US20180347555A1 - Hermetic Compressor - Google Patents

Hermetic Compressor Download PDF

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Publication number
US20180347555A1
US20180347555A1 US15/835,855 US201715835855A US2018347555A1 US 20180347555 A1 US20180347555 A1 US 20180347555A1 US 201715835855 A US201715835855 A US 201715835855A US 2018347555 A1 US2018347555 A1 US 2018347555A1
Authority
US
United States
Prior art keywords
expansion chamber
fluid expansion
airtight housing
hermetic compressor
inner face
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.)
Abandoned
Application number
US15/835,855
Other languages
English (en)
Inventor
Marcos Giovani Dropa De Bortoli
Rodrigo Kremer
Moises Alves De Oliveira
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.)
Nidec Global Appliance Compressores e Solucoes em Refrigeracao Ltda
Original Assignee
Whirlpool SA
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 Whirlpool SA filed Critical Whirlpool SA
Assigned to WHIRLPOOL S.A. reassignment WHIRLPOOL S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DE BORTOLI, MARCOS GIOVANI DROPA, DE OLIVEIRA, MOISES ALVES, KREMER, RODRIGO
Publication of US20180347555A1 publication Critical patent/US20180347555A1/en
Assigned to EMBRACO - INDÚSTRIA DE COMPRESSORES E SOLUÇÕES EM REFRIGERAÇÃO LTDA. reassignment EMBRACO - INDÚSTRIA DE COMPRESSORES E SOLUÇÕES EM REFRIGERAÇÃO LTDA. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WHIRLPOOL S.A.
Abandoned 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
    • F04B39/121—Casings
    • 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
    • F04B39/0027—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
    • 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 invention in question relates to a hermetic compressor, and, more particularly, a hermetic compressor provided with at least one fluid expansion chamber, that is, a pulsation attenuating chamber that can be used in the discharge line (discharge muffler) or in the suction line (suction muffler).
  • a hermetic compressor provided with at least one fluid expansion chamber, that is, a pulsation attenuating chamber that can be used in the discharge line (discharge muffler) or in the suction line (suction muffler).
  • the hermetic compressor disclosed herein is distinguished in that it comprises an airtight housing and at least an additional wall section, wherein the volume defined between the airtight housing and the additional wall section ends up defining said fluid expansion chamber.
  • hermetic compressors especially those comprised of positive displacement compression mechanisms, include, among other components, discharge expansion chambers (also referred to as “discharge mufflers”) and suction expansion chambers (also referred to as “suction muffler”).
  • discharge mufflers also referred to as “discharge mufflers”
  • suction expansion chambers also referred to as “suction muffler”.
  • the fluid expansion chambers have the general function of attenuating the pulsations of the useful fluid, being that the functional principles which governs the passive operation of the fluid expansion chambers are widely known to professionals and theoreticians in the area of acoustics, besides being particularly detailed in specialized technical literature.
  • the current state of the art comprises an infinity of models and constructions of fluid expansion chambers used in hermetic compressors.
  • the volume of the discharge expansion chamber is defined by a hollow modular body arranged, in a non-anchored manner, within the airtight housing of the hermetic compressor.
  • the fluid communication between the compression mechanism head, the hollow modular body and the discharge duct is performed by a rigid metal tubing.
  • an expansion chamber is arranged within the airtight housing generates at least three drawbacks, one from the thermal point of view, the other from the dimensional point of view, and the third relating to aspects of reliability.
  • the discharge expansion chamber is arranged in an environment (within the airtight housing), whose temperature is lower than the temperature of the discharge fluid, that is, the temperature outside the discharge expansion chamber is less than its within temperature. Consequently, the internal environment of the housing of the compressor (suction fluid) suffers severe thermal exchange, after all, its temperature is pejoratively influenced by the temperature of the circulating discharge fluid through the discharge expansion chamber. As a consequence, there is an increase in the suction temperature of the compressor and, in this way, reducing the volumetric efficiency and, hence, the energy efficiency thereof.
  • the discharge expansion chamber occupies a useful volume which could otherwise be suppressed in order to enable the miniaturization of the hermetic compressor housing, which currently is unlikely.
  • Another benefit of reducing internal compressor volume is related to the application of high pressure useful refrigerants, such as CO 2 , as well as flammable, wherein the compressors fall into the category of pressure vessel safety, and the internal volume defines the criticality of the damage.
  • compressors with smaller internal volumes are advantageous for this type of application.
  • a hermetic compressor provided with at least one fluid expansion chamber, whose useful volume is narrowly defined between a section of one of the faces (inner or outer) of the airtight housing of the compressor and at least one wall section adjacently attached to one of the faces of the airtight housing of the compressor.
  • the general concept of a fluid expansion chamber whose useful volume is narrowly defined between a section of one of the faces (inner or outer) of the airtight housing of the compressor and at least a wall section adjacently attached to one of the faces of the airtight housing of the compressor can be used both as a discharge muffler and a suction muffler.
  • the hermetic compressor disclosed herein which comprises an airtight housing, at least one reciprocating compression mechanism arranged within the airtight housing and at least one fluid expansion chamber.
  • Said fluid expansion chamber is formed between one of the faces of the airtight housing and the inner face of a first modular body, hermetically attached to one of the faces of the airtight housing and comprises at least one inlet path and at least one outlet path.
  • the fluid expansion chamber may comprise a discharge fluid expansion chamber (discharge muffler) or a suction fluid expansion chamber (suction muffler).
  • the fluid expansion chamber may be external (formed between the outer face of the airtight housing and the inner face of a first modular body hermetically attached to the outer face of the airtight housing) and/or internal (formed between the inner face of the airtight housing and the inner face of a first modular body hermetically attached to the inner face of the airtight housing).
  • the inlet path and the outlet path of the fluid expansion chamber can be fluidly aligned or misaligned.
  • the hermetic compressor disclosed herein further comprises at least one second fluid expansion chamber fluidly connected, in series, to the “main” fluid expansion chamber.
  • the second fluid expansion chamber is internal, being arranged within the airtight housing and may be formed, at least partially, between the inner face of the airtight housing and the inner face of a second modular body or be formed, at least partially, between the outer face of the first modular body and the inner face of a second modular body.
  • the second fluid expansion chamber is external, being arranged on the exterior of the airtight housing and may be formed, at least partially, between the outer face of the airtight housing and the inner face of a second modular body or be formed, at least partially, between the outer face of the first modular body and the inner face of a second modular body.
  • FIGS. 1A and 1B illustrate, in a schematic form, the most basic and simplified embodiments of the invention in question
  • FIGS. 2A, 2B, 2C and 2D illustrate, in a schematic form, possible embodiments of the optional embodiment of the invention in question.
  • FIG. 3 illustrates, in a schematic form, another possible embodiment of the optional embodiment of the invention in question.
  • such invention has the potential to optimize the internal volume of the compressor, in addition to reducing the emission of heat within the housing, promoting greater energy efficiency.
  • such invention simplifies the overall manufacturing process of the compressor, after all, traditional brazing processes are replaced by faster and less expensive welding processes.
  • the hermetic compressor treated herein is a traditional hermetic compressor, and, of course, certain details not relevant for the understanding of the invention in question have been omitted and/or deleted. It is again emphasized that omission or deletion of these details (components that integrate the compression or the damping mechanisms, for example) does not prejudice the full understanding of the invention in question.
  • FIGS. 1A and 1B The invention in question, in its inventive core, is illustrated in FIGS. 1A and 1B .
  • the hermetic compressor disclosed herein comprises an airtight housing and a fluid expansion chamber, being that the great inventive merit of the invention in question consists in the fact that said fluid expansion chamber—rather than being detached and conformed in itself, as it happens in the current state of the art—is formed between one of the faces of the airtight housing and the inner face of a first modular body hermetically attached to one of the faces of the airtight housing.
  • said fluid expansion chamber ( 2 ) is external to the airtight housing ( 1 ), being formed between the outer face ( 12 ) of the airtight housing ( 1 ) and the inner face ( 31 ) of the first modular body ( 3 ), which is, in turn, hermetically attached to the same outer face ( 12 ) of the airtight housing ( 1 ). It is further noted that, such as illustrated, said fluid expansion chamber ( 2 ) is a discharge fluid expansion chamber.
  • said fluid expansion chamber ( 2 ) is internal to the airtight housing ( 1 ), being formed between the inner face ( 11 ) of the airtight housing ( 1 ) and the inner face ( 31 ) of the first modular body ( 3 ), which is, in turn, hermetically attached to the same inner face ( 11 ) of the airtight housing ( 1 ). It is further noted that, such as illustrated, said fluid expansion chamber ( 2 ) is a suction fluid expansion chamber.
  • the fluid expansion chamber ( 2 ) comprises at least one inlet path ( 21 ) and at least one outlet path ( 22 ).
  • the inlet path ( 21 ) is related to a fluidic communication means (tube or mere through-hole, to give only two examples) which, bypassing the airtight housing ( 1 ), connects its internal environment to the volume of the fluid expansion chamber ( 2 ).
  • the outlet path ( 22 ) is related to a fluid communication means (discharge duct tube, to give only one example) able to allow the connection between the hermetic compressor and the discharge line of an external system (not illustrated), such as, for example, a cooling system.
  • the inlet path ( 21 ) is related to a fluidic communication means (suction duct tube, to give only one example) which, bypassing the airtight housing ( 1 ), is able to allow the connection between the suction line of an external system (not illustrated), such as, for example, a cooling system and the hermetic compressor.
