Method for detecting whether article with abnormal temperature is placed in refrigerator

A method for detecting whether an article with an abnormal temperature is placed in a refrigerator, wherein the refrigerator comprises a refrigerator body whose inner portion is divided into a plurality of storage spaces, a door body arranged at a front of the refrigerator body, a controller disposed on a main control board installed in the refrigerator body, and a plurality of infrared sensors configured to sense temperatures of the plurality of storage spaces and electrically connected to the controller respectively;

• and the method performed by the controller comprises:
• controlling the plurality of infrared sensors to collect temperature values after the door body is opened;
• determining whether an abnormal storage space in which the article with the abnormal temperature is placed exists in the plurality of storage spaces;
• acquiring a first temperature change value of the abnormal storage space before and after the article with the abnormal temperature is placed in the abnormal storage space in response to a result that the abnormal storage space exists being determined;
• calculating a second temperature change value of the abnormal storage space according to a temperature difference summation formula sum(n)=sum(n−1)+IR(n+1)−IR(n), wherein the second temperature change value is caused by heat exchange between an external environment and the abnormal storage space between time points before and after the article with the abnormal temperature is placed in the abnormal storage space, wherein at the start of the temperature difference summation calculation, sum(0)=0;
• setting IR(n+1) and IR(n) respectively being temperature values collected by the infrared sensor corresponding to the abnormal storage space at an (n+1)-th time and an n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space in response to an absolute value of a difference of the temperature values collected by an infrared sensor corresponding to the abnormal storage space at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space being smaller than a first preset value;
• setting IR(n+1) and IR(n) respectively being temperature values collected by an additional infrared sensor at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space in response to the absolute value of the difference of the temperature values collected by the infrared sensor corresponding to the abnormal storage space at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space being greater than or equal to the first preset value, and the additional infrared sensor by which an absolute value of a difference of temperature values collected at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space is smaller than the first preset value being identified;
• setting IR(n+1) and IR(n) respectively being temperature values collected by any one of two or more additional infrared sensors at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space, or respectively being average values of temperature values collected by all of the two or more additional infrared sensors at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space in response to the absolute value of the difference of the temperature values collected by the infrared sensor corresponding to the abnormal storage space at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space being greater than or equal to the first preset value, and the two or more additional infrared sensors by each of which an absolute value of a difference of temperature values collected at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space is smaller than the first preset value being identified;
• setting sum(n)=sum(n−1) in response to an absolute value of a difference of temperature values collected by each of the plurality of infrared sensors at the (n+1)-th time and the n-th time between time points before and after the article with the abnormal temperature is placed in the abnormal storage space being greater than or equal to the first preset value;
• and
• determining whether the article with the abnormal temperature is placed in the abnormal storage space according to the first temperature change value and the second temperature change value.