Device abstraction system and method for a distributed architecture heating, ventilation and air conditioning system
AssigneeLennox Industries Inc.
InventorsDarko Hadzidedic, Wojciech Grohman
Life of this patent
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Abstract
The disclosure provides an HVAC data processing and communication network and a method of manufacturing the same. In an embodiment, the network includes configuring a first system device and a subnet controller. The first system device is configured to receive an initial value of a specified dependent parameter. The subnet controller is configured to determine that a value of said specified parameter has been changed to a modified value after said first system device receives said initial value. The subnet controller is further configured to send to said first system device, in response to said determining, a message updating said specified parameter with said modified value.
Claims20
A method of manufacturing an HVAC data processing and communication network, comprising:
- forming an HVAC network by causing a plurality of HVAC system devices to be coupled to a data bus, at least one of said HVAC system devices constituting an HVAC demand unit having an integral network controller;
- configuring a first HVAC system device to receive an initial value of a specified first parameter that is dependent upon a value of a second parameter of either said first HVAC system device or of a second HVAC system device;
- configuring said integral network controller to:
- determine that a value of said second parameter has changed after said first HVAC system device receives said initial value;
- and
- send said first HVAC system device a message modifying said first parameter in view of said second parameter change.
An HVAC data processing and communication network, comprising:
- a plurality of HVAC system devices coupled to a data bus, at least one of said HVAC system devices constituting an HVAC demand unit having an integral network controller;
- a first HVAC system device configured to receive an initial value of a specified first parameter that is dependent upon a value of a second parameter of either said first HVAC system device or of a second HVAC system device;
- and
- said integral network controller configured to:
- determine that a value of said second parameter has changed after said first HVAC system device receives said initial value;
- and
- send said first HVAC system device a message modifying said first parameter in view of said second parameter change.
A subnet controller, comprising:
- a physical layer interface configured to couple to a data bus for an HVAC system;
- and
- a controller integral with an HVAC system device demand unit configured to:
- receive messages via said data bus from a first and a second HVAC system device;
- determine from said received messages that an initial value of a specified dependent parameter supplied to said first HVAC system device by said second HVAC system device has been changed after said first HVAC system device receives said initial value;
- and
- send to said first HVAC system device, in response to the determination that an initial value of a specified dependent parameter has changed, a message via said data bus updating said specified parameter in view of the change.
Dependencies are inferred from the claim text.