Heat exchanger and water heater including the same
AssigneeRinnai Corporation
InventorsMasayuki Toda, Akira Kumagai, Hiromitsu Sasada
Life of this patent
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Abstract
There is provided a heat exchanger and a water heater having the heat exchanger including a uniform thickness of tin plating layer on the inner surface of a water feeding pipe. The heat exchanger H includes copper pipes 8 and 10 disposed in a casing 1 as a water feeding pipe 4 and a turbulent flow generator 13 disposed in the copper pipes 8 and 10. The turbulent flow generator 13 has a copper plating layer 14 on the surface portion thereof. The tin plating layers 17 and 18 are disposed on the inner surface of the copper pipes 8 and 10 and the surface of the turbulent flow generator 13.
Claims14
A heat exchanger comprising a casing;
- a copper pipe disposed in the casing as a water feeding pipe;
- and a turbulent flow generator disposed in the copper pipe, wherein at least a surface portion of the turbulent flow generator is made of copper-based metal and a plating layer made of tin-based metal is laminated on an inner surface of the copper pipe and the surface portion of the turbulent flow generator,
- wherein the turbulent flow generator is made of stainless-steel material and has a copper plating layer made of copper-based metal being formed directly on the surface portion thereof,
- wherein the copper plating layer is formed by electrolytic plating, and
- wherein the plating layer made of tin-based metal is formed by causing an electroless plating solution to circulate inside the copper pipe.
A water heater having a heat exchanger comprising a casing;
- a copper pipe disposed in the casing as a water feeding pipe;
- and a turbulent flow generator inserted in the copper pipe,
- wherein at least a surface portion of the turbulent flow generator is made of copper-based metal and a plating layer made of tin-based metal is laminated on an inner surface of the copper pipe and the surface portion of the turbulent flow generator,
- wherein the turbulent flow generator is made of stainless-steel material and has a copper plating layer made of copper-based metal being formed directly on the surface portion thereof,
- wherein the copper plating layer is formed by electrolytic plating, and
- wherein the plating layer made of tin-based metal is formed by causing an electroless plating solution to circulate inside the copper pipe.
Dependencies are inferred from the claim text.