Cooling mechanism

A cooling mechanism for cooling an object, comprising:

• a duct that leads a fluid for cooling;
• multiple fans that are placed in the duct and send the fluid for cooling;
• and
• a bypass channel that detours at least one of the multiple fans, wherein:
• the duct is a first duct;
• the cooling mechanism further comprising a plurality of second ducts provided inside the first duct and the multiple fans wherein
• the second ducts are aligned coaxially,
• a first fan of one of the multiple fans provided outside the second ducts in the first duct;
• and
• a second fan of one of the multiple fans provided to each one of the second ducts,
• the bypass channel includes space outside the second duct and inside the first duct;
• and
• the cooling mechanism discharges the fluid for cooling supplied from an inlet side of the first duct via the bypass channel, wherein:
• the first duct includes a first space and a second space connected to the first space by an opening;
• the first space includes the first fan;
• the second space includes the second ducts;
• the first space is provided on the inlet side of the second space or the outlet side of the second space;
• the cooling mechanism includes a gap between the first space and at least one of the second fans;
• and
• the fluid for cooling is flowable into or out of the bypass channel via the gap.