Title:
HEATING PUMP AND DISH WASHING MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/227476
Kind Code:
A1
Abstract:
A heating pump (104) and a dish washing machine (100). The heating pump (104) comprises: a housing (1), a heating cavity (13) being provided in the housing (1), and the housing (1) being provided with a water inlet (1141) communicated with the heating cavity (13); and an impeller (2), the impeller (2) being provided in the heating cavity (13), the impeller (2) comprising an annular cover plate (21), a first end (211) of the cover plate (21) defining a water inlet port (213) correspondingly communicated with the water inlet (1141) in a surrounding manner, and a second end (212) of the cover plate (21) extending in a direction away from the water inlet (1141) in the axial direction of the impeller (2) and expanding outwards. An annular matching surface (1111) is provided in the heating cavity (13), the outer side of the cover plate (21) is wrapped with the matching surface (1111), and a gap (15) is formed between the matching surface (1111) and the cover plate (21); the matching surface (1111) has a third end (1112) and a fourth end (1113) which are arranged in the axial direction of the impeller (2), the fourth end (1113) corresponds to the second end (212), and the diameter of the fourth end (1113) is larger than or equal to that of the second end (212). By increasing on-way resistance and a blocking structure, the purpose of reducing impeller (2) clearance backflow is achieved, thereby improving the hydraulic efficiency of the water pump.
Inventors:
ZHOU YAYUN (CN)
GONG TAO (CN)
JIN YI (CN)
GONG TAO (CN)
JIN YI (CN)
Application Number:
PCT/CN2020/135049
Publication Date:
November 18, 2021
Filing Date:
December 09, 2020
Export Citation:
Assignee:
FOSHAN WELLING WASHER MOTOR MFG CO LTD (CN)
HUAIAN WELLING MOTOR MFG CO LTD (CN)
HUAIAN WELLING MOTOR MFG CO LTD (CN)
International Classes:
F04D1/00; F04D29/42
Foreign References:
| CN209856049U | 2019-12-27 | |||
| CN205298048U | 2016-06-08 | |||
| CN208749587U | 2019-04-16 | |||
| CN107131154A | 2017-09-05 | |||
| CN204082617U | 2015-01-07 | |||
| EP3587822A1 | 2020-01-01 | |||
| CN202010400830A | 2020-05-13 |
Other References:
See also references of EP 4071361A4
Attorney, Agent or Firm:
YOULINK INTELLECTUAL PROPERTY LAW FIRM (CN)
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