JP-2026076275-A - Bubble generators and water supply systems, sterilization equipment, and purification equipment equipped with bubble generators.

Abstract

[Problem] To provide a bubble generator that produces a large amount of bubbles in a liquid, and a water supply system, sterilization equipment, and purification equipment equipped with a bubble generator. [Solution] The bubble generator, which mixes bubbles containing fine bubbles into a liquid, comprises a generator body 8 having an upstream section 6 in the direction of liquid flow and a downstream section 7 located downstream of the upstream section and combined with the upstream section. The generator body comprises a liquid inlet 12, an acceleration port 13 located downstream of the inlet that accelerates the liquid flowing out of the inlet and has an inner diameter smaller than that of the inlet, a mixing port 22 located downstream of the acceleration port that mixes gas into the liquid flowing out of the acceleration port and has a diameter equal to or larger than that of the acceleration port, and an outlet 23 located downstream of the mixing port through which the liquid flowing out of the mixing port flows out. The joint between the upstream section and the downstream section is formed by the fitting of a recess and a protrusion, and the gap in the fitting of the recess and protrusion at the joint section forms a gas inlet for mixing external gas into the mixing port. [Selection Diagram] Figure 3

Inventors

• 林 裕貴

Assignees

• 株式会社S.K.H.

Dates

Publication Date

20260511

Application Date

20260126

Claims (6)

1. A bubble generator that mixes bubbles containing fine bubbles into a liquid, The generator body comprises an upstream section located on the upstream side in the direction of liquid flow, and a downstream section located on the downstream side in the flow direction relative to the upstream section and combined with the upstream section. The generator body is, A liquid inlet, and an acceleration port located downstream of the inlet, which accelerates the liquid flowing out of the inlet and has an inner diameter smaller than that of the inlet, It is positioned downstream of the acceleration port and mixes gas with the liquid flowing out of the acceleration port, and has a mixing port with a diameter equal to or larger than the acceleration port, The system includes an outlet located downstream of the mixing inlet, through which the liquid that has flowed out of the mixing inlet flows out, A bubble generator in which the joint portion in the combination of the upstream portion and the downstream portion is formed by the fitting of a recess and a protrusion, and the gap in the fitting of the recess and the protrusion in the joint portion forms a gas inlet for mixing external gas into the mixing inlet.
2. The bubble generator according to claim 1, wherein the gas inlet is configured to draw external gas into the mixing inlet due to the Venturi effect, which occurs when the fluid is accelerated and depressurized at the acceleration port.
3. The bubble generator according to claim 1 or claim 2, wherein a plurality of grooves are formed radially along the bottom surface of the recess and on the upper surface of the protrusion, spaced apart in the circumferential direction.
4. A water supply device equipped with a bubble generator according to claim 1 or claim 2.
5. A sterilization apparatus equipped with a bubble generator according to claim 1 or claim 2.
6. A water purification system equipped with a bubble generator according to claim 1 or claim 2.

Description

This invention relates to a bubble generator and a water supply system, sterilization equipment, and water purification equipment equipped with a bubble generator. Patent Document 1 discloses a fine bubble generator. The fine bubble generator 1 described in Patent Document 1 consists of a cylindrical body 2 and a flange 3, with a through hole 4 provided in the center of the cylindrical body 2 and flange 3. The through-hole 4 is configured so that the liquid (fluid in Patent Document 1) swirls as it moves through the through-hole 4. Specifically, the through-hole 4 has a constricted shape, narrower in the center and wider at both ends. In other words, the through-hole 4 is formed with a narrower center and wider ends so that the centrifugal force due to the rotation of the liquid becomes greater, resulting in a significant pressure reduction in the center. Patent No. 6312768 This is a partially broken diagram showing the arrangement of the bubble generator according to the first embodiment of the present invention.This is an overall perspective view of the bubble generator from the upstream side.This is a cross-sectional view combining the upstream and downstream sections of the bubble generator.This is a cross-sectional view of the upstream section of the bubble generator.This is a cross-sectional view of the downstream side of the bubble generator, including a portion of the upstream section.This is a cross-sectional view combining the upstream and downstream sections of a bubble generator according to a second embodiment of the present invention. A bubble generator according to an embodiment of the present invention will be described with reference to Figures 1 to 6. As shown in Figure 1, the bubble generator 1 according to this embodiment will be described as being used in a shower device 3, which is a water supply device, to mix bubbles containing fine bubbles with water (liquid) 2. In this case, "bubbles" include microbubbles and ultrafine bubbles; microbubbles are bubbles of 1 μm or larger, and those smaller than that are called ultrafine bubbles. As shown in the figure, the bubble generator 1 is located at the connection point between the shower head 4 and the shower hose 5, and is housed on the shower head 4 side. As shown in Figures 1 and 2, the bubble generator 1 has a cylindrical outer casing and comprises a generator body 8 with an upstream section 6 and a downstream section 7. The generator body 8 has an upstream end face 6a, a downstream end face 7a, and through-holes (described in detail later) formed in the inner diameters of the upstream section 6 and the downstream section 7. The placement of the bubble generator 1 will be described in detail. As shown in Figure 1, the screw 10 formed on the inlet end of the shower head body 9 and the connector 5a on the outlet end of the shower hose 5 are configured to be screwed together, and the bubble generator 1 is housed inside the screw 10 of the shower head 4 so as to be detachably fitted. The inlet side of the shower head body 9 has a retaining step 11 for attaching a water-saving device (not shown), and the downstream end face 7a of the generator body 8 can abut against the inside of the screw 10 using this retaining step 11, and the upstream end face 6a of the generator body 8 is positioned flush with the inlet end 10a of the screw 10, and the upstream end face 6a can abut against the inner step 5b of the connector 5a when the screw 10 and the connector 5a are screwed together. The bubble generator 1 is housed entirely within the threaded section 10 of the showerhead 4's body 9, from the upstream end face 6a to the downstream end face 7a. The downstream end face 7a contacts the retaining step 11 of the body 9, and the upstream end face 6a contacts the inner step 5b of the connector 5a, thereby positioning the flow direction (upstream-downstream) of the water 2 in the shower device 3. Based on Figure 3, the details of the bubble generator 1's configuration will be explained. [Upstream area] First, the upstream section 6 of the generator body 8 will be described. The upstream section 6 has an upstream section body 6A, an inlet 12 and an acceleration port 13 formed within the upstream section body 6A as through-holes, and a first trap 15 for taking in air 14 into the generator body 8. The upstream outer diameter surface 16 of the upstream section body 6A is cylindrical in shape with a uniform diameter in the flow direction. The inlet 12 and the acceleration port 13 are connected through the radial center of the upstream section body 6A. The inlet 12 has an inlet 17 and a constriction 18 (buffer section). The inlet 17 opens at the upstream end face 6a of the upstream section 6. The inlet 17 is formed perpendicular to the flow of water 2 and is designed to introduce water 2 from inside the shower hose 5 (see Figure 1). The inner diameter surface 17a of the inlet 17 is cylindrical with a uniform diameter (dimension D1 in Figure 3) in the flow directio