| 摘要 |
A digital controller is provided to reduce a construction cost more than 80% and apply a display window to verify airtightness and leakage before applying power during constructing. A digital controller includes a pressure sensor(10), a body(1), and a display window(2). The pressure sensor is connected to a connector(11) at a pressure measuring part of a refrigerator. The body is installed inside of a refrigerator unit. The setting value and the deviation value of desired items among low pressure(-1~15kg), high pressure(1~30kg), and oil pressure(1~15kg) are inputted with input key buttons(3~5) to be displayed on the display window. The on/off of the refrigerator, the control of a fan motor of the refrigerator, oil supplying disorder of the refrigerator, and device protection due to increasing abnormality pressure are controlled by using the switching contacts of an LPS(Low Pressure Switch), an HPS(High Pressure Switch), an HPC(Hydraulic Pressure Control), and an OPS(Oil Pressure Switch).
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