AAF濾網(wǎng)培訓(xùn)方案.ppt

1、Better Air Is Our Business,AAF Training Brief,為什么要使用過濾器進行過濾？ 空氣過濾器原理 AAF過濾器種類及參數(shù) 空氣過濾器的測試和標準 安裝,操作和維護,Better Air Is Our Business,粗劣的空氣過濾的后果,粗劣的空氣過濾,粗劣的清潔系統(tǒng)和室 內(nèi)空氣質(zhì)量,建筑里人們的舒適，健康生活和生產(chǎn)的負作用 SBS (= 病態(tài)建筑綜合癥) 和 BRI (= 建筑疾病),Better Air Is Our Business,建筑綜合癥 (SBS),伴隨急劇不適的癥狀: -頭痛 -注意力不集中 -呼吸困難 -皮疹 -上呼吸道問題 -惡心

2、-疲勞 -視力模糊 -其他 原因不易被發(fā)現(xiàn) 離開建筑物可減輕痛苦,Better Air Is Our Business,與建筑物有關(guān)的疾病 (BRI),疾病: -退伍軍人病 -敏感性肺炎 -過敏性鼻炎 -濕熱癥 -哮喘 -毒枝菌素中毒 -內(nèi)毒素中毒 需要立即關(guān)注 以臨床癥狀表現(xiàn) 比 SBS更嚴重: 延長的痊愈時間,Better Air Is Our Business,空氣中的無生命和生物微粒污染物影響,灰塵 20%,細菌12%,玻璃纖維 5%,尾氣 4%,香煙煙塵 3%,其他 28%,真菌 28%,HBI的一份調(diào)查顯示真菌和細菌是低劣的IAQ的主要原因 大約70%室內(nèi)空氣質(zhì)量差的建筑是由空氣傳

3、播的微粒造成的，可用適當(dāng)?shù)目諝膺^濾解決 大約40%室內(nèi)空氣質(zhì)量差的建筑的主要原因是生物微粒（細菌，真菌孢子和他們的副產(chǎn)品）,資料來源: 世界建筑衛(wèi)生,Better Air Is Our Business,過濾器如何工作？,過濾器攜帶無生命的微粒和微生物包含微粒 生物穩(wěn)定劑抑制濾紙上的真菌和細菌的生長 生物穩(wěn)定劑減少在濾紙上和穿過濾紙的微生物的生長潛力 過濾器的結(jié)合面和空氣過濾器的生物穩(wěn)定劑阻止微生物下移到呼吸區(qū)域 抗菌劑也能有效對抗一些微生物引發(fā)的異味,Better Air Is Our Business,Principles of Air Filtration空氣過濾器原理,Physics

4、of Filtration Technology過濾原理,Better Air Is Our Business,Physics of Filtration Technology過濾原理,There are six basic physical phenomena, of which four are applied to common air filter products以下有六種基本的物理過濾原理，其中四種過濾原理在空氣過濾器里最常見 Sieving篩分 Inertial separation慣性分離 (viscous) impingement粘貼抗擊 Interception捕捉 Dif

5、fusion擴散 Electrostatic charged filtration (active and passive)靜電吸附 有：(主動和被動),Better Air Is Our Business,Physics of Filtration Technology過濾器原理,Sieving篩分 Particles are retained as the physical size is larger than the opening of the mesh 尺寸較篩孔大的微粒被留下 Not used in common air filtration, although some ver

6、y large particles may get sieved out of the air 通常不應(yīng)用于空氣過濾器中，盡管一些大的微粒可能被從氣體中分揀出來,Better Air Is Our Business,Physics of Filtration Technology過濾原理,氣流,引力,沉淀物,Inertial separation慣性分離 Particles are removed from the airflow by gravitational forces由于地球引力的作用，空氣中的部分微粒被分離出來 Principle is applicable to (very) l

7、arge particles on which gravitational forces can act 此原理適用于非常大的微粒，可由重力分離 Applied in Cyclones and Dust Louvre inertial separator 應(yīng)用于旋流收塵器和百葉窗惰性分離器,Better Air Is Our Business,Physics of Filtration Technology過濾原理,(Viscous) Impingement:粘貼并抗擊 Principle is based on as many particles as possible colliding

8、(impinging) and sticking to filter media（原理是基于很多微粒盡可能撞擊以及粘帖在過濾器上） An efficient adhesive is required to retain heavy particles (viscous adhesive) 需要一種有效的粘合劑來保留重的微粒（較粘的粘合劑） Principle is used in prefilters and is effective for large, heavy particles only（僅適用于早期過濾，而且僅對大、重的微粒有效） Filter media should have

9、as many large fibers as possible to increase particle impingement 過濾介質(zhì)應(yīng)該有很多大的纖維，可以用來提高微粒的撞擊。 A high air velocity, typically 1.5 to 3.0 m/s, to increase collision/impingement ratio. 高的氣流速度，通常1.5到3.0米/秒，可提高撞擊比率。,Better Air Is Our Business,Physics of Filtration Technology過濾原理,Viscous Impingement粘貼并抗擊,B

10、etter Air Is Our Business,Physics of Filtration Technology過濾原理,Interception捕捉法 Principle is based on intercepting as many particles as possible in fine packed fleece of filtration media 此原理基于在大量微粒中攔截被過濾器介質(zhì)群集在一起塵絮 A low media velocity, typically 0,1 m/s, is required to achieve effective air filtratio

11、n and to avoid blow-off 低速度，通常0,1 米/秒，需要高效且?guī)в泄娘L(fēng)系統(tǒng)的空氣過濾器來完成 The incidence of interception is increasing with particle size until a point is reached where the particle will be re entrained into the air stream 攔截的范圍可隨著微粒的大小增長，直到達到一個微粒可以被重新輸入到氣流中的一個臨界點。 Principle is used in medium efficiency filters 此原理

12、被應(yīng)用于中效的過濾器,Better Air Is Our Business,Physics of Filtration Technology過濾原理,Diffusion擴散 Principle is based on very small particles having very little mass and therefore behaving like gas molecules 此原理基于具有非常小密度的非常小的微粒，比如氣體分子 Collision with the gas molecules results in randomly moving particles and is

13、known as Brownian movement 隨機運動的氣體分子相互碰撞的結(jié)果，如眾所周知的布朗運動 Intercepting as many particles and thus achieving affective air filtration , requires a very low media velocity of typically 0.02 m/s 大部分微粒的攔截是在高效空氣過濾器里完成，需要的速度非常小，通常是0.02 米/鈔 The molecular forces of attraction, known as Van der Waals force, tha

14、t exist between particles and media, retain the particle on the filter media 分子的擴散力，如凡得瓦爾引力，存在于微粒和介質(zhì)之間，過濾器會把微粒留住。 Principle is therefore getting more effective, the smaller and lighter the particle is. 此原理更高效，微粒更小、更輕 The principle is used in medium and high efficiency filters 此原理用于中高效過濾器,Better Air

15、Is Our Business,Physics of Filtration Technology過濾原理,Diffusion擴散,Interception 捕捉,Better Air Is Our Business,Physics of Filtration Technology過濾原理,Active electrostatic charged filtration靜電吸附 Principle is based on positively charged particles being attracted onto oppositely charged plates 此原理基于帶正電荷的微粒與

16、帶負電荷的微粒在電場中互相撞擊。 Dust particles are held on the plate by viscous adhesive coating 灰塵微粒在電場中被吸附。 On the plates particles agglomerate before being blown into a secondary filter or being washed down 在電場中，微粒在被吹進第二層過濾器中或者被清洗掉前先凝聚。 Principle is effective for all particle sizes and effectiveness depend on a

17、pproach velocity and charge 此原理對所有尺寸的微粒有效，其效用取決于電荷所能達到的速度。 Because of high investment cost and maintenance not very common in general HVAC installations 由于高的成本和維護費用，在通常的暖通設(shè)備安裝里面并不常用。 Principle is used for large industrial dust collectors (electrostatic precipitators) and small self-contained unitary

18、 collectors for ultra fine sub micron particulates and aerosols such as tobacco smoke, welding fumes and oil mist 此原理用于大型的工業(yè)塵埃收集器（電收集器）和小容量的用于更精細的微粒與浮質(zhì)的收集器 ，比如煙霧， 焊接煙，油煙,Better Air Is Our Business,Physics of Filtration Technology空氣過濾器技術(shù)原理,Active electrostatic charged filtration主動靜電吸附過濾,Better Air Is

19、 Our Business,Physics of Filtration Technology過濾原理,Passive electrostatic charged filtration被動靜電吸附過濾,Better Air Is Our Business,Physics of Filtration TechnologyEffective All-round Particle Removal過濾器技術(shù)原理多方面有效去除微粒,Involves use of different types of filter包括不同使用類型的過濾器 Coarse filter粗效過濾器viscous impingem

20、ent粘貼抗擊 Medium Efficiency filter中效過濾器interception and diffusion攔載和擴散 HEPA filter高效過濾器diffusion擴散,過濾器種類,板式過濾器 褶皺式過濾器 袋式過濾器 箱式過濾器 高效過濾器 自動卷式過濾器,Better Air Is Our Business,板式過濾器:,性能: 合成纖維或玻纖 紙板或自封框架 風(fēng)速:1.52.5m/s 初阻力:6085pa2.5m/s 終阻力:250pa 分類:ASHRAE Arrestance (70%85%) 應(yīng)用: 商業(yè)或工業(yè)領(lǐng)域; 初效預(yù)過濾器 選擇: 遞增式密度濾料; 承

21、受壓縮的張力; 框架硬度,Better Air Is Our Business,褶皺過濾器:,性能: 棉/聚酯混合濾紙 硬模切割框架,鐵絲網(wǎng)支撐; 風(fēng)速:1.52.5m/s 初阻力:50-80pa2.5m/s 終阻力:250pa 分類:ASHRAE Dust spot (25%30%) 應(yīng)用: 商業(yè)或工業(yè)領(lǐng)域 作為預(yù)過濾器防止塵埃積累于暖通空調(diào)的盤管、風(fēng)機和管槽內(nèi)； 作為預(yù)過濾器延長高效過濾器的壽命 選擇： 適宜的褶間距； 過濾器的框架硬度； 耐濕度性；,Better Air Is Our Business,袋式過濾器:,性能: 玻纖或人造纖維濾紙 濾袋數(shù)量; 風(fēng)速:1.83.0m/s 初阻力

22、:50-180pa2.5m/s 終阻力:250pa 分類:ASHRAE Dust spot (40%95%) 應(yīng)用： 商業(yè)辦公建筑、工業(yè)領(lǐng)域 選擇： 適宜的濾紙面積； 無切削開口； 適宜的濾袋數(shù)量； 框架的堅固性；,Better Air Is Our Business,箱式過濾器:,性能: 玻纖或人造纖維濾紙 堅固的框架,鋁箔或熱塑性膠分隔板; 風(fēng)速:2.53m/s 初阻力:100-150pa2.5m/s 終阻力:300pa 分類:ASHRAE 計數(shù)法 (60%95%) 應(yīng)用： 商業(yè)或工業(yè)領(lǐng)域； 可變風(fēng)量（VAV）系統(tǒng)； 空間局限處 選擇： 適宜的濾紙面積； 過濾器框架的堅固性； 過濾器空所旁

23、通緊密性； 無切削刀口 可燃性/可丟棄性,Better Air Is Our Business,高效過濾器:(HEPA,ULPA),性能: 微細玻纖濾紙 堅固的框架,鋁箔或熱熔膠分隔物; 風(fēng)速:1.252.5m/s 初阻力:250pa1.25m/s 終阻力:500600pa 分類:ASHRAE 99.97%0.3um 應(yīng)用： 半導(dǎo)體、電子工業(yè) 醫(yī)院、醫(yī)藥行業(yè) 食品加工業(yè)，實驗室 選擇： 性能的保證； 高質(zhì)量的材料/工藝； 效能力等級的范圍，以適合應(yīng)用的范圍,Better Air Is Our Business,Air Filter Testing for General Ventilation

