Patent ID: 8826732
Filing Date: 2014-09-09
Classification: F25D,G05D

Abstract:
1. A cyclically liquid feeding apparatus comprising: an outer tank storing a first liquid adjusted to a required temperature; an inner tank installed in the interior of the outer tank so as to be located above the first liquid and storing a second liquid adjusted to a temperature different from that of the first liquid; a valve unit feeding the first liquid and the second liquid to a load solely or in mixture; an outer tank liquid circulating channel including an outer tank feed channel feeding the first liquid in the interior of the outer tank to the valve unit and an outer tank return channel returning the liquid from the valve unit into the outer tank; an inner tank liquid circulating channel including an inner tank feed channel feeding the second liquid in the interior of the inner tank to the valve unit and an inner tank return channel returning the liquid from the valve unit into the inner tank; a first opening-and-closing valve opening and closing a first bypass flow channel which connects the outer tank feed channel and the inner tank return channel; a second opening-and-closing valve configured to open and close a second bypass flow channel which connects the inner tank feed channel and the outer tank return channel; and liquid level sensor means provided respectively on the outer tank and the inner tank and configured to selectively open the first opening-and-closing valve and the second opening-and-closing valve to adjust the liquid levels when the liquid levels of the first liquid and the second liquid are uneven between the two tanks.