热力膨胀阀的工作原理

由此快速通道进入阀门产品分类导航，了解 : 电动控制阀电动蝶阀电动球阀电动闸阀电动截止阀等系列阀门的产品、型号、技术与支持，上海丰企阀门有限公司的高品质产品与优质服务，助您的工程更为精确、安全、高效与稳定。欢迎选购！

原文：
热力膨胀阀的工作原理：　　热力膨胀阀是组成制冷装置的重要部件，是制冷系统中四个基本设备之一。它实现从冷凝压力至蒸发压力的压降，同时控制制冷剂的流量；它的体积虽小，但作用巨大，它的工作好坏，直接决定整个系统的运行性能。但是在实际工作中，热力膨胀阀的运行情况往往被忽视，使热力膨胀阀成为设备维护中的一个死角。而定期检查和调整热力膨胀阀，对制冷设备的运行寿命，节约能源，降低运行成本，却有着重要的意义。　　热力膨胀阀工作原理：热力膨胀阀是通过感受蒸发器出口气态制冷剂的过热度来控制进入蒸发器的制冷剂流量。按照平衡方式不同，热力膨胀阀分为外平衡式和内平衡式。在工业冷却设备中，一般采用外平衡式热力膨胀阀。热力膨胀阀由感应机构、执行机构、调整机构和阀体组成。感应机构中充注氟利昂工质，感温包设置在蒸发器出口处，其出口处温度与蒸发温度之间存在温差，通常称为过热度。感温包感受到蒸发器出口温度后，使整个感应系统处于对应的饱和压力Pb。该压力将通过膜片传给顶杆直到阀芯。在压力腔上部的膜片仅有Pb存在，膜片的下方有调整弹簧的弹簧力Pt和蒸发压力P0，三者处于平衡时有Pb=Pt+Po 。当蒸发器热负荷增大时，出口过热度偏高，Pb增大，Pb>Pt+Po，合力使顶杆、阀芯下移，热力膨胀阀开启增大，制冷剂流量按比例增加。反之，热力膨胀阀开启变小，制冷剂流量按比例减小。因此，制冷设备是由热力膨胀阀通过控制过热度实现制冷系统的自我调整。

“Thermal expansion valve works”是由中国针型阀网提供的国际阀门新闻，译文仅供参考。另外，中国针型阀网还提供相关产品搜索：仪表阀组、仪表球阀(气动管路球阀)、仪表截止阀(气动管路截止阀)、更多针型阀产品、针型阀价格等。

译文：
Thermal expansion valve works: Thermal expansion valve is composed of an important component of refrigeration equipment, refrigeration system is one of the four basic equipment. It is from a condensing pressure to evaporating pressure drop, while controlling the flow of refrigerant; its volume is small, but a huge role, it's good and bad, directly determine the whole system performance. However, in practice, the thermal expansion valve operation is often neglected, so that thermal expansion valve as equipment maintenance in a corner. The regular inspection and adjustment of thermal expansion valve, the operation of refrigeration equipment life, save energy and reduce operating costs, but of great significance. Thermal expansion valve works: the thermal expansion valve is the gas exported through the experience evaporator superheat of refrigerant into the evaporator to control the refrigerant flow. Balanced way according to different thermal expansion valve is divided into outer and inner balanced balanced. In the industrial cooling equipment, the general use of external equilibrium thermal expansion valve. Thermal expansion valve body by the sensor, actuator, adjust the composition of bodies and body. Induction institutions Freon refrigerant charge, set the bulb in the evaporator outlet, the outlet temperature and the temperature difference between the evaporation temperature, often referred to as superheat. Thermal package feel evaporator outlet temperature, the sensor system in the saturation pressure corresponding to Pb. The pressure will pass through the diaphragm mandrel until the spool. The upper part of the diaphragm in the pressure chamber only Pb exists, below the diaphragm spring force to adjust the spring pressure Pt and evaporation P0, three are in balance when Pb = Pt + Po. When the evaporator heat load increases, the export of high superheat, Pb increases, Pb> Pt + Po, together make the mandrel, spool down, thermal expansion valve opening increases, the refrigerant flow rate increased in proportion. Conversely, smaller thermal expansion valve open, the refrigerant flow rate decreases proportionally. Therefore, the cooling device is controlled by the thermal expansion valve superheat by cooling the system to achieve self-adjustment.

更多新闻：

原文来源：
http://www.1zhenxingfa.com/

2011-12-22 08:34