用压差调节阀形成的压差克服蒸发器内制冷剂的流动阻力，把低压液体制冷剂超量供入蒸发器。
Using the pressure difference formed by pressure difference regulating valve, overcome flow resistance of refrigerant in evaporater, supply excess low pressure liquid refrigerant for evaporater.
这种结构特征使得摇动摇杆时，器身内的液体进入到储气室的阻力大大减小，操作者能明显感到轻松。
The structure makes the operator feel easy obviously due to the fact that the resistance of the liquid entering the air storage chamber is greatly reduced when the rocker rocks.
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