Abstract: A system and method for reducing fouling. In one embodiment, the system includes a housing and a plurality of channels contained within the housing. The system also includes a fouling reduction element that passes through at least one channel of the plurality of channels, wherein the fouling reduction element is movable such that it reduces fouling inside of the at least one channel. According to the system and method disclosed herein, the fouling reduction element efficiently cleans the inside of the channels of the cooling system.

Abstract: A condensate collector box includes a furnace mounting plate having a first edge portion, a second edge portion that extends from the first edge portion, at least one vent drain channel that extends along one of the first and second edge portions, and a heat exchanger condensate collection area. The condensate collector box also includes an inducer fan mounting member having a first surface and opposing second surface arranged upon the furnace mounting plate to form a condensate collection zone.

Abstract: Use of an inert gas in a fluid-operated heat exchange system. A cooling loop of a heat exchange system is purged with an inert gas to remove oxygen from the cooling loop. Coolant is added to the cooling loop of the heat exchange system. The coolant flows in the cooling loop of the heat exchange system to mix the inert gas with the coolant to provide a solution having a reduced concentration of oxygen.

Abstract: A tool for cleaning heat exchangers may include a fluid flow control valve, a hollow elongated stem attached to the valve and a hollow fan head attached to the hollow stem. The fan head may have a fan-head axis oriented at an oblique angle relative to a stem axis of the stem.

Abstract: The invention relates to a device for reheating the water of the windscreen washers of a motor vehicle comprising, in the engine compartment thereof, a degassing box (1) forming part of the engine cooling system, and at least one tank (3) for pressurised washing water, said tank being associated with a circulation pump which pumps water therefrom and supplies said water to nozzles for spraying the same over the windscreens. The inventive device is characterised in that the tank (3) at least partially surrounds the degassing box (1), leaving a separation space of a determined thickness thereinbetween, and a double-walled hollow body (4) is integrated into said space, defining a closed thermal insulating volume.

Abstract: A method and a device for detecting an abnormality of a heat exchanger exchanging heat between a first fluid flow flowing in a conduit and a second fluid flow flowing along a flow path, said conduit and said flow path each having an inlet and an outlet, whereby the method comprises the steps of establishing at least one parameter representative of the temperature conditions of the heat exchanger, establishing a second fluid inlet temperature, establishing a parameter indicative of expected heat exchange between the heat exchanger and the second fluid, processing the heat exchanger temperature, the second fluid temperature and the parameter indicative of expected heat exchange for establishing an estimated second fluid outlet temperature, and employing the estimated second fluid outlet temperature for evaluating the heat exchange between the first and second fluids by comparing the estimated second fluid outlet temperature, or a parameter derived therefrom, with a reference value.

Abstract: A cooler block for an agricultural tractor comprising a cooler assembly mounted on a radiator and coupled to the radiator by upper and lower linkages. The cooler assembly can be moved between a first position in which the cooler assembly lies parallel to the radiator and a second position in which the cooler assembly is inclined relative to the radiator. The cooler assembly is pivotable about a pivot in the upper linkage that is itself movable relative to the radiator. The lower linkage allows the entire cooler assembly to rise and the pivot of the upper linkage to move away from the radiator as the cooler assembly is pivoted from the first to the second position. A detent is incorporated into one of the two linkages to retain the cooler assembly in the second position.

Abstract: A handheld lance for high pressure jetting of tubes of a heat exchanger core comprises a fluid conduit defining an internal plenum chamber having at least one nozzle for emitting a jet of fluid for cleaning the outer surfaces of the tubes of the core and a coupling for connecting the plenum chamber to a high pressure fluid supply line. The or each conduit has an outer diameter sufficiently small to fit between all the tubes of the core and at least one elongate stabilizer bar is mounted on the coupling and positioned to one side of the or each conduit with the axis of the bar lying in the same plane as the adjacent conduit. The bar is sufficiently thin to fit between the tubes of the heat exchanger core and is sufficiently rigid to prevent lateral displacement of the adjacent conduit.

Abstract: An indoor air conditioner able to carry out washing and cleaning automatically includes a housing having a separating plate bored with wind outlets and through holes. Two fans are respectively received in two fan-accommodating grooves of the housing; a motor is installed in a motor-accommodating groove, having two rotary shafts respectively connected with the fan and covered with a waterproof bushing. Two filter screens are respectively assembled in the fan-accommodating groove; a heat exchanger is received in a heat exchanger-accommodating groove. The housing has one sidewall bored with a water intake, a water exhaust port and an overflow port. An upper cover is provided with a wind intake and a wind outlet, having a wind intake guide plate installed with disinfecting lamps, and further bored with a filling port and an exhaust port for refrigerant, ice water or hot water, a detergent filling pipe and an external air duct.

Abstract: An apparatus for tandem cleaning of an emitter electrode and collector electrode in electrohydrodynamic fluid accelerator and precipitator devices via movement of a cleaning mechanism including respective cleaning surfaces positioned to frictionally engage the emitter electrode and collector electrode. The cleaning mechanism causes the respective cleaning surfaces to travel along a longitudinal extent of the emitter electrode and, in tandem, over a major dimension of the collector electrode to remove detrimental material from respective electrode surfaces. Alternatively, the electrodes can be transited in tandem in frictional engagement with a fixed cleaning mechanism in the same or opposite directions. A conditioning material is optionally deposited on an electrode to at least partially mitigate ozone, erosion, corrosion, oxidation, or dendrite formation on the electrodes. The conditioning material can include an ozone reducer.

Abstract: An apparatus for cleaning an emitter electrode in electrohydrodynamic fluid accelerator and precipitator devices via movement of a cleaning device including granular abrasives positioned to frictionally engage the emitter electrode. The cleaning device causes the granular abrasives to travel along a longitudinal extent of the emitter electrode to remove detrimental material accumulated on the electrode. The granular abrasives can be retained in housing, on opposed cleaning surfaces, and can be compressed by the housing or an applied force to abrade detrimental material from the electrode surface.

Abstract: Disclosed are methods and apparatus for cleaning heat exchangers and similar vessels by introducing chemical cleaning solutions and/or solvents while maintaining a target temperature range by direct steam injection into the cleaning solution. The steam may be injected directly into the heat exchanger or into a temporary side stream loop for recirculating the cleaning solution or admixed with fluids being injected to the heat exchanger. The disclosed methods are suitable for removing metallic oxides from a heat exchanger under chemically reducing conditions or metallic species such as copper under chemically oxidizing conditions. In order to further enhance the heat transfer efficiency of heating cleaning solvents by direct steam injection, mixing on the secondary side of the heat exchanger can be enhanced by gas sparging or by transferring liquid between heat exchangers when more than one heat exchanger is being cleaned at the same time.

Abstract: A method and device for removing scaling from the interior of a conduit used in a heat transfer device, the method comprising the steps of diverting a portion of the fluid from the conduit, passing the diverted portion through a filter, passing the filtered portion through a magnetic field, and reintroducing the fluid into the conduit. The method of the present invention can also be used with chillers to control bacterial growth therein.

Abstract: A method for operating an internal combustion engine Exhaust Gas Recirculation (EGR) system that includes producing an EGR valve position signal to decrease the amount of exhaust gas passed to the EGR cooler when a processor determines the EGR cooler efficiency is less than the predetermined level and producing an EGR coolant valve position signal to decrease the amount of coolant passed to the EGR cooler when such processor determines the EGR cooler efficiency is less than the predetermined level. The processor produced EGR valve and the EGR coolant valve position signals result in regeneration within the cooler, returning the effectiveness of the cooler to a near “clean” condition.

Abstract: A reactor cools humidifies gases produced by combustion or the like. The reactor has a chamber with an inlet at a lower end to receive a flow of gas, and an outlet at a upper end. The gas flows in a generally upward direction through the reactor. The horizontal cross-section of the chamber increases with height and the flow velocity of the gas decreases as it flows upwardly. The reactor includes at least one device for injecting water droplets into the upper region of the chamber, counter to the gas flow. As the water droplets fall, they gradually evaporate and lose mass and encounter a counterflow of increasingly higher velocity and temperature until the force of the upwardly flowing gas is sufficient to reverse their flow and carry them in an upward direction.

Abstract: A device for extracting heat from gas, particularly combustion gas, containing dust and/or condensable substances, for recovering condensates, and including at least one heat exchanger including a shell having a symmetry of revolution surrounded by a cooling jacket. The device includes an opening for passage of a surfactant for treating the internal surface of the shell, the shell including at least one mechanism creating a substantially helicoid rotating gas stream in at least part of the shell.

Abstract: A system may include an apparatus for defrosting and/or clearing debris from a refrigeration component using pressurized dry air. The apparatus may include an air compressor that generates pressurized air. The air may be filtered (before or after compressing) to remove moisture and/or other contaminants to thereby generate pressurized dry air. The apparatus may include a reservoir, coupled to the air compressor, for storing the pressurized dry air. The reservoir may be coupled to one or more air distribution manifolds coupled to the reservoir. Each of the one or more air distribution manifolds may be coupled to an air discharge component such as an air pipe or tube. The air discharge component may receive the pressurized air from the air exhaust and may discharge the pressurized air through a plurality of orifices to the refrigeration component thereby defrosting and/or clearing debris from the refrigeration component.

Abstract: An exiting cleaning projectile verification system for a tube cleaning system includes a tube cleaning system having a control system for controlling the cleaning system, a projectile launcher, a projectile, a tube, and a containment system, the cleaning projectile being launched through the tube and cleaning the interior of the tube, the projectile exiting the tube and entering the containment system and a sensor that detects the projectile exiting the tube. The sensor is in communication with the containment system. The sensor may include an electric eye that detects the presence of the projectile entering the containment system. The sensor may also include a feedback line connected to the control system that automatically shuts off the control system when a problem is detected. The sensor may also emit an audible signal. One or more counters count the number of projectiles launched and the number entering the containment system. A difference in the count is an indication of a problem.

Abstract: A front end water box with an on-line rubber ball cleaning function in a tubular condenser of a water cooled chiller is provided. A front end water box and an automatic on-line rubber ball cleaning device are integrated. Besides the structure of a normal front end water box, a ball receiving device, a rubber ball collection cavity, a ball sending device, a division drainage device, a ball sending division separator, a ball observer, an automatic rubber ball receiving-and-sending control valve, an automatic terminal temperature difference (TTD) monitoring and recording device, and an automatic rubber ball cleaning controller are further included. Therefore, division cleaning, on-line observation, and rubber ball replacement are automatically realized, the operation TTD of the chiller is automatically displayed and recorded, and a function of manually adjusting the cleaning frequency, period, and start and stop is achieved, so as to ensure that the TTD increase of the chiller does not exceed 0.3° C.

Abstract: The present invention relates to a condenser tubes cleaning system for alleviating the common disadvantage of the prior arts includes a flow diverter, a first branch pipe, a second branch pipe, a three-way valve, a first one-way valve, a bypass pipe, a ball barrel, a liquid supply pipe, a cleaning ball supply pipe, a cleaning ball return pipe, a liquid return pipe, a second one-way valve, a normally open two-way valve, and a ball trap. Thus, the flow diverter is provided with the three-way valve, and the ball trap is provided with the normally open two-way valve, so that the flow diverter and the ball trap have a bypass function that the prior arts do not have, to maintain the constant flow rate in the main supply pipe and the main return pipe without increasing the electrical power load of the main circulating pump.

Abstract: The present invention provides a device for cleaning tubes, in particular the internal surfaces of tubes in heat exchange systems. The device comprises a mass (2) with an optionally provided central through-hole (10) disposed thereon, and optionally provided a plurality of protrusions (20, 21) mounted and/or moulded on the mass (2). The through-hole (10) is preferably of a conical shape-like configuration. A plurality of first protrusions (20) is disposed in a fin-like arrangement on the mass (2). A plurality of second protrusions (21) is disposed in a spiral arrangement on the mass (2), and the lengths of the second protrusions (21) are relatively longer than the length of the first protrusions (20). The mass may consist of an asymmetrically positioned weighted core (15) of different weights and sizes to provide a variety of relative density to the device and to serve as a geometrical manipulation to impart rotational momentum and random dynamic motion to the device.

Abstract: A device for cleaning contamination in heat exchangers, waste-heat boilers, or combustion chambers is provided. In some embodiments, the device comprises a tube, a blasting body, and a combustible gas mixture within the tube. In some embodiments, the tube is destroyed after blasting. In some embodiments, the device further comprises a second tube comprising a blasting cord that is connected to a fuse, wherein the second tube is coupled to the first tube by a hinge.

Abstract: This disclosure may relate generally to systems, devices, and methods for a injecting a solid compound in line with a pressurized fluid, typically through a sootblower, to be delivered to targeted areas on the inside of a utility furnace.

Abstract: Methods and apparatuses for cleaning heat exchangers and heat exchanger components utilizing thickness mode ultrasonics. Heat exchanger components are placed in a tank. The tank is filled with cleaning media. One or more thickness mode transducers are placed in the tank and the thickness mode transducers are operated to clean the tank. In further embodiments, one or more thickness mode transducers are integrated within a heat exchanger. The transducers are operated to clean the heat exchanger space and components located therein.

Abstract: A drying appliance having a drying chamber and a process air guide for guiding drying air through the drying chamber. The process air guide has a heat exchanger for cooling process air which includes a charge of humidity and particulates, and which is disposed downstream of the drying chamber within the process air guide. The heat exchanger is coated at least partially with a polymer coating on a part of a surface of the heat exchanger. The part of the surface below the coating has a passivating layer interposed between the coating and the surface.

Abstract: Apparatus for supporting a heat exchanger such as a condenser of an air conditioning system on a vehicle, for pivotal movement between an operational position and a position angularly related to the operational position, for such purposes as inspection, cleaning, service and maintenance, the apparatus being configured for holding the heat exchanger in the operational position, and for guiding and controlling movement thereof to the tilted position, and holding the heat exchanger in the tilted position.

Abstract: A device for cleaning contamination in heat exchangers, waste-heat boilers, or combustion chambers is provided. In some embodiments, the device comprises a tube, a blasting body, and a combustible gas mixture within the tube. In some embodiments, the tube is destroyed after blasting. In some embodiments, the device further comprises a second tube comprising a blasting cord that is connected to a fuse, wherein the second tube is coupled to the first tube by a hinge.

Abstract: A mobile heat exchanger cleaning system, in particular for power plant heat exchangers, allows a heat exchanger to be safely and reliably cleaned. The cleaning system has an apparatus for collecting, introducing and removing cleaning bodies, a pump for pumping a fluid with cleaning bodies and at least one connector connected with the apparatus and the pump for releasably connecting the cleaning system with a heat exchanger.

Abstract: A heat-dissipating fan having a dust-proof structure includes a stator and a rotor. The stator includes a shaft and a bearing disposed in a shaft hole of the shaft. The rotor includes an axle inserted in the bearing. The axle of the rotor has an inner end connected with an axle seat. The axle seat is located in the shaft hole of the shaft. A slight gap is defined between an outer wall of the axle seat and an inner wall of the shaft hole. The outer wall of the axle seat has a plurality of guiding grooves to block external air from entering the bearing. The guiding grooves are spiral grooves or V-shaped grooves. The guiding grooves are used to expel the air along with the rotation of the rotor, achieving a dust-proof protective structure in a non-contact type to block external dust or water vapor from entering the bearing to influence the running of the bearing. The present invention can enhance the service life of the heat-dissipating fan.

