Accommodation equipped with grey water sorting equipment

Abstract

Housing equipped with greywater sorting equipment. This housing includes an analysis cell (60) comprising a siphon (80) installed in a greywater outlet pipe. This siphon comprises: - a fixed body (82) equipped with an inlet pipe (90) and an outlet pipe (92) whose axes (94) of revolution coincide, - a plunger (84) interposed between the inlet pipes (90) and outlet pipes (92) to force the greywater to descend to a lower part (110) of the siphon before rising towards the outlet pipe, - a removable base (86) which completely surrounds the lower part, and - a turbidity sensor (124) fixed, without any degrees of freedom, to the siphon to measure the turbidity of the greywater in the lower part (110) of the siphon or between the lower part and an inlet of the outlet pipe. Fig. 2

Description

Title of the invention: Housing equipped with greywater sorting equipment

[0001] The invention relates to a dwelling equipped with grey water sorting equipment and an analysis cell for this dwelling.

[0002] Greywater sorting equipment makes it possible to construct a greywater recycling plant. Such a plant makes it possible to recycle a portion of the greywater produced by a dwelling in order to limit its water consumption.

[0003] Several decades ago, it was already proposed to recycle greywater generated by certain specific sources of greywater in a dwelling, such as a washing machine or a sink. Such prior art is disclosed, for example, in the following patent applications: CN104841179B and CN101892690B. At that time, dwellings lacked a greywater system separate from the blackwater system. In this context, the only solution for recycling greywater, for example from a washing machine or a sink, was to install local greywater treatment equipment near the greywater source. This equipment was connected directly to the greywater outlet of the source, before the greywater was injected into the blackwater system.Indeed, if a dwelling only has a blackwater system, greywater must be diverted to the sorting facility before entering the blackwater system. Once greywater is injected into the blackwater system, it can no longer be recycled because it may have been contaminated by blackwater. These facilities were therefore designed to recycle greywater from only one source at a time. Thus, the absence of a greywater system in a dwelling necessitated the installation of as many sorting facilities as there were sources of greywater to be recycled.

[0004] Recently, new dwellings have been equipped with a greywater system, separate from the blackwater system. This greywater system has several inlets located near the greywater sources in the dwelling, to which these different greywater sources are simultaneously connected. For example, the shower, bathtub, sinks, and washing machine in the dwelling are all connected to a respective inlet of the greywater system. The greywater system collects the greywater from all these sources and combines it into a single horizontal outlet pipe typically located in the crawl space. New greywater treatment equipment has been developed to treat the greywater received through the outlet pipe of the greywater system. An example of such equipment capable of treating the greywater collected by the greywater system is described. In application CN101418585A, an analysis cell is planned to analyze the degree of dirtiness of the collected greywater. This analysis cell includes a collection tank equipped with a turbidity sensor. The collection tank is connected to the outlet of the greywater pipe. Based on the turbidity sensor readings, the greywater received in the collection tank is either pumped to a larger storage tank or discharged into the sewer system if it is deemed too dirty. The collection tank is necessary to completely fill the cross-section of the channel housing the turbidity sensor with greywater. If the channel containing the turbidity sensor is not fully filled with greywater at the time of measurement, the measurements will be of poor quality.This is because turbidity sensors are sensitive to the presence of air, for example in the form of bubbles, in the liquid whose turbidity is being measured. When greywater does not completely fill the channel's cross-section, the remaining portion is filled with air, which interferes with the measurement. Furthermore, the collection tank must be large enough to prevent overflowing when the incoming greywater flow rate exceeds the greywater flow rate in the channel where the turbidity sensor is installed. Typically, for this reason, the collection tank volume exceeds several tens of liters.

[0005] Such an installation is perfectly suited to a dwelling equipped with a greywater system separate from the blackwater system. However, as mentioned previously, the greywater outlet pipe is often horizontal and located in a confined space such as a crawl space. Installing a collection tank in a confined space proves difficult because the collection tank is bulky. Therefore, there may not be enough space to install the collection tank.

[0006] The invention aims to remedy this drawback by offering a housing equipped with sorting equipment that is simpler to install.

