Microchannel heat exchanger module design to reduce water entrapment
a heat exchanger and microchannel technology, applied in indirect heat exchangers, refrigeration components, light and heating apparatus, etc., can solve the problems of bare coastal corrosion environments, atmospheric corrosion of outdoor microchannel heat exchangers, etc., and achieve the effect of reducing the amount of water retained
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embodiment 32
[0024]In FIG. 2, an embodiment 32 includes an inlet chamber 30 of an inlet / outlet manifold 180 at a vertically lower position leading to a heat exchange tube bank 40 passing refrigerant to a chamber 36 of an intermediate manifold 182. From the chamber 36, refrigerant passes through a heat exchange tube bank 42 to a chamber 31 of the inlet / outlet manifold 180, and back through yet another heat exchange tube bank 44 to another chamber 37 of the intermediate manifold 182. From the chamber 37, the refrigerant passes through a heat exchange tube bank 46 to an outlet chamber 33 of the inlet / outlet manifold 180. In the FIG. 2 embodiment, as opposed to the FIG. 1B prior art, the inlet chamber 30 is at a bottom section of the microchannel heat exchanger 32, providing a much hotter refrigerant to this section than would exist in the outlet chamber 33 at the heat exchanger exit.
[0025]By routing the hottest refrigerant into the inlet 30 positioned at the lower section of the microchannel heat e...
embodiment 60
[0026]FIG. 3 shows an embodiment 60 wherein the inlet refrigerant line 61 is also at the vertically lowermost portion leading into an inlet chamber 62 of an inlet / outlet manifold 190. From the inlet chamber 62, the refrigerant passes through a heat exchange tube bank 64 to a chamber 66 in an intermediate manifold 192, a heat exchange tube bank 68, the intermediate chamber 67 of the inlet / outlet manifold 190, and through a branch refrigerant line 70 to another intermediate chamber 72 of the same inlet / outlet manifold 190 not adjacent to the chamber 67, leading in turn to a heat exchange tube bank 73. From the heat exchange tube bank 73, the refrigerant passes through yet another intermediate chamber 74 of the intermediate manifold 192, the heat exchange tube bank 76, and to the outlet refrigerant line 78. Essentially, this embodiment provides hotter refrigerant at the bottom and top heat exchanger tube bank sections 64 and 73, which might be more exposed to the effects of corrosion t...
embodiment 80
[0027]FIG. 4 shows an embodiment 80 wherein the refrigerant inlet line 82 is located within the top section of the microchannel heat exchanger. Refrigerant flow control devices such as valves 84 and 86 selectively route refrigerant through a tap line 88 to an injection point 90. If the valve 86 is open and the valve 84 is closed, refrigerant will pass normally into an inlet chamber 92 of inlet / outlet manifold 200, a heat exchange tube bank 94, an intermediate chamber 96 of an intermediate manifold 202, back through a heat exchange tube bank 98 to an intermediate chamber 112 of the inlet / outlet manifold 200. From the intermediate chamber 112 refrigerant passes through a heat exchange tube bank 103 to a chamber 105 of the intermediate manifold 202, and a heat exchange tube bank 102. From the heat exchange tube bank 102, the refrigerant passes through an outlet chamber 110 of the inlet / outlet manifold 200 and to an outlet refrigerant line 108. This embodiment will operate as in the pri...
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