Abstract: A heat exchanger vessel (1) comprises a tubular outer shell (2) in which a bundle of substantially parallel heat exchanging tubes (7) is arranged between a pair of perforated disk-shaped partitioning walls (5, 6), an inlet (9) and outlet (10) for a first fluid, and at least one inlet (13, 14) and at least one outlet (16) for a second fluid, wherein at least one inlet (14) for the second fluid is provided with particle injection means for injecting cleaning particles into the space between the outer surfaces of the heat exchanger tubes (7) and the inner surface of the tubular shell (2) of the heat exchanger vessel (1) and at least one outlet (16) for the second fluid is connected to means for removing particles from the second fluid and for recirculating particles to at least one inlet (14) of the second fluid.

Abstract: The invention relates to a method and apparatus relate for the liquefaction of natural gas. In another aspect, the present invention concerns the deriming the interior surfaces of a cryogenic heat exchanger employed in the liquefaction of natural gas. In another aspect, the present invention concerns the utilization of a pump to derim the interior surfaces of a cryogenic heat exchanger.

Abstract: A heat exchanger comprises a substantially pillar sheathed heater, a substantially cylindrical case, and a spiral spring. The sheathed heater is accommodated in the case. The spring is provided so as to be wound around an outer peripheral surface of the sheathed heater. Thus, a spiral flow path is formed among an outer peripheral surface of the sheathed heater, an inner peripheral surface of the case, and the spring. The spring functions as a flow velocity conversion mechanism, a turbulent flow generation mechanism, a flow direction conversion mechanism, and an impurity removal mechanism. A water inlet and a water outlet are respectively arranged at positions eccentric from a central axis of the case on a side surface of the case.

Abstract: A rigid lance cleaning system includes rigid tubular lances that are movable between retracted and extended positions for delivering a cleaning fluid. Flexible hoses are connected to respective rigid tubular lances for delivering the cleaning fluid. A hose reel is configured to dispense the flexible hose when the rigid tubular lances extend and collect the flexible hoses when the rigid tubular lances retract. A frame movably supports the rigid tubular lances and a drive system is configured to selectively extend and retract the rigid tubular lenses.

Abstract: A heat exchanger may include a core control assembly movable between compressed and uncompressed positions, and a core. The core may have a plurality of layers with a plurality of passages interleaved therebetween, a portion of the passages extending and open to the periphery of the layers. The core control assembly may be operably coupled to the core to compress the core when the core control assembly is in its compressed position and to permit the core to expand from its compressed state when the core control assembly is moved away from its compressed position. The expansion of the core increases a cross-sectional area of the passages at the periphery of the core.

Abstract: A work vehicle operating in a highly contaminated environment has a radiator with a rotary screen debris removal device upstream of the radiator. The debris thus removed passes through a fan for disposal away from the work machine. The engine is an air breathing fuel consuming engine and has a pre-cleaner for removing larger particles of air delivered to the engine for combustion. A conduit extends from the intake air pre-cleaner to a venturi device adjacent to and upstream of the fan for continuously and effectively removing particles from the engine air pre-cleaner.

Abstract: Provided is an apparatus for inspecting a structure including a heating tube, a tube sheet supporting the heating tube, and a flow distribution baffle, which are installed in a steam generator of a nuclear power plant, and more particularly, an apparatus for visually inspecting and removing a foreign object in gaps of a bundle of heating tubes of an upper portion of a tube sheet of a secondary side of a steam generator, in which a detector is inserted into gaps of a bundle of heating tubes of an upper portion of a secondary side of a steam generator so as to inspect sludge or foreign objects, and a foreign object remover removes foreign objects when foreign objects are discovered in the gaps of the heating tubes.

Abstract: Fouling of heat exchange surfaces is mitigated by a process in which a mechanical force is applied to a fixed heat exchanger to excite a vibration in the heat exchange surface and produce shear waves in the fluid adjacent the heat exchange surface. The mechanical force is applied by a dynamic actuator coupled to a controller to produce vibration at a controlled frequency and amplitude output that minimizes adverse effects to the heat exchange structure. The dynamic actuator may be coupled to the heat exchanger in place and operated while the heat exchanger is on line.

Abstract: The invention relates to a heat exchange system (1) having a heat exchange module (2, 21, 22) including at least one first heat exchange module (21) with a heat exchanger (3), wherein an outer boundary of the heat exchange modules (2, 21, 22) is formed by an inflow surface (41) and an outflow surface (42) such that, for the exchange of heat between a transport fluid (5) and a heat transfer agent (6) flowing through the heat exchanger (3) in the operating state, the transport fluid (5) can be supplied to the heat exchange module (2, 21, 22) via the inflow surface (41), can be brought into flow contact with the heat exchanger (3) and can be led away again from the heat exchange module (2) via the outflow surface (42). In accordance with the invention, in this respect, a cleaning system (7) is provided with a cleaning flap (71).

Abstract: The invention relates to a modular heat exchange system (1) having a heat exchange module (2, 21, 22) which includes a first heat exchange module (21) with a heat exchanger (3). In this respect, an outer boundary of the heat exchange module (2) is formed by an inflow surface (4) and an outflow surface (5) such that, for the exchange of heat between a transport fluid (6) and a heat agent (7) flowing through the heat exchanger (3) in the operating state, the transport fluid (6) can be supplied to the heat exchange module (2) via the inflow surface (4), can be brought into flow contact with the heat exchanger (3) and can be led away again the heat exchange module (2) via the outflow surface (5). In accordance with the invention, a first boundary surface (81) of the first heat exchange module (2, 21) is inclined at a presettable angle of inclination (?) with respect to a second boundary surface (82) of the first heat exchange module (2, 21).

Abstract: A device is coupled to a heat exchanger for mitigating fouling by applying a mechanical force to a fixed heat exchanger to excite a vibration in the heat exchange surface and produce shear waves in the fluid adjacent the heat exchange surface while the heat exchanger is in operation. An electromagnetic driven impulse device induces vibration onto heat exchanger tubes and/or an acoustic wave through the liquid service fluid to reduce fouling. The device can be mounted directly onto the outer part or piping and produces acoustical/vibrational modes onto the tube or near the surface of tubes.

Abstract: This invention provides a thermal energy system comprising a heat exchanger for transferring thermal energy between a source and a load, the heat exchanger having a primary side associated with the source, and a secondary side for conducting a fluid associated with the load, wherein the secondary side of the heat exchanger is passively back-flushed upon consumption of a portion of the fluid. Passive back-flushing prevents fouling of the heat exchanger due to sediments, scale, and mineral deposits which may be present in the circulating fluid.

Abstract: An inline heat-exchanger cleaning system for an industrial production process employs liquid-borne cleaning bodies carried by the process liquid. Various solutions are provided to render the cleaning bodies compatible with a range of process conditions, including acidic conditions, high temperatures, and specific gravities significantly higher and significantly lower than water.

Abstract: The invention relates to a heat exchange system with a heat exchanger (1, 101, 102) including an inflow area (2) and an outflow area (3), wherein for the exchange of heat between a transport fluid (4) and a heat transfer agent (5) flowing through the heat exchanger (1, 101, 102) in the operational state, the transport fluid (4) can be conducted via an arriving flow area (200) of the heat exchange system and via the inflow area (2) to the heat exchanger (1, 101, 102), can be brought into flow contact with the heat exchanger (1, 101, 102) and can be led away again from the heat exchanger (1, 101, 102) via the outflow area (3). In accordance with the invention the heat exchange system (100) includes an automatic cleaning system (7) for the removal of contaminants (6).

Abstract: A cleaning system for a water-cooled heat exchanger has a collector, a driving device, a condenser, a ball trap and multiple cleaning balls. The collector has an opening, a filtering net, three inlet holes and two outlet holes. The driving device is connected to the collector and has an outlet tube, an inlet tube and a pump. The condenser is connected to the collector and has an inlet, an outlet, multiple copper pipes, an inlet pipe and an overflow pipe. The ball trap is connected to the condenser and the collector and has an inlet end, an outlet end, an internal surface, multiple turbulent blades, an entering pipe and a discharge pipe. The cleaning balls are movably mounted in the collector, the condenser and the ball trap with the cooling water and each cleaning ball has multiple cleaning protrusions and an eccentric rib.

Abstract: In the present invention, a dual hull cyclone is incorporated into a non-powered cleaning system using balls for tubular heat exchange systems. The dual hull cyclone separates balls which are smaller than a predetermined diameter so that they can be disposed of and replaced. The dual hull cyclone also serves to separate debris from fluid in the tubular heat exchange system and also debris that may have accumulated on the balls. The cleaning system in accordance with the present invention comprises a plurality of balls circulating in the fluid of the heat exchange system, a ball inlet, a ball outlet, and a dual hull cyclone. The balls in the fluid are generally of a predetermined diameter suitable for cleaning the tubes in the heat exchange unit. While the balls may be made of a variety of elastomeric materials, almost any resilient material may be utilized. Furthermore, the balls used in the present invention utilize a asymmetrical weighted core to increase the specific gravity of the balls.

Abstract: A method and a rapper device for cleaning a heat exchange surface in a pressure vessel. The rapper device comprises a striker rod which has one end contacting the heat exchange surface in the pressure vessel and one end projecting out of the pressure vessel via a passage opening. The rapper device also comprises an impacting device for impacting the projecting end of the striker rod. A section of the striker rod is slideably supported in a pressure chamber adjacent the passage opening. The pressure chamber is connected to a sealing gas supply maintaining the pressure in the pressure chamber at a higher level than the pressure in the pressure vessel. A bellows defines a pressure chamber around at least a section of the striker rod.

Abstract: A self-cleaning device of a filtering net is disposed in a wall-hanging type air conditioner and includes a filtering net with an upper filtering net and a front filtering net, which is disposed outside a heat exchanger and is used for absorbing dust in the air passing through the heat exchanger. A dust sweeping assembly with a detachable brush is disposed outside the filtering net, and is used for sweeping the dust adhered on the filtering net. A drive device with a drive motor and a transmission mechanism is used for driving the dust sweeping assembly to slide on the filtering net to sweep off the dust. A dust box is used for collecting the dust and is detachably disposed in the air conditioner to clear up the dust in the box. A dust exchanging device is disposed on the left or right side of the filtering net, and is used for transferring the dust swept out by the sweeping assembly into the dust box.

Abstract: A method and apparatus to reduce dust particles accumulated on one or more surfaces provisioned proximate to the pulsating fan. The surfaces may include a heat exchanger provisioned proximate to the pulsating fan and the blades of the pulsating fan or any other such surface. The pulsating fan may be rotated in a first direction for a first time duration and in a second direction for a second time duration. The dust particles that are accumulated on the one or more surfaces provisioned proximate to the pulsating fan is reduced while the pulsating fan is rotated in the second direction. The second direction of rotation is reverse to the first direction of rotation. The pulsating fan may comprise an axial fan or a centrifugal fan.

Abstract: A method for transferring heat includes flowing a wastewater through a tank and flowing a fluid through a heat exchanger having an outer surface. The method further includes aerating the wastewater to produce a convective flow, contacting the outer surface of the heat exchanger with the convective flow to exchange heat, and cleaning the outer surface of the heat exchanger with the convective flow. A system for transferring heat includes a tank, a heat exchanger with an outer surface disposed in the tank, and a fluid flowing through the heat exchanger. Wastewater located in the tank flows over the outer surface of the heat exchanger, and a diffusion pipe disposed in the tank provides air into the tank to produce a convective flow in the wastewater.

Abstract: Prepackaged cleaning compositions are described which are suitable for on-site dilution, and for cleaning substrates such as air conditioner coils.