US20100028182A1 - Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports - Google Patents
Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports Download PDFInfo
- Publication number
- US20100028182A1 US20100028182A1 US12/183,149 US18314908A US2010028182A1 US 20100028182 A1 US20100028182 A1 US 20100028182A1 US 18314908 A US18314908 A US 18314908A US 2010028182 A1 US2010028182 A1 US 2010028182A1
- Authority
- US
- United States
- Prior art keywords
- scroll compressor
- scroll
- permanent magnet
- magnet synchronous
- capacity
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/0085—Prime movers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
Definitions
- This application relates to a scroll compressor having a line fed permanent magnet synchronous type motor, which has a relatively constant power curve as a load changes, and wherein the scroll compressor is provided with a function to reduce capacity.
- Scroll compressors are becoming widely utilized in refrigerant compression applications.
- a pair of scroll elements each have a base and a generally spiral wrap extending from the base. The wraps interfit to define compression chambers.
- An electric motor drives a shaft, and the shaft drives one of the two scroll members to rotate relative to the other through a non-rotation coupling.
- An induction motor has been utilized.
- An induction motor has a peak efficiency at a certain load torque, above as well as below which the efficiency decreases.
- the value of reducing the capacity, which is to save energy, is somewhat lost due to the reduced efficiency.
- a scroll compressor having some way of reducing capacity is provided with a line fed permanent magnet synchronous type motor.
- the permanent magnet motor has a higher peak efficiency, and a flatter efficiency versus torque curve compared to the prior art induction motor.
- FIG. 1 is a scroll compressor incorporating the present invention.
- a scroll compressor 20 is illustrated in FIG. 1 .
- a motor stator 22 causes a motor rotor 23 to rotate.
- a shaft 24 is driven to rotate.
- Shaft 24 causes an orbiting scroll 26 to orbit relative to a non-orbiting scroll 28 , as known.
- the components as described at this point are housed within a shell 30 .
- a suction port 32 receives a suction refrigerant from a refrigerant cycle, and delivers that refrigerant to compression chambers between the orbiting scroll 26 and non-orbiting scroll 28 .
- a discharge tube 34 delivers a compressed refrigerant downstream into the refrigerant cycle.
- Bypass ports 36 communicate with the compression chambers, and may return a partially or fully compressed refrigerant to the suction pressure, such as suction tube 32 .
- a bypass line 38 incorporates a valve 40 to selectively communicate this refrigerant back to the suction port.
- any other way of communicating partially or fully compressed refrigerant back to the suction pressure may be utilized with this invention.
- other ways of modulating the capacity of the compressor would come within the scope of this invention.
- scroll compressors are known wherein a biasing force is provided behind one of the two scroll compressors. Pulse width modulation techniques may be utilized to lower that biasing force under certain conditions such that the scroll members can come away from each other and reduce the capacity.
- the scroll compressor includes a tap 100 extending through the orbiting scroll member 26 into a back pressure chamber 102 . As known, this creates a biasing force holding the orbiting scroll member 26 in contact with the non-orbiting scroll member 28 .
- the drive between the shaft 24 and the scroll compressor 26 is through a slider block arrangement 110 .
- Such arrangements allow for radial movement of the orbiting scroll 26 .
- Both the axial compliance and the radial compliance allow the reduction of capacity by allowing the wraps of the scroll members to move out of contact with each other. Techniques for providing this reduction in capacity are known. It is the use of a particular motor with such an ability to reduce capacity which is inventive here.
- This invention relates to the use of a permanent magnet synchronous motor for any scroll compressor having the ability to reduce its capacity.
- Such motors have a high peak efficiency, and a flatter efficiency versus torque curve.
- the motor 22 / 23 will still operate more efficiently than the prior art which utilize an induction motor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
Abstract
A scroll compressor is provided with some capacity reduction technique such as a bypass port. The electric motor for driving the scroll compressor is not an induction motor, but rather a line fed permanent magnet synchronous motor is utilized. Such motors have a higher overall efficiency, and thus will be more efficient at reduced capacity operation.
Description
- This application relates to a scroll compressor having a line fed permanent magnet synchronous type motor, which has a relatively constant power curve as a load changes, and wherein the scroll compressor is provided with a function to reduce capacity.
- Scroll compressors are becoming widely utilized in refrigerant compression applications. In a scroll compressor, a pair of scroll elements each have a base and a generally spiral wrap extending from the base. The wraps interfit to define compression chambers. An electric motor drives a shaft, and the shaft drives one of the two scroll members to rotate relative to the other through a non-rotation coupling.
- There are many enhancements to the basic scroll compressor design. In one enhancement, partially or fully compressed refrigerant may be tapped back to a suction pressure to reduce the load on the compressor motor when there is a reduced capacity needed for a refrigerant system associated with the compressor. This is known as bypass or unloaded operation.
- Other ways of reducing the capacity of the compressor, such as pulse width modulation to a back pressure chamber are also known. With all of these functions, the torque on the compressor motor is reduced.
- In all known scroll compressor designs, an induction motor has been utilized. An induction motor has a peak efficiency at a certain load torque, above as well as below which the efficiency decreases. The value of reducing the capacity, which is to save energy, is somewhat lost due to the reduced efficiency.
- In the disclosed embodiment of this invention, a scroll compressor having some way of reducing capacity is provided with a line fed permanent magnet synchronous type motor. The permanent magnet motor has a higher peak efficiency, and a flatter efficiency versus torque curve compared to the prior art induction motor.
- These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
-
FIG. 1 is a scroll compressor incorporating the present invention. - A
scroll compressor 20 is illustrated inFIG. 1 . As shown, amotor stator 22 causes amotor rotor 23 to rotate. Whenrotor 23 rotates, ashaft 24 is driven to rotate. Shaft 24 causes an orbitingscroll 26 to orbit relative to anon-orbiting scroll 28, as known. The components as described at this point are housed within ashell 30. Asuction port 32 receives a suction refrigerant from a refrigerant cycle, and delivers that refrigerant to compression chambers between the orbitingscroll 26 and non-orbitingscroll 28. Adischarge tube 34 delivers a compressed refrigerant downstream into the refrigerant cycle. -
Bypass ports 36 communicate with the compression chambers, and may return a partially or fully compressed refrigerant to the suction pressure, such assuction tube 32. As shown, abypass line 38 incorporates avalve 40 to selectively communicate this refrigerant back to the suction port. However, any other way of communicating partially or fully compressed refrigerant back to the suction pressure may be utilized with this invention. Moreover, other ways of modulating the capacity of the compressor would come within the scope of this invention. As an example, scroll compressors are known wherein a biasing force is provided behind one of the two scroll compressors. Pulse width modulation techniques may be utilized to lower that biasing force under certain conditions such that the scroll members can come away from each other and reduce the capacity. - As shown in
FIG. 1 , the scroll compressor includes atap 100 extending through the orbitingscroll member 26 into aback pressure chamber 102. As known, this creates a biasing force holding the orbitingscroll member 26 in contact with thenon-orbiting scroll member 28. In addition, the drive between theshaft 24 and thescroll compressor 26 is through aslider block arrangement 110. Such arrangements allow for radial movement of the orbitingscroll 26. Both the axial compliance and the radial compliance allow the reduction of capacity by allowing the wraps of the scroll members to move out of contact with each other. Techniques for providing this reduction in capacity are known. It is the use of a particular motor with such an ability to reduce capacity which is inventive here. - Any other capacity modulation technique would come within the scope of this invention.
- This invention relates to the use of a permanent magnet synchronous motor for any scroll compressor having the ability to reduce its capacity. Such motors have a high peak efficiency, and a flatter efficiency versus torque curve. Thus, when the capacity is reduced, the
motor 22/23 will still operate more efficiently than the prior art which utilize an induction motor. - While an embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.
Claims (5)
1. A scroll compressor comprising:
a first scroll member having a base and a generally spiral wrap extending from said base;
a second scroll member having a base and a generally spiral wrap extending from its base, said generally spiral wraps interfitting to define compression chambers; and
an electric motor operable to drive a rotary shaft to in turn cause said second scroll member to orbit relative to said first scroll member, said electric motor being a permanent magnet synchronous motor, wherein said permanent magnet synchronous motor is a line fed motor, running directly from the mains without requirement of frequency inverter.
2. Scroll compressor as set forth in claim 1 , wherein a capacity reduction feature being incorporated into the scroll compressor to allow the reduction of capacity provided by the scroll compressor under certain conditions.
3. The scroll compressor as set forth in claim 1 , wherein bypass ports are provided to reduce the capacity of the scroll compressor.
4. The scroll compressor as set forth in claim 1 , wherein said second scroll member and said first scroll member are held together, but are movable away from each other in an axial direction.
5. The scroll compressor as set forth in claim 1 , wherein the wraps of said first and second scroll member are held together but are capable of moving radially away from each other.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/183,149 US20100028182A1 (en) | 2008-07-31 | 2008-07-31 | Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports |
KR1020090042618A KR20100014104A (en) | 2008-07-31 | 2009-05-15 | Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports |
EP09251430A EP2149708A3 (en) | 2008-07-31 | 2009-05-28 | Scroll compressor with bypass ports driven by a line fed permanent magnet sychronous type motor. |
CN200910147498A CN101639066A (en) | 2008-07-31 | 2009-06-16 | Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports |
JP2009164611A JP2010038154A (en) | 2008-07-31 | 2009-07-13 | Line fed permanent magnet synchronous type motor used for scroll compressor with bypass port |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/183,149 US20100028182A1 (en) | 2008-07-31 | 2008-07-31 | Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100028182A1 true US20100028182A1 (en) | 2010-02-04 |
Family
ID=41301344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/183,149 Abandoned US20100028182A1 (en) | 2008-07-31 | 2008-07-31 | Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100028182A1 (en) |
EP (1) | EP2149708A3 (en) |
JP (1) | JP2010038154A (en) |
KR (1) | KR20100014104A (en) |
CN (1) | CN101639066A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120201707A1 (en) * | 2011-02-04 | 2012-08-09 | Zlll Sun | Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber |
US20170241417A1 (en) * | 2016-02-24 | 2017-08-24 | Lg Electronics Inc. | Scroll compressor |
US10316843B2 (en) | 2016-05-30 | 2019-06-11 | Lg Electronics Inc. | Scroll compressor that includes a non-orbiting scroll having a bypass hole |
US10428819B2 (en) | 2016-05-25 | 2019-10-01 | Lg Electronics Inc. | Scroll compressor that includes a non-orbiting scroll having a bypass hole |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102444580B (en) * | 2010-09-30 | 2016-03-23 | 艾默生电气公司 | With the digital compressor of across-the-line starting brushless permanent magnet electromotor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6863510B2 (en) * | 2002-05-01 | 2005-03-08 | Lg Electronics Inc. | Vacuum preventing oil seal for scroll compressor |
US20060140792A1 (en) * | 2004-12-27 | 2006-06-29 | Hitachi Air Conditioning Systems Co., Ltd. | Displacement type compressor |
US7071650B2 (en) * | 2003-07-09 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Synchronous induction motor and electric hermetic compressor using the same |
US20070122302A1 (en) * | 2005-11-30 | 2007-05-31 | Scroll Technologies | Ductile cast iron scroll compressor |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100371171B1 (en) * | 2000-06-30 | 2003-02-05 | 엘지전자 주식회사 | Radial adaptation structure for scroll compressor |
KR100557057B1 (en) * | 2003-07-26 | 2006-03-03 | 엘지전자 주식회사 | Scroll compressor with volume regulating capability |
JP2005117771A (en) * | 2003-10-07 | 2005-04-28 | Hitachi Ltd | Permanent magnet type synchronous motor and compressor using it |
US7140851B2 (en) * | 2004-09-07 | 2006-11-28 | Chyn Tec. International Co., Ltd. | Axial compliance mechanism of scroll compressor |
JP2007181305A (en) * | 2005-12-28 | 2007-07-12 | Hitachi Ltd | Permanent magnet type synchronous motor and compressor using the same |
JP5016852B2 (en) * | 2006-06-09 | 2012-09-05 | 日立アプライアンス株式会社 | Permanent magnet motor, permanent magnet synchronous motor rotor and compressor using the same |
US7772736B2 (en) * | 2006-06-09 | 2010-08-10 | Hitachi Appliances, Inc. | Permanent magnet synchronous motor, rotor of the same, and compressor using the same |
-
2008
- 2008-07-31 US US12/183,149 patent/US20100028182A1/en not_active Abandoned
-
2009
- 2009-05-15 KR KR1020090042618A patent/KR20100014104A/en not_active Application Discontinuation
- 2009-05-28 EP EP09251430A patent/EP2149708A3/en not_active Withdrawn
- 2009-06-16 CN CN200910147498A patent/CN101639066A/en active Pending
- 2009-07-13 JP JP2009164611A patent/JP2010038154A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6863510B2 (en) * | 2002-05-01 | 2005-03-08 | Lg Electronics Inc. | Vacuum preventing oil seal for scroll compressor |
US7071650B2 (en) * | 2003-07-09 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Synchronous induction motor and electric hermetic compressor using the same |
US20060140792A1 (en) * | 2004-12-27 | 2006-06-29 | Hitachi Air Conditioning Systems Co., Ltd. | Displacement type compressor |
US20070122302A1 (en) * | 2005-11-30 | 2007-05-31 | Scroll Technologies | Ductile cast iron scroll compressor |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120201707A1 (en) * | 2011-02-04 | 2012-08-09 | Zlll Sun | Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber |
US8579614B2 (en) * | 2011-02-04 | 2013-11-12 | Danfoss Scroll Technologies Llc | Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber |
US20170241417A1 (en) * | 2016-02-24 | 2017-08-24 | Lg Electronics Inc. | Scroll compressor |
US10428818B2 (en) * | 2016-02-24 | 2019-10-01 | Lg Electronics Inc. | Scroll compressor |
US10428819B2 (en) | 2016-05-25 | 2019-10-01 | Lg Electronics Inc. | Scroll compressor that includes a non-orbiting scroll having a bypass hole |
US11204035B2 (en) | 2016-05-25 | 2021-12-21 | Lg Electronics Inc. | Scroll compressor having a valve assembly controlling the opening/closing valve to open and close communication passage and bypass holes on fixed scroll |
US10316843B2 (en) | 2016-05-30 | 2019-06-11 | Lg Electronics Inc. | Scroll compressor that includes a non-orbiting scroll having a bypass hole |
US11215181B2 (en) | 2016-05-30 | 2022-01-04 | Lg Electronics Inc. | Scroll compressor that includes a non-orbiting scroll member having a connection passage portion connected first valve assembly and second valve assembly |
Also Published As
Publication number | Publication date |
---|---|
CN101639066A (en) | 2010-02-03 |
EP2149708A2 (en) | 2010-02-03 |
JP2010038154A (en) | 2010-02-18 |
KR20100014104A (en) | 2010-02-10 |
EP2149708A3 (en) | 2011-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SCROLL TECHNOLOGIES,ARKANSAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAHN, GREGORY W.;REEL/FRAME:021321/0172 Effective date: 20080730 |
|
AS | Assignment |
Owner name: DANFOSS SCROLL TECHNOLOGIES, LLC,ARKANSAS Free format text: CHANGE OF NAME;ASSIGNOR:SCROLL TECHNOLOGIES, LLC;REEL/FRAME:022664/0098 Effective date: 20080815 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |