A temperature control apparatus used in a liquid carbon dioxide storage tank

Provided is a temperature control apparatus used in a liquid carbon dioxide storage tank. The temperature control apparatus comprises a temperature sensing device and a heat source control device which are connected together. The temperature sensing device comprises a housing internally equipped with a left metallic plate and a right metallic plate. A gap is preset between the left metallic plate and the right metallic plate. The left metallic plate and the right metallic plate are connected with the heat source control device. The housing is connected with a metallic tube inserted into the liquid carbon dioxide storage tank, wherein the bottom of the metallic tube is sealed. A piston is disposed in the metallic tube and is moved when temperature in the liquid carbon dioxide storage tank changes. The piston is connected with a metallic sheet through a connecting rod, wherein the left metallic plate and the right metallic plate are connected through the metallic sheet. The temperature control apparatus is capa