US6047556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed flow for capacity control
Assignee: Carrier Corp
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Filing: 1997-12-08
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Granted: 2000-04-11
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Expires: 2017-12-08
Abstract
Abstract Step control in capacity modulation of a refrigeration or air conditioning circuit is achieved by rapidly cycling a solenoid valve in the suction line, economizer circuit or in a bypass with the percent of "open" time for the valve regulating the rate of flow therethrough. A common port in the compressor is used for economizer flow and for bypass.
Inventors
- 👤 Alexander Lifson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
F; F25; F25B; F25B40/00; F25B40/02; F25B49/00; F25B49/02; F25B41/00; F25B41/20; F25B41/22; F25B2400/00; F25B2400/04; F25B2400/13; F25B2600/00; F25B2600/25; F25B2600/2509; F25B2600/2521
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
In a system serially including a compressor, a discharge line, a condenser, an expansion device, an evaporator and a suction line, means for achieving capacity control comprising: a solenoid valve in said suction line; means for rapidly pulsing said solenoid valve whereby the rate of flow in said suction line to said compressor is modulated; a fluid path extending from a point intermediate said condenser and said expansion device to said compressor at a location corresponding to an intermediate point of compression in said compressor; a bypass line connected to said fluid path and said suction line; a solenoid valve in said bypass line; means for rapidly pulsing said solenoid valve in said bypass line whereby the rate of flow of bypass to said suction line is modulated.
Claim 2
Dependent Claim
128 words
In a system serially including a compressor, a discharge line, a condenser, an expansion device, an evaporator and a suction line, means for achieving capacity control comprising: a solenoid valve in said suction line; means for rapidly pulsing said solenoid valve whereby the rate of flow in said suction line to said compressor is modulated; a fluid path extending from a point intermediate said condenser and said expansion device to said compressor at a location corresponding to an intermediate point of compression in said compressor; a bypass line connected to said fluid path and said suction line; a solenoid valve in said bypass line; means for rapidly pulsing said solenoid valve in said bypass line whereby the rate of flow of bypass to said suction line is modulated.
Claim 3
Dependent Claim
46 words
The capacity control of claim 1 further including; an economizer circuit connected to said fluid path; a solenoid valve in said economizer circuit; and means for rapidly pulsing said solenoid valve in said economizer circuit whereby the rate of economizer flow to said compressor is modulated.
Claim 4
Dependent Claim
123 words
In a system serially including a compressor, a discharge line, a condenser, an expansion device, an evaporator and a suction line, means for achieving capacity control comprising: a solenoid valve in said suction line; means for rapidly pulsing said solenoid valve whereby the rate of flow in said suction line to said compressor is modulated; a fluid path extending from a point intermediate said condenser and said expansion device to said compressor at a location corresponding to an intermediate point of compression in said compressor; an economizer circuit connected to said fluid path; a solenoid valve in said economizer circuit; and means for rapidly pulsing said solenoid valve in said economizer circuit whereby the rate of economizer flow to said compressor is modulated.
Claim 5
Dependent Claim
123 words
In a system serially including a compressor, a discharge line, a condenser, an expansion device, an evaporator and a suction line, means for achieving capacity control comprising: a solenoid valve in said suction line; means for rapidly pulsing said solenoid valve whereby the rate of flow in said suction line to said compressor is modulated; a fluid path extending from a point intermediate said condenser and said expansion device to said compressor at a location corresponding to an intermediate point of compression in said compressor; an economizer circuit connected to said fluid path; a solenoid valve in said economizer circuit; and means for rapidly pulsing said solenoid valve in said economizer circuit whereby the rate of economizer flow to said compressor is modulated.
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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) | 2003-04-11 | 2003-10-11 | 2004-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-11 | 2007-10-11 | 2008-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-11 | 2011-10-11 | 2012-04-11 | $7700.00 | Window Closed / Lapsed |