| 摘要 |
<p>A compressed air supply unit (1), wherein a piston pump assembly (2) for producing compressed air has a drive motor (10) and a cooling assembly (15); and the cooling assembly (15) has a hydraulic circuit (16), along which water is circulated by a first pump (21); the hydraulic circuit (16) having a heat exchanger (28), a number of work branches (22, 23, 24) parallel to one another upstream from the heat exchanger (28) and intersecting respective separate parts of the pump assembly (2), and an auxiliary branch (29) which bypasses the first pump (21) and has a second pump (30) for circulating water, when necessary, along the work branches (22, 23, 24) when the first pump (21) is idle.</p> |
