Automatic dehumidifier for calculating dew-point temperature by adopting PLC (Programmable Logic Controller)

The utility model discloses an automatic dehumidifier for calculating dew-point temperature by adopting a PLC (Programmable Logic Controller). A dry-bulb temperature transmitter and a relative humidity transmitter are respectively arranged between an evaporator and a centrifugal fan. The dry-bulb temperature transmitter, the relative humidity transmitter, the centrifugal fan and a compressor are respectively connected with a PLC. The technical benefits are as follows: the function for operating complicated functions of the PLC is utilized to achieve the same effect, the adoption of a special dew-point temperature transmitter is avoided, and the effects of lowering the cost of the product and improving the utilization rate and the reliability of equipment are realized.