[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4762: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3897)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4764: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3897)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4765: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3897)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4766: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3897)
土豪乐潭 We the Landlords • 查看主题 - 周末 灌水,老瞎瞎说:忽悠空调用的制冷剂R22 vs R410A及系统要求

周末 灌水,老瞎瞎说:忽悠空调用的制冷剂R22 vs R410A及系统要求

取百家精华而自成一家

版主: 小心翼翼的小地主, jy101, 瞎问瞎说

周末 灌水,老瞎瞎说:忽悠空调用的制冷剂R22 vs R410A及系统要求

帖子瞎问瞎说 » 2014-05-16 19:08

周末 灌水,老瞎瞎说:忽悠空调用的制冷剂R22 vs R410A及系统要求

和以往一样,老瞎的Life就是忽悠吹牛,先忽悠了公司的W2(挣饭钱养家糊口),再来忽悠地主朋友们(免费过瘾)。

天气慢慢热起来了,空调的使用也多起来了,用得多,也就坏的多。来咨询空调问题的也就多起来了这几年由于环境保护法的变化,相关建筑规范也随之在调整,相关HVAC规范最重要的变化就是关于用于空调系统的制冷剂的规定的变化。古时候最常用的制冷剂是R22。现在是一个过渡阶段,今后R22会慢慢地被R410A逐步取代直到完全被禁止使用。问题是在这个过渡阶段,我们面对变化需要如何决定应对,做出正确的选择。

今天的忽悠就是针对R22和R410A两种制冷剂的不同以及它们对应的制冷系统的不同开侃。

常见家用空调制冷系统常识:
常见家用空调制冷系统由这样几部分构成,制冷剂压缩机(compressor);冷凝器(condenser);节流器(restrictor);蒸发器(evaporating coil)起着换热器(heat exchanger)作用 。工作原理是由制冷剂压缩机将制冷剂压缩成高压饱和气体,让制冷剂经过冷凝器冷凝成液体,通过节流器节流后,送入蒸发器和空气热交换为空气降温,冷却了的空气被风机强制送到需要的房间;室内热风通过回风系统送回到蒸发器(evaporating coil)完成风的循环。蒸发器(evaporating coil)中的制冷剂换热后变成低压蒸汽被送到室外的制冷剂压缩机(compressor)先换热降一部分温,再压缩成高压饱和气体,完成制冷剂循环。周而复始,就慢慢把室温降下来了。

制冷剂常识:
常见制冷剂有氨(Ammonia);常见于商用老式制冷系统,效率低,不利于环保,有刺激性臭味,早就被R22替代了,在中国的老式系统中仍为常见。再就是更新的R401A。其他种类还有很多,比如R12, R32,R134A,R152A, R600A,H-01, RH,R404, R401。因为在美国做地主时不常和这些制冷剂打交道,就此略过。有兴趣的朋友自己去狗来学习吧。:)

R22: 俗称佛里昂(Freon),这并不是产品名称,而是品牌名称,其产品名称为氢化氯氟烃(hydro-chlorofluorocarbon)。在美国,从2010年起,R22已经因为其对大气臭氧层的破坏被要求禁止在任何新的空调系统中使用了。

R410A:是一种用来替代R22的制冷剂。人们常称其为Puron这也不是产品名,而是品牌名。R410A是一种有机氟(Organofluorine),五氟乙烷(Pentafluoroethane),由于其制冷效率高于R22而且对臭氧层损害相对较小为成为R22的替代品。很重要的是R410A是两种制冷剂的混合产品(这会严重影响制冷剂补充费用)。到了2015年,R410A将成为美国制冷剂的新标准。

R32:不懂也没查到是什么东西制成的制冷剂,号称对臭氧层完全没影响,是中国选定的新一代制冷剂替代品,不明白为什么美国不选这种产品。敬请坛子里面老瞎无限敬仰的化学大牛们给大家启蒙扫盲。

由于R410A的热容量大于R22,所以使用R410A的系统可以工作较少的时间取得同样的制冷效果,这是为什么R410A系统压缩机可以比用R22的压缩机更长寿制冷效率更高。不过R410A系统的工作压力远大于R22系统,所以R22系统不能简单换用R410A制冷剂。

根据目前的规定,使用R22的制冷系统已于2010年停止生产,但是系统零备件以及制冷剂还会被继续生产供应直到2030年。问题是随着时间的推移,R22系统的零备件会越来越少,制冷剂生产也会越来越少,如果需求大于供给,价格就会被不断推高。

目前,R410A费用高于R22,系统工作于更高压力,所以R410A系统费用会高一些。

为什么用R410A更换代替系统内的R22比较贵呢?因为要先更换耐压低的系统部件,另外R410A内含的润滑剂对水很敏感,更换R410A时必须把系统抽成较高真空度的真空,并保持一段真空,等系统水分以及残余R22完全抽走,并确保系统无泄漏才能将R410A充入系统内。这是为什么不容易DIY。

再者注意:因为R410A是两种制冷剂混合而成,一旦R410A发生泄漏,比如说只剩50%时,不能简单补充R410A,必须抽掉系统内剩余R410A,然后完全重新灌装。

又忽悠了一大篇,信息不保证准确,请自行学习或者向专业人士咨询。

谢谢阅读。粥沫鱼块!

多余的声明:本文版权属于瞎问瞎说,转帖转载请注明。谢谢!
瞎问瞎说
 
帖子: 84
注册: 2014-04-22 8:32

DDD!!!!

帖子jy101 » 2014-05-16 19:45

410a is down to $80-90 a jar now... and R22 is near $400 retail.
jy101
 
帖子: 640
注册: 2014-04-16 21:57

谢谢大作,拜读了!长知识!

帖子玉米地 » 2014-05-16 21:09

谢谢大作,拜读了!长知识!
一直想去拿一做空调的执照,不知道老瞎有没有这方面的知识?也给科普一下好吗?
玉米地
 
帖子: 73
注册: 2014-05-03 15:32

Re: 谢谢大作,拜读了!长知识!

帖子小心翼翼的小地主 » 2014-05-16 21:15

小心翼翼的小地主
小心翼翼的小地主
 
帖子: 600
注册: 2014-04-16 19:15

Re: 周末 灌水,老瞎瞎说:忽悠空调用的制冷剂R22 vs R410A及系统要求

帖子ecbb » 2014-05-16 21:36

瞎哥太专业了,小翼拜托拜托,不要样样都会好不好,已经是漂亮的女超人了。 @onion25@ @onion25@ @onion25@ @onion37@ @onion37@ @onion37@
头像
ecbb
 
帖子: 199
注册: 2014-04-16 20:21

Re: 谢谢大作,拜读了!长知识!

帖子瞎问瞎说 » 2014-05-16 23:08

瞎问瞎说
 
帖子: 84
注册: 2014-04-22 8:32

顶老俠大作!

帖子梁山 » 2014-05-17 1:11

跟帖在下
最后由 梁山 编辑于 2014-05-17 1:23,总共编辑了 1 次
梁山
 
帖子: 106
注册: 2014-05-07 23:19

Re: 周末 灌水,老瞎瞎说:忽悠空调用的制冷剂R22 vs R410A及系统要求

帖子瞎问瞎说 » 2014-05-17 9:46

谢谢梁山老大捧场助力!
瞎问瞎说
 
帖子: 84
注册: 2014-04-22 8:32


回到 百家精华

在线用户

正在浏览此版面的用户:没有注册用户 和 7 位游客

cron