A glass upright cabinet refers to a display cabinet in a mall or supermarket that can refrigerate beverages. Its door panel is made of glass, the frame is made of stainless steel, and the sealing ring is made of silicone. When a mall purchases an upright cabinet for the first time, it is inevitable that the problem of frosting will occur.
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The main reasons for frosting are related to temperature, humidity, and heat exchange:
(1) When the temperature inside the cabinet is lower than the dew point temperature of the surrounding air and further drops below 0°C, the water vapor in the air will first condense into liquid water and then freeze into ice crystals, forming frost.
(2) If the air humidity is high (with sufficient water vapor), the water vapor in a low – temperature environment can directly sublimate (skipping the liquid stage) into solid ice crystals, which is also a common way of frosting.
Essentially, frosting is a phase – change process in which water vapor directly or indirectly transforms from a gaseous state to a solid state under low – temperature conditions.
What are the steps to eliminate frosting in a glass upright cabinet?
The core of avoiding frosting is to reduce the condensation and freezing of water vapor in the air on the low – temperature surface. The following steps can be taken:
Step 1: Set an appropriate temperature
Generally, air conditioners or fans are installed in the mall, so the indoor temperature is not very high. The temperature of the upright cabinet can be set at around 4 degrees Celsius. Avoid setting it too low, which may cause the surface temperature to be lower than the dew point (the critical temperature at which water vapor in the air condenses) for a long time. The temperature should be ensured not to drop below the freezing point.
Different temperature controller settings
Step 2: Reduce the environmental humidity
Due to too high environmental humidity and too low set temperature, frosting will also occur. The water vapor content in the environment should be reduced, for example, by using a dehumidifier, keeping ventilation, or avoiding water vapor sources (such as water leakage, damp items) in a closed space (such as a cold storage).
Step 3: Surface coating treatment
Apply an anti – frosting coating (such as a hydrophobic material) to the surface of the upright cabinet that is prone to frosting to reduce water vapor adhesion, or regularly melt the frost through heating (such as the defrosting heating wire of a refrigerator) to prevent its accumulation.
Step 4: Airflow optimization treatment
Generally speaking, keep the air flowing to avoid the formation of local low – temperature areas. For example, use a fan to disturb the air to reduce the accumulation of water vapor on the cold surface.
The above steps can solve the frosting problem to the greatest extent. This is also a common phenomenon in many glass – door upright cabinets. If such a problem occurs frequently, it is necessary to negotiate with the merchant to solve it.
Nenwell said that most frosting problems are closely related to the equipment. You can choose commercial – brand glass – door upright cabinets, such as the NW – EC/NW – LG/NW – KLG series of beverage display cabinets. They are equipped with professional defrosting equipment and can adjust the temperature intelligently. The latest special – purpose display cabinets for supermarkets and malls on the market accounted for 40% of the sales volume in 2024.
Post time: Jul-30-2025 Views: