EP0597872B1 - Compresseur hermetique a moteur pour circuits de refrigeration - Google Patents

Compresseur hermetique a moteur pour circuits de refrigeration Download PDF

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Publication number
EP0597872B1
EP0597872B1 EP92913412A EP92913412A EP0597872B1 EP 0597872 B1 EP0597872 B1 EP 0597872B1 EP 92913412 A EP92913412 A EP 92913412A EP 92913412 A EP92913412 A EP 92913412A EP 0597872 B1 EP0597872 B1 EP 0597872B1
Authority
EP
European Patent Office
Prior art keywords
end portion
intake
valve plate
manifold
compartment
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.)
Expired - Lifetime
Application number
EP92913412A
Other languages
German (de)
English (en)
Other versions
EP0597872A1 (fr
Inventor
Giuseppe Bo
Federigo Peruzzi
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.)
Embraco Europe SRL
Original Assignee
Embraco Europe SRL
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 Embraco Europe SRL filed Critical Embraco Europe SRL
Publication of EP0597872A1 publication Critical patent/EP0597872A1/fr
Application granted granted Critical
Publication of EP0597872B1 publication Critical patent/EP0597872B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04B39/123—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
    • 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
    • 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
    • F04B39/0072—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes characterised by assembly or mounting

Definitions

  • the present invention relates to a hermetic motor-driven compressor unit for refrigerating circuits and the like including, in a hermetic housing, a reciprocating compressor and its electric motor with a pack of plates, in which the compressor includes a cylinder with a valve plate fixed against an end face of the cylinder and a manifold fixed in turn against the valve plate, in which the end of the valve plate nearest the electric motor includes a projecting end portion, and in which an intake silencer, in the form of a hollow body of plastics material, is fixed to a front face of the projecting end portion on the same side as the manifold, an intake header chamber being disposed on the opposite side of the end portion and communicating with the interior of the hollow body by means of through holes in the end portion.
  • the intake header chamber is constituted by a cavity in the cast iron of the cylinder block near the cylinder.
  • the cavity is closed by the projecting end portion of the valve plate.
  • the silencer is constituted by a hollow body of plastics material which is fixed to the projecting end portion of the valve plate by tubular pins which are snap-engaged in corresponding holes in the end portion and which also establish communication between the interior of the silencer and the header chamber.
  • this known arrangement enables the unit constituted by the valve plate, its manifold and the silencer to be preassembled fairly easily and also subsequently to be fitted fairly easily onto the block and its cylinder.
  • An object of the invention is to provide a hermetic motor-driven compressor unit of the type in question, in which the arrangement of the intake system is not only just as advantageous from the point of view of its assembly but which also improves the performance of the compressor.
  • Another object of the invention is to achieve better silencing of the compressor with the same arrangement of the intake system.
  • a motor-driven compressor unit of the type mentioned at the beginning characterised in that a space defined between the cylinder and the pack of plates of the electric motor is open towards the projecting end portion of the valve plate, in that the intake header chamber is constituted by a second hollow body of plastics material which acts as a further silencer, is housed in the space, is in contact neither with the cylinder nor with the pack of plates, and is fixed to the end portion, in that the manifold is divided internally into a delivery compartment and an intake compartment, of which the latter contains a valved intake opening in the valve plate and a communication hole in the plate, and in that the second hollow body has an outlet which communicates with the intake compartment through the communication hole.
  • the header chamber defined by the second hollow body is thermally insulated from the hot metal parts of the motor-driven compressor, to the benefit of its performance.
  • the spaces in the two hollow bodies together attenuate the noise better since, with suitable dimensions, they can constitute cavities which are resonant in two different frequency bands and which together can attenuate a wider range of frequencies than would be the case with only one resonant cavity, even of a greater volume, such as that of the prior document mentioned above.
  • the unit constituted by the valve plate, the manifold and the two silencer bodies according to the invention is suitable for preassembly and subsequent fitting onto the compressor block by methods just as easy as those of the prior art mentioned above.
  • the intake compartment of the manifold preferably contains a half-shell of plastics material which is open towards the valve plate and the walls of which are spaced from the corresponding internal surfaces of the compartment so as to be thermally insulated.
  • a further advantage of the arrangement according to the invention consists of the fact that the fluid taken in follows a labyrinthine path from the first hollow body to the second and then into the manifold before it reaches the interior of the cylinder through the intake valve, thus improving the separation of the drops of liquid entrained in the gas.
  • a motor-driven compressor unit includes a hermetic housing, generally indicated 10.
  • the housing 10 houses a motor-driven compressor, generally indicated 12.
  • the motor-driven compressor 12 includes an electric motor, generally indicated 14 and a positive-displacement compressor, generally indicated 16.
  • the pack of stator plates of the motor 14 is indicated 18.
  • the block or casing of the compressor 16, indicated 20, is fixed above the pack of stator plates 18.
  • the rotor of the electric motor 14 is indicated 22 and its hollow vertical shaft is indicated 24.
  • the upper end of the shaft 24 has a crank 25 which is connected by means of a connecting rod 26 to a piston 28 which is slidable horizontally in a cylinder 30.
  • the cylinder 30 is formed in the block or casing 20 which may be of cast iron.
  • the head end of the cylinder 30 has a flat end face 32.
  • a head unit 34 which will now be described with particular reference to Figures 3 and 4, is fixed to the end face 32 by screws.
  • the head unit 34 includes seals which, for simplicity, are neither shown nor described.
  • the head unit 34 includes, amongst other things, a valve plate 36, the structure of which is the same as, or similar to that of the document WO 86/02703.
  • the plate 36 includes an end portion 38 which projects at its end nearest the electric motor 14 (downwardly in Figures 1 and 2).
  • a space 40 defined between the cylinder 30 and the pack of plates 18 (Figure 1) is open towards the projecting end portion 38, which faces it.
  • a hollow manifold 42 for example, of light alloy, is fixed against the outer face of the valve plate 36.
  • the manifold 42 does not extend over the projecting end portion 38.
  • An intake silencer 44 with an intake opening 45 is fixed to the front face of the end portion 38 immediately below the manifold 42.
  • the silencer 44 is constituted by a hollow, shaped element moulded from plastics material.
  • the end portion 38 has a pair of through-holes 48.
  • Corresponding tubular split pins 50 integral with the hollow body 44 extend through the holes 48.
  • One of the pins is also visible at 50 in Figure 1.
  • the pins 50 are snap-engaged in corresponding holes 52 in the other body 46, thus fixing the two bodies 44 and 46 together and to the end portion 38 of the valve plate 36 and also establishing communication between the cavities of the two bodies 44 and 46.
  • the second silencer or hollow body 46 has an outlet constituted by a tubular appendage 56 which extends through a corresponding through-hole 58 in the valve plate 36 to communicate with the interior of the manifold 42.
  • the manifold 42 has an internal cavity which is open towards the valve plate 36 and which is divided by a central partition 60 into a delivery compartment 62 and an intake compartment 64.
  • the delivery compartment 62 communicates with the interior of the cylinder 30 ( Figure 1) by means of a delivery valve, generally indicated 66 in Figure 3, which in turn communicates in a conventional manner, not shown, with a delivery silencer 70.
  • the duct defined by the tubular appendage 56 opens, by means of the through-hole 58, into the intake compartment 64.
  • the valve plate 36 has a valved intake opening 68 which communicates with the interior of the cylinder 30 by means of a plate obturator 70 ( Figure 4) .
  • the obturator 70 is formed by blanking in a plate 72 associated with the "internal" face of the valve plate 36. This plate 72 is not shown in Figure 3 since it belongs to the prior art.
  • a half-shell 74 of plastics material is preferably inserted in the intake compartment 64 of the manifold 42.
  • the peripheral walls of the half-shell 74 are shaped according to the cross-section of the compartment 64 and are spaced from the peripheral surfaces of the compartment 64 by external ribs 76.
  • the end wall of the half-shell 74 is also spaced from the end surface of the compartment 64 by corresponding ribs 78.
  • the half-shell 74 is thus thermally insulated from the metal surfaces of the manifold 42.
  • the half-shell 74 also constitutes a third silencer disposed downstream in the series of silencers 44, 46 and 74, so as to increase to a maximum the range of frequencies in which the noise of the compressor is attenuated during intake as a result of the suitable dimensioning of the resonant cavities of the individual silencers.

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

Abstract

Un espace (40) défini entre le cylindre (30) et la pile de plaques (18) du moteur électrique (14) du compresseur est ouvert vers une partie terminale saillante (38) d'une plaque de vanne (36). Un premier silencieux d'admission (44) constitué d'un corps creux en matière plastique est fixé sur une face extérieure de la partie terminale (38). Un second silencieux d'admission constitué par un second corps creux (46) est logé dans l'espace (40) sans contact thermique. La sortie du second silencieux (46) conduit à un compartiment d'admission (64) d'un collecteur (42). Le compartiment d'admission contient de préférence une demie-enveloppe (74) d'isolation thermique faisant office de troisième silencieux.

Claims (3)

  1. Ensemble de compresseur hermétique à moteur pour circuits de réfrigération et analogues, comprenant, dans une enveloppe hermétique (10), un compresseur (16) à mouvement alternatif et son moteur électrique (14), ensemble dans lequel le compresseur (16) comprend un cylindre (30) muni d'une plaque porte-valve (36) fixée contre une face terminale (32) du cylindre (30) et un collecteur-distributeur (42) fixé à son tour à la plaque porte-valve (36), dans lequel l'extrémité de la plaque porte-valve (36) située la plus près du moteur électrique (14) comprend une partie terminale saillante (38), et dans lequel un silencieux d'admission (44), sous la forme d'un corps creux en matière plastique, est fixé à une face avant de la partie terminale saillante (38) sur le même côté que le collecteur-distributeur (42), une chambre collectrice d'admission étant disposée sur la face opposée de la partie terminale (38) et communiquant avec l'intérieur du corps creux (44) au moyen de trous traversants (48) ménagés dans la partie terminale (38), caractérisé en ce qu'un espace (40) défini entre le cylindre (30) et le paquet de tôles (18) du moteur électrique (14) est ouvert en direction de la partie terminale saillante (38) de la plaque porte-valve (36), en ce que la chambre collectrice d'admission est constituée par un second corps creux (46) en matière plastique qui agit comme un autre silencieux, est logé dans l'espace (40), n'est en contact ni avec le cylindre (30) ni avec le paquet de tôles (18), et est fixé à la partie terminale (38), en ce que le collecteur-distributeur (42) est divisé intérieurement en un compartiment de décharge (62) et un compartiment d'admission (64), ce dernier contenant une ouverture d'admission (68) à valve dans la plaque porte-valve (36) et un trou de communication (58) ménagé dans la plaque, et en ce que le second corps creux (46) comporte une sortie (56) qui communique avec le compartiment d'admission (64) par le trou de communication (58).
  2. Ensemble de compresseur à moteur selon la revendication 1, caractérisé en ce que le compartiment d'admission (64) du collecteur-distributeur (42) contient une demi-enveloppe (74) en matière plastique qui est ouverte en direction de la plaque porte-valve (36) et dont les parois sont espacées des surfaces internes correspondantes du compartiment de manière à être isolées thermiquement.
  3. Ensemble de compresseur à moteur selon la revendication 1 ou la revendication 2, caractérisé en ce que les deux corps creux (44, 46) en matière plastique sont fixés l'un à l'autre ainsi qu'à la partie terminale saillante (38) de la plaque porte-valve (36) par des axes tubulaires (50) qui font saillie d'un des corps, s'étendent à travers les trous traversants (48) ménagés dans la partie terminale (38) et sont engagés élastiquement dans des trous correspondants (52) ménagés dans l'autre corps, les axes (50) constituant aussi des conduits de communication entre les cavités des deux corps (44, 46).
EP92913412A 1991-07-04 1992-06-29 Compresseur hermetique a moteur pour circuits de refrigeration Expired - Lifetime EP0597872B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITTO910522 1991-07-04
ITTO910522A IT1250797B (it) 1991-07-04 1991-07-04 Gruppo motocompressore ermetico per circuiti frigoriferi
PCT/EP1992/001454 WO1993001412A1 (fr) 1991-07-04 1992-06-29 Compresseur hermetique a moteur pour circuits de refrigeration

