Rotational apparatus unit

Abstract

A rotational apparatus unit includes a compressor and a motor-generator. The compressor has a housing and a drive shaft supported by the housing. The motor-generator drives the drive shaft in accordance with electric current supplied from outside. The motor-generator is located on a periphery of the housing of the compressor such that an axis of the motor-generator is coaxial with an axis of the drive shaft.

1 . A rotational apparatus unit comprising: 
 a rotational apparatus, wherein the rotational apparatus has a housing and a drive shaft supported by the housing; and    a motor for driving the drive shaft in accordance with electric current supplied from outside, and wherein the motor is located on a periphery of the housing of the rotational apparatus such that an axis of the motor is coaxial with an axis of the drive shaft.    
     
     
         2 . The unit according to  claim 1 , wherein the rotational apparatus is connected to an engine via a power transmission mechanism, wherein, when the engine drives, the drive shaft is driven by power from the engine and, when the engine stops, the drive shaft is driven by power from the motor.  
     
     
         3 . The unit according to  claim 2 , wherein the rotational apparatus is accommodated in the housing, wherein the rotational apparatus has a driving mechanism, which is driven by the drive shaft, wherein the housing has a large diameter portion, which accommodates the driving mechanism, and a small diameter portion, which supports the power transmission mechanism, and wherein the motor is located to surround at least a part of the large diameter portion.  
     
     
         4 . The unit according to  claim 2 , wherein the power transmission mechanism includes a mechanical device, wherein the mechanical device permits power transmission from the engine to the rotational apparatus and prevents power transmission from the motor to the engine.  
     
     
         5 . The unit according to  claim 1 , wherein the rotational apparatus is a compressor, which is a part of a refrigerant circuit of an air conditioner.  
     
     
         6 . The unit according to  claim 1 , the motor comprising: 
 a stator fixed on the periphery of the housing;    a rotor located rotatably on the periphery of the housing; and    a fan located in the rotor..    
     
     
         7 . The unit according to  claim 1 , the motor comprising: 
 a stator fixed on the periphery of the housing; and    a rotor located rotatably on the periphery of the housing, wherein the rotor faces the stator and is generally aligned with the stator in the axial direction of the drive shaft.    
     
     
         8 . A rotational apparatus unit connected to an engine via a power transmission mechanism, the rotational apparatus unit comprising: 
 a rotational apparatus, the rotational apparatus has a housing and a drive shaft supported by the housing, wherein the drive shaft rotates by power of the engine; and    a generator, which is driven by power of the engine for generating electricity, wherein the generator is located on the periphery of the housing of the rotational apparatus such that an axis of the generator is coaxial with an axis of the drive shaft.    
     
     
         9 . The unit according to  claim 8 , wherein the rotational apparatus is accommodated in the housing, wherein the rotational apparatus has a driving mechanism, which is driven by the drive shaft, wherein the housing has a large diameter portion, which accommodates most of the driving mechanism, and a small diameter portion, which supports the power transmission mechanism, and wherein the motor is located to surround at least a part of the large diameter portion.  
     
     
         10 . The unit according to  claim 8 , wherein the rotational apparatus is a compressor, which is a part of a refrigerant circuit of an air conditioner.  
     
     
         11 . The unit according to  claim 8 , the generator comprising: 
 a stator fixed on the periphery of the housing;    a rotor located rotatably on the periphery of the housing; and    a fan located in the rotor.    
     
     
         12 . The unit according to  claim 8 , the generator comprising: 
 a stator fixed on the periphery of the housing; and    a rotor located rotatably on the periphery of the housing, wherein the rotor faces the stator and is generally aligned with the stator in the axial direction of the drive shaft.    
     
     
         13 . A rotational apparatus unit used for an air conditioner for a vehicle, wherein the rotational apparatus unit is connected to an engine, the unit comprising: 
 a compressor, wherein the compressor has a housing and a drive shaft supported by the housing; and    a motor-generator, wherein, when the engine drives, the drive shaft is driven by power of the engine and the motor-generator is driven to generate electricity, wherein, when the engine stops, the generator portion drives the drive shaft in accordance with electric current supplied from outside, and wherein the motor-generator is located on a periphery of the housing of the rotational apparatus such that an axis of the motor-generator is coaxial with an axis of the drive shaft.    
     
     
         14 . The unit according to  claim 13 , the motor-generator comprising: 
 a stator fixed on the periphery of the housing;    a rotor located rotatably on the periphery of the housing; and    a fan located in the rotor.    
     
     
         15 . The unit according to  claim 13 , motor-generator comprising: 
 a stator fixed on the periphery of the housing; and    a rotor located rotatably on the periphery of the housing, wherein the rotor faces the stator and is generally aligned with the stator in the axial direction of the drive shaft.