CONTROL METHOD OF HEAT PUMP CYCLE, AND HEATING SYSTEM

PROBLEM TO BE SOLVED: To provide a control method of a heat pump cycle which enables power consumption of the heat pump cycle to be quickly changed without adversely affecting a durability life thereof.SOLUTION: When an indicative power consumption Eo1 which is determined by a power management device is changed, the number of revolutions of a compressor is controlled in a discharge capacity control step S3 so as to reach the target number of revolutions which is determined by the indicative power consumption Eo1, and an actual power consumption of a heat pump cycle is made to quickly approximate the indicative power consumption Eo1. Furthermore, by increasing a change amount of a throttle opening of an electric expansion valve in a change-time throttle opening control step S8, a variation of high-pressure side refrigerant pressure Pd is suppressed. By this constitution, a power consumption of the heat pump cycle can be quickly changed without causing an abnormal rise of the high-pressure side refrigerant pressure Pd.SELECTED DRAWING: Figure 4 【課題】耐久寿命に悪影響を及ぼすことなく、消費電力量を速やかに変更可能なヒートポンプサイクルの制御方法を提供する。【解決手段】電力管理装置によって決定される消費指示電力量Ｅｏ１が変化した際に、吐出能力制御ステップＳ３にて、消費指示電力量Ｅｏ１によって決定される目標回転数となるように圧縮機の回転数を制御して、ヒータポンプサイクルの実際の消費電力量を速やかに消費指示電力量Ｅｏ１へ近づける。さらに、変化時絞り開度制御ステップＳ８にて、電気式膨張弁の絞り開度の変化量を増加させることによって、高圧側冷媒圧力Ｐｄの変動を抑制する。これにより、高圧側冷媒圧力Ｐｄの異常上昇を招くことなく、ヒートポンプサイクルの消費電力量を速やかに変化させる。【選択図】図４