Archive for the ‘Air Curtains’ category

Pest Insects Control Air Curtains

June 12th, 2014

Air curtain is a device that is used for cooling, drying and cleaning within various manufacturing lines and other processes. By using compressed air as their power source, a balanced sheet of airflow stretches across the full length of the Air Curtain. The Air Curtain is used extensively in many industrial as well as commercial application areas to keep dust, contamination or even flying insects/pests out by creating forceful turbulence.

Pest/insect control Air Curtains, sometimes called “Fly Fans” are used in

Food processing plants
Dairies and bakeries
Bottling plants
Restaurants and school cafeterias
Supermarkets
Hospitals and Pharma industries

And other areas where the control of flying insects is required. The powerful stream of air that is produced by Air Curtain/Fly Fan is an excellent deterrent to insects. Sanitation maintenance applications require these Air curtains/Fly fans that prevent airborne insects from entering. For fly and insect control, the Air curtain projects the high velocity air jets across the opening, deflecting and prohibiting the entrance on unsanitary insects, thereby maintaining sanitary conditions. The Air Curtain is equally effective either mounted horizontally or vertically.

For the pest/insect control the Air Curtains can be mounted on either inside or outside of the doorways. It is very important that the entire doorway be covered so that there are no gaps for the insects/pests to enter.

Inside of the doorway; inside mounted unit helps to control the building’s climate in the winter by stopping the influx of cold outside air and preventing airborne insects.
Outside of the doorway; when the building contains odors which are attractive to flying insects it is recommended that the Air curtain be mounted on the outside.

The most effective Air Curtain design for insect control has a nozzle that can angle the air stream away from the area to be protected. An angle of about 20 degree from the vertical is usually optimal.

For this application i.e. Pest/insect control which requires maximum protection, it is common and widely accepted to use a more powerful Air curtain in order to achieve the necessary level of protection.

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Industrial Climate Control Air Curtain

May 14th, 2014

An Air Curtain is a continuous broad stream of air circulated across a doorway serving a conditioned space. Air curtains are normally mounted horizontally over the door. They can also be mounted vertically at the side of the door or under the floor directed upwards

Air curtains are the best device to control the indoor climate in all the places where the doors cannot always be closed. The main purpose of Air Curtain is to disallow the influx of outside air through opening. Opening where an Air Curtain would typically be used are exterior shipping and receiving doors to plants and warehouses and interior doors between plant areas of different temperatures. These are used not only to prevent cold air from pushing its way in, but also prevent warm air from going outside the door.

In order to control climate an Air Curtain emits an air stream with enough 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.

To prevent the entry of outside winds the discharge nozzle is angled outward so that the air leaving it meets the wind trying to enter. The wind meet/strike the Air curtain stream in the doorway. Working principle is shown in the figure below;

When the vector representing the air stream and the vector representing the wind equalize they form a resultant which should meet the floor in the door plane for maximum efficiency.

The doors on industrial buildings are often open for long periods of time and can be extremely wide, in the case of warehouse doors. With people and delivery vehicles needing access, closing these doors to maintain the internal atmosphere is impractical. An industrial Air Curtain mounted above or to the side of these entrances will create a more comfortable and safer working environment.

For areas that are temperature controlled, Air Curtains act as an invisible barrier sealing in the chilled or heated air, providing unhindered access for staff and removing the inconvenience of fast-acting shutter doors or plastic slats.

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Antique Furniture Protection; Air Curtain and Dehumidifiers

April 9th, 2014

It is important to cure and reserve our antique properties or furniture’s, it should be considered that antique furniture should not be cared or repaired in the same manner as modern home furnishing. There are many factors such as UV light, sunlight, hot air, relative humidity, moisture and insects/pests that affect the Antique Furniture.

Factors affecting the antique furniture/material

Ultraviolet light; causes damages to antiques.
Sun light; can degrade early finishes, wood and fabrics for antique furniture.
Relative Humidity; changes in the relative humidity can cause wood to expand and contract, it can cause glue joints to loosen, drawers and doors to drag or become stuck in their opening. And this extended period of high humidity can lead to mold growth, rot and insect infestation.
Hot Air; heat can cause shrinking that can loosen glue joints, veneers, inlays and marquetry.
Insects and Pests; wood, leather, fabrics and upholstery materials such as horsehair can be inviting to insects to insects and other small pests.

Air Curtains are aerodynamically designed air blowers generating a laminar stream of air. Air Curtain creates an uniform invisible barrier of high velocity air to divide different environments or clean, cool or dry various components.

The powerful stream of air that is produced by Air Curtain/Fly Fan is an excellent deterrent to insects. Sanitation maintenance applications require these Air curtains/Fly fans that prevent airborne insects from entering. For fly and insect control, the Air curtain projects the high velocity air jets across the opening, deflecting and prohibiting the entrance on unsanitary insects, thereby maintaining sanitary conditions.

Air curtains are the best device to control the indoor climate in all the places .These are used not only to prevent cold air from pushing its way in, but also prevent warm air from going outside the door.

Dehumidifiers are used to control the level of humidity in the antique furniture environment which is used for the storage and to prevent the growth of mold and fungus on the Antique furniture. Mold only requires a bit of moisture to grow, and it can set up shop at a place as soon as one of its airborne spores finds a hospitably damp surface. Dehumidifier also eliminates condensation and subsequent corrosion.

Some other methods which are used for Antique Furniture care

Avoid placing Antique Furniture in front of a window or direct sunlight.
Avoid placing Antiques near air conditioning and heating vents.
Do not place Antique Furniture near fireplaces and stoves.
Blot up spills immediately.
Dust regularly using a lint free cloth.