Title:
CONSTANT AIRFLOW CONTROL OF A VENTILATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2010/120429
Kind Code:
A3
Abstract:
A ventilation system for providing a substantially constant airflow is disclosed. In one embodiment, a ventilation system includes: a duct; a fan (620) configured to generate an airflow through the duct; a motor (610) configured to drive the fan (620); an electric current detector (670) configured to detect an electric current provided to the motor (610) and to generate a current feedback signal; a motor speed detector (680) configured to detect a rotational speed of the motor (610) and to generate a speed feedback signal; and a controller (660) configured to determine in which speed range among a plurality of speed ranges the speed of the motor (610) is, based at least partly on the speed feedback signal. The controller (660) is further configured to change the electric current by a compensation amount pre-assigned to the determined speed range so as to reach a target value.
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Inventors:
JEUNG YOUNG CHUN (US)
JUNG JIN HO (KR)
JUNG JIN HO (KR)
Application Number:
PCT/US2010/027854
Publication Date:
January 13, 2011
Filing Date:
March 18, 2010
Export Citation:
Assignee:
SNTECH INC (US)
JEUNG YOUNG CHUN (US)
JUNG JIN HO (KR)
JEUNG YOUNG CHUN (US)
JUNG JIN HO (KR)
International Classes:
F24F11/02; F24F7/06; F24F13/02
Foreign References:
| EP0051306A1 | 1982-05-12 | |||
| US20020026801A1 | 2002-03-07 | |||
| JPH0814637A | 1996-01-19 | |||
| US20060065270A1 | 2006-03-30 |
Attorney, Agent or Firm:
DELANEY, Karoline, A. (Martens Olson & Bear, LLP,2040 Main Street, 14th Floo, Irvine CA, US)
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