| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure switch having no wrong signal caused by a noise at the transmission time, and connectable in common to a plurality of control devices, relative to the control device for controlling an opening of an electrically-driven expansion valve in a refrigerating cycle. SOLUTION: A single-chip semiconductor pressure sensor is used as a pressure sensor 10g, and digital data corresponding to a detected pressure are transmitted to a microcomputer 10a. A low-pressure cut value and an MOP set value in the refrigerating cycle are set by operation of an operation switch 10h, and stored in EEPROM 10d. The low-pressure cut value, the MOP set value and detected pressure data are transmitted as digital data to the control device through a communication interface 10e. A detected pressure value is displayed in blue by using a blue LED in a digital pressure display 10j, and the power consumption is suppressed. COPYRIGHT: (C)2006,JPO&NCIPI
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