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

Claim 9:
10. 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 the air curtain apparatus comprises
N air curtain forming units (N being an integer of 3 or larger), the air curtain forming units being arrayed along an annular path around a central axis along the up-down direction and each forming an air curtain, wherein each of the N air curtain forming units includes:
a plurality of first blowers, and
a plurality of second blowers,

wherein for each of the N air curtain forming units, in a pair of a third air curtain forming unit and a fourth air curtain forming unit, in a plan view, the third air curtain forming unit being the air curtain forming unit, and the fourth air curtain forming unit, of the N air curtain forming units, being arranged on a first side which is, in a plan view, side of an anti-clockwise direction or side of a clockwise direction, along the annular path of the third air curtain forming unit, and the fourth air curtain forming unit being the air curtain forming unit adjacent to the third air curtain forming unit,
the plurality of second blowers held by the third air curtain forming unit is adjacent to a plurality of first blowers held by the fourth air curtain forming unit,
the third air curtain forming unit has a second connection unit that connects in an air-tight manner the plurality of second air outlet ports and the plurality of first air inlet ports in an airtight manner, the plurality of second air outlet ports each being included in each of the plurality of second blowers held by the third air curtain forming unit and the plurality of first air inlet ports each being included in each of the plurality of first blowers held by the fourth air curtain forming unit.