Control circuit through the loading or unloading coolant compressor and make the air-freeze agent in the heat exchanger compressed air temperature constant.

控制电路通过加载或卸载冷冻剂压缩机而使空气-冷冻剂热交换器中的压缩空气温度保持恒定。

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Integrating the dryer, unloading valve and multi-circuit protective valve, the air processing unit (APU) makes the pipeline more compact and reliable.

空气处理单元APU，集干燥器、卸载阀、多回路保护阀的功能于一体，使整车管路简洁可靠；

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