Digit button-operated air compressor output control structure

Abstract

A digit button-operated air compressor output control structure for controlling output of compressed air from an air compressor by means of a digital control panel and an air pressure regulating structure with internal pressure sensors for enabling the user to set the desired output air pressure quickly and to control the output air pressure stably.

1 . A digit button-operated air compressor output control structure for controlling output of compressed air from an air compressor, comprising:
 a main body fixedly fastened to said air compressor, said main body comprising an air inlet connected to said air compressor for guiding in compressed air from said air compressor, an air outlet for guiding out compressed air, a main air chamber, a first air passage in communication between said air inlet and said main air chamber, and a second air passage in communication between said air inlet and said main air chamber;   an exhaust valve movable in said main air chamber and dividing said main air chamber into a first air chamber and a second air chamber, said first air chamber being in communication with said first air passage and said air outlet, said second air chamber being in communication with said second air passage;   an intake valve assembly mounted in said second air passage and adapted to regulate the flow rate of compressed air from said air compressor into said second air chamber;   a first pressure sensor mounted in said second air passage between said air inlet and said intake valve assembly and adapted to detect the air pressure in said second air passage and to output a first signal indicative of the detected air pressure;   a second pressure sensor mounted in between said intake valve assembly and said second air chamber and adapted to detect the air pressure in between said intake valve assembly and said second air chamber and to output a second signal indicative of the detected air pressure; and   a control panel, said control panel comprising a circuit board electrically connected to said intake valve assembly and said first pressure sensor and said second pressure sensor and adapted to convert said first signal from said first pressure sensor and said second signal from said second pressure sensor into respective digital signals for display through display screen means, a set of digit control keys installed in one side of said circuit board and electrically connected to said circuit board for setting the control of said intake valve assembly in regulating the flow rate of compressed air from said air compressor into said second receiving chamber, and display screen means electrically connected to said circuit board for displaying the digital signals produced by said circuit board.   
   
   
       2 . The digit button-operated air compressor output control structure as claimed in  claim 1 , wherein said main body comprises a connecting member and a flow guide, said connecting member comprising said air inlet, said air outlet, said first air passage, a sub air passage in communication with said first air passage, a first side, a first groove formed on said first side to accommodate said exhaust valve and to define with said exhaust valve said first receiving chamber, said flow guide being fixedly connected to the first side of said connecting member said flow guide, said flow guide comprising a second groove, which accommodates said exhaust valve and defines with said exhaust valve said second receiving chamber, a third groove, a front air passage in communication with said sub air passage and said third groove, an opening on one side of said second groove; said intake valve assembly is mounted in said third groove and one side of said opening, comprising a middle air passage in communication with said third groove and said opening, said middle air passage forming with said sub air passage and said front air passage said second air passage; said control panel is fixedly connected to said flow guide; said first pressure sensor is mounted in said third groove; said second pressure sensor is mounted in said second groove. 
   
   
       3 . The digit button-operated air compressor output control structure as claimed in  claim 2 , wherein said exhaust valve comprises:
 a valve plunger mounted in said first groove to separate said first receiving chamber and said second receiving chamber, said plunger having a pin inserted into said first receiving chamber;   a valve sleeve fixedly connected to said connecting member of said main body, said valve sleeve having an axial hole for receiving the pin of said valve plunger and an exhaust air passage in communication between said first receiving chamber and said air outlet;   a valve plug inserted into the axial hole of said valve sleeve and adapted to block said exhaust air passage and movable by said pin of said valve plunger to open said exhaust air passage; and   an elastic member stopped between an inside wall of said connecting member and one end of said valve plug to support said valve plug in the position where said valve plug blocks said exhaust air passage.   
   
   
       4 . The digit button-operated air compressor output control structure as claimed in  claim 2 , wherein said intake valve assembly comprises:
 a valve holder fixedly connected to said flow guide, said valve holder comprising a first chamber, a first through hole in communication with said first chamber and said third groove, a second through hole in communication with said first chamber and said opening of said main body, said first chamber forming with said first through hole and said second through hole said middle air passage; and   a first regulating valve installed in said valve holder and electrically connected to said circuit board, said first regulating valve having a first stop member controllable by said circuit board to move in said first chamber.   
   
   
       5 . The digit button-operated air compressor output control structure as claimed in  claim 4 , wherein said valve holder of said intake valve assembly further comprises a second chamber, a third through hole in communication with said opening of said main body and said second chamber, a fourth through hole in communication with said second chamber and the outside space; said intake valve assembly further comprises a second regulating valve installed ins aid valve holder and electrically connected to said circuit board, said second regulating valve having a second stop member controllable by said circuit board to move in said second chamber. 
   
   
       6 . The digit button-operated air compressor output control structure as claimed in  claim 1 , wherein said control panel further comprises a touch panel installed in the side of said circuit board carrying said digit control keys, said touch panel comprising a window corresponding to said display screen means, and a set of digits corresponding to said digit control keys. 
   
   
       7 . The digit button-operated air compressor output control structure as claimed in  claim 1 , further comprising a battery electrically connected to said circuit board.