Abstract: Methods, systems and apparatuses are directed to a capacity modulating assembly configured to distribute two-phase refrigerant mixture to an evaporator of a HVAC system, such as a micro-channel heat exchanger (MCHEX) evaporator. The capacity modulating assembly may include a plurality of expansion devices. During capacity modulation, at least one of the plurality of expansion devices can be closed so that a refrigerant flow rate through the remaining expansion devices can be maintained. The capacity modulating assembly can include a refrigerant outflow port, which may help direct refrigerant out of the heat exchanger. The capacity modulating assembly can be connected with the MCHEX. The plurality of expansion devices can be configured to extend inside a header of the MCHEX to help distribute refrigerant to the micro-channel tubes of the MCHEX.

Abstract: Apparatuses, systems and methods implementing a multi-coil heat exchanger are directed to providing good heat transfer performance, capacity, and efficiency, and while reducing pressure drop through multi-coil microchannel evaporators. The multi-coil heat exchanger in some examples is a multi-coil microchannel evaporator. The multi-coil microchannel evaporator can be implemented in a refrigerant system that is a single circuit, where the multi-coil microchannel evaporator is an air to refrigerant type heat exchanger. The multi-coil microchannel evaporator includes a distribution to the multiple coils of the multi-coil microchannel evaporator, where the distribution includes one or more separations to transmit refrigerant to each of the coils of the multi-coil microchannel evaporator and one or more junctions to transmit refrigerant from the coils.

Abstract: Methods, systems and apparatuses are directed to a capacity modulating assembly configured to distribute two-phase refrigerant mixture to an evaporator of a HVAC system, such as a micro-channel heat exchanger (MCHEX) evaporator. The capacity modulating assembly may include a plurality of expansion devices. During capacity modulation, at least one of the plurality of expansion devices can be closed so that a refrigerant flow rate through the remaining expansion devices can be maintained. The capacity modulating assembly can include a refrigerant outflow port, which may help direct refrigerant out of the heat exchanger. The capacity modulating assembly can be connected with the MCHEX. The plurality of expansion devices can be configured to extend inside a header of the MCHEX to help distribute refrigerant to the micro-channel tubes of the MCHEX.

Abstract: Methods, systems and apparatuses are directed to a capacity modulating assembly configured to distribute two-phase refrigerant mixture to an evaporator of a HVAC system, such as a micro-channel heat exchanger (MCHEX) evaporator. The capacity modulating assembly may include a plurality of expansion devices. During capacity modulation, at least one of the plurality of expansion devices can be closed so that a refrigerant flow rate through the remaining expansion devices can be maintained. The capacity modulating assembly can include a refrigerant outflow port, which may help direct refrigerant out of the heat exchanger. The capacity modulating assembly can be connected with the MCHEX. The plurality of expansion devices can be configured to extend inside a header of the MCHEX to help distribute refrigerant to the micro-channel tubes of the MCHEX.

Abstract: Apparatuses, systems and methods implementing a multi-coil heat exchanger are directed to providing good heat transfer performance, capacity, and efficiency, and while reducing pressure drop through multi-coil microchannel evaporators. The multi-coil heat exchanger in some examples is a multi-coil microchannel evaporator. The multi-coil microchannel evaporator can be implemented in a refrigerant system that is a single circuit, where the multi-coil microchannel evaporator is an air to refrigerant type heat exchanger. The multi-coil microchannel evaporator includes a distribution to the multiple coils of the multi-coil microchannel evaporator, where the distribution includes one or more separations to transmit refrigerant to each of the coils of the multi-coil microchannel evaporator and one or more junctions to transmit refrigerant from the coils.

Abstract: A condensate drain device includes an elongate base having a first end, a second end and side edges extending between the first and second ends; a plurality of teeth extending away from a side edge of the base; and a lip formed on the side edge of the base opposite from the teeth. Each tooth includes a free end and two side edges. The condensate drain device is configured to be attached to a microchannel coil to collect condensate including a plurality of tubes and a plurality of fins coupled to the tubes, with each tooth being received in a space formed between two adjacent fins.

Abstract: Methods, systems and apparatuses are directed to a capacity modulating assembly configured to distribute two-phase refrigerant mixture to an evaporator of a HVAC system, such as a micro-channel heat exchanger (MCHEX) evaporator. The capacity modulating assembly may include a plurality of expansion devices. During capacity modulation, at least one of the plurality of expansion devices can be closed so that a refrigerant flow rate through the remaining expansion devices can be maintained. The capacity modulating assembly can include a refrigerant outflow port, which may help direct refrigerant out of the heat exchanger. The capacity modulating assembly can be connected with the MCHEX. The plurality of expansion devices can be configured to extend inside a header of the MCHEX to help distribute refrigerant to the micro-channel tubes of the MCHEX.