Apparatus for and method of producing ultrafine bubble-containing liquid, and ultrafine bubble-containing liquid

Patent metadata

Field	Value
Publication number	US-11772005-B2
Application number	US-202117178487-A
Country	US
Kind code	B2
Filing date	Feb 18, 2021
Priority date	Feb 28, 2020
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

Provided is a method of producing an ultrafine bubble-containing liquid containing ultrafine bubbles generated by causing film boiling in a liquid with a heat generation member, including: detaching a solid present at a liquid contact surface of the heat generation member in a form of a microscopic substance by using the film boiling; and generating ultrafine bubbles with the detached microscopic substance as a core.

First claim

What is claimed is:

1. A method of producing an ultrafine bubble-containing liquid containing ultrafine bubbles generated by causing film boiling in a liquid with a heat generation member, comprising:
detaching a solid present on the heat generation member in a form of a microscopic substance by using the film boiling; and
generating ultrafine bubbles with the detached microscopic substance as a core,
wherein the microscopic substance contains a component of a kogation formed on a liquid contact surface of a layer that protects the heat generation member and produced as a result of heating the liquid.

2. The method according to claim 1 , wherein the core contains a component of a liquid contact surface of a channel wall of a channel through which the liquid passes.

3. The method according to claim 1 , wherein the core contains a component contained in the liquid.

4. The method according to claim 1 , wherein the detachment of the microscopic substance is caused by using at least one of heat and pressure resulting from the film boiling.

5. The method according to claim 4 , wherein the heat or the pressure resulting from the film boiling is generated by at least one of appearance, growth, shrinkage, and disappearance of the film boiling.

6. The method according to claim 1 , wherein the detachment of the microscopic substance is caused by a chemical, electrical, or mechanical effect based on at least one of heat and pressure resulting from the film boiling.

7. The method according to claim 1 , wherein the microscopic substance has a particle size of 100 nm or less.

8. The method according to claim 1 , wherein the microscopic substance has a solubility parameter (SP) value different from that of the liquid.

9. A method of producing an ultrafine bubble-containing liquid containing ultrafine bubbles generated by causing film boiling in a liquid with a heat generation member, comprising:
detaching a solid present at a liquid contact surface of the heat generation member in a form of a microscopic substance by using the film boiling; and
generating ultrafine bubbles with the detached microscopic substance as a core,
wherein the microscopic substance is a compound containing Si.

10. The method according to claim 9 , wherein the compound containing Si is SiN, SiO, SiC, SiON, or SiOC.

11. A method of producing an ultrafine bubble-containing liquid containing ultrafine bubbles generated by causing film boiling in a liquid with a heat generation member, comprising:
detaching a solid present at a liquid contact surface of the heat generation member in a form of a microscopic substance by using the film boiling; and
generating ultrafine bubbles with the detached microscopic substance as a core,
wherein the microscopic substance is a metal having a melting point of 1770° C. or higher.

12. The method according to claim 11 , wherein the metal is a substance made of one selected from the group consisting of Hf, Ta, W, Nb, Ir, and Pt, or an alloy or oxide containing at least one selected from the group consisting of Hf, Ta, W, Nb, Ir, and Pt.

Assignees

• Canon Kk

Inventors

• Imanaka Yoshiyuki
• Kubota Masahiko
• Yamada Akitoshi
• Yamamoto Akira
• Yanai Yumi
• Ozaki Teruo
• Kashino Toshio
• Ishinaga Hiroyuki

Classifications

• B01B1/00 Primary

  Boiling; Boiling apparatus for physical or chemical purposes {; Evaporation in general} · CPC title

• F22B1/284

  with water in reservoirs · CPC title

• F22B3/02

  involving the use of working media other than water · CPC title

• B01D19/0031

  by filtration · CPC title

• B01F23/233

  using driven stirrers with completely immersed stirring elements · CPC title