Head module for air compressor and air compressor including same

A head module for an air compressor, comprising:

• a crankshaft configured to receive power so as to rotate;
• a piston assembly comprising a connecting rod coupled to the crankshaft and a piston configured to reciprocate by the connecting rod;
• a crank body in which the crankshaft is accommodated;
• a cylinder assembly which is coupled to the crank body to communicate with the crank body and in which the piston is disposed;
• a valve unit accommodated in the cylinder assembly and configured to be opened and closed according to a reciprocating motion of the piston;
• a filtration filter coupled to the cylinder assembly and configured to filter air introduced into the cylinder assembly;
• and
• a cooling fan coupled to the crankshaft and disposed at an end of the crank body to rotate by the crankshaft so that unfiltered air is introduced into the crank body,
• wherein the crank body comprises:
• a first stroke space in which the crankshaft is accommodated, and the filtered air is introduced through the cylinder assembly;
• and
• a first heat dissipation space which is isolated from the first stroke space and into which the introduced unfiltered air flows through the cooling fan,
• wherein the cylinder assembly comprises:
• a second stroke space communicating with the first stroke space to accommodate the piston and the valve unit;
• and
• a second heat dissipation space which is isolated from the second stroke space to communicate with the first heat dissipation space and through which the unfiltered air passing through the first heat dissipation space flows to be discharged outside,
• wherein the crank body further comprises:
• a tubular inner case defining the first stroke space and having an inner communication hole through which the first stroke space and the second stroke space communicate with each other, wherein the inner communication hole is disposed on an outer surface of the tubular inner case;
• and
• a tubular outer case surrounding a circumference of the tubular inner case, defining the first heat dissipation space, and including a mount through which the first heat dissipation space and the second heat dissipation space communicate with each other and to which the cylinder assembly is coupled,
• wherein one end of the tubular outer case is closed by the tubular inner case, and the mount is disposed on an outer surface of the tubular outer case.