Ambient temperature detection device and fault judgment method thereof

The invention discloses an ambient temperature detection device. The ambient temperature detection device comprises a temperature parameter acquisition module, a microprocessor module, a control output module and a power supply module, wherein the temperature parameter acquisition module is used for acquiring the current ambient temperature through one or more sensors to generate one or more acquired temperatures; the microprocessor module is connected with the temperature parameter acquisition module, and is used for analyzing the one or more acquired temperatures to judge whether the one or more sensors of the temperature parameter acquisition module has an abnormal condition, or judge whether the current ambient temperature is in a low-temperature state, and generate corresponding control commands; the control output module is connected with the microprocessor module, and is used for generating driving signals according to the control commands of the microprocessor module; and the power supply module is used for supplying power to the temperature parameter acquisition module, the control output module and the microprocessor module. The ambient temperature detection device can effectively distinguish the low-temperature state and a fault state, so that error judgment is prevented. The invention also discloses a fault judgment method for the ambient temperature detection device.