US4040268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-circuited A-coil heat exchanger
Assignee: Trane US Inc
•
Filing: 1976-07-15
•
Granted: 1977-08-09
•
Expires: 1996-07-15
Abstract
Abstract The present invention provides a twin slab heat exchanger A-frame assembly having a plurality of refrigerant circuits arranged to provide a first and second circuit in each of the heat exchanger slabs. The first circuits in each heat exchanger being connected to provide the evaporator in one refrigerant system with the second circuits in each heat exchanger connected to provide the evaporator of another refrigerant circuit. The first and second circuits being arranged so that one precedes the other in air flow communication relative to air passing through the heat exchanger assembly.
Inventors
- 👤 Webster L. Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:58
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/0408; F28D1/0426; F25; F25B; F25B39/00; F25B39/02; F25B5/00; F25B2400/00; F25B2400/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
230 words
In a heat exchanger arranged in the path of a flow of air including a pair of slab heat exchangers having leading and trailing ends, said trailing ends being substantially parallel and spaced from each other to define an opening therebetween to allow movement of air therethrough, said slab heat exchangers converging toward said leading end so that substantially all of the air moving through said opening contacts and flows through both of said heat exchangers, each of said slab heat exchangers having a pair of end plates, a plurality of substantially rectangular sheet metal fins disposed in spaced parallel relation between said end plates, wherein the improvement comprises: a plurality of straight tube runs extending through aligned holes in said fins and said end plates, a plurality of return bends associated with each of said slab heat exchangers being located outwardly of said end plates connecting selected groups of adjacent straight tube runs so as to provide a first sinuous circuit in each of said slabs arranged so that one end of said first circuit is adjacent the trailing ends thereof and a second sinuous circuit arranged substantially between the first circuit and the leading ends of each of said slab heat exchangers being arranged so that substantially all of said first circuit in each heat exchanger is downstream in said air flow relative to their respective second circuit.
Claim 2
Dependent Claim
230 words
In a heat exchanger arranged in the path of a flow of air including a pair of slab heat exchangers having leading and trailing ends, said trailing ends being substantially parallel and spaced from each other to define an opening therebetween to allow movement of air therethrough, said slab heat exchangers converging toward said leading end so that substantially all of the air moving through said opening contacts and flows through both of said heat exchangers, each of said slab heat exchangers having a pair of end plates, a plurality of substantially rectangular sheet metal fins disposed in spaced parallel relation between said end plates, wherein the improvement comprises: a plurality of straight tube runs extending through aligned holes in said fins and said end plates, a plurality of return bends associated with each of said slab heat exchangers being located outwardly of said end plates connecting selected groups of adjacent straight tube runs so as to provide a first sinuous circuit in each of said slabs arranged so that one end of said first circuit is adjacent the trailing ends thereof and a second sinuous circuit arranged substantially between the first circuit and the leading ends of each of said slab heat exchangers being arranged so that substantially all of said first circuit in each heat exchanger is downstream in said air flow relative to their respective second circuit.
Claim 3
Dependent Claim
61 words
The invention defined in claim 1 wherein, conduit means connecting the first circuits of each heat exchanger to define an evaporator including an inlet and outlet connected in series in a refrigeration system; a second conduit means connecting the second circuits of each heat exchanger to define an evaporator including an inlet and outlet connected in series in another refrigeration system.
Claim 4
Dependent Claim
18 words
The invention defined in claim 2 wherein the first circuit of each heat exchanger are connected in parallel.
Claim 5
Dependent Claim
18 words
The invention defined in claim 3 wherein the second circuit of each heat exchanger are connected in parallel.
Claim 6
Dependent Claim
230 words
In a refrigeration system evaporator having portions of at least two refrigeration circuits being arranged in the path of a flow of air comprising: a pair of heat exchangers having leading and trailing ends, said trailing ends being substantially parallel and spaced from each other to define an opening therebetween to allow movement of air therethrough, said heat exchanger converging toward said leading end so that substantially all of the air moving through said opening contacts and flows through both of said heat exchangers, each of said heat exchangers having a pair of end plates, a plurality of substantially rectangular sheet metal fins disposed in spaced parallel relation between said end plates; a plurality of straight tube runs extending through aligned holes in said fins and said end plates, a plurality of return bends associated with each of said heat exchangers being located outwardly of said end plates connecting selected groups of adjacent straight tube runs so as to provide a first sinuous circuit in each heat exchanger arranged so that one end of said first circuit is adjacent the trailing ends thereof and a second sinuous circuit arranged substantially between the first circuit and the leading ends of each of said heat exchangers being arranged so that substantially all of said first circuit in each heat exchanger is downstream in said air flow relative to their respective second circuit.
Claim 7
Dependent Claim
230 words
In a refrigeration system evaporator having portions of at least two refrigeration circuits being arranged in the path of a flow of air comprising: a pair of heat exchangers having leading and trailing ends, said trailing ends being substantially parallel and spaced from each other to define an opening therebetween to allow movement of air therethrough, said heat exchanger converging toward said leading end so that substantially all of the air moving through said opening contacts and flows through both of said heat exchangers, each of said heat exchangers having a pair of end plates, a plurality of substantially rectangular sheet metal fins disposed in spaced parallel relation between said end plates; a plurality of straight tube runs extending through aligned holes in said fins and said end plates, a plurality of return bends associated with each of said heat exchangers being located outwardly of said end plates connecting selected groups of adjacent straight tube runs so as to provide a first sinuous circuit in each heat exchanger arranged so that one end of said first circuit is adjacent the trailing ends thereof and a second sinuous circuit arranged substantially between the first circuit and the leading ends of each of said heat exchangers being arranged so that substantially all of said first circuit in each heat exchanger is downstream in said air flow relative to their respective second circuit.
Claim 8
Dependent Claim
61 words
The invention defined in claim 5 wherein, conduit means connecting the first circuit of each heat exchanger to define an evaporator including an inlet and outlet connected in series in a refrigeration system; a second conduit means connecting the second circuit of each heat exchanger to define an evaporator including an inlet and outlet connected in series in another refrigeration system.
Claim 9
Dependent Claim
18 words
The invention defined in claim 6 wherein the first circuit of each heat exchanger are connected in parallel.
Claim 10
Dependent Claim
18 words
The invention defined in claim 7 wherein the second circuit of each heat exchanger are connected in parallel.
References Cited (Backward Citations)
US2332981A
Cited
US2669099A
Cited
US2857747A
Cited
US3000193A
Cited
US3105633A
Cited
US3109297A
Cited
US3866439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |