Foam pump sprayer

A nozzle for a foam pump, comprising

• a cap;
• a nozzle body;
• a head;
• a hollow compression rod;
• and
• an elastic reset element;
• wherein the cap is capable of entering the nozzle body;
• an outer edge of the cap and an inner wall of the nozzle body form a dynamic seal;
• the nozzle body slides on an outer wall of the cap, forming a main body of an air pump;
• a first fastening position is provided at an upper edge of the cap and a lower edge of the nozzle body;
• a hydraulic cylinder is provided at the cap and is provided with a pump component;
• a liquid inlet check valve is installed at a bottom of the hydraulic cylinder;
• an air outlet is provided at a center of the nozzle body, and a hollow compression rod penetrates through the air outlet;
• the hollow compression rod is provided with an upper disk which is configured to open or close the air outlet;
• a connecting pipe of the head is fixedly inserted into an upper end of the hollow compression rod through a second fastening position;
• a mixing chamber is provided in the connecting pipe of the head;
• the nozzle body is further provided with an air inlet;
• a gap is formed between the head and the nozzle body through the second fastening position so as to form a floating valve;
• when the head is pressed, the gap disappears;
• a bottom of the head moves downwardly to a surface of the nozzle body to form a seal, and the air inlet of the nozzle body is closed;
• at the same time, the upper disk of the hollow compression rod opens the air outlet;
• when the head is released, the elastic reset element rebounds, and the head moves upwardly, and the gap recovers to open the air inlet, so that an air inlet check valve is formed;
• and the upper disk of the hollow compression rod closes the air outlet, so that an air outlet check valve is formed;
• and
• the pump component of the hydraulic cylinder is installed on a lower end of the hollow compression rod, forming a main body of the liquid pump.