US20170198982A1 - Floor drain - Google Patents
Floor drain Download PDFInfo
- Publication number
- US20170198982A1 US20170198982A1 US15/313,808 US201515313808A US2017198982A1 US 20170198982 A1 US20170198982 A1 US 20170198982A1 US 201515313808 A US201515313808 A US 201515313808A US 2017198982 A1 US2017198982 A1 US 2017198982A1
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- US
- United States
- Prior art keywords
- drain
- waste water
- heat exchanger
- water
- floor drain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/22—Outlet devices mounted in basins, baths, or sinks
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0407—Floor drains for indoor use
- E03F5/0408—Floor drains for indoor use specially adapted for showers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0036—Domestic hot-water supply systems with combination of different kinds of heating means
- F24D17/0052—Domestic hot-water supply systems with combination of different kinds of heating means recuperated waste heat and conventional heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
- F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C2001/005—Installations allowing recovery of heat from waste water for warming up fresh water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/20—Sewage water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/06—Heat exchangers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Definitions
- the present invention relates to a floor drain according to the preamble of claim 1 .
- floor drains comprising a heat exchanger for recovery of a part of the energy present in hot waste water.
- the recovered energy can be used to preheat cold water before entering a water heater or before being mixed with hot water in an appliance where hot and cold water are to be mixed just before use.
- cold water and hot water are mixed in a mixer valve to obtain a desired temperature.
- Most modern mixer valves are temperature regulated such that a constant output temperature is achieved despite fluctuations in the cold water supply or the hot water supply. Thereby preheating of the cold water result in that less hot water is needed to maintain a given temperature.
- the amount of energy consumed to supply hot water is reduced, which results in reduced energy costs and environmental benefits.
- the heat exchanger comprises a tube received in a drain channel.
- the tube is provided with a feed for cold mains water and a discharge connected to a mixer tap for a shower.
- An upper cover with openings and a lower cover with openings are arranged recessed in the drain channel. Used shower water flows via the openings in the upper cover and in the lower cover and along the tube and heats the cold mains water before it is carried to the mixer tap.
- the drain channel is further provided with an outlet pipe connected to a sewer.
- the floor drain disclosed in document EP 2453194 A1 has several drawbacks.
- One drawback is that it is impossible to inspect the connection between the heat exchanger tube's feed for cold mains water and the conduit for cold mains water and the connection between the tube's discharge and the mixer tap when the floor drain is installed in a floor of a building.
- Yet another drawback is that if these connections get damaged it results in water leakage in the floor in which the floor drain is installed.
- a further drawback is that it is difficult and time consuming to install the floor drain in a floor because it is needed to make room for the connections in the floor, for example by removal of a section of the floor.
- the floor drain disclosed in document EP 2453194 A1 is cleaned by taking the upper cover and the lower cover out of the drain channel and washing and/or brushing the heat exchanger then left clear. It is thus difficult to clean the whole heat exchanger and it is not possible to clean all parts comprised in the floor drain, for example not the outlet pipe under the heat exchanger. Due to the fact that fouling agents, for example lime, from the waste water are easily gathered on the heat exchanger and that it is difficult to clean the whole heat exchanger, the thermal efficiency of the heat exchanger is easily deteriorated. Because hair and other impurities from the waste water tend to accumulate in the floor drain and because it is not possible to clean all parts comprised in the floor drain the risk of clogging of the floor drain is high.
- the subject of the present invention is to eliminate the drawbacks according to prior art.
- the floor drain comprises a drain compartment having a bottom, at least one side and an open upper portion.
- the bottom and the at least one side together define a space to collect waste water.
- the bottom comprises an opening for a drain trap.
- the floor drain further comprises a heat exchanger element, receivable in the space of the drain compartment, for transferring heat present in the waste water to fresh water.
- the heat exchanger element is provided with a first connection and a second connection.
- the first connection and the second connection are arranged inside the space of the drain compartment.
- a first conduit is connected to the first connection and a second conduit is connected to the second connection.
- the floor drain thereby it is easier and less time consuming to install the floor drain because it is not needed to make room for the first connection and the second connection in a floor of a building, for example by removal of a section of a floor. It is also possible to inspect the first connection and the second connection inside the space of the drain compartment. The risk of water leakage in the floor wherein the floor drain is installed is also reduced because if the first connection and/or the second connection get damage the water will leak inside the floor drain instead of in the floor of the building.
- the conduits connected to the first connection and the second connection should not have any connections hidden in the floor or in the walls of a building in order to eliminate the risk of water leakage in the floor and wall material.
- the first conduit is arranged to comprise fresh water having a first temperature and the second conduit is arranged to comprise fresh water having a second temperature.
- the heat exchanger element is pivotably arranged between a first and a second position. Thereby it is possible to bring the heat exchanger element in a position wherein the whole heat exchanger element is not received within the drain compartment. This results in that it is easy to clean the whole heat exchanger element and also in that it is possible to access and clean the parts arranged under the heat exchanger. Due to that it is easy to clean the whole heat exchanger element the heat exchanger element can be thoroughly cleaned. Thereby the risk of reduced thermal efficiency of the heat exchanger element is reduced. Due to the fact that it is possible to clean the parts arranged under the heat exchanger the risk of clogging of the floor drain is reduced.
- the drain compartment comprises at least one straight side.
- the heat exchanger element is pivotable about an axis, which axis is substantially parallel with the at least one straight side of the drain compartment.
- the first conduit for fresh water having a first temperature and the second conduit for fresh water having a second temperature comprise a flexible material. Thereby it is easy to pivot the heat exchanger element between the first position and the second position.
- the floor drain further comprises a partition wall removably arranged within the space of the drain compartment and comprising at least one waste water outlet and a drain control unit having walls encircling the at least one waste water outlet.
- the walls are protruding upward from the partition wall and also protruding above the heat exchanger element when the heat exchanger element is arranged in the first position.
- the floor drain further comprises a cover removably arranged upon the open upper portion of the drain compartment and provided with at least one first opening via which waste water is arranged to enter the space of the drain compartment.
- the cover makes it possible to give the floor drain a more aesthetic appearance.
- the first opening for waste water in the cover is orientated in relation to the at least one waste water outlet in the partition wall such that flow of waste water in the space of the drain compartment is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element.
- the floor drain further comprises a waste water guiding element removably arranged within the space of the drain compartment and arranged to slope downwards towards the heat exchanger element, with an angle a in relation to the open upper portion of the drain compartment.
- the waste water guiding element is provided with at least one second opening via which waste water is arranged to enter the space of the drain compartment.
- the at least one second opening is arranged in a lowermost part of the waste water guiding element.
- the waste water guiding element makes it possible to direct the flow of waste water inside the drain compartment.
- the at least one second opening for waste water in the waste water guiding element is orientated in relation to the at least one waste water outlet in the partition wall such that flow of waste water in the space of the drain compartment is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element.
- the angle a is preferably between about 0.01° and about 15°.
- a plurality of second openings are arranged in a row.
- the row of second openings prevents hair and other impurities from entering the drain compartment. Thereby the risk that hair and other impurities accumulate in the floor drain is reduced and in turn the risk of clogging of the floor drain is reduced.
- the floor drain further comprises a drain trap arranged in connection to the at least one waste water outlet.
- the fresh water having a first temperature is tap water.
- Tap water is advantageously used for bathing or washing.
- the second conduit for fresh water having a second temperature is connected to a water valve or a mixer valve and/or a water heater.
- the recovered heat is reused. Thereby the amount of energy consumed to supply hot water is reduced resulting in reduced energy costs and environmental benefits.
- FIG. 1-4 show schematic views illustrating the effect obtained by using the floor drain according to the present invention
- FIG. 5 shows a perspective view of the floor drain, wherein the floor drain is exploded, according to the present invention
- FIG. 6 shows a perspective view of the floor drain, wherein the floor drain is assembled, according to the present invention
- FIG. 7 shows a perspective view of the floor drain, wherein the heat exchanger element is in the first position, according to the present invention.
- FIG. 8 shows a perspective view of the floor drain, wherein the heat exchanger element is in the second position, according to the present invention.
- FIG. 1-4 show schematic views illustrating the effect obtained by using the floor drain 1 according to the present invention.
- the dashed lines are water and the straight arrows show the direction of the water flow.
- a shower is shown in FIG. 1-4 .
- the floor drain 1 together with a bath tub, a washing machine, a dish washer or any other appliance where hot and cold water are to be mixed just before use. The effect will first be described with reference to FIG. 1 .
- a shower head 46 is arranged above the floor drain 1 which is arranged in a floor 48 .
- the definition of a “floor drain” is a drain that is installed in a floor so that the top of the floor drain is substantially in the same level as the floor surface.
- the floor drain 1 comprises a heat exchanger element 14 arranged inside a drain compartment 2 .
- the heat exchanger element 14 is connected with a first connection 16 to a first conduit 18 for fresh water having a first temperature t1 and with a second connection 20 to a second conduit 22 for fresh water having a second temperature t2.
- the first connection 16 and the second connection 20 are arranged inside the drain compartment 2 in order to prevent water leakage outside the drain compartment 2 .
- the second conduit 22 for fresh water having a second temperature t2 is further connected to the inlet of a mixer valve 42 .
- the mixer valve 42 is further connected to a third conduit 50 for fresh water having a third temperature t3.
- the third conduit 50 for fresh water having a third temperature t3 is further connected to a water heater 44 which in turn is connected to the first conduit 18 for fresh water having a first temperature t1.
- the shower head 46 and the mixer valve 42 are connected to each other by a fourth conduit 51 for fresh water having a fourth temperature t4.
- fresh water having a first temperature t1 is supplied by the first conduit 18 to the heat exchanger element 14 in the floor drain 1 and to the water heater 44 .
- fresh water having a second temperature t2 is supplied by the second conduit 22 and fresh water having a third temperature t3 is supplied by the third conduit 50 to the mixer valve 42 .
- the mixer valve 42 the fresh water having a second temperature t2 and the fresh water having a third temperature t3 is mixed to supply fresh water having a fourth temperature t4 to the fourth conduit 51 and the shower head 46 .
- the first temperature t1 and the second temperature t2 is essentially the same.
- the first temperature t1 and the second temperature t2 can for example be 7° C.
- the fresh water having a third temperature t3 has been heated by the water heater 44 , thus the third temperature t3 is higher than the first temperature t1 and the second temperature t2.
- the third temperature t3 can for example be 60° C.
- the water supplied by the shower head 46 leaves the floor 48 through the floor drain 1 . If the fourth temperature t4 is higher than the first temperature t1, the floor drains 1 heat exchanger element 14 recuperates a part of the heat energy present in the waste water. (Any changes of the temperature of the water that is supplied by the shower head 46 is disregarded.)
- the fourth temperature t4 can for example be 37° C.
- the recuperated energy heats the water inside the heat exchanger element 14 .
- the second temperature t2 can for example be 25° C. and the temperature of the waste water leaving the floor drain 1 can for example also be 25° C.
- the fresh water having a third temperature t3 now is mixed with the fresh water having a second temperature t2, which second temperature t2 (as mentioned above) has been raised. Therefore less fresh water having a third temperature t3 needs to be used for obtaining fresh water having a constant fourth temperature t4. Thereby energy for heating up water is saved.
- the mixer valve 42 is a thermostatic mixer valve.
- a thermostatic mixer valve controls the relative proportions of hot and cold water, supplied to an outlet of the thermostatic mixer valve, in accordance with user selection of the outlet water temperature and a thermal control system to compensate for changes in the temperature and/or pressure and/or flow rate of the water supplied to an inlet of the thermostatic mixer valve to maintain the desired constant outlet water temperature.
- the mixer valve 42 can also be a mechanical mixer valve.
- a mechanical mixer valve cannot automatically compensate for changes in the temperature and/or pressure and/or flow rate of the water supplied to an inlet of the mechanical mixer valve. If the mixer valve 42 is a mechanical mixer valve, the user of the shower has to adjust the mixer valve 42 to compensate for changes in the temperature and/or pressure and/or flow rate of the water supplied to the inlet of the mechanical mixer valve to maintain a desired constant outlet water temperature.
- FIG. 2 is exactly the same as FIG. 1 except from that FIG. 1 shows a mixer valve 42 , a fourth conduit 51 and a shower head 46 and FIG. 2 shows two separate water valves 40 , 52 and a mixing element 54 .
- One water valve 52 is connected to the third conduit 50 for fresh water having a third temperature t3 and the other water valve 40 is connected to the second conduit 22 for fresh water having a second temperature t2.
- a mixing element 54 for example a funnel, to mix the water supplied by the second conduit 22 for fresh water having a second temperature t2 and the third conduit 50 for fresh water having a third temperature t3.
- a mixing element 54 for example a funnel
- the water valves 40 , 52 are connected after the water heater 44 and the heat exchanger element 14 . It is also possible, in for example pressure less systems, to connect the water valves 40 , 52 before the water heater 44 and the heat exchanger element 14 (this is not shown).
- FIG. 1 the recuperated energy is used to preheat water supplied to the mixer valve 42 and in FIG. 2 the recuperated energy is used to preheat water supplied to the inlet of the water valve 40 . It is also possible to preheat water supplied to the water heater 44 .
- FIG. 3 FIG. 1 and FIG. 3 is exactly the same except from that the water heater 44 is connected to the first conduit 18 for fresh water having a first temperature t1 in FIG. 1 and that the water heater 44 is connected to the second conduit 22 for fresh water having a second temperature t2 in FIG. 3 . Further, it is also possible to preheat water supplied to both the mixer valve 42 and the water heater 44 . This is shown in FIG. 4 .
- FIG. 4 is exactly the same as FIG.
- both the mixer valve 42 and the water heater 44 is connected to the second conduit 22 for fresh water having a second temperature t2 in FIG. 4 and that the mixer valve 42 is not connected to the second conduit 22 for fresh water having a second temperature t2 in FIG. 3 .
- the preheated water is often used for showering or washing, therefore the fresh water having a first temperature t1 advantageously is tap water.
- the tap water can be potable water or process water.
- FIG. 1-4 show, as mentioned above, that the first conduit 18 is connected to the heat exchanger element 14 with the first connection 16 and that the second conduit 22 is connected to the heat exchanger element 14 with the second connection 20 .
- the first connection 16 and the second connection 20 are, as mentioned above, arranged inside the drain compartment 2 . Thus, there are no connections connecting the heat exchanger element 14 to the first conduit 18 and to the second conduit 22 outside the drain compartment 2 .
- the second conduit 22 is continuous between the second connection 20 and the inlet of a mixer valve 42 in FIG. 1 and FIG. 4 , between the second connection 20 and the water valve 40 in FIG. 2 and between the second connection 20 and the water heater 44 in FIG. 3 and FIG. 4 .
- FIG. 5 shows a perspective view of the floor drain 1 , wherein the floor drain 1 is exploded and
- FIG. 6 shows a perspective view of the floor drain 1 , wherein the floor drain 1 is assembled.
- the floor drain 1 comprises the drain compartment 2 having a bottom 4 , four sides 6 and an open upper portion 8 .
- the sides 6 and the bottom 4 together define a space 10 to collect waste water.
- the floor drain 1 further comprises a heat exchanger element 14 , receivable in the space 10 of the drain compartment 2 , for transferring heat present in the waste water to the fresh water inside the heat exchanger element 14 .
- the bottom 4 of the drain compartment 2 comprises an opening 11 . The opening 11 assures that the waste water in the drain compartment 2 is emptied when the floor drain 1 is not used.
- the heat exchanger element 14 is connected with a first connection 16 to the first conduit 18 for fresh water having a first temperature t1 and with the second connection 20 to a second conduit 22 for fresh water having a second temperature t2.
- One side 6 of the drain compartment 2 comprises two openings 56 , 56 ′ (shown in FIG. 5 ).
- the first conduit 18 is arranged through the opening 56 and the second conduit 22 is arranged through the opening 56 . It is also possible to arrange the first conduit 18 through the opening 56 and to arrange the second conduit 22 through the opening 56 .
- the first conduit 18 and the second conduit 22 are thereby arranged both inside the drain compartment 2 and outside the drain compartment 2 (i.e. inside the floor 48 ).
- the dashed lines in FIG. 6-8 show the extension of the first conduit 18 and the second conduit 22 .
- a sealing (not shown) is arranged between the first conduit 18 and the opening 56 and a further sealing (not shown) is arranged between the second conduit 22 and the opening 56 ′ so that no water can exit from the drain compartment 2 , through the openings 56 , 56 and into the floor 48 .
- a pipe-in-pipe (also called PiP) is a pipe inserted inside a protective conduit pipe. If pipe-in-pipes are used, the outer protective conduit pipes function as sealings against the openings 56 , 56 ′.
- the fresh water entering the heat exchanger element 14 has the first temperature t1 and the fresh water exiting the heat exchanger element 14 has the second temperature t2.
- the fresh water inside the heat exchanger element 14 will absorb energy, from the waste water inside the drain compartment 2 , when passing through the heat exchanger element 14 and as a result the second temperature t2 is raised.
- the second temperature t2 becomes higher than the first temperature t1.
- the first connection 16 and the second connection 20 are arranged inside the space 10 of the drain compartment 2 .
- the first connection 16 and the second connection 20 can comprise couplings or be welded connections.
- the couplings can for example be swivel couplings.
- a swivel coupling is a coupling between two parts enabling one to revolve without turning the other. If the first connection 16 and the second connection 20 are arranged as swivelling couplings, the heat exchanger element 14 is allowed to be pivoted between a first position pi and a second position p 2 . Thereby the first connection 16 and the second connection 20 can be flexible connections.
- the conduits 18 , 22 may be made of a stiff material, such as copper or steel.
- the heat exchanger element 14 is preferably made of a material with a high thermal conductivity and a high corrosion resistance, for example copper, to achieve high heat exchange efficiency between the waste water in the drain compartment 2 and the fresh water inside the heat exchanger element 14 .
- the drain compartment 2 further comprises a partition wall 25 removably arranged within the space 10 of the drain compartment 2 and under the heat exchanger element 14 .
- the partition wall 25 comprises at least one waste water outlet 12 , 13 and a drain control unit 26 having walls 28 encircling a waste water outlet 12 .
- the walls 28 are protruding upward from the partition wall 25 and the walls 28 are also protruding above the heat exchanger element 14 when the heat exchanger element 14 is arranged in a first position pi. The first position pi is described further below. Thereby the whole heat exchanger element 14 is completely submerged in the waste water filled in the drain compartment 2 and the energy present in the waste water is efficiently transferred to the fresh water inside the heat exchanger element 14 .
- the waste water outlets 12 , 13 and the opening 11 allow completely emptying of the drain compartment 2 . Thereby the risk of reduced thermal efficiency of the heat exchanger element 14 is reduced.
- the ability to empty the drain compartment 2 also reduces the risk of mold formation in the waste water in the space 10 of the drain compartment 2 and thereby also the risk of obnoxious smells from the floor drain 1 is reduced.
- the floor drain 1 further comprises a waste water guiding element 34 removably arranged within the space 10 of the drain compartment 2 and above the heat exchanger element 14 .
- the waste water guiding element 34 is arranged to slope downwards towards the heat exchanger element 14 with an angle a in relation to the open upper portion 8 of the drain compartment 2 .
- the angle a is preferably between about 0.01° and about 15°.
- the waste water guiding element 34 is provided with second openings 36 via which waste water is arranged to enter the space 10 of the drain compartment 2 .
- the second openings 36 are arranged in a row in a lowermost part of the waste water guiding element 34 . It is preferable that the size of the second openings 36 is not too large to prevent foreign substances from flowing into the drain compartment 2 .
- the second openings 36 for waste water in the waste water guiding element 34 is orientated in relation to the waste water outlets 12 , 13 in the partition wall 25 such that flow of waste water in the space 10 of the drain compartment 2 is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element 14 .
- the heat exchanger element 14 is operated in counter flow. The best efficiency of a liquid-liquid heat exchanger is obtained if the two liquids, between which energy is transferred, flow in opposite directions.
- the partition wall 25 and/or the water guiding element 34 may be corrugated in order to guide waste water in suitable directions in between different parts of the heat exchanger element 14 .
- the floor drain 1 further comprises a cover 30 removably arranged upon the open upper portion 8 of the drain compartment 2 and provided with first openings 32 via which waste water is arranged to enter the space 10 of the drain compartment 2 .
- the first openings 32 for waste water in the cover 30 are preferably orientated in relation to the waste water outlets 12 , 13 in the partition wall 25 such that flow of waste water in the space 10 of the drain compartment 2 is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element 14 . In such way the heat exchanger element 14 is operated in counter flow.
- the floor drain 1 comprises a waste water guiding element 34
- the first openings 32 for waste water in the cover 30 are preferably arranged over the whole waste water guiding element 34 . In such way waste water is easily drained from the floor in which the floor drain 1 is arranged.
- the floor drain 1 can comprise a drain trap (not shown) in connection to the waste water outlets 12 , 13 .
- the drain trap can be arranged in the opening 11 . If the floor drain 1 does not comprise a drain trap it is called a scupper.
- the heat exchanger element 14 is pivotably arranged between a first position pi and a second position p 2 .
- the first position pi is a position wherein the whole heat exchanger element 14 is received within the drain compartment 2 , which is shown in FIG. 7 .
- the second position p 2 is a position wherein the whole heat exchanger element 14 is not received within the drain compartment 2 , which is shown in FIG. 8 .
- the heat exchanger element 14 can be pivotably arranged by using for example a first conduit 18 for fresh water having a first temperature t1 comprising a flexible material and a second conduit 22 for fresh water having a second temperature t2 comprising a flexible material. The flexible material will flex when the heat exchanger element 14 is pivoted between the positions pi and p 2 .
- the heat exchanger element 14 is pivotable about an axis A, which axis A is substantially parallel with one straight side 6 of the drain compartment 2 . It is possible for the floor drain 1 to have several straight sides 6 and it is also possible for the floor drain 1 to not have any straight sides 6 , for example if the floor drain 1 has a round shape.
- the heat exchanger element 14 is arranged in the first position pi.
- the cover 30 , the partition wall 25 and the waste water guiding element 34 are removed from the floor drain 1 and the heat exchanger element 14 is pivoted from the first position pi to the second position p 2 . Then it is possible to easily clean the cover 30 , the partition wall 25 , the waste water guiding element 34 and the heat exchanger element 14 . Thereby it is also possible to access a drain trap (not shown) if provided in the opening 11 .
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Abstract
The invention relates to a floor drain comprising a drain compartment having a bottom, at least one side and an open upper portion. The bottom and the at least one side together define a space to collect waste water. The bottom comprises an opening for a drain trap. The floor drain further comprises a heat exchanger element, receivable in the space of the drain compartment, for transferring heat present in the waste water to fresh water. The heat exchanger element is provided with a first connection and a second connection. The first connection and the second connection are arranged inside the space of the drain compartment. A first conduit is connected to the first connection and a second conduit is connected to the second connection.
Description
- This application is a U.S. National Stage patent application of International Patent Application No. PCT/SE2015/050528, filed on May 12, 2015, which claims priority to Swedish Patent Application No, 1450630-7, filed on May 27, 2014, each of which is hereby incorporated by reference in the present disclosure in its entirety.
- The present invention relates to a floor drain according to the preamble of
claim 1. - Usually, hot water discharge from appliances where hot and cold water are to be mixed just before use, for example showers and bath tubs, is led directly into floor drains without a substantial drop of temperature in the water. The accumulated heat in the water is thus not exploited completely before it is led out into a floor drain and thereby a significant amount of unused energy is lost. In terms of efficient use of energy it is undesirable to discharge hot waste water without recovering the energy present in the waste water.
- It is known to use floor drains comprising a heat exchanger for recovery of a part of the energy present in hot waste water. The recovered energy can be used to preheat cold water before entering a water heater or before being mixed with hot water in an appliance where hot and cold water are to be mixed just before use. Usually, cold water and hot water are mixed in a mixer valve to obtain a desired temperature. Most modern mixer valves are temperature regulated such that a constant output temperature is achieved despite fluctuations in the cold water supply or the hot water supply. Thereby preheating of the cold water result in that less hot water is needed to maintain a given temperature. Thus, the amount of energy consumed to supply hot water is reduced, which results in reduced energy costs and environmental benefits.
- An example of a known floor drain provided with a heat exchanger for recovering heat present in used shower water is shown in document EP 2453194 A1. The heat exchanger comprises a tube received in a drain channel. The tube is provided with a feed for cold mains water and a discharge connected to a mixer tap for a shower. An upper cover with openings and a lower cover with openings are arranged recessed in the drain channel. Used shower water flows via the openings in the upper cover and in the lower cover and along the tube and heats the cold mains water before it is carried to the mixer tap. The drain channel is further provided with an outlet pipe connected to a sewer.
- The floor drain disclosed in document EP 2453194 A1 has several drawbacks. One drawback is that it is impossible to inspect the connection between the heat exchanger tube's feed for cold mains water and the conduit for cold mains water and the connection between the tube's discharge and the mixer tap when the floor drain is installed in a floor of a building. Yet another drawback is that if these connections get damaged it results in water leakage in the floor in which the floor drain is installed. A further drawback is that it is difficult and time consuming to install the floor drain in a floor because it is needed to make room for the connections in the floor, for example by removal of a section of the floor.
- The floor drain disclosed in document EP 2453194 A1 is cleaned by taking the upper cover and the lower cover out of the drain channel and washing and/or brushing the heat exchanger then left clear. It is thus difficult to clean the whole heat exchanger and it is not possible to clean all parts comprised in the floor drain, for example not the outlet pipe under the heat exchanger. Due to the fact that fouling agents, for example lime, from the waste water are easily gathered on the heat exchanger and that it is difficult to clean the whole heat exchanger, the thermal efficiency of the heat exchanger is easily deteriorated. Because hair and other impurities from the waste water tend to accumulate in the floor drain and because it is not possible to clean all parts comprised in the floor drain the risk of clogging of the floor drain is high.
- As a consequence, in light of the above drawbacks, there is a need of an improved floor drain which provides the possibility to inspect the above mentioned connections when the floor drain is installed in a floor of a building, which is easier and less time consuming to install in the floor, which reduces the risk of water leakage in the floor wherein the floor drain is installed, which reduces the risk of reduced thermal efficiency of the heat exchanger element and which reduces the risk of clogging.
- The subject of the present invention is to eliminate the drawbacks according to prior art.
- This subject has been fulfilled with the floor drain according to the claims.
- More specifically, the floor drain comprises a drain compartment having a bottom, at least one side and an open upper portion. The bottom and the at least one side together define a space to collect waste water. The bottom comprises an opening for a drain trap. The floor drain further comprises a heat exchanger element, receivable in the space of the drain compartment, for transferring heat present in the waste water to fresh water. The heat exchanger element is provided with a first connection and a second connection. The first connection and the second connection are arranged inside the space of the drain compartment. A first conduit is connected to the first connection and a second conduit is connected to the second connection.
- Thereby it is easier and less time consuming to install the floor drain because it is not needed to make room for the first connection and the second connection in a floor of a building, for example by removal of a section of a floor. It is also possible to inspect the first connection and the second connection inside the space of the drain compartment. The risk of water leakage in the floor wherein the floor drain is installed is also reduced because if the first connection and/or the second connection get damage the water will leak inside the floor drain instead of in the floor of the building. Thus, the conduits connected to the first connection and the second connection should not have any connections hidden in the floor or in the walls of a building in order to eliminate the risk of water leakage in the floor and wall material.
- In a further aspect of the invention the first conduit is arranged to comprise fresh water having a first temperature and the second conduit is arranged to comprise fresh water having a second temperature.
- In another aspect of the invention the heat exchanger element is pivotably arranged between a first and a second position. Thereby it is possible to bring the heat exchanger element in a position wherein the whole heat exchanger element is not received within the drain compartment. This results in that it is easy to clean the whole heat exchanger element and also in that it is possible to access and clean the parts arranged under the heat exchanger. Due to that it is easy to clean the whole heat exchanger element the heat exchanger element can be thoroughly cleaned. Thereby the risk of reduced thermal efficiency of the heat exchanger element is reduced. Due to the fact that it is possible to clean the parts arranged under the heat exchanger the risk of clogging of the floor drain is reduced.
- In another aspect of the invention the drain compartment comprises at least one straight side.
- In a further aspect of the invention the heat exchanger element is pivotable about an axis, which axis is substantially parallel with the at least one straight side of the drain compartment.
- In a further aspect of the invention the first conduit for fresh water having a first temperature and the second conduit for fresh water having a second temperature comprise a flexible material. Thereby it is easy to pivot the heat exchanger element between the first position and the second position.
