KR101483339B1 - A structure of the fan in a fan filter unit - Google Patents

A structure of the fan in a fan filter unit Download PDF

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KR101483339B1
KR101483339B1 KR20120079552A KR20120079552A KR101483339B1 KR 101483339 B1 KR101483339 B1 KR 101483339B1 KR 20120079552 A KR20120079552 A KR 20120079552A KR 20120079552 A KR20120079552 A KR 20120079552A KR 101483339 B1 KR101483339 B1 KR 101483339B1
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fan
filter unit
foamed
mold
beads
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KR20120079552A
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Korean (ko)
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KR20130028853A (en
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케이이치 카미무라
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가부시끼가이샤가미무라고오교오
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Ventilation (AREA)

Abstract

[과제] 본 발명은, 극히 경량으로 하고 강도와 내약품성 등이 우수한 팬 필터 유닛용의 팬 구조를 신규로 제공하는 것이다.
[해결수단] 본 발명은 클린 룸 내에 클린 에어를 공급하는 팬 필터 유닛의 팬을 발포율을 10∼30%로 하는 발포 스티롤로 형성하고, 또 이 팬의 전표면을 무전해 니켈도금으로 피막하여 이루어진다. 신규의 팬 필터 유닛의 팬 또는 기존 팬의 교환용으로 넓게 이용할 수 있다.[PROBLEMS] To provide a fan structure for a fan filter unit which is extremely light in weight and excellent in strength and chemical resistance.
[MEANS FOR SOLVING THE PROBLEMS] In the present invention, a fan of a fan filter unit for supplying clean air into a clean room is formed of foamed styrene having a foaming ratio of 10 to 30%, and the entire surface of the fan is coated with electroless nickel plating . It can be widely used for replacing a fan of a new fan filter unit or an existing fan.

Description

팬 필터 유닛의 팬 구조{A structure of the fan in a fan filter unit}[0001] The present invention relates to a fan structure of a fan filter unit,

본 발명은 클린 룸 내에 클린 에어를 공급하는 팬 필터 유닛(FFU)의 팬 구조에 관한 것이다.The present invention relates to a fan structure of a fan filter unit (FFU) for supplying clean air into a clean room.

종래, 클린 룸 내에는, 일본 특허공개 2000-205621호 공보의 3페이지 4항의 23행 이하에 기재되어 있는 바와 같이 「클린 룸에서는 다양한 약품이 사용되기 때문에, 이들 약품에 침해될 가능성이 있는 수지제의 것보다, 금속(예를 들면, 알루미늄이나 스테인리스강 등) 부재로 형성되는 것이 바람직하다.」로 되어, 팬은 알루미늄, 스테인리스, 도금강판, 강판을 가공 후 도장한 것 등 0.5∼1.0㎜ 두께 정도의 금속판의 판금가공과 조립에 의해 형성되고 있다.Conventionally, as described in the third and fourth lines of the Japanese Patent Application Laid-Open No. 2000-205621, line 23, line 23 of the Japanese Patent Application Laid-Open No. 2000-205621, "a variety of chemicals are used in a clean room, (For example, aluminum or stainless steel). "The fan is made of aluminum, stainless steel, a plated steel sheet, or a steel plate after being processed by machining, or the like to have a thickness of 0.5 to 1.0 mm Of the thickness of the metal sheet.

일본 특허공개 2000-205621호 공보Japanese Patent Application Laid-Open No. 2000-205621

또한, 종래의 팬은 도 4 내지 5에 나타내는 바와 같이, 중앙을 오목부로 하는 평면에서 보아 원형(圓形)을 한 판(板) 형상의 주지지부재(A)와 이 주지지부재(A)와 동일한 외주 지름을 갖고 내주측(內周側)을 이 주(主)지지부재의 오목부와 동일방향으로 압축하여 구부린 환상(環狀)의 부(副)지지부재(B)와, 이 주ㆍ부지지부재(A)(B) 사이에 걸쳐 또 서로 등간격을 두고 경사(傾斜) 방사상(放射狀)으로 종방향으로 설치하는 5개의 날개부재(C)와, 모터축 접합용 보스(D)를 각별히 형성하고, 주/부지지부재(A)(B) 사이에 날개부재(C)를 위치맞춤하여, 날개부재(C)에 형성된 걸림편(爪片)(c)을 양 지지부재(A)(B)의 관통구멍을 통과시켜 외측으로 구부려 잠그고, 접합용 보스(D)를 주지지부재(A)의 오목부 중심에 맞춰 리벳(E) 잠금하여 접합조립하므로, 숙련을 요하는 다수의 제조공정을 필요로 하고, 또, 프레스 성형, 조립용의 몰드 비용이 예컨대 외형 390φ인 것에서 10,000,000엔∼20,000,000엔이라고 할 수 있는 고액이 되기 때문에 팬의 제조비용이 높은 것으로 되어 있다는 과제가 있다.4 to 5, the conventional fan has a main support member A in the form of a plate having a circular shape as seen from a plane having a concave central portion, An auxiliary support member B having an outer diameter equal to that of the main support member and bent on the inner circumferential side by compressing the same in the same direction as the recess of the main support member, Five wing members C arranged longitudinally in an inclined radial manner at equal intervals from each other between the supporting members A and B and a wing member C And the wing members C are positioned between the main and auxiliary support members A and B so that the retaining members c formed on the wing members C are engaged with the supporting members A) (B) so as to be bent and locked outward, and the joining bosses D are fitted and assembled by locking the rivets E in alignment with the center of the recesses of the main support member A. Thus, Of There is a problem that requires a manufacturing process, and further, since the press-forming, solid-liquid, which is the 10,000,000 en en ~20,000,000 in what is the cost of the mold assembly, for example for appearance 390φ are their high production cost of the fan.

또, 팬을 안정적으로 회전시켜 진동 발생을 방지하기 위해서는 팬의 중량(重量) 밸런스에 치우침이 없는 것이 중요한바, 상기와 같이 조립한 판금제 팬에서는 프레스나 용접시의 변형, 접합조립시의 어긋남 등에 의해 중량 밸런스에 편차가 발생하는 것이 보통이며, 이 언밸런스를 수정하기 위해서는 밸런싱머신으로 하나하나의 팬을 회전시켜 중량 편위(偏位) 위치와 양을 측정해서, 그 반대측에 카운터 밸런스 추를 고정 설치하여 언밸런스를 제거하는 밸런스 조정 공정을 필요로 하기 때문에, 이 수고도 비용 상승을 초래하는 요인의 하나로 되어 있다는 과제가 있다.In order to prevent the occurrence of vibration by stably rotating the fan, it is important that there is no bias in the balance of the weight of the fan. In the above-described assembled sheet metal fan, when the press or the welding is deformed, In order to correct this unbalance, the balancing machine rotates the fans one by one to measure the position and amount of deflection, and counter balance weight is fixed on the opposite side. There is a problem that this labor is also one of the factors that causes an increase in cost because a balance adjustment step of removing unbalance is required.

또, 금속제이고 무거운 팬을 조립한 팬 필터 유닛은 수송시에 팬의 자중(自重)으로 진동하고, 그 진동에 의해 각 부재에 변형이 발생해서 새로운 언밸런스 상태를 야기하여, 밸런스의 재조정을 필요로 하는 일이 있다는 과제가 있다.In addition, a fan filter unit in which a metal heavy fan is assembled is vibrated by the weight of the fan during transportation, and deformation occurs in each member due to the vibration, resulting in a new unbalance state, There is a problem that there is work.

팬의 자중으로 상승되는 충격으로, 모터 회전축을 지지하는 베어링을 손상시키는 일도 많고, 손상되면 운전시의 진동이 커지거나 모터로부터 이음(異音)이 발생하는 문제로 이어진다는 과제가 있다.There is a problem that the bearing supporting the motor rotary shaft is often damaged by an impact which is raised by the self weight of the fan, and if it is damaged, there arises a problem that the vibration during operation becomes large or a noise is generated from the motor.

또, 팬의 중량이 무거울수록 규정 회전수까지의 기동시간이 길어지므로, 단시간에 규정 회전수에 도달시키기 위해서는 통상(通常) 운전에서 필요로 하는 것보다 큰 토크를 갖는 대형 모터를 사용할 필요가 있다는 과제가 있다.The larger the weight of the fan, the longer the startup time to the specified number of revolutions. Therefore, in order to reach the predetermined number of revolutions in a short time, it is necessary to use a large motor having a larger torque than that required in normal (normal) operation There is a challenge.

또, 팬과 같은 회전체는 원심력이 커짐에 따라 진동이나 소음을 발생하기 쉬워진다는 문제가 있고, 이를 해소하는데에는 동적 밸런스 수정을 하거나, 경량화하는 것이 현실적인 대응수단인바, 팬의 안이한 경량화에는 새롭게 회전속도(파괴 회전수)의 과제가 발생하게 된다.In order to solve this problem, it is necessary to correct the dynamic balance or reduce the weight of the rotating body, which is an actual means of countermeasures. In order to reduce the weight of the fan, A problem of a new rotation speed (breakdown revolution speed) is generated.

또, 클린 룸의 천정(天井) 등에는 다수의 팬 필터 유닛을 설치하기 위해 될 수 있으면 경량화되는 것이 요망되고 있다.In addition, it is demanded to reduce the weight of the ceiling of a clean room and the like in order to install a plurality of fan filter units.

본 발명은, 클린 룸 내에 클린 에어를 공급하는 팬으로서, 폴리스티렌 세립상(細粒狀) 비즈를 10∼30%의 저발포율로 한정시킨 발포와, 그 각 발포 비즈를 일정 시간을 들인 사일로 내 숙성에 의해 내부 압력을 안정시킨 후, 헥사ㆍ브로모ㆍ시클로ㆍ도데칸(HBCDD)의 자기소화성(自己消火性)이 높은 난연 조제(助劑)를 이겨넣어서 첨가하여 팬 성형용 금형 내에 충전해서 성형하는 것에 의해 판금제에 가까운 판 두께와 난연성을 구비하고 또 사출 성형 플라스틱 제품과 동일하게 강도를 높게 하여 이루어지는 팬을 형성하도록 하여, 이러한 과제를 해결한 것이다.The present invention relates to a fan for supplying clean air into a clean room, which is characterized in that it comprises: foaming in which polystyrene fine-grain beads are limited to a low foaming ratio of 10 to 30%; and foaming in which each of the foam beads is placed in a silo After stabilizing the internal pressure by aging, a flame retardant auxiliary having a high self-extinguishing property of hexa-bromo-cyclo-dodecane (HBCDD) was added thereto and charged into the mold for fan molding The present invention solves this problem by forming a fan having a plate thickness and flame retardancy close to that of a sheet metal, and having the same strength as that of an injection-molded plastic product.

본 발명의 발포 스티롤로 성형하는 팬은, 판금 제품에 필요로 하는 프레스 몰드와 조립용 몰드의 비용에 견주어 금형비를 10분의 1 이하로 할 수 있으므로 초기 투자비용을 현저히 낮게 억제할 수 있고, 또 금속 판재와 비교하여 현격히 저렴한 발포 스티롤재를 사용함으로써, 팬의 제조비용을 비약적으로 저렴하게 할 수 있다는 효과를 생기게 한다.The fan of the present invention can reduce the initial investment cost to a considerably low level because the mold cost can be reduced to one tenth or less in comparison with the cost of the press mold and the assembling mold required for sheet metal products, The use of a significantly lower cost foamed styrofoam compared to a metal plate results in an effect of significantly reducing the manufacturing cost of the fan.

