In one embodiment, an overflow sensor assembly of an HVAC unit includes a sensor mounting bracket that is configured to be coupled to a mounting surface of the HVAC unit such that sensor probes of the overflow sensor assembly are suspended within and extend into a condensate drain pan of the HVAC unit. The sensor probes are defined by a sensor element that is coupled to the sensor mounting bracket and a spring that is coupled to the sensor element. The sensor probes are configured to activate an overflow detection circuit when the sensor probes come in contact with condensate fluid collected in the condensate drain pan prior to the condensate fluid overflowing from the condensate drain pan.

Enhancements to an air handler of an air conditioning system. The enhancements can include a scent dispersion system, a heat exchanger rinse system, and/or an air handler condensation drain pipe flush system. The scent dispersion system employs a pressure differential established within the air handler to draw a scent mist from a scent reservoir. The scent is disbursed throughout the structure by the air conditioning ventilation system. The heat exchanger rinse system dispenses a rinse fluid onto the heat exchanger. A cleaning composition can be injected into the rinse fluid to aid in the cleaning process. The flush system automatically configures a check valve upstream of the flush injection point. A flush fluid flows through the drain pipe applying a pressure to dislodge a blockage therein. A chemical composition can be added into the flush fluid to assist in the dislodging process.

A system comprising a conditioning system with one or more cooling coils configured to allow air to pass through the cooling coils to reduce a temperature of the air as well as an extraction portion with a plurality of condensing plates configured to receive conditioned air and configured to cause a portion water vapor of the conditioned air to collect and form liquid water, and a reservoir configured to receive collected liquid water from the plurality of condensing plates.

The present disclosure is directed to implementation of an environmental control unit using rotomolded techniques to fabricate the structures of the unit instead of the standard conventional sheet metal, extruded, forged, and punched parts. Such implementations will provide a lighter weight and more durable mechanical configuration that will also simplify inspection, simplify assembly/disassembly, and reduce fabrication costs. Implementations incorporate rotationally-molded interlocking structures to contain and attach the critical items of the ECU's mechanical components including the compressor, and the indoor and outdoor coils, as well as the fan and blower motor assembly. In one implementation, the rotomolded structure is strengthened and insulated (thermally and acoustically) by filling the interior void of the rotationally molded structure with a closed-cell foam.

A condensate drain line cleaning system including a coil attachment assembly and a drain attachment assembly is disclosed herein. The coil attachment assembly includes a tubing body configured to be connected to the drain line that is attached to the evaporator coil of an existing air conditioning unit. The drain attachment assembly is configured to be connecting to the existing drain line located outside a user's home. A user then pours a cleaning solution into an opening in the coil attachment assembly. Afterwards, a user then actuates a shut off valve disposed on the drain attachment assembly. A user then pours hot water into the opening of the coil attachment assembly to activate the cleaner therein. After waiting a certain amount of time, the user may then re-open the shut of valve to drain all the waste present in the drain line.

An air-conditioning system is provided that may include a first air-processing apparatus, which includes a first outlet formed to be open toward a floor and a first inlet formed to be open in a direction inclined relative to a direction in which the first outlet is open and is configured to deliver heat-exchanged air to the first outlet, and a second air-processing apparatus, which includes a second outlet formed to be open in a direction parallel to the first outlet and a second inlet formed to be open in a direction parallel to the first inlet and is configured to deliver purified air to the second outlet. The first outlet and the second outlet extend in a lateral direction, and the first air-processing apparatus and the second air-processing apparatus are arranged in the lateral direction.

A system for automizing an injection of a chemical treatment into an effluent drain line may include a containment tank, an injection pump disposed within the containment tank, at least one level switch disposed on or inside the containment tank, a flow line disposed at least partially within the containment tank, at least one flow meter disposed along the flow line, and a microcontroller. The microcontroller is configured to: maintain an off-time cycle, transmit a signal to the injection pump to pump a volume of chemical treatment stored in the containment tank into the flow line after the off-time cycle ends, track the volume of chemical treatment passing through the flow line with the at least one flow meter to produce a flow rate, inject the volume of chemical treatment from the flow line into an effluent drain line, track a current volume of the containment tank with the at least one level, and restart the off-time cycle.

An indoor unit of an air-conditioning apparatus includes a heat-medium heat exchanger, an air vent valve, a drain pan, and a hose. The heat-medium heat exchanger is provided in a housing to cause heat exchange to be performed between a heat medium and indoor air. The air vent valve allows air to escape from a heat medium passage that allows the heat medium to flow in the heat-medium heat exchanger. The drain pan is provided below the heat-medium heat exchanger to receive condensation water generated at a surface of the heat-medium heat exchanger. The hose has flexibility, and is attached to the air vent valve, and provided to let out the air along with the heat medium from the heat medium passage to the inner space in the drain pan. The hose has a double-wall structure and an upper end portion of the hose is fixed to the air vent valve.

A ventilation apparatus including a housing having an inlet flow path to discharge outdoor air, to an indoor space through a first outlet, and an outlet flow path to discharge indoor air, to an outdoor space through a second outlet, a total enthalpy heat exchanger in which air flowing along the inlet flow path and air flowing along the outlet flow path exchange heat, and a heat exchanger to remove moisture in the air flowing along the inlet flow path. The housing including a connection flow path connecting the inlet flow path to the outlet flow path, and a connection path opening and closing unit configured to selectively open and close the connection flow path. The connection flow path to allow indoor air, to pass through the heat exchanger and flow to the first outlet while preventing the indoor air from flowing to the total enthalpy heat exchanger.

A condensate trap for providing improved gas seal to a heating, ventilation, air conditioning, and refrigeration (HVAC/R) system. The trap can include an interior reservoir containing a volume of fluid to create a gas seal between an inlet pathway and an output. The interior reservoir can be accessed through an access port, by removing a removable cover, for maintenance and inspection. The trap can include vents or vent precursors for aiding in drainage of excess fluid, as well as early detection of problem conditions. The trap can be made from modified parts put together in a specific manner, or through purpose-built parts. The trap can include liquid level sensors and inspection windows to aid in early detection of problem conditions.