Patent US5274650A successfully refreshed from Google Patents.
US4332293A
Expired / Lapsed
US
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Corrugated fin type heat exchanger
Assignee: Denso Corp
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Filing: 1980-05-29
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Granted: 1982-06-01
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Expires: 2000-05-29
Abstract
Abstract A heat exchanger has a heat exchanger core comprising a single row of parallel tubes defining therein first series of passages for a first fluid and corrugated fins disposed between and thermally connected to each adjacent pair of tubes to cooperate therewith to define a second series of passages for a second fluid. Each tube is of a generally rectangular cross-section and arranged such that the longitudinal axis of the rectangular cross-section is parallel to the direction on the flow of the second fluid through the heat exchanger. The dimension of each fin as measured in the direction of the flow of the second fluid is within the range of from 12 to 23 mm, the pitch of the corrugated fins is within the range of from 1.5 to 3.3 mm and the dimension of the longitudinal axis of the rectangular cross-section of each tube is not greater than the dimension of each fin as measured in the direction of the flow of the second fluid.
Inventors
- 👤 Michio Hiramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/126; F28F1/128; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/486
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
285 words
A corrugated fin type heat exchanger comprising a plurality of equally spaced parallel tubes arranged in a single row and defining therein a first series of passages for a first fluid and a corrugated strip defining fins disposed between and thermally connected to each pair of adjacent tubes to cooperate therewith to define a second series of passages for a second fluid, each of said tubes being of the same substantially rectangular cross-section and arranged such that the longitudinal axis of said rectangular cross-section is substantially parallel to the direction of the flow of the second fluid passing through said second series of passages, means defining an inlet chamber for the first fluid operative to distribute the first fluid to said tubes, and means defining an outlet chamber operative to gather flows of the first fluid from said tubes, characterized by: the dimension of each of said fins as measured in the direction of the flow of the second fluid is within the range of from 12 mm to 23 mm; the pitch of the corrugations of said corrugated strip defining said fins is within the range of from 1.5 mm to 3.3 mm; said fins are louvered to provide vanes and openings, said vanes of each fin being arranged in at least two successive groups in the direction of the flow of the second fluid with the vanes in each group being inclined with respect to the general plane of the corresponding fin at an angle opposite to that of the vanes of adjacent groups; the width of each vane is within the range of from 0.7 mm to 1.2 mm; and each vane is inclined at an angle of from 18° to 32°.
Claim 2
Dependent Claim
285 words
A corrugated fin type heat exchanger comprising a plurality of equally spaced parallel tubes arranged in a single row and defining therein a first series of passages for a first fluid and a corrugated strip defining fins disposed between and thermally connected to each pair of adjacent tubes to cooperate therewith to define a second series of passages for a second fluid, each of said tubes being of the same substantially rectangular cross-section and arranged such that the longitudinal axis of said rectangular cross-section is substantially parallel to the direction of the flow of the second fluid passing through said second series of passages, means defining an inlet chamber for the first fluid operative to distribute the first fluid to said tubes, and means defining an outlet chamber operative to gather flows of the first fluid from said tubes, characterized by: the dimension of each of said fins as measured in the direction of the flow of the second fluid is within the range of from 12 mm to 23 mm; the pitch of the corrugations of said corrugated strip defining said fins is within the range of from 1.5 mm to 3.3 mm; said fins are louvered to provide vanes and openings, said vanes of each fin being arranged in at least two successive groups in the direction of the flow of the second fluid with the vanes in each group being inclined with respect to the general plane of the corresponding fin at an angle opposite to that of the vanes of adjacent groups; the width of each vane is within the range of from 0.7 mm to 1.2 mm; and each vane is inclined at an angle of from 18° to 32°.
Claim 3
Dependent Claim
39 words
A heat exchanger according to claim 1 in which the dimension of each of said fins as measured in the direction of the flow of the second fluid is within the range of from 15 mm to 18 mm.
Claim 4
Dependent Claim
31 words
A heat exchanger according to claim 1 or 2 in which the pitch of the corrugations of the corrugated strip is within the range of from 1.8 mm to 2.8 mm.
Claim 5
Dependent Claim
27 words
A heat exchanger according to claim 1 or 2 in which the width of each vane is within the range of from 0.9 mm to 1.1 mm.
Claim 6
Dependent Claim
37 words
A heat exchanger according to claim 1 or 2 wherein: the width of each vane is within the range of from 0.9 mm to 1.1 mm; and each vane is inclined at an angle of about 25°.
Claim 7
Dependent Claim
347 words
A corrugated fin type heat exchanger comprising a plurality of equally spaced parallel tubes arranged in a single row and defining therein a first series of passages for a first fluid and a corrugated strip defining fins disposed between and thermally connected to each pair of adjacent tubes to cooperate therewith to define a second series of passages for a second fluid, each of said tubes being of the same substantially rectangular cross-section and arranged such that the longitudinal axis of said rectangular cross-section is substantially parallel to the direction of the flow of the second fluid passing through said second series of passages, means defining an inlet chamber for the first fluid operative to distribute the first fluid to said tubes, and means defining an outlet chamber operative to gather flows of the first fluid from said tubes, characterized by: the dimension of each of said fins as measured in the direction of the flow of the second fluid is within the range of from 12 mm to 23 mm; the pitch of the corrugations of said corrugated strip defining said fins is within the range of from 1.5 mm to 3.3 mm; the dimension of the longitudinal axis of the rectangular cross-section of each said tube is within the range of 8 mm to 23 mm but not greater than the dimension of each said fin as measured in the direction of the flow of the second fluid; the pitch of said tubes is within the range of from 8.5 mm to 14 mm; said fins are louvered to provide vanes and openings, said vanes of each fin being arranged in at least two successive groups in the direction of the flow of the second fluid with the vanes in each group being inclined with respect to the general plane of the corresponding fin at an angle opposite to that of the vanes of adjacent groups; the width of each vane is within the range of from 0.7 mm to 1.2 mm; and each vane is inclined at an angle of from 18° to 32°.
Claim 8
Dependent Claim
347 words
A corrugated fin type heat exchanger comprising a plurality of equally spaced parallel tubes arranged in a single row and defining therein a first series of passages for a first fluid and a corrugated strip defining fins disposed between and thermally connected to each pair of adjacent tubes to cooperate therewith to define a second series of passages for a second fluid, each of said tubes being of the same substantially rectangular cross-section and arranged such that the longitudinal axis of said rectangular cross-section is substantially parallel to the direction of the flow of the second fluid passing through said second series of passages, means defining an inlet chamber for the first fluid operative to distribute the first fluid to said tubes, and means defining an outlet chamber operative to gather flows of the first fluid from said tubes, characterized by: the dimension of each of said fins as measured in the direction of the flow of the second fluid is within the range of from 12 mm to 23 mm; the pitch of the corrugations of said corrugated strip defining said fins is within the range of from 1.5 mm to 3.3 mm; the dimension of the longitudinal axis of the rectangular cross-section of each said tube is within the range of 8 mm to 23 mm but not greater than the dimension of each said fin as measured in the direction of the flow of the second fluid; the pitch of said tubes is within the range of from 8.5 mm to 14 mm; said fins are louvered to provide vanes and openings, said vanes of each fin being arranged in at least two successive groups in the direction of the flow of the second fluid with the vanes in each group being inclined with respect to the general plane of the corresponding fin at an angle opposite to that of the vanes of adjacent groups; the width of each vane is within the range of from 0.7 mm to 1.2 mm; and each vane is inclined at an angle of from 18° to 32°.
Claim 9
Dependent Claim
35 words
A heat exchanger according to claim 6, wherein the dimension of each fin as measured in the direction of the flow of the second fluid is within the range from 15 mm to 18 mm.
Claim 10
Dependent Claim
33 words
A heat exchanger according to claim 6 or 7, wherein the pitch of the corrugations of the corrugated strip defining the fins is within the range of from 1.8 mm to 2.8 mm.
Claim 11
Dependent Claim
26 words
The heat exchanger defined in claim 8 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 12
Dependent Claim
26 words
A heat exchanger according to claim 6 or 7 wherein the pitch of the tubes is within the range of from 9 mm to 11 mm.
Claim 13
Dependent Claim
26 words
The heat exchanger defined in claim 10 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 14
Dependent Claim
26 words
A heat exchanger according to claim 6 or 7 wherein the width of each vane is within the range of from 0.9 mm to 1.1 mm.
Claim 15
Dependent Claim
26 words
The heat exchanger defined in claim 12 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 16
Dependent Claim
20 words
A heat exchanger according to claim 6 or 7 wherein the angle of inclination of each vane is about 25°.
Claim 17
Dependent Claim
26 words
The heat exchanger defined in claim 14 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 18
Dependent Claim
32 words
A heat exchanger according to claim 6 or 7 wherein the fins extend beyond the opposite ends of the rectangular cross-section of the corresponding tube pair a distance not over 2 mm.
Claim 19
Dependent Claim
26 words
The heat exchanger defined in claim 16 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 20
Dependent Claim
28 words
The heat exchanger defined in claim 6 or 7 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 21
Dependent Claim
76 words
A heat exchanger according to claim 6 wherein: the dimension of each fin as measured in the direction of the flow of the second fluid is within the range of from 15 mm to 18 mm; the pitch of the corrugations of the corrugated strip defining the fins is within the range of from 1.8 mm to 2.8 mm; and the pitch of the tubes is within the range of from 9 mm to 11 mm.
Claim 22
Dependent Claim
26 words
The heat exchanger defined in claim 19 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
Claim 23
Dependent Claim
24 words
A heat exchanger according to claim 19 wherein: the width of each vane is within the range of from 0.9 mm to 1.1 mm.
Claim 24
Dependent Claim
20 words
A heat exchanger according to claim 19 or 21 wherein the angle of inclination of each vane is about 25°.
Claim 25
Dependent Claim
26 words
The heat exchanger defined in claim 21 in which the dimension of the transverse axis of the rectangular cross-section of each tube is about 2 mm.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |