TW200539791A - Dissipation module with noise reduction function - Google Patents

Dissipation module with noise reduction function Download PDF

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Publication number
TW200539791A
TW200539791A TW093115561A TW93115561A TW200539791A TW 200539791 A TW200539791 A TW 200539791A TW 093115561 A TW093115561 A TW 093115561A TW 93115561 A TW93115561 A TW 93115561A TW 200539791 A TW200539791 A TW 200539791A
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TW
Taiwan
Prior art keywords
centrifugal fan
heat dissipation
patent application
scope
air outlet
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Application number
TW093115561A
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Chinese (zh)
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TWI264267B (en
Inventor
Ping-Sheng Kao
Yu-Nien Huang
Tsan-Nan Chien
Dennis Liu
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Quanta Comp Inc
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Priority to TW093115561A priority Critical patent/TWI264267B/en
Priority to US11/034,859 priority patent/US20050263268A1/en
Publication of TW200539791A publication Critical patent/TW200539791A/en
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Publication of TWI264267B publication Critical patent/TWI264267B/en

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • H05K7/20172Fan mounting or fan specifications
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/0002Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/30Technical effects
    • H01L2924/301Electrical effects
    • H01L2924/3011Impedance

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A dissipation device includes a dissipation fin set and a centrifugal fan. The centrifugal fan outputs airflow toward the dissipation fin set to remove the heat from it. The centrifugal fan includes a centrifugal impeller mounted on a motor. An outer housing houses the motor and the centrifugal impeller therein. An inner wall of the housing's outlet has feathered structure to reduce noises. The dissipation fin set includes a fin structure adjacent to a heat source, as well as an airflow channel housing. The airflow channel includes featured structures for reducing noises.

Description

200539791 五、發明說明(1) '^^^ ~ 【發明所屬之技術領域】 本發明是有關於一種散熱模組’且特別是有關於一種用於 電腦之具消音功能之散熱模組。 【先前技術】 隨著電腦因應薄型化的市場需求,筆記型電腦機殼内部已 無法預留出足夠的自然對流空間,供散熱設計所需的結 構。尤其在高頻元件(例如中央處理器和繪圖晶片),已經 面臨相當散熱設計執行上的瓶頸。因此,利用離心式風扇200539791 V. Description of the invention (1) '^^^ ~ [Technical field to which the invention belongs] The present invention relates to a heat dissipation module', and in particular to a heat dissipation module with a noise reduction function for a computer. [Previous Technology] As the computer responds to the thinning market demand, sufficient natural convection space cannot be reserved inside the notebook computer case for the structure required for heat dissipation design. Especially in high-frequency components (such as central processing units and graphics chips), they have faced bottlenecks in the implementation of considerable thermal design. Therefore, using a centrifugal fan

產生強制對流散熱方法已經是現在筆記型電腦散熱機制之 主要架構。 =心式風扇100乃是利用堝形外殼曲面漸擴的流道設計(士 第1圖所示),離心式扇葉103將氣體動能轉為壓力能,用 以付到較佳的靜壓以克服筆記型電腦系統内之高流阻。》 面,離心式扇葉103所驅動之空氣經蝸形流道 知成的尾流(Wake flow),以及空氣在法 構件摩擦造成的渦流(vortex),會產生外殼等機 音。此噪音波隨著離心式風扇所產生咼頻的窄頻^ 時,亦會因流體與流道管壁的麾 、札机’經散熱模衾 頻譜。 厚擦’而產生更高頻的噪The generation of forced convection cooling methods is already the main structure of the cooling mechanism of notebook computers. = The heart-shaped fan 100 is designed with a gradually expanding flow channel on the curved surface of the pot-shaped shell (shown in Figure 1). The centrifugal fan blade 103 converts the kinetic energy of the gas into pressure energy to pay for a better static pressure. Overcome high flow resistance in notebook computer systems. The surface of the air driven by the centrifugal fan blade 103 through the snail-shaped flow channel (Wake flow), and the vortex caused by the friction between the air and the French components, will produce machine sounds such as the shell. When this noise wave is generated with the narrow frequency of the high frequency generated by the centrifugal fan, it will also be caused by the 麾 of the fluid and the pipe wall of the flow channel, and the ’'through the cooling mode. Thick wipe ’to produce higher frequency noise

一旦需提升散熱效能,勢必要擗 窃 流場增加的將使風扇所產生】法^ S (風速)。然而, 噪音與散熱議題上難以取拾的^擾動更劇烈,因而造成 境成了筆記型電腦製造商面臨:=戰如何解決此一兩難困Once it is necessary to improve the cooling efficiency, it is necessary to steal the increase of the flow field, which will cause the fan to generate ^ S (wind speed). However, the intractable disturbances on the issue of noise and heat dissipation are even more severe, which has caused the environment to become a problem for notebook computer manufacturers: how to solve this dilemma?

