The present invention relates to a drain system for recovering thermal energy from a flow of shower or faucet greywater. The drain system comprises: a drain collector having a receiving surface for receiving greywater, and a drain collector outlet formed in the receiving surface for discharging greywater from the receiving surface; a heat exchanger configured to heat a flow of incoming cold water with the greywater; an upstream filter and a downstream filter, arranged to filter the greywater flowing along the receiving surface to the drain collector outlet, wherein the upstream filter comprises a first filter screen protruding from the receiving surface and the downstream filter comprises a second filter screen arranged upstream the drain collector outlet.
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
B01D 29/01 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with flat filtering elements
B01D 29/44 - Edge filtering elements, i.e. using contiguous impervious surfaces
B01D 29/56 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
B01D 36/02 - Combinations of filters of different kinds
B01D 36/04 - Combinations of filters with settling tanks
E03C 1/264 - Separate sieves or similar object-catching inserts
A drain system for recovering thermal energy from a flow of shower or faucet greywater. The drain system comprises: a drain inlet for receiving greywater; a heat exchanger configured to heat a flow of incoming cold water with the greywater flowing from a grey water inlet to a grey water outlet; and a water level control pipe portion arranged downstream of the grey water outlet. The drain system further comprises a downcomer arranged downstream of the water level control pipe portion. The downcomer comprises a contraction for increasing the flowrate of greywater from the grey water inlet to the grey water outlet.
The present invention relates to a drain system (30) for recovering thermal energy from a flow of shower or faucet greywater. The drain system (30) comprises a first drain system inlet (32) for receiving greywater; a drain system outlet (136) for discharging greywater to a drain; and a heat exchanger (70) comprising a grey water inlet (72) arranged downstream of the drain system inlet (32), and a grey water outlet (74) arranged upstream of the drain system outlet (136), the heat exchanger being configured to heat a flow of incoming cold water with the greywater flowing from the grey water inlet (72) to the grey water outlet (74). The drain system (30) further comprises a second drain system inlet (133) for receiving greywater; a by-pass conduit (138) arranged downstream of the second drain system inlet (133) and upstream of the drain, the by-pass conduit (138) being configured to provide a greywater by-pass of the heat exchanger (70); and an indicator (20, 20') configured to indicate a flow of greywater bypassing the heat exchanger in the by-pass conduit (138).
A shower drain system for recovering thermal energy from a flow of shower greywater comprises: a drain cup for receiving shower greywater, and a heat exchanger arranged downstream of the drain cup, the heat exchanger being configured to heat a flow of incoming cold water with the shower greywater, wherein the drain cup comprises a nozzle arranged and configured to supply hot water into the drain cup.
The present invention relates to a drain system (30, 130) for recovering thermal energy from a flow of shower or faucet greywater. The drain system (30, 130) comprises: a drain inlet (32, 132) for receiving greywater; a heat exchanger (70) configured to heat a flow of incoming cold water with the greywater flowing from a grey water inlet (72) to a grey water outlet (74); and a water level control pipe portion (40, 140) arranged downstream of the grey water outlet (74). The drain system (30, 130) further comprises a downcomer (50, 150) arranged downstream of the water level control pipe portion (40, 140). The downcomer (50, 150) comprises a contraction (52) for increasing the flowrate of greywater from the grey water inlet (72) to the grey water outlet (74).
E03C 1/01 - Domestic plumbing installations for fresh water or waste waterSinks for combinations of baths, showers, sinks, wash-basins, closets, urinals, or the like
F24D 11/00 - Central heating systems using heat accumulated in storage masses
The present invention relates to a drain system for recovering thermal energy from a flow of shower or faucet greywater. The drain system comprises: a drain collector having a receiving surface for receiving greywater, and a drain collector outlet formed in the receiving surface for discharging greywater from the receiving surface; a heat exchanger configured to heat a flow of incoming cold water with the greywater; an upstream filter and a downstream filter, arranged to filter the greywater flowing along the receiving surface to the drain collector outlet, wherein the upstream filter comprises a first filter screen protruding from the receiving surface and the downstream filter comprises a second filter screen arranged upstream the drain collector outlet.
06 - Common metals and ores; objects made of metal
11 - Environmental control apparatus
19 - Non-metallic building materials
20 - Furniture and decorative products
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Floor drains of metal; Drains made of metal; Drain covers of metal; Metallic gutters. Shower fittings; Shower apparatus; Shower installations; Shower baths; Bathroom installations; Sanitary and bathroom installations and plumbing fixtures; Hot water installations; Shower bath installations; Showers; Shower cubicles. Drain gullies, not of metal; Sumps (non-metallic -) [structures]; Drains [other than of metal or plastic]. Drain traps [valves] of plastic. Services for the installation of drains; Cleaning of drains; Sewer pipe renovation; Sewer pipe cleaning; Sewer pipe maintenance; Services for the installation of sewers; Installation and repair of showers; Repair of heat recovery apparatus. Providing technical advice relating to energy-saving measures; Consultancy in the field of energy-saving.
8.
System for energy recovery and cleaning of heat exchangers in shower applications
A system is provided for heat recovery from shower greywater. An outlet for greywater is connected to a heat exchanger's inlet for greywater and the heat exchanger is designed so that a cold supply water flows in the opposite direction through the heat exchanger relative to the relatively hot greywater, so that heat exchange works under a counterflow principle and heat energy is transferred from the hot greywater to the cold supply water. A manifold having a nozzle outlet for hot supply water is connected to a waste pipe so that the manifold nozzle outlet for hot supply water opens into the waste pipe at a position downstream of the waste pipe inlet for greywater but upstream of the waste pipe outlet for greywater.
