JP3226862U - Sterilizer - Google Patents

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JP3226862U
JP3226862U JP2020001201U JP2020001201U JP3226862U JP 3226862 U JP3226862 U JP 3226862U JP 2020001201 U JP2020001201 U JP 2020001201U JP 2020001201 U JP2020001201 U JP 2020001201U JP 3226862 U JP3226862 U JP 3226862U
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ozone
hot water
hot
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water
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敬太 住谷
敬太 住谷
正人 小森
正人 小森
木村 哲也
哲也 木村
雅弘 藤田
雅弘 藤田
信裕 猿木
信裕 猿木
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Yamato Co Ltd
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Abstract

【課題】オゾンを用いてレジオネラ属菌を含む細菌の殺菌を行う殺菌装置を提供する。特に、アルカリ性の湯水に対し安全で低コストな殺菌装置を提供する。【解決手段】オゾンを発生するオゾン発生装置32と、温浴設備100の湯配管20に設けられたオゾン注入配管50と、オゾン注入配管に設置されオゾン発生装置で生成したオゾンを注入する気液混合部40と、気液混合部にオゾン発生装置で生成したオゾンを供給するオゾン供給管34と、を有し、オゾン注入配管が湯配管中を流下する湯水にオゾンを注入し、濾過器28及び湯配管経路内を殺菌する。溶存オゾン濃度が湯水に対して0.1mg/L〜1.4mg/Lである。温浴設備の湯水がアルカリ性であり、アルカリ性の湯水に対しオゾンを注入することでオゾンを加水分解させてヒドロキシルラジカルを生成し、ヒドロキシルラジカルによって濾過器及び湯配管経路内を殺菌する。【選択図】図1PROBLEM TO BE SOLVED: To provide a sterilizing device for sterilizing bacteria including Legionella bacteria by using ozone. In particular, it provides a safe and low-cost sterilizer for alkaline hot water. SOLUTION: An ozone generator 32 for generating ozone, an ozone injection pipe 50 provided in a hot water pipe 20 of a hot bath facility 100, and a gas-liquid mixture for injecting ozone generated by the ozone generator installed in the ozone injection pipe. It has a section 40 and an ozone supply pipe 34 for supplying ozone generated by an ozone generator to the gas-liquid mixing section, and the ozone injection pipe injects ozone into the hot and cold water flowing through the hot water pipe, and the filter 28 and Sterilize the inside of the hot water piping path. The dissolved ozone concentration is 0.1 mg/L to 1.4 mg/L with respect to hot water. The hot water of the hot bath facility is alkaline, and by injecting ozone into the alkaline hot water, the ozone is hydrolyzed to generate hydroxyl radicals, and the hydroxyl radicals sterilize the inside of the filter and the hot water pipe route. [Selection diagram] Figure 1

Description

本考案は、温浴設備の特にレジオネラ属菌に対する殺菌装置に関するものである。 The present invention relates to a sterilization device for a hot bath facility, particularly for Legionella spp.

温浴施設や宿泊施設等の大浴場では浴槽に貯留した湯水を循環、濾過、殺菌して再利用するものも多い。しかしながら、一般的な次亜塩素酸系の殺菌剤は水質条件によってはレジオネラ属菌に対する殺菌効果が低下することがあり、循環式の温浴設備におけるレジオネラ属菌の人間への感染が問題となっている。この問題点に対し、本願考案者らはレジオネラ属菌の温床が濾過器にあることに着目し、濾過器の逆洗時にエアレーションを行う下記[特許文献1]に記載の発明を行った。 In large baths such as hot bath facilities and accommodation facilities, there are many cases in which hot water stored in a bathtub is circulated, filtered, sterilized, and reused. However, a general hypochlorous acid-based bactericide may reduce the bactericidal effect on Legionella spp. depending on the water quality condition, and infection of Legionella spp. There is. With respect to this problem, the inventors of the present application focused on the fact that the hot bed of Legionella spp. is in the filter, and made the invention described in the following [Patent Document 1] in which aeration is performed during backwashing of the filter.

特開2005−193214号公報JP, 2005-193214, A

[特許文献1]に記載の発明のように、濾過器の洗浄等によってレジオネラ属菌の温床を除去することは菌の増殖抑制に有効な手段の一つである。しかしながら、レジオネラ属菌のさらなる増殖抑制のためには、様々なアプローチから複合的な対策を講じることが望ましい。 As in the invention described in [Patent Document 1], removing the hot bed of Legionella spp. by washing the filter is one of the effective means for suppressing the growth of the sputum. However, in order to further suppress the growth of Legionella bacteria, it is desirable to take multiple measures from various approaches.

特に、アルカリ性の温泉水(アルカリ性泉)に対しては一般的な次亜塩素酸系の殺菌剤による高濃度遊離塩素処理の殺菌効果が弱まることが報告されており、これに替わる殺菌処理として結合型塩素によるモノクロラミン処理が提案されている。ここで、モノクロラミンとはアンモニアと塩素が結合した化合物であり、遊離塩素と比較して残留性に優れ、アルカリ性の溶液中でも殺菌効果が持続することが知られている。しかしながら、モノクロラミンによる殺菌処理では有害な亜硝酸窒素が生成する可能性が有り、また薬剤コストも高いという問題点がある。 In particular, it has been reported that the bactericidal effect of high-concentration free chlorine treatment with a general hypochlorous acid bactericide is weakened against alkaline hot spring water (alkaline spring). Monochloramine treatment with chlorine type has been proposed. Here, monochloramine is a compound in which ammonia and chlorine are bound to each other, and is known to have excellent residual properties as compared with free chlorine and to maintain the bactericidal effect even in an alkaline solution. However, sterilization treatment with monochloramine has a problem that harmful nitrous nitrite may be generated and the cost of the drug is high.

