A separating grid includes a separating unit arranged, when in use, in a position of inclination obliquely upwards in the direction of flow of running water, fixed grid bars, movable grid bars, and a drive unit connected to the movable grid bars to actuate the movable grid bars to interact with the solid particles and to draw the solid particles out of the running water and to carry the solid particles upwards along the fixed grid bars. A position detection device detects the top position or the bottom position of the movable grid bars. A water level detection device detects the water level of the running water. A control device controls the drive unit according to information from the position detection device regarding the position of the movable grid bars and information from the water level detection device regarding the water level.

Embodiments of the present disclosure reveal a base station and a cleaning robot system. The base station includes a base station body, provided with a cleaning tank; a liquid discharge apparatus, configured to spray cleaning liquid, where the cleaning liquid is accommodated in the cleaning tank; a filtration apparatus, located in the cleaning tank; and a detection apparatus, where at least part of the detection apparatus is positioned on the filtration apparatus, and the detection apparatus is configured to detect a liquid level in the cleaning tank.

A filtration unit (100) configured to remove microparticles from a water stream from at least one washing machine (WM) is provided. The filtration unit comprises an inlet (110) configured to deliver a water stream (WS) from at least one washing machine (WM), a water reservoir (120) configured to receive the water stream (WS) from the inlet (110), a separator module (130) fluidly connected to the water reservoir (120), wherein the separator module (130) is configured to separate microparticles (MP) from the water stream (WS) creating a filtered water stream (FWS), and an outlet (150) configured to allow the filtered water stream (FWS) to leave the filtration unit (100). A method for removing microparticles from a water stream is also provided.

In some embodiments, a system for pre-wetting a filter includes a filter, a piping system, a first gas, a second gas, a first buffer tank, and a second buffer tank. The first gas drives the solvent to clean the filter. The two buffer tanks store the solvent discharged from the filter. The second gas selectively drives the solvent in the first buffer tank to return to the filter and then to be discharged into the second buffer tank. Alternatively, the second gas selectively drives the solvent in the second buffer tank to return to the filter and then to be discharged into the first buffer tank.

A method of controlling the water level in ground in which drainage pipes have been laid, said method comprising: a) providing the ground with water passing through the drainage pipes in a natural way and/or by active intervention using a control system, b) creating an underpressure or overpressure of water and/or air in the drainage pipes by means of the control system, thereby causing water or air to be extracted from or supplied to the soil via the drainage pipes, and c) programming the programmable control system in such a manner that the control system determines the points in time, durations, volumes and/or order of the water supply to the drainage pipes and of the generation of an underpressure or overpressure of water and/or air.

The disclosure discloses a liquid level detection apparatus, including a floater and a floater accommodating portion, wherein the floater moves in the floater accommodating portion in a vertical direction; an upper clamping portion and a lower clamping portion are provided on the floater in the vertical direction, a moving groove is formed in the floater accommodating portion, the moving groove extends in the vertical direction, and the upper clamping portion and the lower clamping portion move in the moving groove in the vertical direction; and a clamping groove is formed in the moving groove extending along a horizontal direction, and when the liquid level detection apparatus inclines, the upper clamping portion offsets into the clamping groove to play a limiting role, such that the floater not easily be sucked by a suction force to block a suction port, thereby avoiding resulting in the phenomenon that an alarm is given when the water is not full in fact. The disclosure further discloses a sewage tank including the liquid level detection apparatus, and a cleaning device including the sewage tank.

A filtering module includes: a filtering device on which a sewage outlet used for discharging sewage carrying filtered impurities and a recovery device connected with the sewage outlet of the filtering device, wherein the recovery device is provided with at least two lint collection assemblies, and the lint collection assemblies mutually independently and/or jointly receive the sewage discharged from the filtering device and collect the filtered impurities in the sewage. At least two lint collection assemblies are arranged in the recovery device, and the at least two lint collection assemblies are used for collecting the filtered impurities, so that the total quantity of collectible filtered impurities can be increased, thereby prolonging the use period of the recovery device after each cleaning; and the lint collection assemblies can be cleaned separately, so that the use is more convenient.

The disclosure discloses a liquid level detection apparatus, including a floater and a floater accommodating portion, wherein the floater moves in the floater accommodating portion in a vertical direction; an upper clamping portion and a lower clamping portion are provided on the floater in the vertical direction, a moving groove is formed in the floater accommodating portion, the moving groove extends in the vertical direction, and the upper clamping portion and the lower clamping portion move in the moving groove in the vertical direction; and a clamping groove is formed in the moving groove extending along a horizontal direction, and when the liquid level detection apparatus inclines, the upper clamping portion offsets into the clamping groove, such that the floater not easily be sucked to block a suction port, thereby avoiding resulting in the phenomenon that an alarm is given when the water is not full in fact.

A coolant supply assembly includes an upper housing including a pre-filter mounting portion, a desiccant mounting portion, a pump mounting portion, and a main filter mounting portion on a top surface of the upper housing, the upper housing further including a flange portion at a first side surface of the upper housing and a coolant outlet at a second side surface opposite to the first side surface. The coolant supply assembly further includes a lower housing, the upper housing being mounted to the lower housing to define a coolant chamber, a pre-filter device mounted to the pre-filter mounting portion, a desiccant unit mounted to the desiccant mounting portion, a pump mounted to the pump mounting portion, a heat exchanger mounted to the flange portion, and a main filter device mounted to the main filter mounting portion.