JP2949674B2 - Pool water purification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pool water purifying apparatus for purifying water in a pool such as a normal pool, a warm water pool, a whirlpool and the like. In the present invention, the pool includes not only a normal swimming pool, but also all whirlpools, various recreational baths, hot springs, and the like that are deployed in sports clubs, Kurhauss, health lands, and the like.

[0002]

2. Description of the Related Art With the recent health boom, health clubs such as sports clubs, multi-purpose hot spring (bath) recreation centers, so-called Kurhauss and health lands are increasing. Such facilities are equipped with a large number of swimming pools, such as swimming pools, whirlpools such as jacuzzi and whirlpools, various types of baths such as tapping water and kabirayu, and hot springs. Is available.

[0003] Since it is an absolute condition that such a health facility is safe and sanitary, the sanitary condition of the pool, particularly the water quality, must be strictly controlled. Therefore, the demand for a purification device that determines the water quality of the pool is becoming more and more strict, and the performance is increased and the size is increased accordingly.

The pool water purifier generally includes a filtering device for removing various impurities such as dust and hair contained in the pool water, an adsorptive purifier for removing finer impurities such as oil, and sterilization of the pool water. Sterilization device to be performed, if necessary, a device for supplying a filter aid to the filtration device, in a heated pool or bath, heating of pool water, heating means, etc.
It is composed of a number of devices, pipes connecting them, and a control device for controlling these. Purification of pool water by such a pool water purification apparatus is usually performed in the order of preliminary filtration → filtration → sterilization → adsorption purification.

[0005]

Among the sterilization means for pool water from which impurities have been removed by a filtration device, sterilization using ozone or sterilization using ultraviolet irradiation is known as a means capable of performing high-level sterilization. By disposing an ultraviolet lamp etc. in the sterilizer to generate ozone,
Alternatively, the ozone is directly introduced into the pool water into the sterilizer, or both are used in combination, whereby the pool water and ozone are brought into contact, preferably sufficiently mixed, to perform advanced sterilization.

However, the pool water that has been sterilized is usually introduced into an adsorption / purification apparatus, where it is adsorbed / purified with activated carbon or the like to remove fine impurities such as oil and decomposed products of bacteria. When the pool water sterilized by ozone is adsorbed and purified by activated carbon or the like, there is a problem that the adsorbent such as activated carbon is deteriorated in a short period of time.

That is, ozone remains in the pool water after ozone sterilization and is mixed. If the pool water containing residual ozone is adsorbed and purified by activated carbon or the like, the adsorbent such as activated carbon is destroyed by the residual ozone, and the purification effect is deteriorated in a very short time. Therefore, a desired pool water purification effect cannot be obtained by the pool water purification device, and the adsorbent of the adsorption purification device needs to be replaced in a short period of time.

[0008] An object of the present invention is to solve the above-mentioned problems of the prior art, in which sterilizing means sterilizes a high-grade pool water to which ozone or further gaseous carbon dioxide is applied, and further distributes the water downstream of the pool water. An object of the present invention is to provide a pool water purifying apparatus in which the adsorbent of the adsorbing and purifying means does not deteriorate over a long period of time.

[0009]

In order to achieve the above object, the present invention provides a pool water purification apparatus having at least a filtration means, a sterilization means provided downstream thereof, and an adsorption purification means provided downstream thereof. Wherein the pool water is sterilized by the sterilizing means by ultraviolet irradiation, followed by ozone sterilization, and again by ultraviolet irradiation.

It is preferable that the ozone sterilization is performed by blowing ozone gas into the pool water after irradiation with ultraviolet rays.

Preferably, the ozone sterilization is performed by blowing ozone gas and carbon dioxide gas into the pool water after irradiation with ultraviolet rays.

Preferably, the filtering means uses a ceramic filter.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pool water purification apparatus of the present invention will be described.
This will be described in detail with reference to a preferred embodiment shown in the accompanying drawings.

FIG. 1 conceptually shows a pool water purifying apparatus (hereinafter referred to as a purifying apparatus) of the present invention. Although omitted in the following description, various pipes, valves, cocks, three-way cocks, check valves, solenoid valves, and the like are arranged in necessary places in the purification device 10 in the illustrated example, and pool water is provided. It is natural that a flow path is formed and control is performed.

The purification device 10 shown in FIG.
2 for purifying the pool water, and is basically composed of a pre-filter 22, a ceramic filter 24, a sterilizer 26, an adsorption / purification device 28, and a circulation pump 30. Things.

In the illustrated example, the pool water overflowed from the pool 12 or discharged by a pump or the like flows into the purification device 10 through the inflow line 20.

The pool water that has flowed in is introduced into the pre-filter 22 by suction by the circulation pump 30 or by a drop from each pool, thereby removing large impurities such as hair and dust.

Next, the water flows into the circulation pump 30,
It is discharged and flows into the ceramic filter 24.

The ceramic filter 24 has a number of cylindrical ceramic filters inside, and water is filtered by passing through the wall from the outside of the ceramic filter to remove fine impurities such as oil released from the human body. It is. Ceramic filters are very fine, e.g.
Ultrafine particles of about 0.25 to 1 μm, such as organic substances such as oil released from the human body, which have a filtration space of about m three-dimensionally and cannot be filtered with a conventional filter, are also suitable. Can be filtered.

In addition, unlike a conventionally used filter, there is no difference in performance depending on the water temperature, so that water of any water temperature can be suitably filtered.

The filtering means applied to the pool water purification apparatus of the present invention is not limited to such a ceramic filter, and any of various known pool water filtering means can be applied.

The pool water, which has been filtered by the ceramic filter 24, then flows into the sterilizer 26.

The sterilizing device 26 is a characteristic portion of the present invention, and includes a first ultraviolet irradiation section 26a and an ozone introduction section 26b.
And a second ultraviolet irradiation unit 26c. That is, in the purification device 10 of the present invention, sterilization of the pool water after the filtration is performed by ultraviolet irradiation → mixing of ozone (plus carbon dioxide gas) → irradiation of ultraviolet rays again.

As described above, a method of applying ozone and a method of additionally using ultraviolet irradiation are known as methods for highly sterilizing pool water. However, in this method, since ozone remains in the pool water, the adsorbent such as activated carbon and zeolite deteriorates in a short period of time in the adsorption purification device provided downstream. As a result of intensive studies to solve this problem, the present inventor has found that residual ozone can be suitably removed by irradiating the pool water after ozone sterilization with ultraviolet rays. this is,
It is presumed that the ozone is changed to oxygen by irradiating the water containing ozone with ultraviolet rays.

Therefore, according to the present invention in which pool water is irradiated again with ultraviolet rays after irradiation with ultraviolet rays and sterilization with ozone utilizing this property, the decomposed products of bacteria and oil remaining in the pool water are adsorbed and purified. Can be prevented from being deteriorated by ozone such as activated carbon and zeolite disposed in the adsorption and purification apparatus, and the purification capacity of the pool water purification apparatus 10 can be maintained in a predetermined state, and the running cost of the apparatus can be significantly reduced. Can be reduced.

It is preferable to wipe off carbon dioxide together with ozone. By applying a mixed gas of ozone and carbon dioxide in the ozone introduction part 26b, the protein in the pool water absorbs carbon dioxide and promotes the bactericidal action of ozone, so that harmful bacteria such as Escherichia coli can be suitably repelled. And the bactericidal action can be enhanced.

FIG. 2 shows an example of a specific configuration of such a sterilizer 26.

The sterilizing apparatus 26 shown in FIG. 2 has a second ultraviolet irradiation section 26c of the outermost layer, a first ultraviolet irradiation section 26a of the intermediate layer, and an ozone (and carbon dioxide) introduction section 2 of the innermost layer.
6b and a three-layer cylindrical housing. Further, in this sterilizer 26, the first ultraviolet irradiation section 26a of the intermediate layer passes through the second ultraviolet irradiation section 26c of the outermost layer.
, Two ultraviolet lamps 36, 36 from the top
Are provided, and ozone introduction ports 38, 38 connected to a known ozone generator are formed in the innermost ozone introduction section 26b.

In the sterilizing apparatus 26 shown in the drawing, the pool water flowing out of the ceramic filter 24 is transported by the pipe 35 and flows into the sterilizing apparatus 26 through the inflow pipe 37. First, the first ultraviolet irradiation section 26a of the intermediate layer Flows into.

The first ultraviolet irradiation section 26a is constituted by a cylindrical housing whose upper surface is closed, and the ultraviolet lamps 36 are disposed from above as described above. Further, a cylindrical body 40 is disposed at the center portion so as to penetrate the upper surface, and this portion constitutes an ozone introduction portion 26b described later. The pool water flowing in from the inflow pipe 37 moves upward from below in the first ultraviolet irradiation section 26a, is irradiated with ultraviolet rays from the ultraviolet lamps 36, 36, is sterilized by ultraviolet rays, and flows into the ozone introduction section 26b from above. I do.

The ozone introduction section 26b is provided with the above-mentioned cylindrical body 4
0, and a cylindrical housing closed so as to accommodate the cylindrical body 40 and the bottom surface of which is closed.
8 is formed, and ozone gas or further carbon dioxide gas is introduced. The pool water that has flowed in from the first ultraviolet irradiator 26a flows downward in the housing, and is bubbled by the ozone gas blown from the ozone inlets 38, 38, and is sufficiently contacted with the ozone to be sterilized with ozone. Then, it flows into the cylindrical body 40, flows upward, and flows into the outermost second ultraviolet irradiation section 26c.

The second ultraviolet irradiation section 26c is basically constituted by a cylindrical housing having a closed end face forming the outer shell of the sterilizer 26, and discharges the sterilized pool water downward to a pipe 35. Is formed.
As described above, the ultraviolet lamps 36 are provided on the upper surface of the housing. The pool water flowing in from the ozone inlet 26b is directed upward by ultraviolet lamps 36, 36.
Irradiated by UV light from Here, the pool water contains ozone introduced by the ozone introduction unit 26b, but as described above, when the ultraviolet light is irradiated, the ozone is changed to oxygen and the like is removed. The generated gas such as oxygen is discharged from an air vent 44 disposed on the upper part, while the pool water from which ozone has been removed is discharged from a discharge pipe 42.
The water is then discharged to the pipe 35 and sent to the adsorption purification device 28 disposed downstream.

The pipe 35, the inflow pipe 37 and the discharge pipe 42 have valves 48, 50 and 52, respectively.
Is installed, the flow path of the pool water is switched, and the sterilizer 26 is provided.
Without passing through.

The sterilized water then flows into the adsorption purification device 28. The adsorption / purification device 28 adsorbs bacteria and the like decomposed by the sterilization device 26 using activated carbon and zeolite, and removes these contained in water. Here, ozone sterilization is applied in the purification device 10 of the present invention. However, as described above, ozone is decomposed into oxygen and suitably removed by the sterilization device 26 (second ultraviolet irradiation unit 26c) as described above. Activated carbon and zeolite are hardly deteriorated, and a predetermined adsorption purification ability can be exhibited over a long period of time.

The water discharged from the adsorption and purification device 28 is supplied to the pool 12 from the supply line 18.

In the purification device 10 shown in the drawing, a filter aid tank 31 is connected to the ceramic filter 24. That is, in the illustrated example, the filtering means of the pool water is constituted by the filter aid supply means including the pre-filter 22, the ceramic filter 24 and the filter aid tank 31. The filter aid tank 31 is internally divided into two tanks, each of which is filled with a powdery filter aid such as diatomaceous earth and a mixture of fibrous filter aid such as pulp fiber and water as filter aids. .

As described above, the ceramic filter is 0.2
It has very fine pores of about 5 to 1 μm in three dimensions. If it is applied to purified water as it is, it will be clogged immediately. In extreme cases, expensive ceramic filters cannot be used. Will be. Therefore, it is preferable to prevent the ceramic filter from being clogged by forming a filter aid layer on the outer cylindrical portion of the cylindrical ceramic filter and to facilitate regular backwashing and cleaning.

It is to be noted that any known filter aid can be used, and a method of forming a filter aid layer on a ceramic filter may be a known method.

The purifying apparatus 10 in the illustrated example has a backwashing / cleaning device 32 for backwashing and cleaning the ceramic filter 24 as a preferred embodiment. Although there is no particular limitation on the method of this backwashing, a ceramic filter washing method disclosed in Japanese Patent Application No. 2-35029 by the present applicant is preferably applied.

By applying the above-described purifying device 10 to the purifying system 10 of the present invention, it is possible to purify and sterilize water, which is impossible with a normal purifying device, and to make each pool extremely sanitary. Can be held. In addition,
As a purifying apparatus to which such a ceramic filter is applied, a device disclosed in Japanese Patent Application Laid-Open No. 2-137503 by the present applicant is particularly preferably exemplified. Further, needless to say, an auxiliary tank and a heat exchanger may be provided as needed.

FIG. 3 shows an example in which the pool water purification apparatus of the present invention is integrally unitized.

The purifying device 102 in the illustrated example is basically composed of a total of ten cylindrical housings.

The outermost first housing 104 has a cylindrical shape whose upper end face is closed,
An inlet pipe 103 to which the inflow line 20 is connected is formed, and a cylindrical ceramic filter 106 is provided therein.
06, which is filtered by passing through the wall from outside to remove fine impurities such as oil released from the human body. The purifying device 102 in the illustrated example has such a cylindrical filter,
Preferably, the basic structure of the ceramic filter 106 is that an adsorption / purification unit and / or a sterilization unit described below is disposed inside the ceramic filter 106.

A second housing 108 is arranged inside the first housing 104. The second housing 108 forms a flow path of pool water that has passed through the ceramic filter 106, has a cylindrical shape, and has a pool water discharge pipe 110 formed below the outer wall. Such a second
In the housing 108, the inside of the wall forming the cylinder serves as a flow path for pool water.

The third housing 112 is arranged inside the second housing 108. The third housing 112
Like the above-mentioned second housing 108, the inside of a wall forming a cylinder has a cylindrical shape that serves as a flow path for pool water, and the upper end of the inner wall has an inlet through which pool water flows from a fourth housing described later. A discharge pipe 114 is formed below the outer wall and connected to a supply line 18 to the pool 12 below the outer wall.

The third housing 112 serves as an adsorbing and purifying means of the purifying apparatus 102 of the present invention, in which activated carbon 116 (and / or zeolite) is disposed.
Adsorb bacteria and the like decomposed by sterilization means described below,
Remove these from the pool water.

The fourth housing 118 is arranged inside the third housing 112. The fourth housing 118 is
Like the second housing 108 described above, the inside of a wall forming a cylinder has a cylindrical shape that serves as a flow path for pool water, and an introduction pipe 12 for introducing pool water is provided below the outer wall.
0 is formed, and the upper end of the outer wall is formed in the third housing 11.
2 outlet.

The seventh housing 122 is arranged inside the fourth housing 118. The seventh housing 122 includes:
It serves as a path for introducing pool water to the ultrafilter 124, and has a configuration in which the inside of a wall forming a cylinder serves as a flow path for pool water, a discharge pipe 123 is formed below, and an upper part of the inner wall is formed. An inlet for pool water into the eighth housing 126.

An eighth housing 126 is arranged inside the seventh housing 122. In the purification device 102 of the illustrated example, not all of the pool water introduced from the seventh housing 122 is subjected to ultrafiltration, and part of the pool water passes through the ultrafilter 124 without being subjected to ultrafiltration. 8 The housing 126 is directly downstream (hereinafter, referred to as overflow). The eighth housing 126 serves as a supply path for pool water to the ultrafilter 124 and a drain path for pool water overflowing from the ultrafilter 124. In the eighth housing 126, an inlet for pool water into the ultrafilter 124 and a closing portion 128 for introducing pool water into the ultrafilter 124 are formed. The eighth housing 1
The 26 outlet pipes 130 are connected to the inflow line 20.

A ninth housing 132 is arranged inside the eighth housing 126. The ninth housing 132
The ultrafiltration device 124 is held, and a water path of the pool water having completed the ultrafiltration is formed.

Ultrafiltration refers to the application of a hollow fiber membrane or the like, viruses which cannot be separated by the ceramic filter 106 and are smaller than fungi, such as AIDS virus, influenza virus, Japanese encephalitis virus and hepatitis virus. The purification device 102 has an ultrafiltration device 124 for performing ultrafiltration, thereby purifying the pool water at a higher level and keeping the pool 12 more clean.

The hollow fiber membrane applied to the ultrafiltration device 124 of the present invention is not particularly limited, and various known hollow fiber membranes for ultrafiltration can be used. Kuraray UF filters (manufactured by Kuraray Co., Ltd.) ) Are suitably exemplified.

In the purifying apparatus 102 shown in the drawing, an ultrasonic generator 138 for facilitating backwashing is provided in the ultrafilter 124 as a preferred embodiment. The ultrasonic generator 138 is supported on the upper surface of the first housing 104, and is disposed so as to pass through the ultrafilter 124.

When the use of the ultrafilter 124 is continued, the hollow fiber membrane 114a is clogged by the separated virus or the like, and the processing capacity of the ultrafilter 124 is reduced. Therefore, in order to maintain a predetermined processing capacity, the ultrafilter 1
24 (hollow fiber membrane) needs to be periodically cleaned.
Has a backwashing and cleaning means.
The ultrasonic generator 138 improves the cleaning efficiency of the backwash by oscillating the hollow fiber membrane by ultrasonic waves during the backwash.

The tenth housing 140 is disposed inside the ninth housing 132. Tenth housing 140
Forms a path for introducing washing water during backwashing of the ultrafilter 124, and is connected to the ninth housing 132 at the top.

The fifth housing 142 is arranged inside the tenth housing 140. The fifth housing 142 has a cylindrical shape in which the inside of a wall forming a cylinder serves as a flow path for pool water, and the upper end of the inner wall serves as an inlet through which pool water flows. Is the discharge pipe 14
4 are formed.

A sixth housing 136 is arranged inside the fifth housing 142. The sixth housing 136 forms a sterilizing means which is a characteristic member of the present invention, has a cylindrical shape, and has an ultraviolet lamp 146 disposed from above.

The ultraviolet lamp 146 has a masking portion 148 formed at the center thereof, and an ozone gas inlet 150 is formed near the lower end of the masking portion 148. As will be described in detail later, in the sixth housing 136, the pool water flows upward from below. Therefore, the pool water is sterilized by ultraviolet rays below the sixth housing 136, sterilized by ozone (carbon dioxide) in the central part, and irradiated again with ultraviolet rays in the upper part to remove the remaining ozone. The sixth housing 136
An air vent filter 152 that does not allow water to pass through but allows air to pass is provided on the upper surface of the device, and the generated ozone gas, oxygen gas, and the like are discharged.

An introduction pipe 154 is formed below the outer wall of the sixth housing 136.

The purifying device 102 in the illustrated example is formed by inserting and combining the second to tenth housings inside the first housing 104, whereby
Activated carbon 116 serving as an adsorption purifying means and an ultraviolet lamp 146 serving as a sterilizing means are arranged inside a cylindrical ceramic filter 106. With such a configuration, the purification device can be made extremely compact despite having the adsorption purification means and / or the sterilization means. In addition, since these units can be integrated into a unit, the unit can be installed on site after the unit is manufactured, and the installation work can be facilitated.

Hereinafter, the purifying operation of the pool water by the purifying apparatus 102 will be described. Although omitted for simplicity of the drawing and clarification of the description, it is needless to say that the respective inlet pipes and outlet pipes are connected by necessary pipes.

The pool water from which large impurities such as hair and dust have been removed by the pre-filter flows into the first housing 104 through the inlet pipe 103 through the inflow line 20 and passes through the wall from outside of the ceramic filter 106. The fine particles are filtered to remove fine impurities, flow into the second housing 108, flow out of the housing through the discharge pipe 110, and flow into the seventh housing 122 through the introduction pipe 120.

The pool water flowing from the inlet pipe 120 rises in the seventh housing 122 and flows into the eighth housing 126 from the inlet.

As described above, the closing portion 128 is formed in the eighth housing 126 so that the pool water flows into the ultrafiltration device 124. Not all of the pool water that has flowed in is subjected to ultrafiltration, but part is subjected to ultrafiltration by the ultrafilter 124, and the rest overflows back into the eighth housing 126 and goes downstream.

The pool water flowing into the ultrafilter 124 is
Virus and the like are removed by passing through the side wall of the hollow fiber membrane, flow down the hollow fiber membrane, flow out of the ultrafilter 124, flow down the ninth housing 132, flow out of the discharge pipe 134, and are introduced. It flows into the sixth housing 136 through the pipe 154.

On the other hand, the pool water that has not been subjected to ultrafiltration and has overflowed is discharged downstream of the eighth housing 126 through the discharge pipe 130, and is discharged from the pool 12 to the purification device 10.
The water of the pool water flowing into 2 is sucked into the inflow line 20 and again flows into the purification device 102.

The pool water flowing into the sixth housing 136 from the inlet pipe 154 is sterilized by ultraviolet rays and ozone while flowing upward. First, ultraviolet rays are irradiated below the ultraviolet lamp 146 to sterilize the ultraviolet rays. Then
When it rises to the masking portion 148 of the ultraviolet lamp 146, it is bubbled with ozone gas (or further carbon dioxide gas) introduced from the inlet 150, sufficiently mixed, and sterilized with ozone. When the ozone sterilization is further completed and the pool water rises above the masking section 148, the pool water is again irradiated with ultraviolet rays, and the remaining ozone is removed. Therefore, the pool water flowing out from the upper part of the sixth housing 136 contains little ozone,
The activated carbon 116 (and / or zeolite) of the third housing 112 does not deteriorate.

The sterilized pool water flows into the fifth housing 142 from above, descends and flows out of the housing through the discharge pipe 144, and flows out of the fourth housing 1 through the introduction pipe 120.
18 and ascends to the third housing 1 through the outlet above the fourth housing 118 (the inlet of the third housing).
It flows into 12.

The pool water flowing into the third housing 112 passes through the activated carbon 116 (and / or zeolite) while descending, and bacteria and the like decomposed into ozone and ultraviolet rays are adsorbed and removed by the activated carbon 116 and discharged. Tube 130
From the supply line 18 and returned to the pool 12.

On the other hand, the tenth housing 140, the ninth housing 132, the eighth housing 126, and the ultrasonic generator 138 form a reverse-line cleaning means of the ultrafilter 124. While the hollow fiber membrane of the outer filter 124 is vibrated, the backwashing and washing are performed.

When performing the reverse line cleaning of the ultrafilter 124, the cleaning water flows into the discharge pipe 134 of the ninth housing 132 and the introduction pipe of the tenth housing 140, and the cleaning water flows into the ultrafilter 124. By penetrating into the hollow fiber membrane from the upper and lower parts and passing through the side wall of the hollow fiber membrane from the inside,
Removes impurities such as viruses adsorbed on the outer wall of the hollow fiber membrane.

The cleaning solution containing impurities such as virus that has passed through the side wall of the hollow fiber membrane flows into the eighth housing 126 through the inlet 119, and is discharged from a discharge path (not shown).

It is needless to say that the purifying apparatus shown in FIG. 3 may have a reverse cleaning device for the ceramic filter 106, a supply device for the filter aid, and the like. Further, needless to say, an auxiliary tank and a heat exchanger may be provided as needed.

Although the pool water purifying apparatus according to the present invention has been described in detail above, the present invention is not limited to this, and various improvements and changes are made without departing from the scope of the present invention. Of course it is good.

[0075]

As described above in detail, according to the pool water purifying apparatus of the present invention, although the high-grade pool water to which ozone is applied is sterilized by the sterilizing means, it is arranged downstream of the pool water. The adsorbent of the adsorption / purification means does not deteriorate over a long period of time, so that a predetermined purification capability can be suitably maintained for a long period of time, and the running cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a pool water purification device of the present invention.

FIG. 2 is a schematic diagram showing an example of a sterilizing device of the pool water purification device shown in FIG.

FIG. 3 is a conceptual diagram of another example of the pool water purification device of the present invention.

[Explanation of symbols]

 10, 102 Pool water purifier 12 Pool 24, 106 Ceramic filter 26 Sterilizer 26a First ultraviolet irradiation unit 26a 26b Ozone (ozone and carbon dioxide) introduction unit 26b 26c Second ultraviolet irradiation unit 26c 28 Adsorption purification unit 104 First housing 108 second housing 112 third housing 118 fourth housing 122 seventh housing 126 eighth housing 132 ninth housing 140 tenth housing 142 fifth housing 148 sixth housing 146 ultraviolet lamp

Claims (4)

(57) [Claims] 1. A pool water purification apparatus having at least a filtration unit, a sterilization unit disposed downstream thereof, and an adsorption purification unit disposed downstream thereof, wherein the sterilization of the pool water by the sterilization unit is performed by ultraviolet irradiation. A pool water purification apparatus characterized by performing ozone sterilization, which is performed next, and ultraviolet irradiation again. 2. The ozone sterilization is performed by injecting ozone gas into pool water after ultraviolet irradiation.
A pool water purification apparatus according to claim 1. 3. The pool water purification apparatus according to claim 1, wherein the ozone sterilization is performed by blowing ozone gas and carbon dioxide gas into the pool water after irradiation with ultraviolet rays. 4. The pool water purifying apparatus according to claim 1, wherein said filtering means uses a ceramic filter.