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About wind curtain machine introduction and choice
Author： Source： Date：2012/11/13 9:42:54
About wind curtain machine introduction and choice
The air screen also is the wind curtain machine which we said, is most early introduces from the former U.S.S.R and the Japanese two countries to our country.The former U.S.S.R introduces is the hot air curtain, main application in China's north, when winter carries on the room partition to maintain warmth.Introduces our country's air screen from Japan, does not have the heating zone, mainly is the application south our country, when use air conditioning carries on the room partition to guarantee coldly, simultaneously is purifying the workshop the import and export to carry on the purification isolation.
Applied in our country's until now, these two kind of technologies already completely fused, in view of the different application neighborhood, already had the different air screen to meet its use need.Speaks of the air screen the application, must discuss first the air screen family classifies.Classifies from the use function, the air screen may divide into the air screen two big kinds which the hot air curtain and does not heat up; From installs in the form to be possible to divide into goes against blows the type and side-blown -like; Classifies from the air blower form, also may divide into the throughflow, the axis flows the type and the centrifugal type.Above each form, has its characteristic respectively in the use, but uses its goal, is needs to serve for three kinds: Energy conservation, pure and comfortable demand.
1. energy conservation air screens are one kind of energy conservation product.The air screen energy conservation is aims at each kind of building to guarantee cold and winter maintaining warmth in the summer.
Says regarding Chang an Kai ordinary gate, entry each square meter cold, heat loss, when construction interior for positive pressure, is equal coldly in 300m2, the heat loss, does not have the differential pressure when the construction internal and external, entry each square meter cold, the heat loss is also equal to the 70m2 cold quantity loss.
The example, guarantees the cold example by the summer, outside Shenyang's prosperous big family west gate, is apart from the gate 20 meter far place, still could feel the front door gushed out the air conditioning, the cold quantity lost obviously hugeness.When winter has many guesthouse great hall all to freeze the hand frozen foot, believed many people all have the similar experience.How can guarantee so big cold, the quantity of heat does not disappear? Certainly, the simplest method is blocks the entry, may very many places not be able to use this means, because must safeguard the human vehicle and physical distribution promptness and the unimpededness.By now applied the air screen was the most effective method.The use air screen seals a door, must achieve the ideal use effect, some two essential factors:
①When when the wind speed uses goes against the wind curtain which the blowing installment ties, is apart from the ground 1 meter wind speed to have to be bigger than 3m/s; When double side-blown installs, when single Taiwan movement, the entry middle position survey wind speed must be bigger than 3m/s, when the list side-blown installs, the wind speed when arrives another one side surface must be bigger than 3m/s;
②Suits the width to open wide the entry to want the entire journey to be effective the wind width to be bigger than 90%, is invalid the wind absolute width to have to be smaller than 100mm to be long.For example the entry width is 2m, the choice type: Air screen when leaves the wind for the entire journey the type, may choose two 0.9m long wind curtain or a 1.8m long wind curtain.The air screen is not the entire journey leaves when the air blower (e.g. throughflow air screen), must choose 1.2m+0.9m each one.Simultaneously ought to be able to satisfy the fast blast speed the request.
2. regarding food factory and the cafeteria and other pure places, air screen effective impediment mosquito musca's entry, is purely extremely important.
Its principle of work is, is opening wide the entry place must have the high air speed of flow, forms the partial high wind speed and the high pressure, the mosquito musca cannot enter.Its use main point also is two essential factors:
①The wind speed goes against when blows installs, is apart from ground 1m place to have to achieve 4m/s above the wind speed can prevent mosquito musca's entry effectively.When double side-blown installs, when single Taiwan movement, the entry middle position survey wind speed must be bigger than 4m/s, when the list side-blown installs, the wind speed when arrives another one side surface must be bigger than 4m/s;
②The great width opens wide the entry to want the entire journey slightly to be effective the wind width to be bigger than 100%.For example the entry width is 2m, the choice type: Air screen when leaves the wind for the entire journey the type, may choose 0.9m to add a 1.2m long wind curtain.The air screen is not the entire journey leaves time the air blower should better not have to select.Simultaneously ought to be able to satisfy the fast blast speed the request.
3. comfortable all operational sites all can have the personnel to work, therefore personnel's comfortable request is the work which must certainly consider key.When summer use, the air screen blows the natural wind, may adapt the human body comfortable demand, the wind speed which only is which the personnel is resident the place do not have to blow oversized.When winter use, the personnel exposed part has the natural wind to blow can have the cold wind feeling, although can prevent the cold wind similarly entry, but works as when air screen increase heating zone, can enhance the personnel passes when the comfort.Leaves the wind temperature to have to be suitable, personnel's head hand is felt when the comfort the main spot, the blast temperature arrives this region temperature for 40~50℃, is temperature which is suitable.Other only must seal a door to request is satisfiedly is suitable.
In brief, is selecting and purchasing wind curtain machine time, must act according to the geographical environment and the special use which locates chooses the suitable wind curtain machine.
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