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Large civil walk-in cooler (2)
author: supermarket refrigerated showcase category: walk-in display coolers Views: 573Time: 2016-08-22
Large civil walk-in cooler
Large civil walk-in cooler The wall's influence on the outside temperature change and the heat radiation of the sun, and has good heat insulation and moisture resistance. The walk-in cooler exterior wall is mainly composed of enclosure wall, moisture-proof / insulation layer, insulation layer and inner protective layer. The outer wall of the enclosure generally uses brick walls with a thickness of 240-370mm. Under special conditions, there are also cast-in-place reinforced concrete walls or precast concrete walls. For brick exterior walls, both sides of the exterior wall are plastered with 1:2 cement mortar. Moisture-proof / gas barrier layer, heat insulation layer and inner protective layer are laid in the outer wall in sequence. At present, the newly built walk-in cooler moisture-proof and air-barrier layers are mostly linoleum or new-type nylon film, and are laid on the relatively high temperature side of the thermal insulation layer. The air barrier of the linoleum is generally two felts and three oils. The walk-in cooler insulation layer can be laid or filled with block, plate or loose insulation materials, such as foam plastic, cork, slag, cotton, etc. In some walk-in coolers, there are internal walls to separate the coolers. When the temperature difference between the two neighbors does not exceed 5℃, the non-insulated inner wall can be used, with a 120mm or 240mm thick brick wall and cement mortar on both sides; the insulating inner wall is mostly made of block foam and concrete as the lining wall. Heat insulation and moisture-proof treatment, and plaster the surface with cement mortar. The moisture-proof and gas barrier of the heat-insulated inner wall are made on both sides, or only on the high temperature side.
(4) walk-in cooler roof, floor and attic floor. The walk-in cooler roof should meet the requirements of waterproof, fireproof, frostproof, heat insulation and sealing, and firmness, and the roof should have good drainage. The walk-in cooler roof is mainly composed of a waterproof cover layer, a load-bearing structure layer, and a heat insulation and moisture-proof layer. Walk-in cooler roof insulation structure has three types: slope roof, monolithic and loft. Attic insulation roofs are divided into ventilated, enclosed and mixed types. The floor slab of the multi-layer walk-in cooler is a load-bearing structure for goods and equipment, and should have sufficient strength and rigidity. Walk-in cooler floor slabs can be precast slabs, but on-site reinforced concrete pouring is more common.
(5) Floor anti-frost heave treatment of civil walk-in cooler. Walk-in cooler methods to prevent frost heave on the floor include overhead floor, burying ventilation ducts under the floor insulation layer, or preheating the floor. Small walk-in coolers mostly use prefabricated beams to raise the floor. When using overhead floor anti-freezing, the air inlet and outlet should be no less than 150mm higher than the outdoor ground, and air grids should be installed at the inlet and outlet.
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