CENTRIFUGAL BLOWER WITH ASYMMETRIC BLADE SPACING
First Claim
Patent Images
1. A centrifugal blower, comprising:
- a motor having a number of pole passes, wherein the number of pole passes is an even number; and
sixty one impeller blades, wherein each of the sixty one impeller blades is associated with a nominal blade angle having a nominal blade angle value, the nominal blade angle being an angular displacement between adjacent impeller blades, wherein the number of impeller blades are each spaced asymmetrically about a central hub such that each impeller blade position about the central hub such that a summation of the nominal blade angle values is equal to 360° and
an operating characteristic value of the centrifugal blower is deemed to be within a pre-determined range of operating characteristic values, wherein a first nominal blade angle value is 5.33°
, a second nominal blade angle value is 5.35°
;
a third nominal blade angle value is 5.48°
;
a fourth nominal blade angle value is 5.23°
;
a fifth nominal blade angle value is 5.97°
;
a sixth nominal blade angle value is 5.54°
;
a seventh nominal blade angle value is 5.33°
;
an eighth nominal blade angle value is 5.52°
;
a ninth nominal blade angle value is 5.90°
;
a tenth nominal blade angle value is 6.05°
;
an eleventh nominal blade angle value is 6.05°
;
a twelfth nominal blade angle value is 6.15°
;
a thirteenth nominal blade angle value is 5.55°
;
a fourteenth nominal blade angle value is 5.53°
;
a fifteenth nominal blade angle value is 5.93°
;
a sixteenth nominal blade angle value is 6.08°
;
a seventeenth nominal blade angle value is 6.27°
;
an eighteenth nominal blade angle value is 6.53°
;
a nineteenth nominal blade angle value is 6.45°
;
a twentieth nominal blade angle value is 6.60°
;
a twenty-first nominal blade angle value is 6.55°
;
a twenty-second nominal blade angle value is 6.59°
;
a twenty-third nominal blade angle value is 5.53°
;
a twenty-fourth nominal blade angle value is 6.28°
;
a twenty-fifth nominal blade angle value is 5.58°
;
a twenty-sixth nominal blade angle value is 5.75°
;
a twenty-seventh nominal blade angle value is 5.48°
;
a twenty-eighth nominal blade angle value is 5.45°
;
a twenty-ninth nominal blade angle value is 5.84°
;
a thirtieth nominal blade angle value is 5.25°
; and
a thirty-first nominal blade angle value is 5.23°
, a thirty-second nominal blade angle value is 5.65°
, a thirty-third nominal blade angle value is 5.27°
, a thirty-fourth nominal blade angle value is 5.96°
, a thirty-fifth nominal blade angle value is 5.93°
, a thirty-sixth nominal blade angle value is 5.35°
, a thirty seventh nominal blade angle value is 6.57°
;
a thirty eighth nominal blade angle value is 6.48°
;
a thirty ninth nominal blade angle value is 6.25°
;
a fortieth nominal blade angle value is 6.27°
;
a forty first nominal blade angle value is 6.32°
;
a forty second nominal blade angle value is 6.02°
;
a forty third nominal blade angle value is 5.87°
;
a forty fourth nominal blade angle value is 6.04°
;
a forty fifth nominal blade angle value is 5.21°
;
an forty sixth nominal blade angle value is 5.20°
;
a forty seventh nominal blade angle value is 5.43°
;
a forty eighth nominal blade angle value is 5.77°
;
a forty ninth nominal blade angle value is 6.27°
;
a fiftieth nominal blade angle value is 5.72°
;
a fifty first nominal blade angle value is 5.84°
;
a fifty second nominal blade angle value is 6.47°
;
an fifty third nominal blade angle value is 6.35°
;
a fifty fourth nominal blade angle value is 6.32°
;
a fifty fifth nominal blade angle value is 6.46°
;
a fifty sixth nominal blade angle value is 6.58°
;
a fifty seventh nominal blade angle value is 6.37°
;
a fifty eighth nominal blade angle value is 5.54°
;
a fifty ninth nominal blade angle value is 5.87°
;
a sixtieth nominal blade angle value is 5.78°
, and a sixty first nominal blade angle value is 6.26°
.
1 Assignment
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Accused Products
Abstract
A centrifugal blower in a cooling system of an electronic device having asymmetrical blade spacing with acceptable balance. The asymmetrical blade spacing is determined according to a set of desired acoustic artifacts that are favorable and balance that is similar to that found with equal fan blade spacing. In one embodiment, the fan impeller can include sixty one fan blades.
10 Citations
2 Claims
-
1. A centrifugal blower, comprising:
-
a motor having a number of pole passes, wherein the number of pole passes is an even number; and sixty one impeller blades, wherein each of the sixty one impeller blades is associated with a nominal blade angle having a nominal blade angle value, the nominal blade angle being an angular displacement between adjacent impeller blades, wherein the number of impeller blades are each spaced asymmetrically about a central hub such that each impeller blade position about the central hub such that a summation of the nominal blade angle values is equal to 360° and
an operating characteristic value of the centrifugal blower is deemed to be within a pre-determined range of operating characteristic values, wherein a first nominal blade angle value is 5.33°
, a second nominal blade angle value is 5.35°
;
a third nominal blade angle value is 5.48°
;
a fourth nominal blade angle value is 5.23°
;
a fifth nominal blade angle value is 5.97°
;
a sixth nominal blade angle value is 5.54°
;
a seventh nominal blade angle value is 5.33°
;
an eighth nominal blade angle value is 5.52°
;
a ninth nominal blade angle value is 5.90°
;
a tenth nominal blade angle value is 6.05°
;
an eleventh nominal blade angle value is 6.05°
;
a twelfth nominal blade angle value is 6.15°
;
a thirteenth nominal blade angle value is 5.55°
;
a fourteenth nominal blade angle value is 5.53°
;
a fifteenth nominal blade angle value is 5.93°
;
a sixteenth nominal blade angle value is 6.08°
;
a seventeenth nominal blade angle value is 6.27°
;
an eighteenth nominal blade angle value is 6.53°
;
a nineteenth nominal blade angle value is 6.45°
;
a twentieth nominal blade angle value is 6.60°
;
a twenty-first nominal blade angle value is 6.55°
;
a twenty-second nominal blade angle value is 6.59°
;
a twenty-third nominal blade angle value is 5.53°
;
a twenty-fourth nominal blade angle value is 6.28°
;
a twenty-fifth nominal blade angle value is 5.58°
;
a twenty-sixth nominal blade angle value is 5.75°
;
a twenty-seventh nominal blade angle value is 5.48°
;
a twenty-eighth nominal blade angle value is 5.45°
;
a twenty-ninth nominal blade angle value is 5.84°
;
a thirtieth nominal blade angle value is 5.25°
; and
a thirty-first nominal blade angle value is 5.23°
, a thirty-second nominal blade angle value is 5.65°
, a thirty-third nominal blade angle value is 5.27°
, a thirty-fourth nominal blade angle value is 5.96°
, a thirty-fifth nominal blade angle value is 5.93°
, a thirty-sixth nominal blade angle value is 5.35°
, a thirty seventh nominal blade angle value is 6.57°
;
a thirty eighth nominal blade angle value is 6.48°
;
a thirty ninth nominal blade angle value is 6.25°
;
a fortieth nominal blade angle value is 6.27°
;
a forty first nominal blade angle value is 6.32°
;
a forty second nominal blade angle value is 6.02°
;
a forty third nominal blade angle value is 5.87°
;
a forty fourth nominal blade angle value is 6.04°
;
a forty fifth nominal blade angle value is 5.21°
;
an forty sixth nominal blade angle value is 5.20°
;
a forty seventh nominal blade angle value is 5.43°
;
a forty eighth nominal blade angle value is 5.77°
;
a forty ninth nominal blade angle value is 6.27°
;
a fiftieth nominal blade angle value is 5.72°
;
a fifty first nominal blade angle value is 5.84°
;
a fifty second nominal blade angle value is 6.47°
;
an fifty third nominal blade angle value is 6.35°
;
a fifty fourth nominal blade angle value is 6.32°
;
a fifty fifth nominal blade angle value is 6.46°
;
a fifty sixth nominal blade angle value is 6.58°
;
a fifty seventh nominal blade angle value is 6.37°
;
a fifty eighth nominal blade angle value is 5.54°
;
a fifty ninth nominal blade angle value is 5.87°
;
a sixtieth nominal blade angle value is 5.78°
, and a sixty first nominal blade angle value is 6.26°
. - View Dependent Claims (2)
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Specification
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Current AssigneeApple Inc.
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Original AssigneeApple Inc.
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InventorsDybenko, Jesse T., DUKE, Connor R.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current417/423.7
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CPC Class CodesF04D 29/281 for fans or blowersF04D 29/666 by means of rotor construct...
