Cooling device for infrared window of arc plasma wind tunnel

The invention relates to a cooling device of an arc plasma wind tunnel infrared window, and belongs to the technical field of non-contact infrared temperature measurement. The cooling device comprises a pressing ring and a cooling jacket, the cooling jacket is of an annular structure, the pressing ring is fixedly connected with the end face of one end of the cooling jacket, the arc plasma wind tunnel infrared window is sealed between the pressing ring and the cooling jacket, the end face of the other end of the cooling jacket is connected with the arc plasma wind tunnel body in a sealed mode, and a purging chamber is formed between the cooling jacket and the arc plasma wind tunnel body. A water cooling channel and an air cooling channel which are independent are arranged in the cooling jacket, and the water cooling channel uses water as a cooling medium to cool the infrared window; the air cooling channel guides air as a cooling medium into the purging chamber to cool the infrared window. According to the inv