Patent US4143702A successfully refreshed from Google Patents.
US4143702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse flow heat exchangers
Assignee: US Filter Zimpro Inc
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Filing: 1977-06-22
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Granted: 1979-03-13
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Expires: 1997-06-22
Abstract
Abstract A heat exchanger wherein the hot and cold sides are arranged in side-by-side relationship, both sides being connected to a reactor by properly valved pipes, and means providing for a forward flow with reactor influent flowing through one side to the reactor and thermally conditioned liquid exiting from the reactor through the other side. Valves are selectively operable to reverse this flow. One form of the invention utilizes a pair of heat exchangers utilizing a third heat transfer medium.
Inventors
- 👤 James W. Barr, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:08
CPC Classifications
F; F28; F28G; F28G5/00; F28G9/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
The method of descaling a heat exchanger which includes a pair of noncommunicating passages in side-by-side heat exchange relation used for thermally conditioning a liquid and there being a reactor and a valved pipe circuitry with respect to said pair of noncommunicating passages, wherein the method comprises flowing during a first period influent liquid through one of said passages where the influent liquid is heated by a reactor thermally conditioning the influent liquid within the reactor whereby the liquid is further heated and exits from the reactor as a hot effluent liquid, passing the hot effluent liquid from the reactor through the other of said passages in counter-current heat exchange relationship with said influent liquid in said one of said passages, then during a second period flowing the influent liquid through said other of said passages in the same direction as previously traversed by said hot effluent liquid, while flowing the hot effluent liquid through said one of said passages in the same direction previously traversed by said influent liquid.
Claim 2
Independent Claim
170 words
The method of descaling a heat exchanger which includes a pair of noncommunicating passages in side-by-side heat exchange relation used for thermally conditioning a liquid and there being a reactor and a valved pipe circuitry with respect to said pair of noncommunicating passages, wherein the method comprises flowing during a first period influent liquid through one of said passages where the influent liquid is heated by a reactor thermally conditioning the influent liquid within the reactor whereby the liquid is further heated and exits from the reactor as a hot effluent liquid, passing the hot effluent liquid from the reactor through the other of said passages in counter-current heat exchange relationship with said influent liquid in said one of said passages, then during a second period flowing the influent liquid through said other of said passages in the same direction as previously traversed by said hot effluent liquid, while flowing the hot effluent liquid through said one of said passages in the same direction previously traversed by said influent liquid.
Claim 3
Independent Claim
155 words
The method of descaling a heat exchanger during liquid treatment, wherein the heat exchanger includes a pair of non-communicating passages in side-by-side heat exchange relation in piped circuit with a reactor, said passages each having a pair of opposite ends, wherein the method comprises flowing during a first period influent liquid selectively to one end of one of said passages through said one passage, exiting the flow of influent liquid from the opposite end of said one of said passages into the reactor wherein the liquid undergoes thermal conditioning and exits from the reactor as a hot effluent liquid, flowing the effluent liquid through the other of said passages in countercurrent heat exchange relationship with said influent liquid in said one of said passages, and then during a second period reversing the flow of influent liquid through said one of said passages and reversing the flow of effluent liquid through the other of said passages.
Claim 4
Independent Claim
155 words
The method of descaling a heat exchanger during liquid treatment, wherein the heat exchanger includes a pair of non-communicating passages in side-by-side heat exchange relation in piped circuit with a reactor, said passages each having a pair of opposite ends, wherein the method comprises flowing during a first period influent liquid selectively to one end of one of said passages through said one passage, exiting the flow of influent liquid from the opposite end of said one of said passages into the reactor wherein the liquid undergoes thermal conditioning and exits from the reactor as a hot effluent liquid, flowing the effluent liquid through the other of said passages in countercurrent heat exchange relationship with said influent liquid in said one of said passages, and then during a second period reversing the flow of influent liquid through said one of said passages and reversing the flow of effluent liquid through the other of said passages.
Claim 5
Independent Claim
77 words
The method of descaling heat exchangers for liquid treatment including a pair of heat exchangers and a reactor, in circuit, which comprises: flowing forward reactor influent to one heat exchanger to and through the reactor and thence to and through the other heat exchanger; and interchanging the influent and effluent by passing the reactor influent through the second heat exchanger to and through the reactor and thence the effluent to and through the first named heat exchanger.
Claim 6
Independent Claim
77 words
The method of descaling heat exchangers for liquid treatment including a pair of heat exchangers and a reactor, in circuit, which comprises: flowing forward reactor influent to one heat exchanger to and through the reactor and thence to and through the other heat exchanger; and interchanging the influent and effluent by passing the reactor influent through the second heat exchanger to and through the reactor and thence the effluent to and through the first named heat exchanger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |