Patent US3680326A successfully refreshed from Google Patents.
US3680326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating equipment for cooling a fluid
Assignee: Danfoss AS
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Filing: 1970-03-18
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Granted: 1972-08-01
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Expires: 1990-03-18
Abstract
Abstract The invention relates to refrigerating apparatus for cooling a fluid which may be either a liquid or a gas. The components include, in addition to the conventional compressor, condenser and evaporator, a pilot evaporator unit on the downstream side of the evaporator. The fluid to be cooled is passed through the drier prior to being passed through the evaporator. This has the main effect of increasing the effective capacity of the main evaporator by facilitating an optimum regulating operation.
Inventors
- 👤 Zbigniew R Huelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:04
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/34; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
Refrigerating equipment for cooling a fluid comprising, a compressor, a condenser, a main evaporator, a valve between said condenser and said evaporator for regulating the flow of refrigerant to said evaporator, a separate pilot evaporator unit, refrigerant conduit means having a first portion thereof in said main evaporator and a second portion thereof in said pilot evaporator unit, fluid conduit means having an upstream portion thereof in said pilot evaporator unit and downstream portion thereof in said main evaporator, and temperature sensing means on the downstream side of said second portion refrigerant conduit means for controlling said valve.
Claim 2
Dependent Claim
98 words
Refrigerating equipment for cooling a fluid comprising, a compressor, a condenser, a main evaporator, a valve between said condenser and said evaporator for regulating the flow of refrigerant to said evaporator, a separate pilot evaporator unit, refrigerant conduit means having a first portion thereof in said main evaporator and a second portion thereof in said pilot evaporator unit, fluid conduit means having an upstream portion thereof in said pilot evaporator unit and downstream portion thereof in said main evaporator, and temperature sensing means on the downstream side of said second portion refrigerant conduit means for controlling said valve.
Claim 3
Dependent Claim
15 words
Refrigeration equipment according to claim 1 wherein said fluid to be cooled is a liquid.
Claim 4
Dependent Claim
41 words
Refrigeration equipment according to claim 1 wherein the ratio of the length of said pilot evaporator to the area of its heat exchange surface is a multiple of the length of said evaporator to the area of its heat exchange surface.
References Cited (Backward Citations)
US2052410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |