Abstract: With the increasing demand for energy conservation, environmental protection, comfort and health in society, the fixed operation mode of traditional air conditioning is no longer able to meet the personalized needs of users. Infrared human sensing technology provides an effective solution for the intelligent and energy-saving control of air conditioning by detecting the presence, location, movement, and quantity of indoor human bodies. Firstly, elaborates on the basic principles of infrared human sensing technology, and then studies the relationship between the installation position and detection range of infrared human sensing devices on air conditioners to determine the installation angle of infrared human sensing devices. Secondly, in order to verify the detection range and sensitivity of the human sensing device, an operation plan and detection plan for the infrared human sensing device were designed. Finally, through experimental verification, when the human sensing device is designed at a 40° angle between the middle position and the horizontal direction of the air conditioner, it can achieve effective range detection of 0.5 m to 5 m in front and back, and -50° to 50° left and right for people in different postures such as standing, sitting, and lying, ensuring the detection range and sensitivity of the air conditioner’s infrared human sensing.

Key words: Infrared human detection, Energy saving, Intelligence, Detection