Patent ID: 7722345
Filing Date: 2010-05-25
Classification: F04C

Abstract:
1. A screw compressor comprising: a housing for defining therein an internal space, the housing having a suction port and a discharge port; and a pair of rotors having spiral teeth which are provided to be engaged with each other; and a rotation transmission mechanism for rotating the rotors, wherein the rotors are located in the housing to be rotatable around their rotary axes to form in the internal space a compression chamber in which gas sucked from the suction port is compressed thereby discharging the compressed gas from the discharge port, wherein the suction port is provided in the housing at a position that is radially outside of the rotors, wherein the housing is provided with a communication passage through which the suction port communicates with the compression chamber before a time when the compression chamber would otherwise be communicated with the suction port, wherein the communication passage is provided such that the gas sucked from the suction port flows into the communication passage in a direction approximately parallel with an axial direction of the rotors, wherein the housing has therein a space in which the rotation transmission mechanism is received, and wherein the space is a part of the communication passage.