Fan and shroud assembly adopting the fan

• US 6,027,307 A
• Filed: 06/04/1998
• Issued: 02/22/2000
• Est. Priority Date: 06/05/1997
• Status: Expired due to Term

• Current Assignee: Hanon Systems (Hahn & Co. Auto Holdings Co. Ltd.)
• Original Assignee: Halla Climate Control Corporation (Hahn & Co. Auto Holdings Co. Ltd.)
• Inventors: Cho, Kyung-seok, Park, Tae-young, Kim, Jong-yeol, Kim, Ki-hyo
• Primary Examiner(s): Look, Edward K.
• Assistant Examiner(s): NGUYEN, NINH H
• Application Number:
  US09/090,846
• Time in Patent Office: 628 Days
• Field of Search: 415/119, 415/173.5, 415/173.6, 415/228, 415/211.1, 415/211.2, 416/189, 416/192, 416/169 A, 416/195
• US Class Current: 415/173.5
• CPC Class Codes: F04D 29/164 of an axial flow wheel
• CPC Class Codes: F04D 29/326 comprising a rotating shroud

Abstract

A fan includes a hub coupled to a driving shaft of a motor, a plurality of blades installed on the outer circumferential surface of the hub to be spaced from each other at a predetermined interval, and a band connecting free ends of the blades. An axial direction width (W1) between a leading edge and a trailing edge at the free end of each of the blades is greater than a width (W2) of the band.

Claims

1. A fan comprising:

a hub coupled to a driving shaft of a motor;

a plurality of blades installed on the outer circumferential surface of said hub to be spaced from each other at a predetermined interval with a setting angle of a free end of each blade being within a range of 18°

22°

;

a band connecting the free ends of said blades and coupled to a trailing edge of the free end of each blade and having an axial direction width (W2) smaller than an axial direction width (W1) between a leading edge and a trailing edge of the free end of each blade and at least one-half the axial direction width (W1), the leading edge of the free end of each blade protruding from said band; and

a flange extending outward from a circumferential portion of said band at one of an air inflow side and an air outflow side.

2. The fan as claimed in claim 1, wherein a relationship between said axial direction-width (W1) and said band-width (W2) is about 0.6W1≦

W2<

0.8W1.

3. A shroud assembly comprising:

a driving motor;

a fan having a hub coupled to a driving shaft of said motor, a plurality of blades installed on the outer circumferential surface of said hub to be spaced from each other at a predetermined interval with a setting angle of a free end of each blade being within a range of 18°

-22°

, a band connecting the free ends of said blades and coupled to a trailing edge of the free end of each blade and having an axial direction width (W2) smaller than an axial direction width (W1) between a leading edge and a trailing edge of the free end of each blade and at least one-half the axial direction width (W1), the leading edge of the free end of each blade protruding from said band, and a flange extending outward from a circumferential portion of said band at one of an air inflow side and an air outflow side; and

a shroud supporting said driving motor and having a housing portion for housing said blades and said band.

4. The shroud assembly as claimed in claim 3, wherein a relationship between said axial direction-width (W1) and said band-width (W2) is about 0.6W1≦

W2<

0.8W1.

5. The shroud assembly as claimed in claim 3, further comprising:

an air flow guiding portion for guiding a flow of the air, extending from the inner surface of said housing portion toward said flange.

6. The shroud assembly as claimed in claim 3, further comprising a guide portion which extends from said housing portion.