Water pump assembly and dishwasher with same

Abstract

The invention discloses a water pump assembly and a dishwasher with the same. The water pump assembly includes a shell, a water inlet pipe, a tension band, an impeller and a motor. An accommodating cavity is defined in the shell. The accommodating cavity is provided with a water outlet and a water inlet. One end of the water inlet pipe is arranged at the water inlet in a matched mode. The tensionband is arranged in the water inlet pipe in a sleeved mode, and the water inlet pipe is fastened to the inner peripheral wall of the water inlet. Inner ring protrusions and outer ring protrusions arearranged on the side, facing the water inlet, of the impeller. Both the inner ring protrusions and the outer ring protrusions are arranged around the rotation axis of the impeller. The outer ring protrusions are arranged at intervals outside the inner ring protrusions. The motor is connected with the impeller to drive the impeller to rotate. The ends, facing the impeller, of the water inlet pipe and the extension band both extend into the accommodating cavity. The outer ring protrusions are located on the radial outer side of the end part of the water inlet pipe, and the inner ring protrusionsare located on the radial inner side of the end part of the extension band. According to the water pump assembly, the liquid backflow between the impeller and the shell is reduced, and the hydraulicefficiency of the water pump assembly is improved.

Description

technical field [0001] The invention relates to the field of dishwasher equipment and parts thereof, in particular to a water pump assembly and a dishwasher having the same. Background technique [0002] The electric dishwasher pump of the prior art generally includes parts such as a pump, a heater assembly, a motor, and mechanical fixation. The pump includes an upper pump casing, a lower pump casing, a plastic cover plate and an impeller. Heater assembly includes pump cover, heating tube, conductive and protective parts, cover plate, rubber tube, ferrule. The motor includes a stator, a rotor, and the rotor also includes a rotor shaft. The stator is mechanically fixed on the outside of the lower pump casing, the rotor is fixed inside the space surrounded by the lower pump casing and the plastic cover plate, the impeller is fixed on the rotor shaft, and the pump cover forms a part of the pump flow channel and is combined with the upper pump casing. One, see attached figur...

AI Technical Summary

Problems solved by technology

[0006] Third, the electric pump has a large channel reduction resistance and a large return flow between the impeller and the pump cover, resulting in a significantly low hydraulic efficiency

The hydraulic efficiency is low, the heated liquid flowing through the pump will flow out slowly, and the heating efficiency is correspondingly low

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