发明名称 |
SUPPRESSION OF BLADE PASSING FREQUENCY TONE IN AUTOMOTIVE AIR HANDLING SYSTEM. |
摘要 |
A noise tone occurring at a blade passing frequency in a blower for an automotive HVAC system is suppressed. The blower includes a centrifugal fan and a scroll body disposed around the fan. An outlet extends from the scroll body to conduct an air flow from a cutoff point of the scroll body. An inlet is coupled to the scroll body defining an inlet throat comprising an arcuate ring extending between a base and an annular end coaxially disposed over the fan. A partial-perimeter wall extends upstream from the arcuate ring having a height between about 4% and about 6.5% of an inner diameter of the annular end. The wall spans a perimeter portion of the circumference of the throat between about 120° and about 180°. As a result, noise at the blade passing frequency is suppressed without any significant reduction in air flow. |
申请公布号 |
MX2015000294(A) |
申请公布日期 |
2015.07.17 |
申请号 |
MX20150000294 |
申请日期 |
2015.01.08 |
申请人 |
FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
LIU, ZHENGYU;JONES, CURTIS M.;AZAR, JOHN |
分类号 |
G10K11/16;B60R13/08 |
主分类号 |
G10K11/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|