JP7417839B2 - Bubble generator and bubble bathtub equipped with the same - Google Patents

Description

The present invention relates to a bubble generator and a bubble bathtub equipped with the same.

BACKGROUND ART Conventionally, bubble generating devices used in bathtubs have been disclosed (for example, see Patent Documents 1 to 4). In the bathtubs disclosed in Patent Documents 1 to 4, a plurality of blowholes are provided at the bottom of the bathtub body, and bubbles are generated in the bathtub body through piping connected to the blowholes.

JP2019-157348A

However, depending on the specifications of the bathroom or bathtub, there may be restrictions on the installation space, such as a limitation on the thickness of the piping when installing the piping for the bubble generator on the back side of the bathtub body. In such a case, if pipes with small diameters are connected to each other up to the jet nozzle, the flow rate of bubbles ejected from each of the plurality of jet nozzles tends to vary.

As described above, it can be said that there is still room for improvement in generating bubbles at a desired flow rate while installing piping according to the installation conditions.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems, and to provide a bubble generator and a bubble bathtub equipped with the same, which can generate bubbles at a desired flow rate while installing piping according to installation conditions. Our goal is to provide the following.

In order to achieve the above object, the bubble generating device of the present invention is a bubble generating device that generates bubbles in a bathtub, and includes a main pipe for flowing gas, a pump for feeding gas into the main pipe, and a main pipe for supplying gas to the main pipe. a first pipe and a second pipe branching from the first pipe, a first branch pipe further branching from the first pipe and connected from the back side of the bottom to a blowhole provided at the bottom of the bathtub body; A second branch pipe further branches from the second pipe and is connected to a blowhole provided at the bottom of the bathtub body from the back side of the bottom, and the first pipe and the second pipe are connected to the It branches off from the main pipe before entering the space behind the bottom of the bathtub body.

Further, the bubble bathtub of the present invention includes the bubble generating device, and the bathtub body having a plurality of blowholes at the bottom to which the first branch pipe or the second branch pipe of the bubble generating device are connected. Equipped with.

According to the bubble generator and bubble bathtub of the present invention, bubbles can be generated at a desired flow rate while installing piping according to installation conditions.

Schematic diagram of a bathtub in an embodiment Plan view of the bathtub body in the embodiment Side view of the bathtub body in the embodiment Bottom view of the bathtub body in the embodiment Front view of the first joint part in the embodiment Side view of the first joint part in the embodiment Plan view of piping group in embodiment A plan view showing a state in which a base pipe and a branch pipe are connected to a connecting component in an embodiment. A vertical cross-sectional view showing the peripheral configuration of a blowhole in an embodiment A perspective view of a packing used for a blowhole in an embodiment. A perspective view of a packing used for a blowhole in an embodiment. Plan view of piping group in Comparative Example 1 Plan view of piping group in Comparative Example 2

Embodiments according to the present invention will be described in detail below based on the drawings. Note that the present invention is not limited to this embodiment.

(Embodiment)
FIG. 1 is a schematic diagram of a bathtub 2 in an embodiment.

The bathtub 2 shown in FIG. 1 is a bubble bathtub installed in a bathroom 3 of a general household. The bathtub 2 includes a bathtub body 4, an in-bathroom controller 6, a control box 8, and a bubble generator 10.

The bathtub body 4 is a box-shaped member installed at the bottom of the bathroom 3. The bathroom controller 6 is a member that displays various operating information such as hot water temperature for the bathroom 3 and is operated by the user. The bathroom controller 6 includes, for example, a liquid crystal screen and a plurality of buttons. The bathroom controller 6 is electrically connected to the control box 8.

The control box 8 is a control unit that controls the operation of the bubble generator 10. The control box 8 includes, for example, a microcomputer. The control box 8 is electrically connected between the bathroom controller 6 and the bubble generator 10, and controls the operation of the bubble generator 10 based on a control signal transmitted from the bathroom controller 6.

The bubble generator 10 is a device for generating bubbles in the bathtub body 4. The bubble generator 10 has various types of piping extending to the bottom of the bathtub body 4.

As shown in FIG. 1, the bubble generator 10 includes a pump 12, a first silencer 14, a second silencer 16, a check valve 18, a single drop pipe 20, an attic pipe 22, and a wall pipe. 24.

The pump 12 is a member that sends air to be supplied to the bathtub body 4. The pump 12 sucks air from the ceiling of the bathroom 3 and supplies it to the downstream side. The first silencer 14 and the second silencer 16 are members for suppressing pulsation of the pump 12. The first silencer 14 is provided on the upstream side of the pump 12, and the second silencer 16 is provided on the downstream side of the pump 12. The check valve 18 is a member that prevents the air supplied from the pump 12 from flowing backward. The drop pipe 20 is a member for sucking air into the pump 12, and may be connected to an intake port.

The ceiling pipe 22 is a pipe arranged in a space under the ceiling of the bathroom 3. The attic pipe 22 is connected to the second silencer 16, the check valve 18, and the pump 12 on the upstream side, and is connected to the wall pipe 24 on the downstream side. The back-wall pipe 24 is a pipe arranged in a space behind the side wall surface of the bathroom 3. The wall back pipe 24 extends downward toward the bottom of the bathtub body 4. The ceiling pipe 22 and the wall pipe 24 constitute one "main pipe" in the bubble generator 10.

The surrounding structure of the bathtub body 4 to which the bubble generator 10 is connected will be explained using FIGS. 2A to 2C. 2A is a plan view of the bathtub body 4, FIG. 2B is a side view of the bathtub body 4, and FIG. 2C is a bottom view of the bathtub body 4.

The bathtub body 4 shown in FIGS. 2A to 2C includes a flange portion 26, a side wall portion 28, and a bottom portion 30.

As shown in FIG. 2A, a plurality of blowholes 32, a plurality of anti-slip portions 34, and a discharge port 36 are provided on the front side of the bottom 30 of the bathtub body 4.

The blowhole 32 is an opening for blowing air supplied from the bubble generator 10 described above into the bathtub body 4 as bubbles. In the example shown in FIG. 2A, a total of ten blowholes 32 are provided in a distributed manner.

The anti-slip portion 34 is a portion of the bottom portion 30 that has been subjected to anti-slip processing. In the example shown in FIG. 2A, a plurality of anti-slip portions 34 are arranged in a staggered manner in a region near the center of the bottom portion 30. As shown in FIG. As shown in FIG. 2A, two blowholes 32A are included in the arrangement pattern of the plurality of anti-slip parts 34.

The discharge port 36 is an opening for discharging water stored in the bathtub body 4 to the outside.

As shown in FIG. 2B, the bathtub body 4 is installed at a position surrounded by the installation surface 37 and side wall surface 48 of the bathroom 3. A gap is provided between the installation surface 37 and the side wall surface 48 and the bathtub body 4. In particular, the bathtub 2 has a specification in which the gap D between the bathtub body 4 and the installation surface 37 is considerably narrow.

As shown in FIG. 2C, a pipe group 38 is provided on the back side of the bottom 30 of the bathtub body 4. The pipe group 38 is made up of a plurality of pipes that constitute the bubble generator 10, and is arranged in the gap D between the bottom 30 of the bathtub body 4 and the installation surface 37. The pipe group 38 is branched so as to be connected to each of the blowholes 32 of the bathtub body 4. The pipe group 38 guides air supplied from the upstream side of the bubble generator 10 to the blowhole 32 to generate bubbles in the bathtub body 4.

The pipe group 38 includes a first pipe 40A and a second pipe 40B as two main pipes. The detailed configuration of the pipe group 38 including the first pipe 40A and the second pipe 40B will be described later.

As shown in FIG. 2B, the bubble generator 10 further includes a first joint part 44 and a second joint part 46. Both the first joint part 44 and the second joint part 46 are flow path members for connecting the first pipe 40A and the second pipe 40B to the wall pipe 24 described above. Both the first joint part 44 and the second joint part 46 are attached to a side wall surface 48 of the bathroom 3. The first joint part 44 is arranged in the space between the side wall part 28 of the bathtub body 4 and the side wall surface 48 of the bathroom 3, and the second joint part 46 is arranged in the space behind the side wall surface 48 of the bathroom 3. Placed. Both the first pipe 40A and the second pipe 40B are arranged below the flange portion 26 of the bathtub body 4.

A first pipe 40A and a second pipe 40B are connected to the first joint part 44, and a back-wall pipe 24 is connected to the second joint part 46.

The detailed configuration of the first joint portion 44 will be explained using FIGS. 3A and 3B. 3A is a front view of the first joint part 44, and FIG. 3B is a side view of the first joint part 44.

As shown in FIGS. 3A and 3B, the first joint portion 44 has a shape that is bifurcated from the upstream side to the downstream side. The first joint section 44 includes an upstream connection port 50, a main body section 52, a first downstream port 54, and a second downstream port 56.

The above-described second joint portion 46 is connected to the upstream connection port 50, the first pipe 40A is connected to the first downstream port 54, and the second pipe 40B is connected to the second downstream port 56. .

By providing such a first joint portion 44 and connecting the first pipe 40A and the second pipe 40B, the wall pipe 24 that constitutes the main pipe of the bubble generator 10 can be easily branched into two pipes. Can be done.

Next, the detailed configuration of the pipe group 38 will be explained using FIG. 4. FIG. 4 is a plan view of the pipe group 38.

As shown in FIG. 4, the first pipe 40A and the second pipe 40B each extend along the X direction and are arranged adjacent to each other in the Y direction intersecting the X direction. The X direction is the longitudinal direction, ie, the length direction, of the bathtub body 4, and the Y direction is the lateral direction, ie, the width direction, of the bathtub body 4.

The pipe group 38 has a base pipe 58A and a connecting part 60A as the first pipe 40A, and has a base pipe 58B and a connecting part 60B as the second pipe 40B. The pipe group 38 further includes a plurality of branch pipes 62A and 62B.

The base pipes 58A and 58B are pipes that extend along the X direction and are spaced apart from each other in the X direction. A plurality of base tubes 58A and 58B are each provided along the X direction.

The connecting parts 60A and 60B are flow path members that connect two mutually adjacent base pipes 58A and 58B, respectively. Each of the connecting parts 60A and 60B has a bifurcated shape.

Branch pipes 62A, 62B are connected to the connecting parts 60A, 60B, respectively. The branch pipes 62A, 62B are branched from the connecting parts 60A, 60B so as to be connected to each of the plurality of blowholes 32.

The pipe group 38 further includes terminal pipes 63A and 63B, which constitute the downstream ends of the first pipe 40A and the second pipe 40B, respectively. Each of the end pipes 63A, 63B extends from the connecting parts 60A, 60B toward the jet nozzle 32 at the end so as to curve gently.

Here, the detailed configuration of the connecting parts 60A and 60B will be explained using FIG. 5. FIG. 5 is a plan view showing a state in which two base pipes 58A and one branch pipe 62A are connected to the connecting component 60A. Since the connection component 60B has the same configuration as the connection component 60A, the description thereof will be omitted.

As shown in FIG. 5, the connection component 60A has a first flow path 64 and a second flow path 66.

The first flow path 64 is a portion that constitutes the main flow path of the connection component 60A, and extends linearly along the X direction. Base pipes 58A are attached to both ends of the first flow path 64 so as to cover the first flow path 64 from the outside. The inner diameter D1 of the base tube 58A is larger than the inner diameter D2 of the first flow path 64.

With the two base tubes 58A connected to both ends of the first flow path 64, fixing members 68 and 70 are provided to tighten and fix the respective connection points from the outside.

The second flow path 66 is a flow path that branches from the first flow path 64 . The inner diameter D2 of the second flow path 66 and the inner diameter D2 of the first flow path 64 are the same. A branch pipe 62A is connected to the second flow path 66. A branch pipe 62A is attached to cover the end of the second flow path 66 from the outside. The inner diameter D3 of the branch pipe 62A is larger than the inner diameter D2 of the second flow path 66.

In this embodiment, the inner diameter D1 of the base pipe 58A and the inner diameter D3 of the branch pipe 62A are set to have substantially the same length.

With the branch pipe 62A connected to one end of the second flow path 66, a fixing member 72 is provided that tightens and fixes the connection point from the outside.

The second flow path 66 branches at a predetermined angle α with respect to the X1 direction, which is the downstream side of the first flow path 64 in the gas flow direction. The angle α in the embodiment is set to an acute angle. This makes it possible to reduce the pressure loss when the air branches and flows from the first flow path 64 to the second flow path 66 than when the angle α is set to 90 degrees or more, and the air bubbles ejected from the jet nozzle 32. The decrease in the flow rate can be suppressed.

Next, a detailed configuration of the jet nozzle 32 to which the branch pipes 62A and 62B are connected will be described using FIGS. 6, 7A, and 7B. FIG. 6 is a vertical cross-sectional view showing the peripheral configuration of the jet nozzle 32, and FIGS. 7A and 7B are perspective views of the packing used for the jet nozzle 32 from different angles.

As shown in FIG. 6, the blowhole 32 formed in the bottom 30 of the bathtub body 4 is provided with a packing 74, an intermediate member 76, and a cover member 78.

The packing 74 is a ring-shaped member provided so as to be in contact with the edge of the jet nozzle 32 . Providing the packing 74 prevents water from leaking from the bathtub body 4 to the outside.

The intermediate member 76 is a cylindrical member provided inside the packing 74. The intermediate member 76 has a through hole in the center, and air flows through the through hole. As shown in FIG. 6, one of the branch pipes 62A and 62B is inserted and attached between the intermediate member 76 and the packing 74. The internal channels of the branch pipes 62A and 62B communicate with the through hole of the intermediate member 76.

The cover member 78 is a member attached to the upper surface of the intermediate member 76 so as to cover the blowhole 32. The cover member 78 is provided with a plurality of through holes (not shown), and the through holes communicate with the through holes of the intermediate member 76 . According to such a configuration, air flowing from the branch pipes 62A, 62B is blown into the bathtub body 4 through the through holes of the intermediate member 76 and the cover member 78. Thereby, air can be blown into the water stored in the bathtub body 4 to generate bubbles.

Here, the detailed configuration of the packing 74 will be explained using FIGS. 7A and 7B.

As shown in FIGS. 7A and 7B, the packing 74 includes a first flange portion 80, a second flange portion 82, a cylindrical main body portion 84, and a rib 86.

The first flange part 80 is arranged on the front side of the bottom part 30 of the bathtub body 4, and the second flange part 82 is arranged on the back side of the bottom part 30. The cylindrical main body portion 84 is a cylindrical portion disposed along the inner edge of the bottom portion 30 and connects the first flange portion 80 and the second flange portion 82.

The rib 86 is a protrusion provided inside the cylindrical main body portion 84 . As shown in FIGS. 7A and 7B, the ribs 86 of this embodiment have a shape that extends linearly along the length of the cylindrical main body 84, and are spaced apart in the circumferential direction of the cylindrical main body 84. There are multiple locations spaced apart.

Branch pipes 62A and 62B are disposed in contact with the inner peripheral surface of the cylindrical main body portion 84 having such ribs 86. The branch pipes 62A, 62B are arranged between the cylindrical main body 84 of the packing 74 and the intermediate member 76, and the ribs 86 on the inner circumferential surface of the cylindrical main body 84 allow the separation between the packing 74 and the intermediate member 76. It is press-fitted in between. According to such a configuration, the branch pipes 62A, 62B can be firmly attached simply by inserting the branch pipes 62A, 62B between the packing 74 and the intermediate member 76, so that the installation work of the bubble generator 10 and The installation work of the bathtub 2 can be easily performed.

As described above, the bubble generator 10 of this embodiment includes a pump 12 that sends air, a back-wall pipe 24 as a main pipe through which air sent from the pump 12 flows, and a first pipe branched from the back-wall pipe 24. It includes a pipe 40A, a second pipe 40B, and branch pipes 62A and 62B branching from the first pipe 40A and the second pipe 40B, respectively. In such a configuration, the first pipe 40A and the second pipe 40B branch from the wall pipe 24 before entering the gap D, which is the space behind the bottom 30 of the bathtub body 4, as shown in FIG. 2B etc. .

In this way, by branching the wall pipe 24, which is the main pipe, into two pipes before entering the space behind the bottom 30 of the bathtub body 4, two pipes 40A with a small diameter are installed in the space behind the bottom 30. , 40B, a plurality of branch pipes 62A, 62B can be branched from each of the pipes 40A, 40B. For such a configuration, when one pipe with a small diameter is branched so as to pass through the space on the back side of the bottom part 30 and connect from the pipe to the jet nozzle 32 of the bottom part 30, it is necessary to branch from one pipe. As the number of locations increases, the amount of air blown out from each branch pipe tends to vary. On the other hand, by branching branch pipes 62A and 62B from each of the two pipes 40A and 40B branching from the wall pipe 24, the amount of air blown out from each branch pipe 62A and 62B can be made more uniform. be able to. In this way, even if the gap D on the back side of the bottom 30 of the bathtub body 4 is narrow, it is possible to generate bubbles at a desired flow rate while installing piping according to the installation conditions of the bathtub 2. .

Moreover, according to the bubble generator 10 of the embodiment, each of the first pipe 40A and the second pipe 40B is a plurality of base pipes arranged at intervals along the X direction, which is the longitudinal direction of the bathtub body 4. 58A, 58B, and connecting parts 60A, 60B that connect two adjacent base pipes 58A. Further, each of the connecting parts 60A and 60B has a first flow path 64 connecting the two base pipes 58A and 58B, and a first branch pipe 62A or a second branch pipe 62B branched from the first flow path 64. and a second flow path 66 connected to either of the two.

By providing such connection parts 60A and 60B, it is possible to connect the two base pipes 58A and 58B with a simple configuration and branch them to connect to the first branch pipe 62A or the second branch pipe 62B. .

Further, according to the bubble generator 10 of the embodiment, the second flow path 66 in the connecting parts 60A and 60B branches at an acute angle toward the X1 direction, which is the downstream side in the gas flow direction with respect to the first flow path 64. do.

According to such a configuration, pressure loss when air branches and flows from the first flow path 64 to the second flow path 66 is reduced, and a desired flow rate of air can be ejected from the blowhole 32.

Moreover, according to the bubble generator 10 of the embodiment, the inner diameter D2 of the first flow path 64 and the second flow path 66 in the connecting parts 60A and 60B is smaller than the inner diameter D1 of the base pipes 58A and 58B.

According to such a configuration, since the inner diameter D2 of the connecting parts 60A, 60B is small, the pressure loss when air passes through the connecting parts 60A, 60B increases, and the flow rate of each branch pipe 62A, 62B tends to vary. . In such a configuration, by adopting a piping configuration that suppresses the variation in flow rate as described above, the narrow diameter piping 40A, 40B and the connecting parts 60A, 60B can be passed through the space on the back side of the bottom 30 of the bathtub body 4. However, variations in flow rate between the branch pipes 62A and 62B can be effectively suppressed.

The bubble generator 10 of the embodiment further includes joints 44 and 46 that connect the back-wall pipe 24, which is the main pipe, to the first pipe 40A and the second pipe 40B.

By providing such joints 44 and 46, the main piping can be branched with a simple configuration.

Moreover, according to the bubble generator 10 of the embodiment, the joint part 44 is arranged in the space between the side wall surface 48 surrounding the bathtub body 4 and the side wall part 28 of the bathtub body 4.

According to such a configuration, the space between the bathtub body 4 and the side wall surface 48 can be effectively utilized. In addition, by providing the joint part 44 immediately before the space on the back side of the bottom 30 of the bathtub body 4 and branching it into two pipes 40A and 40B, the pipes 40A and 40B are more convenient than when the joint part 44 is provided further upstream. The flow rate of air flowing through each can be made uniform.

Moreover, the bathtub 2 of the embodiment includes a bubble generator 10 and a bathtub body 4 having a plurality of blowholes 32 in the bottom 30 to which the first branch pipe 62A or the second branch pipe 62B of the bubble generator 10 is connected. , is provided.

According to such a configuration, the same effects as the bubble generator 10 described above can be achieved.

(Comparative Examples 1 and 2)
Comparative Examples 1 and 2 will be explained using FIGS. 8 and 9. FIG. 8 is a plan view of a pipe group 100 in Comparative Example 1, and FIG. 9 is a plan view of a pipe group 200 in Comparative Example 2.

In the pipe group 100 shown in FIG. 8, a plurality of branch pipes 106 are branched from one main flow path 102 and connected to the blowhole 32. The main channels 102 are connected to each other by a cross-shaped connecting piece 104. Two branch pipes 106 are connected to one connecting component 104, and each of the branch pipes 106 is connected to the blowhole 32. In this way, ten branch pipes 106 are branched and connected to a total of ten blowholes 32 from one main flow path 102. The piping group 100 shown in FIG. 8 is called, for example, a "dragonfly shape."

In the pipe group 200 shown in FIG. 9, one main flow path 202 is branched into two pipes 204 and 206, and a first pipe 204 and a second pipe 206 are connected by a third pipe 208 on the downstream side. . The first pipe 204 and the second pipe 206 communicate not only on the upstream side but also on the downstream side, and form one large annular flow path. With such a configuration, a total of ten blowholes 32 are connected to one ring-shaped main flow path. The pipe group 200 shown in FIG. 9 is called, for example, a "circle shape."

According to the pipe groups 100 and 200 described above, one main flow path is branched into a plurality of jet ports 32, so when branching from two pipes 40A and 40B as in the pipe group 38 of the above-described embodiment, Compared to the above, there are more branch points for one flow path. In such a case, if the diameter of the piping is made smaller according to the gap D in the bottom 30 of the bathtub body 4, the flow rate ejected from each of the blowholes 32 tends to vary. In particular, there is a tendency that the flow rate of the jet nozzle 32 on the center side in the X direction, which is the longitudinal direction, tends to be smaller than the flow rate of the jet nozzle 32 on the end side in the X direction.

On the other hand, according to the pipe group 38 of this embodiment, since the branch pipes 62A and 62B are branched from the two pipes 40A and 40B, the number of branching points for one flow path is reduced, and the pipe 40A and 40B are branched from each other. , 40B have small diameters, the flow rate ejected from each of the jet ports 32 is less likely to vary. In this way, even if the gap D on the back side of the bottom 30 of the bathtub body 4 is narrow, it is possible to generate bubbles at a desired flow rate while installing piping according to the installation conditions of the bathtub 2. .

Note that the present invention is not limited to the above embodiments, and can be implemented in various other ways.

Although the invention has been fully described with reference to preferred embodiments and with reference to the accompanying drawings, various variations and modifications will become apparent to those skilled in the art. It is to be understood that such variations and modifications are included insofar as they do not depart from the scope of the invention as defined by the appended claims. Further, combinations and changes in the order of elements in the embodiments can be realized without departing from the scope and spirit of the present invention.

INDUSTRIAL APPLICATION This invention is useful for the bubble generator which generates bubbles in a bathtub, and a bubble bathtub equipped with the same.

2 Bathtub (bubble bathtub)
3 Bathroom 4 Bathtub body 6 Bathroom controller 8 Control box 10 Bubble generator 12 Pump 14 First silencer 16 Second silencer 18 Check valve 20 Single drop pipe 22 Under-ceiling piping 24 Behind-the-wall piping 26 Flange portion 28 Side wall portion 30 Bottom portion 32 Fumarole port 34 Anti-slip portion 36 Discharge port 37 Installation surface 38 Piping group 40A First piping 40B Second piping 44 First joint portion 46 Second joint portion 48 Side wall surface 50 Upstream side connection port 52 Main body portion 54 First downstream side Port 56 Second downstream ports 58A, 58B Base pipes 60A, 60B Connection parts 62A First branch pipe 62B Second branch pipes 63A, 63B End pipe 64 First flow path 66 Second flow path 68, 70, 72 Fixing member 74 Packing 76 Intermediate member 78 Cover member 80 First flange portion 82 Second flange portion 84 Cylindrical main body portion 86 Rib

Claims (6)

A bubble generator that generates bubbles in a bathtub,
The main pipe that flows the gas,
a pump that sends gas to the main pipe;
a first pipe and a second pipe branching from the main pipe;
a first branch pipe that further branches from the first pipe and is connected to a blowhole provided at the bottom of the bathtub body from the back side of the bottom;
A second branch pipe further branching from the second pipe and connected to a blowhole provided at the bottom of the bathtub body from the back side of the bottom,
The first pipe and the second pipe branch from the main pipe before entering the space on the back side of the bottom of the bathtub body ,
Each of the first pipe and the second pipe includes a plurality of base pipes arranged at intervals along the longitudinal direction of the bathtub body, and two adjacent base pipes among the plurality of base pipes. and a connecting part to be connected,
Each of the connection parts is connected to a first flow path connecting the two base pipes, and to either the first branch pipe or the second branch pipe branched from the first flow path. A bubble generator having a second flow path . The bubble generator according to claim 1 , wherein the second flow path in the connecting component branches at an acute angle toward the downstream side in the gas flow direction with respect to the first flow path. The bubble generator according to claim 1 or 2 , wherein an inner diameter of the first channel and the second channel in the connecting component is smaller than an inner diameter of the base tube. The bubble generator according to any one of claims 1 to 3 , further comprising a joint part that connects the main pipe, the first pipe, and the second pipe. The bubble generator according to claim 4 , wherein the joint part is arranged in a space between a wall surface surrounding the bathtub body and a side wall part of the bathtub body. The bubble generator according to any one of claims 1 to 5 ,
A bubble bathtub comprising: the bathtub main body having a plurality of blowholes at the bottom to which the first branch pipe or the second branch pipe of the bubble generator is connected.

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