200539791 五、發明說明(2) 【發明内容】 因此本發明的目的就是在提供一種具消音功能之散熱模 組,用以減低氣流過大所造成的噪音。 、吴 根據本發明之上述目的,提出一種具有消音功能之 組。此散熱模組包含一散熱韓片模組及一離心式風 :二輸出的氣★’送往散熱錯片模組,用以移 上之熱量。離心式風戶呀、黯片 I屬包含離心式扇葉,固定於一 _这 轉子上。風扇外殼固定 &甘h 馬達之 風口邱之內辟且古主馬達離心式扇葉於其内。外殼出 的亞立 /、有毛狀結構,用以消除離心式風屬所產生 片 二及ΐ ί '且包含-緊鄰於散熱標的物之散熱鰭 其中。流道UlL5i殼,®定散熱鰭片及散熱襟的物於 .,^4音功能之毛狀結構。 -诘f用本發明具有消音功能的散熱模組,除了 月匕减低噪音之振幅外 技降j 度降低。換言之,蚀亦能使衝擊後之尾流分佈不均的程 — 、 使流場穩定,得到較寬頻分佈. IHay - stack)的峰立 么 系9 ,讓使用者感覺到較佳的聲音品質。 【實施方式】 為了解決噪 音功能的散 壁,設計一 的功能。上 音與散熱兩 熱模組。本^ 種細小的毛 述的毛狀結 難的議題, 發明藉由在 狀結構,使 構亦可應用 一種具有消 的出風口内 类員似消音器 熱模組流道200539791 V. Description of the invention (2) [Summary of the invention] Therefore, the object of the present invention is to provide a heat dissipation module with a noise reduction function to reduce noise caused by excessive airflow. Wu According to the above-mentioned object of the present invention, a group having a muffler function is proposed. This cooling module includes a cooling Korean chip module and a centrifugal wind: two output air ★ ’are sent to the cooling wrong chip module for transferring the heat. Centrifugal fan, eclipse I belongs to a centrifugal fan blade, which is fixed on a rotor. The fan housing is fixed & Ganh Motor's air outlet Qiu Zhipi is inside and the ancient main motor centrifugal fan blade is inside. The outer / hairy structure of the outer shell is used to eliminate the fins and ΐ 'generated by the centrifugal wind genus and including-the heat radiating fins adjacent to the heat sink. The flow path UlL5i shell, ® sets the heat sink fins and heat sinks to a hair-like structure with a 4-, 4-tone function. -诘 f Uses the heat dissipation module with noise reduction function of the present invention, in addition to reducing the amplitude of the noise by the moon dagger, the j degree is reduced. In other words, eclipse can also make the wake distribution uneven after the impact—stabilize the flow field and get a wider frequency distribution. IHay-stack's peak standing system 9 allows users to feel better sound quality. [Embodiment] In order to solve the scattered wall of the noise function, the first function is designed. There are two thermal modules for sound and cooling. The problem of the hairy knot described in this kind of fine hair is difficult. The invention invented the structure to make it possible to apply a class-like muffler inside the air outlet.

本發明提出 離心式風屬 出風D產生 在其他的散The invention proposes that the centrifugal wind belongs to the wind D generated in other scattered

第8頁 200539791 五、發明說明(3) 内,例如散熱鰭片的散熱模組,藉以減少噪音。 請參照第2圖’其繪示依照本發明一較佳實施例的一種具 有消音功能之離心式風扇示意圖。離心式風扇2 〇 〇具有一 離心式扇葉2 0 3。離心式風扇2 0 0中的馬達(未緣出)驅動離 心式扇葉2 0 3,使空氣由入風口 2 0 2進氣,經風扇内的蝸形 流道2 0 1,最後由出風口 2 0 4出氣。因流體在蝸形流道2 0 1 内和管壁20 5產生摩擦,氣流20 6内含了許多特定高頻的窄 頻噪音。為了消除上述高頻的窄頻噪音,本較佳實施例在 出風口 2 0 4流道的内壁2 0 7,設計毛狀的結構2 2 2 a。此毛狀 始構使整個流道產生類似消音器之幾何結構,不但能使靠 近流道内壁2 0 7的流體流速較平順,而消減流體撞擊流道 内壁2 0 7所產生的結構幅射音。而且,毛狀結構2 2 2 a能對 .音波產生吸收或干涉等效用。此毛狀結構需維持小尺寸 設^ ’以避免增加過大的流阻為原則。毛狀結構可以藉由 雜著的方式固定在流道内壁。 明參照第3圖,其繪示依照本發明另一較佳實施例的一種 具有消音功能之散熱模組示意圖。以及參照第3A圖,其繪 示依照本發明第3圖之散熱流道剖面圖。上述的毛狀結構 &除了可以設計在離心式風扇的出風口端2 〇 4外,亦可 設計在散熱模組流道211内。本實施例包含一離心式風# 2 ^ ~散熱鰭片模組2 1 〇。參照3 A圖,散熱鰭片模級^ ^ :固定緊鄰於一發熱元件220 (散熱標的物),使得發埶 $ 220產生的熱傳導奚散熱鰭片。散熱鰭片模組2 1 〇係由 "2 1 2和散熱流道外殼2 1 6所纟且成。散熱流道外殼2 1 6兩Page 8 200539791 5. In the description of the invention (3), for example, the heat dissipation module of the heat dissipation fins can reduce the noise. Please refer to FIG. 2 ', which illustrates a schematic view of a centrifugal fan with a noise reduction function according to a preferred embodiment of the present invention. The centrifugal fan 2000 has a centrifugal fan blade 203. The motor (not edged out) in the centrifugal fan 200 drives the centrifugal fan blade 203, so that air is drawn in through the air inlet 2 02, passes through the worm-shaped flow channel 2 0 1 in the fan, and finally by the air outlet 2 0 4 out of gas. Due to the friction between the fluid in the volute channel 20 and the tube wall 20 5, the air flow 20 6 contains many narrow-frequency noises of a specific high frequency. In order to eliminate the above-mentioned narrow-frequency noise at a high frequency, in the preferred embodiment, a hair-like structure 2 2 2 a is designed on the inner wall 2 0 7 of the flow passage 204 of the air outlet. This hair-like starting structure produces a muffler-like geometric structure throughout the flow channel, which not only makes the flow velocity of the fluid near the inner wall of the flow channel 2 0 7 smoother, but also reduces the structural radiation generated by the fluid hitting the inner wall 2 7 of the flow channel. . Moreover, the hair-like structure 2 2 2 a can absorb or interfere with sound waves equivalently. This hair-like structure needs to maintain a small size, and it is a principle to avoid increasing excessive flow resistance. The hair-like structure can be fixed on the inner wall of the flow channel in a mixed manner. Referring to FIG. 3, a schematic diagram of a heat dissipation module with a noise reduction function according to another preferred embodiment of the present invention is shown. And referring to FIG. 3A, it shows a cross-sectional view of a heat dissipation channel according to FIG. 3 of the present invention. The above-mentioned hairy structure & can be designed not only in the outlet end of the centrifugal fan 204, but also in the cooling module flow channel 211. This embodiment includes a centrifugal wind # 2 ^ ~ cooling fin module 21. Referring to FIG. 3A, the heat dissipation fin module stage ^ ^: fixed next to a heating element 220 (a heat sink object), so that the heat conduction generated by the hairpin $ 220 heat dissipation fin. The radiating fin module 2 10 is formed by " 2 1 2 and the radiating channel housing 2 1 6. Cooling runner housing 2 1 6 two

200539791 五、發明說明(4) ^ 側具有固定翼片217,且翼片包含固定孔219,可使用螺 鎖固。散熱鰭片模組21 0具有入風口 2〇8,接收來自離心^ 風扇2 0 0之氣流2 0 6。氣流2 0 6流經散熱鰭片2 1 2,將散熱鰭 片2 1 2上的熱量帶走,由出風口 2 1 8吹出。 、 本較佳實施例係於離心式風扇2 〇 〇之出風口 2 0 4内壁2 0 7及 散熱鰭片模組2 1 0之流道2 11内,設計毛狀結構 2 2 2 a / 2 2 2 b。此毛狀結構使整個流道產生類似消音器之幾 何結構,不但能使靠近流道内壁的流體流速較平順,而消 減流體撞擊流道内壁所產生的結構幅射音。而且,毛狀妹 構能對噪音波產生吸收或干涉等效用。此毛狀結構需維持 小尺寸設計,以避免增加過大的流阻為原則。毛狀結構可 ⑩ 以藉由枯著的方式固定在流道内壁。此毛狀的結構對於高 頻之喿曰降低效果大’其最大衰減量跟流道截面積有關〕 般流道設計時,其流道截面直徑D / d範圍是噪音波長的 〇 . 5 -1 · 〇倍。 此外,毛狀結構並不需要規則的毛狀結構排列或等間距的 毛狀結構。毛狀結構之毛長度、密度及柔軟度對消音的效 果均有影響。 由上述本發明較佳實施例可知,應用本發明具有消音功能 的散熱模組,除了能減低噪音之振幅外,亦能使衝擊後之❶ 尾流分佈不均的程度降低。換言之,使流場穩定,得到較 寬頻分佈(Hay-stack)的噪音,讓使用者感覺到較佳的聲 音品質。 雖然本發明已以一較佳實施例揭露如上,然其並非用以限200539791 V. Description of the invention (4) ^ There are fixing fins 217 on the side, and the fins include fixing holes 219, which can be fixed by screws. The cooling fin module 21 0 has an air inlet 208 for receiving an air current 206 from a centrifugal fan 200. The air current 2 0 6 flows through the heat dissipation fins 2 1 2 and takes away the heat on the heat dissipation fins 2 1 2 and blows them out through the air outlet 2 1 8. The preferred embodiment is designed in the air outlet 2 0 4 of the centrifugal fan 2000, the inner wall 2 0 7 and the flow channel 2 11 of the heat dissipation fin module 2 1 0, and a hair-like structure 2 2 2 a / 2 is designed. 2 2 b. This hair-like structure makes the entire flow channel a geometric structure similar to a muffler, which not only makes the flow velocity of the fluid close to the inner wall of the flow channel smoother, but also reduces the structural radiation generated by the fluid hitting the inner wall of the flow channel. In addition, the hairy structure can effectively absorb or interfere with noise waves. This wool-like structure needs to maintain a small size design to avoid increasing excessive flow resistance as a principle. The hair-like structure can be fixed to the inner wall of the flow channel in a dry manner. This hairy structure has a large reduction effect for high frequencies. Its maximum attenuation is related to the cross-sectional area of the flow channel.] When the flow channel is designed, the cross-sectional diameter D / d of the flow channel ranges from 0.5 to -1. 〇 times. In addition, hairy structures do not require regular hairy structure arrangements or equally spaced hairy structures. The hair length, density, and softness of the hairy structure all have an effect on the effectiveness of sound attenuation. It can be known from the above-mentioned preferred embodiments of the present invention that, in addition to reducing the amplitude of noise, the heat-dissipating module having a sound-absorbing function of the present invention can also reduce the degree of uneven distribution of the wake after impact. In other words, the flow field is stabilized, and a wider-band noise (Hay-stack) is obtained, so that the user feels better sound quality. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to be limited thereto.

第10頁 200539791 五、發明說明(5) 定本發明,任何熟習此技藝者,在不脫離本發明之精神和 範圍内,當可作各種之更動與潤飾,因此本發明之保護範 圍當視後附之申請專利範圍所界定者為準。Page 10 200539791 V. Description of the invention (5) Anyone skilled in the art can make various modifications and retouching without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be attached as follows The scope of the patent application shall prevail.

