Microbubble generator and toilet seat device equipped with the same

Abstract

Provided are a fine bubble generator in which water containing fine bubbles can be used at a plurality of locations, and a toilet seat device including the fine bubble generator. 【Solution means】In the branch fitting 33 of the present invention, a UFB nozzle 78 and a branch fitting body 75 are provided. The UFB nozzle 78 has a hollow portion 87 through which water can pass and a collision portion 88 that generates fine bubbles in the passing water. The branch fitting body 75 has a housing portion 91 that houses the UFB nozzle 78, a thin flow path portion 92, a main flow path portion 93, and a hollow portion 97 that communicate with the housing portion 91 and through which water can pass. The branch fitting body 75 has a thin flow path portion 92 that communicates with the hollow portion 87, a main flow path portion 93 having a larger cross-sectional area than the thin flow path portion 92, and a hollow portion 97 as a branch flow path portion that branches the water flowing in from the main flow path portion 93 into a plurality of streams. The branch fitting body 75 is configured to be formed of metal.

Description

Technical Field

[0001] The present invention relates to a fine bubble generator and a toilet seat device including the fine bubble generator.

Background Art

[0002] Conventionally, for example, in a flushing toilet facility, a technique for improving the cleaning ability in the toilet by generating fine bubbles in the water supplied into the toilet bowl is known. For example, in Patent Document 1, a water absorption joint (3) and a discharge joint (5) are attached to a cleaning water supply pipe (L) for supplying cleaning water to a toilet bowl (10), the cleaning water is branched from the water absorption joint (3), and water containing fine bubbles is generated from the cleaning water by a UFB water generation device (2) as a fine bubble-containing water generation device, and the water containing the fine bubbles is returned from the discharge joint (5) to the cleaning water supply pipe (L) through a discharge pipe (6), whereby a fine bubble-containing water supply system for using the water containing the fine bubbles as the cleaning water of the toilet bowl (10) is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, since the cleaning water supply pipe (L) is once branched by the water absorption joint (3), the UFB water generation device (2) is attached to the branched water absorption pipe (4), and the water containing fine bubbles is merged from the discharge joint (5) into the cleaning water supply pipe (L) through the discharge pipe (6), it was not possible to use the water containing fine bubbles other than the water for cleaning the toilet bowl (10). In recent years, there are toilet seat devices that supply water other than the storage tank that stores the water supplied to the toilet seat, such as a configuration that discharges water locally or a configuration that discharges water inside the toilet bowl, and there has been a demand for a toilet seat device that enables the use of water containing fine bubbles for these waters.

[0005] Therefore, in view of the above circumstances, an object of the present invention is to provide a fine bubble generator in which water containing fine bubbles can be used at a plurality of locations, such as a toilet seat and a storage tank, and a toilet seat device provided with the fine bubble generator.

Means for Solving the Problems

[0006] The fine bubble generator of the present invention includes a first flow path member and a second flow path member. The first flow path member has a first flow path through which water can pass and a fine bubble generating means for generating fine bubbles in the passing water. The second flow path member has a housing portion for housing the first flow path member and a second flow path that communicates with the housing portion and through which water can pass. The second flow path has a thin flow path portion that communicates with the first flow path, a main flow path portion having a larger cross-sectional area than the thin flow path portion, and a branched flow path portion for branching the water flowing in from the main flow path portion into a plurality of branches. The second flow path member is formed of metal. , a holding means is provided upstream of the first flow path member in the housing portion, which contacts the first flow path member to hold the first flow path member in the housing portion. The cross-sectional area inside the housing portion is larger than the cross-sectional area of the fine flow path portion. The holding means has a main body formed in an annular shape and a plurality of protruding portions protruding outward from the outer periphery of the main body and fitting into the inner periphery of the housing portion. It is characterized by this.

Effects of the Invention

[0007] According to the present invention, by branching the water containing fine bubbles in the branched flow path portion, the water containing fine bubbles can be used at a plurality of locations.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0009] Hereinafter, a preferred embodiment of the toilet seat device of the present invention will be described with reference to the accompanying drawings.

[0010] Figures 1 to 15 show an embodiment of the toilet seat device 10 of the present invention. Figure 1 shows a configuration example of a flushing toilet device 100 in a toilet room S as a flushing toilet facility. Figure 2 is a perspective view of the main body 11, the toilet seat 12, and the toilet seat lid 13 of the toilet seat device 10 of the flushing toilet device 100 as seen from below (the bottom surface side). 1 is a toilet, which has a concave bowl portion 2 with an open upper surface for receiving excrement, and this bowl portion 2 forms the inner surface of the toilet 1. Note that the bowl portion 2 is the toilet bowl of the toilet 1. Also, 12 is a toilet seat, which has a central opening 12A and is substantially O-shaped in plan view. 13 is a toilet seat lid, which covers the toilet seat 12 and is configured to cover the toilet seat 12 in an openable and closable manner. The main body 11 of the toilet seat device 10 is detachably fixed to the upper surface of the rear part 3 of the toilet 1 (see Figure 3) located at the rear of the toilet 1. Therefore, the flushing toilet device 100 of the present embodiment is configured to include the toilet seat device 10, the toilet 1, and a storage tank (not shown).

[0011] The main body 11 includes a hollow casing 15 that serves as the main body portion. This casing 15 is composed of a main body lower surface portion 16 that is attached and fixed to the upper surface of the rear part 3 of the toilet bowl 1, and a casing upper portion 17 that covers the upper surface of the main body lower surface portion 16 and has an open lower surface, forming an outer shell member made of synthetic resin. A toilet seat 12 and a toilet seat lid 13, both made of synthetic resin, are rotatably attached to the casing 15. As shown in FIG. 1, with the toilet seat lid 13 opened and the toilet seat 12 tilted toward the toilet bowl 1, the user can place their buttocks on the toilet seat 12 and sit down.

[0012] On the lower surface of the toilet seat 12, a plurality of convex toilet seat legs 18 that directly contact the upper surface of the toilet bowl 1 when the toilet seat 12 in the use position is tilted toward the toilet bowl 1 are arranged at intervals. In this embodiment, as shown in FIG. 2, they are arranged at four locations on the left and right sides of the front and the left and right sides of the rear, but this is just an example, and the present invention is not limited to this. One of the toilet seat legs 18 incorporates a mechanical seating switch 19 that serves as seating detection means. When the toilet seat leg 18 contacts and is pushed into the toilet bowl 1, and the seating switch 19 is turned ON, it can be detected that the user has seated on the toilet seat 12. In this embodiment, as shown in FIG. 2, the seating switch 19 is provided on one of the toilet seat legs 18 on the left or right side of the front center, but this is just an example, and the present invention is not limited to this.

[0013] 21 is a main body operation portion made of synthetic resin provided on the side portion of the casing 15. The main body operation portion 21 is provided with various operation buttons including cleaning buttons such as a buttocks button and a bidet button, and a stop button. The user's operations are input through these operation buttons. The main body operation portion 21 is also provided with display lamps such as a power lamp, a deodorizing lamp, an energy-saving lamp, and a toilet seat lamp. The operating states of each part of the toilet seat device 10 are notified to the user according to the display forms of these display lamps.

[0014] A so-called movable cleaning nozzle 25 is provided at the front lower part of the casing 15. The cleaning nozzle 25 corresponding to the nozzle device has a cylindrical shape linearly extending along the front-rear direction of the main body 11 and is arranged to be reciprocally movable along the front-rear direction of the main body 11. One or a plurality of water discharge parts 66 (see FIG. 5) for discharging water as a cleaning liquid are provided on the peripheral surface of the tip of the cleaning nozzle 25, and when the cleaning nozzle 25 is advanced to a position protruding from below the toilet seat 12, water is configured to be ejected without waste toward the local part of the user sitting on the toilet seat 12. Further, on the main body lower surface part 16 forming the bottom of the casing 15, in order to protect the cleaning nozzle 25 housed in the casing 15 when the cleaning nozzle 25 is retracted to a position below the toilet seat 12, a convex nozzle guard 26 is integrally formed toward the lower side of the main body 11. The material of the cleaning nozzle 25 is preferably made of stainless steel to maintain cleanliness, but other materials may also be used. Further, in the present embodiment, as the water discharge part 66, a buttocks cleaning water discharge port 66a for ejecting water to the first local part of the user and a bidet cleaning water discharge port 66b for ejecting water to a second local part different from the first local part of the user are provided, and these buttocks cleaning water discharge port 66a and bidet cleaning water discharge port 66b are configured to be provided on the same cleaning nozzle 25. Note that the configuration of the cleaning nozzle 25 is an example, and the buttocks cleaning water discharge port 66a and the bidet cleaning water discharge port 66b may be provided on dedicated cleaning nozzles 25 respectively, and a configuration in which a plurality of cleaning nozzles 25 move respectively may also be used.

[0015] As a water supply path, a stop valve WV pre-installed in the toilet room S has a branch fitting 33 attached thereto for branching the water flowing in from the stop valve WV to the side of the toilet seat 12 and the side of a storage tank (not shown) for storing water for supplying and washing the toilet bowl. This branch fitting 33 is composed of a three-way joint, and each joint is connected to the stop valve WV, a tank water supply hose R for supplying water to the storage tank, and a water supply hose 32, respectively. Further, a main body water inlet 31 is provided at the rear side portion of the casing 15, and by connecting the water supply hose 32 to the main body water inlet 31, the stop valve WV and the main body water inlet 31 communicate with each other, and the water from the stop valve WV is guided from the main body water inlet 31 to the toilet seat 12 via the branch fitting 33 and the water supply hose 32. Therefore, in the present embodiment, the toilet seat device 10 is constituted by the main body 11, the toilet seat 12, the toilet seat lid 13, the water supply hose 32, and the branch fitting 33.

