JP5611289B2 - Composite nozzle unit and bathtub system - Google Patents

Description

  The present invention relates to an air-dissolving liquid in which air dissolves (high-pressure air-dissolving liquid) or a composite nozzle unit that ejects high-pressure liquid into a bathtub, and a bathtub system including the composite nozzle unit.

As a technique for ejecting a fine bubble liquid or a high-pressure liquid into a bathtub, Patent Document 1 discloses a bathtub system including a jet nozzle, a fine bubble nozzle, an outlet, a circulation pump, a gas-liquid mixing tank, and the like.
In the bathtub system of Patent Document 1, when the circulation pump is driven, the circulation pump sucks the liquid (hot water, water) in the bathtub through the outlet and the circulation path and discharges the high-pressure liquid downstream of the circulation path. The high-pressure liquid discharged from the circulation pump is introduced into the jet nozzle through the circulation channel, and the jet nozzle ejects the high-pressure liquid into the bathtub. The high-pressure liquid discharged from the circulation pump is introduced into the gas-liquid mixing tank, and air is dissolved in the high-pressure liquid in the gas-liquid mixing tank to generate an air-dissolving liquid. The air-dissolved liquid is introduced into the fine bubble nozzle through the circulation path, and the fine bubble nozzle ejects the air-dissolved liquid into the bathtub and generates fine bubbles in the bathtub.

  However, in Patent Document 1, since the jet nozzle and the fine bubble nozzle are separately provided and separately installed in the bathtub, the number of installation steps increases.

JP 2002-330885 A

An object of the present invention is to provide a composite nozzle unit and a bathtub system that can reduce the number of man-hours for installing a fine bubble nozzle and a jet nozzle.
In the present invention, the unit main body has a fine bubble nozzle and a jet nozzle integrally. The nozzle switching valve closes one side of the fine bubble nozzle or the jet nozzle from the liquid introduction chamber and communicates the other side to the liquid introduction chamber. Thus, an object of the present invention is to provide a composite nozzle unit and a bathtub system that can reliably jet high-pressure liquid or air-dissolved liquid (fine bubbles) into the bathtub.

  According to a first aspect of the present invention, there is provided a liquid introduction chamber for introducing an air-dissolved liquid or a high-pressure liquid in which air is dissolved, a fine bubble nozzle for ejecting the air-dissolved liquid into a bathtub and generating fine bubbles, and the high-pressure liquid. A first nozzle opening / closing position that includes a jet nozzle that jets into the bathtub, closes the fine bubble nozzle and communicates the jet nozzle with the liquid introduction chamber; or closes the jet nozzle and introduces the fine bubble nozzle into the liquid A composite nozzle unit that switches to a second opening / closing position that communicates with a chamber, wherein the liquid introduction chamber, the fine bubble nozzle, and the jet nozzle are integrated, and a unit main body that is attached to the bathtub, and is disposed in the bathtub Operation handle, nozzle valve seat formed inside each nozzle and opening to the liquid introduction chamber, and switching valve body disposed in the liquid introduction chamber A nozzle switching valve, and the switching valve body is switched to the first opening / closing position or the second opening / closing position based on an operation of the operation handle, and the liquid introduction chamber is in the first opening / closing position. To the nozzle valve seat of the fine bubble nozzle, close the fine bubble nozzle from the liquid introduction chamber, and contact the nozzle valve seat of the jet nozzle from the liquid introduction chamber at the second opening / closing position. The present invention relates to a composite nozzle unit that closes the jet nozzle from the liquid introduction chamber.

  According to a second aspect of the present invention, the unit main body integrally has a liquid suction passage, and the liquid in the bathtub is discharged through the liquid suction passage. Regarding the unit.

  According to a third aspect of the present invention, there is provided a bathtub for storing a liquid, a liquid introduction chamber for introducing an air-dissolved liquid or high-pressure liquid in which air is dissolved, and a micro that generates fine bubbles by ejecting the air-dissolved liquid into the bathtub. A first nozzle opening / closing position that includes a bubble nozzle, a jet nozzle that ejects the high-pressure liquid into the bathtub, and a liquid suction flow path, closes the fine bubble nozzle, and communicates the jet nozzle with the liquid introduction chamber; or the jet nozzle A composite nozzle unit for switching the fine bubble nozzle to a second opening / closing position communicating with the liquid introduction chamber, a liquid suction pipe connected to the liquid suction passage of the composite nozzle unit, and the composite nozzle A liquid introduction pipe connected to the liquid introduction chamber of the unit and a first branch branched from a branch point of the liquid suction pipe and connected to a junction of the liquid introduction pipe A circulation pipe, a second branch circulation pipe branched from the branch point of the liquid suction pipe and connected to the confluence of the liquid introduction pipe, the liquid suction pipe, and the liquid A circulation pump that sucks liquid in the bathtub through the suction flow path and the liquid suction pipe, and discharges high-pressure liquid to the branch point side of the liquid suction pipe, and is disposed in the second branch circulation pipe, A gas-liquid dissolution tank that dissolves in the high-pressure liquid, and at the branch point of the liquid suction conduit, the connection of the liquid suction conduit and the first branch circulation conduit, or the liquid suction conduit and the A first directional switching valve for switching to the connection of the second branch circulation line, and the connection of the first branch circulation line and the liquid introduction line, or the second valve, arranged at the junction of the liquid introduction line Switch to the connection of the branch circulation line and the liquid introduction line A second direction switching valve; and a control device that controls the switching of the first and second direction switching valves and the drive of the circulation pump to execute the fine bubble mode or the jet mode, and includes the control device. Drives the circulation pump and controls the switching of the first and second directional control valves in the fine bubble mode to control the liquid suction line, the second branch circulation line, and the liquid introduction line. Connecting the passages to each other, and in the jet mode, driving the circulation pump and controlling the switching of the first and second directional control valves, and the liquid suction conduit, the first branch circulation conduit, The bathtub system interconnects the liquid introduction pipes, and the composite nozzle unit integrally includes the liquid introduction chamber, the fine bubble nozzle, the jet nozzle, and the liquid suction flow path. And a unit main body to which the bathtub is attached, an operation handle arranged in the bathtub, a nozzle valve seat formed inside each nozzle and opening to the liquid introduction chamber, and a switching arranged in the liquid introduction chamber. A nozzle switching valve having a valve body, wherein the switching valve body is switched to the first opening / closing position or the second opening / closing position based on an operation of the operation handle, and in the first opening / closing position, the liquid The fine bubble nozzle is in contact with the nozzle valve seat of the fine bubble nozzle from the introduction chamber, closes the fine bubble nozzle from the liquid introduction chamber, and contacts the nozzle valve seat of the jet nozzle from the liquid introduction chamber in the second opening / closing position. The present invention relates to a bathtub system that is in contact with and closes the jet nozzle from the liquid introduction chamber.

According to the first aspect of the present invention, the unit main body integrally includes the fine bubble nozzle and the jet nozzle. Therefore, it is not necessary to separately attach each nozzle to the bathtub, and each nozzle is attached to the bathtub only by attaching the unit main body to the bathtub. Can be installed. Thereby, the installation man-hour which attaches a fine bubble nozzle and a jet nozzle to a bathtub can be reduced.
According to the first aspect of the present invention, by operating the operation bundle and switching the switching valve body of the nozzle switching valve to the first opening / closing position or the second opening / closing position, the fine bubble nozzle is introduced into the liquid at the first opening / closing position. The jet nozzle can be communicated with the liquid introduction chamber by closing the chamber. At the second opening / closing position, the jet nozzle can be closed from the liquid introduction chamber, and the fine bubble nozzle can communicate with the liquid introduction chamber. At the first opening / closing position, the high-pressure liquid introduced into the liquid introduction chamber flows into the jet nozzle, and the jet nozzle ejects the high-pressure liquid into the bathtub. In the second opening / closing position, the air-dissolved liquid introduced into the liquid introduction chamber flows into the fine bubble nozzle, and the fine bubble nozzle ejects the air-dissolved liquid into the bathtub to generate fine bubbles in the bathtub liquid.
The switching valve body is brought into contact with the nozzle valve seat of the fine bubble nozzle from the liquid introduction chamber which is the flow direction of the high-pressure liquid (the direction of flow from the liquid introduction chamber to the jet nozzle) at the first opening / closing position. Further, the flow of the air-dissolved liquid (the direction of flow from the liquid-introducing chamber to the fine bubble nozzle) is brought into contact with the nozzle valve seat of the jet nozzle from the liquid-introducing chamber, and the influence of the flow of the high-pressure liquid or air-dissolving liquid can be reduced. Thus, the switching valve body reliably closes each nozzle from the liquid introduction chamber without being separated (opened) from the nozzle valve seat of each nozzle at the first or second opening / closing position.

  In the second aspect of the present invention, the unit main body integrally has the liquid suction flow path, and therefore it is not necessary to separately connect the liquid suction flow path to the bathtub.

In claim 3 according to the present invention, the unit main body integrally includes the fine bubble nozzle, the jet nozzle, and the liquid suction flow path, so that it is not necessary to separately attach each nozzle and the liquid suction flow path to the bathtub. Each nozzle and the liquid suction flow path can be installed in the bathtub simply by being attached to the bathtub. Thereby, the installation man-hour which attaches each nozzle and a liquid suction flow path to a bathtub can be reduced.
According to a third aspect of the present invention, when the circulation pump is driven in the fine bubble mode, the circulation pump sucks the liquid in the bathtub through the liquid suction passage and the liquid suction pipe of the composite nozzle unit, and the high pressure liquid is liquid. Discharge to the branch point side of the suction pipe (downstream of the liquid suction pipe). The high-pressure liquid discharged from the circulation pump is introduced into the gas-liquid dissolution tank through the liquid suction line and the second branch circulation line. The gas-liquid dissolution tank dissolves air into a high-pressure liquid to generate an air-dissolved liquid. The air-dissolving liquid is introduced from the gas-liquid dissolving tank into the liquid introducing chamber of the composite nozzle unit through the second branch circulation line and the liquid introducing line. The bather operates the operation handle to switch the switching valve body to the second opening / closing position. The dissolved air introduced into the liquid introduction chamber flows into the fine bubble nozzle. At this time, at the second opening / closing position, the switching valve body is brought into contact with the nozzle valve seat of the jet nozzle from the liquid introduction chamber which is the flow direction of the air-dissolved liquid (the direction of flow from the liquid introduction chamber to the fine bubble nozzle). The jet nozzle can be reliably closed from the liquid introduction chamber without being separated from the nozzle valve seat of the jet nozzle. Thereby, the air-dissolved liquid introduced into the liquid introduction chamber flows into the fine bubble nozzle without flowing into the jet nozzle, and the fine bubble nozzle ejects the air-dissolved liquid into the bathtub to generate fine bubbles. Can do.
On the other hand, when the circulation pump is driven in the jet mode, the circulation pump sucks the liquid in the bathtub through the liquid suction passage and the liquid suction pipe of the composite nozzle unit, and draws the high-pressure liquid to the branch point side of the liquid suction pipe ( Discharge to the downstream side of the liquid suction line. The high-pressure liquid discharged from the circulation pump is introduced into the liquid introduction chamber of the composite nozzle unit through the liquid suction line, the first branch circulation line, and the liquid introduction line. The bather operates the operation handle to switch the switching valve body to the first opening / closing position. The high-pressure liquid introduced into the liquid introduction chamber flows into the jet nozzle. At this time, at the first opening / closing position, the switching valve body is brought into contact with the nozzle valve seat of the fine bubble nozzle from the liquid introduction chamber, which is the flow direction of the high-pressure liquid (the direction of flow from the liquid introduction chamber to the jet nozzle). The fine bubble nozzle can be reliably closed from the liquid introduction chamber without being separated from the nozzle valve seat of the fine bubble nozzle. Thereby, the high-pressure liquid introduced into the liquid introduction chamber can flow into the jet nozzle without flowing into the fine bubble nozzle, and the high-pressure liquid can be ejected into the bathtub by the jet slur.

It is a perspective view of a composite nozzle unit. It is a disassembled perspective view of a composite nozzle unit. It is a top view of a composite nozzle unit. It is a side view of a composite nozzle unit. It is sectional drawing of a composite nozzle unit, Comprising: It is an AA expanded sectional view of FIG. It is sectional drawing of a composite nozzle unit, Comprising: It is BB expanded sectional drawing of FIG. It is a unit fixing seat which comprises a unit main part, Comprising: (a) is a top view, (b) is a side view, (c) is CC sectional drawing of Fig.7 (a). It is a unit fixing nut which constitutes a unit main part, (a) is a top view, (b) is a side view, and (c) is a DD sectional view of Drawing 8 (a). It is the nozzle unit body which comprises a unit main body, Comprising: (a) is a top view, (b) is a side view, (c) is a bottom view. It is the nozzle unit body which comprises a unit main body, Comprising: (a) is EE sectional drawing of Fig.9 (a), (b) is FF sectional drawing of Fig.9 (a). It is a press nut which constitutes a unit main part, (a) is a top view, (b) is a side view, and (c) is a GG sectional view of Drawing 11 (a). It is the switching valve body which comprises a nozzle switching valve, Comprising: (a) is a top view, (b) is HH partial sectional drawing of Fig.12 (a), (c) is a bottom view. FIG. 3A is a top view, FIG. 2B is a side view, and FIG. 3C is a bottom view. FIG. It is the switching valve holder which comprises a nozzle switching valve, and a valve rotation axis | shaft, Comprising: (a) is a partial sectional side view, (b) is JJ sectional drawing of Fig.14 (a). It is an operation handle, (a) is a top view, (b) is a side view, (c) is a bottom view. FIG. 16 is a cross-sectional view taken along the line KK of FIG. A nozzle switching valve, a valve rotation shaft, and a nozzle unit body, wherein (a) is a cross-sectional view of inserting the valve rotation shaft into the nozzle unit body, and (b) is a nozzle switching valve and valve rotation shaft. It is sectional drawing assembled | attached to. A nozzle switching valve, a valve rotating shaft, a nozzle unit body and a unit fixing nut, wherein (a) is a cross-sectional view of mounting the nozzle unit body assembled with the nozzle switching valve and the valve rotating shaft in the unit fixing nut; (B) is sectional drawing of a nozzle and valve assembly. A composite nozzle unit and a bathtub, (a) a cross-sectional view in which the unit fixing seat and the nozzle / valve assembly are arranged inside and outside the bathtub, and (b) a nozzle / valve assembly mounted on the unit fixing seat, It is sectional drawing attached. It is sectional drawing which attached the operation handle with respect to the unit fixing seat attached to the bathtub, and a nozzle and valve assembly. It is the perspective view which attached the compound nozzle unit to the bathtub. It is the state which switched the switching valve body which comprises a nozzle switching valve to the 1st opening-and-closing position, Comprising: (a) is a bottom side schematic surface, (b) is an enlarged partial cross section schematic diagram. It is the state which separated the switching valve body which comprises a nozzle switching valve from the 1st or 2nd opening-and-closing position, Comprising: (a) is a bottom side schematic surface, (b) is an enlarged schematic diagram. It is the state which switched the switching valve body which comprises a nozzle switching valve to the 2nd opening-and-closing position, Comprising: (a) is a bottom side schematic surface, (b) is an enlarged partial cross section schematic diagram. It is an operation handle, (a) is a top view in the 1st opening-and-closing position, (b) is a top view in the 2nd opening-and-closing position. It is a block diagram of a bathtub system.

  The composite nozzle unit and bathtub system according to the present invention will be described with reference to FIGS.

<Composite nozzle unit>
Hereinafter, the composite nozzle unit will be described with reference to FIGS.

In FIG. 1 thru | or FIG. 25, the composite nozzle unit X is arrange | positioned at the bathtub Y which stores liquid (hot water, water, etc.).
The composite nozzle unit X ejects an air-dissolved liquid in which air is dissolved (high-pressure air-dissolved liquid) or a high-pressure liquid in which air is not dissolved into the bathtub Y, and sucks and drains (takes out) the liquid in the bathtub Y.
The composite nozzle unit X includes a liquid introduction chamber 6, a fine bubble nozzle 7, and a jet nozzle 8, as shown in FIGS. The liquid introduction chamber 6 introduces an air-dissolved liquid or a high-pressure liquid. The fine bubble nozzle 7 ejects the air-dissolved liquid to the bathtub Y and generates fine bubbles (for example, bubbles of 30 μm to 50 μm) in the liquid of the bathtub Y. The jet nozzle 8 ejects high-pressure liquid into the bathtub Y.
The composite nozzle unit X is switched to the first opening / closing position (see FIG. 22) and the second opening / closing position (see FIGS. 5 and 24). The first opening / closing position P <b> 1 is a position where the fine bubble nozzle 7 is closed and the jet nozzle 8 communicates with the liquid introduction chamber 6. The second opening / closing position P <b> 2 is a position where the jet nozzle 8 is closed and the fine bubble nozzle 7 is communicated with the liquid introduction chamber 6.
As shown in FIGS. 1 to 25, the composite nozzle unit X includes a unit main body 1, a nozzle switching valve 2, a valve rotation shaft 3, and an operation handle 5.

<Unit body>
As shown in FIGS. 1 to 11, the unit main body 1 integrally includes a liquid introduction chamber 6, a fine bubble nozzle 7, a jet nozzle 8, and a liquid suction passage 9, and is attached to the bathtub Y. The liquid suction flow path 9 receives liquid from the bathtub Y and discharges it outside the unit body 1.
As shown in FIGS. 1 to 11, the unit main body 1 includes a unit fixing seat 10, a unit fixing nut 11, a nozzle unit body 12 and a presser nut 13 as main components.

As shown in FIGS. 1 to 7, the unit fixing seat 10 has a fixed cylindrical portion 14, a fixed bottom portion 15 and a fixing flange portion 16, and these members are integrally formed.
The fixed bottom portion 15 closes one end opening of the fixed cylindrical portion 14. As a result, the unit fixing seat 10 forms the liquid recess 17 with the fixed cylindrical portion 14 and the fixed bottom portion 15. The liquid recess 17 is open to the other end of the fixed cylindrical portion 14.
The fixed flange portion 16 is located on the other end opening side of the fixed cylindrical portion 14 and is integrally formed with the fixed cylindrical portion 14. The fixed flange portion 16 protrudes outward from the periphery of the fixed cylindrical portion 14 in a direction E (hereinafter referred to as “orthogonal direction E”) orthogonal to the center line of the fixed cylindrical portion 14.

