油壓(ya)差控(kong)制(zhi)器, MP 54 和 MP 55 型是安全開關,用來(lai)(lai)防止制(zhi)冷壓(ya)縮機(ji)潤滑(hua)油壓(ya)力(li)過(guo)低。如(ru)果(guo)油壓(ya)力(li)下降到設定(ding)(ding)值(zhi)以下,在(zai)一定(ding)(ding)的時(shi)(shi)間(jian)(jian)(jian)間(jian)(jian)(jian)隔后,動(dong)作,使(shi)壓(ya)縮機(ji)停機(ji)。來(lai)(lai)防止制(zhi)冷壓(ya)縮機(ji)潤滑(hua)油壓(ya)力(li)過(guo)低。如(ru)果(guo)油壓(ya)力(li)下降到設定(ding)(ding)值(zhi)以下,在(zai)一定(ding)(ding)的時(shi)(shi)間(jian)(jian)(jian)間(jian)(jian)(jian)隔后,動(dong)作,使(shi)壓(ya)縮機(ji)停機(ji)。
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