Compressor arrangement with integrated motor

Abstract

The invention refers to a rotary compressor arrangement (100) comprising a stationary member (40) centered at a shaft axis (X) and a rotary member (90) rotating around the stationary member (40); the stationary member (40) and the rotary member (90) being inside a hermetically sealed inner volume within the compressor arrangement (100); the compressor arrangement (100) comprising a stator (210) with a winding arrangement (211) generating an electromagnetic force inside the stator (210), the stator (210) being arranged outside the hermetically sealed inner volume; the compressor arrangement (100) further comprising a plurality of magnets (221) directly attached to the rotary member (90) and facing the winding arrangement (211) in the stator (210) such that the rotary member (90) is entrained in rotation by a rotating electromagnetic field from the stator (210). The invention further refers to a cooling/refrigerating system comprising such a rotary compressor arrangement (100).

1 . Rotary compressor arrangement comprising: a stationary member centered at a shaft axis and a rotary member rotating around the stationary member;
 the stationary member and the rotary member being inside a hermetically sealed inner volume within the compressor arrangement;   the compressor arrangement comprising a stator with a winding arrangement generating an electromagnetic force inside the stator, the stator being arranged outside the hermetically sealed inner volume; and   the compressor arrangement further comprising a plurality of magnets directly attached to the rotary member and facing the winding arrangement in the stator such that the rotary member is entrained in rotation by a rotating electromagnetic field from the stator.   
     
     
         2 . Rotary compressor arrangement according to  claim 1  further comprising: a rolling member eccentrically arranged with respect to the stationary member such that a chamber is created between them;
 the arrangement further comprising at least one satellite element entrained in rotation by the rotary member; and 
 the at least one satellite element orbiting at an offset axis and entraining in rotation the rolling member and ensuring a contact between the stationary member and the rolling member. 
 
     
     
         3 . Rotary compressor arrangement according to  claim 1  further comprising an upper plate and a lower plate arranged to close in height in a tight manner at least one compression chamber created between the stationary member and the rolling member. 
     
     
         4 . Rotary compressor arrangement according to  claim 3  further comprising at least one segment element arranged between the upper and/or lower plates to allow a tight sealing of at least one compression chamber and the movement of the rolling member. 
     
     
         5 . Rotary compressor arrangement according to  claim 2  wherein at least a pair of satellite elements is arranged in height in the rotary member in such a way that the magnets are located between them. 
     
     
         6 . Rotary compressor arrangement according to  claim 5  wherein the rotary member is configured as a cylinder, the magnets being directly attached in an external diametric circumference of it. 
     
     
         7 . Rotary compressor arrangement according to  claim 2  wherein the satellite elements are mounted over bearings. 
     
     
         8 . Rotary compressor arrangement according to  claim 1  wherein the stator comprises a laminated magnetic core embedded in a resin material, the stator being an integral part of the motor housing. 
     
     
         9 . Rotary compressor arrangement according to  claim 1  wherein the distance separating the winding arrangement and the magnets is as small as possible. 
     
     
         10 . Rotary compressor arrangement according to  claim 1  further comprising at least one sealing piston slidable within the stationary member during rotation of the rolling member creating at least one compression chamber whose volume is decreased by rotation of the rolling member so that a compressible fluid is compressed before being discharged. 
     
     
         11 . Rotary compressor arrangement according to  claim 10  wherein lubricating oil is also provided together with the compressible fluid, compatible with it. 
     
     
         12 . Cooling/Refrigerating system comprising a rotary compressor arrangement comprising: a stationary member centered at a shaft axis and a rotary member rotating around the stationary member; the stationary member and the rotary member being inside a hermetically sealed inner volume within the compressor arrangement; the compressor arrangement comprising a stator with a winding arrangement generating an electromagnetic force inside the stator, the stator being arranged outside the hermetically sealed inner volume; and the compressor arrangement further comprising a plurality of magnets directly attached to the rotary member and facing the winding arrangement in the stator such that the rotary member is entrained in rotation by a rotating electromagnetic field from the stator.