CN1130722A - 用于单级或多级工作的压缩机 - Google Patents
用于单级或多级工作的压缩机 Download PDFInfo
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- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/02—Compression machines, plants or systems with non-reversible cycle with compressor of reciprocating-piston type
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- 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
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
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- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/128—Crankcases
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- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/074—Details of compressors or related parts with multiple cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
一种有多排气缸的容积式压缩机,可以以多级方式或单级方式工作。单级工作时可以是一单排气缸工作,也可以是多排气缸并联工作。工作方式之间的转换由响应感受到的输入信息的一微处理器来控制。
Description
运输冷藏的货物需要一定的温度,例如运冰淇淋时需要温度是-20°F,运送某些冷冻食物时需为0°F,而运送鲜花和新鲜的水果蔬菜时需为40°F。一辆冷藏拖车也可以有一个以上温度要求不同的贮运室。此外,所遇到的环境温度可能在-20°F(或更低)到110°F(或更高)的范围内变化。由于在一趟运输中可能遇到变化范围很大的环境温度,而且货物也需要不同的温度,因而就需要有一个较大的制冷能力范围。共同转让的美国专利4,938,029、4,986,084和5,062,274揭示了适应货物的温度需要而降低制冷能力工作的压缩机,而美国专利5,016,447揭示了一种具有级间冷却的两级压缩机。在有多级压缩的往复式制冷压缩机中,中间压力的气体被引导穿过曲轴箱液槽。将这一办法用于低温工作场合可以工作得很好而提高效率,然而在中温和高温的场合却要出现一些复杂的问题。较高的曲轴箱压力会使油的有效粘度较低,推力垫圈的载荷增大,以及轴承的载荷增大。
一种具有多排气缸的压缩机,可以在低温运行过程中用多级工作,并以单级工作或多个并联的单级工作用于中温和高温运行。单级和多级工作之间的转换由微处理器响应传感到的级间或曲轴箱压力来控制。多级工作通过使用一经济器提供增大的制冷能力。通过将第一级旁通回吸入侧或是在第一级中采用吸入截流可以做到降低能力工作。
基本上,是通过感受级间的或曲轴箱液槽的压力并响应这一压力使压缩机以多级或单级方式工作。单级工作可以在多排气缸并联的情况下进行或是在多级工作中将第一级卸荷。
图1是按照本发明的创意工作的压缩机的一混合冷却工况包迹的图解示意图;
图2是一压缩机按照本发明的创意工作在两级工作情况下的示意图;
图3是一压缩机按照本发明的创意工作在并联单级工作情况下的示意图;
图4是采用本发明的用第一级旁通的压缩机的一制冷系统的示意图;
图5是采用本发明的应用吸入截流的压缩机的一制冷系统的示意图。
图1中,A-B-C-D-E-F-A表示一台在混合冷却构造中使用R-22的压缩机的以饱和排出温度对饱和吸入温度的关系表示的工况包迹。线B-E表示单级工作和多级工作之间的边界,这一边界是根据由推力垫圈和轴承载荷以及油的粘度限制的液槽或级间压力而建立的。特别是,在B-C-D-E-B所包区域中单级工作较为有效,而在A-B-E-F-A所包区域中两级工作较为有效。
在图2和3中,数字10总地表示一具有多排气缸的压缩机,其中活塞12和气缸13代表典型地为四个缸的第一排缸,而活塞14和气缸15代表典型地为两个缸的第二排缸。活塞12和14由电动机18通过曲轴20驱动而往复运动。曲轴20位于一底部具有一油池的曲轴箱22内。如图4和图5清楚地表示,压缩机10有分别连接至一制冷系统的蒸发器60和冷凝器62的吸入口24和排放口26。膨胀装置设置在蒸发器60和冷凝器62之间。吸入管路24分支成管路24-1和24-2,前者供给由活塞12代表的第一排气缸,后者包含一止回阀28并且连通于曲轴箱22。由活塞12代表的第一排气缸将热的、高压制冷剂气体排入包括三通阀32的管路30。根据三通阀32的位置,从管路30来的热高压气体或经过管路26-1供到排放口26,或经过管路34供到曲轴箱22。从曲轴箱22来的气体经过管路36被吸入由活塞14代表的第二排气缸,在其中气体被压缩并经过管路26-2输送到排放管路26。
微处理器50响应一个或多个传感来的状态通过操作器33控制三通阀32的位置。压力传感器40感受曲轴箱22中的压力,这一压力是压缩机10的工作状况的主要指示,这是因为中间级压力等于绝对吸入压力和排出压力的乘积的平方根。微处理器50接收代表设定值和一个或多个被冷却区域的温度的区域信息,同时也接收一些诸如吸入口和排出口处温度和/或例如传感器51所感受的压缩机10的压力之类的其它信息。
最初的工作状态是相应于区域的设定值,因此,当初始设定为低温时压缩机将以两级工作,而初始设定为中温或高温时,其将以单级工作。微处理器50通过操作器33控制三通阀32,以进入两级或单级工作状态。
参见图2,当三通阀32把管路30和34连通时,压缩机就以两级工作。从蒸发器供到管路24的气体经管路24-1供给到由活塞12代表的第一排气缸,所述气体被压缩并且供到管路30,而后经过三通阀32和管路34进入曲轴箱22。接着,曲轴管22内的气体经管路36被吸入由活塞14代表的第二排气缸,于是气体被进一步压缩并且经管路26-2和26进入冷凝器。由三通阀32阻止高压级排出的气体不会经管路26-1流入曲轴箱22,而吸入气体由于受到作用在止回阀28上的曲轴箱22内的背压阻止而不会经管路24-2进入曲轴箱。
现参见图3,当三通阀32把管路30和26-1连通时,压缩机就以并联的两个单级工作。从蒸发器经管路24来的气体被经管路24-1供到由活塞12代表的第一排气缸,所述气体被压缩并且供到管路30,而后经过三通阀32、管路26-1和管路26进入冷凝器。曲轴箱内的气体是处于吸入压力下,所以气体能从管路24经管路24-2和止回阀28进入曲轴箱22。同时,曲轴箱22内的气体经管路36被吸入由活塞14代表的第二排气缸,经压缩后再经过管路26-2排到共同排出口26。
一旦压缩机10处于工作状态,微处理器50就会主要是根据图1中所举例的适当的工作包迹使三通阀32在图2的单级工作和图3的并联单级工作之间转换。特别是,将由压力传感器40感受的压力与一固定值相比较来决定以两级工作或单级工作哪个为适当,并相应地确定三通阀32的位置。图2和3中那些点子的密度表示气体压力的高低。
在图2和3的构造中,可通过采用一可变速的电动机18来控制制冷能力。此外,如图4所示,也可以用增设包括电磁阀42的旁通管路38的办法来控制制冷能力。微处理器50控制着对电磁阀42的线圈43的通电,从而控制电磁阀42。特别是,当在需要进行制冷能力控制时,由微处理器50通过区域信息感受制冷能力,给线圈43通电,使电磁阀打开而允许流体在旁通管路38中流动。这样,第一级或称低级112的排气可流回到第一级的吸入侧。这就将压力传感器40感受的级间压力降低到一个略高于吸入压力的数值,而且全部负荷都仅由第二级114承担。这也就有效地使压缩机10成为一个具有第二级或称高级114的排量的单级压缩机。
图5示出了采用吸入截断来控制制冷能力的情况。吸入管路24-1分支成两个管路24-3和24-4,它们分别供给第一级或称低级11 2的两排气缸。管路24-3包括具线圈45的电磁阀44,而管路24-4包括具线圈47的电磁阀46。在需要进行制冷能力控制时,由微处理器50通过区域信息感受制冷能力,并由微处理器使线圈45和/或线圈47通电,阀44和/或阀46关闭。用这种办法可以做到比图4中的构造范围更大的制冷能力控制,这是因为例如一六缸压缩机可以仅以第二级或高级114的两个气缸载荷工作(阀44和46都关闭),或四个气缸载荷工作(阀44或46之一打开),或六个气缸都载荷工作(阀44和46都打开)。在将这一办法用于一两级压缩机时,该压缩机可以以两级方式工作(图2)、或以所有六个气缸并联单级工作,或以上述三分之一负荷增量单级工作。
从上述应该清楚,本发明提供了一种在微处理器50控制下能在很大制冷能力范围内工作的压缩机。这种工作范围宽的压缩机在负荷温度和环境温度范围都很宽的运输制冷中特别有效。
Claims (8)
1.一种压缩机装置(10),包具有一曲轴箱(22)、一适于连接于一蒸发器的吸入口(24)、以及一适于连接于一冷凝器的排出口(26),其包括:
多排气缸(12,13,14,15);
通常连接于所述吸入口(24)的所述多排气缸中的至少一排气缸(12,13);
通常连接于所述曲折箱和所述排放口的所述多排气缸中的另一排气缸(14,15);
用于有选择地将所述至少一排气缸或者连接于所述曲轴箱或者连接于所述排放口的装置,以便在所述至少一排气缸连接于所述曲轴箱时,所述另一排气缸作为一第二级,而当所述至少一排气缸连接于所述排出口时,所述至少一排气缸和所述另一排气缸成为并联的单级压缩机气缸。
2.如权利要求1所述的压缩机装置,其特征在于,它还包括用于当所述至少一排气缸连接于所述排出口时,使所述曲轴箱和所述吸入口流体连通的装置(24-2,28)。
3.如权利要求1所述的压缩机装置,其特征在于,它还包括用于控制所述至少一排气缸的工作能力的装置(18,38,42,43,24-3,24-4,45,46,47)。
4.如权利要求3所述的压缩机装置,其特征在于,所述用于控制工作能力的装置包括用于有选择地(使工作介质)旁通过所述至少一排气缸的装置(24-2,28)。
5.如权利要求3所述的压缩机装置,其特征在于,所述用于控制工作能力的装置包括有选择地控制工作介质从所述吸入口流向所述至少一排气缸的装置。
6.一种用于操作具有三排气缸、一个曲轴箱、一个适于连接于一蒸发器的吸入口、和一个适于连接于一冷凝器的排出口的压缩机的方法,所述方法包括以下步骤:
将(工作介质)气体从所述吸入口供到所述三排气缸中的第一排气缸和第二排气缸;
将气体从所述曲轴箱供到所述三排气缸中的第三排气缸;
将经压缩的气体从所述第三排气缸送到所述排出口;
有选择地将所述第一排和第二排气缸或者连接于所述曲轴箱或者连接于所述排出口,以便当所述第一排和第二排气缸连接于所述曲轴箱时它们用作第一级,所述第三排气缸用作第二级,而当所述第一排和第二排气缸连接于所述排出口时它们用作一个单级,而所述第三排气缸用作一个与所述第一排和第二排气缸并联的单级。
7.如权利要求6所述的方法,其特征在于,它还包括控制所述第一排和第二气缸的工作能力的步骤。
8.如权利要求6所述的方法,其特征在于,它还包括传感所述曲轴箱内的压力的步骤;以及
用感受到的压力来进行控制,以便有选择地使所述第一排和第二排气缸连接于所述曲轴箱或排出口。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US08/338,076 | 1994-11-14 | ||
US08/338,076 US5577390A (en) | 1994-11-14 | 1994-11-14 | Compressor for single or multi-stage operation |
Publications (1)
Publication Number | Publication Date |
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CN1130722A true CN1130722A (zh) | 1996-09-11 |
Family
ID=23323309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN95118793A Pending CN1130722A (zh) | 1994-11-14 | 1995-11-14 | 用于单级或多级工作的压缩机 |
Country Status (9)
Country | Link |
---|---|
US (1) | US5577390A (zh) |
EP (1) | EP0715077A3 (zh) |
JP (1) | JP2771491B2 (zh) |
KR (1) | KR0173514B1 (zh) |
CN (1) | CN1130722A (zh) |
AR (1) | AR000018A1 (zh) |
BR (1) | BR9505162A (zh) |
MY (1) | MY113326A (zh) |
TW (1) | TW293869B (zh) |
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WO2010078739A1 (zh) * | 2009-01-06 | 2010-07-15 | 浙江鸿友压缩机制造有限公司 | 多缸平移压缩装置 |
CN109405366A (zh) * | 2018-10-29 | 2019-03-01 | 珠海格力电器股份有限公司 | 空调循环系统、空调循环系统的控制方法及空调 |
CN112855491A (zh) * | 2020-12-28 | 2021-05-28 | 珠海格力节能环保制冷技术研究中心有限公司 | 一种压缩机、冰箱和控制方法 |
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US5839886A (en) * | 1996-05-10 | 1998-11-24 | Shaw; David N. | Series connected primary and booster compressors |
US5768901A (en) | 1996-12-02 | 1998-06-23 | Carrier Corporation | Refrigerating system employing a compressor for single or multi-stage operation with capacity control |
US5951261A (en) * | 1998-06-17 | 1999-09-14 | Tecumseh Products Company | Reversible drive compressor |
US6085533A (en) * | 1999-03-15 | 2000-07-11 | Carrier Corporation | Method and apparatus for torque control to regulate power requirement at start up |
US6321550B1 (en) | 1999-04-21 | 2001-11-27 | Carrier Corporation | Start up control for a transport refrigeration unit with synchronous generator power system |
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-
1995
- 1995-10-19 TW TW084111031A patent/TW293869B/zh active
- 1995-11-02 MY MYPI95003319A patent/MY113326A/en unknown
- 1995-11-09 EP EP95630115A patent/EP0715077A3/en not_active Withdrawn
- 1995-11-13 KR KR1019950040965A patent/KR0173514B1/ko not_active IP Right Cessation
- 1995-11-13 BR BR9505162A patent/BR9505162A/pt not_active IP Right Cessation
- 1995-11-14 JP JP7295163A patent/JP2771491B2/ja not_active Expired - Fee Related
- 1995-11-14 AR AR33422995A patent/AR000018A1/es unknown
- 1995-11-14 CN CN95118793A patent/CN1130722A/zh active Pending
Cited By (4)
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WO2010078739A1 (zh) * | 2009-01-06 | 2010-07-15 | 浙江鸿友压缩机制造有限公司 | 多缸平移压缩装置 |
CN109405366A (zh) * | 2018-10-29 | 2019-03-01 | 珠海格力电器股份有限公司 | 空调循环系统、空调循环系统的控制方法及空调 |
CN109405366B (zh) * | 2018-10-29 | 2024-04-26 | 珠海格力电器股份有限公司 | 空调循环系统、空调循环系统的控制方法及空调 |
CN112855491A (zh) * | 2020-12-28 | 2021-05-28 | 珠海格力节能环保制冷技术研究中心有限公司 | 一种压缩机、冰箱和控制方法 |
Also Published As
Publication number | Publication date |
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KR960018230A (ko) | 1996-06-17 |
MY113326A (en) | 2002-01-31 |
EP0715077A3 (en) | 2000-03-15 |
AR000018A1 (es) | 1997-03-26 |
US5577390A (en) | 1996-11-26 |
BR9505162A (pt) | 1997-10-21 |
JPH08210249A (ja) | 1996-08-20 |
EP0715077A2 (en) | 1996-06-05 |
JP2771491B2 (ja) | 1998-07-02 |
TW293869B (zh) | 1996-12-21 |
KR0173514B1 (ko) | 1999-04-01 |
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