The development history of mini convection heaters dates back to the early 20th century when electric heaters first became popular. However, the mini convection heater as we know it today has evolved over time through advances in technology and materials.

In the 1920s, electric heaters were bulky and often unreliable, with a tendency to overheat and cause fires. It wasn't until the 1930s that the first ceramic heaters were introduced, which were safer and more efficient than earlier models.

In the 1950s, the first oil-filled radiators were developed, which provided a more even heat and could be left on for longer periods without overheating. However, they were still relatively large and cumbersome.

In the 1980s, the first mini convection heaters were introduced, which were small, portable, and efficient. They used a convection heating element to warm the air and distribute it evenly throughout a room. These heaters were often used as supplemental heating sources or for heating small spaces such as bedrooms or offices.

In recent years, mini convection heaters have continued to evolve with the introduction of new materials and technologies. For example, some models now use infrared heating elements, which are more energy-efficient and provide a more focused heat source.

Overall, the development history of mini convection heaters reflects a constant drive to make them smaller, more efficient, and safer.