| 摘要 |
PURPOSE: A small hot water boiler for a hot water mat, capable of reducing noise by eliminating bubbles, is provided to prevent noise from being generated by bubbles by forming recirculation holes near the outlet of a pump housing. CONSTITUTION: A small hot water boiler for a hot water mat, capable of reducing noise by eliminating bubbles, comprises a water tub(10), a pump housing(40), an impeller(30), and a motor(20). The water tub has a collecting port(W2). The pump housing is formed inside the water tub and has an inlet(46) and an outlet(47). The impeller is formed inside the pump housing. The motor is connected to the impeller and rotates the impeller. Recirculation holes are formed near the outlet of the pump housing so that fluid which is not discharged can be re-circulated through the recirculation holes. |
