Constant temperature wine cabinet

A constant temperature wine cabinet, comprising:

• a refrigeration unit comprising a compressor, an evaporator, a fan, and an air duct component, utilizing the evaporator for cooling and the fan to deliver cold air formed by heat exchange with the evaporator into compartments within a cabinet body for cooling;
• a heating unit for transferring heat generated by the heating unit into the compartments for heating, the heating unit comprises a first heating wire, a second heating wire, and a third heating wire;
• the compartments are divided into an upper compartment and a lower compartment by a partition, wherein the first heating wire is positioned on a side surface of the partition facing the lower compartment;
• the second heating wire is positioned at the bottom of an inner liner of the cabinet body, located at the bottom of the lower compartment;
• and the third heating wire is located on the outside of the inner liner of the cabinet body and opposite the evaporator;
• a temperature sensor unit for detecting the actual temperature inside the compartments and the external environment temperature of the constant temperature wine cabinet;
• and
• a control mainboard that selects cooling by the refrigeration unit and/or heating by the heating unit based on the external temperature within the compartments;
• wherein, when the control mainboard selects cooling by the refrigeration unit, the control mainboard obtains the external environmental temperature, derives a corresponding corrected temperature difference according to the actual environmental temperature, and corrects the switch-on and switch-off temperatures of the compressor based on the corresponding corrected temperature difference;
• the compressor operates according to the switch-on and switch-off temperatures corrected by the corresponding corrected temperature difference.