The present invention relates to a heat recovery system, of a part of the energy spent in the preparation of waste water, e.g. water from baths or kitchens, energy that is usually lost when the water is drained into the sewer. This energy can be recovered and reused to heat water that is readily used, for example in the shower, or can be stored in a water heater. This system is designed in such a way that, together with any tub or shower base, constitutes a heat recovery shower base or a heat recovery bath, for example. The energy recovery system is composed, preferably, by a coil generally made of copper inside a PVC pipe that has at one end a throttle plate also made of PVC, a filter for the protection of the system against impurities, turbulence fins, and an external casing. The system has a compact structure which benefits its rapid adaptation.

The present invention provides a thermal energy exchanger for bathing shower water comprising an upper deck, a lower chassis and two hatches. The upper deck features creased top surface, multiple parallel septa and plural heat conducting ribs being created between each pair of adjacent septa. After having assembled, the circulation of internal water tunnel is configured into a continual zigzag duct to increase energy saving effect in consequence of improvement in heat exchanging efficiency of the water heater. With simple structure, it is easily fabricated by traditional extruding method without welding process and related welding technician. Thereby, selling price is reduced with marketing competitiveness because overall manufacturing cost is decreased so that the purchasing intention of the consumers is spurred. Thus, it is not only favorable to promote and penetrate marketing range and depth but also valuable to achieve energy saving and carbon reducing effect.

A flushing assembly comprising a foundation and a heat exchanging member. The foundation comprises a bowl shape providing an envelope surface defining an upper inlet and a lower outlet, the lower outlet being arranged to communicate with a drainage. The heat exchanging member comprises a helical channel defined between an upper and a lower wall, the helical channel having an extension along the envelope surface of the bowl shaped foundation, and the helical channel being arranged to be provided with a through flow of a secondary fluid. The flushing assembly is configured to provide a helical channel for a primary fluid extending between the envelope surface of the foundation and the lower wall of the heat exchanging member for guiding the primary fluid there through from the upper inlet to the lower outlet towards the drainage, thereby allowing heat exchange between the primary fluid and the secondary fluid.

A heat exchanger that includes a portion for heat exchange with gray water, a portion for heat exchange with clean water, the heat exchanger being arranged to transfer heat between the gray water heat-exchange portion and the clean water heat-exchange portion during a distribution of water and thereby heat a feedwater to a first temperature, wherein the heat exchanger includes a first heating means arranged to achieve the heating of the feedwater, for heating the feedwater to a second temperature, and wherein the heat exchanger includes a second heating means arranged to keep the clean water heat-exchange portion at a temperature greater than or equal to the first temperature during a period without water distribution.

The present disclosure relates to a recirculating shower system. The recirculating shower system may include a first shower outlet and a second shower outlet. The recirculating shower system may include a fresh water conduit fluidly coupled to the first shower outlet and a recirculated fluid conduit fluidly coupled to the second shower outlet. The fresh water conduit and the recirculated fluid conduit may be arranged such that warmer fresh water flowing through the fresh water conduit may heat cooler recirculated fluid flowing through the recirculated fluid conduit.

A tank for waste water partially or fully buried in the ground or immersed in water includes a wall made of a high thermal conductivity material, which in turn has a pair of walls forming a cavity creating a circuit of a convective fluid for heat exchange with both the waste water contained inside the tank and with the ground and/or groundwater external to the tank.

The present invention relates to a heat exchanger and a system for recovery of thermal energy from waste water. The heat exchanger comprises: an outer tube, an inner tube for waste water, and a control element, wherein said inner tube is arranged in said outer tube in such a way that a space is formed between said inner tube and said outer tube and wherein said control element is arranged in said space and is arranged to guide a medium in a helical movement around the inner tube so that thermal energy from said waste water is transferred to said medium.

A waste water diverter may have a housing, which encloses a cavity, a waste water inlet arranged at an upper end of the housing and opening into the cavity. The diverter may also have a grey water outlet and a black water outlet, which are connected to the cavity, and arranged at a lower end of the housing. A guide plate may be arranged in the cavity to be pivotable about an axis of rotation between a first position and a second position via a drive such that waste water flowing in through the waste water inlet is guided by the guide plate in the first position into the grey water outlet and the black water outlet is blocked, and in the second position the grey water outlet is blocked by the guide plate and the waste water is guided into the black water outlet.

A plumbing fixture includes a water passage configured to hold water, a first plate shaped according to a cross section of the water passage and spaced at a first distance from the water passage, and a second plate shaped according to the cross section of the water passage and spaced at a second distance from the water passage. A voltage between the first plate and the second plate is generated based on the water in the water passage.

The invention relates to a system and a method for preventing sediment formation in at least one tank during heat extraction of thermal energy from wastewater from properties, which the system comprises; at least one pump pit, a wastewater inlet, a pump, a pump pit outlet and a drain opening, at least one buffer tank, and at least one collector tank 1, a heat exchanger, in the collector tank, a heat pump, and an accumulator for accumulating heat. To avoid sediment formation, at least one of the pump pit, the buffer tank or the collector tank comprises at least one ejector for compressed air arranged therein, which ejector is connected to a compressed air device for controlling the supply of compressed air to at least one of the at least one pump pit, the buffer tank or the collector tank through the at least one ejector.