EP1723337A1 - A compressor - Google Patents

A compressor

Info

Publication number
EP1723337A1
EP1723337A1 EP05702932A EP05702932A EP1723337A1 EP 1723337 A1 EP1723337 A1 EP 1723337A1 EP 05702932 A EP05702932 A EP 05702932A EP 05702932 A EP05702932 A EP 05702932A EP 1723337 A1 EP1723337 A1 EP 1723337A1
Authority
EP
European Patent Office
Prior art keywords
channel
crank
oil
channels
compressor
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.)
Granted
Application number
EP05702932A
Other languages
German (de)
French (fr)
Other versions
EP1723337B1 (en
Inventor
Tolga Arcelik Anonim Sirketi YAROGLU
Sitki Arcelik Anonim Sirketi BICER
Tolga Arcelik Anonim Sirketi GUNGOR
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
Priority to SI200530712T priority Critical patent/SI1723337T1/en
Publication of EP1723337A1 publication Critical patent/EP1723337A1/en
Application granted granted Critical
Publication of EP1723337B1 publication Critical patent/EP1723337B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • F04B39/0253—Hermetic compressors with oil distribution channels in the rotating shaft using centrifugal force for transporting the oil

Definitions

  • This invention relates to a compressor, preferably used in refrigerators, wherein the lubrication of the movable parts is improved.
  • lubrication is necessary for the movable parts of the compressor not to be affected by friction forces and, for heat to be discharged.
  • the lubrication of the bearings is achieved usually by rotation of the crank at high revolutions.
  • the lubrication is performed by sucking the lubricant oil inside the compressor casing via an oil suction pipe at the lower portion of the crank and by conducting it to the movable/heated parts.
  • the aim of the present invention is the realization of a compressor wherein, in different operating conditions, the lubrication of the movable parts is improved.
  • Fig.l - is a schematic representation of a compressor.
  • Fig.2 - is a schematic representation of a crank comprising more than one channel with different helix angles.
  • Fig.3 - is a schematic representation of a crank comprising more than one channel with the same helix angle.
  • Fig.4 - is a schematic representation of a crank comprising two helix channels meeting at a junction.
  • the compressor (1) comprises a motor (15), a lower casing (2) that carries the parts inside the said compressor (1), an upper casing (9) above the lower casing (2), a cylinder (3) between the lower (2) and upper casing (9), which is utilized to pump the refrigerant gas inside, a cylinder head (8) on the cylinder (3) the head of which provides the circulation of the gas sucked and pumped, a piston (4) whereby the refrigerant gas is compressed in the cylinder hole, a crank (5) which transmits the motion obtained from the motor (15), a connecting rod (6) which transmits the motion obtained from the crank (5) to the piston (4), a piston pin (7) that connects the piston(4) and the connecting rod (6), a balance weight (11) used to diminish the negative effect of eccentricities of gravitational centers of the components such as the crank (5), the connecting rod (6) and the piston (4) with respect to the rotation axis of the crank (5), a throwing pipe (13) fixed to the rotation axis of the crank (5) at an angle,
  • the compressor (1) contains a preferably liquid fluid, which facilitates the motion of the operating parts and transfers the heat generated inside.
  • oil is utilized as the liquid fluid.
  • the crank (5) comprises an oil suction pipe (12) whereby the oil inside the lower casing (2) is conducted to the interior of the crank (5) by suction, an oil transfer pipe (20) transferring the oil to the throwing pipe (13) and to the upper portions of the crank (5), more than one channel (17), preferably in helical form, located at the outer surface, which are connected to each other at some point and wherein the oil proceeds upwards on the surface as a result of rotary motion, at least one channel inlet opening (18) for each channel (17) whereby the oil sucked from the oil suction pipe (12) is transferred to the channel (17), a channel outlet opening (16) which ensures that at least two of the channels (17) communicate with each other and with the oil transfer pipe (20) and that the oil is transferred to the inside of it and, a junction (19) where several channels (17) meet.
  • the crank (5) which transmits the rotary motion of the motor (15) to the piston (4) as linear motion by utilizing a connecting rod (6) mechanism, is a tight fit to the rotor and thus rotates as a consequence of the rotation of the rotor.
  • the oil suction pipe (12) which preferably is a tight fit to the crank (5), provides the suction of the oil inside the lower casing (2) via the forces created as it rotates with the crank (5). Through the forces created during the rotation of the crank (5), it is achieved that the oil sticks to the surface of the crank (5) and thereby that an oil film (A) is formed in the crank (5).
  • the oil sucked by the oil suction pipe (12) reaches the channel inlet opening (18) by passing through the crank (5) and diffuses through the channel inlet opening (18) into the channel (17).
  • the oil that moves inside the channel (17) leaves the channel (17) through the channel outlet opening (16) and enters the oil transfer pipe (20) wherein it reaches the throwing pipe (13) that flings it into the compressor (1).
  • the crank (5) comprises two channel inlet openings (18) positioned approximately at the same distance to the inlet opening of the oil suction pipe (12), two channels (17), in the direction of the rotary motion of the crank (5), with different helix angles ( ⁇ , ⁇ ) and, communicating with each of the two channel inlet openings (18) and, a channel outlet opening (16) where the channels (17) meet and at the same time communicate with the oil transfer pipe (20); ( Figure 2).
  • the crank (5) comprises two channel inlet openings (18) positioned approximately at the same distance to the inlet opening of the oil suction pipe (12), two channels (17), in the direction of the rotary motion of the crank (5), with the same helix angle ( ⁇ ) and, communicating with each of the two channel inlet openings (18), another channel (17) with a different helix angle ( ⁇ ) from the helix angle ( ⁇ ) of the afore-mentioned channels (17) and a channel outlet opening (16) where this other channel (17) is connected to; ( Figure 3).
  • the crank (5) comprises two channel inlet openings (18) positioned at the same or a different distance to the inlet opening of the oil suction pipe (12), two channels (17) with different helix angles ( ⁇ , ⁇ ) communicating with the channel inlet openings (18), a junction (19) where the said channels (17) meet and, a channel (17) that connects the junction (19) to the channel outlet opening (16); ( Figure 4).
  • the channels (17) and the channel inlet opening (18) ensure that more amount of oil is transferred to the upper portions of the crank (5) and, by utilizing a throwing pipe (13), to the other movable parts. Moreover, by means of the channels (17) and the channel inlet openings (18) it is achieved that the hard-to-reach, movable and heated components are lubricated more easily.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

This invention relates to a compressor (1), preferably used in refrigerators, which comprises a crank (5) incorporating channels (17) whereby the lubrication is improved.

Description

Description A COMPRESSOR
[001] This invention relates to a compressor, preferably used in refrigerators, wherein the lubrication of the movable parts is improved.
[002] In compressors, preferably used in refrigerators, lubrication is necessary for the movable parts of the compressor not to be affected by friction forces and, for heat to be discharged. In compressors, the lubrication of the bearings is achieved usually by rotation of the crank at high revolutions. The lubrication is performed by sucking the lubricant oil inside the compressor casing via an oil suction pipe at the lower portion of the crank and by conducting it to the movable/heated parts. Although a lubrication process performed by utilizing several channels located on the crank improves the lubrication efficiency, lubrication problems are encountered particularly in variable speed compressors at low revolutions.
[003] In one of the applications in the current state of the art, in the United States Patent Document US 2766929, a description is given of a crank wherein the oil sucked from the inside of the said crank is conducted to upper bearings via a helix channel formed in the main bearing.
[004] In another application in the current state of the art, in the United States Patent Document US 6416296, a description is given of a channel formed to increase the oil film thickness at the section around the lower oil hole on the crank.
[005] In another application in the current state of the art, in the United States Patent Document US 4236879, a description is given of a compressor wherein lubrication can be performed in different line and directions by utilizing more than one oil passage bores and channels.
[006] The aim of the present invention is the realization of a compressor wherein, in different operating conditions, the lubrication of the movable parts is improved.
[007] The compressor designed to fulfill the objectives of the present invention is illustrated in the attached figures where:
[008] Fig.l - is a schematic representation of a compressor.
[009] Fig.2 - is a schematic representation of a crank comprising more than one channel with different helix angles.
[010] Fig.3 - is a schematic representation of a crank comprising more than one channel with the same helix angle.
[011] Fig.4 - is a schematic representation of a crank comprising two helix channels meeting at a junction.
[012] Elements shown in figures are numbered as follows: 1. Compressor 2. Lower casing 3. Cylinder 4. Piston 5. Crank 6. Connecting rod 7. Piston pin 8. Cylinder head 9. Upper casing 10. Suction muffler 11. Balance weight 12. Oil suction pipe 13. Throwing pipe 14. Guiding member 15. Motor 16. Channel outlet opening 17. Channel 18. Channel inlet opening 19. Junction 20. Oil transfer pipe
[013] In household appliances, preferably in cooling devices, the circulation of the refrigerant used to realize the cooling, is achieved by means of a compressor (1).
[014] The compressor (1) comprises a motor (15), a lower casing (2) that carries the parts inside the said compressor (1), an upper casing (9) above the lower casing (2), a cylinder (3) between the lower (2) and upper casing (9), which is utilized to pump the refrigerant gas inside, a cylinder head (8) on the cylinder (3) the head of which provides the circulation of the gas sucked and pumped, a piston (4) whereby the refrigerant gas is compressed in the cylinder hole, a crank (5) which transmits the motion obtained from the motor (15), a connecting rod (6) which transmits the motion obtained from the crank (5) to the piston (4), a piston pin (7) that connects the piston(4) and the connecting rod (6), a balance weight (11) used to diminish the negative effect of eccentricities of gravitational centers of the components such as the crank (5), the connecting rod (6) and the piston (4) with respect to the rotation axis of the crank (5), a throwing pipe (13) fixed to the rotation axis of the crank (5) at an angle, wherein the oil that comes from the crank (5) and lubricates the bearings is flung to the upper casing (9) by the rotation of the said pipe together with the crank (5), a guiding member (14) which ensures that the oil flung by the throwing pipe (13) does not reach the cylinder block and obstruct mixing with the refrigerant but is routed onto the connecting rod (6), piston (4) and piston pin (7) and a suction muffler (10) preferably made of plastic material whereby the refrigerant gas reaches the cylinder block without being heated and the noise that might be generated by the refrigerant gas is prevented.
[015] The compressor (1) contains a preferably liquid fluid, which facilitates the motion of the operating parts and transfers the heat generated inside. In the preferred embodiment of the present invention, oil is utilized as the liquid fluid.
[016] The crank (5) comprises an oil suction pipe (12) whereby the oil inside the lower casing (2) is conducted to the interior of the crank (5) by suction, an oil transfer pipe (20) transferring the oil to the throwing pipe (13) and to the upper portions of the crank (5), more than one channel (17), preferably in helical form, located at the outer surface, which are connected to each other at some point and wherein the oil proceeds upwards on the surface as a result of rotary motion, at least one channel inlet opening (18) for each channel (17) whereby the oil sucked from the oil suction pipe (12) is transferred to the channel (17), a channel outlet opening (16) which ensures that at least two of the channels (17) communicate with each other and with the oil transfer pipe (20) and that the oil is transferred to the inside of it and, a junction (19) where several channels (17) meet.
[017] The crank (5), which transmits the rotary motion of the motor (15) to the piston (4) as linear motion by utilizing a connecting rod (6) mechanism, is a tight fit to the rotor and thus rotates as a consequence of the rotation of the rotor. The oil suction pipe (12) which preferably is a tight fit to the crank (5), provides the suction of the oil inside the lower casing (2) via the forces created as it rotates with the crank (5). Through the forces created during the rotation of the crank (5), it is achieved that the oil sticks to the surface of the crank (5) and thereby that an oil film (A) is formed in the crank (5). The thickness of the said oil film (A) at the level of the channel inlet opening (18), affects the amount of the oil transferred to the upper bearings and the starting of the lubrication at low revolutions. The oil sucked by the oil suction pipe (12) reaches the channel inlet opening (18) by passing through the crank (5) and diffuses through the channel inlet opening (18) into the channel (17). The oil that moves inside the channel (17) leaves the channel (17) through the channel outlet opening (16) and enters the oil transfer pipe (20) wherein it reaches the throwing pipe (13) that flings it into the compressor (1). In this way, it is achieved that the movable parts inside the compressor (1) are lubricated and thus, that the motion of the parts is facilitated as a result of the reduced friction and additionally, that the heat generated during the motion is transferred to the upper casing (9) via the oil that is flung to the said casing and consequently is discharged to the outside.
[018] In one embodiment of the present invention, the crank (5) comprises two channel inlet openings (18) positioned approximately at the same distance to the inlet opening of the oil suction pipe (12), two channels (17), in the direction of the rotary motion of the crank (5), with different helix angles (α, β) and, communicating with each of the two channel inlet openings (18) and, a channel outlet opening (16) where the channels (17) meet and at the same time communicate with the oil transfer pipe (20); (Figure 2).
[019] In another embodiment of the present invention, the crank (5) comprises two channel inlet openings (18) positioned approximately at the same distance to the inlet opening of the oil suction pipe (12), two channels (17), in the direction of the rotary motion of the crank (5), with the same helix angle (Φ) and, communicating with each of the two channel inlet openings (18), another channel (17) with a different helix angle (θ) from the helix angle (Φ) of the afore-mentioned channels (17) and a channel outlet opening (16) where this other channel (17) is connected to; (Figure 3).
[020] In another embodiment of the present invention, the crank (5) comprises two channel inlet openings (18) positioned at the same or a different distance to the inlet opening of the oil suction pipe (12), two channels (17) with different helix angles (α, β) communicating with the channel inlet openings (18), a junction (19) where the said channels (17) meet and, a channel (17) that connects the junction (19) to the channel outlet opening (16); (Figure 4).
[021] The channels (17) and the channel inlet opening (18) ensure that more amount of oil is transferred to the upper portions of the crank (5) and, by utilizing a throwing pipe (13), to the other movable parts. Moreover, by means of the channels (17) and the channel inlet openings (18) it is achieved that the hard-to-reach, movable and heated components are lubricated more easily.
[022] By the embodiment in accordance with the present invention, it is accomplished that more amount of oil sucked from the oil film (A) in the crank (5) and that the lubrication can be performed at lower revolutions. Particularly in variable revolution compressors (1), proper operating is ensured at different revolutions. Furthermore, the oil flow rate is increased as a consequence of the improvement of the lubrication system according to the present invention and thereby, in addition to the ease of the motion obtained; extra means are provided to assist the discharge of the heat inside the compressor (1) to the surroundings. As a result of the discharge of the heat inside the compressor (1), the temperature of the inlet opening is decreased wherein, thermody- namically; the volumetric efficiency of the compressor (1) is increased.

Claims

Claims
[001] A compressor (1) used in household appliances, preferably in refrigerators that comprises; a motor (15); and a crank (5), which transmits the motion obtained from the motor (15) and characterized by a crank (5) comprising; an oil suction pipe (12) whereby the oil is conducted to the interior of the crank (5) by suction so that the movable parts and the bearings that the said parts contact with while moving are lubricated during operating; an oil transfer pipe (20) transferring the oil to the upper portions of the crank (5); more than one channel (17) located at the outer surface, which are connected to each other at some point and wherein the oil proceeds upwards on the surface as a result of rotary motion; at least one channel inlet opening (18) for each channel (17) whereby the oil sucked from the oil suction pipe (12) is transferred to the channel (17); a junction (19) where at least two channels (17) meet and; a channel outlet opening (16) which communicate with the oil transfer pipe (20) and ensures that the oil is transferred from of channel (17) to the inside of it .
[002] A compressor (1) as described in Claim 1, characterized by a junction (19) and a channel outlet opening (16) whereby the channels (17) directly communicate with the oil transfer pipe (20) at their intersection point.
[003] A compressor (1) as described in Claims 1 or 2, characterized by a crank (5) comprising at least two channels (17), in the direction of the rotary motion of the crank (5), with different helix angles (α, β) and, communicating with each of the two channel inlet openings (18) positioned approximately at the same distance to the inlet opening of the oil suction pipe (12) and also communicating with each other and with the oil transfer pipe (20) at channel outlet opening (16).
[004] A compressor (1) as described in Claims 1 or 2, characterized by a crank (5) comprising two channels (17), in the direction of the rotary motion of the crank (5), with the same helix angle (Φ) and, communicating with each of the two channel inlet openings (18) positioned approximately at the same distance to the inlet opening of the oil suction pipe (12), another channel (17) with a different helix angle (θ) from the helix angle (Φ) of the afore-mentioned channels (17) and at least two channels (17) which connect this other channel (17) to the channel outlet opening (16).
[005] A compressor (1) as described in Claim 2, characterized by a crank (5) comprising at least two channels (17) in the direction of the rotary motion of the crank (5), with different helix angles ( , β), communicating with each of the two channel inlet openings (18) positioned at the same and/or a different distance to the inlet opening of the oil suction pipe (12) and, which reach the channel outlet opening (16) as one channel (17) after meeting at a junction (19).
EP05702932A 2004-02-11 2005-02-09 A compressor Active EP1723337B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200530712T SI1723337T1 (en) 2004-02-11 2005-02-09 A compressor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200400229 2004-02-11
PCT/IB2005/050512 WO2005078282A1 (en) 2004-02-11 2005-02-09 A compressor

Publications (2)

Publication Number Publication Date
EP1723337A1 true EP1723337A1 (en) 2006-11-22
EP1723337B1 EP1723337B1 (en) 2009-05-06

Family

ID=34859438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05702932A Active EP1723337B1 (en) 2004-02-11 2005-02-09 A compressor

Country Status (8)

Country Link
EP (1) EP1723337B1 (en)
AT (1) ATE430879T1 (en)
DE (1) DE602005014344D1 (en)
DK (1) DK1723337T3 (en)
ES (1) ES2324047T3 (en)
SI (1) SI1723337T1 (en)
TR (1) TR200604208T1 (en)
WO (1) WO2005078282A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53130507A (en) * 1977-04-20 1978-11-14 Hitachi Ltd Totally-enclosed motor compressor
JPS5825594A (en) * 1982-07-21 1983-02-15 Hitachi Ltd Rotary shaft for totally-closed motor compressor
KR0153343B1 (en) * 1995-10-13 1999-03-20 김광호 Reciprocating compressor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005078282A1 *

Also Published As

Publication number Publication date
EP1723337B1 (en) 2009-05-06
SI1723337T1 (en) 2009-10-31
DE602005014344D1 (en) 2009-06-18
ES2324047T3 (en) 2009-07-29
WO2005078282A1 (en) 2005-08-25
ATE430879T1 (en) 2009-05-15
DK1723337T3 (en) 2009-08-31
TR200604208T1 (en) 2007-01-22

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