WO2022203598A1 - Compresseur hermétique - Google Patents

Compresseur hermétique Download PDF

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Publication number
WO2022203598A1
WO2022203598A1 PCT/SG2022/050151 SG2022050151W WO2022203598A1 WO 2022203598 A1 WO2022203598 A1 WO 2022203598A1 SG 2022050151 W SG2022050151 W SG 2022050151W WO 2022203598 A1 WO2022203598 A1 WO 2022203598A1
Authority
WO
WIPO (PCT)
Prior art keywords
suction
refrigerant
suction tube
compression chamber
cylinder head
Prior art date
Application number
PCT/SG2022/050151
Other languages
English (en)
Inventor
Masakazu Yamaoka
Quan Feng Victor LEE
Cheow Bin CHEANG
Grace Cyl. DE OCAMPO
Khai Huat ONG
Original Assignee
Panasonic Appliances Refrigeration Devices Singapore
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 Panasonic Appliances Refrigeration Devices Singapore filed Critical Panasonic Appliances Refrigeration Devices Singapore
Publication of WO2022203598A1 publication Critical patent/WO2022203598A1/fr

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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • 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
    • F04B39/123—Fluid connections
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • 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
    • F04B39/066—Cooling by ventilation
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/10—Inlet temperature

Definitions

  • the present disclosure relates to hermetic compressors and in particular to the suction arrangement of a hermetic compressor.
  • Hermetic compressors typically comprise a suction arrangement which allows refrigerant gas returning from a refrigeration cycle to be drawn into the hermetic shell of the hermetic compressor and drawn through a suction muffler into a compression chamber within a cylinder block of the hermetic compressor. Examples of suction arrangements in hermetic compressors are described in US Patent 8,992,186 and Japanese Patent Application Publication 2008-267365.
  • a hermetic compressor comprises: a hermetic shell having a hermetically sealed interior; a suction tube passing through the hermetic shell and having a suction tube outlet within the hermetically sealed interior; a cylinder block arranged within the hermetic shell and defining a compression chamber; a cylinder head forming a closed end of the compression chamber; a suction muffler having a suction muffler inlet opening within the hermetically sealed interior; and a discharge tube passing through the hermetic shell and in communication with the closed end of the compression chamber, the hermetic compressor being configured to draw a refrigerant into the compression chamber from suction tube outlet through the suction muffler, and to compress the refrigerant in the compression chamber such that compressed refrigerant passes through the closed end of the compression chamber and into the discharge tube, wherein the suction tube outlet is arranged to direct refrigerant flowing from the suction tube
  • the suction muffler inlet is laterally offset from the suction tube outlet. By laterally offsetting the suction muffler inlet from the suction tube outlet, the refrigerant is forced to flow over the surface of the cylinder head.
  • the suction muffler inlet is arranged adjacent to a first side of the cylinder head and the suction tube outlet is arranged to be closer to a second side of the cylinder head which opposes the first side than to the first side of the cylinder head.
  • the suction muffler is vertically offset from the suction tube outlet, by vertically offsetting the suction muffler inlet from the suction tube outlet, the refrigerant is forced to flow over the surface of the cylinder head.
  • the suction muffler inlet is arranged in a position which is vertically higher than the position of the suction tube outlet. This provides for suppressing the amount of liquid refrigerant that enters the suction muffler inlet.
  • the suction tube outlet and suction muffler inlet are arranged such that refrigerant in a gaseous form flows from the suction tube outlet Into the suction muffler inlet and refrigerant in a liquid state flows from the suction tube outlet into the hermetically sealed interior of the hermetic shell.
  • the suction muffler inlet faces vertically upwards. This also provides for suppressing the amount of liquid refrigerant that enters the suction muffler inlet,
  • the refrigerant is a mixed refrigerant.
  • the refrigerant may comprise at least one of R404A, and R448A.
  • FIG.1 shows a perspective view of a hermetic compressor according to an embodiment of the present invention
  • FIG.2 shows a top down view of a hermetic compressor according to an embodiment of the present invention
  • FIG.3 shows a side view of hermetic compressor according to an embodiment of the present invention.
  • FIG.4 shows a suction muffler of a hermetic compressor according to an embodiment of the present invention.
  • FIG.1 shows a perspective view of a hermetic compressor according to an embodiment of the present invention.
  • the hermetic compressor 100 is housed within a hermetic shell which is formed from a lower shell portion 101 and an upper shell portion 102.
  • the hermetic shell forms a hermetically sealed interior in which an electromotive part 110 and a compression part 120 of the hermetic compressor 100 are located.
  • the electromotive part 110 comprises a stator and a rotor.
  • the stator and the rotor are arranged coaxially and the rotor is arranged within the stator.
  • the electromotive part 110 electrically is coupled to an electrical connection 111 located on the lower shell portion 102.
  • the electromotive part 110 is supported above the base of the hermetic shell by springs 103.
  • the compression part 120 is arranged above the electromotive part 110.
  • the compression part 120 comprises a cylinder block 121.
  • the cylinder block 121 has a cylindrical cavity that forms a compression chamber.
  • a piston is movable within the cylindrical cavity.
  • the piston is coupled to a connecting rod.
  • the connecting rod is coupled to a crankshaft.
  • the crankshaft comprises a main shaft portion and an eccentric shaft portion. The main shaft portion is attached to the rotor of the electromotive part 110.
  • a suction muffler 130 is located adjacent to the cylinder head.
  • the suction muffler 130 has a suction muffler inlet which opens to the hermetically sealed interior of the hermetic shell.
  • the suction muffler 130 has a suction muffler outlet which is coupled to the compression chamber.
  • a suction tube 140 passes through the hermetic shell and has a suction tube outlet 141 located inside the hermetically sealed interior.
  • a discharge tube 150 is coupled to the closed end of the compression chamber and passes through the hermetic shell.
  • a suction valve is provided between the suction muffler 130 and the compression chamber, and a discharge valve is provided between the compression chamber and the closed end of the compression chamber which is coupled to the discharge tube.
  • the suction valve is open and the discharge valve is closed as the piston moves away from the cylinder head 122.
  • the suction valve closes and the refrigerant in the compression chamber is compressed.
  • the increase in pressure as the piston moves towards the cylinder head 122 causes the discharge valve to open.
  • the discharge valve is open, the compressed refrigerant passes through the cylinder head 122 and into the discharge tube 150.
  • the suction tube outlet 141 is arranged to overlap with the cylinder head 122. This means that the refrigerant exiting the suction tube outlet 141 is directed towards the cylinder head 122.
  • the suction muffler inlet 131 is located at an opposite side of the cylinder head 122 from the location of the suction tube outlet 141. This means that the refrigerant exiting the suction tube outlet 141 and flowing into the suction muffler inlet 131 flows over a surface of the cylinder head 122. This has an effect of reducing the temperature of the compressed refrigerant which enters the discharge tube 150. As the refrigerant is compressed in the compression chamber, the temperature of the refrigerant increases.
  • the compressed refrigerant entering the discharge tube 150 from the from the closed end of the compression chamber has a higher temperature than the refrigerant entering the hermetically sealed interior formed by the hermetic shell.
  • the compressed refrigerant passes inside the cylinder head 122.
  • the cylinder head 122 and therefore the compressed refrigerant within the cylinder head 122 are cooled. This reduction of the temperature of the compressed refrigerant makes the operation of the refrigeration cycle incorporating the hermetically sealed compressor 100 more efficient.
  • FIG.2 shows a top down view of a hermetic compressor according to an embodiment of the present invention.
  • the suction tube outlet 141 is formed where the suction tube 140 meets the hermetic shell of the hermetic compressor 100.
  • the location of the suction tube outlet 141 overlaps with the cylinder head 122 and is close to one of the sides of the cylinder head 122.
  • the suction muffler 130 is located adjacent to the cylinder head 122 and on the opposite side of the cylinder head 122 from the location of the suction tube outlet 141. This means that refrigerant flowing from the suction tube outlet 141 to the suction muffler inlet 131 flows over the surface of the cylinder head 122.
  • FIG.3 shows a side view of hermetic compressor according to an embodiment of the present invention.
  • the suction tube outlet 141 of the suction tube 140 is arranged on the upper shell portion 102 of the hermetic shell.
  • the suction tube outlet 141 is positioned to overlap with the cylinder head 122. Position of the suction tube outlet 141 is close to one side of the cylinder head 122.
  • the suction muffler 130 is arranged adjacent to and below the cylinder head 122.
  • the suction muffler inlet 131 is positioned adjacent to the side of the cylinder head 122 which is opposite to the side of the cylinder head 122 close to the suction tube outlet 141.
  • the suction tube outlet 141 is laterally offset from the suction muffler inlet 131.
  • the suction tube outlet 141 is vertically offset from the suction muffler inlet 131.
  • the vertical position of the suction tube outlet 141 is offset from the suction muffler inlet 131. This has the effect of increasing the distance over the surface of the cylinder head 122 that the refrigerant travels when flowing from the suction tube outlet 141 to the suction muffler inlet 131. This increases the cooling effect on the compressed refrigerant which flows to the discharge tube 150.
  • the suction muffler inlet 131 is vertically above the suction tube outlet 141.
  • the offsetting of the positions of the suction muffler inlet 131 and the suction tube outlet 141 and in particular the positioning of the suction muffler inlet 131 above the suction tube outlet 141 has an additional effect of suppressing the intake of liquid refrigerant.
  • FIG.4 shows a suction muffler of a hermetic compressor according to an embodiment of the present invention.
  • the suction muffler 130 has a suction muffler inlet 131 which faces upwards and is arranged in a position above the suction muffler body 132.
  • a suction muffler outlet 133 extends from the suction muffler body 132 and couples to the interior of the compression chamber of the cylinder block 121.
  • the configuration of the suction muffler 130 shown in FIG.4 provides for reducing the intake of liquid refrigerant into the suction muffler 130 and therefore suppresses the presence of liquid refrigerant in the compression chamber.
  • This effect is achieved because the gas intake into the suction muffler inlet 131 is faces upwards, reducing the amount of liquid that enters the suction muffler 130.
  • the suction muffler inlet 131 is positioned at vertically high position, this means that the distance from oil and liquid refrigerant that collects in the bottom of the hermetic shell is maximized.
  • Compressors having the suction arrangement described above may be used in commercial refrigeration applications.
  • R404A and R448A and other mixed refrigerants are used in these applications.
  • An embodiment uses R404A, but since there is a global shift towards the usage of low global warming potential (GWP) refrigerants, R448A is considered since it has lower GWP.
  • GWP global warming potential
  • R448A is a non-azeotropic refrigerant blend that possess temperature glide which results from the different refrigerant blends that boils across a range of temperatures at any given pressure. Temperature glide varies depending on each mixed refrigerant composition. Due to the characteristics of these refrigerants, there is an increase in the discharge gas temperature during operation, which eventually affects the efficiency and the reliability of the compressor. Due to this increase in discharge gas temperatures, the suction configuration described above which acts to reduce the discharge gas temperature is particularly advantageous.

