The utility model provides a
breather valve, which is mounted in a
breathing tube pipeline of a water dispenser and comprises a valve body, a
piston and a valve core, the
piston is arranged in an inner cavity of the valve body, and the valve element is arranged in a through center hole of the
piston in a penetrating mode. The bottom end of the valve element extends out of the position below the piston, a cylinder at the bottom end of the valve element is blocked by the piston, and limiting of the valve element is achieved. The
breathing valve is simple and reasonable in structure, high in integrity and suitable for
breathing control of the water tank of the water dispenser, and when water is supplemented to the water tank, air pressure in the water tank rises to push the piston in the breathing valve to exhaust air in the water tank; when the water dispenser takes water, the water tank pumps water to form negative pressure, a valve element in the
breather valve is sucked, and steam generated by heating is mixed with outside air to enter the water tank; when the water dispenser is not used, the
breather valve is in a
closed state, so that the water tank of the water dispenser can be effectively prevented from being polluted by
pollution sources in
ambient air; the breather valve is simple in production and
assembly process, convenient to operate and convenient to popularize and apply in production and life.