EP2517337A1 - A hermetic compressor comprising an insulating element - Google Patents

A hermetic compressor comprising an insulating element

Info

Publication number
EP2517337A1
EP2517337A1 EP10795326A EP10795326A EP2517337A1 EP 2517337 A1 EP2517337 A1 EP 2517337A1 EP 10795326 A EP10795326 A EP 10795326A EP 10795326 A EP10795326 A EP 10795326A EP 2517337 A1 EP2517337 A1 EP 2517337A1
Authority
EP
European Patent Office
Prior art keywords
winding head
insulating element
stator
compressor
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10795326A
Other languages
German (de)
French (fr)
Inventor
Tugba Cetinturk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
Original Assignee
Arcelik AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of EP2517337A1 publication Critical patent/EP2517337A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—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
    • F04B39/06—Cooling; Heating; Prevention of freezing

Definitions

  • the present invention relates to a hermetic compressor comprising an insulating element placed on the stator windings.
  • the stator of the hermetic compressor motor used in cooling devices such as refrigerators is produced by placing windings composed of conducting wires into the slots on the stator stack composed of magnetic sheets and the windings form the parts referred to as winding head by extending towards the outside through the opposite faces of the stator stack.
  • a metal compressor block placed on the stator and the compressor block carries basic mechanical elements such as cylinder, piston, crank and piston rod.
  • the compressor block is seated onto the stator stack such as to be over the winding head.
  • a gap of minimum 2 mm has to be left between the compressor block and the winding head for security reasons such that no current jump (electric leakage) between the winding wires and the block occur when current is applied to the stator windings.
  • stator windings are pressed in special presses to be formed.
  • stator windings In most situations, the number of stator windings requires to be increased for positive contribution to compressor motor efficiency; however the safety gap required to be left between the compressor block and the windings prevents the number of windings from being increased.
  • insulating elements produced from thin isolative plastic film having a thickness of 0.15-0.20 mm are placed between the stator winding head and the compressor block, however placing these insulating elements into the compressor motor creates problems especially in terms of labor due to the shape of the winding head and the compressor block.
  • the insulating element comprises a peripheral edge region seating onto the coil core and additional insulating extensions providing insulation between the flange extensions of the cylinder housing and the winding head.
  • the aim of the present invention is the realization of a hermetic
  • the hermetic compressor realized in order to attain the aim of the present invention, and explicated in the first claim and the respective claims thereof comprises a stator having the stator stack to which the windings composed of conducting wires are placed, a winding head composing the portion of the windings extending towards outside from the upper surface of the stator stack and a compressor block seated on the upper surface of the stator stack and a ring shaped (toroidal) insulating element produced from plastic and mounted onto the winding head.
  • the vertical cross-section of the insulating element having toroidal body is in downward facing C shape, the insulating element has a housing placed therein and into which the winding head is placed.
  • the insulating element is
  • the insulating element shrinks by being heated after being mounted onto the winding head, adheres onto the winding head and a permanent connection is obtained by taking the shape of the winding head.
  • the insulating element has an opening formed by cutting out a portion of the ring-shaped body and enables the electrical connections of the winding heads extending towards outside from the winding head. Since the opening is located in alignment with the recess on the compressor block, there is no risk of the winding head contacting the compressor block at the region where the opening is located.
  • the insulating element is fitted to the winding head, is easily mounted onto the winding head due to its ring shape surrounding the winding head like a sleeve and provides insulation by covering the winding head. No binding cord holding the windings together is required on the winding head on which the insulating element is used.
  • Figure 1 - is the cross sectional view of a hermetic compressor.
  • Figure 2 - is the perspective view of a compressor block.
  • Figure 3 - is the perspective view of an insulating element.
  • Figure 4 - is the perspective view of a stator.
  • Figure 5 - is the perspective view of a stator on which an insulating
  • the hermetic compressor (1) suitable for being used in cooling devices such as refrigerators comprises a casing (2), a stator (5) located in the casing (2), having a stator stack (3) composed of laminations and one or more than one winding (4) composed of conducting wires wound on the slots on the stator stack (3), more than one winding head (6) forming the portions of the windings (4) extending towards outside from the opposite faces of the stator stack (3) and a compressor block (7) carrying and/or bearing basic mechanical elements such as cylinder, piston, crank and piston rod, mounted onto the upper side of the stator stack (3) such that the lower surface thereof does not contact the upper side of the winding head (6).
  • the hermetic compressor (1) of the present invention comprises a
  • ring-shaped (toroidal) insulating element (10) produced from plastic material, mounted onto the winding head (6) and surrounding the winding head (6) like a sleeve.
  • the insulating element (10) has a body (8) the vertical cross-section of which is in downward facing C shape and a housing (9) located in the body (8) and into which the winding head (6) is placed.
  • the housing (9) is enlarged by stretching the arms of the body (8) forming the C-shape such as to move away from each other to mount the insulating element (10) to the winding head (6) and the insulating element (10) is mounted onto the winding head (6) by being pushed in the axial direction by means of an easy manual labor.
  • the insulating element (10) is produced from heat shrink material.
  • the stator (5) is placed into an oven the temperature of which is adjusted for this operation and the insulating element (10) is heated.
  • the insulating element (10) adheres to the windings (4) by shrinking due to heat and takes the shape of the winding head (6), a permanent connection is obtained.
  • the insulating element (10) comprises an opening (1 1 ) formed by cutting out a portion of the body (8) and when the insulating element (10) is mounted to the winding head (6), which enables the electrical connections of the winding (4) ends extending towards outside from the winding head (6) by being aligned with the portion where the electrical connections of the winding (4) ends are made.
  • the insulating element (10) does not cover the winding head (6) at the region where the opening (1 1 ) is located.
  • the electrical connections are made by extending the winding (4) ends towards outside from the winding head (6) at the region where the opening (1 1 ) is located.
  • one or more than one recess (G) is disposed on the compressor block (7) to decrease the material weight as in the prior embodiments, since the opening (1 1 ) is aligned with the recess (G) on the compressor block (7), there is no risk of the compressor block (7) to contact the winding head (6) at the region where the opening (1 1 ) is located.
  • the insulating element (10) is easily mounted onto the winding head (6) by means of the ring shape thereof having almost the same dimensions with winding head (6) and provides insulation between the compressor block (7) and the winding head (6) by covering the winding head (6) like a sleeve.
  • the hermetic compressor (1) of the present invention no binding cord holding the windings (4) together is required on the winding head (6), savings of binding cord material and of seam labor are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

The present invention relates to a hermetic compressor (1) suitable for being used in cooling devices such as refrigerators comprising a casing (2), a stator (5) located in the casing (2), having a stator stack (3) composed of laminations and one or more than one winding (4) composed of conducting wires wound on the slots on the stator stack (3), a winding head (6) forming the portion of the stator stack (3) extending towards outside from the opposite faces thereof, a compressor block (7) carrying basic mechanical elements such as cylinder, piston, crank and piston rod, seated on the upper side of the stator stack (3) such that the lower surface thereof does not contact the upper side of the winding head (6) and an insulating element (10) produced from plastic and providing insulation between the winding head (6) and the compressor block (7).

Description

Description
A HERMETIC COMPRESSOR COMPRISING AN INSULATING ELEMENT
[0001] The present invention relates to a hermetic compressor comprising an insulating element placed on the stator windings.
[0002] The stator of the hermetic compressor motor used in cooling devices such as refrigerators, is produced by placing windings composed of conducting wires into the slots on the stator stack composed of magnetic sheets and the windings form the parts referred to as winding head by extending towards the outside through the opposite faces of the stator stack.
Moreover, in the hermetic compressor a metal compressor block placed on the stator and the compressor block carries basic mechanical elements such as cylinder, piston, crank and piston rod. The compressor block is seated onto the stator stack such as to be over the winding head. A gap of minimum 2 mm has to be left between the compressor block and the winding head for security reasons such that no current jump (electric leakage) between the winding wires and the block occur when current is applied to the stator windings. In order to create the said gap, stator windings are pressed in special presses to be formed. In most situations, the number of stator windings requires to be increased for positive contribution to compressor motor efficiency; however the safety gap required to be left between the compressor block and the windings prevents the number of windings from being increased. In order to solve this problem, in the state of the art, insulating elements produced from thin isolative plastic film having a thickness of 0.15-0.20 mm are placed between the stator winding head and the compressor block, however placing these insulating elements into the compressor motor creates problems especially in terms of labor due to the shape of the winding head and the compressor block.
[0003] In International Patent Application No. WO2008145760, an insulating
element placed between the coil core and the winding head is explained. The insulating element comprises a peripheral edge region seating onto the coil core and additional insulating extensions providing insulation between the flange extensions of the cylinder housing and the winding head.
[0004] In United States Patent No. US5957671 , a film is explained which is used in the stator of the electric motor of a compressor, which provides insulation between the winding head and the compressor block, which is mounted onto the bearing part in the center of the compressor block by means of an opening situated in the middle thereof by being pushed.
[0005] The aim of the present invention is the realization of a hermetic
compressor comprising an insulating element easily mountable placed onto the stator windings.
[0006] The hermetic compressor realized in order to attain the aim of the present invention, and explicated in the first claim and the respective claims thereof comprises a stator having the stator stack to which the windings composed of conducting wires are placed, a winding head composing the portion of the windings extending towards outside from the upper surface of the stator stack and a compressor block seated on the upper surface of the stator stack and a ring shaped (toroidal) insulating element produced from plastic and mounted onto the winding head.
[0007] The vertical cross-section of the insulating element having toroidal body is in downward facing C shape, the insulating element has a housing placed therein and into which the winding head is placed.
[0008] In an embodiment of the present invention, the insulating element is
produced from heat shrink material. In this embodiment the insulating element shrinks by being heated after being mounted onto the winding head, adheres onto the winding head and a permanent connection is obtained by taking the shape of the winding head.
[0009] In another embodiment of the present invention, the insulating element has an opening formed by cutting out a portion of the ring-shaped body and enables the electrical connections of the winding heads extending towards outside from the winding head. Since the opening is located in alignment with the recess on the compressor block, there is no risk of the winding head contacting the compressor block at the region where the opening is located.
[0010] The insulating element is fitted to the winding head, is easily mounted onto the winding head due to its ring shape surrounding the winding head like a sleeve and provides insulation by covering the winding head. No binding cord holding the windings together is required on the winding head on which the insulating element is used.
[001 1] The hermetic compressor realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
[0012] Figure 1 - is the cross sectional view of a hermetic compressor.
[0013] Figure 2 - is the perspective view of a compressor block.
[0014] Figure 3 - is the perspective view of an insulating element.
[0015] Figure 4 - is the perspective view of a stator.
[0016] Figure 5 - is the perspective view of a stator on which an insulating
element is mounted.
[0017] The elements illustrated in the figures are numbered as follows:
1. Hermetic compressor
2. Casing
3. Stator stack
4. Winding
5. Stator
6. Winding head
7. Compressor block
8. Body
9. Housing
10. Insulating element
1 1. Opening
The hermetic compressor (1) suitable for being used in cooling devices such as refrigerators comprises a casing (2), a stator (5) located in the casing (2), having a stator stack (3) composed of laminations and one or more than one winding (4) composed of conducting wires wound on the slots on the stator stack (3), more than one winding head (6) forming the portions of the windings (4) extending towards outside from the opposite faces of the stator stack (3) and a compressor block (7) carrying and/or bearing basic mechanical elements such as cylinder, piston, crank and piston rod, mounted onto the upper side of the stator stack (3) such that the lower surface thereof does not contact the upper side of the winding head (6).
[0019] The hermetic compressor (1) of the present invention comprises a
ring-shaped (toroidal) insulating element (10) produced from plastic material, mounted onto the winding head (6) and surrounding the winding head (6) like a sleeve.
[0020] The insulating element (10) has a body (8) the vertical cross-section of which is in downward facing C shape and a housing (9) located in the body (8) and into which the winding head (6) is placed.
[0021] The housing (9) is enlarged by stretching the arms of the body (8) forming the C-shape such as to move away from each other to mount the insulating element (10) to the winding head (6) and the insulating element (10) is mounted onto the winding head (6) by being pushed in the axial direction by means of an easy manual labor.
[0022] In an embodiment of the present invention, the insulating element (10) is produced from heat shrink material.
[0023] In this embodiment, after the insulating element (10) is mounted to the winding head (6), the stator (5) is placed into an oven the temperature of which is adjusted for this operation and the insulating element (10) is heated. The insulating element (10) adheres to the windings (4) by shrinking due to heat and takes the shape of the winding head (6), a permanent connection is obtained.
[0024] In an embodiment of the present invention, the insulating element (10) comprises an opening (1 1 ) formed by cutting out a portion of the body (8) and when the insulating element (10) is mounted to the winding head (6), which enables the electrical connections of the winding (4) ends extending towards outside from the winding head (6) by being aligned with the portion where the electrical connections of the winding (4) ends are made.
[0025] In this embodiment, the insulating element (10) does not cover the winding head (6) at the region where the opening (1 1 ) is located. The electrical connections are made by extending the winding (4) ends towards outside from the winding head (6) at the region where the opening (1 1 ) is located. Furthermore, one or more than one recess (G) is disposed on the compressor block (7) to decrease the material weight as in the prior embodiments, since the opening (1 1 ) is aligned with the recess (G) on the compressor block (7), there is no risk of the compressor block (7) to contact the winding head (6) at the region where the opening (1 1 ) is located.
[0026] The insulating element (10) is easily mounted onto the winding head (6) by means of the ring shape thereof having almost the same dimensions with winding head (6) and provides insulation between the compressor block (7) and the winding head (6) by covering the winding head (6) like a sleeve. In the hermetic compressor (1) of the present invention, no binding cord holding the windings (4) together is required on the winding head (6), savings of binding cord material and of seam labor are provided.
[0027] It is to be understood that the present invention is not limited by the
embodiments disclosed above and a person skilled in the art can easily introduce different embodiments. These should be considered within the scope of the protection postulated by the claims of the present invention.

