The most professional heat pump dryer for the agriculture processing industry

Heat pump dryer for the agriculture (Refrigeration dryer)- is the next technology after heat drying technology in the field of agriculture and food processing.

Refrigeration drying technology overcomes the limitations that heat-drying technology can’t solve. It can dry many types of materials at low temperatures and doesn’t allow outside contaminated air to affect the dried products as well.

Let’s learn about the outstanding features of the heat pump dryer for the agriculture in the article below.

Heat pump dryer for the agriculture – SUNSAY Refrigeration Machine

SUNSAY Refrigeration Machine is researched and designed by Vietnamese engineers, suitable for agricultural and seafood products. SUNSAY launches many lines of Refrigeration dryers that meet all business models.

How many types of refrigeration dryers are there?

Conventional refrigeration dryers have 2 types: residential refrigeration dryers and industrial refrigeration dryers.

• Start-up scale often uses residential refrigeration dryers, mini refrigeration dryers, this type of dryer is usually capable of drying from 10 to 200 kg/batch.
• Industrial scale is often used in production facilities that already have stable output and large output. Capacity from 300Kg to 5 tons for 1 machine.

In the food industry, which refrigerator should I choose to ensure hygiene?

According to the standards of safety and hygiene in the food industry, the machines made of corrugated iron, steel or painted materials will be very dangerous because of the toxins in the material, easy to rust, difficult to clean and are place for bacteria to nest.

It is best to choose a dryer made entirely of high-grade 304 stainless steel used in food technology to be safe, ensuring the conditions and standards of the factory.

How does a cold dryer work?

Refrigeration dryer is also known as a heat pump dryer, this is a drying method by which the main agent is dry air at a temperature lower than normal drying temperature blowing into the drying chamber, removing water vapor to dry the product.

From the working principle diagram of the industrial refrigeration dryer that SUNSAY presented above, we can imagine the following:

– The industrial refrigeration dryer will be divided into two main parts: the control part and the drying chamber part.

– The control unit is composed of a heat pump, This heat pump has a hot end and a cold end. The hot end plays the role of providing heat for the drying agent, and the cold end is used to separate moisture for the drying air.

The working process of industrial refrigeration dryer takes place as follows:

– Hot and dry air is circulated through the trays of the product to be dried. At the end of this cycle the air temperature will drop and the humidity will increase. Then the air flow carrying the moisture of the dried food will be sucked through the condenser coil’s tube.

Here the air will be cooled down below the condensation point. The water vapor in the air is condensed, causing the air’s vapor content to decrease to zero.

– This cold dry air is directed through the hot chamber for heating. The air temperature gradually increases within the allowable range (30 ÷ 60) degrees Celsius. After that, they are led into the drying chamber containing the products.

– Under the difference in specific pressure of water vapor on the surface of the product with the specific pressure of water vapor in the air (drying agent), the water vapor in the product itself evaporates and dries the product.

– This process takes place continuously and closed cycle. Due to the low temperature of the drying environment, the highest is about (30 ÷ 60)0C, so the product quality is less affected.

The working principle of SUNSAY refrigeration dryer is as follows:

The refrigeration system is a closed operation cycle, the air is convection and recirculation thanks to the convection fan system, without exhausting the drying air.

The drying air from the drying chamber returns to the dehumidification cooling system. Here, the air is cooled to the dew point, the moisture in the air is separated out in the form of water. Water is collected and discharged through a separate water pipeline.

– After being dehumidified and dried, the air is re-heated to the set temperature to be dried and returned to the drying chamber.

– In the drying chamber, with the difference in humidity, the moisture on the product is absorbed by the dry air and dries the product.

– The air convection system of the SUNSAY refrigeration dryer is designed on a separate principle to ensure that the air is evenly distributed in all trays and on the product surface to help the product dry evenly and uniformly.

– Refrigeration dryer operates in a closed cycle, so the temperature and humidity outside the environment do not affect the work, and the drying time of fruits, agricultural products, and vegetables.
Refrigeration system is optimally designed to ensure the highest drying efficiency.

How long is the durability of a cold dryer usually used?

With SUNSAY refrigeration dryers, the service life is calculated in units of ten years. Production standards are on par with developed countries such as the US, Korea, Japan, etc. All components are used high-grade from reputable large industrial companies.

Mechanical materials and components have a long service life at the same time: The body of the refrigerator is made entirely of 100% high-grade SUS 304 (Inox 304) material, ensuring food safety and hygiene standards and for high durability. Does not rust during use like low-grade stainless steel or powder coated steel.

Door hinges use heavy-duty, sturdy ones that won’t warp the door during long-term use. Door lock with 2-layer handle adjusts stepless tightening to help the cabinet be closed and not open over time. The sealing ring is a 2-layer heat-resistant, specialized in the food industry, a specialized material in the food industry.

Environment subject to large temperature fluctuations. The assembled 304 stainless steel bolts firmly connect the parts together and make it easy to disassemble the parts when they need to be checked and repaired.

High-performance & durable refrigeration equipment from Europe: The refrigeration compressor plays the role of the heart of the humidification system because it is selected by Ambraco from Europe to ensure the best durability.

And the machine can work continuously 24/24 with high intensity and good dehumidification performance. Water is taken out through a separate pipeline system.

The cooling fan is specifically designed to be placed on the top of the oven, hidden by a 304 stainless steel mask. The fan power is always selected in excess to ensure that the hot gas is cooled to the correct specifications in all weather conditions.

The dehumidified indoor unit is designed in the form of a wave blade and high thickness to ensure that the humid air is reduced heat and condensate. This is the device that plays the role of retaining water during the drying process.

Smart & high-end electrical control equipment. The origin of the device is the first point to be taken care of. Electrical equipment used in SUNSAY refrigeration dryers comes from famous brands such as Schneider of Germany, Omron of Japan, FOX, LS & Hanyoung of Korea. Which devices ensure the system to operate stably and accurately.

What are the outstanding technical features of the control system of SUNSAY refrigeration dryer?

• The drying temperature control system by PID technology helps to stabilize the power source and automatically adjust the temperature error. This is a technology that uses an advanced SSR semiconductor relay controller in temperature control instead of using a conventional ON/OFF contactor.
• In versions controlled by PLC software, the drying equipment is programmed with the desired drying cycles and the system automatically adjusts for all drying batches without human intervention.
• With large capacity refrigeration systems, the central control system helps to connect to remote control, measure parameters and record them to export a report to evaluate the achieved drying efficiency.

Contact method to order dryer SUNSAY

In addition to refrigeration dryers, SUNSAY Vietnam also provides other types of dryers such as:  food drying machine, heat dryers, sublimation dryers,  and horizontal dryers,…

Please contact Hotline (Zalo): +84 935.995.035 or call center +84 941.108.888 or leave information in the form and we will contact you right away.

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