- In yet another aspect of the invention the floor drain further comprises a partition wall removably arranged within the space of the drain compartment and comprising at least one waste water outlet and a drain control unit having walls encircling the at least one waste water outlet. The walls are protruding upward from the partition wall and also protruding above the heat exchanger element when the heat exchanger element is arranged in the first position. In such way the emptying of waste water through the waste water outlet encircled by the drain control unit is delayed and in turn the heat exchanger element is submerged in the waste water for a longer time. Thus, increased exchange of energy between the waste water and the water inside the heat exchanger element is obtained.
- In another aspect of the invention the floor drain further comprises a cover removably arranged upon the open upper portion of the drain compartment and provided with at least one first opening via which waste water is arranged to enter the space of the drain compartment. The cover makes it possible to give the floor drain a more aesthetic appearance.
- In a further aspect of the invention the first opening for waste water in the cover is orientated in relation to the at least one waste water outlet in the partition wall such that flow of waste water in the space of the drain compartment is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element. Thus, the heat exchanger is operated in counter flow and thereby the efficiency of the heat exchanger element is increased.
- In yet another aspect of the invention the floor drain further comprises a waste water guiding element removably arranged within the space of the drain compartment and arranged to slope downwards towards the heat exchanger element, with an angle a in relation to the open upper portion of the drain compartment. The waste water guiding element is provided with at least one second opening via which waste water is arranged to enter the space of the drain compartment. The at least one second opening is arranged in a lowermost part of the waste water guiding element. The waste water guiding element makes it possible to direct the flow of waste water inside the drain compartment.
- In another aspect of the invention the at least one second opening for waste water in the waste water guiding element is orientated in relation to the at least one waste water outlet in the partition wall such that flow of waste water in the space of the drain compartment is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element. Thus, the heat exchanger is operated in counter flow and thereby, as mentioned above, the efficiency of the heat exchanger element is increased.
- In a further aspect of the invention the angle a is preferably between about 0.01° and about 15°. Thereby the waste water flows along the waste water guiding element at a suitable rate.
- In yet another aspect of the invention a plurality of second openings are arranged in a row. The row of second openings prevents hair and other impurities from entering the drain compartment. Thereby the risk that hair and other impurities accumulate in the floor drain is reduced and in turn the risk of clogging of the floor drain is reduced.
- In another aspect of the invention the floor drain further comprises a drain trap arranged in connection to the at least one waste water outlet. Thereby the risk of obnoxious smells from the floor drain is reduced.
- In a further aspect of the invention the fresh water having a first temperature is tap water. Tap water is advantageously used for bathing or washing.
- In yet another aspect of the invention the second conduit for fresh water having a second temperature is connected to a water valve or a mixer valve and/or a water heater. Thus, the recovered heat is reused. Thereby the amount of energy consumed to supply hot water is reduced resulting in reduced energy costs and environmental benefits.
- Further embodiments and advantages of the present invention are evident from the following detailed description.
- In the following the invention is described with reference to embodiments of the present invention and the accompanying drawings, in which:
-
FIG. 1-4 show schematic views illustrating the effect obtained by using the floor drain according to the present invention, -
FIG. 5 shows a perspective view of the floor drain, wherein the floor drain is exploded, according to the present invention, -
FIG. 6 shows a perspective view of the floor drain, wherein the floor drain is assembled, according to the present invention, -
FIG. 7 shows a perspective view of the floor drain, wherein the heat exchanger element is in the first position, according to the present invention, and -
FIG. 8 shows a perspective view of the floor drain, wherein the heat exchanger element is in the second position, according to the present invention. -
FIG. 1-4 show schematic views illustrating the effect obtained by using thefloor drain 1 according to the present invention. InFIG. 1-4 , the dashed lines are water and the straight arrows show the direction of the water flow. A shower is shown inFIG. 1-4 . It is also possible to use thefloor drain 1 together with a bath tub, a washing machine, a dish washer or any other appliance where hot and cold water are to be mixed just before use. The effect will first be described with reference toFIG. 1 . - A
shower head 46 is arranged above thefloor drain 1 which is arranged in afloor 48. The definition of a “floor drain” is a drain that is installed in a floor so that the top of the floor drain is substantially in the same level as the floor surface. Thefloor drain 1 comprises aheat exchanger element 14 arranged inside adrain compartment 2. Theheat exchanger element 14 is connected with afirst connection 16 to afirst conduit 18 for fresh water having a first temperature t1 and with asecond connection 20 to asecond conduit 22 for fresh water having a second temperature t2. Thus, thefirst connection 16 and thesecond connection 20 are arranged inside thedrain compartment 2 in order to prevent water leakage outside thedrain compartment 2. - The
second conduit 22 for fresh water having a second temperature t2 is further connected to the inlet of amixer valve 42. Themixer valve 42 is further connected to athird conduit 50 for fresh water having a third temperature t3. Thethird conduit 50 for fresh water having a third temperature t3 is further connected to awater heater 44 which in turn is connected to thefirst conduit 18 for fresh water having a first temperature t1. Theshower head 46 and themixer valve 42 are connected to each other by afourth conduit 51 for fresh water having a fourth temperature t4. - During showering, fresh water having a first temperature t1 is supplied by the
first conduit 18 to theheat exchanger element 14 in thefloor drain 1 and to thewater heater 44. Further, fresh water having a second temperature t2 is supplied by thesecond conduit 22 and fresh water having a third temperature t3 is supplied by thethird conduit 50 to themixer valve 42. In themixer valve 42, the fresh water having a second temperature t2 and the fresh water having a third temperature t3 is mixed to supply fresh water having a fourth temperature t4 to thefourth conduit 51 and theshower head 46. - At the beginning of showering, the first temperature t1 and the second temperature t2 is essentially the same. The first temperature t1 and the second temperature t2 can for example be 7° C. The fresh water having a third temperature t3 has been heated by the
water heater 44, thus the third temperature t3 is higher than the first temperature t1 and the second temperature t2. The third temperature t3 can for example be 60° C. The water supplied by theshower head 46 leaves thefloor 48 through thefloor drain 1. If the fourth temperature t4 is higher than the first temperature t1, the floor drains 1heat exchanger element 14 recuperates a part of the heat energy present in the waste water. (Any changes of the temperature of the water that is supplied by theshower head 46 is disregarded.) The fourth temperature t4 can for example be 37° C. - The recuperated energy heats the water inside the
heat exchanger element 14. This results in that the second temperature t2 is increased (thus the second temperature t2 becomes higher than the first temperature t1) and in that the temperature of the waste water leaving thefloor drain 1 is decreased. In this stage, the second temperature t2 can for example be 25° C. and the temperature of the waste water leaving thefloor drain 1 can for example also be 25° C. - In the