As shown in FIGS. 1 to 7, the unit fixing seat 10 includes a liquid introduction boss 18, a liquid drain boss 19, and a first liquid suction pipe 20.
The liquid introduction boss 18 is located on the fixed bottom portion 15 side and is integrally formed with the fixed cylindrical portion 14. The liquid introduction boss 18 is disposed along an intersecting line perpendicular to the center line of the fixed cylindrical portion 14 in the orthogonal direction E, and protrudes outward from the circumference of the fixed cylindrical portion 14. The liquid introduction boss 18 has a liquid insertion channel 21, and the liquid introduction channel 21 communicates with the liquid recess 17. The liquid introduction channel 21 is inserted (penetrated) through the liquid introduction boss 18 in the orthogonal direction E. The liquid introduction channel 21 is arranged with the center line positioned on the intersection line (see FIG. 7).
The liquid drain boss 19 is located on the fixed bottom portion 15 side and is integrally formed with the fixed cylindrical portion 14. The liquid drain boss 19 is disposed in the liquid recess 17. In the orthogonal direction E, the liquid drain boss 19 is inserted (penetrated) through the fixed cylindrical portion 14 from the liquid recess 17 and protrudes outward around the fixed cylindrical portion 14. The liquid drain boss 19 is positioned along the intersection line with an angle of 180 degrees around the center line of the fixed cylindrical portion 14 with respect to the liquid introduction boss 18.
The liquid drainage boss 19 has a liquid drainage channel 22, and the liquid drainage channel 22 opens in the liquid recess 17 and outside the unit fixing seat 10. The liquid drainage channel 22 is arranged with the center line positioned on the intersection (see FIG. 7).
The first liquid suction pipe 20 is disposed in the liquid recess 17 and attached to the liquid drain boss 19. The first liquid suction pipe 20 communicates with the liquid drain passage 21 and extends into the liquid recess 17 in the center line direction F of the fixed cylindrical portion 14 (hereinafter referred to as “center line direction F”).
The first liquid suction pipe 20 has a center line located on the intersection line and is disposed at a distance B from the center line of the fixed cylindrical portion 14 (see FIG. 7).

As shown in FIGS. 2 to 7, the unit fixing seat 10 has an air suction hole 23 and an inner screw portion 24, and the air suction hole 23 is formed in the fixed bottom portion 15. In the centerline direction F, the air suction hole 23 is inserted (penetrated) through the fixed bottom 15 and communicated with the inside of the first liquid suction pipe 20 and the outside of the unit fixing seat 10.
The inner screw portion 24 is formed on the inner periphery of the fixed cylindrical portion 14. The inner screw portion 24 is disposed between the other end of the fixed cylindrical portion 14 (on the fixed flange portion 16 side) and the bosses 18 and 19.

As shown in FIGS. 2, 5, 6, and 8, the unit fixing nut 11 has a fixed cylindrical portion 25 and a fixing flange portion 26, and these members are integrally formed.
The fixed cylindrical portion 25 has a presser protrusion 28, and the presser protrusion 28 is located on one end opening side of the fixed cylindrical portion 25 and is integrally formed with the fixed cylindrical portion 25. The presser protrusion 28 protrudes inwardly around the fixed cylindrical portion 25 in a direction G (hereinafter referred to as “orthogonal direction G”) orthogonal to the center line of the fixed cylindrical portion 25.
The fixed flange portion 26 is integrally formed with the fixed cylindrical portion 25, located at the other end opening side of the fixed cylindrical portion 25. The fixed flange portion 26 protrudes outward in the orthogonal direction G around the fixed cylindrical portion 25.

  As shown in FIGS. 2, 5, 6, and 8, the unit fixing nut 11 includes an outer screw portion 29 and an inner screw portion 30, and the outer screw portion 29 is formed on the outer periphery of the fixed cylindrical portion 25. The external thread portion 29 is disposed between one end of the fixed flange portion 26 and the fixed cylindrical portion 25. The inner screw portion 30 is formed on the inner periphery of the fixed cylindrical portion 25. The inner screw portion 32 is disposed on the other end side of the fixed cylindrical portion 25.

  As shown in FIGS. 1 to 6, 9 and 10, the nozzle unit body 12 includes an upper / circular plate portion 33, a lower / circular plate portion 34, a central tube 35, a second liquid suction tube 36, a fine It includes a bubble nozzle 7 and a nozzle jet 8, and these members are integrally formed.

  As shown in FIGS. 2, 5, 6, 9, and 10, the upper and lower / circular plate portions 33 and 34 have circular front surfaces 33 a and 34 a and circular rear surfaces 33 b and 34 b. The circular plate portions 33 and 34 are arranged in parallel with the circular back surfaces 33b and 34b facing each other. The circular plate portions 33 and 34 are arranged at intervals in the center line direction H of the circular plate portions 33 and 34 (hereinafter referred to as “center line direction H”).

  As shown in FIGS. 5, 6, 9, and 10, the central tube 35 is located between the circular plate portions 33 and 34, located at the center line of the circular plate portions 33 and 34. In the centerline direction H, the central tube 35 is inserted (penetrated) through the disc plate portions 33 and 34 and is opened to the circular surfaces 33 a and 34 a of the circular plate portions 33 and 34. The central tube 35 forms a valve rotation shaft hole 38.

  As shown in FIGS. 5, 6, 9, and 10, the second liquid suction pipe 36 is disposed between the circular plate portions 33 and 34. The second liquid suction pipe 36 is arranged with a center line positioned on an intersecting line orthogonal to the center lines of the circular plate portions 33 and 34 and spaced from the center line of the circular plate portions 33 and 34 by a distance B (see FIG. 9). The second liquid suction pipe 36 has a plurality of liquid suction holes 37, 37,..., And each liquid suction hole 37, 37,... Penetrates (penetrates) the upper circular plate portion 33 in the center line direction H. ing. The second liquid suction pipe 36 is inserted (penetrated) through the lower circular plate portion 34 in the center line direction H and protrudes from the circular surface 34a.

As shown in FIG. 9, the fine bubble nozzle 7 has an angle α (α = 120 ° to 150 ° in one direction around the center line of the circular plate portions 33 and 34 with respect to the second liquid suction pipe 36 (intersection line). °) spaced apart.
As shown in FIG. 9, the jet nozzle 8 is disposed at an angle −α in the other direction around the center line of the circular plate portions 33 and 34 with respect to the second liquid suction pipe 36 (intersection line).
The nozzles 7 and 8 are arranged on a circumference P having a radius R from the center line of the circular plate portions 33 and 34, and are arranged with an intersection line between the nozzles 7 and 8.

As shown in FIGS. 2, 5, 6, 9, and 10, the fine bubble nozzle 7 is disposed between the circular plate portions 33 and 34, and the lower and disc plate portions 34 in the center line direction H. Is inserted (penetrated). The fine bubble nozzle 7 opens on the circular surface 34a of the lower circular plate portion 34 to form a liquid inlet 7A.
The fine bubble nozzle 7 is inserted (penetrated) through the upper circular plate portion 33 in the center line direction H and extends above the circular surface 33a.
As shown in FIGS. 2 and 6, the fine bubble nozzle 7 has a resistance plate 39, and the resistance plate 39 is mounted in the fine bubble nozzle 7. The resistance plate 39 has a plurality of small holes 39a, 39a,. Each of the small holes 39a, 39a... Communicates with the fine bubble nozzle 7 by inserting (penetrating) the resistance plate 39 in the center line direction H.

As shown in FIGS. 2, 5, 6, 9, and 10, the jet nozzle 8 is disposed between the circular plate portions 33 and 34, and is inserted through the lower circular plate portion 34 in the center line direction H. (Penetrating). The jet nozzle 8 opens on the circular surface 34a of the lower circular plate portion 34 to form a liquid inlet 8A.
As shown in FIG. 5, the jet nozzle 8 has a throttle hole 8B, and the throttle hole 8B is inserted (penetrated) through the upper / circular plate portion 33 in the center line direction H and opens to the circular surface 33a.
The jet nozzle 8 is inserted (penetrated) through the upper circular plate portion 33 in the center line direction H, and extends above the circular surface 33a.

  As shown in FIGS. 2, 9, and 10, the nozzle unit body 12 includes a plurality of rotation restricting protrusions 41 and 42. The rotation restricting protrusions 41 and 42 are integrally formed with the lower / circular plate portion 34, and project from the circular surface 34 a in the center line direction H. The rotation restricting protrusions 41 and 42 are formed outside the nozzles 7 and 8 with the nozzles 7 and 8 (the liquid introduction ports 7A and 8A) disposed therebetween.

As shown in FIGS. 2, 5, 6, and 11, the presser nut 13 includes a presser cylindrical portion 43 and a presser flange portion 44, and these members are integrally formed.
The presser flange portion 44 is located on one end opening side of the presser cylindrical portion 34 and is integrally formed with the presser cylindrical portion 43. The presser flange portion 44 protrudes outward from the circumference of the presser cylindrical portion 43 in a direction J orthogonal to the center line of the presser cylindrical portion 43.
The presser nut 13 has an outer screw portion 45, and the outer screw portion 45 is formed on the outer periphery of the presser cylindrical portion 43.

As shown in FIGS. 1 to 6, the unit main body 1 has a unit fixing nut 11 mounted in a unit fixing seat 10. The unit fixing nut 11 is integrated with the unit fixing seat 11 by screwing the outer screw portion 29 to the inner screw portion 24 of the unit fixing seat 10.
Subsequently, the nozzle unit body 12 is mounted in the unit fixing nut 11. The nozzle unit body 12 is inserted into the fixed cylindrical portion 25 from the lower / circular plate portion 34 side, and the lower / circular plate portion 34 is brought into contact with the pressing protrusion 28 of the fixed cylindrical portion 25. The nozzle unit body 12 is inserted into the cylindrical portion 25 of the unit fixing nut 11 in a liquid-tight state with a sealing material 46.
In the nozzle unit body 12, the first liquid suction pipe 20 is inserted into the second liquid suction pipe 36. The first liquid suction pipe 20 is inserted into the second liquid suction pipe 36 in a liquid-tight manner with a plurality of sealing materials 47 and 47.
As a result, the second liquid suction pipe 36, the first liquid suction pipe 20, and the liquid drainage path 21 are communicated with each other to form the liquid suction flow path 9. The liquid suction channel 9 is formed by the second liquid suction tube 36, the first liquid suction tube 20, and the liquid drainage channel 21.
Further, as shown in FIGS. 3 and 6, the liquid introduction channel 21 (intersection line) is located at the center between the nozzles 7 and 8 and opens to the liquid introduction chamber 6 in the orthogonal direction E of the fixed cylindrical portion 25. doing. That is, when the first liquid suction pipe 20 is inserted into the second liquid suction pipe 36, the nozzles 7 and 8 are positioned at equal intervals on both sides of the liquid introduction channel 21 by the suction pipes 36 and 20. .
The unit fixing seat 10 and the nozzle unit body 12 form the liquid introduction chamber 6 between the lower / circular plate portion 34 and the fixed bottom portion 15. The liquid introduction ports 7 A and 8 A of the nozzles 7 and 8 are opened to the liquid introduction chamber 6, and the central tube 35 (valve rotation shaft hole 38) is also communicated with the liquid introduction chamber 6.
Subsequently, the presser nut 13 is mounted in the unit fixing nut 11 and disposed on the nozzle unit body 12. The presser nut 13 screws the outer screw part 45 to the inner screw part 30 of the unit fixing net 11 and abuts the presser cylindrical part 43 against the circular surface 33 a of the upper circular plate part 33. Further, the presser flange portion 44 of the presser nut 13 is accommodated in the fixed cylindrical portion 25 of the unit fixing nut 11.
As a result, the nozzle unit body 12 is held between the presser protrusion 28 and the presser nut 13, and cannot be rotated with respect to the unit fixing seat 10 by the liquid suction pipes 20 and 36.
As described above, when the unit fixing seat 10, the unit fixing nut 11, the nozzle unit body 12, and the presser nut 13 are integrated, the liquid suction passage 9 (the respective liquid suction pipes 20 and 37) is disposed inside the presser nut 13. The unit cylinder 1 is communicated with the outside through the presser cylinder portion 43. The fine bubble nozzle 7 is disposed inside the presser nut 13 and protrudes outside the unit main body 1 through the presser cylindrical portion 43. The jet nozzle 8 is disposed inside the presser nut 13 and communicates with the outside of the unit body 1 through the presser cylindrical portion 43.

<Nozzle switching valve>
As shown in FIGS. 2, 5, 6, and 12 to 14, the nozzle switching valve 2 is disposed in the liquid introduction chamber 6, and includes a plurality of nozzle valve seats 51, 52, a switching valve holder 53, a switching valve. A body 54 and a switching valve spring 55 (coil spring) are provided.

Each nozzle valve seat 51, 52 is formed inside the fine bubble nozzle 7 and inside the jet nozzle 8, as shown in FIGS. The nozzle valve seat 51 is formed at the liquid introduction chamber 6 side end (liquid introduction port 7A) of the fine bubble nozzle 7 and opens into the liquid introduction chamber 6 (see FIG. 6).
The nozzle valve seat 52 is formed at the liquid introduction chamber 6 side end (liquid introduction port 8A) of the jet nozzle 8 and opens into the liquid introduction chamber 6 (see FIG. 5).

The switching valve holder 53 is disposed in the liquid introduction chamber 6 as shown in FIGS. 5 and 6. The switching valve boulder 53 is positioned between the rotation restricting projections 41 and 42 and is arranged in parallel to face the circular surface 34a (the nozzle valve seats 51 and 52) of the lower circular plate portion 34 (FIG. 5). FIG. 6 and FIG. 22).
In the centerline direction H, the switching valve holder 53 is disposed at a distance from the lower / circular plate portion 34.
As shown in FIGS. 2, 5, 6, 13, and 14, the switching valve holder 53 includes a storage recess 53 </ b> A and a liquid introduction hole 53 </ b> B. The housing recess 53A is disposed on a circumference P having a radius R from the center line of the circular plate portions 33 and 34 (the center axis line of the valve rotation shaft 3). The storage recess 53A is open to the lower side / circular plate part 34 side in the center line direction H. The liquid introduction hole 53B communicates with the storage recess 53B. In the centerline direction H, the liquid introduction hole 53B is inserted (penetrated) through the switching valve holder 53 and is opened to the liquid introduction chamber 6 on the fixed bottom 15 side of the unit fixing seat 10.

As shown in FIGS. 5 and 6, the switching valve body 54 is located in the liquid introduction chamber 6, located between the lower circular plate portion 34 (the nozzle valve seats 51 and 52) and the switching valve holder 53. The
The switching valve body 54 is switched to the first opening / closing position P <b> 1 or the second opening / closing position P <b> 2 based on the turning operation of the operation handle 5. The switching valve body 54 is brought into contact with the nozzle valve seat 51 of the fine bubble nozzle 7 from the liquid introduction chamber 6 at the first opening / closing position P1, and closes the fine bubble nozzle 7 from the liquid introduction chamber 6 to the second opening / closing position P2. , The liquid introduction chamber 6 is brought into contact with the nozzle valve seat 52 of the jet nozzle 8 to close the jet nozzle 8 from the liquid introduction chamber 6.

As shown in FIGS. 2, 5, 6, and 12, the switching valve body 54 is disposed in the liquid introduction chamber 6, and the nozzle unit body 12 (lower side / circular plate portion 34) is disposed on the liquid introduction passage 21. ). The switching valve body 54 is disposed between the lower circular plate portion 34 (the nozzle valve seats 51 and 52) and the switching valve holder 53. The switching valve body 54 is slidably inserted into the storage recess 53 </ b> A of the switching valve holder 53.
The switching valve body 54 has a spring accommodating recess 54A. The spring accommodating recess 54A opens to the liquid introduction hole 53B side and communicates with the liquid introduction chamber 6 through the liquid introduction hole 53B.

  The switching valve spring 55 is disposed in the storage recess 53 </ b> A of the switching valve holder 53 and the spring storage recess 54 </ b> A of the switching valve body 54. The switching valve spring 55 abuts against the switching valve holder 53 and the switching valve body 54 and presses the switching valve body 54 against the circular surface 34a of the lower circular plate portion 34 and the nozzle valve seats 51 and 52 (Appendix). Vigor).

<Valve rotation axis>
As shown in FIGS. 2, 5, 6, 13, and 14, the valve rotation shaft 3 is inserted into the valve rotation shaft hole 38 (central tube 35) of the nozzle unit body 12, and the nozzle unit body. 12 is rotatably supported. The valve rotation shaft 3 protrudes into the liquid introduction chamber 6 in the center line direction H, extends through the presser cylindrical portion 43 of the presser nut 13, and extends to the outside of the unit main body 1.
The valve turning shaft 3 is integrally formed (connected) to the switching valve holder 53 in the liquid introduction chamber 6 and supports the switching valve holder main body 53, the switching valve body 54, and the switching valve spring 55.

The valve rotation shaft 3 includes a stop projection 56 and a plurality of stop ring grooves 57 and 58. The stop projection 56 is formed on the switching valve holder 53 side (one axis end side of the valve rotation shaft 3), and is brought into contact with one end of the central tube 35 (lower side / circular plate portion 34) from the liquid introduction chamber 6 side.
The retaining ring groove 57 is formed on the other shaft end side of the valve rotation shaft 3 and is disposed outside the unit main body 1. The retaining ring groove 58 is formed between the retaining projection 56 and the retaining ring groove 58 and is disposed above the nozzle unit body 12 and above the circular plate portion 33.

As shown in FIGS. 5, 6, 13, and 14, the valve rotation shaft 3 has a plurality of positioning grooves 3 </ b> A and 3 </ b> A, and the positioning grooves 3 </ b> A and 3 </ b> A are interposed between the retaining ring grooves 57 and 58. Be placed.
Each positioning groove 3A, 3A is disposed with an angle of 180 ° around the axis center line of the valve rotation shaft 3, extends in the axis center line direction K, and is inserted (penetrated) into the other end of the valve rotation shaft 3. ing.

The valve turning shaft 3 is restricted from being pulled out of the nozzle unit main body 12 (unit main body 1) by the stop protrusion 56 and the C ring 59 by mounting the C ring 59 in the stop ring groove 58.
The valve rotation shaft 3 abuts the stop projection 56 on one end (the lower side / circular plate portion 34) of the central tube 35, so that the switching valve holder 53 is connected to the circular surface 34a (each nozzle valve) of the lower / circular plate portion 34. It is made to oppose seat 51,52).

<Operation handle>
The operation bundle 5 is arrange | positioned in the bathtub Y (refer FIG. 20, FIG. 21).
As shown in FIGS. 1 to 6, 15, and 16, the operation handle 5 is manually rotated to move the switching valve body 54 (nozzle switching valve 2) to the first opening / closing position P <b> 1 or the second opening / closing position. Switch to P2.
The operation handle 5 includes a gripping cylindrical part 61, a gripping plate part 62, an inner cylindrical part 63, and an inner bottom part 64, and these members are integrally formed.

  The grip plate 62 closes one end opening of the grip cylinder portion 61. The grip plate part 62 has a liquid circulation port 65, and the liquid circulation port 65 is formed in a circular hole and is disposed on the center line of the grip cylinder part 61. The liquid circulation port 65 is inserted (penetrated) through the gripping plate portion 62 in the centerline direction K of the gripping cylindrical portion 61 (hereinafter referred to as “centerline direction L”).

  The inner cylindrical portion 63 is formed integrally with the grip plate portion 62 so as to be continuous with the liquid circulation port 65. The inner cylindrical portion 63 protrudes inside the gripping cylindrical portion 61 in the centerline direction L. The inner bottom part 64 closes one end opening of the inner cylindrical part 63 opposite to the liquid circulation port 65. As a result, the operation handle 5 forms a liquid flow recess 66 by the inner cylindrical portion 63 and the inner bottom portion 65. The liquid circulation recess 66 is formed in a circular recess and opens at the liquid circulation port 65.

The operation handle 5 has a central connection hole 67, a plurality of suction small holes 68, 68,..., And a nozzle insertion long hole 69. The central connection hole 67, each suction small hole 68, 68,. Formed on the bottom 64.
The central connecting hole 67 is located at the center line of the gripping cylindrical portion 62 (inner cylindrical portion 64) and is inserted (through) the inner bottom portion 64 in the center line direction L.
Each of the suction small holes 68, 68,... Is arranged in the lower half region of the inner bottom portion 64, and is inserted (penetrated) through the inner bottom portion 64 in the center line direction L to communicate with the liquid inflow recess 66.
The nozzle insertion long hole 68 is disposed in the upper half region of the inner bottom portion 64 and is inserted (penetrated) through the inner bottom portion 64 in the center line direction L to communicate with the liquid circulation recess 66. The nozzle insertion slot 68 is formed as a semicircular slot.

