The utility model discloses an observation window
assembly which comprises an observation window body, a switching mechanism and a heat preservation
assembly, the observation window body is provided with a window used for observation, the switching mechanism is arranged on the observation window body, the heat preservation
assembly is arranged on the switching mechanism, the switching mechanism can switch the heat preservation assembly to a first position and a second position, and the heat preservation assembly is arranged on the switching mechanism under the first position. The heat preservation assembly can cover the outer wall of the window at the first position and can open the window at the second position. The switching mechanism can cover the heat preservation assembly or open the window of the observation window body, when observation is not conducted, the heat preservation assembly can cover the window for heat preservation, the
temperature difference between the inside and the outside of the window can be reduced, and therefore gas condensation on the inner wall of the window can be reduced, and when observation is needed, the observation window can be opened for observation temporarily, and the inner wall of the window can be kept clean and convenient to observe. Frequent cleaning is not needed, the window may be broken, when the heat preservation assembly is located at the second position, window breaking
impact can be buffered, and safety is good.