MULTI-MODE AUTO CHANGEOVER SYSTEM
First Claim
Patent Images
1. A thermostat comprising:
- a cool mode and heat mode mechanism having a connection for controlling a building heating and cooling system for affecting a temperature of a space;
a temperature setpoint mechanism, having cool and heat setpoints that are adjustable, connected to the cool mode and heat mode mechanism; and
an auto changeover connected to the temperature setpoint mechanism; and
wherein;
the auto changeover can switch the thermostat from one mode to another mode according to the temperature of the space for a set amount of time relative to the cool and heat setpoints and hystereses above and below the cool and heat setpoints, respectively;
the auto changeover can occur when a cool setpoint is less than a heat setpoint;
the auto changeover can occur when the cool and heat setpoints are the same; and
the auto changeover can occur when a cool setpoint is greater than a heat setpoint.
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Abstract
An auto changeover mechanism for a thermostat. A heat and cool mode auto changeover with single or crossed setpoints may be an approach for doing a single setpoint auto changeover, an approach that can handle auto changeover with separate heat and cool setpoints that do not require the cool setpoint to always be higher than the heat setpoint, and also an approach that does not necessarily require a dead band between the setpoints. A hysteresis may be associated with switching to the other mode. The thermostat having the auto changeover mechanism may have a display of a mode that automatically changes between heat and cool.
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Citations
20 Claims
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1. A thermostat comprising:
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a cool mode and heat mode mechanism having a connection for controlling a building heating and cooling system for affecting a temperature of a space; a temperature setpoint mechanism, having cool and heat setpoints that are adjustable, connected to the cool mode and heat mode mechanism; and an auto changeover connected to the temperature setpoint mechanism; and wherein; the auto changeover can switch the thermostat from one mode to another mode according to the temperature of the space for a set amount of time relative to the cool and heat setpoints and hystereses above and below the cool and heat setpoints, respectively; the auto changeover can occur when a cool setpoint is less than a heat setpoint; the auto changeover can occur when the cool and heat setpoints are the same; and the auto changeover can occur when a cool setpoint is greater than a heat setpoint. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A thermostat system comprising:
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a thermostat hardware device; and wherein; the thermostat hardware device comprises; a cool mode and heat mode mechanism having a connection for controlling a building heating and cooling system for affecting a temperature of a space; a temperature setpoint mechanism, having cool and heat setpoints that are adjustable, connected to the cool mode and heat mode mechanism; and an auto changeover connected to the temperature setpoint mechanism; and wherein; the auto changeover can switch the thermostat from one mode to another mode according to the temperature of the space relative to the cool and heat setpoints; and the cool setpoint is greater or less than, or equal to the heat setpoint. - View Dependent Claims (9, 10, 11)
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12. A thermostat device for a heating, ventilation and air conditioning system of a building, comprising:
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a user interface; a controller configured to receive inputs from the user interface and to activate or deactivate one or more components of a heating, ventilation, and air conditioning system of a building; an auto changeover connected to the controller, for switching from one mode to another mode according to the temperature of the space at a set amount of time relative to a time a temperature controlled space reaches a cool setpoint or heat setpoint, and having adjustable hystereses above and below the cool and heat setpoints, respectively; and wherein; the user interface displays a mode of the thermostat and automatically indicates a heat or cool mode that is in effect; and the cool setpoint is different from the heat setpoint and a minimum deadband is not required between the cool setpoint and the heat setpoint. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification