Title:
【発明の名称】冷却設備の制御方式
Document Type and Number:
Japanese Patent JP2701911
Kind Code:
B2
Abstract:
A control system for controlling cooling equipment comprising a refrigerant circuit for cooling water by heat exchange, a plurality of cooling modules in a backup relationship with an adjusting apparatus for adjusting the cooling capability of the refrigerant circuit and a controller controlling the adjusting apparatus for adjusting the cooling capability, a control module having a coolant temperature sensor and a controller for calculating a cooling capability control command based on the value detected by the coolant temperature sensor. The controller in one of the cooling modules controls the adjusting apparatus and on the cooling capability control commend transmitted from the controller in the control module. Each of the cooling modules has a coolant temperature sensor for detecting the same coolant temperature as detected by the coolant temperature sensor of the control module so that, when an abnormality occurs in the coolant temperature sensor in the control module, the controller in the control module calculates the cooling capability control command based on the value detected by the coolant temperature sensor in the cooling module. The control system is therefore capable of performing a backup operation effective for the occurrence of an abnormality in the control module.
Inventors:
Yoshio Tomio
Takashi Kato
Tetsuji Yamashita
Murakami Kyoshiro
Chief officer
Takashi Kato
Tetsuji Yamashita
Murakami Kyoshiro
Chief officer
Application Number:
JP1112989A
Publication Date:
January 21, 1998
Filing Date:
January 20, 1989
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F25D11/00; F25B49/02; F25D13/00; F25D17/02; G05D23/19; (IPC1-7): F25D13/00; F25D17/02
Attorney, Agent or Firm:
Honda Kodaira (1 person outside)