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一、前言+ y( B( _, u9 }
In recent years, to protect the air the ozone layer, use R22 alternative as R12? Is a method. And in all types of refrigeration compressor, piston compressor is the first came out, still widely applied a type, no doubt because it has a series of other types of compressors beyond the advantages:
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1.能适应较广阔的压力范围和制冷量要求;; y4 t' Q# M8 j+ y6 P7 z5 F
: S* N' \4 L8 Y3 Z1 Q1 C% P7 l& b 2.热效率较高,单位耗电量较少,特别是气阀的存在使偏离设计工况运行时更为明显;
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2 x2 F; }" Q# ~ N8 k! v9 L 3.对材料要求低,多用普通钢铁材料,加工比较容易,造价也较低廉;
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4.技术上较为成熟,生产使用上积累了丰富的经验;+ L3 g5 u: A6 a# f
* v5 W$ t' @9 V6 z 5.装置系统比较简单。
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+ p; O8 F; L* E7 j% r The piston compressor of the above features make it in all kinds of refrigeration and air conditioning equipment, especially in the amount of range, xiao leng become in the refrigerator of the most widely used, production batch's largest a model.
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( F' J% F1 L Z5 B 二、使用范围+ c. _8 W: Y0 E0 ~$ [. T* m3 ]
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COPELAND L型半封闭压缩机所用工质为R22、R502、R404A、R507及R134a,蒸发温度范围-40℃~-5℃,空气冷却型设计,针对商用冷冻使用,可在水温及低温范围内广泛应用。7 p/ s4 N- P* t8 H
) c( R+ S& b/ ~8 G SANYO半封闭压缩机所用工质为R22,蒸发温度范围-40℃~-5℃,冷凝温度30℃~54.4℃,排气温度130℃以下,吸气温度18℃以下,采用空气冷却电机壳外壁。Bitzer半封闭压缩机采用R22、R134a、R404A和R507为工质,可应用于空调、中温和低温冷却,蒸发温度范围-50℃~15℃,采用风机附加冷却(低温时喷液冷却), Bitzer半封闭压缩机使用R22的工作范围。/ [' [! @2 M. l) r5 Z+ [
8 S) g% D, }8 q 三、性能比较
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COPELAND L型半封闭压缩机系风冷型、多工质通用、具有宽广应用范围的压缩机,其散热面积大,摩擦和振动小,润滑可靠,电子式电机保护,体积小,噪声低,制冷量大,效率高,经过全世界超过两百万台安装应用实例的检测和验证。5 p8 D! U! k8 W: V5 ^0 t2 k! g
0 p2 R9 f4 r5 Z SANYO半封闭压缩机由SANYO电机开发。使用R22为工质,体积效率高,冷却性能优异,无须双级压缩及喷液冷却,仅靠风冷即可在-5℃~-40℃的蒸发温度范围内工作;低噪音、少振动设计,加工技术优秀,可靠性高。
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Bitzer semi-closed compressor using high quality materials and parts, structure, increase the reliable durable, high capacity, core motor COP value big, wide range of operation.
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SANYO半封闭压缩机(额定输出功率7.5HP、4HP)与Bitzer半封闭压缩机(电机输出功率5.5HP和2HP)COPELAND半封闭压缩机(电机功率3HP和5HP)制冷量、输出功率和制冷系数的比较。
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COPELAND与SANYO压机的冷量曲线很接近,变化相似,而BITZER压机冷量曲线变化较平坦,随to上升,Qo增加较慢;BITZER压机冷量曲线变化较陡,随to上升,Qo增加较快,所以不同容量的压机,变化并不完全一样。
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BITZER压机功率曲线变化较平缓,随to上升,Pe增加较慢,而SANYO的压机功率曲线变化较陡,随to上升,Pe增加稍快;BITZER和COPELAND压机功率变化较相似,SANYO压机功率曲线变化较平坦,随to上升,Pe增加慢。所以不同容量的压机,变化并不完全一样。
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W4 F1 D4 I# v BITZER压机COP曲线变化较缓,随to上升,COP增加较慢,而图9中,BITZER压机的COP曲线变化较陡,随to上升,COP增加较快,但BITZER和COPELAND压机的COP值很接近。SANYO压机COP曲线变缓,随to上升,COP值增加变慢,而图9中,COPELAND和SANYO压机COP曲线变化相似,但两者相差一定的值,总之,COPELAND与BITZER半封闭压机性能相近,都稍好于SANYO半封压机性能。产生的原因一方面是机器性能稍有不同,另一方面是压机测试工况也不完全一样。不过同类型的压缩机性能相差不大。另外,随制冷压缩机的容量增大,相应其COP值也上升。
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Will tell from property, using the low temperature of R22 easy to produce high temperature exhaust compressor of phenomena, especially air-cooled type. So the past with less often. Now with the technological development, by some measures, the low temperature compressor R22 completely feasible. To take the measures of the usually have expanded heat surface, strengthening cooling, restricted to breathe in temperature, breathe in spray liquid, reliable lubrication and perfect protection function etc.
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值得注意的是,压缩机划分时,有时以HP大小来分类,但由于测试工况不完全相同,输入电机功率不同和输出电机功率不同,造成压缩机划分时出现冷量差距较大(或标称不同HP的压缩机冷量相同),实际上各厂生产的同类型压缩机性能差别不大。, A2 }7 c( x6 V2 K. `
+ h$ T( K4 E3 T: r 目前所用SANYO、COPELAND和BITZER半封机冷量范围不同,其单机最大容量可达40HP,广泛应用于冷库、陈列柜和冷藏柜等。可以预计随着技术的不断进步,使用R22的半封机容量范围可进一步扩大,应用领域会更加广泛。; K" a7 e; \9 R/ ?
- _, |( M4 O2 F' Q/ p+ _' L& \1 e( r 四、结论
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In contrast with the now commonly used SANYO semi-closed compressor, COPELAND semi-closed compressor and Bitzer semi-closed refrigerating capacity of the compressor, the input power of the COP, and performance. The low temperature and a half of R22 closure machines has developed very mature and can fully application in low temperature range, which alternative as R12?; At present there under low temperature of sealing machine use R22 half range in volume has is very wide, application scope has been used widely, also more and more widely. In addition, SANYO semi-closed compressor, COPELAND semi-closed compressor, Bitzer semi-closed compressor performance quite.
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+ ^1 r# B+ B% ]5 g本文整理分享来自:螺杆式空压机 (.shunlico点com) 转载时必须以链接形式注明作者和原始出处! |
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