Patent US4611969A successfully refreshed from Google Patents.
US4611969A
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US
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Calibrating apparatus and method for a movable diffuser wall in a centrifugal compressor
Assignee: Carrier Corp
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Filing: 1985-08-19
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Granted: 1986-09-16
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Expires: 2005-08-19
Abstract
Abstract An apparatus and method is provided for initializing and calibrating a microprocessor controlled refrigeration system including a centrifugal compressor having a variable width diffuser section.
Inventors
- 👤 Thomas M. Zinsmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:34
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F04D29/464; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/143; F04D27/00; F04D27/02; F04D27/0246; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/52
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
117 words
In a method of controlling a centrifugal compressor in a refrigeration system that includes the steps of: providing a diffuser section in the compressor having a movable wall for varying of the width of the diffuser section, measuring predetermined system parameters, defining an optimum position of the movable wall at the measured system parameters, and moving the wall to the optimum position, the improvement comprising the steps of: providing a programmable device for controlling movement of the wall, determining when the position of the movable wall is unknown, causing the programmable device to move the wall to a known reference position, and calibrating the programmable device with the known position of the wall at the reference position.
Claim 2
Dependent Claim
117 words
In a method of controlling a centrifugal compressor in a refrigeration system that includes the steps of: providing a diffuser section in the compressor having a movable wall for varying of the width of the diffuser section, measuring predetermined system parameters, defining an optimum position of the movable wall at the measured system parameters, and moving the wall to the optimum position, the improvement comprising the steps of: providing a programmable device for controlling movement of the wall, determining when the position of the movable wall is unknown, causing the programmable device to move the wall to a known reference position, and calibrating the programmable device with the known position of the wall at the reference position.
Claim 3
Dependent Claim
23 words
The method of claim 1 further comprising the step of causing the calibrated programmable device to move the wall to the optimum position.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the programmable device is a microprocessor.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the step of determining is performed by the programmable device.
Claim 6
Independent Claim
74 words
A method of calibrating a programmable device programmed to move a diffuser wall member in a diffuser section of a centrifugal compressor, comprising the steps of: determining when the position of the diffuser wall member is unknown, causing the programmable device to move the diffuser wall member from the unknown position to a known reference position, and calibrating the programmable device with the known position of the diffuser wall member at the reference position.
Claim 7
Independent Claim
74 words
A method of calibrating a programmable device programmed to move a diffuser wall member in a diffuser section of a centrifugal compressor, comprising the steps of: determining when the position of the diffuser wall member is unknown, causing the programmable device to move the diffuser wall member from the unknown position to a known reference position, and calibrating the programmable device with the known position of the diffuser wall member at the reference position.
Claim 8
Dependent Claim
16 words
The method of claim 5 wherein the step of determining is performed by the programmable device.
Claim 9
Dependent Claim
12 words
The method of claim 5 wherein the programmable device is a microprocessor.
Claim 10
Dependent Claim
160 words
In a control apparatus for a centrifugal compressor including: a diffuser section having a diffuser wall movable relative to a fixed wall for varying the width therebetween, control means for positioning said diffuser wall in response to an input control signal, measuring means for monitoring predetermined system parameters and providing data output signals in response thereto, and programmable means for receiving said data output signals and providing said input control signal for moving said diffuser wall to an optimum position for the measured system parameters, the improvement comprising: means for determining when the position of said diffuser wall is unknown and generating a calibration signal in response thereto, said calibration signal being transmitted to said programmable means, said programmable means moving said diffuser wall to a known reference position in response to receiving said calibration signal and being calibrated with said diffuser wall at said known reference position, whereby said diffuser wall can be moved accurately to said optimum position.
Claim 11
Dependent Claim
160 words
In a control apparatus for a centrifugal compressor including: a diffuser section having a diffuser wall movable relative to a fixed wall for varying the width therebetween, control means for positioning said diffuser wall in response to an input control signal, measuring means for monitoring predetermined system parameters and providing data output signals in response thereto, and programmable means for receiving said data output signals and providing said input control signal for moving said diffuser wall to an optimum position for the measured system parameters, the improvement comprising: means for determining when the position of said diffuser wall is unknown and generating a calibration signal in response thereto, said calibration signal being transmitted to said programmable means, said programmable means moving said diffuser wall to a known reference position in response to receiving said calibration signal and being calibrated with said diffuser wall at said known reference position, whereby said diffuser wall can be moved accurately to said optimum position.
Claim 12
Dependent Claim
12 words
The apparatus of claim 8 wherein said programmable means is a microprocessor.
Claim 13
Dependent Claim
38 words
The apparatus of claim 8 wherein said programmable means moves said diffuser wall between a known minimum diffuser width position and a known maximum diffuser width position, said known reference position being one of said diffuser width positions.
Claim 14
Dependent Claim
26 words
The method of claim 1 wherein the known reference position is one of a known minimum diffuser width position and a known maximum diffuser width position.
Claim 15
Dependent Claim
41 words
The method of claim 5 wherein the programmable device moves the diffuser wall member between a known minimum diffuser width position and a known maximum width position, and wherein the known reference position is one of the known diffuser width postions.
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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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |