the vacuum principle of smoke exhaust pipe is based on the pressure difference and flow principle of gas. When the combustion equipment (such as stove, fireplace, etc.) produces smoke during combustion, the smoke exhaust pipe is responsible for guiding the smoke out of the combustion equipment.

The vacuum principle of the smoke exhaust pipe can be explained by the following steps:

1. The combustion equipment produces smoke: the fuel in the combustion equipment produces smoke, including combustion products (such as carbon dioxide, water vapor, etc.) and gases generated in the combustion process.

2. pressure difference caused by flue gas: because the internal temperature of combustion equipment is relatively high, the temperature of flue gas is relatively high, thus forming the temperature difference between flue gas and the surrounding environment. The temperature of the flue gas is higher than the surrounding air, so the buoyancy of upward movement is generated. This temperature difference leads to the pressure difference between the flue gas and the outside.

3. Natural rising and smoking effect: As one end of the smoke exhaust pipe is connected to the top of the combustion equipment, the smoke naturally rises and is discharged outside through the smoke exhaust pipe due to the buoyancy caused by the temperature difference. This process is called natural smoking effect, that is, a lower pressure area is formed in the exhaust pipe.

4. ventilation effect: when the flue gas flows from the combustion equipment to the exhaust pipe, the pressure difference generated by the flue gas urges the surrounding air to enter the combustion equipment to replace the exhausted flue gas. This phenomenon is called ventilation effect, which keeps the gas flow inside the exhaust pipe.

generally speaking, the vacuum principle of the smoke exhaust pipe is based on the temperature difference and pressure difference between the smoke and the surrounding environment. The flue gas generated by the combustion equipment moves upward due to the high temperature, and is discharged out of the room through the exhaust pipe, and at the same time, the surrounding air supplements into the equipment, forming a gas flow. This vacuum principle enables the smoke to be effectively discharged outside, ensuring the cleanliness and safety of the indoor environment.