JPH04241859A - Air bubble generating device - Google Patents

Abstract

PURPOSE:To offer the air bubble generating device which can increase remarkably the suction quantity even if it consists of the constitution and the installation space which are scarcely changed from conventional ones. CONSTITUTION:An air bubble generating device nozzle 11 constitutes a characteristic feature of providing plural pieces of auxiliary exhaust ports 11b in the periphery of its exhaust port 11a, and also, allowing an axis center 12b of relevant plural pieces of auxiliary exhaust ports 11b to have an angle against the main exhaust port 11a, respectively, and also, concentrating the axis centers 12a, 12b of relevant main exhaust port 11a and auxiliary exhaust port 11b in one point of a discharge side. When the foam generating device of this invention is installed in, for instance, a bathtub and used, a massage effect, a washing effect, and a hot temperature effect exerted on the human body are improved further than the conventional, and also, an effect on suppressing lowly a noise is also obtained simultaneously.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a bubble generator that is set in a bathtub to provide a massage effect, a cleaning effect, etc. to a bather, or blows air for stirring inside the tank during sludge treatment, and furthermore, In particular, it relates to the nozzle structure of this type of device.

[Prior Art] Generally, compared to regular bathing, bathing using a bubble generator to generate bubbles in the bathtub has a massage effect that relieves fatigue, a cleaning effect that removes dirt from the body, and heat that promotes blood circulation. It is known to be effective. These effects are further improved by increasing the amount of bubbles because the sound pressure level of the ultrasonic waves generated when the bubbles burst increases. Here, the internal structure of a conventional bubble generator is shown in FIG. 3, and methods for increasing the amount of intake air sucked by this bubble generator generally include a method of increasing the flow rate of water jet from the nozzle 41, and a method of increasing the flow rate of water jet from the nozzle 41. - There is a method of increasing the inner diameter D of the sheath 21 and lengthening its length l.

[Problem to be Solved by the Invention] However, if the ejection flow rate of the bubble generator is simply increased, the discharge pressure of the pump 5 must be increased, which increases the size and cost of the pump. However, the power consumption increases, which is uneconomical. On the other hand, in order to increase the jetting flow rate of the bubble generator without changing the pump, it is necessary to reduce the inner diameter d of the jetting port 41a, but with this configuration, the jetting flow rate naturally decreases, and the defuse - The force of the bubble flow 51 ejected from the massager 21 is also weakened, and the massage effect is reduced. In addition, increasing the size of the diffuser 21 leads to an increase in the size of the entire device, and when the bubble generator is installed in a limited space such as a bathtub, it is not preferable because it adds space constraints. SUMMARY OF THE INVENTION An object of the present invention is to provide an improved bubble generating device that can significantly increase the amount of air taken into this type of device even though the configuration and installation space are almost the same as those of conventional devices.

[Means for Solving the Problems] The object is to solve the problems by pump 5 (
Please refer to the drawing for the symbols. (same below) on the discharge side
1a, and an intake port 1 that takes in air using the negative pressure generated by the jet of water from the nozzle 11.
5, and a diffuser 21 that mixes the suction air and the water stream and injects the mixture into the water,
A plurality of auxiliary jet ports 11b are provided around the jet port 11a, and the axis 12b of the plurality of auxiliary jet ports 11b is set at an angle with respect to the main jet port 11a. This is achieved by concentrating the axes 12a, 12b of the outlet 11a and the auxiliary ejection port 11b at one point on the discharge side.

[Operation] In the above structure, the jets from the main jet nozzle 11a and the auxiliary jet nozzle 11b are jetted at high speed as the main jet 18a and the auxiliary jet 18b having circular cross sections. Then, the auxiliary jet stream 18b flows along the auxiliary jet port 11b.
Since it is injected toward the main jet 18a, this main jet 1
8a, and at this time, the auxiliary jet 18
Due to the viscosity on the jet surface of b, the surrounding air is dragged and absorbed into the main jet 18a, and the first intake is performed. In addition, the main jet 18a and the auxiliary jet 1
The jet after collision with 8b becomes a deformed combined water flow 19,
The circumference of the combined water stream 19 in contact with the air in the diffuser 21 is significantly greater than the circumference 91 of a circle with the same cross-sectional area. In other words, the water flow 19 combined with the water 3 in the target tank 1
When the two collide, for the same reason as explained above, the air surrounding the combined water flow 19 is dragged by the viscosity on the jet surface of the combined water flow 19 and absorbed into the jet, and the second intake air is carried out.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on the illustrated embodiments, taking as an example the case where the present invention is applied to a bathtub. As shown in FIG. 2, the bathtub 1 to which the bubble generator 10 is attached and the pump 5 are connected through a suction pipe 6 and a discharge pipe 7. The bubble generator 10 also includes an intake pipe 8.
is connected. When the pump 5 is operated, the water 3 in the bathtub 1 is pressurized by the pump 5 and sent to the bubble generator 10. Then, due to the negative pressure generated within the bubble generator 10, the air sucked in from the intake pipe 8 and the ejected water are mixed to form a bubble flow 51, which is injected from the diffuser 21. Next, the structure of the bubble generator 10 will be explained in detail with reference to FIGS. 1 and 4. As shown in FIG. , through the packing 31, the fixture 32
It is attached to the bathtub 1 by. In addition, the main body 13
As clearly shown in FIG. 2, a nozzle 11 having a main nozzle 11a and an auxiliary nozzle 11b is built in, and the axis 12b of the auxiliary nozzle 11b is aligned with the axis 12a of the main nozzle 11a. On the other hand, the axes 12a and 12b are angled and intersect at one point on the discharge side. An intake port 15 is provided between the nozzle 11 and the diffuser 21. The diffuser 21 is attached to the main body 13 by a protective cap 25. Here, the operation of this embodiment will be explained. When pressurized water is sent to the connection port 16, the jets from the main jet port 11a and the auxiliary jet port 11b are formed into a main jet flow 18 with a circular cross section at high speed.
a and an auxiliary jet stream 18b. and,
Since the auxiliary jet 18b is injected toward the main jet 18a along the auxiliary jet 11b, it collides with the main jet 18a, and at this time, due to the viscosity on the jet surface of the auxiliary jet 18b, The surrounding air is dragged and absorbed into the main jet 18a, and the first intake is performed. Furthermore, the jet after the collision between the main jet 18a and the auxiliary jet 18b becomes a deformed combined water flow 19 as shown in FIG. The circumferential length of the circular shape 91 increases significantly. In other words, when the combined water flow 19 collides with the water 3 in the bathtub 1, the air around the combined water flow 19 is dragged by the viscosity on the jet surface of the combined water flow 19 for the same reason as explained above. The air is absorbed into the jet and a second intake is performed, so the amount of air drawn into the jet is significantly increased compared to the conventional case. As a result, the amount of bubbles contained in the bubble flow 51 also increases, and the amount of ultrasonic waves generated also increases. Furthermore, the combined water flow 19 shown in FIG. 1 collides with the water in the diffuser 21 which has flowed back due to the water level difference in the bathtub 1 in a spread state. Since it is larger than when the nozzle 41 of the bubble generator 40 is used, the collision energy per unit area can be kept small, and accordingly, the collision sound of the combined water stream 19 can also be reduced. 7 to 9 show a comparison of the air intake characteristics, ultrasonic generation level characteristics, and noise level characteristics when using the bubble generator 10 and the conventional bubble generator 40 shown in FIG. 3, respectively. Another embodiment of the present invention is shown in FIGS. 10 and 11, and the difference between this embodiment and the previous embodiment is that the main ejection port 11a and the auxiliary ejection port 11b of the nozzle 11 are communicated with each other in a radial shape. According to this configuration, even if the bubble generator is installed in water containing small foreign objects, those foreign objects will not flow into the communicating jet ports 11a and 11b, that is, the communicating jet ports 11a and 11b having a large cross-sectional area. The same effect as the previous embodiment can be achieved without being caught. Furthermore, according to this embodiment, the main ejection port 11a and the auxiliary ejection port 11b of the nozzle 11 are made to communicate with each other in a radial manner, so that when the nozzle 11 is formed of a resin material, a slide core is not required. This simplifies the configuration of the mold and reduces the manufacturing cost of the bubble generator.

Effects of the Invention The present invention has been described above, and as is clear from the explanation of the illustrated embodiments, according to the present invention, even if the configuration and installation space are almost the same as the conventional ones, the generation of bubbles can be prevented. This device can significantly increase the amount of air taken into the device, and if used by installing it in a bathtub, for example, it will improve the massage effect, cleaning effect, and thermal effect on the human body, as well as reduce noise. This allows for comfortable bathing.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a bubble generator 10 according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram when the bubble generator 10 is installed in a bathtub.

FIG. 3 is a longitudinal cross-sectional view of a conventional bubble generator 40. FIG.

FIG. 4 is a partially cutaway perspective view of the nozzle designated by the reference numeral 11 in FIG. 1;

5 is a partially cutaway perspective view of the nozzle designated by 41 in FIG. 3; FIG.

6 is a cross-sectional view of a combined water stream 19 injected from the nozzle 11 shown in FIG. 1. FIG.

FIG. 7 is an intake characteristic diagram of the bubble generator 10 according to the present invention and the conventional bubble generator 40.

FIG. 8 is an ultrasonic generation level characteristic diagram of the bubble generator 10 according to the present invention and the conventional bubble generator 40.

FIG. 9 is a noise level characteristic diagram of the bubble generator 10 according to the present invention and the conventional bubble generator 40.

FIG. 10 is a longitudinal sectional view of a nozzle 11 showing another embodiment of the present invention.

11 is a partially cutaway perspective view of the nozzle 11 shown in FIG. 10. FIG.

[Explanation of symbols]

10...Bubble generator 11...Nozzle 11a...Main spout 11b...Auxiliary spout 12a...Axis of main jet port 11a 12b...Axis of the auxiliary jet nozzle 11b 13...Bubble generator body 15...Intake port 21... Diffuser

Claims (2)

[Claims] 1. A nozzle 11 having a jetting port 11a on the discharge side of the pump 5, an intake port 15 which takes in air by the negative pressure generated by the jetted water flow from the nozzle 11, and a pump that mixes the suctioned air and the water jet. Defu spraying into the water
In the bubble generator having the jet nozzle 21,
A plurality of auxiliary ejection ports 11b are provided around the main ejection port 1a, and the axis 12b of the plurality of auxiliary ejection ports 11b is made to have an angle with respect to the main ejection port 11a. Auxiliary spout 11b
A bubble generator characterized in that axes 12a and 12b of the bubble generator are concentrated at one point on the discharge side. 2. The bubble generating device according to claim 1, wherein the main ejection port 11a and the plurality of auxiliary ejection ports 11b are connected and formed in a radial shape.