China air curtains manufacturer

As a non-recirculating air curtains is put into operation, air is brought into the unit through the intake, enters the fan housing, and is accelerated by the fan. This fast moving air goes into a plenum, which allows for an even distribution of air along the full length of the discharge nozzle. Aerofoil shaped vanes in the nozzle create a uniform air stream with a minimum of turbulence. The air discharged through the nozzle creates a jet stream to the floorn and creates an invisible door.

Commercial Environmental Application
Commercial air curtains are becoming widely used in building entrances to reduce energy consumption and provide comfort. In the winter, they retain warm inside air and prevent the influx of cold air.Commercial air curtains can also supply additional heat in the door area using optional electric, steam, or hot water heaters. In the summer, air doors keep hot humid air out and prevent the escape of air conditioning. The working principle of Commercial Entrance air doors is to provide the most effective air screen possible without blowing so hard that it is objectionable to people passing through.

Commercial air curtains are ideal for application on high-traffic doorways in commercial establishments such as stores, restaurants, and banks, and in public buildings such as hospitals, terminals, and schools. In many cases, where a vestibule was installed or planned to reduce the inflow of outside air, an air door is a better approach. This is particularly true for high-traffic entrances where both doors are frequently open at the same time, defeating the purpose of the vestibule. A continuously operating air curtains allows the vestibule to be dispensed with, resulting in large savings-both in initial cost and operating cost-and increasing the usable floor area.

In addition to providing comfort through the elimination of cold drafts and the addition of heat to door areas, Commercial air curtains have many other benefits. For example, they can decrease door maintenance costs since doors need to be opened and closed less often. In restaurants, they stop uncomfortable cold drafts at customers’ feet. Many schools purchase air curtains to save energy and find that as an additional benefit they keep floors dry and safe and hallways warm during winter months. In buildings with high ceilings, the air curtains recirculates the warm stratified air that rises to the ceiling.

, Commercial air curtains are quiet and compact and pay for themselves in a very short time. Most units may be used all year round, and are adjustable for seasonal conditions using a multi-speed motor.

Industrial Environmental Application
The primary purpose of the industrial air curtains is to prevent the influx of outside air through an opening into a heated or cooled area. Openings where an air curtains would typically be used are exterior shipping and receiving doors to plants and warehouses, and interior doors between plant areas of different temperatures.

Several engineering research studies done in various parts of the world have demonstrated the capabilities of air curtains to stop drafts. The findings of theses studies are similar, and are perhaps best summarized in the work done at the University of Illinois by Dr. Stoecker and Dr. Hayes and published in the ASHRAE Transaction 1969, Volume 75, Part 2. Based on the results of this study, VAC International and some other air curtains manufacturers publish ratings on their air curtains ’ abilities to stop drafts. The VAC International ratings have been verified by actual field test installations on door openings to pressurized rooms in which the pressure has been uniform and measurable.

To control climate, an air curtains emits an air stream with enough velocity to meet the floor, creating an air seal in the door area. The strength of this seal is controlled by both velocity at the nozzle and the width of the nozzle. For different door sizes and different wind conditions, different air velocities at the nozzle are required.

Air curtains are cost effective when installed on any door that is in use over 10% of the day. The fuel savings payback is tremendous if the door is open a complete working day. In addition to saving energy, air curtains provide faster traffic flow and lessen the maintenance costs for doors that formerly were being opened and closed many times a day. Calculate your energy savings >

Negative Pressure
Negative pressure in a building can be caused by the exhausting of air due to production requirements, the use of plant air for combustion, or the chimney effect in extremely high ceilings or multi-story buildings. In some large buildings where the negative pressure is not too great, it can be equalized through openings in other parts of the building. However, in most cases the negative pressure will cause a draft through the doorway which prevents the effective operations of an air curtains, and must be rectified. One way to do this is by providing make-up air to the building. An air curtain which takes in outside air, rather than plant air, can be used to supply make-up air. During periods when the door is closed the air curtains takes in outside air, heats it when necessary using a direct-fired gas heater or a steam heater, and discharges it to the inside through the nozzle. When the door is open, the air curtains continues to provide heated make-up air while simultaneously preventing the entry of cold outside air.

For single-story buildings, negative pressure can be alleviated using louvers at a level above the work area. Another option is to move the air curtains away from the doorway and allow the air to go up over the top of the unit. Side shields, the height of the door and the width of the air door, have to be located between the wall and the backside of the air curtains . It is also recommended to deflect the air above the air door towards the ceiling, to prevent the outside air from being drawn into the air door inlet.

*FUNCTION OF COMPENSATION OF AIR CONDITIONING
The prevention of the cool (hot) air current and the saving of the electricity.
The constant formations of the air curtain is able to effectively prevent the leakage of cool (hot) air in order to maintain the constant temperature in room. It thoroughly improves the long time operation of air-conditioned and working environment by circulating and regulating its temperature to achieve the saving of energy.
*EFFICIENCY IN DUSTPROOF PRACTICE.
High efficiency in wind volume's design and effective withstanding against the intrusion of dusts from the out side, protection of clothes, decorations, stationery, and the operational area of computers and supermarket etc. from the deposits of dusts.
*EFFECTS IN PREVENTION OF SMOKES AND ODOR.
The fan blades are design in the horizontal air current type to fully develop the rotating type of wind volume to reach every corner of the area. It strongly prevents and insulates against the spread of oily smell and smoke from kitchen, and the industrial waste vapor and exhausts of automobile motorcycle will not come into the room with it.
*EFFECT IN DRIVING INSECTS OFF
The strong and forceful wind pressure interrupts the penetration of the mosquitoes and insects. The food processing factory, large kitchen, restaurant and dinning hall shall be safe against those vermin.