AIR CONDITIONER

• Main Author: OKA YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 31.08.2017
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To provide an air conditioner that can exhibit sufficient heating capacity in each indoor unit during a heating operation even when an outdoor unit is installed at a position higher than that of each of the plurality of indoor units.SOLUTION: A CPU 210 extracts a maximum value and a minimum value among calculated refrigerant supercooling degrees SCa-SCc, and calculates an average refrigerant supercooling degree SCv of the supercooling degrees. Then, the CPU 210 transmits the calculated average refrigerant supercooling degree SCv and a high pressure saturation temperature Ths to indoor units 5a-5c. CPUs 510a-510c that have received the average refrigerant supercooling degree SCv and the high pressure saturation temperature Ths calculate the refrigerant supercooling degrees SCa-SCc by subtracting heat exchange outlet temperatures Toa-Toc from the high pressure saturation temperature Ths, respectively, and control openings of indoor expansion valves 52a-52c so that each of the calculated refrigerant supercooling degrees SCa-SCc becomes the average refrigerant supercooling degree SCv. The CPU 210 adds three pulses to an outdoor expansion valve 24 so as to increase an opening of the outdoor expansion valve 24.SELECTED DRAWING: Figure 4 【課題】室外機が複数台の室内機より高い位置に設置されている場合でも、暖房運転時に各室内機で十分に暖房能力を発揮できる空気調和装置を提供する。【解決手段】ＣＰＵ２１０は、求めた冷媒過冷却度ＳＣａ〜ＳＣｃの中で最大値と最小値を抽出し、これらの平均冷媒過冷却度ＳＣｖを求める。次に、ＣＰＵ２１０は、求めた平均冷媒過冷却度ＳＣｖと高圧飽和温度Ｔｈｓを室内機５ａ〜５ｃに送信する。平均冷媒過冷却度ＳＣｖと高圧飽和温度Ｔｈｓを受信したＣＰＵ５１０ａ〜５１０ｃは、高圧飽和温度Ｔｈｓから熱交出口温度Ｔｏａ〜Ｔｏｃを減じて冷媒過冷却度ＳＣａ〜ＳＣｃを求め、求めた冷媒過冷却度ＳＣａ〜ＳＣｃが平均冷媒過冷却度ＳＣｖとなるように、室内膨張弁５２ａ〜５２ｃの開度を調整する。そして、ＣＰＵ２１０は、室外膨張弁２４に３パルス加えて室外膨張弁２４の開度を大きくする。【選択図】図４