Patent US3681938A successfully refreshed from Google Patents.
US3681938A
Expired / Lapsed
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Absorption refrigeration apparatus of the inert gas type
Assignee: Electrolux AB
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Filing: 1971-03-09
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Granted: 1972-08-08
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Expires: 1991-03-09
Abstract
Abstract Liquid flows in the presence of an inert gas in heat transfer members, such as the evaporator and absorber, of an inert gas circuit of absorption refrigeration apparatus. The heat transfer members are formed by piping which slopes downward and is inclined at an acute angle to the horizontal and has a plurality of internal helical capillary grooves extending lengthwise of the piping. Liquid is supplied to the piping by a conduit which extends therein and terminates in a discharge opening. The discharge opening faces the upper inner surface of the piping and is at such distance therefrom that liquid outside the opening which forms at such region, due to the surface tension of the liquid, physically contacts the inner surface.
Inventors
- 👤 Peter Erik Blomberg
- 👤 Lars Sivert Enger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:52
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/10; F25B2500/00; F25B2500/01; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, b. conduit means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of longitudinal capillary grooves which are at an acute angle to the generatrix of said piping and disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, and d. said conduit means extending within said piping means and terminating in an opening from which liquid is discharged, e. the part of said conduit means disposed within said piping having the discharge opening facing the upper inner surface of said piping and at such a distance therefrom that liquid outside the opening which forms at such region, due to the surface tension of the liquid, physically contacts the inner surface.
Claim 2
Dependent Claim
176 words
In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, b. conduit means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of longitudinal capillary grooves which are at an acute angle to the generatrix of said piping and disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, and d. said conduit means extending within said piping means and terminating in an opening from which liquid is discharged, e. the part of said conduit means disposed within said piping having the discharge opening facing the upper inner surface of said piping and at such a distance therefrom that liquid outside the opening which forms at such region, due to the surface tension of the liquid, physically contacts the inner surface.
Claim 3
Dependent Claim
46 words
Apparatus as set forth in claim 1 in which the bottom of said piping is formed with an opening, said conduit means extending vertically upward into said piping through said opening and having its discharge opening closely adjacent to the upper inner surface of said piping.
Claim 4
Dependent Claim
41 words
Apparatus as set forth in claim 1 in which said conduit means is disposed within said piping and has an upwardly bent end terminating in said discharge opening which is disposed closely adjacent to the upper inner surface of said piping.
Claim 5
Dependent Claim
20 words
Apparatus as set forth in claim 3 in which said conduit means within said piping extends lengthwise of the latter.
Claim 6
Dependent Claim
79 words
Apparatus as set forth in claim 1 in which said piping is formed with an opening in a lateral side thereof, said conduit means extending horizontally into said piping through said opening, the extreme end of said conduit means within said piping having its top part cut off to form said opening from which liquid is discharged from said conduit means, the liquid at the outside of the last-mentioned opening physically contacting the upper inner surface of said piping.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |