Air Compressor

Abstract

Provided is an air compressor improved in terms of reliability by taking into consideration of the condensation of the water vapor in the compressed air. According to the present invention, an air compressor includes: a compressor main body; a compression chamber of the compressor main body compressing sucked-in air; an oil supply port supplying a lubricating oil to the compression chamber; an oil separator separating compressed air discharged from the compression chamber and the lubricating oil from each other; oil temperature adjustment means adjusting temperature of the lubricating oil supplied to the oil supply port; control means controlling the oil temperature adjustment means; sucked-in air temperature detection means detecting temperature of the sucked-in air; and sucked-in air humidity detection means detecting humidity of the sucked-in air, wherein the oil temperature adjustment means is controlled on the basis of detection information of the sucked-in air temperature detection means and of the sucked-in air humidity detection means.

1 . An air compressor comprising:
 a compressor main body;   a compression chamber of the compressor main body compressing sucked-in air;   an oil supply port supplying a lubricating oil to the compression chamber;   an oil separator separating compressed air discharged from the compression chamber and the lubricating oil from each other;   oil temperature adjustment means adjusting temperature of the lubricating oil supplied to the oil supply port;   control means controlling the oil temperature adjustment means;   sucked-in air temperature detection means detecting temperature of the sucked-in air; and   sucked-in air humidity detection means detecting humidity of the sucked-in air, wherein   the control means controls the oil temperature adjustment means on the basis of detection information of the sucked-in air temperature detection means and the sucked-in air humidity detection means.   
     
     
         2 . The air compressor according to  claim 1 , wherein
 the oil temperature adjustment means is controlled such that temperature of the lubricating oil supplied to the oil supply port rises in a case where temperature of the sucked-in air detected by the sucked-in air temperature detection means is substantially fixed and humidity of the sucked-in air detected by the sucked-in air humidity detection means rises.   
     
     
         3 . The air compressor according to  claim 1 , further comprising:
 an oil cooling heat exchanger cooling the lubricating oil; and   a blower sending air to the oil cooling heat exchanger, wherein
 the oil temperature adjustment means is at least one of the compressor main body and the blower. 
   
     
     
         4 . The air compressor according to  claim 3 , further comprising:
 a flow path toward the oil cooling heat exchanger on downstream side of the oil separator; and   a bypass flow path joining the flow path after bypassing the oil cooling heat exchanger, wherein   the bypass flow path includes an oil flow rate control valve controlling flow rate of the lubricating oil.   
     
     
         5 . The air compressor according to  claim 1 , further comprising:
 oil temperature detection means detecting temperature of the lubricating oil supplied to the oil supply port, wherein   a target temperature is calculated from a lubricating oil temperature detected by the oil temperature detection means, a sucked-in air temperature detected by the sucked-in air temperature detection means, and a sucked-in air humidity detected by the sucked-in air humidity detection means; and   the oil temperature adjustment means is controlled so as to diminish a difference between the lubricating oil temperature and the target temperature.