[0007] The invention therefore relates to a housing comprising:

[0008] - several greywater sources selected from the group consisting of a machine washing clothes, a shower, a bathtub and a sink,

[0009] - toilets,

[0010] - a grey water network comprising a single horizontal outlet pipe grey water, this grey water network being connected to the aforementioned several grey water sources and arranged to collect the grey water from these grey water sources in the horizontal outlet pipe,

[0011] - a black water network, separate from the grey water network, which connects the toilets to sewer system,

[0012] - grey water sorting equipment comprising:

[0013] a) a set of controllable solenoid valves capable of directing the grey water flowing in the grey water outlet pipe towards a fluidly recycled grey water storage tank connected to a grey water consumer and, alternately, towards the sewer system,

[0014] b) a cell for analyzing the turbidity of the grey water flowing in the grey water outlet pipe, this analysis cell comprising for this purpose a turbidity sensor,

[0015] c) a computer programmed to determine the degree of dirtiness of the grey water flowing into the grey water outlet pipe from the turbidity measured by the turbidity sensor and to control, according to the determined degree of dirtiness, the set of solenoid valves to direct the grey water to the sewer system when the degree of dirtiness exceeds a predetermined threshold and, otherwise, to control the set of solenoid valves to direct the grey water to the recycled grey water tank,

[0016] wherein the analysis cell comprises a siphon installed in the grey water outlet pipe, this siphon comprising:

[0017] - a fixed body equipped with:

[0018] — of an inlet pipe fluidically connected to an upstream portion of the grey water outlet pipe with a rotational axis,

[0019] — an outlet pipe fluidly connected to a downstream portion of the grey water outlet pipe having an axis of revolution coinciding with the axis of revolution of the inlet pipe,

[0020] - a plunger interposed between the inlet and outlet pipes to force the grey water must be carried down to a lower part of the siphon before rising back up towards the outlet pipe.

[0021] - a base that can be reversibly moved between a position mounted on the fixed body in which the base completely surrounds the lower part and forms, in combination with the fixed body, a grey water tank, and a disassembled position in which the base is detached from the fixed body, and

[0022] - wherein the turbidity sensor is fixed, without any degree of freedom, to the siphon to measure the turbidity of grey water in the lower part of the siphon or between the lower part and an inlet of the outlet pipe.

[0023] The embodiments of this dwelling may include one or more of the following characteristics:

[0024] 1) The dwelling includes a crawl space in which the pipe of The grey water outlet and the analysis unit are installed in this crawl space.

[0025] 2)

[0026] - the analysis cell also includes a temperature sensor capable of measuring the temperature of the grey water inside the siphon, and

[0027] - the computer is programmed to correct the turbidity sensor measurements by function of the measurements from this temperature sensor.

[0028] 3) For each source of greywater, the greywater network comprises, at the level of the connection point of this grey water source to the grey water network, an odor-proof siphon, this odor-proof siphon being separate from the siphon of the analysis cell.

[0029] 4) The dwelling includes at least one selected greywater recycling consumer in the group consisting of a toilet flush and an outdoor tap for watering a garden.

[0030] The invention also relates to an analysis cell for the construction of the above-mentioned housing, in which the analysis cell comprises a turbidity sensor and a siphon suitable for installation in the greywater outlet pipe, this siphon comprising:

[0031] - a fixed body equipped with:

[0032] — of an inlet pipe capable of being fluidly connected to an upstream portion of the grey water outlet pipe, which includes an axis of revolution,

[0033] — of an outlet pipe capable of being fluidly connected to a downstream portion of the grey water outlet pipe and having an axis of revolution coinciding with the axis of revolution of the inlet pipe,

[0034] - a plunger interposed between the inlet and outlet pipes to force the grey water must be carried down to a lower part of the siphon before rising back up towards the outlet pipe.

[0035] - a base that can be reversibly moved between a position mounted on the fixed body in which the base completely surrounds the lower part and forms, in combination with the fixed body, a grey water tank, and a disassembled position in which the base is detached from the fixed body, and

[0036] wherein the turbidity sensor is fixed, without any degree of freedom, on the siphon to measure the turbidity of grey water in the lower part of the siphon or between the lower part and the inlet of the outlet pipe.

[0037] Embodiments of this analysis cell may include one or more of the following characteristics:

[0038] 1) The turbidity sensor is fixed to the base.

[0039] 2) The cell also includes a temperature sensor fixed to the base.

[0040] 3)

[0041] - the turbidity sensor and the temperature sensor each have an end sensitive sensor housed inside the base to be immersed in the grey water tank of the siphon, and

[0042] - the cell further comprises an ultrasound generator fixed to the base to emit ultrasound that cleans both the sensitive ends of the turbidity sensor and the temperature sensor.

[0043] 4) The base has a bottom forming the lowest point of the siphon and the generator The ultrasonic sensor is fixed to the base of the base.

[0044] 5) The shortest distance between the axis of revolution of the inlet tube and the lower part of the siphon is greater than 10 cm.

[0045] 6) The internal volume of the siphon is less than 5 litres.

