| 摘要 |
The invention for recuperators: 1. 2. 5. is designed using iron tubes, without welding. The collectors 6 and the tubes 7 are welded at equal distance. The female threads 9, welded on each side of the collectors, are defined in the market as: ''normalised gas pitch''. These threads serve for connecting the recuperators with water circulation: - to the heating installation; - to that of the expansion valve. The air recuperator has the same characteristics as the water ones. The air intakes 9 are situated on either side of the lower portion of the apparatus. The hot air diffusion sheath II is on top of the air heat recuperator. The invention thus designed facilitates the manufacture of the apparatuses and their fixing into the chimneys which receive them. <IMAGE>
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