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    THERMOSTAT WITH EXHAUST FAN CONTROL FOR AIR QUALITY AND HUMIDITY CONTROL
    12.
    发明申请
    THERMOSTAT WITH EXHAUST FAN CONTROL FOR AIR QUALITY AND HUMIDITY CONTROL 审中-公开

    公开(公告)号：US20180299150A1

    公开(公告)日：2018-10-18

    申请号：US15953166

    申请日：2018-04-13

    Applicant: Johnson Controls Technology Company

    Inventor： Michael J. Ajax ,  Joseph R. Ribbich ,  Nicholas S. Van Derven

    IPC: F24F11/00 ,  F24F11/56 ,  F24F11/61 ,  G05B19/042

    Abstract: A system for controlling air quality of a building space includes an air quality sensor configured to sense the air quality of the building space, an exhaust fan configured to exhaust air from inside the building space to outside the building space, a switch device configured to control the exhaust fan to exhaust the air from inside the building space to outside the building space, and a controller comprising a processing circuit. The processing circuit is configured to determine an air quality level of the building space based on the air quality sensor, determine whether the air quality level is less than an air quality threshold, and cause the switch device to operate the exhaust fan to exhaust air from inside the building space to outside the building space in response to a determination that the air quality level is less than the air quality threshold.

    THERMOSTAT WITH ENERGY MODELING
    15.
    发明申请
    THERMOSTAT WITH ENERGY MODELING 有权

    公开(公告)号：US20210123626A1

    公开(公告)日：2021-04-29

    申请号：US17140957

    申请日：2021-01-04

    Applicant: Johnson Controls Technology Company

    Inventor： Nathan M. Zimmerman ,  Michael J. Ajax

    IPC: F24F11/46 ,  G05B17/02 ,  G05B15/02 ,  G05D23/19 ,  F24F11/64 ,  F24F11/65 ,  F24F11/58 ,  F24F11/61 ,  G05B13/04

    Abstract: A thermostat for a building space can include a processing circuit. The processing circuit can cause building equipment to heat or cool the building space via one or more heating outputs or one or more cooling outputs. The processing circuit can record the length of time that the processing circuit causes the building equipment to heat or cool the building space. The processing circuit can simulate a thermal plant model to determine a simulated runtime, wherein the thermal plant model is a thermal plant model of the building space and the building equipment. The processing circuit can determine a number of hours saved based on the simulated runtime and the recorded length of time.

    Feedback control system with normalized performance indices for setpoint alarming
    17.
    发明授权
    Feedback control system with normalized performance indices for setpoint alarming 有权

    公开(公告)号：US10579023B2

    公开(公告)日：2020-03-03

    申请号：US16230795

    申请日：2018-12-21

    Applicant: Johnson Controls Technology Company

    Inventor： Timothy I. Salsbury ,  Carlos Felipe Alcala Perez ,  Michael J. Ajax

    IPC: G05B11/42 ,  F24F11/62 ,  F24F11/30

    Abstract: A plant includes equipment that operate to affect a variable state or condition of the plant in response to a control signal. A feedback controller monitors a process variable received via a feedback signal from the plant and uses an error signal representing a setpoint error between the process variable and a setpoint to generate the control signal for the plant. An exponentially-weighted moving average (EWMA) calculator generates EWMA values based on the setpoint error. A normalized index generator uses the EWMA values to calculate a normalized performance index. A threshold generator generates a threshold based on a first alarm parameter κ representing a normalized magnitude of the setpoint error and a second alarm parameter η representing a normalized duration that the setpoint error has persisted. An alarm manager generates an alarm in response to the normalized performance index crossing the threshold.

    SYSTEMS AND METHODS FOR HEAT RISE COMPENSATION
    18.
    发明申请
    SYSTEMS AND METHODS FOR HEAT RISE COMPENSATION 审中-公开

    公开(公告)号：US20190277525A1

    公开(公告)日：2019-09-12

    申请号：US16424821

    申请日：2019-05-29

    Applicant: Johnson Controls Technology Company

    Inventor： Michael J. Ajax ,  Justin J. Seifi

    IPC: F24F11/30 ,  F24F11/00 ,  F24F11/523 ,  F24F11/54 ,  F24F11/58 ,  F24F11/64 ,  F24F11/65 ,  F24F11/88 ,  G05B19/042

    Abstract: A HVAC controller includes a housing and one or more heat-generating components contained within the housing. The heat-generating components cause a temperature inside the housing to exceed a temperature outside the housing. The controller includes a temperature sensor configured to measure the temperature inside the housing and a controller event detector configured to detect, for at least one of the heat-generating components, a controller event that generates heat inside the housing. The controller further includes a temperature compensation module configured to identify a steady-state temperature gain associated with the detected controller event, to calculate a temperature offset using a summation of the steady-state temperature gain, to determine the temperature of the building zone outside the housing by subtracting the temperature offset from the temperature measured inside the housing, and to store the temperature offset.

    Systems and methods for heat rise compensation
    19.
    发明授权
    Systems and methods for heat rise compensation 有权

    公开(公告)号：US10317862B2

    公开(公告)日：2019-06-11

    申请号：US15008318

    申请日：2016-01-27

    Applicant: Johnson Controls Technology Company

    Inventor： Michael J. Ajax ,  Justin J. Seifi

    IPC: G05B15/02 ,  F24F3/044 ,  G05D23/19 ,  F24F11/30 ,  F24F11/62 ,  F24F110/10 ,  F24F110/20

    Abstract: A HVAC controller includes a housing and one or more heat-generating components contained within the housing. The heat-generating components cause a temperature inside the housing to exceed a temperature outside the housing. The controller includes a temperature sensor configured to measure the temperature inside the housing and a controller event detector configured to detect, for each of the heat-generating components, a controller event that generates heat inside the housing. The controller further includes a temperature compensation module configured to identify a steady-state temperature gain associated with each of the detected controller events, to calculate a temperature offset using a summation of the steady-state temperature gains, and to determine the temperature of the building zone outside the housing by subtracting the temperature offset from the temperature measured inside the housing.

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