Patent ID: 11874025
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 4:
5. The air curtain apparatus according to claim 1, wherein
each of the plurality of first blowers includes:
a first cylinder part, and
a first fan provided inside the first cylinder part,

wherein the first air inlet port is provided at a first end in an axial direction of the first cylinder part,
the first air outlet port is provided at a second end opposite to the first end, in the axial direction of the first cylinder part,
the first fan sucks in air from the first air inlet port and blows out from the first air outlet port the air sucked in from the first air inlet port,
each of the plurality of first blowers further includes a first grille, the first grille being provided at the first air outlet port and having a plurality of holes formed therein, each having a helical shape swirling in a clockwise or anti-clockwise direction when viewed from the direction of the first cylinder part.