Melt direct spinning porous fine denier filament polyester fiber spinning equipment and spinning process thereof

The invention discloses melt direct spinning porous fine denier filament polyester fiber spinning equipment and a spinning process thereof.The melt direct spinning porous fine denier filament polyester fiber spinning equipment comprises a spinning manifold connected with a vapor-phase heating medium outlet of a heat exchanger, the heating medium station and the heat exchanger form an external circulation heat exchange system through a vapor-phase heating medium conveying pipeline and a liquid-phase heating medium conveying pipeline; a temperature sensor is further mounted on the spinning box body; the spinneret plate is arranged in the spinning box body; and the annular blowing cylinder is arranged below the spinning box body. The product prepared by the method is more stable in physical index elongation and thermal stress, smaller in deviation from a central value M, better in product quality, less in broken ends and higher in superior rate, and the product is more stable, less in broken ends and more unifor