电磁四通换向阀切换压差改善方案分析  

Improvement scheme of differential pressure during reversing process of electromagnetic four-way reversing valve

作　　者：秋雨豪 沈小波 Qiu Yuhao;Shen Xiaobo(Trane Technologies Engineering&Technology Center-Asia Pacific)

机构地区：[1]特灵科技亚太研发中心

出　　处：《制冷与空调》2023年第2期31-34,共4页Refrigeration and Air-Conditioning

摘　　要：从电磁四通换向阀失效样件的拆解分析出发,对其由于切换压差大引起串气的失效模式的产生机制进行研究,并提出在更改空调系统除霜逻辑的基础上,在热力膨胀阀上增加旁通可以有效防范该失效模式的发生。该研究对于电磁四通换向阀以及整个空调系统的可靠性保障具有参考价值。Based on teardown analysis for failure electromagnetic four-way reversing valves, the blow-by failure mechanism caused by large differential pressure during revers-ing process is studied. This failure mode can be avoided by modifying defrosting logic and adding by-pass on existing thermal expansion valve. This study has reference value for improving the reliability of electromagnetic four-way reversing valve and the entire air-conditioning system.

关 键 词：空调 热泵 电磁四通换向阀 热力膨胀阀 切换压差 旁通 

分 类 号：TB6[一般工业技术—制冷工程]