Air curtain machine with adjustable tuyeres

The air curtain machine comprises a fan mechanism, the fan mechanism comprises a machine body and a wind wheel transversely installed in the machine body, and the two ends of the wind wheel are both sleeved with telescopic sleeves; the tuyere mechanism is mounted at the air outlet of the machine body, and the tuyere mechanism comprises a fixed tuyere and adjusting tuyeres connected with the two ends of the fixed tuyere in a sliding and sleeving manner; the linkage mechanism comprises a double-threaded rod and a driving mechanism installed on the double-threaded rod, the two ends of the double-threaded rod are fixedly connected with the telescopic sleeves through threaded sleeves, and the telescopic sleeves located at the two ends are connected with the two adjusting tuyeres through connecting plates correspondingly; when the length of the air curtain is adjusted, the widths of the adjusting air nozzles on the two sides are adjusted, and the corresponding telescopic sleeves can move synchronously, so that the