Breathable sole and an air-discharging method of shoe

A breathable sole, comprising a sole body, which is provided with an air chamber, an air outlet channel, and a single-way air inlet channel;

• the air chamber is arranged at a heel position of the sole body;
• the single-way air inlet channel has a Tesla valve structure;
• one end of the single-way air inlet channel is connected with the air chamber, and another end of the single-way air inlet channel is formed with air inlet holes configured to be connected to an interior of a shoe;
• the single-way air inlet channel imposes a higher resistance against air flowing from the air chamber to the air inlet holes than air flowing from the air inlet holes to the air chamber;
• a first end of the air outlet channel is connected with the air chamber, and a second end of the air outlet channel is in communication with an air outlet hole connecting with an external environment;
• the sole body comprises a midsole and an outsole;
• a bottom surface of the midsole subsides inwards to form the air chamber, the air outlet channel, and the single-way air inlet channel;
• an upper surface of the outsole and the bottom surface of the midsole are sealed and adhered such that the air outlet channel, the air chamber, and the single-way inlet channel are sealed between the outsole and the midsole;
• the air outlet channel extends to an outer side wall of the midsole so that the second end of the air outlet channel is located on the outer side wall of the midsole;
• the outer side wall of the midsole is also recessed to form an extended channel;
• one end of the extended channel is connected to the second end of the air outlet channel;
• another end of the extended channel is located on the outer side wall of the midsole corresponding to a forefoot position of the midsole;
• a transparent strip is provided on the outer side wall of the midsole corresponding to the extended channel to cover the extended channel;
• a hole is provided on the outer side wall of the midsole in front of said another end of the extended channel;
• the hole is in communication with the extended channel and is not covered by the transparent strip;
• the hole is the air outlet hole.