Control method for defrosting without shutdown and refrigeration device

The invention discloses a control method for defrosting without shutdown and a refrigeration device. The control method comprises the steps that a conventional refrigeration mode is executed, a refrigerant sequentially flows through at least two evaporators, and throttling is carried out through a throttling device before the refrigerant flows into the first evaporator; operation parameters of theconventional refrigeration mode are detected, and whether the operation parameters meet preset defrosting conditions or not is judged; and if yes, a defrosting refrigeration mode is executed, the refrigerant flows into the first evaporator from a bypass pipeline, and throttling is carried out through the throttling device before the refrigerant flows into the remaining evaporators. According to the control method for defrosting without shutdown and the refrigeration device, the high-temperature refrigerant which is not throttled is directly fed into the first evaporator, so that a frost layeron the surface of the ref