US3857652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal liquid refrigerant trap for hermetic compressors
Assignee: Daikin Applied Americas Inc
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Filing: 1974-02-01
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Granted: 1974-12-31
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Expires: 1994-02-01
Abstract
Abstract A multi-cylinder hermetic compressor of the vertical crankshaft type has a liquid refrigerant return reservoir in the form of an upwardly-open, channel-shaped trough mounted on top of and in heat exchange relation with the annular discharge gas muffler, and is provided with oil bleed drain openings and with overflow notches, both located above the cylinder heads so that any liquid refrigerant passing downwardly through either the holes or the notches will spill onto the hot cylinder heads.
Inventors
- 👤 P Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:27
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/06; F04B39/12; F25; F25B; F25B31/00; F25B31/02; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
In a multi-cylinder refrigerant compressor of the vertical crankshaft type having a hermetically sealed outer shell, radially extending cylinder heads in the lower portion of the shell with discharge tubes extending upwardly to an annular discharge muffler encircling the compressor motor, a suction gas inlet in the upper portion of said shell, and an oil sump in said shell, a liquid refrigerant trap system comprising: a liquid refrigerant reservoir mounted on top of and in heat exchange relation with said muffler and being upwardly-open at least in that portion thereof underlying said suction gas inlet to receive liquid refrigerant dripping from said inlet, said reservoir extending for a distance equal to at least half a circle; said reservoir including means defining a drain opening located above at least one of said cylinder heads and toward the radially inner side of said reservoir, said drain opening being of a size to restrict passage of liquid refrigerant therethrough while permitting passage of oil therethrough.
Claim 2
Dependent Claim
162 words
In a multi-cylinder refrigerant compressor of the vertical crankshaft type having a hermetically sealed outer shell, radially extending cylinder heads in the lower portion of the shell with discharge tubes extending upwardly to an annular discharge muffler encircling the compressor motor, a suction gas inlet in the upper portion of said shell, and an oil sump in said shell, a liquid refrigerant trap system comprising: a liquid refrigerant reservoir mounted on top of and in heat exchange relation with said muffler and being upwardly-open at least in that portion thereof underlying said suction gas inlet to receive liquid refrigerant dripping from said inlet, said reservoir extending for a distance equal to at least half a circle; said reservoir including means defining a drain opening located above at least one of said cylinder heads and toward the radially inner side of said reservoir, said drain opening being of a size to restrict passage of liquid refrigerant therethrough while permitting passage of oil therethrough.
Claim 3
Dependent Claim
26 words
In a compressor according to claim 1 wherein: said reservoir comprises a channel-shaped trough overlying the entirety of said muffler, and being upwardly-open throughout its extent.
Claim 4
Dependent Claim
19 words
In a compressor according to claim 1 including: one of said drain openings located above each of said cylinders.
Claim 5
Dependent Claim
45 words
A compressor according to claim 2 wherein: the radially inner wall of said trough includes overflow notches along the upper edge thereof, said notches being located above said cylinder heads so that with an overflow of liquid refrigerant the spillage drops onto said cylinder heads.
Claim 6
Dependent Claim
42 words
In a compressor according to claim 2 including: a discharge line for carrying discharge gas from said muffler through said casing is provided, said discharge line including a vibration loop portion of curved form extending in generally nested relation in said trough.
References Cited (Backward Citations)
US3385515A
Cited
US3486687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |