JPH0314465B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ejection device for a bubble bathtub.

(Prior art) Conventionally, this type of ejection device was
As shown in Japanese Patent No. 106652, there is a bathtub which has a water inlet that sucks hot water in the bathtub using a pump, and a nozzle that mixes air with the hot water circulated by the pump and sprays it into the bathtub. A cover covering the water intake port is fixed to the nozzle, and
The nozzle is fixed to the main body to which the water supply pipe is connected, and is provided with a restriction so as to suck air from the air intake port.

(Problems to be Solved by the Invention) However, the above conventional example has the following problems.

Since the nozzle is fixed to the main body to which the water supply pipe is connected, and the cover is fixed to the nozzle, the positional relationship between the bathtub wall and the cover varies widely due to installation errors of the main body and the nozzle interposed therebetween. Moreover, as the thickness of the bathtub wall changes, the gap between the bathtub wall and the cover becomes narrower.

Further, the shape of the discharge passage was narrowed only once with consideration only to suction of air, and the quality of the bubbles contained in the discharge flow was not considered.

Furthermore, no consideration was given to making it possible to replace the nozzle from inside the bathtub after construction.

(Means for Solving the Problems) The present invention aims to solve the above problems and is characterized by the following configuration.

The bath adapter body is arranged outside the bathtub wall and is connected to the pump, the connection tube is fixed by inserting the bathtub wall between the bath adapter body, and the bath adapter is fixed to the connection tube at the flange part. Consists of a cylindrical nozzle holder that is inserted into the main body so that the outer periphery becomes a water absorption passage and the inner periphery becomes a discharge passage, and a cover that is fixed to the nozzle holder and forms a gap between the bathtub wall and the water absorption passage. be done.

Further, the discharge passage is once constricted by an ejector nozzle that sucks air, and then contracted and expanded at least once to communicate with the bathtub.

Furthermore, an ejector nozzle is detachably attached to the rear end of the nozzle holder.

(Function) The connection tube is fixed by sandwiching the bathtub wall with the bath adapter body, and the nozzle holder to which the cover is fixed is fixed to the connection tube, so the positional relationship between the bathtub wall and the cover can be fixed with little installation error. Moreover, even if the thickness of the bathtub wall changes, the width of the gap does not change at all.

Furthermore, since the discharge passage is contracted and expanded several times, the passage resistance downstream of the ejector nozzle is alleviated, the amount of air sucked increases, and high-quality foam is produced.

Furthermore, since the ejector nozzle is attached to the nozzle holder that is fixed to the connecting tube from inside the bathroom, the ejector nozzle can also be removed from the bath adapter body at the same time as the nozzle holder is removed from the connecting tube. By attaching another ejector nozzle, you can change the amount and size of bubbles.

(Example) In the figure, 6 is a bathtub wall with a single hole 6a. 4 is the bus adapter body;
It is provided on the outside of the bathtub wall 6, and is connected to an outgoing pipe 1 connected to a discharge port of a pump (not shown), a return pipe 2 connected to a suction port of the pump, and an air conduit 5. . Further, the bus adapter main body 4 has a double-tubular shape, with an inner tube 4 a communicating with the outgoing tube 1 and an outer tube 4 b communicating with the return tube 2 . Reference numeral 3 denotes an ejector nozzle, which is shaped to narrow the discharge passage A, and is screwed onto a nozzle holder 7, which will be described later, and inserted into and removed from the inner tube 4a as a unit. Reference numeral 10 denotes a cylindrical connecting tube having a flange portion 10a at one end, which is screwed onto the bath adapter main body 4 through a hole 6a from the inside of the bathtub, and fixed by sandwiching the bathtub wall 6 with the flange portion 10a. It is something that will be done. 12 is Patsukin. Reference numeral 7 denotes a cylindrical nozzle holder, which holds an ejector nozzle holding part 7a to which the ejector nozzle 3 is screwed, an air port 7b communicating with the air conduit 5, a constriction part 7c that throttles the discharge passage A, and a discharge nozzle 8 to be described later. A hemispherical discharge nozzle holding part 7d, a cover fixing part 7e to which a cover 13 (to be described later) is screwed, and a flange part 7f extending outward from the cover fixing part 7e and having a step are arranged in order from the rear end. It is formed. The flange portion 7f has a water suction port 7g opened on the stepped surface, and the flange portion 10a of the connecting tube 10.
A screw hole 11 is opened to be fixed with a screw. Reference numeral 8 denotes a discharge nozzle formed with a spherical part at the rear and a cylindrical part that expands at the front, and the spherical part is held by the discharge nozzle holding part 7d, and is mounted with a nozzle holder 9 to prevent it from falling off. It is. Reference numeral 13 designates a cover having an opening in the center and a rearwardly curved flange 13a on the outer peripheral edge.The inner peripheral edge of the opening curves backward and is screwed onto the cover fixing part 7e of the nozzle holder 7. A fixing portion 13b is formed. The rear end of the flange 13a of the cover 10 is connected to the bathtub wall 6.
A gap 14 is formed over the entire circumference between the two. A cylindrical filter 15 is disposed around the outer periphery of the water intake port 7g of the nozzle holder 7, and is held between the flange portion 7f and the cover 13. A water suction passage B is formed from the gap 14, the water suction port 7g, the outer periphery of the nozzle holder 7 to the outer tube 4b, and the inner tube 4a, the ejector nozzle 3, and the constriction portion 7c.
A discharge passage A is formed from the discharge nozzle 8 to the discharge nozzle 8.

Next, the operation of the above configuration will be explained.
First, the assembly procedure is shown. The bath adapter main body 4 is placed on the outside of the bathtub wall 6 in correspondence with the hole 6a, and the connecting tube 10 is screwed into the bath adapter main body 4 from the inside of the bathtub through the hole 6a. Then, the bathtub wall 6 is inserted between the bath adapter main body 4 and fixed.
Thereafter, the outgoing pipe 1, return pipe 2, and air conduit 5 are connected and fixed to the bus adapter main body 4 by brazing or the like. On the other hand, screw the ejector nozzle 3 onto the inner circumferential surface of the nozzle holder 7, fit the spherical part of the discharge nozzle 8 into the discharge nozzle holding part 7d, and screw the nozzle holder 9 onto the screw of the cover fixing part 7e. Attach it to prevent it from falling off, and keep it as one assembly.
Then, this assembly is inserted from the ejector nozzle side into the inner tube 4a of the bath adapter main body 4 from the inside of the bathtub, and the flange 7f of the nozzle holder 7 is brought into contact with the flange 10a of the connection tube 10, and from the inside of the bathtub. The flange parts 7f and 10a are fixed with screws. Finally, the filter 15 is fitted into the stepped surface of the nozzle holder 7, and the cover 13 is screwed onto the cover fixing portion 7e of the nozzle holder 7.

When cleaning the filter 15, it can be easily taken out by removing the cover 13. Also, when replacing the ejector nozzle 3, the nozzle holder 7 can be easily pulled out by removing the screws that fix the flange part 75 of the nozzle holder 7 to the flange part 10a of the connecting tube 10, and it can be easily removed from inside the bathtub. can be exchanged for

Moreover, the gap created between the bathtub wall 6 and the cover 13 is caused by dimensional errors and assembly, since the nozzle holder 7 to which the cover 13 is fixed is fixed to the connecting tube 10 that is closely attached to the inner surface of the bathtub wall 6. It is difficult to cause misalignment caused by Even when this ejection device is attached to a thick plate bathtub, the dimensions of the gap 14 do not change, and there is no need to separately prepare parts for the thick plate.

Next, to explain the action of blowing out bubbles, first, a pump (not shown) is driven. Then, the bathtub water passes through the filter 15 through the gap 14, passes through the water intake port 7g, flows around the outer periphery of the nozzle holder 7, and flows through the outer tube 4.
b and the inner pipe 4a, and is sucked into the return pipe 2. The bathtub water discharged from the pump flows through the inner pipe 4a.
The liquid flows into the inside, is throttled by the ejector nozzle 3, and the flow rate increases and the pressure decreases. Then, when the pressure drops the most after leaving the ejector nozzle 3, the air port 7b
Inhale air from. And ejector nozzle 3
The inside of the nozzle holder 7 is wider than the pressure inside the nozzle holder 7, and the passage is widened and the pressure increases, but after being narrowed again by the constriction part 7c, it is expanded by the spherical part of the discharge nozzle 8. Thereafter, the discharge nozzle 8 is also constricted by the cylindrical portion and expanded again toward the inside of the bathtub. Since the passage repeatedly contracts and expands downstream of the ejector nozzle 3, the air bubbles mixed into the discharge flow are repeatedly pressurized and depressurized, and become uniform bubbles. Further, the reduced pressure downstream is added to the reduced pressure at the tip of the ejector nozzle 3, increasing the amount of intake air. Moreover, the inertia of the downstream discharge flow pulls the upstream discharge flow, thereby reducing passage resistance.

(Effects of the Invention) As described above, in the present invention, since the cover is attached to the nozzle holder, variations in the gap between the cover and the bathtub wall are reduced, and one type can be used for bathtubs with various thicknesses. Ta.

Furthermore, since the discharge passage is contracted and expanded several times after sucking air, the quality of the foam is improved and passage resistance is also reduced.

Furthermore, since the ejector nozzle is detachably attached to a nozzle holder that can be easily removed by simply removing screws from the inside of the bathtub, the ejector nozzle can be replaced even after construction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention. 3... Ejector nozzle, 4... Bath adapter body, 6... Bathtub wall, 7... Nozzle holder, 7f
...Flange portion, 13...Cover, A...Discharge passage, B...Water absorption passage.

Claims (1)

[Scope of Claims] 1. A bath adapter body disposed on the outside of the bathtub wall and connected to the pump, and a connecting tube fixed by inserting the bathtub wall between the bath adapter body and the flange portion. A cylindrical nozzle holder that is fixed to the tube and inserted into the bath adapter main body so that the outer circumference becomes a water absorption passage and the inner circumference becomes a discharge passage, and a cylindrical nozzle holder that is fixed to the nozzle holder and covers the opening of the water absorption passage to the bathtub. 1. A blowout device for a bubble bathtub, comprising: a cover that forms a gap for a water absorption passage between the bathtub wall and the bathtub wall. 2. A restriction is formed in the discharge passage leading from the pump discharge outlet side connection part of the bath adapter body arranged outside the bathtub wall to the inside of the bathtub, and an ejector nozzle is provided to suck in air, and the ejector nozzle is disposed downstream of the ejector nozzle. A blowout device for a bubble bathtub, characterized by being provided with a constriction part that contracts and expands a passage multiple times. 3. A bath adapter body arranged on the outside of the bathtub wall and connected to the pump, a connecting tube that is fixed by inserting the bathtub wall between the bath adapter body, and a screw inserted into the connecting tube from the inside of the bathtub at the flange part. A cylindrical nozzle holder that is fixed by a cylindrical tube and inserted into the bus adapter body so that the outer periphery becomes a water absorption passage and the inner periphery becomes a discharge passage, and a nozzle that is removably attached to the inner periphery of the rear end of the nozzle holder. 1. A blowout device for a bubble bathtub, comprising an ejector nozzle that is integrated with a holder and inserted into and removed from a bath adapter.