Thermoelectric power generation device and gas stove

The thermoelectric power generation device comprises a heat conduction piece, a thermoelectric power generation piece and a radiator, the heat conduction piece is in contact with the hot end of the thermoelectric power generation piece, the near end of the radiator is in contact with the cold end of the thermoelectric power generation piece, and the far end of the radiator is opposite to the cold end of the thermoelectric power generation piece; the far end part is provided with a second heat dissipation structure in contact with the first heat dissipation structure, and the first heat dissipation structure and the second heat dissipation structure can move relatively in the far-far direction, so that the distance between the near end part and the far end part of the radiator is adjustable. Therefore, even if the distances between cooking ranges and bottom shells of gas stoves of different models are different, the overall size of the thermoelectric power generation device can be changed by adjusting the dist