The cold storage balance window is used to balance the pressure inside and outside the cold storage and ensure that the door of the cold storage can be opened and closed freely. Its main function is that when the cold storage is cooled from high temperature to low temperature, the indoor pressure will be reduced due to air cooling, resulting in the deformation of the insulation layer of the cold storage due to high outdoor pressure. In addition to deformation, it will be difficult to open the refrigerator door because of the unequal internal and external pressures. Installing a balance window can effectively adjust the pressure balance.
You can look at the balance window produced by Changzhou Keye Plastic Products Co., Ltd.