How to Adjust the Freezing Parameters in a Tunnel Freezer?

In the food processing industry, the Tunnel Freezer is a key piece of equipment for quickly freezing seafood, meat, poultry, fruits, vegetables, and baked goods. To achieve ideal freezing results, product quality, and energy efficiency, it is crucial to properly adjust the parameters of the tunnel freezer.

This article will explain how to scientifically adjust the freezing parameters of a tunnel freezer from a practical production perspective to ensure more stable and efficient operation of the equipment and improve the final product quality.

Adjusting Freezing Temperature

The freezing temperature is one of the most important settings in the tunnel freezer, as it affects the cooling speed and freezing results of the products. A properly set temperature not only ensures faster freezing but also reduces energy consumption.

The freezing temperature of the tunnel freezer is typically adjusted through the control panel, where operators can set the target temperature based on production requirements. Generally, the storage temperature is set around -38°C (±3°C), but it should be adjusted according to the type, size, and production requirements of the product to ensure optimal quick freezing results.

Adjusting Belt Speed

Belt speed determines the residence time of the product in the tunnel, which is a key factor affecting whether the product is "frozen through."

The belt speed of the tunnel freezer can be adjusted through the control panel to meet the processing needs of different products. If it is found that the product is not fully frozen, the belt speed can be reduced to allow the product to stay longer in the tunnel, ensuring that it freezes all the way through. For larger or thicker products, it is also recommended to reduce the belt speed to improve the uniformity of freezing.

• Quick freezing: Suitable for high-productivity applications. The conveyor belt speed should be moderate to ensure food passes through the freezing zone quickly and reaches the required freezing temperature.

• Large food items: Require longer freezing times. The conveyor belt speed can be appropriately slowed down to increase the freezing time and ensure thorough freezing.

Important Considerations When Using a Tunnel Freezer

In actual production, in addition to correctly setting the temperature and belt speed, attention should be given to the following points to ensure stable operation of the equipment and consistent freezing results of the products:

1.Ensure Even Product Placement

Products should be placed evenly on the conveyor belt to avoid stacking, as this could affect freezing uniformity.

2.Regularly Check the Evaporator and Fans

If the evaporator has thick frost or the fans are iced up, it will affect heat exchange efficiency. Regular cleaning and defrosting should be carried out based on usage.

3.Minimize Door Openings

During production, avoid frequently opening the equipment doors to prevent cold air loss and temperature fluctuations.

4.Monitor the Refrigeration System’s Operating Condition

After long periods of operation, check the pressure, temperature, and other operational parameters of the refrigeration system to ensure that it is functioning properly.

Good operating habits not only improve product freezing quality but also extend the life of the tunnel freezer and reduce maintenance costs.

The tunnel freezer is a critical piece of equipment for modern food processing enterprises to enhance production capacity and product quality. By properly setting the freezing temperature, adjusting the belt speed, and maintaining good usage and maintenance practices, companies can achieve more stable freezing results, reduce energy consumption, and minimize the risk of equipment failures. If you have any questions regarding the selection or use of tunnel freezers, feel free to contact us, and Sure International will provide you with professional technical support and solutions.