Spring reset vacuum breaker

The utility model relates to a spring reset vacuum breaker, which comprises a valve body, a valve clack and a valve cover, the valve body is provided with an air inlet, the valve clack moves towards the air inlet and leaves or presses the air inlet, a reset spring is arranged between the valve clack and the valve cover, and the valve clack presses the air inlet under the action of the reset spring. The vacuum breaker has the advantages that the reset spring is adopted to drive the valve clack to be closed, the reset spring has proper elastic force, the valve clack can be sensitively opened when a system is in a vacuum state, the valve clack can be safely and reliably closed after the vacuum state is eliminated, safe and effective work of the vacuum breaker is guaranteed, the installation condition of the vacuum breaker is improved, and the service life of the vacuum breaker is prolonged. And the vacuum breaker is not limited to a vertical installation state. 本实用新型涉及一种弹簧复位真空破坏器，包括阀体、阀瓣和阀盖，所述阀体设有进气口，所述阀瓣朝向所述进气口