IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0266236
(2002-10-08)
|
우선권정보 |
JP-0311678 (2001-10-09) |
발명자
/ 주소 |
- Kawakubo, Masaaki
- Kawachi, Norihide
- Yamamoto, Ken
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
6 |
초록
▼
In a tube for a heat exchanger, a plurality of passages is defined. The passages are arranged in rows parallel to a major axis of the tube cross-section and staggered. When the tube is extruded, an extrusion material can flow around dies for forming passages and easily merge between the dies. Since
In a tube for a heat exchanger, a plurality of passages is defined. The passages are arranged in rows parallel to a major axis of the tube cross-section and staggered. When the tube is extruded, an extrusion material can flow around dies for forming passages and easily merge between the dies. Since walls between adjacent passages can be easily formed, formability of the tube is improved.
대표청구항
▼
1. A tube for a heat exchanger comprising:an extruded tube wail defining a plurality of passages extending in a longitudinal direction parallel to the tube wall, wherein the plurality of passages are arranged in at least two rows substantially parallel to a major axis of the tube cross-section and a
1. A tube for a heat exchanger comprising:an extruded tube wail defining a plurality of passages extending in a longitudinal direction parallel to the tube wall, wherein the plurality of passages are arranged in at least two rows substantially parallel to a major axis of the tube cross-section and are staggered, wherein a first line passes through midpoints of line segments which pass through the passages of a first row and a second line passes through midpoints of line segments which pass through the passages of a second row, the line segments being parallel to a minor axis of the tube cross-section, wherein the first line and the second line are offset from each other, and wherein straight lines pass between adjacent passages in the first row and adjacent passages in the second row without intersecting the passages, the straight lines extending from a first side of the tube wall to a second side of the tube wall, the first side being opposite to the second side. 2. The tube according to claim 1, wherein the passages are defined into substantially circular cross-sectional shapes.3. A tube for a heat exchanger comprising:an extruded tube wall defining a plurality of passages extending in a longitudinal direction parallel to the tube wall, wherein the plurality of passages is arranged in at least two rows substantially parallel to a major axis of the tube cross-section and is staggered; wherein the passages are defined into substantially circular cross-sectional shapes; and the passages in adjacent rows are arranged such that centerlines of the circular shapes in a first row pass between centers of the circular shapes in a second row, the centerlines being parallel to a minor axis of the tube cross-section. 4. The tube according to claim 1, wherein the passages are defined into substantially triangular cross-sectional shapes.5. The tube according to claim 4, wherein the passages in adjacent rows are arranged such that the triangular shapes in a first row are opposite to the triangular shapes in a second row in a minor direction and sides of the triangular shapes in the first row are parallel to sides of the triangular shapes in the second row.6. The tube according to claim 1, wherein the, passages are defined into substantially diamond cross-sectional shapes, wherein the passages in adjacent rows are arranged such that sides of the diamond shapes in a first row are parallel to sides of the diamond shapes in a second row.7. The tube according to claim 1, wherein the plurality of passages includes primary passages through which a primary fluid flows and secondary passages through which a secondary fluid flows to exchange heat between the primary fluid and the secondary fluid, wherein the first fluid has a pressure different from that of the secondary fluid, and wherein a total cross-sectional area of the primary passages is larger than that of the secondary passages.8. A heat exchanging device comprising a tube defining primary passages through which a primary fluid flows and secondary passages through which a secondary fluid flows, the primary fluid having a pressure different from that of the second fluid, wherein heat is exchanged between the primary fluid and the secondary fluid, and wherein the primary passages and the secondary passages are staggered in at least two rows, wherein a first line passes through midpoints of line segments which pass through the passages of a first row and a second line passes through midpoints of line segments which pass through the passages of a second row, the line segments being parallel to a minor axis of the tube cross-section, wherein the first line and the second line are offset from each other, and wherein straight lines pass between adjacent passages in the first row and adjacent passages in the second row without intersecting the passages, the straight lines extending from a first side of the tube wall to a second side of the tube wall, the first side being opposite to the second side.9. The heat exchanging device according to claim 8, wherein a total cross-sectional area of the primary passages is larger than that of the secondary passages.10. The heat exchanging device according to claim 8, wherein a cross-sectional area of each primary passage is larger than that of each secondary passage.11. The heat exchanging device according to claim 8, wherein a number of the primary passages is larger than that of the secondary passages.12. The heat exchanging device according to claim 8, wherein a length of the primary passage is shorter than that of the secondary passage.13. The heat exchanging device according to claim 8, wherein the primary fluid and secondary fluid are carbon dioxide.14. The heat exchanging device according to claim 8, wherein the tube is formed by extrusion.15. The tube according to claim 1, wherein a distance between the first line and the second line is greater than half of a cross-sectional passage dimension parallel to the minor axis.16. The tube according to claim 1, wherein the first row of passages and the second row of passages are arranged without overlapping passages with respect to a direction parallel to the major axis of the tube cross-section.17. The tube according to claim 1, wherein the passages have circular shapes and adjacent rows are arranged such that centerlines of the circular shapes in the first row pass between centers of the circular shapes in the second row, the centerlines being parallel to the minor axis of the tube cross-section.18. The tube according to claim 3, wherein the first row of passages and the second row of passages are arranged without overlapping passages with respect to a direction parallel to the major axis of the tube cross-section.19. The heat exchanging device according to claim 8, wherein the first row of passages and the second row of passages are arranged without overlapping passages with respect to a direction parallel to the major axis of the tube cross-section.20. The heat exchanging device according to claim 8, further comprising:a first header pipe defining an outer passage space through which the primary fluid flows and an inner passage space through which the secondary fluid flows; and a secondary header pipe defining an outer passage space through which the primary fluid flows and an inner passage space through which the secondary fluid flows, wherein the first header pipe and the second header pipe are connected to a first end and a second end of the tube, respectively, such that the passages in the first row communicate with the outer passage spaces and the passages in the second row communicate with the inner passage spaces. 21. A tube for a heat exchanger, comprising:an extruded tube wall defining a plurality of passages extending in a longitudinal direction parallel to the tube wall, wherein the plurality of passages are arranged in at least two rows substantially parallel to a major axis of the tube cross-section and are staggered, wherein a first line passes through midpoints of line segments which pass through the passages of a first row and a second line passes through midpoints of line segments which pass through the passages of a second row, the line segments being parallel to a minor axis of the tube cross-section, wherein the first line and the second line are offset from each other, and wherein the passages are defined into substantially circular cross-sectional shapes. 22. The tube according to claim 1, wherein a distance between the first line and the second line is greater than half of a cross-sectional passage dimension parallel to the minor axis.23. The tube according to claim 1, wherein the first row of passages and the second row of passages are arranged without overlapping passages with respect to a direction parallel to the major axis of the tube cross-section.24. The tube according to claim 1, wherein adjacent rows of the passages are arranged such that centerlines of the circular shapes in the first row pass between centers of the circular shapes in the second row, the centerlines being parallel to the minor axis of the tube cross-section.25. A tube for a heat exchanger, comprising:an extruded tube wall defining a plurality of passages extending in a longitudinal direction parallel to the tube wall, wherein the plurality of passages are arranged in at least two rows substantially parallel to a major axis of the tube cross-section and are staggered, wherein a first line passes through midpoints of line segments which pass through the passages of a first row and a second line passes through midpoints of line segments which pass through the passages of a second row, the line segments being parallel to a minor axis of the tube cross-section, wherein the first line and the second line are offset from each other, wherein the plurality of passages includes primary passages through which a primary fluid flows and secondary passages through which a secondary fluid flows to exchange heat between the primary fluid and the secondary fluid, wherein the first fluid has a pressure different from that of the secondary fluid, and wherein a total cross-sectional area of the primary passages is larger than that of the secondary passages. 26. A heat exchanging device comprising:a tube defining primary passages through which a primary fluid flows and secondary passages through which a secondary fluid flows, the primary fluid having a pressure different from that of the second fluid, wherein heat is exchanged between the primary fluid and the secondary fluid, and wherein the primary passages and the secondary passages are staggered in at least two rows, wherein a first line passes through midpoints of line segments which pass through the passages of a first row and a second line passes through midpoints of line, segments which pass through the passages of a second row, the line segments being parallel to a minor axis of the tube cross-section, wherein the first line and the second line are offset from each other; a first header pipe defining an outer passage space through which the primary fluid flows and an inner passage space through which the secondary fluid flows; and a secondary header pipe defining an outer passage space through which the primary fluid flows and an inner passage space through which the secondary fluid flows, wherein the first header pipe and the second header pipe are connected to a first end and a second end of the tube, respectively, such that the passages in the first row communicate with the outer passage spaces and the passages in the second row communicate with the inner passage spaces. 27. The heat exchanging device according to claim 26, wherein a total cross-sectional area of the primary passages is larger than that of the secondary passages.28. The heat exchanging device according to claim 26, wherein a cross-sectional area of each primary passage is larger than that of each secondary passage.29. The heat exchanging device according to claim 26, wherein a number of the primary passage is larger than that of the secondary passages.30. The heat exchanging device according to claim 26, wherein a length of primary passage is shorter than that of the secondary passage.31. The heat exchanging device according to claim 26, wherein the primary fluid and secondary fluid are carbon dioxide.32. The heat exchanging device according to claim 26, wherein the tube is formed by extrusion.33. The heat exchanging device according to claim 26, wherein the first row of passages and the second row of passages are arranged without overlapping passages with respect to a direction parallel to the major axis of the tube cross-section.
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