EP1680599A1 - A compressor - Google Patents

A compressor

Info

Publication number
EP1680599A1
EP1680599A1 EP04744699A EP04744699A EP1680599A1 EP 1680599 A1 EP1680599 A1 EP 1680599A1 EP 04744699 A EP04744699 A EP 04744699A EP 04744699 A EP04744699 A EP 04744699A EP 1680599 A1 EP1680599 A1 EP 1680599A1
Authority
EP
European Patent Office
Prior art keywords
outlet orifice
protrusion
gas
cylinder
central axis
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
EP04744699A
Other languages
German (de)
French (fr)
Other versions
EP1680599B1 (en
Inventor
Serkan Kara
Sitki Bicer
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 EP1680599A1 publication Critical patent/EP1680599A1/en
Application granted granted Critical
Publication of EP1680599B1 publication Critical patent/EP1680599B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F04B39/0005—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 adaptations of pistons

Definitions

  • This invention relates to a compressor, preferably used in the refrigerators, having an improved gas flow performance in the cylinder during the pumping of the cooling gas into the system.
  • a piston is used for the suction of the cooling gas and pumping it in to the system and a cylinder into which a piston is placed.
  • One of the criteria for the efficient operation of the compressor is related to which rate of the discharge taking the gas in the cylinder in one cycle. When the piston compresses the gas, some amount of the gas in the gap formed by the outlet nozzle is not discharged thereby causing the decrease in the efficiency of the compressor.
  • French Patent No. 2617242 discloses a pin on the piston that fits in the outlet orifice during the compression of the gas and reduces the unused volume.
  • Pin and outlet orifice may have either cylindrical or frusto-conical form having conformable sizes for each other. Since the flow area where the gas is discharged narrows and pin covers the whole of outlet orifice when the pin fits into the outlet orifice, discharge of the gas is got difficult and increasing the losses are caused due to the turbulences. The advantage gained by the reduction in the unused volume is lost by the impediment in the flow.
  • American Patent 5816783 defines a pin and an outlet orifice on the piston having a frusto-conical structure. As the slope of the pin is smaller than the slope of the side wall of the outlet orifice, narrowing in the flow area is partially reduced when the pin is fitted into the outlet orifice.
  • European Patent 0823022 defines a pin and an outlet orifice on the piston having an asymmetrical structure. The flow is partially improved by the pin formed asymmetrically according to the direction of the flow.
  • the object of this invention is to provide a compressor, preferably used in the refrigerators, having an improved gas flow performance during pumping the cooling gas into the system.
  • Figure 1 is a cross sectional view of a compressor.
  • Figure 2 is a schematic cross sectional view of a valve table, a cylinder and a piston having a pin in the position when the pin is fitted into the outlet orifice.
  • Figure 3 is a schematic cross sectional view of a valve table, a cylinder and a piston having a pin in the position before the pin is fitted into the outlet orifice.
  • Figure 4 is a top schematic view of a valve table, a cylinder and a piston having a pin in the position when the pin is fitted into the outlet orifice.
  • the components shown in the drawings have been enumerated as follows: 1. Compressor 2. Lower housing 3. Cylmder 4. Piston 5. Crankshaft 6. Connecting Rod 7. Piston Pin 8. Cylinder head 9. Upper housing 10. Suction muffler 11. Valve table 12. Gasket 13. Outlet orifice 14. Outlet valve 15. Protrusion 16. Piston pressure surface 17. Cylmder inner wall
  • the circulation of the fluid of the cycle which is used for cooling in the household appliances preferably in the refrigerators is provided by the hermetic compressor (1) with piston.
  • cooling gas is used as the fluid of the cycle.
  • the compressor (1) comprises a lower housing (2) which carries the components inside, an upper housing (9) on the lower housing (2), a cylinder (3) placed in the lower housing (2) and upper housing (9) to provide the pumping of the cooling gas inside, a cylinder head (8) on the cylinder (3) which circulates the sucked and compressed cooling gas, a valve table (11) onto which a cylinder head (8) is placed, a piston (4) which is provided to compress the cooling gas into the cylinder orifice, a gasket (12) which is placed between the cylinder (3) and the valve table (11) to prevent the direct strike of the piston (4) with the valve table (11), a crank (5) which transfers the motion from the motor, a connecting rod (6) which converts the circular motion of the crank (5) into the linear motion and transfers it to the piston (4), a piston pin (7) which connects the connecting rod (6) to the piston (4) and a suction muffler (10) preferably made of plastic material, which provides to reach that is not heating and prevents the noise which may be caused
  • Valve table (11) comprises an outlet orifice (13) in which the cooling gas that is taking into the cylinder (3) is discharged and an outlet cover (14) which covers the outlet orifice (13) and prevents the discharge of the cooling gas in the cylinder (3) to outside during the suction process.
  • Piston (4) comprises a protrusion (15) which fits into the outlet orifice (13) and reduces the unused volume formed during the compression process and a piston pressure surface (16) which fits onto the gasket (12).
  • Cylinder (3) comprises a cylinder inner wall (17) on which the piston (4) moves.
  • central axis (cl) of the protrusion (15) and the central axis (c2) of the outlet orifice (13) should not coincide with each other when the protrusion (15) fits into the outlet orifice (13).
  • the width (dl) of the higher flow region of the gas which is close to the central axis (c3) of the cylinder (3) is greater than the width (d2) of the lower flow region of the gas which is close to cylinder inner wall (17). It is preferably 5/2d2 > dl > 3/2d2.
  • the protrusion (15) and the outlet orifice (13) have a frusto-conical form.
  • the angle (#1) between the side wall of the protrusion (15) and the piston pressure surface (16) is almost equal to the angle (#2) between the side wall of the outlet orifice (13) and the piston pressure surface (16).
  • the base diameter (rl) of the protrusion (15) is lower than the base diameter (r2) of the outlet orifice (13).
  • the rate of rl/r2 is preferably lower than 5/6 and greater than 3/6 to protect the balance between the gas flow performance and cooling capacity amount and provide the optimization.

Landscapes

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

Abstract

This invention relates to a compressor (1), preferably used in the refrigerators, having an improved gas flow performance in the cylinder (3) during the pumping of the cooling gas into the system.

Description

Description A COMPRESSOR
[001] This invention relates to a compressor, preferably used in the refrigerators, having an improved gas flow performance in the cylinder during the pumping of the cooling gas into the system.
[002] In hermetic compressors which are preferably used in the refrigerators a piston is used for the suction of the cooling gas and pumping it in to the system and a cylinder into which a piston is placed. There are gas suction and outlet orifices on the cylinder. Piston moves back in the cylinder during the gas suction process thereby taking the gas from the suction orifice into the cylmder and it moves forward in the cylinder thereby compressing the gas and discharging the gas out of the cylinder through the outlet orifice. One of the criteria for the efficient operation of the compressor is related to which rate of the discharge taking the gas in the cylinder in one cycle. When the piston compresses the gas, some amount of the gas in the gap formed by the outlet nozzle is not discharged thereby causing the decrease in the efficiency of the compressor.
[003] In state of the art, French Patent No. 2617242 discloses a pin on the piston that fits in the outlet orifice during the compression of the gas and reduces the unused volume. Pin and outlet orifice may have either cylindrical or frusto-conical form having conformable sizes for each other. Since the flow area where the gas is discharged narrows and pin covers the whole of outlet orifice when the pin fits into the outlet orifice, discharge of the gas is got difficult and increasing the losses are caused due to the turbulences. The advantage gained by the reduction in the unused volume is lost by the impediment in the flow.
[004] In state of the art, American Patent 5816783 defines a pin and an outlet orifice on the piston having a frusto-conical structure. As the slope of the pin is smaller than the slope of the side wall of the outlet orifice, narrowing in the flow area is partially reduced when the pin is fitted into the outlet orifice.
[005] In state of the art, European Patent 0823022 defines a pin and an outlet orifice on the piston having an asymmetrical structure. The flow is partially improved by the pin formed asymmetrically according to the direction of the flow.
[006] The object of this invention is to provide a compressor, preferably used in the refrigerators, having an improved gas flow performance during pumping the cooling gas into the system.
[007] The compressor realized in order to attain the objects of the present invention has been illustrated in the drawings, wherein
[008] Figure 1 is a cross sectional view of a compressor.
[009] Figure 2 is a schematic cross sectional view of a valve table, a cylinder and a piston having a pin in the position when the pin is fitted into the outlet orifice.
[010] Figure 3 is a schematic cross sectional view of a valve table, a cylinder and a piston having a pin in the position before the pin is fitted into the outlet orifice. [Oil] Figure 4 is a top schematic view of a valve table, a cylinder and a piston having a pin in the position when the pin is fitted into the outlet orifice. [012] The components shown in the drawings have been enumerated as follows: 1. Compressor 2. Lower housing 3. Cylmder 4. Piston 5. Crankshaft 6. Connecting Rod 7. Piston Pin 8. Cylinder head 9. Upper housing 10. Suction muffler 11. Valve table 12. Gasket 13. Outlet orifice 14. Outlet valve 15. Protrusion 16. Piston pressure surface 17. Cylmder inner wall
[013] The circulation of the fluid of the cycle which is used for cooling in the household appliances preferably in the refrigerators is provided by the hermetic compressor (1) with piston. In a preferred embodiment, cooling gas is used as the fluid of the cycle.
[014] The compressor (1) comprises a lower housing (2) which carries the components inside, an upper housing (9) on the lower housing (2), a cylinder (3) placed in the lower housing (2) and upper housing (9) to provide the pumping of the cooling gas inside, a cylinder head (8) on the cylinder (3) which circulates the sucked and compressed cooling gas, a valve table (11) onto which a cylinder head (8) is placed, a piston (4) which is provided to compress the cooling gas into the cylinder orifice, a gasket (12) which is placed between the cylinder (3) and the valve table (11) to prevent the direct strike of the piston (4) with the valve table (11), a crank (5) which transfers the motion from the motor, a connecting rod (6) which converts the circular motion of the crank (5) into the linear motion and transfers it to the piston (4), a piston pin (7) which connects the connecting rod (6) to the piston (4) and a suction muffler (10) preferably made of plastic material, which provides to reach that is not heating and prevents the noise which may be caused by the cooling gas until it is transferred to the cylinder region.
[015] Valve table (11) comprises an outlet orifice (13) in which the cooling gas that is taking into the cylinder (3) is discharged and an outlet cover (14) which covers the outlet orifice (13) and prevents the discharge of the cooling gas in the cylinder (3) to outside during the suction process.
[016] Piston (4) comprises a protrusion (15) which fits into the outlet orifice (13) and reduces the unused volume formed during the compression process and a piston pressure surface (16) which fits onto the gasket (12).
[017] Cylinder (3) comprises a cylinder inner wall (17) on which the piston (4) moves.
[018] In order to improve the gas flow performance while reducing the unused volume, central axis (cl) of the protrusion (15) and the central axis (c2) of the outlet orifice (13) should not coincide with each other when the protrusion (15) fits into the outlet orifice (13). When the protrusion (15) fits into the outlet orifice (13) as a result of the eccentricity between the central axis (cl) of the protrusion (15) and the central axis (c2) of the outlet orifice (13), the width (dl) of the higher flow region of the gas which is close to the central axis (c3) of the cylinder (3) is greater than the width (d2) of the lower flow region of the gas which is close to cylinder inner wall (17). It is preferably 5/2d2 > dl > 3/2d2.
[019] The protrusion (15) and the outlet orifice (13) have a frusto-conical form. The angle (#1) between the side wall of the protrusion (15) and the piston pressure surface (16) is almost equal to the angle (#2) between the side wall of the outlet orifice (13) and the piston pressure surface (16).
[020] The base diameter (rl) of the protrusion (15) is lower than the base diameter (r2) of the outlet orifice (13). The rate of rl/r2 is preferably lower than 5/6 and greater than 3/6 to protect the balance between the gas flow performance and cooling capacity amount and provide the optimization.
[021] The gas flow performance is improved in the cylinder thanks to the production of the protrusion (15) and the outlet orifice (13) within the same form and eccentric position of the protrusion (15) to the outlet orifice (13).

Claims

Claims
[001] A compressor (1) comprising a cylinder (3) which provides the pumping of the cooling gas, a valve table (11) onto which an outlet orifice (13) is placed to discharge the cooling gas, a gasket (12) which is placed between the cylinder (3) and the valve table (11) to prevent their strike with each other and a piston (4) having a protrusion (15) fitting into the outlet orifice (13) and reduces the unused volume formed during the compression process and a piston pressure surface (16) fitting onto the gasket (12) provided to compress the cooling gas into the cylinder orifice characterized with a projection whose central axis (cl) does not eccentricity with the central axis (c2) of the outlet orifice (13) when it is fitted into the outlet orifice (13) as a result of its eccentric position to the outlet orifice (13) for the improvement of the gas flow performance while reducing the unused volume.
[002] A compressor (1) as defined in Claim 1 characterized with a protrusion (15) having a frusto-conical form and an angle (#1) with the piston pressure surface (16) which is almost equal to the angle (#2) between the sidewall of the outlet orifice (13) and the piston pressure surface (16).
[003] A compressor (1) as defined in any of the Claims above characterized with a protrusion (15) having a base diameter (rl) lower than the base diameter (r2) of the outlet orifice (13).
[004] A compressor (1) as defined in any of the Claims above characterized with a protrusion (15) having the rate of the a base diameter (rl) to the base diameter (r2) of the outlet orifice which is preferably lower than 5/6 and greater than 3/6 to protect the balance between the gas flow performance and cooling capacity amount and provide the optimization.
[005] A compressor (1) as defined in any of the Claims above characterized with a protrusion (15) having a width (dl) of the higher flow region of the gas, which is close to the central axis (c3) of the cylinder (3) greater than the width (d2) of the lower flow region of the gas which is close to cylinder inner wall (17) when the protrusion (15) fits into the outlet orifice (13) as a result of the leaking between the central axis (cl) of the protrusion (15) and the central axis (c2) of the outlet orifice (13).
[006] A compressor (1) as defined in any of the Claims above characterized with a protrusion (15) having a rate of width (dl) of the higher flow region of the gas which is close to the central axis (c3) of the cylmder (3) greater than 3/2 and lower than 5/2 with the width (d2) of the lower flow region of the gas which is close to cylinder inner wall (17) when the protrusion (15) fits into the outlet orifice (13) as a result of the leaking between the central axis (cl) of the protrusion (15) and the central axis (c2) of the outlet orifice (13).
EP04744699A 2003-07-31 2004-07-30 A compressor Expired - Lifetime EP1680599B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200301244 2003-07-31
PCT/IB2004/051347 WO2005010365A1 (en) 2003-07-31 2004-07-30 A compressor

Publications (2)

Publication Number Publication Date
EP1680599A1 true EP1680599A1 (en) 2006-07-19
EP1680599B1 EP1680599B1 (en) 2010-10-13

Family

ID=34102187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04744699A Expired - Lifetime EP1680599B1 (en) 2003-07-31 2004-07-30 A compressor

Country Status (6)

Country Link
EP (1) EP1680599B1 (en)
AT (1) ATE484678T1 (en)
DE (1) DE602004029601D1 (en)
ES (1) ES2351695T3 (en)
TR (1) TR200601184T1 (en)
WO (1) WO2005010365A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI2300715T1 (en) 2008-05-01 2015-10-30 Arcelik Anonim Sirketi A compressor with improved refrigerant flow performance

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3082867B2 (en) * 1991-07-09 2000-08-28 株式会社日立製作所 Hermetic compressor
US5816783A (en) * 1993-05-19 1998-10-06 Hitachi, Ltd. Electrically driven hermetic compressor
DE19515217C2 (en) * 1995-04-28 1999-03-11 Danfoss Compressors Gmbh Refrigerant compressors
US6623258B1 (en) * 1999-05-25 2003-09-23 Danfoss Compressors Gmbh Axial piston refrigerant compressor with piston front face projection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005010365A1 *

Also Published As

Publication number Publication date
ATE484678T1 (en) 2010-10-15
WO2005010365A1 (en) 2005-02-03
DE602004029601D1 (en) 2010-11-25
EP1680599B1 (en) 2010-10-13
ES2351695T3 (en) 2011-02-09
TR200601184T1 (en) 2006-08-21

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