Heating, ventilation, and air conditioning control system

Patent metadata

Field	Value
Publication number	US-2018231260-A1
Application number	US-201815897890-A
Country	US
Kind code	A1
Filing date	Feb 15, 2018
Priority date	Feb 15, 2017
Publication date	Aug 16, 2018
Grant date	—

Abstract

A heating, ventilation, and air conditioning (HVAC) system. The HVAC system includes a sensor that detects a temperature of a heater of a heating component and emits a signal indicative of the temperature. A flow management device controls a flow of electricity or fuel from a power source to the heating component. A controller receives the signal from the sensor and operates the flow management device to block the flow of electricity or fuel to the heating component when the signal is indicative of the temperature being above a set point.

First claim

1 . A heating, ventilation, and air conditioning (HVAC) system, comprising:
a sensor configured to detect a temperature of a heater of a heating component and to emit a signal indicative of the temperature; a flow management device configured to control a flow of electricity or fuel from a power source to the heating component; and a controller configured to receive the signal from the sensor and operate the flow management device to block the flow of electricity or fuel to the heating component when the signal is indicative of the temperature being above a set point.

2 . The HVAC system of claim 1 , comprising the heater, wherein the heater comprises an electric resistance-heating coil and wherein the flow management device comprises a switch configured to block the flow of electricity by disconnecting the resistance-heating coil from the power source based on instructions from the controller.

3 . The HVAC system of claim 1 , wherein the sensor is an infrared sensor.

4 . The HVAC system of claim 1 , comprising an airflow sensor configured to detect an airflow through the HVAC system and to emit a signal indicative of the airflow.

5 . The HVAC system of claim 4 , wherein the controller is configured to receive the signal indicative of the airflow and to activate the flow management device to block the flow of electricity or fuel in response to the airflow being less than a threshold airflow.

6 . The HVAC system of claim 4 , wherein the airflow sensor is upstream from the heater relative to an airflow path through the HVAC system.

7 . The HVAC system of claim 1 , comprising a pressure sensor configured to detect an air pressure in the HVAC system and to emit a signal indicative of the air pressure.

8 . The HVAC system of claim 7 , wherein the pressure sensor is upstream from the heater relative to an airflow path through the HVAC system.

9 . The HVAC system of claim 1 , comprising the heater and the heating component, wherein the heater comprises a heat exchanger and the heating component comprises a burner assembly, and wherein the flow management device comprises a valve configured to block the flow of fuel by closing based on instructions from the controller.

10 . A heating, ventilation, and air conditioning (HVAC) system, comprising:
a sensor configured to detect a temperature of a heat exchanger in a furnace system and to emit a signal indicative of the temperature; a switch or valve configured to limit a flow of fuel to the furnace system; and a controller configured to receive the signal indicative of the temperature and to activate the switch or valve to limit the flow of the fuel to the furnace system in response to the signal being indicative of the temperature exceeding a threshold value.

11 . The HVAC system of claim 10 , wherein the switch or valve is configured to completely seal off the flow of the fuel in response to instructions from the controller.

12 . The HVAC system of claim 10 , wherein the sensor is an infrared sensor, and wherein the HVAC system further comprises an airflow sensor configured to detect an airflow through the HVAC system and to emit a signal indicative of the airflow.

13 . The HVAC system of claim 12 , wherein the controller is configured to receive the signal indicative of the airflow and to activate the switch or valve to block the flow of the fuel to the furnace system in response to the airflow being less than a threshold airflow.

14 . The HVAC system of claim 10 , wherein the sensor is an infrared sensor and wherein the HVAC system further comprises a pressure sensor configured to detect an air pressure in the HVAC system and to emit a signal indicative of the air pressure.

15 . A heating ventilation and air conditioning (HVAC) system, comprising:
a sensor configured to detect a temperature of an HVAC component and to emit a signal indicative of the temperature; a controller configured to receive the signal indicative of the temperature and to transmit a signal to block flow of fuel or electricity to the HVAC system in response to the temperature being in excess of a threshold temperature.

16 . The HVAC system of claim 15 , wherein the controller is configured to emit a warning signal when the temperature is in excess of the threshold temperature.

17 . The HVAC system of claim 16 , wherein the warning signal comprises an audible tone, a written message, an audible message, a flashing light, or a combination thereof.

18 . The HVAC system of claim 16 , comprising an electronic user device configured to receive the warning signal.

19 . The HVAC system of claim 18 , wherein the electronic user device comprises a computer, a thermostat, or a mobile electronic device.

20 . The HVAC system of claim 15 , wherein the HVAC component comprises an electric resistance-heating coil, and wherein the controller is configured to transmit the signal to open a switch to block flow of electricity to the electric resistance-heating coil.

21 . The HVAC system of claim 15 , wherein the HVAC component comprises a burner, and wherein the controller is configured to transmit the signal to close a valve to block flow of fuel to the burner.

22 . The HVAC system of claim 15 , wherein the sensor is an infrared sensor.

23 . The HVAC system of claim 15 , wherein the threshold temperature is a reaction temperature for a refrigerant of the HVAC system.

Assignees

• Johnson Controls Tech Co

Inventors

• Wilson Stephen C

Classifications

• F24D19/1096 Primary

  for electric heating systems · CPC title

• G01J5/0044

  Furnaces, ovens, kilns (G01J5/0007, G01J5/004 take precedence) · CPC title

• G05B2219/2614

  HVAC, heating, ventillation, climate control · CPC title

• G05B19/042

  using digital processors (G05B19/05 takes precedence) · CPC title

• G08B21/182

  Level alarms, e.g. alarms responsive to variables exceeding a threshold · CPC title