JPH03155818A - Circulating type bath - Google Patents

Abstract

PURPOSE:To use water in a clean state for a long period by providing a treatment tank provided between a branch duct line and an ejector, and an electrolytic cell formed by superposing an anode side electrode and a cathode side electrode on both faces of a solid electrolytic film so that at least the anode side electrode of the solid electrolytic film comes into contact with water flowing into the treatment tank. CONSTITUTION:A treatment tank 10 is provided with an electrolytic cell 20 formed by superposing an anode side electrode 22 and a cathode side electrode 23 consisting of a porous anticorrosion metal on both faces of a solid electrolytic film 21 so that at least the anode side electrode 22 of its solid electrolytic film 21 comes into contact with water flowing into the treatment tank 10. The electrolytic cell 20 uses a fluorine compound cation exchange film as the solid electrolytic film 21. Also, as for the anode side electrode 22, it is known that a lead dioxide plate, etc., having many through-holes are excellent in the ozone generation efficiency, and also, as for the cathode side electrode 23, an anticorrosion metallic plate having many through-holes 23a is used. That is, the solid electrolytic film 21 is inserted and held by the anode side electrode 22 and the cathode side electrode 23 so that the contact surface of the anode side electrode 22 of the solid electrolytic film 1 comes into contact with water W flowing into the treatment tank 10.

Description

[Detailed description of the invention] Field of use in RA industry” The present invention relates to a circulating bath.

rPrior art j Conventionally, water in a bathtub is led from the drain to the outside of the bathtub through a circulation pipe, a pump and a filter are interposed in the middle of the circulation pipe, and the tip of the circulation pipe is connected to the bathtub. Various circulating baths have been proposed that are connected to the water inlet of the bathtub and filter the water for circulation.

Additionally, since the above-mentioned filter filtration cannot reliably capture microorganisms in the water, it has also been proposed to install an ultraviolet irradiation lamp in the middle of the circulation pipe to ozone the oxygen dissolved in the water to sterilize it. ``Problems to be solved by the invention'' However, the circulation bath equipped with the above-mentioned ultraviolet irradiation lamp,
Ultraviolet irradiation lamps require a power supply of more than t oov, and even if this power supply is waterproof, the danger cannot be completely eliminated because it is used near water, and UV irradiation lamps have short lifespans and cannot be used for irradiation. The windows also had the disadvantage of requiring time and effort to maintain, as they had to be cleaned regularly.

In addition, since UV irradiation lamps are usually used in contact with the outside air, they also ozone the oxygen in the air, and also oxidize nitrogen in the air to generate nitrogen oxide, so it is difficult to deal with harmful gases. It was necessary.

Means for Solving Problems J In accordance with the above-mentioned object, the structure of the present invention, the gist of which is defined in the above-mentioned claims, is to circulate the water in the bathtub 1 from the drain port 1a in order to solve the above-mentioned problems. A pump 3 and a filter 4 are interposed in the middle of the circulation line 2, and the tip of the circulation line 2 is connected to the water inlet 1 of the bathtub 1.
In the circulation type bath connected to the filter 4, a branch pipe 11a is branched to the downstream side of the outlet 4b of the filter 4 of the circulation pipe 2, and the tip of the branch pipe 11a is connected to the flow of the processing tank 10. A wooden tube is connected to the inlet 10a, and further connects the outlet 1°b of the processing tank 1o and the mixed fluid inlet 5c of the ejector 5, which is disposed upstream of the inlet 4a of the filter 4 of the circulation pipe 2. The treatment tank 10 is provided with an anode side electrode 22 and a cathode side electrode 23 made of a porous corrosion-resistant metal on both sides of the solid electrolyte membrane 21.
At least the anode side electrode 22 of the solid electrolyte membrane 21 is treated 41!10.
The anode side electrode 8i22 and the cathode side electrode 23 are connected to the output end of the DC power supply device 30, respectively. It is something that

r Effect 1 Therefore, the circulation type bath of the present invention has the same effect as the conventional bath that the water in the bathtub i is filtered by the filter 4 when it circulates through the circulation pipe 2.

In the circulation bath of the present invention, a portion of the filtered water flowing out of the filter 4 is guided into the treatment tank 10 through the branch pipe 11a, where it is electrolyzed and ozone is supplied to the water.

Then, the water supplied with ozone returns to the circulation pipe 2 from the ejector 5 located upstream of the inlet 4a of the filter 4, and is sterilized and oxidized by the strong oxidizing power of ozone.

Normally, the filter 4 collects organic matter discharged or peeled off from bathers, and bacteria breed using this organic matter as a nutrient source, and the filter becomes clogged in a short period of time with a slimy group of microorganisms called slime. However, in the case of the present invention, since ozone is supplied to the upstream side of the filter 4, it has the effect of oxidizing organic substances and bacteria that have adhered or are about to adhere, thereby preserving the life of the filter 4.

In addition, in the treatment tank 10 of the present invention, water is electrolyzed and ozone is generated, but it goes without saying that oxygen is also generated at the same time. The oxygen immediately generated by this electrolysis is called active oxygen, and is known to have strong oxidizing power, unlike oxygen in the air or oxygen in an oxygen cylinder. Therefore, like ozone, this active oxygen also exhibits the effect of decomposing bacteria and organic matter.

Embodiment 1 Next, an embodiment of the present invention will be described below with reference to the accompanying drawings.

Free, 1 is the bathtub, W is the water in the bathtub 1, bath 4!
The water W in the bathtub 1 is passed through the circulation pipe 2 from the drain 1a to the bathtub 1.
A pump 3 and a filter 4 are interposed in the middle of this circulation pipe 2, and the tip of the circulation pipe 2 is roughly connected to the bathtub 1.
It is connected to the water inlet 1b of the bathtub 1, which is the same as before.
The water W inside is led out through the circulation pipe 2 from the drain port 1a by the pump 3, filtered by the filter 4, and then passed through the water inlet 1b.
It circulates from the bathtub 1 back to the bathtub 1. It should be noted that, as in the conventional case, a heat exchanger a16 (gas burner or electric heater) may be disposed in the middle of the circulation pipe 2 as required.

Then, a branch pipe 11a is branched to a downstream part of the circulation pipe 2 from the discharge port 4b of the filter 4, and this branch pipe 1
The distal end of the ejector 5 is connected to the inlet 10a of the processing tank 10, and the ejector 5 is interposed between the outlet 10b of the processing tank 10 and the inlet 4a of the filter 4 of the circulation pipe 2. It communicates with the inlet 5c through a condensate pipe flb. The ejector 5 connects the tip opening of the condensate pipe fib to a region where the inner diameter of the circulation pipe 2 is locally narrowed, and allows the water W to flow through the circulation pipe 2 to remove the water from the condensate pipe ttb. A device that suctions W by a venturi action is used, and due to this suction force, a part of the water W flowing out from the filter 4 is diverted through a branch pipe 11a and sent to the processing tank 1.
0 and returns from the condensate pipe 11b to the portion upstream of the filter 4 of the circulation pipe 2.

In the treatment tank 10, an electrolytic cell 20 having an anode side electrode 22 made of a porous corrosion-resistant metal and a cathode side electrode 23 stacked on both sides of a solid electrolyte membrane 21 is installed. The anode side electrode 22 of the processing tank 1
It is arranged so as to be in contact with the water flowing into the tank.

The electrolysis cell 20 uses a fluorine-based cation exchanger txm as the solid electrolyte membrane 1. In addition, the anode side electrode 22
It is known that a lead dioxide plate having a large number of through holes 22a (a conductive porous plate laminated with a lead dioxide plate) has good ozone generation efficiency. A corrosion-resistant metal plate having a large number of through holes 23a is used.

That is, the solid electrolyte membrane 1 is sandwiched between the anode side electrode 22 and the cathode side electrode 23, and the contact surface of the anode side electrode 22 of the solid electrolyte It's Nishide. Note that the cathode side electrode 23 of the solid electrolyte membrane 1 may face the atmosphere (the treatment tank 10
A window is provided, this window is closed with a solid electrolyte membrane 1, and an anode side electrode 22 is stacked on the inner side of the processing tank 10 of the solid electrolyte membrane 1, and a cathode side electrode 23 is stacked on the outside side. ), but in the illustrated example, process 4
As shown in FIG. 2, 110 is made into a two-part container shape with an anode side container body 10 and a cathode side container body 10'', and an anode side container body 1.
A holding rib 16 for the anode side electrode 22 is provided inside the container body 10'', leaving a cavity 17 that communicates the inflow port 010a and the outflow port tab, and a hydrogen discharge port 10c is provided inside the cathode side container body 10''.
A pressing rib 16° is provided leaving a space 17° communicating with the holding rib 16°.

In addition, since hydrogen is generated on the cathode side electrode 23 side by electrolysis of the water W, this hydrogen is led from the empty space 17° through the hydrogen outlet 10c through the conduit 26 to the hydrogen decomposition catalyst 23.
7 and is decomposed and released into the atmosphere. Note that this hydrogen decomposition catalyst 27 may be omitted, and the tip of the conduit 26 may be guided to the heat exchanger 6 consisting of a gas burner, and the hydrogen generated together with the combustion gas may be combusted by the pilot burner.

The anode side electrode 22 and the cathode side electrode 23 are connected to the output end of the DC power supply device 30, respectively. This DC power supply 30 is of low voltage type (SV in this embodiment) and is designed so that a DC voltage is applied between the anode side electrode 22 and the cathode side electrode 23.

Effects of the Invention J Since the present invention is as described above, ozone generated by electrolysis in the treatment tank 10 is mixed into the circulating water W and sterilizes the water, compared to a system in which only filter filtration is performed. , it is possible to provide a circulating bath in which water can be used in a clean state for a long period of time.

In addition, a noteworthy effect of the present invention is that ozone is obtained by electrolyzing the water W, so no harmful substances such as nitrogen oxides are mixed into the water, and furthermore, unlike an ultraviolet lamp, nitrogen oxidation can be carried out indoors. It is possible to provide a circulating bath that does not dissipate substances, etc., and furthermore, this electrolysis is carried out by using an anode side electrode 22 and a cathode side electrode made of porous corrosion-resistant metal on both sides of the solid electrolyte membrane 21. Since the electrolytic cell 20 made by stacking 23 and 23 is used, the power supply voltage used is 5 to 20.
It is possible to provide a good and safe circulating bath with a DC voltage of 500 V.

Furthermore, since the present invention supplies ozone to the upstream side of the filter 4, the filter 4 is prevented from clogging.
It is possible to provide a circulating bath that can extend the life of the bath.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the circulating bath of the present invention, and Fig. 2 is a sectional view of the treatment tank section.
1a ~ Drain port 1b ~ Water inlet 2 ~ Circulation pipe
3~Pump 4~Filter 48~Inlet 4b~Discharge 0 5~Ejector 50~
Mixed fluid inlet 10 - processing tank 10a - inlet 10b - outlet 11a - branch pipe flb - wood pipe 20 - electrolysis cell 21 - solid electrolyte membrane
22 ~ Anode side electrode 23 ~ Cathode side electrode 30 ~ DC power supply O1 / /b 10"10' 0

Claims (1)

[Claims] The water W in the bathtub 1 is guided from the drain port 1a to the outside of the bathtub 1 through a circulation pipe 2, and a pump 3 and a filter 4 are interposed in the middle of the circulation pipe 2. In a circulating bath where the tip of the circulation pipe 2 is connected to the water inlet 1b of the bathtub 1, a branch pipe 11a is branched to a downstream part of the circulation pipe 2 from the outlet 4b of the filter 4, The tip of this branch pipe 11a is connected to the inlet 10a of the processing tank 10, and an ejector is further interposed between the outlet 10b of the processing tank 10 and a portion upstream of the inlet 4a of the filter 4 of the circulation pipe 2. The treatment tank 10 has an anode side electrode 22 and a cathode side electrode 23 made of porous corrosion-resistant metal on both sides of the solid electrolyte membrane 21.
The electrolytic cell 20 is arranged such that at least the anode side electrode 22 of the solid electrolyte membrane 21 is in contact with the water flowing into the treatment tank 10, and the anode side electrode 22 and the cathode side The circulation bath is characterized in that the electrodes 23 are respectively connected to the output ends of a DC power supply 30.