Compressor system, and puncture repair kit using same

A compressor system comprising:

• a motor,
• a piston driven by the motor through a crank mechanism,
• a cylinder having a cylinder main body forming a pump chamber housing the piston reciprocably from a lower dead point to a top dead point and compressing air between the piston and itself,
• a cylinder subpart forming a surge chamber for receiving the compressed air compressed in the pump chamber through an air release valve,
• an air intake valve having an air intake hole penetrating through the piston to take outside air into the pump chamber,
• a valving element formed from a leaf spring closing a pump chamber side of the air intake hole with its elasticity, and
• an air supplying passage for sending and supplying the compressed air from the surge chamber toward outside,
• wherein the diameter D of the air intake hole is 3 to 15 mm,
• wherein a maximum supply pressure PP is specified for the compressed air to be supplied and an atmospheric pressure is specified as P0
• wherein a pressure ratio P is defined as P0/(PP−P0),
• wherein a stroke volume V1 is a cylinder volume between the lower dead point to the top dead point,
• wherein a compression volume V2 is a cylinder volume when the piston is at the top dead point, and
• wherein V2 is in a range defined by the following equation:
• 0.8×{V1×P}≤V2<1.0×{V1×P}
• whereby, without using any relief valve, the compressor system is able to supply the compressed air whose supply pressure is controlled not to increase beyond the specified maximum supply pressure PP.