| 摘要 |
PURPOSE:To prevent mixing of a coolant into water for supply hot water even when a leakage in a heat exchanger on the side of water for supply hot water by providing means for stopping a compressor by the operation of a pressure switch and simultaneously closing an electromagnetic valve. CONSTITUTION:A heat exchanger 103 on the side of water for supply hot water is constituted of a dual wall pipe comprising an inner pipe 28 having a groove 29 for detecting a leakage formed in at least one of an inside pipe and an outer pipe, and an outer pipe 27 covering on the external part of said inner pipe. A pressure switch 26 is connected to the leakage detecting groove 29 of the inner pipe 28, and electromagnetic switching valves 17 and 18 at the inlet and outlet of a pipe line of water for hot water. Means for stopping compressor 1 and, at the same time, for closing the electromagnetic valves provided in the pipeline of water for supply hot water when the pressure switch 26 is operated is provided. Thus, the pressure switch connected to the inner pipe of the heat exchanger on the side of water for supply hot water detects the leakage of water for supply hot water or the coolant to control means for stopping the compressor and closing the electromagnetic valve provide in the pipeline of water for supply hot water which connect the heat exchanger on water for supply hot water to the hot water storage tank. |
