| 摘要 |
The rotary heat exchanger comprises a clean fluid duct (1) and a polluted fluid duct (2) separated by a separating wall (3), suction means (4) being arranged to draw fluid through said ducts. A rotor (7) separates each said ducts into an upstream and a downstream clean fluid chamber (8,9) and a downstream and an upstream polluted fluid chamber (10,11), respectively, said rotor having transverse channels (12) connecting said upstream and downstream clean fluid chambers and said upstream and downstream polluted fluid chamber, respectively. A flow path (17) connects one clean fluid chamber and one polluted fluid chamber at any given rotary position of said rotor through a number of said channels such as to blow out or purge said channels before rotating to enter said clean fluid duct. Measuring means are arranged to continuously measure a pressure difference between said one clean fluid chamber and said one polluted fluid chamber. Control means are arranged to continuously control a pressure loss device (18) on the basis of said pressure difference such as to ensure that a fluid pressure in said one clean fluid chamber is greater than a fluid pressure in said one polluted fluid chamber. |