팬은 발포 스티롤의 발포 성형으로 일체 성형 또는 접합이 용이한 2 분할체 등으로 성형할 수 있으므로, 제조능률을 비약적으로 향상시킬 수 있다는 효과를 생기게 한다. 게다가 절대 중량이 대단히 작아지므로, 예를 들면 중량 밸런스에 편위가 있어도 회전에 악영향을 미칠 정도는 되지 않아, 즉, 질량 경감률과 같은 비율로 원심력이 억제되기 때문에 편중심(偏重心)에 의한 언밸런스가 생겨도 영향이 나타나지 않는 범위에 머물기 때문에, 팬의 밸런스 조정의 수고를 생략할 수 있다는 효과를 생기게 한다.The fan can be formed into a two-piece body or the like which can be integrally formed or easily joined by foam molding of foamed styrol, resulting in an effect that the manufacturing efficiency can be dramatically improved. In addition, since the absolute weight is extremely small, for example, even if there is a deviation in the weight balance, the degree of unevenness due to the unbalance due to the centrifugal force can not be adversely affected, So that the effect of the balance adjustment of the fan can be omitted.

팬이 경량화됨으로써 팬 필터 유닛의 수송시의 진동이 경감하여, 진동 변형에 의한 밸런스 붕괴의 발생을 방지할 수 있고, 또, 모터축을 지지하는 베어링의 손상을 회피할 수 있다는 효과를 생기게 한다.As the fan is lightened, vibration during transportation of the fan filter unit is reduced, and the occurrence of balance collapse due to vibration deformation can be prevented, and damage to the bearing supporting the motor shaft can be avoided.

팬을 경량화함에 따라 구동모터의 사이즈를 소형인 것으로 해도 단시간에 규정 회전수에 도달시킬 수 있으므로, 설비비 및 운전비를 경감할 수 있다는 효과를 생기게 한다.As the fan is lightened, even if the size of the drive motor is small, it is possible to reach the predetermined number of revolutions in a short period of time, thereby reducing the equipment cost and the operation cost.

팬은 흡음성능이 큰 발포 스티롤로 형성했으므로, 특별한 방진(防振)구조를 구비하지 않아도 바람 가르는 소리, 모터로부터의 진동을 경감할 수 있다는 효과를 생기게 한다. 또한, 팬을 무전해 니켈도금에 의해 피막했으므로, 발포 스티롤 제품의 약점인 내약품성, 내유성(耐油性), 내열성 및 강도가 현격히 향상하여, 발포 스티롤이 손상됨으로 인해 발생하는 발진을 방해함과 아울러, 발포 스티롤로부터 발생하는 가스의 비산을 방지할 수 있고, 종래의 판금제와 동등하게 장기간의 사용에 제공할 수 있다는 효과를 생기게 한다.Since the fan is formed of foamed styrol having a high sound absorption performance, it is possible to reduce the noise of wind and vibration from the motor without having a special vibration proof structure. Further, since the fan is coated by electroless nickel plating, the chemical resistance, oil resistance, heat resistance and strength, which are weak points of the foamed styrol product, are remarkably improved and the oscillation generated due to the damaged foamed styrol is prevented , It is possible to prevent the scattering of gas generated from the foamed styrol and to provide the effect that it can be provided for long-term use in the same manner as the conventional sheet metal product.

도 1은 팬의 성형 상태를 나타내는 종단 측면도.
도 2는 무전해 니켈도금을 행한 팬의 평면도.
도 3은 팬 필터 유닛에 조립한 상태를 나타내는 종단 측면도.
도 4는 종래 예의 판금제 팬의 조립 전 상태로 나타내는 종단 측면도.
도 5는 동, 조립 상태의 평면도.1 is a longitudinal side view showing a forming state of a fan.
Fig. 2 is a plan view of a fan with electroless nickel plating. Fig.
3 is a longitudinal side view showing a state in which the fan filter unit is assembled;
Fig. 4 is a longitudinal side view showing a state before assembled with a conventional sheet metal fan. Fig.
Fig. 5 is a plan view of the assembled state. Fig.

본 발명은, 팬 필터 유닛의 팬을 발포율 10∼30%로 하는 발포 스티롤재로 형성하여, 이 팬의 전표면을 무전해 니켈도금으로 피막하도록 한 것이다.In the present invention, the fan of the fan filter unit is formed of a foamed styrol material having a foaming ratio of 10 to 30%, and the entire surface of the fan is coated with electroless nickel plating.

발포 스티롤 성형에 의해 팬 제조의 몰드비와 재료비를 종래의 판금제에 견주어 현저하게 싼값으로 하고, 조립이 필요 없는 정밀한 일체 성형에 의해 밸런스 조정을 불필요하게 하며, 대폭적인 경량화에 의해 수송시의 진동을 억제하여 새로운 변형의 발생을 방지하고, 종래보다 소형의 모터에 의한 운전을 가능하게 하며, 게다가 연속 운전에도 충분한 강도와 판금제 팬과 동등한 내약품성, 내유성, 내열성이 얻어지도록 한 것이다.The mold ratio and the material ratio of the fan manufacturing are made significantly lower than those of the conventional sheet metal by the foamed styrol molding and the balance adjustment is unnecessary by the precise integral molding which does not require assembly, To thereby prevent the occurrence of new deformation, to enable operation by a smaller motor than the conventional one, and to provide sufficient strength for continuous operation, chemical resistance, oil resistance, and heat resistance equivalent to those of a sheet metal fan.

[실시예 1][Example 1]

도 1 내지 도 3은 일 실시예를 나타내는 것으로, 발포 스티롤의 재료인 폴리스티렌을 부탄ㆍ펜탄 등의 탄화수소 가스로 발포시켜 직경 1㎜ 정도의 세립상(細粒狀) 폴리스티렌＝폴리스티렌 비즈에 탄화수소 가스를 흡수시키고, 이것에 폴리스티렌의 내열(耐熱) 온도 80∼90℃를 초과하는 100℃ 이상의 고온 증기를 쐬어 수지를 연화(軟化)ㆍ융해(融解)시킴과 아울러 압력을 가하여 발포시키며, 발포된 비즈끼리를 융착시키는 비즈법 발포 스티롤(expanded polystyrene, EPS)로 금형(2) 내에서 팬(1)을 일체로 성형한다.1 to 3 illustrate an embodiment in which polystyrene as a material of foamed styrene is foamed with a hydrocarbon gas such as butane or pentane to form a fine particle polystyrene polystyrene beads having a diameter of about 1 mm, The resin is softened and melted by applying a high-temperature steam of 100 ° C or more, which is higher than the heat-resistant temperature of polystyrene of 80 to 90 ° C., and the resin is foamed by applying pressure. The beads are formed by integrally molding the fan 1 in the mold 2 with expanded polystyrene (EPS).

더 구체적으로는, 예비 발포로서 폴리스티렌 비즈를 발포기 내에 투입하고, 교반하면서 증기로 가열하여 폴리스티렌 비즈를 팽창시킨다. 이 공정에서 발포율이 10∼30%(용적률 1.1배∼1.3배)의 설정치가 되도록 컨트롤해 두고 나서 숙성용 사일로 안으로 옮겨 8∼24시간 정도 입자를 숙성시켜 입자 내의 압력을 안정시키고, 그 후 폴리스티렌 비즈를 팬 성형용 금형(2) 안에 충전하여, 증기에 의해 2차 발포시킴과 동시에 비즈간끼리를 융착시켜 팬(1)을 성형하는 것이다. 또한, 재료인 폴리스티렌에 미리 헥사ㆍ브로모ㆍ시클로ㆍ도데칸(HBCDD) 등의 자기소화성(自己消火性)이 높은 난연 조제(助劑)를 이겨넣어서 첨가하여 발포 스티롤의 난연성을 높이도록 하는 것도 있다.More specifically, as preliminary foaming, polystyrene beads are charged into a foaming machine and heated with steam while stirring to expand the polystyrene beads. In this process, the foaming ratio is controlled so as to become a set value of 10 to 30% (volume ratio 1.1 to 1.3 times), and then transferred into the aging silo, aging the particles for about 8 to 24 hours to stabilize the pressure in the particles, The beads are charged into a mold 2 for fan molding, secondary foaming is carried out by steam, and the beads are fused to each other to form the fan 1. In addition, the flame retardancy of the foamed styrene is improved by adding a high flame retardant auxiliary such as hexa-bromo-cyclo-dodecane (HBCDD) to polystyrene as a material in advance have.

금형(2)은 팬(1)을 구성하는 주지지부재(1a)와 부지지부재(1b)와 날개부재(1c) 및 모터축 접합용 보스(1d)를 일체로 성형하는 형태로 만들어져 있으므로, 탈형(脫型)시에 일절 접합조립작업을 필요로 하지 않는 일체 성형으로 완성된 팬(1)이 얻어지는 것이다.The mold 2 is formed in such a manner that the main supporting member 1a and the auxiliary supporting member 1b constituting the fan 1 and the wing member 1c and the motor shaft bonding boss 1d are integrally formed, It is possible to obtain the fan 1 which is completed by the integral molding which does not require any joint assembly operation at the time of demolding.

또한, 주지지부재(1a)와 모터축 접합용 보스(1d), 부지지부재(1b)와 날개부재(1c)를 각각 일체로 한 2 분할 등의 분할체로 성형하여, 이들을 접착 등의 수단을 이용해서 접합하도록 한 것도 있다. 어느 쪽이든 판금제에 견주어, 조립작업은 대단히 용이한 것이 되며, 프레스나 용접작업을 필요로 하지 않기 때문에 변형이 발생할 일은 없는 것이 된다.The main supporting member 1a and the motor shaft joining boss 1d, the auxiliary supporting member 1b and the wing member 1c are integrally formed into a unitary body such as a two-piece unit, There is also one that is used to join. In either case, the assembly operation is very easy compared to the sheet metal production, and since no press or welding operation is required, no deformation will occur.

폴리스티렌 비즈의 발포율을 10∼30%로 한정시킴으로써, 사출 성형된 플라스틱 제품처럼 강도를 매우 높게 할 수 있고, 게다가 치수안정성이 높아 성형 정밀도에서 우수한 팬(1)을 얻을 수 있다. 판금제에 가까운 두께로 팬(1), 특히 날개부재(1c)를 성형할 수 있기 때문에, 종래 몰드의 공력(空力)특성의 설계사상을 그대로 활용할 수 있는 팬(1)이 되는 것이다. 또한, 발포율을 10%보다 낮게 하면 폴리스티렌 비즈 사이의 융착력이 약해져 성형 정밀도가 낮아지고, 30%보다 높게 하면 가공 두께의 최저 한도가 올라가 두께가 증가함으로써 공기가 흐르는 측의 날개부재의 형상이 재현될 수 없게 될 우려가 있다. 또한, 저발포용이라는 것에서 내고압성(耐高壓性)을 필요로 하지 않는 금형(2)은 재질, 강도의 점에서 극히 낮은 가격으로 제조하는 것이 가능하다.By limiting the foaming ratio of the polystyrene beads to 10 to 30%, it is possible to obtain a fan 1 having an extremely high strength as an injection-molded plastic product, and a high dimensional stability, so that the foam 1 having excellent molding precision can be obtained. Since the fan 1, particularly the blade member 1c, can be formed with a thickness close to that of the sheet metal, the fan 1 can utilize the design concept of the aerodynamic characteristic of the conventional mold as it is. If the foaming ratio is lower than 10%, the fusion strength between the polystyrene beads is weakened and the forming precision is lowered. When the foaming ratio is higher than 30%, the minimum thickness of the working thickness is increased and the thickness is increased, There is a fear that it can not be reproduced. Further, since the mold 2 for low foaming is not required to have high pressure resistance, the mold 2 can be manufactured at an extremely low price in terms of material and strength.

또한, 발포 스티롤의 원료인 폴리스티렌의 비중은 1.05이기 때문에, 발포율 10∼30%로 성형하는 발포 스티롤제 팬(1)의 중량은 스테인리스(합금)제 팬과 비교하여 약 8분의 1∼10분의 1, 알루미늄(합금)제의 약 3분의 1∼3.5분의 1 정도로 현저히 경량화되는 것이다.Since the specific gravity of the polystyrene as the raw material of the foamed styrol is 1.05, the weight of the foamed styrol pan 1 molded at a foaming ratio of 10 to 30% is about one-eighth to one-tenth 1 / minute, about one-third to one-half of the weight of aluminum (alloy).

그 다음에, 탈형한 팬(1)을 무전해 도금조에 넣어 5∼20㎛ 두께의 무전해 니켈도금(3)을 행하는 것이다. 무전해 도금은 환원제의 산화에 의해 방출되는 전자이온이 금속이온에 전이되어 금속피막을 형성하는 화학도금에 의해 발포 스티롤 등의 부도체 상에도 양호한 밀착성을 갖고서 피막될 수 있으며, 특히 Ni-P(니켈-인)합금에 의한 무전해 니켈도금은, 팬(1)과 같은 복잡한 형상에 있어서도 균일한 막 두께로 피막을 형성하는 막 두께 정밀도가 극히 높으므로(±5%), 일체 성형으로 얻은 팬(1)의 중량 밸런스를 손상시키는 일이 없게 하고 표면경도를 높여, 내식성이 우수한 것으로 할 수 있다. 또한, 무전해 니켈도금은 연성(延性)이 높으므로 송풍시 저항에 의한 미소 변형에 대해서도 추종성과 복원성이 우수한 것이 된다. 이 무전해 니켈도금에 의해, 발포 스티롤의 약점인 내약품성, 내유성 등이 향상되며, 발포 스티롤이 손상됨으로 인해 발생하는 발진(發塵)을 방지하고, 또한, 발포 스티롤로부터 발생하는 가스를 가두어 클린 룸 안으로 불어 들어오는 것을 방지할 수 있다. 또한, 내열성이 향상됨으로 인해 소방법상에서 요구되는 난연성 수치를 클리어 할 수도 있는 것이 된다.Next, the demagnetized fan 1 is placed in an electroless plating bath to perform electroless nickel plating (3) with a thickness of 5 to 20 m. Electroless plating can be coated with good adhesion to nonconductive phases such as foamed styrol by chemical plating, in which electron ions released by oxidation of a reducing agent are transferred to metal ions to form a metal coating, and in particular, Ni-P (Phosphorus) alloy, the electroless nickel plating has a very high film thickness accuracy (+/- 5%) for forming a film with a uniform film thickness even in a complicated shape such as the fan 1, 1) is not damaged and the surface hardness is increased, so that the corrosion resistance can be made excellent. In addition, since electroless nickel plating has high ductility, it is excellent in followability and resilience against fine deformation due to resistance during blowing. This electroless nickel plating improves the chemical resistance and oil resistance which are weak points of the foamed styrol and prevents the dust generated due to the damage of the foamed styrol and also prevents the gas generated from the foamed styrol from being cleansed It is possible to prevent blowing in the room. In addition, since the heat resistance is improved, the flammability value required in the fire fighting law can be cleared.

이상과 같이 하여 제조한 팬(1)은, 모터축 접합용 보스(D)를 모듈(4)에 고정한 모터(5)의 축(5a)에 끼워 붙여, 나사(6) 잠금 고정한다. 이 모듈(4)을 외측 상자에 장착하여 팬 필터 유닛(6)으로 하는 것이다. 팬(1)이 극히 경량화됨으로 인해 모터(5)는 종래에 견주어 소형의 것을 사용해도 규정 회전수까지의 기동(起動)시간을 짧게 할 수 있다. 또한, 팬(1)의 경량화에 의해 수송시의 진동 발생이 저감되어 변형 등에 의해 언밸런스가 발생하는 것, 모터 베어링이 손상되는 것 등이 예방되게 되며, 또, 흡음성(吸音)이 큰 발포 스티롤로 형성함으로써, 특별한 방진구조를 설치하는 일이 없게 하여 바람 가르는 소리나 모터로부터의 진동을 감쇠(減衰)할 수 있는 것이 된다.The fan 1 thus manufactured is fitted and fixed to the shaft 5a of the motor 5 fixed to the module 4 by fixing the motor shaft splicing boss D to the screw 6. And the module 4 is mounted on the outer box to form the fan filter unit 6. Since the fan 1 is extremely lightweight, the starting time of the motor 5 up to the specified number of revolutions can be shortened even when the motor 5 is small in comparison with the conventional one. In addition, by reducing the weight of the fan 1, the occurrence of vibration during transportation is reduced, unbalance is generated due to deformation and the like, motor bearings are prevented from being damaged, and the like, Thereby preventing the installation of a special anti-vibration structure, so that it is possible to attenuate vibration of the wind or noise from the motor.

산업상의 이용 가능성Industrial availability

본 발명의 발포 스티롤제 팬은, 신규의 팬 필터 유닛의 팬 또는 기존 팬의 교환용으로서 넓게 이용되는 것이다.The foamed styrol pan of the present invention is widely used for replacing a fan of a new fan filter unit or an existing fan.

1 팬
1a 주지지부재
1b 부지지부재
1c 날개부재
1d 모터축 접합용 보스
2 금형
3 무전해 니켈도금
4 모듈
5 모터
5a 모터의 회전축
6 나사
7 외측 상자(外箱)
8 팬 필터 유닛1 fan
1a main support member
1b part supporting member
1c wing member
1d Boss for motor shaft splicing
2 mold
3 Electroless nickel plating
4 modules
5 Motor
5a Rotation axis of the motor
6 screws
7 Outer box (outer box)
8 Fan filter unit

Claims (1)

클린 룸 내에 클린 에어를 공급하는 팬으로서, 폴리스티렌 세립상(細粒狀) 비즈를 10∼30%의 저발포율로 한정시킨 발포와, 그 각 발포 비즈를 일정 시간을 들인 사일로 내 숙성에 의해 내부 압력을 안정시킨 후, 헥사ㆍ브로모ㆍ시클로ㆍ도데칸(HBCDD)의 자기소화성(自己消火性)이 높은 난연 조제(助劑)를 이겨넣어서 첨가하여 팬 성형용 금형 내에 충전해서 성형하는 것에 의해 판금제에 가까운 판 두께와 난연성을 구비하고 또 사출 성형 플라스틱 제품과 동일하게 강도를 높게 하여 이루어지는 팬을 형성하도록 한 것을 특징으로 하는 팬 필터 유닛의 팬 구조.As a fan for supplying clean air into a clean room, there are foamed polystyrene granular beads having a low foaming ratio of 10 to 30%, and a plurality of foamed beads, which are aged in a silo After the pressure is stabilized, a flame retardant auxiliary having a high self-extinguishing property of hexa-bromo-cyclo-dodecane (HBCDD) is added and added to the mold for fan molding to be molded Characterized in that a fan having a plate thickness close to that of a sheet metal and flame retardancy and having the same strength as the injection molded plastic product is formed.
KR20120079552A 2011-09-12 2012-07-20 A structure of the fan in a fan filter unit KR101483339B1 (en)

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