Image forming apparatus

An image forming apparatus comprising:

• a main body having a fusing unit;
• a first temperature sensor which is disposed in an external surface of the main body and measures an outside temperature;
• a second temperature sensor which is disposed inside the main body and measures an inside temperature;
• a humidity sensor which is disposed inside the main body and measures an inside humidity;
• at least one fan disposed in the main body;
• and
• a controller configured to calculate a dew point temperature by using the inside temperature and the inside humidity and operate the at least one fan based on the calculated dew point temperature,
• wherein the controller compares a temperature difference between the outside temperature and the inside temperature to a preset temperature margin, and, if the temperature difference is equal to or less than the preset temperature margin, the controller calculates the dew point temperature.

An image forming apparatus comprising:

• a main body;
• a first temperature sensor to measure an outside temperature corresponding to an air temperature outside of the main body;
• a humidity sensor to measure a humidity;
• a second temperature sensor to measure an inside temperature corresponding to an air temperature inside of the main body;
• a cooling unit disposed in the main body;
• and
• a controller configured to calculate a dew point temperature by using the inside temperature and the humidity, and to operate the cooling unit based on a difference between the outside temperature and the calculated dew point temperature.

An image forming apparatus comprising:

• a main body having a fusing unit;
• a first temperature sensor which is disposed in an external surface of the main body and measures an outside temperature;
• a humidity sensor which is disposed in the external surface of the main body and measures an outside humidity;
• a second temperature sensor which is disposed inside the main body and measures an inside temperature;
• a fan disposed in the main body;
• and
• a controller configured to compare a temperature difference between the measured outside temperature and the measured inside temperature to a first preset temperature margin, and, if the temperature difference is less than or equal to the preset temperature margin, to calculate a dew point temperature using the measured inside temperature and the measured outside humidity,
• wherein the controller is further configured to operate the fan when a difference between the calculated dew point temperature and the measured outside temperature is less than or equal to a second preset temperature margin.