Gas water heater having nitric oxide detector

Abstract

A gas water heater includes a piping disposed in a housing for receiving a fluid to be heated, a gas burner for receiving a gaseous fuel and for generating a heat to heat the fluid flowing through the piping, and a regulating device coupled to the gas burner for adjusting the supplying of the gaseous fuel to the gas burner. A nitric oxide detector is disposed in the housing for detecting the nitric oxide compounds generated by the gas burner, and a control device is coupled to the nitric oxide detector for receiving the detected signal from the nitric oxide detector and for operating the regulating device to adjust the supplying of the gaseous fuel to the gas burner and for allowing the gaseous fuel to be completely burned.

1 . A gas water heater comprising:
 a housing including a chamber formed therein, and including at least one opening formed therein and communicating with said chamber of said housing for allowing an air to flow into said chamber of said housing, and including an outlet port for allowing a combusted air or gas to flow out of said housing,   a piping disposed in said chamber of said housing for receiving a fluid to be heated by said gas water heater, said piping including an entrance for supplying the fluid into said piping and an exit for supplying a heated fluid out of said piping,   a gas burner disposed in said chamber of said housing,   a gaseous fuel supplying pipe coupled to said gas burner for supplying a gaseous fuel to said gas burner and for allowing the gaseous fuel to be burned with said gas burner in order to generate a heat and to heat the fluid flowing through said piping,   a regulating device coupled to said gas burner for adjusting a supplying of the gaseous fuel to said gas burner,   a nitric oxide detector disposed in said chamber of said housing for detecting a nitric oxide generated by said gas burner and   a control device coupled to said nitric oxide detector for receiving a detected signal from said nitric oxide detector and for processing the detected signal, said control device being coupled to said regulating device for operating said regulating device to adjust the supplying of the gaseous fuel to said gas burner and for allowing the gaseous fuel to be completely burned.   
   
   
       2 . The gas water heater as claimed in  claim 1 , wherein said regulating device is a solenoid valve. 
   
   
       3 . The gas water heater as claimed in  claim 1 , wherein said nitric oxide detector is disposed in said outlet port of said housing. 
   
   
       4 . The gas water heater as claimed in  claim 1  further comprising an electric power source coupled to said control device for supplying an electric energy to energize said control device.