US 11,938,503 B2
Ultrafine bubble-containing liquid manufacturing apparatus and manufacturing method
Kenji Takahashi, Yokohama (JP); Masahiko Kubota, Tokyo (JP); Ikuo Nakazawa, Kawasaki (JP); Akitoshi Yamada, Yokohama (JP); and Nobuhisa Tanahashi, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Appl. No. 16/642,426
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Aug. 22, 2018, PCT No. PCT/JP2018/031029
§ 371(c)(1), (2) Date Feb. 27, 2020,
PCT Pub. No. WO2019/044631, PCT Pub. Date Mar. 7, 2019.
Claims priority of application No. 2017-167598 (JP), filed on Aug. 31, 2017.
Prior Publication US 2020/0197963 A1, Jun. 25, 2020
Int. Cl. B05B 7/16 (2006.01); B05B 7/08 (2006.01); B05B 15/40 (2018.01); B05B 15/531 (2018.01); B05B 15/68 (2018.01)
CPC B05B 7/1686 (2013.01) [B05B 7/0876 (2013.01); B05B 15/40 (2018.02); B05B 15/531 (2018.02); B05B 15/68 (2018.02)] 22 Claims
OG exemplary drawing
 
1. An ultrafine bubble-containing liquid manufacturing apparatus comprising:
an ultrafine bubble generating unit configured to generate ultrafine bubbles with a diameter of less than 1.0 μm by bringing a liquid into film boiling, including:
a heater;
a flow path for leading the liquid to the heater;
a controller configured to drive the heater and cause film boiling in the liquid led to the heater; and
an ejection opening for ejecting liquid containing ultrafine bubbles generated by the film boiling; and
a container configured to collect the liquid in a sealed space cut off from outside air immediately after being ejected from the ejection opening,
wherein the apparatus is configured such at least 99.8% of bubbles in the liquid collected in the container are the ultrafine bubbles.
 
18. An ultrafine bubble-containing liquid manufacturing apparatus comprising:
an ultrafine bubble generating unit configured to generate ultrafine bubbles with a diameter of less than 1.0 μm, including:
a heater;
a flow path for leading the liquid to the heater;
a controller configured to drive the heater to heat a surface of the heater to a temperature of 300° C. or higher and produce bubbles on the surface of the heater; and
an ejection opening for ejecting liquid containing the ultrafine bubbles generated by production of the bubbles by heating the heater; and
a container configured to collect the liquid in a sealed space cut off from outside air immediately after being ejected from the ejection opening,
wherein the apparatus is configured such at least 99.8% of the bubbles in the liquid collected in the container are the ultrafine bubbles.
 
21. An ultrafine bubble-containing liquid manufacturing apparatus comprising:
an ultrafine bubble generating unit configured to generate ultrafine bubbles with a diameter of less than 1.0 μm by bringing a liquid into film boiling, including:
a heater;
a flow path for leading the liquid to the heater;
a controller configured to drive the heater and cause film boiling in the liquid led to the heater; and
an ejection opening for ejecting liquid containing ultrafine bubbles generated by the film boiling; and
a container configured to collect the liquid ejected from the ejection opening,
wherein the apparatus is configured such that the liquid collected in the container contains at least 3.0 billion of the ultrafine bubbles per milliliter, both at a time of manufacture and after being stored in the container for three months from the time of manufacture at a temperature of 25° C. and
wherein the apparatus is configured such at least 99.8% of bubbles in the liquid collected in the container are the ultrafine bubbles.
 
22. An ultrafine bubble-containing liquid manufacturing apparatus comprising:
an ultrafine bubble generating unit configured to generate ultrafine bubbles with a diameter of less than 1.0 μm by bringing a liquid into film boiling, including:
a heater;
a flow path for leading the liquid to the heater;
a controller configured to drive the heater and cause film boiling in the liquid led to the heater; and
an ejection opening for ejecting liquid containing ultrafine bubbles generated by the film boiling; and
a container configured to collect the liquid ejected from the ejection opening,
wherein the apparatus is configured such that at least 99.8% of bubbles in the liquid collected in the container are the ultrafine bubbles, both at a time of manufacture and after being stored in the container for three months from the time of manufacture at a temperature of 25° C.