CN100414102C - Refrigerant compressor - Google Patents
Refrigerant compressor Download PDFInfo
- Publication number
- CN100414102C CN100414102C CNB2004100457422A CN200410045742A CN100414102C CN 100414102 C CN100414102 C CN 100414102C CN B2004100457422 A CNB2004100457422 A CN B2004100457422A CN 200410045742 A CN200410045742 A CN 200410045742A CN 100414102 C CN100414102 C CN 100414102C
- Authority
- CN
- China
- Prior art keywords
- compressor
- silencing apparatus
- foamed plastics
- housing
- shell
- 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.)
- Expired - Fee Related
Links
Images
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
- F04B39/0072—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes characterised by assembly or mounting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention concerns a refrigerant compressor with a motor, a compressor driven by the motor, and a muffling device having at least one muffler with a housing. It is endeavoured to reduce the thermal influence of suction gas in the refrigerant compressor. For this purpose, it is ensured that the housing has at least one outer wall, which is made of a foamed plastic.
Description
Technical field
The present invention relates to a kind of coolant compressor, it has a motor, a compressor and by motor driven has at least one silencer of being with the silencing apparatus of housing.
Background technique
This coolant compressor for example sees among patent DE 195 16 811 C2.Here, motor and compressor are arranged in a shell with a suction silencing apparatus.In other words, related is a kind of coolant compressor of sealing, has proved in the several years in past that it is very valuable.
Utilize this compressor, come the refrigerant gas of from evaporator drier to be inhaled into, in compressor, compress, then by a discharge nozzle discharging that is connected with a vibrations silencing apparatus in many cases in order to the temperature that increases refrigerant gas.In this Placement, it is cold more that refrigerant sucks gas, and the efficient of compressor is just high more.Yet the temperature that refrigerant sucks gas increased before entering compressor, because refrigerant gas is exposed under the atmosphere environment that heats a little of enclosure.
In order to remedy this problem at least in part, patent US 4,371, and 319 suggestions are in the compressor of sealing, and cylinder head, pressure silencing apparatus and pressure piping should provide a separation layer that is positioned at enclosure.Yet this process cost is expensive and need take sizable space of enclosure.
Summary of the invention
Of the present invention based on task be to reduce to sucking the heat affecting of gas in the coolant compressor.
The coolant compressor that utilization is mentioned in foreword, this task is solved, this coolant compressor has a motor, a compressor and by motor driven has at least one silencer of being with the silencing apparatus of housing, it is characterized in that, described housing has at least one outer wall of being made by foamed plastics, and the size in the hole of described foamed plastics is positioned at 5 to 50 microns scope.
Utilize this embodiment, realized improvement, and need not to add in addition separation layer the hot isolated instances of the environment of the gas that enters silencing apparatus.Housing self can be realized isolating.Because the outer wall of housing is made by foamed plastics, it provides good buffer action.When silencing apparatus is used as the suction silencing apparatus, suck gas and keep colder, in other words, it can not heated by the domination temperature in the shell.When silencing apparatus was arranged to be positioned at the pressure at compressor outlet place or vibrations silencing apparatus, the outer wall of the housing of being made by foamed plastics also can provide hot buffer action, so that make the heat from the refrigerant gas that heated can not be passed in the environment.Can also utilize this point to be used as preventing that heat undesirably is passed to the measure that refrigerant sucks gas.Certainly, same, foamed plastics can not realize that heat is isolated completely, and in other words, heat will flow out by outer wall.Yet, to compare with the used wall of making by block plastics so far, hot-fluid will reduce greatly, therefore makes the heat affecting that sucks gas also is minimized.Making at least one outer wall of being made by foamed plastics will only can be slightly or do not increase the manufacture cost of silencing apparatus.Yet on the other hand, the efficient that provides the compressor of silencing apparatus is increased, the therefore very fast cost that can balance may increase.
Preferably, all outer walls are all made by foamed plastics.This can improve gas in the silencing apparatus to the hot isolated instances of environment.In addition, can realize the quite significant eliminated noise effect in part.Foamed plastics can have than the better eliminated noise performance of block plastics, because the shock transfer of being undertaken by block plastics is more than being undertaken more directly by foamed plastics.Suppose that the bubble that comprises in the foamed plastics has hindered noise and seen through.Therefore, the housing all made by foamed plastics of its all outer walls just provides two advantages.
Housing is preferably made by foamed plastics.This has simplified manufacture process.Equally, when chamber, bar or other element of making a monoblock with other housing parts in manufacture process are provided in the housing, can use foamed plastics.Like this, utilize described element, foamed plastics also can obtain in enclosure interior.The result obtains a kind of housing that the used material by basic homogeneity of silencing apparatus is made that sucks.Like this, for example because stress crack corrosion and that the danger of fatigue phenomenon takes place is just smaller along with the material conversion.
Preferably, the connecting line between silencing apparatus and the compressor is made by foamed plastics.Equally, connecting line plays the purposes with gas and the isolation of environment heat.This chance is present on the one hand and sucks in being connected between silencing apparatus and the compressor.In this case, can avoid sucking gas is heated.On the other hand, this possibility also was present in being connected of compressor and pressure silencing apparatus.In this case, can prevent that heat is passed to the environment from connecting line.
Preferably, silencing apparatus is arranged in a shell, and motor and/or compressor also are arranged in this shell.In this case, use the silencing apparatus advantageous particularly of making by foamed plastics wholly or in part.As mentioned above, the temperature that can obtain raising usually in the shell of sealing can cause that in compression process the refrigerant gas temperature raises because therein refrigerant gas is carried out compressor for compressing.Temperature after this rising can be radiated to enclosure.When suction silencing apparatus that present use is particularly made by foamed plastics, the refrigerant gas that is sucked keeps efficient cold and compressor to improve.
Connecting line between shell and the silencing apparatus is preferably made by foamed plastics.Like this, heat transmit with regard to can not be correspondingly path between the outlet of inlet by shell and the path between the silencing apparatus or silencing apparatus and shell carry out.
Preferably, foamed plastics is foam PBT.PBT is verified to be highly suitable in the cryogen circuit.Now, can use same material basically, and it need only completely or partially be made and gets final product by foaming in manufacture process or before making by foam PBT with the housing that guarantees silencing apparatus.
Preferably, the size in the hole of foamed plastics is positioned at 5 to 50 microns scope.Like this, related have only very little hole, and they are much smaller than the size of " conventional type " PBT foam.Utilize so little hole, can obtain very high mechanical strength, so the size of the wall of silencing apparatus can keep inconvenience more or less.Yet the increase a little on the thickness is also also harmless.The foam PBT of aperture can be from Trexel like this, Inc., and Woburn, MA, USA company has bought, and its name is called " MuCell ".
Description of drawings
Hereinafter, present invention is described according to a preferred embodiment in conjunction with the accompanying drawings for the general, wherein:
Fig. 1 shows the schematic cross sectional views of coolant compressor;
Fig. 2 shows one and sucks silencing apparatus, and the part illustrates with front elevation.
Embodiment
Coolant compressor 1 shown in Fig. 1 has a motor 2 that is driving a compressor 3.Motor 2 has a stator 4 and a rotor 5.Rotor 5 is connected with one 6, and this 6 is driving the piston 8 that is arranged in a cylinder 9 by a crankshaft arrangement 7.Cylinder 9 is by a cylinder head 10 sealings, and a plurality of valves are placed in one according to known mode own, and these valves are being controlled respectively and utilized refrigerant gas to fill the operation of the pressing chamber in the cylinder 9, the perhaps operation that refrigerant gas is given off from pressing chamber.
Above-mentioned parts are closed in the shell 11, and this shell 11 is sealing motor 2 and compressor 3.The outside of shell provides an electronic connecting apparatus 12, and it has a controller if necessary, and this controller is according to predetermined value, for example refrigeration requirement of refrigerator, and controlling the working condition of motor 2, be not shown specifically at this.Device 12 utilizes the line 13 that passes the shell guiding to be connected with motor 2.
The vaporizer that refrigerant gas is not shown specifically from figure by an inlet nozzle 14 feeds to and sucks silencing apparatus 15.Sucking silencing apparatus 15 is connected with cylinder head 10 by a pipeline 16 (Fig. 2).According to the mode that is not shown specifically among the figure, cylinder head 10 is connected with pressure silencing apparatus 17 by a pressure line, and the pressure silencing apparatus gives off from shell 11 by the refrigerant gas that discharge nozzle 18 will compress and heat.
Be formed with an anechoic room 28 in the inside of housing 22.One pipe 29 that forms gas pipeline 30 is arranged in anechoic room, and the refrigerant gas shell flows to outlet 32 by this gas pipeline 30 from the inlet 31 that sucks silencing apparatus 15.Present embodiment just is elected to be example.Certainly suck silencing apparatus 15 according to the different modes design.
The housing 22 that sucks silencing apparatus 15 is made by foamed plastics.Pipe 29 is also made by foamed plastics.Foamed plastics is the foam PBT (polybutylene terephthalate) that has the equally distributed hole of its size in 5 to 50 microns scope.This material for example can be from Trexel, Inc., and Woburn, MA, USA company has bought, and its name is called " MuCell ".It is characterized in that having than hole dimension scope is 250 microns the much smaller hole of conventional type foam PBT.
The advantage that this foam PBT (or another kind of foamed plastics) has is only may significantly reduce to the heat transmission that refrigerant suction gas carries out from the atmosphere that occupies shell 11 inside.Therefore, refrigerant gas can not be subjected to further heating in shell 11 inside.On the other hand, the advantage of utilizing foamed plastics to make to suck silencing apparatus 15 to have is by flowing and vibrations gas can be eliminated better sucking the inner noise that takes place of silencing apparatus.Therefore, foamed plastics forms a kind of acoustic muffler.
Foamed plastics can for example be made as follows, by the nitrogen under the high pressure or carbon dioxide are fed to molten polymer in extrusion press or the injection moulding apparatus as supercritical fluid, suddenly reduce pressure then, the housing that sucks silencing apparatus 15 subsequently can be made according in fact conventional mode.Utilize this manufacture method, can adopt so far for sucking the included selected wall thickness of parts of silencing apparatus according to almost constant form.Little dimensional changes is not remarkable.
Certainly, pressure silencing apparatus 17 also can be made by foamed plastics.In this case, foamed plastics can prevent to carry out heat transmission from the environment of refrigerant gas to shell 11 inside by the compression process heating.This can also reduce the heat affecting that refrigerant is sucked gas.
The refrigerant gas that enters compressor 3 is cold more, and the efficient of compressor is just high more.Therefore, utilize foamed plastics to raise the efficiency.
Claims (7)
1. coolant compressor, have silencer that a motor, a compressor and by motor driven have the silencing apparatus of at least one band housing, it is characterized in that, described housing (22) has the outer wall that at least one is made by foamed plastics, and the size in the hole of described foamed plastics is positioned at 5 to 50 microns scope.
2. compressor according to claim 1 is characterized in that, all outer walls of described housing are all made by foamed plastics.
3. compressor according to claim 1 is characterized in that, described housing (22) is made by foamed plastics.
4. according to each described compressor in the claim 1 to 3, it is characterized in that the connecting line (16) between silencing apparatus (15) and the compressor (3) is made by foamed plastics.
5. according to each described compressor in the claim 1 to 3, it is characterized in that silencing apparatus (15) is arranged in a shell (11), motor (2) and/or compressor (3) also are positioned at wherein.
6. compressor according to claim 5 is characterized in that, the connecting line (19) between shell (11) and the silencing apparatus (15) is made by foamed plastics.
7. according to each described compressor in the claim 1 to 3, it is characterized in that foamed plastics is the foam polybutylene terephthalate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10323527.2 | 2003-05-24 | ||
| DE10323527A DE10323527B4 (en) | 2003-05-24 | 2003-05-24 | Refrigerant compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1573100A CN1573100A (en) | 2005-02-02 |
| CN100414102C true CN100414102C (en) | 2008-08-27 |
Family
ID=33482132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100457422A Expired - Fee Related CN100414102C (en) | 2003-05-24 | 2004-05-24 | Refrigerant compressor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20050002798A1 (en) |
| CN (1) | CN100414102C (en) |
| DE (1) | DE10323527B4 (en) |
| IT (1) | ITTO20040327A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434697C (en) * | 2003-10-10 | 2008-11-19 | 松下电器产业株式会社 | Hermetic compressor and manufacturing method of suction muffler |
| JP2005133707A (en) * | 2003-10-10 | 2005-05-26 | Matsushita Electric Ind Co Ltd | Enclosed compressor |
| WO2005073558A1 (en) * | 2004-01-29 | 2005-08-11 | Acc Austria Gmbh | Refrigerant compressor |
| CN101230853B (en) * | 2007-01-25 | 2010-08-25 | 黄石东贝电器股份有限公司 | Compressor capable of directly gettering through impacting air suction port by spring |
| DE102007059299A1 (en) | 2007-05-16 | 2008-11-20 | Entex Rust & Mitschke Gmbh | Device for processing products to be degassed |
| DE102008014328B4 (en) * | 2008-03-14 | 2015-01-29 | Secop Gmbh | Suction muffler for a hermetically sealed refrigerant compressor |
| DE102011108372A1 (en) * | 2011-07-22 | 2013-01-24 | Volkswagen Aktiengesellschaft | Soundproofing in a refrigerant circuit |
| KR101854933B1 (en) * | 2013-04-24 | 2018-05-04 | 엘지전자 주식회사 | Muffler for compressor and compressor having the same |
| EP3126674B1 (en) * | 2014-03-31 | 2019-08-07 | Arçelik Anonim Sirketi | Thermally insulative inner lining for use in an exhaust silencer of a hermetic reciprocating compressor |
| AT14711U1 (en) * | 2014-12-12 | 2016-04-15 | Secop Austria Gmbh | SUCTION SILENCER FOR A HERMETICALLY CAPACITATED REFRIGERANT COMPRESSOR |
| US10662948B2 (en) * | 2017-06-13 | 2020-05-26 | HELLA GmbH & Co. KGaA | Expansion chamber for a brake boost vacuum pump |
| CN111287939A (en) * | 2018-12-10 | 2020-06-16 | 安徽美芝制冷设备有限公司 | Suction and exhaust silencer assembly of compressor, compressor and refrigerator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304044A (en) * | 1990-03-06 | 1994-04-19 | Matsushita Refrigeration Company | Hermetic compressor |
| JPH09280188A (en) * | 1996-04-15 | 1997-10-28 | Toshiba Corp | Rotary compressor |
| CN1084850C (en) * | 1995-04-24 | 2002-05-15 | 亚瑞亚·勃朗勃威力有限公司 | Filter muffler |
| CN1400986A (en) * | 2000-10-18 | 2003-03-05 | 三井化学株式会社 | Foam of thermoplastic urethane elastomer composition and process for producing the foam |
| CN1109196C (en) * | 1996-08-21 | 2003-05-21 | 巴西船用压缩机有限公司 | Suction muffler for hermetic compressor |
| WO2005035983A1 (en) * | 2003-10-10 | 2005-04-21 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor and manufacturing method of suction muffler |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3375212A (en) * | 1967-02-14 | 1968-03-26 | Du Pont | Microcellular polymeric structure |
| US3772221A (en) * | 1972-01-12 | 1973-11-13 | Quaker Oats Co | Preparation of polyurethane foams and microcellular elastomers with integral skins using a combination of tetraalkylguanidine and an organomercury compound |
| US3885892A (en) * | 1973-05-29 | 1975-05-27 | Black & Decker Mfg Co | Housing assembly for air compressor and the like |
| US4446853A (en) * | 1977-06-06 | 1984-05-08 | Adcock Thomas P | Solar collector panel |
| JPS5614877A (en) * | 1979-07-13 | 1981-02-13 | Hitachi Ltd | Closed type motor compressor |
| US4370104A (en) * | 1980-07-22 | 1983-01-25 | White Consolidated Industries, Inc. | Suction muffler for refrigeration compressor |
| US4473665A (en) * | 1982-07-30 | 1984-09-25 | Massachusetts Institute Of Technology | Microcellular closed cell foams and their method of manufacture |
| BR8602173A (en) * | 1986-05-02 | 1987-12-22 | Brasil Compressores Sa | IMPROVEMENT IN A HERMETIC COOLING COMPRESSOR SUCTION SYSTEM |
| US5300178A (en) * | 1990-02-06 | 1994-04-05 | Soltech Inc. | Insulation arrangement for machinery |
| BR9102288A (en) * | 1991-05-28 | 1993-01-05 | Brasileira S A Embraco Empresa | SUCTION DIFFERENT SET FOR HERMETIC COMPRESSOR |
| US5272285A (en) * | 1992-08-20 | 1993-12-21 | Scott Mfg., Inc. | Sound attenuating machinery cover |
| US5499908A (en) * | 1992-09-30 | 1996-03-19 | Tecumseh Products Company | Method of making foam in an energy efficient compressor |
| US5504281A (en) * | 1994-01-21 | 1996-04-02 | Minnesota Mining And Manufacturing Company | Perforated acoustical attenuators |
| US5997258A (en) * | 1994-05-31 | 1999-12-07 | Bristol Compressors, Inc. | Low noise refrigerant compressor having closed shells and sound absorbing spacers |
| KR0143142B1 (en) * | 1995-03-07 | 1998-08-01 | 김광호 | Cylinder apparatus for on reciprocating canpressor |
| DE19516811C2 (en) * | 1995-05-08 | 1998-04-09 | Danfoss Compressors Gmbh | Refrigerant compressor |
| US6524080B2 (en) * | 2000-04-11 | 2003-02-25 | R. K. Dewan & Co. | Hermetically sealed compressors |
| US6558137B2 (en) * | 2000-12-01 | 2003-05-06 | Tecumseh Products Company | Reciprocating piston compressor having improved noise attenuation |
| US6705268B2 (en) * | 2001-09-21 | 2004-03-16 | Basf Aktiengesellschaft | Engine noise barrier |
-
2003
- 2003-05-24 DE DE10323527A patent/DE10323527B4/en not_active Expired - Fee Related
-
2004
- 2004-05-13 US US10/845,310 patent/US20050002798A1/en not_active Abandoned
- 2004-05-17 IT IT000327A patent/ITTO20040327A1/en unknown
- 2004-05-24 CN CNB2004100457422A patent/CN100414102C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304044A (en) * | 1990-03-06 | 1994-04-19 | Matsushita Refrigeration Company | Hermetic compressor |
| CN1084850C (en) * | 1995-04-24 | 2002-05-15 | 亚瑞亚·勃朗勃威力有限公司 | Filter muffler |
| JPH09280188A (en) * | 1996-04-15 | 1997-10-28 | Toshiba Corp | Rotary compressor |
| CN1109196C (en) * | 1996-08-21 | 2003-05-21 | 巴西船用压缩机有限公司 | Suction muffler for hermetic compressor |
| CN1400986A (en) * | 2000-10-18 | 2003-03-05 | 三井化学株式会社 | Foam of thermoplastic urethane elastomer composition and process for producing the foam |
| CN1234756C (en) * | 2000-10-18 | 2006-01-04 | 三井化学株式会社 | Foam of thermoplastic urethane elastomer composition and process for producing the foam |
| WO2005035983A1 (en) * | 2003-10-10 | 2005-04-21 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor and manufacturing method of suction muffler |
Also Published As
| Publication number | Publication date |
|---|---|
| US20050002798A1 (en) | 2005-01-06 |
| CN1573100A (en) | 2005-02-02 |
| ITTO20040327A1 (en) | 2004-08-17 |
| DE10323527A1 (en) | 2004-12-30 |
| DE10323527B4 (en) | 2009-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100414102C (en) | Refrigerant compressor | |
| US8257061B2 (en) | Hermetic compressor with internal thermal insulation | |
| KR101363170B1 (en) | Motor-driven compressor | |
| KR100821796B1 (en) | Hermetic compressor | |
| CA2373725A1 (en) | Ejector cycle system | |
| WO2012166051A1 (en) | A valve plate for a compressor | |
| CN1074814C (en) | Suction arrangement for reciprocating hermetic compressor | |
| US20090155114A1 (en) | Compressor structure for a refrigeration system | |
| CN1089406C (en) | Suction arrangement for reciprocating hermetic compressor | |
| CN106460817B (en) | For thermal insulation neck bush used in the exhaust silencer in hermetic reciprocating compressor | |
| KR20120112084A (en) | Motor-driven compressor | |
| CN207454272U (en) | Compressor and refrigeration system | |
| CN207920868U (en) | Compressor and refrigeration equipment | |
| CN100549416C (en) | Compressor | |
| JP2012154213A (en) | Scroll compressor | |
| JP2005344654A (en) | Compressor | |
| CN219101586U (en) | Compressor | |
| EP1718869B1 (en) | A refrigerant compressor | |
| EP4194695A1 (en) | A hermetic compressor with improved vibration tube assembly | |
| JPH0599141A (en) | Closed type motor-operated compressor | |
| JP2848418B2 (en) | Hermetic electric compressor | |
| KR20070025726A (en) | Refrigerator | |
| CN107489623A (en) | Compressor and refrigeration system | |
| CN118208393A (en) | Muffler for refrigeration compressor | |
| KR20140036401A (en) | Rear housing for compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DANFOSS FLENSBURG GMBH Free format text: FORMER NAME: DANFOSS COMPRESSORS GMBH Owner name: DANFOSS HOUSEHOLD COMPRESSORS GMBH Free format text: FORMER NAME: DANFOSS FLENSBURG GMBH Owner name: SIKEPU CO., LTD. Free format text: FORMER NAME: DANFOSS HOUSEHOLD COMPRESSORS GMBH |
|
| CP01 | Change in the name or title of a patent holder |
Address after: The Federal Republic of Germany in Flensburg Patentee after: Danfoss Flensburg Co.,Ltd. Address before: The Federal Republic of Germany in Flensburg Patentee before: Danfoss Compressors GmbH Address after: Germany Flensburg Patentee after: DANFOSS COMPRESSORS GmbH Address before: Germany Flensburg Patentee before: Danforth home compressors Ltd. |
|
| CP03 | Change of name, title or address |
Address after: Germany Flensburg Patentee after: Danforth home compressors Ltd. Address before: The Federal Republic of Germany in Flensburg Patentee before: Danfoss Flensburg Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |