# US 12,111,058 B1 · Heated door glass for oven > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,058 B1 - Document ID: US12111058B1 - Status: Granted - Kind: B1 - Application number: 18/228,961 - Filed: 2023-08-01 - Granted: 2024-10-08 - Earliest claimed: 2023-08-01 - Assignees: Sub-Zero Group, Inc. - Applicants: Sub-Zero Group, Inc. - Inventors: Sebastian Janowski; Michael Wipperfurth - Web page: https://patentgrep.com/patent/US12111058B1 ## CPC - F24C 15/04: with transparent panels - H05B 3/86: the heating conductors being embedded in the transparent or reflecting material {(H05B3/845 takes precedence)} - H05B 1/0263: {Ovens} - H05B 3/84: Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields - H05B 6/06: Control, e.g. of temperature, of power - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A controller is provided to operate a glass heater mounted in a door of an oven to heat glass mounted to the door that provides a view into the oven cavity. (A) An indicator of an oven cavity temperature value or an oven temperature setpoint value is received. The oven cavity temperature value indicates a current temperature in an oven cavity, and the oven temperature setpoint value indicates a temperature set point. (B) A voltage value or a current value is determined based on the oven cavity temperature value or the oven temperature setpoint value. (C) The determined voltage value or the determined current value is provided to operate the glass heater. (D) (A) through (C) are repeated until the oven is switched to an off-state or the oven cavity temperature value is greater than or equal to the oven temperature setpoint value. ## Claims ### Claim 1 A non-transitory computer-readable medium having stored thereon computer-readable instructions that when executed by a processor cause the processor to: (A) receive an indicator of an oven cavity temperature value or an oven temperature setpoint value, wherein the oven cavity temperature value indicates a current temperature in an oven cavity of an oven, wherein the oven temperature setpoint value indicates a temperature set point for the oven; (B) determine a variable voltage value or a variable current value to be provided to operate a glass heater as a function of the indicated oven cavity temperature value or the indicated oven temperature setpoint value, wherein the glass heater is mounted to a door of the oven to heat glass mounted to the door, wherein the glass provides a view into the oven cavity; (C) control provision of the determined voltage value or the determined current value to operate the glass heater; and (D) repeat (A) through (C) until the oven is switched to an off-state. ### Claim 2 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein, in (D), (A) through (C) are repeated until the oven is switched to an off-state or the indicated oven cavity temperature value exceeds a predefined condensation temperature value. ### Claim 3 (depends on 2) The non-transitory computer-readable medium of claim 2, wherein, before (D), the computer-readable instructions further cause the processor to define the predefined condensation temperature value using an atmospheric pressure measured at the oven. ### Claim 4 (depends on 3) The non-transitory computer-readable medium of claim 3, wherein, before (B), the computer-readable instructions further cause the processor to: receive an indicator of an atmospheric pressure value, wherein the atmospheric pressure value indicates the atmospheric pressure measured at the oven. ### Claim 5 (depends on 4) The non-transitory computer-readable medium of claim 4, wherein, before (B), the computer-readable instructions further cause the processor to: receive an indicator of a glass temperature value, wherein the glass temperature value indicates a current glass temperature of the glass, wherein in (B), the variable voltage value or the variable current value is further determined using the indicated glass temperature value. ### Claim 6 (depends on 5) The non-transitory computer-readable medium of claim 5, wherein a proportional-integral-derivative controller is used to determine the variable voltage value or the variable current value to maintain the glass at or above the predefined condensation temperature value. ### Claim 7 (depends on 2) The non-transitory computer-readable medium of claim 2, wherein, before (B), the computer-readable instructions further cause the processor to: receive an indicator of a glass temperature value, wherein the glass temperature value indicates a current glass temperature of the glass, wherein, in (B), the variable voltage value or the variable current value is further determined using the indicated glass temperature value. ### Claim 8 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein, before (B), the computer-readable instructions further cause the processor to: receive an indicator of a glass temperature value, wherein the glass temperature value indicates a current glass temperature of the glass, wherein, in (B), the variable voltage value or the variable current value is further determined using the indicated glass temperature value. ### Claim 9 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein, in (B), the variable voltage value or the variable current value is further determined based on a cooking phase in combination with the indicated oven cavity temperature value or the indicated oven temperature setpoint value. ### Claim 10 (depends on 9) The non-transitory computer-readable medium of claim 9, wherein the cooking phase is either a preheat phase or a regulation phase, wherein the regulation phase is entered after the preheat phase completes when the oven cavity temperature value is greater than or equal to the indicated oven temperature setpoint value. ### Claim 11 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein the variable voltage value is determined using a predefined table, wherein the predefined table comprises a plurality of temperature range values, wherein each temperature range value of the plurality of temperature range values includes a minimum temperature value and a maximum temperature value, wherein a glass heater voltage value is associated with each temperature range value of the plurality of temperature range values, wherein the indicated oven cavity temperature value is used to select a temperature range value from the plurality of temperature range values using the indicated oven cavity temperature value being between the minimum temperature value and the maximum temperature value of a respective temperature range value, wherein the variable voltage value is determined from the glass heater voltage value associated with the selected temperature range value. ### Claim 12 (depends on 11) The non-transitory computer-readable medium of claim 11, wherein the glass heater voltage value is a percent of a predefined maximum voltage value. ### Claim 13 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein the variable voltage value is determined using a predefined equation that computes the variable voltage value using the indicated oven cavity temperature value. ### Claim 14 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein the variable voltage value is determined using a predefined table, wherein the predefined table comprises a plurality of temperature range values, wherein each temperature range value of the plurality of temperature range values includes a minimum temperature value and a maximum temperature value, wherein a glass heater voltage value is associated with each temperature range value of the plurality of temperature range values, wherein the indicated oven temperature setpoint value is used to select a temperature range value from the plurality of temperature range values using the indicated oven temperature setpoint value being between the minimum temperature value and the maximum temperature value of a respective temperature range value, wherein the variable voltage value is determined from the glass heater voltage value associated with the selected temperature range value. ### Claim 15 (depends on 14) The non-transitory computer-readable medium of claim 14, wherein the glass heater voltage value is a percent of a predefined maximum voltage value. ### Claim 16 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein the variable voltage value is determined using a predefined equation that computes the variable voltage value using the indicated oven temperature setpoint value. ### Claim 17 (depends on 1) The non-transitory computer-readable medium of claim 1, wherein, before (B), the computer-readable instructions further cause the processor to: receive an indicator that an on-demand mode is selected, wherein, when the indicator that the on-demand mode is selected is received, in (B), the variable voltage value or the variable current value is determined as a predefined maximum voltage value using the indicated oven cavity temperature value or the indicated oven temperature setpoint value. ### Claim 18 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein, in (D), (A) through (C) are repeated until the oven is switched to an off-state or the indicated oven cavity temperature value exceeds a predefined condensation temperature value. ### Claim 19 An oven door comprising: a wall, wherein the wall is mounted to an oven to define a moveable wall of an oven cavity, the wall comprising a panel frame comprising a frame wall that defines an aperture; a glass sheet mounted to the panel frame to cover the aperture, wherein the glass sheet provides a view into the oven cavity of the oven when the wall is in a closed position to define the oven cavity; and a glass heater connected to provide a voltage or a current to the glass sheet to heat the glass sheet; and a glass heater controller comprising a processor; and a non-transitory computer-readable medium operably coupled to the processor, the computer-readable medium having computer-readable instructions stored thereon that, when executed by the processor, cause the glass heater controller to (A) receive an indicator of an oven cavity temperature value or an oven temperature setpoint value, wherein the oven cavity temperature value indicates a current temperature in the oven cavity of the oven, wherein the oven temperature setpoint value indicates a temperature set point for the oven; (B) determine a variable voltage value or a variable current value to be provided to operate the glass heater as a function of the indicated oven cavity temperature value or the indicated oven temperature setpoint value; (C) control provision of the determined voltage value or the determined current value to operate the glass heater; and (D) repeat (A) through (C) until the oven is switched to an off-state. ### Claim 20 An oven comprising: a plurality of walls that form an oven cavity; a moveable wall, wherein the moveable wall is mounted to at least one wall of the plurality of walls, the moveable wall comprising a panel frame comprising a frame wall that defines an aperture; a glass sheet mounted to the panel frame to cover the aperture, wherein the glass sheet provides a view into the oven cavity when the moveable wall is in a closed position to define the oven cavity; and a glass heater connected to provide a voltage or a current to the glass sheet to heat the glass sheet; and a glass heater controller comprising a processor; and a non-transitory computer-readable medium operably coupled to the processor, the computer-readable medium having computer-readable instructions stored thereon that, when executed by the processor, cause the glass heater controller to (A) receive an indicator of an oven cavity temperature value or an oven temperature setpoint value, wherein the oven cavity temperature value indicates a current temperature in the oven cavity of the oven, wherein the oven temperature setpoint value indicates a temperature set point for the oven; (B) determine a variable voltage value or a variable current value to be provided to operate the glass heater as a function of the indicated oven cavity temperature value or the indicated oven temperature setpoint value; (C) control provision of the determined voltage value or the determined current value to operate the glass heater; and (D) repeat (A) through (C) until the oven is switched to an off-state.