Apparatus for suppressing surge of turbo compressor

1. An apparatus for suppressing a surge of a turbo compressor, comprising:

a compressor housing having a compressor wheel disposed in the compressor housing and an inlet configured to introduce air flowing into the compressor housing, and the inlet protrudes in a direction opposite to the compressor wheel;

a connection module having a first side connected to the compressor housing to communicate with the inlet of the compressor housing and a second side having an intake hole for supplying air;

a flexible cone of an elastic material disposed in the connection module and formed in a conical shape, wherein the flexible cone has a first side and a second side, wherein a size of a cross-sectional area of the first side of the flexible cone is different from a size of a cross-sectional area of the second side of the flexible cone; and

a spring member coupled to an exterior circumferential surface of the flexible cone to provide an elastic force and operated to change a size of at least one of the cross-sectional area of the first side of the flexible cone and the cross-sectional area of the second side of the flexible cone,

wherein the cross-sectional area of the first side of the flexible cone is smaller than the cross-sectional area of the second side of the flexible cone, wherein the first side of the flexible cone communicates with the inlet of the compressor housing and the second side of the flexible cone is coupled to the intake hole of the connection module, and the cross-sectional area of the first side of the flexible cone is smaller than a cross-sectional area of the inlet of the compressor housing,

wherein the compressor housing includes a coupling aperture that protrudes while surrounding the inlet of the compressor housing, and the connection module has an exterior circumferential surface disposed in an interior side of the coupling aperture of the compressor housing and connected to the compressor housing,

wherein the connection module includes:

a selectively rotatable rotary member formed to have a first side and a second side having different cross-sectional areas, wherein the cross-sectional area of the first side of the rotary member is smaller than the cross-sectional area of the second side of the rotary member, wherein the first side of the rotary member is coupled to the inlet of the compressor housing and an exterior circumferential surface of the second side of the rotary member is disposed in the coupling aperture; and

a fixing member having a first side and a second side, wherein the first side of the fixing member is coupled to the second side of the rotary member to be relatively rotatable, and the second side of the fixing member includes the intake hole of the connection module, and

wherein the rotary member includes a locking portion to lock a first end of the spring member, a second end of the spring member is coupled to the intake hole of the connection module together with the flexible cone, and an intermediate portion of the spring member is coupled to the exterior circumferential surface of the flexible cone.

2. The apparatus of claim 1 , wherein the locking portion of the rotary member includes a protrusion protruding in a radial direction, wherein when the first end of the spring member is expanded while being positioned at the protrusion by rotation of the rotary member, the cross-sectional area of the first side of the flexible cone expands to be equal to the cross-sectional area of the inlet of the compressor housing.

3. The apparatus of claim 2 , wherein the compressor housing includes a first aperture disposed on a side wall forming the inlet of the compressor housing and is configured to guide air on the compressor wheel side to a chamber formed from the coupling aperture and the rotary member, an exterior circumferential surface of the rotary member is formed with a second aperture, and the exterior circumferential surface of the flexible cone is formed with a third aperture to re-circulate air.

4. The apparatus of claim 3 , wherein the second aperture of the rotary member and the third aperture of the flexible cone are misaligned from each other.

5. The apparatus of claim 1 , wherein a sealing member is disposed between an exterior circumferential surface of the fixing member and an interior side surface of the coupling aperture.