Grey water recovery system for a sanitary installation of a vehicle and associated vehicle

Abstract

The present invention relates to a grey water recovery system (10), comprising: - an intermediate tank (16); - a grey water supply system (18) for the intermediate tank, including a supply valve (60); - a pressurization system (20) for the intermediate tank, including a pressurization valve (72); - a flush water distribution system (24) connecting the intermediate tank to a toilet bowl (36) and including a flush valve (88); - an air venting system (22) for the intermediate tank, including an air vent valve (80). The recovery system (10) is configured to control a flushing sequence (100), by controlling the pressurization system (20), the supply valve (60), the flush valve (88), and the air vent valve (80).

Description

[0001] The present invention relates to a grey water recovery system and an associated vehicle.

[0002] A sanitary installation mounted on a vehicle, particularly a railway, generally includes a washbasin supplied with clean water and a toilet equipped with a bowl supplied by a water source.

[0003] After each use, the sink releases wash water, also known as grey water. Since this water contains few pollutants, there are systems that allow the grey water to be reused for flushing the vehicle's toilet bowl.

[0004] The use of this type of system is particularly advantageous in vehicles, where they allow for a reduction in the consumption of clean water, thereby reducing the overall weight of the vehicle.

[0005] For example, document EP 2 873 583 A1 describes a water storage and distribution system comprising a greywater tank suitable for storing greywater discharged from the washbasin and transferring it to the toilet bowl for flushing. The toilet includes an intermediate tank, equipped with selective vacuum means, connected by an inlet valve to the bowl and by an outlet valve to a wastewater tank, in which blackwater, including waste products flushed from the bowl, is also stored.

[0006] However, this solution is costly in terms of equipment and space. The numerous tanks and pipes also make it complex to install in a vehicle, especially a rail vehicle.

[0007] One aim of the invention is therefore to offer a grey water recovery system that is less expensive in terms of equipment while operating just as efficiently and without the need for a water storage tank in the basin area.

[0008] In addition to this goal, it has been observed that, currently, if a sink is clogged, it is necessary to unclog it manually. However, such manual methods are unsatisfactory. Indeed, they require disassembling and reassembling the system's components, which creates a risk of leaks during reassembly.

[0009] A complementary or alternative purpose of the invention is therefore to facilitate maintenance activity in the event that the sink is blocked.

[0010] To this end, the invention relates to a grey water recovery system for a vehicle's sanitary installation, comprising: a washbasin comprising a grey water receiving basin, the grey water receiving basin having a water outlet; an intermediate tank comprising a grey water supply inlet, a grey water outlet, and a pneumatic pressure inlet; a system for supplying the intermediate tank with grey water from the washbasin, the supply system comprising a grey water pipe and a supply valve, the grey water pipe connecting the water outlet of the receiving basin to the grey water supply inlet of the intermediate tank; a pressurization system for the intermediate tank comprising a pressurization pipe and a pressurization valve, the pressurization pipe being connected to the pneumatic pressure inlet and suitable for connection to a compressed air source;a flushing water distribution system comprising a flushing water pipe and a flushing valve, the flushing water pipe being connected to the grey water outlet of the intermediate tank and being suitable for connection to at least one flush outlet of a toilet bowl;

[0011] The system is characterized in that the intermediate tank further comprises an air exhaust outlet, the recovery system also comprising an air exhaust system from the intermediate tank, the air exhaust system comprising an air exhaust duct and an air exhaust valve, the air exhaust duct being suitable for connecting the air exhaust outlet of the intermediate tank to atmospheric pressure, the recovery system further comprising a processing unit, the processing unit being configured to control the implementation of at least one flushing sequence, during which the processing unit controls at least the pressurization system, the supply valve, the flush valve and the air exhaust valve.

[0012] Thus, venting air at atmospheric pressure makes it easy to regulate the pressure within the intermediate tank while limiting the use of additional equipment such as an auxiliary tank.

[0013] In specific embodiments, the grey water recovery system includes one or more of the following features, taken individually or in all technically possible combinations: the supply valve, flush valve, pressurization valve and air vent valve are each respectively suitable for having at least one open configuration for fluid passage and one closed configuration for fluid passage, and, during the flushing sequence, the processing unit commands the supply valve and the air vent valve to move to the closed configuration, then the pressurization valve and the flush valve to the open configuration; the intermediate tank also includes a water level sensor suitable for measuring a water level in an internal storage volume of the intermediate tank, the processing unit being configured to command the implementation of said flushing sequence based on a water level measured by the water level sensor;the intermediate tank has a recharge water inlet and the recovery system also includes a system for recharging the intermediate tank with water, the recharge system including a recharge conduit and a recharge valve, the recharge conduit being connected to the recharge water inlet of the intermediate tank and suitable for connection to a recharge water source; and, during the flushing sequence, the treatment unit is configured to further control the recharge valve based on a water level measured by the water level sensor, to fill the intermediate tank if the water level measured by the water level sensor is below a predetermined minimum water level;the intermediate tank also includes a water level sensor to measure a water level in an internal storage volume of the intermediate tank, the supply system also includes a wastewater conduit connected to the intermediate tank and a waste valve, the treatment unit being configured to control the implementation of at least one emptying sequence of the intermediate tank, during which the treatment unit controls at least the pressurization system, the waste valve), the supply valve, the air vent valve and the flush valve, the emptying sequence being controlled according to a water level measured by the water level sensor;the supply valve, flush valve, pressurization valve, air vent valve and waste valve are each respectively suitable for having at least one open configuration for fluid passage and one closed configuration for fluid passage, and, during the emptying sequence, the treatment unit commands the switch to the closed configuration of the supply valve, flush valve and air vent valve, then the switch to the open configuration of the pressurization valve and waste valve; the treatment unit is configured to command the implementation of at least one unclogging sequence of the grey water conduit to the grey water receiving basin, during which the treatment unit commands at least the pressurization system, the supply valve, the flush valve and the air vent valve;The supply valve, flush valve, pressurization valve, and air vent valve are each respectively designed to have at least one open configuration for fluid flow and one closed configuration for fluid flow, and, during the unclogging sequence, the treatment unit commands the supply valve, flush valve, and air vent valve to switch to the closed configuration, then the pressurization valve to the open configuration, and then the supply valve to switch to the open configuration; the intermediate tank constitutes the sole water storage tank that is designed to supply the toilet bowl for a flushing sequence and / or in which the flushing water distribution system is free of an interposed tank and / or hydraulic pump.

[0014] The invention also relates to a vehicle, comprising a sanitary installation including a recovery system as described above, the vehicle further comprising a compressed air pneumatic line, the pressurization system being connected to the pneumatic line.

[0015] The invention will be better understood upon reading the following description, given solely by way of example and made with reference to the attached drawings, in which: [ Fig 1 ] there figure 1 is a schematic representation of a vehicle including an example of a grey water recovery system according to the invention; and [ Fig 2 ] there figure 2 corresponds to schematic flowcharts of the operating sequences of the recovery system of the figure 1 .

[0016] A vehicle 6 including a sanitary installation 8 is illustrated on the figure 1 .

[0017] Vehicle 6 is, for example, a railway vehicle. Alternatively, vehicle 6 is any type of vehicle suitable for including such a sanitary installation 8, for example, a ship, an aircraft, or a wheeled motor vehicle such as a bus.

[0018] The vehicle 6 preferably includes a compressed gas pneumatic line 9A. The pneumatic line 9A is typically suitable for supplying pneumatic consumers of the vehicle 6. Each pneumatic consumer is suitable for presenting an operating configuration, during which the pneumatic consumer consumes compressed gas to implement a function.

[0019] Vehicle 6 also preferably includes a 9B refill water source.

[0020] Advantageously, vehicle 6 includes a wastewater tank 9C intended to receive and store at least the black water produced during a journey of vehicle 6.

[0021] Sanitary facility 8 is dedicated to the discretion and privacy of the moment of voluntary relief of bodily waste by a passenger of vehicle 6, and to the personal hygiene, in particular of the hands, of the passenger.

[0022] To do this, the sanitary installation 8 delimits a space for a passenger of vehicle 6, which is suitable for being closed.

[0023] The sanitary installation 8 includes a grey water recovery system 10.

[0024] In what follows, the recovery system 10 is illustrated and described as being included in this sanitary installation 8. However, the invention also relates to the grey water recovery system 10 in isolation.

[0025] The grey water recovery system 10 includes a washbasin 12, an intermediate tank 16, a grey water supply system 18 from the intermediate tank 16, a pressurization system 20, an air evacuation system 22, and a flush water distribution system 24.

[0026] The recovery system 10 also preferably includes a toilet 14.

[0027] In a preferred embodiment of the invention, the recovery system 10 also includes a water refilling system 26 for the intermediate reservoir 16.

[0028] The recovery system 10 also includes a processing unit 28 capable of controlling different sequences and operating modes of the recovery system 10, as will be described in more detail later.

[0029] Washbasin 12 is intended for handwashing by a user of sanitary facility 8.

[0030] The washbasin 12 includes a tap 30 designed to allow the flow of water for handwashing. The tap 30 is specifically designed to allow and prevent the flow of water.

[0031] The washbasin 12 includes, for example, a control mechanism to operate the tap 30 and allow the water to flow. For example, operating the control mechanism allows the water to flow for a predetermined handwashing time. The volume of water flowing during the predetermined handwashing time is, for example, between 20 cl and 40 cl, for example, equal to 30 cl.

[0032] Washbasin 12 includes a grey water collection basin 32.

[0033] The grey water receiving basin 32 includes a water outlet 34.

[0034] The grey water receiving basin 32 preferably includes a basin, with the water outlet 34 for example located at the lowest point of the basin.

[0035] The water flowing from tap 30 is received in the grey water receiving basin 32, then is discharged through the water drain 34.

[0036] Washbasin 12 preferably also includes a technical unit supporting the grey water collection basin. The technical unit is closed to the user of the sanitary installation 8 but is designed to be opened by a technician.

[0037] Toilet 14 includes a toilet bowl 36 and at least one flush outlet 37.

[0038] The bowl 36 has a water drain 34.

[0039] The 36th basin is positioned at a distance from the technical unit.

[0040] Toilet 14 preferably includes at least two flush outlets 37, for example at least three flush outlets 37. Alternatively, toilet 14 includes only one flush outlet 37.

[0041] Toilet 14 preferably includes a control system 38 for triggering a flush by a user of the sanitary installation 8.

[0042] The user-operated control system 38 is configured to generate a signal to trigger a toilet flush upon activation. The control system 38 includes, for example, a control element that can be manually operated by the user. The control element is, for example, a button.

[0043] Toilet 14 also includes a drain pipe 40 and a drain valve 42.

[0044] The drain pipe 40 connects the bowl 36 to the waste water tank 9C of vehicle 6.

[0045] In particular, the drain pipe 40 connects the water outlet 34 of the bowl 36 to the waste water tank 9C of the vehicle 6.

[0046] The purge valve 42 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0047] Preferably, the purge valve 42 is a solenoid valve. Thus, switching from one configuration to another of the purge valve 42 can be controlled, for example, by the processing unit 28.

[0048] During a toilet flush, water is expelled from each flush outlet 37 into the bowl 36. The water is then evacuated from the bowl 36 through the drain pipe 40 to the wastewater tank 9C.

[0049] The intermediate reservoir 16 is intended to receive and store grey water from tap 30 of washbasin 12, in particular to supply the toilet bowl 36 with the stored water.

[0050] The intermediate tank 16 constitutes the only water storage tank which is suitable for supplying the toilet bowl 36 for a flush sequence 100.

[0051] The intermediate reservoir 16 is located under the sink 12, specifically under the receiving basin. "Location under" means that a vertical plane intersects both the receiving basin and the intermediate reservoir 16.

[0052] The intermediate tank 16 is, for example, located in the technical unit of the washbasin 12. This makes it possible to guarantee easy access to the single water tank intended for the flushing sequence 100.

[0053] In general, the intermediate tank 16 has a grey water supply inlet 44, a grey water outlet 46 and a pneumatic pressure inlet 48. The grey water supply inlet 44, the grey water outlet 46 and the pneumatic pressure inlet 48 are separate.

[0054] The intermediate tank 16 further includes an air vent outlet 50. The air vent outlet 50 is then separate from the grey water supply inlet 44, the grey water outlet 46 and the pneumatic pressure inlet 48.

[0055] Preferably, the intermediate tank 16 also includes a refill water inlet 52. The refill water inlet 52 is then, for example, separate from the grey water supply inlet 44. The refill water inlet 52 is separate from the grey water outlet 46, the pneumatic pressure inlet 48, and, where applicable, the air vent outlet 50.

[0056] The intermediate tank 16 includes walls delimiting an internal storage volume 54. The walls of the intermediate tank 16 include, for example, side walls, a bottom wall and a roof wall, the side walls connecting the bottom wall to the roof wall.

[0057] These walls delimit the different inlets and outlets of the intermediate tank 16.

[0058] The supply inlet 44 is, for example, located in one of the side walls. The grey water outlet 46 is, for example, located in the back wall. The pneumatic pressure inlet 48 is, for example, located in the roof wall. The air exhaust outlet 50 is, for example, located in the roof wall. The recharge water inlet 52 is, for example, located in one of the side walls.

[0059] These walls, for example, were made of material.

[0060] The internal storage volume 54 is preferably greater than 1.0 L, advantageously between 1.0 L and 5.0 L, for example between 2.0 L and 3.0 L.

[0061] Such an internal storage volume 54 allows for the waste of as little usable water as possible for flushing the toilet bowl 36. Indeed, such a volume allows for multiple uses of the sink 12, which makes it possible to avoid the use of the draining function which will be described later.

[0062] The intermediate reservoir 16 is thus distinguished from a simple conduit.

[0063] The intermediate tank 16 thus stores a mixture of fluids, including water and gas.

[0064] As will be described in more detail later, the intermediate tank 16 is adapted to build up pressure and eject fluid through the grey water outlet 46, during a flushing sequence for example, and / or through the supply inlet 44, during a draining sequence 110 or unclogging sequence 118 of the grey water conduit 58 for example.

[0065] The walls of the intermediate tank 16 are sufficiently rigid so as not to deform during such a pressure increase.

[0066] Preferably, the intermediate tank 16 also includes a water level sensor 56. The water level sensor 56 is suitable for measuring a water level in the internal storage volume 54 of the intermediate tank 16.

[0067] The water level sensor 56 is preferably suitable for continuously or at regular intervals measuring the water level in the internal storage volume 54 and for sending to the processing unit 28 information representative of the measured water level.

[0068] The supply system 18 allows the intermediate tank 16 to be supplied with grey water from the sink 12.

[0069] The supply system 18 includes a grey water conduit 58 and a supply valve 60.

[0070] The feed system 18 also preferably includes a waste valve 62.

[0071] As illustrated on the figure 1 , the grey water conduit 58 connects the receiving basin 32 to the intermediate reservoir 16.

[0072] The grey water pipe 58 thus allows the intermediate tank 16 to be supplied with water from the washbasin 12.

[0073] In particular, the grey water conduit 58 connects the water outlet 34 of the receiving basin 32 to the grey water supply inlet 44 of the intermediate reservoir 16.

[0074] In the example of implementation illustrated on the figure 1 , the grey water conduit 58 includes a main section 64 opening onto the water outlet 34 of the receiving basin and at least a first branch 66 opening into the grey water supply inlet 44 of the intermediate reservoir 16.

[0075] For example, the grey water pipe 58 further includes a second branch 68, separate from the first branch 66, which opens into the waste water tank 9C of the vehicle 6. The second branch 68 then corresponds to a waste water pipe 68.

[0076] The supply valve 60 is suitable for controlling the flow of water between the receiving basin and the intermediate reservoir 16.

[0077] The supply valve 60 is, for example, placed on the main section 64, as in the example of the figure 1 , or on the first branch 66.

[0078] The supply valve 60 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0079] Preferably, the supply valve 60 is a solenoid valve. Thus, switching from one configuration to another of the supply valve 60 can be controlled, for example, by the processing unit 28.

[0080] In the open configuration of the supply valve 60, clean water is able to flow in one direction from the receiving basin 32 to the intermediate tank 16 and / or in the other direction from the intermediate tank 16 to the receiving basin 32.

[0081] Thus, the supply valve 60 is not a non-return valve.

[0082] In the closed configuration of the supply valve 60, no liquid can pass through the supply valve 60 in either direction of flow.

[0083] The waste valve 62 is suitable for controlling the flow of water between the receiving basin 32 and the waste water tank 9C of the vehicle 6.

[0084] The waste valve 62 is separate from the feed valve 60.

[0085] The waste valve 62 is for example placed on the second branch 68.

[0086] The waste valve 62 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0087] Preferably, the waste valve 62 is a solenoid valve. Thus, switching from one configuration to another of the waste valve 62 can be controlled, for example, by the processing unit 28.

[0088] In the open configuration of the waste valve 62, clean water is able to flow in one direction from the receiving basin 32 to the wastewater tank 9C.

[0089] Thus, the waste valve 62 is not a non-return valve.

[0090] In the closed configuration of the waste valve 62, no liquid can pass through the waste valve 62 in either direction of flow.

[0091] In addition, the 62 waste valve in closed configuration prevents odor problems from rising from the wastewater tank 9C.

[0092] The pressurization system 20 is suitable for pressurizing the intermediate tank 16, for example in order to carry out a flushing sequence 100, and / or a draining sequence 110, and / or a clearing sequence 118 of the grey water pipe 58.

[0093] By "pressurize", we mean that the pressurization system is capable of increasing the pressure of the fluids contained in the intermediate tank 16.

[0094] The pressurization system 20 includes a pressurization conduit 70 and a pressurization valve 72.

[0095] The pressurization system 20 preferably also includes a pressure sensor 74 in the pressurization conduit 70. The pressure sensor 74 is, for example, a pressure gauge.

[0096] The pressurization system 20 also preferably includes a non-return valve 76, separate from the pressurization valve 72. The non-return valve 76 is, for example, located between the intermediate reservoir 16 and the pressurization valve 72. The non-return valve 76 prevents water from flowing back into the pressurization line 70.

[0097] As illustrated on the figure 1 , the pressurization duct 70 is suitable for connecting, and on the figure 1 connects the intermediate tank 16 to a source of compressed gas.

[0098] The compressed gas source includes, for example, the pneumatic compressed gas line 9A of vehicle 6.

[0099] Compressed gas is, for example, compressed air.

[0100] The pressurization line 70 thus allows the intermediate tank 16 to be supplied with compressed gas.

[0101] In particular, the pressurization line 70 connects the compressed gas source to the pneumatic pressure inlet 48 of the intermediate tank 16. The pressurization line 70 opens onto the pneumatic pressure inlet 48.

[0102] The pressurization valve 72 is, for example, placed on the pressurization line 70, as in the example of the figure 1 .

[0103] The pressurization valve 72 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0104] Preferably, the pressurization valve 72 is a solenoid valve. Thus, switching from one configuration to another of the pressurization valve 72 can be controlled, for example, by the processing unit 28.

[0105] In the open configuration of the pressurization valve 72, compressed gas is suitable for circulation in one direction from the compressed gas source to the intermediate reservoir 16.

[0106] Thus, the pressurization valve 72 is not a non-return valve.

[0107] In the closed configuration of the pressurization valve 72, no gas can pass through the pressurization valve 72 in either direction of flow.

[0108] The air evacuation system 22 is suitable for evacuating gas present in the intermediate tank 16, in particular gas present in the internal storage volume 54 of the intermediate tank 16.

[0109] The air exhaust system 22 includes an air exhaust duct 78 and an air exhaust valve 80.

[0110] The air exhaust duct 78 is suitable for connection, and on the figure 1 connects the intermediate reservoir 16 to atmospheric pressure.

