| 摘要 |
PURPOSE:To make it possible to reach a specified setting pressure promptly and improve dynamic characteristics with the reduction in power consumption and fluctuations in load by installing a fuzzy control section which carries out fuzzy inference based on a signal transmitted from a pressure comparison section and a differential coefficient arithmetic operation section and outputs a deterministic value, and controlling the capacity of a refrigeration section in conformity with the deterministic value. CONSTITUTION:A pressure detection section 4 detects the pressure of refrigerant on a lower pressure side of a refrigeration cycle of a refrigeration 4 and generates a pressure detection signal. A pressure comparison section 5 compares a pressure detection signal transmitted from the pressure detection section 4 with a reference value which is set in response to a specified setting pressure, generates a signal responding to the difference while a differential coefficient arithmetic operation section 6 receives a pressure detection signal transmitted from the pressure detection section 4, computes a differential coefficient of the pressure of refrigerant, and generates a signal in conformity with the result of the arithmetic operation. A fuzzy control section 7 carries out fuzzy inference based on each signal transmitted from the pressure comparison section and the differential arithmetic operation and outputs a deterministic value while a capacity control section 8 controls the capacity of a parallel compression type refrigeration device in response to the deterministic value from the fuzzy control section. |
