Motor-driven compressor

Abstract

A motor-driven compressor in which an electric driving mechanism is capable of keeping high efficiency. The compressor includes an electric driving mechanism, a compression mechanism and a motor drive circuit. The electric driving mechanism is accommodated in a housing. The housing has a main body portion in a cylindrical shape, a bulging portion that bulges in a radially outward direction from the main body portion, and a partition wall. In the main body portion, a stator accommodation chamber is formed. In the stator accommodation chamber, a stator of the electric driving mechanism is accommodated. In the bulging portion, a cluster block accommodation chamber is formed. In the cluster block accommodation chamber, a cluster block is accommodated. A partition wall separates the stator accommodation chamber and the cluster block accommodation chamber in a radial direction. The main body portion and the partition wall support a stator core.

1 . A motor-driven compressor comprising an electric driving mechanism, a compression mechanism that is driven by the electric driving mechanism, and performs compression of a refrigerant, and a motor drive circuit for driving the electric driving mechanism,
 wherein the electric driving mechanism has a stator that is accommodated in a housing, and has a stator core and a coil provided at the stator core, a rotor rotatably provided in the stator, a drive shaft that is fixed to the rotor and drives the compression mechanism, a lead wire connected to the coil, and a cluster block for electrically connecting the lead wire to the motor drive circuit,   the housing has a main body portion in a cylindrical shape that forms a stator accommodation chamber in which the stator is accommodated in an inside thereof, a bulging portion that bulges in a radially outward direction from the main body portion, and forms a cluster block accommodation chamber in which the cluster block is accommodated in an inside thereof, and a partition wall that separates the stator accommodation chamber and the cluster block accommodation chamber in a radial direction, and   the housing supports the stator core at the main body portion and the partition wall, and has the lead wire disposed across the stator accommodation chamber and the cluster block accommodation chamber.   
     
     
         2 . The motor-driven compressor according to  claim 1 ,
 wherein a wall surface at a side of the stator accommodation chamber, of the partition wall is a cylindrical surface that is coaxial with the main body portion.   
     
     
         3 . The motor-driven compressor according to  claim 1 ,
 wherein between the stator accommodation chamber and the cluster block accommodation chamber, an insertion path that allows the lead wire to be inserted therethrough at a side of the compression mechanism is formed, and   the partition wall separates the stator accommodation chamber and the cluster block accommodation chamber except for the insertion path.   
     
     
         4 . The motor-driven compressor according to  claim 1 ,
 wherein a wall surface at a side of the stator accommodation chamber, of the partition wall is a cylindrical surface that is coaxial with the main body portion,   between the stator accommodation chamber and the cluster block accommodation chamber, an insertion path that allows the lead wire to be inserted therethrough at a side of the compression mechanism is formed, and   the partition wall separates the stator accommodation chamber and the cluster block accommodation chamber except for the insertion path.   
     
     
         5 . The motor-driven compressor according to  claim 1 ,
 wherein a wall surface at a side of the stator accommodation chamber, of the partition wall is a cylindrical surface that is coaxial with the main body portion,   between the stator accommodation chamber and the cluster block accommodation chamber, an insertion path that allows the lead wire to be inserted therethrough at a side of the compression mechanism is formed,   the partition wall separates the stator accommodation chamber and the cluster block accommodation chamber except for the insertion path, and   the lead wire is connected to the coil by a connector.   
     
     
         6 . The motor-driven compressor according to  claim 1 ,
 wherein the cluster block is fixed to the stator core via a fitting member, and   in the partition wall, a slit is formed, which allows the stator accommodation chamber and the cluster block accommodation chamber to communicate with each other, allows the fitting member to be inserted therethrough, and extends in an axial direction of the drive shaft.   
     
     
         7 . The motor-driven compressor according to  claim 1 ,
 wherein a wall surface at a side of the stator accommodation chamber, of the partition wall is a cylindrical surface that is coaxial with the main body portion,   the cluster block is fixed to the stator core via a fitting member, and   in the partition wall, a slit is formed, which allows the stator accommodation chamber and the cluster block accommodation chamber to communicate with each other, allows the fitting member to be inserted therethrough, and extends in an axial direction of the drive shaft.   
     
     
         8 . The motor-driven compressor according to  claim 1 ,
 wherein the cluster block is fixed to the stator core via a fitting member,   in the partition wall, a slit is formed, which allows the stator accommodation chamber and the cluster block accommodation chamber to communicate with each other, allows the fitting member to be inserted therethrough, and extends in an axial direction of the drive shaft,   in the housing, a plurality of refrigerant channels that allow the refrigerant to circulate in the axial direction of the drive shaft are formed between the housing and the stator core, and   the slit and the respective refrigerant channels are equiangularly spaced from one another in a circumferential direction of the housing.   
     
     
         9 . The motor-driven compressor according to  claim 1 ,
 wherein the cluster block is fixed to the stator core via a fitting member,   in the partition wall, a slit is formed, which allows the stator accommodation chamber and the cluster block accommodation chamber to communicate with each other, allows the fitting member to be inserted therethrough, and extends in an axial direction of the drive shaft,   in the housing, a plurality of refrigerant channels that allow the refrigerant to circulate in the axial direction of the drive shaft are formed between the housing and the stator core, and   the slit and the respective refrigerant channels are formed to have widths equal to one another in a circumferential direction of the housing.   
     
     
         10 . A motor-driven compressor comprising an electric driving mechanism, a compression mechanism that is driven by the electric driving mechanism, and performs compression of a refrigerant, and a motor drive circuit for driving the electric driving mechanism,
 wherein the electric driving mechanism has a stator that is accommodated in a housing, and has a stator core and a coil provided at the stator core, a rotor rotatably provided in the stator, a drive shaft that is fixed to the rotor and drives the compression mechanism, a lead wire connected to the coil, and a cluster block for electrically connecting the lead wire to the motor drive circuit,   the housing has a main body portion in a cylindrical shape that forms a stator accommodation chamber in which the stator is accommodated in an inside thereof, a bulging portion that bulges in a radially outward direction from the main body portion, and forms a cluster block accommodation chamber in which the cluster block is accommodated in an inside thereof, and a partition wall that separates the stator accommodation chamber and the cluster block accommodation chamber in a radial direction,   the housing supports the stator core at the main body portion and the partition wall, and has the lead wire disposed across the stator accommodation chamber and the cluster block accommodation chamber,   a wall surface at a side of the stator accommodation chamber, of the partition wall is a cylindrical surface that is coaxial with the main body portion,   between the stator accommodation chamber and the cluster block accommodation chamber, an insertion path that allows the lead wire to be inserted therethrough at a side of the compression mechanism is formed,   the partition wall separates the stator accommodation chamber and the cluster block accommodation chamber except for the insertion path,   the compression mechanism, the electric driving mechanism and the motor drive circuit are disposed in this sequence side by side along an axial direction of the drive shaft, and   the lead wire is connected to the coil located at a side of the compression mechanism by a connector.   
     
     
         11 . The motor-driven compressor according to  claim 10 ,
 wherein in the housing, a plurality of refrigerant channels that allow the refrigerant to circulate in the axial direction of the drive shaft are formed between the housing and the stator core, and   the respective refrigerant channels are equiangularly spaced from one another in a circumferential direction of the housing.   
     
     
         12 . A motor-driven compressor comprising an electric driving mechanism, a compression mechanism that is driven by the electric driving mechanism, and performs compression of a refrigerant, and a motor drive circuit for driving the electric driving mechanism,
 wherein the electric driving mechanism has a stator that is accommodated in a housing, and has a stator core and a coil provided at the stator core, a rotor rotatably provided in the stator, a drive shaft that is fixed to the rotor and drives the compression mechanism, a lead wire connected to the coil, and a cluster block for electrically connecting the lead wire to the motor drive circuit,   the housing has a main body portion in a cylindrical shape that forms a stator accommodation chamber in which the stator is accommodated in an inside thereof, a bulging portion that bulges in a radially outward direction from the main body portion, and forms a cluster block accommodation chamber in which the cluster block is accommodated in an inside thereof, and a partition wall that separates the stator accommodation chamber and the cluster block accommodation chamber in a radial direction,   the housing supports the stator core at the main body portion and the partition wall, and has the lead wire disposed across the stator accommodation chamber and the cluster block accommodation chamber,   a wall surface at a side of the stator accommodation chamber, of the partition wall is a cylindrical surface that is coaxial with the main body portion,   the cluster block is fixed to the stator core via a fitting member,   in the partition wall, a slit is formed, which allows the stator accommodation chamber and the cluster block accommodation chamber to communicate with each other, allows the fitting member to be inserted therethrough, and extends in an axial direction of the drive shaft,   in the housing, a plurality of refrigerant channels that allow the refrigerant to circulate in the axial direction of the drive shaft are formed between the housing and the stator core,   the slit and the respective refrigerant channels are equiangularly spaced from one another and are formed to have widths equal to one another in a circumferential direction of the housing,   the compression mechanism, the electric driving mechanism and the motor drive circuit are disposed in this sequence side by side along the axial direction of the drive shaft, and   the lead wire is connected to the coil located at a side of the compression mechanism.   
     
     
         13 . The motor-driven compressor according to  claim 12 ,
 wherein between the stator accommodation chamber and the cluster block accommodation chamber, an insertion path that allows the lead wire to be inserted therethrough at a side of the compression mechanism is formed,   the partition wall separates the stator accommodation chamber and the cluster block accommodation chamber except for the insertion path, and   the lead wire is connected to the coil by a connector.   
     
     
         14 . The motor-driven compressor according to  claim 1 ,
 wherein the compression mechanism, the electric driving mechanism and the motor drive circuit are disposed in this sequence side by side along an axial direction of the drive shaft, and   the lead wire is connected to the coil located at a side of the compression mechanism.