Pressure regulator and method for regulating the same

A method of regulating a pressure regulator apparatus including a case in which an opening is provided at a first end portion of the case, an outlet is provided at a second end portion of the case, and the opening is provided to be inserted into a housing of the component, a fan provided inside the case, and a filter provided inside the case and configured to allow gas to be discharged from inside of the component to outside of the component while blocking inflow of moisture from the outside of the component to the inside of the component, the method comprising:

• predicting, by a controller electrically connected to the fan, an occurrence of dew condensation inside the component;
• when the occurrence of the dew condensation inside the component is predicted, removing, by the controller, a condition for the occurrence of the dew condensation inside the component by driving the fan during a predetermined time period to allow the gas inside the component to be discharged to the outside of the component;
• and
• outputting, by the controller, an alarm and stopping driving the fan when a cause of the occurrence of the dew condensation inside the component is not removed during a predetermined time period.