SHANDONG DELIN

Swirl diffuser


Swirl diffuser
+
  • Swirl diffuser

Product Details

Product Introduction:
Our company’s swirl diffusers are specialized air‑handling terminal units designed for high‑ceiling spaces and large temperature‑difference supply applications. Their key feature is a set of adjustable guide vanes that induce rotational motion in the supplied airflow, generating a high‑velocity swirling jet. This design delivers long throw distances and high induction ratios, enabling rapid mixing with indoor air and ensuring uniform air distribution in large spaces. They are widely used in airport terminals, sports arenas, large industrial facilities, shopping mall atriums, and similar venues.

General technical parameters (using a mainstream aluminum alloy swirl diffuser as an example):

Parameter Item

Specification Details

Product Name

Swirl diffuser (adjustable swirl supply air outlet)

Nominal diameter

Common specifications: φ200mm~φ630mm (customizable non-standard diameters available)

Material Configuration

Standard configuration: aluminum alloy profiles (with electrostatic powder coating); optional: ABS plastic

Leaf form

Multi‑blade adjustable guide vanes, manually operable. / Electrically adjustable air supply angle

Air supply distance

10–30 m (varies with random diameter and supply air velocity)

Applicable wind speed

Recommended supply air velocity: 3~8 m/s

Applicable airflow volume

500–10,000 m³/h (random type with variable diameter)

Installation method

Ceiling-mounted recessed installation, flanged connection for round ductwork.

Control method

Standard configuration includes manual adjustment; electric actuators are available as an option ( DC 24 V / AC 220 V) Remote adjustment

Applicable medium

Air-conditioning supply air and fresh air, medium temperature - 10℃~+60℃

Work environment

-10℃ to +60℃, relative humidity ≤95% (no condensation)

Applicable Scenarios and Selection Recommendations:
Core use cases:
1. Air conditioning supply air for large-scale public buildings such as airport terminals, railway stations, sports stadiums, and exhibition halls.
2. Air supply and ventilation for large industrial buildings and warehouses
3. Air supply from terminal units in shopping mall atriums and double-height lobbies
4. Uniform air distribution system for theaters, auditoriums, and large conference rooms
Key considerations for selection:
1. Select the diffuser based on duct size and airflow rate: Prioritize diffuser sizes that match the duct’s internal diameter, and calculate the supply air velocity according to the design airflow volume. It is recommended to keep the air velocity within the range of 3–8 m/s to minimize noise and excessive pressure loss.
2. Select based on airflow requirements: For applications requiring manual adjustment of the airflow angle, choose a manually adjustable model; for high‑ceiling spaces or scenarios where seasonal mode switching is needed, we recommend models with electrically adjustable settings, enabling remote control of the airflow direction.
3. Select based on installation height: The higher the ceiling, the more you should choose a model with a larger diameter and greater airflow range to ensure that the air reaches the areas where people are active.
4. Material and Appearance Selection: In humid, dust‑prone environments, aluminum alloy is the preferred choice; for applications with high aesthetic requirements, consider a powder‑coated finish that matches the ceiling color.


Keywords:

Quote Inquiry

Please fill in your Contact information and your requirements; we will arrange for a professional to contact you!

  • How many products do you need?
  • What more information do you need to know?
Submit

Cross-flow air curtain machine


The cross‑flow air curtain employs a large‑diameter, slender cross‑flow impeller—also known as a tangential fan—directly driven by a single‑phase motor to generate a wide, planar, high‑velocity airflow. It is installed above or on the side of doorways. The unit features a flat, rectangular profile with a much reduced depth compared to centrifugal models, allowing it to seamlessly integrate into various ceiling designs. It is particularly well suited for spaces with limited headroom and where aesthetics and quiet operation are paramount, such as shopping malls, supermarkets, restaurants, office buildings, banks, hospitals, and residential garages.

Cooling coil


Our company’s surface-type coolers are among the core heat-exchange devices in air-conditioning and ventilation systems. They are primarily used to cool and dehumidify air, and can also be switched to hot-water or steam mode during winter to provide air heating. By utilizing a refrigerant (such as chilled water, refrigerant, or brine) or a heat-transfer medium (such as hot water or steam) flowing inside the tubes, these units facilitate forced‑convection heat exchange with the air flowing outside the tubes, thereby regulating air temperature and humidity. As the central heat-exchange components of chiller units, fresh-air handling units, fan coil units, and other equipment, they offer high heat-exchange efficiency, flexible installation, and broad compatibility.

Fresh air ventilator


The ceiling‑mounted fresh air ventilator (ceiling‑type air handling unit) is a central air‑conditioning terminal unit that integrates fresh air exchange, air temperature and humidity control, air filtration and purification, and energy recovery. The unit features a concealed ceiling‑mount installation, suspended within the building’s suspended ceiling. It utilizes chilled water or hot water piping to provide cooling and heating, while simultaneously exhausting indoor stale air and supplying filtered outdoor fresh air. This system not only enhances indoor air quality in enclosed spaces but also regulates air temperature through heat‑exchanger coils, offering both ventilation and central air‑conditioning functions. It delivers energy savings, minimizes floor space occupation, and is widely suited for integration into fresh air systems in commercial, industrial, and large public buildings.

Q-type steam heater


Our company’s Q‑type air heater is an industrial‑grade, forced‑convection heating unit that uses water or steam as the heat transfer medium. It is specifically designed for large‑space applications such as factory and mine workshops, warehouses, large buildings, and drying rooms. The equipment consists of a fan, an electric motor, and a steel finned‑tube radiator integrated into a single unit. Performance tests have demonstrated its stable and reliable operation. By combining “steam heat exchange with forced air supply,” it rapidly heats the air, delivering highly efficient heating and making it one of the mainstream solutions for heating high‑ceiling spaces.