The invention discloses a control method of a refrigerator. A
temperature control system comprises a compressor, a first
heat exchanger, a throttling element and a second
heat exchanger, wherein the first
heat exchanger is arranged close to a first chamber; the second heat exchanger is arranged close to a second chamber; the refrigerator comprises two air channels, a first
air door and a second
air door; the first chamber communicates with a third chamber through one of the two air channels, and the second chamber communicates with the third chamber through another
air channel; the two air channels are correspondingly controlled to be opened and closed through the first
air door and the second air door. The control method comprises the steps of starting the compressor; controlling a
refrigerant to flow in forward direction and flow from the second heat exchanger to the first heat exchanger; refrigerating through the first chamber; heating through the second chamber; recording the length of time that the
refrigerant flows in the forward direction as T1; controlling the
refrigerant to flow in reverse direction and flow from the first heat exchanger to the second heat exchanger; heating through the first chamber; refrigerating through the second chamber; recording the length of time that the refrigerant flows in the reverse direction as T2; detecting the real-time temperature theta of the third chamber; and determining the difference between the real-time temperature theta and
threshold temperature T0.