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通常容易出現過濾網的堵塞、感溫劑的泄漏等故障。造成調節反應不靈敏，調節失控或無法調節等。

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.

當膨脹閥的進口處出現結霜(或閥蓋也結霜)，進液管的溫度比常溫低，甚至結露;壓縮機的吸氣壓力低于庫溫下的相對應壓力，機器運轉溫度和排氣溫度高，制冷溫度下降緩慢或降不下，多為膨脹閥的濾網堵塞，或臟堵冰堵故障。

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.

如果膨脹閥出口壓力過低，相應的蒸發壓力和溫度也過低。但由于進入蒸發器流量的減少，壓力的降低，造成蒸發速度減慢，單位容積(時間)制冷量下降，制冷效率降低。相反，如果膨脹閥出口壓力過高，相應的蒸發壓力和溫度也過高。

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.

進入蒸發器的流量和壓力都加大，由于液體蒸發過剩，過潮氣體(甚至液體)被壓縮機吸入，引起壓縮機的濕沖程(液擊)，使壓縮機不能正常工作，造成一系列工況惡劣，甚至損壞壓縮機。

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，膨脹閥的開啟度，應根據當時的醫藥冷庫庫溫進行調節，即在庫溫相對應的壓力下調整。膨脹閥調試必須仔細耐心地進行，調節壓力必須經過蒸發器與庫溫產生熱交換沸騰(蒸發)后再通過管路進入壓縮機吸氣腔反映到壓力表上的，需要一個時間過程。

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.

每調動膨脹閥一次，一般需10~15分鐘的時間后才能將膨脹閥的調節壓力穩定在吸氣壓力表上，調節不能操之過急。壓縮機的吸氣壓力是膨脹閥調節壓力的主要依據參數。

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.