WO2008003157A1 - Acoustic muffler for a refrigeration compressor - Google Patents
Acoustic muffler for a refrigeration compressor Download PDFInfo
- Publication number
- WO2008003157A1 WO2008003157A1 PCT/BR2007/000177 BR2007000177W WO2008003157A1 WO 2008003157 A1 WO2008003157 A1 WO 2008003157A1 BR 2007000177 W BR2007000177 W BR 2007000177W WO 2008003157 A1 WO2008003157 A1 WO 2008003157A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- muffler
- gas
- impurity filter
- acoustic
- set forth
- Prior art date
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
-
- 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
- F04B39/0027—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
- F04B39/16—Filtration; Moisture separation
Definitions
- the present invention refers, in a general way, to a construction of an acoustic muffler for a hermetic refrigeration compressor, of the type which retains particulate material contained in the gas flow admitted in the suction of the compressor.
- Hermetic compressors of refrigeration systems usually have their suction provided with an acoustic muffler
- acoustic filter or suction muffler located in the interior of the shell and which conducts the gas from the suction line to the suction valve.
- Such component has several functions that are important to the adequate operation of the compressor, such as: gas conduction, acoustic dampening and, in some cases, thermal insulation of the gas that is drawn to the interior of the cylinder.
- Suction acoustic mufflers are generally constructed to create a trajectory for the refrigerant gas flow that is admitted in a compression chamber of the refrigeration compressor, from a suction line of a refrigeration system to which the compressor is coupled, so that the displacement of said refrigerant gas flow generates minimum noise.
- the hermetic compressors utilized in refrigeration systems suffer damages in their internal components due to the entry of solid particles therewithin.
- Such particles are originated in the refrigeration circuit and arise as a function of inefficient cleaning or by contamination during the several phases of manufacturing the components and of assembling the refrigeration systems. These particles penetrate in the compressors carried by the refrigerant gas flow.
- Hard solid particles, such as chips from machining processes can provoke damages to the suction valve to the point of breaking it, making the compressor inoperative.
- Even flexible solid particles, such as cloth fibers can adhere to the surface of the suction valve or discharge valve, impairing the complete closing thereof, reducing the efficiency of the compressor.
- FIG. 1 shows an example of a known construction of flat impurity filter. Its function is to retain solid particles, preventing them from reaching the suction valve.
- Figure 2 shows the application of said known prior art impurity filter in distinct positions in the suction muffler.
- a characteristic inherent to the utilization of the filters manufactured from wire meshes is the load loss caused to the refrigerant gas flow. This load loss occurs due to the resistance suffered by the gas flow as a function of the significant reduction of the passage area through the impurity filter, besides the aerodynamic friction existing between the refrigerant gas and the metallic wires of the mesh.
- the characteristics described above significantly affect the project of the suction system components in compressors, mainly when it is necessary to apply an impurity filter in very narrow regions, such as in one of the gas inlet or outlet ducts of the suction muffler, as shown in the illustrated example, or also in passages defined therewithin for communication between its inner chambers, in case the suction muffler presents two or more inner chambers.
- the reduced passage area which is inherent to the impurity filter, requires the provision of antechambers in narrow regions, to make feasible the application of a larger impurity filter, providing the required passage for the refrigerant gas flow. This requirement results in more complex projects and greater difficulty to manufacture the component parts of a respective impurity filter.
- the alternative to avoid the restriction to the gas flow being suctioned is to increase the diameter or the passage area, respectively.
- This alternative provokes degradation of the acoustic performance of the suction muffler, since a larger diameter of any of the gas inlet or outlet ducts, or a larger area in a passage between the volumes of the suction muffler results in less restriction to the acoustic energy originated by the compression operation of the refrigerant gas and which follows a path that is opposite to the flow of said refrigerant gas .
- a more specific object of the present invention is to provide a muffler as cited above, which does not require modifications in the constructive aspects of said suction muffler.
- Another object of the present invention is to provide a muffler of the type cited above and which is easy to obtain and has a low cost . Disclosure of the Invention
- Figures 1 and Ia schematically represent a front view and a lateral view, respectively, of an impurity filter construction for an acoustic muffler, constructed according to the prior art;
- Figure 2 schematically represents a partial view of the refrigerant gas inlet region in a refrigeration compressor, particularly illustrating the suction muffler with the arrangement of impurity filters, which are constructed according to the prior art and as illustrated in figures 1 and Ia, and also indicating the direction of the refrigerant gas flow admitted in the compression chamber;
- the present invention provides an acoustic muffler to be mounted in the interior of a hermetic shell 1 of a refrigeration compressor comprising a motor-compressor including a cylinder 2, which houses a piston 3 that reciprocates inside a compression chamber 4 defined within said cylinder 2 between a top portion of said piston 3 and a valve plate 5 seated on an end portion of the cylinder 2.
- the compressor also carries an electric motor (not illustrated) that drives said piston 3 in suction and compression strokes of a refrigerant gas of a refrigeration system to which the compressor is coupled, said refrigerant gas being admitted in the interior of the compression chamber 4, from a suction line of the refrigeration system to which the compressor is coupled and which comprises a suction inlet tube 6 disposed through the shell 1 and opened to the interior of the suction muffler.
- the valve plate 5 defines a suction orifice 5a and a discharge orifice
- the acoustic muffler comprises: a hollow body 10 defining at least one muffler chamber 11; a gas inlet duct 20 having an inlet opening 21 external to the muffler chamber 11; and an outlet opening 22, in the interior of the muffler chamber 11 and a gas outlet duct 30, presenting an inlet opening 31 inside the muffler chamber 11 and an outlet opening 32 outside said muffler chamber 11.
- the acoustic muffler receives the refrigerant gas arriving from the suction inlet tube 6, through the inlet opening 21 of the gas inlet duct 20 of said suction muffler, and directs said refrigerant gas to the interior of the compression chamber 4, through the outlet opening 32 of the gas outlet duct 30 of said suction muffler.
- the outlet opening 32 of the gas outlet duct 30 directs the refrigerant gas directly to the interior of said compression chamber 4.
- the prior art acoustic mufflers present one, two or more impurity filters arranged in gas passages through the interior of said acoustic muffler, from the inlet to the outlet thereof.
- acoustic muffler In the prior art acoustic muffler illustrated in figure 2, it presents a first flat impurity filter 7, provided in a gas passage P defined in the gas inlet duct 20, adjacent to its inlet opening 21, and a second impurity filter 8, provided in a gas passage P defined adjacent to the outlet opening 32 of the gas outlet duct 30 of the hollow body 10 of said acoustic muffler.
- a first flat impurity filter 7 provided in a gas passage P defined in the gas inlet duct 20, adjacent to its inlet opening 21, and a second impurity filter 8, provided in a gas passage P defined adjacent to the outlet opening 32 of the gas outlet duct 30 of the hollow body 10 of said acoustic muffler.
- the present invention establishes a solution to overcome the difficulties related to the utilization of a flat impurity filter, of the type used in the prior art constructions, but which also uses a wire mesh.
- at least one of the parts defined by the hollow body 10, by the gas inlet duct 20 and by the gas outlet duct 30 defines a gas passage P in which is provided an impurity filter 40, constructed according to the present invention and which has the form of a mesh presenting a mesh surface 41, substantially larger than that defined by the contour of the cross section of the gas passage P and projecting to at least one of the sides of a plane containing said cross-section of the gas passage P.
- the present invention utilizes a concept of a volumetric and metallic impurity filter 40, which has its mesh surface 41 shaped to present a three- dimensional geometric form which can vary according to the contour conditions of the place where the impurity filter 40 will be installed.
- Said impurity filters can be provided in any part of the acoustic muffler, along the path followed by the refrigerant gas inside said acoustic muffler, upstream the suction valve.
- the mesh surface 41 of the impurity filter 40 presents a tubular shape having an end 42 with a contour coinciding with that of the cross-section of the gas passage P, and an opposite closed end 43 which, in the illustrated construction, is defined by a mesh portion in the form of a substantially spherical cap.
- the opposite end 43 can have any shape, such as rectilinear and disposed parallel or inclined in relation to the plane containing the cross-section of the gas passage P.
- the end 42 of the mesh surface 41 defines a peripheral edge for mounting the impurity filter 40 to the gas passage P in which it is provided, and from which projects, for example, towards the passage of the refrigerant gas flow, the remainder of said mesh surface 41, in order to occupy a certain volume of the part to which said impurity filter 40 projects.
- At least one of the inlet and outlet openings 21, 22, 31, 32 of each of the gas inlet duct 20 and gas outlet duct 30 carries at least one respective impurity filter 40 constructed according to the present invention.
- impurity filter 40 constructed according to the present invention.
- other solutions for positioning the impurity filters in the gas passages P of the acoustic muffler are possible, in which some of said gas passages P carry an impurity filter of conventional construction and/or an impurity filter 40 constructed according to the present invention.
- the gas inlet duct 20 comprises an impurity filter 40 provided adjacent to the inlet opening 21, for example, in the outer edge portion thereof, whilst the gas outlet duct 30 comprises an impurity filter 40 provided adjacent to the respective outlet opening 32.
- the acoustic muffler can carry only one impurity filter 40, for example, in the gas inlet 31 of the gas outlet duct 30.
- the present invention can be also applied to gas discharge acoustic mufflers.
- the construction of the impurity filter 40 of the present invention has as an advantage the gain of the passage area for the refrigerant gas, without requiring to increase the filtering orifices of the wire mesh utilized in the manufacture of said impurity filter 40, or to increase the dimensions of the region where said impurity filter 40 is mounted in the acoustic muffler, to compensate for load loss effects.
- the surface area of the impurity filter 40 of the present invention is significantly larger than the surface area of the known prior art flat impurity filters, permitting to compensate for load loss effects caused by the reduction of the passage area in the impurity filters with a planar surface.
- the impurity filter 40 is affixed to the gas passage P in which it is provided, through a fixation means 50 which, according to a way of carrying out of the present invention, is in the form of a deformed peripheral portion of the gas passage P, in the region of the end 42 of the impurity filter 40 in which the latter is affixed.
- the gas passage P which receives and affixes the impurity filter 40, is provided with axial or radial projections, which are deformed, for example, by heating, after the impurity filter 40 is placed and affixed in the respective gas passage P.
- the fixation means 50 comprises at least one retaining projection 51, provided in one of the parts of gas inlet duct 20 and gas outlet duct 30, and to be seated on an adjacent portion of the end 42 of the impurity filter 40, said retaining projection 51 being plastically deformed at the end 42 of the impurity filter 40, for example, by thermal deformation.
- the gas inlet opening 21 of the gas inlet duct 20 and/or the gas inlet 31 of the gas outlet duct 30 is provided with a plurality of retaining projections 51, to the seated, by thermal deformation, on an adjacent portion of the end 42 of the impurity filter 40.
- portions of the peripheral contour of said gas passage P in the region of the acoustic muffler are shaped so as to overlap an adjacent portion of the end 42 of the impurity filter 40.
- the deformation is carried out upstream the gas passage P.
- the deformation of a portion of the contour of said gas passage P should secure an adjacent end portion of the contour of each said impurity filter mounted in the gas passage P, affixing said filters to each other and against the adjacent wall portion of the acoustic muffler where the gas passage P is defined.
- acoustic muffler presenting an impurity filter 40 in the gas inlet duct 20 and in the outlet gas duct 30 has been illustrated, it should be understood that said acoustic muffler can present only one impurity filter 40, for example, in the gas inlet 31 of the gas outlet duct 30.
- the present invention has been described and illustrated for an acoustic muffler having its hollow body 10 internally defining only one muffler chamber 11, it should be understood that, in the case of an acoustic muffler having two or more muffler chambers, the dividing wall thereof presenting a gas passage P can secure an impurity filter constructed according to the prior art or to the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800255884A CN101484701B (en) | 2006-07-06 | 2007-07-05 | Acoustic muffler for a refrigeration compressor |
EP07763807A EP2038552A1 (en) | 2006-07-06 | 2007-07-05 | Acoustic muffler for a refrigeration compressor |
JP2009516830A JP2009542949A (en) | 2006-07-06 | 2007-07-05 | Acoustic muffler for cooling compressor |
US12/305,271 US20100006371A1 (en) | 2006-07-06 | 2007-07-05 | Acoustic muffler for a refrigeration compressor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0602962-0 | 2006-07-06 | ||
BRPI0602962-0A BRPI0602962A (en) | 2006-07-06 | 2006-07-06 | acoustic damper for refrigeration compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008003157A1 true WO2008003157A1 (en) | 2008-01-10 |
Family
ID=38689924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2007/000177 WO2008003157A1 (en) | 2006-07-06 | 2007-07-05 | Acoustic muffler for a refrigeration compressor |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100006371A1 (en) |
EP (1) | EP2038552A1 (en) |
JP (1) | JP2009542949A (en) |
KR (1) | KR20090024773A (en) |
CN (1) | CN101484701B (en) |
BR (1) | BRPI0602962A (en) |
WO (1) | WO2008003157A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102778016A (en) * | 2012-04-24 | 2012-11-14 | 广东美的暖通设备有限公司 | Filter with silencing function and air conditioner using such filter |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101709903B (en) * | 2009-12-30 | 2012-06-27 | 宁波奥克斯空调有限公司 | Air conditioner muffler |
JP5988155B2 (en) * | 2011-12-15 | 2016-09-07 | 株式会社リコー | Waste liquid treatment equipment |
KR102201629B1 (en) * | 2014-06-26 | 2021-01-12 | 엘지전자 주식회사 | A linear compressor and a refrigerator including the same |
JP6919874B2 (en) | 2016-12-19 | 2021-08-18 | グエン チー カンパニー リミテッド | Air compressor |
US20200049142A1 (en) * | 2018-08-10 | 2020-02-13 | Quincy Compressor Llc | Noise reducing silencer with spiral chambers for a compressor |
CN108419412B (en) * | 2018-02-08 | 2020-01-14 | 惠州汉旭五金塑胶科技有限公司 | Water-cooling row with impurity filtering function |
US11608820B2 (en) * | 2018-08-28 | 2023-03-21 | Quincy Compressor Llc | Belt guard comprising a compressor silencer |
WO2021019639A1 (en) * | 2019-07-29 | 2021-02-04 | 三菱電機株式会社 | Compressor and refrigeration cycle device |
JP2021173210A (en) * | 2020-04-24 | 2021-11-01 | 株式会社日立産機システム | Air-cooled package type gas compressor |
CN114353395B (en) * | 2020-09-28 | 2023-10-24 | 青岛海尔电冰箱有限公司 | Refrigerating system, refrigerating equipment with refrigerating system and noise reduction method of refrigerating system |
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US3715010A (en) * | 1972-02-02 | 1973-02-06 | S Gibel | Multiple collimator muffler |
EP0386320A1 (en) * | 1989-03-08 | 1990-09-12 | Tecumseh Products Company | Suction line connector for hermetic compressor |
EP0594431A2 (en) * | 1992-10-23 | 1994-04-27 | Matsushita Refrigeration Company | Refrigerant compressor and refrigeration system incorporating same |
US6176093B1 (en) * | 1999-09-15 | 2001-01-23 | Airsept, Inc. | Automotive air conditioning refrigerant filter and method |
US6220050B1 (en) * | 1998-11-24 | 2001-04-24 | Tecumseh Products Company | Suction accumulator |
US20040005225A1 (en) * | 2002-07-02 | 2004-01-08 | Marshall Steven Edwin | Resistive suction muffler for refrigerant compressors |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR8602173A (en) * | 1986-05-02 | 1987-12-22 | Brasil Compressores Sa | IMPROVEMENT IN A HERMETIC COOLING COMPRESSOR SUCTION SYSTEM |
CN2071262U (en) * | 1990-08-31 | 1991-02-13 | 垢玉彩 | Suction filter |
KR940003845Y1 (en) * | 1991-12-28 | 1994-06-15 | 주식회사 금성사 | Compressor |
JP2000265960A (en) * | 1999-03-15 | 2000-09-26 | Toyota Autom Loom Works Ltd | Fluid machine |
DE10114327C2 (en) * | 2001-03-23 | 2003-07-03 | Danfoss Compressors Gmbh | suction silencer |
CN1279868C (en) * | 2003-08-26 | 2006-10-18 | 苏州金莱克清洁器具有限公司 | Dust-collector noise silencer |
JP4367918B2 (en) * | 2004-01-09 | 2009-11-18 | 本田技研工業株式会社 | Small engine exhaust system |
CN2682226Y (en) * | 2004-02-12 | 2005-03-02 | 复盛易利达(上海)压缩机有限公司 | Air intake filter |
-
2006
- 2006-07-06 BR BRPI0602962-0A patent/BRPI0602962A/en not_active IP Right Cessation
-
2007
- 2007-07-05 WO PCT/BR2007/000177 patent/WO2008003157A1/en active Application Filing
- 2007-07-05 KR KR1020097000001A patent/KR20090024773A/en not_active Application Discontinuation
- 2007-07-05 EP EP07763807A patent/EP2038552A1/en not_active Withdrawn
- 2007-07-05 JP JP2009516830A patent/JP2009542949A/en not_active Withdrawn
- 2007-07-05 US US12/305,271 patent/US20100006371A1/en not_active Abandoned
- 2007-07-05 CN CN2007800255884A patent/CN101484701B/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3715010A (en) * | 1972-02-02 | 1973-02-06 | S Gibel | Multiple collimator muffler |
EP0386320A1 (en) * | 1989-03-08 | 1990-09-12 | Tecumseh Products Company | Suction line connector for hermetic compressor |
EP0594431A2 (en) * | 1992-10-23 | 1994-04-27 | Matsushita Refrigeration Company | Refrigerant compressor and refrigeration system incorporating same |
US6220050B1 (en) * | 1998-11-24 | 2001-04-24 | Tecumseh Products Company | Suction accumulator |
US6176093B1 (en) * | 1999-09-15 | 2001-01-23 | Airsept, Inc. | Automotive air conditioning refrigerant filter and method |
US20040005225A1 (en) * | 2002-07-02 | 2004-01-08 | Marshall Steven Edwin | Resistive suction muffler for refrigerant compressors |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102778016A (en) * | 2012-04-24 | 2012-11-14 | 广东美的暖通设备有限公司 | Filter with silencing function and air conditioner using such filter |
Also Published As
Publication number | Publication date |
---|---|
CN101484701A (en) | 2009-07-15 |
US20100006371A1 (en) | 2010-01-14 |
CN101484701B (en) | 2012-05-02 |
JP2009542949A (en) | 2009-12-03 |
EP2038552A1 (en) | 2009-03-25 |
BRPI0602962A (en) | 2008-02-26 |
KR20090024773A (en) | 2009-03-09 |
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