How a Spiral Freezer Keeps Air Moving Across Every Tier
A spiral conveyor creates a compact, continuous product path. Its air system must distribute cooled air across the product stack, return it to the evaporator and limit routes that bypass the food.
Follow the airflow through the equipment
Remove heat from the return air
The evaporator transfers heat from circulating air into the refrigeration system. The fan supplies air motion rather than refrigeration capacity.
Distribute the supply
The illustrated side plenum provides a supply path over the stack height. Horizontal flow then crosses the open spaces between product tiers.
Limit bypass
Baffles and suitable enclosure details restrict easy shortcuts around the product. They help the intended path compete with other available routes.
Maintain circulation during operation
Product loading and evaporator frost alter resistance. Air balance and defrost operation must preserve the required product exposure.
What the fan contributes
- Circulates air between the evaporator and product stack.
- Provides pressure rise for coil, plenum and product-path resistance.
- Supports the specified distribution as loading and frost conditions change.
What interrupts the intended process
- A large unsealed gap allows air to bypass the product.
- Uneven or oversized loading restricts some layer passages.
- Frost-loaded coil passages reduce airflow or upset its distribution.
Prepare the operating conditions
Share your layout and the operating information below. If a value is still unknown, identify it so the next measurement can be agreed before a model is selected.
Match the fan to this air path
LONGWELL axial and centrifugal families provide candidate routes for a circulation-fan evaluation. Match the actual duty and arrangement, then qualify the offered model for freezer temperature, moisture, cleaning and installation. The product image shows family identity only and is not a freezer-approved model selection.
Where it sits
In the evaporator-to-plenum circulation path serving the spiral tiers.
Why consider this configuration
An axial family can be evaluated for circulation when its curve covers coil and tier resistance; freezer qualification is not established.
Check performance in the assembled equipment
Match the fan to the product air path
Share the freezer arrangement, tier loading and environmental duty with LONGWELL for a fan-family evaluation.
Start with your layout and the requirements you already know. Confirm the selected configuration in the complete equipment.