CA2633200A1 - Programmable thermostat with preemptive setpoint adaptation based upon detection of occupancy - Google Patents

Programmable thermostat with preemptive setpoint adaptation based upon detection of occupancy Download PDF

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Publication number
CA2633200A1
CA2633200A1 CA002633200A CA2633200A CA2633200A1 CA 2633200 A1 CA2633200 A1 CA 2633200A1 CA 002633200 A CA002633200 A CA 002633200A CA 2633200 A CA2633200 A CA 2633200A CA 2633200 A1 CA2633200 A1 CA 2633200A1
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Canada
Prior art keywords
thermostat
occupancy
thermostat control
temperature
user
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Granted
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CA002633200A
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French (fr)
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CA2633200C (en
Inventor
Howard Rosen
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Iaed Technologies Inc
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EEBEEYESS TECHNOLOGIES Inc
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Publication of CA2633200A1 publication Critical patent/CA2633200A1/en
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Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1902Control of temperature characterised by the use of electric means characterised by the use of a variable reference value

Abstract

A thermostat system which incorporates a mechanism for detecting occupancy in a room or area in which a programmable thermostat is located when combined with user programming facility provides the ability for establishing programming sequences that can reduce energy usage while still providing for comfort. The inclusion of a mechanism for detecting occupancy in the programmable thermostat increases the convenience and efficiency of operation by allowing a thermostat program to normally run in a user specified time-based temperature sequence mode designed for increased energy saving, and then to having that mode of normal operation automatically preempted when occupancy is detected.

Claims (17)

1. A programmable thermostat apparatus for controlling space conditioning equipment serving a conditioned space comprising:

A) a temperature sensor providing an electrical signal indicative of temperature of the conditioned space;

B) an occupancy sensor providing a signal indicative of current occupancy of the conditioned space;

C) a user interface mechanism including a display for selectively displaying an alphanumeric message, and a user input mechanism for entering:

1) user normal program information which specifies a user's time based normal thermostat control sequence with multiple temperature settings dependent on time of day and day of week; and
2) a preset comfortable room temperature;

D) a thermostat control unit, said thermostat control unit including:
1) a microprocessor;

2) a memory operatively coupled to said microprocessor for storing a thermostat control program and data, and also the user normal program information and the user's desired preset comfortable room temperature;
3) a real time clock accessible by the microprocessor for determining current date and time information;
4) an input/output unit operatively coupled to said microprocessor including:

a) a first sensor input for receiving the electrical signal indicative of temperature of the conditioned space from said temperature sensor;

b) a second sensor input for receiving the signal indicative of current occupancy of the conditioned space from said occupancy sensor;

c) a control output for issuing control signals to be used in controlling the space conditioning equipment;

d) an output connection to the display providing data from the thermostat control program running on the microprocessor to the liquid crystal display;
and e) an input connection from the user input mechanism for receiving user programming information;

E) the thermostat control program of the thermostat control unit calculating and maintaining a currently desired conditioned space temperature to be used in comparison with the electrical signal indicative of temperature of the conditioned space from the temperature sensor, and issuing an output control signal to the space conditioning equipment causing it to bring the conditioned space temperature closer to the desired value for conditioned space temperature;

F) in the absence of a signal of current occupancy, the microprogram processor under control of the thermostat control program setting the currently desired value for conditioned space temperature to follow the normal user's time based normal thermostat control sequence intended for use during periods of no occupancy;

G) upon receiving a signal of occupancy, the thermostat control program preempting any previous thermostat control sequence and changing the currently desired temperature for the conditioned space to the preset comfortable room temperature intended for use during periods of occupancy as set by the user of the thermostat, then maintaining the currently desired temperature for the conditioned space at that preset comfortable room temperature until a signal of occupancy has not been received for a pre-established time interval and then resuming processing as though no interruption of the normal thermostat control sequence had occurred.

2. The programmable thermostat apparatus of claim 1, wherein the apparatus is contained as a unit intended typically to be mounted on a wall within a room or area served by the space conditioning equipment.

3. The programmable thermostat apparatus of claim 1, wherein the apparatus is contained as a thermostat unit intended typically to be mounted on a wall within a room or area served by the space conditioning equipment, except that the occupancy sensor may be contained in a package external to the thermostat and operatively coupled to the second sensor of the input/output unit for purpose of sending said signal indicative of current occupancy.

