Anti-backflow device for fan unit
First Claim
Patent Images
1. An anti-backflow device for a fan unit that includes a mounting frame with an air outlet, the anti-backflow device fabricated by cutting a rectangle thin plate and comprising:
- a plate body adapted to be attached to the mounting frame of the fan unit, said plate body defining an air outlet in communication with the air outlet of the mounting frame to permit air outflow upon activation of the fan unit;
anda plurality of first blades arranged in a parallel manner relative to one another in the width direction of the air outlet of the plate body, each of the first blades has two opposite connecting arms that extend in a longitudinal direction of the the air outlet of the plate body and that are adjacent to two opposite lateral sides of an adjacent one of said parallel first blades and two connecting holes formed on two ends of the connecting arms,wherein the plurality of connecting arms and the plurality of first blades are fabricated by cutting the rectangle thin plate,wherein the plurality of connecting arms rotate at the connecting holes to permit turning of the plurality of first blades outward with respect to the air outlet of the plate body.
1 Assignment
0 Petitions
Accused Products
Abstract
An anti-backflow device for a fan unit, which is fabricated by cutting a rectangle thin plate, includes: a plate body defining an air outlet to permit air outflow upon activation of the fan unit, and having at least two inner peripheral sides; a plurality of connection arms; and a plurality of blades. Each blade is connected a pair of the connection arms, which are in turn connected to two connecting holes formed in the inner peripheral sides of the plate body.
5 Citations
17 Claims
-
1. An anti-backflow device for a fan unit that includes a mounting frame with an air outlet, the anti-backflow device fabricated by cutting a rectangle thin plate and comprising:
-
a plate body adapted to be attached to the mounting frame of the fan unit, said plate body defining an air outlet in communication with the air outlet of the mounting frame to permit air outflow upon activation of the fan unit; and a plurality of first blades arranged in a parallel manner relative to one another in the width direction of the air outlet of the plate body, each of the first blades has two opposite connecting arms that extend in a longitudinal direction of the the air outlet of the plate body and that are adjacent to two opposite lateral sides of an adjacent one of said parallel first blades and two connecting holes formed on two ends of the connecting arms, wherein the plurality of connecting arms and the plurality of first blades are fabricated by cutting the rectangle thin plate, wherein the plurality of connecting arms rotate at the connecting holes to permit turning of the plurality of first blades outward with respect to the air outlet of the plate body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification