Patent ID: 8351199

Claim:
A computer case comprising: an external shell; a circuit board received in the external shell, the circuit board comprising a Peripheral Component Interconnect (PCI) socket for providing an auxiliary power supply when the computer is shut down while the computer still maintains electrical connection with an external alternating current (AC) power source; and a dehumidification device comprising: a dehumidification card received in the PCI socket for obtaining the auxiliary power supply therefrom, the dehumidification card comprising: a fan for generating airflow to remove at least moisture from the computer case; and a transmission circuit comprising a sensor for detecting a humidity inside the computer case and a wireless transceiver unit for sending a result of the detection to the remote device; and a remote device comprising: a wireless transceiver unit for receiving the detection result from the wireless transceiver unit of the transmission circuit; and a display unit for displaying the detection result; wherein when the humidity exceeds a predetermined threshold value, the computer is not powered up until the fan evacuates the excess moisture from the computer case and the humidity falls below the predetermined threshold value.