Local exhaust apparatus

Abstract

A local exhaust system includes a motor provided in an exhaust pipe to generate a rotary drive force when power is applied thereto, in which air is taken in through an intake port and exhausted through the exhaust pipe, a rotor structure disposed on the leading end of the intake port and connected to a drive shaft of the motor, the rotor structure rotating about a central portion of the exhaust pipe, and a plurality of turbulence-generating outer blades for generating a turbulent flow when rotated. Each of the turbulence-generating outer blades is assembled to the outer surface of the rotor structure via an angle-adjusting member in such a fashion that the angle of the turbulence-generating outer blade is adjustable with respect to the direction in which air is taken in through the intake port.

1 . A local exhaust system comprising:
 a motor provided in an exhaust pipe to generate a rotary drive force when power is applied thereto, wherein air is taken in through an intake port and exhausted through the exhaust pipe;   a rotor structure disposed on a leading end of the intake port and connected to a drive shaft of the motor, the rotor structure rotating about a central portion of the exhaust pipe; and   a plurality of turbulence-generating outer blades for generating a turbulent flow when rotated, wherein each of the turbulence-generating outer blades is assembled to an outer surface of the rotor structure via an angle-adjusting member in such a fashion that an angle of the turbulence-generating outer blade is adjustable with respect to a direction in which air is taken in through the intake port.   
     
     
         2 . The local exhaust system according to  claim 1 , further comprising an intake-exhaust inner blade provided on the rotor structure to be located inside the rotor structure or on a rotary shaft in a central portion of the rotor structure to be located inside the exhaust pipe, wherein the intake-exhaust inner blade generates an intake-exhaust force inside the rotor structure or the exhaust pipe. 
     
     
         3 . The local exhaust system according to  claim 2 , wherein the rotor structure comprises a hollow cylindrical member, with inner and outer surfaces thereof being parallel with the direction in which air is taken in, and wherein the intake-exhaust inner blade has a fixed end fixed to an outer circumference of the rotor structure and a free end bent from the fixed end, the free end extending a predetermined length such that the free end is introduced into intake port. 
     
     
         4 . The local exhaust system according to  claim 2 , wherein the intake-exhaust inner blade has a fixed end fixed to an outer circumference of the rotor structure, which is arranged inside the exhaust pipe, and a free end bent from the fixed end and extending a predetermined length toward the exhaust pipe. 
     
     
         5 . The local exhaust system according to  claim 1 , wherein a plurality of the turbulence-generating outer blades is provided on an outer circumference of the rotor structure comprising a hollow cylindrical member, with inner and outer surfaces thereof being parallel with the direction in which air is taken in, or on a lower surface of the rotor structure comprising a hollow disc member, with lower and upper surfaces thereof being perpendicular to the direction in which air is taken in. 
     
     
         6 . The local exhaust system according to  claim 1 , wherein the angle-adjusting member includes an erected member extending perpendicularly from the outer surface of the rotor structure and fitted into a coupling hole, which penetrates a central portion of each body of the turbulence-generating outer blades, and a fixing member assembled to one end of the erected member to fix each of the turbulence-generating outer blades in position, with an angle of the each turbulence-generating outer blade adjusted about the erected member, the fixing member being closely fixed to the each turbulence-generating outer blade. 
     
     
         7 . The local exhaust system according to  claim 6 , wherein the erected member has a plurality of ribs, which protrude from an outer surface of a body of the erected member and extend in a lengthwise direction of the erected member, such that the ribs conform to and are coupled with a plurality of coupling grooves of the coupling hole, wherein the coupling grooves are recessed into an inner surface and extend in a lengthwise direction of the coupling hole. 
     
     
         8 . The local exhaust system according to  claim 6 , wherein the erected member has a plurality of ribs, which protrudes from an outer surface of a portion of a body of the erected member and extends in a lengthwise direction of the erected member, such that the ribs conform to and are coupled with a plurality of coupling grooves of the coupling hole, wherein the coupling grooves are formed in an outer end portion of the coupling hole, and an outer surface of a remaining portion of the body of the erected member has a circular cross section such that the remaining portion of the body of the erected member is insertable into an inner surface of an inner end portion of the coupling hole. 
     
     
         9 . A local exhaust system comprising:
 a motor provided in an exhaust pipe to generate a rotary drive force when power is applied thereto, wherein air is taken in through an intake port and exhausted through the exhaust pipe;   a rotor structure disposed on a leading end of the intake port and connected to a drive shaft of the motor, the rotor structure rotating about a central portion of the exhaust pipe;   a plurality of turbulence-generating outer blades provided on an outer surface of the rotor structure at predetermined intervals, wherein the turbulence-generating outer blades generate a turbulent flow in a lower portion of the rotor structure while being rotated in a predetermined direction under a driving force from the motor; and   an intake-exhaust inner blade provided on a rotary shaft in a central portion of the rotor structure or inside the rotor structure, such that intake-exhaust inner blade generates an intake-exhaust force inside the exhaust pipe while being rotated in a predetermined direction under a driving force from the motor.   
     
     
         10 . The local exhaust system according to  claim 9 , wherein the rotor structure comprises a hollow cylindrical member, with inner and outer surfaces thereof being parallel with the direction in which air is taken in, and wherein the intake-exhaust inner blade has a fixed end fixed to an outer circumference of the rotor structure and a free end bent from the fixed end, the free end extending a predetermined length such that the free end is introduced into intake port. 
     
     
         11 . The local exhaust system according to  claim 9 , wherein the intake-exhaust inner blade has a fixed end fixed to an outer circumference of the rotor structure, which is arranged inside the exhaust pipe, and a free end bent from the fixed end and extending a predetermined length toward the exhaust pipe. 
     
     
         12 . The local exhaust system according to  claim 9 , wherein the turbulence-generating outer blades are assembled to an outer circumference of the rotor structure via an angle-adjusting member, such that an angle of each of the turbulence-generating outer blades is adjustable, or fixedly positioned on the outer circumference of the rotor structure, wherein the rotor structure comprises a hollow cylindrical member, with inner and outer surfaces thereof being parallel with the direction in which air is taken in. 
     
     
         13 . The local exhaust system according to  claim 9 , wherein the turbulence-generating outer blades are assembled to an outer circumference of the rotor structure via an angle-adjusting member, such that an angle of each of the turbulence-generating outer blades is adjustable, or fixedly positioned on the outer circumference of the rotor structure, wherein the rotor structure comprises a hollow disc member, with inner and outer surfaces thereof being perpendicular to the direction in which air is taken in. 
     
     
         14 . The local exhaust system according to  claim 12  or  13 , wherein the angle-adjusting member includes an erected member extending perpendicularly from the outer surface of the rotor structure and fitted into a coupling hole, which penetrates a central portion of each body of the turbulence-generating outer blades, and a fixing member assembled to one end of the erected member to fix each of the turbulence-generating outer blades in position, with an angle of the each turbulence-generating outer blade adjusted about the erected member, the fixing member closely fixed to the each turbulence-generating outer blade. 
     
     
         15 . The local exhaust system according to  claim 14 , wherein the erected member has a plurality of ribs, which protrudes from an outer surface of a body of the erected member and extends in a lengthwise direction of the erected member, such that the ribs conform to and are coupled with a plurality of coupling grooves of the coupling hole, and wherein the coupling grooves are recessed into an inner surface of the coupling hole and extend in a lengthwise direction of the coupling hole. 
     
     
         16 . The local exhaust system according to  claim 14 , wherein the erected member has a plurality of ribs, which protrudes from an outer surface of a portion of a body of the erected member and extends in a lengthwise direction of the erected member, such that the ribs conform to and are coupled with a plurality of coupling grooves of the coupling hole, wherein the coupling grooves are formed in an outer end portion of the coupling hole, and an outer surface of a remaining portion of the body of the erected member has a circular cross section such that the remaining portion of the body of the erected member is insertable into an inner surface of an inner end portion of the coupling hole.