Views: 1 Author: Site Editor Publish Time: 2020-09-11 Origin: Site
How to improve the insulation performance of the refrigerated car body（1）
With the arrival of midsummer, the demand for refrigerated trucks in the cold chain logistics and transportation industry has gradually increased. If refrigerated truck manufacturers want to gain the favor of major cold chain logistics companies, they must not only have a reasonable price, but more importantly, ensure the refrigeration effect of refrigerated trucks, reduce energy consumption and increase the service life of the vehicles.
To do this, in addition to high-quality refrigeration units, it is also necessary to improve the overall insulation performance of the car body. How can the insulation performance of the refrigerated car body be improved? I will explain to you in terms of refrigerated truck board material, internal structure and sealing performance.
Currently, there are three types of thermal insulation materials commonly used in my country: polyurethane foam, polystyrene foam and extruded polystyrene foam.
Polyurethane foam is the most widely used excellent thermal insulation material. This material has been welcomed by many refrigerated truck companies due to its low thermal conductivity, good thermal insulation performance and high strength. The foam density and bubble diameter of high-quality polyurethane materials are very small. Moreover, polyurethane materials are also suitable for a variety of board-making processes, such as injection foaming, bonding, spraying, etc.
Polystyrene foam is a kind of thermal insulation material made of polystyrene resin. The foam is loose in quality, good in heat insulation, low in water absorption, good in low temperature resistance, and easy to cut, but only the bonding process can be used to make the insulation layer of refrigerated vehicles. Compared with polyurethane materials, polystyrene must achieve the same thermal insulation effect, and the thickness of thermal insulation materials must be increased by at least 20%. As the thickness increases, the quality of refrigerated trucks increases, the load quality decreases, and energy consumption increases.
Extruded polystyrene foam is an insulation material extruded from polystyrene resin and corresponding additives. This kind of thermal insulation material is similar to a honeycomb structure, with uniform thickness and no voids and fractured voids. The extruded polyvinyl material has the advantages of high compressive strength, low thermal conductivity and water absorption, and long service life.
In addition, recently developed a new insulation material-vacuum insulation board, this kind of board heat insulation effect is better, and the installation process is more environmentally friendly and energy saving. At present, the production technology of this material has been quite mature.