Patent ID: 11867415
Assignee: JOHNSON CONTROLS TECHNOLOGY COMPANY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A heating, ventilation, and air conditioning (HVAC) system, comprising:
an HVAC unit comprising a refrigeration circuit and a first economizer;
a sensor configured to measure a refrigerant concentration external to the refrigeration circuit;
a controller communicatively coupled to the sensor and to the first economizer, wherein the controller is configured to control the first economizer to direct a first intake air flow into the HVAC unit, wherein the first intake air flow comprises a first flow of environmental air; and
a second economizer configured to direct a second intake air flow into the HVAC system, wherein the second intake air flow comprises a second flow of environmental air;
wherein the controller is configured to:
control the first economizer to manage the first flow of environmental air relative to a first flow of return air such that a first ratio of the first flow of environmental air to the first flow of return air is based on the refrigerant concentration measured by the sensor at refrigerant concentrations above a predetermined threshold concentration; and
control the second economizer to manage a second ratio of the second flow of environmental air relative to a second flow of return air based on the refrigerant concentration measured by the sensor.