Abstract: With the continuous upgrading of air conditioning usage requirements, heating function for domestic air conditioning is more and more widespread. Starting from the change of heating parameters of domestic air-conditioning products and the ways to solve the problems of many pain points when heating is used. Based on the product information, patent datum of the domestic air-conditioning, the research trend of heating technology for domestic air conditioning is discussed. Provide technical reference for the research and development of domestic air-conditioning products. Analysis of data indicates that, energy conservation technique in heating and defrosting control are still the main directions of technical research. Foot warming is an ideal heating method for the human body, will inevitably become a major selling point of products in the future. Humidification technology can solve the pain point of dryness in air conditioning heating, will also be recognized by users.

Key words: Domestic air-conditioning, Heat technology, Patent, Development trend