  • the outlet path ( 22 ) is related to a fluidic communication means (tube or mere through-hole, to give only two examples) capable of connecting the volume of the fluid expansion chamber ( 2 ) to the internal environment of the compressor or to the cylinder of the compression mechanism (not illustrated).
  • the first modular body ( 3 ) is preferably made of metal alloy and attached to one of the faces ( 11 and 12 ) of the airtight housing ( 1 ), preferably by means of welding. None prevents the modular body from being manufactured with other types of materials, such as polymeric, that the fixing is of alternative forms, such as, for example, glue.
  • the invention in question does not intentionally address thermal and acoustic issues, it is worth emphasizing that the general, dimensional and structural format of the first modular body ( 3 ), as well as the general features of the fastening medium, must respect the features of acoustics of each project.
  • the inlet path ( 21 ) and the outlet path ( 22 ) of the fluid expansion chamber ( 2 ) can be arranged in a fluidly aligned manner or in a fluidly misaligned manner.
  • FIGS. 2A, 2B, 2C and 2D Optional embodiments of the invention in question, in accordance with the inventive core described above, are illustrated in FIGS. 2A, 2B, 2C and 2D .
  • said fluid expansion chamber ( 2 ) (internal or external to the airtight housing ( 1 ), formed between one of the faces ( 11 and 12 ) of the airtight housing ( 1 ) and the inner face ( 31 ) of a first modular body ( 3 ) hermetically attached to one of the faces ( 11 and 12 ) of the airtight housing ( 1 )) and the existence of at least one second fluid expansion chamber ( 4 ) fluidly connected, in series, to the fluid expansion chamber ( 2 ).
  • the fluid expansion chambers ( 2 and 4 ) can conform a volume-in-series for discharge fluid or a volume-in-series for suction fluid.
  • the formation of the second fluid expansion chamber ( 4 ) always has a second modular body ( 5 ), which, also in general lines, is substantially analogous to the first modular body ( 3 ).
  • the formatting of the second fluid expansion chamber ( 4 ), always employing the second modular body ( 5 ), can be varied, some examples being illustrated in cited FIGS. 2A, 2B, 2C and 2D .
  • the fluid expansion chamber ( 2 ) and the second fluid expansion chamber ( 4 ) are both external and, preferably, dedicated to the discharge fluid.
  • the second fluid expansion chamber ( 4 ) is formed only between the outer face ( 32 ) of the first modular body ( 3 ) and the inner face ( 51 ) of a second modular body ( 5 ).
  • the fluid expansion chamber ( 2 ) and the second fluid expansion chamber ( 4 ) are both internal and, preferably, dedicated to the suction fluid.
  • the second fluid expansion chamber ( 4 ) is formed between the outer face ( 32 ) of the first modular body ( 3 ), the inner face ( 11 ) of the airtight housing ( 1 ) and the inner face ( 51 ) of a second modular body ( 5 ).
  • the fluid expansion chamber ( 2 ) and the second fluid expansion chamber ( 4 ) are both external and, preferably, dedicated to the discharge fluid.
  • the second fluid expansion chamber ( 4 ) is formed between the outer face ( 32 ) of the first modular body ( 3 ), the outer face ( 12 ) of the airtight housing ( 1 ) and the inner face ( 51 ) of a second modular body ( 5 ).
  • the fluid expansion chamber ( 2 ) and the second fluid expansion chamber ( 4 ) are both internal and, preferably, dedicated to the suction fluid.
  • the second fluid expansion chamber ( 4 ) is formed only between the inner face ( 11 ) of the airtight housing ( 1 ) and the inner face ( 51 ) of a second modular body ( 5 ).
  • the fluid expansion chamber ( 4 ) comprises an outlet path ( 6 ), which is directed to a fluidic communication means (traditional tube, mere through-hole or through-tube, to give only three examples).
  • a fluidic communication means traditional tube, mere through-hole or through-tube, to give only three examples.
  • the “inlet path” of said fluid expansion chamber ( 4 ) always ends up being defined by the outlet path ( 22 ) of the fluid expansion chamber ( 2 ).
  • the optional embodiment illustrated in FIG. 3 provides for the use of two fluid expansion chambers, fluidly connected, in series, one of these chambers being internally arranged (in relation to the housing of the compressor) and the other of these chambers externally arranged (in relation to the housing of the compressor).
  • a hermetic compressor comprising an airtight housing ( 1 ), a first fluid expansion chamber ( 2 ) and a second fluid expansion chamber ( 4 ), such chambers being fluidly connected, in series, defining a volume-in-series for discharge fluid (it may of course also define a volume-in-series for suction fluid).
  • the first fluid expansion chamber ( 2 ) is specially formed only between the inner face ( 11 ) of the airtight housing ( 1 ) and the inner face ( 31 ) of a first modular body ( 3 ) hermetically attached to the inner face ( 11 ) of the airtight housing ( 1 ), while the second fluid expansion chamber ( 4 ) is specially formed only between the outer face ( 12 ) of the airtight housing ( 1 ) and the inner face ( 31 ) of a first modular body ( 3 ) hermetically attached to the outer face ( 12 ) of the airtight housing ( 1 ).
  • the fluid connection between the volumes occurs in an analogous manner to the constructions and options illustrated in FIGS. 2A, 2B, 2C and 2D .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
US15/835,855 2016-12-19 2017-12-08 Hermetic Compressor Abandoned US20180347555A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102016029873.3 2016-12-19
BR102016029873A BR102016029873A2 (pt) 2016-12-19 2016-12-19 compressor hermético

Publications (1)

Publication Number Publication Date
US20180347555A1 true US20180347555A1 (en) 2018-12-06

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US15/835,855 Abandoned US20180347555A1 (en) 2016-12-19 2017-12-08 Hermetic Compressor

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US (1) US20180347555A1 (enrdf_load_stackoverflow)
JP (1) JP2018100665A (enrdf_load_stackoverflow)
CN (1) CN108204353B (enrdf_load_stackoverflow)
BR (1) BR102016029873A2 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170321692A1 (en) * 2016-05-03 2017-11-09 Lg Electronics Inc. Linear compressor
US20190107312A1 (en) * 2017-10-11 2019-04-11 Lg Electronics Inc. Linear compressor
WO2020141015A1 (de) * 2018-12-31 2020-07-09 Gea Bock Gmbh Verdichter
US10982663B2 (en) * 2017-05-30 2021-04-20 Ulvac, Inc. Vacuum pump
US11542933B2 (en) * 2019-04-29 2023-01-03 Gast Manufacturing, Inc. Sound reduction device for rocking piston pumps and compressors

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110107481A (zh) * 2019-06-26 2019-08-09 黄石东贝电器股份有限公司 一种降低噪音提高性能的壳体及压缩机
BR102019027370A2 (pt) 2019-12-19 2021-06-29 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda. Tampa de cilindro de compressor alternativo
CN115143076B (zh) * 2021-03-31 2023-09-12 安徽美芝制冷设备有限公司 吸气消音器、压缩机和家用电器

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170321692A1 (en) * 2016-05-03 2017-11-09 Lg Electronics Inc. Linear compressor
US10670004B2 (en) * 2016-05-03 2020-06-02 Lg Electronics Inc. Linear compressor
US10982663B2 (en) * 2017-05-30 2021-04-20 Ulvac, Inc. Vacuum pump
US20190107312A1 (en) * 2017-10-11 2019-04-11 Lg Electronics Inc. Linear compressor
US11193700B2 (en) * 2017-10-11 2021-12-07 Lg Electronics Inc. Linear compressor with heat shield between discharge cover and frame
WO2020141015A1 (de) * 2018-12-31 2020-07-09 Gea Bock Gmbh Verdichter
US11542933B2 (en) * 2019-04-29 2023-01-03 Gast Manufacturing, Inc. Sound reduction device for rocking piston pumps and compressors

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JP2018100665A (ja) 2018-06-28
CN108204353A (zh) 2018-06-26
CN108204353B (zh) 2021-12-17
BR102016029873A2 (pt) 2018-07-17

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