Multi-valve

A multi-valve comprising:

• a valve housing having a plurality of ports including first ports disposed along a first column and second ports disposed along a second column of the valve housing;
• and
• a valve rotor disposed inside the valve housing and configured to be rotatable according to an air-conditioning mode, the valve rotor having a plurality of communication flow paths each configured to connect one port of the plurality of ports to one or more other ports thereof,
• wherein the valve rotor includes an outer cylinder and an inner cylinder spaced apart from the outer cylinder by a predetermined distance and disposed inside the outer cylinder, and
• wherein each of the plurality of communication flow paths is configured as an outer flow path in a surface portion of the outer cylinder or as an inner flow path in a space between the outer cylinder and the inner cylinder.