EP0976993A2 - Motorverdichter für Kältegerät und Kältegerät mit solchem Motorverdichter - Google Patents

Motorverdichter für Kältegerät und Kältegerät mit solchem Motorverdichter Download PDF

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Publication number
EP0976993A2
EP0976993A2 EP99114603A EP99114603A EP0976993A2 EP 0976993 A2 EP0976993 A2 EP 0976993A2 EP 99114603 A EP99114603 A EP 99114603A EP 99114603 A EP99114603 A EP 99114603A EP 0976993 A2 EP0976993 A2 EP 0976993A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
cooling
refrigerating apparatus
compressor
circuit
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.)
Withdrawn
Application number
EP99114603A
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English (en)
French (fr)
Other versions
EP0976993A3 (de
Inventor
Vittorio Bianchi
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 EP0976993A2 publication Critical patent/EP0976993A2/de
Publication of EP0976993A3 publication Critical patent/EP0976993A3/de
Withdrawn legal-status Critical Current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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/064—Cooling by a cooling jacket in the pump casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor

Definitions

  • the present invention relates to a reciprocating motor compressor for refrigerating apparatus according to the preamble of Claim 1.
  • the invention has been developed for application to refrigerating apparatus and domestic freezers and for air conditioners which include a small motor compressor, but is not limited to these applications.
  • the object of the invention is that of increasing the efficiency of the compressor in a refrigerating apparatus of the type considered.
  • the invention essentially lies in the idea of cooling the cylinder of the compressor.
  • the heat extracted by the cooling circuit causes a reduction in the temperature in the compressor with a consequent increase in the density of the aspirated refrigerant fluid.
  • the invention also relates to refrigerating apparatus which includes a motor compressor as claimed.
  • the cylinder cooling circuit is a closed independent circuit which contains a heat exchange liquid which is cooled by passing it through a heat exchanger outside the compressor.
  • the cylinder cooling is achieved by directly utilising the coolant fluid pumped by the compressor, which at the end of a first condenser section of the apparatus is in the liquid phase.
  • This fluid is reintroduced into the compressor where it passes through the cylinder cooling circuit.
  • a reciprocating motor compressor for refrigerating apparatus has, in a known way, a sealed casing 10.
  • a motor compressor unit Within the casing 10 there is a motor compressor unit, generally indicated 12.
  • the electric motor of the unit 12 is indicated 14 and its compressor is generally indicated 16.
  • the compressor 16 comprises a piston 18 connected to the motor 14 by means of a crank mechanism 20.
  • the piston 18 is movable to and fro in a cylinder 22 having a valved cylinder head 24.
  • a delivery tube 26 which, in a known way, leads out of the casing 10 and, as will be seen more herein below, is directed to the condenser of a refrigerating apparatus.
  • a suction tube 28 which, passing through the space within the casing 10, also leads to the valved cylinder head 24, extends out of the casing 10 and, as will be explained in more detail below, comes from the evaporator of the refrigerator apparatus.
  • the compressor 16 is provided with coolant tubes 30 and 32 which extend out through the casing 10 to be connected to an external cylinder coolant fluid circulation circuit for the cylinder 22.
  • the reference numeral 36 designates a flange on which, by means of a seal 38, the cylinder head or valve plate 24 is fixed.
  • the wall of the cylinder 22 has a circular series of angularly equidistant blind holes 40, 40a, 40b which are parallel to the axis of the cylinder 22 and which extend adjacent to the cylinder 32 facing the cylinder head or valve plate 24 at least in the region of the compression chamber defined between the cylinder head 24 and the piston 18 ( Figure 1) of the compressor.
  • blind holes 40, 40a, 40b constitute a cooling cavity.
  • the holes 40, 40a, 40b are interconnected by communication ducts, except for the holes 40, 40a, 40b which are contiguous and which are not interconnected.
  • valve plate 24 In the region of the hole 40a the valve plate 24 has an input opening 42 to which the coolant tube 30 (or 32) ( Figure 1) is connected. In correspondence with the blind hole 40b the valve plate 24 has an outlet opening 44 to which the tube 32 (or 30) of the cooling circuit is connected.
  • the intercommunication ducts between the blind holes 40, 40a, 40b are constituted by circumferential channels 46 formed in the end face of the cylinder 22 facing the cylinder head 24 and constituted by the flange 36.
  • Each blind hole 40, 40a, 40b contains a central partition, for example as shown in the form of a flat strip 48 fitted in a diametral position in the associated blind hole.
  • the partitions 48 extend close to the bottom of the associated hole 40, 40a, 40b and subdivide the latter into an onward and a return path for the coolant fluid, which communicates with respective opposite channels 46 except in the case of the hole 40a the onward path of which starts with the inlet opening 42 and except in the case of the hole 40b the return path of which leads to the outlet opening 44.
  • the compressor cylinder is designated 122 and its cylinder head or valve plate is designated 124.
  • annular cooling cavity designated 140 which is concentric with the axis of the cylinder 122, which is formed, also in this case, from the end face which faces the cylinder head 124 and which has a blind bottom.
  • the annular cavity 140 communicates with the outside via an inlet opening 142 and an outlet opening 144.
  • the inlet opening 142 is connected to the coolant tube 30 (or 32) of Figure 1 and the outlet opening 144 is connected to the coolant tube 32 (or 30) of Figure 1.
  • the inlet opening 142 is constituted by a radial lateral hole situated in the region of the blind bottom of the cavity 140; the outlet opening 144 is constituted by a hole formed in the valve plate 144.
  • this latter contains a partition 148 which defines an indirect path for the liquid from the inlet opening 142 to the outlet opening 144.
  • the partition 148 is in the form of a helical plate fitted into the cavity 140.
  • FIG. 5 a first embodiment of refrigerating apparatus which includes a sealed compressor such as that of Figure 1, incorporating a cooled cylinder such as that of Figures 2 and 3 or that of Figure 4.
  • the apparatus of Figure 5 comprises a classic refrigerating circuit in which a condenser 50 is traversed by a serpentine tube 52 which is a continuation of the delivery tube 26 and leads, via a dryer 54 to an evaporator 56.
  • the path of the refrigerant fluid through the refrigerating apparatus is indicated by the arrows F1.
  • the cylinder 22 ( Figures 2 and 3) or 122 ( Figure 4) is cooled by means of a coolant circuit in which a heat exchange liquid circulates with an external fluid having a lower temperature, preferably with ambient air.
  • the cooling circuit for the cylinder 22 or 122 exits via the outlet tube 30 and leads to a heat exchange radiator 58 for heat exchange with the ambient air.
  • the heat exchange liquid passes through a serpentine 60 and then returns via the inlet tube 32 into the cooling cavity of the compressor cylinder.
  • the direction of circulation of the heat exchange liquid is indicated by the arrows F2.
  • the heat exchange liquid contained in the cooling circuit may be a refrigerant fluid such as that utilised in the refrigerating circuit of which the condenser 50 and evaporator 56 form part.
  • the cooling circuit of which the radiator 58 forms part is so arranged that the coolant fluid therein remains in the liquid state and at a temperature such as to produce an effective cooling of the cylinder 22 ( Figures 2 and 3) or the cylinder 122 ( Figure 4).
  • the heat exchange liquid contained in the cooling circuit may be the same lubricating oil as that contained in the sealed casing 10 ( Figure 1) for lubricating the compressor.
  • refrigerant fluid or lubricating oil as heat exchange liquid for the compressor is quite preferable in place of a liquid of different nature such as water since possible losses of liquid through the seal 38 ( Figure 3) do not risk contaminating the refrigerant fluid which circulates in the refrigerating apparatus.
  • the cooling circuit which includes the radiator 58 for exchanging heat with the ambient air is so arranged as to cause circulation of the heat exchange liquid according to the thermosiphon principle.
  • thermosiphon circulation were not sufficient a forced circulation electric pump could be interposed in the coolant circuit, as indicated by the broken outline 62 in Figure 5.
  • the pump 62 could be arranged to cause at least for a part of the time a forced circulation of the heat exchange liquid under the control of a thermostat (not shown).
  • the apparatus includes a condenser 150 through which passes a serpentine tube sub-divided into two sections 152a, 152b.
  • the first of these two sections 152a connects the delivery outlet from the cylinder by means of the delivery tube 26 to the inlet tube 30 of the cylinder cooling cavity, passing through the first section 152a of the serpentine of the condenser 150 (arrows F3 and F4); the second section 152b of the serpentine connects the outlet tube 32 from the cylinder cooling cavity of the compressor to the dryer 54 and then to the evaporator 56, passing through a second part of the condenser 150 (arrows F5 and F6).
  • the condenser 150 has been shown schematically as a unitary element in which the cooling fins, schematically represented at 154, are in common with the first and second serpentine sections 152a, 152b, but the two parts of the condenser 150 could be entirely separate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressor (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP99114603A 1998-07-27 1999-07-26 Motorverdichter für Kältegerät und Kältegerät mit solchem Motorverdichter Withdrawn EP0976993A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO980644 1998-07-27
ITTO980644 IT1303168B1 (it) 1998-07-27 1998-07-27 Motocompressore per impianti frigoriferi ed impianto frigoriferocomprendente tale motocompressore.

Publications (2)

Publication Number Publication Date
EP0976993A2 true EP0976993A2 (de) 2000-02-02
EP0976993A3 EP0976993A3 (de) 2000-03-29

Family

ID=11416951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114603A Withdrawn EP0976993A3 (de) 1998-07-27 1999-07-26 Motorverdichter für Kältegerät und Kältegerät mit solchem Motorverdichter

Country Status (2)

Country Link
EP (1) EP0976993A3 (de)
IT (1) IT1303168B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007014443A1 (en) * 2005-08-01 2007-02-08 Whirlpool S.A. Hermetic compressor with a heat dissipation system
WO2007068463A1 (de) * 2005-12-13 2007-06-21 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Wassergekühlter kolbenverdichter
EP2025937A1 (de) 2007-08-07 2009-02-18 Three Es S.r.l. Kolbenpumpe
CN103016308A (zh) * 2012-12-25 2013-04-03 四川大川压缩机有限责任公司 周向通水冷却填料
DE102009018213B4 (de) * 2009-04-21 2015-07-09 Oerlikon Leybold Vacuum Gmbh Vakuumpumpengehäuse
CN104879496A (zh) * 2015-06-08 2015-09-02 沈阳远大压缩机股份有限公司 带一圈冷却通道的填料盒
US10247464B2 (en) 2016-01-27 2019-04-02 Haier Us Appliance Solutions, Inc. Sealed system for an appliance
WO2020057826A1 (en) 2018-09-17 2020-03-26 Arcelik Anonim Sirketi A compressor comprising a suction muffler

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1157175A (en) * 1967-02-23 1969-07-02 Giovanni Borghi Improvements relating to Refrigerating Systems
US4006602A (en) * 1974-08-05 1977-02-08 Fanberg Ralph Z Refrigeration apparatus and method
US4206805A (en) * 1978-03-30 1980-06-10 Beckett Ralph R Heat recovery unit
DE3019738A1 (de) * 1980-05-23 1981-12-10 Hans Hinrich Ing.(grad.) 2241 Linden Köster Anordnung zur verbesserung der leistung von waermepumpen
US4393752A (en) * 1980-02-14 1983-07-19 Sulzer Brothers Limited Piston compressor
US5419692A (en) * 1991-01-09 1995-05-30 Kabushiki Kaisha Toshiba Closed type compressor
DE4344696A1 (de) * 1993-12-27 1995-06-29 Tam Razvojno Tehnicni Inst Zna Kühlung eines an einen Verbrennungskolbenmotorkopf angrenzenden Motorzylinderabschnitts
WO1997001033A1 (en) * 1995-06-23 1997-01-09 Lg Electronics Inc. Coolant supply apparatus for linear compressor
US5694780A (en) * 1995-12-01 1997-12-09 Alsenz; Richard H. Condensed liquid pump for compressor body cooling

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1157175A (en) * 1967-02-23 1969-07-02 Giovanni Borghi Improvements relating to Refrigerating Systems
US4006602A (en) * 1974-08-05 1977-02-08 Fanberg Ralph Z Refrigeration apparatus and method
US4206805A (en) * 1978-03-30 1980-06-10 Beckett Ralph R Heat recovery unit
US4393752A (en) * 1980-02-14 1983-07-19 Sulzer Brothers Limited Piston compressor
DE3019738A1 (de) * 1980-05-23 1981-12-10 Hans Hinrich Ing.(grad.) 2241 Linden Köster Anordnung zur verbesserung der leistung von waermepumpen
US5419692A (en) * 1991-01-09 1995-05-30 Kabushiki Kaisha Toshiba Closed type compressor
DE4344696A1 (de) * 1993-12-27 1995-06-29 Tam Razvojno Tehnicni Inst Zna Kühlung eines an einen Verbrennungskolbenmotorkopf angrenzenden Motorzylinderabschnitts
WO1997001033A1 (en) * 1995-06-23 1997-01-09 Lg Electronics Inc. Coolant supply apparatus for linear compressor
US5694780A (en) * 1995-12-01 1997-12-09 Alsenz; Richard H. Condensed liquid pump for compressor body cooling

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101258328B (zh) * 2005-08-01 2010-06-09 惠而浦股份有限公司 具有散热***的密闭压缩机
WO2007014443A1 (en) * 2005-08-01 2007-02-08 Whirlpool S.A. Hermetic compressor with a heat dissipation system
US8011900B2 (en) 2005-08-01 2011-09-06 Whirlpool S.A. Hermetic compressor with a heat dissipation system
US8117960B2 (en) 2005-12-13 2012-02-21 Knorr-Bremse Systeme Fur Nutzfahrzeuge Gmbh Water-cooled piston compressor
CN101331319B (zh) * 2005-12-13 2010-10-20 克诺尔-布里姆斯轨道车辆***有限公司 水冷却的活塞式压气机
WO2007068463A1 (de) * 2005-12-13 2007-06-21 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Wassergekühlter kolbenverdichter
EP2025937A1 (de) 2007-08-07 2009-02-18 Three Es S.r.l. Kolbenpumpe
DE102009018213B4 (de) * 2009-04-21 2015-07-09 Oerlikon Leybold Vacuum Gmbh Vakuumpumpengehäuse
CN103016308A (zh) * 2012-12-25 2013-04-03 四川大川压缩机有限责任公司 周向通水冷却填料
CN103016308B (zh) * 2012-12-25 2015-02-11 四川大川压缩机有限责任公司 周向通水冷却填料
CN104879496A (zh) * 2015-06-08 2015-09-02 沈阳远大压缩机股份有限公司 带一圈冷却通道的填料盒
CN104879496B (zh) * 2015-06-08 2017-07-07 沈阳远大压缩机有限公司 带一圈冷却通道的填料盒
US10247464B2 (en) 2016-01-27 2019-04-02 Haier Us Appliance Solutions, Inc. Sealed system for an appliance
WO2020057826A1 (en) 2018-09-17 2020-03-26 Arcelik Anonim Sirketi A compressor comprising a suction muffler

Also Published As

Publication number Publication date
EP0976993A3 (de) 2000-03-29
ITTO980644A1 (it) 2000-01-27
IT1303168B1 (it) 2000-10-30

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