| 摘要 |
<p>A water backflow prevention device preventing the backflow of water in a hot-water regulator of a hot-water mat is classified into three shapes. The first shape is that a backflow tank capable of fully storing the whole water inside the hot-water regulator and the mat is combined with the hot-water regulator. The second shape is that an upper pressure control hole is blocked to block the inside and the outside as the backflow tank storing some portion of the water and a float unit disposed at the upper part of the backflow tank by the buoyancy of water passing through a lower pressure control hole rise and are attached to a compression plate. Air or vapor can moves between the inside and the outside while a pressure valve is opened by a pressure difference in water circulation by placing the backflow tank storing some portion of the water and installing the pressure valve at the upper part of the backflow tank. The third shape is that the water from the hot-water regulator is blocked by the pressure of the air inside the sealed backflow tank by closing the pressure valve when the circulation of water stops.</p> |