Claims

Claims
1. A hermetic compressor (1 ) comprising a casing (2), a stator (5) located in the casing (2), having a stator stack (3) composed of laminations and one or more than one winding (4) composed of conducting wires wound on the slots on the stator stack (3), more than one winding head (6) forming the portions of the windings (4) extending towards outside from the opposite faces of the stator stack (3) and a compressor block (7) mounted onto the upper surface of the stator stack (3), characterized by a ring-shaped (toroidal) insulating element (10) produced from plastic material, mounted onto the winding head (6) and surrounding the winding head (6) like a sleeve.
2. A hermetic compressor (1 ) as in Claim 1 , characterized by the insulating
element (10) having a body (8) the vertical cross-section of which is in downward facing C shape and a housing (9) located in the body (8) and into which the winding head (6) is placed.
3. A hermetic compressor (1 ) as in Claim 1 or 2, characterized by the insulating element (10) produced from heat shrink material.
4. A hermetic compressor (1 ) as in any one of the claims above, characterized by the insulating element (10) comprising an opening (1 1 ) formed by cutting out a portion of the body (8) and enabling the electrical connections of the winding (4) ends extending towards outside from the winding head (6).
5. A hermetic compressor (1 ) as in Claim 4, characterized by the insulating
element (10) comprising the opening (1 1 ) aligned with the recess (G) on the compressor block (7).
EP10795326A 2009-12-23 2010-12-16 A hermetic compressor comprising an insulating element Withdrawn EP2517337A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200909706 2009-12-23
PCT/EP2010/069845 WO2011076651A1 (en) 2009-12-23 2010-12-16 A hermetic compressor comprising an insulating element

Publications (1)

Publication Number Publication Date
EP2517337A1 true EP2517337A1 (en) 2012-10-31

Family

ID=43836803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10795326A Withdrawn EP2517337A1 (en) 2009-12-23 2010-12-16 A hermetic compressor comprising an insulating element

Country Status (3)

Country Link
EP (1) EP2517337A1 (en)
CN (1) CN102725942B (en)
WO (1) WO2011076651A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020188640A (en) * 2019-05-17 2020-11-19 パナソニックＩｐマネジメント株式会社 Refrigeration cycle device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2002969A (en) * 1977-08-16 1979-02-28 Danfoss As Electrical connector for the stator winding of an electric motor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972957A (en) * 1982-10-18 1984-04-25 Sanyo Electric Co Ltd Coil end insulating paper for compressor
DE19516811C2 (en) 1995-05-08 1998-04-09 Danfoss Compressors Gmbh Refrigerant compressor
JP2002272047A (en) * 2001-03-14 2002-09-20 Matsushita Electric Ind Co Ltd Motor and manufacturing method thereof, and compressor using these
AT10411U1 (en) * 2007-05-31 2009-02-15 Acc Austria Gmbh REFRIGERANT COMPRESSOR
JP3138162U (en) * 2007-10-11 2007-12-20 株式会社シマノ Bicycle power generation hub

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2002969A (en) * 1977-08-16 1979-02-28 Danfoss As Electrical connector for the stator winding of an electric motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011076651A1 *

Also Published As

Publication number Publication date
CN102725942B (en) 2016-01-13
CN102725942A (en) 2012-10-10
WO2011076651A1 (en) 2011-06-30

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