As shown in FIGS. 5, 6, 15, and 16, the operation handle 5 includes a plurality of handle rotation restricting protrusions 70 and 71 and a connecting cylinder portion 72. The handle inner bottom 64 is integrally formed. The handle rotation restricting protrusions 70 and 71 are located at both ends of the nozzle insertion slot 69 and protrude below the inner bottom portion 64.
The connecting cylinder part 72 is formed integrally with the inner bottom part 64 continuously to the central connecting hole 67. In the centerline direction L, the connecting cylinder part 72 protrudes below the inner bottom part 64.
The connection cylindrical part 72 has a plurality of rotation stop protrusions 73 and 74, and each rotation stop protrusion 73 and 74 is formed on the inner periphery of the connection cylinder part 70. The rotation stop protrusions 73 and 74 are arranged around the center line of the gripping cylindrical portion 61 at an angle of 180 ° and extend in the center line direction L.
As shown in FIGS. 5, 6 and 16, the operation handle 5 has a plurality of guide projections 75, 75,..., Each guide projection 75, 75,. 61 are arranged at equal angles around the center line of 61. Each of the guide projections 75, 75,... Protrudes below the inner bottom portion 64 in the center line direction L.

As shown in FIGS. 5 and 6, the operation bundle 5 is connected to the valve rotation shaft 3 outside the unit main body 1. The operation handle 5 inserts the other end side of the valve turning shaft 3 into the connecting cylindrical portion 72. At this time, the rotation stop projections 73 and 74 of the connecting cylindrical portion 72 are inserted into the positioning grooves 3A and 3A of the valve rotation shaft 3 to connect the operation handle 5 to the valve rotation shaft 3 in a non-rotatable manner.
When the operation bundle 5 is connected to the valve rotation shaft 3, the retaining ring groove 57 of the valve rotation shaft 3 projects into the liquid flow recess 66 of the operation bundle 5. Then, the C ring 76 is mounted in the retaining ring groove 57, and the removal of the operation handle 5 is restricted by the C ring 76.
Further, the operation handle 5 inserts the fine bubble nozzle 7 and the jet nozzle 8 into the nozzle insertion long hole 68 so as to project into the liquid circulation recess 66. The operation handle 5 opposes each suction small hole 68, 68, ... to the second liquid suction pipe 36 (each suction port 37) of the nozzle unit body 12.
Further, as shown in FIGS. 5 and 6, the operation handle 5 has the fixing flange portion 16 of the unit fixing nut 11 disposed inside the gripping cylindrical portion 61, and the guide protrusions 75, 75,. It abuts on the flange portion 44.
Thereby, the operation handle 5 and the switching valve body 54 are connected through the valve rotating shaft 3 and the switching valve holder 53 and are rotatably supported by the nozzle unit body 12 (unit main body 1).

<Combination nozzle unit bathtub installation procedure>
Next, a procedure for attaching the composite nozzle unit X to the bathtub Y will be described with reference to FIGS.

First, before attaching the composite nozzle unit X to the bathtub Y, as shown in FIGS. 17 and 18, for example, a nozzle / valve assembly A is configured. As shown in FIG. 18, the nozzle / valve assembly A is an assembly in which the nozzle switching valve 2, the valve rotating shaft 3, the unit fixing unit 11, the nozzle unit body 12, and the presser nut 13 are assembled together. is there. This will be described below.
(I) In the nozzle switching valve 2, the switching valve body 54 and the switching valve spring 55 are arranged in the housing recess 53 </ b> A of the switching valve holder 53. The switching valve body 54 houses the switching valve spring 55 in the spring housing recess 54A. The switching valve spring 55 is brought into contact with the switching valve holder 53 and the switching valve body 54 [see FIG. 17A].
(Ii) The valve rotation shaft 3 is assembled to the nozzle unit body 12 together with the nozzle switching valve 2.
The valve rotation shaft 3 is inserted into the valve rotation shaft hole 38 (central tube 35) from the lower / circular plate portion 34 side. The valve turning shaft 3 is inserted into the valve turning hole 38 from the side of the retaining ring grooves 57 and 58 by disposing the switching valve boulder 53 and the switching valve body 54 between the rotation restricting projections 41 and 42, 56 abuts one end (lower side / circular plate portion 34) of the central tube 35 (see FIG. 17).
As a result, the switching valve holder 53 is arranged at a distance from the lower / circular plate portion 34, and presses the switching valve body 54 against the circular surface 34 a of the lower / circular plate portion 34. The switching valve body 54 compresses the switching valve spring 55 as the lower / circular plate portion 34 is pressed.
Further, in the valve rotation shaft 3, the retaining ring grooves 57 and 58 are inserted through the valve rotation shaft hole 38 and protrude outside the nozzle unit body 12.
Subsequently, the valve rotation shaft 3 is pivotally supported by the nozzle unit body 12 by mounting the C link 59 in the retaining ring groove 58. Further, the valve turning shaft 3 is secured by a retaining projection 56 and a C ring 59.
Thus, the valve rotation shaft 3 and the nozzle switching valve 2 (switching valve body 54) are assembled to the nozzle unit body 12 so as to be freely rotatable.
(Iii) The nozzle unit body 12 is attached to the unit fixing nut 11 when the nozzle switching valve 2 and the valve rotation shaft 3 are assembled (see FIG. 18).
The nozzle unit body 12 is inserted into the fixed cylindrical portion 25 from the switching valve holder 53 (lower side / circular plate portion 34) side, and abuts against the presser protrusion 28 of the fixed cylindrical portion 25.
(Iv) The presser nut 13 is attached to the unit fixing nut 11 (see FIG. 18).
The presser nut 13 screws the outer screw part 45 of the presser cylinder part 43 to the inner screw part 30 of the fixed cylinder part 25.
The presser nut 13 abuts the presser cylindrical portion 43 against the upper circular plate portion 33 and stores the presser flange portion 44 in the fixed cylindrical portion 25. At this time, the fine bubble nozzle 7, the jet nozzle 8 and the valve rotation shaft 3 are arranged inside the presser cylinder portion 43.
As a result, the nozzle switching valve 2, the valve rotation shaft 3, the unit fixing nut 11, the nozzle unit body 12, and the presser nut 13 are assembled together to form a nozzle / valve assembly A.

Next, the nozzle / valve assembly A and the unit fixing seat 10 are attached to the bathtub Y. This will be described below.
As shown in FIG. 19, the bathtub Y has one nozzle mounting hole 100, and the nozzle mounting hole 100 passes through (through) the inner wall Y <b> 1 of the bathtub Y.
(A) The unit fixing seat 10 is disposed outside the bathtub Y as shown in FIG.
The unit fixing seat 10 has a fixing flange portion 16 arranged around the nozzle mounting hole 100. The fixed flange portion 16 is brought into contact with the inner wall 1 of the bathtub Y with the annular packing 101 interposed therebetween.
(B) The nozzle / valve assembly A is disposed inside the bathtub Y.
As shown in FIG. 19, the nozzle / valve assembly A is inserted into the nozzle mounting hole 100 from the fixed cylindrical portion 25 (switching valve holder 53) side of the unit fixing nut 11, and is further mounted in the unit fixing seat 10. .
At this time, the first liquid suction pipe 20 of the unit fixing seat 10 is inserted into the second liquid suction pipe 36 of the nozzle unit body 12, and the external thread portion 29 of the unit fixing nut 11 is inserted into the inner part of the unit fixing seat 10. Screwed onto the screw portion 24.
(C) Subsequently, the nozzle and valve assembly A is inserted into the unit fixing seat 10 by rotating the unit fixing nut 11.
In the nozzle / valve assembly A, the fixing flange portion 26 of the unit fixing nut 11 is brought into contact with the inner wall Y 1 of the bathtub Y as the unit fixing nut 11 rotates. The fixed flange portion 26 is brought into contact with the inner wall Y1 of the bathtub Y with a plurality of annular packings 102 interposed therebetween.
Thereby, the fixing flange portion 16 of the unit fixing seat 10 and the fixing flange portion 26 of the unit fixing nut 11 sandwich the inner wall Y1 of the bathtub Y, and attach the unit fixing seat 10 and the nozzle / valve assembly A to the bathtub Y.
(D) The operation handle 5 is disposed inside the bathtub Y as shown in FIG. The operation handle 5 inserts the valve turning shaft 3 into the connecting cylindrical portion 72. At this time, the rotation stop projections 73 and 74 of the connecting cylindrical portion 72 are inserted into the positioning grooves 3A and 3A of the valve rotation shaft 3 to connect the operation handle 5 to the valve rotation shaft 3 so that the operation handle 5 cannot be rotated. . Further, the guide protrusions 75, 75,... Are brought into contact with the presser flange portion 44 of the presser nut 13.
Subsequently, the C-ring 75 is mounted in the retaining ring groove 57 of the valve rotation shaft 3 to prevent the operation bundle 5 from being removed.
Thereby, the operation bundle 5 is arrange | positioned in the bathtub Y, and is manually rotated.
The nozzles 7 and 8 are disposed in the liquid flow recess 66 through the nozzle insertion slot 69 of the operation bundle 5, and the plurality of suction small holes 68, 68,... Are arranged in the liquid suction holes 37 of the second liquid suction pipe 36. 37,.
Further, the liquid introduction chamber 6 is formed between the fixed bottom portion 15 of the unit fixing seat 10 and the lower / circular plate portion 34 of the nozzle unit body 12, and the first and second liquid suction pipes 20 and 36 and the liquid drainage flow path 22 are formed. Thus, the liquid suction flow path 9 is formed.
The switching valve holder 53, the switching valve body 54 and the switching valve spring 55 (nozzle switching valve 2) are disposed in the liquid introduction chamber 6. The switching valve body 54 is disposed between the liquid introduction flow path 21 and the nozzle unit body 12 (lower side / circular plate portion 34). Furthermore, the nozzles 7 and 8 are positioned by positioning the liquid introduction passages 21 in the center between the nozzles 7 and 8 as shown in FIG. The valve seats 51 and 52 are opened to the liquid introduction chamber 6.

