Heat exchange unit
AssigneeHeatex AB
InventorGustav NYMAN
Life of this patent
Estimating the term…
Abstract
A heat exchange unit (1) includes a heat exchange housing (3) and two heat exchange arrangements (4) located within the heat exchange housing (3). Each heat exchange arrangement (4) includes an outer (5a) and an inner (5b) air-to-air plate heat exchanger, which are connected in series. The heat exchange unit also relates to a totally enclosed electrical machine system with air to air cooling and a method for cooling the electrical machine system.
Claims13
A heat exchange unit (1) comprising a heat exchange housing (3), two heat exchange arrangements (4) arranged within said heat exchange housing (3), each heat exchange arrangement (4) comprising an outer (5a) and an inner (5b) air-to-air plate heat exchanger, said outer and inner heat exchangers (5a, 5b) being connected in series, and wherein air flow (6, 12) within each heat exchange arrangement (4) is deflected when flowing between said connected heat exchangers (5a, 5b).
A heat exchange unit (1) according claim. 24, wherein said heat exchange arrangements (4) are arranged within said heat exchange housing (3) such that said external air inlet side (17) of each outer heat exchanger (5a) is located at one end of said heat exchange housing (3), respectively, and said external air outlet side (18) of both inner heat exchangers (5b) is located at a center section of said heat exchange housing (3).
Method of cooling a totally enclosed electrical machine system comprising a heat exchange unit (1) and an electrical machine unit (2), wherein said heat exchange unit (1) comprises first and second heat exchange arrangements (4) and a heat exchange housing (3), and wherein said electrical machine unit (2) comprises an electrical machine (7) and an electrical machine housing (8),
- said method facilitating heat exchange in two simultaneous events between a first external air circuit (6) and a first internal air circuit (12) interacting across said first heat exchange arrangement (4), and a second external air circuit (6) and a second internal air circuit (12) interacting across said second heat exchange arrangement (4), without mixing the air of said air circuits (6, 12),
- each external air circuit (6) comprising the successive events of:
- external air entering an external air inlet (14) arranged at one end of said heat exchange unit (1), said external air flowing through said heat exchange arrangement (4), said external air exiting an external air outlet (15) arranged at a center top section of said heat exchange unit (1),
- each internal air circuit (12) comprising the successive events of:
- internal air flowing at least partially through said electrical machine unit (2), said internal air exiting said electrical machine unit (2) and entering an internal air inlet side (20) of one of said heat exchange arrangements (4), said internal air flowing through said heat exchange arrangements (4), said internal air exiting an internal air outlet side (19) of said heat exchange arrangement (4) and re-entering said electrical machine unit (2).
Dependencies are inferred from the claim text.