is provided in the bathtub 11. In addition, a detector K is provided to notify that when the bath water Wo measured by the water level gauge 13a becomes the minimum amount that satisfies the intake pipe 15 and the water supply pipe 16. Therefore, the high concentration disinfectant LM can be supplied into the intake pipe 15 and the water supply pipe 16 without mixing air in the middle thereof.
(Second Embodiment)
Next, 2nd Embodiment which actualized the circulating water purification apparatus of this invention is described according to FIG. The present embodiment is characterized in the shape of the bathtub, and is different from the circulating water purification apparatus according to the first embodiment in that the water level gauge 13a and the detector K are not provided accordingly. This is the same as the embodiment.

  Specifically, the bathtub 25 of the present embodiment has a recess 25a as a storage means on the bottom surface 11a. A second water intake Qao is provided on the bottom surface 26 of the recess 25a. The second water intake port Qao communicates with the water intake pipe 15.

  And this recessed part 25a is designed beforehand so that the volume (part shown with the oblique line in FIG. 8) may correspond with the minimum amount of bath water of the bath water Wo mentioned above. Accordingly, it is visually confirmed that the remaining amount of the bath water Wo has filled the recess 25a, and the disinfecting liquid LM is supplied to the water pipe 15 at this timing, so that air is not mixed in the middle. It becomes possible to circulate the concentration disinfectant LM in the intake pipe 15, the drain pipe 17, the pipe 19, the bypass pipe 20, and the water supply pipe 16.

Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.
As described above, according to the present embodiment, the following operational effects are obtained.

(1) According to this embodiment, it is visually confirmed that the remaining amount of the bath water Wo fills the recess 25a, and the disinfectant LM is supplied to the water pipe 15 at this timing. Accordingly, the tubes 15, 17, 19, 20, and 16 can be surely sterilized without providing the water level gauge 13a and the detector K.
(Third embodiment)
Next, 3rd Embodiment which actualized the circulating water purification apparatus of this invention is described according to FIG.

  As shown in FIG. 9, in the present embodiment, the pipe 24 connecting the sixth valve B6 of the disinfectant supply unit 14 and the intake pipe 15 has one end of the second pipe 24a at a predetermined position. It is connected. The other end of the second pipe 24 a is connected to the bypass pipe 20.

  Accordingly, the disinfecting liquid LM stored in the disinfecting liquid storage tank 14B is supplied to the intake pipe 15 and the bypass pipe 20 by driving the second pump P2 at the timing when the sixth valve B6 is opened.

As a result, in the pipe cleaning (first disinfection treatment) step, the disinfecting liquid LM is supplied from the disinfecting liquid storage tank 14B to the intake pipe 15, and the bath water Wo containing the disinfecting liquid LM is supplied to the intake pipe 15
→ The drain pipe 17 → the pipe 19 flow in this order. At the same time, the disinfecting liquid LM is directly supplied to the bypass pipe 20 from the disinfecting liquid storage tank 14B. Then, the disinfecting liquid LM directly supplied to the bypass pipe 20 circulates in a normal path of the bypass pipe 20 → the water supply pipe 16 → the bathtub 11 → the intake pipe 15.

Since other members are the same as those in the first embodiment, the same reference numerals are given and detailed descriptions thereof are omitted.
As described above, according to the present embodiment, the following operational effects are obtained.

(1) According to the present embodiment, the disinfecting liquid LM supplied from the disinfecting liquid storage tank 14 </ b> B is supplied to the water pipe 15 and the bypass pipe 20. Accordingly, since the bath water Wo containing the disinfectant LM having a relatively high concentration flows through the bypass pipe 20 and the water supply pipe 16, the disinfection treatment in the bypass pipe 20 and the water supply pipe 16 is performed as compared with the first embodiment. Can be performed reliably.

In addition, this invention can also be changed and embodied as follows.
-Although the bathtub 11 comprised the substantially rectangular shape in the said 1st Embodiment, this invention is not limited to this, The other shape may be comprised. For example, as shown in FIG. 10, this invention is applicable also to the bathtub 30 which comprised the shape where the depth of the bottom face 11a became deep gradually toward one direction side.
In each of the above embodiments, the disinfectant LM is a mixture of sodium hypochlorite and dilute hydrochloric acid at a predetermined concentration, but the present invention is not limited to this. For example, hydrogen peroxide may be used.
In each of the above embodiments, each of the first to sixth valves B1 to B6 is manually controlled for opening and closing, but the present invention is not limited to this, and all or one of them is controlled. The unit may be automatically opened and closed. Even in this case, the same effects as those of the above embodiments can be obtained.
In each of the above embodiments, in the bathtubs 11 and 25, the water intake Qa directly takes in the bath water Wo, but the present invention is not limited to this, and a hole is formed around the water intake Qa. A provided lid may be attached. For example, as shown in FIG. 11, a recess is formed around a water intake Qa provided on the bottom surface 11a, and a lid 40 having a substantially cylindrical shape so as to cover the water intake Qa in the recess is formed on the bottom surface 11a. It is fixed. The lid 40 is sealed at the upper part 41 and has a plurality of holes 42 on its side wall, so that the bath water Wo flows into the water intake port Qa through the holes 42 as shown by a one-dot chain line in FIG. It has become. At this time, since the upper portion 41 of the lid 40 is hermetically sealed, air is not mixed with the bath water Wo when the bath water Wo flows into the water intake port Qa. As a result, it is possible to reliably suppress air from being mixed in the intake pipe 15 and the water supply pipe 16.
In each of the above-described embodiments, the bath water Wo containing the disinfectant LM is performed for a period in which the drain pipe 17 → the pipe 19 → the bypass pipe 20 → the water supply pipe 16 → the bathtub 11 → the intake pipe 15 is circulated about 3 to 6 times. However, the present invention is not limited to this. In short, as long as the disinfection treatment in each intake pipe 15, drain pipe 17, pipe 19, bypass pipe 20, water supply pipe 16, and bathtub 11 is performed reliably, the number of times of recirculation may be any number. .
In each of the above embodiments, the present invention is applied to purify the bath water Wo stored in the bathtub 11 as a circulation purification device. However, the present invention is not limited to this, and water used for other purposes is a water tank. You may apply to the circulation purification apparatus which purify | stores what was stored in (2) and uses it for a long time. For example, you may apply to the circulation purification apparatus of a pool.
In each of the above embodiments, the present invention is applied to a filtration device using a sand-like filter material as the filter device 12, but the present invention is not limited to this, and is applied to a device equipped with another filter material. May be. For example, the other filter material may be applied to a material using a chelate adsorbent. Even in this case, the same effects as those of the above embodiments can be obtained.
-As for the circulating water purification apparatus 10 of each said embodiment, the installation place is not limited by the outdoors and indoors, For example, when a part or all of the circulating water purification apparatus 10 is installed outdoors, the You may make it take the countermeasure according to the outdoor temperature and the ultraviolet light irradiated. By doing in this way, the circulating water purification apparatus which manages management of appropriate purification of the bath water Wo is realizable.

