A method is used for cleaning heat exchanger systems. The method is performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method determines component percentages of a cleaning solution based, at least in part, on operational parameters of a heat exchanger system. The operational parameters include chemical composition of fluids passing through the heat exchanger system and operating temperatures of the fluids passing through the heat exchanger system. The component percentages of the cleaning solution include: (1) hydrogen peroxide, 2-90 wt. %; (2) a complexing agent, 3-30 wt. %; (3) water-soluble calixarene, 0.01-10 wt. %; and (4) water. The complexing agent includes a polybasic organic acid or a sodium salt thereof, or a derivative of phosphorous acid.

A method is used for cleaning heat exchanger systems. The method is performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method determines component percentages of a cleaning solution based, at least in part, on operational parameters of a heat exchanger system. The operational parameters include chemical composition of fluids passing through the heat exchanger system and operating temperatures of the fluids passing through the heat exchanger system. The component percentages of the cleaning solution include: (1) hydrogen peroxide, 2-90 wt. %; (2) a complexing agent, 3-30 wt. %; (3) water-soluble calixarene, 0.01-10 wt. %; and (4) water. The complexing agent includes a polybasic organic acid or a sodium salt thereof, or a derivative of phosphorous acid.

Cleaning compositions include (a) a carrier liquid; (b) a metal citrate and/or a plurality of reagents configured to generate the metal citrate in situ; (c) one or a plurality of non-ionic surfactants; and (d) an organophosphate hydrotrope configured to increase solubility of the one or the plurality of non-ionic surfactants in the carrier liquid. Methods for cleaning engine cooling systems are described.

Cleaning compositions include (a) a carrier liquid; (b) a metal citrate and/or a plurality of reagents configured to generate the metal citrate in situ; (c) one or a plurality of non-ionic surfactants; and (d) an organophosphate hydrotrope configured to increase solubility of the one or the plurality of non-ionic surfactants in the carrier liquid. Methods for cleaning engine cooling systems are described.

A method and device for flushing an HVAC line, wherein an output line from a manifold is inserted into an HVAC service line and a first medium is connected to a first input line connected to the manifold and a second medium is connected to a second input line connected to the manifold. The flow of the first medium into the manifold using a first valve and/or flow of the second medium into the manifold using the second valve so that the first medium and/or second medium are selectively provided to the manifold and exit the manifold and enter the HVAC service line through the output line, and the outflow of the first medium and/or second medium out of the HVAC service line is monitored.

A laundry treating apparatus includes a duct system including an air discharge duct for discharging air inside the drum to an outside of the drum, an air supply duct for supplying air to the drum, and a connection duct for connecting the air discharge duct and the air supply duct to each other. The apparatus also includes a heat-absorber disposed inside the connection duct to remove moisture from air, and a heat-emitter disposed inside the connection duct to heat air passing through the heat-absorber. The apparatus further includes a water ejector disposed in the duct system and defining a water flow path for supplying water to the heat-absorber to remove foreign substances remaining on the heat-absorber.

A laundry treating apparatus includes a duct system including an air discharge duct for discharging air inside the drum to an outside of the drum, an air supply duct for supplying air to the drum, and a connection duct for connecting the air discharge duct and the air supply duct to each other. The apparatus also includes a heat-absorber disposed inside the connection duct to remove moisture from air, and a heat-emitter disposed inside the connection duct to heat air passing through the heat-absorber. The apparatus further includes a water ejector disposed in the duct system and defining a water flow path for supplying water to the heat-absorber to remove foreign substances remaining on the heat-absorber.

A machine that includes a cooling package and a method for cleaning debris from the cooling package is disclosed. The cooling package may include a housing, a cooler, a heat exchanger, a conduit, and plurality of nozzles mounted on the conduit. The cooler may be configured to receive heated machine fluid generated by the machine. The heat exchanger may be configured to convey heat away from the cooler and may include a plurality of fins coupled to and extending outward from the cooler. The plurality of fins may define a plurality of channels. The conduit may be disposed between the housing and the plurality of fins. The plurality of nozzles are configured to discharge a fluid on the fins. The fluid may be air or a release agent. In some embodiments, a release agent may be discharged on the fins prior to the discharge of air on the fins.

A contaminant-flushing machine for removing contaminants from a container, such as an engine transmission, air-conditioner coil, or transmission cooler, which includes hoses for coupling to the transmission cooler and a pump for circulating fluid through the hoses and the transmission cooler, the flushing machine being configured to terminate all circulating of fluid when a pressure drop is detected during times when the fluid is circulating only in the primary flow direction, but not when the flow direction is being reversed.

A contaminant-flushing machine for removing contaminants from a container, such as an engine transmission, air-conditioner coil, or transmission cooler, which includes hoses for coupling to the transmission cooler and a pump for circulating fluid through the hoses and the transmission cooler, the flushing machine being configured to terminate all circulating of fluid when a pressure drop is detected during times when the fluid is circulating only in the primary flow direction, but not when the flow direction is being reversed.