Title:
VENTILATOR
Document Type and Number:
Japanese Patent JP2678128
Kind Code:
B2
Abstract:
PURPOSE: To improve executability of a piping work of an exhaust duct and to provide a ventilator having excellent silentness.
CONSTITUTION: A ventilator comprises a small orifice 3 fixedly at a predetermined gap to an inside of an opening end of a suction side of a small venturi 1 having a large vent passage sectional area at a suction side and a small area at a discharge side and having a large vent passage sectional area at a suction side and a small area at a discharge side, an L-shaped tubular orifice retainer 4 connected to communicate at one end with the orifice and at the other with a room 10, and a pressure chamber 5 formed at an outside of the venture 1 and the orifice 3 to surround the venture l and the orifice 3. A duct tube is eliminated at an upstream side of the ventilator, and a small-diameter duct is provided at a downstream side thereby to improve executability of a piping work.
Inventors:
Kusu Kahiro
Application Number:
JP8456593A
Publication Date:
November 17, 1997
Filing Date:
April 12, 1993
Export Citation:
Assignee:
Matsushita Seiko Co., Ltd.
International Classes:
F04F5/20; F24F7/06; F24F7/10; (IPC1-7): F24F7/06; F04F5/20; F24F7/10
Domestic Patent References:
| JP6288400A | ||||
| JP510577A | ||||
| JP2110235A | ||||
| JP6185598U | ||||
| JP4948659U | ||||
| JP5945428U |
Attorney, Agent or Firm:
Tomoyuki Takimoto (1 person outside)