Electrostatic atomizer

Patent metadata

Field	Value
Publication number	US-9821330-B2
Application number	US-201314649766-A
Country	US
Kind code	B2
Filing date	Dec 5, 2013
Priority date	Dec 7, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A chamber ( 1 ) and an air conduit ( 7 ) connecting a liquid surface retaining hole ( 5 ) with an air hole ( 6 ) for supplying air from the outside of an electrostatic atomizer ( 50 ) to the chamber ( 1 ) are provided. When the liquid surface retaining hole ( 5 ) is blocked, the liquid supply from a liquid supplying section ( 3 ) to the chamber ( 1 ) will be stopped. The air conduit ( 7 ) has bent sections ( 8 ), and a space ( 10 ) for holding the liquid is formed in the air conduit ( 7 ).

First claim

The invention claimed is:

1. An electrostatic atomizer for spraying a liquid, said electrostatic atomizer comprising:
a chamber for storing the liquid supplied from a liquid supplying section; and
an air conduit connecting a liquid surface retaining hole with an air hole, the air conduit being provided in the chamber, the liquid surface retaining hole being blocked or opened by the liquid depending on a level of a liquid surface of the liquid, and the air hole being provided so that air may be supplied from the outside of said electrostatic atomizer to the chamber via the air hole,
wherein said atomizer is so designed that liquid supply from the liquid supplying section to the chamber will be stopped when the liquid surface retaining hole is blocked by the liquid,
the air conduit has bent sections, and
a space for holding the liquid is formed in the air conduit, and
wherein:
the air conduit has inclinations so as to be convexed away from the liquid surface;
the air conduit has a first portion that extends in a first direction which is perpendicular to or inclined with respect to the liquid surface and a second portion that extends in a second direction whose angle with respect to the liquid surface is smaller than that of the first direction;
a first bent section is provided between the first portion and the second portion as one of the bent sections; and
the second portion is inclined with respect to the liquid surface so that a first bent section side thereof may be located closer to the liquid surface.

2. The electrostatic atomizer as set forth in claim 1 , wherein:
the air conduit has a third portion which is continuous with the second portion, the third portion being closer to the air hole than the second portion is;
the third portion is inclined with respect to the liquid surface so that an opposite side of the first bent section thereof is located closer to the liquid surface than the side of the first bent section thereof.

3. The electrostatic atomizer as set forth in claim 2 , wherein:
a first space is provided on a side of the second portion as one of spaces for holding the liquid, the side of the second portion being closer to the first bent section; and
a second space is provided on a side of the third portion as another one of the spaces for holding the liquid, the side of the third portion being an opposite side of the first bent section.

Assignees

• Sumitomo Chemical Co

Inventors

• Sasaki Takashi
• Dau Van Thanh

Classifications

• B05B5/16

  Arrangements for supplying liquids or other fluent material · CPC title

• A61M11/00 Primary

  Sprayers or atomisers specially adapted for therapeutic purposes (in general B05B; {aerosol containers B65D83/14}) · CPC title

• A61M2205/21

  insensitive to tilting or inclination, e.g. spill-over prevention · CPC title

• B05B5/057

  Arrangements for discharging liquids or other fluent material without using a gun or nozzle · CPC title

• B05B5/0255

  spraying and depositing by electrostatic forces only · CPC title