Publications (2)

Publication Number Publication Date
EP0597872A1 EP0597872A1 (fr) 1994-05-25
EP0597872B1 true EP0597872B1 (fr) 1996-04-10

Family

ID=11409469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92913412A Expired - Lifetime EP0597872B1 (fr) 1991-07-04 1992-06-29 Compresseur hermetique a moteur pour circuits de refrigeration

Country Status (5)

Country Link
EP (1) EP0597872B1 (fr)
DE (1) DE69209840T2 (fr)
DK (1) DK0597872T3 (fr)
IT (1) IT1250797B (fr)
WO (1) WO1993001412A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020015901A1 (fr) * 2018-07-19 2020-01-23 Arcelik Anonim Sirketi Culasse d'un compresseur hermétique à mouvement de va-et-vient

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0143182B1 (ko) * 1994-04-29 1998-08-01 김광호 압축기
DE19522383C2 (de) * 1995-06-23 1997-06-19 Danfoss Compressors Gmbh Saugschalldämpfer für einen Kältemittelkompressor
US5804777A (en) * 1995-11-02 1998-09-08 Lg Electronics Inc. Suction noise muffler for hermetic compressor
DE19881579D2 (en) * 1997-08-29 2000-10-12 Luk Fahrzeug Hydraulik Kompressor mit überlastenkopplungseinrichtung
CN100396918C (zh) * 2003-06-26 2008-06-25 乐金电子(天津)电器有限公司 密闭型压缩机的排放消音器固定结构
JP4020068B2 (ja) * 2003-11-17 2007-12-12 株式会社豊田自動織機 圧縮機における断熱構造

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1601859C3 (de) * 1968-03-16 1978-11-02 Danfoss A/S, Nordborg (Daenemark) Hermetisch gekapselter Motorverdichter für eine Kältemaschine
US3698840A (en) * 1971-05-26 1972-10-17 Tecumseh Products Co Compressor muffler construction
IT1179810B (it) * 1984-10-31 1987-09-16 Aspera Spa Gruppo motocompressore ermetico per circuiti frigoriferi
IT1184167B (it) * 1985-03-21 1987-10-22 Eurodomestici Ind Riunite Perfezionamento nei motocompressori sigillati per circuiti frigoriferi
BR8602173A (pt) * 1986-05-02 1987-12-22 Brasil Compressores Sa Aperfeicoamento em sistema de succao de compressor hermetico de refrigeracao

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020015901A1 (fr) * 2018-07-19 2020-01-23 Arcelik Anonim Sirketi Culasse d'un compresseur hermétique à mouvement de va-et-vient

Also Published As

Publication number Publication date
DE69209840D1 (de) 1996-05-15
ITTO910522A1 (it) 1993-01-04
ITTO910522A0 (it) 1991-07-04
IT1250797B (it) 1995-04-21
DK0597872T3 (da) 1996-08-19
EP0597872A1 (fr) 1994-05-25
WO1993001412A1 (fr) 1993-01-21
DE69209840T2 (de) 1996-08-22

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