System for supplying communications and power to a thermostat over a two-wire system
First Claim
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1. A system for supplying operational power to and receiving data from a thermostat, comprising:
- a controller unit, said controller unit supplying operational DC-power to said thermostat and including a first microprocessor,said thermostat being connected for receiving the operational DC-power from said controller unit,said thermostat including a second microprocessor operably connected for supplying data to said controller unit by interrupting the operational DC-power supplied from said controller unit, andsaid thermostat supplying data from the second microprocessor to said controller unit through interruptions in the operational DC-power that produce modulations at the thermostat which are demodulated at the controller unit and received at the first microprocessor.
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Abstract
One embodiment of the invention discloses a system for supplying power and data to and receiving data from a thermostat over a two-wire system. The invention allows modern thermostats that feature digital communications to be installed in two-wire systems, such as conventional older technology thermostat systems. In this manner, one or more embodiments of the invention disclose systems for simplifying and reducing costs associated with upgrading conventional older technology HVAC systems to accommodate modern thermostat technologies.
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Citations
6 Claims
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1. A system for supplying operational power to and receiving data from a thermostat, comprising:
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a controller unit, said controller unit supplying operational DC-power to said thermostat and including a first microprocessor, said thermostat being connected for receiving the operational DC-power from said controller unit, said thermostat including a second microprocessor operably connected for supplying data to said controller unit by interrupting the operational DC-power supplied from said controller unit, and said thermostat supplying data from the second microprocessor to said controller unit through interruptions in the operational DC-power that produce modulations at the thermostat which are demodulated at the controller unit and received at the first microprocessor. - View Dependent Claims (2, 3, 5)
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4. A system for supplying power to and receiving data from a thermostat over two wires, comprising:
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an HVAC-controller unit, said HVAC-controller unit supplying operational DC-power to said thermostat over the two wires and including a first microprocessor, said thermostat being connected for receiving operational DC-power over the two wires from said controller unit, said thermostat including a second microprocessor operably connected for supplying data over the two wires to said controller unit by interrupting the operational DC-power supplied from said controller unit, said thermostat supplying data from the second microprocessor to said controller unit on said operational DC-power through interruptions in the operational DC-power that produce modulations at the thermostat which are demodulated at the controller unit and received at the first microprocessor, a PNP-transistor at said thermostat, said PNP-transistor featuring a collector, an emitter, and a base terminal, said collector and emitter terminals being connected to said operational DC-power source and placed in series to act as a switch, and said base terminal being connected to a data bus of said second microprocessor, such that data from said data bus in said second microprocessor is modulated through interruptions in the conductance to said operational DC-power source such that data is modulated as interruptions in the current of said operational DC-power. - View Dependent Claims (6)
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Specification