Scroll compression device and assembling method for scroll compression device

Abstract

There are provided a scroll compression device in which magnetization of a rotor and centering of a fixed scroll can be easily performed, and a method of assembling the scroll compression device. In a method of assembling a scroll compression device 1 comprising a scroll compression mechanism 11 having a fixed scroll 23 and a swing scroll 25 and a driving motor 13 that is connected to the scroll compression mechanism 11 through a driving shaft 15 to drive the scroll compression mechanism 11, the scroll compression mechanism and the DC motor being accommodated in a casing, the scroll compression mechanism 11 is supported in the casing 3 by a main frame 21, a rotor 39 of the driving motor 13 is magnetized, compressed gas which prevails against magnetic force caused by the magnetization and makes the swing scroll swingable is made to act on a discharge side of the scroll compression mechanism so that the swing scroll makes a swing motion and the swing scroll and the fixed scroll are centered after the rotor 39 is magnetized, and then the fixed scroll is positioned to the main frame.

1 . A method of assembling a scroll compression device comprising a scroll compression mechanism having a fixed scroll and a swing scroll to compress refrigerant, and an inverter-controlled DC motor that is connected to the scroll compression mechanism through a driving shaft to drive the scroll compression mechanism, the scroll compression mechanism and the DC motor being accommodated in a casing, characterized by comprising:
 supporting the scroll compression mechanism in the casing by a main frame;   magnetizing a rotor of the DC motor;   making compressed gas act on a discharge side of the scroll compression mechanism so that the swing scroll is made swingable while prevailing against magnetic force caused by the magnetization after the rotor is magnetized, whereby the swing scroll makes a swing motion and the swing scroll and the fixed scroll are centered; and then positioning the fixed scroll to the main frame.   
     
     
         2 . The method of assembling the scroll compression device according to  claim 1 , wherein the rotor is magnetized by repeating an operation of rotating the driving shaft by a predetermined angle, stopping the driving shaft, applying a voltage to stator windings of the DC motor, rotating the driving shaft by a predetermined angle again, stopping the driving shaft again and then applying the voltage again. 
     
     
         3 . The method of assembling the scroll compression device according to  claim 1 , wherein the rotor is magnetized before assembled to the DC motor. 
     
     
         4 . A method of assembling a scroll compression device comprising a scroll compression mechanism having a fixed scroll and a swing scroll to compress refrigerant, and an inverter-controlled DC motor that is connected to the scroll compression mechanism through a driving shaft to drive the scroll compression mechanism, the scroll compression mechanism and the DC motor being accommodated in a casing, characterized by comprising:
 supporting the scroll compression mechanism in the casing by a main frame;   positioning the fixed scroll to the main frame after compressed gas is made to act on a discharge side of the scroll compression mechanism so that the swing scroll makes a swing motion to center the swing scroll and the fixed scroll; and   repeating an operation of rotating the driving shaft by a predetermined angle, stopping the driving shaft, applying a voltage to windings of the DC motor, rotating the driving shaft by a predetermined angle again, stopping the driving shaft again and then applying the voltage again to magnetize the rotor.   
     
     
         5 . A scroll compression device comprising a scroll compression mechanism having a fixed scroll and a swing scroll to compress refrigerant, and an inverter-controlled DC motor that is connected to the scroll compression mechanism through a driving shaft to drive the scroll compression mechanism, the scroll compression mechanism and the DC motor being accommodated in a casing, characterized in that
 the scroll compression mechanism is supported in the casing by a main frame;   a rotor of the DC motor is magnetized;   after the rotor is magnetized, compressed gas which prevails against magnetic force caused by the magnetization and makes the swing scroll swingable is made to act on a discharge side of the scroll compression mechanism so that the swing scroll makes a swing motion and the swing scroll and the fixed scroll are centered; and then   the fixed scroll is positioned to the main frame, whereby the scroll compression mechanism is assembled.   
     
     
         6 . A scroll compression device comprising a scroll compression mechanism having a fixed scroll and a swing scroll to compress refrigerant, and an inverter-controlled DC motor that is connected to the scroll compression mechanism through a driving shaft to drive the scroll compression mechanism, the scroll compression mechanism and the DC motor being accommodated in a casing, characterized in that the
 the scroll compression mechanism is supported in the casing by a main frame;   the fixed scroll is positioned to the main frame after compressed gas is made to act on a discharge side of the scroll compression mechanism so that the swing scroll makes a swing motion to center the swing scroll and the fixed scroll; and   an operation of rotating the driving shaft by a predetermined angle, stopping the driving shaft, applying a voltage to windings of the DC motor, rotating the driving shaft by a predetermined angle again, stopping the driving shaft again and then applying the voltage again is repeated to magnetize the rotor, whereby the scroll compression device is assembled.