Double-motor strong exhaust device of alternation operation



An alternatively running air exhausting device with big power and double motors includes a vent pipe; two blowers and a control switch which controls the invention to alternatively run are provided inside the vent pipe. The vent pipe is divided into a wall-penetrating pipe, a connecting pipe outside the wall or a vertical pipe; the two blowers are provided in series inside the wall-penetrating pipe or the vertical pipe, or respectively provided inside the connecting pipes outside the wall which are connected in parallel. The utility model has the advantages of that: two blowers can run alternatively; because the interval with same time length is created, so the invention can effectively avoid the damage due to the overheating; the invention also has the functions of natural ventilation and single-direction ventilation.




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