| 摘要 |
PROBLEM TO BE SOLVED: To improve much more the reliability of switching control of a flow passage switching valve in a refrigerating cycle. SOLUTION: The flow passage switching valve 100 for the refrigerating cycle A is so constituted that the flow passage of high-pressure fluid is communicated with the flow passage of low-pressure fluid in the valve body of the same. An excitation driving process, in which the flow passage mode of the flow passage switching valve 100 is not switched, is provided different from a switching driving process, in which the flow passage mode of the flow passage switching valve 100 is switched from a cooling mode into a heating mode or from the heating mode into the cooling mode. A control process, in which the solenoid coil of the flow passage switching valve 100 is excited by the switching driving process after 10 sec from starting a compressor 4 and the excitation of the solenoid coil is turned off after 10 second, is provided. Otherwise, another control process, in which the compressor 4 is started after 10 sec from the excitation of solenoid coil of the flow passage switching valve 100 while the excitation of the solenoid coil is turned off after 10 sec, is provided. |
