Control method of single-system refrigerator

The invention provides a control method of a single-system refrigerator. The single-system refrigerator comprises a refrigerating system, a refrigerating chamber, a freezing chamber, a fan and a refrigerating air door. The control method comprises the steps that the ambient temperature around the single-system refrigerator is obtained; and in response to the situation that the environment temperature is not higher than the preset refrigeration starting temperature of the refrigeration chamber and the defrosting program is finished, the draught fan and the refrigeration air door are started, and airflow internal circulation is conducted between an evaporator of the refrigeration system and the refrigeration chamber. According to the control method of the single-system refrigerator, hot air is provided for the refrigerating chamber, heat is provided for the refrigerating chamber, the inherent temperature layer of the refrigerating chamber is broken, and local condensation and frosting of the refrigerating chamb