Title:
冷却システムのための自己調整引下げファジー論理温度制御
Document Type and Number:
Japanese Patent JP4022202
Kind Code:
B2
Abstract:
A pull-down control algorithm for an HVAC refrigeration system is provided. The control algorithm utilizes a fuzzy logic methodology to automatically adjust a flow of refrigerant in the system during a pull-down to maintain a desired pull-down rate. The desired pull-down rate is decreased proportionately as the temperature of the fluid being pulled down approaches a desired operating setpoint to avoid or minimize any overshoot of the operating setpoint. The desired pull-down rate is obtained by adjusting a rate sensitivity factor used in the control algorithm. When the temperature of the fluid being pulled down is above a predetermined value from the operating setpoint, the control algorithm uses a fuzzy logic methodology to determine a rate sensitivity that results in the desired pull-down rate that approaches the operating setpoint without overshoot.
Inventors:
Beaverson, Gregory Kay
Miller, Wanda Jay
Miller, Wanda Jay
Application Number:
JP2003558607A
Publication Date:
December 12, 2007
Filing Date:
December 19, 2002
Export Citation:
Assignee:
YORK INTERNATIONAL CORPORATION
International Classes:
F24F11/02; G05B5/01; G05B13/02; G05D23/19
Domestic Patent References:
| JP2000513430A | ||||
| JP4165267A | ||||
| JP7301448A | ||||
| JP9310926A | ||||
| JP5223362A |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Fumitoshi Nishiyama
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Fumitoshi Nishiyama