# US 7,607,886 B2 · Heat-dissipating device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,886 B2 - Document ID: US7607886B2 - Status: Granted - Kind: B2 - Application number: 11/150,178 - Filed: 2005-06-13 - Published: 2005-11-24 - Granted: 2009-10-27 - Earliest claimed: 2004-05-19 - Assignees: Delta Electronics, Inc. - Inventors: Wei-Chun Hsu; Shun-Chen Chang; Wen-Shi Huang; Hsiou-Chen Chang - Web page: https://patentgrep.com/patent/US7607886B2 ## CPC - F04D 29/281: {for fans or blowers} - F04D 25/0606: {the electric motor being specially adapted for integration in the pump} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract A heat-dissipating device includes a housing having at least one opening, and a rotor disposed in the housing and having a base, a hub, a first set of blades disposed around the hub, and a second set of blades disposed on the base for increasing air volume and stabilizing a blast pressure of airflow passing through the heat-dissipating device. ## Claims ### Claim 1 A heat-dissipating device, comprising: a housing having at least one opening; a rotor disposed in the housing and having a base, a hub; a first set of blades disposed around the hub, and a second set of blades disposed on the base; and a driving device disposed inside the hub, wherein the housing has a sidewall and a flange radially extending from the bottom of the sidewall to define an entrance of an air-gathering chamber, the entrance is between the flange and the bottom of the housing, and the air-gathering chamber is between the sidewall and a peripheral wall of the housing, and wherein an outermost end of the flange is vertically aligned with an outermost end of at least one of the first set of blades and the second set of blades. ### Claim 2 (depends on 1) The heat-dissipating device of claim 1, wherein the first set of blades extends downward from a periphery of the hub to a surface of the base. ### Claim 3 (depends on 2) The heat-dissipating device of claim 2, wherein the first and second sets of blades are alternately arranged. ### Claim 4 (depends on 1) The heat-dissipating device of claim 1, wherein the first and second sets of blades are correspondingly partially connected with each other. ### Claim 5 (depends on 1) The heat-dissipating device of claim 1, wherein the first and second sets of blades are shaped as curved or airfoil structures, respectively. ### Claim 6 (depends on 1) The heat-dissipating device of claim 1, wherein the first and second sets of blades are correspondingly connected with each other and bent to different directions. ### Claim 7 (depends on 1) The heat-dissipating device of claim 1, wherein the base, the hub, the first and second sets of blades are integrally formed as a single unit. ### Claim 8 (depends on 1) The heat-dissipating device of claim 1, wherein the hub and the first set of blades are integrally formed as a first unit, and the base and the second set of blades are integrally formed as a second unit to be assembled with the first unit. ### Claim 9 (depends on 1) The heat-dissipating device of claim 1, wherein the housing further comprises: a first frame for accommodating the rotor therein; and a second frame coupled to the first frame, provided with the opening and having the sidewall extending from a periphery of the opening inwardly to define the air-gathering chamber in the housing. ### Claim 10 (depends on 9) The heat-dissipating device of claim 9, wherein the second frame further comprises a plurality of air-guiding members disposed along the sidewall for increasing a blast pressure of airflow passing through the heat-dissipating device. ### Claim 11 (depends on 10) The heat-dissipating device of claim 10, wherein the plurality of air-guiding members are shaped as strip, plate, curved, inclined or airfoil structures. ### Claim 12 (depends on 10) The heat-dissipating device of claim 10, wherein The second frame further comprises a support mounted inside the opening and the plurality of air-guiding members are arranged between the sidewall and the support. ### Claim 13 (depends on 12) The heat-dissipating device of claim 12, wherein the first frame has a bearing tube for allowing a first bearing to be disposed therein and the support of the second frame receives a second bearing so as to jointly support a shaft of the rotor with the first bearing. ### Claim 14 (depends on 10) The heat-dissipating device of claim 10, further comprising an another set of air-guiding members disposed on an air outlet of the housing. ### Claim 15 (depends on 9) The heat-dissipating device of claim 9, wherein the sidewall has a flange radially extending from one end thereof to define an entrance of the air-gathering chamber, and each of the blades has an end extending toward the entrance of the air-gathering chamber for guiding the airflow into the air-gathering chamber. ### Claim 16 (depends on 9) The heat-dissipating device of claim 9, wherein the air-gathering chamber partially or completely overlaps an air passage through the rotor in height along an axis of the heat-dissipating device. ### Claim 17 (depends on 9) The heat-dissipating device of claim 9, wherein the second frame has an extending part formed on an inner surface thereof and extending toward a direction of the first frame to form an axially compressed airflow passage in the housing. ### Claim 18 (depends on 9) The heat-dissipating device of claim 9, wherein a cross-sectional area of the air-gathering chamber is substantially equal in size to that of an air outlet of the housing. ### Claim 19 A heat-dissipating device, comprising: a housing having an air inlet and an air outlet; a rotor disposed in the housing, and having a first set of blades and a second set of blades, both of which are disposed on a base of the rotor and have upper edges facing to the air inlet and positioned at different heights; wherein the housing includes: a first frame for accommodating the rotor therein; and a second frame coupled to the first frame, having a sidewall and a flange radially extending from the bottom of the sidewall toward the direction of the first frame to define an entrance of an air-gathering chamber, the entrance is between the flange and the bottom of the housing, and the air-gathering chamber is between the sidewall and a peripheral wall of the housing, and wherein an outermost end of the flange is vertically aligned with an outermost end of at least one of the first set of blades and the second set of blades. ### Claim 20 (depends on 19) The heat-dissipating device of claim 19, wherein the rotor further comprises a hub for connecting the first set of blades thereon and a base for mounting the second set of blades thereon. ### Claim 21 (depends on 20) The heat-dissipating device of claim 20, wherein the first set of blades extends from a periphery of the hub to a surface of the base, and the first and second sets of blades are alternately arranged. ### Claim 22 (depends on 20) The heat-dissipating device of claim 20, wherein the first and second sets of blades are correspondingly connected with each other and bent to different directions.