Low-pressure air cooling vacuum annealing furnace

The utility model discloses a low-pressure air cooling vacuum annealing furnace which comprises a vacuum furnace, a fan motor and an axial flow fan, and is characterized in that the fan motor for cyclic cooling, the axial flow fan and a heat exchanger are arranged in a closed air cooling chamber; the heat exchanger is arranged at an air inlet of an air cooling chamber; the axial flow fan is arranged at an air outlet of the air cooling chamber; the air outlet and the air inlet of the air cooling chamber are communicated with an air inlet and an air outlet of a vacuum thermal treatment furnace so as to form an externally closed air cooling circulating system. The low-pressure air cooling vacuum annealing furnace is characterized in that the air cooling circulating system does not occupy a space in the furnace, so that the high-power air cooling motor and the large-area heat exchanger can be mounted, and the cooling speed can be greatly increased.