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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。其功用是：把来自贮液干燥器的高压液态制冷剂节流减压，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，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），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、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。 　

“Application of the gas valve”是由中国截止阀网提供的阀门新闻，译文仅供参考。另外，中国截止阀网还提供相关产品搜索： 直通(流)式截止阀、 角式截止阀、 电站截止阀、 高压截止阀、 波纹管截止阀。等

译文：
Expansion valve works Expansion valve, also known as the throttle, is composed of the main components of the automotive air conditioning and refrigeration systems, installed at the entrance to the evaporator, shown in Figure 15, is the high and low voltage cut-off point of automotive air conditioning and refrigeration systems. Its purpose is: to throttle decompression of high-pressure liquid refrigerant from the drier for the regulation and control of liquid refrigerant into the evaporator, to adapt to changes in cooling load at the same time prevents the compressor occurred fluid hammer (ie, evaporation of liquid refrigerant entering the compressor after the compression, can easily cause damage to the compressor valves) and the outlet of the evaporator vapor abnormal overheating. Automotive air conditioning and refrigeration systems used in thermal expansion valve, also called a thermal expansion valve, which is installed in the evaporator outlet temperature package to perceive the refrigerant vapor superheat (superheat refers to steam temperature is higher than the evaporation temperature values), thereby to adjust the size of the expansion valve opening so as to control the liquid refrigerant flow into the evaporator. , Temperature of the evaporator outlet tube contact with the evaporator outlet temperature decreases, thermal bag, the liquid volume of the cavity in the capillary and film contraction, expansion valve port closed in order to limit the refrigerant into the evaporator. If the evaporator outlet temperature increased, the expansion valve the amount of mouth will open. So as to increase the flow of refrigerant.

更多新闻：

• 燃气阀门应用现状
• 管力阀的应用
• 逻辑阀应用及选型

原文来源：http://www.1jiezhifa.com/

2012-02-03 07:48

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