Dampers placed on the half face of the inlet and the outlet of side-by-side airflow energy recovery sections used as recirculation path
An air handler includes a housing with a heat exchanger core. The housing includes a faceplate, a roof panel, a base panel, a first side panel, and a second side panel. A first tunnel and a second tunnel are connected to the housing at the faceplate. A septum protrudes from the faceplate and connects the core at a front edge. The air handler further includes a first recirculation path and a second recirculation path inside the housing. The first and second recirculation paths are defined by the septum, the housing, and the core. The first and second recirculation paths are configured to direct a portion of airflow from the first tunnel to the second tunnel. The air handler further includes a first damper and a second damper disposed on the faceplate and configured to obstruct the first recirculation path and the second recirculation path respectively.
1. An air handler for an HVACR system, comprising:
a housing having a faceplate, a roof panel, a base panel, a first side panel, and a second side panel;
a septum protruding into the housing from a first side of the faceplate;
a core disposed within the housing and having a front edge connected to an edge of the septum, a top edge connected to the roof panel, a bottom edge connected to the base panel, a first side plate connected to the first side panel, and a second side plate connected to the second side panel;
a first tunnel connected to a first area on the faceplate from a second side of the faceplate, wherein the second side is opposite to the first side of the faceplate;
a second tunnel connected to a second area of the faceplate from the second side, wherein the second area is disjointed from the first area;
a first recirculation path defined by the faceplate, the roof panel, the septum, the first side panel, the second side panel, and the core and configured to channel a first portion of airflow from the first tunnel to the second tunnel;
a second recirculation path defined by the faceplate, the septum, the base panel, the first side panel, the second side panel, and the core and configured to channel a second portion of the airflow from the first tunnel to the second tunnel;
a first damper disposed in the first area of the faceplate and configured to obstruct the first recirculation path;
a second damper disposed in the second area of the faceplate and configured to obstruct the second recirculation path;
a first opening disposed in the first area of the faceplate and connecting the first tunnel to the second recirculation path; and
a second opening disposed in the second area of the faceplate and connecting the second tunnel to the first recirculation path.
2. The air handler of claim 1 , wherein
the second damper is disposed adjacent to the first side panel and the roof panel, and
the first damper is disposed adjacent to the second side panel and the base panel.
3. The air handler of claim 2 , wherein
the second opening is adjacent to the first side panel and the base panel, and
the first opening is adjacent to the second side panel and the roof panel.
4. The air handler of claim 1 , wherein
the first tunnel is an indoor air inlet from a controlled space, and
the second tunnel is an indoor air return to the controlled space.
5. The air handler of claim 1 , wherein
the core includes a fixed plate heat exchanger or a rotary type wheel heat exchanger.
6. The air handler of claim 5 , wherein
the core is in a horizontal configuration substantially parallel to the septum, and
when the core includes the fixed plate heat exchanger, the fixed plate heat exchanger includes heat transfer plates that are in a vertical configuration, and
when the core includes the rotary type wheel heat exchanger, the rotary type wheel heat exchanger includes at least two side-by-side wheels.
7. The air handler of claim 1 , wherein
the first tunnel and the second tunnel are separated by a middle of unit wall that is substantially perpendicular to the faceplate on a first plane and substantially perpendicular to the septum on a second plane, wherein the second plane is substantially perpendicular to the first plane.
8. The air handler of claim 1 , wherein
the first damper includes a plurality of sections that are configured to open or close independently among one another or in unison, and
the second damper includes a plurality of sections that are configured to open or close independently among one another or in unison.
9. The air handler of claim 1 , wherein
the first damper obstructs the first portion of the airflow from entering the first recirculation path when the first damper is in a closed position.
10. The air handler of claim 1 , wherein
the second damper obstructs the second portion of the airflow from entering the second tunnel when the second damper is in a closed position.
11. The air handler of claim 1 , wherein
the first portion of the airflow is recirculated to the second tunnel through the second opening when the first damper is in an open position, and
the second portion of the airflow is recirculated to the second tunnel through the first opening and the second recirculation path when the second damper is in an open position.
12. The air handler of claim 1 , wherein
the airflow entered the first tunnel from a controlled space is recirculated into the controlled space when the first and the second dampers are in their open positions.
13. The air handler of claim 1 , wherein
the core further includes at least one of a bypass damper, or a defrost damper.
14. A method of providing recirculation capabilities using an air handler with a core, comprising:
opening a first damper and a second damper;
receiving vented indoor air from a controlled space through a first tunnel;
channeling a first portion of the vented indoor air from the first tunnel to a second tunnel through the first damper, a first recirculation path, and a second opening;
channeling a second portion of the vented indoor air from the first tunnel to the second tunnel through a first opening, a second recirculation path, and the second damper; and
returning the first portion of the vented indoor air and the second portion of the vented indoor air from the second tunnel into the controlled space, wherein
the air handler has a housing that includes a faceplate, a roof panel, a base panel, a first side panel, and a second side panel,
the first recirculation path and the second recirculation path are separated by a septum protruding into the housing from a first side of the faceplate,
the housing contains the core having a top edge connected to the roof panel, a bottom edge connected to the base panel, a front edge connected to the septum, a first side plate connected to the first side panel, and a second side plate connected to the second side panel,
the first tunnel connects to the faceplate at a first area of a second side of the faceplate, wherein the second side is opposite to the first side of the faceplate,
the second tunnel connects to the faceplate at a second area of the first side of the faceplate, wherein the second area is disjointed from the first area,
the first damper and the first opening are disposed in the first area on the faceplate,
the second damper and the second opening are disposed in the second area on the faceplate,
the first recirculation path is defined by the base panel, the faceplate, the first side panel, the second side panel, the septum, and the core, and
the second recirculation path is defined by the roof panel, the faceplate, the first side panel, the second side panel, the septum, and the core.
15. The method of claim 14 further comprising:
closing the first damper and the second damper;
obstructing the vented indoor air in the first tunnel from entering into the first recirculation path;
channeling the vented indoor air in the first tunnel into the second recirculation path through the first opening;
channeling the vented indoor air in the second recirculation path into the core;
channeling fresh air into the core;
exchanging energy in the core between the vented indoor and the fresh air;
channeling the fresh air in the core into the first recirculation path;
obstructing the fresh air in the first recirculation path from entering into the first tunnel;
channeling the fresh air in the first recirculation path into the second tunnel through the second opening;
exhausting the vented indoor air from the core after exchanging energy; and
channeling the fresh air from the second tunnel to the controlled space.
16. The method of claim 14 , wherein
the second damper is disposed adjacent to the first side panel and the roof panel, and the first damper is disposed adjacent to the second side panel and the base panel, and the first opening is adjacent to the second side panel and the roof panel, and the second opening is adjacent to the first side panel and the base panel.
17. The method of claim 14 , wherein
the first tunnel is an indoor air inlet from the controlled space, and
the second tunnel is an indoor air return to the controlled space.
18. The method of claim 14 , wherein
the core includes a fixed plate heat exchanger or a rotary type wheel heat exchanger.
19. The method of claim 14 , wherein
the core is in a horizontal configuration substantially parallel to the septum, and
when the core includes the fixed plate heat exchanger, the fixed plate heat exchanger includes heat transfer plates that are in a vertical configuration, and
when the core includes the rotary type wheel heat exchanger, the rotary type wheel heat exchanger includes at least two side-by-side wheels.
20. The method of claim 14 , wherein the first tunnel and the second tunnel are separated by a middle of unit wall that is substantially perpendicular to the faceplate on a first plane and substantially perpendicular to the septum on a second plane, wherein the second plane is substantially perpendicular to the first plane.