<Nozzle switching of composite nozzle unit>
Next, the switching operation of the first opening / closing position P1 or the second opening / closing position P2 in the composite nozzle unit X will be described with reference to FIGS. 1 to 6 and FIGS.
For convenience of explanation, it is assumed that the nozzle switching valve 2 is in the first opening / closing position P1, as shown in FIG. 22, and the switching valve body 54 is brought into contact with the nozzle valve seat 51 of the fine bubble nozzle 7 from the liquid introduction chamber 6. The fine bubble nozzle 7 is closed from the liquid introduction chamber 6 in contact therewith. The jet nozzle 8 communicates with the liquid introduction chamber 6 as shown in FIG.

At the first opening / closing position P1 of the composite nozzle unit X, as shown in FIG. 25A, the bather grips the operation bundle 5 and rotates the operation bundle 5 in the normal direction.
With the forward rotation of the operation handle 5, the valve turning shaft 3 and the switching valve holder 53 are also rotated, and the switching valve body 54 slides into the accommodating recess 53A while compressing the switching valve spring 55, and the fine bubble nozzle 7 It is extracted from the inside and separated from the nozzle valve seat 51. Thereby, the fine bubble nozzle 7 is communicated with the liquid introduction chamber 6 [see FIGS. 22 and 23].
The operation handle 5 is guided by the guide protrusions 75, 75,... That abut on the presser flange portion 44 of the presser nut 13.

  In the nozzle switching valve 2, the switching valve body 54 is lowered by the spring force of the switching valve spring 55 as shown in FIG. 23 in accordance with the normal rotation of the operation bundle 5 (the valve rotation shaft 3 and the switching valve holder 53). Abutting / pressing on the circular surface 34 a of the side / circular plate portion 34, it is swung along the circumference P. At this time, the switching valve element 54 is guided (guided) in contact with the circular surface 34a of the lower / circular plate portion 34, so that the switching valve element 54 is not pulled out from the storage recess 53A of the switching valve holder 53 during normal rotation.

Subsequently, as shown in FIGS. 5 and 24, the switching valve body 54 is inserted into the jet nozzle 8 and brought into contact with the nozzle valve seat 52. At this time, since the switching valve body 54 is pressed against the nozzle valve seat 52 by the spring force of the switching valve spring 55, the jet nozzle 8 is liquid-tightly closed from the liquid introduction chamber 6. A part of the switching valve body 54 is inserted into the jet nozzle 8.
Thereby, the switching valve body 54 (nozzle switching valve 2) is switched from the first opening / closing position P1 to the second opening / closing position P2 based on the forward rotation operation of the operation handle 5, and the jet nozzle 8 is moved from the liquid introduction chamber 6 to the nozzle. The fine bubble nozzle 7 is communicated with the liquid introduction chamber 6.

Further, as shown in FIG. 24, the switching valve holder 53 abuts against the rotation restricting protrusion 42 at the second opening / closing position P2, and the switching valve holder 53. The forward rotation of the valve rotation shaft 3 (operation bundle 5) is restricted by the rotation restricting protrusion 42.
Further, at the second opening / closing position P2, the rotation stop protrusion 70 (one end of the nozzle insertion slot 69) of the operation bundle 5 abuts on the fine bubble nozzle 7 as shown in FIG. Regulate forward rotation.
Thereby, it can restrict | limit that the switching valve body 54 carries out forward rotation too much, and can control separating the switching valve body 54 from the nozzle valve seat 52 of the jet nozzle 8, and it hold | maintains in the 2nd opening-and-closing position P2.

At the second opening / closing position P2, as shown in FIGS. 5 and 24, the air-dissolved liquid is introduced from the liquid introduction channel 21 into the liquid introduction chamber 6. At this time, since the air-dissolved liquid flows into the fine bubble nozzle 7 on one side from the liquid introduction flow path 21 located in the center between the nozzles 7 and 8, the switching valve body that closes the jet nozzle 8 on the other side. The switching valve body 54 is not separated from the nozzle valve seat 52 of the jet nozzle 8.
The fine bubble nozzle 7 discharges the air-dissolved liquid through the small holes 39a, 39a,... Of the resistance plate 39 to the bathtub Y under reduced pressure to generate fine bubbles (30-50 μm bubbles) in the liquid in the bathtub Y (FIG. 20). And FIG. 21).
Further, in the composite nozzle unit X, when air-dissolved liquid (high-pressure air-dissolved liquid) is introduced into the liquid introduction chamber 6, the air-dissolved liquid passes through the liquid introduction hole 53 </ b> B of the switch valve holder 53 and the spring accommodating recess of the switch valve body 54. 54A.
Thereby, in the nozzle switching valve 2, the switching valve body 54 is pressed against the nozzle valve seat 52 by the spring force of the switching valve spring 55 and the pressure of the air-dissolving liquid, so that the air-dissolving liquid introduced into the liquid introducing chamber 6 Even if it is affected, it is not separated from the nozzle valve seat 52 of the jet nozzle 8 (it is not pulled out from the jet nozzle 8).
The switching valve body 54 is disposed on the liquid introduction flow path 6, and the nozzle of the jet nozzle 8 from the liquid introduction chamber 6, which is the flow direction of the air-dissolved liquid (the direction of flow from the liquid introduction chamber 6 to the fine bubble nozzle 7). Since it is in contact with the valve seat 52, it is not separated from the nozzle valve seat 52 of the jet nozzle 8 by the flow of the air dissolved liquid.

At the second opening / closing position P2 of the composite nozzle unit X, as shown in FIG. 25B, the bather grips the operation handle 5 and rotates the operation handle 5 in the reverse direction.
Along with the reverse rotation of the operation handle 5, the valve turning shaft 3 and the switching valve boulder 53 are also rotated, and the switching valve body 54 slides into the storage recess 53A while compressing the switching valve spring 55, and into the jet nozzle 8. And is separated from the nozzle valve seat 52. Thereby, the jet nozzle 8 communicates with the liquid introduction chamber 6 [see FIGS. 23 and 24].

  In the nozzle switching valve 2, the switching valve body 54 is lowered by the spring force of the switching valve spring 55 as shown in FIG. 23 in accordance with the reverse rotation of the operation handle 5 (the valve turning shaft 3 and the switching valve holder 53). Abutting / pressing on the circular surface 34 a of the side / circular plate portion 34, it is swung along the circumference P. At this time, since the switching valve body 54 is guided (guided) in contact with the circular surface 34a of the lower / circular plate portion 34, the switching valve body 54 is not pulled out from the storage recess 53A of the switching valve holder 53 during reverse rotation.

Subsequently, as shown in FIG. 22, the switching valve body 54 is inserted into the fine bubble nozzle 7 and is brought into contact with the nozzle valve seat 51. At this time, the switching valve body 54 is pressed against the nozzle valve seat 51 by the spring force of the switching valve spring 55, so that the fine bubble nozzle 7 is liquid-tightly closed from the liquid introduction chamber 6. A part of the switching valve body 54 is inserted into the fine bubble nozzle 8.
Thereby, the switching valve body 54 (nozzle switching valve 2) is switched from the second opening / closing position P2 to the first opening / closing position P1, closing the fine bubble nozzle 7 from the liquid introduction chamber 6, and the jet nozzle 8 being the liquid introduction chamber. 6 communicates.

Further, the switching valve holder 53 abuts on the rotation restricting projection 41 at the first opening / closing position P1, and reverse rotation of the switching valve holder 53 and the valve turning shaft 3 (operation bundle 5) is restricted by the rotation restricting projection 41. Is done.
Further, at the first opening / closing position P1, the rotation restricting protrusion 52 (the other end of the nozzle insertion slot 69) of the operation bundle 5 abuts on the jet nozzle 8 and restricts the reverse rotation of the operation handle 5.
Thereby, it can restrict | limit that the switching valve body 54 carries out reverse rotation too much, can prevent separating the switching valve body 54 from the nozzle valve seat 51 of the fine nozzle 7, and is hold | maintained in the 1st opening-and-closing position P1.

At the first opening / closing position P1, the high-pressure fluid is introduced from the liquid introduction channel 21 into the liquid introduction chamber 6. Since the high-pressure liquid flows into the jet nozzle 8 on the other side from the liquid introduction flow path 21 located at the center between the nozzles 7 and 8, the high-pressure liquid affects the switching valve body 54 that closes the fine bubble nozzle 7 on the one side. As a result, the switching valve body 54 is not separated from the fine bubble nozzle 7 nozzle valve seat 51. The jet nozzle 8 ejects high-pressure liquid into the bathtub Y (see FIGS. 20 and 21).
In the composite nozzle unit X, when high-pressure liquid is introduced into the liquid introduction chamber 6, the high-pressure liquid is introduced from the liquid introduction hole 53B of the switching valve holder 53 into the spring recess 54A of the switching valve body 54. 2, the switching valve body 54 is pressed against the nozzle valve seat 51 by the spring force of the switching valve spring 55 and the pressure of the high-pressure liquid, so that even if the high-pressure liquid introduced into the liquid introduction chamber 6 is affected, It is not separated from the nozzle valve seat 51 of the nozzle 7 (not extracted from the fine bubble nozzle 8).
Further, the switching valve body 54 is disposed on the liquid introduction flow path 6, and the nozzle valve of the fine bubble nozzle 7 from the liquid introduction chamber 6 which is the flow direction of the high-pressure liquid (the direction of flow from the liquid introduction chamber 6 to the jet nozzle 8). Since it is in contact with the seat 51, it is not separated from the nozzle valve seat 51 of the fine bubble nozzle 7 by the flow of high-pressure liquid.

