Cold room air curtain with door switch sensor
It creates a powerful, high-velocity air barrier at doorways to lock in cold air, block warm humid air, dust, and insects, while the integrated door switch sensor enables fully automatic operation: activates instantly when the door opens, shuts off reliably when closed. No manual control is needed, reducing energy waste and extending service life.
Built with a robust, corrosion-resistant casing and high-efficiency motor, it runs quietly and stably in low-temperature, high-humidity environments. Easy to install and compatible with standard cold room doors, it maintains consistent internal temperatures, lowers refrigeration load, cuts operating costs, and preserves the quality of stored goods.
Ideal for food cold chain, pharmaceuticals, logistics, and commercial cold rooms seeking smart, maintenance-free climate separation.
Intelligent Door Switch Sensor Control
The product is equipped with a dedicated door switch sensor that enables fully automatic operation without manual intervention. When the cold room door opens, the sensor sends a signal to start the air curtain immediately, creating a strong air barrier across the doorway. When the door closes, the unit stops running automatically after a short delay to maintain barrier stability and save energy. This synchronized control ensures the air curtain operates only when necessary, avoiding unnecessary power consumption and extending service life. The sensor supports both magnetic and mechanical connection types, adapting to different cold room door structures such as sliding doors, swing doors and rapid roller doors. It features quick response, stable signal transmission and strong anti interference ability, working reliably in low temperature and high humidity environments. Users can also set delay time and airflow speed according to actual usage scenarios, making the
High Efficiency Air Barrier Performance
The air curtain adopts an optimized airflow design and high performance fan system to generate a uniform, high speed air curtain that covers the entire doorway. This invisible air barrier effectively blocks the exchange of cold air inside and warm humid air outside, greatly reducing cold air loss and temperature fluctuations in the cold room. It can prevent up to 80 percent of thermal exchange at the doorway, helping maintain stable internal temperature and humidity. Stable temperature control protects stored goods such as food, medicine, chemical materials and electronic products from quality damage caused by temperature changes. The air barrier also blocks dust, smoke, odor and flying insects from entering the cold room, improving cleanliness and meeting hygiene standards for food storage and processing. Even in high traffic conditions with frequent door opening and closing, the air curtain maintains continuous and effective barrier performance, ensuring stable operation of the cold storage system.
Energy Saving and Low Operating Cost
Energy efficiency is a major advantage of this product. The automatic door switch control avoids long time unnecessary operation, directly cutting power consumption. It is equipped with high efficiency energy saving motors that convert more electrical energy into airflow power with lower heat generation. Compared with traditional air curtains, it reduces energy use by 30 to 50 percent while maintaining the same barrier effect. By reducing cold air leakage, the load on the cold room refrigeration system is significantly lowered, so compressors and cooling units run less frequently and have a longer service life. Lower refrigeration load means less electricity cost and less frequent maintenance, bringing long term economic benefits. In actual use, most customers recover the investment cost through energy savings within one to two years. The product also supports multi level speed adjustment, allowing users to choose low speed for light traffic and high speed for heavy traffic, further optimizing energy use.
· PrFood processing workshops
· Cold stores and freezer rooms
· Cold chain logistics centres and distribution warehouses
· Pharmaceutical factories and cleanrooms
· Biological laboratories and sample repositories
· Flower preservation chambers
· Low-temperature storage for
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Product Name |
Cold room air curtain with door switch sensor |
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| Shell Material |
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| Suitable Door Height |
2.0m - 2.5m |
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| Available Widths |
900mm / 1200mm / 1500mm (Customizable) |
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| Motor Type | Pure Copper Core, Low Temp Lubrication | ||
| Voltage/Frequency | 220V / 50Hz (Single Phase) | ||
| Power Input | 160W - 230W (Depending on width) | ||
| Air Velocity |
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| Air Volume |
1200 - 1900 m³/h |
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| Noise Level |
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| IP Rating |
IP44 |
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| Control Method |
Mechanical Button / Optional Door Switch |
Frequently Asked Questions (FAQ)
1. What is the main purpose of a cold storage air curtain?
Its primary function is to create an invisible air barrier that prevents cold air from escaping and warm air from entering when the cold room door is open. This maintains the internal temperature and reduces the load on your cooling compressor.
2. Do air curtains actually cool the room?
No. An air curtain is not an air conditioner. It does not generate cold air. Instead, it acts as a "seal" or a "door" made of air to keep the existing cold air inside the room.
3. Can an air curtain replace a physical door?
No. Air curtains are designed to work when the physical door is open (during loading/unloading). When the facility is closed for the night, the physical insulated door should still be closed for maximum security and insulation.
4. Why is an air curtain better than PVC strip curtains?
Air curtains offer a touchless solution, meaning no physical barrier touches your food or goods (better hygiene). They also don't scratch or fog up like PVC strips (better safety/visibility) and don't require frequent replacement due to wear and tear.
5. How much energy can I save?
While results vary based on usage and temperature differences, a properly installed air curtain can retain 80-90% of the conditioned air, potentially reducing your energy costs by 30-50% compared to an unprotected open door.
6. Does it prevent insects and dust?
Yes. The high-velocity airflow (usually above 15 m/s for industrial units) is strong enough to physically repel flying insects (flies, mosquitoes) and airborne dust, keeping your cold storage hygienic.
7. Should I install the air curtain inside or outside the cold room?
For the best results, we recommend installing the unit on the "warm side" (outside the cold room/freezer), blowing air downwards. This prevents the motor from freezing and stops warm air before it even enters the doorway.
8. Can I install the air curtain vertically?
Yes. If you lack headroom above the door, you can install units vertically on the sides of the door. For very wide doors, we recommend installing vertical units on both sides to create a meeting airflow in the center.
9. What is the ideal installation height?
It depends on the model. Commercial units are usually effective up to 2.5 - 3.0 meters. Heavy-duty industrial units can seal doors up to 5.0 - 6.0 meters high. Always check the "Effective Discharge Distance" in the specs.
10. Do I need a door switch?
We highly recommend it. A mechanical or magnetic door switch turns the air curtain on only when the door opens and turns it off when the door closes. This saves electricity and extends the motor's lifespan.
11. My door is wider than the largest air curtain. What should I do?
You can modularly install multiple units side-by-side. For example, if your door is 2.4 meters wide, you can install two 1.2-meter units together to cover the full width.
12. Will the motor freeze if I install it inside a freezer?
Standard motors will freeze. If you must install it inside (on the cold side), you need to order our specialized Cold Room Motor, which features low-temperature grease (-40°C) and anti-freeze cabling.
13. What is the difference between Single Phase and 3-Phase?
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Single Phase (220V/50Hz): Used for smaller commercial units (cafes, restaurants, small walk-ins). Easier to wire.
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3-Phase (380V-415V): Required for large industrial units. It provides the power needed for high-velocity centrifugal fans to blow air down from 4+ meters.
14. Are these units waterproof?
Our Cold Storage series comes with IP54 protection or higher. This means the motor and electrical components are protected against splashing water and dust, which is essential for humid or wash-down environments.
15. What material is the casing made of?
For cold storage and food processing, we strictly recommend 304 Stainless Steel. It is rust-proof, easy to clean, and complies with food safety standards. Powder-coated steel is available for general warehousing.
16. How loud are these units?
Industrial air curtains move a lot of air, so they are louder than residential AC units. Expect noise levels between 55dB (small units) to 75dB (large industrial units). This is standard for warehouse environments.
17. Why is there mist or fog at the doorway?
This happens when warm, humid air meets cold air. If your air curtain is not powerful enough or angled incorrectly, the seal is broken, causing condensation (mist). Ensure your unit has high enough velocity to reach the floor.
18. Why is ice building up on the floor near the door?
This usually means the air curtain is either too weak (air not reaching the floor) or the vanes are angled inward, blowing warm air into the freezer which then condenses and freezes. Adjust the air vanes to blow slightly outward (away from the cold room).
19. How often should I maintain the air curtain?
Maintenance is low. We recommend:
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Monthly: Check the intake grille for dust/debris blockage.
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Quarterly: Wipe down the stainless steel shell.
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Yearly: Check the fan blades and motor mounting for tightness.
20. Can I adjust the wind speed?
Yes. Most of our models come with at least 2 speeds (High/Low). Use High speed during hot summers or heavy traffic, and Low speed during cooler months to save energy.
21. What happens if the air curtain is narrower than the door?
If the unit is narrower than the door, air will leak in through the gaps at the edges. This "leakage" significantly reduces efficiency. Always choose a unit equal to or wider than your door opening.
22. Does the product come with a warranty?
Yes, all our industrial cold storage air curtains come with a standard 1-Year Warranty on the motor and electrical components. Extended warranties are available for project orders.
