Heater control device

A heater control device, comprising:

• a camera sensor configured to capture an image of an outside of a vehicle from an inside of the vehicle through an image capturing transparent region being a partial region of a window glass of the vehicle;
• a camera heater configured to generate heat by being energized, and to heat the image capturing transparent region with the generated heat;
• and
• a control unit configured to control the energization to the camera heater,
• wherein the control unit is configured to:
• estimate a dew-point temperature based on an inside temperature being a temperature inside the vehicle and an inside humidity being a humidity inside the vehicle;
• apply, to a correlation which is set in advance between an outside temperature being a temperature outside the vehicle, a vehicle speed being a speed of the vehicle, and energization electric power for energizing the camera heater, and a temperature of the image capturing transparent region corresponding to the outside temperature, the vehicle speed, and the energization electric power, the outside temperature at a current time, the vehicle speed at the current time, and a target temperature equal to or higher than the dew-point temperature, to thereby determine defogging electric power for maintaining the temperature of the image capturing transparent region at the target temperature so that the temperature of the image capturing transparent region is prevented from falling below the dew-point temperature;
• and
• energize the camera heater at the defogging electric power.