Backpack-type assembly

A backpack-type assembly comprising:

• a body;
• and
• a base member, wherein
• the body comprises:
• a body casing;
• and
• a cooling fan attached to the body casing,
• the body casing includes:
• a body passage defined inside the body casing and extending from the cooling fan;
• a first communication hole disposed on the body passage;
• and
• a second communication hole disposed on the body passage,
• the base member comprises:
• a back plate attached to the body;
• and
• a harness attached to the back plate and configured to be worn on a user,
• the harness comprises:
• at least one shoulder belt comprising a shoulder air passage, communicating with the first communication hole, defined therein and configured to be worn on a shoulder of the user,
• a waist belt comprising a waist air passage, communicating with the second communication hole, defined therein and configured to be worn on a waist of the user;
• a shoulder cooling port disposed on the at least one shoulder belt and communicating the shoulder air passage to outside the at least one shoulder belt;
• and
• a waist cooling port disposed on the waist belt and communicating the waist air passage to outside the waist belt,
• the cooling fan is configured to circulate cooling air into or out of the base member through the shoulder cooling port and the waist cooling port,
• the body casing further includes:
• a front surface facing a back of the user when the user wears the harness;
• and
• a side surface perpendicular to the front surface, and
• the cooling fan is attached to the side surface of the body casing.