Integrated central air conditioner with medium-pressure active freezing protection and oil balance device

• Main Author: WANG DEYUAN
• Format: Patent
• Language: Chinese; English
• Published: 05.12.2012
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; 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

The invention discloses an integrated central air conditioner with a medium-pressure active freezing protection and oil balance device. The integrated central air conditioner comprises a compressor, a sanitary hot water heat exchanger, an outdoor fin heat exchanger, a condensing fan arranged beside the outdoor fin heat exchanger, a bi-directional drying filter, a bi-directional electronic expansion valve, a liquid storage device, an indoor air-conditioner heat exchanger, an air liquid separator, a circulating pump, two pressure leveling capillary pipes, a four-way reversing valve and a one-way valve, which are communicated one another through pipelines. By leveling pressure by the two pressure leveling capillary pipes and with the one-way valve, the four-way reversing valve and the like, the air conditioner functions in active freezing protection from passive freezing protection when running in single cooling mode and single heating mode since the temperature of coolant in the sanitary hot water heat exchange