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How can we use the air curtain in the correct way?

Views: 0     Author: Site Editor     Publish Time: 2022-06-03      Origin: Site


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The air curtain machine is a temperature adjustment device and air purification equipment. It is usually installed at the entrance, or blown horizontally, or hung above the doorway, and blown downward.

  • How to set the wind speed of the air curtain?

  • How to measure the wind speed of the air curtain machine?

  • How to adjust the angle of the air curtain?

How to set the wind speed of the air curtain?

In 2013, it was mentioned in "Service Technician's Inspection and Identification Manual" written by WilliamH Robinson of the United States that "the wind speed of the air curtain must be greater than the normal flight speed of insects, that is, 6.7mph (3 m/s) for fruit flies and 9 mph (4 m/s) for house flies. seconds), bees 15.6 mph (7 m/s)."

Based on the flying ability of the flying insects mentioned above, we can know the types of flying insects we need to prevent based on risk analysis, and then we can know the wind speed setting requirements of the air curtain.

After years of observing the fly-killing lights at the entrance, we found that more than 95% of them are small flying insects smaller than the size of house flies. Therefore, there are also group food companies that stipulate the landing wind speed of the air curtain as 4.5m/ s, so that more cost-effective air curtains can meet the needs of insect control.

Here we want to emphasize the landing wind speed rather than the outlet wind speed. We must know that there is a difference between the wind speed at the outlet and the wind speed reaching the ground. Generally speaking, the wind speed is decreasing.

How to measure the wind speed of the air curtain machine?

To measure the wind speed, you can use a portable thermal bulb electric anemometer or a portable thermistor constant temperature anemometer. After checking the Internet, it is more convenient to buy a portable anemometer. Enterprises can choose products at different price points according to their own conditions.

Measured location:

In the case of top-mounted installation, it is the height where the flying insects may fly in. Therefore, to prevent the target flying insects from entering, the wind speed on the ground should prevail. In the case of side installation, the wind force at the midpoint of the gate shall prevail.

How to adjust the angle of the air curtain?

The angle of the air curtain can be affected by the environment, such as whether the indoor pressure is positive or negative. The editor thinks that 15-30° is acceptable, and it should be adjusted according to the actual effect.

In practical applications, when it is not convenient to measure the included angle of the wind direction, you can take a small piece of paper towel (about 2-5mm square). Place it in the palm of your hand, 25cm above the ground, directly under the air outlet, and blow out the scraps of paper towels.

Guangzhou Meihao HVAC Equipment Co. Ltd. always focuses on customers’ needs and therefore it will provide the best air curtains for all customers from all over the world. If you want to know more, please connect with us.

NO.C105 Yuewang building, NO.1 Wangling section of 106 national road, Baiyun district








  • Professional after service

    With more than 50 years’ experience, we provide professional shipping service and after sales service including: booking vessel, protecting exclusive agency, trouble shooting, helping client with sales(such as making catalog), and so on.
  • Full access to market all over the world

    Our products have certification of CE, CB, ISO 9001, UL, RoHS, etc. Since 1969, our products have been sold to countries all over the world.  
  • Full ability to design and manufacture air curtains

    Our factory has experienced R&D team and full equipment to design and manufacture air curtains. We have well integrated production line which includes Metal workshop; Plastic workshop; Blower workshop; Motor workshop and Assembly workshop. These workshops are equipped with the most advance equipment and machines in our industry (including the laser cutting machine and numerical controlled machines for various purposes. Also we put in loads of efforts to make sure our customers have unique, original design. To make sure our customers always have the leading edge products in the business.
  • High standard quality control

    Our air curtains are with ISO 9001 certifications.
  • High quality products

    Our standard models are made better than international standards. For example our motor is made and designed by our R&D team, with full copper wire and temperature rise lower than most of others. That means our motor has longer service life. With professional design and manufacturing, our product air performance is at least 20% better than most of others.
  • Most complete product range of air curtain

    Our factory was found on 1969, started to design and manufacture air curtain since 1982.Our first air curtain model Classic C2. We are now having more the 50 air curtain product series, include:
    Ambient air curtain; Heating air curtain (electric heating and hot/warm water heating air curtain); Horizontal mount air curtain; Vertical mount air curtain; Ceiling mount air curtain; Special air curtain series. Such as vehicle air curtain which installed on refrigeration truck, revolving door air curtain, cold room air curtain, etc. Product length from 0.6 meters to 2 meter, if there’s special needs we can provide customize service for other length. And the air curtain casing materials include steel, stainless steel, plastic, aluminum, etc. 

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