本考案は上記事情に鑑みてなされたものであり、オゾンを用いてレジオネラ属菌含む細菌の殺菌を行う殺菌装置の提供を目的とする。特に、アルカリ性の湯水に対し安全で低コストな殺菌装置の提供を目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sterilizing apparatus for sterilizing bacteria including Legionella bacteria by using ozone. In particular, it is an object of the present invention to provide a safe and low-cost sterilizer for alkaline hot water.

本考案は、
(1)オゾンを発生するオゾン発生装置32と、温浴設備100の湯配管20に設けられたオゾン注入配管50と、前記オゾン注入配管50に設置され前記オゾン発生装置32で生成したオゾンを注入する気液混合部40と、前記気液混合部40に前記オゾン発生装置32で生成したオゾンを供給するオゾン供給管34と、を有し、前記オゾン注入配管50が前記湯配管20中を流下する湯水にオゾンを注入し、濾過器28及び湯配管経路内を殺菌することを特徴とする殺菌装置80を提供することにより、上記課題を解決する。
(2)溶存オゾン濃度が湯水に対して0.1mg/L〜1.4mg/Lであることを特徴とする上記(1)記載の殺菌装置80を提供することにより、上記課題を解決する。
(3)温浴設備100の湯水がアルカリ性であり、前記アルカリ性の湯水に対しオゾンを注入することで前記オゾンを加水分解させてヒドロキシルラジカルを生成し、前記ヒドロキシルラジカルによって濾過器28及び湯配管経路内を殺菌することを特徴とする上記(1)または(2)に記載の殺菌装置80を提供することにより、上記課題を解決する。
(4)オゾン供給管34が気液混合部40もしくはオゾン発生装置32に対して着脱が可能であり、さらに前記オゾン発生装置32が移動可能な可搬型のオゾン発生装置32であることを特徴とする上記(1)乃至(3)のいずれかに記載の殺菌装置80を提供することにより、上記課題を解決する。
The present invention
(1) An ozone generator 32 for generating ozone, an ozone injection pipe 50 provided in the hot water pipe 20 of the warm bath facility 100, and ozone generated by the ozone generator 32 installed in the ozone injection pipe 50 are injected. It has a gas-liquid mixing section 40 and an ozone supply pipe 34 for supplying ozone generated by the ozone generator 32 to the gas-liquid mixing section 40, and the ozone injection pipe 50 flows down in the hot water pipe 20. The above problem is solved by providing a sterilizing device 80 characterized by injecting ozone into hot water to sterilize the inside of the filter 28 and the hot water piping path.
(2) Dissolved ozone concentration is 0.1 mg/L to 1.4 mg/L in hot and cold water, and by providing the sterilizer 80 described in (1) above, the above problems are solved.
(3) The hot and cold water of the warm bath facility 100 is alkaline, and by injecting ozone into the alkaline hot and cold water, the ozone is hydrolyzed to generate hydroxyl radicals, and the hydroxyl radicals cause the filter 28 and the hot water pipe passage The above problem is solved by providing the sterilizing apparatus 80 according to the above (1) or (2), which is characterized by sterilizing.
(4) The ozone supply pipe 34 is removable from the gas-liquid mixing section 40 or the ozone generator 32, and the ozone generator 32 is a movable ozone generator 32. By providing the sterilizer 80 according to any one of (1) to (3) above, the above problems are solved.

本考案に係る殺菌装置は、オゾンを湯水に注入することで濾過器及び湯配管経路内の殺菌を行う。特に、注入する湯水がアルカリ性の場合においても優れた殺菌能力を有する。これにより、アルカリ性の温浴設備に対する殺菌を安全かつ低コストで行う事ができる。 The sterilizer according to the present invention injects ozone into hot water to sterilize the inside of the filter and hot water piping path. In particular, it has an excellent sterilizing ability even when hot water to be injected is alkaline. This makes it possible to sterilize the alkaline hot bath facility safely and at low cost.

本考案に係る殺菌装置を備えた温浴設備の概略構成図である。1 is a schematic configuration diagram of a hot bath facility equipped with a sterilizer according to the present invention. オゾンの注入時間と溶存オゾン濃度の関係を示すグラフである。5 is a graph showing the relationship between ozone injection time and dissolved ozone concentration. オゾンの注入時間とレジオネラ属菌及び一般細菌の数を示すグラフである。It is a graph which shows the injection time of ozone, and the number of Legionella spp. and general bacteria. 溶存オゾン濃度とレジオネラ属菌の数を示すグラフである。It is a graph which shows the dissolved ozone concentration and the number of Legionella spp. オゾン注入前後のレジオネラ属菌の数の推移を示すグラフである。It is a graph which shows transition of the number of Legionella spp. before and after ozone injection.

本考案に係る殺菌装置について図面に基づいて説明する。ここで、図1は、本考案に係る殺菌装置80と、これを備えた温浴設備100の概略構成図である。尚、本考案は特にアルカリ性泉の温浴設備に好適なものであるが、浴水はこれに限定されるものではなく、各種温泉水、地下水、水道水等、如何なる浴水にも適用することが可能である。また、本考案に係る殺菌装置は基本的に循環型の温浴設備に好適なものであるが、特にこれに限定されるものではない。 A sterilizer according to the present invention will be described with reference to the drawings. Here, FIG. 1 is a schematic configuration diagram of a sterilizer 80 according to the present invention and a hot bath facility 100 including the same. The present invention is particularly suitable for a hot bath facility of an alkaline spring, but the bath water is not limited to this, and can be applied to any bath water such as various hot spring water, ground water, tap water, etc. It is possible. Further, the sterilizer according to the present invention is basically suitable for a circulation type hot bath facility, but is not particularly limited thereto.

先ず、温浴設備100は、所定の温度の湯水を貯留する浴槽10と、この浴槽10の湯水を殺菌、濾過、加温して循環させる湯配管20と、を備えている。また、湯配管20にはポンプ手段22が設置され、このポンプ手段22が動作することで吸水口12から浴槽10内の湯水を吸引し吐出口14から浴槽10内に還流させる。また、湯配管20の上流側には周知のヘアキャッチャ24が設けられ、毛髪等の比較的大きなゴミを捕集、除去する。また、ヘアキャッチャ24の下流側には、本考案に係る殺菌装置80と、所定の濾材が充填された濾過器28と、湯水に対して加温を行う加温手段29と、が接続する。さらに、浴槽10には温泉水、地下水、水道水等の水を適宜補水する給水配管16が接続する。尚、給水配管16には別途加熱手段を設け、予め適切な温度に加温した湯水を浴槽10に補水するようにしても良い。また、濾過器28には使用後もしくは余剰なオゾンを排出する排出配管26aが接続し、この排出配管26aはオゾンを分解して処理する排オゾン処理装置26に接続する。 First, the warm bath facility 100 includes a bathtub 10 that stores hot and cold water having a predetermined temperature, and a hot water pipe 20 that sterilizes, filters, heats, and circulates the hot and cold water in the bathtub 10. Further, pump means 22 is installed in the hot water pipe 20, and when the pump means 22 operates, hot water in the bathtub 10 is sucked from the water suction port 12 and recirculated into the bathtub 10 from the discharge port 14. A known hair catcher 24 is provided on the upstream side of the hot water pipe 20 to collect and remove relatively large dust such as hair. Further, a sterilizer 80 according to the present invention, a filter 28 filled with a predetermined filter material, and a heating means 29 for heating hot water are connected to the downstream side of the hair catcher 24. Further, a water supply pipe 16 for appropriately replenishing water such as hot spring water, ground water, and tap water is connected to the bathtub 10. The water supply pipe 16 may be provided with a separate heating means so that hot water heated in advance to an appropriate temperature is replenished in the bathtub 10. Further, the filter 28 is connected with an exhaust pipe 26a for exhausting the ozone after use or surplus, and the exhaust pipe 26a is connected to an exhaust ozone treatment device 26 for decomposing and treating ozone.

また、本考案に係る殺菌装置80は、オゾンを発生するオゾン発生装置32と、温浴設備100の湯配管20に設けられたオゾン注入配管50と、このオゾン注入配管50に設置されるとともにオゾン発生装置32で生成したオゾンをオゾン注入配管50内を流下する湯水に注入する気液混合部40と、この気液混合部40にオゾン発生装置32で生成したオゾンを供給するオゾン供給管34と、を有している。尚、オゾン注入配管50は湯配管20に直列に接続しても良いが、図1に示すように湯配管20に対し並列に接続することが好ましい。この場合、殺菌装置80はオゾン注入配管50への流路の切替と、オゾン注入配管50を流下する湯水の流量を調整する流量調整弁36a〜36cを有する。そして、オゾン注入配管50を並列に接続する構成では、殺菌装置80を比較的軽微な改造で既存の温浴設備100に設置することが可能となる。また、オゾン注入配管50への湯水の流量を独立して調整することができるため、殺菌装置80によるオゾンの注入量を比較的容易に制御することが可能となる。尚、殺菌装置80の設置位置に関しては湯配管20の経路上であれば特に限定は無いが、温浴設備100においては濾過器28がレジオネラ属菌等の最大の温床となる可能性が高いため、可能な限り濾過器28の直前に設けることが好ましい。 Also, the sterilizer 80 according to the present invention is installed in the ozone generator 32 for generating ozone, the ozone injection pipe 50 provided in the hot water pipe 20 of the hot bath facility 100, the ozone injection pipe 50, and the ozone generation. A gas-liquid mixing section 40 that injects ozone generated by the device 32 into hot water flowing in the ozone injection pipe 50, and an ozone supply pipe 34 that supplies ozone generated by the ozone generator 32 to the gas-liquid mixing section 40. have. Although the ozone injection pipe 50 may be connected in series to the hot water pipe 20, it is preferably connected in parallel to the hot water pipe 20 as shown in FIG. In this case, the sterilizer 80 has flow rate control valves 36a to 36c for switching the flow path to the ozone injection pipe 50 and adjusting the flow rate of the hot water flowing down the ozone injection pipe 50. With the configuration in which the ozone injection pipes 50 are connected in parallel, the sterilizer 80 can be installed in the existing hot bath facility 100 with a relatively minor modification. Further, since the flow rate of hot and cold water to the ozone injecting pipe 50 can be adjusted independently, it becomes possible to control the injecting amount of ozone by the sterilizer 80 relatively easily. There is no particular limitation on the installation position of the sterilizer 80 as long as it is on the route of the hot water pipe 20, but in the hot bath facility 100, the filter 28 is likely to be the largest hotbed of Legionella spp. It is preferably provided immediately before the filter 28.

また、殺菌装置80に用いるオゾン発生装置32に関しては特に限定は無く、例えば酸素濃縮部とオゾン生成部とを有した周知のオゾン発生装置を用いることができる。ただし、複数の浴槽10と湯配管20とを有する温浴施設では、移動可能な可搬型のオゾン発生装置32を用い一台のオゾン発生装置32を各湯配管20で適宜使い回すように構成することが設備コスト軽減の観点から好ましい。この場合、各湯配管20側にはオゾン注入配管50と気液混合部40と(流量調整弁36a〜36cと)をそれぞれ設け、オゾン供給管34は気液混合部40もしくはオゾン発生装置32に対して着脱可能なものを用いる。また、殺菌装置80を構成する気液混合部40に関しても特に限定は無いが、内部を流下する湯水の流速がオリフィス部で上昇することを利用してオゾンを注入するオリフィス型の気液混合器を用いることが好ましい。 The ozone generator 32 used in the sterilizer 80 is not particularly limited, and for example, a known ozone generator having an oxygen concentrating section and an ozone generating section can be used. However, in a hot bath facility having a plurality of bathtubs 10 and hot water pipes 20, a movable portable ozone generator 32 is used and one ozone generator 32 is appropriately used for each hot water pipe 20. Is preferable from the viewpoint of reducing equipment costs. In this case, an ozone injection pipe 50, a gas-liquid mixing section 40 (with flow rate adjusting valves 36a to 36c) are provided on each hot water piping 20 side, and an ozone supply pipe 34 is provided in the gas-liquid mixing section 40 or the ozone generator 32. Use something that is removable. The gas-liquid mixing section 40 that constitutes the sterilizer 80 is also not particularly limited, but an orifice-type gas-liquid mixer that injects ozone by utilizing the fact that the flow velocity of the hot water flowing down inside rises at the orifice section. Is preferably used.

次に、湯水中へのオゾンの注入量とレジオネラ属菌及び一般細菌の数の関係等に関する実験結果を以下に示す。尚、実験は容量10mで湯配管20の流量(オゾン注入配管50も含めた総流量)が220L/minのアルカリ性泉(浴水のpH7.6〜pH7.9)の温浴設備100にて行った。 Next, experimental results regarding the relationship between the amount of ozone injected into hot water and the numbers of Legionella spp. and general bacteria are shown below. The experiment was conducted in a hot bath facility 100 of an alkaline spring (bath water pH 7.6 to pH 7.9) having a capacity of 10 m 3 and a flow rate of the hot water pipe 20 (total flow rate including the ozone injection pipe 50) of 220 L/min. It was

先ず、図1中のA点(オゾン注入前循環水)、B点(オゾン注入後循環水)、C点(濾過水)、D点(浴槽水)における注入時間と溶存オゾン濃度の関係を図2に示す。尚、オゾン注入率はオゾン注入配管50に対して0.87mg/Lとした。ここで、図2及び後述の図3〜図5において、白丸がオゾン注入後循環水(B点)のデータを示し、黒丸が濾過水(C点)のデータを示し、黒四角印が浴槽水(D点)のデータを示し、黒三角印がオゾン注入前循環水(A点)のデータを示す。 First, the relationship between the injection time and the dissolved ozone concentration at point A (circulating water before ozone injection), point B (circulating water after ozone injection), point C (filtered water), point D (tub water) in FIG. 1 is shown. 2 shows. The ozone injection rate was 0.87 mg/L with respect to the ozone injection pipe 50. Here, in FIG. 2 and FIGS. 3 to 5 to be described later, white circles represent data of circulating water after ozone injection (point B), black circles represent data of filtered water (point C), and black squares represent bath water. The data of (Point D) is shown, and the black triangles show the data of circulating water before ozone injection (Point A).

図2から、オゾン注入後循環水(B点)の湯水中の溶存オゾン濃度は約0.5mg/Lで略一定であった。また、濾過器通過後の濾過水(C点)の溶存オゾン濃度は0.15mg/L〜0.3mg/Lであった。また、浴槽水(D点)及びオゾン注入前循環水(A点)の溶存オゾン濃度は0.15mg/L未満であった。尚、濾過水(C点)、浴槽水(D点)、及びオゾン注入前循環水(A点)の溶存オゾン濃度は注入時間が経過するにつれ若干増加傾向を示した。 From FIG. 2, the dissolved ozone concentration in the hot water of the circulating water (point B) after ozone injection was approximately constant at about 0.5 mg/L. Further, the dissolved ozone concentration of the filtered water (point C) after passing through the filter was 0.15 mg/L to 0.3 mg/L. The dissolved ozone concentration of the bath water (point D) and the circulating water before ozone injection (point A) was less than 0.15 mg/L. The dissolved ozone concentrations of the filtered water (point C), the bath water (point D), and the circulating water before ozone injection (point A) showed a slightly increasing tendency as the injection time passed.

次に、A点(オゾン注入前循環水)、C点(濾過水)、D点(浴槽水)におけるオゾンの注入時間とレジオネラ属菌の数(CFU/100mL)の関係を図3(a)に示す。また、オゾンの注入時間と一般細菌の数(個/ml)の関係を図3(b)に示す。図3(a)から、濾過水(C点)及び浴槽水(D点)に関しては、オゾンの注入時間が32分以降でレジオネラ属菌は不検出となった。また、オゾン注入前循環水(A点)ではオゾン注入時間が92分までは若干のレジオネラ属菌が検出されたもののオゾン注入時間が152分の時点で未検出となった。また、図3(b)から、一般細菌の数はオゾンの注入時間が増加するにつれ減少傾向を示した。 Next, FIG. 3(a) shows the relationship between the ozone injection time and the number of Legionella spp. (CFU/100 mL) at point A (circulating water before ozone injection), point C (filtered water), point D (bath water). Shown in. The relationship between the ozone injection time and the number of general bacteria (cells/ml) is shown in FIG. 3(b). From FIG. 3(a), regarding filtered water (point C) and bath water (point D), Legionella bacteria were not detected after the ozone injection time of 32 minutes. In the circulating water before ozone injection (point A), some Legionella spp. were detected until the ozone injection time was 92 minutes, but it was not detected at the ozone injection time of 152 minutes. Also, from FIG. 3(b), the number of general bacteria showed a decreasing tendency as the ozone injection time increased.

これらのことから、アルカリ性泉水へのオゾンの注入により、一般細菌、レジオネラ属菌ともに減少し、高い殺菌効果が認められた。尚、一般的にオゾンはアルカリ性の水溶液中では急速に分解し、このときの加水分解によってヒドロキシルラジカル、ヒドロペルオキシラジカル、過酸化水素等が生じると言われている。そして、このうち特にヒドロキシルラジカルはオゾンよりも酸化力が強く、優れた殺菌能力を有する。よって、本考案に係る殺菌装置80をアルカリ性の温浴設備100に用いることで、注入されたオゾンがアルカリ性の湯水中でヒドロキシルラジカルに加水分解し、このヒドロキシルラジカルが濾過器28及び湯配管経路内のレジオネラ属菌、一般細菌に対して強い殺菌効果を発揮するものと考えられる。尚、オゾン自体も殺菌効果を有しており、よって本考案はアルカリ性以外の温浴設備100に対しても殺菌効果を有する。 From these results, it was confirmed that by injecting ozone into the alkaline spring water, both general bacteria and Legionella bacteria were reduced, and a high bactericidal effect was observed. Incidentally, it is generally said that ozone is rapidly decomposed in an alkaline aqueous solution, and the hydrolysis at this time produces hydroxyl radicals, hydroperoxy radicals, hydrogen peroxide and the like. Of these, hydroxyl radical has a stronger oxidizing power than ozone and has an excellent sterilizing ability. Therefore, when the sterilizer 80 according to the present invention is used in the alkaline hot bath facility 100, the injected ozone is hydrolyzed into hydroxyl radicals in the alkaline hot water, and the hydroxyl radicals in the filter 28 and the hot water pipe passage It is considered to exert a strong bactericidal effect against Legionella and general bacteria. It should be noted that ozone itself also has a bactericidal effect, and thus the present invention has a bactericidal effect even on a hot bath facility 100 other than alkaline.

次に、オゾン注入前循環水(A点)における溶存オゾン濃度とレジオネラ属菌の数(CFU/100mL)の関係を図4に示す。図4から、溶存オゾン濃度が0.02mg/L、0.07mg/Lではレジオネラ属菌が検出されたものの、溶存オゾン濃度0.12mg/Lでは検出されず、よってこのことから湯水に対する溶存オゾン濃度は0.1mg/L以上、好適には0.12mg/L以上でレジオネラ属菌に対する有効な殺菌作用を有することが判る。尚、湯水に対する溶存オゾン濃度の上限値に関しては特に限定は無いが、オゾン発生装置32の能力とコストの面から1.4mg/L程度で十分と考えられる。 Next, FIG. 4 shows the relationship between the dissolved ozone concentration in the circulating water before ozone injection (point A) and the number of Legionella bacteria (CFU/100 mL). From FIG. 4, Legionella spp. were detected at the dissolved ozone concentrations of 0.02 mg/L and 0.07 mg/L, but were not detected at the dissolved ozone concentration of 0.12 mg/L. It can be seen that a concentration of 0.1 mg/L or more, preferably 0.12 mg/L or more has an effective bactericidal action against Legionella spp. The upper limit of the concentration of dissolved ozone in hot water is not particularly limited, but it is considered that 1.4 mg/L is sufficient from the viewpoint of the capacity and cost of the ozone generator 32.

