Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Yuuji Asano

Kiyoshi Kasahara

Takahiro Tachihara

Naoyuki Abe

Satoshi Hanai

Masahito Nakamura

Shiyuuichi Togasawa

Kouji Miyano

A vaporizer generates vapor by vaporizing a liquid. In particular, a vaporizer generates fuel vapor that is used for reforming fuel by vaporizing a liquid fuel that contains a hydrocarbon. This vaporizer includes a heating gas direct movement flow path along which a heating gas flows by moving directly in a horizontal direction; vaporization flow paths that are positioned such that they can exchange heat with the heating gas direct movement flow path, and that vaporizes liquid fuel; a fuel supply pipe that supplies the liquid fuel to the vaporization flow paths; and a vapor flow path that is positioned in an upstream portion on the heating gas direct movement flow path from the vaporization flow paths and that heat fuel vapor that is discharged from the vaporization flow paths. Fuel vapor that is generated on the vaporization flow paths circulates upwards in the direction of gravity along the vaporization flow paths, and subsequently is discharged from a top portion of the vaporization flow paths and is introduced into the vapor flow path. The fuel vapor then circulates in the direction of gravity along the vapor flow path.

Vaporizer that vaporizes a liquid to generate vapor

A raw fuel vaporizing apparatus comprising: a vaporizer for vaporizing liquid raw fuel; a raw fuel introducing device for introducing the liquid raw fuel into the vaporizer; a catalyst combustor into which fuel and air are supplied for catalytic combustion, the catalyst combustor generating heat in the presence of a catalyst and supplying the resulting heat to the vaporizer to vaporize the liquid raw fuel; a fuel introducing device for introducing the fuel into the catalyst combustor; an air introducing device for introducing the amount of the air suitable for catalytic combustion into the catalyst combustor; a heat transferring gas introducing device introducing heat transferring gas into the catalyst combustor to transfer heat retained by the catalyst combustor to the vaporizer; and a controller increasing the amount of the heat transferring gas through the heat transferring gas introducing device when the amount of vapor generated in the vaporizer is increased.

Raw fuel vaporizing apparatus, method of vaporizing raw fuel, and fuel cell system equipped with raw fuel vaporizing apparatus

In a fuel evaporator provided with an evaporation chamber that produces raw fuel gas FG by vaporizing raw fuel liquid by heat received from a plurality of heat medium tubes through which a high temperature heat medium passes, a raw fuel injection portion that injects raw fuel liquid onto the heat medium tubes is situated in the evaporation chamber . The heat medium tubes are arranged sparsely near the raw fuel injection portion and densely away from it. A catalytic combustor is provided adjacent to the bottom surface of the evaporation chamber to form the high temperature heat medium. Such a fuel evaporator efficiently vaporizes raw fuel liquid and can be suitably applied in a fuel cell system for a fuel cell-powered automobile.

Fuel evaporator

A fuel evaporator ( ) includes an evaporation chamber ( ) to prepare a fuel gas FG by evaporating a liquid fuel FL with heat, a fuel injector ( ) to supply a liquid fuel to the evaporation chamber, a plurality of heating medium tubes ( ) to lead a combustion gas HG through said evaporation chamber, a superheating part ( U) to heat a fuel gas FG evaporated in said evaporation chamber by means of the combustion gas HG, an exhaust duct ( ) to exhaust the fuel gas FG, and a fuel injection tube ( ). The fuel injection tube is provided with a plurality of injection holes ( ), said fuel injection tube being extended into said evaporation chamber and said fuel injection tube is provided crossing at right angle with respect to a heating medium tube. Injection property of the fuel injection tube in said evaporation chamber is greatly improved. The liquid fuel is evaporated effectively and rapidly.

A fuel evaporator raw fuel injection apparatus A includes an evaporator having an evaporating chamber in which raw fuel liquid FL is evaporated by a high temperature heating chamber (heating gas) into raw fuel gas, and which is provided with a first injection portion (fuel injection portion A) that injects the raw fuel liquid FL into the evaporating chamber , and a second injection portion (air injection portion A) that injects gas or liquid (air A) with a prescribed directional property into the raw fuel liquid FL injected from the fist injection portion (fuel injection portion A), adequately atomizes and disperses raw fuel liquid and achieves highly efficient evaporation of raw fuel liquid.

Growing community of inventors

Saitama, Japan

Yuuji Asano