WO2021030893A1 - Compresseur alternatif hermétique - Google Patents

Compresseur alternatif hermétique Download PDF

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Publication number
WO2021030893A1
WO2021030893A1 PCT/BR2020/050323 BR2020050323W WO2021030893A1 WO 2021030893 A1 WO2021030893 A1 WO 2021030893A1 BR 2020050323 W BR2020050323 W BR 2020050323W WO 2021030893 A1 WO2021030893 A1 WO 2021030893A1
Authority
WO
WIPO (PCT)
Prior art keywords
acoustic
suction
reciprocating compressor
hermetic
hermetic reciprocating
Prior art date
Application number
PCT/BR2020/050323
Other languages
English (en)
Portuguese (pt)
Inventor
Dietmar Erich Bernhard Lilie
Rodrigo Kremer
Sergio Koerich Lohn
Original Assignee
Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda.
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 Indústria De Compressores E Soluções Em Refrigeração Ltda. filed Critical Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda.
Publication of WO2021030893A1 publication Critical patent/WO2021030893A1/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

Definitions

  • the present invention relates to a hermetic reciprocating compressor and, more particularly, a hermetic reciprocating compressor which, suitable for use in a refrigeration system, comprises at least one acoustic suction filter specially designed to optimize thermal dynamics of the refrigerant fluid suction flow.
  • hermetic reciprocating compressors when used in refrigeration systems, have the fundamental objective of compressing refrigerant fluid that will flow through a hydraulic circuit fundamentally integrated by at least one condenser, at least one expansion and at least one evaporator.
  • acoustic suction filters which are responsible for attenuating the pulsations of the refrigerant fluid that is sucked into the compression cylinder.
  • the current state of the art comprises a plurality of constructions and models of acoustic suction filters. It is worth mentioning that, as a rule, the well-known acoustic suction filters are designed to optimize the acoustic attenuation related to the pulsation of the refrigerant suction.
  • the suction filter inlet is arranged, in a non-hermetic way, close to the suction duct of the carcass airtight, and the suction filter outlet is arranged on the head of the compression cylinder.
  • the refrigerant fluid sucked by the hermetic reciprocating compressor flows, simultaneously and not directed, into the hermetic housing of the hermetic reciprocating compressor and into the acoustic suction filter.
  • the refrigerant fluid that flows through the acoustic suction filter ends up mixing previously with the heated fluid that fills the interior of the housing, increasing the temperature of the refrigerant fluid admitted to the cylinder.
  • the refrigerant fluid sucked by the compression cylinder has a temperature higher than the temperature of the suction fluid directly from the suction duct.
  • the higher the temperature of the refrigerant fluid sucked by the compression cylinder the smaller the amount of compressed and pumped mass will be, reducing the cooling capacity and consequently the efficiency of the compressor.
  • the patent document BR1020140296590 for example, an acoustic suction filter that, among other constructive details, is integrated by a nozzle that comprises at least a section of section divergent in relation to the main flow of the flow, being said section of divergent section located between the fluid inlet area and the fluid directing area.
  • this acoustic filter ensures that the compression mechanism works mainly with the refrigerant fluid from the evaporator, which is colder than the working fluid accumulated inside the environment defined by the hermetic housing of the compressor.
  • the hermetic reciprocating compressor comprises an internal arrangement capable of avoiding the overheating of the refrigerant fluid in the path it takes from the evaporation line to the compression cylinder.
  • the hermetic reciprocating compressor which comprises at least one airtight housing provided with at least one suction duct adapted to be fluidly connected to at least one evaporation line of a refrigeration system, at least one acoustic suction filter provided with at least one inlet, at least one acoustic muffling chamber and at least one exit path, and at least one compression mechanism integrated by at least one electric motor, at least one compression cylinder and at least one movable piston, said movable piston being coupled to the electric motor and able to develop alternative movement inside the compression cylinder.
  • said hermetic reciprocating compressor further comprises at least one pipe arranged between the outlet of the acoustic suction filter and the suction duct of the hermetic housing, said pipe being able to conduct part of the refrigerant fluid from the evaporation line to the outlet of the acoustic suction filter.
  • Figure 1 illustrates, in schematic section, a first embodiment of part of the internal arrangement of the hermetic reciprocating compressor, according to the invention in question;
  • Figure 2 illustrates, in schematic section, a second embodiment of part of the internal arrangement of the hermetic reciprocating compressor, according to the invention in question.
  • a hermetic reciprocating compressor which comprises certain characteristics capable of minimizing the thermal influence between the refrigerant fluid that fills the hermetic housing and the refrigerant fluid directly from the evaporation line.
  • hermetic reciprocating compressor described here comprises a compression mechanism integrated by an electric motor, a compression cylinder and a movable piston, the said movable piston being coupled to the electric motor and able to develop alternative movement inside the compression cylinder. It is reiterated that general notions of the functional principle and basic and necessary constructions of hermetic reciprocating compressors are largely supported by the current state of the art, which can be represented, even, by didactic bibliography related to the field of application now treated.
  • the hermetic reciprocating compressor comprises an airtight housing 2 provided with a suction duct 21 adapted to be fluidly connected to a line of return of evaporator 4 from a cooling system (not shown).
  • said hermetic reciprocating compressor further comprises an acoustic suction filter 1 provided with an inlet 11, an acoustic muffler 12 and an outlet 15.
  • a pipe 3 is also provided between the outlet path 15 of the acoustic suction filter 1 and the suction duct 21 of the hermetic housing 2.
  • the pipe 3 penetrates the acoustic filter of suction 1 through its inlet 11.
  • said piping 3 is capable of conducting the refrigerant fluid 5 from the line of the evaporator return line 4 to the outlet path 15 of the acoustic suction filter 1.
  • the pipe 3 can be made of material whose thermal conductivity is less than 1.5 watt per meter kelvin (W / Km).
  • said tubing 3 is, in addition to being disposed inside the inlet 11, disposed inside the outlet duct 14 of the acoustic suction filter 1.
  • the end of the tubing 3 cooperating with the suction duct 21 of the hermetic housing 2 comprises an external diameter less than or equal to the internal diameter of the suction duct 21 of the hermetic housing2.
  • the relationship between these two diameters, defined in the project, contributes to the increase of the thermal insulation between the suction duct and the refrigerant fluid inside the tube 3.
  • the segment of the 3d pipe placed inside the track inlet 11 of the acoustic suction filter l comprises an external diameter less than or equal to the internal diameter of the inlet 11 of the acoustic suction filter 1.
  • the relationship between these two diameters, defined in design allows to control the flow of refrigerant between the acoustic chamber 12 of the suction acoustic filter 1 and the interior of the airtight housing 2, and also control the noise of the compressor.
  • the end of the pipe 3 cooperating with the outlet path 15 of the acoustic suction filter 1 comprises an external diameter less than or equal to the internal diameter of the outlet path 15 of the acoustic suction filter 1
  • the relationship between these two diameters, defined in the project allows to control the flow of refrigerant fluid from the evaporation line 4 which flows directly to the valve / suction orifice (not shown) and which flows into the acoustic muffling chamber 12 of the acoustic suction filter 1, also allowing to control the pressure pulsation in the suction line 4

Landscapes

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

Abstract

La présente invention concerne un compresseur alternatif hermétique comprenant un filtre acoustique d'aspiration spécialement conçu pour optimiser la dynamique thermique du flux d'aspiration du fluide frigorigène. Ledit filtre acoustique d'aspiration comprend au moins une tubulure disposée entre la voie de sortie du filtre acoustique d'aspiration et le passage d'aspiration du boîtier hermétique, cette tubulure étant apte à conduire le fluide frigorigène provenant de la ligne d'évaporation vers la voie de sortie du filtre acoustique d'aspiration.
PCT/BR2020/050323 2019-08-16 2020-08-14 Compresseur alternatif hermétique WO2021030893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102019017124-3A BR102019017124A2 (pt) 2019-08-16 2019-08-16 compressor alternativo hermético
BRBR1020190171243 2019-08-16

Publications (1)

Publication Number Publication Date
WO2021030893A1 true WO2021030893A1 (fr) 2021-02-25

Family

ID=73037647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2020/050323 WO2021030893A1 (fr) 2019-08-16 2020-08-14 Compresseur alternatif hermétique

Country Status (2)

Country Link
BR (1) BR102019017124A2 (fr)
WO (1) WO2021030893A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031728A1 (fr) * 1999-02-26 2000-08-30 Necchi Compressori S.p.A. Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération
WO2003038280A1 (fr) * 2001-10-29 2003-05-08 Empresa Brasileira De Compressores S/A Embraco Silencieux d'aspiration pour compresseur hermetique a piston
WO2006011082A1 (fr) * 2004-07-23 2006-02-02 Arcelik Anonim Sirketi Compresseur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031728A1 (fr) * 1999-02-26 2000-08-30 Necchi Compressori S.p.A. Motocompresseur hermetique alternatif, en particulier pour appareil de réfrigération
WO2003038280A1 (fr) * 2001-10-29 2003-05-08 Empresa Brasileira De Compressores S/A Embraco Silencieux d'aspiration pour compresseur hermetique a piston
WO2006011082A1 (fr) * 2004-07-23 2006-02-02 Arcelik Anonim Sirketi Compresseur

Also Published As

Publication number Publication date
BR102019017124A2 (pt) 2021-03-02

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