Box dc -to -ac converter and low -temperature protection device thereof

The utility model provides a low -temperature protection device of box dc -to -ac converter, including setting up the temperature -detecting device in box dc -to -ac converter, humidity detection device, respectively with the temperature, the controlling means that humidity detection device connects, the heating device who is connected with controlling means respectively, humidification device, fan and alarm device, the temperature, humidity detection device is used for detecting the temperature and humidity in the box dc -to -ac converter, controlling means carries out the comparison with toset the temperature threshold value and humidity threshold value respectively with the temperature and humidity that detects, and according to comparative result control heating device, whether humidification device and fan work, cross when low when the temperature that detects, controlling means control alarm device sends the sound -light alarm signal. The utility model discloses can avoid low temperature to change the i