24、空氣過濾器流通空氣檢測標準,Europe & USA 歐洲 & 美國,Better Air Is Our Business,Filter Testing: Why? 空氣過濾器測試:為什么?,Three major concerns in regards to air filters: 空氣過濾器的三個主要內(nèi)容： What will be the efficiency of the filter in removing the airborne contamination (usually dust and in a specific size)? 過濾器怎樣才能更有效地去除空氣中的污穢（通常

25、是特定大小的塵埃）? How much of this dust will it remove before maintenance is required? 在需要維護以前有多少塵埃被清除？ What resistance will the filter offer to airflow? 過濾器對氣流有什么影響？,Better Air Is Our Business,Filter Testing Standards: History? 空氣過濾器檢測歷史標準有哪些?,USA Standards美國標準 亞利桑那州公路灰塵良好Arizona Road Dust Fine 美國采曖，制冷與空調(diào)

26、工程師學(xué)會ASHRAE 52.1 1992 美國采曖，制冷與空調(diào)工程師學(xué)會ASHRAE 52.2 1999 American （美國） Society of （社會） Heating, （采曖） Refrigerating and （制冷） Air Conditioning （空氣條件） Engineers（工程師）,European Standards歐洲標準 EuroVent 4/5 DIN 24.185 EN-779 1993 EN-779 - 2002,Better Air Is Our Business,Filter Testing Standards: History空氣過濾器檢測

27、標準: 過去,The test results of the ASHRAE 52.1 - 1992 and the EN-779 1993 could be easily compared, you only needed to watch the test parameters 美國采曖，制冷與空調(diào)工程師學(xué)會測試結(jié)果52.1 - 1992和EN-779 1993不容易比較，不過你可以注意其測試參數(shù)。 The ASHRAE 52.2 1999 and the EN-779 2002 are more difficult to compare as the classification syst

28、em is not the same 因為類別不同，所以美國采曖，制冷與空調(diào)工程師學(xué)會52.2 1999 與 EN-779 2002 很難比較。,Better Air Is Our Business,Filter Testing Standards過濾器檢測標準,The standards have evolved to address: 標準改進如下： Indoor air quality and air cleanliness in occupied spaces: Health of occupants versus air cleanliness 內(nèi)部空氣質(zhì)量和空氣清潔度達標的空間：空

29、氣清潔度達到健康的標準。 Protection of products during process manufacture 保護制造加工產(chǎn)品 Protection of HVAC equipment 保護曖通系統(tǒng)設(shè)備 Standards makes it possible to compare the filters with each other 標準使得過濾器之間可以相互比較,Better Air Is Our Business,Criteria for testing:檢測標準: Initial resistance is measured over the clean filter

30、at 25% to 125% of nominal airflow 過濾器的除塵標準初阻力大于25%到125%的名義氣流。 Initial color test is measured with atmospheric dust 大氣塵埃以顏色為最初的測試標準 The filter will be loaded with ASHREA test dust 過濾器在包裝前必須一致經(jīng)過美國采曖，制冷與空調(diào)工程師學(xué)會塵埃測試 The color test + loading the filter will be repeated till the final resistance is reache

31、d 顏色測試+反復(fù)裝載過濾器直到最終阻力達到。 The average grafimetrical efficiency (Arrestance) en the average colorefficiency (Efficiency) will be calculated from initial till final resistance 從初始到結(jié)束將在平均顏色效率中計算出平均 測試 效率. The dust holding capacity (DHC) is calculated from the number of dust X average Arrestance 塵埃清除能力在X塵

32、埃平均數(shù)量中得出。,ASHRAE 52.1 - 1992 Methodology美國采曖，制冷與空調(diào)工程師學(xué)會 52.1 - 1992 方法論,Better Air Is Our Business,ASHRAE 52.1 - 1992 Methodology美國采曖，制冷與空調(diào)工程師學(xué)會 52.1 - 1992方法論,Grafimetrical test碳酸鋅測試,Atmospherische test 大氣測試,測量壓力,氣流,過濾器終端,過濾器測試,存塵 瓶,過濾器測試,測量壓力,下游對象,上游對象,大氣空氣,Better Air Is Our Business,ASHRAE 52.1 -

33、 1992 Methodology美國采曖，制冷與空調(diào)工程師學(xué)會52.1 - 1992 方法論,1,2,3,4,1. Arrestance versus Dust Fed捕捉與塵埃反饋 2. Atm. Dust Spot Efficiency vs. Dust Fed塵埃跟蹤與塵埃反饋 3. Resistance versus Dst fed阻力與塵埃反饋 4. Resistance versus Rated Airflow (clean device)阻力與額定氣流（自潔設(shè)計）,ASHRAE Dust:美國采曖，制冷與空調(diào)工程師學(xué)會塵埃: 72 % AC fine test dust72%A

34、C良好塵埃測試 23 % Carbon black20%黑煙末 5 % Cotton lint5%塵絮,Better Air Is Our Business,EN779 1993 方法論,First European Standard for General Air Ventilation Filters歐洲最初標準是過濾器的空氣流通 ASHRAE test has been used as basis for EN779美國采曖，制冷與空調(diào)工程師學(xué)會以前測試標準基本是EN779 Repelaces EUROVENT 4/5 and national standards like DIN 24

35、.185廢除歐洲4/5與國家相似標準DIN24.185 Filters with initial dust spot efficiency 20% are classified as Efficiency Filters (F5 - F9). 過濾器的最初除塵率20%是當(dāng)做過濾器分類（F5-F9） Final pressure drop is 450 Pa最終壓力下降是450Pa,Better Air Is Our Business,EN779 1993 方法論,Initial efficiency 20%,過濾器類型,粗效過濾器,高效過濾器,EN779分類,初始效率20%,平均（am ）,捕

36、捉率（%）,平均（am ）,除塵效率（%）,最終（Pa ）,Better Air Is Our Business,ASHRAE 52.2 - 1999 Methodology美國采曖，制冷與空調(diào)工程師學(xué)會52.2 - 1999 方法論,Better Air Is Our Business,EN779 2002 分級,分類,表格1-空氣過濾器分類依照EN779,最終下降壓力Pa,平均捕捉（Am）綜合塵埃%,平均效率（Em）和0，4um色染%,Better Air Is Our Business,MERV versus EN-779 Table最大效率與EN779表格,Better Air Is

37、Our Business,Filter Testing: Test Rig過濾器測試：測試設(shè)備,Better Air Is Our Business,Global situation with two standards全球一致有兩個標準,Two different standards:不同的標準： One for EUROPE 一個是歐洲 One for USA 一個是美國 Classification system not the same, and difficult to compare分類系統(tǒng)不一樣，很難做比較 No life performance in MERV classifi

38、cation最大使用壽命分級 Initiative at ISO TC117 with EN779:2002 as ISO/CD 21220主動在ISO TC117和EN779：2002，ISO/CD21220,Better Air Is Our Business,EN1822,HEPA (High Efficiency Particulate Air Filter) and ULPA (Ultra Low Penetration Air Filters) testing and classification 高效率空氣粒子過濾器和超高效空氣粒子過濾器的測試與分類 H10-H14 HEPA f

39、ilters, U15-U17 ULPA filters H10-H14 屬高效空氣粒子過濾器， U15-U17 是超高效空氣粒子過濾器 The filter efficiency test on MPPS (Most Penetrating Particle Size) determines the Filter Classification 過濾器效率測試（最易穿透粒徑）決定過濾器的分類 Filter Efficiency Test 1.過濾器效率測試 Leak Test with smoke for the HEPA filters or automated test with part

40、icle counter for ULPA filters 2. 針對HEPA過濾器的煙低谷測試或者是針對ULPA 過濾器 2的用微粒測量器的自動測試。,Better Air Is Our Business,Physics of the Test Procedure檢驗過程和原理,Penetration versus Particle Size 滲透相反的微粒尺寸,99,999999,99,99999,99,9999,99,999,0,01,0,02,0,05,0,1,0,2,0,5,1,0,m,0,000001,0,00001,0,0001,0,001,E,P,1,5 cm/s,3,0 cm

41、/s,MPPS as function of media velocity for the same ULPA glass media MPPS作為同樣是ULPA玻璃介質(zhì)介質(zhì)速度的功能,Better Air Is Our Business,HEPA & ULPA Classification高效空氣粒子過濾器和超高效空氣粒子過濾器的分類,Smoke Test for H13 & H14 as Visual Scan accepted H13 和 H14公認視覺與自動掃描煙塵測試,AutoScan vs. Visual Smoke Test煙塵自動掃描，視覺測試,Better Air Is Ou

42、r Business,HEPA & ULPA Classification高效空氣粒子過濾器和低效粒子空氣過濾器的分類,Overall Efficiency to EN1822 for H12 to H14全部效率EN1822 從 H12 到 H14止,Overall Efficiency with Laser-Spectrometer全部效率用激光-分光計,Better Air Is Our Business,EN1822 Classification EN1822分類,Better Air Is Our Business,Ratings to EN1822EN1822額定,to EN182

43、2,Better Air Is Our Business,Fire Class Certification: UL防火體系證明：UL,UL: Underwriters Laboratories Inc. A filter can be listed in one or two categories: 過濾器能被劃分到下列兩類中： Class 1 Units體系1 Units集合 Class 2 Units體系2 Units集合,Better Air Is Our Business,Fire Class Certification: UL,Class 1 Units: 體系1 Units: 集合

44、 When clean, these filters do not contribute fuel when attacked by flame and emit only negligible amounts of smoke. The filter shall not produce flame or sparks when subjected to the Flame-Exposure Test. 清潔情況下，當(dāng)幾乎不帶煙塵的火焰襲擊過濾器，過濾器將不提供燃料；當(dāng)做火焰爆炸測試時，過濾器不會產(chǎn)生火苗或火星 Class 2 Units:體系 2 Units: 集合 When clean,

45、these filters burn moderately when attacked by flame or emit moderate amounts of smoke, or both. The filter shall not produce flame or extensive (25 or more) sparks which are sustained beyond the discharge end of the test duct when subjected to the flame-exposure test. 清潔情況下，當(dāng)幾乎不帶煙塵的火焰或者帶煙塵的火焰襲擊過濾器，

46、過濾器將適量燃燒。當(dāng)做火焰爆炸測試時，測試的放電結(jié)束后，過濾器將不會產(chǎn)生火焰或額外的(25 或者更多)火星。,Better Air Is Our Business,Fire Class Certification: 防火體系證明,French Fire Class Certification: 法國防火體系證明： This certification only applies to the media, not the filter itself 這個證明是唯一應(yīng)用于過濾器防火級別的標準。 M1 M2 M3,Better Air Is Our Business,Installation, Op

47、eration and Maintenance Training 安裝,操作和維護,Better Air Is Our Business,Installation of Built Up Filter Banks組合式過濾器組的安裝,Composed of individual holding frames調(diào)整好每個外框 Frames are attached to one another to form a bank to fit the space根據(jù)空間的大小將框架相互連接到一起 Frames are attached cia fasteners which are usually po

48、p rivets框架用扣件連接到一起,通常是波普鉚釘. Fitler bank is installed inside the plenum of duct section過濾器組安裝在導(dǎo)氣組件充氣部分的內(nèi)側(cè). Correct sizing of the cross sectional dimensions of the plenum/duct section is necessary 必須正確測量充氣/導(dǎo)氣組件的連接尺寸. System has to be properly levelled and plump 系統(tǒng)必須正確水平并充氣. Plenum or duct section has

49、to be free of dirt 充氣和導(dǎo)氣部分必須沒有雜質(zhì).,Better Air Is Our Business,Built-up Filter Bank組合式過濾器組,Better Air Is Our Business,Fastening Frames Together in Built-Up Filter Bank將框架和組合式過濾器組固定到一起,Filter frames are locked together using blind rivets 用空心鉚釘將過濾器框架連接到一起. Holding frames are usually pre punched to insta

50、ll the fasteners 外框通常都為方便連接已經(jīng)打孔.,Better Air Is Our Business,2至4英寸過濾器外框的連接組合,小的過濾器框可以先在一個平面上放在一起,然后移裝到它們的永久安裝位置上 大的裝置可以分開制造,然后作為小部件組裝,最后移到安裝位置. 大的過濾器組通常用硬棒在邊框兩條對邊見進行加固. 裂紋和小的縫隙可以被嵌填. 大的開口可以用特制的金屬條補好.,Better Air Is Our Business,Assembling Banks of Holding Frames 4 inch Deep外框厚度大于4英寸的組件組裝,Assembly and

51、installation usually takes place at the site where the bank is to be installed 組合和安裝通常在組件應(yīng)該被安裝的地方進行. Bank is built up row by row 邊緣一排排地連到一起. Minor cracks can be caulked 小的裂縫可以被嵌填. Larger openings can be closed by using custom made metal filter pieces 大的開口可以用特制的金屬條補好.,Better Air Is Our Business,V-Ban

52、k Filter ArrangementsV形過濾器組的安裝,Designed to handle a larger air capacity, typically 2,5 m/s 設(shè)計用于高風(fēng)量,例如2.5m/s The introduction of filters which can handle a higher face capacity eliminated the need for most V-bank arrangements 可以用適合高風(fēng)量下工作的過濾器替代V形過濾器組 Some filters because of their in-line depth cannot

53、be installed in V-banks 某些過濾器由于嵌入厚度不能在V形組件中安裝,Better Air Is Our Business,平展濾料過濾系統(tǒng),特制的平展形濾料被垂直安裝在特殊的固定框架上 濾料必須被很好地安裝在固定框架上,以防當(dāng)HVAC系統(tǒng)打開時濾料松垂. 所用濾料通常是合成纖維或者置于金屬框中,以便安裝到框架中. 采用合成纖維主要是因為它在安裝和移動的過程中不容易被損壞 框架系統(tǒng)通常包括一個周遍密封的設(shè)備來支撐濾片并防止側(cè)漏 有時作為其他過濾器組的前置過濾器使用,Better Air Is Our Business,壓降測量設(shè)備,每個過濾器組必須有它自己的壓降測量裝置

54、風(fēng)機的選擇,風(fēng)機的轉(zhuǎn)速,風(fēng)機的馬達,取決于氣流量和風(fēng)機面臨的阻力:過濾器組就是阻力之一 隨著灰塵在過濾器上堆積,過濾器的壓降增大. 當(dāng)某個時間過濾器的停用壓降達到時,就必須對過濾器進行更換了.,Better Air Is Our Business,壓降是判斷過濾器狀態(tài)的最好方法,當(dāng)壓降上升時，系統(tǒng)鼓風(fēng)機需要更大的功率將空氣吹過過濾器,這就增加了能耗和成本. 當(dāng)壓降到達某個點,初效和中效過濾器會由于濾料上的灰塵散落,導(dǎo)致過濾效率開始下降. 散落開始的壓降是過濾器已經(jīng)達到它的停用壓降并應(yīng)該更換的信號. 然而,其他機械式過濾器的效率會隨著壓降繼續(xù)上升. 壓降是決定過濾器是否應(yīng)該更換的測量指標,因為壓

55、降對系統(tǒng)的氣流產(chǎn)生影響.,Better Air Is Our Business,First Rule: Pre-Check Filters and Filter Banks第一條:預(yù)先檢查過濾器和過濾器組,Check Filter Holding Frames檢查過濾器固定框 Are they rigid enough?它們是否牢固? Have all fasteners been installed and secured?是否所有的鎖扣都已經(jīng)安裝并鎖緊. Are all the frame channels clean?所有的框架溝槽已經(jīng)清潔? Are the gaskets in tac

56、t?墊片是否到位? Are the proper quantity of fasteners and sealing mechanisms installed?是否安裝有合適數(shù)量的鎖扣和密封件? Have all the leaks and cracks between the holding frames and the plenum been caulked or closed? 固定框和實體上的所有漏點和裂縫是否已經(jīng)被填充和封閉?,Better Air Is Our Business,Filter Fasteners 過濾器鎖扣,Better Air Is Our Business,Clean Installation (潔凈安裝),Better Air Is Our Business,平板過濾器的安裝,安裝前檢查過濾器尺寸是否適合固定框 參考邊框或標簽上的方向箭頭,將過濾器安裝到它們的固定框中 過濾器上的方向箭頭表示系統(tǒng)的氣流方向 打開所有的固定件 將過濾器裝入框中,并關(guān)閉鎖扣將其固定,Better Air Is Our Business,Inst