US3572052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducted refrigeration unit
Assignee: Security Pacific Business Credit Inc
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Filing: 1969-05-15
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Granted: 1971-03-23
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Expires: 1989-05-15
Abstract
Abstract The invention relates to a ducted refrigeration unit for continuously supplying quantities of refrigerated air to a group of refrigerated food display cases. The unit has two chambers arranged in parallel with a cooling coil disposed in each chamber. A liquid refrigerant is selectively and alternately supplied to one coil during the time a hot defrosting gas is supplied to the other coil. Damper means alternately direct circulating air through the chamber in which the coil thereof is supplied with a liquid refrigerant while bypassing the chamber in which the coil thereof is being defrosted.
Inventors
- 👤 Steven J Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:10
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/06; A; A47; A47F; A47F3/00; A47F3/04; A47F3/0439; A47F3/0443; F25B; F25B47/00; F25B47/02; F25B47/022; F25D21/00; F25B2347/00; F25B2347/02; F25B2347/021; F25B2400/00; F25B2400/22; F25B5/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
A ducted refrigeration unit comprising two parallel chambers having a common inlet duct and a common outlet duct, damper means for selectively channeling air through one or the other of said chambers from said inlet duct to said outlet duct, an evaporator coil in each of said chambers, each of said evaporator coils having a plurality of relatively closely spaced fins on one end thereof and a plurality of less closely spaced fins at the other end thereof, said closely spaced fins being on the downstream end of each of said evaporator coils, refrigeration apparatus for supplying a condensed liquid refrigerant and a noncondensed hot gas refrigerant, valve means for selectively and alternately controlling the supply of said liquid refrigerant and said hot gas refrigerant to said evaporators, and control means for said valve means and said damper means to selectively direct air from said inlet duct to a first one of said chambers while directing said liquid refrigerant to one of said evaporators in said first one of said chambers and hot gas refrigerant to the other of said evaporators in a second one of said chambers.
Claim 2
Dependent Claim
188 words
A ducted refrigeration unit comprising two parallel chambers having a common inlet duct and a common outlet duct, damper means for selectively channeling air through one or the other of said chambers from said inlet duct to said outlet duct, an evaporator coil in each of said chambers, each of said evaporator coils having a plurality of relatively closely spaced fins on one end thereof and a plurality of less closely spaced fins at the other end thereof, said closely spaced fins being on the downstream end of each of said evaporator coils, refrigeration apparatus for supplying a condensed liquid refrigerant and a noncondensed hot gas refrigerant, valve means for selectively and alternately controlling the supply of said liquid refrigerant and said hot gas refrigerant to said evaporators, and control means for said valve means and said damper means to selectively direct air from said inlet duct to a first one of said chambers while directing said liquid refrigerant to one of said evaporators in said first one of said chambers and hot gas refrigerant to the other of said evaporators in a second one of said chambers.
Claim 3
Dependent Claim
17 words
A ducted refrigeration unit according to claim 1 including air heating means connected to said outlet duct.
Claim 4
Dependent Claim
27 words
A ducted refrigeration unit according to claim 2 wherein said air heating means is a coil, said hot gas refrigerant being directed to flow through said coil.
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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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |