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US 11,441,809 B2Granted
Auxiliary economizer for an HVAC system
AssigneeJohnson Controls Tyco IP Holdings LLP
InventorsRammohan Sethuraj, Pankaj D. Nalamwar, Shashank B. Kadam, Sriram Ramanujam
Life of this patent
Estimating the term…
Abstract
A heating, ventilation, and/or air conditioning (HVAC) unit may include a supply fan section having a supply fan disposed therein to force a supply air flow through a discharge plenum of the HVAC unit. The HVAC unit may also include an economizer positioned adjacent the supply fan section to receive an outdoor air flow and direct the outdoor air flow into the supply fan section.
Claims25
A heating, ventilation, and/or air conditioning (HVAC) unit, comprising:
- a supply fan configured to force a supply air flow through a discharge plenum of the HVAC unit;
- an economizer positioned proximate the supply fan, wherein the economizer is configured to receive an outdoor air flow and direct the outdoor air flow toward the supply fan, such that the outdoor air flow bypasses an evaporator coil of the HVAC unit;
- and
- a mixing chamber having a return air inlet and an outdoor air intake, wherein the mixing chamber is fluidly coupled to the supply fan, wherein the mixing chamber is configured to mix a first air flow from the return air inlet and a second air flow from the outdoor air intake, and wherein the evaporator coil is disposed downstream of the mixing chamber and upstream of the supply fan.
1 more element
An economizer, comprising:
- an air inlet configured to receive an environmental air flow;
- an air outlet configured to direct the environmental air flow into a heating, ventilation, and/or air conditioning (HVAC) unit proximate a blower section of the HVAC unit, such that the environmental air flow bypasses an evaporator coil of the HVAC unit prior to being discharged via a plenum section of the HVAC unit;
- a damper configured to regulate a flow rate of the environmental air flow from the air inlet to the air outlet;
- and
- a controller configured to regulate a position of the damper, wherein the controller is configured to open the damper when the HVAC unit is operated at a first conditioning capacity utilization less than a threshold value, and the controller is configured to open a second damper of a second economizer of the HVAC unit when the HVAC unit is operated at a second conditioning capacity utilization greater than the threshold value.
2 more elements
A heating, ventilation, and/or air conditioning (HVAC) unit, comprising:
- a first economizer configured to direct a first environmental air flow into an air flow path of the HVAC unit;
- a second economizer configured to direct a second environmental air flow into the air flow path;
- and
- a conditioning section including an evaporator coil, wherein the conditioning section is disposed between the first economizer and the second economizer, relative to a direction of air flow through the air flow path, wherein the evaporator coil is configured to condition the air flow.
1 more element
Dependencies are inferred from the claim text.