  Further, the liquid in the bathtub Y flows into the liquid suction passage 9 through the liquid flow recess 66 of the composite nozzle unit X and the suction small holes 68, 68,..., And passes through the liquid suction passage 9 to the outside of the composite nozzle unit X. Drained.

  In the composite unit X, the unit main body 1 has the fine bubble nozzle 7, the jet nozzle 8 and the liquid suction passage 9 integrally, so that a single nozzle mounting hole 100 is formed in the bathtub Y, and the unit main body By simply attaching 1 to the nozzle attachment hole 100, the fine bubble nozzle 7, the jet nozzle 8, and the liquid suction passage 9 can be installed in the bathtub Y, and the number of installation steps for the nozzles and the like can be reduced.

<Bathtub system>
Next, the bathtub system Z will be described with reference to FIGS.
In FIG. 26, the same reference numerals as those in FIGS. 1 to 25 denote the same members and the same configurations, and thus detailed description thereof will be omitted.

  26, the bathtub system Z includes a bathtub Y, a composite nozzle unit X, a plurality of pipelines 111 to 114, a circulation pump 121, a gas-liquid dissolution tank 131, a first direction switching valve 141, a second direction switching valve 142, an operation. A panel 151 and a control device 152.

  The bathtub Y is disposed in a bathroom (not shown) and stores liquid (hot water, water, etc.).

The composite nozzle unit X has the same configuration as that described with reference to FIGS. 1 to 25, and includes a liquid introduction chamber 6, a fine bubble nozzle 7, a jet nozzle 8, and a liquid suction flow path 9. The unit main body 1, nozzle switching valve 2, the valve rotation shaft 3 and the operation bundle 5. The composite nozzle unit X switches to the first opening / closing position P1 or the second opening / closing position P2.
The composite nozzle unit X is attached to the inner wall Y1 (nozzle attachment hole 100) of the bathtub Y, as described with reference to FIGS.

The liquid suction pipe 111 sucks and takes out the liquid in the bathtub Y through the composite nozzle unit X. As shown in FIG. 20, the liquid suction conduit 111 is attached to the liquid drain boss 19 of the composite nozzle unit X and communicates with the liquid drain passage 22.
Thereby, in the composite nozzle unit X, the liquid suction channel 9 is connected to the liquid suction channel 111.

The liquid introduction conduit 112 introduces an air-dissolved liquid or a high-pressure liquid into the composite nozzle unit X. As shown in FIG. 20, the liquid introduction conduit 112 is attached to the liquid introduction boss 18 of the composite nozzle unit X and is connected to the liquid introduction passage 21.
Thereby, in the composite nozzle unit X, the liquid introduction chamber 6 is connected to the liquid introduction conduit 112.

As shown in FIG. 26, the first branch circulation pipe 113 is branched from a branch point 111 </ b> A of the liquid suction pipe 111 and is connected to a junction 112 </ b> A of the liquid introduction pipe 112.
As shown in FIG. 26, the second branch circulation conduit 114 is branched from a branch point 111A of the liquid suction conduit 111 and connected to a confluence 112A of the liquid introduction conduit 112.

  The circulation pump 121 is disposed in the liquid suction pipe 111. The circulation pump 121 sucks the liquid in the bathtub Y through the composite nozzle unit X (liquid suction passage 9) and the liquid suction pipe 111. The circulation pump 121 compresses the sucked liquid and discharges the high-pressure liquid to the branch point 111 </ b> A side of the liquid suction pipe 111.

  The gas-liquid dissolution tank 131 dissolves air into a high-pressure liquid. The gas-liquid dissolution tank 131 is disposed in the second branch circulation conduit 114 as shown in FIG. The gas-liquid dissolution tank 131 has an air valve 131A for introducing air into the inside.

The first direction switching valve 141 is disposed at a branch point 111A of the liquid suction pipe 111 as shown in FIG. The first direction switching valve 141 switches to the connection between the liquid suction pipe 111 and the first branch circulation pipe 113 or the connection between the liquid suction pipe 111 and the second branch circulation pipe 114.
As shown in FIG. 26, the second direction switching valve 142 is disposed at the junction 112 </ b> A of the liquid introduction conduit 112. The second direction switching valve 142 switches to the connection between the first branch circulation line 113 and the liquid introduction line 112 or the connection between the second branch circulation line 114 and the liquid introduction line 112.

The operation panel 151 is disposed in a bathroom (not shown), and selects a fine bubble mode or a jet mode by a bather's operation.
The fine bubble mode is a mode in which fine bubbles are generated in the liquid in the bathtub Y, and the jet mode is a mode in which high pressure liquid is ejected into the bathtub Y.

  The control device 152 controls the entire bathtub system Z and executes the fine bubble mode or the jet mode. The control device 152 is connected to the circulation pump 121 and controls driving / stopping of the circulation pump 121. The control device 152 is connected to the first and second directional switching valves 141 and 142 and controls switching of the directional switching valves 141 and 142. The control device 151 is connected to the operation panel 151.

<Operation of bathtub system>
(1) Fine bubble mode The bather operates the operation panel 151 to select the fine bubble mode. The operation panel 151 outputs a fine bubble signal to the control device 152.
Further, as described in FIGS. 22 to 25, the bather holds the operation hand 5 of the composite nozzle unit X and rotates the operation handle 5 in the forward direction, so that the switching valve body 54 (nozzle switching valve 2). ) Is switched from the first opening / closing position P1 to the second opening / closing position P2.
Thereby, in the composite nozzle unit X, the switching valve element 54 (nozzle switching valve 2) closes the jet nozzle unit 8 from the liquid introduction chamber 6 and communicates the fine bubble nozzle 7 to the liquid introduction chamber 6.

When the fine bubble signal is input, the control device 152 drives the circulation pump 121. The control device 152 outputs a fine bubble switching signal to the first and second directional switching valves 141 and 142.
The first direction switching valve 141 connects the liquid suction conduit 111 and the second branch circulation conduit 114 based on the fine bubble switching signal.
The second direction switching valve 142 connects the second branch circulation conduit 114 and the liquid introduction conduit 112 based on the fine bubble switching signal (see FIG. 26).

As the circulation pump 121 is driven, the liquid in the bathtub Y flows through the liquid flow recess 66 (operation bundle 5) of the composite nozzle unit X and the suction small holes 68, 68,... As shown in FIG. It is sucked into the road 9.
As shown in FIGS. 20 and 26, the liquid that has flowed into (suctioned into) the liquid suction channel 9 sucks air from the air suction hole 23 of the composite nozzle unit X and passes through the liquid suction pipe 111 to the circulation pump 121. Inhaled.
The circulation pump 121 compresses the sucked liquid and discharges the high-pressure liquid to the branch point 111 </ b> A side of the liquid suction pipe 111.

The pressurized fluid discharged from the circulation pump 121 is introduced into the gas-liquid dissolution tank 131 through the first direction switching valve 141 and the second branch circulation pipe 114. Air is introduced into the gas-liquid dissolution tank 131 through the air valve 131A.
The gas-liquid dissolution tank 131 dissolves air into a high-pressure liquid to generate an air-soluble liquid (a high-pressure air-soluble liquid).

  The air-dissolved liquid flows out from the gas-liquid dissolution tank 131 to the second branch circulation conduit 114 and is introduced into the liquid introduction chamber 6 of the composite nozzle unit X through the second direction switching valve 142 and the liquid introduction conduit 112 (see FIG. 20 and FIG. 24).

Subsequently, as shown in FIG. 24, the air-dissolved liquid flows into the fine bubble nozzle 7 from the liquid introduction chamber 6, generates fine bubbles at the fine bubble nozzle 7, and is ejected into the liquid in the bathtub Y.
The air-dissolved liquid introduced into the liquid introduction chamber 6 is introduced from the liquid introduction hole 53 </ b> B of the switching valve holder 53 into the spring housing recess 54 </ b> A and acts on the switching valve body 54. As a result, the switching valve body 54 is pressed against the nozzle valve seat 52 of the jet nozzle 8 by the spring force of the switching valve spring 55 and the pressure of the air-dissolved liquid, and is not separated from the nozzle valve seat 52 of the jet nozzle 8. The nozzle 8 is closed from the liquid introduction chamber 6.

(2) Jet mode The bather operates the operation panel 151. Select the jet mode. The operation panel 151 outputs a jet signal to the control device 152.
Similarly, as described with reference to FIGS. 22 to 25, the bather holds the operation bundle 5 of the composite nozzle unit X and reversely rotates the operation handle 5, whereby the switching valve body 54 (nozzle switching valve 2). Is switched from the second opening / closing position P2 to the first opening / closing position P1.
Thereby, the switching valve body 54 (nozzle switching valve 2) of the composite nozzle unit X closes the fine bubble nozzle 7 from the liquid introduction chamber 6, and communicates the jet nozzle 6 with the liquid introduction chamber 6 (FIGS. 5 and 6). 20 and 22).

When the jet signal is input, the control device 152 drives the circulation pump 121. The control device 152 outputs a jet switching signal to the first and second direction switching valves 141 and 142.
The first direction switching valve 141 communicates the liquid suction conduit 111 and the first branch circulation conduit 113 based on the jet signal.
The second direction switching valve 142 connects the first branch circulation conduit 113 and the liquid introduction conduit 112 based on the jet signal.

As the circulation pump 121 is driven, the liquid in the bathtub Y flows through the liquid flow recess 66 (operation bundle 5) of each of the suction small holes 68, 68,... 9 is sucked.
As shown in FIGS. 20 and 26, the liquid that has flowed into (suctioned into) the liquid suction channel 9 sucks air from the air suction hole 23 of the composite nozzle unit X and passes through the liquid suction pipe 111 to the circulation pump 121. Inhaled.
The circulation pump 121 compresses the sucked liquid and discharges the high-pressure liquid to the branch point 111 </ b> A side of the liquid suction pipe 111.

  The high-pressure liquid discharged from the circulation pump is introduced into the liquid introduction chamber 6 of the composite nozzle unit X through the first direction switching valve 141, the first branch circulation line 113, the second direction switching valve 142, and the liquid introduction line 112. (See FIGS. 6, 20, and 22).

Subsequently, as shown in FIGS. 6 and 22, the high-pressure liquid flows into the jet nozzle 8 from the liquid introduction chamber 6 and is ejected from the jet nozzle 8 into the bathtub Y.
Further, as shown in FIG. 20, the high-pressure liquid introduced into the liquid introduction chamber 6 is introduced from the liquid introduction hole 53 </ b> B of the switching valve holder 53 into the spring accommodating recess 54 </ b> A and acts on the switching valve body 54. Thereby, the switching valve body 54 is pressed against the nozzle valve seat 51 of the fine bubble nozzle 7 by the spring force of the switching valve spring 55 and the pressure of the high pressure liquid, and the switching valve body 54 is moved from the nozzle valve seat 51 of the fine bubble nozzle 7. The fine bubble nozzle 7 is reliably closed from the liquid introduction chamber 6 without being separated.

In the combined nozzle unit X according to the present invention, in the bathtub mounting procedure, before mounting to the bathtub Y, the nozzle / valve assembly A is assembled, and the unit fixing seat 10 and the nozzle / valve assembly A are mounted to the bathtub Y. Although described, it is not limited to this.
For example, the unit fixing nut 11 is mounted in the unit fixing seat 10 without assembling the nozzle / valve assembly A. The unit fixing nut 10 and the unit fixing nut 11 are attached to the bathtub Y by rotating the unit fixing nut 11 and sandwiching the inner wall Y1 of the bathtub Y by the fixing flange portions 16 and 26. Subsequently, the nozzle switching valve 2 is assembled to the nozzle unit body 12 (see FIG. 17), and the nozzle switching valve 2, the nozzle unit body 12 and the presser nut 13 are mounted in the unit fixing nut 11. It is also possible to assemble the nozzle unit body 12 and the presser nut 13 into the unit fixing nut 11.

  In the composite nozzle unit X according to the present invention, the interval between the fixed flange portions 16 and 26 can be adjusted by rotating the unit fixing nut 11 forward / reversely with respect to the unit fixing seat 10. Thereby, the unit fixing seat 10 and the unit fixing nut 11 can sandwich the inner wall Y1 according to the thickness dimension of the inner wall Y1 of the bathtub Y.

The composite nozzle unit X according to the present invention rotates the operation bundle 5, the valve rotation shaft 3, and the switching valve holder 53 (switching valve body 54), thereby opening the nozzle switching valve 2 in the first opening / closing position P1 or the second opening / closing position. Although the configuration for switching to the position P2 has been described, the present invention is not limited to this. For example, the nozzle unit body 12 is pivotally supported with respect to the unit fixing seat 10, and the valve rotation shaft 3 is fixed to the nozzle unit body 12 so as not to rotate. Further, the switching valve holder 53 is fixed to the unit fixing seat 10 so as not to rotate. Thereby, the nozzle valve seats 51 and 52 of the nozzles 7 and 8 of the nozzle unit body 12 are rotated with respect to the switching valve body 54 by forward rotation or reverse rotation of the operation bundle 5. It is possible to adopt a configuration in which the nozzle switching valve 2) is switched to the first opening / closing position P1 or the second opening / closing position P2.
In addition, the operating handle 5 and the switching valve holder 53 (the switching valve body 54 and the switching valve spring 55) are not rotated, but are linearly moved in the orthogonal direction I of the circular plate portions 33 and 34, thereby switching the switching valve body 54. The switch valve body 54 (nozzle switching valve 2) can be switched to the first opening / closing position P1 or the second opening / closing position P2 by contacting the nozzle valve seats 51 and 52 of the nozzles 7 and 8 with each other. .

  In the composite nozzle unit X of the present invention, the unit fixing seat 10, the unit fixing nut 11, the nozzle unit body 12, the nozzle switching valve 2 (switching valve holder 53, switching valve body 54), the valve rotating shaft 3 and the operation bundle 5 are The synthetic resin (for example, modified polyphenylene ether resin) is preferably used. Thereby, the weight reduction of the composite nozzle unit X can be achieved, and corrosion by liquid can be prevented.

  The present invention is suitable for a nozzle that ejects fine bubbles or high-pressure liquid into a bath liquid.

X Composite nozzle unit 1 Unit body 2 Nozzle switching valve 5 Operation handle 7 Fine bubble nozzle 8 Jet nozzle 9 Liquid suction passage 51 Nozzle valve seat 52 Nozzle valve seat 53 Switching valve holder 54 Switching valve body 55 Switching valve spring (coy spring)
P1 first opening / closing position P2 second opening / closing position

Claims (3)

A liquid introduction chamber for introducing an air-dissolved liquid or high-pressure liquid in which air is dissolved; a fine-bubble nozzle that generates fine bubbles by ejecting the air-dissolved liquid to a bathtub; and a jet nozzle that ejects the high-pressure liquid to the bathtub ,
The fine bubble nozzle is closed to switch to a first opening / closing position where the jet nozzle communicates with the liquid introduction chamber, or the jet nozzle is closed to switch to a second opening / closing position where the fine bubble nozzle communicates with the liquid introduction chamber. A composite nozzle unit,
A unit main body integrally having the liquid introduction chamber, the fine bubble nozzle and the jet nozzle, and attached to the bathtub;
An operation handle disposed in the bathtub;
A nozzle valve seat formed inside each nozzle and opening to the liquid introduction chamber, and a nozzle switching valve having a switching valve body disposed in the liquid introduction chamber,
The switching valve body is
Based on the operation of the operation handle, it is switched to the first opening / closing position or the second opening / closing position,
In the first opening / closing position, the liquid introduction chamber is brought into contact with the nozzle valve seat of the fine bubble nozzle, and the fine bubble nozzle is closed from the liquid introduction chamber,
The composite nozzle unit, wherein the jet nozzle is closed from the liquid introduction chamber by contacting the nozzle valve seat of the jet nozzle from the liquid introduction chamber at the second opening / closing position. The unit body is
2. The composite nozzle unit according to claim 1, wherein the composite nozzle unit has a liquid suction channel integrally and discharges the liquid in the bathtub through the liquid suction channel. A tub for storing liquid;
A liquid introduction chamber for introducing an air-dissolved liquid or high-pressure liquid in which air is dissolved, a fine-bubble nozzle for ejecting the air-dissolved liquid into the bathtub and generating fine bubbles, a jet nozzle for ejecting the high-pressure liquid into the bathtub, and a liquid A first opening / closing position that includes a suction flow path and closes the fine bubble nozzle to connect the jet nozzle to the liquid introduction chamber, or closes the jet nozzle to connect the fine bubble nozzle to the liquid introduction chamber. A composite nozzle unit that switches to a second opening / closing position;
A liquid suction line connected to the liquid suction path of the composite nozzle unit ;
A liquid introduction conduit connected to the liquid introduction chamber of the composite nozzle unit;
A first branch circulation pipe branched from a branch point of the liquid suction pipe and connected to a junction of the liquid introduction pipe;
A second branch circulation pipe branched from the branch point of the liquid suction pipe and connected to the junction of the liquid introduction pipe;
A circulation pump that is disposed in the liquid suction conduit, sucks the liquid in the bathtub through the liquid suction passage and the liquid suction conduit, and discharges high-pressure liquid to the branch point side of the liquid suction conduit;
A gas-liquid dissolution tank that is disposed in the second branch circulation line and dissolves air in the high-pressure liquid;
A first direction which is arranged at the branch point of the liquid suction pipe and switches to the connection of the liquid suction pipe and the first branch circulation pipe or the connection of the liquid suction pipe and the second branch circulation pipe A switching valve;
A second direction which is arranged at the confluence of the liquid introduction conduit and switches to the connection of the first branch circulation conduit and the liquid introduction conduit or the connection of the second branch circulation conduit and the liquid introduction conduit. A switching valve;
A control device that controls the switching of the first and second directional control valves and the drive of the circulation pump to execute the fine bubble mode or the jet mode;
The control device drives the circulation pump and controls switching of the first and second directional control valves in the fine bubble mode, and controls the liquid suction passage, the second branch circulation conduit, and the liquid. The introduction pipes are connected to each other, and in the jet mode, the circulation pump is driven, and the switching of the first and second directional control valves is controlled to control the liquid suction pipe and the first branch circulation pipe. A bathtub system for interconnecting a passage and the liquid introduction conduit,
The composite nozzle unit is
A unit main body integrally having the liquid introduction chamber, the fine bubble nozzle, the jet nozzle, and the liquid suction flow path, and attached to the bathtub;
An operation handle disposed in the bathtub;
A nozzle switching valve having a nozzle valve seat formed inside each nozzle and opening to the liquid introduction chamber, and a switching valve body disposed in the liquid introduction chamber,
The switching valve body is
Based on the operation of the operation handle, it is switched to the first opening / closing position or the second opening / closing position,
In the first opening / closing position, the liquid introduction chamber is brought into contact with the nozzle valve seat of the fine bubble nozzle, and the fine bubble nozzle is closed from the liquid introduction chamber,
The bathtub system, wherein the jet nozzle is brought into contact with a nozzle valve seat of the jet nozzle from the liquid introduction chamber at the second opening / closing position, and the jet nozzle is closed from the liquid introduction chamber.

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