How Does A Cooling Tunnel Work?

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Refrigeration and cooling tunnels are vital in the food industry. In fact, the cold chain begins at food processing companies to maintain the condition of products, slow bacterial growth and prevent spoilage. Cooling is an important process in the production of chocolate and chocolate products.

This necessitates the use of certain equipment including cooling and freezing tunnels. In general, the chocolate cooling tunnel is important in this industrial sector.

Therefore, getting a professionally made cooling tunnel from a renowned cooling tunnels manufacturer will help facilitate your production and improve the quality of your final products.

What exactly are cooling tunnels?

Cooling tunnel is a system used in food processing companies to cool bakery products, confectionery products, snacks and other items. They are structurally similar to convection air ovens, but dont provide heat.

Cooling tunnel is excellent cooling equipment for food processing and can also be used in other sectors of the food industry.

How does cooling tunnel function?

Cooling tunnels use blowers to introduce outside air or ambient air into the tunnel and then extract the hot air from the final product at the other end. The working theory is as same as air conditioner, just the power of cooling compressor is bigger than air conditioner. The cooling tunnel essentially provide controlled temperature reduction in a batch or continuous cycle system.

Cooling is the final stage in the chocolate production process before obtaining the final product. Therefore, this is a critical process due to the input and output of temperature. Temperature and time are two critical elements for high quality chocolate and chocolate products. For keeping the stability of cocoa butter crystals, the chocolates in cooling tunnel should be cooled by three temperature zones, which conform to the characteristics of cocoa butter crystals.

Moreover, the  cooling tunnel should be 8-12 minutes for products made by pure chocolate. Input temperatures that are too low can cause unwanted and unstable cocoa butter crystals. On the other hand, chocolate with surface temperature under atmospheric conditions before wrapping draws moisture in the form of condensation.

Maintaining cold and quality

The chocolate and other food manufacturers work hard to create and sustain a cold chain for their goods. Thus, the cooling tunnels have played an important role since the beginning of this process. The same products will be kept in warehouses and delivered to retail locations. All this helps to ensure that consumers consume a product that is both fresh and of high quality.

Features of cooling tunnel

1, Separated control of the cooling tunnel

Our cooling tunnel is composed of several units of cooling compressors. Then you can set different temperature in different sections of cooling tunnel. For example, at the beginning of cooling tunnel, the temperature should be a little bit higher, at the middle of cooling tunnel, should be low and the temperature in last sections should be close to room temperature.  

2, Maximum security

The machine has two emergency switches, one just at the inlet and another lies at the end of the cooling tunnel, in addition to the emergency shutdown on the central control system. If any of the emergency switches becomes activated, the cooling process and conveyor cease instantly.

3, Adjustable conveyor

The conveyor speed can be customized according to customers requirements. Generally, the  speed is around 2.5 to 4 meters per minute. The conveyor is powered by electricity and the deviation correction will work automatically.

4, Detachable top

The cover's top provides adequate insulation and is built for fine and indirect cooling.

Benefits of cooling tunnel

1. A strong cooling air circulation system within the tunnel

2. Dependability and ease of maintenance and service

3. The ability to regulate the temperature in different sections;

4. 304 SS material keeps the hygiene&food safety.

5. Energy-efficient design

Are you in need of a premium cooling tunnel?

Buying cooling tunnel from us with its unique features and benefits mentioned above will give you an assurance that you are getting the best cooling tunnel from a trusted manufacturer.

If you are interested in our products, please contact us for more details. We are always at your service to serve you better.


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