JP2000245799A - Bubble generator for bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bubble generator for a bathtub capable of preventing foreign matter from being caught in a check valve, capable of reliably preventing water leakage caused by failure of the check valve and having a simple structure. SOLUTION: An air introducing passage 16 for introducing air to a jet water forming part 4 from the outside is formed so as to reach an air intake port 22 by extending downward by making a U-turn after reaching a position higher than the highest water level considered as a standard of a bathtub by extending upward from the jet water forming part 4, and a check valve 24 having a dead weight valve element is arranged in the air intake port 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble generating device for a bathtub used for blowing bubbles together with jet water into a bathtub.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional bubble generating device for a bath tub described in Japanese Patent Application Laid-Open No. 8-182717. In this conventional example, water (including hot water) is circulated between a bathtub 1 and a circulation waterway 2 connected to the bathtub 1, and when the water is returned into the bathtub 1, the water is used as jet water and air is blown from the surroundings. In order to generate bubbles by taking in air, the circulating water channel 2 is provided with a pump 3, a jet water forming part 4 is provided, and extends upward from the jet water forming part 4. It has an air introduction pipe 7 provided with a check valve 6.

[0003] The jet water forming section 4 has an orifice 8 for squeezing the water pumped from the pump 3, a nozzle 9 for jetting the squeezed water into the bathtub 1, and a nozzle 9 around the nozzle 9 and passing therethrough. An air chamber 10 is provided for mixing air from the surroundings into the jet water. The check valve 6 includes a spherical valve body 11 that opens and closes the air inlet 5 from below, and a spring 12 that urges the spherical valve body 11 upward and presses the valve seat 13.

In this conventional example, the air introduction path can be shortened and the cost can be reduced as compared with a bathtub bubble generator in which an air introduction path is formed by an earlier rubber hose pipe. It has the advantages of preventing problems such as breakage from occurring beforehand, improving maintainability, and contributing to reduction of air suction noise.

[0005]

However, in the above conventional example shown in FIG. 5, when foreign matter is caught between the spherical valve body 11 and the valve seat 13, the water cannot be stopped when the pump 3 is stopped, and the bathtub 1 is stopped. There is a problem that the water level inside falls. In this conventional example, since the check valve 6 is opened upward, dust such as FRP powder easily enters the check valve 6 at the time of construction, and there is a sufficient risk of foreign matter getting stuck.

Further, the need for the spring 12 increases the cost due to an increase in the number of parts. Moreover, it is difficult to adjust the spring force of the spring 12, and if the spring force is too weak, the water stopping effect is insufficient. On the other hand, if the spring force is too strong, the noise at the time of air introduction becomes large.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention circulates water between a bath tub and a circulating water passage connected to the bath tub. In a bathtub bubble generator that generates water by taking in air from the surroundings as well as water, an air introduction path that guides the air from outside to a jet water forming part extends upward from the jet water forming part. , After reaching a position higher than the standard conceivable maximum water level of the bathtub, forming a U-turn and extending downward to reach the air intake;
The air intake is provided with a check valve having a self-weight valve body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

The basic structure is the same as that of the prior art, in which water is circulated between the bathtub 1 and the circulating water passage 2 connected to the bathtub 1 through the water suction port 15, and when the water is returned into the bathtub 1, the water is mixed with the jet water. In order to generate air bubbles by taking in air from the surroundings, a pump 3 is provided in the circulating water channel 2 and a pair of left and right jet water forming units 4 is provided. The jet water forming part 4 includes an orifice 8 for restricting water pumped from the pump 3, a nozzle 9 for jetting the constricted water into the bathtub 1, and a jet water around the nozzle 9 and passing through the nozzle 9. Is provided with an air chamber 10 for mixing air from its surroundings.

As shown in FIGS. 1 and 2, the air introducing portion 16 for guiding the air from the outside to the air chamber 10 includes left and right branch pipes 17a extending upward from the left and right jet water forming portions 4, respectively. 17b and both branch pipes 17a, 17
b, an upward pipe 19 further extending upward, a horizontal pipe 20 connected to the upward pipe 19 and extending substantially horizontally, and a lower pipe connected to the horizontal pipe 20 and extending downward. And a direction pipe 21. The horizontal pipe 20 reaches near the upper edge of the bathtub 1 and is higher than the standard conceivable maximum water level of the bathtub 1. The air intake 22 at the lower end of the downward pipe 21 is located above the junction 18 and has a check valve 24 having a spherical dead-weight valve body 23 as shown in FIG. 2
Reference numeral 5 denotes a valve seat formed of rubber.

In this embodiment, since the check valve 24 is opened downward, foreign matter is less likely to be caught between the self-weight valve body 23 and the valve seat 25, and even if the check valve 24 is defective. Even in the state, since the air introduction section 16 has a portion reaching a position higher than the standardly conceivable maximum water level of the bathtub 1, water leakage can be prevented.

Further, in this embodiment, the check valve 24 is constituted by the self-weight valve body 23, so that a spring as in the conventional example is not required, so that the cost can be reduced, and the check valve is necessary in the conventional example. This eliminates the need for adjusting the spring force of the spring.

In the above embodiment, the pipes 17a, 17b, 1
Although the air introduction section 16 is configured by combining 9, 20, and 21, it is also possible to configure the air introduction section 16 by combining pipes, hoses, and the like, and the shape is also limited to that shown in FIG. Instead, it extends upward from the jet water forming part 4,
After reaching a position higher than the standard conceivable maximum water level of the bathtub 1, it makes a U-turn and extends downward, and the air intake 2
Any shape that reaches 2 is acceptable. In another embodiment of the present invention shown in FIG. 4, the T-shaped pipe 28 is positioned at the highest position, and both ends of the T-shaped pipe 28 are connected to the left and right jet water forming sections 4 by hoses. 29, and a check valve 24 having a self-weight valve body is attached to the lower end of the downward hose 29. In FIG. 4, reference numerals 3a and 3b denote an impeller and a motor which constitute the pump 3, respectively.

[0014]

According to the present invention, there is provided an air bubble generator for a bath tub, in which foreign matter is less likely to be caught in the check valve, water leakage due to check valve failure can be reliably prevented, and the structure is simple. Can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional side view of the main part.

FIG. 3 is a sectional view showing a check valve.

FIG. 4 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 5 is a conceptual diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Circulation waterway 4 Jet water formation part 16 Air introduction path 22 Air intake 23 Self-weight valve body 24 Check valve

Claims (1)

[Claims] 1. A bathtub which circulates water between a bathtub and a circulation channel connected to the bathtub, and when returning the water into the bathtub, forms jet water and takes in air from the surroundings to generate air bubbles. In the bubble generator, an air introduction path for guiding the air from outside to the jet water forming part extends upward from the jet water forming part, and reaches a position higher than a standardly conceivable maximum water level of the bathtub. A bubble generating device for a bathtub, wherein a U-turn is formed so as to extend downward to reach an air intake, and a check valve having a self-weight valve body is disposed at the air intake.