Common reasons: 1. When the refrigerator is shut down, the pressure of the evaporation system rises, which leads to the leakage of the weak point, the refrigerant interlayer and the bulge of the inner wall of the Freon pressure chamber. So pay attention to the correct way to close the refrigerator. 2. There are quality problems in the refrigerator during processing, and the temperature return is too high when it is stopped at low temperature, which leads to the corresponding internal deformation. Solution: 1 In the actual working process of refrigerator liner, we also need to pay attention to the correct operation mode and method. If the pressure of the evaporation system rises when the refrigerator is closed, it will lead to a working leak in the weak part. If obvious refrigerant leakage is found, ensuring the appropriate refrigerant pressure working range can also solve the problem of inner wall bulging in time. 2. The manufacturer has corresponding quality defects in the actual processing process, especially in the specific application. If the temperature is too high after the low temperature stops, the inner wall will be deformed to some extent. To ensure the correct use and skills, of course, it is also necessary to consider whether the size of the inner wall bulge affects the normal work of the refrigerator and timely repair the interlayer air leakage. Effectively ensure the comprehensive heat exchange effect of the inner wall, whether it will not reduce the refrigeration performance of the refrigerator and improve the fresh-keeping working environment inside the refrigerator.