The figure for demonstrating the structure of the circulating water purifier which concerns on 1st Embodiment. The figure for demonstrating the filtration driving | operation of a circulating water purification apparatus. The figure for demonstrating the backwash process of a filtration apparatus. The figure for demonstrating the washing | cleaning method of a circulating water purification apparatus. Similarly, the figure for demonstrating the washing | cleaning method of a circulating water purification apparatus. Similarly, the figure for demonstrating the washing | cleaning method of a circulating water purification apparatus. Similarly, the figure for demonstrating the washing | cleaning method of a circulating water purification apparatus. The figure for demonstrating the structure of the bathtub which concerns on 2nd Embodiment. The figure for demonstrating the structure of the bathtub which concerns on 3rd Embodiment. The figure for demonstrating another example. The figure for demonstrating another example.

Explanation of symbols

  Wo ... water for bath as water, W1 ... treated water, LM ... disinfectant as disinfectant, 10 ... circulating water purifier, 11,25 ... tub as water tank, 12 ... filtering device, 13 ... reserved as storage amount measuring means Quantity measuring part, 14 ... disinfectant supply part, 15 ... water intake pipe, 16 ... water supply pipe, 25a ... concave part as a storage means.

Claims (8)

A water intake pipe for taking water stored in the tank,
A filtration device for filtering the water taken through the intake pipe;
In the cleaning method of the circulating water purification apparatus comprising a water supply pipe for supplying treated water filtered by the filtration apparatus to the water tank,
A removing step of removing the suspended matter in the water accumulated in the filtration device by water stored in the water tank;
A disinfection step of disinfecting the water intake pipe, the water supply pipe and the filter device by passing a disinfectant through the water intake pipe, the water supply tube and the filter device after removing the suspension in the water; A cleaning method for a circulating water purification apparatus, comprising: In the washing | cleaning method of the circulating water purification apparatus of Claim 1,
The disinfection process includes
A first disinfection step of disinfecting the intake pipe and the water supply pipe;
A cleaning method for a circulating water purification apparatus, comprising: a second disinfection step of disinfecting the inside of the filtration device after disinfecting the inside of the intake pipe and the water supply pipe. In the washing | cleaning method of the circulating water purification apparatus of Claim 2,
The first disinfection step supplies the disinfectant when a minimum amount of water that fills the intake pipe and the water supply pipe is stored in the water tank, and the water tank, the intake pipe, and the water supply pipe are A cleaning method for a circulating water purification apparatus, characterized in that it is performed by circulating each of them. In the washing | cleaning method of the circulating water purification apparatus as described in any one of Claims 1-3,
The said disinfectant has the neutrality which neutralizes with the said water, The washing | cleaning method of the circulating water purifier characterized by the above-mentioned. In the washing | cleaning method of the circulating water purification apparatus of Claim 4,
The said disinfectant contains the mixture of sodium hypochlorite and dilute hydrochloric acid, The washing | cleaning method of the circulating water purification apparatus characterized by the above-mentioned. A water intake pipe for taking water stored in the tank,
A filtration device for filtering the water taken through the intake pipe;
A water supply pipe for supplying treated water filtered by the filtration device to the water tank;
In the circulating water purification equipment with
The disinfectant is stored while communicating with the intake pipe, and the stored disinfectant is supplied to the intake pipe after removing the suspended matter in the water accumulated in the filtration device by the water stored in the water tank. A circulating water purification apparatus comprising a disinfectant supply section that enables the above. In the circulating water purification apparatus according to claim 6,
The said water tank is provided with the storage amount measuring means which judges whether only the quantity of the water which fills the said intake pipe and the said water supply pipe is stored in the said water tank, The circulating water purifier characterized by the above-mentioned. In the circulating water purification apparatus according to claim 6,
The said water tank is provided with the storage means which stores only the quantity of water which fills the inside of the said intake pipe and the said water supply pipe, The circulating water purification apparatus characterized by the above-mentioned.