| 摘要 |
PURPOSE:To aim at simplification in constitution and reduction in watt consumption, by utilizing a handy refrigerant feed pump being usually driven by engine output, and making control of a refrigerant liquid level inside a water jacket and recovery of the droplet taken out of the water jacket both come into fruition. CONSTITUTION:If an engine started, solenoid valve 20 is kept in a state of being positioned in a flow passage B while a solenoid valve 21 is kept in a state of being opened, a solenoid valve 24 closed, a solenodi valve 30 opened and a butterfly valve 28 closed respectively, for the specified time long. And, a refrigerant feed pump 10 is started, and a liquidus refrigerant is forcibly fed to the inside of the system from a reservoir tank 4 in the outside of the system, while air in the system inside is discharged to the system outside from an air discharge passage 29. Next, the solenoid valve 20 is set to a flow passage A while the solenoid valve 21 to close, the solenoid valve 24 to open and the solenoid valve 30 to close, respectively, And, when a refrigerant liquid level inside a water jacket 2 becomes below the setting level of a first liquid level sensor 8, the solenoid valve 21 is opened, and the liquidus refrigerant is fed out of a lower tank 15 with a refrigerant feed pump 10 whereby the refrigerant liquid level is kept to the setting level.
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