US3866439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporator with intertwined circuits
Assignee: Carrier Corp
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Filing: 1973-08-02
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Granted: 1975-02-18
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Expires: 1993-08-02
Abstract
Abstract A refrigerant evaporator having a plurality of intertwined refrigerant circuits which are connectable in alternative groups to refrigerant distributors of a refrigeration system. Under low load conditions, flow through one or more distributors is stopped to remove from service the circuits connected to those distributors and to present to the external heat exchange medium passing over the evaporator refrigerant-carrying circuits selected according to the nature of the circuit-distributor connections.
Inventors
- 👤 Rudy C Bussjager
- 👤 Jr William W Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:00
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A compression refrigeration system including condenser means, a plurality of parallel refrigerant lines for conveying condensed refrigerant from said condenser means, refrigerant distribution means in each of said parallel refrigerant lines, closing means for selectively closing at least one of said parallel refrigerant lines to refrigerant flow, and an evaporator including a plurality of parallel heat exchange fins and a plurality of intertwined refrigerant circuits running through the evaporator generally transverse to said heat exchange fins, groups of said circuits covering contiguous areas of said evaporator transverse to the direction of flow of external heat exchange medium moving over said evaporator, and said groups of circuits being connected to different ones of said refrigerant distribution means, the group of circuits connected to the distribution means in the refrigerant line including said closing means being removable from service in response to the closing of said closing means to substantially reduce heat exchange between the external heat exchange medium passing through the area covered by said latter group of circuits and the evaporator.
Claim 2
Dependent Claim
171 words
A compression refrigeration system including condenser means, a plurality of parallel refrigerant lines for conveying condensed refrigerant from said condenser means, refrigerant distribution means in each of said parallel refrigerant lines, closing means for selectively closing at least one of said parallel refrigerant lines to refrigerant flow, and an evaporator including a plurality of parallel heat exchange fins and a plurality of intertwined refrigerant circuits running through the evaporator generally transverse to said heat exchange fins, groups of said circuits covering contiguous areas of said evaporator transverse to the direction of flow of external heat exchange medium moving over said evaporator, and said groups of circuits being connected to different ones of said refrigerant distribution means, the group of circuits connected to the distribution means in the refrigerant line including said closing means being removable from service in response to the closing of said closing means to substantially reduce heat exchange between the external heat exchange medium passing through the area covered by said latter group of circuits and the evaporator.
Claim 3
Dependent Claim
162 words
A compression refrigeration system including condenser means, a plurality of parallel refrigerant lines for conveying condensed refrigerant from said condenser means, refrigerant distribution means in each of said parallel refrigerant lines, closing means for selectively closing at least one of said parallel refrigerant lines to refrigerant flow, and an evaporator including a plurality of parallel heat exchange fins and a plurality of refrigerant circuits extending through the depth of the evaporator and including connected parallel tubes running generally transverse to said heat exchange fins, groups of said circuits covering in overlapping fashion the area of said evaporator transverse to the flow of external heat exchange medium moving over said evaporator, and being connected to different ones of said distribution means, the group connected to the distribution means in the refrigerant line including said closing means being removable from service in response to the closing of said closing means to substantially reduce heat exchange between the external heat exchange medium and the evaporator.
Claim 4
Dependent Claim
162 words
A compression refrigeration system including condenser means, a plurality of parallel refrigerant lines for conveying condensed refrigerant from said condenser means, refrigerant distribution means in each of said parallel refrigerant lines, closing means for selectively closing at least one of said parallel refrigerant lines to refrigerant flow, and an evaporator including a plurality of parallel heat exchange fins and a plurality of refrigerant circuits extending through the depth of the evaporator and including connected parallel tubes running generally transverse to said heat exchange fins, groups of said circuits covering in overlapping fashion the area of said evaporator transverse to the flow of external heat exchange medium moving over said evaporator, and being connected to different ones of said distribution means, the group connected to the distribution means in the refrigerant line including said closing means being removable from service in response to the closing of said closing means to substantially reduce heat exchange between the external heat exchange medium and the evaporator.
Claim 5
Dependent Claim
16 words
A compression refrigeration system according to claim 2 wherein a plurality of said circuits are intertwined.
Claim 6
Dependent Claim
38 words
A compression refrigeration system according to claim 3 wherein the external heat exchange medium enters said evaporator at a particular side thereof, and said refrigerant circuits are arranged to discharge refrigerant from the evaporator at said particular side.
Claim 7
Dependent Claim
25 words
A compression refrigeration system according to claim 2 wherein said closing means comprises valve means for selectively closing said one refrigerant line to refrigerant flow.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |