Single zone HVAC controlled for operation in multiple zone arrangement
First Claim
1. In a control system for monitoring and controlling the condition of air in each of a plurality of zones when using a single zone HVAC unit having a single supply air duct through which cool air or heated air is delivered into each zone, a thermostat means in each zone interfaced with and controlling a damper means in a duct supplying conditioned air to its respective zone and providing information to a control means, said control means including a monitor having a plurality of selectable control switches, said monitor being interfaced with the HVAC unit, each said thermostat means determining the condition of the air in its associated zone, said monitor activating the HVAC unit in accordance with the selected switches and the information provided from said zone theremostats to control the HVAC unit in the heating mode or cooling mode or ventilating mode.
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Accused Products
Abstract
A monitoring and control system for a heating, ventilating and air conditioning (HVAC) unit which provides zone control in plural zones in which each zone includes a control thermostat that is interfaced with the monitoring system so that each zone thermostat controls the HVAC unit as well as a damper unit for that particular zone thereby enabling independent zonal control in a multiple zone system which uses a single zone HVAC unit. The monitor considers individual zone needs, damper positions, amount of demand in the zone, mode of the zone damper and other factors which affect the comfort of zone occupants and, in response to signals from the thermostats, decides how and when to control the HVAC unit so that, in effect, a single zone HVAC unit becomes a multiple zone system. The system is comprised of two or more computerized thermostats which control both the HVAC unit through the monitoring control and the air distribution system of each zone through the damper for each zone, creating a heating, cooling, variable air volume and variable temperature control system. The thermostats also operate under control of signals received from the monitor.
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Citations
45 Claims
- 1. In a control system for monitoring and controlling the condition of air in each of a plurality of zones when using a single zone HVAC unit having a single supply air duct through which cool air or heated air is delivered into each zone, a thermostat means in each zone interfaced with and controlling a damper means in a duct supplying conditioned air to its respective zone and providing information to a control means, said control means including a monitor having a plurality of selectable control switches, said monitor being interfaced with the HVAC unit, each said thermostat means determining the condition of the air in its associated zone, said monitor activating the HVAC unit in accordance with the selected switches and the information provided from said zone theremostats to control the HVAC unit in the heating mode or cooling mode or ventilating mode.
- 7. In a control system for a single zone HVAC unit having a single supply air duct through which cool air or heated air is delivered to maintain desired temperature conditions in a plurality of zones in which each zone includes a thermostat and a damper assembly to control the conditioned air to respective said zones, said system comprising a monitor interfaced with the HVAC unit and each said thermostat and damper assembly, said monitor including a plurality of selectable switches for controlling the operation and performance characteristics of the HVAC unit in accord with the switches selected, said monitor receiving information from each thermostat and analyzing such information in accord with the switches selected before operating the HVAC unit in the heating, cooling or venitlating mode.
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11. A control system for monitoring and controlling the condition of air within each of a plurality of zones when using a single zone HVAC unit comprising:
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(a) a governor thermostat associated with each of said zones, (b) means associated with each zone controlled by the governor thermostat for controlling the flow of air into its respective zone, (c) monitor means responsive to signals indicative of the condition of the air in each of said zones controlling the state of said HVAC unit, said monitor means including (d) means responsive to the mode of said HVAC unit and said signals indicative of the condition of the air in each of said zones to control each said governor thermostat. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method for controlling the positioning of a plurality of dampers of zone duct damper means prior to activating a single zone HVAC unit that supplies heated or cooled conditioned air through a single duct system having duct damper means and ducts to a plurality of zones and zone thermostats associated with respective dampers comprising the steps of:
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A. determining the demand for heating or cooling from all zone thermostats; B. selecting the heating or the cooling mode depending on such demand and setting all zone thermostats in the selected mode; C. closing appropriate dampers if the zone thermostats controlling such appropriate dampers have no demand or demand a mode different than the mode selected to step B, and positioning open the other dampers; D. activating the HVAC unit in the selected mode until all zone thermostats demanding the selected mode have been satisfied; E. deactivating the HVAC unit; and F. repeating steps A-E for the other mode when demand for the other mode has been selected in accord with steps A and B. - View Dependent Claims (20, 21, 22, 23)
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24. A method of monitoring and controlling the condition of air within each of a plurality of zones being supplied with heated or cooled conditioned air from a single zone HVAC unit via a single duct system having zone ducts and zone duct damper means therein controlled by zone thermostats and a monitor means monitoring and controlling all zone duct thermostats and the HVAC unit comprising the steps of:
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A. setting the set point of each of the zone thermostats to the comfort level of the respective zone occupants; B. monitoring the demand for heating or cooling from all zone thermostats by the monitor means which selects either of the heating or cooling mode of the HVAC unit; C. positioning the zone duct damper means open if the zone thermostats are demanding the selected mode and closed for the other damper means; D. activating the HVAC unit by the monitor means in the selected mode until all zone thermostats demanding the selected mode have been satisfied; and E. deactivating the HVAC unit. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method for controlling a single zone HVAC unit and a single duct system including a plurality of zone ducts having a respective zone duct damper means therein regulated by zone thermostats in respective zones and the zone thermostats controlling the HVAC unit via a monitor means, comprising the steps of
A. determing zone demands from a plurality of said zones by the thermostats and producing zone demand signals indicative of the demand for heating or cooling or no demand; -
B. receiving zone demand signals in a monitor means; C. comparing the number of signals demanding heating with signals demanding cooling; D. selecting the heating or cooling mode; E. opening said damper means of zones demanding the selected mode and closing said damper means of zones demanding the unselected mode and zones having no demand; F. activating by said monitor means the HVAC unit in the selected mode until all zone thermostats demanding the selected mode have been satisfied; and G. deactivating the HVAC unit. - View Dependent Claims (41, 42, 43, 44, 45)
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Specification