How to control temperature in the drying process?

In the production process of dried agricultural products, food and medicinal herbs, there is a seemingly simple factor that plays a decisive role in the quality of the finished product: drying temperature. A few small errors in temperature during the drying process can lead to serious consequences – from discoloration, loss of flavor, breakdown of product structure to reduction of inherent nutritional value.

So how to control the temperature in the drying process? The answer comes not only from operating experience, but more importantly from the support of modern drying equipment, especially the SUNSAY cold dryer – an advanced solution trusted in many factories, cooperatives and agricultural processing facilities across the country.

Temperature – The key to quality and consistency

Temperature in the drying process plays a particularly important role because it directly affects the sensory factors and intrinsic value of the product. At too high a temperature, fruits are prone to burning edges, discoloration, and loss of elasticity. With medicinal herbs, temperatures exceeding the threshold will evaporate valuable active ingredients, affecting their effectiveness and preservation ability. If the temperature is too low or unstable, the product will not reach the required dryness and will easily re-wet after packaging.

Therefore, temperature control in each drying stage – from start-up, maintenance to completion – is a vital factor. And this is not easy to do if using traditional dryers that are only controlled by mechanical relays or rudimentary sensors.

Why do many facilities still experience temperature deviations during drying?

In actual production, there are many reasons why temperature control does not achieve the desired results:

• The dryer does not have a precise control system and does not display the heat value in real time.
• The temperature in the drying chamber is unevenly distributed, due to one-way air flow or insufficient circulation.
• There is no sensing at multiple points, resulting in discrepancies between the set position and the actual temperature on the product tray.
• Without operating history, it is impossible to evaluate and optimize based on experience.

As a result, although the machine still operates normally, the output product is unstable – one batch is dry and crispy, another batch is moist or too hard, damaging the brand reputation and reducing competitiveness.

SUNSAY freeze dryer – precise temperature control to the degree

Understanding the importance of temperature control in the drying process, SUNSAY has developed a line of freeze dryers with an intelligent control system, helping to control temperature accurately, stably and flexibly according to each type of material.

Electronic control, flexible temperature setting

Food heat pump dryer uses a high-end digital controller (made in Korea), allowing users to set the drying temperature for each stage, cycle and type of material. This is extremely important in products such as strawberries, dried persimmons, artichokes, and cordyceps mushrooms – where each material requires a separate “heat formula” to ensure the best quality.

Temperature parameters are displayed in real time on the LCD screen, allowing the operator to monitor and adjust as needed.

Multi-point temperature sensor

One of the great advantages of the SUNSAY machine is the use of multi-point temperature sensors placed at many locations in the drying chamber, including points near the heat source, in the middle of the chamber and close to the air outlet. This helps to accurately measure the average temperature in the entire drying chamber, reducing the difference and preventing the phenomenon of “hot at the beginning – cold at the end” commonly found in one-way machines.

Thanks to this, the SUNSAY machine ensures that products on the top or bottom tray receive the same amount of heat, thereby achieving uniform quality.

Reverse air circulation system

To evenly distribute the temperature throughout the drying chamber, SUNSAY uses a 3D reverse wind system. Hot air or dry wind is introduced in multiple directions, circulating evenly between the trays, avoiding the phenomenon of “dead spots” – where the temperature does not spread, causing the product to dry unevenly.

This is the factor that helps the actual temperature in contact with the product to always be stable, completely different from machines that only use one-way fans.

Benefits of precise temperature control in drying

When temperature is well controlled, businesses can see a noticeable difference:

• Consistent product quality, no errors between batches, increasing brand reliability.
• Preserve nutrients, especially with high-value products such as ginseng, bird’s nest, and precious herbs.
• Optimize drying time, avoid drying for too long causing waste of energy, or drying not enough causing damage to the product.
• Increase the ability to vacuum pack and export, thanks to ensuring standard dryness and appearance.

Temperature control is more than just a technique – it’s the foundation for brand development

In an era where consumers increasingly pay attention to product quality, hygiene and sensory perception, good temperature control in the drying process is the foundation for building a reputable brand. With just a few degrees of deviation, businesses can lose a series of customers because the product does not meet requirements.

SUNSAY freeze dryer is the tool to eliminate that risk. Not only ensuring technical performance, SUNSAY also helps operators gain deeper understanding of the process, systematically control the entire drying process, from setting to checking results and saving batch data.

Temperature control in the drying process is not a technique reserved for experts, but an essential skill for anyone who wants to produce high-quality dried products. And to do it easily, accurately, sustainably – you need a device that is smart, stable and long-term companion.

SUNSAY freeze dryer is the optimal solution. With precise temperature control, multi-point sensors, reverse air flow and user-friendly operation system, SUNSAY helps you not only control temperature well, but also control quality, cost and production success.

Contact for quote and consultation

SUNSAY freeze dryer is a product researched and designed by engineers with more than 15 years of experience in Vietnam with the mission of improving the value of processing and preserving Vietnamese agricultural products as well as contributing to solving the problem of Post-processing accounting of Vietnam’s agricultural industry.

SUNSAY dryer offers a completely new solution that saves time, reduces investment costs for users, improves productivity, and brings high economic efficiency. With a reasonable price, SUNSAY Vietnam believes that this device is completely worth investing in and using for a long time to bring the most optimal results.

For detailed advice, please visit the website: kynghexanh.com.vn or immediately contact Hotline (Zalo): +84 935 995 035 or switchboard number: +84 94 110 8888 for support.

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