OPERATION CONTROLLING APPARATUS FOR REFRIGERATOR

PURPOSE:To lower the running cost of a refrigerating and air-conditioning system, by varying the preset temperature of cooling water in consideration of all of inputs to an air conditioner and a refrigerator. CONSTITUTION:A pump 4 is provided at a portion of a cooling-water pipe 2 connected between an oil-burning and absorption type refrigerator 1 and an air conditioner 3, and a flow-rate detector 10 calculates the flow rate of cooling water from the electric power consumed by the pump 4. Increment in the input to a water feeding system while increment in the thermal resistance of the air conditioner 3 is calculated at a thermal resistance calculating section 15. Further, increment in the input to the refrigerator 1 is calculated by applying the outputs of a means 8 for detecting the temperature of cooling water, a load detector 9 for calculating the load of refrigerator 1 from inlet and outlet temperatures of cooling water, and a means 11 for detecting the temperature of cooling water carried through a cooling-water feed pipe 5 to a section 13 for calculating the input to the refrigerator. The increment of the input to the refrigerator 1 is afforded to a section 16 for calculating the setting temperature of cooling water together with the outputs of the section 14, 15. The setting temperature of cooling water thus obtained at the section 16 is afforded to a control section 17 and compared with the output of means 8 for controlling a fuel control valve 7 from the result of this comparison.