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Pub. No.:    WO/2018/008839    International Application No.:    PCT/KR2017/005036
Publication Date: Fri Jan 12 00:59:59 CET 2018 International Filing Date: Wed May 17 01:59:59 CEST 2017
IPC: F04D 29/66
F04D 29/24
F04D 13/06
F04D 29/40
F04D 29/00
Applicants: NEW MOTECH CO., LTD.
Inventors: JANG, Jeong Cheol
LEE, Kyoung Joo
YANG, Hyun Sung
KANG, Min Seok
The pump for circulating water according to the present invention comprises an upper housing 10 formed with an inlet 11 and an outlet 12 of fluid; a lower housing 20 arranged and installed to fit in a lower side of the upper housing 10, having a receiving space formed therein; an inner housing 30 having an edge part interposed between the upper housing 10 and the lower housing 20, and a shaft supporting part 32 formed in a lower part of the center of a bottom part of an impeller receiving groove 31 formed in a middle part; an impeller 50 received inside the upper housing 10 and in the impeller receiving groove 31 to be rotatably installed, so as to form a flow pathway 40 with an inner surface of the inner housing 30 for the flow of fluid; a rotor 60 installed inside an outer circumference of the impeller 50; and a stator 70 installed in a receiving space between the inner housing 30 and the lower housing 20 to fit in with the rotor 60, wherein the pump for circulating water is formed with a plurality of inclined discharge holes 52C interconnected with the flow pathway 40 in a body 51 of the impeller 50 so that the fluid inside the flow pathway 40 is discharged to the upper side, is formed with an outlet of the inclined discharge hole 52C at a side surface of the impeller body 51 between a lower part of a base plate 54 formed with a wing piece 53 of the impeller and an upper part of a rotor receiving part 51d having a rotor receiving space 51d', and is configured to mix fluid inside the flow pathway 40 rising through the inclined discharge hole 52C and fluid introduced through the inlet 11 in a mixing space S and discharge the mixed fluid through the outlet 12.