Operation control method of desiccant dehumidifier according to outside air temperature

In a method of operating and controlling a desiccant dehumidifier according to the outdoor air in the summer comprises:

• supplying return air (201) of a dehumidified space to a process section (105) of a desiccant rotor (104) by means of a supply fan (102) to obtain process air (205) dehumidified by adsorption;
• supplying the return air (201) of the dehumidified space to a purge section (106) of the desiccant rotor (104) by means of the supply fan (102) to obtain purge air (206) dehumidified by adsorption;
• combining the dehumidified process air (205) and the dehumidified purge air (206) and supplying the combined air to the dehumidified space;
• heating outdoor air (207) in a regeneration heater (109) and supplying the heated outdoor air to a regeneration section (107) of the desiccant rotor (104) so as to thermally desorb moisture adsorbed to the desiccant rotor, and discharging the desorbed moisture as regeneration exhaust air (209);
• wherein three-fifths (⅗) of the total area of the desiccant rotor (104) is used as the process section (105),
• one-fifth (⅕) of the total area is used as the purge section (106), and
• one-fifth (⅕) of the total area is used as the regeneration section (107).