EVAPORATOR INLET WATER TEMPERATURE CONTROL SYSTEM IN AN AIR-CONDITIONING SYSTEM,申请号GB19800028596-传众专利搜索

EVAPORATOR INLET WATER TEMPERATURE CONTROL SYSTEM IN AN AIR-CONDITIONING SYSTEM

申请公布号：GB2059642(A)

申请号：GB19800028596

申请日期：1980.09.04

申请公布日期：1981.04.23

申请人：

BORG-WARNER CORP

分类号：G05D23/00;F25B1/053;F25B49/02;G05D23/24;(IPC1-7):05D23/19

主分类号：G05D23/00

摘要：<p>An evaporator inlet water temperature control system for controlling the inlet water temperature of an evaporator utilized in an inverter driven centrifugal chiller. The system creates the proper chilled water set point at the evaporator outlet needed to maintain the inlet water at its set point for greater efficiency of operation. Control is accomplished by generating an electrical error signal which is a function of an inlet water set point voltage and the actual inlet water temperature. A logic signal is produced as a function of the error signal detected by the circuit and establishes a dead zone band representing a range in which the error signal is acceptable. Output of the control system is passed to the capacity control circuit of an inverter driven centrifugal compressor chiller. When the inlet water temperature reaches its set point during pull-down, the logic output of the circuit sets a flip-flop which enables transmission gates to control changes in the outlet water set point as needed to balance the load of the cooling system.</p>