US 12,135,175 B2
Fluid control for a variable flow fluid circuit in an HVACR system
Michael C. A. Schwedler, Onalaska, WI (US)
Assigned to TRANE INTERNATIONAL INC., Davidson, NC (US)
Filed by TRANE INTERNATIONAL INC., Davidson, NC (US)
Filed on Jun. 20, 2023, as Appl. No. 18/338,063.
Application 18/338,063 is a continuation of application No. 16/233,949, filed on Dec. 27, 2018, abandoned.
Prior Publication US 2023/0332850 A1, Oct. 19, 2023
Int. Cl. F28F 27/02 (2006.01)
CPC F28F 27/02 (2013.01) [F28F 2250/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of controlling a heating, ventilation, air conditioning, and refrigeration (HVACR) unit in an HVACR system that includes the HVACR unit through which a process fluid can be pumped to meet a temperature control demand, comprising:
monitoring, by a controller, a flowrate of the process fluid through the HVACR unit;
in response to the monitoring:
when the flowrate of the process fluid is greater than a minimum flowrate threshold, providing the process fluid to one or more terminals in the HVACR system via the HVACR unit according to the temperature control demand, and disabling a bypass flow of the process fluid through a bypass line configured to bypass a selected terminal of the plurality of terminals by changing a state of a valve fluidly connected to the bypass line and the selected terminal to a flow disabled state;
when the flowrate of the process fluid is below the minimum flowrate threshold, enabling, by the controller, the bypass flow of the process fluid through the bypass line by changing the state of the valve fluidly connected to the bypass line and to the selected terminal to a flow enabled state, and
when the changing of the state of the valve is performed, initiating a timer, wherein the timer completes before the state of the valve can be changed again.