Aerosol-generating device and aerosol-generating system including the same

An aerosol-generating device comprising:

• a housing having an opening configured to receive an aerosol-generating article;
• an accommodating space configured to accommodate the aerosol-generating article inserted through the opening;
• a heat-dissipating structure comprising an inner wall and an outer wall that surrounds the inner wall such that an inner space is formed between the inner wall and the outer wall;
• a coil arranged in the heat-dissipating structure and configured to generate an induced magnetic field;
• and
• a susceptor configured to generate heat based on the induced magnetic field, and arranged to surround the accommodating space such that the coil is disposed between the susceptor and the inner wall,
• wherein the heat-dissipating structure has an upper wall and a lower wall which connect the outer wall and the inner wall,
• wherein the inner space of the heat-dissipating structure is a vacuum space such that heat is prevented from being transferred from the inner wall to the outer wall, and
• wherein the lower wall forms a closed bottom of the heat-dissipating structure, the lower wall of the heat-dissipating structure has a multi-wall structure, and a vacuum space is formed in the lower wall such that heat is prevented from being transferred through the lower wall.