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

Abstract

Des dispositifs d'aspiration dans des compresseurs hermétiques sont divulgués. Un compresseur hermétique comprend : une enveloppe hermétique ayant un intérieur hermétiquement fermé ; un tube d'aspiration traversant l'enveloppe hermétique et ayant une sortie de tube d'aspiration à l'intérieur de l'intérieur hermétiquement fermé ; un bloc moteur disposé à l'intérieur de l'enveloppe hermétique et définissant une chambre de compression ; une culasse formant une extrémité fermée de la chambre de compression ; un silencieux d'aspiration ayant une ouverture d'entrée de silencieux d'aspiration à l'intérieur de l'intérieur hermétiquement fermé ; et un tube à décharge passant à travers l'enveloppe hermétique et en communication avec l'extrémité fermée de la chambre de compression, le compresseur hermétique étant configuré pour aspirer un fluide frigorigène dans la chambre de compression à partir de la sortie de tube d'aspiration à travers le silencieux d'aspiration, et pour comprimer le fluide frigorigène dans la chambre de compression de telle sorte que le fluide frigorigène comprimé passe à travers l'extrémité fermée de la chambre de compression et dans le tube à décharge, la sortie de tube d'aspiration étant agencée pour diriger le fluide frigorigène s'écoulant du tube d'aspiration vers une surface de la tête de cylindre de telle sorte que le fluide frigorigène s'écoule sur la surface de la culasse avant d'entrer dans l'entrée de silencieux d'aspiration.
PCT/SG2022/050151 2021-03-22 2022-03-21 Compresseur hermétique WO2022203598A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG10202102924Y 2021-03-22
SG10202102924Y 2021-03-22

Publications (1)

Publication Number Publication Date
WO2022203598A1 true WO2022203598A1 (fr) 2022-09-29

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ID=83398095

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371319A (en) * 1979-07-13 1983-02-01 Hitachi, Ltd. Hermetic motor compressor
EP0195486A2 (fr) * 1985-03-21 1986-09-24 Whirlpool International B.V. Ensemble moteur-compresseur hermétique pour un circuit de réfrigération
JPH0942155A (ja) * 1995-07-29 1997-02-10 Samsung Electronics Co Ltd 圧縮機
KR200401344Y1 (ko) * 2005-09-06 2005-11-15 엘지전자 주식회사 밀폐형 압축기의 헤드커버 냉각구조
WO2007017820A1 (fr) * 2005-08-05 2007-02-15 Arcelik Anonim Sirketi Compresseur
WO2007148549A1 (fr) * 2006-06-23 2007-12-27 Panasonic Corporation Compresseur de type hermétique
WO2009090856A2 (fr) * 2008-01-17 2009-07-23 Panasonic Corporation Compresseur
US8992186B2 (en) * 2010-05-24 2015-03-31 Emerson Climate Technologies, Inc. Suction arrangement for a refrigeration compressor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371319A (en) * 1979-07-13 1983-02-01 Hitachi, Ltd. Hermetic motor compressor
EP0195486A2 (fr) * 1985-03-21 1986-09-24 Whirlpool International B.V. Ensemble moteur-compresseur hermétique pour un circuit de réfrigération
JPH0942155A (ja) * 1995-07-29 1997-02-10 Samsung Electronics Co Ltd 圧縮機
WO2007017820A1 (fr) * 2005-08-05 2007-02-15 Arcelik Anonim Sirketi Compresseur
KR200401344Y1 (ko) * 2005-09-06 2005-11-15 엘지전자 주식회사 밀폐형 압축기의 헤드커버 냉각구조
WO2007148549A1 (fr) * 2006-06-23 2007-12-27 Panasonic Corporation Compresseur de type hermétique
WO2009090856A2 (fr) * 2008-01-17 2009-07-23 Panasonic Corporation Compresseur
US8992186B2 (en) * 2010-05-24 2015-03-31 Emerson Climate Technologies, Inc. Suction arrangement for a refrigeration compressor

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