Multiple heatsink cooling system for a line voltage thermostat
First Claim
1. A thermostat for controlling an electric heater comprising:
- a housing;
a display positioned in the housing;
a temperature setpoint device disposed within the housing;
an ambient temperature sensor;
a comparator mechanism disposed within the housing, the comparator mechanism having an input connected to the ambient temperature sensor and the temperature setpoint device and configured to receive temperature indications from the ambient temperature sensor and the temperature setpoint device and determine to connect and disconnect the electric heater from a power source based on the received temperature indications;
a power switch positioned within the housing, the power switch having a control terminal connected to an output of the comparator mechanism allowing the comparator mechanism to open and close the power switch in response to the comparator mechanism determining to connect and disconnect the electric heater from the power source; and
wherein the power switch comprises;
two or more separate heatsinks;
a solid state switch situated on each heatsink; and
wherein the solid state switches are connected in parallel to one another and connected to the control terminal allowing the comparator mechanism to open and close each solid state switch.
2 Assignments
0 Petitions
Accused Products
Abstract
A line voltage thermostat having a multiple heatsink switch. A total switch may have a semiconductor switch mounted on each heatsink of the multiple heatsink switch. The semiconductor switches of the respective heatsinks may be connected in parallel to represent the total switch. Each of the two or more heatsinks, having a semiconductor switch for switching, and in total conveying the same power as one equivalent switch with one total heatsink, may have higher maximum operating temperatures and higher thermal resistances than twice the thermal resistance of the one total heatsink. The two or more heatsinks may be situated within a housing of the line voltage thermostat, and be easier to distribute in the housing to achieve an efficient layout of a display and control buttons for the thermostat.
429 Citations
20 Claims
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1. A thermostat for controlling an electric heater comprising:
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a housing; a display positioned in the housing; a temperature setpoint device disposed within the housing; an ambient temperature sensor; a comparator mechanism disposed within the housing, the comparator mechanism having an input connected to the ambient temperature sensor and the temperature setpoint device and configured to receive temperature indications from the ambient temperature sensor and the temperature setpoint device and determine to connect and disconnect the electric heater from a power source based on the received temperature indications; a power switch positioned within the housing, the power switch having a control terminal connected to an output of the comparator mechanism allowing the comparator mechanism to open and close the power switch in response to the comparator mechanism determining to connect and disconnect the electric heater from the power source; and wherein the power switch comprises; two or more separate heatsinks; a solid state switch situated on each heatsink; and wherein the solid state switches are connected in parallel to one another and connected to the control terminal allowing the comparator mechanism to open and close each solid state switch. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A thermostat for controlling an electric heater comprising:
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a housing; a display positioned in the housing; a temperature setpoint device disposed within the housing; an ambient temperature sensor; a comparator mechanism disposed within the housing, the comparator mechanism having an input connected to the ambient temperature sensor and the temperature setpoint device and configured to receive temperature indications from the ambient temperature sensor and the temperature setpoint device and determine to connect and disconnect the electric heater from a power source based on the received temperature indications; a power switch positioned within the housing, the power switch having a control terminal connected to an output of the comparator mechanism allowing the comparator mechanism to open and close the power switch in response to the comparator mechanism determining to connect and disconnect the electric heater from the power source; and wherein the power switch comprises; a first heatsink having a first solid state switch situated thereon, the first heatsink positioned at a first location within the housing; a second heatsink having a second solid state switch situated thereon, the second heatsink positioned at a second location within the housing, the second location positioned a maximum distance from the first location; and wherein the solid state switches are connected in parallel to one another and connected to the control terminal allowing the comparator mechanism to open and close each solid state switch. - View Dependent Claims (9, 10, 11, 12)
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13. A heatsink cooling system for a line voltage thermostat comprising:
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a switching component having a control terminal and comprising two or more heat-sinks connected in parallel, each heat-sink including a semiconductor switch situated thereon, wherein the parallel arrangement causes a decrease in power supplied to each semiconductor switch allowing the switching component to operate at an increased temperature; and a thermostatic control having an output; and a comparator mechanism having an input connected to the output of the thermostatic control and having an output connected to the control terminal of the switching, the comparator mechanism configured to compare a first temperature indication from an ambient temperature sensor and a second temperature indication from the thermostatic control and to provide a first output signal, a second output signal or does not provide an output signal to the switching component via the control terminal; wherein; each semiconductor switch has an input connectable to a line voltage and an output connectable to an electric load, and a connection to the control terminal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification