A method of cleaning an HVAC coil unit located above a drain basin. One step of the method involves providing a supply and collection assembly having a reservoir containing liquid cleaning solution, a pump operative to output the liquid cleaning solution through a supply outlet, and a vacuum source operative to draw in used liquid cleaning solution through a collection inlet. According to another step, a nozzle device in fluid communication with the supply outlet is also provided, the nozzle device having a delivery face. A further step involves providing a fluid return tool in fluid communication with the collection inlet, and positioning the fluid return tool in the drain basin. According to a further step, the delivery face of the nozzle device is moved across a surface of the HVAC coil unit to deliver the cleaning solution into areas between fins thereof.

Disclosed are devices and systems for self-cleaning deep HVAC coils with built-in self-cleaning mechanisms and enhanced heat transfer, and methods of cleaning thereof. For example, some embodiments of a deep HVAC coil include a series of built-in self-cleaning mechanisms disposed among an array of heat transfer coils. Depending on the size and depth of the deep HVAC coil, the number of self-cleaning mechanisms may vary. The disposition and installation of self-cleaning mechanisms in the deep coil HVAC is configured to provide an even distribution and injection of a desired cleaning solution or foam which sufficiently covers an internal surface area of the deep HVAC coils and sufficiently fills an internal volume of the deep HVAC coils.

A heat exchanger cleaner apparatus for spraying a cleaning composition into an air handler of an air conditioning system to contact an outer surface of a heat exchanger of the air handler includes a spray outlet assembly, a pump device, a connector interface, and a controller. The spray outlet assembly is inserted into an interior of the air handler to be exposed to the heat exchanger outer surface. The connector interface detachably couples with a complementary connector interface of a cartridge having a cartridge reservoir holding the cleaning composition, to establish flow communication between the cartridge reservoir and the pump device. The controller operates the pump device to pump cleaning composition from the cartridge reservoir and through the spray outlet assembly such that the spray outlet assembly sprays a fluid stream of the cleaning composition at least partially contacting the outer surface of the heat exchanger, without manual intervention.

Air flow apparatus has at least one array of air channels, an air duct covering the array of air channels and being connected to the air channels, a fan arranged at the air duct for generating an air flow through the array of air channels, a cleaning device for the array of air channels arranged inside the air duct, the cleaning device including: a nozzle bar extending in front of the array of air channels and a nozzle manifold including a plurality of nozzles arranged along the nozzle bar and directed towards the array of air channels, wherein the nozzle bar is mounted to the air flow apparatus to be movable across at least a section of the array of air channels.

Retaining bracket for a fluid spray delivery apparatus to ensure that an applicator rod remains properly attached to the apparatus and in fluid communication with the fluid even when subjected to a driving force. Also disclosed is a fluid application system or assembly, and a method of applying fluid using the same, the system or assembly including a source of fluid to be applied to a target object, a siphon gun assembly, an applicator rod, tubing for placing the applicator rod in fluid communication with the siphon gun assembly, and a retaining bracket that secures the tubing to the siphon gun assembly such that the tubing remains in place and does not disconnect from the siphon gun assembly when subjected to a driving force such as water under pressure.

A system capable of autonomous operation is disclosed for cleaning a tube bundle of a heat exchanger core. The system comprises a lance for directing a jet of fluid into spaces between the tubes of the bundle, a carriage for advancing the lance into the bundle, a mount movable relative to the carriage for holding the lance, and a sensor for detecting relative movement between the lance and the carriage, so as to detect when a reaction force acting on the lance upon encountering an obstruction in the tube bundle exceeds a predetermined limit.

The invention relates to a tubular boiler with a heat exchange tube with at least one helical layer situated in a heat exchange chamber, and which includes a set of laterally joined spirals. The boiler includes, an inner side of the helical layer, an oven that is rigidly joined to said layer and connected to a feeder by means of which fuel is supplied. The boiler also includes an output collector for collecting ash and slag, which connects the inside of the heat exchange chamber to the outside of the boiler, and a forced-air-current generator that generates a movement of air inside the boiler and directs it to the oven. This movement of air moves the ash and slag along the at least one helical layer to the output collector.

A frame-mounted mobile cleaning system permanently positionable above or below the tube bundles of an air-cooled heat exchanger (ACHE) and in fluid communication with an external source of pressurized cleaning fluid includes a mobile transverse spray head assembly formed from a plurality of separate interchangeable fluid compartments, each fluid compartment having an inlet for receiving the pressurized cleaning fluid and a fluid discharge wall having at least one nozzle aligned with the longitudinal axes of the finned heat exchange tubes below or above, or elongated slot nozzles that are transverse to the axes of the finned tubes and that are configured to discharge a predetermined pattern of pressurized cleaning fluid onto and between the surfaces of the fins of the heat exchange tubes as the assembly is moved from one end of the ACHE tube bundles to the other.

Systems and methods for cleaning a heat recovery steam generator system including tubes and fins associated therewith using deep cleaning alignment equipment are described. The deep cleaning alignment equipment primarily includes at least one wedge and at least one wand. The wedge may be an elongate wedge configured to maximize the surface area that contacts the tubes and fins, which in turn minimizes the amount of stress about any specific point of the tubes or the fins. Additionally, the wedge may be made of a variety of different materials. The wedge may include multiple pieces that can be releasably secured together. The wedge may also have at least one opening formed therein to assist in removal of the wedge from the system.

A display apparatus is provided. The display apparatus comprises an electronic display assembly, a heat exchanger, a fan, and a cleaning device. The heat exchanger comprises one or more internal heat dissipation pathways and one or more external heat dissipation pathways. The one or more internal heat dissipation pathways are thermally coupled to the electronic display assembly and the one or more internal heat dissipation pathways are thermally coupled to the one or more external heat dissipation pathways. The fan generates ambient air flow passing through the one or more external heat dissipation pathways. The cleaning device is connected to the one or more external heat dissipation pathways, and used for injecting a cleaning fluid into the one or more external heat dissipation pathways.