Heat recovery unit

PROBLEM TO BE SOLVED: To provide a thermal regeneration unit which can be reduced in size and weight. SOLUTION: The thermal regeneration unit comprises an outer housing 2 and a thermal regeneration cell 1 having two separate air passages 11, 12 opening through the faces 13, 15, 16, 18 of the cell. The upstream side faces 13, 15 of one passage are contiguous, respectively, to the downstream side faces 16, 18 of the other passage and inclining by 90 deg. against these faces 16, 18. Turrets 33, 35, 36, 38 located above respective inlets 1, 2 and outlets 3, 4 of the housing 2 are turnable about the axis thereof and provided, respectively, with an angled coupling 43 turnable about the axis of the turret at a specified angle. The turrets 33, 35 on the upstream side of the inlet contain filters 133, 135, respectively, and the turrets 36, 38 on the downstream side of the outlet contain centrifugal fans 136, 138, respectively.