US6491094B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for a heating ventilating and air conditioning unit
Assignee: York International Corp
•
Filing: 2001-02-06
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Granted: 2002-12-10
•
Expires: 2021-02-06
Abstract
Abstract A control system for a heating, ventilating, and air conditioning unit having a heating stage, a cooling stage, and an economizer is provided. The system includes a memory configured to store a first predetermined temperature range and a second predetermined temperature range. The system also includes a control having an input device configured to receive an indoor air temperature representative of the air in one or more zones and a supply air temperature representative of the air entering the one or more zones. The control selectively activates at least one of the heating stage, the cooling stage, and the economizer when the indoor air temperature is outside of the first predetermined temperature range. The control also selectively activates at least one of the heating stage, the cooling stage, and the economizer when the indoor air temperature is within the first predetermined temperature range and the sensed temperature of the supply air is outside of the second predetermined temperature range.
Inventors
- 👤 Ronald R. Rayburn
- 👤 Neil A. Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F11/00; F24F11/30; F24F11/62; F24F11/70; F24F11/72; F24F11/74; F24F11/76; F24F11/80; F24F11/81; F24F11/83; F24F11/84; F24F11/86; F24F2110/00; F24F2110/10; F24F2110/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
193 words
A control system for a heating, ventilating, and air conditioning unit having a heating stage, a cooling stage, and an economizer configured to provide outdoor air to the conditioning unit, the control system comprising: a memory means for storing a first predetermined temperature range and a second predetermined temperature range; and a control means for receiving an indoor air temperature representative of the air in one or more zones and a supply air temperature representative of the air entering the one or more zones, the control means selectively operating the conditioning unit in a conditioning mode by activating at least one of the heating stage, the cooling stage, and the economizer when the indoor air temperature is outside of the first predetermined temperature range, the control means selectively operating the conditioning unit in a ventilation mode when the indoor air temperature is within the first predetermined temperature range, and the control means selectively activating at least one of the heating stage, the cooling stage, and the economizer when the conditioning unit is operating in the ventilation mode and the sensed temperature of the supply air is outside of the second predetermined temperature range.
Claim 2
Dependent Claim
193 words
A control system for a heating, ventilating, and air conditioning unit having a heating stage, a cooling stage, and an economizer configured to provide outdoor air to the conditioning unit, the control system comprising: a memory means for storing a first predetermined temperature range and a second predetermined temperature range; and a control means for receiving an indoor air temperature representative of the air in one or more zones and a supply air temperature representative of the air entering the one or more zones, the control means selectively operating the conditioning unit in a conditioning mode by activating at least one of the heating stage, the cooling stage, and the economizer when the indoor air temperature is outside of the first predetermined temperature range, the control means selectively operating the conditioning unit in a ventilation mode when the indoor air temperature is within the first predetermined temperature range, and the control means selectively activating at least one of the heating stage, the cooling stage, and the economizer when the conditioning unit is operating in the ventilation mode and the sensed temperature of the supply air is outside of the second predetermined temperature range.
Claim 3
Dependent Claim
25 words
The system of claim 1 , further comprising one or more thermostats, one of said thermostats disposed in each of the one or more zones.
Claim 4
Dependent Claim
28 words
The system of claim 2 , wherein each thermostat is programmable and configured to receive an upper setpoint and a lower setpoint for the first predetermined temperature range.
Claim 5
Dependent Claim
36 words
The system of claim 3 , wherein the control means activates the heating stage when the conditioning unit is operating in the ventilation mode and the supply air temperature is below the second predetermined temperature range.
Claim 6
Dependent Claim
36 words
The system of claim 3 , wherein the control means activates the cooling stage when the conditioning unit is operating in the ventilation mode and the supply air temperature is above the second predetermined temperature range.
Claim 7
Dependent Claim
26 words
The system of claim 3 , wherein each thermostat is configured to receive an upper setpoint and a lower setpoint for the second predetermined temperature range.
Claim 8
Dependent Claim
20 words
The system of claim 6 , wherein the control means receives an outdoor air temperature representative of the outdoor air.
Claim 9
Dependent Claim
66 words
The system of claim 7 , wherein the control means selectively modulates the economizer to increase the amount of outdoor air supplied to the conditioning unit when the conditioning unit is operating in the ventilation mode, the supply air temperature is above the upper setpoint of the second predetermined temperature range, and the outdoor air is below the upper setpoint of the second predetermined temperature range.
Claim 10
Dependent Claim
66 words
The system of claim 7 , wherein the control means selectively modulates the economizer to increase the amount of outdoor air supplied to the conditioning unit when the conditioning unit is operating in the ventilation mode, the supply air temperature is below the lower setpoint of the second predetermined temperature range, and the outdoor air is above the lower setpoint of the second predetermined temperature range.
Claim 11
Dependent Claim
162 words
A control system for a conditioning unit having a heating stage and an economizer configured to provide outdoor air to the conditioning unit, the control system comprising: a memory means for storing a first predetermined temperature range having an upper setpoint and a lower setpoint and a second predetermined temperature range having an upper setpoint and a lower setpoint; and a control means for receiving an indoor air temperature representative of the air in one or more zones, a supply air temperature representative of the air entering the one or more zones, and an outdoor temperature representative of the outdoor air, the control means selectively modulating the economizer to increase the amount of outdoor air entering the conditioning unit when the indoor air temperature is within the first predetermined temperature range, the supply air temperature is above the upper setpoint of the second predetermined temperature range, and the outdoor air temperature is below the upper setpoint of the second predetermined temperature range.
Claim 12
Dependent Claim
162 words
A control system for a conditioning unit having a heating stage and an economizer configured to provide outdoor air to the conditioning unit, the control system comprising: a memory means for storing a first predetermined temperature range having an upper setpoint and a lower setpoint and a second predetermined temperature range having an upper setpoint and a lower setpoint; and a control means for receiving an indoor air temperature representative of the air in one or more zones, a supply air temperature representative of the air entering the one or more zones, and an outdoor temperature representative of the outdoor air, the control means selectively modulating the economizer to increase the amount of outdoor air entering the conditioning unit when the indoor air temperature is within the first predetermined temperature range, the supply air temperature is above the upper setpoint of the second predetermined temperature range, and the outdoor air temperature is below the upper setpoint of the second predetermined temperature range.
Claim 13
Dependent Claim
40 words
The system of claim 10 , wherein the control means activates the heating stage when the temperature of the indoor air is within the first predetermined temperature range and the supply air temperature is below the second predetermined temperature range.
Claim 14
Dependent Claim
25 words
The system of claim 10 , further comprising one or more thermostats, one of said thermostats disposed in each of the one or more zones.
Claim 15
Dependent Claim
42 words
The system of claim 12 , wherein each thermostat is programmable and configured to receive the upper setpoint and the lower setpoint for the first predetermined temperature range and the upper setpoint and the lower setpoint for the second predetermined temperature range.
Claim 16
Dependent Claim
150 words
A control system for a conditioning unit having a cooling stage and an economizer configured to provide outdoor air to the conditioning unit, the control system comprising: a memory for storing a first predetermined temperature range having an upper setpoint and a lower setpoint and a second predetermined temperature range having an upper setpoint and a lower setpoint; and a control means for receiving an indoor air temperature representative of the air in one or more zones, a supply air temperature representative of the air entering the one or more zones, and an outdoor temperature representative of the outdoor air, the control means selectively modulating the economizer when the indoor air temperature is within the first predetermined temperature range, the supply air temperature is below the lower setpoint of the second predetermined temperature range and the outdoor air temperature is above the lower setpoint of the second predetermined temperature range.
Claim 17
Dependent Claim
150 words
A control system for a conditioning unit having a cooling stage and an economizer configured to provide outdoor air to the conditioning unit, the control system comprising: a memory for storing a first predetermined temperature range having an upper setpoint and a lower setpoint and a second predetermined temperature range having an upper setpoint and a lower setpoint; and a control means for receiving an indoor air temperature representative of the air in one or more zones, a supply air temperature representative of the air entering the one or more zones, and an outdoor temperature representative of the outdoor air, the control means selectively modulating the economizer when the indoor air temperature is within the first predetermined temperature range, the supply air temperature is below the lower setpoint of the second predetermined temperature range and the outdoor air temperature is above the lower setpoint of the second predetermined temperature range.
Claim 18
Dependent Claim
40 words
The system of claim 14 , wherein the control means activates the cooling stage when the temperature of the indoor air is within the first predetermined temperature range and the supply air temperature is below the second predetermined temperature range.
Claim 19
Dependent Claim
25 words
The system of claim 14 , further comprising one or more thermostats, one of said thermostats disposed in each of the one or more zones.
Claim 20
Dependent Claim
43 words
The system of claim 16 , wherein each thermostat is programmable and is configured to receive the upper setpoint and the lower setpoint for the first predetermined temperature range and the upper setpoint and the lower setpoint for the second predetermined temperature range.
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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) | 2005-12-09 | 2006-06-10 | 2006-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-09 | 2010-06-10 | 2010-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-09 | 2014-06-10 | 2014-12-10 | $7700.00 | Window Closed / Lapsed |