HEPA过滤器

空气过滤器的工作原理空气过滤器是一种常见的设备，用于净化空气中的污染物。

它可以有效去除空气中的颗粒物和有害气体，提供更健康的室内环境。

以下是空气过滤器的工作原理的详细解析：1. 过滤层：空气过滤器中最重要的部分是过滤层。

过滤层通常由纤维材料制成，如纸、纤维玻璃、活性碳等。

这些材料具有细小的孔隙，可以阻止大部分颗粒物和有害物质进入过滤器内部。

2. 物理过滤：过滤层通过物理过程去除空气中的颗粒物。

当空气经过过滤层时，较大的颗粒物会被阻挡在过滤层表面，而较小的颗粒物会在纤维之间的空隙中被捕获。

这种过滤作用可以有效去除灰尘、花粉、宠物皮屑和其他空气中的固体颗粒物。

3. 吸附：某些空气过滤器还配备了活性碳过滤层，可以吸附有害气体和异味物质。

活性碳的表面积很大，并具有吸附能力，能够吸附并去除空气中的甲醛、苯、二氧化碳等有害气体。

这种吸附作用使过滤器能够净化空气，并改善室内空气质量。

4. 静电吸附：一些高端的空气过滤器采用了静电吸附技术。

通过给过滤层施加电荷，可以吸引和捕获空气中的带电颗粒物。

这种技术可以有效去除细菌、病毒等微生物污染物，提供更干净和健康的空气。

5. 预过滤：一些空气过滤器还配备了预过滤器，用于去除大颗粒物和粉尘。

预过滤器通常使用粗滤网，能够捕获大颗粒灰尘和杂质，防止其堵塞过滤层，延长过滤层的使用寿命。

6. HEPA过滤：HEPA（高效颗粒空气）过滤器是最常见的过滤器类型之一。

HEPA过滤器可以去除空气中99.97%以上的0.3微米以上颗粒物。

这种过滤器被广泛应用于医院、实验室和高端空气净化设备中，能够有效去除细菌、病毒、灰尘、花粉等微粒。

7. 定期更换：为了保持过滤器的有效性，定期更换过滤层是必要的。

根据使用环境的不同，过滤层的寿命通常为3个月至1年。

在更换过滤层时，应注意选择合适的规格和型号，确保其正常运行。

空气过滤器利用过滤层的物理和化学吸附作用，可以去除空气中的颗粒物和有害气体，提供更干净和健康的室内环境。

无尘车间设计原理1. 引言无尘车间（Clean Room）是一种能够控制空气微粒浓度、温度、湿度和静电等参数的封闭空间，被广泛应用于需要高度洁净环境的行业，如半导体制造、生物医药、精密仪器等。

无尘车间的设计原理主要包括空气过滤、正压控制、空气流动和静电控制等方面。

2. 空气过滤空气过滤是无尘车间设计的核心原理之一。

通过使用高效过滤器对进入车间的外部空气进行过滤，可以有效地去除悬浮颗粒物和微生物。

常见的过滤器有HEPA（High Efficiency Particulate Air）和ULPA（Ultra Low Penetration Air）两种。

HEPA过滤器是一种高效率颗粒空气过滤器，能够去除直径大于0.3微米的颗粒物，其效率达到99.97%以上。

ULPA过滤器则更加细致，能够去除直径大于0.12微米的颗粒物，其效率可达99.9995%以上。

在无尘车间中，通常会采用多级过滤系统，即将HEPA过滤器和ULPA过滤器结合使用。

通过层层过滤，可以有效地去除不同大小的颗粒物和微生物，从而保证车间内的空气质量。

3. 正压控制正压控制是无尘车间设计的另一个重要原理。

通过在车间内维持一定的正压，可以防止外部空气进入车间，并将车间内的污染物排出。

正压控制主要依靠空气供应系统和排风系统来实现。

空气供应系统通常采用无尘空调机组，能够对进入车间的新鲜空气进行处理。

首先，新鲜空气会经过预处理设备，如初效过滤器、加湿器等进行处理；然后，经过高效过滤器进行净化；最后，通过送风口向车间内供应洁净空气。

排风系统则用于将污染物排出车间。

在无尘车间中，通常会设置多个排风口，并将其与负压区域相连。

通过控制排风量和负压区域的压力差，可以将污染物迅速排出车间。

通过合理控制空气供应系统和排风系统，可以在无尘车间内维持一定的正压，从而防止外部空气进入车间，并保持车间内的洁净环境。

4. 空气流动空气流动是无尘车间设计的另一个关键原理。

通过合理控制空气流动方向和速度，可以将污染物迅速排出车间，并保持车间内的洁净环境。

空气过滤器质量保障措施空气过滤器是一种用于过滤空气中的杂质和污染物的设备。

它的质量保障措施对于空气净化的效果和用户健康至关重要。

下面我将介绍一些空气过滤器的质量保障措施。

首先，空气过滤器的材质是保障质量的重要因素。

优质的过滤器通常使用高品质的材料，如HEPA（高效粒子空气过滤器）和活性炭等。

HEPA过滤器具有高效过滤微小颗粒的能力，通常可以过滤掉95%以上的空气污染物，包括灰尘、花粉、细菌和病毒等。

活性炭具有吸附有害气体和异味物质的能力，能够有效净化空气。

因此，选择具有高品质过滤材料的空气过滤器是确保过滤效果的重要步骤。

其次，空气过滤器的设计和制造过程也是影响质量的因素。

优质的空气过滤器通常采用科学合理的设计和先进的制造工艺。

例如，过滤器应具有合理的过滤面积和过滤速率，以确保有效的过滤效果和适当的风量。

此外，过滤器的密封性也非常重要，以防止空气绕过过滤器而造成污染。

制造过程中的严格控制和质量检测也能确保每个过滤器的一致性和可靠性。

另外，空气过滤器的维护和更换也是质量保障的重要环节。

过滤器在长时间使用后会积累大量的污染物，影响过滤效果。

因此，定期清洁和更换过滤器是保持过滤器高效运行的重要措施。

厂商通常会提供清洁和更换过滤器的建议或指南，用户应根据具体情况进行操作。

此外，一些高质量的空气过滤器还会配备滤网更换提示功能，提醒用户何时更换过滤器。

最后，产品质量保证和客户服务也是空气过滤器质量保障的关键环节。

优质的厂商会对其产品进行严格的质量控制，并提供质量保证。

他们还会提供完善的售后服务，解答用户的疑问，并及时处理产品质量问题。

用户可以通过查看厂商的信誉和用户评价来选择可信度高的产品和生产商。

总之，空气过滤器的质量保障措施包括选择优质的过滤材料、科学合理的设计和制造、定期维护和更换过滤器以及提供可靠的售后服务。

这些措施将确保空气过滤器的高效工作，有效净化空气，保护用户的健康。

用户在购买空气过滤器时应考虑这些因素，选择高质量的产品和可信度高的厂商。

FFU（风机过滤单元）是一种用于实现空气净化的设备，它将风机、过滤器和底盘等部件集成在一起，通过风机产生负压和正压，以达到过滤空气的目的。

FFU广泛应用于医疗卫生、实验室、电子制造、食品加工和洁净车间等场所，具有净化效果好、安装方便、使用灵活等特点。

FFU的原理基于负压和正压的作用。

首先，通过装上空压机和一定数量的净化设备（如HEPA（高效率颗粒空气过滤器）），形成空压区。

在空压区负压状态下，通过空气净化装置，将气体中的异物、细菌等杂质进行过滤，提高空气质量。

然后，通过FFU的风机，引导空气进入正压区，在正压状态下，将净化后的空气均匀地送入室内，从而提供清洁的工作环境。

HEPA是FFU中重要的组成部分，它是一种高效的空气过滤器。

HEPA过滤器具有高效过滤、低阻力、易更换等特点。

它采用曲面组合纤维纸、纤维布或薄膜、金属网等材料制成，通过纤维自重和纤维之间的空隙捕捉尘粒、细菌和病毒等微小颗粒。

通常，HEPA过滤器的过滤效率可达99.95%或更高，过滤粒径一般在0.3微米左右，具有很好的过滤效果。

HEPA过滤器的工作原理基于多种机理。

首先，惯性碰撞使得颗粒靠近纤维，随着气流的减速，微小颗粒的速度远低于气流速度，从而发生沟积效应，使颗粒在过滤器中沉积。

其次，扩散效应使得微小颗粒随机碰撞纤维，从而停留在纤维上。

此外，静电效应也有助于捕捉带电颗粒，颗粒与纤维之间发生静电吸引力。

在FFU中，HEPA过滤器起到了重要的净化作用。

当空气经过HEPA过滤器时，其中的细菌、病毒、灰尘等微小颗粒被捕捉并停留在过滤器中，从而实现了空气的净化。

因此，HEPA过滤器的质量对FFU的净化效果至关重要，高品质的HEPA过滤器能够更好地过滤微小颗粒和微生物，提供更清洁的空气环境。

综上所述，FFU是一种通过风机、过滤器和底盘等部件集成的净化设备，基于负压和正压的作用实现空气净化。

HEPA过滤器作为FFU的组成部分，在净化过程中起到了重要的作用，通过多种机理捕捉微小颗粒和微生物，提供清洁的空气环境。

READ AND SAVE THESE INSTRUCTIONS!Please read instructions before installing and using the HEPA Bypass Air Filtration System (HEPA system). This will help you obtain the full benefit of the HEPA system you have selected. It will also help you to avoid needless service costs.1. Read this manual carefully. Failure to follow these rules and instructions could cause a malfunction of the air filter or unsatisfactory service and could void your warranty.2. Follow a regular service and maintenance schedule to ensure efficient operation.3. For safety and optimized performance of your HEPA system, all installation and maintenance must be performed by a professional heating and ventilation contractor. The installer should be made aware of your indoor air quality situation and be familiar with your heating, ventilation and air conditioning equipment.4. High particulate distribution may occur during initial start-up of this product after installation or after scheduled filter changes. Individuals who are highly sensitive to airborne particulates should not be in the building and allow 24 hours of operation for removal of particulates from occupied spaces before re-entry.© 2015 Americair Corporation, Mississauga, Ontario, CanadaAIR CLEANERS/FILTERSAMAIRCAREHEPA BYPASS AIR FILTRATION SYSTEMHOMEOWNERS MANUAL & DEALER INSTALLATION INSTRUCTIONSFOR MODEL 10 000 ETPackage 1 of 1 contains:1 - HEPA System3 - Complete Filter Sets (Packed inside Unit)1 - Installation Instructions (this manual) 1 - Registration Card1 - Filter Changes Reminder Label Model 10 000 ET is designed to filter air up to arate of 1000 cfm.Rules for Safe Installation and Operation (1)Shipping and Packing List (1)Specifications (2)Introduction (2)General Information (3)Product Application Guidelines (3)Parts Identification (4)Physical Dimensions of Units (5)Dealer Installation Instructions ...............................6-8Operation (9)Maintenance (9)Filter Change Schedule (9)Filter Changing Guidelines (9)Dealer Filter Change Instructions (10)Dealer Motor Assembly Replacement Instructions (11)Electrical Diagram (11)Replacement Parts (12)Nom.AirFlow@**********”E.S.P.Weight (max - unpackaged)Supply VoltageNom. Measured Power ConsumptionMotor Current Draw - TotalAir Intake Collar (max)Air Outflow Collar (max)Operating Temp. Range - Return air (ºF)HEPA filter efficiency = 99.97% @ 0.3 micron particles Ambient temperature range: -40ºF to 130ºFFor 220 VAC Units (only sold outside N. America) Nom. Measured Power ConsumptionMotor Current Draw - Total 10 000 ET 1000 cfm 130 lbs. 120 VAC 600 Watts 4.8 amps 10”x12”10”x12”30 to 95 300 Watts 1.2 ampsCongratulations! You will quickly realize that you have purchased a very effective air cleaning system. It incorporates state of the art HEPA (High Efficiency Particulate Air) technology.Your Amaircare HEPA system comes with a limited warranty. With proper attention to its care and maintenance, you will receive optimum performance.If your indoor air has abnormally high concentrations of particulates, the life span of the filter media may be shortened. Excessive particulates in the air will reduce the expected life of the HEPA filter. Under normal conditions the HEPA filter will last from two to five years. Optional activated carbon canisters have a finite limit as to the amount of odor or other gaseous volatile organic compounds (V.O.C.’s) that they can adsorb. The higher the concentrations, the shorter the expected life. Higher humidity may shorten the life of carbon canisters. Under normal conditions, carbon canisters should last up to 12 months.Initially, the HEPA filter’s particulate removal efficiency improves with use. However, the air flow through the HEPA filter media will decrease, as dust builds up on the filter, thus lowering its ability to circulate and clean as much air as when it was new. If the air flow through your unit is noticeably reduced, you can inspect the prefilter and HEPA filter to see if they should be replaced. Replacement (or washing if foam) of the prefilter every 3 months will help extend the life of the HEPA filter. Please contact your local Amaircare dealer regarding replacement of filter media, warranty information or if you have any questions or concerns about the performance of your HEPA system.NOTE: This filtration system is an ADDITIONAL filter, and does NOT replace the existing air handler/furnace system filter.Media FiltersMedia filters strain particulates from the air. The filter media needs to have tiny holes to allow air to pass through, but not particulates. Filter types vary for all sorts of purposes. The most effective and proven filter media is HEPA. HEPA filter media is 99.97% efficient at capturing particles which are 0.3 micron in size or larger.Carbon FiltersCarbon media is used to capture chemicals and odors, also referred to as V.O.C.’s. Chemicals and odors cannot be captured with media type filters. Activated carbon collects chemicals and odors in a process called adsorption. If air passes through the carbon filter before particulates are removed, the surface of the carbon quickly gets covered with particulates, rendering it ineffective at capturing chemicals and odors. If particulates are removed from the air with a HEPA filter, virtually the entire surface area of the carbon can be used to capture chemicals and odors. This increases the efficiency and filter life of the carbon filter. Separate HEPA and Carbon FiltersHEPA and carbon filters have different life spans. It is important for a filtration system to keep the filter components independent from each other, so that the filter that is dirty/saturated can be changed. This is more economical than a system where you need to throw out two or three filters when only one needs changing.The HEPA System’s 3 Stage Filtration ProcessThe 3 stage filtration process is used to create a very effective filtration system. Each filter is independent and can be changed individually.• Stage 1: Prefilter - The prefilter (foam) removes larger particulates from the air, thus prolonging the life of the HEPA filter.• Stage 2: HEPA - The HEPA filter removes 99.97% of particulates 0.3 micron and larger. The cleaned air then passes through the third stage filter.• Stage 3: Carbon - The carbon filter is about 1/2 an inch thick to give it plenty of surface area for removing chemicals and odors from the air. This filter may be replaced by an optional heavy duty granular carbon canister available for maximum removal of chemicals and odors. The clean air is then reintroduced into the air you breathe.Cabinet PartsInside Cabinet (Filter Section)figure 1.figure 2.Easy Twist HEPA Cartridge Partsfigure 3.figure 5.Model 10 000 ET:Forced air handler/furnace systems:The HEPA system should be installed as a bypass system, with part of the return ducted into the HEPA system. The filtered air is then rerouted back into the return air, and continues through the system to be heated/cooled.Independent Operation:The HEPA systems can be used independently of any other equipment! The intake and outflow of the filtration system can be ducted into the same room to create a cleaner environment almost anywhere. The intake or outflow can also be ducted elsewhere. The intake and outflow should be installed on opposite sides of the room; however, this varies according to your specific needs.1.Make sure that the unit is plugged into a grounded outflow (120 Volt, 60 Hz).2.For optimum performance, the HEPA system should operate when the indoor air handler/furnace blower is on.3.Turn the unit on by rotating the variable speed dial clockwise. The unit starts in High speed, turn all the wayclockwise for low speed.4.To turn the unit off, rotate the variable speed dial counter-clockwise until you feel or hear it click into the ‘off’position.Proper care and maintenance of your HEPA system will ensure years of service. The unit must be turned off during service/maintenance or when filters are being changed.It is recommended that gloves and a filtered breathing mask be worn during filter replacement.Filter Change ScheduleNote: Note: Failure to properly maintain your HEPA system will decrease the efficiency and air flow. PreFilter: 1 year (foam prefilters can be washed every few months and reused)HEPA Filter: 2 to 5 yearsInner Carbon Filter: 6 monthsOptional Carbon Canister: 12 monthsNOTE: Filter life is based on average air content. Some filters may need to be changed more often due to higher amounts of dust, humidity, or chemicals found in your ambient air. Additionally, people who are more sensitive to these airborne contaminates may desire more frequent filter changes.Filter Changing GuidelinesPrefilter:Dust and other large particles will collect on the prefilter over time. The color of the filter will change as particulates build up on the prefilter. Change the prefilter when you can see the particulate build up start to clog up the prefilter.HEPA Filter:As the HEPA filter captures particulates, it will darken over time. Replace the HEPA filter when it darkens to the level seen in example D.Inner Carbon Filter:The inner carbon filter will rarely look used. This filter captures odors and gasses, yet the filter’s appearance will not change. When this filter has reached it’s maximum adsorbancy of odors and gasses, it will no longer work. Replace this filter when it no longer seems to capture odors, or every 6 months (12 months foroptional Carbon Canister), which ever occurs first.A. NewB. UsedC. UsedD. ReplaceIt is recommended that gloves and a filteredbreathing mask be worn during filter replacement to avoid breathing particulates (dust, mold, pollen, etc.) captured on the filter that become airborne during the filter(s) changeout.The old filters should be wrapped and sealed inplastic bags immediately upon removal from theunit to avoid distributing particles throughout thehouse during the process of disposal.1. Accessing the filtersa. Remove safety screw(s) from HEPA filter access panel.b. Pull the HEPA filter access panel up by the finger tabsand lift out to remove.c. Bracing the unit so it does not move, turn the HEPAcartridge counter-clockwise and lift/pull out.2. Prefilter Replacementa. Pull the prefilter up and off the HEPA cartridge.NOTE: The prefilter may contain contaminants, remove itslowly to avoid releasing particles back into the air.b. Foam prefilters can be washed several times, wash by hand in warm water. Let dry completely before placingback onto the HEPA cartridge.b. If replacing the filter, remove plastic shrink wrap from thenew prefilter.c. Stretch the new/washed filter around the top of the HEPA cartridge and slide it down into place.3. Inner Carbon Filter Replacementa. Look inside the HEPA cartridge to locate the two ends ofthe inner carbon filter.b. Pull one end of the old inner carbon filter in and bend itinto a loose roll so it can be removed.c. Remove the inner carbon filter from the HEPA cartridge.d. Remove plastic shrink wrap from the new inner carbonfilter.into the unit.b. With each annual filter replacement kit, a new ‘o’ ring isprovided. The old one is removed by pinching it between two fingers and pulling it off the collar on the blower deck.c. Discard old ‘o’ ring.d. Place the new ‘o’ ring onto the collar and slide it down tothe base of the blower deck.5. Optional Carbon Canistera. Remove old carbon canister (if installed) by pulling it outfrom the inside of the HEPA filter.b. If replacing an inner carbon filter with the carbon canister,remove inner carbon filter by following the steps a. to c. in section 3.c. Remove the plastic shrink wrap from the new carbon canister.d. Slide the carbon canister into the HEPA cartridge, smaller end first. The carbon canister should slide all the way in until the metal edges at the base meet the HEPA filter.e. Support the carbon canister with your fingers so it does not slide out when replacing the HEPA cartridge assembly into the unit.6. Installing the HEPA Filter Cartridge a. With the filters changed or inspected, all 3 filters areready to be placed back into the unit. Place the HEPA cartridge gently into the unit (if a carbon canister is being used, take care not to let it slide out as it is heavy and could damage the unit)b. When the HEPA cartridge is in place, brace the unit, pressthe filter into the adaptor and gently turn it clockwise until it locks into place. If too much force is used, the cartridge may be difficult to remove.c. Replace the HEPA filter access panel.d. Re-install safety screw(s) into HEPA filter access panel.e. Plug the unit back into a power outflow and turn it on.3. Installing the new motor assemblya. Slide the new motor into the motor mount makingsure that the wires go through the smaller hole offset from the center of the bracket.b. Secure the new motor to the motor mount with thefour screws removed in step 2c.d. Connect the wires as follows:- Blue wire from motor to the on/off switch. - Yellow/green wire from motor to the ground post. - Brown wire from the motor to a capacitor post. - Black wire from the motor to the other capacitor post.Replacement Parts for 10 000 ET Qty Required Canadian U.S.for Unit16 ET Standard Annual Filter Kit (1 Prefilter, 2 Carbon) 3 94004061 94014061 16 ET Plus Annual Filter Kit (1 Prefilter, 1 VOC Canister) 3 94004181 94014181 16 ET (Easy Twist) HEPA Filter Cartridge 3 90004437 90014437 Motor Assembly - 10,000 (120V) (1) As needed 99002700 99012700 Motor Assembly - 10,000 (220V) (1) As needed 99003300 99013300Use this unit only in the manner intended by the manufacturer.Questions? Comments? Need an Amaircare Dealer?Contact Amaircare at:1.800.268.7732******************。

高效过滤器，英文缩写是HEPA，它经常被应用于制药、电子、半导体、精密机械、制药、医院、食品等对洁净要求较高的行业。

由于它一般作为过滤末端，因此对高效过滤器的各项要求也非常严格，随着捕集灰尘越来越多，则滤层的过滤效率也随着下降，所以当到一定的阻力值或效率降到某值时，需要及时加以定期清洗，以保证洁净室洁净度的要求。

由于不同种类的高效过滤器使用周期不一样，所以检测的周期也一样。

但是一般来说，建议3~6个月检测一次。

这样可以很好的确定更换周期，从而延长设备的使用周期，降低保养成本。

说到这里，有人也许会问，那判断的方法是什么呢？有人说直接用用肉眼看，当发现空气滤芯上布满了灰尘时候就应该检测了。

确实高效过滤器的过滤效果是随着使用时间长短而变化的，使用时间长的，它的过滤效果就会下差点。

使用时间短的，它的过滤效果就好点。

但是还有一点容易被忽略的就是，被滤芯过滤掉的灰尘沉积在滤芯表面，反而会使滤芯的过滤效果有所上升。

所以，还是要使用专业仪器的检测仪器才能得出最终的结果。

杭州克林埃尔检测技术有限公司是一家行业独立商检机构，具有独立法人地位和第三方实验室地位。

为国内净化厂房和设备提供第三方检测、调试和咨询服
务。

公司拥有现代化实验室，使用的主要仪器设备有：ATI气溶胶光度计和发生器、64路温度验证系统、现场计量炉、臭氧浓度检测仪、大流量粒子计数器、Dragger压缩空气检测仪、TSI风量罩、气流流型检测仪等大中型检测仪器。

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新型吸尘器过滤结构设计为了提高吸尘器的过滤效果和使用寿命，我们设计了一种新型的吸尘器过滤结构。

该结构主要包括前过滤器、主过滤器和HEPA过滤器三部分。

前过滤器位于吸尘器的进气口处，其主要作用是阻挡较大的灰尘颗粒，防止其进入主过滤器和HEPA过滤器，从而保护主过滤器和HEPA过滤器不被灰尘堵塞。

前过滤器采用高效纤维布材料制成，具有较好的过滤性能和抗堵塞能力。

前过滤器还具有可拆卸的设计，方便用户清洁和更换。

主过滤器位于吸尘器的主体内部，是整个过滤结构的核心部分。

其主要作用是过滤空气中的微尘颗粒和细菌，防止它们从吸尘器排出，保持室内空气的清洁。

主过滤器采用HEPA材料制成，具有高效过滤性能，并且可以有效地阻止微尘和细菌的传播。

为了提高主过滤器的使用寿命，我们在主过滤器表面还添加了一层防粘涂层，防止灰尘过多粘附在主过滤器表面，影响其过滤效果。

HEPA过滤器位于主过滤器的后面，是最终过滤空气的关键部分。

HEPA过滤器具有更高的过滤效率，可以过滤掉更小的微尘颗粒和细菌。

为了进一步提高HEPA过滤器的过滤效率，我们在其表面增设了静电场，利用静电吸附原理将微尘颗粒更好地吸附在过滤器上。

为了延长HEPA过滤器的使用寿命，我们还为其设计了自动清洁装置，可以定期清洁HEPA过滤器上的灰尘。

我们设计的这种新型吸尘器过滤结构具有较好的过滤效果和使用寿命。

通过前过滤器、主过滤器和HEPA过滤器的有机组合，可以将吸尘器排出的空气中的微尘颗粒和细菌最大程度地过滤掉，保持室内空气的清洁。

可拆卸的设计和自动清洁装置方便用户的清洁和维护，延长了吸尘器的使用寿命。

这种新型吸尘器过滤结构的设计将为吸尘器的进一步发展和改进提供有力支持。

HEPA过滤器简介HEPA它是一种国际公认最好的高效滤材，最初HEPA应用于核能研究防护，现在大量应用于精密实验室、医药生产、原子研究和外科手术等需要高洁净度的场所。

HEPA由非常细小的有机纤维交织而成，对微粒的捕捉能力较强，孔径微小，吸附容量大，净化效率高，并具备吸水性，针对0.3微米的粒子净化率为99.97%。

也就是说：每10000个粒子中，只能有3个粒子能够穿透HEPA过滤膜。

因此，它的过滤颗粒物的效果是非常明显的！如果用它过滤香烟，那么过滤的效果几乎可以达到100％，因为香烟中的颗粒物大小介于0.5—2微米之间，无法通过HEPA过滤膜。

主要作用是过滤空气中方的微粒1基本信息HEPA(High efficiency particulate air Filter)，中文意思为高效空气过滤器，达到HEPA 标准的过滤网，对于0.1微米和0.3微米的有效率达到99.7%，HEPA网的特点是空气可以通过，但细小的微粒却无法通过。

它对直径为0.3微米（头发直径的1/200）以上的微粒去除效率可达到99.97%以上，是烟雾、灰尘以及细菌等污染物最有效的过滤媒介。

HEPA分PP滤纸、玻璃纤维、复合PP PET滤纸、熔喷涤纶无纺布和熔喷玻璃纤维五种材质。

特点：风阻小，容尘量大，过滤精度高，可以根据客户需要加工成各种尺寸和形状，适合不同的机型使用。

2HEP主要性质HEPA由非常细小的有机纤维交织而成，对微粒的捕捉能力较强，孔径微小，吸附容量大，净化效率高，并具备吸水性，针对0.3微米的粒子净化率为99.97%。

也就是说：每10000个粒子中，只能有3个粒子能够穿透HEPA过滤膜。

HEPA的过滤颗粒物的效果是非常明显的，如果用它过滤香烟，那么过滤的效果几乎可以达到100%，因为香烟中的颗粒物大小介于0.5—2微米之间，无法通过HEPA过滤膜。

HEPA高效率微粒滤网的滤净效能与其表面积成正比。

空气净化器的HEPA高效率微粒滤网呈多层折叠，展开后面积比折叠时增加约14.5倍，滤净效能十分出众。

1.HEPAHEPA是高效率空气微粒过滤网的简称，英文High Efficiency Particulate Air。

HEPA 应用于核产业、生物医学领域、吸尘器等。

对组成HEPA的材料有：PP高效滤纸、PET 滤纸、PP和PET复合高效滤纸、玻璃纤维高效滤纸等。

PP高效滤纸是以聚丙烯为原料经专用热熔法制成的新型过滤材料，产品耐酸碱，耐腐蚀，熔点高，性能稳定，无毒，无味，分布均匀，具有低阻，高效，高强度，环保等特点。

PP是纸类，一般不能水洗。

PET滤纸是采用涤纶树脂等材料熔喷而制成的，硬度高，挺度好，耐腐蚀，耐高温，性能稳定，常用在扫地机，吸尘器等过滤精度要求不高的家用电器或者大型清洁机器上面。

PP和PET复合高效滤纸是熔喷一层PP，然后再熔喷一层PET，融合了PP的优点和PET的优点，特点是容易成型，过滤精度又能保证;既有挺度，又能保证高精度过滤效果。

玻璃纤维高效滤纸的绝缘性好、耐热性强、抗腐蚀性好，机械强度高、过滤效率高、阻力低、容尘量大，缺点是性脆，耐磨性较差。

2.HEPA等级说明高效空气过滤器（high efficiency particulate air (HEPA) filter）用于进行空气过滤且使用GB/T6165规定的钠焰法检测，过滤效率不低于99.9%的空气过滤器（标准：GB/T 13554-2008）。

高效过滤器使用的滤料很薄，所以也称为滤纸。

现在使用的滤纸高效过滤器是折叠形滤纸过滤器，滤纸之间用波纹板分隔，滤芯的四周用粘合剂与外框固定并密封。

特点是滤料薄（厚度为0.5mm左右），折叠形过滤面积比迎风面积大几十倍，从而大大降低阻力（天津大学博士学位论文：高效纤维滤料最易透过粒径计数效率的研究；第5页）。

一般按照其过滤效率高低，将HEPA分为5个等级：粗效过滤器、中效过滤器、亚高效过滤器、HEPA高效过滤器、超高效过滤器。

详情如下图所示：3.纤维过滤器的过滤机理（教材：空气净化原理、设计与应用；第57~60页）空气净化领域将微粒污染物从空气中分离出来，主要采用带有阻隔性质的过滤分离法和电力分离法。