Vacuum pre-cooling machine for fruits and vegetables：The technological tool for preserving the freshness of fruits and vegetables

In the field of modern agricultural logistics and food processing, the freshness and quality of fruits and vegetables are of utmost importance. As consumers' demands for food quality and taste continue to rise, vacuum pre-cooling machines for fruits and vegetables have emerged and have become a crucial equipment for ensuring the quality of fruits and vegetables and extending their shelf life.

What is a fruit and vegetable vacuum pre-cooling machine?

The fruit and vegetable vacuum pre-cooling machine, also known as a vacuum machine, is a pre-cooling device that uses vacuum technology to evaporate moisture, thereby cooling the items and preventing the loss of moisture and nutritional value. It is suitable for products with strong vitality such as fruits, vegetables, and flowers. It can significantly reduce the temperature in the cold chain, inhibit the growth and reproduction of bacteria, extend the shelf life of the goods, and reduce transportation losses.

The principle of the fruit and vegetable vacuum pre-cooling machine

The fruit and vegetable vacuum pre-cooling machine utilizes the vacuum stripping effect and heating evaporation effect to transfer water from the interior of the ingredients to the surface. Then, it forms vapor in the vacuum environment and removes the moisture, thereby rapidly cooling the ingredients. Under vacuum conditions, the moisture inside the food can evaporate rapidly, with its evaporation rate being several times or even ten times faster than that under normal pressure. The high-power vacuum pump rapidly reduces the pressure in the processing chamber to below 5 mbar, enabling faster evaporation of the moisture. At the same time, after extracting oxygen and air components, it promotes the sublimation of moisture, accelerating the evaporation process, and the high-temperature heating also causes the moisture to volatilize more rapidly from the food.

The advantages of the fruit and vegetable vacuum pre-cooling machine

Maintain product quality

It can quickly cool down the products from the high-temperature state after harvesting or processing, preventing the loss of heat and moisture, and ensuring that the taste and quality of the products remain unaffected. For example, vegetables that have been pre-cooled using a vacuum cooling machine remain exactly as they were when they were collected until they reach the end customers, without spoiling, getting old, or becoming overcooked.

Extend the shelf life of goods

In a vacuum environment, the metabolism of items will slow down, and the growth rates of bacteria and organisms will also be inhibited. This significantly extends the shelf life of the items. The vacuum pre-cooling technology can also suppress the metabolic activities of fruits and vegetables and the growth of microorganisms, thereby reducing the respiratory intensity and consumption of the fruits and vegetables, achieving the purpose of preservation.

Increase the added value of agricultural products

The vacuum pre-cooling machine effectively controls the quality of agricultural products. While enhancing the competitiveness of agricultural products, it also significantly increases their added value. Compared with those that have not undergone pre-cooling, the fruits and vegetables transported and stored after pre-cooling have better freshness and taste, and higher market prices, which is conducive to sales.

Save time and cost

The vacuum pre-cooling machine can quickly reduce the temperature of fruits and vegetables to a suitable level for storage. The pre-cooling time is extremely short, thus saving time costs. With the vacuum pre-cooling machine, the harvested vegetables can be vacuumed for half an hour and then shipped.