Patent ID: 7007495

Claim:
A combined ventilating and air conditioning system, comprising: an air conditioner, which comprises a compressor, a first heat exchanger for heating or cooling indoor spaces and a second heat exchanger, a refrigerant passage controller for guiding a refrigerant compressed by the compressor to the first heat exchanger or second heat exchanger according to a driving mode of the system, and an expansion device expanding a high-temperature and high-pressure refrigerant, the expansion device being provided between the first heat exchanger and the second heat exchanger; a first air duct for guiding outdoor air to the indoor spaces, the first air duct being capable of opening and closing; a second air duct for guiding indoor air to outdoors, the second air duct being capable of opening and closing and installed in such a manner that part of the second air duct intersects with the first air duct; a third air duct for guiding the indoor air to the outdoors, the third air duct being capable of opening and closing; a regenerative heat exchanger, being provided in an intersection between the first and second air ducts, for exchanging heat between the indoor air and the outdoor air passing through the intersection; and blowing fans for controlling airflows, being provided in the first air duct, in the second air duct, and in the third air duct, respectively, wherein the compressor and the second heat exchanger are provided in the third air duct.