Patent US5137082A successfully refreshed from Google Patents.
US5137082A
Expired / Lapsed
US
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Plate-type refrigerant evaporator
Assignee: Denso Corp
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Filing: 1990-10-26
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Granted: 1992-08-11
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Expires: 2010-10-26
Abstract
Abstract A plate-type heat exchanger comprises a stack of flat tubes each composed of a pair of confronting core plates jointed to each other and defining a fluid passage. A cross sectional area of the fluid passage is increased along the flowing direction of the refrigerant. A plurality of ribs are disposed on the fluid passage. A flowing resistance of the ribs which are disposed near an outlet tank is lower than that of the ribs which are disposed near an inlet tank.
Inventors
- 👤 Masahiro Shimoya
- 👤 Tadashi Nakabou
- 👤 Yoshiyuki Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:27
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/044; F25; F25B; F25B39/00; F25B39/02; F25B39/022; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28D1/0325; F28D1/0333; F28D1/0341; F28F13/00; F28F13/06; F28F13/08; F28D21/00; F28D2021/0019; F28D2021/008; F28D2021/0085; Y; Y10; Y10S; Y10S165/00; Y10S165/183; Y10S165/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A plate-type refrigerant evaporator comprising: a plurality of flat tubes each formed by two core plates sealingly jointed together; each flat tube including an inlet tank portion and two outlet tank portions and defining a fluid passage therein, the inlet tanks portion being disposed on a center line of the core plate, each of two outlet tank portions being disposed at both side of the inlet tank portion; the fluid passage including a center passage and two branch passage, the center passage, the center passage being connected with the inlet tank portion and each of two branch passage being connected with each outlet tank portion in such a manner that the core plate is symmetric with respect to the center line of the core plate, and a cross sectional area of the fluid passage being increased along a flowing direction of the refrigerant; and a corrugated fin interposed between and secured to adjacent core plates of each adjacent pain of the flat tubes.
Claim 2
Dependent Claim
163 words
A plate-type refrigerant evaporator comprising: a plurality of flat tubes each formed by two core plates sealingly jointed together; each flat tube including an inlet tank portion and two outlet tank portions and defining a fluid passage therein, the inlet tanks portion being disposed on a center line of the core plate, each of two outlet tank portions being disposed at both side of the inlet tank portion; the fluid passage including a center passage and two branch passage, the center passage, the center passage being connected with the inlet tank portion and each of two branch passage being connected with each outlet tank portion in such a manner that the core plate is symmetric with respect to the center line of the core plate, and a cross sectional area of the fluid passage being increased along a flowing direction of the refrigerant; and a corrugated fin interposed between and secured to adjacent core plates of each adjacent pain of the flat tubes.
Claim 3
Dependent Claim
22 words
A plate-type refrigerant evaporator claimed in claim 1 wherein the flat tubes are successively stacked in the direction of each flat tube.
Claim 4
Dependent Claim
21 words
A plate-type refrigerant evaporator claimed in claim 1 wherein the flat tubes and the corrugated fin are made of aluminum alloy.
Claim 5
Dependent Claim
21 words
A plate-type refrigerant evaporator claimed in claim 1 wherein the flat tubes and the corrugated fins are soldered to each other.
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) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |