ELECTRIC COMPRESSOR

摘要

There is provided an electric compressor includes a compression mechanism, an electric motor, a motor housing having an injection port that communicates with one of compression chambers that is in the middle of the compression, a discharge housing having a discharge chamber into which compressed refrigerant is discharge, and an intermediate pressure housing disposed between the motor housing and the discharge housing. The intermediate pressure housing has an introduction port for introducing intermediate pressure refrigerant from an external refrigerant circuit and a communication passage between the introduction port and the injection port of the motor housing. The introduction port and the communication passage cooperate with the injection port to allow the intermediate pressure refrigerant to be injected into the compression chamber. The communication passage has in the middle thereof a muffler chamber. A partition member separates the muffler chamber and the discharge chamber.

主权项

1. An electric compressor comprising:
a compression mechanism having a plurality of compression chambers; an electric motor driving the compression mechanism to draw refrigerant into the compression chambers and compress the refrigerant in the compression chambers; a motor housing accommodating the electric motor and the compression mechanism, the motor housing having an injection port that communicates with one of the compression chambers, the compression chamber being in the middle of the compression; a discharge housing having a discharge chamber into which the compressed refrigerant is discharge; and an intermediate pressure housing disposed between the motor housing and the discharge housing, the intermediate pressure housing having an introduction port for introducing intermediate pressure refrigerant from an external refrigerant circuit and a communication passage that provides communication between the introduction port and the injection port of the motor housing, wherein the introduction port and the communication passage cooperate with the injection port to allow the intermediate pressure refrigerant to be injected into the compression chamber, wherein the communication passage has in the middle thereof a muffler chamber whose volume is large than volume of the communication passage other than the muffler chamber, wherein pressure of the intermediate pressure refrigerant is higher than pressure of the drawn refrigerant and lower than pressure of the compressed refrigerant discharged into the discharge chamber, wherein a partition member separates the muffler chamber and the discharge chamber.