Electronic apparatus and surface temperature estimation method therefor

A surface temperature estimation method, comprising:

• acquiring, by a processor included in an electronic apparatus, a reference temperature by using a reference temperature sensor arranged on a substrate arranged in a housing of the electronic apparatus;
• acquiring, by the processor, a plurality of temperatures by using a plurality of temperature sensors arranged on the substrate for a plurality of components, respectively, arranged on the substrate;
• estimating, by the processor, an outside air temperature by using the reference temperature, the plurality of temperatures, a plurality of first transfer functions each of which is defined based on a thermal resistance and a thermal time constant from a corresponding one of the plurality of components to the reference temperature sensor, a plurality of second transfer functions each of which is defined based on a thermal resistance and a thermal time constant from a corresponding one of the plurality of components to an individual temperature sensor, and a plurality of third transfer functions each of which is defined based on a thermal resistance and a thermal time constant from a corresponding one of the plurality of components to a surface of the housing;
• and
• estimating, by the processor, a surface temperature of the housing based on the outside air temperature.

A non-transitory computer-readable storage medium storing a surface temperature estimation program that causes a processor included in an electronic apparatus to perform a procedure, the procedure comprising:

• acquiring a reference temperature by using a reference temperature sensor arranged on a substrate arranged in a housing of the electronic apparatus;
• acquiring a plurality of temperatures by using a plurality of temperature sensors arranged on the substrate for a plurality of components, respectively, arranged on the substrate;
• estimating an outside air temperature by using the reference temperature, the plurality of temperatures, a plurality of first transfer functions each of which is defined based on a thermal resistance and a thermal time constant from a corresponding one of the plurality of components to the reference temperature sensor, a plurality of second transfer functions each of which is defined based on a thermal resistance and a thermal time constant from a corresponding one of the plurality of components to an individual temperature sensor, and a plurality of third transfer functions each of which is defined based on a thermal resistance and a thermal time constant from a corresponding one of the plurality of components to a surface of the housing;
• and
• estimating a surface temperature of the housing based on the outside air temperature.