Electronic multi-zone timed temperature control apparatus
First Claim
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1. Timed temperature control apparatus for a zone comprising:
- clock means producing time output over a repetitive time cycle;
time display means responsive to said time output to display current time;
digital logic circuit means responsive to said timed output alternately producing a day mode status output and a night mode status output;
a temperature set means providing a different temperature set output for each said day modes and night modes, each temperature set being variable and preset to a selected temperature for that mode;
temperature sensing and load control means including a sensing circuit portion having input terminals to which a temperature sensor for the zone is connected, each said sensing circuit portion having switching means responsive to said day and night mode status outputs from said temperature set outputs from said temperature set means to establish a set temperature for each mode, said temperature sensing and load control means including a load control portion with a comparator for comparing the relative magnitudes of the sensed temperature output and coupled to output terminals to which a load device for the zone is connected whereby to continuously measure the temperature in said zone during the day and during the night to actuate a load control device when the temperature drops below or goes above a selected temperature setting; and
temperature display means responsive to the temperature sensed output of said sensing circuit portion to display the temperature of the zone, said temperature sensor being a resistance-type RTD platinum film.
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Abstract
The problem of adequate flexibility and reliability in apparatus for controlling temperatures in a plurality of zones is solved by a clock and digital logic circuits, together with a temperature sensing circuit portion effective in combination with platinum film-type temperature sensors, which produce effective sensing over a wide range of temperatures. The control apparatus automatically effects two temperature sets per twenty-four hour period for each zone with an optional temperature set for weekends for all zones and has a display of current time and a display of temperature for each zone.
18 Citations
28 Claims
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1. Timed temperature control apparatus for a zone comprising:
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clock means producing time output over a repetitive time cycle; time display means responsive to said time output to display current time; digital logic circuit means responsive to said timed output alternately producing a day mode status output and a night mode status output; a temperature set means providing a different temperature set output for each said day modes and night modes, each temperature set being variable and preset to a selected temperature for that mode; temperature sensing and load control means including a sensing circuit portion having input terminals to which a temperature sensor for the zone is connected, each said sensing circuit portion having switching means responsive to said day and night mode status outputs from said temperature set outputs from said temperature set means to establish a set temperature for each mode, said temperature sensing and load control means including a load control portion with a comparator for comparing the relative magnitudes of the sensed temperature output and coupled to output terminals to which a load device for the zone is connected whereby to continuously measure the temperature in said zone during the day and during the night to actuate a load control device when the temperature drops below or goes above a selected temperature setting; and temperature display means responsive to the temperature sensed output of said sensing circuit portion to display the temperature of the zone, said temperature sensor being a resistance-type RTD platinum film. - View Dependent Claims (2, 3, 4)
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5. Timed temperature control apparatus for a plurality of independent zones comprising:
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clock means producing time output over a repetitive time cycle; first display means responsive to said time output to display current time; digital logic circuit means responsive to said timed output alternately producing a day mode status output, a night mode status output and optionally a weekend mode status output; a temperature set means providing a different temperature set output for each said weekend mode status, day mode status and night mode status, each temperature set being variable and preset to a selected temperature for that mode, said temperature set means having a first temperature selector for each zone for setting the temperature of the day mode over a range of temperature settings, a second temperature selector for each zone for setting the temperature of the night mode over a range of temperature settings, and a third temperature selector for all zones setting the temperature of the weekend mode over a range of temperature settings; temperature sensing and load control means for each zone, including a sensing circuit portion for each zone having input terminals to which a temperature sensor for an associated zone is connected for each zone being controlled, each said sensing circuit portion having switching means responsive to said day, night and weekend mode status outputs from said control logic and said temperature set outputs from said temperature set means to establish a set temperature for each mode, said temperature sensing and load control means including a load control portion with a comparator for comparing the relative magnitudes of the sensed temperature output and coupled to output terminals to which a load device for the associated zone is connected whereby to continuously measure the temperature in each zone during the day, during the night and optionally during the weekend and compare the temperature measurements with the settings in said first, second and third selectors and to actuate a load control device when the temperature drops below or goes above a selected temperature setting of said selectors; data acquisition means responsive to a temperature output from each of said temperature sensing portions to address each temperature sensor for each zone and provide a first output corresponding to the zone and a second output corresponding to the associated measured temperature for that zone, said data acquisition means having a zone advance actuator to rapidly advance the zones to a selected zone; zone display means responsive to said first output for displaying the zone monitored; and temperature display means responsive to said second output to display the temperature of the zone indicated by said zone display means. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Timed temperature control apparatus comprising:
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clock means producing time output over a repetitive time cycle; first display means responsive to said time output to display current time; register means responsive to said time output arranged for storing a selected day begin time in minute increments over a selected day set time range for a day mode and a selected night begin time in minute increments over a night set time range for a night mode; loading means responsive to said time output having a day begin selector and a night begin selector, said loading means coupled to said register to load selected day begin and night begin times into said register means; comparison logic means responsive to the output of said registers and said time output for comparing stored time with current time and producing a day mode status output for one portion of the time cycle and night mode status output for another portion of the time cycle; day of week counter means responsive to said time output detecting the passage of twenty-four hour time intervals and producing a day of week output and a weekend mode status output for a weekend mode, said counter means having a day advance portion including an advance actuator for rapidly advancing the days; second display means responsive to said day of week output for indicating the current day of the week; control logic means responsive to said day mode status output, night mode status output and weekend mode status output to produce a mode status output indicating that one of said modes is in effect at one time, said control logic means having a weekend enable selector to selectively effect said weekend mode as desired; a temperature set means providing a different temperature set output for each of said weekend modes, day modes and night modes, each temperature set being variable and related to a preselected temperature setting for that mode, said temperature set means having a first temperature selector for each zone for setting the temperature of the day mode over a range of temperature settings, a second temperature selector for each zone for setting the temperature of the night mode over a range of temperature settings and a third temperature selector for all zones for setting the temperature of the weekend mode over a range of temperature settings; temperature sensing and load control means for each zone including a sensing circuit portion for each zone having input terminals to which a temperature sensor for an associated zone is connected for each zone being controlled, each said sensing circuit portion having analog switching means responsive to said day, night and weekend mode status outputs from said control logic and said temperature set outputs from said temperature set means to establish a set temperature for each mode, said temperature sensing and load control means including a load control portion with a comparator for comparing the relative magnitudes of the sensed temperature output and coupled to output terminals to which a load device for the associated zone is connected whereby to continuously measure the temperature in each zone during the day, during the night and optionally during the weekend and compare the temperature with the settings in said first, second and third selectors and to actuate a load control device when the temperature drops below or goes above a selected temperature setting of said selectors, said temperature sensor and control means having an indicator for each zone for indicating the heat is on in one of said zones; data acquisition means responsive to a temperature output from each of said temperature sensing portions to address each temperature sensor for each zone and provide a first output corresponding to the zone and a second output corresponding to the associated measured temperature for that zone, said data acquisition means having a zone advance actuator to rapidly advance the zones to a selected zone; zone display means responsive to said first output for displaying the zone monitored; and temperature display means responsive to said second output to display the temperature of the zone indicated by said zone display means. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification