The invention is applicable to the technical field of heat sinks, and provides a heat dissipating device and a vending machine. The heat dissipating device comprises a fan, a fan motor and a heat dissipating cavity; the fan is connected with the fan motor, and the heat dissipating cavity comprises a first end surface close to the fan and away from the fan. a second end surface; the first end surface and the second end surface further comprise a plurality of sets of heat dissipating copper tubes parallel to the first end surface and disposed in the same direction, and the heat dissipating copper tubes in each set of heat dissipating copper tubes are parallel to each other, and the same group of heat dissipating The copper tube is also covered with a wide gap metal mesh; wherein the fan motor is a positive and negative motor; when the vending machine refrigeration system is started, the fan motor is reversed within a preset time to drive the fan to reverse, so that the heat dissipation cavity is obtained. Wind power from the first end to the second end. The invention can clean the heat sink in time, so that the vending machine refrigeration system can operate stably and efficiently.

Provided is a method for cleaning an arbitrary fluid channel in a fluid flow device including a channel-forming body forming a plurality of fluid channels, a first header, and a second header. The method includes opening a cleaning-target channel included in the plurality of fluid channels and closing a non-cleaning-target channel which is the other fluid channel; and supplying a cleaning liquid to a cleaning-liquid supply header selected from the first header and the second header in a state where the non-cleaning-target channel is closed to cause the cleaning liquid to flow only through the cleaning-target channel.

A water quality management device is provided with a water quality index value acquisition unit which acquires water quality index values including a makeup water quality index value indicating water quality of makeup water and a circulating water quality index value indicating water quality of circulating water, and a determining unit which determines an amount of concentration control associated with a concentration rate of a circulating water system based on the water quality index values acquired by the water quality index value acquisition unit.

A water quality management device is provided with a water quality index value acquisition unit which acquires water quality index values including a makeup water quality index value indicating water quality of makeup water and a circulating water quality index value indicating water quality of circulating water, and a determining unit which determines an amount of concentration control associated with a concentration rate of a circulating water system based on the water quality index values acquired by the water quality index value acquisition unit.

The present document discloses water-treatment, descaling, and monitoring systems that include components selected from among: (1) water-treatment components; (2) a component that protects system components, plumbing, and appliances from limescale build-up by generation of a pure sine-wave descaling signal that passes FCC requirements; (3) a component that generates an electrolysis-inhibiting signal; (4) components that monitor propagation and the strength of the descaling signal within the plumbing system; (5) probe and sensor components that monitor water quality, the operational status of other components, and system characteristics; (6) components that prevent the descaling signal from interfering with probes, sensors, and water-treatment-system components; (7) a component that generates UV radiation for eliminating biological contaminants within water heaters and other appliances; and (8) wireless-communications components that facilitate transmission of alerts regarding operational status and water quality, remote control of system components in response to alerts, receiving system firmware and parameter updates, and transmitting status and monitoring data.

The present document discloses water-treatment, descaling, and monitoring systems that include components selected from among: (1) water-treatment components; (2) a component that protects system components, plumbing, and appliances from limescale build-up by generation of a pure sine-wave descaling signal that passes FCC requirements; (3) a component that generates an electrolysis-inhibiting signal; (4) components that monitor propagation and the strength of the descaling signal within the plumbing system; (5) probe and sensor components that monitor water quality, the operational status of other components, and system characteristics; (6) components that prevent the descaling signal from interfering with probes, sensors, and water-treatment-system components; (7) a component that generates UV radiation for eliminating biological contaminants within water heaters and other appliances; and (8) wireless-communications components that facilitate transmission of alerts regarding operational status and water quality, remote control of system components in response to alerts, receiving system firmware and parameter updates, and transmitting status and monitoring data.

A heat exchanger management system and a method of operating the heat exchanger management system. In one embodiment, the heat exchanger management system includes a memory and an electronic processor electrically connected to the memory and configured to operate one or more burners to transmit heat to a heat exchanger for a first period of time that deposits corrosive condensates on a passivation layer of the heat exchanger, deactivate the one or more burners for a second period of time, operate one or more blowers to move air across the heat exchanger at a temperature that evaporates the corrosive condensates on the passivation layer of the heat exchanger and increases an oxide thickness of the passivation layer on the heat exchanger, and reactivate the one or more burners after the second period of time.

A heat exchanger management system and a method of operating the heat exchanger management system. In one embodiment, the heat exchanger management system includes a memory and an electronic processor electrically connected to the memory and configured to operate one or more burners to transmit heat to a heat exchanger for a first period of time that deposits corrosive condensates on a passivation layer of the heat exchanger, deactivate the one or more burners for a second period of time, operate one or more blowers to move air across the heat exchanger at a temperature that evaporates the corrosive condensates on the passivation layer of the heat exchanger and increases an oxide thickness of the passivation layer on the heat exchanger, and reactivate the one or more burners after the second period of time.

A method for manufacturing boiler tubes includes the steps of removing end caps from a plurality of tubes, the plurality of tubes including at least a first tube and a second tube, cleaning an outer surface of the first tube and the second tube, forming a weld preparation on an upstream end of the first tube, forming a weld preparation on a downstream end of the second tube, welding the upstream end of the first tube to the downstream end of the second tube to form a butt weld, to produce a long tube, and with an automated device, measuring a parameter of at least the first tube and the second tube. The steps of removing the end caps, cleaning the outer surface of the tubes, forming the weld preparations, welding the first tube to the second tube, and measuring the parameter are performed autonomously.

A method for manufacturing boiler tubes includes the steps of removing end caps from a plurality of tubes, the plurality of tubes including at least a first tube and a second tube, cleaning an outer surface of the first tube and the second tube, forming a weld preparation on an upstream end of the first tube, forming a weld preparation on a downstream end of the second tube, welding the upstream end of the first tube to the downstream end of the second tube to form a butt weld, to produce a long tube, and with an automated device, measuring a parameter of at least the first tube and the second tube. The steps of removing the end caps, cleaning the outer surface of the tubes, forming the weld preparations, welding the first tube to the second tube, and measuring the parameter are performed autonomously.