초록 ▼

A gas burner for a gas fired heating appliance, such as a water heater. The gas burner is located within a combustion chamber and includes an inlet conduit through which combustible gas and primary air are received. An air scoop shrouds the inlet conduit and at least partially defines a flow path of

A gas burner for a gas fired heating appliance, such as a water heater. The gas burner is located within a combustion chamber and includes an inlet conduit through which combustible gas and primary air are received. An air scoop shrouds the inlet conduit and at least partially defines a flow path of primary air, substantially isolated from the combustion chamber and which extends from the inlet end of the inlet conduit to a primary air port that communicates with a source of primary air located outside the combustion chamber. The combustion chamber also includes at least one port through which secondary combustion air is admitted into the combustion chamber. A flow path transition member is located within the combustion chamber and is in fluid communication with the primary air port. The transition member also forms part of the isolated primary air flow path and sealingly engages the air scoop when the burner is installed into the combustion chamber. The transition member is provided with at least one flange that is engaged by a complementally shaped lip defined by the air scoop, as the burner is moved into its operative position through an access opening. A door or bulkhead closes off the opening through which the burner is installed and the door is adapted to mount a gas orifice through which combustible gas is discharged into the air scoop. The transition member is mounted to a base plate of the water heater and overlies a port communicating with a region below the water heater which serves as the source of primary air. The air scoop is mounted to the bulkhead/access door in a region having a predetermined profile that is unrelated to the radius of the access opening.

대표청구항 ▼

We claim: 1. A gas burner for use in a water heater, said water heater including a wall at least partially defining a combustion chamber and an access opening in said wall, comprising: a) a burner body including a lower housing and an element defining a combustion surface that is attached to said l

We claim: 1. A gas burner for use in a water heater, said water heater including a wall at least partially defining a combustion chamber and an access opening in said wall, comprising: a) a burner body including a lower housing and an element defining a combustion surface that is attached to said lower housing; b) an inlet conduit communicating with said burner body through which a gas/air mixture is delivered to said burner body in a region located below said combustion surface defining element; c) a bulkhead/access door for closing off said access opening when said burner is in its installed position within said water heater; and, d) an air scoop located in said combustion chamber shrouding said inlet conduit and at least partially defining a flow path of primary air, substantially isolated from said combustion chamber and which extends from an inlet end of said inlet conduit to a primary air port that communicates with a source of primary air located outside said combustion chamber, said bulkhead/access door secured to said air scoop; e) said air scoop having a predetermined profile and being secured to said bulkhead/access door in a region defining a mounting location on said bulkhead/access door, said region having a profile that corresponds to said air scoop profile but that is unrelated to a radius of said access opening. 2. The gas burner of claim 1 wherein said burner body, air scoop and bulkhead/access door form an integral assembly. 3. A gas fired water heating apparatus, comprising: a) structure defining a combustion chamber; b) a flue passage communicating with said combustion chamber through which products of combustion are exhausted; c) a gas burner located within said combustion chamber, said gas burner including a burner body and a combustion surface forming part of said body and an inlet conduit through which combustible gas and primary air are communicated to an interior region of said burner body, a source of combustible gas communicating with an inlet end of said inlet conduit; d) said structure defining an opening through which said burner is installed into said combustion chamber; e) an air scoop attached to said burner, said air scoop located in said combustion chamber and shrouding said inlet conduit and at least partially defining a flow path of primary air, substantially isolated from said combustion chamber; f) a primary air intake member communicating with a primary air port, said primary air port communicating with a source of primary air located outside said combustion chamber; said primary air intake member including an opening through which primary air is communicated from said primary air intake member to said air scoop; and, g) said air scoop movable through said opening and relative to said primary air intake member during installation of said burner and said air scoop overlying said opening upon installation of said air scoop such that primary air is communicated from said primary air port to said air scoop. 4. The gas fired water heating apparatus of claim 3 wherein said air intake member is slidably engageable with said air scoop when said air scoop is installed in said combustion chamber. 5. A gas fired water heater comprising: a) a combustion chamber; b) a flue passage communicating with said combustion chamber through which products of combustion are exhausted; c) a gas burner located within said combustion chamber, said gas burner including a lower housing and a combustion surface located above said lower housing; d) a venturi conduit through which combustible gas and primary air are communicated to said lower housing, said venturi conduit including a portion extending into said lower housing; e) a source of combustible gas communicating with an inlet end of said venturi conduit; f) said combustion chamber defining an opening through which said burner is installed into said combustion chamber; g) an air scoop installable in said combustion chamber through said opening and shrouding said venturi conduit and at least partially defining a flow path of primary air, substantially isolated from said combustion chamber, said air scoop engageable with a member that includes a primary air opening, said primary air opening communicating with a source of primary air located outside said combustion chamber. 6. The gas fired water heater of claim 5 wherein said combustion surface is attached to said lower housing. 7. The gas fired water heater of claim 5 wherein an end of said venturi conduit portion is cut at an angle. 8. The gas fired water heater of claim 5 wherein said air scoop overlies said opening in said member when said air scoop is installed in said combustion chamber. 9. The gas fired water heater of claim 5 wherein said lower housing is a channel-like member with at least one end cap, said portion of said venturi conduit extending through said end cap. 10. The gas fired water heater of claim 5 wherein said lower housing comprises a burner body. 11. A gas fired water heater comprising: a) a combustion chamber; b) a flue passage communicating with said combustion chamber through which products of combustion are exhausted; c) a gas burner located within said combustion chamber, said gas burner including a burner body that communicates with a combustion surface; d) a venturi conduit through which combustible gas and primary air are communicated to said burner body, said venturi conduit including a portion extending into said burner body; e) a source of combustible gas communicating with an inlet end of said venturi conduit; f) said combustion chamber defining an opening through which said burner is installed into said combustion chamber; g) a base plate defining a primary air opening that communicates with primary air outside said water heater; h) a primary air passage isolated from and located within said combustion chamber, said air passage communicating primary air from said primary air opening in said base plate to an inlet of said venturi conduit; i) at least a portion of said air passage including a member that is installed into said combustion chamber through said combustion chamber opening and connecting with another portion of said air passage. 12. The water heater of claim 11 wherein said air passage member is at least partially defined by an air scoop that shrouds said inlet of said venturi conduit. 13. The water heater of claim 11 wherein said combustion surface is attached to said burner body. 14. The water heater of claim 11 wherein said air passage is at least partially defined by a transition member that communicates with said primary air port in said base plate. 15. The water heater of claim 14 wherein said transition member communicates said primary air opening with an air scoop. 16. A gas fired water heating apparatus, comprising: a) structure defining a combustion chamber; b) a flue passage communicating with said combustion chamber through which products of combustion are exhausted; c) a gas burner located within said combustion chamber, said gas burner including a burner body and a combustion surface forming part of said body and an inlet conduit through which combustible gas and primary air are communicated to an interior region of said burner body, a source of combustible gas communicating with an inlet end of said inlet conduit; d) an air scoop attached to said burner and shrouding said inlet conduit; e) said structure defining a side opening through which said burner and attached air scoop are installed into said combustion chamber, said burner being laterally insertable through said opening and located below said flue passage and above said base and, f) said air scoop located within said combustion chamber and at least partially defining a flow path of primary air, substantially isolated from said combustion chamber, said air scoop engageable with flow path structure when said burner is removably installed into said combustion chamber and said flow path structure including a primary air port that communicates with a source of primary air located outside said combustion chamber. 17. The gas fired water heating apparatus of claim 16 further including a bulkhead/access door attached to said air scoop, said bulkhead/access door operative to close off said side opening when said burner is in its installed position within said water heat. 18. The gas fired water heating apparatus of claim 16 wherein said burner and attached air scoop together form an integral burner assembly that is installed into said combustion chamber through said side opening. 19. The gas fired water heating apparatus of claim 16 wherein said flow path structure that is engageable by said air scoop during installation of said burner, is located in a plane that is substantially orthogonal to a plane that is tangent to said side opening. 20. A gas fired heating apparatus, comprising: a) structure defining a combustion chamber; b) a flue passage communicating with said combustion chamber through which products of combustion are exhausted; c) a gas burner located within said combustion chamber, said gas burner including a burner body and a combustion surface forming part of said body and an inlet conduit through which combustible gas and primary air are communicated to an interior region of said burner body, a portion of said inlet conduit extending into said burner body, a source of combustible gas communicating with an inlet end of said inlet conduit; d) an air scoop attached to said burner to form a burner assembly, said air scoop shrouding said inlet end of said inlet conduit; e) said structure defining an opening through which said burner assembly is installed into said combustion chamber; f) said burner assembly configured such that said air scoop is engageable with flow path structure located in said combustion chamber when said burner assembly is installed into said combustion chamber, g) said air scoop and said flow path structure at least partially defining a flow path of primary air, substantially isolated from said combustion chamber, said isolated flow path of primary air extending from a primary air port to said inlet end of said inlet conduit, said primary air port communicating with a source of primary air located outside said combustion chamber. 21. The heating apparatus of claim 20 wherein said combustion chamber further includes at least one port through which secondary combustion air is admitted into said combustion chamber. 22. The heating apparatus of claim 20 wherein said structure further includes a flow path transition member located within said combustion chamber and in fluid communication with said primary air port, said transition member forming part of said isolated primary air flow path and sealingly engageable with said air scoop when said burner is positioned in said combustion chamber. 23. The apparatus of claim 22 wherein said sealing engagement between said air scoop and transition member is provided by at least one flange formed on said transition member and engaged by complementally shaped structure defined by said air scoop as said burner is moved into its operative position through said opening. 24. The heating apparatus of claim 22 wherein said transition member is mounted to a base plate of said water heater and overlies a port communicating with a region below said water heater which serves as a source of primary air. 25. The heating apparatus of claim 24 wherein said air scoop includes a lip extending outwardly along a lower edge which is engageable with a complementally shaped flange on said transition member, said lip engaging said flange as said burner is moved into its installed position within said combustion chamber. 26. The apparatus of claim 22 wherein said air scoop is secured to a bulkhead/access door in a region defining a mounting location on said bulkhead/access door, said bulkhead/access door region having a predetermined profile related to said air scoop but that is unrelated to a radius of said access opening. 27. The heating apparatus of claim 20 wherein said structure forms part of a water heater. 28. The apparatus of claim 27 further including a door for closing off said opening after installation of said burner, said door adapted to mount a gas orifice through which combustible gas is discharged within said air scoop. 29. The apparatus of claim 28 wherein a portion of said air scoop is secured to said inlet conduit by capturing a portion of said air scoop between upset ridges formed on said inlet conduit. 30. The apparatus of claim 29 further including a gasket for concurrently sealing said door and said gasket forming a portion of a seal between said transition member and said air scoop. 31. The gas fired heating apparatus of claim 20 wherein said air scoop is secured to an access door, said access door for closing off said opening when said burner is in its installed position within said combustion chamber.