Silencer structure

Abstract

A silencer structure connected to an air duct includes a housing having two open ends and an accommodating chamber. The housing extends along an extending direction. At least one noise-reducing module is provided in the accommodating chamber and includes two spaced first noise-reducing plates extending along the extending direction. Respective two ends of the two first noise-reducing plates are connected to two fixing plates. A first cavity is formed between the two first noise-reducing plates. At least one second noise-reducing plate is provided in the first cavity. The second noise-reducing plate is perpendicular to the first noise-reducing plates and the extending direction. Each first noise-reducing plate is formed with a plurality of micro-perforations. Each micro-perforation is perpendicular to the extending direction. Each micro-perforation has a diameter less than a thickness of the first noise-reducing plates. The housing may be deflected at an angle relative to the air duct.

What is claimed is: 
     
         1 . A silencer structure, comprising:
 a housing having two open ends, the housing including an accommodating chamber therein and extending along an extending direction for guiding an air flow and a sound wave to flow along the extending direction;   at least one noise-reducing module, provided in the accommodating chamber, comprising:   two first noise-reducing plates that are spaced apart from each other, the two first noise-reducing plates extend along the extending direction, respective two ends of the two first noise-reducing plates being connected to two fixing plates, a first cavity being formed between the two first noise-reducing plates; each of the first noise-reducing plates being formed with a plurality of micro-perforations, each of the micro-perforations being perpendicular to the extending direction, the micro-perforations each having a diameter less than a thickness of the first noise-reducing plates;   at least one second noise-reducing plate, provided in the first cavity, the second noise-reducing plate being perpendicular to the first noise-reducing plates and the extending direction, a plurality of first noise-reducing spaces being formed between the first noise-reducing plates and the second noise-reducing plate.   
     
     
         2 . The silencer structure as claimed in  claim 1 , wherein either side of the accommodating chamber is provided with a side noise-reducing module, the side noise-reducing module includes a side noise-reducing plate having the same structure as the first noise-reducing plates, the side noise-reducing plate is spaced apart from the housing by a second cavity, two ends of the side noise-reducing plate are respectively connected to side fixing plates fixed to the housing. 
     
     
         3 . The silencer structure as claimed in  claim 2 , wherein the second noise-reducing plate has the same structure as the first noise-reducing plate, and an axial direction of micro-perforations of the second noise-reducing plate is in the same direction as the extending direction. 
     
     
         4 . The silencer structure as claimed in  claim 2 , wherein the second cavity is provided with at least one fourth noise-reducing plate, the fourth noise-reducing plate is perpendicular to the side noise-reducing plate and the extending direction, and a plurality of second noise-reducing spaces are formed between the side noise-reducing plate and the fourth noise-reducing plate. 
     
     
         5 . The silencer structure as claimed in  claim 4 , wherein the fourth noise-reducing plate has the same structure as the first noise-reducing plate, and an axial direction of micro-perforations of the fourth noise-reducing plate is in the same direction as the extending direction. 
     
     
         6 . The silencer structure as claimed in  claim 1 , wherein the first noise-reducing space is provided with at least one third noise-reducing plate, the third noise-reducing plate has the same structure as the first noise-reducing plates, the third noise-reducing plate is perpendicular to the first noise-reducing plates and the second noise-reducing plate and is parallel to the extending direction, and micro-perforations of the third noise-reducing plate are perpendicular to the extending direction. 
     
     
         7 . The silencer structure as claimed in  claim 3 , wherein the first noise-reducing plates, the second noise-reducing plate and the third noise-reducing plate are flat plates. 
     
     
         8 . The silencer structure as claimed in  claim 2 , wherein the extending direction of the housing is in the form of a straight line. 
     
     
         9 . The silencer structure as claimed in  claim 2 , wherein the first noise-reducing plates and the side noise-reducing plate are curved plates extending in a bending direction. 
     
     
         10 . The silencer structure as claimed in  claim 2 , wherein the housing has a solid surface. 
     
     
         11 . The silencer structure as claimed in  claim 2 , wherein the housing is assembled to an air duct, the housing is deflected at an angle of 90 degrees relative to the air duct.