关键词: 外部水源；防水优化；冷凝水；温度提升

Abstract: The most basic function of the heavy truck cab is to ensure the safety of the passengers and provide a comfortable driving environment. In parts of northern China in winter, there will be condensation water in the cab after driving for a period of time. This paper starts with the cab structure, analyzes the way the external water source enters the cab and verifies it, puts forward waterproof optimization suggestions from the aspects of optimizing the sealing structure and assembly technology of the cab; analyzes the causes of condensation water inside the cab, and gives the calculation method of condensation water quantity; studies the different gold margins and insulation layer thickness. On the influence of the surface temperature of the cab, an optimization measure is proposed to raise the surface temperature of the cab to the temperature above the dew point of condensed water.

Key words: External water source; Waterproofing; Condensation water; Temperature rise