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

Claim 14:
15. An air curtain apparatus that forms an air curtain, comprising:
a plurality of first blowers that is arrayed in an up-down direction, and each include a first air inlet port in which air is sucked in and a first air outlet port from which the air is blown out; and
a plurality of second blowers that is arrayed in the up-down direction, each includes a second air inlet port in which air is sucked in and a second air outlet port from which the air is blown out, and, in a plan view, the second air inlet port each faces the first air outlet port included in each of the plurality of first blowers,
wherein
in a pair of the first blower and the second blower,

the first blower blows out a helical air current from the first air outlet port included in the first blower toward the second air inlet port included in the second blower,
the second blower sucks in the helical air current blown out by the first blower from the second air inlet port included in the second blower, and
the air curtain apparatus forms the air curtain of a plurality of the helical air currents, the plurality of helical air currents being blown out from the plurality of first air outlet ports each included in each of the plurality of first blowers and sucked into the plurality of second air inlet ports each included in each of the plurality of second blowers, and, wherein
at least any one of the first blower and the second blower further comprises an identification member that makes it possible to visually identify the traveling direction of the helical air current,
the identification member comprises an elongated bag-shaped member, a base end of the elongated bag-shaped member being opened and a termination of the elongated bag-shaped member being closed; and a linear spring member fixed to the bag-shaped member and deforming the bag-shaped member into a wrapped state, and
the bag-like member is arranged so that the base end faces the first blower and extends along the traveling direction of the helical air current, by air from the first blower flowing in from the base end.