[0016] As shown in FIG. 2, on the lower surface portion 16 of the main body, a mounting recess 41 is provided to be recessed upward. This mounting recess 41 includes a front edge portion 41A protruding rearward such that a central portion 41T is located rearward compared to the left and right sides, and left and right edge portions 41L and 41R formed from the left and right end portions of the front edge portion 41A toward the rear side. A rear opening 42 is provided between the rear ends of these left and right edge portions 41L and 41R. As shown in FIG. 3, a fixing plate 43 for fixing the main body 11 is fixed to the upper surface of the rear portion 3 of the toilet bowl. Aligning the rear opening 42 of the mounting recess 41 with the fixing plate 43 and sliding the main body 11 rearward to fit the fixing plate 43 into the mounting recess 41, the main body 11 is fixed to the rear portion 3 of the toilet bowl. Conversely, by sliding the main body 11 forward and removing the fixing plate 43 from the mounting recess 41, the main body 11 can be removed from the rear portion 3 of the toilet bowl. Thus, the rear portion 3 of the toilet bowl is the mounting portion of the toilet 1 for mounting the main body 11.

[0017] A deodorizing device 51 is incorporated in the casing 15 to reduce and remove the odor in the toilet 1. For this purpose, an air inlet 52 is provided on the front lower surface of the casing 15 facing the upper surface of the toilet 1, and a deodorizing passage (not shown) is provided between the air inlet 52 and an exhaust port 53 provided at the rear of the upper portion 17 of the casing 15. A deodorizing fan and a deodorizing unit are provided in the middle of this deodorizing passage.

[0018] Figure 4 shows an enlarged top view of the main body 11 with the upper part 17 of the casing removed. Referring to Figure 4, the configuration of the flow path 51 through which the water flowing in from the main body water inlet 31 flows will be described. The flow path 51 is mainly formed by the main body water inlet 31, a water stop mechanism 52, a pressure reducing mechanism 53, a switching valve 55, a branch portion 56, a jet portion 57, a heating unit 58, a nozzle assembly 59, and an air pump 60. Also, as will be described later, the flow path 51 has a first flow path 51-1 and a second flow path 51-2. The second flow path 51-2 has a third flow path 51-3 and a fourth flow path 51-4, and the fourth flow path 51-4 has a fifth flow path 51-5 and a sixth flow path 51-6. Specifically, the flow path 51 branches into a first flow path 51-1 that is a flow path leading to the storage tank side by a branch fitting 33 and a second flow path 51-2 that is a flow path leading to the toilet seat 12. The second flow path 51-2 is disposed in the toilet seat 12 from the main body water inlet 31 via a water supply hose 32, and branches into a third flow path 51-3 and a fourth flow path 51-4 at the branch portion 56. The fourth flow path 51-4 is formed to branch into a fifth flow path 51-5 and a sixth flow path 51-6 by a solenoid valve 95 of the nozzle assembly 59.

[0019] The water stop mechanism 52 starts / stops the inflow of water from the main body water inlet 31 into the second flow path 51-2 in the toilet seat 12. In this embodiment, it is composed of an electromagnetic valve and can be turned ON / OFF by an electric signal. The pressure reducing mechanism 53 reduces and stabilizes the pressure of the passing water to a predetermined pressure, such as 0.1 to 0.15 MPa, and is provided so that the water with the stabilized water pressure can be supplied to the second flow path 51-2. In this embodiment, the main body water inlet 31, the water stop mechanism 52, and the pressure reducing mechanism 53 are integrally formed to form a water guiding unit 110 that is unitized. The water guiding unit 110 is composed of the aforementioned electromagnetic valve. Therefore, the water stop mechanism 52 and the pressure reducing mechanism 53 can be miniaturized, and the attachment and replacement of the main body water inlet 31, the water stop mechanism 52, and the pressure reducing mechanism 53 to the main body 11 can be facilitated. Therefore, the water guiding unit 110 also has the function as a valve device. Note that this is just an example, and the water guiding unit 110 may be composed of, for example, a motor-driven valve, that is, an electric valve whose power source is an electric valve such as an electromagnetic valve or a motor-driven valve. Also, the main body water inlet 31, the water stop mechanism 52, and the pressure reducing mechanism 53 may be formed separately, or the water guiding unit 110 may be formed by only one of the water stop mechanism 52 and the pressure reducing mechanism 53.

[0020] The switching valve 55 suppresses the water pressure of the water flowing through the flow path 51-2 to a predetermined value or less, and has an inflow portion 55A into which water flows, a delivery portion 55B that delivers water, an overflow drainage portion 55C, and a drain pipe 55D connected to a drain hole 16A provided in the lower surface portion 16 of the main body. Here, the case where water flows into the switching valve 55 from the inflow portion 55A will be described. When the pressure of the flowing-in water is equal to or less than a predetermined value, an overflow drainage valve (not shown) built in the switching valve 55 is not opened, and the flowing-in water is directly delivered from the delivery portion 55B. On the other hand, when the pressure of the flowing-in water exceeds a predetermined value, the overflow drainage valve is opened, and part of the water and gas flowing into the switching valve 55 is delivered from the overflow drainage portion 55C to the drain pipe 55D and discharged into the bowl portion 2 of the toilet 1 from the drain hole 16A. After that, when the water pressure becomes equal to or less than a predetermined value, the overflow drainage valve is closed, and the water flowing in from the inflow portion 55A is configured to be directly delivered from the delivery portion 55B again. Note that the switching valve 55 may be configured such that the overflow drainage valve is opened not only when the pressure of the water flowing into the switching valve 55 exceeds a predetermined value, but also when the flow rate of the water exceeds a predetermined value.

[0021] The branch portion 56 branches into a third flow path 51-3 leading to the ejection portion 57 and a fourth flow path 51-4 leading to the nozzle assembly 59, and selectively sends the water flowing into the branch portion 56 to either the third flow path 51-3 or the fourth flow path 51-4. In the present embodiment, the branch portion 56 is constituted by a solenoid valve, and has an inflow portion 56A into which water flows, a first ejection portion 56B that sends water to the third flow path 51-3, a second ejection portion 56C that sends water to the fourth flow path 51-4, and a branch portion main body 56D. The branch portion main body 56D is configured to be able to selectively open / close the first ejection portion 56B or the second ejection portion 56C by an electric signal, and the water flowing from the inflow portion 56A into the branch portion main body 56D is configured to be sent to the third flow path 51-3 or the fourth flow path 51-4 through the opened first ejection portion 56B or second ejection portion 56C. Therefore, the branch portion 56 has the function of a valve device. Note that the branch portion 56 may be constituted by an electric valve, and the first ejection portion 56B and the second ejection portion 56C may be configured such that only one of them is opened / closed, or both may be opened / closed simultaneously.

[0022] The ejection portion 57 discharges the water flowing in from the third flow path 51-3 into the bowl portion 2 of the toilet 1, attaches the water to the inner wall which is the inner surface of the bowl portion 2, and improves the removal of dirt during toilet cleaning, and has the function as a water discharge port. The ejection portion 57 of the present embodiment has an atomization function of ejecting the flowing-in water as mist M in a mist state, and by atomizing the water, the mist M from the ejection portion 57 can be attached to a wide range of the inner wall of the bowl portion 2. Note that in the present embodiment, the ejection portion 57 is fixed, but the ejection portion 57 may be configured to be swingable to spray water over an even wider range.

[0023] The heating unit 58 heats the water sent to the nozzle assembly 59 to raise the water temperature. In the present embodiment, the heating unit 58 has a heater 58a (see FIG. 14), and is configured such that the heater 58a heats the water while the water passes through the heating unit 58, instantaneously raising the water temperature.

[0024] FIG. 5 is a schematic cross-sectional view of the nozzle assembly 59 of the present embodiment. Referring to this figure, the configuration of the nozzle assembly 59 will be described. The nozzle assembly 59 includes a nozzle main body 62, a water supply cylinder 63, a nozzle motor 64, a water supply cylinder motor 65, a nozzle holder 67, and the like. The nozzle main body 62 constitutes the main body of the nozzle assembly 59 and is formed in a cylindrical shape extending linearly. A water supply cylinder storage portion 62a extending linearly along the axial direction of the nozzle main body 62 is provided at the central portion in the radial direction of the nozzle main body 62. The nozzle main body 62 is configured to be inclined such that the base end portion of the nozzle main body 62 is upward and the tip end side is downward with respect to the horizontal, and thus the nozzle main body 62 reciprocates with an inclination such that the base end portion is upward and the tip end side is downward along the front-rear direction.

[0025] The tip end surface of the nozzle main body 62 is closed. Further, a water discharge portion 66 is provided on the circumferential surface of the tip end portion of the nozzle main body 62, in this case, the upper surface facing the buttocks of the user placed on the toilet seat 12. In the present embodiment, two water discharge portions 66 are provided, namely, an anus washing water discharge port 66a and a bidet washing water discharge port 66b. However, more than two discharge ports may be provided as the water discharge portion 66, or only one discharge port may be provided. The anus washing water discharge port 66a and the bidet washing water discharge port 66b communicate with the tip end portion of the water supply cylinder storage portion 62a, respectively.

