Antifreeze device for dispensing water, has three-way valve controlled according to operating mode in which first passage is isolated from second passage and first/third passage is closed off to maintain content of vertical water column
摘要
<p>The device (10) has an outside water dispensing pipe (12) connected to a first passage (26) of a three-way slide valve (24). A single control device (34) controls the valve according to two operating modes in which the first passage is in communication with second (28) and third passages (30) of the valve. The valve is controlled according to a third operating mode in which the first passage is isolated from the second passage and the first/third passage is closed off to maintain content of a vertical water column of the pipe for ulterior utilization of water in frost-free season.</p>
