US20190078816A1

US20190078816A1 - Convertible case horizontal refrigeration coil

Info

Publication number: US20190078816A1
Application number: US15/698,947
Authority: US
Inventors: John Raymond Edens; Patrick W. Van Deventer
Original assignee: Trane International Inc
Current assignee: Trane International Inc
Priority date: 2017-09-08
Filing date: 2017-09-08
Publication date: 2019-03-14

Abstract

An evaporator coil and drain pan assembly that can be converted between horizontal-left and horizontal-right orientations by 180 degree rotation of the assembly, which includes two drain pans located opposite one another, a dedicated horizontal refrigeration coil, and a refrigerant line, and wherein the fins of the coil run vertically from one drain pan to the opposite drain pan.

Description

FIELD

Embodiments disclosed herein relate generally to a heat exchange system. Specifically, the embodiments disclosed herein relate to an evaporator and a case for the evaporator wherein a horizontal V-coil with vertical fins has drain pans allowing for multiple configurations of the coil.

BACKGROUND

HVACR systems, such as home furnaces with air conditioning units, are used to cool airflow distributed within a structure. Some HVACR systems, for example those for smaller buildings such as residences, cool the airflow using a refrigeration coil such as an evaporator coil.
Current evaporator coil designs are installed in HVACR systems in a particular orientation, such as “horizontal left,” “horizontal right,” or vertical orientations, with the direction of airflow with respect to a front side having the refrigerant line connecting the coil to the rest of a compressor system. The shape of the coil may be a V-shape, which may be referred to as a V-coil or an A-coil depending on the orientation of the coil.
When the airflow being cooled is humid, water may condense on the evaporator coil. The condensate may drip or pool, and contact the support structures or the duct system, possibly damaging the structure or components of the structure. To capture and direct the condensate, a drain pan may be included, positioned below the evaporator coil when the coil is installed.
Coil designs may be optimized for particular orientations and directions of airflow, or designed to offer consistent though less efficient performance in a variety of orientations. Where a coil is optimized for a particular type of airflow, installers may be limited in the placement and orientation of a furnace in order to install the coil in its optimal configuration while connecting to the refrigeration line. In addition to reduced efficiency compared to airflow-specific dedicated coil designs, multi-position coil designs may require additional swapping of components or parts or use of different installation kits for each orientation, making their use more complex and costly for installers.

SUMMARY

Convertible-cased refrigeration coil and drain pan assemblies may include refrigeration coils for dedicated airflow directions, and drain pans which allow the assembly to be installed in multiple positions while collecting condensate. The refrigeration coil and drain pan assembly is such that the assembly may be switched between a horizontal-left dedicated coil or a horizontal-right dedicated coil by rotating the assembly about an axis parallel to the direction of airflow through the installed assembly. This enables the use of efficient designs for the refrigeration coil while allowing embodiments to be installed in a variety of configurations.
An HVACR refrigeration coil and drain pan assembly, including two drain pans, opposite one another, each having at least one drain connection, and a coil comprising a plurality of fins, the fins running in a direction from a first drain pan towards a second drain pan.
In an embodiment, a refrigerant line is connected to the refrigeration coil. The refrigerant line may exit the drain pan assembly on a side of the drain pan assembly between the two drain pans. The refrigerant line may be vertically biased towards one of the drain pans. In an embodiment, the refrigerant line exits the refrigeration coil and drain pan assembly on a side of the assembly and at a point equidistant from the two drain pans. In an embodiment, there is a removable access door on the side of the refrigeration coil and drain pan assembly that the refrigerant line exits the assembly.
In an embodiment, the fins run perpendicular to the plane of the drain pans.
In an embodiment, one or more of the drain pans comprises multiple levels.
In an embodiment, the refrigeration coil is a dedicated horizontal refrigeration coil.
An HVACR unit includes a blower providing an airflow and a refrigeration coil and drain pan assembly downstream from the blower with respect to the airflow, and the refrigeration coil and drain pan assembly includes first and second drain pans, located opposite one another and each having one or more drain connections, a refrigeration coil having fins running in a direction from one drain pan to the other, and a refrigerant line exiting the heat exchanger and drain pan assembly on a side.
In an embodiment, the refrigeration coil and drain pan assembly is installed in the HVACR unit such that a drain pan is at the bottom of the assembly.
In an embodiment, the airflow enters the refrigeration coil and drain pan assembly at an open end of the refrigeration coil side and travels towards a converged end of the refrigeration coil.
In an embodiment, the refrigeration coil and drain pan assembly may be installed in a horizontal-left position or a horizontal-right position with respect to the direction of the airflow from the perspective of the refrigerant line side of the assembly.
In an embodiment, there is a removable access door on the side of the refrigeration coil and drain pan assembly that the refrigerant line exits the assembly.
In an embodiment, the fins run perpendicular to the plane of the drain pans.
In an embodiment, one or more of the drain pans comprises multiple levels.
These refrigeration coil and drain pan assemblies and HVACR systems including these assemblies may allow installers more freedom in orienting and placing the HVACR systems within buildings, particularly where the systems must be in tight spaces such as closets or crawl spaces, while still enabling the use of refrigeration coils which are designed for superior performance in a particular orientation.

