AUTOMATIC CONTROL OF HEAT SOURCE IN CENTRAL AIR-CONDITIONING SYSTEM

摘要

PURPOSE:To improve the efficiency of the heat source and reduce energy loss due to heat dissipation by a method wherein a room temperature is detected that it has arrived at a predetermined stationary condition to reduce the objective temperature of control for heat medium fluid automatically by a predetermined temperature. CONSTITUTION:The objective temperature thetas of control for the heat medium fluid is set at the upper limit temperature in case of starting and increasing the number of sets of employing air-conditioning equipments 3, however, the temperature thetas is reset immediately at a temperature reduced by a predetermined temperature DELTAtheta in case all of the room temperatures has arrived at the set temperature. After the control, in case the detected room temperature has been at a temperature lower than the set temperature, the outlet temperature theta of the heat medium fluid is controlled automatically so that the set temperature thetas is increased by the predetermined temperature DELTAtheta based on an automatic safety control, operating a safety interception valve SV, temperature detecting results of a heat medium fluid outlet temperature detecting thermostat THo as well as room temperature detecting thermostats TH1-THn and the condition detecting results of switches SW1-SWn.