Patent US4071082A successfully refreshed from Google Patents.
US4071082A
Expired / Lapsed
US
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Conversion of a dual duct, dual temperature air conditioning system to a single temperature system
Assignee: ECONOMIDES AND GOLDBERG
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Filing: 1975-11-17
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Granted: 1978-01-31
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Expires: 1995-11-17
Abstract
Abstract A method for converting an air conditioning system, for cooling an environment, having respective hot and cold air supply ducts and a dual duct terminal box wherein the hot and cold air is mixed to achieve a desired temperature for delivery to the environment, to a more efficient system by replacing the hot deck of the hot air duct with a cold deck similar to that of the cold air duct and replacing the dual duct box connected to both ducts with one or more types of terminal boxes capable of varying the volume of delivered cooled air to control room temperature. The variable volume terminal boxes may have either limited or unlimited volume variation capability and those with limited variation may be provided with means for heating the residual constant volume furnished at the lower limit of volume variation. The invention also provides for increasing the cooling ability of a system through the use of higher capacity terminal boxes.
Inventors
- 👤 Leander Economides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:09
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522; F24F3/0442; F24F3/0444
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
A method for converting a dual duct, dual temperature constant volume air conditioning system for increased efficiency, said system having first and second parallel ducts, means for propelling air through said ducts, means for heating the air flowing through said first duct, means for cooling the air flowing through said second duct, and terminal air delivery means connected to said first and second ducts for mixing the air in said first and second ducts in suitable proportions to deliver air to an environment which is to be maintained at a preselected temperature comprising: replacing said means for heating the air in said first duct with means for cooling the air in said first duct, replacing said means for mixing the air in said first and second ducts with terminal means for receiving the air from at least one of said first and second ducts and variably limiting the volume of said air flow to said environment, and adjusting said propelling means to reduce the maximum air flow rate in both ducts.
Claim 2
Independent Claim
171 words
A method for converting a dual duct, dual temperature constant volume air conditioning system for increased efficiency, said system having first and second parallel ducts, means for propelling air through said ducts, means for heating the air flowing through said first duct, means for cooling the air flowing through said second duct, and terminal air delivery means connected to said first and second ducts for mixing the air in said first and second ducts in suitable proportions to deliver air to an environment which is to be maintained at a preselected temperature comprising: replacing said means for heating the air in said first duct with means for cooling the air in said first duct, replacing said means for mixing the air in said first and second ducts with terminal means for receiving the air from at least one of said first and second ducts and variably limiting the volume of said air flow to said environment, and adjusting said propelling means to reduce the maximum air flow rate in both ducts.
Claim 3
Dependent Claim
29 words
A method according to claim 1 wherein replacement of said mixing means with variable volume terminal means comprises altering said mixing means to operate as variable volume terminal means.
Claim 4
Dependent Claim
76 words
A method according to claim 1 wherein said terminal air delivery means for mixing the air in said first and second ducts is responsive to means for sensing the temperature in said environment connected thereto further comprising: disconnecting said temperature sensing means from said mixing means, and connecting said temperature sensing means to said variable volume terminal receiving means for variably limiting the volume of said air flow in response to the temperature of said environment.
Claim 5
Dependent Claim
65 words
A method according to claim 3 wherein said means for cooling the air in said second duct is regulated by first additional temperature responsive means further comprising connecting said means for cooling the air in said first duct to second additional temperature responsive means, said first and second additional temperature responsive means maintaining the cooled air in said first and second ducts at similar temperatures.
Claim 6
Dependent Claim
32 words
A method according to claim 3 further comprising the step of connecting to said terminal means, means for heating the air received by said terminal means before discharge into the controlled environment.
Claim 7
Dependent Claim
28 words
A method according to claim 5 further comprising the step of connecting said heating means to said temperature sensing means for maintaining said preselected temperature of the environment.
Claim 8
Independent Claim
151 words
A method for converting a dual duct, dual temperature constant volume air conditioning system for increased cooling capacity, said system having a fan with a capacity for propelling air through first and second ducts, means for heating the air in said first duct, means for cooling the air in said second duct, and means for mixing the air in said first duct with the air in said second duct in suitable proportions to deliver to a controlled environment air of suitable temperature, comprising: replacing said means for heating the air in said first duct with means for cooling the air in said first duct, and replacing said means for mixing the air in said first and second ducts in suitable proportions to achieve a desired temperature with terminal means for receiving the air from at least one of said first and second ducts and delivering the air to the controlled environment.
Claim 9
Independent Claim
151 words
A method for converting a dual duct, dual temperature constant volume air conditioning system for increased cooling capacity, said system having a fan with a capacity for propelling air through first and second ducts, means for heating the air in said first duct, means for cooling the air in said second duct, and means for mixing the air in said first duct with the air in said second duct in suitable proportions to deliver to a controlled environment air of suitable temperature, comprising: replacing said means for heating the air in said first duct with means for cooling the air in said first duct, and replacing said means for mixing the air in said first and second ducts in suitable proportions to achieve a desired temperature with terminal means for receiving the air from at least one of said first and second ducts and delivering the air to the controlled environment.
Claim 10
Dependent Claim
27 words
A method according to claim 7 wherein replacement of said mixing means with said terminal means comprises altering said mixing means for single temperature variable volume operation.
Claim 11
Dependent Claim
17 words
A method according to claim 7 further comprising replacing said fan with another fan of greater capacity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |