VAV system coordinator
First Claim
1. In a system for monitoring and controlling the condition of air in each of a plurality of zones when using a unit operating in a heating or cooling mode and having a fan to supply heated or cooled conditioned air to each zone via a main duct and secondary ducts through a zone damper means in zone ducts communicating with each zone and operated by a damper control means, at least one said zone having zone heating means controlled by said damper control means, means for controlling and coordinating the operation of said unit with said damper control means and respective said zone damper means and respective said zone heating means, said means comprising a programmable system controller means receiving information from each said damper controller means, said system controller means including program means such that said unit is operable only in preselected allowable modes during respective distinct time periods and inoperable in such preselected modes in other time periods, means for determining the condition of air in each said zone and supplying such information to said programmable system controller means, said system controller means operating said unit in accordance with its programming, the condition of air in each zone and in accordance with information received from each damper controller means to control said unit in said preselected allowable modes during respective distinct time periods.
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Accused Products
Abstract
A microcomputer-based system coordinator for variable air volume (VAV) system through which conditioned air is supplied to a plurality of zones. The VAV system coordinator (VSC) is used to coordinate a central system VAV cooling and heating operation based on the zone requirements of its associated slave thermostats and fan box monitors. The VSC is used as a slave VSC which receives information from zone thermostats and fan box monitors and communicates with a master VSC which is used for overall system coordination. The VSC also receives information from temperature and humidity sensors and the real time for use in system operation.
99 Citations
84 Claims
- 1. In a system for monitoring and controlling the condition of air in each of a plurality of zones when using a unit operating in a heating or cooling mode and having a fan to supply heated or cooled conditioned air to each zone via a main duct and secondary ducts through a zone damper means in zone ducts communicating with each zone and operated by a damper control means, at least one said zone having zone heating means controlled by said damper control means, means for controlling and coordinating the operation of said unit with said damper control means and respective said zone damper means and respective said zone heating means, said means comprising a programmable system controller means receiving information from each said damper controller means, said system controller means including program means such that said unit is operable only in preselected allowable modes during respective distinct time periods and inoperable in such preselected modes in other time periods, means for determining the condition of air in each said zone and supplying such information to said programmable system controller means, said system controller means operating said unit in accordance with its programming, the condition of air in each zone and in accordance with information received from each damper controller means to control said unit in said preselected allowable modes during respective distinct time periods.
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58. A method for monitoring, controlling and coordinating the operation of a system which includes a central variable air volume heating and cooling unit for supplying heated or cooled conditioned air to a plurality of zones via duct dampers operated by respective damper control means wherein the system further includes at least one fan-powered mixing box operated by a mixing box control means and at least one zone having supplemental heating means controlled by the respective damper control means, wherein a programmable system controller means receives information from the damper control means and mixing box control means indicative of the condition of air in each zone and the operating mode of each fan-powered mixing box to operate the central unit in preselected allowable modes during distinct time periods, comprising the steps of:
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A. determining by the system controller means the zone demand for heating or cooling from all damper control means; B. determining by the system controller means the number of the zones having a demand for heating or cooling from all damper control means; C. determining if any fan-powered mixing box is being operated in the heating or cooling mode and the demand of and number of zones associated with any operating mixing box that is demanding the selected mode of such mixing box; D. selectively preselecting by the system controller means the number of zones having a demand for heating or cooling that is necessary to activate the central unit in an allowable mode; E. comparing the numbers obtained from steps B and C by the system controller means and selecting the desired allowable mode when the total of the number of zones having a demand for heating or cooling, respectively, as obtained in steps B and C is equal to or greater than the number selected in step D; F. activating the central unit by the system controller means in the selected mode until all zones demanding the selected mode have been satisfied; G. deactivating the central unit by the system controller means; and H. repeating steps A-G for the other mode when demand for the other mode has been selected in accord with steps A-E. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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69. A method for monitoring, controlling and coordinating the operation of a system which includes a central heating and cooling unit for supplying a plurality of zones with heated or cooled conditioned air via zone duct damper means controlled by respective damper control means wherein the system further includes at least one fan-powered mixing box operated by respective mixing box control means for supplying heated or cooled conditioned air to a group of the zones and further includes at least one zone having supplemental heating means operated by respective damper control means, wherein a programmable slave system coordinator receives information from the damper control means and the mixing box control means indicative of the condition of the air in each zone and operating mode of each fan-powered mixing box, and wherein a programmable master system coordinator receives such information from the programmable slave system coordinator to operate the central heating and cooling unit in preselected allowable modes during distinct time periods comprising the steps of:
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A. determining the zone demand for heating or cooling from all damper control means by the slave system coordinator; B. determining the number of zones having a demand for heating or cooling from all damper control means by the slave system coordinator; C. determining by the slave system coordinator if any fan-powered mixing box is being operated in the heating or cooling mode and the demand of and number of zones associated with an operating mixing box that are demanding the selected mode of such mixing box; D. selectively preselecting by the master system coordinator the total number of zones having a demand for heating or cooling that is necessary to activate the central unit in an allowable mode; E. comparing the numbers obtained from steps B and C by the master system coordinator and selecting the desired allowable mode when the total of the number of zones having a demand for heating or cooling respectively, as obtained in steps B and C is equal to or greater than the number selected in step D; F. activating the central unit by the master system coordinator in the selected mode until all zones demanding the selected mode have been satisfied; G. deactivating the central unit by the master system coordinator; and H. repeating steps A-G for the other mode when demand for the other mode has been selected in accord with steps A-E. - View Dependent Claims (70, 71, 72, 73, 74, 75, 76, 77, 78)
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- 79. In a system for monitoring and controlling the condition of air in each of a plurality of zones when using a unit having a fan to supply cooled conditioned air.,to each zone via a main duct and secondary ducts through a zone damper means in zone ducts communicating with each zone and operated by a damper control means, means for controlling and coordinating the operation of said unit with said damper control means and respective said zone damper means, said means comprising a programmable system controller means receiving information from each said damper controller means, said system controller means including program means such that said unit is operable only in preselected allowable modes during respective distinct time periods and inoperable in such preselected modes in other time periods, means for determining the condition of air in each said zone and supplying such information to said programmable system controller means, said system controller means operating said unit in accordance with its programming, the condition of air, in each zone and in accordance with information received from each damper controller means to control said unit in preselected allowable modes during said respective distinct time periods.
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82. A method for monitoring, controlling and coordinating the operation of a system which includes a central variable air volume heating and cooling unit for supplying heated or cooled conditioned air to a plurality of zones via duct dampers operated by respective damper control means, wherein a programmable system controller means, which includes selectable programs such that the central unit is operable only in preselected allowable heating or cooling modes during respective distinct time periods and inoperable in such preselected modes in other time periods, receives information from the damper control means indicative of the condition of air in each zone to operate the central unit only in the cooling mode during distinct time periods, when a program that allows only cooling has been selected for that respective time period, comprising the steps of:
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A. determining by the system controller means the zone demand for cooling from all damper control means; B. determining by the system controller means the number of the zones having a demand for cooling from all damper control means; C. selectively preselecting by the system controller means the number of zones having a demand for cooling that is necessary to activate the central unit in a cooling mode; D. comparing the numbers obtained from steps B and C by the system controller means and selecting the desired allowable mode when the total of the number of zones having a demand for cooling, as obtained in step B is equal to or greater than the number selected in step C; E. activating the central unit by the system controller means in the cooling mode until all zones demanding the selected mode have bene satisfied; and F. deactivating the central unit by the system controller means. - View Dependent Claims (83, 84)
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Specification