| 摘要 |
The invention relates to an economising device for heating boilers which have burners for hydrocarbons. According to the invention, the device includes an air pump or air compressor (3) which supplies a control valve (5) with air, a flexible tube (7) which takes the air stream controlled by this valve (5) to a water container (2), where it bubbles in, and a further flexible tube (10) which receives the air stream which has been enriched with moisture within the container and supplies it to the main flexible tube with combustion air of a burner for hydrocarbons. <IMAGE>
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