SURVEILLANCE TEMPERATURE TEST PLANTS USED A COLD DEDUCTION PLANT

摘要

PCT No. PCT/DK95/00402 Sec. 371 Date Apr. 15, 1997 Sec. 102(e) Date Apr. 15, 1997 PCT Filed Oct. 11, 1995 PCT Pub. No. WO96/12148 PCT Pub. Date Apr. 25, 1996A control arrangement for the superheat temperature of at least one evaporator of a refrigeration system having a refrigerant circulation, in which at least one compressor, a condenser, an electronically controlled expansion valve and the evaporator are arranged in series, contains a measuring device connected to the evaporator, which device produces a measurement signal T+E,uml u+EE that is a measure of the superheat temperature of the refrigerant in the evaporator, a comparator to which the measurement signal T+E,uml u+EE and a desired superheat temperature signal T+E,uml u+EE s are arranged to be supplied, and a PID controller arranged between the comparator and the expansion valve. For rapid compensation of changes in the superheat temperature, a control signal S proportional to the evaporation temperature To of the refrigerant is arranged to be supplied additionally to the PID controller.