Ptc electric heating assembly, electric heating device and electric vehicle

An electric heating device comprising:

• a casing defining a plurality of thermal conducting grooves and a medium circulating cavity hermetically isolated from the thermal conducting grooves, the medium circulating cavity defining a medium inlet and a medium outlet;
• and
• a plurality of PTC electric heating assemblies mounted into the thermal conducting grooves respectively, each PTC electric heating assembly including:
• two electrode plates;
• and
• a PTC heating module disposed between the two electrode plates, the PTC heating module including:
• an insulation fixing frame defining a plurality of fixing units, and
• a plurality of PTC heating elements disposed in the fixing units respectively.

An electric vehicle comprising:

• an air conditioning system employing an electric heating device, the electric heating device including:
• a casing defining a plurality of thermal conducting grooves and a medium circulating cavity hermetically isolated from the thermal conducting grooves, the medium circulating cavity defining a medium inlet and a medium outlet;
• and
• a plurality of PTC electric heating assemblies mounted into the thermal conducting grooves respectively, each PTC electric heating assembly including:
• two electrode plates;
• and
• a PTC heating module disposed between the two electrode plates, the PTC heating module including:
• an insulation fixing frame defining a plurality of fixing units, and
• a plurality of PTC heating elements disposed in the fixing units respectively.