JP2586259Y2 - Air backflow prevention structure for bubble generating bathtub - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing air from flowing back in a bubble generating bathtub. More specifically, the present invention relates to a structure for preventing bath water from overflowing from an air suction pipe when operation is stopped.

[0002]

2. Description of the Related Art There has been known a bubble-generating bathtub in which a bath containing air is jetted from several places on a wall surface for the purpose of comfortable and healthy bathing. This bubble generating bathtub
For example, as illustrated in FIG. 3 as a whole perspective view and FIG. 4 as a system schematic diagram, a pump (a) installed outside the bathtub causes hot water in the bathtub to flow from a suction port (a) to a pipe (c) ( D) It is returned to several nozzles (f) through (e), and at the same time, air is supplied to this nozzle (f) from the air suction pipe (g), and air bubbles are generated in the jet from the nozzle (f). Is caused to occur.

The operation and stop of the circulating pump (a) or the selection of the bubble generation position are performed by operating a switch panel (h) disposed on a bathroom wall or the like.
It is also done through.

[0004]

Further, in the case of the bubble generating bath having the above-described structure and configuration, the bath water flowing backward from the nozzle (f) when the circulation pump (a) is stopped is air. The air suction pipe (g) is also provided with an air check valve (sa) in order to prevent the air from leaking from the suction port (h) of the suction pipe (g). As the air check valve (b), for example, as shown in FIG. 5, a ball valve body (b) is known in which the ball valve body (b) floats by backflow water to block a ventilation port (b).

However, in the case of such an air check valve (sa), as shown in FIG. 6, the ball valve body (h) is pressed against the horizontal ball receiving surface (c) when inhaling air. At this time, the turbulence of the air flow causes the ball valve element (U) to move on the ball receiving surface (SA), generating unpleasant noise. For this reason, comfortable bathing was hindered.
The present invention has been made in view of the above circumstances, and eliminates the drawbacks of the conventional bubble-generating bath, without generating unpleasant noise and reliably preventing the backflow of the bath. It is an object of the present invention to provide an improved air backflow preventing structure.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by providing an air-bubble tub that mixes air and jets out hot tub led out of the tub by a circulation pump unit into the tub. An air check valve is provided in the suction pipe, and the check valve is provided with a ball valve body and an arm-curved ball receiving surface.

In the present invention, it is preferable that the upper intake port of the air suction pipe is located with a minimum gap below the flange of the bathtub so that air can be sucked.

[0008]

In the structure according to the present invention, the check valve of the air suction pipe has a curved ball-receiving surface, so that the ball valve body at the time of air suction is placed on the ball-receiving surface regardless of airflow turbulence. Located at the very bottom of the, it does not move around. Therefore, unpleasant noise does not occur.

In addition, since the upper intake port of the air suction pipe is located below the bathtub flange, even if the valve function of the check valve is defective, the backflow water can be kept in the air suction pipe. .

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This invention will be described in more detail. FIG. 1 (a)
(B) is a cross-sectional view illustrating an air check valve used in the air backflow prevention structure of the present invention.

The air check valve (1) is interposed at a predetermined position of an air suction pipe (2) connected to a nozzle of a bubble generating bath, and when air is sucked, a ball valve body as shown in FIG. (3) is located on the ball receiving surface (4) and the vent (5)
Is released, and the air sucked from the intake port (6) is supplied to the nozzle. On the other hand, when the suction of air is stopped and the hot water flows backward from the nozzle, the ball valve body (3) floats and closes the vent (5) as shown in FIG. It does not rise in the direction of the mouth (6).

As a feature of the present invention, in the case of the air check valve (1), since the ball receiving surface (4) is bent in the shape of an arm, the air check valve (1) as shown in FIG. During inhalation, the ball valve (3) is located at one position of the ball receiving surface (4) and does not move around. Therefore, unpleasant noise does not occur. FIG. 2 is a side view of a bubble generating bathtub showing one embodiment of the present invention.

For example, in the case of the bathtub illustrated in FIG. 2, an air check pipe (2) is provided with an air check valve (1) similar to that of FIG. The position of the inlet (6) in (2) is close to the back surface of the bathtub flange (7). By doing so, even if the valve function of the air check valve (1) is defective, since the intake port (6) is located above the water level (8) of the bath water, the backflow water is not supplied to the air suction port. It stays in the pipe (2) and does not overflow from the inlet (6).

The position of the intake port (6) is set as close to the flange (7) as possible, and a minimum gap is provided between the intake port (6) and the flange (7) so that air can be sucked. I do. Of course, the present invention is not limited to the above examples, and it goes without saying that various forms are possible for the shape and the like of the details.

[0015]

As described in detail above, the present invention makes it possible to provide a bubble-generating bathtub that does not cause unpleasant noise and that reliably prevents the backflow of bath water.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views illustrating an air check valve used in the present invention.

FIG. 2 is a side view of a bubble generating bathtub showing one embodiment of the present invention.

FIG. 3 is a perspective view illustrating a bubble generating bathtub.

FIG. 4 is a system schematic diagram of a bubble generation bathtub.

FIG. 5 is a cross-sectional view illustrating an operation state of a conventional air check valve.

FIG. 6 is a cross-sectional view illustrating a state in which air is sucked in a conventional air check valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air check valve 2 Air suction pipe 3 Ball valve body 4 Ball receiving surface 5 Vent 6 Inlet 7 Flange 8 Bath water level

Claims (2)

(57) [Scope of request for utility model registration] An air check valve is provided in an air suction pipe in a bubble generating bath which mixes air and jets bath water drawn out of the bath by a circulation pump unit into the bath. An air backflow prevention structure for a bubble generating bath tub, comprising a ball valve body and a curved arm receiving surface. 2. The bubble tub according to claim 1, wherein an upper end intake port of the air intake pipe is disposed below the bathtub flange, and a gap between the upper end intake port and the bathtub flange is a minimum gap through which air can be sucked. Air backflow prevention structure.