Air compressor

An air compressor comprising:

• a housing;
• a rotary shaft disposed inside the housing;
• a compression part that is connected to the rotary shaft and compresses and discharges introduced air;
• a motor part that drives the rotary shaft;
• a control board that controls the motor part;
• a filter part that filters noise of external power and supplies the external power to the control board, wherein the filter part includes:
• a capacitor assembly connected to an external power source;
• a transistor connected to the control board;
• a current sensor assembly connected to the transistor;
• and
• a discharge resistor that is connected to the capacitor assemble and discharges residual charge in the capacitor assembly,
• a transfer module that transfers power from the control board to the motor part, wherein the discharge resistor is disposed adjacent to the transfer module, the transfer module includes a transfer unit extending outward in a radial direction from the motor part,
• wherein the capacitor assembly includes:
• a capacitor;
• a case supporting the capacitor;
• and
• a resistor connection terminal connected to a discharge resistor, wherein the resistor connection terminal is disposed on the capacitor,
• wherein the current sensor assembly and the capacitor assembly are disposed in a first direction perpendicular to an axial direction, the transistor is disposed in a second direction perpendicular to the first direction with respect to the current sensor assembly and the capacitor assembly
• wherein an inner space of the housing is divided into a first space in which the capacitor assembly is disposed and a second space in which the current sensor assembly is disposed, based on an imaginary line extending in an axial direction, the discharge resistor is disposed in the first space,
• wherein the discharge resistor is disposed on a lower side of the case.

An air compressor comprising:

• a housing;
• a rotary shaft disposed inside the housing;
• a compression part that is connected to the rotary shaft and compresses and discharges introduced air;
• a motor part that drives the rotary shaft;
• a control board that controls the motor part;
• a filter part that filters noise of external power and supplies the external power to the control board, wherein the filter part includes:
• a capacitor assembly connected to an external power source;
• a transistor connected to the control board;
• a current sensor assembly connected to the transistor;
• and
• a discharge resistor that is connected to the capacitor assemble and discharges residual charge in the capacitor assembly,
• a transfer module that transfers power from the control board to the motor part, wherein the discharge resistor is disposed adjacent to the transfer module, the transfer module includes a transfer unit extending outward in a radial direction from the motor part;
• and
• a second cover disposed in the housing, wherein the second cover includes:
• a first support part supporting the current sensor assembly and
• a second support part supporting the transfer unit,
• wherein the capacitor assembly includes:
• a capacitor;
• a case supporting the capacitor;
• and
• a resistor connection terminal connected to a discharge resistor, wherein the resistor connection terminal is disposed on the capacitor.