[0026] As shown in FIG. 5, the water supply cylinder 63 is formed in a cylindrical shape with a smaller diameter than the water supply cylinder storage portion 62a, and is stored in the water supply cylinder storage portion 62a so as to be reciprocable back and forth along the axial direction. Water flows through the cylindrical water supply cylinder 63, and the water supply cylinder 63 forms a part of a fifth flow path 51-5 described later. The tip end surface of the water supply cylinder 63 is closed. Further, one water supply port 72 is provided on the circumferential surface of the tip end portion of the water supply cylinder 63, in this case, the upper surface facing the buttocks of the user placed on the toilet seat 15.

[0027] The nozzle motor 64 is an example of the nozzle moving means. By rotating the wheel 64a in the directions of arrow a1 and arrow a2, the nozzle main body 62 is reciprocally moved along the axial direction of the nozzle assembly 59, that is, the front-rear direction of the toilet seat device 10. As a result, the entire nozzle assembly 59 reciprocally moves in the directions of arrow A1 and arrow A2 along the front-rear direction of the toilet seat device 10.

[0028] The water supply cylinder motor 65 rotates the wheel 65a in the directions of arrow b1 and arrow b2 to reciprocally move the water supply cylinder 63 inside the nozzle main body 62 along the axial direction of the nozzle assembly 59, that is, the front-rear direction of the toilet seat device 10. As a result, inside the nozzle main body 62, the water supply cylinder 63 reciprocally moves in the directions of arrow B1 and arrow B2 along the front-rear direction of the toilet seat device 10.

[0029] As shown in FIG. 5, inside the base end portion of the nozzle main body 62, that is, the side opposite to the tip end portion, a movement restricting portion 68 having a diameter larger than that of the water supply cylinder storage portion 62a is provided. A tip side touch sensor 69 is provided on the tip end side of this movement restricting portion 68, and a base end side touch sensor 70 is provided on the base end side of the movement restricting portion 68. On the other hand, an annular movement restricting component 71 is fixed to the base end portion of the water supply cylinder 63. The movement restricting component 71 is movably housed within the movement restricting portion 68. In the present embodiment, the length L1 in the axial direction of the nozzle assembly 59 in the movement restricting portion 68 is formed to be substantially the same as the length L2 between the centers of the anus washing water outlet 66a and the bidet washing water outlet 66b. As shown in FIG. 5, when the water supply cylinder 63 is in the rearmost position, the water inlet 72 of the water supply cylinder 63 is positioned at the location of the anus washing water outlet 66a, and when the water supply cylinder 63 is in the foremost position, the water inlet 72 of the water supply cylinder 63 is positioned at the location of the bidet washing water outlet 66b.

[0030] The nozzle holder 67 holds the nozzle body 62 so that it can move in the front-rear direction. As shown in FIG. 5, the nozzle holder 67 is formed in a cylindrical shape with a diameter larger than the outer circumference of the nozzle body 62, and the nozzle body 62 is configured to slide along the inner wall 67a of the nozzle holder 67 and reciprocate. A nozzle cleaning port 67b is provided in the inner wall 67a, and water can be ejected onto the outer surface of the nozzle body 62. As shown in FIG. 6, in this embodiment, the nozzle cleaning port 67b is located facing the butt cleaning water discharge port 66a and the video cleaning water discharge port 66b. In the embodiment of FIG. 5, the nozzle cleaning port 67b is provided at the position of the inner wall 67a facing the butt cleaning water discharge port 66a and the video cleaning water discharge port 66b, respectively. The length L3 between the nozzle cleaning ports 67b is formed to be substantially the same as the length L2 between the centers of the butt cleaning water discharge port 66a and the video cleaning water discharge port 66b. Therefore, the dirt adhering to the periphery of the butt cleaning water discharge port 66a and the video cleaning water discharge port 66b can be efficiently removed by the water from the two nozzle cleaning ports 67b. Similar to the nozzle body 62, the nozzle holder 67 is also configured to be inclined with an angle such that the base end portion direction of the nozzle body 62 is upward and the tip end portion direction is downward with respect to the horizontal. The water ejected from the nozzle cleaning port 67b flows along the inner wall 67a and the outer surface of the nozzle body 62 toward the tip end portion direction of the nozzle body 62 and then flows into the bowl portion 2 of the toilet 1. Note that this configuration is an example, and the number and arrangement of the nozzle cleaning ports 67b are not limited to this configuration.

[0031] In the nozzle assembly 59, a fifth flow path 51-5 that leads from the water supply port 72 to the water discharge portion 66 through the water supply cylinder 63 and a sixth flow path 51-6 that leads to the nozzle cleaning port 67b through the nozzle holder 67 are formed. The electromagnetic valve 95 (see FIG. 14) branches the fourth flow path 51-4 into the fifth flow path 51-5 and the sixth flow path 51-6. Therefore, the electromagnetic valve 95 is configured to be able to select and send the water flowing into the electromagnetic valve 95 to the fifth flow path 51-5 or the sixth flow path 51-6 according to an electrical signal. Accordingly, the electromagnetic valve 95 has a function as a valve device. Note that the electromagnetic valve 95 may be configured as an electric valve.

[0032] The air pump 60 injects gas into the water supply cylinder 63 to make the water flowing in the water supply cylinder 63 contain bubbles. When the gas is injected and the water contains bubbles, the pressure in the water supply cylinder 63 rises. As a result, the pressure of the water flowing through the fifth flow path 51-5 increases, and the momentum of the water discharged from the anus washing water outlet 66a and the video washing water outlet 66b can be increased. The discharge port of the air pump 60 and the inside of the water supply cylinder 63 communicate with each other via a pipe (not shown), and this pipe is configured to be connected at a substantially right angle to the extending direction of the water supply cylinder 63. Therefore, when the air pump 60 operates, the gas from the air pump 60 is injected from a direction substantially perpendicular to the flow of the water in the water supply cylinder 63, and the gas can be efficiently injected into the water so that the water can contain bubbles. Therefore, the air pump 60 has a function as a bubble-containing means for making the water flowing in the water supply cylinder 63 contain bubbles.

[0033] FIG. 7 is a schematic cross-sectional view of the branch fitting 33 of the present embodiment. Referring to this figure, the branch fitting 33 generally includes a branch fitting body 75 as a three-way joint, a nut 76 and a nut retainer 77 disposed on the outer periphery of a joint 75a connected to a stop valve WV of the branch fitting body 75, a UFB nozzle 78 and a nozzle retainer 79 disposed in the joint 75a, and a resin packing 80 disposed at the end of the joint 75a. A part of the flow path 51 through which water flows is formed inside these branch fitting body 75, UFB nozzle 78, nozzle retainer 79, and packing 80. As shown in FIG. 7, the branch fitting 33 of the present embodiment is arranged coaxially in the order of the packing 80, the nozzle retainer 79, the UFB nozzle 78, and the branch fitting body 75 from the upstream of the flow path 51, and the respective parts are in close contact with each other so that water does not leak between the parts. Note that the branch fitting 33 of the present embodiment is formed in the branch fitting body 75 Housing portion 91, the UFB nozzle 78 with the seal member 81 attached and the nozzle retainer 79 are press-fitted in order, and the joint 75a and the stop valve WV are connected via the packing 80 by the nut 76, so that the UFB nozzle 78 and the nozzle retainer 79 areHousing portion It is held within 91. With such a configuration, the replacement of the UFB nozzle 78 can be facilitated. Note that this is just an example, and the present invention is not limited to this configuration.

[0034] First, the UFB nozzle 78 will be described. When a liquid such as water supplied from an external water source passes through the inside of the UFB nozzle 78 in the downstream direction of the flow path 51, fine bubbles containing ultrafine bubbles are generated in the liquid. Note that the UFB nozzle 78 of this embodiment is just an example. In addition to, or instead of, ultrafine bubbles, it may generate fine bubbles such as microbubbles (fine bubbles) or micronano bubbles, or it may generate ultrafine bubbles (nano bubbles). In this specification, in accordance with the classification based on the diameter of general bubbles, fine bubbles with a diameter of 1 μm to 100 μm are referred to as microbubbles, and fine bubbles with a diameter of several tens of nm to less than 1 μm are referred to as ultrafine bubbles.

[0035] Microbubbles themselves, such as microbubbles and ultra-fine bubbles, are negatively charged. Therefore, microbubbles do not combine with each other and have the function of adsorbing positively charged substances such as dirt. At this time, the surface tension of a liquid such as water containing the microbubbles decreases, improving the cleaning effect. Here, when the microbubbles are ultra-fine bubbles, since odor is also a positively charged substance, the odor can be adsorbed, improving the deodorizing effect. Also, when the microbubbles collapse on the surface of a solid such as dirt, an extremely minute jet flow is generated, further improving the cleaning effect. Incidentally, for example, the internal pressure of a microbubble with a diameter of 100 nm is, in calculation, a high pressure of approximately 30 atm (30 atmospheres). Also, because the specific surface area of microbubbles becomes extremely large, microbubbles also have the function of promoting chemical reactions at the interface by imparting fluidity. And when microbubbles are rapidly collapsed by a shock wave through self-collapse, energy is generated and free radicals and ozone are produced. By these free radicals and ozone, bacteria and viruses in the water containing the microbubbles can be attacked to perform sterilization and disinfection. This effect is more effective the smaller the diameter of the microbubbles. For example, ultra-fine bubble water of ozone is particularly effective.

[0036] Since ultra-fine bubbles have a fine particle size, they can penetrate into intricate parts and exhibit a cleaning effect of removing dirt on objects that cannot be completely removed by other microbubbles such as microbubbles. Also, ultra-fine bubbles have the property that their particle size is on the nano order, their buoyancy is small, their hydrophobicity is large, and they are difficult to dissolve in water, so they have a long residence time in the liquid.

