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What is a Drying Oven?

The drying oven refers to a device used to dehydrate and dry sample or heat samples. It is a commonly used equipment, which can not only be used for drying samples, but provide the temperature environment required by experiments. It is widely applied in a great variety of fields, such as electronic components drying, industry and agriculture, medical and health, colleges and universities, scientific research institutes and laboratories.


Drying Oven

How Many Types of Drying Ovens are There?

Types of Drying Ovens

There are various drying ovens. In terms of their performance, the drying ovens can be classified into the vacuum drying ovens, blast drying ovens, programmable drying ovens, explosion-proof drying ovens and hot air circulating drying ovens. Our company mainly deals in vacuum drying ovens and blast drying ovens, which will be introduced in detail as follows.

Whether vacuum drying ovens or blast drying ovens, both of them can be used for experiments of materials drying and play an important role in biochemistry, chemical, pharmaceutical, medical and health, agricultural scientific research, environmental protection and other research and application fields.

But they have completely different working principles.

How does a Vacuum Drying Oven Work?

The vacuum drying ovens make use of the principle of vacuum pumping to dry materials. Specifically speaking, it can make the space, where the material is, be under the negative pressure or vacuum condition. Under such circumstances, the boiling points of moisture, solvents or other volatile components will decrease so that they can be separated from the surface of the material particles and pumped away by the vacuum pump.

How does a Blast Drying Oven Work?

The blast drying ovens take advantage of the blast circulation in the box to drive air flows in order to achieve the purpose of drying. By extension, it can heat the moisture, solvents and volatile components to make the molecules move rapidly so that they can be separated from the material and the material can be dried. It has a fast drying speed and high drying temperature. Under the action of the fan, the volatile particles of the material evaporated from the material surface can be quickly taken away through the air exchange so as to achieve the purpose of drying materials rapidly.

Vacuum Drying Oven VS. Blast Drying Oven

Vacuum Drying Oven VS. Blast Drying Oven

Different Drying Modes

1. Vacuum drying oven: it drys materials by using a vacuum pump to   vacuumize the system.

2. Blast drying oven: it drys materials by direct heating and utilizing a air blower to circulate the air in the box.

Different Working Principles

1. Vacuum drying oven: Under vacuum or low pressure, the boiling points of moisture, solvent and other volatile components in the material will become lower so that they can be separated from the material particle surface and be removed by a vacuum pump at a relative low temperature. It is mainly applicable for materials that will oxidize, polymerize or have other chemical reactions at high temperature. Furthermore, it can heat to accelerate the volatilization of moisture, solvent and volatile components so as to separate from the material surface.

2. Blast drying oven: a electric blast drying oven works by heating moisture, solvent or volatile components to make their molecular move rapidly to separate from the material. This drying mode has a high temperature and rapid speed. Under the action of draught fan, the molecular escaped from the material surface can be removed by the air exchange so that samples can be dried quickly.

How to Choose a Proper Drying Oven between Them?

The vacuum condition of a vacuum drying oven greatly reduces the boiling point of liquid that is required to be removed. Thus, it is suitable for rapid and efficient drying of heat-sensitive, easily decomposed, easily oxidized materials and complex components. It can not only lower drying temperature, but prevent some materials from oxidizing in contact with air. The vacuum drying oven can efficiently cut down the drying time for samples that are not easy to dry, such as powder or granular sample. Furthermore, various complex mechanical components or other porous samples can adopts the vacuum drying method after cleaning, without leaving any substance. You can choose a vacuum drying oven if your samples belong to the above. For other ordinary samples, you can choose an electric blast drying oven.

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