Laboratory oven type principle fault problem maintenance

Laboratory oven is one of the common equipment in the laboratory, which is widely used in chemistry, biology, medicine, food, material science and other fields. It is mainly used for heating, drying, curing and other treatments of samples to meet different experimental needs. The oven provides a stable temperature-controlled environment to ensure consistent sample handling conditions during the experiment, resulting in accurate and reliable experimental data.

Laboratory ovens play a vital role in scientific research and industrial production. In the field of scientific research, it helps researchers complete experiments such as drying, sterilization, and heat treatment of substances, and supports the accuracy and reproducibility of experimental data. In industry, ovens are used in mass production to ensure the quality and stability of products. Therefore, laboratory ovens are not only an important tool for scientific research, but also an indispensable equipment in all kinds of production lines.

Types of laboratory ovens

According to the different working principles and functions, laboratory ovens can be mainly divided into three types: ordinary ovens, Forced Air Drying Ovens and vacuum Drying Ovens.

Ordinary ovenIt is the most basic type of oven, which is usually heated by resistance wire and heated by natural convection. It is suitable for experiments that do not require high temperature and have no special requirements for material drying. The structure of ordinary ovens is simple and easy to use, but due to the lack of a circulating system of fans, there may be some unevenness in temperature distribution.

Blower Drying OvenThe built-in fan evenly circulates the hot air in the chamber, resulting in fast drying and temperature uniformity. This kind of oven is suitable for experiments that require higher temperature control accuracy and faster drying speed, and is widely used in chemical analysis, material testing and other fields. Through the action of the fan, the moisture and volatile substances on the surface of the material can be carried away more quickly, thus improving the drying efficiency.

Vacuum Drying OvenThe air in the box is pumped out by the Vacuum Pump, so that the box reaches a low-pressure environment, so as to reduce the boiling point of the moisture and solvent in the material, so that it can be separated from the surface of the material at a lower temperature. Vacuum Drying Ovens are suitable for materials that are sensitive to temperature or are prone to oxidation, and can avoid chemical reactions or physical deformation caused by high temperatures. It is often used in pharmaceutical, food, chemical and other industries, especially for the drying needs of delicate samples.

How the oven works

The working principle of the oven mainly relies on the heat energy conversion of the heating elements, as well as the different ways of air circulation to achieve drying. The principle of electric heating is a common way, usually using resistance wires or electric heating tubes to convert electrical energy into heat energy, by conducting the air inside the heating oven. When the air is heated, it transfers heat to the material inside the oven, helping it evaporate the moisture. The temperature of the heating element can usually be adjusted as needed to control the temperature inside the oven.

In some ovens, especially Forced Air Drying Ovens, circulating fans play a vital role. The fan circulates the air forcedly so that the hot air is evenly distributed in the oven. This air circulation avoids temperature inhomogeneity and ensures that all parts of the material are heated evenly. At the same time, the fan also helps to carry away the water vapor evaporated from the surface of the material, thus speeding up the drying process. The use of circulating fans significantly improves the drying efficiency and temperature control accuracy of the oven.

The drying principle in vacuum relies on a low-pressure environment to speed up the drying process of the material. When the air in the oven is pumped away by the Vacuum Pump, the air pressure in the oven drops to below the atmospheric pressure, so that the boiling point of the moisture and solvent in the material is reduced. In this low temperature environment, the moisture of the material can evaporate quickly at a lower temperature, thus avoiding the chemical reactions or physical changes that can occur at high temperatures. Vacuum drying is suitable for the drying of temperature-sensitive or oxidized substances, such as pharmaceuticals, food and precision instruments.

Precautions for use

Placement requirements

• Laboratory ovens should be placed in a well-ventilated, dry environment away from moisture or extreme temperatures.

• The oven should be placed on a stable table or ground to ensure the stability of the equipment and avoid affecting the normal operation of the oven due to vibration or tilting.

• Keep at least 30 cm of space around the oven to ensure air circulation and even heat distribution.

Inspection and maintenance before and after use

• Before use, check whether the power cord, plug and socket are in good condition, make sure the grounding wire is normal, and prevent leakage or short circuit.

• Regularly check whether the heating elements, temperature control system and fans of the oven are working properly to avoid equipment failure affecting the experimental results.

• After use, clean up the residue in the oven in time to avoid the accumulation of dust and debris, which will affect the performance and hygiene of the equipment.

It is forbidden to put flammable and explosive materials

• It is strictly forbidden to put flammable, explosive and volatile items into the oven for drying to prevent fire or explosion accidents.

• For materials with special chemical properties, the appropriate type of oven (such as vacuum Drying Oven) should be selected and used in strict accordance with the operating procedures.

Common problems and troubleshooting

Common causes and solutions for oven not heating

A treatment method with unstable temperature control

Routine maintenance and upkeep

In short, as an indispensable equipment in laboratory and industrial production, the performance and service life of laboratory ovens are closely related to daily maintenance and maintenance. Regular cleaning, inspection, and timely replacement of consumable parts ensure proper operation and temperature uniformity of the equipment, thereby improving the accuracy and efficiency of the experiment. Following the correct use and maintenance methods can not only prolong the service life of the oven, but also reduce the probability of failure and ensure the safety and stability of the experimental process. Regular commissioning and calibration work is also key to ensuring the accuracy and performance of the oven. Therefore, scientific maintenance is not only a necessary means to ensure the performance of equipment, but also an important guarantee to improve the quality of laboratory work.