Linear compressor

A linear compressor comprising:

• a cylinder that defines a compression space configured to receive refrigerant;
• and
• a piston disposed in the cylinder and configured to reciprocate relative to the piston along an axial direction of the cylinder,
• wherein the cylinder comprises:
• a gas inlet defined at an outer circumferential surface of the cylinder,
• a supply port that passes through the cylinder in a radial direction of the cylinder and is fluid communication with the gas inlet, and
• a recess that is in fluid communication with the supply port and defined at an inner circumferential surface of the cylinder, wherein an axial cross section of the recess has a curvature.

A linear compressor comprising:

• a cylinder that defines a compression space configured to receive refrigerant;
• and
• a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
• wherein the cylinder comprises:
• a gas inlet defined at an outer circumferential surface of the cylinder,
• a supply port that passes through the cylinder in a radial direction of the cylinder and is fluid communication with the gas inlet, and
• a recess that is in fluid communication with the supply port and defined at an inner circumferential surface of the cylinder, and
• wherein an axial cross section of the recess is defined by:
• a first straight line that is connected to the supply port, the first straight line defining a right angle with respect to the radial direction, and
• a second straight line that extends from the first straight line and is connected to the inner circumferential surface of the cylinder, the second straight line defining an acute angle with respect to the axial direction.

A linear compressor comprising:

• a cylinder that defines a compression space configured to receive refrigerant;
• and
• a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
• wherein the cylinder comprises:
• a gas inlet defined at an outer circumferential surface of the cylinder,
• a supply port that passes through the cylinder in a radial direction of the cylinder and is fluid communication with the gas inlet, and
• a recess that is in fluid communication with the supply port and defined at an inner circumferential surface of the cylinder, and
• wherein an axial cross section of the recess is defined by:
• a straight line that is connected to the supply port, the straight line defining a right angle with respect to the radial direction, and
• a curved line that extends from the straight line and is connected to the inner circumferential surface of the cylinder.