US3770050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing heat exchanger unit
Assignee: Kobe Steel Ltd
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Filing: 1971-07-15
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Granted: 1973-11-06
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Expires: 1991-07-15
Abstract
Abstract A reversing heat exchanger system not divided into the usual blocks and having change-over valves and check valves provided in each reversing heat exchanger unit to unify them and thereby to prevent the loss of raw air upon exchange of raw air and waste gas paths, to prevent abrupt pressure changes, to enable stable operation of a rectification system, and to standardize the change-over valves and check valves in order to facilitate easy design and manufacturing of the reversing heat exchanger system.
Inventors
- 👤 S Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
F; F25; F25J; F25J5/00; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; F28; F28F; F28F27/00; F25J2210/00; F25J2210/40; F28C; F28C1/00; F28C2001/006; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/10; Y10T; Y10T137/00; Y10T137/5544; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593; Y10T137/87153; Y10T137/87161
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
A reversing heat exchanger unit for performing a heat exchange operation between two gases, comprising: a reversing heat exchanger; a change-over valve connected to the high-temperature side of said reversing heat exchanger; a check valve connected to the low-temperature side of said reversing heat exchanger; and flow rate control valves connected to said change-over valve, wherein the change-over valve is a housing divided into two side chambers and a central chamber with a nozzle, the side chambers each having two other nozzles with one of the nozzles of each side chamber being connected to the high-temperature side of the heat exchanger, a flow path for one of said gases being formed by each of the nozzles connected to the high-temperature side of the heat exchanger and the nozzle in the central chamber, an alternate flow path for the other one of said gases being formed by each of the nozzles connected to the hightemperature side of the heat exchanger and the other nozzles in the respective side chamber, and valve means in said housing for exchanging the paths being formed therein between the nozzles, and wherein further, said flow rate control valves are connected to said other nozzles of said side chambers and said nozzle of said central chamber.
Claim 2
Dependent Claim
209 words
A reversing heat exchanger unit for performing a heat exchange operation between two gases, comprising: a reversing heat exchanger; a change-over valve connected to the high-temperature side of said reversing heat exchanger; a check valve connected to the low-temperature side of said reversing heat exchanger; and flow rate control valves connected to said change-over valve, wherein the change-over valve is a housing divided into two side chambers and a central chamber with a nozzle, the side chambers each having two other nozzles with one of the nozzles of each side chamber being connected to the high-temperature side of the heat exchanger, a flow path for one of said gases being formed by each of the nozzles connected to the high-temperature side of the heat exchanger and the nozzle in the central chamber, an alternate flow path for the other one of said gases being formed by each of the nozzles connected to the hightemperature side of the heat exchanger and the other nozzles in the respective side chamber, and valve means in said housing for exchanging the paths being formed therein between the nozzles, and wherein further, said flow rate control valves are connected to said other nozzles of said side chambers and said nozzle of said central chamber.
Claim 3
Dependent Claim
75 words
A reversing heat exchanger unit according to the claim 1, wherein said check valve is a housing having three chambers formed by a pair of spaced partition walls and opposite outer walls of said housing, each of said three chambers having a normally open port and four valve bodies positioned one each in each of said walls being movable by pressure difference between adjacent chambers and mounted symmetrically from the center of the central chamber.
Claim 4
Dependent Claim
112 words
A reversing heat exchanger unit according to claim 1 wherein said valve means in said housing of said change-over valve comprises: a pair of valve bodies mounted on a valve rod axially movable within said housing; each of said pair of valve bodies having opposing contacting surfaces for alternately opening and closing a different one of said paths formed by said nozzles connected to the high temperature side of said reversing heat exchanger and the nozzle of said central chamber and the paths formed by the same said nozzles connected to the high-temperature side of said heat exchanger and said other nozzles in the same chambers upon movement of said valve rod.
Claim 5
Dependent Claim
36 words
A reversing heat exchanger unit according to claim 3, further comprising a cylinder and a fluid pressure-operated piston connected to one end of said valve rod and slidable within said cylinder for moving said valve rod.
Claim 6
Dependent Claim
49 words
A reversing heat exchanger unit according to claim 1 wherein said flow rate control valves are respectively provided in a gathering pipe communicating with said other nozzles of said side chambers not connected to the high-temperature side of said heat exchanger and in the nozzle in said central chamber.
References Cited (Backward Citations)
US2107335A
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US2737970A
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |