CN1188219A - 采用能力可控、可以单级或多级运行的压缩机的制冷*** - Google Patents
采用能力可控、可以单级或多级运行的压缩机的制冷*** Download PDFInfo
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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
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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
- 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
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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
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F04B2201/00—Pump parameters
- F04B2201/08—Cylinder or housing parameters
- F04B2201/0807—Number of working cylinders
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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- 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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- 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
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Abstract
一种具有多排气缸的压缩机可以作多级、单级和多个平行的单级运行,作多级运行时,可以用或不用节约器。在多级运行过程中,低级排气缸中一个气缸排可以卸载,以减小第一级的输出,或可将第二级旁路以作单级运行。
Description
运输制冷中对冰淇淋需要-20°F的温度、对于一些冷冻食品而言需要0°F的温度、对于花、新鲜水果和蔬菜需要40°F的温度。一辆挂车也可以有几个其中的负载需要不同温度要求的分隔室。对于某些货物诸如水果、蔬菜和花而言,必须对温度进行严格控制,以防这些货物过早熟化或开花。此外,环境温度的变化范围可以从-20°F或-20°F以下到110°F或110°F以上。由于在一次行程中所遇到的环境温度可能有较大的变化范围,以及变化范围很宽的负载温度要求,因此,对制冷能力也提出了范围较宽的要求。运输制冷场合需要多级压缩机,那是因为多级压缩机提供了比传统单级压缩机有所改进的制冷能力而成本费用增加得不多。但是采用目前已有的多级压缩机技术对使用者来说是比较困难的,因为这种技术需要相当多的外部阀和管道,并具有许多使压缩机能安全运行所必要的应用限制。日本专利53-133,257揭示了一种多级压缩机的结构。共同转让的美国专利第5,577,390涉及多级压缩机的运行,共同转让的美国专利申请第08/360,483,现在的美国专利第5,577,390,涉及多级压缩机中的能力控制。共同转让的美国专利4,938,029、4,986,084和5,062,274揭示了响应负载要求可以减小运行能力的结构,而美国专利5,016,477揭示了具有级间冷却的两级压缩机。在具有多级压缩的往复制冷压缩机中,中压气体可以通过曲轴箱油槽输送。在低温场合采用这种方式其工作是相当好的,可以提高效率,但是,在中温和高温场合就会出现许多问题。较高的曲轴箱压力会产生低效率的油粘度、使止推垫圈负载以及轴承负载增加。
有一种具有多排气缸的压缩机可以在低温运行时作多级运行,对于中温和高温运行则以一个单级或多个平行的单级运行。另外,当压缩机处在两级运行时可采用节约器。单级与多级运行之间的转换由一微处理器进行控制,即,微处理器在负载下降的情况下响应检测到的吸入侧或曲轴箱油槽压力或箱的温度而进行转换。多级运行时通过使用节约器可以提高能力,同时可以降低各级之间的压力差异。而通过使第一级旁路回到吸入侧、在第一级中采用吸入截止、旁路整个第一级或旁路高级则可减小运行能力。
假定一六缸压缩机构成每一排为两个的三排气缸,两个外侧排或端部排(即两个外侧或端部排气缸,在此省略气缸二字,以下同)用于低级排气缸。低级排中的一个排(LS-1)设置有气缸盖结构,该气缸盖结构允许把节约器气体引入气缸盖排出侧。另一个低级排的气缸(LS-2)可设置有一标准的(通常的)吸入截止卸载头。压缩机的中心排气缸可作为高级气缸(HS)并设置有允许LS-2的排出气体穿过而到达HS内部HS吸入侧的气缸盖。采用一阀板,该阀板可阻断吸入气体从曲轴箱流入HS的吸入侧。
本发明通过把吸入气直接输送到曲轴箱并使级间气体的输送内部化来简化多级压缩机的应用和控制。连接到压缩机的管子仅仅是传统的吸入和排出连接管加上一个用于引导节约器气体的连接管。与一般的单级***相比,所需要增加的***部件只是一个节约器、一个节约器膨胀阀、一个节约器液体管道螺线管阀和旁路管道阀。
对本发明的压缩机和***结构的能力可以进行六种工作方式的控制。这六种方式是:单级运行,两个气缸/一排,LS-1加载;单级运行,LS-1和LS-2都加载;改进的多级运行,一个低级排LS-1两个气缸泵入高级排HS,节约器可以工作或不工作;以及传统的多级运行,使LS-1和LS-2都泵入HS,节约器可以工作或不工作。
本发明的一个目的是提供一种简化的多级压缩机结构,它能使吸入气通过曲轴箱输送。
本发明的另一个目的是简化用在运输和/或固定/商用制冷***中的多级压缩机的结构和应用。
本发明的又一个目的是提供一种压缩机,这种压缩机可以进行多级和单级运行,单级运行时,可以是一个单级或多个平行单级。这些目的和将在下文变得显而易见的其它目的是通过本发明的来实现的。
基本上,对吸入或曲轴箱油槽压力和/或箱或区域温度加以检测,并对检测结果作出响应,压缩机可以作多级或单级运行。单级运行可以是多排气缸并联或在多级运行中卸载第一级或第二级,在多级运行中可以使用节约器。
图1是采用本发明压缩机的一制冷***的示意图;
图2是压缩机的示意图;
图3是高侧气缸盖的视图;以及
图4是沿图3的线4-4截取的剖视图。
微处理器100对图1中的制冷***10进行全面的控制。微处理器100接受指示冷却要求的区段或区域输入信息并对此作出反应,在用于运输制冷***时启动和/或接合驱动压缩机12的内燃发动机(未示出),在用于固定/商用制冷***时对驱动压缩机12的电动机提供动力。
压力传感器40检测在曲轴箱14中的吸入压力,该压力传感器40是压缩机12运行的第一级的主要指示器,当检测到的压力在预定值之上时,它指示出对压缩机12进行加载的需要。微处理器100响应由压力传感器40检测到的压力和区段或区域输入信息通过控制螺线管阀SV-1至SV-4来控制压缩机12的能力,由此控制***10。SV-1是常开阀,SV-2至SV-4是常闭阀。阀SV-2至SV-4中只有一个在任何时候都可以打开。阀SV-2和SV-3以及它们所在的管道可被认为是冗余的或交替使用的,通常在一个***中只有一个螺线管阀起作用。
电动机(未示出)通过一曲轴(未示出)来往复驱动诸活塞(未示出)。曲轴位于其底部具有一油槽的的曲轴箱14中。压缩机12具有分别连接于制冷***10的蒸发器20和冷凝器22的一吸入管道16和一排出管道18。节约器30和热膨胀装置TXV32串联在冷凝器22与蒸发器20之间。吸入管道16包括曲轴箱14并分成两路,一路是送到第一低级排LS-1气缸的管道16-1,一路是含有吸入截止阀SV-1并输送到第二低级排LS-2气缸的管道16-2。当SV-1(阀省略,以下同)打开时,第一和第二排即LS-1和LS-2把热的中压制冷剂气体排入用作高级HS的吸入强制通风的强制通风***M之中。从高级HS排出的热高压气体通过排出管道18以排出压力PD供应给冷凝器22。在冷凝器22中,热制冷剂气体把热量释放给冷凝器的空气中,借以冷却压缩气体,并使制冷剂由气态变成液态。当螺线管阀SV-4关闭时,液态制冷剂由冷凝器22经液体管道24和不工作的节约器30流到恒温膨胀阀TXV32。当液态制冷剂通过TXV32的小孔时,其中的一些液态制冷剂汽化成气体(闪蒸气体)。气液混合制冷剂通过管道26到蒸发器20。通过蒸发器的空气中的热量被制冷剂吸收,使其余的液态制冷剂在蒸发器20的盘管中蒸发。然后在蒸发器压力PEVAP下的蒸发的制冷剂通过吸入管道16和曲轴箱14流入管道16-1和16-2分别通向压缩机12的低级LS-1和LS-2,以完成流体的流通回路。
通过打开螺线管阀SV-4,微处理器100把一部分液态制冷剂从液体管道24转入分支管道24-1,允许制冷剂在TXV34的控制之下流过节约器30,由此使节约器30工作。当伺服阀SV-4和TXV34打开时,膨胀的制冷剂以节约器的压力PECON通过管道24-1供应给强制通风***M,该强制通风M相当于低级排LS-1和LS-2的排出强制通风和高级排HS的吸入气强制通风。当SV-1和SV-4打开时,可获得最大能力。关闭螺线管阀SV-1,吸入截止而使低级排LS-2卸载,此时就可通过减少***的流量来减小总能力,这种能力的减小与节约器是否工作无关。
当关闭螺线管阀SV-4时,节约器不工作,就可实现能力减小的两级运行。关闭螺线管阀SV-1由此低级排LS-2因吸入截断而卸载就可使能力进一步减小。通过打开阀SV-2使第一级旁路,从而使高级排HS承担全部泵送工作,或通过打开阀SV-3使第二级旁路可实现制冷能力减小的单级运行。当打开阀SV-3时,低级排LS-1和LS-2都能泵送,或通过关闭SV-1使LS-2卸载。如上所述,SV-2和SV-3一般是交替使用的。
当阀SV-4打开而阀SV-1关闭时,节约器运行,此时LS-1泵入HS。LS-2因SV-1关闭而截止。通过热气体旁路也可实现LS-2的卸载。关闭SV-4就使节约器停止工作。
当SV-4和SV-1关闭而SV-3打开时,进入单级运行,LS-1担当全部工作。如果SV-1打开,则进入平行的单级运行,此时LS-1和LS-2同时工作。
如上所述,本发明的高级排HS需要一经改变的气缸盖。请参阅图2,从图中可以看出,管道16-1输送到LS-1的吸入腔L,管道16-2输送到LS-2的吸入腔L。彼此流体连通的诸腔M表示LS-1和LS-2的排出腔和HS的吸入腔。LS-2的腔M通过一经过HS的气缸盖50的腔H的通道50-4与HS的腔M流体连通。现请参阅图3和4,从图中可以看出隔板50-1把气缸盖50分割成腔M和腔H。阀板(未示出)与气缸盖50共同构成HS的腔M和S。为了提供螺栓位置和所需的流动横截面,设置输入口50-2和50-3。口50-2和50-3与通道50-4和HS的阀板(未示出)中的相应口对齐。从而与LS-2的腔M流体连通。因此,从LS-2的腔M到HS的M的流体路径依次包括在HS的阀板中的诸口即口50-2和50-3和通向HS的腔M的通道50-4。如图2所示,LS-1的腔M通过一流体路径与HS的腔M连接,但它不需要像通道50-4那样对气缸盖50作专门的改变。
Claims (6)
1.一种制冷***(10),具有一闭合的回路,它依次包括一多级压缩机(12)、一冷凝器(22)、一节约器(30)、一膨胀装置(32)和一蒸发器(20),一分支管道(24-1)连接于所述闭合回路、处于所述冷凝器和所述节约器中间,并具有一包括第一阀(SV-4)、一膨胀装置(34)和所述节约器的流动路径,该分支管道连接于所述压缩机的级间部位,所述***包括一响应区段(或区域)和***输入信息来控制所述***的微处理器(100),所述压缩机包括:
一至少包括两排(LS-1,LS-2)的第一级;
一第二级;
卸载所述第一级的所述排中的一排气缸的装置(SV-1);
卸载所述第一级和第二级两级之一的装置(SV-2,SV-3);
控制所述第一阀的所述微处理器,用来卸载所述排中的一排气缸的所述装置和用来卸载所述第一级和第二级两级之一的所述装置,由此所述***可作单级、用或不用节约器以及卸载或不卸载所述第一级的所述排中的所述一排气缸的两级运行。
2.如权利要求1所述的制冷***,其特征在于,用于卸载所述第一级和第二级两级之一的所述装置卸载所述第一级。
3.如权利要求2所述的制冷***,其特征在于,用于卸载所述第一级和第二级两级之一的所述装置包括一第二阀。
4.如权利要求1所述的制冷***,其特征在于,用于卸载所述第一级和第二级两级之一的所述装置卸载所述第二级。
5.如权利要求1所述的制冷***,其特征在于,所述第一级的所述排具有排出腔,所述第二级具有一吸入腔,所述排出腔和所述吸入腔流体连通。
6.如权利要求5所述的制冷***,其特征在于,所述第二级有一排出腔,所述第一级的所述排出腔与所述的第二级的所述吸入腔通过一流体路径而流体连通,所述流体路径穿过所述第二级的所述排出腔。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/758,837 | 1996-12-02 | ||
US08/758,837 US5768901A (en) | 1996-12-02 | 1996-12-02 | Refrigerating system employing a compressor for single or multi-stage operation with capacity control |
US08758,837 | 1996-12-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1188219A true CN1188219A (zh) | 1998-07-22 |
CN1109864C CN1109864C (zh) | 2003-05-28 |
Family
ID=25053302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN97126038A Expired - Fee Related CN1109864C (zh) | 1996-12-02 | 1997-12-02 | 采用能力可控、可以单级或多级运行的压缩机的制冷*** |
Country Status (11)
Country | Link |
---|---|
US (1) | US5768901A (zh) |
EP (1) | EP0845642B1 (zh) |
JP (1) | JP3053379B2 (zh) |
KR (1) | KR100409174B1 (zh) |
CN (1) | CN1109864C (zh) |
AR (1) | AR008924A1 (zh) |
BR (1) | BR9706031A (zh) |
DE (1) | DE69722146T2 (zh) |
MX (1) | MX9709349A (zh) |
MY (1) | MY119339A (zh) |
TW (1) | TW376428B (zh) |
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- 1996-12-02 US US08/758,837 patent/US5768901A/en not_active Expired - Lifetime
-
1997
- 1997-11-14 EP EP97630079A patent/EP0845642B1/en not_active Expired - Lifetime
- 1997-11-14 DE DE69722146T patent/DE69722146T2/de not_active Expired - Lifetime
- 1997-11-19 MY MYPI97005568A patent/MY119339A/en unknown
- 1997-11-20 TW TW086117371A patent/TW376428B/zh active
- 1997-11-27 BR BR9706031A patent/BR9706031A/pt not_active IP Right Cessation
- 1997-11-28 JP JP9327300A patent/JP3053379B2/ja not_active Expired - Lifetime
- 1997-12-01 MX MX9709349A patent/MX9709349A/es not_active IP Right Cessation
- 1997-12-01 KR KR1019970065001A patent/KR100409174B1/ko not_active IP Right Cessation
- 1997-12-02 CN CN97126038A patent/CN1109864C/zh not_active Expired - Fee Related
- 1997-12-02 AR ARP970105668A patent/AR008924A1/es active IP Right Grant
Cited By (7)
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CN100458308C (zh) * | 2003-04-21 | 2009-02-04 | 开利公司 | 蒸汽压缩***及其操作方法 |
CN100451467C (zh) * | 2006-01-23 | 2009-01-14 | 蒋华 | 一种组合式空气处理方法和装置 |
CN102119274A (zh) * | 2008-08-12 | 2011-07-06 | 开利公司 | 压缩机气缸的专用脉冲阀 |
CN105909495A (zh) * | 2008-08-12 | 2016-08-31 | 开利公司 | 压缩机气缸的专用脉冲阀 |
CN101713599B (zh) * | 2009-11-09 | 2012-06-27 | 刘雄 | 空调热泵装置 |
CN102022851A (zh) * | 2010-12-22 | 2011-04-20 | 天津商业大学 | 双级压缩制冷*** |
CN104697222A (zh) * | 2015-03-06 | 2015-06-10 | 浪潮电子信息产业股份有限公司 | 一种高发热量的云服务器低温试验*** |
Also Published As
Publication number | Publication date |
---|---|
KR100409174B1 (ko) | 2004-03-20 |
DE69722146D1 (de) | 2003-06-26 |
KR19980063651A (ko) | 1998-10-07 |
MY119339A (en) | 2005-05-31 |
MX9709349A (es) | 1998-06-30 |
EP0845642A3 (en) | 1999-12-01 |
DE69722146T2 (de) | 2004-04-08 |
AR008924A1 (es) | 2000-02-23 |
JPH10170083A (ja) | 1998-06-26 |
BR9706031A (pt) | 1999-08-03 |
EP0845642B1 (en) | 2003-05-21 |
TW376428B (en) | 1999-12-11 |
US5768901A (en) | 1998-06-23 |
CN1109864C (zh) | 2003-05-28 |
JP3053379B2 (ja) | 2000-06-19 |
EP0845642A2 (en) | 1998-06-03 |
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