Solenoid operated heated liquid spray device

A liquid spray device comprising

• a housing,
• a liquid inlet for connection to a pressurized liquid supply,
• a solenoid coil supported by said housing for connection with a power source,
• a fluid control module disposed within said solenoid coil for controlling the direction of liquid through said spray device,
• said module having an inlet portion and an outlet portion, said module outlet portion including at least one body member and a valve plunger, said plunger being axially movable relative to said body member in response to actuation of said solenoid between a first position for preventing the flow of liquid through said spray device and a second position for permitting the flow of liquid through said device for discharge as a spray, said plunger having an operating stroke established by the distance of travel between said first and second positions, a retainer securing said outlet portion in predetermined axial relation to said inlet portion, and said retainer being adjustable for selectively adjusting the axial position of said outlet portion with respect to said inlet portion and the operating stroke of said plunger as an incident to adjustable positioning of said retainer.

A liquid spraying system comprising

• a heated liquid supply for supplying liquid at a desired heated temperature;
• a spray device having a housing;
• said liquid spray device having a liquid inlet for connection to said heated liquid supply;
• a solenoid coil supported by said housing for connection to an electrical source;
• a fluid control valve mechanism disposed within said solenoid coil for controlling the flow of liquid from said liquid inlet through a discharge orifice adjacent a downstream end of said spray device,
• said spray device defining a first liquid passage for communicating liquid from said liquid inlet to said discharge orifice, said fluid control mechanism including a valve plunger movable between a first position for preventing the flow of liquid through said discharge orifice and a second position for permitting the flow of liquid from said liquid inlet through said discharge orifice and direction from said spray device, said solenoid coil being selectively operable for moving said plunger between said first and second positions, said spray device having a liquid return outlet separate from said liquid inlet for connection to said heated liquid supply, said spray device defining a second liquid passage separate from said first liquid passage and extending from a location adjacent said discharge orifice to said return outlet, and said first and said liquid passages defining part of a closed loop recirculation path with said heated liquid supply so that during periods when said plunger is in said first position said liquid is circulated through said recirculation path and substantially all of the liquid within said spray device is maintained at said desired heated temperatures.

A liquid spraying system comprising

• a heated liquid supply for supplying liquid at a desired heated temperature;
• a spray device having a housing;
• said spray device having a liquid inlet for connection to said heated liquid supply;
• a solenoid coil supported by said housing for connection to an electrical source;
• a fluid control module disposed within said solenoid coil and having a discharge orifice adjacent a downstream end thereof,
• said fluid control module being removably mountable in depending relation to said housing, said fluid control module defining a first liquid passage for communicating liquid from said liquid inlet to said discharge orifice, said fluid control module including a valve plunger movable between a first position for preventing the flow of liquid through said discharge orifice and a second position for permitting the flow of liquid from said liquid inlet through said nozzle for direction from said spray device, said solenoid coil being selectively operable for moving said plunger between said first and second positions, said spray device having a liquid return outlet separate from said liquid inlet for connection to said heated liquid supply, said fluid control module defining a second liquid passage separate from said first liquid passage and extending from a location adjacent said discharge orifice to said return outlet, and said first and said liquid passages defining part of a closed loop recirculation path with said heated liquid supply so that during periods when said plunger is in said first position liquid is circulated through said recirculation path and substantially all of the liquid within said spray device is maintained at said desired heated temperature.