Micro gas pumps are small, compact devices designed for low flow rates and typically used in applications such as medical devices, portable air compressors, automotive applications, and small-scale compressed air systems. There are several types of micro gas pumps, each with its own design and working principle. Here are some common types:

 

1. **Diaphragm Pumps**:

   - These pumps use a flexible diaphragm to compress the gas. The diaphragm moves back and forth, creating a vacuum on one side and pressure on the other, which moves the gas through the pump.

   - They are known for being quiet, efficient, and having a long service life.

 

2. **Membrane Pumps**:

   - Similar to diaphragm pumps, membrane pumps use a flexible membrane to move the gas. They are often used in applications where high vacuum or pressure is required.

   - They can handle a wide range of fluids and are suitable for applications that require pulsation-free flow.

 

3. **Roller Vane Pumps**:

   - Roller vane pumps have a set of vanes that roll around the inside of a rotor. As the rotor turns, the vanes trap and compress the gas, moving it through the pump.

   - They are known for their ability to handle high vacuum and are suitable for both gas and liquid applications.

 

4. **Gear Pumps**:

   - Gear pumps use interlocking gears to move the gas. As the gears turn, they scoop up the gas on one side and push it out on the other.

   - They are reliable, efficient, and can handle high-pressure applications.

 

5. **Diaphragm Vane Pumps**:

   - These pumps combine the diaphragm action with a vane design. They use a diaphragm to create a vacuum and vanes to compress the gas.

   - They are suitable for both vacuum and pressure applications and can handle a variety of gases.

 

6. **Scroll Pumps**:

   - Scroll pumps use two spiral-shaped scrolls that move in opposite directions within a housing. The scrolls create an expanding and contracting cavity that moves the gas.

   - They are known for their high efficiency, low noise, and ability to handle a wide range of viscosities.

 

7. **Piezoelectric Pumps**:

   - Piezoelectric pumps use the property of certain materials to change shape when an electric voltage is applied. This piezoelectric effect is used to create a pumping action.

   - They are extremely small, efficient, and suitable for applications where space is limited and low flow rates are required.

 

8. **Peristaltic Pumps**:

   - While not as commonly used for gas as for liquids, peristaltic pumps can be adapted for gas applications. They use a rotating roller to compress a flexible tube, creating a peristaltic action that moves the gas through the tube.

 

Each type of micro gas pump has its own advantages and is chosen based on the specific requirements of the application, such as flow rate, pressure, viscosity, and the type of gas being handled.