次に、C点(濾過水)、D点(浴槽水)におけるオゾン注入前後のレジオネラ属菌の数(CFU/100mL)の推移を図5に示す。尚、図5の実験では測定開始から7日目に殺菌装置80によるオゾン注入(オゾン注入率:オゾン注入配管50に対して0.87mg/L)を3時間行った。図5からオゾン注入後5日間はレジオネラ属菌が未検出であり、このことから1回のオゾン注入によるレジオネラ属菌に対する抑制効果は数日間有効であることが判る。 Next, changes in the number of Legionella spp. (CFU/100 mL) before and after ozone injection at point C (filtered water) and point D (bath water) are shown in FIG. In the experiment of FIG. 5, ozone was injected by the sterilizer 80 (ozone injection rate: 0.87 mg/L with respect to the ozone injection pipe 50) on the 7th day from the start of measurement for 3 hours. From FIG. 5, Legionella spp. was not detected for 5 days after ozone injection, which indicates that the suppression effect on Legionella spp. by one ozone injection is effective for several days.

次に、本考案に係る殺菌装置80及び温浴設備100の動作を説明する。尚、ここではオゾン注入配管50が湯配管20に対し並列に接続した例を説明する。先ず、温浴設備100の浴槽10には所定の温度の湯水が所定量貯留されている。尚、浴槽10の水量が減少した場合には、給水配管16から適宜、補水が行われる。また、温浴設備100の入浴可能時間中は湯配管20のポンプ手段22は基本的に常時動作して、浴槽10内の湯水は吸水口12から随時、湯配管20内に取り込まれ、ヘアキャッチャ24に通水される。そして、ヘアキャッチャ24にて毛髪等の比較的大きなゴミが捕集、除去される。 Next, the operation of the sterilizer 80 and the hot bath facility 100 according to the present invention will be described. Here, an example in which the ozone injection pipe 50 is connected in parallel to the hot water pipe 20 will be described. First, a predetermined amount of hot and cold water having a predetermined temperature is stored in the bathtub 10 of the warm bath facility 100. In addition, when the amount of water in the bathtub 10 is reduced, water is appropriately replenished from the water supply pipe 16. Further, during the bathing time of the warm bath facility 100, the pump means 22 of the hot water pipe 20 basically operates at all times, and hot water in the bathtub 10 is taken into the hot water pipe 20 from the water intake 12 at any time, and the hair catcher 24 Is passed to. Then, the hair catcher 24 collects and removes relatively large dust such as hair.

尚、入浴可能時間中は本考案に係る殺菌装置80は動作せず、よって、流量調整弁36aは基本的に全開状態、流量調整弁36b、36cは全閉状態とされる。これにより、ヘアキャッチャ24を通過した湯水は湯配管20をそのまま流下して濾過器28に送水され、濾過器28内に充填した濾材によって濾過される。これにより、ヘアキャッチャ24では捕集できなかった細かな夾雑物が捕集、除去される。次に、濾過器28を通過した湯水は加温手段29に送水され適宜加温された後、吐出口14から浴槽10内に還流する。 During the bathing time, the sterilizer 80 according to the present invention does not operate, and therefore the flow rate adjusting valve 36a is basically fully opened and the flow rate adjusting valves 36b and 36c are fully closed. As a result, the hot and cold water that has passed through the hair catcher 24 flows down through the hot water pipe 20 as it is to the filter 28, and is filtered by the filter medium filled in the filter 28. As a result, fine contaminants that could not be collected by the hair catcher 24 are collected and removed. Next, the hot and cold water that has passed through the filter 28 is sent to the warming means 29 and heated appropriately, and then flows back from the discharge port 14 into the bath 10.

また、温浴設備100の濾過器28は定期的に逆洗が行われる。この逆洗は五方弁28aを用いて濾過器28の下流側から湯水を通水し、濾材間に堆積した夾雑物を排水配管28bから湯水ごと外部へ排出する。この逆洗動作により濾材間に堆積した夾雑物は除去され、濾過器28の濾過能力は回復する。尚、この逆洗動作時にも殺菌装置80は動作しない。 Further, the filter 28 of the warm bath facility 100 is regularly backwashed. In this backwash, hot water is passed from the downstream side of the filter 28 using the five-way valve 28a, and the contaminants accumulated between the filter media are discharged to the outside through the drainage pipe 28b. By this backwashing operation, contaminants accumulated between the filter media are removed, and the filtering ability of the filter 28 is restored. The sterilizer 80 does not operate during this backwashing operation.

次に、本考案に係る殺菌装置80の動作を説明する。先ず、殺菌装置80のオゾン発生装置32が可搬型の場合、殺菌を行う湯配管20のオゾン注入配管50の近傍にオゾン発生装置32を移動する。そして、オゾン発生装置32と気液混合部40とをオゾン供給管34により接続する。次に、ポンプ手段22を動作させるとともに、流量調整弁36a〜36cを自動もしくは手動にて調整し、オゾン注入配管50への湯水の分水量を予め設定された適切な流量とする。 Next, the operation of the sterilizer 80 according to the present invention will be described. First, when the ozone generator 32 of the sterilizer 80 is portable, the ozone generator 32 is moved to the vicinity of the ozone injection pipe 50 of the hot water pipe 20 for sterilization. Then, the ozone generator 32 and the gas-liquid mixing section 40 are connected by the ozone supply pipe 34. Next, the pump means 22 is operated, and the flow rate adjusting valves 36a to 36c are automatically or manually adjusted so that the amount of hot and cold water supplied to the ozone injection pipe 50 becomes an appropriate preset flow rate.

次に、オゾン発生装置32を動作させる。これにより、オゾン発生装置32はオゾンを生成し、オゾン供給管34を通して気液混合部40に供給する。そして、気液混合部40がオリフィス型の気液混合器の場合には、オリフィス部での湯水の流速増加による吸引力によりオゾン供給管34から供給されたオゾンを気液混合部40内を流下する湯水に注入する。注入されたオゾンは湯水がアルカリ性(例えば、アルカリ性泉水)の場合には、加水分解によりヒドロキシルラジカル等に変化する。そして、レジオネラ属菌の一番の温床となる濾過器28に通水され、レジオネラ属菌及び一般細菌を殺菌する。この殺菌装置80によるオゾン注入は所定の時間(数十分〜数時間)継続して行われ、これにより、湯配管20本体と濾過器28を含む湯配管経路に対する殺菌処理が行われる。尚、使用後もしくは余剰なオゾンは排出配管26aを介して排オゾン処理装置26に排出され活性炭処理等の然るべき措置が施された後、適正に処分される。 Next, the ozone generator 32 is operated. Thereby, the ozone generator 32 generates ozone and supplies it to the gas-liquid mixing section 40 through the ozone supply pipe 34. When the gas-liquid mixing section 40 is an orifice-type gas-liquid mixer, the ozone supplied from the ozone supply pipe 34 flows down in the gas-liquid mixing section 40 by the suction force due to the increase in the flow velocity of the hot water in the orifice section. Pour into hot water. When hot water is alkaline (for example, alkaline spring water), the injected ozone is converted into hydroxyl radicals or the like by hydrolysis. Then, water is passed through the filter 28, which is the hottest bed of Legionella spp., to sterilize the Legionella spp. and general bacteria. The ozone injection by the sterilizer 80 is continuously performed for a predetermined time (several tens of minutes to several hours), whereby the sterilization process is performed on the hot water pipe path including the hot water pipe 20 main body and the filter 28. It should be noted that after use or excess ozone is discharged to the exhaust ozone treatment device 26 through the discharge pipe 26a and appropriate measures such as activated carbon treatment are applied, and then properly disposed.

尚、本考案に係る殺菌装置80によるオゾン注入は利用者が浴槽10を使用できない入浴時間外等に行う。また、図5に示すように殺菌装置80による殺菌効果は数日間有効であるため、殺菌装置80による殺菌は毎日行う必要はなく所定の間隔で行えば良い。中でも特に浴水の入れ替え時の直前に殺菌装置80による殺菌を行うことが最も好ましい。この構成では、オゾン注入により濾過器28及び湯配管経路内に対する殺菌が行われた後、その湯水は廃棄され、入浴用には使用されない。尚、殺菌装置80によるオゾン注入を行った後の浴槽水の溶存オゾン濃度は図2に示すように低濃度のため人体に悪影響を与える可能性は少ないが、浴水の入れ替えの直前にオゾン注入による殺菌処理を行い、その後、オゾンを注入した湯水を廃棄することで更なる安全性の向上を図ることができる。 The ozone injection by the sterilizer 80 according to the present invention is performed outside the bathing time when the user cannot use the bath 10. Further, as shown in FIG. 5, since the sterilizing effect of the sterilizing device 80 is effective for several days, sterilizing by the sterilizing device 80 does not have to be performed every day and may be performed at predetermined intervals. Above all, it is most preferable to perform the sterilization by the sterilizer 80 immediately before the replacement of the bath water. In this configuration, after sterilizing the inside of the filter 28 and the hot water piping path by ozone injection, the hot water is discarded and is not used for bathing. Although the dissolved ozone concentration in the bath water after the ozone injection by the sterilizer 80 is low as shown in FIG. 2, it is unlikely to adversely affect the human body. It is possible to further improve safety by performing sterilization treatment by, and then discarding hot water into which ozone is injected.

上記のようにして、予め設定された所定の時間、オゾンの注入が行われるとオゾン発生装置32は自動もしくは手動にて停止される。また、流量調整弁36aを全開状態、流量調整弁36b、36cを全閉状態とし、オゾン注入配管50への通水を停止する。次に、オゾン供給管34を外し、オゾン発生装置32と気液混合部40とを分離する。そして、オゾン発生装置32は次のオゾン注入時まで待機する。尚、浴水の入れ替え時の直前にオゾン注入を行った場合には、浴槽10内の湯水を全て排出した後、新たな湯水を給水配管16から供給し、浴槽10に所定の温度の湯水を所定量貯留する。 As described above, when ozone is injected for a predetermined time set in advance, the ozone generator 32 is automatically or manually stopped. Further, the flow rate adjusting valve 36a is fully opened and the flow rate adjusting valves 36b and 36c are fully closed to stop the water flow to the ozone injection pipe 50. Next, the ozone supply pipe 34 is removed, and the ozone generator 32 and the gas-liquid mixing section 40 are separated. Then, the ozone generator 32 waits until the next ozone injection. When ozone is injected immediately before the bath water is replaced, the hot water in the bathtub 10 is completely discharged, and then new hot water is supplied from the water supply pipe 16 to the hot water at a predetermined temperature. Store a predetermined amount.

以上のように、本考案に係る殺菌装置80は、オゾンを湯水に注入することで濾過器及び湯配管経路内の殺菌を行う。特に、注入する湯水がアルカリ性の場合には、注入したオゾンが酸化作用の高いヒドロキシルラジカルに変化するため極めて優れた殺菌能力を発揮する。これにより、アルカリ性の温浴設備100に対する殺菌を安全かつ低コストで行う事ができる。 As described above, the sterilizer 80 according to the present invention injects ozone into hot water to sterilize the inside of the filter and the hot water pipe path. In particular, when the hot water to be injected is alkaline, the injected ozone changes into hydroxyl radicals having a high oxidative action, so that an extremely excellent sterilizing ability is exhibited. Accordingly, the sterilization of the alkaline hot bath facility 100 can be performed safely and at low cost.

また、オゾン注入配管50を湯配管20から分岐して並列に設ける構成では、殺菌装置80を比較的軽微な改造により既存の温浴設備100に設置することが可能となる。さらに、複数の浴槽10と湯配管20とを有する温浴施設では、オゾン発生装置32に移動可能な可搬型のものを用い、一台のオゾン発生装置32を各湯配管20で使い回すように構成することで設備コストの更なる低減を図ることができる。 Further, in the configuration in which the ozone injection pipe 50 is branched from the hot water pipe 20 and provided in parallel, the sterilizer 80 can be installed in the existing hot bath facility 100 by a relatively minor modification. Further, in a warm bath facility having a plurality of bathtubs 10 and hot water pipes 20, a portable portable ozone generator 32 is used, and one ozone generator 32 is reused in each hot water pipe 20. By doing so, the equipment cost can be further reduced.

尚、本例で示した温浴設備100、殺菌装置80、気液混合部40、オゾン発生装置32等の各部の構成、機構、動作、配管経路、及び、オゾンの供給方法、注入方法等は一例であるから、特に本例に限定される訳ではなく、本考案は本考案の要旨を逸脱しない範囲で変更して実施することが可能である。 It should be noted that the configuration, mechanism, operation, piping route, ozone supply method, injection method, etc. of each part such as the hot bath equipment 100, the sterilizer 80, the gas-liquid mixing section 40, the ozone generator 32, etc. shown in this example are examples. Therefore, the present invention is not particularly limited to this example, and the present invention can be modified and implemented without departing from the scope of the present invention.

20 湯配管
28 濾過器
32 オゾン発生装置
34 オゾン供給管
40 気液混合部
50 オゾン注入配管
80 殺菌装置
100 温浴設備
20 hot water piping
28 Filter
32 Ozone generator
34 Ozone supply pipe
40 Gas-liquid mixing section
50 Ozone injection pipe
80 Sterilizer
100 hot bath equipment

Claims (4)

オゾンを発生するオゾン発生装置と、温浴設備の湯配管に設けられたオゾン注入配管と、前記オゾン注入配管に設置され前記オゾン発生装置で生成したオゾンを注入する気液混合部と、前記気液混合部に前記オゾン発生装置で生成したオゾンを供給するオゾン供給管と、を有し、前記オゾン注入配管が前記湯配管中を流下する湯水にオゾンを注入し、濾過器及び湯配管経路内を殺菌することを特徴とする殺菌装置。 An ozone generator that generates ozone, an ozone injection pipe provided in a hot water pipe of a hot bath facility, a gas-liquid mixing unit that is installed in the ozone injection pipe and injects ozone generated by the ozone generator, and the gas liquid An ozone supply pipe for supplying ozone generated by the ozone generator to the mixing unit, and the ozone injection pipe injects ozone into hot water flowing down in the hot water pipe, Sterilization device characterized by sterilization. 溶存オゾン濃度が湯水に対して0.1mg/L〜1.4mg/Lであることを特徴とする請求項1記載の殺菌装置。 The sterilizer according to claim 1, wherein the dissolved ozone concentration is 0.1 mg/L to 1.4 mg/L with respect to hot water. 温浴設備の湯水がアルカリ性であり、前記アルカリ性の湯水に対しオゾンを注入することで前記オゾンを加水分解させてヒドロキシルラジカルを生成し、前記ヒドロキシルラジカルによって濾過器及び湯配管経路内を殺菌することを特徴とする請求項1または請求項2に記載の殺菌装置。 The hot water of the hot bath facility is alkaline, and by injecting ozone into the alkaline hot water, the ozone is hydrolyzed to generate hydroxyl radicals, and the hydroxyl radicals sterilize the inside of the filter and the hot water pipe route. The sterilizer according to claim 1 or 2, which is characterized. オゾン供給管が気液混合部もしくはオゾン発生装置に対して着脱が可能であり、
さらに前記オゾン発生装置が移動可能な可搬型のオゾン発生装置であることを特徴とする請求項1乃至請求項3のいずれかに記載の殺菌装置。
The ozone supply pipe can be attached to and detached from the gas-liquid mixing section or the ozone generator.
Further, the sterilizer according to any one of claims 1 to 3, wherein the ozone generator is a portable ozone generator that is movable.
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