JP2003170014A - Method for disinfecting and washing filter, and system therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively disinfect and wash the inside of a filter that cleans warm water contained in a bathtub or a heated swimming pool and recirculated with a recirculation pump without contaminating the warm water or heating it to a high temperature. <P>SOLUTION: After the operation of a circulation pump 2 is stopped, valves V1 and V2 provided at the inlet and outlet of a filter 5 in a warm water recirculation path 3 are closed. A sterilizing chemical having a sterilizing action and a biofilm removing action is fed into the filter 5 to fill the filter 5 with the chemical, and the chemical is allowed to stay in the filter 5 for a definite time and is then discharged from the drain of the filter 5. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for disinfecting and cleaning the inside of a filtration device provided in a hot water circulation path of a hot water circulation type hot water bath facility for circulating hot water in a bathtub or a hot water pool.

[0002]

2. Description of the Related Art Hot water circulating hot water bath equipment filters hot water in a bathtub or hot water pool in order to reduce the amount of tap water or hot spring water used and to save fuel costs for hot water supply. It is circulated and reused. For example, as shown in FIG.
Hot water circulation path 3 for circulating the hot water inside by the circulation pump 2
Further, a hair collector 4 for collecting foreign matter such as hair mixed in warm water, a filtering device 5 for purifying the warm water, and a heating device 6 for heating the warm water to a set temperature are provided.

Further, in order to sterilize pathogenic bacteria such as coliform bacteria and Legionella spp., A disinfecting chemical injection device 7 for injecting a chlorine-based chemical into the hot water circulation path 3 is provided to constantly circulate hot water containing chlorine. I am trying.

It is said that it is desirable that the chlorine-based chemicals used for disinfecting bath water have a free residual chlorine concentration in the bath water of 0.2 to 0.4 mg / L for 2 hours or more per day.

However, with the passage of time, microorganisms such as amoeba that propagate in the hot water circulation route 3 using organic matter in the bath water as a nutrient source produce biofilms (sliding biofilms). As a result, pathogens such as Legionella spp. And Escherichia coli are kept protected from the disinfecting action of disinfectants, so even if you disinfect only the bath water without removing them, a sufficient disinfecting effect cannot be obtained. was there.

[0006] In particular, in the filtration device 5 in which organic substances in the bath water are likely to accumulate, biofilm-producing microorganisms are easily propagated, and Legionella spp. Which parasitize the microorganisms and live in the biofilm are at 20 ° C. It breeds at ~ 50 ° C and most at around 36 ° C, so it becomes a hotbed of Legionella spp.

Therefore, it is necessary to periodically remove the biofilm in the filtration device 5 to carry out disinfection and cleaning to prevent the growth of microorganisms including Legionella spp.
There are hydrogen peroxide disinfection, high concentration chlorine disinfection, warm disinfection, etc.

Hydrogen peroxide disinfection has a strong sterilizing power, and hydrogen peroxide that foams by reacting with organic substances (used at 2 to 3%)
Is a method of physically peeling and removing the biofilm, and high-concentration chlorine disinfection is a method of circulating bath water containing a high concentration of effective chlorine in the hot water circulation path 3 for sterilization. In addition, the heat sterilization is a method of circulating and sterilizing bath water heated to a high temperature of 60 ° C. or higher.

[0009]

However, the hydrogen peroxide used for disinfecting hydrogen peroxide is a poisonous substance and a deleterious substance specified by the Deleterious Substances Control Law, and its handling is dangerous and treatment chemicals It has been pointed out that since a large amount is required and the chemical oxygen demand (COD) of the cleaning waste liquid is high, cleaning by a specialist is necessary and the cost is high.

Further, the high-concentration chlorine disinfection is performed by the hot water circulation route
There is a possibility that corrosion may occur in the pipes forming the seal, the seal portion of the circulation pump 2, and the like. Considering this corrosion, the free residual chlorine concentration in the bath water is set to about 5 to 10 mg / L, and the bath water is circulated for several hours at that concentration, but after disinfection, the chlorine concentration in the bath water is suitable for bathing. A large amount of fresh water must be replenished to dilute to a different concentration. Further, if a high concentration of chlorine enters the filtration device 5 in which the biofilm is generated, the chlorine may destroy the cell membrane of the microorganism, elute the protein or polysaccharide, and cause turbidity in the bath water. Also in this case, since it is necessary to replenish a large amount of fresh water, there is a problem that the amount of tap water or hot spring water used increases and the fuel cost for hot water supply increases.

Next, in the heat disinfection, since the bath water heated to a high temperature of 60 ° C. or higher is circulated throughout the bath 1 and the hot water circulation path 3, the fuel cost increases and at the same time the heat disinfection is performed. After that, there is a problem that it takes a long time to lower the temperature of the bath water to a temperature suitable for bathing.
It has been pointed out that when a vinyl chloride pipe or the like is used for the pipe, the pipe may be softened and deteriorated by heat.

Further, in order to remove the biofilm and the like adhering to the filter medium, it is desirable for the filter unit 5 to circulate hot water in a direction opposite to the circulation direction to backwash the filter medium. In general, a filtering device made of a cartridge-type filter medium in which synthetic fiber yarn is wound in a cylindrical shape does not have a backwash function, so that there is a problem that the biofilm attached to the filter medium cannot be washed and removed.

Therefore, according to the present invention, the biofilm generated inside the filtration device is washed and removed without causing the above-mentioned problems, and the Legionella spp. Living in the biofilm is surely killed. The technical task is to be able to do so.

[0014]

In order to solve the above-mentioned problems, the invention of claim 1 disinfects a filtration device interposed in a hot water circulation path for circulating hot water in a bathtub or a hot water pool by a circulation pump. In the cleaning method, the operation of the circulation pump is stopped, the hot water circulation path is closed at the inlet side and the outlet side of the filtration device, and a bactericide solution having a bactericidal action and a biofilm removal action is supplied into the filtration device. Then, after the chemical solution is filled in the filtration device and stored for a certain period of time,
It is characterized in that it is discharged from the drain of the filtration device.

According to the present invention, the biofilm adhered and formed in the filtration device is removed by a small amount of the bactericide solution that fills the inside of the filtration device, and at the same time, the biofilm inhabits the biofilm. Pathogenic bacteria such as Legionella spp. Are sterilized.

Next, the invention of claim 3 is a disinfecting and cleaning system for a filtering device interposed in a hot water circulation path for circulating hot water in a bathtub or a hot water pool by a circulation pump, wherein: A valve for opening and closing the hot water circulation path on the outlet side, a disinfecting and cleaning pipe for supplying a germicide solution having a sterilizing action and a biofilm removing action in the filtering device, and stopping the operation of the circulation pump. The valve is closed, the warm water remaining inside is drained from the drain of the filtration device, the sterilizing chemical liquid is supplied from the disinfection and cleaning pipe into the filtration device, and the chemical liquid is filled in the filtration device. And a controller for discharging the water from the drain of the filtration device after the water is stored for a certain period of time.

According to the present invention, after the warm water remaining in the filtering device is discharged from the drain, a bactericidal chemical liquid having a bactericidal action and a biofilm removing action is supplied into the filtering device, and the chemical liquid is filtered. Since it is stored in the device for a certain period of time, the biofilm removal effect and sterilization effect by the chemical solution are very good.

Further, since the germicide solution supplied into the filtration device is discharged from the drain of the filtration device, there is little risk that the used germicide solution bath water used for disinfection and cleaning is contaminated.

Next, the invention of claim 10 is a two-tank separation in which a hot water circulation path for circulating hot water in a bathtub or a hot water pool is separated into two tanks, a front tank and a rear tank. In a disinfecting and cleaning system of a type filtration device, a valve that opens and closes the hot water circulation path on the inlet side of the pre-stage tank and the outlet side of the post-stage tank, and a sterilizing action and a biofilm removing action inside the pre-stage tub and the post-stage tub And a pipe for disinfecting and cleaning for supplying a germicide solution, and stopping the operation of the circulation pump at a preset time to close the valve, and the inside of each of the drains of the pre-stage tank and the post-stage tank. The remaining warm water is discharged, and the sterilizing chemical solution is supplied from the disinfecting and cleaning pipe to the insides of the pre-stage tank and the post-stage tank, and the chemical solution is filled in the pre-stage tank and the post-stage tank for a certain time. Set aside , Characterized by comprising a controller to discharge from their drain of each vessel.

According to the present invention, the sterilizing solution is filled in the front tank and the rear tank of the two-tank separation type filtration device and stored for a certain period of time, so that the adhering and forming of the inside of the front tank and the rear tank can be achieved. It is possible to remove the formed biofilm and surely kill the Legionella spp. That inhabit the biofilm.

Further, according to the present invention, the hot water circulation path is closed at the inlet side of the front tank and the outlet side of the rear tank, and the hot water remaining inside the front tank and the rear tank is drained from each tank. Since the sterilizing chemical solution is supplied only to the inside of the former tank and the latter tank in the state of being discharged from the tank, there is an advantage that the disinfecting and cleaning effect by the chemical solution is good and the usage amount thereof is very small.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 5 are views showing an embodiment of a disinfecting and cleaning system according to the invention of claim 3, and FIG.
12 to 14 are views showing an embodiment of the disinfecting and cleaning system according to the invention of claim 10, respectively. The parts corresponding to those of the conventional example in FIG. 13 are designated by the same reference numerals, and detailed description thereof will be omitted.

In all of the disinfecting and cleaning systems of the filtering device shown in FIGS. 1 to 5, valves V1 and V2 for opening and closing the hot water circulation path 3 on the inlet side and the outlet side of the filtering device 5 and the sterilizing action of Legionella spp. And a sterilizing and cleaning pipe 8 for supplying a bactericidal liquid containing phenoalkyl chloride as a main component into the filtration device 5 and having a function of removing biofilm and slime, and circulating at a time preset by a timer. The operation of the pump 2 is stopped, the valves V1 and V2 are closed, the hot water remaining inside is drained from the drain 9 of the filtration device 5, and the disinfectant cleaning liquid is supplied into the filtration device 5 from the pipe 8. Then, the controller 10 is provided with which the chemical solution is filled in the filter device 5, stored for a certain period of time, and then discharged from the drain 9 of the filter device 5.

In the system shown in FIG. 1, the disinfecting and cleaning pipe 8 is connected to the outlet 11 of the filtering device 5 by the output signal of the controller 10 which controls the drive of the valve and the pump, and the water supply interposed in the pipe 8 is connected. The germicide solution stored in the tank 13 by the pump 12 is supplied to the inside from the outlet 11 of the filtering device 5, and a part of the germicide solution supplied into the filtering device 5 is connected to the inlet 14 of the filtering device 5. Drainage pipe 1
The inside of the filtration device 5 is backwashed by being discharged from the device 5.

