Patent US3927713A successfully refreshed from Google Patents.
US3927713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy reclaiming multizone air processing system
Assignee: Lennox Industries Inc
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Filing: 1974-10-04
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Granted: 1975-12-23
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Expires: 1994-10-04
Abstract
Abstract An air processing system for an enclosure having at least two temperature zones. The system includes a multizone heating, ventilating and air conditioning unit and a control mechanism which continuously monitors the energy utilized by the hot deck energy source and the enthalpy of the outdoor air drawn into the system to determine and effect the most efficient operation of the multizone unit.
Inventors
- 👤 Theodore C Gilles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0527
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
542 words
A system for processing a volume of indoor air in an enclosure, said enclosure having at least a first and second thermal zone, said indoor air in said first and second thermal zone having a first and second zone temperature, respectively, said first zone temperature exceeding said second zone temperature, comprising, in combination: thermostatic means for sensing said first and second zone temperatures, said thermostatic means having a predetermined cooling threshold and a predetermined heating threshold; multizone air processing means for producing a first stream of cooling supply air having a first stream temperature and a second stream of heating supply air having a second stream temperature, said multizone air processing means including air heating means having a power input and air cooling means including evaporator means, compressor means and first condenser means, said air heating means and said first condenser means communicating directly with said second stream, said thermostatic means regulating said first and second air stream temperatures according to said first and second zone temperatures, respectively; outdoor air duct means for supplying a first quantity of outdoor air having an enthalpy to said multizone air processing means, said outdoor air duct means including outdoor air damper means for regulating said first quantity; return air duct means for supplying A second quantity of indoor air to said multizone air processing means, said return air duct means including return air damper means for regulating said second quantity; first means for monitoring said enthalpy of said outdoor air, said first means having a predetermined enthalpy threshold; second means for monitoring said power input to said air heating means, said second means having a predetermined power threshold; and means for controlling said multizone air processing means, said outdoor air damper means and said return air damper means in response to said thermostatic means, said first means and said second means, said outdoor air duct means and said return air duct means cooperatively defining means for supplying a quantity of intake air to said multizone air processing means, said intake air being a mixture of outdoor and return air and having a predetermined intake temperature, said controlling means being operable in a first state whenever said first zone temperature exceeds said cooling threshold and said enthalpy exceeds said enthalpy threshold, a second state whenever said first zone temperature exceeds said cooling threshold and said power input exceeds said power threshold, and at least a third state whenever said first zone temperature exceeds said cooling threshold, said enthalpy threshold exceeds said enthalpy and said power threshold exceeds said power input, said air cooling means, said outdoor air damper means and said indoor air damper means being operative, closed and open, respectively, in said first state, said air heating means cooperating with said first condenser means in said first state to process said second stream, said air cooling means, said outdoor air damper means and said return air damper means being operative, closed and open, respectively, in said second state, said air heating means cooperating with said condenser means in said second state to process said second stream, said air cooling means, outdoor air damper means, return air damper means and air heating means bieng inoperative, variably open, variably open and operative, respectively, in said third state.
Claim 2
Independent Claim
542 words
A system for processing a volume of indoor air in an enclosure, said enclosure having at least a first and second thermal zone, said indoor air in said first and second thermal zone having a first and second zone temperature, respectively, said first zone temperature exceeding said second zone temperature, comprising, in combination: thermostatic means for sensing said first and second zone temperatures, said thermostatic means having a predetermined cooling threshold and a predetermined heating threshold; multizone air processing means for producing a first stream of cooling supply air having a first stream temperature and a second stream of heating supply air having a second stream temperature, said multizone air processing means including air heating means having a power input and air cooling means including evaporator means, compressor means and first condenser means, said air heating means and said first condenser means communicating directly with said second stream, said thermostatic means regulating said first and second air stream temperatures according to said first and second zone temperatures, respectively; outdoor air duct means for supplying a first quantity of outdoor air having an enthalpy to said multizone air processing means, said outdoor air duct means including outdoor air damper means for regulating said first quantity; return air duct means for supplying A second quantity of indoor air to said multizone air processing means, said return air duct means including return air damper means for regulating said second quantity; first means for monitoring said enthalpy of said outdoor air, said first means having a predetermined enthalpy threshold; second means for monitoring said power input to said air heating means, said second means having a predetermined power threshold; and means for controlling said multizone air processing means, said outdoor air damper means and said return air damper means in response to said thermostatic means, said first means and said second means, said outdoor air duct means and said return air duct means cooperatively defining means for supplying a quantity of intake air to said multizone air processing means, said intake air being a mixture of outdoor and return air and having a predetermined intake temperature, said controlling means being operable in a first state whenever said first zone temperature exceeds said cooling threshold and said enthalpy exceeds said enthalpy threshold, a second state whenever said first zone temperature exceeds said cooling threshold and said power input exceeds said power threshold, and at least a third state whenever said first zone temperature exceeds said cooling threshold, said enthalpy threshold exceeds said enthalpy and said power threshold exceeds said power input, said air cooling means, said outdoor air damper means and said indoor air damper means being operative, closed and open, respectively, in said first state, said air heating means cooperating with said first condenser means in said first state to process said second stream, said air cooling means, said outdoor air damper means and said return air damper means being operative, closed and open, respectively, in said second state, said air heating means cooperating with said condenser means in said second state to process said second stream, said air cooling means, outdoor air damper means, return air damper means and air heating means bieng inoperative, variably open, variably open and operative, respectively, in said third state.
Claim 3
Dependent Claim
30 words
A system as claimed in claim 1 wherein said enclosure includes a third zone having a third zone temperature, said third zone temperature interposing said first and second zone temperatures.
Claim 4
Dependent Claim
52 words
A system as claimed in claim 1 wherein said controlling means further includes relay means for maintaining said controlling means in said second state whenever said power input drops below said power threshold until said second zone temperature substantially equals said heating threshold substantially avoiding excess cycling of said air cooling means.
Claim 5
Dependent Claim
23 words
A system as claimed in claim 1 wherein said evaporating means directly communicates with said first stream in said multizone air processing means.
Claim 6
Dependent Claim
18 words
A system as claimed in claim 1 wherein said air cooling means has a minimum operational power input.
Claim 7
Dependent Claim
20 words
A system as claimed in claim 5 wherein said minimum operational power input and said power threshold are substantially equal.
Claim 8
Dependent Claim
47 words
A system as claimed in claim 1 wherein said air cooling means includes a second condenser means and expansion valve means interposing said first and second condenser means, said second condenser means and said expansion valve means cooperating to define means for de-activating said first condenser means.
Claim 9
Dependent Claim
67 words
A system as claimed in claim 7 wherein said controlling means is operable in a fourth state whenever said air cooling means is operative and said second zone temperature exceeds said heating threshold and a fifith state whenever said air cooling means is operable and said heating threshold exceeds said second zone temperature, said de-activating means being operative and inoperative, respectively, in said fourth and fifth states.
Claim 10
Dependent Claim
32 words
A system as claimed in claim 7 wherein said multizone air processing means includes supply air duct means for directing said first and second streams to said first and second Zones, respectively.
Claim 11
Dependent Claim
47 words
A system as claimed in claim 9 wherein said supply air duct means further includes supply air damper means for mixing said first and second streams to produce a third stream of supply air, said supply air duct means directing said third stream to said third zone.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |