Abstract: An apparatus includes a drain pan configured to receive liquid condensate from a horizontal evaporator coil above the drain pan and a drain pan extension coupled to the drain pan. A pin on the front and rear sides of the drain pan extension is fitted and movable within a corresponding notch in the front and rear sides of the drain pan. The drain pan extension is securably configurable in a first configuration and a second configuration. In the first configuration, the drain pan extension extends above the drain pan at a first angle relative to the drain pan. In the second configuration, at least a portion of the drain pan extension extends beyond the left pan side of the drain pan at a second angle, which may be selected for improved capture of liquid condensate from the horizontal evaporator coil.

Abstract: An apparatus includes a drain pan configured to receive liquid condensate from a horizontal evaporator coil above the drain pan and a drain pan extension coupled to the drain pan. A pin on the front and rear sides of the drain pan extension is fitted and movable within a corresponding notch in the front and rear sides of the drain pan. The drain pan extension is securably configurable in a first configuration and a second configuration. In the first configuration, the drain pan extension extends above the drain pan at a first angle relative to the drain pan. In the second configuration, at least a portion of the drain pan extension extends beyond the left pan side of the drain pan at a angle, which may be selected for improved capture of liquid condensate from the horizontal evaporator coil.

Abstract: A method and system are described for a refrigerant distributor, and for attaching the distributor tubes to an evaporator coil. A short tube can inserted into the bell end of a tube and the hell end can be crimped around the short tube to lock it into place. The short tube preferably has a bead or widened shaft around which to crimp the bell. The disclosure is particularly beneficial for aluminum based components because aluminum is more susceptible to blockages or leaking due to problems from brazing.

Abstract: An apparatus includes a drain pan configured to receive liquid condensate from a horizontal evaporator coil above the drain pan and a drain pan extension coupled to the drain pan. A pin on the front and rear sides of the drain pan extension is fitted and movable within a corresponding notch in the front and rear sides of the drain pan. The drain pan extension is securably configurable in a first configuration and a second configuration. In the first configuration, the drain pan extension extends above the drain pan at a first predefined angle relative to the drain pan. In the second configuration, at least a portion of the drain pan extension extends beyond the left pan side of the drain pan at a predefined angle, which may be selected for improved capture of liquid condensate from the horizontal evaporator coil.

Abstract: A method and system are described for a refrigerant distributor, and for attaching the distributor tubes to an evaporator coil. A short tube can inserted into the bell end of a tube and the hell end can he crimped around the short tube to lock it into place. The short tube preferably has a bead or widened shaft around which to crimp the bell. The disclosure is particularly beneficial for aluminum based components because aluminum is more susceptible to blockages or leaking due to problems from brazing.

Abstract: A method and system are described for a refrigerant distributor, and for attaching the distributor tubes to an evaporator coil. A short tube can inserted into the bell end of a tube and the bell end can be crimped around the short tube to lock it into place. The short tube preferably has a bead or widened shaft around which to crimp the bell. The disclosure is particularly beneficial for aluminum based components because aluminum is more susceptible to blockages or leaking due to problems from brazing.

Abstract: In certain embodiments, a controller turns a heat pump system on in heating mode or cooling mode and determines a position for the heat pump system's reversing valve based on an O/B setting. The O/B setting indicates to configure the reversing valve in a first position that causes refrigerant to flow in a first direction when in heating mode and in a second position that causes the refrigerant to flow in a second, opposite direction when in cooling mode. The controller determines whether to maintain or reverse the O/B setting. If the heat pump system heats while in the heating mode or cools while in the cooling mode, the O/B setting is maintained. If the heat pump system cools while in the heating mode or heats while in the cooling mode, the O/B setting is reversed.

Abstract: A method and system are described for a refrigerant distributor, and for attaching the distributor tubes to an evaporator coil. A short tube can inserted into the bell end of a tube and the bell end can be crimped around the short tube to lock it into place. The short tube preferably has a bead or widened shaft around which to crimp the bell. The disclosure is particularly beneficial for aluminum based components because aluminum is more susceptible to blockages or leaking due to problems from brazing.

Abstract: This disclosure presents a heat exchanger that comprises a header frame having end plates, a plurality of rows of finned hairpins, each extending through a cooling fin and each having ends extending through the end plates, and at least one finless hairpin having ends extending through the end plates. Additionally, a support sheet is coupled to the header frame and at least on finless hairpin extends through the support sheet and is supported thereby. A method of manufacturing the heat exchanger is also presented as well as a heat ventilation air conditioning system in which the heat exchanger may be employed.

Abstract: This disclosure presents a heat exchanger that comprises a header frame having end plates, a plurality of rows of finned hairpins, each extending through a cooling fin and each having ends extending through the end plates, and at least one finless hairpin having ends extending through the end plates. A method of manufacturing the heat exchanger is also presented as well as a heat ventilation air conditioning system in which the heat exchanger may be employed.

Abstract: An air handler system comprising a cabinet housing a blower unit and a heat exchange unit. The blower unit and the heat exchange unit are located in a substantially same lateral dimension in the cabinet. The blower unit and the heat exchange unit are separated by a distance that provides for a substantially uniform flow of air through a vertically-orientated plane of the heat exchange unit when the blower unit is in operation.

Abstract: One aspect of this disclosure provides a refrigerant charge compensator having an increased heat transfer surface. The housing has an internal volume and first and second ports for allowing a passage of refrigerant therethrough. The internal volume is partitioned into an indirect refrigerant passageway that extends through the housing and a refrigerant storage area. The refrigerant storage area has a storage access port and is in contact with the indirect refrigerant passageway. Also a heat pump system implementing the compensator is provided and a method of manufacturing the compensator is provided.

Abstract: A structural plate for an air handler system. The system comprises a single sheet having at least two of the following structural elements: a) an air baffle for a heat exchanger; b) a stabilizer bracket attachable to an air handler cabinet; c) an air handler control box bracket; or d) a filter holder.

Abstract: The present disclosure is directed to an elongated body member configured to be inserted into a heat ventilation air conditioning (HVAC) plenum, said elongated body member having a middle portion, an upper supporting ledge, and a stop tab integrally formed therewith, and wherein said elongated body member is a unitary piece of bent sheet metal. The present disclosure is also directed to employing the drain rail and drain pan within a plenum housing. A method of fabricating a plenum housing the drain rails is also provided.

Abstract: The present invention provides a retaining clip for securing an air conditioning evaporator coil to a drain pan. The retaining clip has a U-shaped body formed from a single piece of material, wherein parallel panels for the sides of the U. One side of the U is longer than the other. A tab is formed from the end of the side panel that constitutes the longer side of the U, wherein the tab points toward the center of the U and is approximately perpendicular to the sides of the U. The retaining clip is mounted over a side wall of the drain pan, with the tab securing the clip in place by fitting underneath a section of the drain pan wall that projects outward from the general plane of the wall.

Abstract: A low profile evaporator coil assembly and method for configuring the assembly in HVAC equipment. In one deployment, the assembly 40 is located between a heating furnace and a plenum. The assembly 40 includes multiple coil slabs 42 through which a refrigerant courses. The slabs 42 lie in a parallel relationship at an angle of inclination to the air entering a coil assembly 40. A baffle 46 is associated with each coil slab 42 to constrain air flow through the associated coil slab. A drain pan 52 is positioned beneath the slabs. The drain pan 52 has multiple troughs 54 for collecting condensate. At least some of the multiple troughs 54 have an air foil 56 that reduces air flow restriction.

Abstract: A low profile evaporator coil assembly and method for configuring the assembly in HVAC equipment. In one deployment, the assembly 40 is located between a heating furnace and a plenum. The assembly 40 includes multiple coil slabs 42 through which a refrigerant courses. The slabs 42 lie in a parallel relationship at an angle of inclination to the air entering a coil assembly 40. A baffle 46 is associated with each coil slab 42 to constrain air flow through the associated coil slab. A drain pan 52 is positioned beneath the slabs. The drain pan 52 has multiple troughs 54 for collecting condensate. At least some of the multiple troughs 54 have an air foil 56 that reduces air flow restriction.

Abstract: A drain pan for capturing condensate from a cooling coil in an air conditioning system is configured to facilitate condensate drainage from the pan and to inhibit accumulation of condensate therein. The pan includes troughs for collecting condensate and for channeling the condensate to the front part of the pan where the drain openings are located. A back trough has a central hump to enhance the flow of condensate from the back trough in both directions into opposed side troughs. The side troughs are sloped from back to front to conduct the condensate into a front trough to facilitate drainage from the pan. The lowermost portion of the front trough region is defined by a relatively narrow, non-flat area to reduce the amount of condensate residue in the pan.

Abstract: Air conditioning apparatus is provided in which an air blower and an electric heater assembly are located in a common housing with the heater assembly projecting into the housing from a wall thereof in transverse relationship to the blower. This configuration eliminates the need for a dedicated space for the electric heater downstream of the blower housing, which reduces the size of the apparatus. The wall of the housing includes an opening through which the heater assembly is insertable into the housing. The heater assembly includes a mounting plate to close off the wall opening and to removably mount the heater assembly with the housing. The heater assembly preferably further includes an open coil electric heater, with a major dimension of the heater being oriented generally parallel to the direction of air flow in the blower housing.