That is, the controller 10 stops the operation of the circulation pump 2 at the time set by the timer, closes the valves V1 and V2 of the hot water circulation path 3, and opens and closes the drain pipe 15, and the filter 16. A control signal for opening the drain valve 17 for opening and closing the drain 9 of the device 5 is output, and the hot water remaining in the filtering device 5 is discharged from the drain 9 of the filtering device 5.

Next, the drain valve 17 of the filtering device 5 is closed, the valve 18 connecting the disinfection / cleaning pipe 8 to the outlet 11 of the filtering device 5 is opened, and the tank 1 is fed by the water pump 12.
The germicide solution in 3 is supplied to the inside from the outlet 11 of the filtering device 5 to backwash the inside of the filtering device 5 for a certain time.

When the backwash is completed, the water pump 12
Is stopped, the valve 18 of the disinfecting and cleaning pipe 8 and the valve 16 of the drain pipe 15 are closed, and the germicide solution supplied to the inside of the filtering device 5 is filled therein and stored for a certain period of time.

Although the storage time depends on the concentration of the phenoalkyl chloride which is the main component of the germicide solution, for example, if the concentration of the phenoalkyl chloride in the germicide solution is 200 to 330 mg / l, the germicide solution is For about 1 hour or more,
It is possible to remove the biofilm that has adhered to the inside of the filtration device 5 by peeling it off, and since it has a bactericidal effect that kills Legionella spp. In a few minutes to a few dozen minutes, if it is stored for 1 hour It is possible to reliably kill Legionella spp. That live in the film. Further, phenoalkyl chloride composed of a composition such as alkylbenzylammonium chloride, 2-phenoxyethanol, isopropyl alcohol, etc. has excellent properties that it is harmless to the human body and does not corrode pipes or the seal part of a pump. ing.

When the storage time has passed,
The drain valve 17 of the filtration device 5 and the valve V1 that has blocked the hot water circulation path 3 on the inlet side of the filtration device 5 are opened, the circulation pump 2 is operated, and the used germicide solution in the filtration device 5 is removed. After draining from the drain 9 and washing the inside of the filtering device 5 with the bath water supplied from the inlet 14 of the filtering device 5 to the inside by the circulation pump 2, the drain valve 17 of the filtering device 5 is closed and at the same time, the filtration is performed. Device 5
The valve V2 that has closed the hot water circulation path 3 on the outlet side of is opened, and the normal operation of circulating the bath water through the hot water circulation path 3 by the circulation pump 2 is restarted.

When the bath water is supplied to the inside of the filtration device 5 by the circulation pump 2 to clean the inside thereof, the rotation speed of the circulation pump 2 is increased more than in the normal operation in order to enhance the cleaning effect. To do so. Further, if the bactericidal liquid is heated to 60 ° C. or higher and supplied into the filtration device 5, the biofilm removing action of the liquid is enhanced, and at the same time, the bactericidal action by the chemical liquid component and the bactericidal action by high temperature are synergistic. Functioning effectively, a better disinfecting and cleaning effect can be obtained.

Next, the system of FIG. 2 corresponds to the drain pipe 1 of FIG.
5, a drain pipe 20 having the same function as that of the drain pipe 20 is provided in the air vent 19 of the filtration device 5, and a valve 21 provided in the drain pipe 20 is provided in the drain pipe 15 of FIG. The valve 16 is opened and closed at the same timing as the valve 16 to disinfect and wash the inside of the filtration device 5 in the same procedure as that of the shimtem shown in FIG.

Next, in the system shown in FIG. 3, one end of the disinfecting and cleaning pipe 8 is connected to the outlet 11 of the filtration device 5, and the other end is connected to the discharge port 22 of the circulation pump 2 and to the pipe 8. An injection pipe 23 for injecting a high-concentration bactericidal liquid is connected to the inside of the pipe, and the bactericidal liquid injected into the pipe of the disinfecting and cleaning pipe 8 from the injection pipe 23 is circulated from the outlet 11 of the filtering device 5 by the circulation pump 2. It is designed to be supplied internally.

That is, the system shown in FIG.
An injection pipe for injecting a high-concentration bactericidal liquid into the disinfecting and cleaning pipe 8 that directly connects the discharge port 22 of the device and the outlet 11 of the filtering device 5 with a valve 24 that opens and closes the pipe line. 23 is connected.

Then, the controller 10 temporarily stops the operation of the circulation pump 2 at a preset time, closes the valves V1 and V2 of the hot water circulation path 3, and opens the drain valve 17 of the filtration device 5. After draining the hot water remaining in the drain 9 from the drain 9, the drain valve 17 is closed, and the valve 16 of the drain pipe 15 connected to the inlet 14 of the filtration device 5 and the valve 26 provided in the injection pipe 23 are provided. Is opened to inject a high-concentration germicide solution into the pipe of the disinfection / cleaning pipe 8 from the injection pipe 23, the valve 24 of the disinfection / cleaning pipe 8 is opened, and the circulation pump 2 is operated to disinfect the pump. The high-concentration bactericidal liquid injected from the injection pipe 23 is diluted with bath water fed into the pipe of the cleaning pipe 8 and supplied to the inside from the outlet 11 of the filtering device 5, and the bactericidal liquid inside the filtering device 5 is used. After backwashing for a certain period of time, the operation of the circulation pump 2 is stopped, the valve 24 of the disinfection / cleaning pipe 8 is closed, and the germicide solution supplied into the filtering device 5 is filled therein and stored for a certain period of time. .

After the storage time has elapsed, the drain valve 17 of the filtration device 5 is opened to discharge the used germicide solution in the filtration device 5 from the drain 9, and at the inlet side of the filtration device 5, the hot water circulation path 3 Valve V1 that was shut off
Is opened, the circulation pump 2 is restarted, and bath water is supplied from the inlet 14 of the filtration device 5 to the inside thereof by the circulation pump 2 to wash the inside of the filtration device 5, and then the drain valve 17 is closed. Then, the valve V2 of the hot water circulation path 3 is opened, and the normal operation of circulating the bath water through the hot water circulation path 3 is restarted.

Next, the system of FIG. 4 corresponds to the drain pipe 1 of FIG.
5 shows a modified example in which a drainage pipe 20 having the same function as the drainage pipe 5 is provided in the air vent 19 of the filtration device 5.

Next, in the system shown in FIG. 5, the disinfection / cleaning pipe 8 is provided in parallel with the hot water circulation path 3 and the inlet 14 of the filtration device 5 is connected.
And a pipe 8 which forms a bypass path directly connecting the outlet 11
An injection pipe 23 for injecting a bactericidal drug solution is connected to the pipe, and a water feed pump 12 for circulating the bactericidal drug solution injected from the injection pipe 23 into the filtration device 5 is interposed.

That is, in the system shown in FIG. 5, the disinfecting and cleaning pipe 8 that directly connects the inlet 14 and the outlet 11 of the filtering device 5 is provided.
A valve 24 for opening and closing the pipe and a water pump 12 are provided, and an injection pipe 2 for injecting a germicide solution into the pipe.
3 is connected.

Further, the filtering device 5 is composed of an upper tank portion 5a which is a filter layer using a cartridge type filter material in which synthetic fiber yarn is wound in a cylindrical shape, and an activated stone layer which is filled with porous stone pieces. It has a structure in which the lower tank portion 5b is integrated.

Then, the controller 10 stops the operation of the circulation pump 2 at the time set by the timer, closes the valves V1 and V2, and causes the drain valve 28 provided on the upper tank portion 5a side of the filtration device 5 to operate. After opening the drain valve 17 provided on the lower tank portion 5b side and discharging hot water remaining in the upper tank portion 5a and the lower tank portion 5b from the drain 9,
The drain valves 17 and 28 are closed, the valve 24 of the disinfection / cleaning pipe 8 and the valve 26 of the injection pipe 23 are opened, and the water supply pump 12 interposed in the disinfection / cleaning pipe 8 is operated for a certain period of time.

As a result, the disinfectant solution is injected from the injection pipe 23 into the disinfecting and cleaning pipe 8, and the disinfectant solution is circulated and supplied into the filter device 5 by the water pump 12.
The inside of the filtration device 5 is disinfected and washed. The water supply direction of the water supply pump 12 is either the backwash direction in which the germicide solution in the pipe 8 is supplied from the outlet 11 of the filtering device 5 into the inside thereof, or the forward washing direction in which it is supplied from the inlet 14 of the filtering device 5 to the inside thereof. May be Also, the water pump 1
If 2 is operated intermittently, the effect of disinfecting and cleaning the inside of the filtering device 5 with the germicide can be enhanced.

As described above, after the germicide solution is circulated and supplied into the filtration device 5 and stored therein for a certain period of time, the operation of the water supply pump 12 is stopped, the valve 24 of the pipe 8 is closed, and the hot water circulation path is provided. The valve V1 of No. 3 and the drain valves 17 and 28 of the filtration device 5 are opened to discharge the used germicide solution remaining in the filtration device 5 from the drain 9, and the circulation pump 2 is operated to operate the filtration device. Bath water is supplied from the inlet 14 of the tank 5 to the inside for a certain period of time, and the inside of the filtering device 5 is washed with the bath water.

Next, the drain valves 17 and 28 are closed, and at the same time, the valve V2 of the hot water circulation path 3 is opened to restart the normal operation in which the bath water is circulated through the hot water circulation path 3 by the circulation pump 2.

In the system of FIG. 5, when the germicide solution is intermittently circulated by the water feed pump 12 as described above during the time period in which the germicide solution is stored in the filtration device 5, the circulation flow causes the filtration. There is an advantage that the biofilm attached and generated in the device 5 is easily peeled off, the biofilm removal action of the bactericide solution is promoted, and the disinfecting and cleaning effect is enhanced.

Next, in the disinfection / cleaning system of the filtration device shown in FIGS. 6 to 12, the inlet side and the back stage tank of the pre-stage tank 30a of the two-tank separation type filtration device 30 interposed in the hot water circulation path 3 are all shown. Valves V1 and V2 for opening and closing the hot water circulation path 3 on the outlet side of 30b, a disinfecting and cleaning pipe 31 for supplying a germicide solution to the insides of the pre-stage tank 30a and the post-stage tank 30b, and a circulation pump at a preset time. 2 is stopped and the valves V1 and V2 are closed, and the drain 32 of the pre-stage tank 30a is closed.
And the drain 33 of the rear tank 30b to drain hot water respectively remaining in the tank, and the disinfecting / cleaning pipe 31 supplies a sterilizing chemical solution to the insides of the front tank 30a and the rear tank 30b. A controller 50 is provided for filling the insides of the tanks 30a and 30b, storing them for a certain period of time, and then discharging them from the drains 32 and 33 of the respective tanks.

The first-stage tank 30a is a filter tank using a cartridge type filter medium in which synthetic fiber yarn is wound in a cylindrical shape, and the second-stage tank 30b is an activated stone tank filled with porous stone pieces.

In the system of FIG. 6, the disinfection / cleaning pipe 31 uses the water pump 35 to feed the germicide solution stored in the tank 34 to the outlet 36 of the pre-stage tank 30a and the post-stage tank 30.
It is configured such that the gas is supplied from the outlet 37 of FIG.

That is, in the system of FIG. 6, the controller 50 stops the operation of the circulation pump 2 at the time set by the timer to close the valves V1 and V2 of the hot water circulation path 3 and, at the same time, the outlet of the pre-stage tank 30a. 36 and the latter tank 3
The valve 40 that opens and closes the conduit of the connecting pipe 39 that connects the inlet 38 of 0b is closed.

Next, the drain valve 41 of the former tank 30a
Then, the drain valve 42 of the rear tank 30b is opened, and the valve 45 connecting the drain pipe 44 to the inlet 43 of the front tank 30a and the valve 47 connecting the drain pipe 46 to the inlet 38 of the rear tank 30b are opened. , The warm water remaining inside the pre-stage tank 30a and the post-stage tank 30b is respectively drained 32, 3
After discharging from 3, drain valves 41 and 42 are closed.

Next, the disinfection / cleaning pipe 31 is connected to the front tank 30a.
The valves 48 and 49 connected to the outlet 36 of the tank and the outlet 37 of the rear tank 30b are opened to operate the water supply pump 35 interposed in the disinfecting and cleaning pipe 31, and the pump 35 is used to disinfect the germicide solution in the tank 34. The outlet 36 of the front tank 30a and the rear tank 3
It is supplied to the inside of each tank from the outlet 37 of 0b, and the inside is backwashed with a germicide solution for a certain period of time.

Next, the operation of the water supply pump 35 is stopped, the valves 48 and 49 of the disinfection / cleaning pipe 31 are closed, and the sterilizing solution filled in the insides of the pre-stage tank 30a and the post-stage tank 30b is kept therein for a predetermined time. Put a reservoir. As a result, the insides of the pre-stage tank 30a and the post-stage tank 30b can be effectively disinfected and cleaned with a relatively small amount of germicide solution.

After a certain storage time has elapsed, the drain valve 41 of the pre-stage tank 30a is opened to discharge the used germicide solution in the pre-stage tank 30a from the drain 32, and at the same time, the valve V1 of the hot water circulation path 3 is opened. Open the
The circulation pump 2 is operated, and the bath water is supplied into the pre-stage tank 30a by the pump 2 to wash the inside thereof.

Next, the drain valve 41 of the front tank 30a
At the same time, the valve 40 of the connecting pipe 39 that connects the pre-stage tank 30a and the post-stage tank 30b and the drain valve 42 of the post-stage tank 30b are opened to remove the used sterilizing chemical solution in the post-stage tank 30b from the drain 33. The bath water supplied from the circulation pump 2 while being discharged is connected to the inside of the pre-stage tank 30a and the connecting pipe 39.
After being supplied to the inside from the inlet 38 of the post-stage tank 30b through the inside to wash the inside of the post-stage tank 30b, the valve V2 of the hot water circulation path 3 is opened, and the drain valve 42 of the post-stage tank 30b is opened.
Is closed and the normal operation of circulating the bath water through the hot water circulation path 3 is restarted.

Next, the system of FIG. 7 corresponds to the drain pipe 4 of FIG.
Instead of 4 and 46, a drainage pipe 5 having a similar function to this
1 and 52 are provided in the air bleeder 53 of the front tank 30a and the air bleeder 54 of the rear tank 30b, respectively. Valves 55 and 56 are provided in the drain pipes 51 and 52, respectively.
By opening and closing at the same timing as the valves 45 and 47 inserted in 4 and 46, respectively, the disinfection and cleaning can be performed in the same procedure as the shimtem in FIG.

Next, in the system of FIG. 8, one end of the disinfection / cleaning pipe 31 is connected to the discharge port 22 of the circulation pump 2,
The other end side is branched into two and connected to the outlet 36 of the front tank 30a and the outlet 37 of the rear tank 30b, and the pipe 3
1, an injection pipe 5 for injecting a high-concentration germicide solution into the pipe
7 is connected, and the disinfection and cleaning pipe 31 is connected from the injection pipe 57.
The high-concentration bactericidal solution injected into the pipe of the above is diluted with the bath water fed from the warm water circulation path 3 by the circulation pump 2 and is discharged from the outlets 36 and 37 of the pre-stage tank 30a and the post-stage tank 30b into the respective tanks. It is configured to supply. Note that the other piping configurations are common to the system of FIG.

That is, the system shown in FIG.
The valve 58 for opening and closing the pipe line is provided in the disinfecting and cleaning pipe 31 that connects the discharge port 22 of No. 1 and the outlets 36 and 37 of the pre-stage tank 30a and the post-stage tank 30b, and a high concentration is provided in the pipe. An injection pipe 57 for injecting the bactericidal drug solution is connected.

Then, the controller 50 temporarily stops the operation of the circulation pump 2 at a preset time to close the valves V1 and V2 of the hot water circulation path 3 and, at the same time, the outlet 36 of the pre-stage tank 30a and the post-stage tank 30a. 30b entrance 38
The valve 40 of the connecting pipe 39 that connects the
The drain valve 41 of the front tank 30a and the drain valve 42 of the rear tank 30b are opened, and a valve 45 for connecting a drainage pipe 44 to the inlet 43 of the front tank 30a and the rear tank 3
After opening the valve 47 connecting the drain pipe 46 to the inlet 38 of 0b, the hot water remaining inside the pre-stage tank 30a and the post-stage tank 30b is discharged from the drains 32 and 33, respectively,
The drain valves 41 and 42 are closed.

Next, the valve 60 of the injection pipe 57 is opened, a high-concentration germicide solution is injected from the injection pipe 57 into the pipe of the disinfecting and cleaning pipe 31, and the valve 58 of the pipe 31 is opened. The circulation pump 2 is operated, and the bactericidal solution injected into the pipe 31 is diluted with the bath water fed from the hot water circulation path 3 into the pipe 31 by the pump 2 to dilute the outlet 36 of the pre-stage tank 30a and the post-stage tank 30b. Is supplied from the outlet 37 of each of the tanks to the inside of the tanks, and the insides of the tanks are backwashed with a sterilizing solution for a certain period of time.
Closed the valve 58 of the first tank 30a and the second tank 30b
Store the germicide solution inside for a certain period of time.

When the storage time has passed,
After the drain valves 41 and 42 are opened to discharge the germicide solution in the front tank 30a and the rear tank 30b from the drains 32 and 33, the valve V1 of the hot water circulation path 3 is opened and the circulation pump 2 is restarted. Then, the bath water is supplied from the inlet 43 of the pre-stage tank 30a by the pump 2 and, at the same time, the bath water is discharged from the drain 32 of the pre-stage tank 30a to clean the inside of the bath.

When the cleaning of the pre-stage tank 30a is completed, the valve 40 of the connecting pipe 39 is opened, the drain valve 41 of the pre-stage tank 30a is closed, and the bath water sent by the circulation pump 2 is discharged from the pre-stage tank 30a. Rear tank 30 through connecting pipe 39
At the same time as the water is supplied into the b, the bath water is drained from the drain 33 of the latter tank 30b, thereby cleaning the inside of the latter tank 30b.

Then, the valve V2 of the hot water circulation path 3 is opened, the drain valve 42 of the rear tank 30b is closed, and the normal operation of circulating the bath water by the circulation pump 2 through the hot water circulation path 3 is restarted.

Next, the system of FIG. 9 corresponds to the drain pipe 4 of FIG.
Instead of 4 and 46, a drainage pipe 5 having a similar function to this
1 and 52 are provided in the air bleeder 53 of the front tank 30a and the air bleeder 54 of the rear tank 30b, respectively. Valves 55 and 56 are provided in the drain pipes 51 and 52, respectively.
By opening and closing at the same timing as the valves 45 and 47 interposed in 4 and 46, respectively, the disinfection and cleaning in the pre-stage tank 30a and the post-stage tank 30b can be performed in the same procedure as the shimtem in FIG.

Next, in the system shown in FIG. 10, one end of the disinfection / cleaning pipe 31 is connected to the inlet 43 of the pre-stage tank 30a.
The other end is connected to the outlet 37 of the post-stage tank 30b, and the pipe 31 is connected to an injection pipe 57 for injecting a bactericidal drug solution into the pipe 31, and the bactericidal liquid injected from the injection pipe 57 is supplied to the pre-stage tank. A water supply pump 35 that supplies the water from the inlet 43 of the inlet 30a to the inside thereof and a valve 58 that opens and closes the pipeline of the pipe 31 are provided. The drain 32 of the pre-stage tank 30a is provided with a drain valve 62 for draining water from the bottom of the tank and a drain valve 62 for draining water from the middle layer of the tank.

Then, the controller 50 stops the operation of the circulation pump 2 at the time set by the timer, closes the valves V1 and V2 of the hot water circulation path 3, and
The drain valves 41 and 62 of the front tank 30a and the rear tank 30
The drain valve 42 of b is opened and each tank 30a, 30b is opened.
The warm water remaining inside is drained from each drain 32 and 33.

Next, the drain valves 41, 62 and 42 are closed, and the valve 58 of the disinfection / cleaning pipe 31 is opened.
The bactericidal liquid is injected from the injection pipe 57 into the disinfecting / cleaning pipe 31, and the water feed pump 35 provided in the pipe 31 is operated so that the bactericidal liquid injected into the pipe 31 is supplied to the pre-stage tank 3
It is supplied to the inside from the inlet 43 of 0a,
0a from the outlet 36 through the connecting pipe 39 to the inside of the rear tank 30b, and from the outlet 37 of the rear tank 30b to the pipe 3 again.
While circulating in the path for supplying the pre-stage tank 30a through 1 inside, the pre-stage tank 30a and the post-stage tank 30b are filled with the germicide solution and stored for a certain period of time. If the water supply pump 35 is intermittently operated during this period, the disinfecting and cleaning effect in the pre-stage tank 30a and the post-stage tank 30b by the germicide or the high temperature water is enhanced.

Next, the operation of the water supply pump 35 is stopped, the valve 58 of the pipe 31 is closed, the valve V1 of the hot water circulation path 3 and the drain valve 4 of the pre-stage tank 30a are closed.
1, 62 and the drain valve 42 of the rear tank 30b are opened and the circulation pump 2 is operated, whereby the front tank 30
After the used bactericidal liquid remaining in the a and the rear tank 30b is discharged from each tank, at the same time, the front tank 30a and the rear tank 30b are washed with bath water supplied by the circulation pump 2 for a certain time. , Valve V2 of hot water circulation path 3
The drain valves 41 and 62 of the pre-stage tank 30a,
The drain valve 42 of the rear tank 30b is closed to restart the normal operation of circulating the bath water in the hot water circulation path 3.

Next, the system of FIG. 11 is a modification of the system of FIG. 10, in which one end of the disinfection / cleaning pipe 31 is connected to the inlet 43 of the pre-stage tank 30a, and the pipe 31 is branched from the middle thereof. Then, a branch pipe 63 connected to the inlet 38 of the rear tank 30b is provided, and the operation of the circulation pump 2 is stopped at the time set by the timer, and the hot water circulation path 3
The valves V1 and V2 are closed, and the valve 58 of the disinfection / cleaning pipe 31 and the valve 40 of the connecting pipe 39 that connects the pre-stage tank 30a and the post-stage tank 30b are opened, so that the inside of the disinfection / cleaning pipe 31 extends from the injection pipe 57. Inject the germicide solution into the pipe and pipe 3
1 operates the water feed pump 35, and the front tank 3
The sterilizing solution is simultaneously supplied from the inlet 43 of 0a and the inlet 38 of the rear tank 30b to the inside of each tank.

After the germicide solution is stored in the front tank 30a and the rear tank 30b for a certain period of time, the disinfection / cleaning pipe 3
The valve 58 of 1 and the valve 40 of the connecting pipe 39 are closed,
The drain valves 41 and 62 of the pre-stage tank 30a are opened to discharge the used sterilizing solution from the inside of the tank, and the valve V1 of the hot water circulation path 3 is opened to operate the circulation pump 2. Bath water is supplied from the inlet 43 of the pre-stage tank 30a to the inside for a certain period of time, and
The inside of 0a is washed.

Next, the drain valve 4 of the front tank 30a
1, 62 are closed, the valve 40 of the connecting pipe 39 and the drain valve 42 of the rear tank 30b are opened to discharge the used germicide solution from the rear tank 30b, and the circulation pump 2 is used to cool the front tank 30a. Bathtub water supplied to the connection pipe 39
Through the inlet 38 of the rear tank 30b for a certain period of time to wash the inside of the rear tank 30b, and then the drain valve 42 of the rear tank 30b is closed to supply the hot water circulation path 3
The valve V2 is opened to restart the normal operation of circulating the bath water in the hot water circulation path 3.

Next, the system shown in FIG. 12 is a modification of the system shown in FIG. 11, in which the other end of the disinfection / cleaning pipe 31 is connected to the branch pipe 63 which connects to the inlet 38 of the rear tank 30b. A valve 64 for opening and closing is provided, and the pre-stage tank 3
A bypass pipe 65 that directly connects the outlet 36 of the tank 0a and the outlet 37 of the rear tank 30b is provided.
The water feed pump 35 installed in the
7 is different from the system of FIG. 11 in that a bactericidal liquid is supplied from the inside.

In the system of FIG. 12, the operation of the circulation pump 2 is stopped at the time set by the timer, the valves V1 and V2 of the hot water circulation path 3 and the valve 40 of the connecting pipe 39 are closed, and the branch pipe is connected. The valve 64 of 63 is opened to inject the germicide solution into the disinfection / cleaning pipe 31 from the injection pipe 57, and the water supply pump 35 provided in the pipe 31 is operated to be operated from the outlet 43 of the rear tank 30b. After supplying the germicide solution to the inside, circulating the germicide solution passing through the inside of the rear tank 30b to the outlet 37 of the latter tank 30b through the branch pipe 63 for a certain time, and then backwashing the inside of the latter tank 30b. , The operation of the water pump 35 is stopped, and the rear tank 3
Store germicide solution in 0b for a certain period of time.

Next, the valve 64 of the branch pipe 63 is closed, and the valve 58 of the pipe 31 and the valve 40 of the connecting pipe 39 are closed.
Then, the valve 66 of the bypass pipe 65 is opened, the water pump 35 is restarted, and the germicide solution injected from the injection pipe 57 into the pipe 31 is passed through the bypass pipe 65 to the pre-stage tank 30a.
It is supplied to the inside from the outlet 36 of the
The germicide solution passing through the inside a is circulated for a certain period of time through the pipe 31 and the bypass pipe 65 so as to flow back to the outlet of the pre-stage tank 30a, and the inside of the pre-stage tank 30a is backwashed, and then the operation of the water supply pump 35 is stopped. Then, the germicide solution is stored in the pre-stage tank 30a for a certain period of time.

The valve 58 of the disinfection / cleaning pipe 31
And the valve 66 of the bypass pipe 65 is closed,
The drain valves 41 and 62 of 0a are opened, and the front tank 3
The used germicide solution in 0a is discharged from the drain 32, and at the same time, the circulation pump 2 is operated to wash the inside of the pre-stage tank 30a by the bath water supplied by the pump 2.

Next, the drain valves 41 and 62 of the former tank 30a are closed, the valve 40 of the connecting pipe 39 and the latter tank 3 are closed.
The drain valve 42 of 0b is opened to discharge the used germicide solution in the rear tank 30b from the drain 33, and at the same time, the circulation tank 2 supplies the water in the front tank 30a and the connecting pipe 39 to the rear tank 30b. After cleaning the inside, the drain valve 42 of the latter tank 30b is closed, the valve V2 of the hot water circulation path 3 is opened, and the normal operation of circulating the bath water in the hot water circulation path 3 is restarted.

[0075]

According to the present invention, hot water in a bathtub or a hot water pool circulated by a circulation pump is not contaminated or is attached to the inside of a filter device for purifying the hot water without heating it to a high temperature. It has a very excellent effect that it can surely kill Legionella spp. That inhabit in the biofilm.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 3.

FIG. 2 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 3;

FIG. 3 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 3;

FIG. 4 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 3;

FIG. 5 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 3;

FIG. 6 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 7 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 8 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 9 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 10 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 11 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 12 is a diagram showing an example of a disinfecting and cleaning system according to the invention of claim 10;

FIG. 13 is a diagram showing a conventional technique.

