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膨脹閥的開啟度，應根據當時的庫溫進行調節，即在庫溫相對應的壓力下調整。

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

例：庫溫為-10度，冷庫的蒸發溫度應比庫溫低5度左右，即為-15度，相應的蒸發壓力為0.3MPa左右(R22)。由于存在壓力損失的因素，該調節壓力基本反應在壓縮機的吸氣壓力上。

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.

膨脹閥技術性能的好壞，直接影響其能否正常調節運行的標志。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。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。

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.

調節膨脹閥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。

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。

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.

冷庫制冷溫度下降緩慢，多為操作調整不當所致，其中膨脹閥的調節是最為關鍵的。

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

膨脹閥的開啟度小，制冷劑通過的流量就少，壓力也低;膨脹閥的開啟度大，制冷劑通過的流量就多，壓力也高。

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.

根據制冷劑的熱力性質，壓力越低，相對應的溫度就越低;壓力越高，相對應的溫度也就越高。

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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