ELECTRIC MOTOR FOR COMPRESSOR, COMPRESSOR, REFRIGERATING CYCLE APPARATUS, AND METHOD FOR MANUFACTURING ELECTRIC MOTOR FOR COMPRESSOR

• US 20170018982A1
• Filed: 04/20/2015
• Published: 01/19/2017
• Est. Priority Date: 05/08/2014
• Status: Abandoned Application

• Current Assignee: Mitsubishi Electric Corporation, SIAM Compressor Industry Company Limited (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Corporation, SIAM Compressor Industry Company Limited (Mitsubishi Electric Corporation)
• Inventors: ARAI, Toshio, OKUGAWA, Sadami, CHANLAKON, Suriwipha, JENWEERAWAT, Nuttagun, ONO, Masashi, TSUTSUMI, Takahiro, KATO, Taro
• Application Number:
  US15/124,067
• Publication Number:
  US 20170018982A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 39/00 Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
• CPC Class Codes: F04B 39/0061 using muffler volumes
• CPC Class Codes: F04C 18/356 with vanes reciprocating with respect to the outer member
• CPC Class Codes: F04C 18/3562 the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
• CPC Class Codes: F04C 2210/26 Refrigerants with particular properties, e.g. HFC-134a
• CPC Class Codes: F04C 2240/40 Electric motor
• CPC Class Codes: F04C 2240/803 Electric connectors or cables; Fittings therefor
• CPC Class Codes: F04C 2240/805 Fastening means, e.g. bolts
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/0085 Prime movers
• CPC Class Codes: F25B 1/04 with compressor of rotary type F25B1/005, F25B1/10 take precedence
• CPC Class Codes: F25B 31/02 of motor-compressor units
• CPC Class Codes: H02K 15/0056 Manufacturing winding connections
• CPC Class Codes: H02K 15/08 Forming windings by laying conductors into or around core parts
• CPC Class Codes: H02K 15/105 to the windings
• CPC Class Codes: H02K 3/04 Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• CPC Class Codes: H02K 3/32 Windings characterised by the shape, form or construction of the insulation
• CPC Class Codes: H02K 3/38 around winding heads, equalising connectors, or connections thereto
• CPC Class Codes: H02K 3/50 Fastening of winding heads, equalising connectors, or connections thereto

Abstract

An aluminum wire, which is an electric wire of an electric motor of a compressor, is wound around a copper wire, which is another electric wire, at interval in the length direction. The portion around which the aluminum wire is wound is brazed with a brazing material containing a flux. Thus, the aluminum wire and the copper wire are joined together, and an electric wire joint section is formed. Insulating paper is mounted to the electric wire joint section. The inner surface of the insulating paper is brought into contact with the surface of the electric wire joint section to which a residue of the flux adheres.

Claims

1. An electric motor for a compressor comprising:

a plurality of electric wires including an aluminum wire, the plurality of electric wires being joined together with a brazing material containing a flux, a joint portion of the plurality of electric wires having a surface of the brazing material to which a residue of the flux adheres; and

an insulating material to cover the joint portion of the plurality of electric wires, the insulating material having an inner surface brought into contact with the surface of the brazing material in the joint portion of the plurality of electric wires.

2. The electric motor for a compressor according to claim 1, wherein one electric wire of the plurality of electric wires is wound around one or more other electric wires at interval in a length direction, and a wound portion is brazed with the brazing material.

3. The electric motor for a compressor according to claim 2, wherein the residue of the flux adheres to a position corresponding to the interval on the surface of the brazing material in the joint portion of the plurality of electric wires.

4. The electric motor for a compressor according to claim 2, wherein the one electric wire is the aluminum wire and the one or more other electric wires are copper wires.

5. The electric motor for a compressor according to claim 4, wherein the copper wires are two or more solid wires parallel to one another.

6. The electric motor for a compressor according to claim 4, wherein the copper wires are a solid wire and a stranded wire parallel to one another.

7. The electric motor for a compressor according to claim 1, wherein a melting point of the brazing material is lower by 150°

C. or more than any melting points of the plurality of electric wires.

8. The electric motor for a compressor according to claim 1, wherein the melting point of the brazing material is 400°

C. or higher.

9. The electric motor for a compressor according to claim 1, wherein the joint portion of the plurality of electric wires and the insulating material are fixed together with varnish.

10. A compressor comprising:

the electric motor for a compressor according to claim 1; and

a compression element to compress a refrigerant by being driven by the electric motor for a compressor.

11. A refrigerating cycle apparatus comprising:

a refrigerant circuit to which the compressor according to claim 10 is connected and in which a refrigerant circulates.

13. The electric motor for a compressor according to claim 1, wherein the brazing material is a Zn—

Al based brazing material.

14. The electric motor for a compressor according to claim 1, wherein the flux includes cesium fluoride.

12. A method for manufacturing an electric motor for a compressor, comprising:

a step for joining a plurality of electric wires including an aluminum wire with a brazing material containing a flux; and

a step for covering a joint portion of the plurality of electric wires with an insulating material and bringing an inner surface of the insulating material into contact with a surface of the brazing material in the joint portion of the plurality of electric wires, to which a residue of the flux adheres.