Backpack working machine

A backpack working machine configured to eject liquid, the backpack working machine comprising:

• a body unit;
• and
• a shoulder harness unit attached to the body unit and configured to be worn on shoulders of a user,
• wherein
• the body unit comprises:
• a battery unit comprising a battery attaching part to which a battery is attached;
• a fan unit comprising a fan configured to operate on electrical power of the battery;
• a liquid tank configured to store the liquid;
• and
• a control unit comprising a control board configured to control rotation of the fan,
• when the backpack working machine is placed on a placement surface, a direction perpendicular to the placement surface is defined as an up-down direction,
• when the backpack working machine placed on the placement surface is viewed from above, an entirety of the battery unit and an entirety of the fan unit overlap the liquid tank,
• when the backpack working machine placed on the placement surface is viewed from above, 50% or more of the battery unit overlaps the fan unit and 50% or more of the fan unit overlaps the battery unit,
• the battery unit is disposed above the fan unit,
• the liquid tank is disposed above the battery unit, and
• the control unit is disposed above the fan unit,
• the fan unit comprises a tubular member which houses the fan and inside which air delivered flowed by the fan flows,
• an opening is defined in an upper portion of the tubular member, and
• the control unit closes the opening of the tubular member.