Patent ID: 8616856
Filing Date: 2013-12-31
Classification: F04B,F04C

Abstract:
1. An air compressor of water injection type comprising: a compressor body including an actuation chamber to compress air in the actuation chamber, a water feed line for supplying water into the actuation chamber, an air release valve for discharging the compressed air from the actuation chamber, and a control panel for controlling the water feed line and the air release valve to select one of an on-load operation mode in which the water is supplied into the actuation chamber through the water feed line while preventing the compressed air from being discharged from the actuation chamber through the air release valve and a no-load operation mode in which the water is supplied into the actuation chamber through the water feed line while allowing the compressed air to be discharged from the actuation chamber through the air release valve, wherein the control panel is capable of controlling the water feed line and the air release valve to execute, as substitute for the no-load operation mode and the on-load operation mode, a dry operation mode in which the water is prevented from being supplied into the actuation chamber through the water feed line while allowing the compressed air to be discharged from the actuation chamber through the air release valve, wherein the control panel executes the dry operation mode before a stoppage of compression in the actuation chamber in response to a stop instruction, and wherein the control panel includes a pressure detector for measuring a pressure of the compressed air discharged from the actuation chamber, and the control panel executes in response to the stop instruction the no-load operation mode when the measured pressure is more than a predetermined threshold value, and executes the dry operation mode before preventing the compression in the actuation chamber after the measured pressure becomes not more than the predetermined threshold value.