Hybrid Compressor

Abstract

A hybrid compressor has a first compression mechanism driven only by an external drive source; a second compression mechanism driven only by a built-in electric motor; suction paths for sucking gas to be compressed into the first compression mechanism; communication paths for sucking the gas from the first compression mechanism side into an electric motor side suction chamber; and suction passageways for sucking the gas from the electric motor side suction chamber to the second compression mechanism side. The positions and/or number of the communication paths and/or the suction passageways, and/or the positions and/or number of communication openings, which are openings of the communication paths and opened at the electric motor side suction chamber, and/or suction openings, which are openings of the suction passageways, opened at the electric motor side suction chamber, and located on a side opposite to the side of the communication openings, are limited so that, with respect to at least a part of the gas sucked into the electric motor side suction chamber via the communication paths, a gas flow is formed from the communication openings to the suction openings. In this structure, a built-in electric motor section can be appropriately cooled over a wider area by the sucked gas, so that a rise in temperature of the motor section can be properly suppressed.

1 . A hybrid compressor having a first compression mechanism driven only by an external drive source, a second compression mechanism driven only by a built-in electric motor, a suction path for sucking gas to be compressed into said first compression mechanism, a communication path for sucking the gas from said first compression mechanism side into an electric motor side suction chamber, and a suction passageway for sucking the gas from said electric motor side suction chamber to said second compression mechanism side, characterized in that positions and/or number of said communication path and/or said suction passageway, and/or positions and/or number of a communication opening, which is an opening of said communication path that is opened at said electric motor side suction chamber, and/or a suction opening, which is an opening of said suction passageway that is opened at said electric motor side suction chamber and located on a side opposite to the side of said communication opening, are limited so that, with respect to at least a part of the gas sucked into said electric motor side suction chamber via said communication path, a gas flow is formed from said communication opening to said suction opening. 
   
   
       2 . The hybrid compressor according to  claim 1 , wherein said communication opening is provided only at a position on one side in said electric motor side suction chamber, and said suction opening is provided only at a position on a side opposite to said one side in said electric motor side suction chamber. 
   
   
       3 . The hybrid compressor according to  claim 1 , wherein said communication opening, said communication path, said suction passageway and said suction opening are provided at plurality conditions, respectively. 
   
   
       4 . The hybrid compressor according to  claim 1 , wherein a center plate is provided between said electric motor side suction chamber and said second compression mechanism, and said communication opening and said suction opening are formed on said center plate. 
   
   
       5 . The hybrid compressor according to  claim 1 , wherein a fixed scroll of said first compression mechanism and a fixed scroll of said second compression mechanism are integrally formed as a common fixed scroll member, and a part of said communication path is formed on said fixed scroll member. 
   
   
       6 . The hybrid compressor according to  claim 1 , wherein said external drive source is a drive source for running a vehicle. 
   
   
       7 . The hybrid compressor according to  claim 1 , wherein said gas to be compressed is refrigerant.