JP3834945B2 - Bathing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bathing apparatus for dissolving a gas in water.
[0002]
[Prior art]
A conventional shower apparatus of this kind (for example, Japanese Patent Application Laid-Open No. 7-222785) is shown in FIG.
[0003]
FIG. 8 is a schematic overall configuration diagram of the shower apparatus. Hot water is supplied to the dissolver 1 through a pipe, and after the carbon dioxide gas is dissolved, it is discharged in a shower form from a nozzle 2 having a large number of holes. Carbon dioxide gas is supplied from the cylinder 3 to the dissolver 1 through a pipe. A flow rate detector 4 is provided in the middle of the hot water pipe leading to the dissolver 1. When the hot water flows, the flow rate detector 4 detects this and is installed in the middle of the pipe from the cylinder 3 to the dissolver 1. A signal is sent to the on-off valve 5 to open the on-off valve 5.
[0004]
FIG. 9 is a sectional view of the dissolver 1, 6 is a container, 7 is a hollow fiber membrane, 8 is a potting agent, 9 is a hot water inlet, 10 is a carbon dioxide dissolved water outlet, and 11 is a carbon dioxide inlet. is there. Carbon dioxide gas permeates through the membrane from the outside of the hollow fiber membrane 7 and dissolves in the warm water introduced into the hollow fiber membrane 7 from the hot water inlet 9, and the hot water becomes a carbon dioxide aqueous solution and flows out of the dissolver 1 from the outlet 10. To do.
[0005]
In a state where hot water does not flow, the flow rate detector 4 sends a signal to the on-off valve 5 to close the on-off valve. The pressure reducing valve 12 has a function of reducing the pressure in the cylinder 3 to a predetermined pressure. The nozzle 2 had 30 to 300 pores having a diameter of 0.3 to 1 mm.
[0006]
[Problems to be solved by the invention]
However, in the conventional shower apparatus, although the hollow fiber membrane 7 of the dissolver 1 is made of resin, water becomes warm water before the dissolver 1 and the warm water passes through the hollow fiber membrane 7 in the dissolver 1. Or, since it stays in the hollow fiber membrane 7 after use, there is a possibility of promoting the deterioration of the resin. In particular, when using a hollow fiber membrane 7 made of polyolefin or polyester thermoplastic resin, there is a problem that it is difficult to use the hollow fiber membrane 7 for a long period of time. Furthermore, if hot water is supplied to the dissolver 1 due to erroneous operation or malfunction, the performance of the hollow fiber membrane 7 may not be maintained in the same manner.
[0007]
Further, even when carbonic acid-dissolved water supply is not required, since warm water passes through the hollow fiber membrane 7, the performance maintenance period of the hollow fiber membrane 7 is shortened, and maintenance such as replacement of the dissolver 1 is short. It may have become necessary. In particular, in the hollow fiber membrane 7 that transmits only carbon dioxide gas and does not transmit hot water, there is a problem that water leaks due to deterioration of the resin .
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a water supply pipe for supplying water, a hot water supply pipe for supplying hot water, a mixing valve for adjusting a mixing ratio of hot water from the water supply pipe and the hot water supply pipe, and the mixing A gas dissolving means having a thermoplastic hollow fiber membrane for dissolving a gas in water ; a gas supply means for supplying gas to the gas dissolving means; and bypassing the gas dissolving means. A bypass flow path formed in the water supply pipe and a gas dissolving means side, or a switching valve for switching the flow direction of water on the bypass flow path side, and supplying a gas from the gas supply means to the gas dissolving means; The switching of the switching valve is linked, and when water is flowing through the bypass channel, the gas supply to the gas dissolving means is stopped.
[0009]
Therefore, warm water does not pass through the gas dissolving means, deterioration of the gas dissolving means due to heat can be suppressed, and durability can be improved. Moreover, since gas is melt | dissolved in water with low temperature, the solubility of gas is high and can improve the melt | dissolution efficiency of gas in water.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The bathing apparatus of the present invention includes a water supply pipe for supplying water, a hot water supply pipe for supplying hot water, a mixing valve for adjusting a mixing ratio of hot water from the water supply pipe and the hot water supply pipe, and an upstream side of the mixing valve. A gas dissolving means provided in a water supply pipe and having a thermoplastic hollow fiber membrane for dissolving gas in water, a gas supply means for supplying gas to the gas dissolving means, and a water supply pipe so as to bypass the gas dissolving means And a switching valve for switching the flow direction of water on the gas dissolving means side or the bypass flow path side, and supplying the gas from the gas supplying means to the gas dissolving means and switching the switching valve. And the gas supply to the gas dissolving means is set to stop when water is flowing in the bypass flow path.
[0011]
Therefore, since warm water does not pass through the gas dissolving means, it is possible to improve durability by suppressing deterioration due to heat of the gas dissolving means, and furthermore, since the gas is dissolved in water having a low temperature, the solubility of the gas is high, and The dissolution efficiency of gas can be improved.
[0012]
And by providing a bypass channel, it is possible to prevent only the minimum amount of water from flowing through the gas dissolving means in order to dissolve the gas, thus greatly extending the period until the performance of the gas dissolving means is degraded due to the flow of water. In addition, since a pressure loss in the gas dissolving means can be minimized, a sufficient flow rate can be secured.
[0013]
In particular, if carbon dioxide gas whose solubility varies greatly with temperature and easily volatilizes as a gas is used, the dissolution efficiency is greatly improved.
[0014]
Desirably, a pressure control valve for adjusting the supply water pressure is provided in the water supply pipe upstream of the gas dissolving means. In this way, high water pressure is not applied to the gas dissolving means, and the durability is further improved.
[0015]
In addition, providing a flow rate control valve for adjusting the supply flow rate in the water supply pipe upstream of the gas dissolving means is also useful for improving the durability performance.
[0016]
Furthermore, if an on-off valve is provided on the downstream side of the gas dissolving means and on the upstream side of the joining portion of the water supply pipe and the bypass flow path, the water pressure can be reduced by closing the on-off valve when water does not pass through the gas dissolving means. Does not act, and the load on the gas dissolving means can be reduced. In addition, since the front and back of the gas dissolving means are sealed and filled with water even when not in use, the inside of the water supply pipe is dried and scales and the like do not adhere to the gas dissolving means.
[0017]
【Example】
Example 1
A first embodiment of the present invention will be described below with reference to FIGS.
[0018]
FIG. 1 is a block diagram of a bathing apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of a gas dissolving means. In FIG. 1, 21 is a water supply pipe to which water is supplied, 22 is a hot water supply pipe to which hot water is supplied from a water heater 23, and hot water is supplied to the mixing valve 24 from each. In the middle of the water supply pipe 21, gas dissolving means 26 for dissolving carbon dioxide gas supplied from the carbon dioxide gas cylinder 25 in water is provided.
[0019]
Between the carbon dioxide gas cylinder 25 and the gas dissolving means 26, a gas pressure adjusting means 27 for adjusting the carbon dioxide supply pressure from the carbon dioxide gas cylinder 25, and the dissolution of the carbon dioxide gas in the water by opening and closing are controlled. A gas on-off valve 28 that suppresses the backflow to the is provided. A pressure reducing valve 29 that is a pressure adjusting valve is provided upstream of the gas dissolving means 26 of the water supply pipe 21 so that the water pressure in the gas dissolving means 26 does not exceed a predetermined pressure.
[0020]
FIG. 2 is a cross-sectional view of the gas dissolving means 26. The container 30 is provided with a carbon dioxide supply port 31 to which carbon dioxide gas is supplied, a water inlet 32 to which water is supplied, and a water outlet 33 from which water flows out. ing. 34 is a bundle of thermoplastic resin hollow fiber membranes molded at both ends by a mold part 35. The mold part 35 is bonded to the container 30, and a gas chamber 36 connected to the carbon dioxide supply port 31; A carbon dioxide gas dissolution chamber 37 is formed as a path. The hollow fiber membrane 34 permeates carbon dioxide but does not permeate water, and the carbon dioxide gas permeates the hollow fiber membrane 34 according to the supplied pressure and is dissolved in water.
[0021]
The water inlet 32 and the water outlet 33 are provided at both ends thereof so that water is used as a passage in the carbon dioxide gas dissolution chamber 37, and a water flow is formed along the hollow fiber membrane 34 through which the carbon dioxide gas is permeated so as to increase the dissolution efficiency. It has become a structure.
[0022]
The mixing valve 24 adjusts the mixing ratio so that the supplied hot and cold water has a set temperature. The hot water adjusted to the set temperature by the mixing valve 24 is supplied to a control valve 40 that adjusts the flow rate, switches between the hand shower 38 and the currant 39, and closes. The hot water can be supplied into the bathtub 41 from the currant 39.
[0023]
With the above configuration, the operation and operation of the present embodiment will be described.
[0024]
When the user wants to supply hot water in which carbon dioxide gas is dissolved from the hand shower 38 or the currant 39, first the temperature of the mixing valve 34 is set, and then the control valve 40 is opened. In the water supply pipe 21, the water pressure becomes a predetermined pressure or less by the pressure reducing valve 29 and is supplied from the water inlet 32 of the gas dissolving means 26 to the carbon dioxide dissolving chamber 37.
[0025]
At this time, in order to supply the carbon dioxide gas, the gas on-off valve 28 is opened, and the carbon dioxide gas whose pressure is adjusted by the gas pressure adjusting means 27 from the carbon dioxide gas cylinder 25 is supplied from the carbon dioxide supply port 31 of the gas dissolving means 26 to the gas chamber 36. Supplied to. Since the open end of the hollow fiber membrane 34 opens into the gas chamber 36, the pressure of the carbon dioxide gas to which the hollow fiber membrane 34 is also supplied is applied.
[0026]
Since the mold part 35 and the container 30 are bonded, and the hollow fiber membrane 34 is configured to ensure that the gas does not leak from the carbon dioxide gas dissolution chamber 37 by the mold part 35, the hollow fiber membrane 34 penetrates the carbon dioxide gas from the inside. Carbon dioxide is dissolved in water. Since the amount of carbon dioxide dissolved greatly depends on the contact area with water, the hollow fiber membrane 34 is formed into a thin and numerous bundle, and the water flows along the surface.
[0027]
Here, since the water pressure is less than or equal to a predetermined value, the pressure applied to the hollow fiber membrane 34 is less than or equal to a predetermined value, and the stress applied to the hollow fiber membrane 34 can be kept below a certain value. A hollow fiber membrane can be used, the dissolution efficiency can be improved, the load on the hollow fiber membrane 34 can be reduced, and the pressure loss of carbon dioxide gas that permeates the hollow fiber membrane 34 can also be suppressed. In addition, since the water pressure can be adjusted, it is not necessary to increase the pressure of carbon dioxide gas more than necessary, and it is possible to ensure a safe working pressure, as well as ensuring a differential pressure between carbon dioxide gas and water, so that carbon dioxide gas is easily dissolved. .
[0028]
Furthermore, since only water flows into the carbon dioxide dissolution chamber 37, the supply water temperature can be suppressed low, deterioration of the hollow fiber membrane 34, which is generally formed of a thermoplastic resin, due to heat can be suppressed, and durability performance can be improved. .
[0029]
Further, since carbon dioxide is dissolved in water, as shown in FIG. 3, this is an effective dissolution method for carbon dioxide that is more easily dissolved as the water temperature is lower.
[0030]
The water in which the carbon dioxide gas is dissolved by the gas dissolving means 26 is mixed with the hot water supplied from the hot water heater 23 through the hot water supply pipe 22 so as to have a temperature set by the mixing valve 24. The carbon dioxide gas concentration at this time can be expressed by the following formula 1.
[0031]
Hot water carbon dioxide concentration = water carbon dioxide concentration x water flow rate / (water flow rate + hot water flow rate) (Equation 1)
Here, if the water temperature is 20 ° C., the hot water temperature is 75 ° C., and the set temperature is 40 ° C., the mixing ratio of water and hot water is 1.75: 1. At this time, since the saturation concentration of carbon dioxide at 40 ° C. is about 1000 ppm, the carbon dioxide concentration of water may be set to 1600 ppm.
[0032]
Since the saturated carbon dioxide concentration of water at 20 ° C. is about 1750 ppm, carbon dioxide gas must be saturated if it is hot water at 40 ° C., but if it is 20 ° C. water, 90% of the saturated dissolved amount of carbon dioxide gas is reduced. It may be dissolved, and it can be said that it is advantageous to dissolve at 20 ° C.
[0033]
At this time, the higher the flow rate of water, the easier it is to dissolve the carbon dioxide gas, so the hot water temperature supplied by the hot water supply device 23 is preferably higher (50 ° C. or higher, preferably 60 ° C. or higher). Here, the dissolution of carbon dioxide gas is compared under saturation conditions, but it is not necessary to be saturated as long as the carbon dioxide concentration is between 50 and 1000 ppm, which has a blood circulation promoting effect on the human body.
[0034]
The hot water in which the carbon dioxide mixed at the set temperature by the mixing valve 24 is dissolved is adjusted in flow rate by the control valve 40 and discharged from the hand shower 38 or currant 39 selected by the user. Hot water in which carbon dioxide gas is dissolved has the same effect as that found in carbonated springs, that is, blood vessels are dilated by carbon dioxide, so that blood circulation is promoted, and various effects such as recovery from fatigue and coldness can be expected.
[0035]
In this embodiment, in order to reduce the pressure loss in the gas dissolving means 26, water does not pass inside the hollow fiber membrane 34 which is thin and has a large pressure loss, but water passes outside the hollow fiber membrane 34 and is hollow. Although carbon dioxide gas permeates from the inside of the thread membrane 34 and dissolves in water, water passes through the inside of the hollow fiber membrane 34, and carbon dioxide gas permeates from the outside of the hollow fiber membrane 34 and dissolves in water. The same effect can be obtained.
[0036]
The same effect can be obtained by using the pressure reducing valve 29 as a flow rate adjusting valve or a constant flow rate valve.
[0037]
(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIG.
[0038]
FIG. 4 is a block diagram of the bathing apparatus according to the second embodiment of the present invention. Only the points different from the first embodiment will be described, and the others will be denoted by the same reference numerals and omitted. In FIG. 4, reference numeral 42 denotes a switching valve provided in the water supply pipe 21, which switches between the gas dissolving means 26 and the bypass flow path 43 provided so that water does not pass through the gas dissolving means 26. ing.
[0039]
A control unit 44 controls the gas on-off valve 28 and the switching valve 42 by a signal from the operation unit 45 that selects whether or not the user dissolves carbonic acid in water. Upon receiving a carbonic acid dissolution signal from the operation unit 45, the controller 44 opens the gas on-off valve 28 and simultaneously opens the switching valve 42 toward the gas dissolving means 26 to supply carbonic acid to water. When there is no signal from the operation unit 45, the control unit 44 closes the gas on-off valve 28 and opens the switching valve 42 on the bypass flow path 43 side, so that the water supplied to the mixing valve 24 causes the gas dissolving means 26 to flow. I try not to pass.
[0040]
Accordingly, when carbon dioxide gas is not supplied, water does not pass through the gas dissolving means 26, so that the flow rate of water passing through the hollow fiber membrane 34 can be greatly reduced, and the hollow fiber membrane is greatly influenced by the flow rate of water. The durability performance of 34 can be greatly improved. Further, when carbon dioxide gas is not supplied, water passes through the bypass passage 43, so that pressure loss can be suppressed to a minimum, and it can be used in the same manner as a normal water faucet or the like.
[0041]
Furthermore, since the user can reliably supply carbon dioxide simply by operating the operation unit 45, wasteful carbon dioxide is not used, and only carbon dioxide is accidentally supplied into the bathroom. There is no.
[0042]
In addition, when the control valve 40 is closed in a state where carbon dioxide gas is supplied or the like, the switching valve 42 automatically opens the bypass flow path 43 side when water is not supplied. In this case, water is supplied from the bypass channel 43, and water other than necessary is not passed through the hollow fiber membrane 34.
[0043]
Example 3
Embodiment 3 of the present invention will be described below with reference to FIGS.
[0044]
5 is a perspective view of a bathing apparatus according to a third embodiment of the present invention, FIG. 6 is a block diagram of the bathing apparatus, and FIG. 7 is a cross-sectional view of a gas dissolving means.
[0045]
In FIG. 5, a shower bath device 46 which is a bathing device is attached to a wall surface 49 facing a washing place 48 of a bathroom 47.
[0046]
In the shower bath device 46, 50 is a chair that is a seating means provided in a freely rotatable manner so that a user can sit down and bathe in hot water, and can be rotated and stored in the main body when not in use. It has become.
[0047]
Reference numeral 51 denotes a rotatable arm, which is set as shown in FIG. 5 when the user sits down and bathes in hot water, and can be rotated and stored in the direction of the wall surface 49 when not in use. When the shower bath device 46 is not used, the washing place 48 of the bathroom 47 can be used widely and a visual feeling of pressure is prevented.
[0048]
The arm 51 is provided with a spray nozzle 52 that sprays hot water in a symmetric manner in the left-right direction, and is arranged so that hot water can be sprayed from the tip to the legs, abdomen, and chest area. Also, the spray nozzle 52 is provided symmetrically on the cover 53 of the shower bath device 46, and is arranged so that hot water can be jetted around the back and the waist, respectively.
[0049]
The hot water flow path of the shower bath device 46 is as shown in FIG. 6, and only points different from the second embodiment will be described, and the others will be denoted by the same reference numerals and omitted. 54 is an on-off valve provided in the water supply pipe 21 on the downstream side of the gas dissolving means 55 and upstream of the joining part of the water supply pipe 21 and the bypass flow path 43, and is linked to the switching valve 42 by the control unit 56. It is designed to be opened and closed. When the operation unit 45 selects the mixing of carbonic acid, the control unit 56 opens the switching valve 42 toward the gas dissolving means 55 and controls the opening / closing valve 54 at the same time. When mixing of carbonic acid is stopped or the control valve 40 is closed by the operation unit, the switching valve 42 is opened to the bypass flow path 43 side, and at the same time, the on-off valve 54 is also closed.
[0050]
In particular, when the control valve 40 is closed, first, the switching valve 42 is opened to the bypass flow path 43 side, the control valve 40 is also closed, and then the control valve 40 is closed. The primary pressure of water at the time of closing 40 is not directly applied to the gas dissolving means 55.
[0051]
FIG. 7 is a cross-sectional view of the gas dissolving means 55. A porous body 57 (for example, a ceramic or resinous porous body) that is joined to the water supply pipe 21 so as not to leak water and forms a water flow path leaks water from the inside of the pipe. It has a large number of holes that allow only carbon dioxide gas supplied from the outside to pass through.
[0052]
The pores of the porous body 57 have a size of several angstroms to several tens of angstroms, and the permeated carbon dioxide gas is easily dissolved in water.
[0053]
With the above configuration, the operation and operation of the present embodiment will be described.
[0054]
When the operation unit 45 selects the mixing of carbonic acid, the control unit 56 opens the switching valve 42 toward the gas dissolving means 55 and controls the opening / closing valve 54 at the same time. When mixing of carbonic acid is stopped or the control valve 40 is closed by the operation unit, the switching valve 42 is opened to the bypass flow path 43 side, and at the same time, the on-off valve 54 is also closed.
[0055]
In particular, when the control valve 40 is closed, first, the switching valve 42 is opened to the bypass flow path 43 side, the control valve 40 is also closed, and then the control valve 40 is closed. Since the primary pressure of water at the time of closing 40 is not directly applied to the gas dissolving means 55, the pressure applied to the inside of the porous body 57 can be suppressed, and the durability of the porous body 57 can be improved. The required strength can be suppressed and the thickness can be reduced. In addition, the pressure loss of carbon dioxide gas can be reduced, and the cost can be reduced.
[0056]
In addition, since both ends of the gas dissolving means 55 are closed, water always exists in the porous body 57 and is not dried, and adhesion of scales and the like can be prevented.
[0057]
When a user sits in the shower bath and bathes in hot water with carbonated water from the spray nozzle 52, the whole body is wrapped in hot water in which carbon dioxide gas is dissolved. It can be carried out.
[0058]
Even when carbonic acid is not dissolved, the entire body is wrapped in mist-like warm water, so that a warm feeling as if bathing can be obtained.
[0059]
In the first to third embodiments, a bath apparatus having a shower is mainly described. However, a bath apparatus for supplying hot water into a bathtub, a hot water washing toilet seat for washing a local area, and a faucet for washing a normal hand and face. It is also possible to use for the above, and the application is not limited to this.
[0060]
As described above, the bathing apparatus described in the embodiments of the present invention has the following features.
[0061]
(1) A water supply pipe for supplying water, a hot water supply pipe for supplying hot water, a mixing valve for adjusting a mixing ratio of hot water from the water supply pipe and the hot water supply pipe, and water provided in a water supply pipe upstream of the mixing valve Since the hot water does not pass through the gas dissolving means, deterioration due to heat of the gas dissolving means can be suppressed, and durability can be improved. In particular, it is effective for a hollow fiber membrane made of a thermoplastic resin that is significantly deteriorated by heat.
[0062]
(2) Carbon dioxide gas is used as the gas to be dissolved, and the carbon dioxide gas, whose solubility changes greatly with temperature and easily volatilizes, is dissolved in water, so that the dissolution efficiency is greatly improved. Therefore, even if carbon dioxide is not dissolved in water in a saturated state, hot water in which carbon dioxide is almost saturated can be obtained by mixing carbon dioxide-dissolved water and hot water.
[0063]
(3) A pressure control valve for adjusting the supply water pressure is provided in the water supply pipe upstream of the gas dissolving means, and it is supplied at a high pressure unlike hot water supplied under reduced pressure via a water heater or an electric water heater. Since the pressure regulating valve for adjusting the water pressure is provided upstream of the gas dissolving means of the water supply pipe, no high water pressure is applied to the gas dissolving means, the pressure applied to the gas dissolving means can be reduced, and the durability performance can be improved. In particular, if the resin gas dissolving means such as a hollow fiber membrane is used, the effect is great.
[0064]
(4) A flow control valve for adjusting the supply flow rate is provided in the water supply pipe upstream of the gas dissolving means, and since a flow rate higher than a predetermined value does not flow through the gas dissolving means, the load on the gas dissolving means is reduced, Durability can be improved.
[0065]
(5) A bypass flow path is provided in the water supply pipe so that water is supplied to the mixing valve without going through the gas dissolving means, and only a minimum amount of water is allowed to flow through the gas dissolving means in order to dissolve the gas. Therefore, the period until the performance of the gas dissolving means is lowered due to the flow of water can be greatly extended, and the pressure loss in the gas dissolving means can be minimized, so that a sufficient flow rate can be secured.
[0066]
(6) A switching valve for the water supply pipe and the bypass flow path is provided, and water is allowed to flow through the gas dissolution means of the water supply pipe as required by the switching valve, so that the amount of water passing through the gas dissolution means can be suppressed, The durability can be further improved, and hot water can be supplied with a pressure loss that is the same as that of a normal bathing device when the gas dissolving means is not used.
[0067]
(7) When the gas is not supplied from the gas dissolving means, a control unit that opens the switching valve to the bypass flow path side is provided, and water passes through the gas dissolving means and the gas is supplied only when the gas is supplied. If not, the control unit reliably controls the water to pass through the bypass flow path, so that the amount of water passing through the gas dissolving means can be minimized.
[0068]
(8) An on-off valve is provided on the downstream side of the gas dissolving means and on the upstream side of the joining portion of the water supply pipe and the bypass flow path, and when the on-off valve is closed when water does not pass through the gas dissolving means, Since water pressure does not act, the load on the gas dissolving means can be reduced. Further, even when not in use, the front and back of the gas dissolving means are sealed and filled with water, so that the inside of the water supply pipe does not dry and scales or the like do not adhere to the gas dissolving means.
[0069]
【The invention's effect】
As described above, according to the bathing apparatus of the present invention, since hot water does not pass through the gas dissolving means, it is possible to suppress deterioration due to heat of the gas dissolving means and greatly enhance its durability. This is effective for gas dissolving means using a remarkable thermoplastic hollow fiber membrane.
[Brief description of the drawings]
FIG. 1 is a block diagram of a bathing apparatus in Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of gas dissolving means of the bathing apparatus. FIG. 3 is a characteristic diagram of water temperature and carbonic acid dissolution amount. Block diagram of the bathing apparatus in Example 2 [Fig. 5] Perspective view of the bathing apparatus of Example 3 of the present invention [Fig. 6] Block diagram of the bathing apparatus [Fig. 7] Cross-sectional view of the gas dissolving means of the bathing apparatus [Fig. 8] Block diagram of a conventional bathing device [Fig. 9] Cross-sectional view of gas dissolving means of the bathing device [Explanation of symbols]
21 Water Supply Pipe 22 Hot Water Supply Pipe 24 Mixing Valve 26 Gas Dissolving Means 29 Pressure Reducing Valve (Pressure Control Valve)
34 Hollow fiber membrane 42 Switching valve 43 Bypass flow path 44 Control unit 46 Shower bath device (bathing device)
54 On-off valve 55 Gas dissolving means 56 Control unit 57 Porous body

Claims (4)

A water supply pipe for supplying water, a hot water supply pipe for supplying hot water, a mixing valve for adjusting a mixing ratio of hot water from the water supply pipe and the hot water supply pipe, and a water supply pipe upstream of the mixing valve, A gas dissolving means having a thermoplastic hollow fiber membrane that dissolves gas in the gas, a gas supply means for supplying gas to the gas dissolving means, and a bypass channel formed in the water supply pipe so as to bypass the gas dissolving means And a switching valve for switching the flow direction of water on the gas dissolving means side or the bypass flow path side, and by connecting the gas supply from the gas supply means to the gas dissolving means and the switching of the switching valve, Bathing device set to stop the gas supply to the gas dissolving means when water is flowing in the water .   The bathing apparatus according to claim 1, wherein the gas to be dissolved is carbon dioxide.   The bathing apparatus according to claim 1, wherein a pressure control valve for adjusting the supply water pressure is provided in a water supply pipe upstream of the gas dissolving means. The bathing apparatus according to claim 1, wherein an on-off valve is provided on the downstream side of the gas dissolving means and on the upstream side of the joining portion of the water supply pipe and the bypass channel .

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