2results about How to "Reduce liquid flow" patented technology

This utility model discloses a floor heating water temperature and flow rate control device applied to a wall-mounted fireplace. The outlet and return ends of the wall-mounted fireplace are respectively connected to a manifold device that combines liquid distribution and flow rate regulation functions. The device is characterized in that a floor heating pipe is connected to one side of the manifold device at the outlet end, and the floor heating pipe is connected to the manifold device at the outlet end. A first temperature sensor is installed between the manifold device at the outlet end and the floor heating pipe, and a second temperature sensor is installed between the manifold device at the outlet end and the floor heating pipe. When regulating water temperature and flow rate, the device reads the water temperature at the inlet and outlet ends of the floor heating pipe through the first and second temperature sensors. Then, an electromagnetic flow meter is used to read the flow rate of the manifold device. The controller coordinates the control of the water pump, the manifold valve, and the wall-mounted fireplace to adjust the flow rate and temperature of the pipeline.

This invention relates to the field of automatic control technology, providing an automatic control device, method, and cleaning truck for a hose reel. The automatic control device includes: a hose reel speed monitoring module for collecting pulse signals when the hose reel of the cleaning truck rotates; and a control module including: a hose reel take-up unit for controlling the reel rotation to retract the hose when a hose reel signal is received. During the hose reel take-up process, the reel speed is determined and reduced based on the pulse signal, and the driving speed of the high-pressure water pump is reduced to decrease the liquid flow and pressure in the hose. Furthermore, the length of the retracted hose is determined based on the pulse signal, and the hose reel take-up operation is completed when the retracted hose length reaches a preset target take-up length. This achieves automatic hose reel take-up, effectively avoiding the problem of the high-pressure hose being rapidly pulled out of the underground pipe during the take-up process, causing the nozzle to swing uncontrollably and violently under the action of high-pressure water, creating a safety hazard.