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。

Usually, it is easy to appear the blockage of the filter network, the leakage of the temperature sensitive agent and so on. The regulation reaction is insensitive, the regulation is out of control, or the regulation is uncontrollable.

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;压缩机的吸气压力低于库温下的相对应压力，机器运转温度和排气温度高，制冷温度下降缓慢或降不下，多为膨胀阀的滤网堵塞，或脏堵冰堵故障。

When frost appears at the inlet of the expansion valve (or valve cover, a liquid inlet pipe of the frosting) at room temperature and low temperature ratio, even condensation; suction pressure of the compressor is lower than the corresponding temperature under pressure, machine temperature and high exhaust temperature, cooling temperature drops slowly or drops, to filter the expansion valve plug or, dirty ice blocking fault.

如果膨胀阀出口压力过低，相应的蒸发压力和温度也过低。但由于进入蒸发器流量的减少，压力的降低，造成蒸发速度减慢，单位容积(时间)制冷量下降，制冷效率降低。相反，如果膨胀阀出口压力过高，相应的蒸发压力和温度也过高。

If the outlet pressure of the expansion valve is too low, the corresponding evaporation pressure and temperature are too low. However, the decrease of the flow of evaporator, the decrease of pressure, the slowing of evaporation rate, the decrease of unit volume (time) cooling capacity and the decrease of refrigeration efficiency. On the contrary, if the outlet pressure of the expansion valve is too high, the corresponding evaporation pressure and temperature are too high.

进入蒸发器的流量和压力都加大，由于液体蒸发过剩，过潮气体(甚至液体)被压缩机吸入，引起压缩机的湿冲程(液击)，使压缩机不能正常工作，造成一系列工况恶劣，甚至损坏压缩机。

The flow and pressure of the evaporator increase. Due to the excess liquid evaporation, the excessive gas (or even liquid) is inhaled by the compressor, causing the compressor's wet stroke (liquid attack), so that the compressor can't work properly, resulting in a series of bad working conditions or even damage the compressor.

因此，膨胀阀的开启度，应根据当时的医药冷库库温进行调节，即在库温相对应的压力下调整。膨胀阀调试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。

Therefore, the expansion of the opening degree of the valve, should be adjusted according to the time of the cold storage temperature is adjusted in medicine, temperature corresponding to the pressure. Expansion valve debugging must be carried out carefully and patiently, adjust the pressure and temperature must be through the evaporator heat exchange boiling (evaporation) after the pipe into the suction chamber through the compressor to reflect on the pressure gauge, a process that takes time.

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。

Once the expansion valve is mobilized once, it usually takes 10~15 minutes to stabilize the regulating pressure of the expansion valve on the suction pressure gauge, and the adjustment can not be too urgent. The suction pressure of the compressor is the main parameter to adjust the pressure of the expansion valve.

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The company serves the customer in all directions, with the high quality, the reasonable price and the perfect after sale service and the customers to advance hand in hand, and develop together. Quality assurance, welcome to consult the negotiation.