Hermetic motor driven fluid apparatus having improved insulating structure
First Claim
1. In a hermetic motor driven fluid apparatus comprising a housing;
- a compression mechanism disposed within said housing; and
a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism, and a motor operatively connected to said drive shaft for rotating said drive shaft, the improvement comprising;
a portion of a surface of said housing being insulatingly covered by a film of an electrical insulation material.
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Accused Products
Abstract
An improved electrical insulation structure is provided for a motor driven fluid apparatus having the compression and drive mechanisms within a hermetically sealed housing. The drive mechanism comprises a drive shaft operatively connected to the compression mechanism and a motor for rotating the drive shaft. The motor comprises a rotor fixedly surrounding the drive shaft and a stator assembly surrounding the rotor with a small radial air gap therebetween. The stator assembly comprises an annular magnetic core fixedly secured to the housing. The core has a plurality of axially extending slots and a plurality of windings, each having a plurality of coils formed by multiple turns of an enamel-coated conductor. The multiple turns of the conductor have side turn portions which are disposed within the axially extending slots and end turn portions which axially project from the slots and are generally disposed about the axial end surfaces of the core. The connection points between the windings themselves, and between the windings and conductor leads, are fixedly covered with a film of insulating material, such as epoxy resin. Alternatively, a portion of the surface of the housing is fixedly covered with a film of insulating material, such as aluminum oxide formed by anodization.
33 Citations
28 Claims
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1. In a hermetic motor driven fluid apparatus comprising a housing;
- a compression mechanism disposed within said housing; and
a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism, and a motor operatively connected to said drive shaft for rotating said drive shaft, the improvement comprising;a portion of a surface of said housing being insulatingly covered by a film of an electrical insulation material. - View Dependent Claims (2, 3, 6, 11, 16)
- a compression mechanism disposed within said housing; and
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4. In a hermetic motor driven fluid apparatus comprising a housing;
- a compression mechanism disposed within said housing; and
a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism, and a motor operatively connected to said drive shaft for rotating said drive shaft, the improvement comprising;a portion of a surface of said housing being insulatingly covered by a film of an electrical insulation material; said housing is made of an aluminum alloy; and
,said film comprising a film of aluminum oxide formed by anodization.
- a compression mechanism disposed within said housing; and
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5. A hermetic motor driven fluid apparatus comprising an aluminum alloy housing:
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a compression mechanism disposed within said housing; and a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material, said film comprising a film of aluminum oxide formed by anodization; and wherein said film has a thickness in the range of from about 15 μ
m to about 50 μ
m. - View Dependent Claims (27, 28)
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7. A hermetic motor driven fluid apparatus comprising a housing;
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a stator assembly separate from said housing; a compression mechanism disposed within said housing; a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; and a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material; wherein said electrical insulation material comprises a material selected from the group consisting of epoxy resin, urethane resin, silicone, phenol resin, urethane resin, butyl rubber, ethylene propylene rubber, chloroprene rubber, and nitrile-butadiene rubber; and wherein said film is formed by powder coating. - View Dependent Claims (8)
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9. A hermetic motor driven fluid apparatus comprising a housing;
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a stator assembly separate from said housing; a compression mechanism disposed within said housing; a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; and a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material; wherein said electrical insulation material comprises a material selected from the group consisting of epoxy resin, urethane resin, silicone, phenol resin, urethane resin, butyl rubber, ethylene propylene rubber, chloroprene rubber, and nitrile-butadiene rubber; and wherein said film is formed by dip coating. - View Dependent Claims (10)
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12. A hermetic motor driven fluid apparatus comprising a housing;
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a compression mechanism disposed within said housing; a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; and a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material; wherein said electrical insulation material comprises a material selected from the group consisting of epoxy resin, urethane resin, silicone, phenol resin, urethane resin, butyl rubber, ethylene propylene rubber, chloroprene rubber and nitrile-butadiene rubber; and wherein said film is formed by application and has a thickness in the range of from about 15 μ
m to about 50 μ
m.
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13. A hermetic motor driven fluid apparatus comprising a housing;
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a stator assembly separate from said housing; a compression mechanism disposed within said housing; a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; and a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material; and wherein said housing has an interior surface and an exterior surface, and wherein a portion of said interior surface is insulatingly covered by said film.
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14. A hermetic motor driven fluid apparatus comprising a housing;
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a compression mechanism disposed within said housing; a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; and a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material; and wherein said housing has an interior surface and an exterior surface, and wherein a portion of said exterior surface is insulatingly covered by said film.
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15. A hermetic motor driven fluid apparatus comprising a housing;
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a compression mechanism disposed within said housing; a drive mechanism disposed within said housing, said drive mechanism comprising a drive shaft operatively connected to said compression mechanism; and a motor operatively connected to said drive shaft for rotating said drive shaft; wherein a portion of a surface of said housing is insulatingly covered by a film of an electrical insulation material; and wherein said housing comprises a plurality of housing portions, which are releasably and hermetically connected to define a plurality of mating surfaces therebetween, and wherein at least a portion of at least one of said plurality of mating surfaces is insulatingly covered by said film.
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17. A method of electrically insulating a stator assembly, comprising the steps of:
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disposing the stator assembly within a housing; and insulatingly covering at least a portion of the surface of the housing with a film of an electrical insulation material. - View Dependent Claims (20, 25)
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18. A method of electrically insulating a stator assembly, comprising the steps of:
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disposing the stator assembly within a housing; insulatingly covering at least a portion of the surface of the housing with a film of an electrical insulation material; wherein the housing is formed from an aluminum alloy; and
,wherein the covering step comprises anodizing the housing to form a film of aluminum oxide.
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19. A method of electrically insulating a stator assembly, comprising the steps of:
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disposing the stator assembly within an aluminum alloy housing; and insulatingly covering at least a portion of the surface of the housing with a film of an electrical insulation material, said covering step comprising the steps of; anodizing the housing to form a film of aluminum oxide; and forming the film to have a thickness in the range of from about 15 μ
m to about 50 μ
m.
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21. A method of electrically insulating a stator assembly, comprising the steps of:
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disposing the stator assembly within a housing; wherein said stator assembly is separate from said housing; and insulatingly covering at least a portion of the surface of the housing with a film of an electrical insulation material, the electrical insulation material selected from the group consisting of epoxy resin, urethane resin, silicone, phenol resin, urethane resin, butyl rubber, ethylene propylene rubber, chloroprene rubber, and nitrile-butadiene rubber, said covering step comprising the step of; forming the film by powder coating. - View Dependent Claims (22)
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23. A method of electrically insulating a stator assembly, comprising the steps of:
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disposing the stator assembly within a housing; wherein said stator assembly is separate from said housing; and insulatingly covering at least a portion of the surface of the housing with a film of an electrical insulation material, the electrical insulation material selected from the group consisting of epoxy resin, urethane resin, silicone, phenol resin, urethane resin, butyl rubber, ethylene propylene rubber, chloroprene rubber, and nitrile-butadiene rubber, said covering step comprising the step of; forming the film by dip coating. - View Dependent Claims (24)
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26. A method of electrically insulating a stator assembly, comprising the steps of:
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disposing the stator assembly within a housing; and insulatingly covering at least a portion of the surface of the housing with a film of an electrical insulation material, the electrical insulation material selected from the group consisting of epoxy resin, urethane resin, silicone, phenol resin, urethane resin, butyl rubber, ethylene propylene rubber, chloroprene rubber, and nitrile-butadiene rubber, said covering step comprising the step of; forming the film by application to have a thickness in the range of from about 15 μ
m to about 50 μ
m.
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Specification