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The display cooler's air barrier and moisture barrier
author: supermarket refrigerated showcase category: commercial refrigeration Views: 547Time: 2016-08-22
The display cooler's air barrier and moisture barrier
display cooler Due to the large temperature difference between the inside and outside air, a water vapor partial pressure difference corresponding to the temperature difference is inevitably formed, and the water vapor is formed from the high temperature side with the higher partial pressure. It penetrates into the display cooler with lower partial pressure through the enclosure structure. When water vapor passes through the interior of the enclosure and reaches a temperature zone lower than the dew point temperature of the air, the water vapor condenses into water or freezes, causing damage to the thermal insulation structure and degradation of thermal insulation performance. Therefore, it is placed on both sides of the display cooler structure. , When the designed temperature difference is equal to or greater than 5℃, moisture-proof and gas-proof measures should be taken, or a moisture-proof and gas-proof layer should be installed on the side with higher temperature.
Doors, windows, holes. In order to reduce the influence of temperature and humidity changes inside and outside the cabinet, the display cooler cabinet room generally does not open windows. The holes should be opened as few as possible, and the holes should be concentrated as far as possible for equipment pipes such as process, water and electricity. The cabinet door is a necessary passage for the goods in and out of the cabinet, but it is also the place where the heat and moisture exchange between the inside and outside of the cabinet is the most significant. Due to the heat and moisture exchange, condensation and frost are prone to occur around the door. Multiple freeze-thaw cycles will cause the vicinity of the door The building structure materials were damaged. Therefore, the number of doors should be as small as possible under the condition of normal use. At the same time, measures should be taken around the door, such as adding air curtains and heating wires.
reduces heat radiation. In order to reduce the influence of solar radiant heat, the color of the display cooler surface should be light, and the surface should be smooth and flat. Try to avoid large areas of sunlight. Measures can be taken on the top of the floor, such as erecting a ventilation layer to reduce solar radiant heat directly into the cabinet through the roof, thereby affecting the cabinet temperature.
floor anti-frost heave. The civil display cooler is built on the ground, and heat flow is formed due to the temperature gradient between the depth of the foundation and the ground surface, which causes underground water vapor to penetrate into the display cooler foundation. When the temperature of the display cooler floor drops below 0°C, it will cause frost heave and destroy the display cooler floor.
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