CA2229096A1 - Thermostat with remote temperature sensors and incorporating a measured temperature feature for averaging ambient temperatures at selected sensors - Google Patents

Thermostat with remote temperature sensors and incorporating a measured temperature feature for averaging ambient temperatures at selected sensors

Info

Publication number
CA2229096A1
CA2229096A1 CA002229096A CA2229096A CA2229096A1 CA 2229096 A1 CA2229096 A1 CA 2229096A1 CA 002229096 A CA002229096 A CA 002229096A CA 2229096 A CA2229096 A CA 2229096A CA 2229096 A1 CA2229096 A1 CA 2229096A1
Authority
CA
Canada
Prior art keywords
temperature
sensors
thermostat
averaged
measured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002229096A
Other languages
French (fr)
Other versions
CA2229096C (en
Inventor
Brian Lakin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robertshaw Controls Co
Original Assignee
Coleman Safety and Security Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coleman Safety and Security Products Inc filed Critical Coleman Safety and Security Products Inc
Publication of CA2229096A1 publication Critical patent/CA2229096A1/en
Application granted granted Critical
Publication of CA2229096C publication Critical patent/CA2229096C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02Means for indicating or recording specially adapted for thermometers
    • G01K1/026Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • 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
    • G05D23/1927Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1932Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of a plurality of spaces
    • 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
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

Abstract

A thermostat includes a first temperature sensor integral with the thermostat and at least one and typically three remotely positioned temperature sensors.
Switches are provided to select which one or more temperature sensors are employed to provide an averaged measured temperature. Voltages representative of the temperature ambient to each diversely placed sensor are applied to separate inputs to an analog multiplexer which transfers a single voltage to an analog-to-digital converter in accordance with address codes received from a processor.
The output of the A-D converter, a digital count representative of the temperature measured by the currently selected sensor, is read by the processor and temporarily saved. Then, the next selected sensor is similarly processed. When all the selected sensors have been processed, the resulting counts are averaged, and the result is conventionally processed, as by passing it through a conversion algorithm, to obtain the averaged temperature which is employed as the measured temperature and compared against a current reference temperature to determine control signals to be sent to one or more environmental modification units such as a heater and/or an air conditioner.
CA002229096A 1997-02-19 1998-02-09 Thermostat with remote temperature sensors and incorporating a measured temperature feature for averaging ambient temperatures at selected sensors Expired - Fee Related CA2229096C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/801,346 1997-02-19
US08/801,346 US5803357A (en) 1997-02-19 1997-02-19 Thermostat with remote temperature sensors and incorporating a measured temperature feature for averaging ambient temperatures at selected sensors

Publications (2)

Publication Number Publication Date
CA2229096A1 true CA2229096A1 (en) 1998-08-19
CA2229096C CA2229096C (en) 2005-04-19

Family

ID=25180863

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002229096A Expired - Fee Related CA2229096C (en) 1997-02-19 1998-02-09 Thermostat with remote temperature sensors and incorporating a measured temperature feature for averaging ambient temperatures at selected sensors

Country Status (2)

Country Link
US (1) US5803357A (en)
CA (1) CA2229096C (en)

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