IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0258130
(2008-10-24)
|
등록번호 |
US-8113154
(2012-02-14)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Michael Best & Friedrich LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
A water heater. The water heater includes a water tank adapted to contain water to be heated, a combustion chamber positioned proximate the water tank, a combustor positioned in the combustion chamber and operable to create products of combustion, a passage extending upwardly from the combustion cha
A water heater. The water heater includes a water tank adapted to contain water to be heated, a combustion chamber positioned proximate the water tank, a combustor positioned in the combustion chamber and operable to create products of combustion, a passage extending upwardly from the combustion chamber and through the water tank, the passage having an upper portion comprising an inner tube and an outer tube and a lower portion comprising an inner tube and an outer tube, and a transition element positioned in the passage and configured to direct supply air from the outer tube of the upper portion to the inner tube of the lower portion and deliver hot products of combustion from the outer tube of the lower portion to the inner tube of the upper portion, the transition element maintaining separation of the supply air and the products of combustion.
대표청구항
▼
1. A water heater comprising: a water tank adapted to contain water to be heated;a combustion chamber positioned proximate the water tank;a combustor positioned in the combustion chamber and operable to create products of combustion;a passage extending upwardly from the combustion chamber and throug
1. A water heater comprising: a water tank adapted to contain water to be heated;a combustion chamber positioned proximate the water tank;a combustor positioned in the combustion chamber and operable to create products of combustion;a passage extending upwardly from the combustion chamber and through the water tank, the passage having an upper portion comprising an inner tube and an outer tube and a lower portion comprising an inner tube and an outer tube; anda transition element positioned in the passage and configured to direct a flow of supply air from the outer tube of the upper portion to the inner tube of the lower portion and deliver a flow of hot products of combustion from the outer tube of the lower portion to the inner tube of the upper portion, the transition element maintaining separation of the flow of supply air and the flow of products of combustion. 2. The water heater of claim 1 wherein the transition element is integrally formed with the passage. 3. The water heater of claim 1 wherein the transition element further comprises a first frustoconical section having a base and an opposite narrow end, the narrow end communicating with the inner tube of the upper portion, the first section also including a first opening, the transition element further comprising a second frustoconical section having a base and an opposite narrow end, the narrow end of the second section communicating with the inner tube of the lower portion, and the base of the second section communicating with the base of the first section, the second section also including a second opening on a side opposite the first opening, and the transition element further comprising a dividing wall that extends inside the frustoconical sections and that divides the interior of the transition element into a first conduit extending between the second opening and the narrow end of the first frustoconical section and a second conduit extending between the first opening and the narrow end of the second frustoconical section, such that the first conduit delivers the flow of products of combustion from the outer tube of the lower portion to the inner tube of the upper portion, and the second conduit delivers a flow of supply air from the outer tube of the upper portion to the inner tube of the lower portion. 4. The water heater of claim 3 wherein the transition element further comprises a cylindrical section between the base of the first frustoconical section and the base of the second frustoconical section, the cylindrical section fitting tightly inside the passage so that gasses do not flow around the transition element. 5. The water heater of claim 3 wherein the transition element further comprises an upper conduit section that communicates between the narrow end of the first frustoconical section and the inner tube of the upper portion, and a lower conduit section that communicates between the narrow end of the second frustoconical section and the inner tube of the lower portion. 6. The water heater of claim 3 wherein the dividing wall is generally S-shaped in vertical cross section. 7. The water heater of claim 1 wherein the supply air in the inner tube of the lower portion is in heat exchange relation with the products of combustion in the outer tube of the lower portion, and wherein the products of combustion in the outer tube of the lower portion are in heat exchange relation with the water in the water tank. 8. A water heater comprising: a water tank adapted to contain water to be heated;a combustion chamber positioned proximate the water tank;a combustor positioned in the combustion chamber and operable to create products of combustion;a duct;a coaxial flue extending upwardly from the combustion chamber and through the water tank, the coaxial flue including an inner tube and an outer tube; anda transition element positioned between and communicating with the coaxial flue and the duct, the transition element configured to direct a flow of supply air to the inner tube of the coaxial flue and deliver a flow of products of combustion from the outer tube of the coaxial flue to the duct, the transition element maintaining separation of the flow of supply air and the flow of products of combustion. 9. The water heater of claim 8 wherein the transition element further comprises a first frustoconical section having a base and an opposite narrow end, the narrow end communicating with the duct, the first section also including a first opening, the transition element further comprising a second frustoconical section having a base and an opposite narrow end, the narrow end of the second section communicating with the inner tube of the coaxial flue, and the base of the second section communicating with the base of the first section, the second section also including a second opening on a side opposite the first opening, and the transition element further comprising a dividing wall that extends inside the frustoconical sections and that divides the interior of the transition element into a first conduit extending between the second opening and the narrow end of the first frustoconical section and a second conduit extending between the first opening and the narrow end of the second frustoconical section, such that the first conduit delivers the flow of products of combustion from the outer tube of the coaxial flue to the duct, and the second conduit delivers a flow of supply air to the inner tube of the coaxial flue. 10. The water heater of claim 9 wherein the duct further comprises an inner tube and an outer tube, such that the first conduit delivers the flow of products of combustion from the outer tube of the coaxial flue to the inner tube of the duct, and the second conduit directs a flow of supply air from the outer tube of the duct to the inner tube of the coaxial flue. 11. The water heater of claim 9 wherein the transition element further comprises a cylindrical section between the base of first frustoconical section and the base of the second frustoconical section, the cylindrical section fitting tightly inside the passage so that gasses do not flow around the transition element. 12. The water heater of claim 9 wherein the dividing wall is generally S-shaped in vertical cross section. 13. The water heater of claim 9 wherein the transition element further comprises an upper conduit section that communicates between the narrow end of the first frustoconical section and the duct, and a lower conduit section that communicates between the narrow end of the second frustoconical section and the inner tube of the coaxial flue. 14. The water heater of claim 8 wherein the supply air in the inner tube of the coaxial flue is in heat exchange relation with the products of combustion in the outer tube of the coaxial flue, and wherein the products of combustion in the outer tube of the coaxial flue are in heat exchange relation with the water in the water tank. 15. A transition element positionable within a passage of a water heater, the passage extending upwardly through a water tank from a combustion chamber and having an upper portion having an inner tube and an outer tube and a lower portion having an inner tube and an outer tube, the transition element comprising: a first frustoconical section having a base and an opposite narrow end, the narrow end communicable with the inner tube of the upper portion, the first section also including a first opening;a second frustoconical section having a base and an opposite narrow end, the narrow end of the second section communicable with the inner tube of the lower portion, and the base of the second section communicable with the base of the first section, the second section also including a second opening on a side opposite the first opening; anda dividing wall that extends inside the frustoconical sections and that divides the interior of the transition element into a first conduit extending between the second opening and the narrow end of the first frustoconical section and a second conduit extending between the first opening and the narrow end of the second frustoconical section;wherein the first conduit is configured to deliver a flow of products of combustion from the outer tube of the lower portion to the inner tube of the upper portion, and the second conduit is configured to deliver a flow of supply air from the outer tube of the upper portion to the inner tube of the lower portion. 16. The transition element of claim 15, further comprising an upper conduit section that communicates between the narrow end of the first frustoconical section and the inner tube of the upper portion, and a lower conduit section that communicates between the narrow end of the second frustoconical section and the inner tube of the lower portion. 17. The transition element of claim 15, further comprising a cylindrical section between the base of the first frustoconical section and the base of the second frustoconical section, the cylindrical section fitting tightly inside the passage so that gasses do not flow around the transition element. 18. The transition element of claim 15 wherein the dividing wall is generally S-shaped in vertical cross section.
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