PTC (positive temperature coefficient) electric heater for electric automobile air-conditioning system

The utility model relates to a PTC (positive temperature coefficient) electric heater for an electric automobile air-conditioning system. A silicone rubber buckling type side frame is arranged on the periphery of each electrode slice, the internal space of each side frame is equally divided and isolated by silicone rubber strips, a PTC heating chip is positioned in each isolated region, and the side frames of the two electrode slices are buckled; a plurality of groups of PTC heating plates and radiating fins are alternately arranged in a frame body, and the PTC heating plates are electrically insulated with the radiating fins through heat-conducting silica gel protective films; a cushion plate is arranged on the inner side of the frame body, and a leaf spring for playing a damping role is arranged between the frame body and the cushion plate; a controller is positioned in a housing, and a ventilation hole is formed in the housing; one end of a terminal block is electrically connected with the electrode slices