mixer valve 42, the fresh water having a third temperature t3 now is mixed with the fresh water having a second temperature t2, which second temperature t2 (as mentioned above) has been raised. Therefore less fresh water having a third temperature t3 needs to be used for obtaining fresh water having a constant fourth temperature t4. Thereby energy for heating up water is saved. - Preferably, the
mixer valve 42 is a thermostatic mixer valve. A thermostatic mixer valve controls the relative proportions of hot and cold water, supplied to an outlet of the thermostatic mixer valve, in accordance with user selection of the outlet water temperature and a thermal control system to compensate for changes in the temperature and/or pressure and/or flow rate of the water supplied to an inlet of the thermostatic mixer valve to maintain the desired constant outlet water temperature. - The
mixer valve 42 can also be a mechanical mixer valve. A mechanical mixer valve cannot automatically compensate for changes in the temperature and/or pressure and/or flow rate of the water supplied to an inlet of the mechanical mixer valve. If themixer valve 42 is a mechanical mixer valve, the user of the shower has to adjust themixer valve 42 to compensate for changes in the temperature and/or pressure and/or flow rate of the water supplied to the inlet of the mechanical mixer valve to maintain a desired constant outlet water temperature. - It is also possible to not use a
mixer valve 42 at all. This is shown inFIG. 2 .FIG. 2 is exactly the same as FIG.1 except from thatFIG. 1 shows amixer valve 42, afourth conduit 51 and ashower head 46 andFIG. 2 shows twoseparate water valves element 54. Onewater valve 52 is connected to thethird conduit 50 for fresh water having a third temperature t3 and theother water valve 40 is connected to thesecond conduit 22 for fresh water having a second temperature t2. It is possible, but not necessary, to use a mixingelement 54, for example a funnel, to mix the water supplied by thesecond conduit 22 for fresh water having a second temperature t2 and thethird conduit 50 for fresh water having a third temperature t3. InFIG. 2 thewater valves water heater 44 and theheat exchanger element 14. It is also possible, in for example pressure less systems, to connect thewater valves water heater 44 and the heat exchanger element 14 (this is not shown). - In
FIG. 1 the recuperated energy is used to preheat water supplied to themixer valve 42 and inFIG. 2 the recuperated energy is used to preheat water supplied to the inlet of thewater valve 40. It is also possible to preheat water supplied to thewater heater 44. This is shown inFIG. 3 .FIG. 1 andFIG. 3 is exactly the same except from that thewater heater 44 is connected to thefirst conduit 18 for fresh water having a first temperature t1 inFIG. 1 and that thewater heater 44 is connected to thesecond conduit 22 for fresh water having a second temperature t2 inFIG. 3 . Further, it is also possible to preheat water supplied to both themixer valve 42 and thewater heater 44. This is shown inFIG. 4 .FIG. 4 is exactly the same asFIG. 3 except from that both themixer valve 42 and thewater heater 44 is connected to thesecond conduit 22 for fresh water having a second temperature t2 inFIG. 4 and that themixer valve 42 is not connected to thesecond conduit 22 for fresh water having a second temperature t2 inFIG. 3 . It is also possible to preheat water supplied to both thewater valve 40 and the water heater 44 (this is not shown). The preheated water is often used for showering or washing, therefore the fresh water having a first temperature t1 advantageously is tap water. The tap water can be potable water or process water. -
FIG. 1-4 show, as mentioned above, that thefirst conduit 18 is connected to theheat exchanger element 14 with thefirst connection 16 and that thesecond conduit 22 is connected to theheat exchanger element 14 with thesecond connection 20. Thefirst connection 16 and thesecond connection 20 are, as mentioned above, arranged inside thedrain compartment 2. Thus, there are no connections connecting theheat exchanger element 14 to thefirst conduit 18 and to thesecond conduit 22 outside thedrain compartment 2. - No hidden connections, such as coupling elements, are present between the
first connection 16 and thewater heater 44 inFIG. 1 andFIG. 2 and between thefirst connection 16 and themixer valve 42 inFIG. 3 andFIG. 4 . Thus, thefirst conduit 18 is continuous between thefirst connection 16 and thewater heater 44 inFIG. 1 andFIG. 2 and between thefirst connection 16 and themixer valve 42 inFIG. 3 andFIG. 4 . - There are also no hidden connections present between the
second connection 20 and the inlet of themixer valve 42 inFIG. 1 andFIG. 4 , between thesecond connection 20 and thewater valve 40 inFIG. 2 and between thesecond connection 20 and thewater heater 44 inFIG. 3 andFIG. 4 . Thus, thesecond conduit 22 is continuous between thesecond connection 20 and the inlet of amixer valve 42 inFIG. 1 andFIG. 4 , between thesecond connection 20 and thewater valve 40 inFIG. 2 and between thesecond connection 20 and thewater heater 44 inFIG. 3 andFIG. 4 - Since no such hidden connections are needed the risk of water leakage between the
conduit coupling element - The
floor drain 1 will further be described with reference toFIG. 5-8 .FIG. 5 shows a perspective view of thefloor drain 1, wherein thefloor drain 1 is exploded andFIG. 6 shows a perspective view of thefloor drain 1, wherein thefloor drain 1 is assembled. - The
floor drain 1 comprises thedrain compartment 2 having a bottom 4, foursides 6 and an openupper portion 8. Thesides 6 and the bottom 4 together define aspace 10 to collect waste water. Thefloor drain 1 further comprises aheat exchanger element 14, receivable in thespace 10 of thedrain compartment 2, for transferring heat present in the waste water to the fresh water inside theheat exchanger element 14. Thebottom 4 of thedrain compartment 2 comprises anopening 11. Theopening 11 assures that the waste water in thedrain compartment 2 is emptied when thefloor drain 1 is not used. - The
heat exchanger element 14 is connected with afirst connection 16 to thefirst conduit 18 for fresh water having a first temperature t1 and with thesecond connection 20 to asecond conduit 22 for fresh water having a second temperature t2. Oneside 6 of thedrain compartment 2 comprises twoopenings FIG. 5 ). Thefirst conduit 18 is arranged through theopening 56 and thesecond conduit 22 is arranged through theopening 56. It is also possible to arrange thefirst conduit 18 through theopening 56 and to arrange thesecond conduit 22 through theopening 56. Thefirst conduit 18 and thesecond conduit 22 are thereby arranged both inside thedrain compartment 2 and outside the drain compartment 2 (i.e. inside the floor 48). The dashed lines inFIG. 6-8 show the extension of thefirst conduit 18 and thesecond conduit 22. - Preferably, a sealing (not shown) is arranged between the
first conduit 18 and theopening 56 and a further sealing (not shown) is arranged between thesecond conduit 22 and theopening 56′ so that no water can exit from thedrain compartment 2, through theopenings floor 48. It is also possible to connect theheat exchanger element 14 with thefirst connection 16 to a pipe-in-pipe (not shown) and with thesecond connection 20 to a further pipe-in-pipe (not shown). A pipe-in-pipe (also called PiP) is a pipe inserted inside a protective conduit pipe. If pipe-in-pipes are used, the outer protective conduit pipes function as sealings against theopenings - The fresh water entering the
heat exchanger element 14 has the first temperature t1 and the fresh water exiting theheat exchanger element 14 has the second temperature t2. During showering (and if, as mentioned above, the fourth temperature t4 is higher than the first temperature t1) the fresh water inside theheat exchanger element 14 will absorb energy, from the waste water inside thedrain compartment 2, when passing through theheat exchanger element 14 and as a result the second temperature t2 is raised. Thus, the second temperature t2 becomes higher than the first temperature t1. - The
first connection 16 and thesecond connection 20 are arranged inside thespace 10 of thedrain compartment 2. Thefirst connection 16 and thesecond connection 20 can comprise couplings or be welded connections. The couplings can for example be swivel couplings. A swivel coupling is a coupling between two parts enabling one to revolve without turning the other. If thefirst connection 16 and thesecond connection 20 are arranged as swivelling couplings, theheat exchanger element 14 is allowed to be pivoted between a first position pi and a second position p2. Thereby thefirst connection 16 and thesecond connection 20 can be flexible connections. According to this embodiment, theconduits heat exchanger element 14 is preferably made of a material with a high thermal conductivity and a high corrosion resistance, for example copper, to achieve high heat exchange efficiency between the waste water in thedrain compartment 2 and the fresh water inside theheat exchanger element 14. - The
drain compartment 2 further comprises apartition wall 25 removably arranged within thespace 10 of thedrain compartment 2 and under theheat exchanger element 14. Thepartition wall 25 comprises at least onewaste water outlet drain control unit 26 havingwalls 28 encircling awaste water outlet 12. Thewalls 28 are protruding upward from thepartition wall 25 and thewalls 28 are also protruding above theheat exchanger element 14 when theheat exchanger element 14 is arranged in a first position pi. The first position pi is described further below. Thereby the wholeheat exchanger element 14 is completely submerged in the waste water filled in thedrain compartment 2 and the energy present in the waste water is efficiently transferred to the fresh water inside theheat exchanger element 14. Thewaste water outlets opening 11 allow completely emptying of thedrain compartment 2. Thereby the risk of reduced thermal efficiency of theheat exchanger element 14 is reduced. The ability to empty thedrain compartment 2 also reduces the risk of mold formation in the waste water in thespace 10 of thedrain compartment 2 and thereby also the risk of obnoxious smells from thefloor drain 1 is reduced. - The
floor drain 1 further comprises a wastewater guiding element 34 removably arranged within thespace 10 of thedrain compartment 2 and above theheat exchanger element 14. The wastewater guiding element 34 is arranged to slope downwards towards theheat exchanger element 14 with an angle a in relation to the openupper portion 8 of thedrain compartment 2. The angle a is preferably between about 0.01° and about 15°. The wastewater guiding element 34 is provided withsecond openings 36 via which waste water is arranged to enter thespace 10 of thedrain compartment 2. Thesecond openings 36 are arranged in a row in a lowermost part of the wastewater guiding element 34. It is preferable that the size of thesecond openings 36 is not too large to prevent foreign substances from flowing into thedrain compartment 2. - The
second openings 36 for waste water in the wastewater guiding element 34 is orientated in relation to thewaste water outlets partition wall 25 such that flow of waste water in thespace 10 of thedrain compartment 2 is directed in a direction essentially opposite to the direction of the fresh water in theheat exchanger element 14. Thus, theheat exchanger element 14 is operated in counter flow. The best efficiency of a liquid-liquid heat exchanger is obtained if the two liquids, between which energy is transferred, flow in opposite directions. - The
partition wall 25 and/or thewater guiding element 34 may be corrugated in order to guide waste water in suitable directions in between different parts of theheat exchanger element 14. - The
floor drain 1 further comprises acover 30 removably arranged upon the openupper portion 8 of thedrain compartment 2 and provided withfirst openings 32 via which waste water is arranged to enter thespace 10 of thedrain compartment 2. If thefloor drain 1 does not comprise a wastewater guiding element 34, thefirst openings 32 for waste water in thecover 30 are preferably orientated in relation to thewaste water outlets partition wall 25 such that flow of waste water in thespace 10 of thedrain compartment 2 is directed in a direction essentially opposite to the direction of the fresh water in theheat exchanger element 14. In such way theheat exchanger element 14 is operated in counter flow. If thefloor drain 1 comprises a wastewater guiding element 34, thefirst openings 32 for waste water in thecover 30 are preferably arranged over the whole wastewater guiding element 34. In such way waste water is easily drained from the floor in which thefloor drain 1 is arranged. Thefloor drain 1 can comprise a drain trap (not shown) in connection to thewaste water outlets - The drain trap can be arranged in the
opening 11. If thefloor drain 1 does not comprise a drain trap it is called a scupper. - The
heat exchanger element 14 is pivotably arranged between a first position pi and a second position p2. The first position pi is a position wherein the wholeheat exchanger element 14 is received within thedrain compartment 2, which is shown inFIG. 7 . The second position p2 is a position wherein the wholeheat exchanger element 14 is not received within thedrain compartment 2, which is shown inFIG. 8 . Theheat exchanger element 14 can be pivotably arranged by using for example afirst conduit 18 for fresh water having a first temperature t1 comprising a flexible material and asecond conduit 22 for fresh water having a second temperature t2 comprising a flexible material. The flexible material will flex when theheat exchanger element 14 is pivoted between the positions pi and p2. Theheat exchanger element 14 is pivotable about an axis A, which axis A is substantially parallel with onestraight side 6 of thedrain compartment 2. It is possible for thefloor drain 1 to have severalstraight sides 6 and it is also possible for thefloor drain 1 to not have anystraight sides 6, for example if thefloor drain 1 has a round shape. - During use of the
floor drain 1, for example during showering, theheat exchanger element 14 is arranged in the first position pi. During cleaning of thefloor drain 1, thecover 30, thepartition wall 25 and the wastewater guiding element 34 are removed from thefloor drain 1 and theheat exchanger element 14 is pivoted from the first position pi to the second position p2. Then it is possible to easily clean thecover 30, thepartition wall 25, the wastewater guiding element 34 and theheat exchanger element 14. Thereby it is also possible to access a drain trap (not shown) if provided in theopening 11. - The present invention is of course not in any way restricted to the preferred embodiments described above, but many possibilities to modifications, or combinations of the described embodiments, thereof should be apparent to a person with ordinary skill in the art without departing from the basic idea of the invention as defined in the appended claims.
Claims (16)
1. A floor drain, comprising;
a drain compartment having a bottom , at least one side and an open upper portion, wherein the bottom and the at least one side together define a space to collect waste water and wherein the bottom comprises an opening for a drain trap; and
a heat exchanger element, placed in the space of the drain compartment, for transferring heat present in the waste water to fresh water, which heat exchanger element is provided with a first connection and a second connection,
wherein the first connection and the second connection are arranged inside the space of the drain compartment, a first conduit is connected to the first connection, and a second conduit is connected to the second connection.
2. The floor drain according to claim 1 , wherein
the first conduit is arranged to have fresh water having a first temperature and that the second conduit is arranged to have fresh water having a second temperature.
3. The floor drain according to claim 2 , wherein the heat exchanger element is pivotably arranged between a first position and a second position.
4. The floor drain according to claim 1 , wherein the drain compartment comprises at least one straight side.
5. The floor drain according to claims 4 , wherein the heat exchanger element is pivotable about an axis, which axis is substantially parallel with the at least one straight side of the drain compartment.
6. The floor drain according to claim 3 ,
wherein the first conduit for fresh water having a first temperature and the second conduit for fresh water having a second temperature comprise a flexible material.
7. The floor drain according to claim 3 , further comprising a partition wall removably arranged within the space of the drain compartment and comprising at least one waste water outlet and a drain control unit having walls encircling the at least one waste water outlet, wherein the walls are protruding upward from the partition wall and wherein the walls are protruding above the heat exchanger element when the heat exchanger element is arranged in the first position.
8. The floor drain according to claim 1 , further comprising a cover removably arranged upon the open upper portion of the drain compartment and provided with at least one first opening via which waste water is arranged to enter the space of the drain compartment.
9. The floor drain according to claims 7 , wherein the first opening for waste water in the cover is orientated in relation to the at least one waste water outlet in the partition wall such that flow of waste water in the space of the drain compartment is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element.
10. The floor drain according to claim 1 , further comprising a waste water guiding element removably arranged within the space of the drain compartment and arranged to slope downwards towards the heat exchanger element, with an angle in relation to the open upper portion of the drain compartment, and provided with at least one second opening via which waste water is arranged to enter the space of the drain compartment, wherein the at least one second opening is arranged in a lowermost part of the waste water guiding element.
11. The floor drain according to claim 7 , wherein the at least one second opening for waste water in the waste water guiding element is orientated in relation to the at least one waste water outlet in the partition wall such that flow of waste water in the space of the drain compartment is directed in a direction essentially opposite to the direction of the fresh water in the heat exchanger element.
12. The floor drain according to claim 10 , wherein the angle is preferably between about 0.01° and about 15°.
13. The floor drain according to claim 10 , wherein a plurality of second openings are arranged in a row.
14. The floor drain according to claim 1 , further comprising a drain trap arranged in connection to the at least one waste water outlet.
15. The floor drain according to claim 1 , wherein the fresh water inside the heat exchanger element is tap water.
16. The floor drain according to claim 1 , wherein the second conduit for fresh water having a second temperature is connected to a water valve or a mixer valve and/or a water heater.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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SE1450630-7 | 2014-05-27 | ||
SE1450630 | 2014-05-27 | ||
PCT/SE2015/050528 WO2015183155A1 (en) | 2014-05-27 | 2015-05-12 | Floor drain |
Publications (1)
Publication Number | Publication Date |
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US20170198982A1 true US20170198982A1 (en) | 2017-07-13 |
Family
ID=54699352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/313,808 Abandoned US20170198982A1 (en) | 2014-05-27 | 2015-05-12 | Floor drain |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170198982A1 (en) |
EP (1) | EP3149253B1 (en) |
CA (1) | CA2950268A1 (en) |
DK (1) | DK3149253T3 (en) |
WO (1) | WO2015183155A1 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160341490A1 (en) * | 2014-01-17 | 2016-11-24 | Joulia Ag | Heat exchanger for a shower or bathtub |
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US20200072488A1 (en) * | 2018-08-28 | 2020-03-05 | Johnson Controls Technology Company | Systems and methods for adjustment of heat exchanger position |
US11220809B2 (en) * | 2017-03-14 | 2022-01-11 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Shower system |
USD942594S1 (en) * | 2019-11-13 | 2022-02-01 | Everhard Industries Pty Ltd | Drain grate |
WO2022124952A1 (en) * | 2020-12-07 | 2022-06-16 | Idéhuset Gasellen I Varberg Ab | A heat exchanger for a drain compartment, and a heat exchanger system |
USD987043S1 (en) * | 2019-10-23 | 2023-05-23 | Brandon Turk | Drain outlet |
WO2023104270A1 (en) | 2021-12-07 | 2023-06-15 | Knl Holding Hjørring Aps | Heat exchanger water trap |
WO2023214099A1 (en) * | 2022-05-02 | 2023-11-09 | Gonzalez Valiente Cesar | System for recovering heat from water from a shower, bath tub or similar |
EP4368783A1 (en) * | 2022-11-11 | 2024-05-15 | Kohler Mira Limited | Plumbing or ablutionary system with heat recovery |
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US12084848B2 (en) | 2019-02-18 | 2024-09-10 | Dalian Foresight Technology Co., Ltd. | Floor drain |
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FR3144262A1 (en) * | 2022-12-22 | 2024-06-28 | Tineko | device and heat exchanger assembly for gray water |
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- 2015-05-12 EP EP15799808.9A patent/EP3149253B1/en active Active
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Cited By (21)
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US10072897B2 (en) * | 2014-01-17 | 2018-09-11 | Joulia Ag | Heat exchanger for a shower or bathtub |
US20160341490A1 (en) * | 2014-01-17 | 2016-11-24 | Joulia Ag | Heat exchanger for a shower or bathtub |
US20170121951A1 (en) * | 2014-06-05 | 2017-05-04 | Alfa Laval Corporate Ab | Flushing assembly |
US9970183B2 (en) * | 2014-06-05 | 2018-05-15 | Alfa Laval Corporate Ab | Flushing assembly |
CN106759814A (en) * | 2017-01-24 | 2017-05-31 | 宁波高新区大维卫浴用品有限公司 | A kind of floor drain and its fit structure for reclaiming waste water heat energy |
US10006645B1 (en) * | 2017-01-27 | 2018-06-26 | Paul A. Howard | Greywater heat recovery with warm side agitation |
US11220809B2 (en) * | 2017-03-14 | 2022-01-11 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Shower system |
CN109974475A (en) * | 2017-12-28 | 2019-07-05 | 中冶置业集团有限公司 | A kind of recyclable device of waste water residual heat |
US10921015B2 (en) * | 2018-08-28 | 2021-02-16 | Johnson Controls Technology Company | Systems and methods for adjustment of heat exchanger position |
US20200072488A1 (en) * | 2018-08-28 | 2020-03-05 | Johnson Controls Technology Company | Systems and methods for adjustment of heat exchanger position |
CN109610567A (en) * | 2018-12-28 | 2019-04-12 | 中冶置业集团有限公司 | Toilet shower waste heat recovery system |
CN109667332A (en) * | 2019-02-02 | 2019-04-23 | 杭州卓维机械有限公司 | A kind of washing machine floor drain with choke preventing function |
US12084848B2 (en) | 2019-02-18 | 2024-09-10 | Dalian Foresight Technology Co., Ltd. | Floor drain |
USD987043S1 (en) * | 2019-10-23 | 2023-05-23 | Brandon Turk | Drain outlet |
USD942594S1 (en) * | 2019-11-13 | 2022-02-01 | Everhard Industries Pty Ltd | Drain grate |
WO2022124952A1 (en) * | 2020-12-07 | 2022-06-16 | Idéhuset Gasellen I Varberg Ab | A heat exchanger for a drain compartment, and a heat exchanger system |
EP4256242A4 (en) * | 2020-12-07 | 2024-09-04 | Idehuset Gasellen I Varberg Ab | A heat exchanger for a drain compartment, and a heat exchanger system |
WO2023104270A1 (en) | 2021-12-07 | 2023-06-15 | Knl Holding Hjørring Aps | Heat exchanger water trap |
WO2023214099A1 (en) * | 2022-05-02 | 2023-11-09 | Gonzalez Valiente Cesar | System for recovering heat from water from a shower, bath tub or similar |
EP4368783A1 (en) * | 2022-11-11 | 2024-05-15 | Kohler Mira Limited | Plumbing or ablutionary system with heat recovery |
SE2251553A1 (en) * | 2022-12-22 | 2024-06-23 | Enduce Ab | A drain system and a shower or shower cabin |
Also Published As
Publication number | Publication date |
---|---|
DK3149253T3 (en) | 2019-11-04 |
WO2015183155A1 (en) | 2015-12-03 |
EP3149253A1 (en) | 2017-04-05 |
EP3149253B1 (en) | 2019-08-14 |
CA2950268A1 (en) | 2015-12-03 |
EP3149253A4 (en) | 2018-02-28 |
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