Air heater

The utility model discloses an air heater, which comprises a cavity which the casings are surrounded to form, wherein the casing is equipped with an air inlet and an air outlet, a fan and an infrared heating pipe are arranged in the cavity. As the improvement, one or a plurality of tubular wind pipes whose position is vertical to both the air inlet and the air outlet are arranged in the cavity, the infrared heating pipe is arranged in the tubular wind pipe, both ends of the tubular wind pipe are respectively communicated with the air inlet and the air outlet. An air strainer is best arranged on the place which the air inlet is disposed at. The above structure achieves the goals of comfortable utilization and electricity saving of the heater. The utility model has the advantages of simple structure, small volume, low fabrication cost and safe and convenient utilization.