[0037] As shown in FIGS. 7 to 9, the UFB nozzle 78 is formed, for example, in a cylindrical shape having a step on the outer peripheral surface. The UFB nozzle 78 has an inlet portion 85, an outlet portion 86, a hollow portion 87, and a collision portion 88. The inlet portion 85 and the outlet portion 86 are formed, for example, in a cylindrical shape. The inlet portion 85 is a portion through which water flowing from the outside to the inside of the UFB nozzle 78 passes. The water that has passed through the hollow portion 81 of the UFB lower case 76 is introduced into the UFB nozzle 78 through the inlet portion 85. The outlet portion 86 is a portion through which water flowing out from the inside to the outside of the UFB nozzle 78 passes. The inner diameter of the outlet portion 86 is smaller than the inner diameter of the inlet portion 85. The water that has flowed into the UFB nozzle 78 flows into a later-described thin flow path portion 92 of the branch fitting body 75 from the outlet portion 86.

[0038] The hollow portion 87 is provided inside the UFB nozzle 78, connects the inlet portion 85 and the outlet portion 86, and is formed so that a liquid such as water can pass through. The hollow portion 87 includes a throttle portion 87a and a straight portion 87b. The throttle portion 87a and the straight portion 87b are provided over the entire circumference of the inner peripheral surface of the UFB nozzle 78. The throttle portion 87a is provided on the inflow side, that is, the upstream side of the UFB nozzle 78. The throttle portion 87a is connected to the inlet portion 85 and is provided between the inlet portion 85 and the outlet portion 86. The throttle portion 87a is formed so as to gradually decrease the cross-sectional area, that is, the inner diameter of the hollow portion 87 from the inlet portion 85 to a middle portion in the extending direction of the UFB nozzle 78. In the present embodiment, the throttle portion 87a is formed in a so-called truncated conical tapered tubular shape in which the cross-sectional area, that is, the inner diameter of the hollow portion 87 continuously and gradually decreases. Note that the throttle portion 87a may be configured to gradually decrease the cross-sectional area of the hollow portion 87 in a stepped manner. Further, the throttle portion 87a may be integrally formed with the UFB nozzle 78 or may be a separate body.

[0039] The straight portion 87b is provided on the downstream side of the throttle portion 87a. The straight portion 87b is connected to the outlet portion 86. The straight portion 87b is formed in a cylindrical shape, that is, a so-called straight tubular shape, in which the inner diameter does not change, that is, the cross-sectional area of the flow path 43, that is, the area through which the liquid can pass does not change. The inner diameter of the straight portion 87b is set to be substantially the same as the minimum inner diameter of the throttle portion 87a. In the present embodiment, the inner diameter of the straight portion 87b is set to be, for example, approximately 3 mm.

[0040] The collision portion 88 is for generating fine bubbles in the liquid passing through the hollow portion 87 by locally reducing the cross-sectional area of the hollow portion 87. The ratio of the cross-sectional area of the collision portion 88 to the cross-sectional area of the hollow portion 87 is configured to be settable to about 25% to 45%. As shown in FIG. 9, the collision portion 88 is provided near the downstream end of the UFB nozzle 78 and at least a part of it is provided in the straight portion 87b. The collision portion 88 is integrally formed with the UFB nozzle 78 by injection molding a synthetic resin material, for example. Note that the collision portion 88 is not limited to being integrally formed with the UFB nozzle 78 and may be formed separately.

[0041] As shown in FIG. 10, the collision portion 88 partitions the hollow portion 87 into a plurality of, in the case of FIG. 10, three, in the radial direction with respect to the center of the hollow portion 87 along the direction in which water flows through the hollow portion 87. That is, the hollow portion 87 is configured to be partitioned into three hollow portions 87d when passing through the collision portion 88. The collision portion 88 is composed of, for example, three protruding portions 89 formed in a rod shape and protruding from the inner peripheral surface of the straight portion 87b into the hollow portion 87. In the present embodiment, the protruding portion 89 protrudes from the inner peripheral surface of the straight portion 87b toward the center direction in the cross-section of the hollow portion 87. And each protruding portion 89 is integrally formed in a substantially Y shape with their respective tips connected.

[0042] The plurality of protrusions 89 are arranged at equal intervals from each other in the circumferential direction of the cross-section of the hollow portion 87. Note that the plurality of protrusions 89 are not limited to the configuration of being spaced at equal intervals, and may have a configuration of being spaced at unequal intervals. Further, the area of the gap formed between each of the protrusions 89 is the minimum cross-sectional area through which water can pass in the fine bubble generating means 54. Note that, as shown in FIG. 11, the plurality of protrusions 89 can be four or more. That is, the hollow portion 87 can be configured to be partitioned into four or more by the plurality of protrusions 89. In the example of FIG. 11, by the plurality of protrusions 89, the collision portion 88 is formed in a substantially cross shape as a whole, for example. In this case, when passing through the collision portion 60, the hollow portion 87 is configured to be partitioned into four hollow portions 87b.

[0043] As shown in FIG. 12, the protrusion 89 has an upstream side wall portion 89a, a diameter-expanded portion 89b, and a downstream side wall portion 89c. The upstream side wall portion 89a constitutes the upstream end portion of the protrusion 89. The longitudinal cross-sectional shape of the upstream side wall portion 89a is formed in a so-called bullet-shaped curved surface shape that protrudes toward the upstream side, which is the direction opposite to the direction in which water flows in the hollow portion 87, for example. The longitudinal direction means the direction along the direction in which water flows in the hollow portion 87. The width direction means the direction orthogonal to the direction along the direction in which water flows in the hollow portion 87.

[0044] The longitudinal cross-sectional shape of the upstream side wall portion 89a may be a triangular shape that tapers toward the upstream side. The diameter-expanded portion 89b is connected to the upstream side wall portion 89a and is formed so as to expand in diameter substantially linearly from the upstream side to the downstream side. The diameter-expanded portion 89b is not limited to the configuration of expanding in diameter linearly, and may have a configuration of expanding in diameter in a curved manner. That is, the cross-sectional shape of the protrusion 89 is such that the cross-sectional shape on the upstream side with respect to the direction in which water flows in the hollow portion 87 is smaller than the cross-sectional shape on the downstream side. And the longitudinal cross-sectional shape of the protrusion 89 changes smoothly with respect to the direction in which water flows in the hollow portion 87.

[0045] The downstream side wall portion 89c is connected to the diameter-expanded portion 89b and constitutes the downstream side end portion of the protruding portion 89. The cross-sectional shape of the downstream side wall portion 89c in the longitudinal direction is formed, for example, in a substantially rectangular shape. The downstream end face of the downstream side wall portion 89c is located on the same plane as the downstream end face of the UFB nozzle 78. That is, the downstream side surface of the protruding portion 89 is configured to be flush with the downstream side surface of the UFB nozzle 78. Also, regarding only the shape of the downstream side end portion of the protruding portion 89, the dimension of the downstream side wall portion 89c in the longitudinal direction is smaller than the dimension of the downstream side wall portion 89c in the width direction.

[0046] Here, in the cross-section of the protruding portion 89, when the dimension L4 of the protruding portion 89 in the longitudinal direction is made smaller than the dimension W in the width direction, the angle of the surface of the diameter-expanded portion 89b facing the water flowing through the hollow portion 87 becomes larger, and the flow path resistance of the protruding portion 89 with respect to the water flowing through the hollow portion 87 increases, which may lead to a decrease in the flow rate. Therefore, in the present embodiment, as shown in FIG. 12, the protruding portion 89 is configured such that the dimension L4 in the longitudinal direction is larger than the dimension W in the width direction in the cross-section of the protruding portion 89, suppressing the flow path resistance of the protruding portion 89 with respect to the water flowing through the hollow portion 87 and increasing the flow rate. In the present embodiment, the ratio of the dimension L4 in the longitudinal direction to the dimension W in the width direction of the protruding portion 89 is set, for example, to about 3:2. The dimension L4 in the longitudinal direction of the protruding portion 89 is set, for example, to about 0.7 mm to 1.1 mm, and the dimension W in the width direction of the protruding portion 89 is set, for example, to about 0.5 mm to 0.7 mm. However, this is only an example, and the present invention is not limited thereto.

[0047] When water flows into the upstream side of the UFB nozzle 78, the flow path cross-sectional area is constricted in the throttle portion 87a formed so as to gradually decrease the inner diameter. Based on the so-called Bernoulli's theorem in fluid dynamics, the flow velocity is increased and cavitation due to pressure reduction occurs. Then, the high-speed flow collides with the collision portion 88, and fine bubbles are generated by the shear force acting thereon and the negative pressure generated in the negative pressure region formed near the downstream end face of the collision portion 88, for example, at -1.0 MPa or less. As a result, the UFB nozzle 78 can deposit a large amount of air dissolved in the water passing through the UFB nozzle 78 as fine bubbles, and supply fine bubble water containing a larger amount of fine bubbles than before passing through the UFB nozzle 78.