4. The programmable thermostat apparatus of claim 1, wherein the space conditioning equipment to be controlled by the thermostat system is an electric heater and the thermostat system further includes:

A) an electronic switch which is a triac device connected so as to be gated by the control output of the input/output unit of the thermostat control unit, and then used to gate house power for supply to the space conditioning equipment which is the electric heater.
5. The programmable thermostat apparatus of claim 1, wherein the space conditioning equipment to be controlled by the thermostat system is an electric baseboard heater and the thermostat system further includes:

A) an electronic switch which is a triac device connected so as to be gated by the control output of the input/output unit of the thermostat control unit, and then used to gate house power for supply to the space conditioning equipment which is the electric baseboard heater.
6. The programmable thermostat apparatus of claim 1, further including:

A) an input button implemented for easy accessibility as part of the user interface mechanism which overrides any detection of current occupancy and causes the microprogram processor under control of the thermostat control program to resume processing as though no interruption of the any thermostat control sequence had occurred, thus invoking the normal thermostat control sequence normally intended for use when the conditioned space is unoccupied.
7. The programmable thermostat apparatus of claim 1, further including:

A) thermostat control program analysis of the output from the occupancy sensor which is a signal indicative of current occupancy to determine a level of activity indication based upon frequency of movement detected by the occupancy sensor, and with said analysis being more than is necessary to determine simple occupancy and no occupancy; and B) using the level of activity indication to effect determination of the currently desired conditioned space temperature.
8. The programmable thermostat apparatus of claim 1, further including:

A) thermostat control program analysis of the output from the occupancy sensor which is a signal indicative of current occupancy to determine a level of activity indication based upon frequency of movement detected by the occupancy sensor;
and B) using a high level of activity indication to effect a lowering of the temperature determined by the thermostat control program as the currently desired conditioned space temperature, compared to the temperature that would have been determined if just the condition of occupancy alone was considered.
9. A programmable thermostat apparatus for controlling space conditioning equipment serving a conditioned space comprising:

A) a temperature sensor providing an electrical signal indicative of temperature of the conditioned space;

B) an occupancy sensor providing a signal indicative of current occupancy of the conditioned space;

C) a user interface mechanism including a display for selectively displaying an alphanumeric message, and a user input mechanism for entering user program information which specifies:

1) a first thermostat control sequence which is a user's time based normal thermostat control sequence intended for use during periods of no occupancy;
and 2) a second thermostat control sequence which is a user's time based comfortable thermostat control sequence intended for use during periods of occupancy;

D) a thermostat control unit, said thermostat control unit including:

1) a microprocessor;

2) memory operatively coupled to said microprocessor for storing a thermostat control program and also for storing data describing user program information and data including the user's time based normal thermostat control sequence;

3) a real time clock accessible by the microprocessor for determining current date and time information;

4) an input/output unit operatively coupled to said microprocessor including:

a) a first sensor input for receiving the electrical signal indicative of temperature of the conditioned space from said temperature sensor;

b) a second sensor input for receiving the signal indicative of current occupancy of the conditioned space from said occupancy sensor;

c) a control output for issuing control signals to be used in controlling the space conditioning equipment;

d) an output connection to the display providing data from the thermostat control program running on the microprocessor to the display; and e) an input connection from the user input mechanism for receiving user programming information;

E) the thermostat control program of the thermostat control unit calculating and maintaining a currently desired conditioned space temperature to be used in comparison with the electrical signal indicative of temperature of the conditioned space from the temperature sensor, and issuing output control signals to the space conditioning equipment causing it to bring the conditioned space temperature closer to the desired value for conditioned space temperature;

F) in the absence of a signal of current occupancy, the microprogram processor under control of the thermostat control program setting the currently desired conditioned space temperature to follow said first thermostat control sequence intended for use during periods of no occupancy;

G) upon receiving a signal of occupancy, the thermostat control program preempting any previous thermostat control sequence and then following said second thermostat control sequence for use during periods of occupancy until a signal of occupancy has not been received for a pre-established time interval, then setting the desired conditioned space temperature as though no interruption of the first thermostat control sequence had occurred, and resuming said first thermostat control sequence.
10. The programmable thermostat apparatus of claim 9, wherein the apparatus is wholly contained as a unit intended typically to be mounted on a wall within a room or area served by the space conditioning equipment.
11. The programmable thermostat apparatus of claim 9, wherein the space conditioning equipment controlled by the thermostat system is an electric heater and the thermostat system further includes:

A) an electronic switch which is a triac device connected so as to be gated by the control output of the input/output unit of the thermostat control unit, and then used to gate house power for supply to the space conditioning equipment which is the electric heater.
12. The programmable thermostat apparatus of claim 9, wherein the space conditioning equipment controlled by the thermostat system is an electric baseboard heater and the thermostat system further includes:

A) an electronic switch which is a triac device connected so as to be gated by the control output of the input/output unit of the thermostat control unit, and then used to gate house power for supply to the space conditioning equipment which is the electric baseboard heater.
13. The programmable thermostat apparatus of claim 9, further including:

A) thermostat control program analysis of the output from the occupancy sensor to determine a level of activity indication based upon frequency of movement detected by the occupancy sensor, and with said analysis being more than is necessary to determine simple occupancy and no occupancy; and B) using the level of activity indication to effect determination of the currently desired conditioned space temperature.
14. The programmable thermostat apparatus of claim 9, further including:

A) thermostat control program analysis of the output from the occupancy sensor which is a signal indicative of current occupancy to determine a level of activity indication based upon frequency of movement detected by the occupancy sensor;
and with said analysis being more than is necessary to determine simple occupancy and no occupancy; and B) using the level of activity indication to modify the temperature specified by the time-based thermostat control sequence currently in use.
15. The programmable thermostat apparatus of claim 9, further including:

A) thermostat control program analysis of the output from the occupancy sensor which is a signal indicative of current occupancy to determine a level of activity indication based upon frequency of movement detected by the occupancy sensor;
and B) using a high level of activity indication to effect a lowering of the temperature determined by the thermostat control program as the currently desired conditioned space temperature, compared to the temperature that would have been determined if just the condition of occupancy alone was considered.
16. A method of operating a programmable thermostat device for controlling space conditioning equipment supplying conditioned air to a conditioned space comprising the steps of:

A) Include within a thermostat housing designed to be mounted on a wall a thermostat control unit with a microprogram processor controlled by a thermostat control program;
B) Attach to the thermostat control unit an occupancy sensor and a temperature sensor situated such as to detect occupancy and temperature respectively;

C) Attach also to the thermostat control unit a display device for displaying alphanumeric messages;

D) Attach also to the thermostat control unit a user control interface for capturing user input;

E) Utilizing the display device and the user control interface, capture user input in the form of at least one thermostat control sequence intended as a normal thermostat control sequence intended for invocation during periods of no occupancy;

F) Capture further user input in the form of a temperature to be used as a comfortable set temperature during periods of occupancy;

G) Run a thermostat control program which, in the absence of a signal indicating detected occupancy, follows the user's time-based normal thermostat control sequence to set a desired condition space temperature.

H) The thermostat control program, upon reception of a signal of occupancy from the occupancy sensor preempting the normal user's time-based normal thermostat control sequence and setting the desired condition space temperature to the comfortable set temperature as intended by the user for use during periods of occupancy.

I) The thermostat control program, when occupancy is no longer signaled for some selected period of time, setting the desired condition space temperature to a value as though the user's time-based normal thermostat control sequence had not been interrupted, and then resuming normal thermostat operation by returning to step G).
17. A method of operating a programmable thermostat device for controlling space conditioning equipment supplying conditioned air to a conditioned space comprising the steps of:

A) Include within a thermostat housing designed to be mounted on a wall a thermostat control unit with a microprogram processor controlled by a thermostat control program;

B) Attach to the thermostat control unit an occupancy sensor and a temperature sensor situated such as to detect occupancy and temperature respectively;

C) Attach also to the thermostat control unit a display device for displaying alphanumeric messages;

D) Attach also to the thermostat control unit a user control interface for capturing user input;

E) Utilizing the display device and the user control interface, capture user input in the form of a first thermostat control sequence which is a user's time-based thermostat normal thermostat control sequence intended for invocation during periods of no occupancy;

F) Capture further user input in the form of a second thermostat control sequence which is a user's time-based comfortable thermostat control sequence intended for invocation during periods of occupancy;

G) Run a thermostat control program which, in the absence of a signal indicating detected occupancy, follows the first thermostat control sequence as intended by the user for invocation during periods of no occupancy;

H) The thermostat control program, upon reception of a signal of occupancy from the occupancy sensor preempting the normal thermostat control sequence and invoking execution of said second thermostat control sequence as intended by the user for invocation during periods of occupancy;

I) When occupancy is no longer signaled for some selected period of time, set the desired condition space temperature to a value as though the first thermostat control sequence had not been interrupted, and then resume normal operation by returning to step G).
CA2633200A 2007-10-29 2008-06-20 Programmable thermostat with preemptive setpoint adaptation based upon detection of occupancy Active CA2633200C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92695007A 2007-10-29 2007-10-29
US11/926,950 2007-10-29

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WO2018176353A1 (en) * 2017-03-31 2018-10-04 深圳市源畅通科技有限公司 Indoor environment self-regulation system
US10546472B2 (en) 2015-10-28 2020-01-28 Johnson Controls Technology Company Thermostat with direction handoff features
US10627126B2 (en) 2015-05-04 2020-04-21 Johnson Controls Technology Company User control device with hinged mounting plate
CN114353256A (en) * 2022-01-20 2022-04-15 Tcl空调器(中山)有限公司 Air supply method and device for air conditioner, electronic equipment and storage medium

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US10409591B2 (en) 2012-08-24 2019-09-10 Lapins Holdings Pty Ltd Device, system and method for controlling an operation
US9765984B2 (en) 2014-04-02 2017-09-19 Trane International Inc. Thermostat temperature compensation modeling
US10859280B2 (en) 2014-04-02 2020-12-08 Trane International Inc. Dynamic thermostat temperature compensation modeling and control in an HVAC system
US11719456B2 (en) 2014-04-02 2023-08-08 Trane International Inc. Thermostat temperature compensation modeling
US10627126B2 (en) 2015-05-04 2020-04-21 Johnson Controls Technology Company User control device with hinged mounting plate
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CN114353256A (en) * 2022-01-20 2022-04-15 Tcl空调器(中山)有限公司 Air supply method and device for air conditioner, electronic equipment and storage medium

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