Dantherm DAC20-450D, Service Manual

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7
4 Description of functionality
功能描述 功能描述 功能描述 功能描述
General Description
总体描述 总体描述 总体描述 总体描述
The air conditioner contains a compressor, evaporator, condenser, condenser fans, and various cooling
components as expansion valves, dry filter and an internal fan. The internal cabinet air is continuously circu-
lated in a closed loop by the evaporator fan. This draws warm air from the Top cabinet and supplies the
internal environment with cooled air in the bottom area via the evaporator coil. Heat is transferred from the
internal air to the refrigerant and exhaust to the ambient air through the condenser coil. The closed loop
internal circuit protects the enclosed equipment all types of hostile environments and control the internal
thermal conditions with clean air.
The Air conditioner is designed as an on/off system, where the control board controls the compressor in
accordance to the return temperature. When the active cooling is operating the condenser fan full speed
running. The unit will work in extreme temperatures ranging from -5ºC to +55ºC. Internal side working hu-
midity ranging from 0%---75%
空调主要包括压缩机、蒸发器和冷凝器、冷凝风扇以及如膨胀阀、干燥过滤器和内风扇等各种冷却装置。内
部空气随着蒸发器风扇而循环流动。热空气从顶部进入，经过蒸发器冷却后由下部出口排出。热量从内部空
气传递到制冷剂，然后通过冷凝器排放到外部环境中。这个闭环内电路保护了所有不良环境类型下的附属设
备，以洁净的空气调节内部环境。
空调作为开关系统设计，控制板控制着压缩机与回风温度相一致。当机器主动运行时冷凝风扇全速运行。此
空调的工作温度范围是：
-5ºC
到
+55ºC
。内侧工作湿度
0%--75%
。
Active parts
主要零件
The active parts that are controlled by the Control board are:
Compressor
Condenser fan
控制板控制的主要零件有：
压缩机
冷凝风扇