[0048] Returning to FIG. 7 for explanation, the branch fitting body 75 is made of metal and is formed in a substantially T-shape. It has a substantially cylindrical joint 75a connected to the water stop plug WV, a substantially cylindrical joint 75b that extends substantially linearly with respect to the joint 75a and is connected to the tank water supply hose R, a substantially cylindrical joint 75c that extends substantially perpendicular to the joint 75a and is connected to the water supply hose 32, and a hollow main body portion 75d to which the joints 75a, 75b, and 75c are connected. The joint 75a has a housing portion 91 that houses the UFB nozzle 78 and the nozzle retainer 79, a thin flow path portion 92 that is a part of the flow path 51 and communicates with the hollow portion 87 of the UFB nozzle 78, a main flow path portion 93 that is a part of the flow path 51 and communicates with the thin flow path portion 92, and a groove portion 94 for the nut retainer 77. The joint 75b has a flow path 51-1 that is a part of the flow path 51 and guides water to the tank water supply hose R. The joint 75c has a flow path 51-2 that is a part of the flow path 51 and guides water to the water supply hose 32. The main body portion 75d has a hollow portion 97 that is a part of the flow path 51, communicates with the main flow path portion 93, the flow path 51-1, and the flow path 51-2, and guides the water flowing in from the main flow path portion 93 to the flow path 51-1 and the flow path 51-2.

[0049] The housing portion 91 houses the UFB nozzle 78 and the nozzle retainer 79 so that the flow path 51 is formed. The UFB nozzle 78 and the nozzle retainer 79 are arranged coaxially and have an outer shape substantially the same as the shape in which they fit. Between the outer peripheral surface of the UFB nozzle 78 and Housing portion the inner peripheral surface of 91, a seal member 81 is provided. The seal member 81 is composed of, for example, an O-ring made of synthetic resin. And between the outer peripheral surface of the UFB nozzle 78 and Housing portion the inner peripheral surface of 91, the seal member 81 is pressed, and the UFB nozzle 78 and Housing portion 91 are connected in a watertight state.

[0050] The fine flow path portion 92 is formed between the housing portion 91 and the main flow path portion 93, and guides the water flowing in from the outlet portion 86 of the UFB nozzle 78 to the main flow path portion 93. It is formed so as to communicate with these housing portion 91 and main flow path portion 93. In the present embodiment, the fine flow path portion 92 is formed in a columnar shape with a cross-sectional shape substantially the same as the hollow portion 87 in the straight portion 87b of the UFB nozzle 78, but the present invention is not limited to this.

[0051] The main flow path portion 93 guides the water flowing in from the fine flow path portion 92 to the hollow portion 97 in the main body portion 75d. In the present embodiment, the cross-sectional area of the main flow path portion 93 is substantially the same as the cross-sectional areas of the hollow portion 97, the flow path 51-1 formed in the joint 75b which is a part of the flow path 51, and the flow path 51-2 formed in the joint 75c which is a part of the flow path 51, so that the water is smoothly guided from the main flow path portion 93 to the hollow portion 97, the flow path 51-1, and the flow path 51-2. Also, the cross-sectional area of the main flow path portion 93 is formed to be larger than the cross-sectional area of the fine flow path portion 92. When the water flowing in from the fine flow path portion 92 to the main flow path portion 93 flows toward the downstream side of the flow path 51, the surrounding of this water is decompressed and becomes a negative pressure, so that the gas dissolved in this water becomes fine bubbles by cavitation, and the fine bubbles dissolved in this water are further subdivided, so that fine bubbles are generated in the water and the number of fine bubbles increases.

[0052] In the present embodiment, the length L of the fine flow path portion 92S is the length L from the outlet of the narrow channel portion 92 until it branches off in the hollow portion 97 within the main body portion 75d M , that is, so as to be shorter than the length obtained by adding the length of the radius of the joint 75b to the length of the main channel portion 93 (L S < L M ). Therefore, the length of the flow path until the fine bubbles generated in the collision portion 88 and the main channel portion 93 of the UFB nozzle 78 branch off in the hollow portion 97 can be ensured, and the occurrence of a flow rate difference between the amount of water guided to the flow path 51-1 and the amount of water guided to the flow path 51-2 is suppressed.

[0053] The groove portion 94 is for fitting the nut retainer 77 and is formed on the outer periphery of the joint 75a. The groove portion 94 of the present embodiment is formed in a concave shape, the groove width is approximately the same as the diameter of the nut retainer 77, and the depth of the groove is formed to be approximately the same as the radius of the nut retainer 77, but this is an example. The groove portion 94 is provided at a position where the length L from the groove portion 94 to the connection portion between the joint 75a and the main body portion 75d on the outer periphery of the joint 75a J is longer than the height L of the nut 76 N so that the nut retainer 77 can be fitted into the groove portion 94 with the joint 75a inserted deep into the nut 76.

[0054] In this embodiment, a UFB nozzle 78 as a fine bubble generating means is provided in a branch fitting 33 attached to a water stop valve WV. Since no pressure reducing mechanism is provided in the branch fitting 33, a high water pressure is applied to the hollow portion 87 of the UFB nozzle 78. However, it was difficult to form all of the branch fittings 33 out of metal and form a collision portion 88 inside the branch fitting 33. Therefore, in this embodiment, the branch fitting 33 is made of metal and a metal housing portion 91 is disposed outside the UFB nozzle 78, suppressing deformation of the UFB nozzle 78 and improving strength and durability. Also, metal parts such as the branch fitting 33 have the problem that it is difficult to form them into a shape that holds the UFB nozzle 78 inside the housing portion 91 because they are straightly removed from the mold during manufacturing. Therefore, in this embodiment, the UFB nozzle 78 is held inside the housing portion 91 by a nozzle retaining member 79.

[0055] FIG. 13 is a perspective view of the nozzle retaining member 79. Referring to this figure, the nozzle retaining member 79 holds the UFB nozzle 78 inside the housing portion 91 and is made of a resin such as polyacetal (POM) or polypropylene (PP), for example. The nozzle retaining member 79 is mainly composed of a retaining main body 79-1 formed in an annular shape and a plurality of protruding portions 79-2, 79-2,... protruding outward from the outer periphery of the retaining main body 79-1, and has a hollow portion 96 which is a part of the flow path 51 at the central portion of the retaining main body 79-1.

[0056] The retaining main body 79-1 contacts the end portion on the inlet portion 85 side of the UFB nozzle 78 and holds the UFB nozzle 78 Housing portion in the 91. The retaining main body 79-1 of this embodiment is formed to be substantially the same as the outer diameter of the inlet portion 85. Also, the protruding portions 79-2, 79-2,... fit with the inner periphery of the housing portion 91 and hold the nozzle retaining member 79 Housing portion in the 91. The protruding portion 79-2 of this embodiment is a wedge shape formed such that the upstream side is higher than the downstream side with respect to the flow path 51, and the height of the upstream side of this protruding portion 79-2 is from the outer periphery of the retaining main body 79-1 Housing portion It is formed to be slightly larger than the length up to the inner circumference of 91. With such a configuration, it facilitates the press-fitting of the nozzle retainer 79 into the housing portion 91 and also makes it easier for the protruding portions 79-2, 79-2... to fit onto the inner circumference of the housing portion 91. The hollow portion 96 is configured such that its cross-sectional area is larger than that of the hollow portion 87 on the inlet portion 85 side so as not to impede the flow of water from the water stop plug WV. Note that without providing the protruding portions 79-2, 79-2..., the retainer main body 79-1 is formed in a frustum shape with a hollow portion 96 formed in the center, the downstream side of the retainer main body 79-1 is made substantially the same as the outer diameter of the inlet portion 85 of the UFB nozzle 78, and the upstream side of the retainer main body 79-1 is Housing portion configured to have an outer diameter slightly larger than the inner circumference of 91 so that the outer circumference of the retainer main body 79-1 fits onto the inner circumference of the housing portion 91.

[0057] The packing 80 is sandwiched between the joint 75a of the branch fitting main body 75 and the water stop plug WV to block the gap between the joint 75a and the water stop plug WV. The packing 80 in this embodiment is made of resin and is formed in an annular shape having substantially the same outer diameter as the end portion of the joint 75a. The inner diameter of the packing 80 is configured such that its cross-sectional area is larger than that of the hollow portion 87 on the inlet portion 85 side of the UFB nozzle 78, similar to the hollow portion 96, so as not to impede the flow of water from the water stop plug WV.

[0058] The nut retainer 77 engages with the inner circumference on one end side of the nut 76 when the nut 76 is positioned at the end portion of the joint 75a to prevent the nut 76 from coming off the joint 75a. The nut retainer 77 in this embodiment is made of a metal such as SUS, for example, has a circular cross-section, and is formed in a substantially C shape in plan view, and is attached to the joint 75a by being fitted into the groove portion 94.

[0059] Nut 76 connects joint 75a and stop valve WV. Although nut 76 of this embodiment is made of metal, this is just an example. Nut 76 has a substantially cylindrical shape, and an internal female thread portion 76-1 that can be screwed into the threaded portion of stop valve WV is formed on the inner surface, and an engaging portion 76-2 that engages with nut retainer 77 is provided on one end side of the inner surface. Then, packing 80 is disposed at the end of joint 75a, and the joint of stop valve WV is abutted against the other surface side of packing 80, and nut 76 is screwed into the threaded portion of stop valve WV, whereby stop valve WV and joint 75a are connected and branch fitting 33 is attached to stop valve WV.

[0060] Next, the electrical configuration of the toilet seat device 10 will be described with reference to FIG. 13. 101 is a control unit that electrically controls each part of toilet seat device 10, and includes a microcomputer (microcontroller), storage means 102 such as a memory capable of reading and writing various information and data, timing means 103 for performing timing related to time and hour, and drive elements of each part. The input port of control unit 101 is electrically connected to main body operation unit 21, seating sensor 19, tip side touch sensor 69 and base end side touch sensor 70 of nozzle assembly 59, and toilet seat lid opening / closing detection means 104, respectively. Also, the output port of control unit 101 is electrically connected to water stop mechanism 52, branch portion 56, heater 58a of heating unit 58, air pump 60, nozzle motor 64, water supply cylinder motor 65 and solenoid valve 95 of nozzle assembly 59, respectively.

[0061] Toilet seat lid opening / closing detection means 104 detects the opening and closing of toilet seat lid 13, is provided on toilet seat lid 13, and is provided near the shaft rotatably attached to toilet seat 12. Here, toilet seat lid opening / closing detection means 104 may be of any detection method such as optical, mechanical, magnetic, etc., as long as it can output a detection signal corresponding to the opening and closing of toilet seat lid 13.

[0062] The control unit 101 receives each detection signal from the seating sensor 19, the toilet lid opening / closing detection means 104, the tip-side touch sensor 69, and the base-end side touch sensor 70, and the operation signal from the main body operation unit 21, and outputs control signals to the water stop mechanism 52, the branch unit 56, the heater 58a, the air pump 60, the nozzle motor 64, the water supply cylinder motor 65, and the electromagnetic valve 95 at a predetermined timing based on the time measurement from the time measurement means 103, respectively. Such functions are realized by the control unit 101 reading the programs and settings stored in the storage means 102 as a storage medium.

[0063] FIG. 15 is a flowing water path diagram showing the main path through which water flows in the washlet device 100 of the present embodiment. While referring to this figure, the operation of the toilet seat device 10 regarding the flow path 51, which is the water path in the toilet seat device 10 in particular, will be described in detail.

[0064] The water that has flowed into the branch fitting 33 from the water stop valve WV flows into the hollow portion 87 of the UFB nozzle 78 through the packing 80 and the hollow portion 96 of the nozzle retainer 79. When water flows into the upstream side of the hollow portion 87 of the UFB nozzle 78, the flow path cross-sectional area is constricted at the throttle portion 87a formed so as to gradually decrease the inner diameter, so that the flow velocity of the water is increased based on the so-called Bernoulli's theorem of fluid dynamics and cavitation occurs due to the surrounding of the water being depressurized. Then, due to the shear force acting when the high-speed flow of the water collides with the collision portion 88 and the negative pressure generated in the negative pressure region formed near the downstream end face of the collision portion 88, for example, -1.0 MPa or less, the gas contained in this water is subdivided and fine bubbles are generated. As a result, the UFB nozzle 78 precipitates a large amount of the air dissolved in the water passing through the UFB nozzle 78 as fine bubbles, and supplies water containing a larger amount of fine bubbles than before passing through the UFB nozzle 78. In the present embodiment, for example, when water with a water pressure of 0.15 MPa flows into the UFB nozzle 78, the UFB is contained in the water passing through the UFB nozzle 78 at 10 5 / ml or more.

[0065] The water flowing out from the UFB nozzle 78 flows into the main flow path portion 93 through the thin flow path portion 92 of the branch fitting body 75. When water flows into the main flow path portion 93, the surrounding of this water is depressurized to a negative pressure, so that the fine bubbles dissolved in this water are further subdivided by cavitation, and the gas dissolved in this water becomes fine bubbles by cavitation. Then, when water flows into the hollow portion 97 of the main body portion 75d from the main flow path portion 93, the water branches into the flow path 51-1 and the flow path 51-2 in the hollow portion 97. Therefore, the hollow portion 97 has a function as a branch flow path portion that branches the water flowing in from the main flow path portion 93 into a plurality of paths.

[0066] The water guided to the flow path 51-1 flows into the storage tank through the tank water supply hose R from the joint 75b and is stored therein. Thus, in the flushing toilet device 100 of the present embodiment, since water containing fine bubbles is supplied to the storage tank, the toilet 1 can be washed using the water containing the fine bubbles, improving the cleaning ability inside the toilet 1. Also, the water guided to the flow path 51-2 is supplied to the main body water supply port 31 through the water supply hose 32 from the joint 75c.

[0067] First, explaining the operation of the toilet seat device 10 in a state where the toilet seat lid 13 is closed, the control unit 101, based on the settings stored in the storage means 102 and the timing signal of the timing means 103, determines that a predetermined time, for example, 1 hour, has elapsed since the previous mist M was ejected and there is an interval during which water has not been ejected from the ejection portion 57. Then, the control unit controls the branch portion 56 to open the first delivery portion 56B, and also controls the water stop mechanism 52 to start the inflow of water into the flow path 51-2 in the toilet seat device 10.

[0068] The water that has flowed into the flow path 51-2 within the toilet seat device 10 passes through the water stop mechanism 52 and flows into the pressure reducing mechanism 53. While passing through the pressure reducing mechanism 53, the pressure of the water drops to a predetermined pressure and stabilizes at the said predetermined pressure. Then, the water flowing at the predetermined pressure flows into the switching valve 55 from the inflow portion 55A. Here, when the pressure of the water within the switching valve 55 is below a predetermined value, the water that has flowed in flows out from the delivery portion 55B and flows into the branch portion 56. On the other hand, for example, when the pressure of the water within the switching valve 55 exceeds the predetermined value, such as when a blockage occurs in the flow path 51 between the switching valve 55 and the branch portion 56, the overflow drain valve opens, and a part of the water and gas that have flowed into the switching valve 55 flows into the drain hole 16A through the drain pipe 55D from the overflow drain portion 55C and is discharged into the bowl portion 2 of the toilet 1.

[0069] The water that has flowed into the branch body 56D from the inflow portion 56A of the branch portion 56 flows into the third flow path 51-3 through the opened first delivery portion 56B. After that, the water that has flowed into the ejection portion 57 through the third flow path 51-3 is turned into a mist-like mist M at the ejection portion 57 and is ejected into the bowl portion 2 of the toilet 1. In this way, by discharging the water containing fine bubbles into the bowl portion 2, it is possible to wet the inner wall of the bowl portion 2 and make it difficult for dirt to adhere to the inner wall. Also, the water containing fine bubbles has an improved cleaning effect and can perform sterilization and disinfection, so the inner wall of the bowl portion 2 can be kept clean.

[0070] After that, when the control unit 101 determines that water has flowed into the flow path 51-2 for a predetermined time, such as one minute, based on the settings stored in the storage means 102 and the timing signal of the timing means 103, the control unit 101 controls the water stop mechanism 52 to stop the inflow of water into the flow path 51-2 in the toilet seat device 10, and controls the branch part 56 to close the first delivery part 56B. When water no longer flows from the main body water supply port 31 into the flow path 51-2 in the toilet seat device 10, the water no longer flows in the flow path 51-2 in the toilet seat device 10, and the ejection of the mist M from the ejection part 57 also stops. Thus, in the present embodiment, based on the settings stored in the storage means 102, the mist M is ejected from the ejection part 57 to the bowl part 2 for a predetermined time a predetermined number of times at predetermined intervals. Note that the user may be configured to be able to set, for example, by the main body operation part 21, the interval setting, the predetermined number of times setting, and the predetermined time setting for ejecting the mist M in the ejection of these mists M, that is, the mist M ejection method from the ejection part 57.

[0071] Further, when the control unit 101 determines, based on the settings stored in the storage means 102 and the timing signal of the timing means 103, that water has not been ejected from the nozzle cleaning port 67b for a predetermined period, such as one hour, the control unit 101 controls the branch part 56 to open the second delivery part 56C, controls the solenoid valve 95 so that the fourth flow path 51-4 is selected, and controls the water stop mechanism 52 to start the inflow of water into the flow path 51-2 in the toilet seat device 10.

[0072] The water that has flowed into the flow path 51-2 in the toilet seat device 10 passes through the water stop mechanism 52, the pressure reducing mechanism 53, and the switching valve 55 in sequence, flows into the branch part main body 56D from the inflow part 56A of the branch part 56, and flows out into the fourth flow path 51-4 through the opened second delivery part 56C. Then, although this water passes through the heating unit 58, since the heater 58a is OFF and not energized, the water is not heated at this time. The water that has passed through the heating unit 58 flows into the nozzle assembly 59 along the fourth flow path 51-4.

[0073] The water flowing into the solenoid valve 95 of the nozzle assembly 59 flows into the selected sixth flow path 51-6. The water flowing into the nozzle cleaning port 67b through the sixth flow path 51-6 is jetted from the nozzle cleaning port 67b toward the anus cleaning water outlet 66a and the video cleaning water outlet 66b, flows along the inner wall 67a and the outer surface of the nozzle main body portion 62 in the direction of the tip of the nozzle main body portion 62, and then flows down into the bowl portion 2 of the toilet 1. In this way, by jetting the water containing fine bubbles from the anus cleaning water outlet 66a and the video cleaning water outlet 66b, the dirt adhering to the periphery of the anus cleaning water outlet 66a and the video cleaning water outlet 66b is efficiently removed. At this time, the nozzle main body portion 62 may be configured to move in the front-rear direction, and the water containing fine bubbles is jetted onto the outer surface of the nozzle main body portion 62 to remove dirt over a wide range on the outer surface of the nozzle main body portion 62.

[0074] Thereafter, when the control unit 101 determines that water has flowed into the flow path 51-2 in the toilet seat device 10 for a predetermined time, such as one minute, based on the setting stored in the storage means 102 and the timing signal of the timing means 103, the control unit 101 controls the water stop mechanism 52 to stop the inflow of water into the flow path 51, and also controls the branch portion 56 to close the second delivery portion 56C. When water no longer flows from the main body water supply port 31 into the flow path 51-2 in the toilet seat device 10, the water no longer flows in the flow path 51-2 in the toilet seat device 10, and the jetting of water from the nozzle cleaning port 67b also stops. Thus, in this embodiment, based on the setting stored in the storage means 102, water is jetted from the nozzle cleaning port 67b toward the anus cleaning water outlet 66a and the video cleaning water outlet 66b for a predetermined time a predetermined number of times at predetermined intervals. Note that the setting of the predetermined number of times at predetermined intervals for the jetting of this water and the setting of the predetermined time for jetting the water from the nozzle cleaning port 67b may be configured to be set by the user, for example, using the main body operation unit 21.

