EP1031728A1 - Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération - Google Patents

Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération Download PDF

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Publication number
EP1031728A1
EP1031728A1 EP99830102A EP99830102A EP1031728A1 EP 1031728 A1 EP1031728 A1 EP 1031728A1 EP 99830102 A EP99830102 A EP 99830102A EP 99830102 A EP99830102 A EP 99830102A EP 1031728 A1 EP1031728 A1 EP 1031728A1
Authority
EP
European Patent Office
Prior art keywords
gas
motor
intake
driven compressor
compressor according
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
EP99830102A
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German (de)
English (en)
Other versions
EP1031728B1 (fr
Inventor
Alfredo Bar
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.)
Necchi Compressori SpA
Original Assignee
Necchi Compressori SpA
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 Necchi Compressori SpA filed Critical Necchi Compressori SpA
Priority to ES99830102T priority Critical patent/ES2155728T3/es
Priority to SI9930003T priority patent/SI1031728T1/xx
Priority to DK99830102T priority patent/DK1031728T3/da
Priority to EP99830102A priority patent/EP1031728B1/fr
Priority to DE69900051T priority patent/DE69900051T2/de
Priority to AT99830102T priority patent/ATE198926T1/de
Publication of EP1031728A1 publication Critical patent/EP1031728A1/fr
Application granted granted Critical
Publication of EP1031728B1 publication Critical patent/EP1031728B1/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
    • F04B39/0027—Pulsation and noise damping means
    • 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

