Fruit and vegetable vacuum pre cooler

A vacuum pre cooling machine for fruits and vegetables is a device used to reduce the temperature of fruits and vegetables and extend their shelf life. Its main function is to quickly cool fruits and vegetables from a high temperature environment to a suitable storage temperature, thereby reducing the loss of fruits and vegetables during transportation and storage.

1、 Working principle

The working principle of a vacuum pre cooler for fruits and vegetables is to use the reduced solubility of gas in a vacuum state to rapidly evaporate the water in the fruits and vegetables, taking away the heat from them and achieving the purpose of cooling. The specific steps are as follows:

1. Fruits and vegetables are pre treated to remove surface dirt and moisture, and then placed in a pre cooling chamber.

2. Vacuumize the pre cooling chamber to reduce air pressure, and the moisture in fruits and vegetables begins to evaporate.

3. The water vapor generated by evaporation is absorbed by the coolant, which takes away the heat from the fruits and vegetables, causing a decrease in their temperature.

4. When the temperature of fruits and vegetables drops to the appropriate storage temperature, air is filled into the pre cooling chamber, the vacuum state is released, and the fruits and vegetables are discharged from the pre cooling chamber.

2、 Process flow

1. Pre processing of fruits and vegetables: including cleaning, peeling, cutting, and boxing, for subsequent pre cooling and storage.

2. Pre cooling chamber vacuum extraction: Extract the air from the pre cooling chamber to create a vacuum state.

3. Coolant circulation: The coolant passes through the pre cooling chamber, absorbs the evaporated water vapor in the fruits and vegetables, and takes away the heat in the fruits and vegetables.

4. Cooling of fruits and vegetables: Fruits and vegetables rapidly evaporate water in a vacuum state, causing the temperature of the fruits and vegetables to drop rapidly.

5. Air filling: When the temperature of fruits and vegetables drops to the appropriate storage temperature, air is filled into the pre cooling chamber to release the vacuum state, and the fruits and vegetables are discharged from the pre cooling chamber.

3、 Application Fields

Vacuum pre cooling machines for fruits and vegetables are widely used in fields such as fruit and vegetable processing, refrigeration, and transportation. They can effectively extend the shelf life of fruits and vegetables, improve their quality and economic value.

4、 Parameters

1. Vacuum degree: The vacuum degree of the fruit and vegetable vacuum pre cooler is usually 0.01~0.03MPa, which can effectively reduce the evaporation rate of water in fruits and vegetables.

2. Coolant: Commonly used coolants include water, ethylene glycol, acetone, etc. When selecting a coolant, its safety and cooling effect on fruits and vegetables need to be considered.

3. Pre cooling time: The pre cooling time of a vacuum pre cooling machine for fruits and vegetables is usually 1-4 hours, and the specific time needs to be determined based on factors such as the type, weight, and temperature of the fruits and vegetables.

4. Temperature range: The vacuum pre cooling machine for fruits and vegetables can achieve a temperature range of 20~0 ℃, which can meet the pre cooling needs of different types of fruits and vegetables.

In summary, the vacuum pre cooling machine for fruits and vegetables reduces the solubility of gases under vacuum, causing the water in fruits and vegetables to evaporate rapidly and take away the heat from them, thus achieving the purpose of cooling. It is widely used in the fields of fruit and vegetable processing, refrigeration, transportation, etc., which can effectively extend the shelf life of fruits and vegetables, improve their quality and economic value.

The working principle of a vacuum pre cooler for fruits and vegetables is to use the reduced solubility of gas in a vacuum state to rapidly evaporate the water in the fruits and vegetables, taking away the heat from them and achieving the purpose of cooling. The specific steps are as follows:

1. Fruits and vegetables are pre treated to remove surface dirt and moisture, and then placed in a pre cooling chamber.

2. Vacuumize the pre cooling chamber to reduce air pressure, and the moisture in fruits and vegetables begins to evaporate.

3. The water vapor generated by evaporation is absorbed by the coolant, which takes away the heat from the fruits and vegetables, causing a decrease in their temperature.

4. When the temperature of fruits and vegetables drops to the appropriate storage temperature, air is filled into the pre cooling chamber, the vacuum state is released, and the fruits and vegetables are discharged from the pre cooling chamber.

Application fields:Vacuum pre cooling machines for fruits and vegetables are widely used in fields such as fruit and vegetable processing, refrigeration, and transportation. They can effectively extend the shelf life of fruits and vegetables, improve their quality and economic value.

1. Vacuum degree: The vacuum degree of the fruit and vegetable vacuum pre cooler is usually 0.01~0.03MPa, which can effectively reduce the evaporation rate of water in fruits and vegetables.

2. Coolant: Commonly used coolants include water, ethylene glycol, acetone, etc. When selecting a coolant, its safety and cooling effect on fruits and vegetables need to be considered.

3. Pre cooling time: The pre cooling time of a vacuum pre cooling machine for fruits and vegetables is usually 1-4 hours, and the specific time needs to be determined based on factors such as the type, weight, and temperature of the fruits and vegetables.

4. Temperature range: The vacuum pre cooling machine for fruits and vegetables can achieve a temperature range of 20~0 ℃, which can meet the pre cooling needs of different types of fruits and vegetables.