Abrégé

The present invention relates to an impeller assembly wherein a coupling method between an impeller and magnet is improved, more specifically to an impeller assembly which prevents cracking in the inner circumference of the magnet from external forces by applying a guide screw coupled with the end of the impeller and the inner circumference of the magnet and facilitates assembly and disassembly. Furthermore, the impeller can be used for chemicals, medicines, foodstuffs, etc., because metal components are not used therein. In addition, the present invention relates to a hot water boiler using the impeller assembly. According to the present invention, the impeller assembly with improved assembly efficiency comprises: an impeller with a blade unit and a coupling unit, the guide comprising a corresponding coupling unit coupled with the coupling unit of the impeller, and the magnets which are arranged on the outer circumference of the guide.

Classes IPC  ?

• F24H 9/16 - Dispositions pour purger l’eau

Abrégé

The present invention is a hot water boiler which prevents falling scale from collecting around the drive shaft of the motor by placing a pumping member such as an impeller in the lower part of the water tank and the motor for driving the pumping member is placed on top thereof, so adherence and noise caused by scale are reduced and performance is maintained. Bubble pulverization inside the water tank is enabled through the impeller. In addition, the boiler comprises an air exhaust unit which prevents hot water from leaking through the air exhaust port when a small movable electric boiler used for a hot-water mat is tilted in motion or by impact. The hot water boiler with improved performance according to the present invention comprises: a water tank wherein a discharge port and a retrieval port are formed, a pump housed in the water tank wherein a housing with a water inlet and a water outlet connected to the discharge port and the pumping member embedded in the housing are placed, and a motor which includes a drive shaft connected to the pumping member and is mounted on top of the pump.

Classes IPC  ?

• F24H 1/20 - Appareils de chauffage à accumulation d'eau avec éléments chauffants immergés, p.ex. éléments électriques ou tubes-foyers
• F24H 9/16 - Dispositions pour purger l’eau
• F04B 45/04 - Pompes ou installations de pompage, ayant des organes de travail flexibles, spécialement adaptées pour fluides compressibles ayant des organes flexibles du genre plat, p.ex. des diaphragmes