[Explanation of symbols]

2 ……………… Circulation pump 3 ……………… Hot water circulation route V1 ……………… Valve V2 ……………… Valve 5 ……………… Filtration device 8 ……………… Piping for disinfection and cleaning 9 ……………… Drain of filtration device 10 ……………… Controller 11 ……………… Filtration device exit 12 ……………… Water pump 14 ……………… Inlet of the filtration device 30 ……………… Filtration device 30a ……………… Front tank 30b ……………… Second stage tank 31 ……………… Piping for disinfection and cleaning 32 ……………… Drain of the previous tank 33 ……………… Drain in the latter stage tank 35 ……………… Water pump 36 ……………… Exit of the previous tank 37 ……………… Exit of rear tank 38 ……………… Inlet of the rear tank 39 ……………… Connection pipe 43 ……………… Inlet of the front tank 44 ……………… Drainage pipe 46 ……………… Drainage pipe 50 ……………… Controller

Claims (11)

[Claims] 1. A method for disinfecting and cleaning a filtration device interposed in a hot water circulation path for circulating hot water in a bathtub or a hot water pool by a circulation pump, wherein the circulation pump (2) is stopped to operate. The hot water circulation path (3) is closed on the inlet side and the outlet side of (5), and a bactericidal chemical solution having a bactericidal action and a biofilm removing action is supplied into the filtration device (5), and the chemical solution is filtered. A method for disinfecting and cleaning a filtering device, which comprises filling the device (5) and storing it for a certain period of time, and then discharging it from the drain of the filtering device (5). 2. The disinfecting and cleaning method according to claim 1, wherein the germicide solution is a chemical solution containing phenoalkyl chloride as a main component. 3. A disinfecting and cleaning system for a filtering device interposed in a hot water circulation path for circulating hot water in a bathtub or a hot water pool with a circulation pump, wherein the hot water is provided on the inlet side and the outlet side of the filtering device (5). Valves (V1, V2) for opening and closing the circulation path (3), and a disinfecting and cleaning pipe (8) for supplying a germicide solution having a sterilizing action and a biofilm removing action into the filtering device (5), The circulation pump (2)
Of the disinfecting and cleaning pipes (8) by discharging the hot water remaining therein from the drain (9) of the filtration device (5) by stopping the operation of the valve (V1, V2).
The controller for supplying the sterilizing chemical solution into the filtering device (5) from above, filling the chemical solution in the filtering device (5) and storing it for a certain period of time, and then discharging it from the drain of the filtering device (5) ( 10) A disinfecting and cleaning system for a filtering device, comprising: 4. The bactericidal chemical solution is a chemical solution containing a phenoalkyl chloride / cationic dye as a main component.
Disinfection and cleaning system as described. 5. The disinfecting and cleaning system according to claim 3 or 4, wherein the germicide solution is supplied from the outlet (11) of the filtering device (5) into the inside thereof. 6. The controller (10) is provided with an inlet (14) of the filtering device (5) or an air bleeder when the germicide solution is supplied from the outlet (11) of the filtering device (5) to the inside thereof. The disinfecting and cleaning system according to claim 3, 4 or 5, wherein (19) is connected to a drain pipe. 7. The disinfection / cleaning pipe (8) has one end connected to the outlet (11) of the filtration device (5) and the other end connected to the outlet (22) of the circulation pump (2). At the same time, the pipe (8) is connected to an injection pipe (23) for injecting the germicide solution into the pipe (8). 8. The disinfecting and cleaning pipe (8) is provided in parallel with the hot water circulation path (3), and the inlet (1) of the filtering device (5) is provided.
4) and an outlet (11) are directly connected to each other, and a pipe (8) is connected to an injection pipe (23) for injecting the germicide solution into the pipe (8) and from the injection pipe (23). 4. A water supply pump (12) for supplying the injected germicide solution into the filtering device (5).
The disinfecting and cleaning system according to 4, 5, 6 or 7. 9. The sterilizing solution is heated to 60 ° C. or higher and supplied into the filtering device (5).
Or the disinfecting and cleaning system according to item 8. 10. A disinfecting and cleaning system for a two-tank separation type filtration device, wherein a hot water circulation path for circulating hot water in a bathtub or a hot water pool by a circulating pump is provided separately in two tanks, a front tank and a rear tank. A valve (V1, V2) for opening and closing the hot water circulation path (3) on the inlet side of the pre-stage tank (30a) and the exit side of the post-stage tank (30b), and the pre-stage tank (30
a) and a pipe for disinfecting and washing (31) for supplying a germicide solution having a sterilizing action and a biofilm removing action into the latter-stage tank (30b), and stopping the operation of the circulation pump (2). The valves (V1, V2) are closed, and the hot water remaining in the drains (32, 33) of the pre-stage tank (30a) and the post-stage tank (30b) is discharged to the disinfection / cleaning pipe ( 31) supplying the sterilizing chemical solution to the inside of the pre-stage tank (30a) and the post-stage tank (30b), and filling the inside of the pre-stage tank (30a) and the post-stage tank (30b) with the chemical solution for a predetermined time. A disinfecting and cleaning system for a filtering device, comprising a controller (50) for discharging the drains of the respective tanks after they are stored. 11. A filter tank in which the pre-stage tank (30a) uses a cartridge type filter medium in which synthetic fiber yarn is wound in a cylindrical shape,
The disinfecting and cleaning system according to claim 10, wherein the latter-stage tank (30b) is an activated stone tank filled with porous stone pieces.