Chengli Refrigerated Truck: Selection and Usage Guidelines Today, refrigerated trucks are widely used in daily life. They transport a variety of temperature-sensitive goods—including fresh vegetables and fruits, meat, eggs, frozen foods, aquatic products, and ice cream. Specialized applications, such as pharmaceutical logistics, also rely on refrigerated trucks. Given their broad applicability, what key factors should be considered when purchasing one? Structural Features of Refrigerated Trucks A refrigerated truck comprises the following main components: - Chassis; - Insulated cargo body (constructed from materials such as fiberglass-reinforced plastic [FRP], color-coated steel, aluminum alloy, or stainless steel); - Intermediate thermal insulation layer (typically polyurethane foam); - Refrigeration unit; - Temperature data logger. For specialized applications—e.g., meat transport vehicles—additional equipment such as meat hooks, aluminum alloy guide rails, and ventilation channels can be installed. Cargo Body Manufacturing Technology Domestic large-scale refrigerated truck manufacturers predominantly employ the “sandwich panel” assembly method, wherein pre-fabricated panels are bonded together. Both inner and outer skins are made of composite materials—such as FRP, color-coated steel, or aluminum alloy. Inner lining material selection depends on cargo type: stainless steel offers superior durability and hygiene but commands a higher cost. The core insulation layer consists primarily of rigid polyurethane foam. High-strength adhesive bonds the outer FRP skin to the polyurethane core on all four sides, forming a fully sealed, structurally robust panel. Selecting the Right Refrigerated Truck Different cargo types impose distinct requirements on the cargo body: - For fresh meat transportation, custom-installed meat hooks must be fitted—quantity determined by operational demand; - For retail distribution (e.g., convenience stores or supermarkets), where small-batch, multi-item deliveries are common, multi-temperature-zone refrigerated trucks are recommended; - For high-frequency loading/unloading of goods requiring uniform temperature control, multi-door Chengli refrigerated trucks provide optimal efficiency. Refrigeration Units: Independent vs. Non-Independent Systems Refrigeration units are categorized by power source: - **Independent units**: Equipped with a dedicated power source (e.g., a separate diesel engine or electric motor), enabling operation without drawing power from the vehicle’s chassis battery—thus preserving battery life and ensuring uninterrupted cooling during extended stops. - **Non-independent units**: Driven directly by the vehicle’s main engine via a power take-off (PTO) system. This configuration requires the engine to run continuously during refrigeration operation, increasing fuel consumption and engine wear. Independent Refrigeration Unit Configuration Most refrigerated trucks mount the refrigeration unit externally atop the front of the cargo box—resembling a wall-mounted household air conditioner in appearance, yet delivering significantly greater cooling capacity per unit volume. While most models use externally mounted units, some micro-refrigerated trucks adopt internal mounting. For ultra-low-temperature applications, internal evaporator plates may be integrated into the cargo compartment walls. Refrigeration unit capacity (cooling power) is selected based on cargo box volume and required temperature range. Non-Independent Refrigeration Unit Configuration Selecting an appropriate Chengli refrigerated truck demands careful evaluation—not only of purchase price, but also structural integrity, build quality, and long-term reliability. The optimal choice balances performance, durability, and total cost of ownership. Critical Consideration: Temperature Control Refrigerated trucks are purpose-built for transporting and storing temperature-sen