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那些“泄密者”都去哪了?

沃德·阿特金森,MACS技术顾问

据说在R-12时代, A/C system engineers sometimes used “Band Aid” fixes to address A/C system issues.

Speaking as one of those early engineers, there is some truth in that. System refrigerant charges then were very large compared to those today. Those systems were expected to leak refrigerant and still continue to provide cooling for an acceptable interval before more refrigerant had to be added.

当然, all that was back before environmental threats became recognized and the role of refrigerants such as R-12 were linked to ozone depletion and R-134a to global warming.

2003年雪佛兰英帕拉的历史 创建日期:10/2002 R-134a系统原厂费用:992克(35盎司.) First Service 2009 at 6-3/4 Years (Poor Cooling): Recovered 454 grams (16 oz.6-3/4年的系统排放:79克/年. (2.8 oz.) 2012年(软管泄漏):未回收制冷剂 寿命9-3/4年制冷剂总损失:1530克(54盎司.); 157 g/yr. (5.5 oz.)

2003年雪佛兰英帕拉的历史
创建日期:10/2002
R-134a系统原厂费用:992克(35盎司.)
First Service 2009 at 6-3/4 Years (Poor Cooling): Recovered 454 grams (16 oz.)
6-3/4年的系统排放:79克/年. (2.8 oz.)
2012年(软管泄漏):未回收制冷剂
寿命9-3/4年制冷剂总损失:1530克(54盎司.); 157 g/yr. (5.5 oz.)

所有这些都随着R-12到R-134a的转变而改变. OE engineers and their Tier One suppliers revisited system and component designs, which resulted in mobile A/C systems that leak much less refrigerant and last much longer before any component failures.

Anecdotal evidence of improvements in system design to reduce refrigerant leakage is demonstrated through two vehicles operating in the Phoenix, AZ, 并由汽车维修公司提供服务.

One major initiative that contributed to these improvements was the I-MAC (Improved Mobile Air Conditioning) Program, which was facilitated through an SAE International Cooperative Research Program (CRP). 这个项目是由政府和工业界资助的.

One of the I-MAC goals was to reduce refrigerant system emissions. Reducing the system charge will result in lower emissions when the complete charge is lost due to system damage or failure of component parts. The data in this figure compares system charge amounts from 1990 to 2013. Some of the typical R-134a refrigerant charge amounts for 2015 systems range from 0.36Kg (12.69 oz.) to 0.7Kg (24.69 oz.)用于单蒸发器系统.

One of the I-MAC goals was to reduce refrigerant system emissions. Reducing the system charge will result in lower emissions when the complete charge is lost due to system damage or failure of component parts. The data in this figure compares system charge amounts from 1990 to 2013. Some of the typical R-134a refrigerant charge amounts for 2015 systems range from 0.36Kg (12.69 oz.) to 0.7Kg (24.69 oz.)用于单蒸发器系统.

MACS was specifically tasked to address service equipment that reduces refrigerant emissions during service and repair of mobile A/C systems. 这包括制冷剂回收的改进, recycling and charging equipment for removal of refrigerant from the A/C system at the time of service, 并提供更准确的制冷剂充注量. Another part of that work was to promote improvement of electronic leak detectors, which enabled technicians to identify smaller leaks in the A/C system. 另外, 苹果电脑提供研究, outreach and education designed to reduce refrigerant emissions through proper recovery when vehicles are scrapped.

工作改进kok体育安卓版下载空调系统, 组件, service equipment and new mobile A/C systems continues under the stewardship of SAE International’s Interior Climate Control Standards Committee.

随着kok体育安卓版下载空调系统的不断发展, 空调服务中心的重点发生了重大变化. Back in the day, it was all about the A/C refrigerant circuit and 组件. 但现在,情况并非如此.

Improper service by either unprofessional service shops or do-it-your-selfers with quick-fix 干预措施 using something in a can may still foul up the A/C system refrigerant circuit. The manufacturers and sellers of A/C compressors have plenty to say about this.

Today’s focus for service shops is much more about electronic controls, 以及越来越多的车载电脑, which all have some say as to whether the vehicle A/C can operate (or not).

Our little corner of the automotive world continues to evolve but unfortunately, things are getting no easier for the service techs that have to troubleshoot and repair the A/C system.

If you’re a service professional and not a MACS member yet, you should be!

Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit http://bit.ly/10zvMYg 的更多信息.

你可以给kok体育安卓版下载发电子邮件 macsworldwide@macsw.org .

找到一个 kok体育安卓版下载空调学会 kok体育安卓版下载维修店在你的地区.

点击这里 to find out more about your car’s mobile A/C and engine cooling system.

Mobile A/C professionals should plan to attend MACS 2017 kok下载安卓版 Event and Trade Show, 2月15日至18日在阿纳海姆万豪酒店, CA.

点击这里 查看MACS目前的公共训练时间表.

MACS网站载于 www.macsw.org

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