[0075] Next, the operation of the toilet seat device 10 in the state where the toilet seat lid 13 is opened will be described. When the control unit 101 determines that the toilet seat lid 13 has changed from the closed state to the open state based on the detection signal of the toilet seat lid opening / closing detection means 104, the control unit 101 controls the branch section 56 to open the first delivery section 56B, and also controls the water stop mechanism 52 to start the inflow of water into the flow path 51-2 in the toilet seat device 10. The water that has flowed into the flow path 51-2 in the toilet seat device 10 passes through the water stop mechanism 52, the pressure reducing mechanism 53, the fine bubble generating means 54, the switching valve 55, and the branch section 56 in this order, flows into the ejection section 57 through the third flow path 51-3, is turned into a mist M in the ejection section 57, and is ejected into the bowl section 2 of the toilet 1. In this way, the water containing fine bubbles is discharged in advance into the bowl section 2 to wet the inner wall of the bowl section 2, making it difficult for dirt to adhere to the inner wall.

[0076] After that, when the control unit 101 determines, based on the setting stored in the storage means 102 and the timekeeping signal of the timekeeping means 103, that water has been allowed to flow into the flow path 51-2 in the toilet seat device 10 for a predetermined time, such as one minute, the control unit 101 controls the water stop mechanism 52 to stop the inflow of water into the flow path 51-2 in the toilet seat device 10, and also controls the branch section 56 to close the first delivery section 56B. When water no longer flows from the main body water supply port 31 into the flow path 51-2 in the toilet seat device 10, the water stops flowing in the flow path 51, and the ejection of the mist M from the ejection section 57 also stops.

[0077] Here, when the user sits on the toilet seat 12, the toilet seat leg portion 18 abuts against the toilet 1 and is pushed in, and the seating switch 19 is turned ON. When the control unit 101 receives the signal from the turned-ON seating switch 19, the control unit 101 controls to energize the heater 58a of the heating unit 58.

[0078] When the user selects and operates, for example, the "buttocks button" of the main body operation unit 21, an operation signal from the main body operation unit 21 is transmitted to the control unit 101. When receiving the operation signal, the control unit 101 drives and controls the nozzle motor 64 so that the nozzle main body 62 advances to the set position, and also drives and controls the water supply cylinder motor 65 so that the water supply cylinder 63 retreats until it reaches the retreat position and the base end side touch sensor 70 is turned on. Then, the control unit 101 controls the branch unit 56 to open the second delivery unit 56C, and controls the solenoid valve 95 so that the fifth flow path 51-5 is selected. After that, when the control unit 101 determines that the nozzle main body 62 has advanced to the set position and the water supply cylinder 63 has retreated to the retreat position based on the detection signal of the base end side touch sensor 70, it controls the water stop mechanism 52 to start the inflow of water into the flow path 51-2 in the toilet seat device 10, and also controls to drive the air pump 60.

[0079] The water flowing into the flow path 51-2 in the toilet seat device 10 passes through the water stop mechanism 52, the pressure reducing mechanism 53, and the switching valve 55 in sequence, flows into the branch unit main body 56D from the inflow unit 56A of the branch unit 56, and flows out to the fourth flow path 51-4 through the opened second delivery unit 56C. When this water flows into the heating unit 58, since the heater 58a is energized and ON, the heater 58a heats the water while the water passes through the heating unit 58, instantaneously raising the water temperature. The output setting of the heater 58a may be configured to be set by the user, for example, by the main body operation unit 21, and the water temperature after heating by the heater 58a may be configured to be adjustable. The water that has passed through the heating unit 58 flows into the nozzle assembly 59 along the fourth flow path 51-4.

[0080] The water flowing into the solenoid valve 95 of the nozzle assembly 59 flows into the selected fifth flow path 51-5 and then into the water supply cylinder 63. Here, when it is set to increase the momentum of the water discharged from the anus washing water discharge port 66a, a gas such as air is discharged from the air pump 60 into the water supply cylinder 63, and the gas is injected into the water flowing in the water supply cylinder 63 so that the water further contains bubbles, and the water pressure increases, thereby increasing the momentum of the water. In this way, the momentum of the water discharged from the water discharge part 66 can be adjusted. Note that the momentum of this water is adjusted by the control unit 101 controlling the air pump 60, but the setting of the momentum of the water may be configured to be set by the user, for example, by the main body operation unit 21. Further, the control unit 101 controls the air pump 60 to repeat ON and OFF at a short cycle, and performs rhythm cleaning that automatically repeats, at a short cycle, soft water discharge with a soft hitting water flow of only water without air injection and water discharge with a water flow with increased momentum of water with air injection.

[0081] Also, since the water supply cylinder 63 is in the retracted position and the position of the water inlet 72 of the water supply cylinder 63 is at the position of the anus washing water discharge port 66a of the water discharge part 66, the water that has passed through the water supply cylinder 63 is discharged from the anus washing water discharge port 66a through the water inlet 72.

[0082] After that, when the control unit 101 determines that water has flowed into the flow path 51-2 in the toilet seat device 10 for a predetermined time based on the setting stored in the storage means 102 and the timing signal of the timing means 103, the control unit 101 controls the air pump 60 to turn OFF, controls the water stop mechanism 52 to stop the inflow of water into the flow path 51-2 in the toilet seat device 10, and controls the branch part 56 to close the second delivery part 56C. When water no longer flows from the main body water inlet 31 into the flow path 51-2 in the toilet seat device 10, the water no longer flows in the flow path 51-2 in the toilet seat device 10, and the water discharge from the anus washing water discharge port 66a also stops. Then, the control unit 101 drives and controls the nozzle motor 64 so that the tip of the nozzle main body part 62 retreats to the storage position which is near the nozzle holder 67.

[0083] When the user selects and operates, for example, the "Video Button" on the main body operation unit 21, an operation signal from the main body operation unit 21 is transmitted to the control unit 101. When receiving the operation signal, the control unit 101 drives and controls the nozzle motor 64 so that the nozzle main body 62 moves forward to the set position, and also drives and controls the water supply cylinder motor 65 so that the water supply cylinder 63 moves forward until it reaches the forward position and the tip side touch sensor 69 turns ON. Then, the control unit 101 controls the branch unit 56 to open the second delivery unit 56C, and controls the solenoid valve 95 so that the fifth flow path 51-5 is selected. After that, when the control unit 101 determines that the nozzle main body 62 has moved forward to the set position and the water supply cylinder 63 has moved forward to the forward position based on the detection signal of the tip side touch sensor 69, the control unit 101 controls the water stop mechanism 52 to start the inflow of water into the flow path 51-2 in the toilet seat device 10.

[0084] The water flowing into the flow path 51-2 in the toilet seat device 10 passes through the water stop mechanism 52, the pressure reducing mechanism 53, and the switching valve 55 in sequence, flows into the branch unit main body 56D from the inflow unit 56A of the branch unit 56, and flows out to the fourth flow path 51-4 through the opened second delivery unit 56C. When this water flows into the heating unit 58, since the heater 58a is energized and ON, the heater 58a heats the water while the water passes through the heating unit 58, instantaneously raising the water temperature. The water that has passed through the heating unit 58 flows into the nozzle assembly 59 along the fourth flow path 51-4.

[0085] The water flowing into the solenoid valve 95 of the nozzle assembly 59 flows into the selected fifth flow path 51-5 and then into the water supply cylinder 63. Here, when it is set to increase the momentum of the water discharged from the video cleaning discharge port 66b, a gas such as air is discharged from the air pump 60 into the water supply cylinder 63, and the gas is injected into the water flowing in the water supply cylinder 63, causing the water to contain more bubbles. The increased water pressure increases the momentum of the water. Note that the momentum of this water is adjusted by the control unit 101 controlling the air pump 60, but the setting of the momentum of the water may be configured to be set by the user, for example, by the main body operation unit 21. Further, the control unit 101 controls the air pump 60 to repeat ON and OFF in a short cycle, and performs rhythm cleaning that automatically repeats, in a short cycle, soft water discharge with a soft impact of the water flow with only water without air injection and water discharge with an increased water flow momentum of the water with air injection.

[0086] Also, since the water supply cylinder 63 is in the forward position and the position of the water inlet 72 of the water supply cylinder 63 is at the position of the video cleaning discharge port 66b of the discharge section 66, the water that has passed through the water supply cylinder 63 is discharged from the video cleaning discharge port 66b through the water inlet 72.

[0087] After that, when the control unit 101 determines that water has flowed into the flow path 51-2 in the toilet seat device 10 for a predetermined time based on the setting stored in the storage means 102 and the timing signal of the timing means 103, the control unit 101 controls the air pump 60 to turn OFF, controls the water stop mechanism 52 to stop the inflow of water into the flow path 51-2 in the toilet seat device 10, and controls the branch section 56 to close the second delivery section 56C. When water no longer flows from the main body water inlet 31 into the flow path 51-2 in the toilet seat device 10, the water no longer flows in the flow path 51-2 in the toilet seat device 10, and the water discharge from the video cleaning discharge port 66b also stops. Then, the control unit 101 drives and controls the nozzle motor 64 so that the tip of the nozzle main body section 62 retreats to the storage position near the nozzle holder 67.

[0088] As described above, in the branch fitting 33 as the fine bubble generator of the present embodiment, a UFB nozzle 78 as a first flow path member and a branch fitting body 75 as a second flow path member are provided. The UFB nozzle 78 has a hollow portion 87 as a first flow path through which water can pass, and a collision portion 88 as a fine bubble generating means for generating fine bubbles in the passing water. The branch fitting body 75 has a housing portion 91 for housing the UFB nozzle 78, a thin flow path portion 92, a main flow path portion 93, and a hollow portion 97 as a second flow path through which water can pass and which communicates with the housing portion 91. The branch fitting body 75 having the thin flow path portion 92, the main flow path portion 93, and the hollow portion 97 as the second flow path has a thin flow path portion 92 communicating with the hollow portion 87, a main flow path portion 93 having a larger cross-sectional area than the thin flow path portion 92, and a hollow portion 97 as a branch flow path portion for branching the water flowing in from the main flow path portion 93 into a plurality of streams. The branch fitting body 75 is configured to be formed of metal.

[0089] With this configuration, by branching the water containing fine bubbles in the hollow portion 97, the water containing fine bubbles can be used at a plurality of locations, such as the toilet seat device 10 and the storage tank. Further, since the branch fitting body 75 is formed of metal, even if the branch fitting 33 is provided at a location where high-pressure water flows in, for example, when connected to a stop valve WV, the branch fitting 33 can contain fine bubbles in the water without any problem. In addition to generating fine bubbles in the water at the collision portion 88, when water flows from the thin flow path portion 92 into the main flow path portion 93, the fine bubbles dissolved in this water are further subdivided by cavitation, and the gas dissolved in this water becomes fine bubbles by cavitation, so that the number of fine bubbles contained in the water can be increased.

[0090] Further, in the branch fitting 33 of the present embodiment, a nozzle retaining member 79 as a retaining means for retaining the UFB nozzle 78 in the housing portion 91 is provided. Even if the branch fitting body 75 is made of metal, the UFB nozzle 78 can be retained in the housing portion 91.

[0091] Also, in the branch fitting 33 of the present embodiment, the nozzle retainer 79 has a hollow portion 96 as a third flow path through which water can pass, and the hollow portion 96 is configured to have a larger cross-sectional area than the hollow portion 87 of the UFB nozzle 78, so that the water flow from the upstream can be prevented from being obstructed.

[0092] Also, in the branch fitting 33 of the present embodiment, the cross-sectional area of the internal space of the housing portion 91 is larger than the cross-sectional area of the narrow flow path portion 92, and the outer periphery of the nozzle retainer 79 may be fitted to the inner periphery of the housing portion 96. By press-fitting the nozzle retainer 79 into the housing portion 96, the UFB nozzle 78 can be held in the housing portion 91 by the nozzle retainer 79.

[0093] Also, in the branch fitting 33 of the present embodiment, the cross-sectional area of the internal space of the housing portion 91 is larger than the cross-sectional area of the narrow flow path portion 92, and the nozzle retainer 79 is configured to have a plurality of protruding portions 79-2, 79-2,... that fit into the housing portion 91. By press-fitting the nozzle retainer 79 into the housing portion 96, the UFB nozzle 78 can be held in the housing portion 91 by the nozzle retainer 79.

[0094] Also, in the branch fitting 33 of the present embodiment, the length L of the narrow flow path portion 92 S is configured to be shorter than the length L from the connection portion of the narrow flow path portion 92 and the main flow path portion 93 to the center of the branched flow path in the main body portion 75d M so as to ensure the length of the flow path until the fine bubbles generated at the collision portion 88 of the UFB nozzle 78 or in the main flow path portion 93 branch in the hollow portion 97, and to suppress the occurrence of a flow rate difference between the amount of water led to the flow path 51-1 and the amount of water led to the flow path 51-2.

[0095] Also, in the branch fitting 33 of the present embodiment, the branch fitting 33 is a three-way joint, and the housing portion 91 is provided in the joint 75a connected to the water stop valve WV side as a water supply source. By supplying high-pressure water to the UFB nozzle 78, more air dissolved in the water can be precipitated as fine bubbles, more fine bubbles can be generated, and the concentration of the fine bubbles can be increased. Further, by branching the water containing fine bubbles in the hollow portion 97, the water containing fine bubbles can be used at a plurality of locations, namely, the toilet seat device 10 and the storage tank.

[0096] Also, the toilet seat device 10 of the present embodiment includes a branch fitting 33, and has a main body 11 as a toilet seat provided with a jetting portion 57 and a water discharging portion 66 as discharging portions for discharging water to the outside. The water containing fine bubbles can be used in the main body 11 of the toilet seat device 10.

[0097] Also, the toilet seat device 10 of the present embodiment has a nozzle assembly 59 as a nozzle provided with a water discharging port 66 for locally discharging water, such as the jetting portion 57 and the water discharging portion 66, and a jetting portion 57 as a water discharging port for discharging water inside the toilet bowl 1. The main body 11 has a branching portion 56 for branching the water flowing in from the branch fitting 33 to the nozzle assembly 59 or the jetting portion 57. The water containing fine bubbles can be used for cleaning inside the toilet bowl 1 and local cleaning.

[0098] Also, the toilet seat device 10 of the present embodiment may be configured such that the main body 11 has a UFB nozzle 78 as a fine bubble generating means. The fine bubbles contained in the water discharged from the water discharging portion 66 and the fine bubbles contained in the mist M jetted from the jetting portion 57 can be further subdivided, and the concentration of the fine bubbles can be increased.

[0099] As described above, the present invention is not limited to the present embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the main body 11 may be configured to have a UFB nozzle 78 as a fine bubble generating means. For example, the UFB nozzle 78 may be provided in the second flow path 51-2 in the toilet seat device 10. The fine bubbles contained in the water discharged from the water discharge part 66 or the fine bubbles contained in the mist M ejected from the ejection part 57 can be further subdivided, and the concentration of the fine bubbles can be increased. Further, the parts and numerical values used in the present embodiment may be variously modified without departing from the spirit of the present invention.

Explanation of Reference Numerals

[0100] 1 Toilet 10 Toilet seat device 11 Main body (toilet seat) 33 Branch fitting (fine bubble generator) 57 Ejection part (flush water outlet) 59 Nozzle assembly (nozzle) 66 Water discharge part (flush water outlet) 75 Branch fitting main body (second flow path member) 75a Joint 78 UFB nozzle (first flow path member) 79 Nozzle retainer (holding means) 79-1 Anti-drop main body (main body) 79-2 Protrusion 80 Packing 87 Hollow part (first flow path) 88 Collision part (fine bubble generating means) 91 Accommodation part 92 Fine flow path part (second flow path) 93 Main flow path part (second flow path) 96 Hollow part (third flow path) 97 Hollow part (second flow path, branch flow path part)

Claims

1. A first flow path member and a second flow path member are provided, the first flow path member has a first flow path through which water can pass and a microbubble generating means for generating microbubbles in the passing water, the second flow path member has a housing portion that houses the first flow path member, and a second flow path that communicates with the housing portion and allows water to pass through, the second flow path includes a narrow flow path portion communicating with the first flow path, a main flow path portion having a cross-sectional area larger than that of the narrow flow path portion, and a branch flow path portion that branches water flowing in from the main flow path portion into a plurality of flow paths, The second flow path member is formed of a metal, a holding means for holding the first flow path member in the storage portion by contacting the first flow path member, the holding means being disposed upstream of the first flow path member in the storage portion; The cross-sectional area of ​​the inside of the container is larger than the cross-sectional area of ​​the narrow channel portion, The holding means comprises a main body formed in a circular ring shape and a plurality of protrusions that protrude outward from the outer periphery of the main body and fit into the inner periphery of the accommodating portion.

2. the retaining means has a third flow passage through which water can pass; 2. The micro-bubble generator according to claim 1, wherein the third flow passage has a cross-sectional area larger than that of the first flow passage.

3. the protruding portion is wedge-shaped and is formed so that an upstream side is higher than a downstream side with respect to the third flow path, 3. The micro-bubble generator according to claim 2, wherein the height of the upstream side of the protrusion is greater than the length from the outer periphery of the main body to the inner periphery of the accommodating portion.

4. The packing is made of resin and formed into a circular shape. the third flow path, the first flow path, and the second flow path are in communication with each other, The fine-bubble generator according to claim 2, characterized in that the packing, the holding means, the first flow path member, and the second flow path member are arranged coaxially in this order from upstream of the third flow path, the first flow path, and the second flow path, and each part is in contact with each other so that water does not leak between the parts.

5. The microbubble generator is a three-way joint, The container is provided in a joint connected to a water supply source, The fine-bubble generator according to claim 4, characterized in that the first flow path member and the holding means are pressed into the storage section in sequence, and the water supply source and the fitting are connected via the gasket, thereby holding the first flow path member and the holding means within the storage section.

6. 2. The fine-bubble generator according to claim 1, wherein a length of the thin flow path section is shorter than a length from a connection between the thin flow path section and the main flow path section to a center of the branched flow path in the branch flow path section.

7. A toilet seat device comprising the fine bubble generator according to any one of claims 1 to 6, characterized in that the toilet seat device comprises a toilet seat provided with a release portion for releasing water to the outside.

8. The discharge portion has a nozzle provided with a water outlet for discharging water to the private parts, and a water outlet for discharging water into the inside of the toilet bowl, 8. The toilet seat device according to claim 7, wherein the toilet seat has a branching portion that branches the water flowing in from the fine bubble generator to the nozzle or the water outlet.

9. The toilet seat device according to claim 7, characterized in that the toilet seat has a microbubble generating means.

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