原文：
膨胀阀也称节流阀，是组成汽车空调制冷系统的主要部件，安装在蒸发器入口处，如图15所示，是汽车空调制冷系统的高压与低压的分界点。水力控制阀其功用是：把来自贮液干燥器的高压液态制冷剂节流减压，低温阀门调节和控制进入蒸发器中的液态制冷剂量，使之适应制冷负荷的变化，同时可防止压缩机发生液击现象(即未蒸发的液态制冷剂进入压缩机后被压缩，过滤器极易引起压缩机阀片的损坏)和蒸发器出口蒸气异常过热。汽车空调制冷系统采用的感温式膨胀阀，也叫热力膨胀阀，它是利用装在蒸发器出口处的感温包来感知制冷剂蒸气的过热度（过热度是指蒸气实际温度高于蒸发温度的数值），排气阀、排泥阀由此来调节膨胀阀开度的大小，从而控制进入蒸发器的液态制冷剂流量。感温包和蒸发器出口管接触，蒸发器出口温度降低时，感温包、 鸭嘴阀毛细管和薄膜上腔内的液体体积收缩，膨胀阀阀口将闭合，借以限制制冷剂进入蒸发器。相反.如果蒸发器出口温度升高，膨胀阀量口将开启。借以增加制冷剂流量。

“ Automotive Air Conditioning System Expansion Valve works ”是由中国电动阀门网提供的阀门行业新闻，译文仅供参考。另外，中国电动阀门网还提供相关产品搜索： 电动隔膜阀、 电动调节控制阀、 电动执行器与附件、 更多电动阀门产品、 电动阀门价格等。

译文：
Also known as throttle expansion valve, automotive air conditioning system is composed of the main components installed in the evaporator entrance, shown in Figure 15, a car air conditioning system, fire pumpshigh pressure and low pressure cut-off point. Its purpose is: to come from high-pressure drier for throttling liquid refrigerant decompression, regulate and control access to the evaporator liquid refrigerant to adapt changes inVacuum pumps cooling load, and prevent the occurrence of liquid hammer compressor (no evaporation of liquid refrigerant into the compressor after compression, can easily cause damage to the compressor valves) and the export steam evaporator abnormal overheating. Automotive air conditioning refrigeration systems used in temperature-type expansion valve, also known as thermalSplit case pumps expansion valve, which is installed in the evaporator using the exit package to sense the temperature of the refrigerant vapor superheat Oil pumps(superheat is higher than the actual temperature of evaporation of steam temperature value), thereby to adjust the size of expansion valve opening to control the liquid into the evaporator, In-line pumpsthe refrigerant flow. , Temperature of the evaporator outlet tube and contacts the evaporator outlet temperature decreases, the temperature package, capillary and the liquid film on the cavity volume contraction, expansion valve port will be closed to restrict refrigerant into the evaporator. On the contrary. If the evaporator outlet temperature, the volume of export expansion valve will open. To increase the refrigerant flow.

原文来源：http://www.1diandongfamen.com/

2010-08-26 07:00

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