A vacuum pump is a device widely used in manufacturing, chemical industry, electronics, medical, aerospace and other fields. It can pump gas from a closed container to achieve a certain degree of vacuum. Vacuum pumps can be divided into many types according to different working principles and application scenarios. This article will introduce the types, uses and selection methods of vacuum pumps.

1. Types of vacuum pumps

● 1. Mechanical pump

Mechanical pump is a common vacuum pump that compresses and discharges gas through mechanical motion to form a vacuum. Mechanical pumps are suitable for pumping air in the medium to low vacuum range, and are usually used in processes such as vacuum drying and vacuum packaging.

● 2. Diffusion pump

A diffusion pump is a high vacuum pump that spreads gas molecules outward through diffusion to form a vacuum. Diffusion pumps are suitable for pumping air in high vacuum ranges and are usually used in semiconductor, optics, aerospace and other fields.

● 3. Molecular pump

A molecular pump is an ultra-high vacuum pump that expels gas molecules from a container through molecular collision and rebound, thereby forming an extremely high degree of vacuum. Molecular pumps are suitable for pumping air in the ultra-high vacuum range and are usually used in scientific research, semiconductor manufacturing and other fields.

● 4. Rhizome pump

The rhizome pump is a positive displacement vacuum pump that compresses and discharges gas through the rotating rhizome to form a vacuum. The rhizome pump is suitable for pumping air in the medium vacuum range and is usually used in vacuum furnaces, vacuum cooling and other processes.

● 5. Ion pump

An ion pump is a high vacuum pump that ionizes gas molecules through an electric field and then expels the ions out of the container, creating a vacuum. Ion pumps are suitable for pumping air in high vacuum ranges and are usually used in semiconductor, optics, aerospace and other fields.

2. Purpose of vacuum pump

Vacuum pumps are widely used in manufacturing, chemical industry, electronics, medical, aerospace and other fields. For example:

● 1. Vacuum drying: Place wet items in a vacuum chamber, and use a vacuum pump to extract the moisture to achieve drying purposes.

● 2. Vacuum packaging: Put food and other items into a vacuum bag, and use a vacuum pump to extract the oxygen from it, thereby extending the shelf life of the food.

● 3. Vacuum furnace: Place items in a vacuum chamber and use a vacuum pump to extract the gas inside to achieve high temperature treatment.

● 4. Semiconductor manufacturing: During the semiconductor manufacturing process, the gas in the manufacturing equipment needs to be extracted to ensure the purity of the manufacturing process.

3. Selection of vacuum pump

There are many factors to consider when selecting a vacuum pump, including the required vacuum degree, pump pumping speed, pump material, pump sealing performance, pump noise, etc. Generally speaking, choosing a suitable vacuum pump requires comprehensive consideration based on specific application scenarios and requirements. For example, for applications that require high vacuum, you can choose a diffusion pump or an ion pump; for applications that require medium to low vacuum, you can choose a mechanical pump or a rhizome pump.

In short, the vacuum pump is a very important industrial equipment and has a wide range of applications in various fields. Choosing the right vacuum pump can improve work efficiency and reduce costs, thereby bringing greater benefits to the enterprise.