JPH06142153A - Bubble generating device for bathtub - Google Patents

Abstract

PURPOSE:To return circulating water containing clean minute bubble to a bathtub by combining a bubble generating device using a hollow thread and a filtering device. CONSTITUTION:The device is constituted by providing a suction port 2 in a position being near the surface of the water of a bathtub 1, connecting a suction side of a pump 5 to this suction port 2, connecting an outlet side of this pump 5 to a return port 3 provided in a bottom part side of the bathtub 1 through a filtering device 6 using a natural stone filter and a hollow thread cartridge 7, and also, connecting a bypass tube 9 to the hollow thread cartridge 7 through a direction changeover valve 10, and moreover, providing a check valve between the downstream side of the hollow thread cartridge 7 and the bypass tube 9.

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 bath for generating extremely fine bubbles in the bath.

[0002]

2. Description of the Related Art As a conventional device for generating extremely fine bubbles in a bathtub, a bubble generating device using a pressure reducing method, a bubble generating device also using a porous filter, and Japanese Patent Laid-Open No. Hei 3 (1999) -311. There is a bubble generating device using a hollow fiber as disclosed in No. 12157. In any of the above cases, since the bubble diameter is extremely small, it is possible to supply a large amount into the bath while maintaining the fine bubble state without growing fine bubbles in the bath. Therefore, not only the sensible temperature becomes higher than that of still water, but the massage effect on the human body is further improved. The pore size of the human body is said to be about 100 microns, but it is known that the pores further expand when heated. Therefore, since fine bubbles of 100 microns or less can be expected to have a cleaning effect on the human body when taking a bath, it can be said that it is preferable not only for the current trend of health, but also for commercial use and at home.

[0003]

However, it can be said that the improvement of the cleaning effect means that the dust and dirt that are finer than the human body are mixed into the bath water. Further, since dissolved enzymes in the bath water increase due to the fine bubbles, there is a problem that various bacteria will rapidly propagate when the circulating water is exhausted.
For this reason, the bath water must be replaced frequently.

The present invention has been conceived in view of the above, and a combination of a bubble generating device using a hollow fiber and a filtering device is capable of returning clean circulating water containing fine bubbles to a bath bubble. It is intended to provide a generator.

[0005]

In order to achieve the above object, a bathtub bubble generating apparatus according to the present invention is provided with a suction port 2 at a position close to the water surface of a bathtub 1, and a pump 5 is provided at this suction port 2.
The suction side of the pump 5 is connected, and the outlet side of the pump 5 is connected to the return port 3 provided on the bottom side of the bath 1 through the filtration device 6 using a natural stone filter and the hollow fiber cartridge 7, and the hollow fiber cartridge described above. The bypass pipe 9 for 7 is connected via a direction switching valve 10, and a check valve 11 is provided between the bypass pipe 9 and the downstream side of the hollow fiber cartridge 7.

[0006]

[Operation] When the pump 5 is driven with the direction switching valve 10 switched to the hollow fiber cartridge 7 side, the hot water in the bath 1 is sucked from the water surface side thereof and filtered by the filtration device 6. The filtered hot water is supplied to the three-way switching valve 10
After reaching the hollow fiber cartridge 7, fine air bubbles are mixed therein and returned to the bath 1 through the return port 3. An extremely large number of fine bubbles are mixed in the warm water returned from the return port 3, and the bubbles rise in the bathtub 1 while diffusing.

[0007]

EXAMPLES Examples of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which 1 is a bathtub, and the bathtub 1 has a suction port 2 on a side wall slightly lower than a prescribed water surface and a side wall near the bottom. Each has a return port 3. A suction pipe 4 is connected to the suction port 2, and the suction pipe 4 is connected to an inlet side of a filtering device 6 via a pump 5. The outlet side of the filtering device 6 is connected to the return port 3 by a return pipe 8 having a hollow fiber cartridge 7 interposed therebetween. Further, a bypass pipe 9 for bypassing the hollow fiber cartridge 7 is connected to the return pipe 8 by branching the upstream side thereof by a direction switching valve 10. A check valve 1 for preventing backflow from the bypass pipe 9 is provided downstream of the hollow fiber cartridge 7.
1 is installed.

As the filter of the filtering device 6, natural stone generally used as a filter for filtering hot water is used. Although not shown in the drawing, the hollow fiber cartridge 7 exists in the hollow fiber wall by immersing a large number of hollow fibers in the flow path of hot water and supplying the air from the compressor 12 to the inside of each hollow fiber. Fine bubbles are formed from a large number of fine holes and are mixed in the warm water.

In the above structure, when the pump 5 is driven with the direction switching valve 10 switched to the hollow fiber cartridge 7 side, the warm water in the bath 1 is sucked in from the water surface side thereof.
It is filtered by the filtering device 6. Then, the filtered hot water reaches the hollow fiber cartridge 7 through the direction switching valve 10.
Here, fine bubbles are mixed and returned to the bathtub 1 through the return port 3. An extremely large number of fine bubbles are mixed in the warm water returned from the return port 3, and the bubbles rise in the bathtub 1 while diffusing.

At this time, the fine dust-like graphic object in the bathtub 1 rises due to the air lift effect generated when the fine bubbles rise. On the other hand, since the suction port 2 is provided at a position close to the water surface of the bathtub 1, the fine dust-like graphic object that has risen as described above is sucked from the suction port 2 and filtered by the filtering device 6.

Although natural stone is used for the filter of the filtration device 6, it is known that this filter has a bactericidal action of bacteria contained in warm water in addition to the filtration action. This bactericidal action is performed by eating and decomposing sweat and dirt in warm water by aerobic microorganisms parasitic on natural stone. In addition, it is known that the aerobic microparticles become active in their reproduction and activity by increasing the amount of dissolved enzyme. Therefore, during the operation of generating fine bubbles, bath water having an increased dissolved enzyme amount flows into the filtration device 6, so that not only mechanical filtration of solid matter but also propagation of microorganisms and its activity are performed here. Is more active, the filtration efficiency is improved, and clogging is less likely to occur.

On the other hand, the hollow fiber cartridge 7 comprises a filtering device 6
Since it is connected to the downstream side of the, it will be generated by purified warm water during the microbubble generation operation, but when the microbubble generation operation is stopped, bacteria will be present in the bath water in which the amount of dissolved enzyme has increased due to the microbubbles. I know it will start breeding soon.

Therefore, when it is desired to stop the operation of generating fine bubbles, the directional control valve 10 is switched to the bypass pipe 9 side, the pump 5 is operated for a certain period of time, and only the filtering device 6 is made to function to purify the bath water.

FIG. 2 shows another embodiment of the present invention.
The reheating device 13 is connected to the downstream side of the filtering device 6, and the 24-hour bath device 14 is used.

[0015]

According to the present invention, the following operational effects can be obtained. (1) The bath water can be efficiently purified by the air lift effect of the fine bubbles. (2) Since the efficiency of a general natural stone filter can be improved, it can be realized with a small capacity circulation pump. (3) Since the generation of fine bubbles by the hollow fiber cartridge can be performed by circulating water after filtration, the maintenance life of the hollow fiber cartridge can be greatly extended. (4) By having the maintenance circuit of the hollow fiber cartridge, the purification of bath water can be maintained for a long time easily and inexpensively. (5) Since the components are simple and modular, it is easy to install and the bubble generating apparatus for bathtub can be realized at low cost.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the present invention.

[Explanation of symbols]

1 ... tub, 2 ... suction port, 3 ... return port, 4 ... suction pipe, 5 ...
Pump, 6 ... Filtration device, 7 ... Hollow fiber cartridge, 8 ...
Return pipe, 9 ... Bypass pipe, 10 ... Three-way switching valve, 11 ...
Check valve, 13 ... Compressor, 13 ... Reheating device, 14 ...
24-hour bath equipment.

Claims (1)

[Claims] 1. A suction port 2 is provided at a position close to the water surface of a bath 1, a suction side of a pump 5 is connected to the suction port 2, and an outlet side of this pump 5 is hollow with a filtering device 6 using a natural stone filter. The hollow fiber cartridge 7 is connected to the return port 3 provided on the bottom side of the bath 1 via the system cartridge 7.
The bypass pipe 9 is connected to the bypass pipe 9 via the direction switching valve 10, and the check valve 11 is provided between the bypass pipe 9 and the downstream side of the hollow fiber cartridge 7.