A liquid dosing system is disclosed and can include an inlet conduit and an outlet conduit. The inlet and outlet conduits can each be configured to fluidly communicate a heat exchanger of a water heater. The liquid dosing system can include one or more connector conduits configured to fluidly connect the inlet conduit and the outlet conduit to define a fluid circuit by at least the inlet conduit, the heat exchanger, the outlet conduit, and the one or more connector conduits. The liquid dosing system can include a pump configured to pump water through the fluid circuit, a reservoir configured to store an additive, and a dosing device configured to dispense the additive into the fluid circuit.

The present disclosure provides a flushing device and method for an evaporator of dryer, and a dryer. The flushing device comprises an evaporator, a water storage box and a condensate water pan for collecting condensate water, wherein an eccentric bucket is arranged between the water storage box and the evaporator, a supporting structure is arranged at two symmetrical sides of a periphery of the eccentric bucket, the supporting structure enables the eccentric bucket to turn over along with a change in the center of gravity of the eccentric bucket, a pipeline for conveying condensate water to the eccentric bucket is arranged between the eccentric bucket and the condensate water pan, an opening of the eccentric bucket is arranged upwards, and after the eccentric bucket is turned over, the opening of the eccentric bucket is aligned with the evaporator, such that condensate water in the eccentric bucket flushes the evaporator.

The present disclosure provides a flushing device and method for an evaporator of dryer, and a dryer. The flushing device comprises an evaporator, a water storage box and a condensate water pan for collecting condensate water, wherein an eccentric bucket is arranged between the water storage box and the evaporator, a supporting structure is arranged at two symmetrical sides of a periphery of the eccentric bucket, the supporting structure enables the eccentric bucket to turn over along with a change in the center of gravity of the eccentric bucket, a pipeline for conveying condensate water to the eccentric bucket is arranged between the eccentric bucket and the condensate water pan, an opening of the eccentric bucket is arranged upwards, and after the eccentric bucket is turned over, the opening of the eccentric bucket is aligned with the evaporator, such that condensate water in the eccentric bucket flushes the evaporator.

A heatsink comprising a heat exchange device having a plurality of heat exchange elements each having a surface boundary with respect to a heat transfer fluid, having successive elements or regions having varying size scales. According to one embodiment, an accumulation of dust or particles on a surface of the heatsink is reduced by a removal mechanism. The mechanism can be thermal pyrolysis, vibration, blowing, etc. In the case of vibration, adverse effects on the system to be cooled may be minimized by an active or passive vibration suppression system.

A heatsink comprising a heat exchange device having a plurality of heat exchange elements each having a surface boundary with respect to a heat transfer fluid, having successive elements or regions having varying size scales. According to one embodiment, an accumulation of dust or particles on a surface of the heatsink is reduced by a removal mechanism. The mechanism can be thermal pyrolysis, vibration, blowing, etc. In the case of vibration, adverse effects on the system to be cooled may be minimized by an active or passive vibration suppression system.

An apparatus for cleaning heat exchangers may include a cleaning lance for cleaning a plurality of bores of the heat exchanger and an examination lance for examining a plurality of bores of the heat exchanger. The apparatus may further include a first feeder configured to extend and retract the cleaning lance and a second feeder configured to extend and retract the examination lance. The apparatus may further include a controller configured to control the first feeder to feed the cleaning lance into a first bore, to control the cleaning lance to clean the first bore, and to control the first feeder to retract the cleaning lance from the first bore.

An apparatus for cleaning heat exchangers may include a cleaning lance for cleaning a plurality of bores of the heat exchanger and an examination lance for examining a plurality of bores of the heat exchanger. The apparatus may further include a first feeder configured to extend and retract the cleaning lance and a second feeder configured to extend and retract the examination lance. The apparatus may further include a controller configured to control the first feeder to feed the cleaning lance into a first bore, to control the cleaning lance to clean the first bore, and to control the first feeder to retract the cleaning lance from the first bore.

Apparatus and system for self-cleaning a heat transfer coil of an HVAC system includes a foam or spray generator, one or more manifolds, one or more couplers, and a controller. The foam or spray generator is configured to generate foam or spray. Each manifold includes one or more emitters. The couplers are configured to couple the manifolds onto the heat transfer coil of the HVAC system, such that the emitters are configured to emit the foam or spray onto a side of the heat transfer coil. The controller is configured to cause the foam or spray generator to generate the foam or spray and cause the emitters to emit the foam or spray when a fan is running, such that the foam or spray is caused to flow through the heat transfer coil to clean debris off or apply a treatment to the heat transfer coil.

Apparatus and system for self-cleaning a heat transfer coil of an HVAC system includes a foam or spray generator, one or more manifolds, one or more couplers, and a controller. The foam or spray generator is configured to generate foam or spray. Each manifold includes one or more emitters. The couplers are configured to couple the manifolds onto the heat transfer coil of the HVAC system, such that the emitters are configured to emit the foam or spray onto a side of the heat transfer coil. The controller is configured to cause the foam or spray generator to generate the foam or spray and cause the emitters to emit the foam or spray when a fan is running, such that the foam or spray is caused to flow through the heat transfer coil to clean debris off or apply a treatment to the heat transfer coil.

A method cleans surfaces in an internal volume of an aircraft component through which a medium flows. The method includes: connecting the internal volume to be cleaned to a steam generator; generating a cleaning steam having a predetermined vapour pressure and temperature by the steam generator; applying the cleaning steam to the surfaces to be cleaned in the internal volume; maintaining the vapour pressure and the temperature within the internal volume for the duration of a predetermined condensation time; generating a pressure drop in the internal volume of the aircraft component, in order to vaporise the portion of the cleaning steam that condensed during the condensation time; and removing the cleaning steam from the internal volume via a discharge device.