Title:
REFRIGERATION CYCLE, METHOD AND CONTROLLER
Document Type and Number:
Japanese Patent JP2021032557
Kind Code:
A
Abstract:
To provide a refrigeration cycle, and a method and a controller for controlling the refrigeration cycle.SOLUTION: A refrigerant cycle includes an outdoor unit, a plurality of indoor units, and a controller for controlling the refrigeration cycle using at least one EEV. The controller comprises a velocity PID component executing a velocity PID control using a pulse number for driving an EEV, a three-state controller determining a driving state of the EEV and generating pulse commands designating the driving state, and a state machine driving the EEV depending on the pulse commands generated by the three-state controller.SELECTED DRAWING: Figure 1
Inventors:
YANG LIMING
Application Number:
JP2020075410A
Publication Date:
March 01, 2021
Filing Date:
April 21, 2020
Export Citation:
Assignee:
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
International Classes:
F25B1/00; F24F11/84
Attorney, Agent or Firm:
Patent Corporation MIP