Swirling-type microbubble generation device
A swirling-type microbubble generation device can discharge a swirling gas-liquid mixture containing a large volume of microbubbles into air in a concentrated manner by being placed in proximity to a jetting target, or in proximity to or in close contact with the jetting target in the air, or discharging such a mixture into water in a hot water tank, and discharging a swirling gas-liquid mixture containing a large volume of microbubbles as shower. The microbubble generation device includes a cylindrical container body that is closed at one end by a wall body and is open at the other end, a gas inlet provided in the wall body of the cylindrical container body on the one end side, and a pressurized liquid inlet provided in part of the circumferential wall of the cylindrical container body such that it is open in the direction of the tangent to the inner circumference thereof.
1 . A swirling-type microbubble generation device comprising:
a cylindrical container body that is closed at one end by a wall body and is open at another end;
a gas inlet provided in a wall body of the cylindrical container body on the one end side; and
a pressurized liquid inlet provided in part of a circumferential wall of the cylindrical container body such that the pressurized liquid inlet is open in a direction of a tangent to an inner circumference of the cylindrical container body,
wherein:
a cover body is attached to an opening on the other end side, the cover body having an outwardly protruding pipe body in a center of the cover body, and
an inside diameter (D1) of the container body is 2 to 4 times an inside diameter (D4) of the pipe body [D1=(2 to 4)×D4], and a length (L2) of the pipe body is 0.2 to 2.0 times the inside diameter D1 of the container body [L2=(0.2 to 2.0)×D1].
2 . A swirling-type microbubble generation device comprising:
a cylindrical container body that is closed at one end by a wall body and is open at another end;
a gas inlet provided in a wall body of the cylindrical container body on the one end side; and
a pressurized liquid inlet provided in part of a circumferential wall of the cylindrical container body such that the pressurized liquid inlet is open in a direction of a tangent to an inner circumference of the cylindrical container body,
wherein:
the wall body on the one end side is formed in a shape of a cone or a truncated cone protruding toward the other end side, and an inclination angle θ of a side face of the wall body having the shape of the cone or the truncated cone is set to 10° to 70° so that a tip end portion of a space within the container body on the one end side, as seen in longitudinal cross-section, has an M-shape,
a cover body having an outwardly protruding pipe body in a center of the cover body is securely or detachably attached to an opening of the container body on the other end side, so that a swirling gas-liquid mixture containing microbubbles is allowed to be guided through a tip end of the cover body, and
an inside diameter (D1) of the container body is 2 to 4 times an inside diameter (D4) of the pipe body [D1=(2 to 4)×D4], and a length (L2) of the pipe body is 0.2 to 2.0 times the inside diameter D1 of the container body [L2=(0.2 to 2.0)×D1].
3 . The swirling-type microbubble generation device according to claim 1 , further comprising a tapered portion in which the inside diameter of the container body is increased around a closed portion, wherein an end of the tapered portion is formed in an arc-shape.
4 . The swirling-type microbubble generation device according to claim 1 ,
further comprising:
a bottom of a disk-like housing is attached to a tip end portion of the outwardly protruding pipe body provided in the center of the cover body, and
a large number of pores are provided in an upper wall of the housing.
5 . The swirling-type microbubble generation device according to claim 4 , further comprising a tapered portion in which the inside diameter of the container body is increased around a closed portion, wherein an end of the tapered portion is formed in an arc-shape.
6 . The swirling-type microbubble generation device according to claim 4 , further comprising a bottom face of the disk-like housing having a torus shape.
7 . The swirling-type microbubble generation device according to claim 1 , wherein each portion has the following dimensions:
provided that the inside diameter (D1) of a cylindrical portion of the container body is 100, a length (L1) of the space within the container body is 40 to 400, a diameter (D2) of the pressurized liquid inlet provided in the wall body on the one end side is 8 to 30, the inside diameter (D4) of the pipe body provided in the center of the cover body is 10 to 50, the length (L2) of the pipe body is 6 to 200, a length (L4) between a rear end portion of the cover body and an opening of the pressurized liquid inlet is 8 to 15, and the following conditions: L1/D1=0.4 to 4.0 and D2/D4=0.4 to 1.0 are satisfied, and
the inside diameter (D1) of the container body is 8 to 300 mm, and the length (L1) of the space within the container body is 15 to 450 mm.
8 . The swirling-type microbubble generation device according to claim 4 , wherein each portion has the following dimensions:
provided that the inside diameter (D1) of a cylindrical portion of the body container is 100, a length (L1) of the space within the container body is 40 to 400, a diameter (D2) of the pressurized liquid inlet provided in the wall body on the one end side is 8 to 30, the inside diameter (D4) of the pipe body provided in the center of the cover body is 10 to 50, the length (L2) of the pipe body is 6 to 200, a length (L4) between a rear end portion of the cover body and an opening of the pressurized liquid inlet is 8 to 15, an inside diameter (D5) of the disk-like housing is 115 to 385, a thickness (L3) of the disk-like housing is 35 to 58, a diameter (D8) of the large number of pores provided in the upper wall of the housing is 1.2 to 5.8, the number of the large number of pores 5 a provided in the upper wall of the disk-like housing is 16 to 300, and the following conditions: L1/D1=0.4 to 4.0, D2/D4=0.4 to 1.0, D5/D4=1.0 to 12.5, D5/L3=1.1 to 5.0, and D7/D1=1.0 to 1.2 are satisfied, and
the inside diameter (D1) of the container body is 8 to 300 mm, and the length (L1) of the space within the container body is 15 to 450 mm.
9 . The swirling-type microbubble generation device according to claim 4 , wherein the pores provided in the upper wall of the disk-like housing are arranged along multiple concentric circles surrounding a central portion of the upper wall.
10 . The swirling-type microbubble generation device according to claim 3 , wherein the device includes a disk-like housing to be able to perform one of the following three methods:
(a) jetting shower water containing a large volume of microbubbles in air,
(b) with the device placed in proximity to a target, jetting shower water containing a larger volume of microbubbles than in method (a), and
(c) generating a large volume of microbubbles in water.
11 . The swirling-type microbubble generation device according to claim 10 , wherein a volume of microbubbles generated when each of the three methods is performed is as follows:
when the device performs the method (a) of jetting shower water containing a large volume of microbubbles in air, the volume of microbubbles generated is 0.91 to 0.96 liters/min at a water pressure of 0.3 MPa,
when the device performs the method (b) of, with the device placed in proximity to the target, jetting shower water, the volume of microbubbles generated is 1.07 to 1.12 liters/min at a water pressure of 0.3 MPa, and
when the device performs the method (c) of generating a large volume of microbubbles in water, the volume of microbubbles generated is 1.13 to 1.18 liters/min at a water pressure of 0.3 MPa.