第11頁 200539791 圖式簡單說明 【圖式簡單說明】 為讓本發明之上、+、 懂,下文转與建和其他目的、特徵、和優點能更明顯易 明如下:牛一較佳實施例,並配合所附圖式,作詳細說 第1圖係繪示一藉羽 _ m 第2圖裤泠-分種弧知的離式風扇示意圖; 妒之錐、、^々不ΓΤ、照本發明一較佳實施例的一種具有消音功 此之離心式風扇示意圖; 第3圖係繪示依照本發明另一較佳實施例的一種具有消音 功能之散熱模組示意圖;以及 第3A圖係繪示依照本發明另一較佳實施例的一種具有消音 功能之散熱流道剖面圖。 單說明】 【元件代表符號簡 1 0 0 ·•離心式風扇 103·離心示扇葉 1 0 6 :氣流 20 2 :入風口 2 0 4 :出風口 2 0 8 :入風口 2 1 2 :散熱鰭片 117:固定翼片 2 1 9 :固定孔 2 2 0 :發熱元件 D/d:流道截面直徑 1 0 2 :入風口 1 04 :出風口 2 0 0 :離心式風扇 2 0 3 :離心示扇葉 2 0 6 :氣流 2 1 0 :散熱鰭片模組 2 1 6 :散熱流道外殼 2 1 8 :出風口 222a/222b :毛狀結構Page 11 200539791 Brief description of the drawings [Simplified illustration of the drawings] In order to make the present invention more obvious, +, and other purposes, features, and advantages can be more clearly understood as follows: Niuyi Preferred Embodiment In conjunction with the attached drawings, the detailed description is shown in Figure 1. Figure 1 shows a borrowed feather _ m Figure 2. Pant Ling-a separate arc fan schematic diagram; jealous cone, ^ 々 不 ΓΤ, photocopy A schematic diagram of a centrifugal fan with a noise reduction function according to a preferred embodiment of the invention; FIG. 3 is a schematic diagram of a heat dissipation module with a noise reduction function according to another preferred embodiment of the present invention; A cross-sectional view of a heat-dissipating flow channel with a sound-absorbing function according to another preferred embodiment of the present invention. [Single description] [Representative symbols for components 1 0 0 · • Centrifugal fan 103 · Centrifugal fan blade 1 0 6: Airflow 20 2: Air inlet 2 0 4: Air outlet 2 0 8: Air inlet 2 1 2: Heat fin Sheet 117: Fixed fin 2 1 9: Fixing hole 2 2 0: Heating element D / d: Cross section diameter of flow channel 1 0 2: Air inlet 1 04: Air outlet 2 0 0: Centrifugal fan 2 0 3: Centrifugal display Fan blade 2 0 6: Airflow 2 1 0: Radiating fin module 2 1 6: Radiating runner housing 2 1 8: Air outlet 222a / 222b: Hairy structure

第12頁Page 12

Claims (1)

