Heat pump air-conditioning system and method for controlling the same

• Main Authors: Chao Ling-Yu, Nian Shy-Her
• Format: Patent
• Language: English
• Published: 27.09.2016
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATINGSYSTEMS; ELEMENTS OR COMPONENTS THEREFOR; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; RANGES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; VENTILATING; WEAPONS

A heat pump air-conditioning system includes a four-way valve provided with a first opening, a second opening, a third opening and a fourth opening communicated with each other. The first opening, a compressor, a first heat exchanger, a first expansion device and the second opening are sequentially connected in series. The third opening, a second heat exchanger, a second expansion device, a third heat exchanger and the fourth opening are sequentially connected in series. A first bypass valve is connected in parallel with the first expansion device and is connected between the first heat exchanger and the second opening. A second bypass valve is connected in parallel with the second expansion device and the third heat exchanger and is connected between the third heat exchanger and the fourth opening. A liquid supply system is connected to the first heat exchanger.