Detailed description:
* each hepa filter with all pass before they go out by performance testing, to ensure high efficiency air filter performance indicators;And can according to user requirements, production of a variety of standard sizes and filtering requirements of high efficiency air filter.
Is made of super fine glass fiber or PP material, such as glue or aluminum foil material folding dividers, new type polyurethane sealant seal, with wooden frame, stainless steel, galvanized box frame, aluminum frame is optional.
* is mainly used for filtering air suspended particles under 0.3 um, as various filtration system at the end of the filter;
Introduction: clean room in grade three hundred thousand levels than thousand hundred clean areas the reconfiguration of the air filter, the selection of the filter is generally selected according to the clean room level requirement.

　　100 grade purification: plate G4 (F5) + bag F7 (F8) + bag F9 + plate H13 + (duct end head filter unit);

　　1000 grade purification: plate G4 (F5) + bag F7 (F8) + bag F9 + plate H11 + (duct end head filter unit);

　　10000 grade purification: plate G4 (F5) + bag F7 (F8) + bag F9 + plate H11;

　　100000 grade purification: plate G3 (G4) ~ + F5 bag F7 (F8) + bag F9;

　　300000 grade purification: plate G3 ~ + F5 bag F6 ~ F8.

Hepa filter best level combination of clean room each hepa filter in front of the factory all pass by performance testing, to ensure performance of the hepa filter;And can according to user requirements, production of a variety of standard sizes and filtering requirements of high efficiency air filter.

* best grade clean room hepa filter combination low pressure loss, reduce energy consumption and reduce the operation cost and convenient installation;
* best grade clean room combination hepa filter resistance to humidity is 80%;80 ℃ heat resistance;Galvanized frame or aluminum frame, ABS plastic frame;

1 overview
Clean room for temperature, humidity and cleanliness are more strict requirements, and the guarantee of cleanliness is done through increasing the ventilation rate,The level of clean room, high efficiency filter, high efficiency air filterClean level is higher, the greater the air changes, such as a level 100000 required ventilation rate is not less than 15 times / 11, and the class of 100 is more than 360 times.
The choice of class 200 clean room ventilation equipment
Best grade clean room usually adopts the form of the area since the circulation fan to meet the requirements of ventilation rate, its practice is at best level area ceiling set number of turbines, best level in most of the return of the fan through the return air mouth suck, sent to condole carries on the static pressure and high efficiency filter box.In addition, the district level needed to supplement the cold (hot) the wind by the combined air processor by static pressure box, low-speed duct was in cold (hot) mixed with return air and wind after efficient filter to laminar flow manifold level to return to the area.
The information provided in accordance with the manufacturer, under the rated air volume, high efficiency filter resistance is usually at the beginning of 180 Pa, 2 times at the beginning of the end resistance of resistance, which is 360 Pa.So, when selecting A circulation fan, always put the total pressure of the fan in more than 400 Pa, the noise values are usually in 65 dB (A) above, if it is A number of turbines parallel running, according to the calculation formula of the total sound power level:
Lwz L + 。
Among them, the Lwz multiple sets of fan work at the same time the total sound power level, the dB;Lw, Y ~ sound power higher sound power level of a fan, a dB.Delta for additional sound power level.
The area ceiling fan noise level will reach about 70 dB (A), although the ceiling plenum are certain noise reduction effect and high efficiency filter, but best workspace is still in the noise level allows high.
In the process of engineering design, often easy to overlook a problem, it is through each air volume and high efficiency filter is actually did not reach the rated air volume.To a level 10 m2 of the clean area as an example, according to the cross section of the wind speed 0.3 m/s, the circulation of air volume for 10, 800 m3 / h, because the best grade clean area requirement with high efficiency filter, hepa filter hypothesis with specifications for 630 x 630, you need the number of 25 pieces.The rated air volume and high efficiency filter for 1, 000 m3 / h, at the beginning of its resistance to 186 Pa, the end resistance of 372 Pa, but in fact through each air volume and high efficiency filter of 432 m3 / h.Based on the relationship of air volume and velocity of flow, in the cross section area must be under the premise of the actual flows under rated wind speed and high efficiency filter for air wind speed of 0.432 times.According to the local pressure loss calculation formula:
Z= p／2。
Among them, the z for local resistance loss, Pa;As the local resistance coefficient;As the air velocity, m/s;P is the air density, kg.
The actual pressure loss and high efficiency filter for 0.432 times the rated pressure loss, namely the resistance at the beginning of 34.7 Pa, final resistance is 69.4 Pa.So, when choosing circulation fan, on the premise of satisfying the requirements of air volume and total pressure fan can be greatly reduced, natural fan noise and power consumption is decreased.
Three engineering examples,
3.1 project summary
Shanxi Province a microelectronic production workshop, workshop area of 600 m2, among them, the thousand grade clean area 806 m2, all levels of clean area 138 m2, common air conditioning area 480 m2.In addition, in the thousand grade clean area environment, and 5 level best clean areas.Party A clean areas summer indoor conditions for = 24 ℃ to 26 ℃, = 40% ~ 60%, the noise is less than 65 dB (A);Winter conditions for t = 22 ℃, 20 ℃ ~ < 60%, noise is less than 65 dB (A);Common area summer conditions for t = 26 ℃ ~ 28 ℃, < 60%, noise is less than 65 dB (A);Winter conditions for = 18 ℃, 20 ℃, < 60%, noise is less than 65 dB (A).
3.2 the calculation results and ventilation equipment selection
Via the palisade structure, equipment cooling, lighting, heat dissipation, human body cooling and fresh air load calculated comprehensive: workshop air conditioning cooling load of the total for 645 l [W, total heat load is 410 kW, thousand, million in total circulation air volume of 120 000 m3 / h, the new air volume is 20 000 m3 / h, equipment displacement is 000 m3 / h, and air volume calculation shortage of common air conditioning area. Air conditioning cold source is provided by two screw water chillers and heat source is provided by the factory boiler room; thousands, thousands of clean area air conditioning terminal equipment is an air capacity is 120 000 m3 / h, total pressure is 1 600 Pa modular air handling units, combination section contains A list of the mixing, filtering efficiency, at the beginning of cold, heat, moisture, and maintenance, in effect filter, blower, flow, noise elimination and air supply; 5 level best area with air volume is 1 800 m3 / h, total pressure is 180 Pa, noise is 54 dB (A) of 61 sets of low-pressure centrifugal fan, fan level in each area of the ceiling is divided into two groups of uniform arrangement.