Air diffuser for a HVAC system
View Patent ↗A diffuser for carrying air flow to an evaporator in an air conditioning system of an automotive vehicle includes an inlet and an outlet, a wall extending between the inlet and the outlet, and a guide vane, extending at least partially between the inlet and the outlet, spaced from the wall by a containing a control region whose area ratio changes along a length of the guide vane.
1. A diffuser for carrying air flow to an evaporator in an air conditioning system of an automotive vehicle, comprising:
an inlet;
an outlet located downstream from the inlet;
a wall extending between the inlet and the outlet; and
a guide vane including a surface that extends at least partially between the inlet and the outlet, spaced from the wall by a control region whose area ratio changes along a length of the guide vane, and having a height that changes along a length of the guide vane such that a ratio of a difference between a maximum height and a minimum height of the guide vane, and a length of the guide vane is in a range between 0.2 and 1.0.
2. The diffuser of claim 1 further comprising:
a second guide vane extending at least partially between the inlet and the outlet, spaced from the guide vane by a second control region whose area ratio changes along a length of the second guide vane.
3. The diffuser of claim 1 wherein a first tangent to a surface of the guide vane at the inlet end and a second tangent to a surface of guide vane along a length of the guide vane produce an angle of at least eight degrees.
4. The diffuser of claim 1 wherein a surface of the guide vane has a curvature that changes between convex and concave such that at least a portion of the guide vane has a S-shape.
5. The diffuser of claim 1 wherein a surface of the guide vane is substantially parallel to the flow at the inlet.
6. The diffuser of claim 1 wherein the guide vane is secured to an upper surface.
7. The diffuser of claim 1 wherein the guide vane is secured to a lower surface.