Patent US1957982A successfully refreshed from Google Patents.
US7551983B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable air volume system including BTU control function
Assignee: Siemens Industry Inc
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Filing: 2005-04-11
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Granted: 2009-06-23
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Expires: 2025-04-11
Abstract
Abstract A method, as well as a controller, for controlling room temperature within a variable air volume system having a plurality of zones wherein the thermal transfer rate with respect to each of such zones is maintained at a substantially constant value notwithstanding changes in the temperature of the supply air thereby providing improved efficiency and environmental comfort.
Inventors
- 👤 Russell G. Attridge, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:06
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F11/46; F24F11/62; F24F11/63; F24F11/70; F24F11/72; F24F11/74; F24F3/00; F24F3/044; F24F3/0442
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
213 words
A method of improving environmental comfort in a variable air volume system having a plurality of zones, said system including a flow control box associated with each of said zones for individually regulating flow volume of supply air into each of said zones to maintain room temperature of said individual zones at or near preselected set point temperatures, said supply air being provided at a preselected temperature T, comprising the steps of: determining said flow volume of said supply air flowing through said boxes by directly measuring said flow volume at each of said boxes; and adjusting said supply air temperature to increase said flow volume through said boxes responsive to at least one of said boxes operating in a restricted flow mode whereby environmental comfort is improved; and wherein said adjusting step includes the further steps of: calculating an adjusted supply air temperature based on the thermal load in at least one of said zones; and signaling said system to reset said air supply temperature to said adjusted supply air temperature; and wherein said boxes further comprise a minimum flow volume, the minimum flow volume providing at least minimal non-zero ventilation to the zones associated with said boxes, and wherein the restricted flow mode includes flow volumes exceeding the minimum flow volume.
Claim 2
Independent Claim
213 words
A method of improving environmental comfort in a variable air volume system having a plurality of zones, said system including a flow control box associated with each of said zones for individually regulating flow volume of supply air into each of said zones to maintain room temperature of said individual zones at or near preselected set point temperatures, said supply air being provided at a preselected temperature T, comprising the steps of: determining said flow volume of said supply air flowing through said boxes by directly measuring said flow volume at each of said boxes; and adjusting said supply air temperature to increase said flow volume through said boxes responsive to at least one of said boxes operating in a restricted flow mode whereby environmental comfort is improved; and wherein said adjusting step includes the further steps of: calculating an adjusted supply air temperature based on the thermal load in at least one of said zones; and signaling said system to reset said air supply temperature to said adjusted supply air temperature; and wherein said boxes further comprise a minimum flow volume, the minimum flow volume providing at least minimal non-zero ventilation to the zones associated with said boxes, and wherein the restricted flow mode includes flow volumes exceeding the minimum flow volume.
Claim 3
Dependent Claim
26 words
The method according to claim 1 , wherein said determining step determines whether a first preselected number of boxes are operating in said restricted flow mode.
Claim 4
Dependent Claim
30 words
The method according to claim 2 , wherein said adjusting step increases/decreases said supply air temperature until a second preselected number of boxes are operating in an unrestricted flow mode.
Claim 5
Dependent Claim
38 words
The method according to claim 3 , wherein the room temperature in said zones associated with said second preselected number of boxes is less than or equal to ±2.0° F. with respect to said preselected set point temperatures.
Claim 6
Dependent Claim
38 words
The method according to claim 4 , wherein the room temperature in said zones associated with said second preselected number of boxes is less than or equal to ±1.0° F. with respect to said preselected set point temperatures.
Claim 7
Dependent Claim
25 words
The method according to claim 4 , wherein said restricted flow mode is less than or equal to 50% of a predetermined maximum flow volume.
Claim 8
Dependent Claim
25 words
The method according to claim 6 , wherein said restricted flow mode is less than or equal to 33% of a predetermined maximum flow volume.
Claim 9
Dependent Claim
42 words
The method according to claim 7 , wherein said adjusting step increases the temperature of said supply air when said system is in a cooling mode and decreases the temperature of said supply air when said system is in a heating mode.
Claim 10
Dependent Claim
34 words
The method of claim 1 wherein the restricted flow mode includes operation of said at least one box wherein said box is controlled for any flow that is less than the maximum flow volume.
Claim 11
Independent Claim
204 words
A method of improving environmental comfort in a variable air volume system having a plurality of zones, said system including a flow control box associated with each of said zones for individually regulating flow volume of supply air into each of said zones to maintain room temperature of said individual zones at or near preselected set point temperatures, said supply air being provided at a preselected temperature T, comprising the steps of: determining said flow volume of said supply air flowing through said boxes by directly measuring said flow volume at each of said boxes; and adjusting said supply air temperature to increase said flow volume through said boxes responsive to at least one of said boxes operating in a restricted flow mode whereby environmental comfort is improved, wherein said adjusting step increases the temperature of said supply air when said system is in a cooling mode and decreases the temperature of said supply air when said system is in a heating mode; and wherein said boxes further comprise a minimum flow volume, the minimum flow volume providing at least minimal non-zero ventilation to the zones associated with said boxes, and wherein the restricted flow mode includes flow volumes exceeding the minimum flow volume.
Claim 12
Independent Claim
204 words
A method of improving environmental comfort in a variable air volume system having a plurality of zones, said system including a flow control box associated with each of said zones for individually regulating flow volume of supply air into each of said zones to maintain room temperature of said individual zones at or near preselected set point temperatures, said supply air being provided at a preselected temperature T, comprising the steps of: determining said flow volume of said supply air flowing through said boxes by directly measuring said flow volume at each of said boxes; and adjusting said supply air temperature to increase said flow volume through said boxes responsive to at least one of said boxes operating in a restricted flow mode whereby environmental comfort is improved, wherein said adjusting step increases the temperature of said supply air when said system is in a cooling mode and decreases the temperature of said supply air when said system is in a heating mode; and wherein said boxes further comprise a minimum flow volume, the minimum flow volume providing at least minimal non-zero ventilation to the zones associated with said boxes, and wherein the restricted flow mode includes flow volumes exceeding the minimum flow volume.
Claim 13
Dependent Claim
26 words
The method according to claim 10 , wherein said determining step determines whether a first preselected number of boxes are operating in said restricted flow mode.
Claim 14
Dependent Claim
42 words
The method of according to claim 11 , wherein said adjusting said supply temperature comprises adjusting said supply temperature based at least in part on the determination of whether a first preselected number of boxes are operating in said restricted flow mode.
Claim 15
Dependent Claim
30 words
The method according to claim 11 , wherein said adjusting step increases/decreases said supply air temperature until a second preselected number of boxes are operating in an unrestricted flow mode.
Claim 16
Dependent Claim
25 words
The method according to claim 10 , wherein said restricted flow mode is less than or equal to 50% of a predetermined maximum flow volume.
Claim 17
Dependent Claim
25 words
The method according to claim 10 , wherein said restricted flow mode is less than or equal to 33% of a predetermined maximum flow volume.
Claim 18
Dependent Claim
42 words
The method of according to claim 2 , wherein said adjusting said supply temperature comprises adjusting said supply temperature based at least in part on the determination of whether a first preselected number of boxes are operating in said restricted flow mode.
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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) | 2012-06-22 | 2012-12-22 | 2013-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2016-06-22 | 2016-12-22 | 2017-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2020-06-22 | 2020-12-22 | 2021-06-23 | $7700.00 | Window Closed / Lapsed |