JPH04100526A - Apparatus for generating minute air bubbles - Google Patents

Abstract

PURPOSE:To prevent a liquid or dust from entering a discharge pipe and to discharge only excessive air by discharging only the excessive air to the discharge pipe and providing a liquid invasion preventing means to an accumulator. CONSTITUTION:Air is supplied to a liquid supply pipe 1 by the air supply pipe 2 connected to the liquid supply pipe 1 through which air passes and air is dissolved in the liquid under pressure by the pressure pump 3 provided on the way of the liquid supply pipe 1. Further, undissolved air is separated by an accumulator 4 and the excessive air separated by the accumulator 4 is discharged by a discharge pipe 5. A liquid invasion preventing means 6 discharging only excessive air to the discharge pipe 5 to prevent the invasion of the liquid is provided to the accumulator 4. As a result, no liquid or dust enters the discharge pipe discharging the excessive air separated in the accumulator and only the excessive air can be discharged.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is a method for generating fine bubbles by dissolving a gas such as air or carbon dioxide in a liquid such as water under pressure, and then precipitating fine bubbles by reducing the pressure. It is related to the device.

[Prior Art] Conventionally, fine bubbles can be precipitated by dissolving a gas such as air or carbon dioxide in a liquid such as water under pressure, and then reducing the pressure of the liquid in which the gas has been dissolved under pressure. a! Various fine gas generation devices WtA are provided. For example, as shown in FIG. 15, this microbubble generator A includes a liquid supply pipe 1 through which liquid passes, a gas supply pipe 2 connected to the liquid supply pipe 1, and a part provided in the middle of the liquid supply pipe 1. It is equipped with a pressure pump 3 that pressurizes the liquid and dissolves gas in the liquid, and an accumulator 4 that separates excess gas that cannot be completely dissolved by the pressure pump 3. Excess gas separated by the accumulator 4 is discharged from the discharge pipe 5 through a discharge section 5a constituted by a throttle valve provided. In addition, a device as shown in Fig. 16 is also provided, in which the discharge pipe 5 is connected to the gas supply pipe 2, and the surplus air wood separated by the accumulator 4 is recycled as the supply gas. It is now available for use.

[Problems to be Solved by the Invention] By the way, in the accumulator 4 that separates surplus gas, undissolved surplus gas becomes a large amount of bubbles and floats to the liquid surface inside the accumulator 4, resulting in a drop in the liquid level. is wavy and violently disordered. Therefore, in the conventional example as described above, when the amount of gas dissolved in the pressurizing pump 3 increases due to pressure fluctuations and the liquid level temporarily rises, or when excess gas is recovered. In the case of reuse, when the amount of gas in the accumulator 4 decreases over time and the water level rises, droplets generated due to turbulence on the water surface scatter. Here, if there is no limit to the height of the rising part 4a of the accumulator 4 from which the discharge pipe 5 is extended, if the height of the rising part 4a is increased, the scattered water droplets will enter the discharge pipe 5. However, if there is a limit to the height of the rising portion 4a, the scattered droplets will enter the discharge pipe 5. If the liquid thus scattered enters the discharge pipe 5, the discharge part 5a for discharging excess gas will be blocked by the liquid, and the pressure within the accumulator 4 will rise excessively, preventing the accumulator 4 from operating normally. I won't. Moreover, since the liquid that has entered the discharge pipe 5 is not discharged to the outside, there is a risk that it may freeze in the winter. Furthermore, when the liquid begins to enter the discharge pipe 5 and νA, floating objects such as dust and hair in the liquid flowing into the accumulator 4 enter the discharge pipe 4 when the water level rises, and the discharge pipe 5 Alternatively, the discharge portion 5a constituted by a throttle valve may be closed, and exhaustion may no longer be performed, resulting in an excessive rise in pressure within the accumulator 4, resulting in damage to the accumulator 4.

The present invention attempts to solve the above problems, and its purpose is to prevent liquids, dirt, etc. from entering the discharge pipe that discharges the surplus gas separated in the accumulator, and to discharge only the surplus gas. The purpose of the present invention is to provide a microbubble generating device that can generate microbubbles.

[Means for Solving the Problems] In order to achieve the above object, the microbubble generating device A of the present invention includes a liquid supply pipe 1 through which a liquid passes, and a liquid supply pipe 1 that is connected to the liquid supply pipe 1. A gas supply pipe 2 that supplies gas into the liquid supply pipe 1, a pressure pump 3 that is connected to the liquid supply pipe 1 and dissolves the gas under pressure in the liquid, an accumulator 4 that separates undissolved gas, and an accumulator 4 that separates undissolved gas. In the fine bubble generating device, the device includes a discharge pipe 5 for discharging the excess gas separated in step 4, and a liquid intrusion prevention means 6 for discharging only the surplus gas to the discharge pipe 5 and preventing liquid intrusion into the accumulator, 4.

[Function] That is, in the present invention, a liquid intrusion prevention means 6 is provided in the accumulator 4 that separates excess gas, and only the gas is discharged to the discharge pipe 5 by the liquid intrusion prevention means 6.
Since the liquid is prevented from entering the discharge pipe 5, only the excess gas separated by the accumulator 4 is discharged from the discharge pipe 5, and the liquid does not enter the discharge pipe 5.
This prevents dirt from entering the liquid along with the liquid.
It is possible to prevent the discharge pipe 5 from being in a closed state.

[Implementation PA] Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows a primary embodiment of the micro-bubble generator A, which is attached to a bathtub as a liquid tank 7, and shows an embodiment in which micro-bubbles are ejected into the bathtub. be.

The micro bubble generator A mixes gas and liquid and pressurizes the mixture to dissolve the gas in the liquid, and then depressurizes the liquid again to generate micro bubbles. 7, a liquid supply pipe 1 through which liquid passes, a gas supply pipe 2 connected to the liquid supply pipe 1 and supplying gas into the liquid supply pipe 1, and a gas supply pipe 2 in the middle of the liquid supply pipe 1. A pressurizing pump 3 is provided to pressurize and dissolve gas in the liquid, an accumulator 4 separates undissolved gas, a discharge pipe 5 discharges the excess gas separated by the accumulator 4, and only the surplus gas is discharged to the discharge pipe 5. It has an oval configuration with a liquid intrusion prevention means 6 for discharging and preventing liquid from entering.

The liquid supply pipe 1 has one end connected to the water suction lower a of the liquid tank 7, and the other end connected to the water discharge lower b of the liquid tank 7, and the water in the liquid tank 7 absorbed from the water suction lower a is Water passes through the liquid supply pipe 1 and is again spouted into the liquid tank 7 from the water spouting lower b. The pressure pump 3 is provided in the middle of the liquid supply pipe 1, and the pressure pump 3 is capable of sucking water in the liquid tank 7 from the water suction lower a and discharging it from the water discharge lower b. A gas supply pipe 2 that supplies gas such as air or carbon dioxide to the liquid supply pipe 1 is connected to a pressure pump 3 and a water suction lower a.
It is connected to the liquid supply pipe 1 between. An accumulator 4 that separates liquid and surplus gas is placed between the pressure pump 3 and the water discharging lower b, and the top of the accumulator 4 is provided with a rising portion 4a in which the separated surplus gas accumulates. A discharge pipe 5 for discharging excess gas is led out from the portion 4a. This discharge pipe 5 is provided with a discharge part 5a such as a throttle valve, so that the excess gas in the accumulator 4 is discharged through the discharge pipe 5 while being regulated by the discharge part 5a.

The generation of microbubbles in the liquid in the liquid tank 7 is performed as follows. When the bath water in the liquid tank 7 is sucked into the liquid supply pipe l from the water suction lower a by the pressurizing pump 3, air from the gas supply pipe 2 is drawn into the liquid supply pipe 1 by the flow of liquid passing through the liquid supply pipe 1. The gas is sucked into the bath water, mixed with the bath water, and pressurized by the pressurizing pump 3 to dissolve the gas in the bath water under pressure. At this time, in order to increase the efficiency of air dissolution by the pressure pump 3, it is necessary to supply an excess amount of gas relative to the amount of gas actually dissolved. of undissolved gas is present. Therefore, the excess gas is separated in the accumulator 4 and is discharged through the discharge part 5a of the discharge pipe 5 led out from the accumulator 4.

At this time, the discharge portion 5a, which is constituted by a throttle valve, adjusts the displacement amount so that the pressure within the accumulator 4 does not become significantly reduced. In other words, the bath water in which air has been dissolved is sent to the water spout lower b through the liquid supply pipe 1 in a pressurized state, but during this process, when passing through the accumulator 4, In addition to having the general function of absorbing the pulsation of the bath water and reabsorbing the impact pressure, it also promotes the dissolution of air that has not been completely dissolved by the pressurization in the pressure pump 3, and still dissolves the air. The function is to separate excess gas mixed in the bath water from the bath water by floating the excess gas mixed in the bath water to the upper part of the accumulator 4.
The system is designed to prevent all excess gas inside from being exhausted. The bath water that has passed through the accumulator 4 has a high concentration of gas dissolved in it, and the bath water in which the gas has been dissolved in a high concentration is again spouted into the bathtub from the water spout lower b. When the bath water with gas dissolved in it is squirted into the bathtub from b, the pressure in the bath water goes from being pressurized to being released all at once.As a result, the gas dissolved in the bath water precipitates and forms fine bubbles. This is what occurs in the bath water in the bathtub. Here, a liquid intrusion prevention means 6 is provided in the accumulator 4 to discharge only excess gas into the discharge pipe 5 and prevent liquid from entering the discharge pipe 5. Only gas is discharged from the discharge pipe, and the liquid in the accumulator 4 is prevented from entering the discharge pipe 5 together with excess gas by the liquid intrusion prevention means 6. ing.

In the case shown in FIG. 2, the liquid intrusion prevention means 6
One embodiment is shown in which the accumulator 4 has an oval shape with a partition plate 6a provided on the body portion. As shown in FIG. 3, this partition plate 6a is formed into a substantially T-shape, and has a vent hole 6a' in the upper part through which excess gas passes, and a gap part 6a in the lower part through which liquid passes. - is provided. As shown in FIG. 2, this partition plate 6a is arranged approximately in the middle of the body part, and the partition plate 6a partitions the inside of the accumulator 4 into a front chamber 4' and a rear chamber 4~. A water level difference is established before and after 6a,
The water surface is not disturbed in the rear chamber 4'' where the rising section 4a is provided, and the disturbance on the water surface does not affect the rising section 4a where the discharge section 5a is located. In the chambers 4 to 4, the water surface is stabilized to prevent water droplets and splashes from entering the discharge pipe 5, and only excess gas is discharged from the discharge pipe 5. Lower rising part 4
Even if the water surface in a is disturbed, the water level in the rear chamber 4'' is sufficiently lower than that in the front chamber 4', and even if water splashes, it will not reach the height of the discharge pipe 5. Only excess gas is discharged from the discharge pipe 5 without liquid entering the discharge pipe 5.

FIG. 4 to FIG. 14 show each embodiment of the present invention.

In the case shown in FIGS. 4 and 5, a baffle plate 6b is provided as liquid intrusion prevention means 6 on the lower surface of the lid 8 provided on the top of the rising portion 48 of the accumulator 4. An inlet 5 communicating with the discharge pipe 5 through a plate 6b
The baffle plate 6b covers the inlet 5.
This prevents liquid or foreign matter such as dust or hair from entering the discharge pipe 5 from the discharge pipe 5.

In FIGS. 6 and 9, a partition plate 6C is provided as a liquid intrusion prevention means 6 in the middle of the rising portion 4a. This partition plate 6C prevents the splashing liquid from directly entering the inlet 5b of the discharge pipe 5, and is partially provided with vents 6c' through which the excess gas passes, so that only the excess gas can pass through. In the case shown in FIG. 6, a notch 9 is partially provided at the edge as shown in FIGS. 7 and 8, and this notch 9 allows the ventilation hole 6c' to be It is formed. In the case shown in FIG. 9, a through hole 10 is provided as shown in FIGS. 10 and 11.
' is formed. Here, each partition plate 6C only allows the scattered liquid to flow out. Effect of the invention] As described above, the micro bubble generator of the present invention discharges only excess gas to the discharge pipe to prevent liquid from entering. Since the device is installed in the accumulator containing the liquid, only the excess gas is discharged from the discharge pipe by the liquid intrusion prevention means, so that there is no possibility that liquid will enter the discharge pipe or dirt in the liquid will enter together with the liquid and cause clogging. This prevents the discharge pipe from becoming blocked, and the internal pressure inside the accumulator increases excessively due to the discharge pipe being blocked. This prevents water droplets from freezing and allows only excess gas to be discharged from the discharge pipe, allowing the accumulator to operate normally over a long period of time.

[Brief explanation of drawings]

Fig. 1 is a system diagram of an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same accumulator, Fig. 3 is a front view of a partition plate constituting the liquid infiltration prevention means, and Fig. 4 is the same as above. The inlet 5 of the discharge pipe 5 is designed so that it does not directly enter the inlet 5b of the accumulation discharge pipe 5 in other embodiments.
It is arranged so that it does not overlap with the lower part of b.
It is arranged to be shifted from the position of the introduction port 5b. In the case shown in FIG. 12, the rising portion 4a
A net-like sheet body 6d such as a net or a continuous porous body is attached as a liquid intrusion prevention means 6 in the middle of the tube, and this sheet body 6d prevents liquid intrusion and allows only excess gas to be discharged from the discharge pipe 5. It has become. The device shown in FIG. 14 is provided with the liquid infiltration prevention means 6 of each of the above-mentioned embodiments, that is, a partition plate 6C or a sheet body 6d is disposed on the rising portion 4a. , partition plate 6 on the body part
a is provided, and the rising part 4 is separated by the partition plate 6a.
The water level in the rear chamber 4 located below a is lowered, the partition plate 6C or the sheet body 6d prevents liquid from entering the inlet 5b, and further prevents liquid from entering the discharge pipe 5. It is possible to do so. FIG. 5 is a perspective view showing how the baffle plate constituting the liquid infiltration prevention means of the same as above is installed; FIG. 6 is a cross-sectional view of the accumulator in still another embodiment of the same; FIG. 7 8 is a partially cutaway perspective view showing the installation state of the same as above, and FIG. 9 is a cross section of the accumulator in still another embodiment of the above. 10 is a front view of the partition plate constituting the liquid infiltration prevention means as above, FIG. 11 is a partially cutaway perspective view showing the installation state of the same as above, and FIG. 12 is a further implementation of the same as above. FIG. 13 is a front view of the sheet body constituting the liquid infiltration prevention means of the same example, FIG. 14 is a cross-sectional view of the accumulator of still another embodiment of the same, and FIG. 15 is of the conventional example. System diagram, FIG. 16 is a system diagram of another conventional example,
4 is an accumulator, 5 is a discharge pipe, and 6 is a liquid intrusion prevention means. Agent Patent Attorney Ishi 1) Voluntary amendment to the 7th procedure) November 10, 1990 1, Display of the case 1990 Patent Application No. 215156 2, Name of the invention Micro bubble generator 3, Person making the amendment Case Relationship with Patent Applicant Address 1048 Kadoma, Kadoma City, Osaka Name (58
3) Matsushita Electric Works Co., Ltd. Representative: Toshio Miyoshi 4, Agent postal code: 530 Address: 1-6-16 Dojima, Kita-ku, Osaka, Japan 6, Number of claims increased by amendment: None 7, Subject of amendment l) "Fine gas generator" on page 2, line 6 of the Mei 1 IfB document will be corrected to "@fine bubble generator." 2) "Accumulator" on page 4, line 16 of the same page will be corrected to "accumulator 4". 3) Insert "Vent 6c'" after "Downward" in the second line of page 13 of the same page. 4) Figures 1, 15, and 16 of the attached drawings are ``A11''
We will make corrections as shown in Figures 1, 15, and 16 of the paper.

Claims (1)

[Claims] [1] A liquid supply pipe through which the liquid passes, a gas supply pipe that is connected to the liquid supply pipe and supplies gas into the liquid supply pipe, and a gas supply pipe that is provided in the middle of the liquid supply pipe and dissolves the gas in the liquid under pressure. In a micro bubble generator equipped with a pressurizing pump that separates undissolved gas, an accumulator that separates undissolved gas, and a discharge pipe that discharges the excess gas separated by the accumulator, only the surplus gas is discharged to the discharge pipe, and the liquid is 1. A microbubble generator characterized in that an accumulator is provided with means for preventing liquid infiltration.