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US 11,378,307 B2Granted
Hybrid condensing boiler with preheater
AssigneeEnerpro, Inc.
InventorSeyed Jafar Mirjalali
Life of this patent
Estimating the term…
Abstract
A boiler includes a tank, a gas circuit that includes a main combustion chamber in the tank and branch tubes in the tank that extend off of the main combustion chamber, and a water circuit fluidly isolated from the gas circuit. The water circuit includes a first manifold and water tubes that extend off of the first manifold. Each water tube extends through a respective one of the branch tubes, which may serve to preheat the water prior to discharge of the water into the tank.
Claims20
A boiler comprising:
- a tank configured to contain water;
- a gas circuit including,
- a U-shaped main combustion chamber in the tank with a horizontally oriented first leg, a vertically oriented turn section, and a horizontally oriented second leg positioned below the first leg,
- and branch tubes in the tank extending off of the turn section and the second leg of the main combustion chamber;
- and
- a water circuit fluidly isolated from the gas circuit and including a first manifold and water tubes extending off of the first manifold, each said water tube extending through a respective one of the branch tubes.
3 more elements
A boiler comprising:
- a tank configured to contain water;
- a gas circuit including a main combustion chamber in the tank;
- a water circuit fluidly isolated from the gas circuit and including,
- first and second manifolds outside of the tank at, respectively, first and second opposed ends of the tank,
- a first and second group of water tubes extending through the tank, each said water tube having an inlet at the first manifold and an outlet at the second manifold,
- water output tubes extending off of the second manifold and into the tank, each said water output tube having an outlet end in the tank, and
- at least one tank outlet at the top of the tank;
- wherein the main combustion chamber is positioned between the first and second group of water tubes.
5 more elements
A boiler comprising:
- a tank configured to contain water;
- a gas circuit including,
- a U-shaped main combustion chamber in the tank to transfer thermal energy to water in the tank with a horizontally oriented first leg, a vertically oriented turn section, and a horizontally oriented second leg positioned below the first leg, and
- a first and second group of branch tubes in the tank extending off opposed sides of the turn section and the second leg of the main combustion chamber to also transfer thermal energy to water in the tank;
- a water circuit fluidly isolated from the gas circuit and including,
- first and second manifolds outside of the tank at, respectively, first and second opposed ends of the tank,
- a first and second group of water tubes extending through the tank, each said water tube having an inlet at the first manifold and an outlet at the second manifold, and each of said first group of water tubes extending through a respective one of the first group of branch tubes and each of said second group of water tubes extending through a respective one of the second group of branch tubes such that the main combustion chamber is positioned between the first and second group of water tubes and such that water in the water tubes is preheated prior to being discharged into the tank;
- water output tubes extending off of the second manifold and into the tank, each said water output tube having an outlet in the tank, and
- at least one tank outlet at the top of the tank.
6 more elements
Dependencies are inferred from the claim text.