| 摘要 |
PURPOSE: A hot-water circulating pump for a hot-water heating mat is provided to extend service life of a motor by preventing the heat of hot water inside an impeller from being delivered to the motor made of a stator and a rotor. CONSTITUTION: A hot-water circulating pump(1) for a hot-water heating mat comprises followings. A rotor is set up vertically in the central part of a stator(3) installed inside a lower case(2). An impeller(13) is installed in a rotary shaft projected to the upper part of the rotor. An inlet and an outlet(15) are formed on the upper part of the lower case an upper cover(17) covering the top of the impeller is installed. The rotor(10) comprises a tube-shaped magnet which an axial tube is inserted into. A rotary shaft vertically passes through the axial tube and a bearing is installed at the outer circumference of the rotary shaft.
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