Quantitative cleaning agent spraying device applied to photovoltaic panel cleaning robot

The utility model discloses a cleaning agent quantitative spraying device applied to a photovoltaic panel cleaning robot, which comprises a horizontally arranged tubular spraying bottle body, a controller and a power supply unit, an end cover is arranged at one end of the spray bottle body, the other end of the spray bottle body is in butt joint with an atomizing spray head through an annular connecting part and a spray head electromagnetic valve, a piston is arranged in the spray bottle body, a metal block is arranged on the piston, a tail electromagnet is arranged on the end cover, and the piston is connected with the end cover through a reset spring; a container is arranged below the connecting part, the tail electromagnet and the spray head electromagnetic valve are both connected with a controller, the controller is used for controlling power-on and power-off of the tail electromagnet and opening and closing of the spray head electromagnetic valve, the spray bottle body is sleeved with a sleeve, and an a