Refrigerator storage temperature control method

A refrigerator storage temperature control method, applied to a refrigerator, the refrigerator including a main refrigerator body, a compressor, a temperature sensor, a processing module and a control module, the main refrigerator body having a setting interface, a refrigeration space and a storage space connected spatially with the refrigeration space, the temperature sensor configured for detecting a temperature of the storage space, the compressor disposed in the refrigeration space and configured for introducing a refrigerant gas in the refrigeration space to the storage space, the control module configured for controlling a revolution per second (RPS) of the compressor according to the temperature detected by the temperature sensor, the refrigerator storage temperature control method comprising the steps of:

• (A) utilizing the setting interface to receive a target temperature (Ts) from a user;
• (B) utilizing the processing module to define a regulated temperature upper limit value (T1=Ts−a° C., a>0) and an allowable temperature upper limit value (T2=Ts+a° C.), according to the Ts;
• (C) utilizing the processing module to define an adjustment interval, an allowable temperature interval and a convergent cooling interval, according to the T1 and the T2, the adjustment interval being less than or equal to the T1, the allowable temperature interval being greater than the T1 and less than or equal to the T2, the convergent cooling interval being greater than the T2;
• (D) utilizing the temperature sensor to detect and update periodically a detection temperature with a detection period, the detection temperature detected in a previous detection period being defined as a previous temperature, the detection temperature detected in an instant detection period being defined as a current temperature, the temperature sensor further transmitting the previous temperature and the current temperature to the processing module;
• (E) utilizing the processing module to generate a judgment result by determining within which period the current temperature falls, and further to transmit the judgment result to the control module;
• when the judgment result tells that the current temperature falls within the adjustment interval, the control module performing RPS-m, the m being a positive integer greater than 0 and less than 20;
• then, when the detection temperature detected and updated by the temperature sensor with the detection period still falls within the adjustment interval, the control module performing RPS-n till that the detection temperature falls out of the adjustment interval, the n being a positive integer greater than 0 and less than 20;
• when the judgment result tells that the current temperature falls within the allowable temperature interval, the control module performing RPS+0;
• when the judgment result tells that the current temperature falls within the convergent cooling interval, and the previous temperature falls within the allowable temperature interval, the control module performing RPS+o, the o being a positive integer greater than 0 and less than 20;
• then, when the detection temperature detected and updated by the temperature sensor with the detection period still falls within the convergent cooling interval, the control module performing RPS+p till that the detection temperature falls out of the convergent cooling interval, the p being a positive integer greater than 0 and less than 20;
• and
• (F) when the judgment result of the Step (E) tells that the current temperature falls out of the allowable temperature interval, repeating the Steps (D) to (E), till that the judgment result of the Step (E) determines that the current temperature falls within the allowable temperature interval.