Air compressor

Patent metadata

Field	Value
Publication number	US-2023327524-A1
Application number	US-202118025330-A
Country	US
Kind code	A1
Filing date	Sep 8, 2021
Priority date	Sep 24, 2020
Publication date	Oct 12, 2023
Grant date	—

Abstract

The present invention relates to an air compressor which improves the space utilization of a filter unit, and reduces the number of constituent parts constituting the filter unit, thereby improving assemblability, reducing manufacturing costs, and minimizing the size of the air compressor itself. The air compressor comprises: a housing; a rotating shaft extending in the longitudinal direction inside the housing; a compression unit disposed in front of the rotating shaft and rotated by the rotating shaft to compress and discharge air that flows in; a motor unit which rotates the rotating shaft; a control board which controls the motor unit; a filter unit which supplies external electrical power to the control board and filters the noise of the electrical power; and a bus bar assembly which transfers the electrical power from the control board to the motor unit.

First claim

1 . An air compressor comprising:
a housing; a rotating shaft extending in a longitudinal direction in the housing; a compression unit which is disposed in front of the rotating shaft and rotated by the rotating shaft to compress and discharge introduced air; a motor unit which rotates the rotating shaft; a control board which controls the motor unit; a filter unit which supplies external power to the control board and filters noise of the power; and a busbar assembly which transmits power of the control board to the motor unit.

2 . The air compressor of claim 1 , wherein the filter unit is disposed outside the motor unit in a radial direction.

3 . The air compressor of claim 1 , wherein the busbar assembly includes:
a plurality of busbars electrically connected to the motor unit; and a busbar fixing member which fixes the plurality of busbars to the housing in a state in which the plurality of busbars are insulated.

4 . The air compressor of claim 3 , wherein:
the plurality of busbars extend outward from the motor unit in the radial direction; and each end portion of the plurality of busbars is bent in at least two directions.

5 . The air compressor of claim 4 , wherein the end portions of the plurality of busbars are exposed from the busbar fixing member in a state in which the end portions of the plurality of busbars are spaced apart from each other.

6 . The air compressor of claim 5 , wherein the filter unit includes:
a transistor connected to the control board; a capacitor assembly connected to one side of the transistor; and a current sensor assembly connected to the other side of the transistor, wherein the capacitor assembly and the current sensor assembly are disposed at both sides with respect to the busbar assembly.

7 . The air compressor of claim 6 , wherein the plurality of busbars include:
a U-phase busbar extending toward the capacitor assembly; and a V-phase busbar and a W-phase busbar which extend toward the current sensor assembly, wherein the U-phase busbar is electrically connected to the capacitor assembly, and the V-phase busbar and the W-phase busbar are electrically connected to the current sensor assembly.

8 . The air compressor of claim 7 , wherein the capacitor assembly includes:
a case; a capacitor module embedded in the case; and a power transmission busbar connected to the U-phase busbar.

9 . The air compressor of claim 8 , wherein the power transmission busbar is integrally formed with the case in an injection molding method.

10 . The air compressor of claim 8 , wherein the power transmission busbar is assembled with the case.

11 . The air compressor of claim 6 , wherein the housing includes a first accommodation unit in which the filter unit is accommodated.

12 . The air compressor of claim 11 , wherein:
the first accommodation unit includes at least one mounting surface on which the filter unit is mounted; and at least one weight lightening groove portion, in which a part of the filter unit is disposed, is formed in the mounting surface.

13 . The air compressor of claim 12 , wherein:
a plurality of coupling regions, in which the capacitor assembly, the current sensor assembly, and the busbar assembly are coupled, are disposed on the mounting surface; and all of the plurality of coupling regions are positioned coplanar with each other.

14 . The air compressor of claim 1 , further comprising a plurality of cooling paths disposed between the motor unit and the filter unit,
wherein the plurality of cooling paths are disposed to be space apart from each other in a circumferential direction of the motor unit to surround at least one side of the motor unit.

15 . The air compressor of claim 14 , wherein the busbar assembly is disposed to pass between the plurality of cooling paths spaced apart from each other.

16 . The air compressor of claim 6 , further comprising a connector unit through which a high-voltage current is applied to the filter unit and a signal detected by the filter unit is transmitted to the control board.

17 . The air compressor of claim 16 , wherein the connector unit includes:
a first connector which electrically connects the control board and the current sensor assembly; and a second connector which electrically connects an external power source and the capacitor assembly and through which a high-voltage direct current (DC) current is applied to the capacitor assembly.

18 . The air compressor of claim 17 , wherein the first connector includes an interlock wire which is electrically connected to the second connector and checks whether the capacitor assembly and the second connector are connected.

19 . The air compressor of claim 18 , further comprising a cooling cover which is disposed to cover at least one surface of the transistor and absorbs heat of the transistor.

20 . The air compressor of claim 19 , wherein the cooling cover includes a connector fixing part to fix one side of the connector unit.

21 . The air compressor of claim 11 , wherein:
the housing includes a second accommodation unit in which the control board is disposed; and the first accommodation unit and the second accommodation unit are disposed orthogonal to each other.

Assignees

• Hanon Systems

Inventors

• Choi Kyu Sung
• Kim Hyun Chil
• Park Gun Woong
• Park Min Gyu
• Park Chi Yong
• Sung Yeol Woo
• Yang Hyun Sup
• Lee Jong Sung

Classifications

• H02K11/33 Primary

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• F04D25/0693 Primary

  Details or arrangements of the wiring · CPC title

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title