IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0245094
(2002-09-17)
|
우선권정보 |
IT-0000145 (2002-07-02) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
1 |
초록
▼
A centrifugal fan (10) with improved efficiency and decreased noise, comprising a fan housing (12), in the form of a fan housing, with parallel sides (22, 23), which are fixed to opposite edges of a casing scroll (24), and a fan or impeller (25) with blades (27), positioned inside the fan housing (1
A centrifugal fan (10) with improved efficiency and decreased noise, comprising a fan housing (12), in the form of a fan housing, with parallel sides (22, 23), which are fixed to opposite edges of a casing scroll (24), and a fan or impeller (25) with blades (27), positioned inside the fan housing (12), in such as way that it does or does not overlap the end of a inlet cone (26); a flow sharing device element (20), shaped and produced in a single piece (20) or in more than one piece (28, 30), with at least one appendage facing the inlet cone (26), and if necessary overlapping the impeller (25) and extending for the width of the discharge opening (21), in such as way to allow homogenization of the flow delivered and reduction of vortices, which cause high noise and loss of efficiency of the centrifugal fan (10).
대표청구항
▼
1. Centrifugal fan (10) having improved efficiency and decreased noise, comprising at least one fan housing (12), with parallel sides (22, 23), which are fixed to opposite sides of at least one back (24), and at least one fan or impeller (25) with blades (27), positioned inside the fan housing (12),
1. Centrifugal fan (10) having improved efficiency and decreased noise, comprising at least one fan housing (12), with parallel sides (22, 23), which are fixed to opposite sides of at least one back (24), and at least one fan or impeller (25) with blades (27), positioned inside the fan housing (12), so that it does or does not overlap with the terminal of a mouth (26), characterized in that it establishes the use of, at a discharge opening (21) of the fan (10), arranged radially along the spiral of the fan housing (12) and the circumference of the mouth (26), a shaped stabilizer element (20), produced in a single piece (28) or more than one piece (30), with at least an appendage (30) facing the mouth (26), said shaped element (20) being suitable to allow separation of the flow rates and capable of determining homogenization of the flow at the outlet of the fan (10) and a decrease in vortices, responsible for high noise and loss of efficiency of the fan (10) wherein said shaped stabilizer element (20) has at least an appendage (30) fixed to said mouth (26).2. Centrifugal fan (10) as claimed in claim 1, wherein said shaped stabilizer element (20) has at least an appendage (30) positioned at said mouth (26).3. Centrifugal fan (10) as claimed in claim 1, wherein the appendage (30) may overlap the impeller (25).4. Centrifugal fan (10) as claimed in claim 1, wherein said fan (10) has at least a system (16) for transmitting power to the motor and at least a deflector (17), positioned at the outlet (21).5. Centrifugal fan (10) as claimed in claim 1, wherein said fan or impeller (25) is provided with a series of blades (27) and may or may not overlap the end of the mouth (26), which is riveted, bolted or welded to at least one of said sides (22, 23).6. Centrifugal fan (10) as claimed in claim 1, wherein said shaped stabilizer element (20) has a series of perforations (29) arranged appropriately in specific portions of the element (20) or the pieces (28, 30) of which said element (20) is composed.7. Centrifugal fan (10) as claimed in claim 1, wherein at least one portion (30) of the stabilizer element (20) may have a curvature radius and a specific form, so that it fully or partially overlaps the front disc of the fan (25).8. Centrifugal fan (10) as claimed in claim 1, wherein said shaped element (20) is filled with noise insulating material, such as rock wool or foamed polyurethane.9. Centrifugal fan (10) as claimed in claim 1, wherein said appendage (30) may have at least one portion (28, 30) with a projecting part (31, 32, 34).10. Centrifugal fan (10) as claimed in claim 1, wherein said shaped stabilizer element (20) is composed of at least a first portion, forming a deflector of triangular or generic form, positioned at the outlet (21) of the fan (10) and of at least two second portions (35), appropriately shaped, fixed at parts adjacent to said mouth (26).
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