[0046] The invention will be better understood upon reading the following description, given solely by way of non-limiting example and made with reference to the drawings in which:

[0047] - [Fig. 1] is a schematic illustration of the architecture of a fitted dwelling of greywater sorting equipment,

[0048] - [Fig. 2] is a vertical cross-sectional view of an analysis cell of the equipment sorting of the [Fig.1],

[0049] - [Fig. 3] is a perspective view of a siphon of the analysis cell of the [Fig.2],

[0050] - [Fig.4] is an exploded view of the siphon of [Fig.3].

[0051] In this description, the terminology, conventions, and definitions of the terms used in this text are introduced in Chapter I. Detailed examples of embodiments are then described in Chapter II with reference to the figures. Variants of these embodiments are presented in Chapter III. Finally, the advantages of the different embodiments are specified in Chapter IV.

[0052] Chapter I: Definitions, terminology and conventions:

[0053] In the figures, the same references are used to designate the same elements.

[0054] In the remainder of this description, the well-known characteristics and functions of a person skilled in the art are not described in detail.

[0055] The figures are oriented with respect to a vertical Z direction. Terms such as "above", "below", "top", "bottom", "superior", "inferior" are defined with respect to the Z direction.

[0056] The expression "an element made of a material A" or the expression "an element made of material A" means that material A represents 90% or 95% of the mass of that element.

[0057] In this text, unless otherwise specified, the term “connect” means connect fluidly.

[0058] Chapter II: Examples of embodiments

[0059] Figure 1 represents a dwelling unit 2. This dwelling unit 2 has several greywater sources and a greywater network 4 for collecting the greywater generated by these different sources. For example, the dwelling unit 2 has the following greywater sources: a sink 10, a washing machine 12, and a shower 14. These greywater sources are usually located in different rooms of the dwelling. For example, the sink is located in the kitchen, the washing machine 12 in a laundry room, and the shower 14 in a bathroom.

[0060] Network 4 has an inlet in each room of dwelling 2 where there is a greywater source from which the greywater must be collected. Each greywater source in dwelling 2 is connected to the nearest inlet of network 4. Here, each inlet of network 4 is equipped with an odor trap. Each of these odor traps prevents the backflow of any unpleasant odors from network 4. To this end, each odor trap forms a small greywater reservoir that blocks the inlet of network 4. These odor traps can be screw-on type, U-shaped, or S-shaped. In this embodiment, network 4 includes:

[0061] - an odor-trapping siphon 20 to which the drain outlet is directly connected grey water from sink 10,

[0062] - an odor-control siphon 22 to which the drain outlet is directly connected grey water from machine 12, and

[0063] - an odor-control siphon 24 to which the drain outlet is directly connected grey water from shower 14.

[0064] The network 4 includes an outlet pipe 26 to which all the network 4 inlets are connected. For example, each inlet of the network 4 is connected, via a respective pipe, to the same drain stack 28. This stack 28 is generally vertical. The lower end of the stack 28 opens into the beginning of the pipe 26. The stack 28 is often located in a service duct of the dwelling 2. Unlike the stack 28, the pipe 26 extends horizontally. The pipe 26 is typically located inside a crawl space 29 of the dwelling 2. Thus, all the greywater from the dwelling 2 is gathered and collected in this pipe 26.

[0065] Dwelling 2 also includes a toilet 30 and a black water network 32 separate from network 4. On one side, network 32 has as many inlets as there are black water sources in dwelling 2, and on the opposite side, network 32 is connected to the sewer system. The sewer system is either a network of drains that carries black water to a treatment plant shared by a large number of dwellings, or a septic tank in the case of a widely dispersed single-family dwelling. The toilet bowl 30 is connected via an odor trap to an inlet of network 32. Network 4 is distinct from network 32 in the sense that network 4 is arranged so that only grey water can flow into network 4. No black water can flow into network 4.

[0066] Dwelling 2 also includes greywater consumers. A greywater consumer is a device that can be supplied directly with recycled greywater. Thus, a greywater consumer does not need to be supplied solely with potable water and can operate with recycled greywater. By way of illustration, dwelling 2 includes two greywater consumers, namely the toilet flush 34 of toilet 30 and a garden tap 36. The tap 36 is typically located on an exterior wall of dwelling 2. It is used for watering a garden or for other similar purposes.

[0067] Finally, dwelling 2 includes a greywater recycling system 40. This system 40 automatically collects greywater with a low degree of dirt content for reuse in supplying the greywater consumers of dwelling 2. In [Fig. 1], only the elements of the system 40 necessary for understanding the invention are shown. The other elements have been omitted to simplify [Fig. 1].

[0068] Installation 40 comprises:

[0069] - a grey water sorting device 42,

[0070] - a treatment pump 44,

[0071] - a filtration system 46,

[0072] - a 48-liter recycled greywater tank, and

[0073] - a 50 distribution pump.

[0074] The equipment 42 separates greywater with a high degree of dirt and therefore non-recyclable from greywater with a low degree of dirt and therefore recyclable. The equipment 42 automatically directs the non-recyclable greywater to the sewer system and the recyclable greywater to the tank 48. For this purpose, the equipment 42 includes an analysis cell 60, a set of solenoid valves 62, and a control unit 64.

[0075] The cell 60 measures at least the turbidity of the greywater flowing in the pipe 26. This cell 60 is described in more detail with reference to the following figures. The cell 60 is installed between an upstream and a downstream portion of the pipe 26. Here, the cell 60 is installed in the crawl space 29.

[0076] The set of solenoid valves 62 is controllable by the computer 64 to direct, according to measurements from the sensor 60, the grey water flowing in the pipe 26 to the sewer and, alternately, to the tank 48. To do this, the set 62 comprises one or more controllable solenoid valves. For example, in this embodiment, the set 62 comprises two solenoid valves 66 and 68. When the solenoid valve When valve 66 is open and solenoid valve 68 is closed, the grey water flowing into pipe 26 is directed directly to the sewer. Conversely, when solenoid valve 66 is closed and solenoid valve 68 is open, the grey water flowing into pipe 26 is directed to tank 48.

[0077] The control unit 64 is electrically connected to the cell 60 to receive its measurements and to each of the solenoid valves 66, 68 to control their opening and, alternately, closing. In particular, the control unit 64 is programmed to:

[0078] - determine the degree of dirtiness of the grey water currently flowing into the pipe 26, then

[0079] - compare the determined degree of soiling to a predetermined threshold, then

[0080] - if the determined degree of soiling exceeds the predetermined threshold, order the opening of solenoid valve 66 and, simultaneously, the closing of solenoid valve 68, to direct the grey water currently flowing inside pipe 26 solely to the sewer system, and

[0081] - if the determined degree of soiling is less than this predetermined threshold, order the opening of solenoid valve 68 and, simultaneously, the closing of solenoid valve 66 to direct the grey water currently flowing inside pipe 26 solely towards tank 48

[0082] Typically the calculator 64 includes a microprocessor 70 and a memory 72 containing the instructions executed by the microprocessor 70 to control the set 62 of solenoid valves.

[0083] The set 62 of solenoid valves and the calculator 64 can be installed inside the crawl space or outside.

[0084] Pump 44 is controlled to circulate greywater through filtration system 46 before entering tank 48. Here, pump 44 is controlled by the same computer as the sorting equipment 42, i.e., computer 64. For example, pump 44 is associated with a temporary tank into which the greywater to be recycled is discharged, and pump 44 is activated only when the greywater level in this temporary tank exceeds a predetermined threshold. The volume of the temporary tank is typically less than 100 l, 50 l, or 35 l.

[0085] The volume of the tank 48 is quite large, typically three, five, or ten times greater than the volume of the temporary tank. For example, the volume of the tank 48 is greater than 200 l or 300 l.

[0086] The pump 50 allows the recycled grey water stored in the tank 48 to be pumped to the recycled grey water consumer(s), i.e. here to the toilet flush 34 and to the tap 36. The starting and stopping of the pump 50 is for example also controlled by the computer 64.

[0087] Figures 2 to 4 show in more detail the analysis cell 60. The cell 60 comprises a siphon 80 with a base. This siphon 80 comprises a fixed body 82, a plunger 84 and a base 86.

[0088] The fixed body 82 is fixed, without any degree of freedom, on one side to the upstream portion of the pipeline 26 and, on the opposite side, to the downstream portion of the pipeline 26. For this purpose, the body 82 comprises an inlet pipe 90 and an outlet pipe 92. The pipes 90 and 92 are cylindrical tubes, each extending along the same horizontal axis 94. Typically, the cross-section of the pipes 90 and 92 is circular and centered on the axis 94, such that the axis 94 corresponds to their axis of revolution. The internal diameters of the pipes 90 and 92 are equal to the internal diameter of the pipeline 26.

[0089] The pipe 90 has an orifice 96 connected to the upstream portion of the conduit 26 and, on the opposite side, opens into the siphon 80. More precisely, opposite the orifice 96, the pipe opens into a section 98 of the essentially cylindrical body 82, the generatrices of which are vertical. This section 98 has a horizontal threaded opening 100 facing downwards.

[0090] The tubing 92 has an orifice 102 connected to the downstream portion of the pipe 26 and, on the opposite side, opens into the inside of the plunger 84. For example, the orifices 96, 102 are connected to the corresponding portions of the pipe 26 by push-fitting and gluing or by means of fittings.

[0091] The diver 84 is interposed between the pipes 90, 92 to force the grey water down to a lower part 110 of the siphon 80 before rising back up to the pipe 92. On [Fig.2], the direction in which the grey water flows inside the siphon 82 has been represented by dashed arrows.

[0092] In this embodiment, the plunger 84 comprises a cylindrical tube 112 and an elbow 114. The tube 112 extends downwards along a vertical axis 113 which passes through the center of the opening 100. The upper end of the tube 112 is connected, via the elbow 114, to the end of the tubing 92 located on the opposite side of its orifice 102. The cross-sections of the tube 112 and the elbow 114 are identical to the cross-section of the tubing 92.

[0093] The lower end of the tube 112 has a horizontal opening 116 which opens into the lower part 110 of the siphon 80. The lower part 110 of the siphon 80 is the part of the siphon located below the horizontal plane which contains the opening 116. Here, the lower end of the tube 112 is located below the opening 100.

[0094] In this embodiment, the lower end of the tube 112 is flared to define a horizontal section for the passage of grey water around the surface diver 84 S84. Here, the lower end of the tube 112 is shaped to that the surface S84 is equal to the surface area of ​​the cross-sections of the tubes 90 and 92.

[0095] In this embodiment, the body 82 and the plunger 84 form a single block of material. For example, they are made of plastic.

[0096] The base 86 is reversibly movable between a mounted position, illustrated in Figures 2 and 3, on the body 82 and a dismounted position. In the mounted position, the base 86 completely surrounds the lower part 110 and forms, with the section 98 of the body 82, a grey water reservoir 118. This reservoir 118 extends from the bottom of the base 86 to the lower walls of the pipes 90 and 92. The reservoir 118 is continuously filled with grey water during the operation of the cell 60. In particular, the reservoir 118 remains filled with grey water even when the grey water flow in the pipe 26 is zero.

[0097] In the disassembled position, the base 86 is detached from the fixed body so that it is possible to directly access the plunger 84.

[0098] Here, the base 86 is an essentially truncated conical base centered on the vertical axis 113. In the mounted position, its upper end is screwed onto the threaded opening 100.

[0099] The base 86 has two nozzles 120 and 122 for receiving, respectively, a turbidity sensor 124 and a temperature sensor 126. In [Fig. 2], to facilitate reading this figure, the nozzles 120 and 122 have been shown as being diametrically opposite with respect to the axis 113. However, as shown in [Fig. 3], in reality, in this embodiment, the axes of the nozzles 120 and 122 are perpendicular. In [Fig. 4], only the nozzle 120 is visible.

[0100] The nozzle 120 is a cylinder with a circular cross-section centered on a horizontal axis 130 that intersects the axis 113. The distance between the axis 130 and the axis 94 is greater than 10 cm and here greater than or equal to 15 cm. Generally, this distance is also less than 50 cm or 30 cm. Here, the shortest vertical distance between the tube 90 and the nozzle 120 is greater than 10 cm or 15 cm.

[0101] The nozzle 120 extends from the reservoir 118 to the outside of the siphon. More precisely, the nozzle 120 opens into the lower part 110. The nozzle 120 also has an annular rib 132 on the outside of the base 86.

[0102] The nozzle 122 is for example identical to the nozzle 120 except that it extends along a horizontal axis 134 perpendicular to the axis 130 and that it does not have an annular rib.

[0103] The sensor 124 has a sensitive end 140. When the sensor 124 is fixed to the base 86, the end 140 is flush with or protrudes inside the reservoir 118. The sensor 124 is fixed inside the nozzle 120 by a cap 142 which, by cooperation in shape with rib 132, keeps sensor 124 locked inside nozzle 120.

[0104] The temperature sensor 126 also has a sensitive end 144 which is flush or protrudes inside the reservoir 118. Here, the inside of the nozzle 122 is threaded and the temperature sensor 126 is screwed into the inside of the nozzle 122.

[0105] Sensors 124 and 126 are electrically connected to the computer 64 by wire links partially shown in [Fig.2].

[0106] The analysis cell 60 also includes an ultrasonic generator 150. The generator 150 generates ultrasound inside the reservoir 118 to clean the sensitive ends 140, 144 of the sensors 124, 126. For this purpose, the frequency of the generated ultrasound is between 35 kHz and 80 kHz and, preferably, between 35 kHz and 50 kHz. For example, here, the ultrasound frequency is 40 kHz.

[0107] To efficiently transmit the ultrasound to the sensitive end 140 and simultaneously to the sensitive end 144, the generator 150 is fixed to the base of the socket 82. More specifically, the base of the socket 86 is perforated to form a horizontal through orifice 152 centered on the axis 113. The orifice 152 is hermetically sealed by a metal disc 154. For example, the disc 154 is bonded around the entire periphery of the orifice 152. Here, the disc 154 is made of stainless steel.

[0108] The active face of the generator 150, i.e. the face which emits the ultrasound, is glued to the outer face of the pad 154. Thus, the same generator 150 is used to simultaneously clean the sensitive ends of the sensors 124 and 126. The glue used is for example an epoxy resin.

[0109] In the figures and in the description, the seals that might be necessary to ensure a seal between the base 86 and the body 82, between the sensor 124 and the nozzle 120, or between the sensor 126 and the nozzle 122, have been omitted. However, such seals may be provided as required.

[0110] The internal volume of the siphon 80 is less than 5 l. Here, the internal volume of the siphon 80 is less than or equal to 11. The internal volume corresponds to the maximum volume of water that the siphon 80 can contain between its orifices 96 and 102. For example, the maximum volume is measured by blocking the orifice 102 and then filling the siphon 80 with water through the orifice 96 until the water overflows.

[0111] For example, base 86 is made of plastic.

[0112] The installation of cell 60 in a crawl space is simple because it is enough to cut a portion of the pipe 26 and then replace the cut portion with the siphon 80. For this purpose, the fact that the axes of revolution of the pipes 90, 92 are coincident simplifies the installation of cell 60.

[0113] Maintenance of cell 60 is also very simple, as it is enough to unscrew the base 86 to remove the dirt that accumulates in the reservoir 118. Furthermore, dismantling the base 86 also allows access to the sensitive ends 140, 144 of sensors 124 and 126 in order to clean them, for example, using a brush.

[0114] Fig. 5 represents a siphon 160 identical to the siphon 80 except that the plunger 84 is replaced by a plunger 162. In Fig. 5, the sensors 124, 126 and the generator 150 have not been shown.

[0115] The plunger 162 performs the same function as the plunger 84. However, here, the plunger 162 is a simple vertical wall, and not a tube, which extends from the top of the fixed body 82 to the lower part 110. This vertical wall partitions the siphon 160 into an upstream compartment and a downstream compartment symmetrical to each other with respect to a vertical plane passing through the axis 113 and perpendicular to the axis 94.

[0116] Chapter III: Variants:

[0117] Variants of the analysis cell:

[0118] The analysis cell may include additional sensors such as, for example, a flow sensor. In this case, this additional sensor may also be attached to the siphon. For this purpose, by way of illustration, an additional nozzle is provided in the base 86 and the additional sensor is received in this additional nozzle.

[0119] Conversely, in a simplified embodiment, the temperature sensor can be omitted. In this latter case, the turbidity measurements of sensor 120 are not temperature compensated.

[0120] Alternatively, the sensor(s) are fixed to the fixed body 82 or the plunger instead of being fixed to the base 86. In this case, the removal of the base 86 and the removal of the sensors are not carried out simultaneously. In particular, the sensor(s) may be fixed to the lower part of the plunger 84 or 162.

[0121] The turbidity sensor 120 can also be fixed between the lower part 110 and the inlet of the tubing 92. For example, the sensor 124 is fixed on the upper end of the tube 112 of the plunger 84.

[0122] In a manner similar to what has just been described in the case of the sensors, the ultrasonic generator 150 can also be fixed on the fixed body 82 or the plunger instead of being fixed on the base 86.

[0123] Alternatively, the generator 150 is fixed to a side wall of the base 86 instead of being fixed to the bottom of the base.

[0124] In a simplified embodiment, the ultrasonic generator 150 is omitted. In this case, the sensitive ends of the sensors are, for example, cleaned with a brush when the base is removed.

[0125] Other embodiments of the siphon are possible. For example, the plunger can be fixed to the base instead of being fixed to the body. In this case, when The base is removed, and the plunger is also removed at the same time. The plunger can also be a separate part, distinct from the body 82 and the base 86.

[0126] In another embodiment, the lower end of the tube 112 is shaped so that the surface area S84 is 1.1 times, 1.5 times, or twice the area of ​​the cross-sections of the tubes 90, 92. This slows the flow of greywater into the tank 118, thereby reducing turbulence in front of the turbidity sensor 120. This improves the measurement accuracy of this sensor.

[0127] Other variants:

[0128] In some dwellings, the greywater outlet pipe is not located within a crawl space. For example, the greywater outlet pipe is fixed to an exterior wall of the dwelling. In this case, the analysis cell is not installed in a crawl space but outside the dwelling, like the outlet pipe.

[0129] The dwelling may include other sources of grey water such as, for example, a bathtub, several sinks and / or several showers. A dishwasher may also be a source of grey water. Generally, a dwelling includes at least two sources of grey water.

[0130] Alternatively, one, several or all of the grey water network 4 inlets are without an odor trap.

[0131] The dwelling may include other consumers of recycled greywater. For example, the dwelling includes an indoor tap that delivers greywater drawn from tank 48. The greywater delivered by this tap is, for example, reserved for certain domestic uses such as floor washing.

[0132] The greywater consumer(s) need not necessarily be part of the dwelling. For example, the greywater consumer could be a garden tap located outside the dwelling in a garden.

[0133] The grey water storage tank 48 is also not necessarily located inside the dwelling. It can also be located outside.

[0134] The recycling system may be shared by several dwellings. In this case, each dwelling is equipped with its own sorting equipment 42 to direct the greywater discharged from the dwelling either to the sewer system or to the same greywater recycling storage tank 48. Thus, in the case of a recycling system shared by several dwellings, the tank 48 is common to all these dwellings. Similarly, preferably, the filtration system 46 is also common to the different dwellings.

[0135] In a simplified variant, the filtration system 46 is omitted. In this case, the greywater consumers are directly supplied with unfiltered greywater.

[0136] A dwelling is not necessarily a house. For example, a dwelling can also be a mobile home, an apartment in a building, or other types of accommodation.

[0137] Several of the variants described above can be combined in the same embodiment.

[0138] Chapter IV: Advantages of the embodiments described:

[0139] The siphon, having an inlet pipe 90 and an outlet pipe 92 at the same height, is easy to install in a horizontal pipe. Furthermore, although its overall size is much smaller than that of a collection tank, it allows for precise measurement of the turbidity sensor 120. This is because the siphon's reservoir 118 is always completely filled with grey water, regardless of the grey water inflow rate. Therefore, by placing the sensitive end 140 of the turbidity sensor 120 in the lower section 110 or between this lower section 110 and the outlet pipe 92, its measurement is not, or is less, affected by the presence of air in the grey water. Thus, although the siphon has a limited volume, it is sufficient to guarantee accurate operation of the turbidity sensor 120. Furthermore, since the siphon volume is limited, the turbidity sensor more frequently measures the turbidity of grey water coming from a single grey water source.Conversely, the turbidity measured in a collection tank is more often an average turbidity of greywater from several different sources. Because of this difference, greywater treatment is more efficient using the siphon described here. It is also important to note that in the analysis cell, the siphon is not used to prevent foul odors from rising back up to the greywater network inlets. Indeed, siphons are almost always already located near each greywater source to perform this function. In this analysis cell, the siphon is used solely as a space-saving solution to remove as much air mixed with the greywater as possible at the point where the turbidity measurement is taken. Finally, using a siphon with a removable base facilitates maintenance of the analysis cell.Indeed, it is enough to disassemble the base to remove the dirt that can accumulate in the 118 reservoir.

[0140] The fact that one or more of the sensors are directly fixed on the base 86 also facilitates the maintenance of the analysis cell because, in a single operation, the operator detaches the base 86 from the fixed body 82 to remove dirt and also detaches the sensor(s) 124, 126 from the fixed body in order to have easy access to the immersed ends of this or these sensors.

[0141] Measuring the temperature of the grey water flowing into the siphon also makes it possible to compensate for the measurements of the turbidity sensor and thus to have more precise measurements.

Claims

1. Demands Accommodation includes: - several greywater sources (10, 12, 14) chosen from the group consisting of a washing machine, a shower, a bathtub and a sink, - toilets (30), - a grey water network (4) comprising a single horizontal grey water outlet pipe (26), this grey water network being connected to said several grey water sources and arranged to collect the grey water from these grey water sources in the horizontal outlet pipe, - a black water network (32), separate from the grey water network, which connects the toilets to the sewer system, - grey water sorting equipment (42) comprising: a) a set (62) of controllable solenoid valves capable of directing the grey water flowing in the grey water outlet pipe towards a fluidly recycled grey water storage tank connected to a grey water consumer and, alternately, towards the sewer system, b) a cell (60) for analyzing the turbidity of the grey water flowing in the grey water outlet pipe, this analysis cell comprising for this purpose a turbidity sensor, (c) a computer (64) programmed to determine the degree of dirtiness of the grey water flowing into the grey water outlet pipe from the turbidity measured by the turbidity sensor and to control, according to the determined degree of dirtiness, the set of solenoid valves to direct the grey water to the sewer system when the degree of dirtiness exceeds a predetermined threshold and, otherwise, to control the set of solenoid valves to direct the grey water to the recycled grey water tank, characterized in that the analysis cell (60) comprises a siphon (80; 160) installed in the grey water outlet pipe, this siphon comprising: - a fixed body (82) equipped with: — of an inlet pipe (90) fluidly connected to an upstream portion of the grey water outlet pipe and comprising an axis (94) of revolution, — an outlet pipe (92) fluidly connected to a downstream portion of the greywater outlet pipe and having an axis of revolution coinciding with the axis of revolution (94) of the inlet pipe, — a plunger (84; 162) interposed between the inlet and outlet pipes to force the greywater down to a lower part (110) of the siphon before rising back up to the outlet pipe, — a base (86) reversibly movable between a mounted position on the fixed body in which the base completely surrounds the lower part and forms, in combination with the fixed body, a greywater reservoir, and a dismounted position in which the base is detached from the fixed body, and — in which the turbidity sensor (124) is fixed, without any degree of freedom, to the siphon to measure the turbidity of the greywater in the lower part (110) of the siphon or between the lower and an inlet of the outlet pipe.

2. Housing according to claim 1, in which the housing includes a crawl space (29) in which the grey water outlet pipe (26) is housed and the analysis cell is installed in this crawl space.

3. Housing according to claim 2, wherein: - the analysis cell also includes a temperature sensor (126) capable of measuring the temperature of the grey water inside the siphon, and - the computer is programmed to correct the measurements of the turbidity sensor according to the measurements of this temperature sensor.

4. Housing according to any one of the preceding claims, wherein, for each source of grey water, the grey water network includes, at the point of connection of that source of grey water to the grey water network, an odor trap (20, 22, 24), this odor trap being separate from the siphon of the analysis cell.

5. Dwelling according to any one of the preceding claims, wherein the dwelling includes at least one greywater recycling consumer selected from the group consisting of a toilet flush (34) and an outdoor tap (36) for watering a garden.

6. Analysis cell for the construction of a dwelling conforming to any one of the preceding claims, wherein the analysis cell comprises a turbidity sensor (120), characterized in that the analysis cell comprises a siphon (80) suitable for installation in the grey water outlet pipe, this siphon comprising: - a fixed body (82) equipped with: — an inlet pipe (90) suitable for fluidly connecting to an upstream portion of the grey water outlet pipe and comprising an axis (94) of revolution, — an outlet pipe (92) suitable for fluidly connecting to a downstream portion of the grey water outlet pipe and comprising an axis of revolution coinciding with the axis of revolution of the inlet pipe, - a plunger (84;162) interposed between the inlet and outlet pipes to force grey water to descend to a lower part (110) of the siphon before rising back up to the outlet pipe, - a base (86) reversibly movable between a position mounted on the fixed body in which the base completely surrounds the lower part and forms, in combination with the fixed body, a grey water reservoir, and a disassembled position in which the base is detached from the fixed body, and in which the turbidity sensor is fixed, without any degree of freedom, on the siphon to measure the turbidity of grey water in the lower part of the siphon or between the lower part and the inlet of the outlet pipe.;

7. Cell according to claim 6, wherein the turbidity sensor (120) is fixed on the base (86).

8. Cell according to claim 7, wherein the cell also comprises a temperature sensor (124) fixed on the base.

9. Cell according to claim 8, wherein: - the turbidity sensor and the temperature sensor each have a sensitive end (140, 144) housed inside the base for immersion in the grey water tank of the siphon, and - the cell further comprises an ultrasonic generator (150) fixed on the base to emit ultrasound which cleans both the sensitive ends of the turbidity sensor and the temperature sensor.

10. Cell according to claim 9, wherein the base (86) has a bottom forming the lowest point of the siphon and the ultrasonic generator (150) is fixed to the bottom of the base.

11. Cell according to any one of claims 6 to 10, wherein the shortest distance between the axis (94) of revolution of the inlet tube and the lower part (110) of the siphon is greater than 10 cm.

12. Cell according to any one of claims 6 to 11, wherein the internal volume of the siphon is less than 5 liters.

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