JP3264712B2 - Bubble generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is used for, for example, dissolving the air in the atmosphere under pressure into hot water in a bathtub and then sending the hot water again into the bathtub to generate fine bubbles in the bathtub. The present invention relates to a bubble generating device to be used.

[0002]

2. Description of the Related Art Conventionally, in this type of bubble generating apparatus, FIG.
As shown in (1), hot water W is sucked into the pump 34 from the suction port 32 of the bathtub 31 via the pipe line 33, and air is sucked into the pump 34 from the air suction port 35 connected to the suction port of the pump 34. A self-priming air separation box (not shown) is directly connected to the discharge port of the pump 34. The self-priming air separation box stores a predetermined amount of water at all times, supplies priming water at the start of driving of the pump 34, and prevents the negative pressure generated by the pump 34 from decreasing. . Then, after the air is dissolved in the hot water W in the pump 34, the hot water W in the pump 34 is sent under pressure from the self-priming air separation box to the melting tank 37 via the pipe 36.

As shown in FIG. 6, hot water W discharged from a self-priming air separation box is fed into the melting tank 37 from an inflow port 38 of the melting tank 37. Then, after the undissolved excess air is separated from the hot water W in the dissolution tank 37, the excess air W is discharged out of the apparatus from a reduction port 39 formed in an upper portion of the dissolution tank 37. On the other hand, hot water W containing dissolved air flows from discharge port 40 to conduit 41.
Is discharged into the bathtub 31 through the bath, fine bubbles are generated in the bathtub 31, and the hot water W is milked.

[0004]

However, in the above-mentioned fine bubble generating apparatus, the space between the bathtub 1 and the pump 34, or between the pump 34 (self-priming air separation box) and the dissolving tank 3 are provided.
7, and between the dissolution tank 37 and the bathtub 31 are connected by conduits 33, 36, and 41, respectively. As described above, in the above-described microbubble generator, since the number of conduits is large, the entire apparatus becomes large, and it may be difficult to mount the apparatus in a narrow place or it may not be possible to install the apparatus.

In the dissolving tank 37, surplus air may not be separated from the hot water W but may be discharged from the discharge port 40 to the pipeline 41 together with the hot water W. In this case, fine bubbles are less likely to be generated in the bathtub 31 and the milky whiteness of the hot water W is also reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to eliminate the necessity of a dissolving tank, to reduce the size of the entire apparatus, to be able to be mounted even in a narrow place, and to assure the liquid. An object of the present invention is to provide a bubble generator capable of generating fine bubbles in a storage tank.

[0007]

In order to achieve the above object, according to the present invention, there is provided a pump provided with a self-priming air separation box for priming on a discharge port side, and a liquid in a liquid storage tank, After inhaling gas from the outside and dissolving the gas into the liquid under pressure, the liquid is discharged from the self-priming air separation box into the liquid storage tank to generate fine bubbles in the liquid storage tank. The gist of the present invention is to provide an air bubble generator having a discharge port for discharging surplus air not pressurized and dissolved in the pump to the outside above the self-priming air separation box.

[0008]

According to the above arrangement, when the pump is driven, liquid is sucked into the pump from the liquid storage tank and gas is sucked from the outside. At this time, since the pump is provided with a self-priming air separation box, a decrease in pump efficiency is prevented even at the start of driving the pump, and liquid and gas are reliably sucked into the pump. Then, after the gas is pressurized and dissolved in the liquid in the pump, the liquid is discharged from the discharge port of the pump into the self-priming air separation box. In the self-priming air separation box, excess gas not dissolved in the pump is discharged to the outside from a discharge port, and a liquid containing only dissolved gas is discharged to a liquid storage tank. As a result, since no surplus gas is discharged into the liquid storage tank, fine bubbles are reliably generated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention embodied in a bubble generator for a bath tub will be described below with reference to FIGS.

FIG. 1 is a schematic circuit diagram of a bubble generating apparatus according to this embodiment. As shown in the drawing, hot water W as a liquid is stored in a bathtub 1 as a liquid storage tank. In addition, a suction port 2 and a jet port 3 are formed vertically on the side wall of the bathtub 1. In addition, a filter (not shown) is provided in the suction port 2 and the ejection port 3. A pump 5 is connected to the suction port 2 via a suction pipe 4. FIG.
As shown in FIG. 3 and FIG. 3, an air suction port 6 for sucking air as a gas from outside air is provided near the suction port 5a of the pump 5. The air inlet 6 has
A check valve (not shown) for preventing backflow of the hot water W in the suction pipe 4 and the pump 5 is provided.

Further, in this embodiment, a Wesco pump (vortex pump) is used as the pump 5. As shown in FIG. 2, a rotor 8 is accommodated in a casing 7 of the wesco pump 5 so as to be rotatable by a motor (not shown). A plurality of blades 9 are formed on the rotor 8, and a large number of grooves 10 are formed on the outer periphery thereof. When the rotor 8 is rotated, friction is generated between the blades 9 and the grooves 10, so that air and hot water W
Is sucked into the casing 7. The pressure of the wesco pump 5 is set to a low pressure of 3 kg / cm ² .

As shown in FIGS. 1 and 3, a self-priming air separation box 12 is directly connected to a discharge port 11 of the pump 5 by bolts (not shown). A nozzle 15 communicating between the pump 5 and the inside of the self-priming air separation box 12 is formed upward on the bottom surface of the self-priming air separation box 12. A discharge port 19 is formed on a side wall of the self-priming air separation box 12 at a position higher than the nozzle 15. A discharge pipe 20 communicates between the discharge port 19 and the jet port 3 of the bathtub 1. In addition, a reduction port 21 as a discharge port is formed in the upper part of the self-priming air separation box 12, and the reduction port 21 and the suction pipe 4 are connected by a reduction pipe 22.

As shown in FIGS. 3 and 4, a narrow nozzle 23 is provided in the vicinity of the reducing line 22 where it merges with the suction line 4.
Are arranged. The small hole nozzle 23 is formed of a disk-shaped sheet packing 26 having an inflow hole 24 and a discharge hole 25 having different diameters. The inflow hole 24 is formed in a tapered shape having a smaller diameter toward the discharge hole 25. Also,
The discharge hole 25 is formed to have the same diameter as the diameter of the minimum diameter portion of the inflow hole 24, and the inflow hole 24 and the discharge hole 25 are in communication.

Next, the operation of the air bubble generator configured as described above will be described. First, when the pump 5 is driven, hot water W in the bathtub 1 is sucked into the pump 5 from the suction port 2 and air is sucked into the pump 5 from the air suction port 6 by the suction force of the pump 5. At this time, the discharge port 1 of the pump 5
1 is held in a closed state by hot water (water) W constantly stored in the self-priming air separator box 12,
A negative pressure is reliably generated in the suction port 5a of the pump 5. That is, since a decrease in pump efficiency at the start of pump driving is prevented, the hot water W
And air are surely sucked into the pump 5.

The air sucked into the pump 5 is dissolved under pressure into the hot water W, and the hot water W containing the dissolved air is discharged from the discharge port 11 of the pump 5 through the nozzle 15 into the air separating box 12 for self-priming. Is discharged. In the air separation box 12 for self-priming, air that is not pressurized and dissolved by the pump 5 is reliably separated from the hot water W as surplus air. The excess air separated from the hot water W is supplied from the reduction port 21 to the reduction line 2.
2 and is returned to the suction line 4.

Here, the reason why surplus air is reliably separated from the hot water W in the self-priming air separation box 12 will be described. Hot water W discharged from the discharge port 11 of the pump 5
Is discharged from the nozzle 15 into the self-priming air separation box 12, and the outlet of the nozzle 15 is formed in an upward direction different from the direction toward the discharge port 19. Therefore, even if surplus air is vigorously discharged from the outlet of the nozzle 15 together with the hot water W, since the direction of the surplus air is upward, the surplus air is not discharged from the discharge port 19 together with the hot water W. . As a result, the hot water W containing only the dissolved air is discharged from the discharge port 19, so that fine bubbles are reliably generated in the bathtub 1 and the hot water W is opalified.

On the other hand, the excess air discharged from the reduction port 21 is sucked into the suction pipe 4 from the reduction pipe 22 through the fine nozzle 23. At this time, when the excess air is sucked into the suction pipe 4 from the reduction pipe 22, the excess air passes through the fine hole nozzle 23, thereby increasing the flow speed thereof. Then, in this state, the excess air is vigorously jetted from the discharge hole 25 into the suction pipe 4, so that the excess air strongly collides with the hot water W flowing in the suction pipe 4, and the excess air is subdivided. Is done. The finely divided excess air is supplied to the suction line 4
Then, it is mixed with hot water W and dissolved in the pump 5 again under pressure.

At this time, in the present embodiment, it is possible to dissolve the air under pressure despite the fact that the pressure of the pump 5 is set to a low pressure of 3 kg / cm ² as described above. That is, before the excess air is sucked into the pump 5, the excess air is subdivided in advance, so that the excess air can be easily dissolved under pressure in the pump 5, and even if the pressure of the pump 5 is set low. In addition, excess air can be easily dissolved under pressure. As a result, in this embodiment, the electric power of the motor for driving the pump 5 can be reduced, which is very economical.

As described above, in the present embodiment, since the reduction port 21 is provided above the self-priming air separation box 12, the reduction of the pump efficiency at the start of driving the pump is prevented while the dissolved air is contained. Undissolved excess air can be separated from the hot water W.

That is, in the present embodiment, the self-priming air separation box 12 can serve both to prevent a decrease in pump efficiency at the start of driving and to function as a dissolving tank described in detail in the prior art. As a result, the number of connecting pipes can be reduced, and a separate melting tank is not required, so that the cost can be significantly reduced. Further, since the entire apparatus can be reduced in size, it can be easily installed in a narrow place.

Further, in this embodiment, the opening direction of the nozzle 15 for guiding the hot water W from the pump 5 into the self-priming air separator box 12 is formed so as to face upward, which is different from the direction toward the discharge port 19. In addition, the separated excess air is not discharged from the discharge port 19 together with the hot water W. As a result, the hot water W containing the dissolved air is discharged from the discharge port 19.
Since only the liquid is discharged, fine bubbles are reliably generated in the bathtub 1 and the hot water W can be milked.

Further, in this embodiment, a Wesco pump is used as the pump 5 and a fine hole nozzle 23 is provided in the reduction conduit 22, so that the electric power of the motor for driving the pump 5 can be reduced even if the electric power of the motor is low. It is very economical because pressure dissolution can be performed. Further, by using the Wesco pump, the air and the hot water W enter the groove 10 formed on the outer periphery of the blade 9, so that they serve as a soundproof film, so that noise at the time of driving the pump can be reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and may be configured as follows, for example, without departing from the spirit of the invention. (1) In the above embodiment, the liquid storage tank is embodied in the bathtub 1, but this is embodied in a water tank or the like, or bubbles are generated using water or a liquid containing various components instead of the hot water W. It may be embodied in a device. Further, air as a gas may be embodied by a bubble generator using oxygen, carbon dioxide, or the like.

(2) In the above embodiment, the suction port 2 and the jet port 3 are provided on the same side wall of the bathtub 1.
May be provided on the bottom surface of the nozzle, or may be provided on a wall surface facing the ejection port 3.

(3) The hole shape of the nozzle 23 is tapered.

[0026]

As described in detail above, according to the present invention,
Since the number of connecting lines is reduced and no dissolution tank is required,
Since the cost can be significantly reduced and the entire apparatus can be downsized, it can be easily installed in a narrow place. Further, there is an excellent effect that fine bubbles can be reliably generated in the liquid storage tank.

[Brief description of the drawings]

FIG. 1 is a schematic circuit diagram of a microbubble generator embodying the present invention.

FIG. 2A is a partial front sectional view of a casing and a rotor of a Wesco pump. (B) is a partial plan view of the rotor. (C) is a partial side view of the rotor.

FIG. 3 is a partial sectional view of a pump and a self-priming air separation box.

FIG. 4 is a sectional view of a suction line, a reduction line, and a fine-hole nozzle.

FIG. 5 is a schematic circuit diagram of a conventional microbubble generator.

FIG. 6 is a sectional view of a conventional melting tank.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bath tank as a liquid storage tank, 2 ... Suction port, 3 ... Spout port, 5 ... Pump, 11 ... Pump discharge port, 12 ... Self-priming air separation box, 15 ... Nozzle, 21 ... Reduction as discharge port Port, W ... hot water as liquid

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61H 23/00

Claims (1)

(57) [Claims] 1. A pump provided with a self-priming air separation box for priming at a discharge port side to suck a liquid in a liquid storage tank and a gas from the outside, respectively, and pressurize and dissolve the gas in the liquid. After that, the liquid is discharged from the self-priming air separation box into the liquid storage tank to generate fine bubbles in the liquid storage tank. And a discharge port for discharging surplus air not pressurized and dissolved in the pump to the outside.