DRAWINGS

FIG. 1 shows a schematic of a refrigerant circuit.

FIG. 2 shows a view of a refrigeration coil installed in an HVACR unit.

FIG. 3 shows an example of a drain pan

FIG. 4A shows a top-down view of an example embodiment of an evaporator coil and drain pan assembly.

FIG. 4B shows a top-down view of the example embodiment of an evaporator coil and drain pan assembly shown in FIG. 4A when rotated around an axis parallel to the direction of entering airflow.

DETAILED DESCRIPTION

Refrigeration coils in HVACR units require a refrigerant line to be connected to a refrigerant circuit, for example by brazing. The position of the refrigerant line, in conjunction with the design of the refrigeration coil and the airflow direction required by the refrigeration coil design can constrain the options of HVACR system installers by requiring particular positions for the furnace and other HVACR system components to connect a refrigerant line to a refrigerant circuit and to have the proper airflow through the refrigeration coil. The furnace position required by the refrigeration coil may conflict with the limitations of small spaces such as, for example, basements or crawlspaces. A dedicated horizontal refrigeration coil assembly that provides adjustability and reversibility of the refrigerant line connection allows installers more options without having to compromise efficiency with a multi-position refrigeration coil design. The assembly may include two drain pans located opposite one another, allowing condensate to drain regardless of a 180 degree rotation of the assembly to present the refrigerant line on a particular side of the refrigeration coil assembly.
Refrigeration coils may be arranged in various configurations. These configurations include, for example, V-shaped coil assemblies (V-coils), A-shaped coil assemblies (A-coils) and horizontal coils which may be tilted V- or A-shapes. The evaporator coil configuration may be selected based on a direction of airflow to be directed through it, for example to optimize heat transfer to an airflow traveling through the coil in a particular direction. For example, the evaporator coil may be in a dedicated horizontal configuration which is similar to a V-shape laid down onto its back. V-shaped coil assemblies may have a converged end corresponding to the vertex of the V, and may have an open end corresponding to the open top of a V.
Refrigeration coil and drain pan assemblies which present a refrigerant line on a side of the refrigeration coil and drain pan assembly may be designed to have vertical or horizontal orientations, defined by the direction of the airflow through the refrigeration coil. The horizontal orientations may further have a direction, such as horizontal-left or horizontal-right, based on the direction of airflow from the perspective facing the refrigerant line.
FIG. 1 shows a refrigerant circuit which may include a refrigeration coil. FIG. 1 is a schematic diagram of a refrigerant circuit 2, according to an embodiment. The refrigerant circuit 2 generally includes a compressor 10, a condenser 4, an expansion device 6, and an evaporator 8. The compressor 10 can be, for example, a scroll compressor, a screw compressor, or a rotary vane compressor. The refrigerant circuit 2 is an example and can be modified to include additional components. For example, in an embodiment, the refrigerant circuit 2 can include other components such as, but not limited to, an economizer refrigeration coil, one or more flow control devices, a receiver tank, a dryer, a suction-liquid refrigeration coil, or the like.
The refrigerant circuit 2 can generally be applied in a variety of systems used to control an environmental condition (e.g., temperature, humidity, air quality, or the like) in a space (generally referred to as a conditioned space). Examples of such systems include, but are not limited to, HVACR systems.
The compressor 10, condenser 4, expansion device 6, and evaporator 8 are fluidly connected. The refrigerant circuit 2 can operate according to generally known principles. The refrigerant circuit 2 can be configured to heat or cool a process fluid such as air, such as in an air conditioner or heat pump.
In operation, the compressor 10 compresses a working fluid (e.g., a heat transfer fluid such as a refrigerant or the like) from a relatively lower pressure gas to a relatively higher-pressure gas. The relatively higher-pressure gas is also at a relatively higher temperature, which is discharged from the compressor 10 and flows through the condenser 4. The working fluid flows through the condenser 4 and rejects heat to a process fluid (e.g., air or the like), thereby cooling the working fluid. The cooled working fluid, which is now in a liquid form, flows to the expansion device 6. The expansion device 6 reduces the pressure of the working fluid. As a result, a portion of the working fluid is converted to a gaseous form. The working fluid, which is now in a mixed liquid and gaseous form flows to the evaporator 8. The working fluid flows through the evaporator 8 and absorbs heat from a process fluid such as air, heating the working fluid, and converting it to a gaseous form. The gaseous working fluid then returns to the compressor 10. The above-described process continues while the refrigerant circuit is operating, for example, in a cooling mode (e.g., while the compressor 10 is enabled).
Evaporator 8 may be a refrigeration coil located in the path of an airflow, for example located within an HVACR system such as a residential furnace assembly. In an embodiment, the airflow is a process fluid, and heat is transferred from the process fluid to a working fluid within the refrigeration coil such as a refrigerant, cooling the airflow. The airflow may then be distributed within a structure such as a home, providing air conditioning to the structure.
FIG. 2 shows a view of an HVACR unit. The HVACR unit may be a residential HVACR system. The HVACR unit includes furnace 20, which includes a blower (not shown). The blower directs airflow 32 through the refrigeration coil and drain pan assembly 22. The refrigeration coil and drain pan assembly 22 includes drain pans 24 and refrigeration coil 34. Refrigeration coil 34 may be, for example, a heat exchanger such as a tube-and-fin heat exchanger which includes tubes providing fluid communication between refrigerant line 30 and fins 28.
Refrigeration coil 34 may be a dedicated horizontal V-coil, arranged such that it appears as a V lying on a flat plane. The refrigeration coil 34 includes fins 28. The fins 28 may run in a direction from one drain pan to another. Where the drain pans are parallel to one another, the fins 28 may run in a direction perpendicular to the plane of each drain pan 24. For example, the fins 28 may run vertically when the refrigeration coil and drain pan assembly 22 is installed with the HVACR unit. This orientation allows condensate to run down the fins 28 into the drain pans 24, and the condensate may leave the drain pans via drain connections 26.
Refrigerant line 30 carries cooled working fluid, such as a refrigerant, into the refrigeration coil 34, where it transfers heat to an airflow 32 flowing through the refrigeration coil 34. A refrigerant return line 36 may return working fluid heated in the refrigeration coil 34 to continue flowing through the refrigerant circuit. The refrigerant line 30 may include an opening located near where the refrigerant line leaves the refrigeration coil assembly. The opening may be brazed to a line from a compressor system to put the refrigerant line 30 in fluid communication to receive a working fluid of the compressor system. In an embodiment, the refrigerant line 30 may be positioned proximate to an end of the refrigeration coil 34 and drain pan assembly 22 along an axis 46 in the direction of the airflow (e.g. arrow 32 shown in FIG. 2). This end of the refrigeration coil and drain pan assembly 22 may correspond to the end of a coil slab of refrigeration coil 34, and can be on either the incoming airflow side of the coil 34 or on the outgoing airflow side of the coil 34. In an embodiment, opening of the refrigerant line 30 is located equidistant from each of the drain pans 24, with a distance 40 between the opening of refrigerant line 30 and each of the drain pans 24.
The orientation of the refrigeration coil and drain pan assembly 22 may be defined based on the perspective of the side that the refrigerant line 30 leaves the assembly 22 and the direction of airflow 32 when the refrigeration coil and drain pan assembly 22 is viewed from that side. In the embodiment shown in FIG. 2, the refrigeration coil and drain pan assembly 22 is in the horizontal-right configuration, based on the direction of travel of airflow 32 from furnace 20 through and out of the refrigeration coil and drain pan assembly 22.
In the embodiment shown in FIG. 2, two drain pans 24 are located on a top and bottom side, respectively, of the refrigeration coil and drain pan assembly 22. Drain pans 24 each include one or more drain outlets 26. The one or more drain outlets 26 may be holes in the drain pans 24. The one or more drain outlets 26 may include an attachment point for a hose or other structure for carrying condensate away from the drain pan.
An access door 38 may be located on the side of the refrigeration coil and drain pan assembly 22 where the refrigerant line 30 exits the refrigeration coil and drain pan assembly 22. The access door 38 may be moved or removed from the refrigeration coil and drain pan assembly 22 to provide access to the interior of the assembly, including access to the refrigeration coil 34 for maintenance and the refrigerant line 30 for installation. In the embodiment shown in FIG. 2, the access door 38 is a removable panel. In an embodiment, the access door 38 is a hinged door which may be moved to provide access to the inside of the refrigeration coil and drain pan assembly. In an embodiment, the drain pans 24 may each have an access door 38. For example, the access door 38 on the drain pan 24 that is facing upwards as the refrigeration coil and drain pan assembly 22 is installed may be opened. Access doors 38 in drain pans 24 may be instead of or in addition to the access door 38 on the side of the unit having refrigerant line 30 as shown in FIG. 2. Such a configuration can allow access to the inside of the refrigeration coil and drain pan assembly 22 for installation, cleaning and maintenance.
The refrigeration coil and drain pan assembly 22 may be placed following furnace 20 with respect to the direction of airflow 32 through the HVACR unit. The airflow 32 may be driven by a blower 42, such as a fan, included in furnace 20. In the embodiment and position shown in FIG. 2, the refrigeration coil and drain pan assembly 22 is located in the horizontal-right position, with the airflow 32 moving left-to-right when viewed from a perspective facing the side of the refrigeration coil assembly where the refrigerant line 30 exits the assembly. When rotated 180 degrees in rotation direction 44 about an axis 46 that is parallel to the direction of the airflow 32, the refrigeration coil and drain pan assembly 22 may be in a horizontal-left position, with the airflow 32 traveling towards the left of the refrigeration coil and drain pan assembly 22 when viewed from the side having the refrigerant line connection 30. In both of these positions, one of the drain pans 24 is at the bottom of the refrigeration coil and drain pan assembly 22, able to receive condensation. Also, in both positions, the fins 28 of the refrigeration coil 34 are running between the drain pans 24. The fins 28 may run in a direction perpendicular to the planes of each drain pan 24, for example vertically between the drain pans 24 when the refrigeration coil and drain pan assembly 22 is installed alongside a furnace 20. In the embodiment shown in FIG. 2, the refrigeration coil 34 is in a dedicated horizontal arrangement.
FIG. 3 shows a drain pan. The drain pan 50 has one or more drain connections 52. The drain pan may include first level 54, second level 58, and third level 62. The drain pan also has side wall 68. Side wall 68 retains condensate which forms or drips into the drain pan, for example condensate in the first level 54 of the drain pan. Each of first level 54, second level 58, and/or third level 62 may be curved or sloped, for example level 54 may be sloped such that condensate is directed towards the drain connections 52. In an embodiment, a level is flat, for example level 58 forming a flat surface in the shape of a footprint of a refrigeration coil, such that the refrigeration coil may rest on that level. Other features may be disposed on a particular level, for example mounting features 64 a may be located on third level 62 and a mounting feature 64 b may be located on second level 58. In the embodiment shown in FIG. 3, mounting features 64 a are channels where a feature of a refrigeration coil may be snapped in to connect the refrigeration coil to the drain pan 50. In an embodiment, mounting feature 64 b is a pair of tabs to be received by slots on the refrigeration coil. First level 54 may be joined to second level 58 by a surface 56. Mounting features may be, for example, flanges or other projections which may interface with features on the refrigeration coil, screw-holes or other features receiving a fastener, and/or other mechanical interfaces through which the drain pan 50 may be connected to the refrigeration coil. Second level 58 may be joined to third level 62 by a surface 60. In an embodiment, the relative height of levels 58 and 62 may be such that level 62 is flush with the refrigeration coil when the refrigeration coil and drain pan are installed together, to direct airflow through the refrigeration coil. Surfaces 56 and/or 60 may be vertical or may be sloped. The drain pan may include other features such as ridges 66. Drain pan features which may be included in embodiments are also described in U.S. Patent Application No. 62/440,095, which is herein incorporated by reference in its entirety.
FIG. 4A shows a top-down view of a refrigeration coil and drain pan assembly. In the embodiment shown in FIG. 4, airflow 102 enters the assembly and blows through refrigeration coil 104. Refrigeration coil 104 is in a dedicated-horizontal orientation. Condensate from refrigeration coil 104 collects in drain pan 108 beneath the coil, and is removed from drain pan 108 via drain connections 106. Refrigerant line 100 allows the transfer of a working fluid to the refrigeration coil. In the embodiment shown in FIG. 4A, the refrigerant line 100 is disposed such that when installed, the embodiment shown in FIG. 4A will be in the horizontal-right orientation.
FIG. 4B shows a top-down view of the refrigeration coil and drain pan assembly according to FIG. 4A when the assembly has been rotated 180 degrees in a rotation direction 112 about an axis 110 parallel to the direction of airflow 102 when it enters the refrigeration coil and drain pan assembly. Following this rotation, the refrigeration coil 104 remains in the same dedicated-horizontal orientation, with the airflow 102 entering at the open end of the V-shape and traveling towards the restricted end of the V-shape of the refrigeration coil 104. Drain connections 106 are present in drain pan 108 which is beneath the refrigeration coil 104 and receives condensate from the refrigeration coil 104. The rotation of the assembly results in refrigerant line 100 exiting the assembly on the opposite side from the side it exits in the orientation shown in FIG. 4A. In FIG. 4B, the refrigerant line 100 is positioned such that the assembly is in the horizontal-left orientation, whereas the assembly is positioned such that it is in the horizontal-right orientation in FIG. 4A.
Aspects:
It is to be appreciated that any of aspects 1-10 may be combined with any of aspects 11-19.
Aspect 1: A refrigeration coil and drain pan assembly, comprising:

- a first drain pan having one or more drain connections,
- a second drain pan having one or more drain connections, and
- a refrigeration coil comprising a plurality of fins;
- wherein the first drain pan and second drain pan are opposite one another with respect to the refrigeration coil, and the fins of the refrigeration coil are oriented in a direction between the first drain pan and the second drain pan.

Aspect 2: The refrigeration coil and drain pan assembly according to aspect 1, further comprising a refrigerant line connected to the refrigeration coil.
Aspect 3: The refrigeration coil and drain pan assembly according to aspect 2, wherein the refrigerant line exits the refrigeration coil and drain pan assembly at a point equidistant from the first drain pan and the second drain pan.
Aspect 4: The refrigeration coil and drain pan assembly according to any of aspects 2-3, further comprising a removable access door disposed on a side of the refrigeration coil and drain pan assembly where the refrigerant line exits the refrigeration coil and drain pan assembly.
Aspect 5: The refrigeration coil and drain pan assembly according to any of aspects 1-4, wherein the first drain pan and the second drain pan are parallel to one another.
Aspect 6: The refrigeration coil and drain pan assembly according to aspect 5, wherein the fins run in a direction perpendicular to the planes of both the first drain pan and the second drain pan.
Aspect 7: The refrigeration coil and drain pan assembly according to any of aspects 1-6, wherein at least one of the first drain pan and the second drain pan comprises at least two levels.
Aspect 8: The refrigeration coil and drain pan assembly according to any of aspects 1-7, wherein the refrigeration coil is a dedicated horizontal refrigeration coil.
Aspect 9: The refrigeration coil and drain pan assembly according to any of aspects 1-8, wherein the refrigeration coil is configured for an airflow to enter the refrigeration coil from a specific direction.
Aspect 10: The refrigeration coil and drain pan assembly according to any of aspects 1-9, wherein the refrigeration coil has an open end and a converged end and an airflow enters the refrigeration coil at the open end and travels in a direction towards the converged end.
Aspect 11: An HVACR unit, comprising:

- a blower driving an airflow, and
- a refrigeration coil and drain pan assembly, located downstream of the blower with respect to the airflow, wherein the refrigeration coil and drain pan assembly comprises:
  - a first drain pan having one or more drain connections,
- a second drain pan having one or more drain connections, and
- a refrigeration coil comprising a plurality of fins, the fins oriented in a direction between the first drain pan and the second drain pan, and
- a refrigerant line, exiting the refrigeration coil and drain pan assembly on a side;
- wherein the first drain pan is located opposite the second drain pan with respect to the refrigeration coil.

Aspect 12: The HVACR unit according to aspect 11, wherein the refrigeration coil and drain pan assembly is oriented such that one of the first drain pan and the second drain pan is located at the bottom of the refrigeration coil and drain pan assembly.
Aspect 13: The HVACR unit according to any of aspects 11-12, wherein the refrigeration coil has an open end and a converged end and the airflow enters the refrigeration coil at the open end and travels in a direction towards the converged end.
Aspect 14: The HVACR unit according to aspect 13, The HVACR unit of claim 13, wherein the refrigeration coil and drain pan assembly is installed in one of:

- a first position where airflow through the refrigeration coil and drain pan assembly is from left to right from the perspective of the side of the refrigeration coil and drain pan assembly where the refrigerant line leaves the refrigeration coil and drain pan assembly, or
- a second position where airflow through the refrigeration coil and drain pan assembly is from right to left from the perspective of the side of the refrigeration coil and drain pan assembly where the refrigerant line leaves the refrigeration coil and drain pan assembly, and
- wherein the refrigeration coil and drain pan assembly may be switched from the first position to the second position.

Aspect 15: The HVACR unit according to any of aspects 11-14, wherein the refrigeration coil and drain pan assembly further comprises a removable access door disposed on a side of the refrigeration coil and drain pan assembly where the refrigerant line exits the refrigeration coil and drain pan assembly.
Aspect 16: The HVACR unit according to any of aspects 11-15, wherein at least one of the first drain pan and the second drain pan comprises at least two levels.
Aspect 17: The HVACR unit according to any of aspects 11-16, wherein the refrigerant line exits the refrigeration coil and drain pan assembly at a point equidistant from the first drain pan and the second drain pan.
Aspect 18: The HVACR unit according to any of aspects 11-17, wherein the first drain pan and the second drain pan are parallel to one another.
Aspect 19: The HVACR unit according to aspect 18, wherein the fins run in a direction perpendicular to the planes of both the first drain pan and the second drain pan.
The examples disclosed in this application are to be considered in all respects as illustrative and not limitative. The scope of the invention is indicated by the appended claims rather than by the foregoing description; and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Claims

1. A refrigeration coil and drain pan assembly, comprising:

a first drain pan having one or more drain connections,

a second drain pan having one or more drain connections, and

a refrigeration coil comprising a plurality of fins;

wherein the first drain pan and second drain pan are opposite one another with respect to the refrigeration coil, and the fins of the refrigeration coil are oriented in a direction between the first drain pan and the second drain pan.

2. The refrigeration coil and drain pan assembly of claim 1, further comprising a refrigerant line connected to the refrigeration coil

3. The refrigeration coil and drain pan assembly of claim 2, wherein the refrigerant line exits the refrigeration coil and drain pan assembly at a point equidistant from the first drain pan and the second drain pan.

4. The refrigeration coil and drain pan assembly of claim 2, further comprising a removable access door disposed on a side of the refrigeration coil and drain pan assembly where the refrigerant line exits the refrigeration coil and drain pan assembly.

5. The refrigeration coil and drain pan assembly of claim 1, wherein the first drain pan and the second drain pan are parallel to one another.

6. The refrigeration coil and drain pan assembly of claim 5, wherein the fins run in a direction perpendicular to the planes of both the first drain pan and the second drain pan.

7. The refrigeration coil and drain pan assembly of claim 1, wherein at least one of the first drain pan and the second drain pan comprises at least two levels.

8. The refrigeration coil and drain pan assembly of claim 1, wherein the refrigeration coil is a dedicated horizontal refrigeration coil.

9. The refrigeration coil and drain pan assembly of claim 1, wherein the refrigeration coil is configured for an airflow to enter the refrigeration coil from a specific direction.

10. The refrigeration coil and drain pan assembly of claim 1, wherein the refrigeration coil has an open end and a converged end and an airflow enters the refrigeration coil at the open end and travels in a direction towards the converged end.

11. An HVACR unit, comprising:

a blower driving an airflow, and

a refrigeration coil and drain pan assembly, located downstream of the blower with respect to the airflow, wherein the refrigeration coil and drain pan assembly comprises:

a first drain pan having one or more drain connections,

a second drain pan having one or more drain connections, and

a refrigeration coil comprising a plurality of fins, the fins oriented in a direction between the first drain pan and the second drain pan, and

a refrigerant line, exiting the refrigeration coil and drain pan assembly on a side;

wherein the first drain pan is located opposite the second drain pan with respect to the refrigeration coil.

12. The HVACR unit of claim 11, wherein the refrigeration coil and drain pan assembly is oriented such that one of the first drain pan and the second drain pan is located at the bottom of the refrigeration coil and drain pan assembly.

13. The HVACR unit of claim 11, wherein the refrigeration coil has an open end and a converged end and the airflow enters the refrigeration coil at the open end and travels in a direction towards the converged end.

14. The HVACR unit of claim 13, wherein the refrigeration coil and drain pan assembly is installed in one of:

a first position where airflow through the refrigeration coil and drain pan assembly is from left to right from the perspective of the side of the refrigeration coil and drain pan assembly where the refrigerant line leaves the refrigeration coil and drain pan assembly, or

a second position where airflow through the refrigeration coil and drain pan assembly is from right to left from the perspective of the side of the refrigeration coil and drain pan assembly where the refrigerant line leaves the refrigeration coil and drain pan assembly, and

wherein the refrigeration coil and drain pan assembly may be switched from the first position to the second position.

15. The HVACR unit of claim 11, wherein the refrigeration coil and drain pan assembly further comprises a removable access door disposed on a side of the refrigeration coil and drain pan assembly where the refrigerant line exits the refrigeration coil and drain pan assembly.

16. The HVACR unit of claim 11, wherein at least one of the first drain pan and the second drain pan comprises at least two levels.

17. The HVACR unit of claim 11, wherein the refrigerant line exits the refrigeration coil and drain pan assembly at a point equidistant from the first drain pan and the second drain pan.

18. The HVACR unit of claim 11, wherein the first drain pan and the second drain pan are parallel to one another.

19. The HVACR unit of claim 18, wherein the fins run in a direction perpendicular to the planes of both the first drain pan and the second drain pan.