膨胀阀的开启度，应根据当时的库温进行调节，即在库温相对应的压力下调整。

The expansion valve opening degree, should be adjusted according to the temperature, adjust the temperature corresponding to the pressure in the.

例：库温为-10度，冷库的蒸发温度应比库温低5度左右，即为-15度，相应的蒸发压力为0.3MPa左右(R22)。由于存在压力损失的因素，该调节压力基本反应在压缩机的吸气压力上。

Example: the temperature of the reservoir is -10 degrees, the evaporation temperature of the cold store should be 5 degrees lower than that of the reservoir temperature, which is -15 degree, and the corresponding evaporation pressure is about 0.3MPa (R22). Because of the pressure loss factor, the regulating pressure basically reflects on the suction pressure of the compressor.

膨胀阀技术性能的好坏，直接影响其能否正常调节运行的标志。通常容易出现过滤网的堵塞、感温剂的泄漏等故障。造成调节反应不灵敏，调节失控或无法调节等。当膨胀阀的进口处出现结霜(或阀盖也结霜)，进液管的温度比常温低，甚至结露。

The technical performance of expansion valve directly affects its normal operation. Usually it is easy to get blockage of filter mesh and leakage of temperature sensitive agent. It results in insensitivity of regulation, uncontrollable adjustment or inability to regulate. When the inlet of the expansion valve is frosted (or the valve cap is frosted), the temperature of the inlet pipe is low or even condensation.

调节膨胀阀必须仔细耐心地进行，调节压力必须经过蒸发器与库温产生热交换沸腾(蒸发)后再通过管路进入压缩机吸气腔反映到压力表上的，需要一个时间过程。

The regulating expansion valve must be carried out carefully and patiently. The pressure must be adjusted through the evaporator and the reservoir temperature to generate heat exchange boiling (evaporation) and then enter the compressor suction chamber through the pipeline to reflect the pressure gauge, which requires a time process.

每调动膨胀阀一次，一般需10~15分钟的时间后才能将膨胀阀的调节压力稳定在吸气压力表上，调节不能操之过急。压缩机的吸气压力是膨胀阀调节压力的主要依据参数。

Every time the expansion valve is activated, it usually takes 10~15 minutes to stabilize the expansion valve's regulating pressure on the suction pressure gauge, so that it can't be haste to adjust. The suction pressure of the compressor is the main parameter to adjust the pressure of the expansion valve.

冷库制冷温度下降缓慢，多为操作调整不当所致，其中膨胀阀的调节是最为关键的。

The temperature drop of refrigerating room is slow, mostly due to improper operation adjustment. The adjustment of expansion valve is the most critical.

膨胀阀的开启度小，制冷剂通过的流量就少，压力也低;膨胀阀的开启度大，制冷剂通过的流量就多，压力也高。

The expansion valve has a small opening degree, a low flow rate of refrigerant and a low pressure. The expansion valve has large opening degree, and the flow rate of refrigerant passes through many, and the pressure is high.

根据制冷剂的热力性质，压力越低，相对应的温度就越低;压力越高，相对应的温度也就越高。

According to the thermodynamic properties of refrigerants, the lower the pressure, the lower the corresponding temperature. The higher the pressure, the higher the corresponding temperature.

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