Why do some vending machines to set up the gas insulation

Because the vending machine on both sides of retaining structure) Temperature is different, with heat transfer, the moving mobile also occur. The moisture movement is called water vapour permeability. It is has the certain difficulty to blocking water vapor permeability. Even better than blocking heat flux is difficult. And every other gas is defined as: prevent indoor water vapor penetration in the thermal insulation layer of the structural. If in freezing and cold areas, when a vending machine internal structure of condensing interface inside the actual steam penetration resistance is less than the required value, the other area when indoor wet steam may through the vending machine structure layer into the insulation layer, should set the atmosphere. Vending machine insulation if its insulation performance will decline after water be affected with damp be affected with damp, especially with larger absorbent material, in addition to the thermal insulation layer on top of the keep rain out, but also prevent the vending machine external long-term slowly seep into water vapor through the baffle plate thermal insulation layer, the insulating layer formed in the condensation, be affected with damp be affected with damp conditions. Steam trap is to prevent indoor water vapor into the insulation layer of a structural layer, in specification, vapour layer FuZhuCeng belongs to the thermal insulation layer, and not all vending machines need to set the atmosphere. Because the coefficient of thermal conductivity of ice is 2. 0W/( M2K) , than the coefficient of thermal conductivity of polyurethane 0. 02W/( M2K) About 100 times, serious when still can destroy insulating layer. Therefore, in order to ensure good heat insulation insulation performance, prolong service life, maintain the normal use of vending machines, set in the surface of the insulation moisture-proof insulation atmosphere is very important.