Laundry machine

Abstract

A laundry machine includes a cabinet and a tub is provided in the cabinet for holding washing water. A drum is rotatably provided in the tub, and a motor is provided at a rear of a tub for rotating the drum, where the motor includes a stator provided at a rear wall of the tub and a rotor. A transfer preventive unit provided at least at one of the stator and the tub to change a vibration/noise transfer function between the stator and the tub.

1 . A laundry machine comprising:
 a cabinet;   a tub provided in the cabinet for holding washing water;   a drum rotatably provided in the tub;   a motor provided at a rear of a tub for rotating the drum, wherein the motor comprises a stator provided at a rear wall of the tub and a rotor; and   a transfer preventive unit provided at least at one of the stator and the tub to change a vibration/noise transfer function between the stator and the tub.   
     
     
         2 . The laundry machine as claimed in  claim 1 , wherein the vibration/noise transfer function of the stator is changed by preventing the vibration of the stator from transmitting to the tub or changing factors of the transfer function of the stator. 
     
     
         3 . The laundry machine as claimed in  claim 1 , wherein the transfer preventive unit includes a plurality of tub fastening portions and a plurality of deformation portions, and wherein each deformation portion is arranged between tub fastening portions for connecting the tub fastening portions and deformable for attenuating the vibration. 
     
     
         4 . The laundry machine as claimed in  claim 3 , wherein the transfer preventive unit further includes a connection portion extended from the tub fastening portion in opposite directions and connected to an adjacent deformation portion. 
     
     
         5 . The laundry machine as claimed in  claim 4 , wherein the connection portion and the adjacent deformation portion are arranged in the same plane. 
     
     
         6 . The laundry machine as claimed in  claim 4 , wherein the connection portion is connected to at least one of the deformation portion and the tub fastening portion at an angle. 
     
     
         7 . The laundry machine as claimed in  claim 6 , wherein the connection portion comprises at least one introducing portion connecting to at least one of the deformation portion and the tub fastening portion at an angle. 
     
     
         8 . The laundry machine as claimed in  claim 6 , wherein the connection portion comprises a plurality of introducing portions, wherein one introducing portion is formed to have an angle with another introducing portion. 
     
     
         9 . The laundry machine as claimed in  claim 4 , wherein the stator further includes an insulator, and the transfer prevention unit is arranged in a plane different from a plane of the insulator. 
     
     
         10 . The laundry machine as claimed in  claim 9 , wherein the connection portion comprises a plurality of introducing portions, wherein the plurality of introducing portions form a stair-like structure such that the connection portion is arranged in a plane lower than the tub fastening portion. 
     
     
         11 . The laundry machine as claimed in  claim 9 , wherein a tub fastening portion of the transfer prevention unit is arranged on a plane different from the plane of the insulator, and a connection portion and a deformation portion of the transfer prevention unit extends at planes different from each other. 
     
     
         12 . The laundry machine as claimed in  claim 2 , wherein at least one of a natural frequency and a critical frequency of the stator is changed, and the critical frequency is defined as a frequency at which vibration of the rotor is transferred to a tub through the stator without being amplified and attenuated. 
     
     
         13 . The laundry machine as claimed in  claim 12 , wherein the critical frequency is adjusted to be smaller than a maximum frequency range of the rotor. 
     
     
         14 . The laundry machine as claimed in  claim 12 , wherein the critical frequency is adjusted to be lower than a maximum vibration frequency of the rotor. 
     
     
         15 . The laundry machine as claimed in  claim 14 , wherein the critical frequency is adjusted by reducing the natural frequency of the stator. 
     
     
         16 . The laundry machine as claimed in  claim 15 , wherein the natural frequency is reduced by changing an elastic modulus of the stator. 
     
     
         17 . The laundry machine as claimed in  claim 16 , further comprising a supporting member on an underside of the stator, and the supporting member connects the stator to the tub. 
     
     
         18 . The laundry machine as claimed in  claim 17 , wherein at least one of a thickness and a length of the supporting member is adjusted such that a critical frequency of the stator is set below a maximum vibration frequency of the rotor. 
     
     
         19 . The laundry machine as claimed in  claim 1 , wherein the transfer prevention unit is made of an elastic material.