*The water curtain (wet curtain) is a kind of special paper honeycomb material. Its working principle is the natural physical
phenomenon of "water evaporation absorbs heat", that is, Under the action of gravity, water flows from top to bottom, and the
water curtain ripples in the water curtain. Water film is formed on the surface of the fiber.When the flowing air passes through
the water curtain, the water in the film will evaporate to absorb the heat in the air, take away a large amount of latent heat,
and reduce the humidity of the air passing through the water curtain, thereby achieving the purpose of cooling.
