Inside of the housing of the photo above is an EXAIR Full Flow Air Knife. The housing serves as a shield to a condenser on a specially built machine for one of the Big Three U.S. auto manufacturers. The purpose of the air knife within the housing is to supplement heat removal by passing large volumes of ambient air over the condenser, thereby helping to return the gaseous fluid to a liquid state.
When compressed air was supplied to the air knife in this photo, there was very little airflow. Knowing that there was something amiss, and that an Application Engineer could offer potential solutions, the OEM called in to EXAIR.
Immediately upon seeing the photo, the root cause of the problem was evident. There was no ambient air available for the air knife to entrain. It looks like an attempt was made to open the housing *in the bent edges at the top of the housing), but it was not enough.
Removing the housing from the machine revealed the following internal installation.
With such a setup, there was no entrainment of ambient air, and the total airflow was only a fraction of what it should be. Removing the current shield and fabricating an alternate design which allows ambient airflow solved the problem in this application. Compressed air use remained low, and total airflow was increased by 3000%.
EXAIR products keep compressed air use low and performance to a maximum. For help with your application, contact an EXAIR Application Engineer.