| 摘要 |
A switchgear cabinet 10 has a cooling device 12 which forms a closed internal cooling circuit not in direct fluid communication with an associated external cooling circuit. The cooling device 12 is mounted in or on a side face 16 of the switchgear cabinet and is connected to the cabinet's interior by means of an air inlet 18 and an exhaust opening 20. The cooling device includes a receiving chamber 22 in which at least one internal heat exchanger 24 is accommodated. The receiving chamber has a fan arrangement 28a, 28b to circulate cooling air in the interior of the cabinet. The internal heat exchanger 24 transfers the heat removed from the air flow from the interior space of the switchgear cabinet to a closed internal cooling circuit (30, fig 2), on which cooling circuit there is disposed at least one heat transferring unit (32, fig 2) which removes heat from the internal cooling circuit 30 and transfers it to an external cooling circuit 34.The external cooling circuit is therefore not in fluid communication with the internal circuit, allowing the circuits to be disconnected from each other. |
