Vaporizer and electronic vaporization device with preheating member

A vaporizer, comprising:

• a liquid storage assembly having a liquid storage cavity and a liquid inlet hole, the liquid storage cavity being configured to store an aerosol-generating substrate;
• a heating assembly arranged in the liquid storage assembly, the heating assembly being in fluid communication with the liquid storage cavity through the liquid inlet hole;
• and
• a preheating member arranged in the liquid storage cavity, the preheating member configured to preheat the aerosol-generating substrate,
• wherein the liquid storage assembly comprises a vaporization tube and a vent tube arranged in the vaporization tube,
• wherein the liquid storage cavity is formed between an inner surface of the vaporization tube and an outer surface of the vent tube,
• wherein a tube wall of the vent tube is provided with the liquid inlet hole,
• wherein the heating assembly is arranged in the vent tube,
• wherein the preheating member is arranged between the vaporization tube and the vent tube,
• wherein the preheating member is annular and arranged around the vent tube,
• wherein the preheating member is spaced apart from the vent tube,
• wherein the vent tube is thermally connected to the heating assembly, and
• wherein the preheating member is thermally connected to the vent tube.