US 11,732,704 B2
Air compressor
Tomohide Tsutsui, Tokyo (JP); and Teruaki Ando, Tokyo (JP)
Assigned to MAX CO., LTD., Tokyo (JP)
Filed by MAX CO., LTD., Tokyo (JP)
Filed on Mar. 22, 2021, as Appl. No. 17/208,003.
Claims priority of application No. 2020-050714 (JP), filed on Mar. 23, 2020.
Prior Publication US 2021/0293231 A1, Sep. 23, 2021
Int. Cl. F04B 41/02 (2006.01); F04B 49/02 (2006.01)
CPC F04B 41/02 (2013.01) [F04B 49/022 (2013.01); F04B 2205/05 (2013.01); F04B 2205/063 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An air compressor comprising:
a motor configured to actuate a compression mechanism to generate compressed air;
a tank part in which the compressed air generated by the compression mechanism is stored;
a pressure detector configured to detect a pressure value in the tank part; and
a controller configured to drive the motor when the pressure value in the tank part detected by the pressure detector is equal to or smaller than an ON pressure value (a pressure value for starting drive of the compression mechanism) and to stop drive of the motor when the pressure value in the tank part detected by the pressure detector is equal to or greater than an OFF pressure value (a pressure value for stopping drive of the compression mechanism),
wherein the controller is capable of executing setting change processing for detecting a continuous drive time or a continuous stop time of the motor and changing at least one of the ON pressure value, the OFF pressure value and an output of the motor, based on the continuous drive time or the continuous stop time, and
wherein the controller is configured to periodically detect a change amount of the pressure value in the tank part to provide a detected change amount of the pressure value, and based on the detected change amount of the pressure value, the controller is further configured to at least one of: (a) change a duration of an execution cycle to provide plural different execution cycle durations for the setting change processing, the plural different execution cycle durations being non-zero durations, or (b) determine an operating change amount value to change at least one of the ON pressure value, the OFF pressure value and the output of the motor, with plural operating change amount values provided corresponding to different detected change amounts of the pressure value, the plural operating change amount values being non-zero change amount values.