In order to achieve the purpose of cooling, people hold fans in their hands and fan the surrounding air; Or lengthen and widen clothes, use walking to generate airflow, or simply live in an air-conditioned room, but once you go out, you will sweat.
Therefore, people began to use the principles of bionics to learn the temperature regulation skills of animals. In summer, seals use both front fins and tail fins to fan the wind; Elephants often pat their ears ... take elephants for example. The blood in the microvessels in an elephant's ear will be cooled by the flow of air. When the liquid circulates, it will bring the cooled blood to the whole body, thus cooling the muscles around the blood vessels. People think of using solar energy to cool down, installing miniature electric fans on wide cuffs or making buttons inward. Shoulder and collar are detachable miniature solar panels, and people rely on solar panels to absorb light energy and convert it into electric energy. Electric energy drives the micro fan to rotate through micro wires, cooling the skin of the fan, just like the ears of an elephant. In a cool place, the fan will automatically stop running.
For people who have difficulty sweating due to illness, or patients with congenital anhidrosis, more hopes are pinned on the renewal of clothes and the improvement of functions. A dog is an animal that can't sweat. In hot weather, dogs breathe with their wet tongues to make the air flow and take away heat. The capillaries on the tongue are cold, and the flowing blood is cold. Scientists are further studying the methods of cooling animals, and designing new temperature-regulating clothes by using the principles of bionics.
The fabric of this kind of clothes is sensitive to light and heat. When the sunshine is sufficient and the temperature is high, the textile fibers of the clothes will automatically extend, which will widen the warp and weft density of the cloth, and the air will flow in these open micro-windows, making the body feel cool. Sometimes when people sweat a lot, sweat-absorbing fibers on the inner surface of clothes will protrude out of micropores to absorb sweat, and the absorbed sweat will flow vertically under the clothes under the action of gravity. When sweat accumulates, the micro-drainage holes will automatically expand, sweat will flow downstream, and the micropores will automatically close after sweat is discharged.
Some sun-protective clothing fabrics are also mixed with reflective fibers. When the sunlight is direct, the reflective fiber will effectively refract the sunlight, so that people will not feel hot.