TEMPERATURE DISPLAY

PURPOSE:To display an appropriate temperature in a box by judging whether the temperature sensed by a temperature sensing device is within a set temperature range, when within the range, outputting to display a set temperature determined in advance within the set temperature range and, when out of the range, outputting to display the sensed temperature as it is. CONSTITUTION:A temperature in a box is set to a desired value, a temperature range including the set temperature value is determined and whether a temperature detected by a temperature sensing device 1 is within the determined temperature range is judged. Since, when the detected temperature is within the determined temperature range, the actual temperature of goods in the box can be judged to be near the set temperature, the set temperature is displayed on a display unit 4. When the detected temperature exceeds the determined temperature range, the temperature in the box is estimated to be abnormal, so that the detected temperature is displayed as it is. The temperature range is set in expectation of a temperature rise in the box due to a door opening for charging the goods, a set temperature as compared with an expected temperature is displayed and a temperature identical to the temperature of the goods for sale is displayed without the detected temperature being displayed as it is. Thus, the appropriate display of the temperature in the box can be executed.