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What are the classification standards for refrigerated trucks?

1 Answers
MilesMarie
09/07/25 3:41am
Refrigerated trucks can be classified according to multiple standards. Classification according to transportation department regulations: Based on the average temperature preservation range inside the refrigerated truck compartment, there are eight levels from A to H. Classification by refrigeration method of the cooling device: According to the refrigeration method of the cooling device, there are mechanical refrigerated trucks, frozen plate refrigerated trucks, ice-cooled refrigerated trucks, etc. Among these, mechanical refrigerated trucks are the main type, and the vast majority of refrigerated trucks in China are also mechanical refrigerated trucks. Classification by chassis load capacity: Based on chassis load capacity, there are micro refrigerated trucks, small refrigerated trucks, medium refrigerated trucks, and large refrigerated trucks. Classification by compartment type: According to compartment type, there are van-type refrigerated trucks, box-type refrigerated trucks, and semi-trailer refrigerated trucks.
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How Does the Automotive Air Conditioning System Work?

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How many kilometers should the Vios brake discs be replaced?

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What Causes Abnormal Noises from the Chassis After Parking?

There are many reasons for abnormal noises from the chassis after parking a car. Below is a detailed analysis of the specific causes of abnormal noises from the chassis after parking: 1. Cooling noise from the catalytic converter: The normal operating temperature of the catalytic converter is 400-800°C. After the engine is turned off, its operation gradually stops, and the temperature decreases, causing the internal metal components to expand and contract due to heat, resulting in abnormal noises. 2. Cooling noise from the exhaust pipe: Typically, the exhaust pipe reaches temperatures above 200°C during cold idle. When the car is under high load or there is combustion of the air-fuel mixture in the exhaust pipe, the temperature can be even higher. Therefore, the exhaust pipe also undergoes thermal expansion and contraction, producing abnormal noises, often originating from the front end of the exhaust pipe and the flexible joint. 3. Cooling noise from the turbocharger: Under normal conditions, the exhaust gas temperature can reach 700°C, accelerating the friction-generated heat from the turbocharger's rapid rotation. After the engine is turned off, the thermal expansion and contraction are quite noticeable, leading to abnormal noises.
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How many seconds does the Trumpchi GS4 take to accelerate from 0 to 100 km/h?

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