Definitions

  • the present invention relates to a hermetically sealed motor-driven alternating compressor, particularly for refrigerating apparatuses, comprising a sealed case able to house an electric motor and an alternating compressor and presenting at least a first hole connected to an external pipe for the supply of the refrigerating gas and a second hole connected to an external pipe for the delivery of said gas positioned in continuation of an internal delivery pipe within the case itself.
  • refrigerating apparatuses are generally fitted with hermetically sealed motor-driven compressors of the alternating type each constituted by an electric motor and by an alternating compressor housed within a hermetically sealed container.
  • the latter presents a first hole connected to an external pipe for the intake of the refrigerating gas and a second hole connected to an external delivery pipe which, in turn, is positioned in continuation of a delivery pipe internal to the case itself.
  • the efficiency of a hermetically sealed motor-driven compressor is measured by specific parameters that relate the refrigerating efficiency to electrical consumption. Since international standards currently set out for refrigerating apparatuses a determined number of classes of daily or monthly energy consumption, which in the near future is due to be reduced to the one with the lowest value, it is essential to increase the overall efficiency of hermetically sealed motor-driven compressors.
  • thermodynamic efficiency can be improved by maintaining the temperature of the intake gas at the lowest possible levels.
  • currently adopted techniques propose to reduce as far as possible the absorption of heat by the flow of gas coming from the external intake pipe and headed, as soon as it enters the hermetically sealed case, towards the inlet port positioned on the head of the compressor cylinder.
  • This flow of gas tends to increase its temperature due to the presence, within the hermetically sealed case, both of the warm walls of the compressor and of the motor, and of warm gas.
  • a first known technique called semi-direct intake provides for the use inside the sealed case of an intake plenum connected in correspondence with its outlet directly to the input port of the compressor cylinder and presenting an inlet that opens in proximity to the hole of the case whereto the external intake pipe is connected.
  • the intake plenum is subdivided into chambers and gas passages duly dimensioned according to the resonator and/or silencer technique and it serves the purpose of reducing the noise level due to the pressure waves or pulsations that are transmitted through the intake gas.
  • the chambers and the passages of said intake plenum determine both a head loss, i.e. a pressure loss, of the gas and a prolongation of the route of the intake gas in an environment that is not adequately insulated from the warm space inside the case of the motor-driven compressor.
  • the intake gas tends therefore to raise its own temperature to the detriment of the efficiency of the thermal cycle, thereby partially cancelling the benefits that might be obtained with semi-direct intake.
  • a second known technique called direct intake partly overcomes the first of the drawbacks described above with reference to semi-direct intake, sending the gas directly into the inlet of the intake plenum through an elastically yielding tubular connecting element, interposed between said intake plenum and the wall of the case in correspondence with the hole connected to the external intake pipe.
  • the elastic yielding quality of the connecting element prevents the transmission of vibrations of the compressor to the external case.
  • the technical task set at the basis of the present invention is to devise a hermetically sealed motor-driven compressor for refrigerating apparatuses able substantially to overcome the aforementioned drawbacks.
  • an important aim of the invention is to devise a hermetically sealed motor-driven compressor that allows to minimise the transmission of heat to the intake gas obtaining, for the latter, temperatures considerably lower than those observed in the known technical techniques with semi-direct and direct intake.
  • a further important aim of the invention is to devise a hermetically sealed motor-driven compressor that substantially reduces the head losses of the intake gas upstream of the inlet port placed on the head of the compressor cylinder.
  • a hermetically sealed alternating motor-driven compressor that is characterised in that it comprises a conduit for directly conveying the gas between said first hole and an intake port positioned on the head of the compressor and in that said direct conveyance conduit comprises elastic means able to dampen the transmission of mechanical vibrations between the head of the compressor and of the sealed case.
  • the hermetically sealed alternating compressor according to the invention is globally indicated with the number 1.
  • It comprises a sealed case 2 able to house an electric motor 3a and an alternating compressor 3 known in itself and thus only partially shown.
  • the sealed case 2 presents a first hole 4 connected to an external pipe 5 for the intake of the refrigerating gas and a second hole 6 connected to an external delivery pipe 7 positioned in continuation of a delivery pipe 8 internal to the case 2 itself.
  • a pipe 11 for directly conveying the gas extends, able to serve the function of directly injecting the gas in the compressor 3 thereby minimising the route from the external intake pipe 5 to said intake port 9, i.e. inside the sealed case 2.
  • the conveying conduit 11 comprises elastic means 11a able to dampen the transmission of mechanical vibrations between the head of the compressor 10 and the sealed case 2.
  • Said elastic means 11a are defined by an elastic bellows portion of the conveying conduit 11 itself which engages a junction element 12 integrally engaged to the case 2 in correspondence with the first hole 4.
  • the reduction of the noise due to the pulsations of the intake gas is preferably effected both by first means 13 for damping the pulsations positioned externally to the case 2 in correspondence with the intake pipe 5, and by second damping means 14 positioned internally to the case 2.
  • the first means 13 for damping the pulsations comprise a plenum 13a for the expansion of the intake gas connected in series along the intake conduit 5.
  • the intake conduit 5 presents a first section 5a ending in the expansion plenum 13a and a second section 5b extending from a lower area of the plenum itself to connect to the direct conveying conduit 11 through the first hole 4.
  • a metallic reticular element 15 with very fine mesh is provided, able not only to serve as an oil separator by retaining the oil particles suspended in the refrigerating gas, but also to dampen the pulsations of the intake gas reducing its noise level and the repercussions on the intake line of the refrigerating system.
  • the oil collected in the reticular element 15 is taken from the plenum 13a to the lower part of the case 2 where it is normally present for the lubrication of the motor-driven compressor.
  • the second pulsation-damping means 14 are defined by at least one acoustic resonator, more specifically a Helmholtz resonator, positioned to the side of the direct conveyance conduit 11.
  • the latter presents lateral holes 11b communicating with the resonator 14 and able to allow the passage of the acoustic waves due to the pulsations of the intake gas.
  • the intake gas traverses the conduit 11 without mixing with the warm gas contained inside the Helmholtz resonators.
  • the only sound waves that penetrate and are damped therein are those whose frequencies correspond with those, coinciding with the frequencies produced by the compressor 3, for which the resonator is designed.
  • the Helmholtz resonator presents at the bottom one or more discharge holes 14a whose function is both to discharge any oil that may be present within it and to prevent the cavities defined by the resonators themselves, due to the pressure difference created by the "Pitot" effect through the lateral holes 11b of the conveying conduit 11, from being partially emptied of the gas contained therein, thus reducing the effectiveness of the acoustic damping.
  • means 16 for thermally insulating the internal delivery pipe 8 are provided, able to reduce the exchange of heat between the delivery pipe 8 itself heated internally by the compressed gas, and the gas present within the case 2 which in turn conditions, albeit to a limited extent, the temperature of the intake gas from the cylinder of the compressor 3 through the direct conveyance conduit 11.
  • the invention attains important advantages.
  • the direct conveyance conduit minimising the route of the intake gas between the external intake pipe and the inlet port in the head of the compressor, allows to minimise heat transfer from the internal space of the case 2 to the intake gas itself and, thus, to maintain the temperature low.
  • the use of the expansion plenum on the intake line externally to the case of the motor-driven compressor allows to contribute to the reduction of the noise of the intake gas preventing the latter, upstream of the inlet port in the compressor head, from having to pass through the tortuous path of a traditional intake plenum constituted by one or more acoustic resonators.
  • the acoustic resonators are branched off with respect to the direct conveyance conduit and therefore the flow of the intake gas does not undergo the head losses and the heat exchanges that take place, on the contrary, in the prior art.
  • the thermal insulation of the internal delivery pipe contributes to maintain lower the temperature of the gas that stays in the sealed case and, thus, further to reduce thermal exchanges with the intake gas through the direct conveyance conduit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP99830102A 1999-02-26 1999-02-26 Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération Expired - Lifetime EP1031728B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ES99830102T ES2155728T3 (es) 1999-02-26 1999-02-26 Compresor alternativo accionado por motor, hermeticamente cerrado, en particular para aparatos de refrigeracion.
SI9930003T SI1031728T1 (fr) 1999-02-26 1999-02-26
DK99830102T DK1031728T3 (da) 1999-02-26 1999-02-26 Hermetisk forseglet motordrevet fortrængningskompressor, især til køleapparater
EP99830102A EP1031728B1 (fr) 1999-02-26 1999-02-26 Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération
DE69900051T DE69900051T2 (de) 1999-02-26 1999-02-26 Hermetischer Motor-Verdrängerkompressor, insbesondere für Kältegerät
AT99830102T ATE198926T1 (de) 1999-02-26 1999-02-26 Hermetischer motor-verdrängerkompressor, insbesondere für kältegerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99830102A EP1031728B1 (fr) 1999-02-26 1999-02-26 Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération

Publications (2)

Publication Number Publication Date
EP1031728A1 true EP1031728A1 (fr) 2000-08-30
EP1031728B1 EP1031728B1 (fr) 2001-01-24

Family

ID=8243291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99830102A Expired - Lifetime EP1031728B1 (fr) 1999-02-26 1999-02-26 Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération

Country Status (6)

Country Link
EP (1) EP1031728B1 (fr)
AT (1) ATE198926T1 (fr)
DE (1) DE69900051T2 (fr)
DK (1) DK1031728T3 (fr)
ES (1) ES2155728T3 (fr)
SI (1) SI1031728T1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1017347C2 (nl) * 2000-02-17 2001-09-13 Lg Electronics Inc Pulsbuiskoelinrichting.
DE10114327A1 (de) * 2001-03-23 2002-09-26 Danfoss Compressors Gmbh Saugschalldämpfer
WO2007017820A1 (fr) * 2005-08-05 2007-02-15 Arcelik Anonim Sirketi Compresseur
WO2021030893A1 (fr) * 2019-08-16 2021-02-25 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda. Compresseur alternatif hermétique
US11493032B2 (en) 2015-12-21 2022-11-08 Secop Gmbh Encapsulated refrigerant compressor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10317459B4 (de) * 2003-04-16 2005-04-21 Danfoss Compressors Gmbh Kältemittelkompressor
DE10323381B3 (de) * 2003-05-23 2005-03-03 Danfoss A/S Kältemittelverdichter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643567A1 (de) * 1986-01-10 1987-07-16 Necchi Spa Schalldaempfer fuer hermetisch gekapselte kompressoren
EP0551713A1 (fr) * 1992-01-13 1993-07-21 Copeland Corporation Silencieux de décharge pour compresseur de réfrigération
US5451727A (en) * 1992-12-21 1995-09-19 Goldstar Co., Ltd. Noise suppressing apparatus for hermetic reciprocating compressor
WO1997043546A1 (fr) * 1996-05-10 1997-11-20 Empresa Brasileira De Compressores S/A. - Embraco Systeme d'aspiration pour compresseur hermetique a mouvement alternatif

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643567A1 (de) * 1986-01-10 1987-07-16 Necchi Spa Schalldaempfer fuer hermetisch gekapselte kompressoren
EP0551713A1 (fr) * 1992-01-13 1993-07-21 Copeland Corporation Silencieux de décharge pour compresseur de réfrigération
US5451727A (en) * 1992-12-21 1995-09-19 Goldstar Co., Ltd. Noise suppressing apparatus for hermetic reciprocating compressor
WO1997043546A1 (fr) * 1996-05-10 1997-11-20 Empresa Brasileira De Compressores S/A. - Embraco Systeme d'aspiration pour compresseur hermetique a mouvement alternatif

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1017347C2 (nl) * 2000-02-17 2001-09-13 Lg Electronics Inc Pulsbuiskoelinrichting.
US6467276B2 (en) 2000-02-17 2002-10-22 Lg Electronics Inc. Pulse tube refrigerator
DE10114327A1 (de) * 2001-03-23 2002-09-26 Danfoss Compressors Gmbh Saugschalldämpfer
DE10114327C2 (de) * 2001-03-23 2003-07-03 Danfoss Compressors Gmbh Saugschalldämpfer
US6715582B2 (en) 2001-03-23 2004-04-06 Danfoss Compressors Gmbh Suction muffler
WO2007017820A1 (fr) * 2005-08-05 2007-02-15 Arcelik Anonim Sirketi Compresseur
US11493032B2 (en) 2015-12-21 2022-11-08 Secop Gmbh Encapsulated refrigerant compressor
US11795930B2 (en) 2015-12-21 2023-10-24 Secop Gmbh Encapsulated refrigerant compressor
WO2021030893A1 (fr) * 2019-08-16 2021-02-25 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda. Compresseur alternatif hermétique

Also Published As

Publication number Publication date
SI1031728T1 (fr) 2001-08-31
DE69900051T2 (de) 2001-06-21
DK1031728T3 (da) 2001-06-05
DE69900051D1 (de) 2001-03-01
ATE198926T1 (de) 2001-02-15
EP1031728B1 (fr) 2001-01-24
ES2155728T3 (es) 2001-05-16

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