Four-way valve detection method and air conditioner

The invention discloses a detection method of a four-way valve and an air conditioner. The detection method comprises the steps that parameter difference values capable of judging abnormal reversing of the four-way valve at different environment temperatures are obtained in advance and serve as parameter difference value threshold values; the current environment temperature is detected to obtain a corresponding parameter difference threshold value, and when the state of the four-way valve is detected, the current parameter difference value is compared with the parameter difference threshold value corresponding to the current environment temperature to judge whether the four-way valve is abnormal or not. According to the method, the environment temperature condition is added before judgment, that is, the corresponding difference values are determined at different environment temperatures firstly, and the difference values corresponding to the environment temperatures are obtained firstly for judgment when the