FeedtheNeed
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For full understanding of the issues, read the thread.
Courtesy of Droid_Junky, a synopsis:
Courtesy of Droid_Junky, a synopsis:
YES, THE SEATBACKS ARE SUPPOSE TO COOL JUST AS THE BOTTOM CUSHION COOLS. THE SEATBACK DOESN'T COOL BECAUSE OF A POOR DESIGN.
While investigating the issue we have learned that the issue with the seatback is that the inlet fan is forced to recirculate the air from within the back of the seat because it has no way of getting air from the cabin. The bottom cushion that works quite well does have access to cabin air.
(pic of Peltier device outside the seatback producing cooled air for over 30 minutes with no signs of warming)
The seats are cooled and heated by a Peltier device. The inlet fan blows air across the two plates of the Peltier device. One side of the device is cooled while the other side produces exhaust heat. The fan does blow across each side at the same time. What is supposed to happen is the cooled air is pushed through the rubber duct to the perforations of the seat. The exhaust side blows hot air inside the back of the seat and based on the way it is currently designed, it is expected that the hot air escapes out the back perforations of the seat. It seems that most of the exhaust heat remains trapped in the back of the seat. This hot air is recirculated through the Peltier device and significantly reduces the cooled air side. There are several reports that the seatback actually begins to increase in temperature.
(pic of Peltier device installed. Cooled air should flows through rubber duct (blue lines), hot exhaust out the back(red lines))
THERE IS ALSO THE QUESTION OF WHERE ON THE SEATBACK SHOULD WE FILL COOL AIR?
This can be answered by testing the heating option of the seat. If you turn the heat on to the seat you can feel every part of the seat that gets warm. Technically this same area that is warmed by the heat option, should also feel cooled with the cooled option. We have verified that during normal heated seat operation, the heat that is felt on the seats is produced from the same Peltier device. The air blows through the same perforations of the seat. This option works very well.
A temporary duct was tested on the device to allow air from the cabin and the results were promising. The seat feels cools for the first time this summer. This failed after two weeks because the heat is still too much for the duct tape to hold!!! WE NEED A PERMANENT SOLUTION FROM FORD!
(other pics of the device and wiring)
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