BLOWER AND VACUUM CLEANER

• US 20180163747A1
• Filed: 10/30/2015
• Published: 06/14/2018
• Est. Priority Date: 05/25/2015
• Status: Abandoned Application

• Current Assignee: Nidec Corporation
• Original Assignee: Nidec Corporation
• Inventors: HAYAMITSU, Ryosuke, SAWADA, Tomoyoshi, SHIOZAWA, Kazuhiko
• Application Number:
  US15/576,338
• Publication Number:
  US 20180163747A1
• Time in Patent Office: Days
• CPC Class Codes: A47L 5/22 with rotary fans
• CPC Class Codes: A47L 9/2842 Suction motors or blowers
• CPC Class Codes: F04D 25/0606 the electric motor being specially adapted for integration in the pump
• CPC Class Codes: F04D 25/082 the unit having provision for cooling the motor
• CPC Class Codes: F04D 29/44 Fluid-guiding means, e.g. diffusers
• CPC Class Codes: F04D 29/441 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/58 Cooling of machines or engines in general F01P; Heating; Diminishing heat transfer for the motor of air-pump units F04D25/082; cooling of shafts or bearings F04D29/04
• CPC Class Codes: F04D 29/5806 Cooling the drive system
• CPC Class Codes: F04D 29/582 specially adapted for elastic fluid pumps
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 21/16 having annular armature cores with salient poles with homopolar co-operation H02K21/20
• CPC Class Codes: H02K 5/207 with openings in the casing specially adapted for ambient air
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• CPC Class Codes: H02K 9/14 wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

Abstract

A blower according to an exemplary embodiment of the present disclosure includes a rotor that has a shaft disposed extending vertically, a stator positioned at an outer side of the rotor in a radial direction, a cylindrical housing extending in the axial direction and accommodating the rotor and the stator, and an impeller attached to the shaft, at an upper side from the stator. The stator includes a ring-shaped core back portion, plurality of teeth portions extending from the core back portion toward an inner side in the radial direction, an insulator that covers at least part of the teeth portions, a coil wound on each of the teeth portions via the insulator, and a flow path forming member of which at least part is positioned further at an inner side in the radial direction than the core back portion. The housing has a through hole that opens to the inner side. The flow path forming member connects part of the insulator or the coil at one side in the circumferential direction and part of the insulator or the coil at another side in the circumferential direction, and forms a flow path that passes further at an inner side in the radial direction than the core back portion. The flow path connects to the through hole of the housing.

Claims

1-12. -12. (canceled)

13. A blower, comprising:

a rotor that has a shaft disposed following a central axis extending vertically;

a stator positioned at an outer side of the rotor in a radial direction;

a cylindrical housing extending in the axial direction, that accommodates the rotor and the stator; and

an impeller attached to the shaft, at an upper side from the stator;

wherein the stator includes

a ring-shaped core back portion,

a plurality of teeth portions extending from the core back portion toward an inner side in the radial direction,

an insulator that covers at least part of the teeth portions,

a coil wound on each of the teeth portions via the insulator, and

a flow path forming member of which at least part is positioned further at an inner side in the radial direction than the core back portion,

wherein the housing has a through hole that opens to the inner side,

wherein the flow path forming member connects part of the insulator or the coil at one side in the circumferential direction and part of the insulator or the coil at another side in the circumferential direction, and forms a flow path that passes further at an inner side in the radial direction than the core back portion,

and wherein the flow path connects to the through hole of the housing.

14. The blower according to claim 13, wherein at least part of an inner side face of the core back portion in the radial direction is exposed to the flow path.

15. The blower according to claim 13,

wherein the flow path forming member has

an upper opening that opens to an upper side of the core back portion, and

a lower opening that opens to a lower side of the core back portion,

and wherein the flow path connects the upper opening and the lower opening.

16. The blower according to claim 13,

wherein the flow path forming member covers the coil.

17. The blower according to claim 15,

wherein the lower opening opens toward a lower side in the axial direction.

18. The blower according to claim 17,

wherein the upper opening opens toward an upper side in the axial direction.

19. The blower according to claim 17,

wherein the upper opening opens toward the outer side in the radial direction.

20. The blower according to claim 19,

wherein the flow path forming member has an inclined face that is positioned progressively further at a forward side in rotational direction of the impeller as to the radial direction, the further toward the inner side in the radial direction of the upper opening.

21. The blower according to claim 13,

wherein the flow path forming member is a hollow member positioned between the coils arrayed in the circumferential direction.

22. The blower according to claim 13,

wherein the flow path forming member has a tapered portion where a flow path cross-sectional area progressively increases from the upper side toward the lower side.

23. The blower according to claim 13,

wherein the flow path forming member has

a first tapered portion where the flow path cross-sectional area progressively decreases from the upper side toward the lower side, and

a second tapered portion, positioned at the lower side of the first tapered portion, where a flow path cross-sectional area progressively increases from the upper side toward the lower side.

24. A vacuum cleaner, comprising the blower according to claim 13.