The operation control method and engine driven heat pump type air conditioner with hot water heating unit

摘要

PPROBLEM TO BE SOLVED: To stably supply engine exhaust heat to a hot-water supply heating unit when an HP operation where the hot-water supply heating unit simultaneously takes in the refrigerant heat and engine exhaust heat is independently performed. PSOLUTION: This air conditioner 1 of engine driving heat pump type has an outdoor heat exchanger 34, an indoor heat exchanger 4, and a refrigerant heat exchanger 61 in a refrigerant circuit 28 in which a refrigerant is circulated by a compressor 7 driven by a gas engine 6. The air conditioner 1 has an exhaust gas heat exchanger 24 and a hot water heat exchanger 62 in a cooling water circuit 29 for circulating cooling water for cooling the gas engine. The air conditioner 1 also has the hot-water supply heating unit for heating water in a hot water pipe including a hot water storing tank 63 in the hot-water supply heating unit 60 with the refrigerant heat exchanger and the hot water heat exchanger. The air conditioner 1 also has a control means for inhibiting increase of rotation speed of the gas engine if refrigerant pressure on the suction side of the compressor becomes a predetermined pressure or lower, when the HP operation where the hot-water supply unit simultaneously takes in the refrigerant heat from the refrigerant heat exchanger and engine exhaust heat from the hot water heat exchanger is independently performed. PCOPYRIGHT: (C)2004,JPO