Spraying device with an interchangeable cartridge

A spraying apparatus comprising:

• a spraying head further comprising:
• a fluid inlet conduit having a first end and a second end;
• a mixing conduit having a first open end in fluid communication with said second end of said fluid inlet conduit and a second open end extending through a housing;
• an aspirator passage having a first, open end in communication with said mixing conduit and a second open end extending through the bottom edge of said housing so that when a first fluid is directed to enter said first end of said fluid inlet conduit, said first fluid can draw a second fluid through said aspirator passage into said mixing conduit, and that a resulting mixed fluid is discharged through said second end of said mixing conduit into the environment, said housing sealed to permit flow only through said conduits and passage;
• and
• an interchangeable cartridge containing said second fluid therein, said cartridge further comprising:
• a cartridge housing for containing said second fluid therein, having a top end and a closed bottom end;
• a cap lid fixedly attached to said cartridge housing, said cap lid having an aspirator opening and a vent opening;
• a dip tube, open at both ends, connected to and in communication with said aspirator opening and extending downward from said cap lid nearly to said bottom end of said cartridge housing;
• an upper cap plate rotatably attached to said cap lid, said upper cap plate having an aspirator nipple and a vent nipple that align with and sealably communicate with said aspirator opening and said vent opening respectively upon rotation, said aspirator nipple sealably mateable to said aspirator passage and said vent nipple sealably mateable to a vent passage;
• and
• a means for attaching said cartridge to said sprayer head.