200539791 六、申請專利範圍 1. 一種具有消音功能之離心式風扇,至少包含: 一離心式扇葉;以及 一外殼,包覆該離心式扇葉於其内,該外殼至少包含: 一入風口,位於該離心式扇葉的轴向; 一出風口,位於該離心式扇葉的徑向;以及 一毛狀結構,位於該外殼出風口部之内壁,用以消除離心 式風扇所產生的嗓音。 2. 如申請專利範圍第1項所述之離心式風扇,其中該出風 口之流道截面直徑範圍是噪音波長的0 . 5 - 1. 0倍。 3. 如申請專利範圍第1項所述之離心式風扇,其中該毛狀 結構係以尼龍或人造絲製成。 4. 如申請專利範圍第1項所述之離心式風扇,其中該毛狀 結構係藉由粘著方式固定在該外殼出風口部之内壁。 5. 如申請專利範圍第1項所述之離心式風扇,其中該毛狀 結構之毛長度、密度或柔軟度是影響消音因素。 6. —種具有消音功能之散熱模組,至少包含: 一散熱鰭片,固定緊鄰於一散熱標的物; 一散熱流道外殼,固定該散熱鰭片及該散熱標的物於其 中,其中該散熱流道外殼包含一第一入風口、一第一出風 口及流道内壁具消音功能之毛狀結構;以及200539791 VI. Scope of patent application 1. A centrifugal fan with noise reduction function, at least comprising: a centrifugal fan blade; and a casing covering the centrifugal fan blade, the casing at least includes: an air inlet, It is located in the axial direction of the centrifugal fan blade; an air outlet is located in the radial direction of the centrifugal fan blade; and a hair-like structure is located on the inner wall of the air outlet portion of the casing to eliminate the noise generated by the centrifugal fan. 2. The centrifugal fan according to item 1 of the scope of patent application, wherein the cross-sectional diameter range of the flow channel of the air outlet is 0.5 to 1.0 times the noise wavelength. 3. The centrifugal fan according to item 1 of the patent application scope, wherein the wool-like structure is made of nylon or rayon. 4. The centrifugal fan according to item 1 of the scope of patent application, wherein the hair-like structure is fixed to the inner wall of the air outlet portion of the casing by an adhesive method. 5. The centrifugal fan according to item 1 of the scope of the patent application, wherein the hair length, density, or softness of the hair-like structure is a factor that affects noise reduction. 6. —A heat dissipation module with a noise reduction function, including at least: a heat dissipation fin fixedly adjacent to a heat dissipation target; a heat dissipation runner shell holding the heat dissipation fin and the heat dissipation target therein, wherein the heat dissipation The flow channel housing includes a first air inlet, a first air outlet, and a hair-like structure with a sound-absorbing function on the inner wall of the flow channel; and 第13頁 200539791 六、申請專利範圍 一風扇外殼,包圍一離心式扇葉於其内,設於該第一入風 口處,該外殼至少包含: 一第二入風口,位於該離心式扇葉的軸向; 一第二出風口 ,位於該離心式扇葉的徑向,其中該離心式 扇葉驅動的空氣經由該第二出風口流至該第一入風口;以 及 一毛狀結構,位於該外殼出風口部之内壁,用以消除離心 式風扇所產生的噪音。 7. 如申請專利範圍第6項所述之散熱模組,其中該第二出 風口之流道截面直徑範圍是σ喿音波長的0.5-1. 0倍。 8. 如申請專利範圍第6項所述之散熱模組,其中該散熱流 道之截面直徑範圍是噪音波長的0.5-1. 0倍。 9. 如申請專利範圍第6項所述之散熱模組,其中該毛狀結 構係以尼龍或人造絲製成。 1 0.如申請專利範圍第6項所述之散熱模組,其中該毛狀 結構係藉由粘著方式固定在該外殼出風口部之内壁。 11.如申請專利範圍第6項所述之散熱模組,其中該毛狀 結構之毛長度、密度或柔軟度是影響消音因素。Page 13 200539791 6. The scope of patent application A fan casing surrounds a centrifugal fan blade and is located at the first air inlet. The casing includes at least: a second air inlet located at the centrifugal fan blade. Axially; a second air outlet located in the radial direction of the centrifugal fan blade, wherein the air driven by the centrifugal fan blade flows to the first air inlet through the second air outlet; and a hair-like structure located at the The inner wall of the air outlet of the shell is used to eliminate the noise generated by the centrifugal fan. 7. The heat dissipation module according to item 6 of the scope of patent application, wherein the cross-sectional diameter range of the flow path of the second air outlet is 0.5-1. 0 times the wavelength of σ 喿 sound. 8. The heat dissipation module according to item 6 of the scope of patent application, wherein the cross-sectional diameter range of the heat dissipation channel is 0.5-1. 0 times the noise wavelength. 9. The heat dissipation module according to item 6 of the scope of patent application, wherein the wool-like structure is made of nylon or rayon. 10. The heat dissipation module according to item 6 of the scope of patent application, wherein the hair-like structure is fixed to an inner wall of an air outlet portion of the casing by an adhesive method. 11. The heat dissipation module according to item 6 of the scope of patent application, wherein the hair length, density, or softness of the hair-like structure is a factor that affects the noise reduction. 第14頁Page 14
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US20100159816A1 (en) * 2008-12-23 2010-06-24 International Business Machines Corporation Converging segments cooling
US20160345468A1 (en) * 2013-04-26 2016-11-24 CoolChip Technologies, Inc. Kinetic heat sink with stationary fins
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US5418339A (en) * 1993-11-04 1995-05-23 Minnesota Mining And Manufacturing Company Pneumatic tool having noise reducing muffling structure
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US6113485A (en) * 1997-11-26 2000-09-05 Advanced Micro Devices, Inc. Duct processor cooling for personal computer
US6422655B1 (en) * 1999-11-12 2002-07-23 Continental General Tire, Inc. Tire inside noise absorber
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