Heat exchanger
AssigneeM. Technique Co., Ltd.
InventorMasakazu Enomura
Life of this patent
Estimating the term…
Abstract
A heat exchanger includes three flow paths, a first flow path, a second flow path, and a third flow path, which turn spirally in the space formed between an inner cylinder and an outer cylinder are provided. These flow paths are defined by an inner heat transfer body and an outer heat transfer body, and heat exchange is performed through the heat transfer bodies. The heat transfer bodies turn spirally, have a screw shape in an axial cross-sectional view, and are assembled into a screw shape. The flow path area of the first flow path is varied by changing the shapes of a male thread and a female thread, and the second flow path and the third flow path are formed in a spiral shape, allowing for exchange of heat through the heat transfer bodies.
Claims17
A heat exchanger comprising:
- an inner tube and an outer tube concentric with the inner tube;
- a first flow path, a second flow path, and a third flow path, each of which spirally circulates in a space formed between the inner tube and the outer tube,
- wherein the second flow path is formed between the inner tube and the first flow path and has an inlet and an outlet, the outlet formed between the inner tube and the first flow path,
- wherein the second flow path is closed between the inner tube and the first flow path,
- wherein a heat exchange is performed between a fluid to be processed, which is a first fluid flowing through the first flow path, and a second fluid and a third fluid flowing through the second flow path and the third fluid path via a heat transfer body, and
- wherein the heat transfer body is arranged in a gap formed between the inner tube and the outer tube while spirally circulating, and a cross sectional shape of the heat transfer body in an axial-direction cross sectional view is a thread shape, and is assembled into a thread shape;
- by changing shapes of an external thread portion and an internal thread portion, a flow path area of the first flow path is changed, and the second flow path and the third flow path are spirally formed;
- then the heat exchange is performed via the heat transfer body.
A heat exchanger comprising:
- a cylindrical inner heat transfer body forming an external thread portion having a first crest angle, a cylindrical outer heat transfer body forming an internal thread portion having a second crest angle;
- a space between the inner heat transfer body and the outer heat transfer body forming a first flow path through which a first fluid flows;
- a second flow path provided in an inner side of the inner heat transfer body and a third flow path provided in an outer side of the outer heat transfer body;
- a heat exchange is performed between a second fluid flowing through the second flow path and the first fluid via the inner heat transfer body;
- and
- a heat exchange is performed between a third fluid flowing through the third flow path and the first fluid via the outer heat transfer body,
- wherein the first flow path spirally circulates,
- wherein the first crest angle is different than the second crest angle,
- wherein a ratio (α/β) of a maximum flow path width (α) of the first flow path to a minimum flow path width (β) of the first flow path in a radial direction is 2 or more.
Dependencies are inferred from the claim text.