Temperature compensation for an electronic thermostat
AssigneeComputime, Ltd.
InventorsYau Wai Ng, Hung Bun Choi, Chun Kit Chu
Life of this patent
Estimating the term…
Abstract
An aspect of the embodiments provides a compensation for the temperature rise effect on the printed circuit board (PCB) of an electronic thermostat to obtain better precision and performance. Once the measurements from the temperature sensors have stabilized, the compensated ambient temperature may be used by an associated system (for example, a Heating, Ventilation, and Air Conditioning (HVAC) system).
Claims21
A method for compensating a measured temperature for an electronic thermostat, the method comprising:
- thermally isolating a temperature compensation sensor and an ambient temperature sensor from a main compartment of the electronic thermostat, wherein the temperature compensation sensor and the ambient temperature sensor are located in a sensor chamber;
- creating a first thermal pathway between the temperature compensation sensor and the ambient temperature sensor, wherein the first thermal pathway thermally connects from the main compartment to the sensor chamber and restricts heat flow to the temperature compensation sensor and the ambient temperature sensor;
- obtaining a thermal parameter that characterizes a thermal characteristic of the electronic thermostat;
- receiving a measured ambient temperature (Ts) and a compensation temperature (Tc1) from the ambient temperature sensor and the compensation temperature sensor, respectively;
- and
- determining a temperature indicator of a compensated ambient temperature (Tambient) from the measured ambient temperature, the compensation temperature and the thermal parameter.
An electronic thermostat controlling a home Internet of Things (IoT) system, the electronic thermostat comprising:
- a first printed circuit board;
- a main compartment;
- a sensor chamber;
- at least one component that is located in the main compartment on the first printed circuit board;
- a temperature compensation sensor and an ambient temperature sensor located in the sensor chamber;
- the sensor chamber configured to thermally isolate the temperature compensation sensor and the ambient temperature sensor from the main compartment and configured to establish a first thermal pathway between the temperature compensation sensor and the ambient temperature sensor, wherein the first thermal pathway thermally connects to the main compartment to the sensor chamber and restricts heat flow to the temperature compensation sensor and the ambient temperature sensor from the main compartment;
- and
- a compensation circuit configured to compensate a measured ambient temperature (Ts) based on a measured compensation temperature (Tc1), configured to obtain a compensated ambient temperature (Tambient), and configured to provide the compensated ambient temperature to the home IoT system.
One or more non-transitory computer-readable media storing instructions that, when executed by an electronic thermostat comprising at least one processor, memory, an ambient temperature sensor, and a temperature compensation sensor, cause the electronic thermostat to:
- obtain a thermal resistance ratio that characterizes a thermal characteristic of the electronic thermostat;
- receive a measured ambient temperature (Ts) and a compensation temperature (Tc1) from the ambient temperature sensor and the compensation temperature sensor, respectively, wherein the temperature compensation sensor and the ambient temperature sensor are located in a sensor chamber;
- and
- determine a temperature indicator of a compensated ambient temperature (Tambient) from the measured ambient temperature, the compensation temperature, and the thermal resistance ratio.
Dependencies are inferred from the claim text.