• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A self-modulating scroll compressor (20) includes a portion of valves (40, 44). A first valve (40) moves to a low capacity position when the pressure difference is below a predetermined amount. A second valve (44) moves to a low capacity position when the suction pressure is above a predetermined amount. Low capacity operation will only occur when both valves are open. The invention thus provides a scroll compressor model (20) that can self-modulate and control conditions or low capacity operation occurs based on two criteria.
    公开号:BE1018417A3
    申请号:E2004/0309
    申请日:2004-06-24
    公开日:2010-11-09
    发明作者:
    申请人:Scroll Tech；
    IPC主号:
    专利说明:

    Two-stage self-modulating scroll compressor.
    Background of the invention
    The present invention relates to a scroll compressor which self-modulates between high capacity and low capacitance based on two distinct criteria.
    Scroll compressors are becoming more widely used in refrigerant decompression applications. In a scroll compressor, a first scroll member has a base and a generally spiral envelope extending from the base. A second volute element is maintained in a non-orbiting mode with respect to the first devolute element and has an envelope that fits into a casing of the first volute element. The first scroll member is orbited with respect to the second and the nested envelopes define compression chambers for compressing a trapped refrigerant.
    One goal of a modern compressor model is to be able to provide at least two levels of capacity. In some cases, especially when the cooling load in a refrigerant cycle is not particularly high, a lower capacity may be desirable. Less energy is used to reduce the amount of refrigerant in low capacity operations. As a result, various modulation systems have been developed in the state of the art.
    In a modulation system, the compressor runs at low capacity operation when the pressure difference is small. The depression difference is the delta (difference) of the discharge pressure at the suction pressure. When this quantity is low, it indicates in some way that a lower capacity operation can be ensured.
    This state of the art compressor adequately operates to provide low capacity operation when the compressor is used in an air conditioning cycle. However, it is also desirable to use these compressors as part of a heat pump system. In a compressor that is used for both air conditioning and heat pump operation, there are times when a relatively low pressure difference does not indicate a need for low capacity. In particular, if the suction pressure is also low, the compressor may operate in a heat pump mode and high capacity operation will still be desirable. The state of the art will still provide low capacity operation in these circumstances.
    Summary of the invention.
    In a disclosed embodiment of the invention, two distinct criteria are considered by the self-modulating capacity control. A first valve is able to move between an open position and a closed position based on the suction pressure. If the suction pressure is low, the valve is held in the closed position and high capacity operation occurs. A second valve is held in the closed position when the pressure difference is high. As long as these two conditions (low suction pressure or high pressure differential) are maintained, a high capacity operation will occur. However, if neither condition is established, both valves move to the open position and the compressor self-modulates to low-power operation.
    These and other features of the invention may be better understood in the following specification and drawings, the following is a brief description.
    Brief description of the drawings.
    Fig. 1 represents a capacity envelope.
    Fig. 2 is a cross-sectional view of a scroll compressor according to the invention.
    Fig. 3A represents a compressor control under conditions leading to a low capacitance.
    Fig. 3B represents a condition in which high capacity will still be maintained.
    Fig. 3C represents another condition with high capacity.
    Fig. 3D is yet another high capacity condition.
    Fig. 4 is a graph showing the conditions which result in the four vacuum positions of FIGS. 3A to 3D.
    Detailed description of the preferred embodiment.
    Fig. 1 illustrates a desired capacity envelope for a scroll compressor that could be used in both heat pump and air conditioning applications. As mentioned previously, the state of the art does not have a low capacitance confined on the right side of the overall envelope. Instead, the upper line of the low capacity envelope extends to the left, as shown, in line with the state of the art compressor. As mentioned above, the area to the left of the low capacity envelope shown in FIG. 1 would desirably be maintained at high capacity at least during heat pump operation.
    The compressor illustrated in FIG. 2 form the envelope shown in FIG. 1. The compressor 20contains an orbiting scroll 22 which orbits relative to a non-orbiting volute 24. An intermediate pressure purge 26 and an intermediate pressure tap28 deliver refrigerant into a valve chamber associated with a valve 29. The valve 29 is sensitive to the overall suction pressure. The suction pressure, as known, is reported by a multiplier at the intermediate pressure. A spring 32 bypasses the body of the valve 40 from a valve stop 31 having a pin 34. As shown in FIG. 2, the suction pressure 36 leads to a socket 38 on one side of the valve body 40, which also includes the spring 32. As a result, the suction pressure and the force of the spring cause the valve 40 to the right to against the force of the intermediate pressure. As can be seen on theFig. 2, the intermediate pressure passing through the purge26 moves in a passage 42. As a result, this intermediate pressure is distributed between the enlarged portions 41 of the valve body 40. Because this intermediate expression "sees" the two parts 41, it does not affect the position of the valve body 40.However, as is also clear, the intermediate pressure through the plug 28 passes into a chamber on the right side of the valve body 40, and the enlarged rightmost fan portion 41, and drives the valve body 40 to the left. As the suction pressure increases, the difference between the intermediate pressure and the suction pressure also increases and, finally, the position of the valve body 40 moves towards that on the Fig. 2. As illustrated, the valve 40 comprises an intermediate portion throttled between the two enlarged portions 41.
    A valve stop is identified by item 30, which stops the valve body 40 when it is driven to the right. As one skilled in the art will appreciate, the valve stop 30 is configured so that fluid can flow from the socket 28 into the chamber to the left of the stop valve 30 and against the enlarged portion 41 at the right.
    A second valve 44 comprises a piston 46 which observes the discharge pressure on the left side from a discharge pressure chamber 47. A suction pressure 49 and an intermediate pressure outlet 51 distribute the pressure of the refrigerant in a This fluid under pressure together with the force of the spring 52 tends to retain the piston 46 in the position shown against a piston stop 60. In FIG. 2, the two valves 29 and 40 are shown in the open position so that the refrigerant can flow from the purge 26 into the lines 42, 51, 49 and 38 to return to the suction 36. As a result, with the valves 29 and 44 in the position illustrated in FIG. 2, a low capacity operation is established. As can be noted in FIG. 2, the refrigerant intake passing through line 42 is simply the refrigerant to be purged during low capacity operation. LaFig. 3A represents this same operation with low capacity. This is a situation in which the suction pressure is above a specific amount and the pressure difference is below a particular amount. This is Zone 1 of the Fig. 4. Under these conditions, low-efficiency operation is desirable.
    As illustrated in FIG. 3B, the pressure differential is now increased so that the discharge pressure to the left side of the piston 46 sets the force on the right side of the piston 46. In these conditions, the piston 46 blocks the plug 49 and the refrigerant is more deviated. As a result, high capacity operation occurs. As illustrated in FIG. 3B, the suction pressure is also low so that the valve body 40 has moved to the right by blocking the pipe 42. For this separate zone, high capacity operation will occur. As illustrated in FIG. 4, it would be from zone 2.
    As illustrated in FIG. 3C, the pressure difference is lower. However, the suction pressure is still low enough that the valve 40 remains in the blocking position 42. It will still produce a high capacity operation. This is the zone 3 of FIG. 4.
    Fig. 3D represents the situation in which the pressure difference is high enough to drive the piston 46 to the right, while the suction pressure is also sufficiently high for the valve body 40 to move to the open position. Even so, because the piston 46 blocks flow through line 49, high capacity operation will still occur. This is zone 4 of FIG. 4.
    In summary, the invention discloses a simple system which requires that two distinct conditions be present before the compressor is self-modulating to switch to a low capacity operation. Although a preferred embodiment of the invention has been disclosed, one skilled in the art will recognize that certain modifications will fall within the scope of the invention. For this reason, the following claims will be studied in order to determine the true scope and content of the invention.
    权利要求:
    Claims (7)
    [1]
    A scroll compressor (20) comprising: a first scroll member (24) having a base and a generally spiral envelope extending from said base, said first and second scroll member envelopes (22, 24) interlocking with each other; for defining compression chambers, and said second volute member (22) being driven to orbit relative to said first scroll member (24) for decompressing a refrigerant trapped in said compression chambers, and a capacity control which is self-modulating on the basis of the conditions of the refrigerant, said capacity control comprising two distinct stages (40,44), a first valve (40) moving to a low capacity state when a pressure difference is below a first predetermined quantity , and a second one (44) of said valves moving to a low capacitance state when a suction pressure is above a second predetermined amount so that low capacity operation occurs only when said pressure difference is below said first. predetermined amount and that said suction pressure is above said second amount.
    [2]
    The scroll compressor (20) according to claim 1, wherein said second valve (44) has a first chamber for receiving a refrigerant at the suction pressure and a spring force (32), said first chamber pressing said piston ( 46) to a second chamber which receives an intermediate refrigerant from a decompression chamber, said second valve (44) moving to a position allowing the flow of refrigerant from a compression chamber to return to a suction chamber if said pressure of suction is above said second predetermined amount.
    [3]
    A scroll compressor (20) according to claim 1 or 2, wherein said first valve (40) comprises a piston (46) which observes a discharge pressure on one side, and a lower pressure with a spring force (32, 52). on a second face, so that said piston (46) moves to a position blocking the flow of refrigerant from a compression chamber to a suction chamber if said pressure difference is above said first determined amount.
    [4]
    4, - scroll compressor (20) according to claim 2, wherein said second valve (44) is movable in a valve chamber, and said second valve (44) having two enlarged portions (41) and a thinner intermediate portion, said intermediate part wherein the thinner is aligned with an intermediate vacuum purge (26) to purge the coolant from an intermediate compression chamber to a suction pressure chamber when said suction pressure is above said second predetermined amount.
    [5]
    5. Scroll compressor (20) according to Claims 1 to 4, wherein said scroll compressor (20) is used in heat pump mode and in air conditioning mode.
    [6]
    A scroll compressor (20) comprising: a first scroll member (24) having a base and a generally spiral wrapper extending from said base, and a second scroll member (22) having a generally spun base and wrapper; extending from said base, said envelopes of said first and second devolute members (24, 22) interlocking to define decompression chambers, and said second volute member (22) being driven to orbit relative to said first volute member ( -24) for compressing a refrigerant trapped in said compression chambers, and a capacity control that is self-modulating on the basis of the conditions of the refrigerant, said capacity control comprising two separate valves (40, 44), a first valve (40) moving to a low capacity state when a pressure difference is below a first predetermined amount, and a e second (44) of said valves moving to a low capacitance state when a suction pressure is above a second predetermined amount so that a low capacitance operation occurs only when said pressure difference is in below said first predetermined amount and said suction pressure is above said second predetermined amount, said second valve (44) having a first chamber for receiving a refrigerant at the suction pressure and a spring force (52). ), said first chamber urging said piston (46) toward a second chamber which receives a refrigerant intermediate a compression chamber, said second valve (44) moving to a position permitting the flow of refrigerant from a decompression chamber to return to a suction chamber where said suction pressure is above said second e predetermined quantity, said first valve (40) comprising a piston (46) which observes a discharge pressure on one side, and a lower pressure with a spring force (52) on a second surface, so that said piston moves to a blocking position the flow of refrigerant from a compression chamber to a suction chamber with a pressure difference is above said first determined quantity, and said scroll compressor (20) is used in heat pump mode as well as air conditioning mode.
    [7]
    7. A scroll compressor (20) according to claim 6, wherein said second valve (44) is movable in a valve chamber, and said second valve (44) having two enlarged portions (41) and a thinner intermediate portion, said intermediate portion a thinner one being aligned with an intermediate vacuum purge (26) to purge the coolant from an intermediate compression chamber to a suction pressure chamber when said suction pressure is above said second predetermined amount. Legend of figuresFig. 1 Saturated discharge temp: Discharge temperature at saturation High capacity: High capacityLow capacity: Low capacity Saturated suction temp. : Suction temperature at saturation Fig. 3A Valve status at zone: State of the valve in the zone
    类似技术:
    公开号 | 公开日 | 专利标题
    BE1018417A3|2010-11-09|COMPRESSOR WITH TWO STAGE SELF-MODULATING VOLUME.
    US7094038B2|2006-08-22|Vacuum preventing device for scroll compressor
    US6769881B2|2004-08-03|Vacuum preventing device for scroll compressor
    WO2003064857A3|2003-11-13|Variable capacity compressor and heat exchanging system
    KR20050096766A|2005-10-06|Apparatus for preventing heat of scroll compressor
    EP1498610A3|2008-06-11|Capacity modulated scroll compressor
    FR2969227A1|2012-06-22|SPIRAL REFRIGERATING COMPRESSOR
    CA2224747C|2001-09-18|Combination valve for screw compressors
    WO2012080612A2|2012-06-21|Scroll refrigeration compressor
    KR19980042643A|1998-08-17|Reverse rotation protected scroll machine
    FR2960948A1|2011-12-09|SPIRAL REFRIGERATING COMPRESSOR
    JP2003254263A|2003-09-10|Scroll compressor
    US6190138B1|2001-02-20|Flow valve for correcting reverse rotation in scroll compressor
    KR100512997B1|2005-09-05|Scroll compressor
    US6224356B1|2001-05-01|Check valve stop and ports
    US6217302B1|2001-04-17|Floating seal bias for reverse fun protection in scroll compressor
    BE1014779A3|2004-04-06|External pressure regulator for high low pressure compressor scroll.
    BE1015143A6|2004-10-05|Scroll compressor discharge controlled fluid.
    US6554592B1|2003-04-29|Scroll compressor with condition responsive back pressure chamber valve
    FR2794189A1|2000-12-01|VOLUTE COMPRESSOR
    FR3032493A1|2016-08-12|
    US6379133B1|2002-04-30|Scroll compressor with reduced stiction surface for check valve
    JP2005048653A|2005-02-24|Differential pressure valve mechanism
    KR100308289B1|2002-01-15|Protection device of a scroll compressor
    JP2010151060A|2010-07-08|Scroll compressor
    同族专利:
    公开号 | 公开日
    US6984114B2|2006-01-10|
    GB2403271B|2006-06-14|
    US6884042B2|2005-04-26|
    GB2403271A|2004-12-29|
    GB0413659D0|2004-07-21|
    US20050042125A1|2005-02-24|
    US20040265140A1|2004-12-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH03202695A|1989-12-29|1991-09-04|Toyota Autom Loom Works Ltd|Variable volume scroll type compressor for air conditioning of vehicle|
    US5577897A|1992-04-01|1996-11-26|Nippondenso Co., Ltd.|Scroll-type variable-capacity compressor having two control valves|
    US5885063A|1996-05-07|1999-03-23|Matshushita Electric Industrial Co., Ltd.|Variable capacity scroll compressor|
    JPH10159758A|1996-11-29|1998-06-16|Matsushita Electric Ind Co Ltd|Capacity-controlled scroll compressor|
    JPH0411757B2|1984-08-22|1992-03-02|Hitachi Ltd|
    JPS63212789A|1987-02-28|1988-09-05|Sanden Corp|Variable capacity type scroll compressor|
    JPH0615872B2|1987-06-30|1994-03-02|サンデン株式会社|Variable capacity scroll compressor|
    JP2550612B2|1987-10-19|1996-11-06|ダイキン工業株式会社|Capacity control mechanism of scroll compressor|
    JP3022593B2|1990-10-31|2000-03-21|株式会社秩父富士|IC socket|
    JP2846106B2|1990-11-16|1999-01-13|三菱重工業株式会社|Scroll compressor|
    JP2972370B2|1991-03-15|1999-11-08|サンデン株式会社|Variable capacity scroll compressor|
    JPH04339189A|1991-05-15|1992-11-26|Sanden Corp|Scroll type fluid device|
    US5169294A|1991-12-06|1992-12-08|Carrier Corporation|Pressure ratio responsive unloader|
    JP2831193B2|1992-02-06|1998-12-02|三菱重工業株式会社|Capacity control mechanism of scroll compressor|
    JP3723283B2|1996-06-25|2005-12-07|サンデン株式会社|Scroll type variable capacity compressor|
    US6413058B1|2000-11-21|2002-07-02|Scroll Technologies|Variable capacity modulation for scroll compressor|
    US6551069B2|2001-06-11|2003-04-22|Bristol Compressors, Inc.|Compressor with a capacity modulation system utilizing a re-expansion chamber|US20070036661A1|2005-08-12|2007-02-15|Copeland Corporation|Capacity modulated scroll compressor|
    US20080034772A1|2006-07-27|2008-02-14|Bristol Compressors, Inc.|Method and system for automatic capacity self-modulation in a comrpessor|
    US8485789B2|2007-05-18|2013-07-16|Emerson Climate Technologies, Inc.|Capacity modulated scroll compressor system and method|
    US20090071183A1|2007-07-02|2009-03-19|Christopher Stover|Capacity modulated compressor|
    US20090050219A1|2007-08-21|2009-02-26|Briggs And Stratton Corporation|Fluid compressor and control device for the same|
    EP2215363B1|2007-10-24|2017-06-28|Emerson Climate Technologies, Inc.|Scroll compressor for carbon dioxide refrigerant|
    KR101368394B1|2007-10-30|2014-03-03|엘지전자 주식회사|Scroll compressor|
    US20090116977A1|2007-11-02|2009-05-07|Perevozchikov Michael M|Compressor With Muffler|
    KR100916229B1|2008-01-31|2009-09-08|엘지전자 주식회사|Apparatus for changing mode in scroll compressor|
    EP2307728B1|2008-05-30|2016-08-10|Emerson Climate Technologies, Inc.|Compressor having output adjustment assembly including piston actuation|
    CN102588277B|2008-05-30|2014-12-10|艾默生环境优化技术有限公司|Compressor having capacity modulation system|
    EP2712904A1|2008-05-30|2014-04-02|3M Innovative Properties Company|Adhesive compositions with multiple tackifiers|
    CN102076963B|2008-05-30|2013-09-18|艾默生环境优化技术有限公司|Compressor having capacity modulation system|
    CN102089523B|2008-05-30|2014-01-08|艾默生环境优化技术有限公司|Compressor having capacity modulation system|
    US7967583B2|2008-05-30|2011-06-28|Emerson Climate Technologies, Inc.|Compressor having capacity modulation system|
    US7976296B2|2008-12-03|2011-07-12|Emerson Climate Technologies, Inc.|Scroll compressor having capacity modulation system|
    US8082747B2|2008-12-09|2011-12-27|Thermo King Corporation|Temperature control through pulse width modulation|
    US7988433B2|2009-04-07|2011-08-02|Emerson Climate Technologies, Inc.|Compressor having capacity modulation assembly|
    US8616014B2|2009-05-29|2013-12-31|Emerson Climate Technologies, Inc.|Compressor having capacity modulation or fluid injection systems|
    US8568118B2|2009-05-29|2013-10-29|Emerson Climate Technologies, Inc.|Compressor having piston assembly|
    US8517703B2|2010-02-23|2013-08-27|Emerson Climate Technologies, Inc.|Compressor including valve assembly|
    WO2012061211A2|2010-11-02|2012-05-10|3M Innovative Properties Company|Reflective articles and methods of making the same|
    US9804305B2|2012-01-31|2017-10-31|3M Innovative Properties Company|Methods for sealing the edges of multi-layer articles|
    US9651043B2|2012-11-15|2017-05-16|Emerson Climate Technologies, Inc.|Compressor valve system and assembly|
    US9249802B2|2012-11-15|2016-02-02|Emerson Climate Technologies, Inc.|Compressor|
    US9127677B2|2012-11-30|2015-09-08|Emerson Climate Technologies, Inc.|Compressor with capacity modulation and variable volume ratio|
    US9435340B2|2012-11-30|2016-09-06|Emerson Climate Technologies, Inc.|Scroll compressor with variable volume ratio port in orbiting scroll|
    US20150004039A1|2013-06-28|2015-01-01|Emerson Climate Technologies, Inc.|Capacity-modulated scroll compressor|
    US9739277B2|2014-05-15|2017-08-22|Emerson Climate Technologies, Inc.|Capacity-modulated scroll compressor|
    US9989057B2|2014-06-03|2018-06-05|Emerson Climate Technologies, Inc.|Variable volume ratio scroll compressor|
    KR101873417B1|2014-12-16|2018-07-31|엘지전자 주식회사|Scroll compressor|
    US9790940B2|2015-03-19|2017-10-17|Emerson Climate Technologies, Inc.|Variable volume ratio compressor|
    US10378540B2|2015-07-01|2019-08-13|Emerson Climate Technologies, Inc.|Compressor with thermally-responsive modulation system|
    CN207377799U|2015-10-29|2018-05-18|艾默生环境优化技术有限公司|Compressor|
    US10801495B2|2016-09-08|2020-10-13|Emerson Climate Technologies, Inc.|Oil flow through the bearings of a scroll compressor|
    US10890186B2|2016-09-08|2021-01-12|Emerson Climate Technologies, Inc.|Compressor|
    US10753352B2|2017-02-07|2020-08-25|Emerson Climate Technologies, Inc.|Compressor discharge valve assembly|
    US11022119B2|2017-10-03|2021-06-01|Emerson Climate Technologies, Inc.|Variable volume ratio compressor|
    US10962008B2|2017-12-15|2021-03-30|Emerson Climate Technologies, Inc.|Variable volume ratio compressor|
    US10995753B2|2018-05-17|2021-05-04|Emerson Climate Technologies, Inc.|Compressor having capacity modulation assembly|
    KR102072154B1|2018-09-19|2020-01-31|엘지전자 주식회사|Scroll compressor|
    US11209000B2|2019-07-11|2021-12-28|Emerson Climate Technologies, Inc.|Compressor having capacity modulation|
    CN114173833A|2019-07-25|2022-03-11|3M创新有限公司|Fluid management medical adhesive article with microstructured surface|
    法律状态:
    2011-12-31| RE| Patent lapsed|Effective date: 20110630 |
    优先权:
    申请号 | 申请日 | 专利标题
    US10/607,282|US6884042B2|2003-06-26|2003-06-26|Two-step self-modulating scroll compressor|
    US60728203|2003-06-26|
    [返回顶部]