[go: up one dir, main page]

WO2020015901A1 - A cylinder head of a hermetic reciprocating compressor - Google Patents

A cylinder head of a hermetic reciprocating compressor Download PDF

Info

Publication number
WO2020015901A1
WO2020015901A1 PCT/EP2019/063786 EP2019063786W WO2020015901A1 WO 2020015901 A1 WO2020015901 A1 WO 2020015901A1 EP 2019063786 W EP2019063786 W EP 2019063786W WO 2020015901 A1 WO2020015901 A1 WO 2020015901A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
exhaust
plenum
exhaust plenum
suction
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.)
Ceased
Application number
PCT/EP2019/063786
Other languages
French (fr)
Inventor
Ahmet Refik Ozdemir
Hasim OTUNC
Bilgin Hacioglu
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 WO2020015901A1 publication Critical patent/WO2020015901A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0423—Cylinders
    • 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 cylinder head enabling heat insulation particularly in hermetic reciprocating compressors.
  • a rotor is enabled to rotate by the magnetic field effect occurring between the stator and the rotor.
  • the refrigerant coming from an evaporator during cooling cycle enters the compressor by means of a suction tube provided on the housing.
  • a suction muffler is used in a suction line to mitigate the noise generated due to pressure fluctuations.
  • the refrigerant After passing through the suction muffler, the refrigerant passes through a suction valve opening and closing due to pressure difference between a suction plenum and a cylinder volume, and enters the cylinder volume.
  • the refrigerant then passes through an exhaust muffler and a vibration eliminator enabling damping the vibrations and noise generated during exhaust stage.
  • the exhaust plenum region is also in thermal connection with the body. Heat is transferred to the valve plate and body region due to high temperatures reached after compression. This causes to increase the temperature of the low temperature refrigerant sucked when the piston advances from the upper dead center to the lower dead center. In turn, this reduces the amount of fluid sucked in the cylinder in unit of time, and causes the volumetric efficiency and cooling capacity of the compressor to decrease.
  • WO2007068072 discloses a hermetic compressor in which heat transfer with a valve plate is decreased by disposing an exhaust plenum in a single enclosed volume.
  • the aim of the present invention is to realize a cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors.
  • the cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors, comprises in its most basic form,
  • the cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors, comprises at least one body and at least one suction plenum provided on the body.
  • the refrigerant which is to enter a suction valve passes through the suction plenum.
  • the fluid discharged from an exhaust valve enters the exhaust plenum provided on the body.
  • At least one insulation surface restricting heat transfer with the valve plate is provided on the portion of the body facing the valve plate. Since the insulation surface covers the region where the exhaust plenum is disposed, at least one exhaust plenum opening is provided on the insulation surface to enable the refrigerant leaving the exhaust valve to pass to the exhaust plenum.
  • the refrigerant leaving the exhaust valve reaches the exhaust plenum by passing through said exhaust plenum opening.
  • the body of the cylinder head of the invention is shaped roughly as a box with one side open. The open portion of this box is at least partially covered by the insulation surface. Said enclosed volume of the cylinder head enables reducing heat transfer from the exhaust plenum to the valve plate, refrigerant and the suction plenum.
  • the body and the insulation plate are made of plastic. Since thermal conduction of plastic is lower with respect to metal, the cylinder head of the invention provides a better thermal insulation compared to state of the art cylinder heads.
  • the cylinder head of the invention enables thermally insulating exhaust gasses from the suction plenum and the valve plate. Therefore, the refrigerant passing through the suction plenum does not heat by the effect of exhaust gasses, which in turn increases the volumetric efficiencies of the compressors utilizing the cylinder head of the invention.

Landscapes

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

Abstract

The present invention relates to a cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors, characterized by at least one insulation surface enabling reducing heat exchange with a valve plate, and by at least one exhaust plenum opening provided on the insulation surface, for discharging exhaust gasses from the exhaust plenum.

Description

[Title established by the ISA under Rule 37.2] A CYLINDER HEAD OF A HERMETIC RECIPROCATING COMPRESSOR
The present invention relates to a cylinder head enabling heat insulation particularly in hermetic reciprocating compressors.
Particularly in hermetic reciprocating compressor used in refrigerators, a rotor is enabled to rotate by the magnetic field effect occurring between the stator and the rotor. The refrigerant coming from an evaporator during cooling cycle, enters the compressor by means of a suction tube provided on the housing. A suction muffler is used in a suction line to mitigate the noise generated due to pressure fluctuations. After passing through the suction muffler, the refrigerant passes through a suction valve opening and closing due to pressure difference between a suction plenum and a cylinder volume, and enters the cylinder volume. The refrigerant then passes through an exhaust muffler and a vibration eliminator enabling damping the vibrations and noise generated during exhaust stage.
Since the gas in the housing is in contact with other components of the compressor, a variation in the temperature of this gas directly affects the compressor performance. A reduction in average inner gas temperature enables the compressor to operate more efficiently in thermal and electrical terms. High temperature of the inner gas causes the motor efficiency to drop, and the compressor components and oil to heat. In addition, the refrigerant in the suction muffler mixes with the fresh refrigerant sucked from the suction muffler bellows and therefore the average temperature of the refrigerant also increases. This causes the cooling capacity and COP (Coefficient of Performance) of the compressor to decrease. Therefore, reducing the heat transferred to the inner gas from the exhaust plenum and the cylinder head which are the most heated regions of the compressor after compression, is of critical importance in terms of compressor performance.
The exhaust plenum region is also in thermal connection with the body. Heat is transferred to the valve plate and body region due to high temperatures reached after compression. This causes to increase the temperature of the low temperature refrigerant sucked when the piston advances from the upper dead center to the lower dead center. In turn, this reduces the amount of fluid sucked in the cylinder in unit of time, and causes the volumetric efficiency and cooling capacity of the compressor to decrease.
State of the art international patent application no. WO2007068072 discloses a hermetic compressor in which heat transfer with a valve plate is decreased by disposing an exhaust plenum in a single enclosed volume.
State of the art international patent application no. WO2012166051 mentions a valve plate enabling reducing the heat transfer between the valve plate and its region on body-cylinder side.
None of the state of the art documents include a solution such as the one in the present invention.
The aim of the present invention is to realize a cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors.
The cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors, comprises in its most basic form,
  • at least one body,
  • at least one suction plenum provided on the body and guiding refrigerant passage to a suction valve,
  • at least one exhaust plenum provided on the body, through which exhaust gasses are discharged,
  • at least one insulation surface enabling reducing heat exchange with a valve plate, and
  • at least one exhaust plenum opening provided on the insulation surface, for discharging exhaust gasses from the exhaust plenum.
In its most basic form, the cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors, comprises at least one body and at least one suction plenum provided on the body. The refrigerant which is to enter a suction valve, passes through the suction plenum. The fluid discharged from an exhaust valve, enters the exhaust plenum provided on the body. At least one insulation surface restricting heat transfer with the valve plate, is provided on the portion of the body facing the valve plate. Since the insulation surface covers the region where the exhaust plenum is disposed, at least one exhaust plenum opening is provided on the insulation surface to enable the refrigerant leaving the exhaust valve to pass to the exhaust plenum. The refrigerant leaving the exhaust valve reaches the exhaust plenum by passing through said exhaust plenum opening.
The body of the cylinder head of the invention is shaped roughly as a box with one side open. The open portion of this box is at least partially covered by the insulation surface. Said enclosed volume of the cylinder head enables reducing heat transfer from the exhaust plenum to the valve plate, refrigerant and the suction plenum. In the preferred embodiment of the invention, the body and the insulation plate are made of plastic. Since thermal conduction of plastic is lower with respect to metal, the cylinder head of the invention provides a better thermal insulation compared to state of the art cylinder heads.
The cylinder head of the invention enables thermally insulating exhaust gasses from the suction plenum and the valve plate. Therefore, the refrigerant passing through the suction plenum does not heat by the effect of exhaust gasses, which in turn increases the volumetric efficiencies of the compressors utilizing the cylinder head of the invention.

Claims (3)

  1. A cylinder head enabling reducing heat transfer from exhaust plenum to other components particularly in hermetic reciprocating compressors, comprising
    - at least one body,
    - at least one suction plenum provided on the body and guiding refrigerant passage to a suction valve, and
    - at least one exhaust plenum provided on the body, through which exhaust gasses are discharged, characterized by
    - at least one insulation surface enabling reducing heat exchange with a valve plate, and by
    - at least one exhaust plenum opening provided on the insulation surface, for discharging exhaust gasses from the exhaust plenum.
  2. A cylinder head according to claim 1, comprising a body shaped roughly as a box with one side open and an insulation surface at least partially covering the open portion of the body.
  3. A cylinder head according to claim 2, comprising a body and an insulation plate made of plastic.
PCT/EP2019/063786 2018-07-19 2019-05-28 A cylinder head of a hermetic reciprocating compressor Ceased WO2020015901A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2018/10356 2018-07-19
TR201810356 2018-07-19

Publications (1)

Publication Number Publication Date
WO2020015901A1 true WO2020015901A1 (en) 2020-01-23

Family

ID=66776308

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/063786 Ceased WO2020015901A1 (en) 2018-07-19 2019-05-28 A cylinder head of a hermetic reciprocating compressor

Country Status (1)

Country Link
WO (1) WO2020015901A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597872B1 (en) * 1991-07-04 1996-04-10 EMBRACO EUROPE S.r.l. A hermetic motor-driven compressor unit for refrigerating circuits
US5916349A (en) * 1997-11-20 1999-06-29 Czabala; Michael P. Piston assembly and method for reducing the temperature of a compressor cup seal
US6457947B1 (en) * 1997-08-29 2002-10-01 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Piston compressor for refrigerant, with thermal insulation
US20050106034A1 (en) * 2003-11-17 2005-05-19 Fuminobu Enokijima Heat insulating structure of compressor
WO2007068072A1 (en) 2005-12-16 2007-06-21 Whirlpool S.A. Hermetic compressor with internal thermal insulation
DE102009003998A1 (en) * 2008-01-09 2009-07-23 Kabushiki Kaisha Toyota Jidoshokki, Kariya compressor
WO2012166051A1 (en) 2011-06-01 2012-12-06 Panasonic Corporation A valve plate for a compressor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597872B1 (en) * 1991-07-04 1996-04-10 EMBRACO EUROPE S.r.l. A hermetic motor-driven compressor unit for refrigerating circuits
US6457947B1 (en) * 1997-08-29 2002-10-01 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Piston compressor for refrigerant, with thermal insulation
US5916349A (en) * 1997-11-20 1999-06-29 Czabala; Michael P. Piston assembly and method for reducing the temperature of a compressor cup seal
US20050106034A1 (en) * 2003-11-17 2005-05-19 Fuminobu Enokijima Heat insulating structure of compressor
WO2007068072A1 (en) 2005-12-16 2007-06-21 Whirlpool S.A. Hermetic compressor with internal thermal insulation
DE102009003998A1 (en) * 2008-01-09 2009-07-23 Kabushiki Kaisha Toyota Jidoshokki, Kariya compressor
WO2012166051A1 (en) 2011-06-01 2012-12-06 Panasonic Corporation A valve plate for a compressor

Similar Documents

Publication Publication Date Title
CN103782034B (en) Hermetic type compressor
US8257061B2 (en) Hermetic compressor with internal thermal insulation
US7052247B2 (en) Suction muffler for compressors, compressor with the suction muffler, and apparatus having refrigerant circulation circuit including the compressor
JP6286364B2 (en) Hermetic compressor and refrigeration system
US11434887B2 (en) Linear compressor with suction guide and suction muffler
JP4682596B2 (en) Hermetic compressor
US11746768B2 (en) Linear compressor
JP5106395B2 (en) Hermetic compressor with heat dissipation system
WO2020015901A1 (en) A cylinder head of a hermetic reciprocating compressor
JPH06117372A (en) Closed type electrically-driven compressor
KR102432495B1 (en) Linear compressor
WO2019129432A1 (en) A hermetic compressor
WO2020015900A1 (en) An insulation cap
JP2000274363A (en) Hermetic compressor
JP2848418B2 (en) Hermetic electric compressor
WO2020057826A1 (en) A compressor comprising a suction muffler
JPH0599141A (en) Closed type motor-operated compressor
KR100216191B1 (en) Discharing muffler of compressor
WO2019129431A1 (en) A heat pipe
WO2022203598A1 (en) Hermetic compressor
KR20220098552A (en) Linear compressor
JPH05126049A (en) Hermetic type motor driven compressor
WO2009132955A1 (en) A compressor
KR20080001226A (en) Hermetic compressor
MX2008007838A (en) Hermetic compressor with internal thermal insulation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19728910

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19728910

Country of ref document: EP

Kind code of ref document: A1