[0111] In particular, the air exhaust duct 78 connects the air exhaust outlet 50 of the intermediate tank 16 to atmospheric pressure.

[0112] The air exhaust duct 78 opens into the air exhaust outlet 50.

[0113] The air vent valve 80 is, for example, placed on the air vent duct 78, as in the example of the figure 1 .

[0114] The air evacuation valve 80 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0115] Preferably, the air vent valve 80 is a solenoid valve. This allows switching between different configurations of the air vent valve 80, for example, via the processing unit 28.

[0116] In the open configuration of the air vent valve 80, gas is free to flow in one direction from the intermediate reservoir 16 towards atmospheric pressure.

[0117] Thus, the air vent valve 80 is not a non-return valve.

[0118] In the closed configuration of the air vent valve 80, no gas can pass through the air vent valve 80 in either direction of flow.

[0119] The water refill system 26 for the intermediate tank 16 includes a refill conduit 82 and a refill valve 84.

[0120] The charging conduit 82 is suitable for connection, and on the figure 1 connects the vehicle's 9B refill water source to the intermediate tank 16.

[0121] The charging conduit 82 thus allows the intermediate tank 16 to be supplied with water from the charging water source 9B.

[0122] In particular, the recharge conduit 82 connects the recharge water source 9B to the recharge water inlet 52 of the intermediate tank 16.

[0123] The charging conduit 82 opens into the charging water inlet 52.

[0124] The refill valve 84 is suitable for controlling the flow of water between the refill water source 9B and the intermediate reservoir 16.

[0125] The charging valve 84 is, for example, placed on the charging conduit 82, as in the example of the figure 1 .

[0126] The charging valve 84 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0127] Preferably, the charging valve 84 is a solenoid valve. Thus, switching from one configuration to another of the charging valve 84 can be controlled, for example, by the processing unit 28.

[0128] In the open configuration of the recharge valve 84, clean water is able to flow in one direction from the recharge water source 9B to the intermediate reservoir 16.

[0129] Thus, the 84 charging valve is not a non-return valve.

[0130] In the closed configuration of the refill valve 84, no liquid can pass through the refill valve 84 in either direction of flow.

[0131] The flush water distribution system 24 is designed to distribute flush water to the bowl 36 of the toilet 14.

[0132] The flush water distribution system 24 includes a flush water pipe 86 and a flush valve 88.

[0133] Preferably, the 24 flush water distribution system is free from an additional interposed tank and / or hydraulic pump.

[0134] The 86 flush water pipe is suitable for connection, and on the figure 1 connects the intermediate tank 16 to the toilet 14.

[0135] The flush water pipe 86 thus allows the toilet 14 to be supplied with water from the intermediate tank 16.

[0136] In particular, the flush water pipe 86 connects the grey water outlet 46 of the intermediate tank 16 to each flush outlet 37 of the toilet 14.

[0137] The flush water pipe 86 includes a common main section 90 and, for each flush outlet 37, a branch.

[0138] Each branch opens into the toilet flush outlet 37 associated with it.

[0139] The flush valve 88 is suitable for controlling the flow of water between the intermediate tank 16 and the toilet bowl 36 of the toilet 14.

[0140] The flush valve 88 is, for example, placed on the main section 90 of the flush water pipe 86, as in the example of the figure 1 .

[0141] The flush valve 88 is designed to have at least one open configuration for fluid passage and one closed configuration for fluid passage.

[0142] Preferably, the flush valve 88 is a solenoid valve. Thus, switching from one configuration to another of the flush valve 88 can be controlled, for example, by the processing unit 28.

[0143] In the open configuration of the flush valve 88, clean water is able to flow in one direction from the intermediate tank 16 to the bowl 36 of the toilet 14.

[0144] Thus, the 88 flush valve is not a non-return valve.

[0145] In the closed configuration of the flush valve 88, no liquid can pass through the flush valve 88 in either direction of flow.

[0146] The processing unit 28 includes, for example, a computer processing device operationally connected to a computer memory, for example, a digital signal processor (DSP), a microcontroller, a field-programmable gate array (FPGA) and / or a dedicated ASIC capable of performing various data processing operations and functions, in particular capable of performing at least the functions described later.

[0147] The computer processing system may include, for example, a single processor. Alternatively, the computer processing system may include several processors, which are located in the same geographical area, or are at least partially located in different geographical areas and are therefore able to communicate with each other.

[0148] Each instance of the term "memory" is understood to mean any computer memory, volatile or non-volatile, appropriate to the subject matter herein being disclosed, such as random access memory (RAM), read-only memory (ROM), or other electronic, optical, magnetic, or other computer-readable storage media on which the data and functions described herein are stored, for example.

[0149] Therefore, memory is a tangible storage medium where the data and functions described here are, for example, stored in a non-transient form.

[0150] The treatment unit 28 is connected to the supply system 18, the pressurization system 20, the flush water distribution system 24 and the air exhaust system 22.

[0151] More specifically, the processing unit 28 is designed to control the supply valve 60, the pressurization valve 72, the flushing valve 88 and the air evacuation valve 80.

[0152] The treatment unit 28 is also preferably connected to the charging system 26 and the water level sensor 56. More specifically, the treatment unit 28 is then suitable for controlling the charging valve 84.

[0153] The processing unit 28 is configured to control the implementation of different sequences 100, 110, 118 and operating modes detailed below and illustrated on the figure 2 .

[0154] The treatment unit 28 is designed to control the transition from the recovery system 10 to a nominal grey water supply mode for the intermediate tank 16.

[0155] This is the mode in which the recovery system 10 is controlled by default.

[0156] In nominal mode, the supply valve 60 and the air evacuation valve 80 are in the open configuration and the waste valve 62, the flush valve 88, the pressurization valve 72 and the recharge valve 84 are in the closed configuration.

[0157] During nominal mode, grey water from tap 30 of washbasin 12 is received and stored in the intermediate tank 16, as and when washbasin 12 is used by users of the sanitary installation 8. The evacuation of air from the intermediate tank 16, as it fills with grey water, is permitted by the air evacuation valve 80 in the open configuration.

[0158] Before and after the triggering of each sequence described below, the processing unit 28 positions the recovery system 10 in nominal mode by commanding the passage of said valves into their above configurations.

[0159] The processing unit 28 is configured to control the implementation of at least one flushing sequence 100 illustrated on the figure 2 .

[0160] The flush sequence 100 is intended to evacuate bodily waste into the bowl 36, specifically towards the wastewater tank 9C of the vehicle 6.

[0161] The flushing sequence 100 includes a triggering step 102, an emptying step 104 of the intermediate tank 16, and then, for example, a step 106 of returning to the nominal grey water supply mode.

[0162] In a preferred embodiment, the processing unit 28 is configured to control the implementation of the emptying of the intermediate tank 16 according to a water level in the intermediate tank 16 measured by the water level sensor 56. The flushing sequence 100 then includes, before the emptying 104, a step 108 of checking and refilling the water level in the intermediate tank 16.

[0163] The flushing sequence 100 is triggered for example when the processing unit 28 receives a flushing control signal provided by the control system 38 of the toilet 14, following the activation of the control system 38 by a user of the sanitary installation 8.

[0164] Upon receiving the trigger signal, the recovery system 10 is initially in its nominal grey water supply mode. The treatment unit 28 is configured to control the transition of the recovery system 10 from the nominal grey water supply mode of the intermediate tank 16 to the flushing sequence 100.

[0165] In the preferred embodiment, during check and recharge step 108, the processing unit 28 is configured to check and recharge a water level in the intermediate tank 16.

[0166] More specifically, the processing unit 28 is configured to acquire representative information of a water level in the intermediate tank 16, by the water level sensor 56.

[0167] Depending on the water level measured by the water level sensor 56, the treatment unit 28 is configured to control the recharge valve 84.

[0168] The processing unit 28 is configured to control the recharge valve 84 according to a water level measured by the water level sensor 56, to fill the intermediate tank 16 if the water level measured by the water level sensor 56 is below a predetermined minimum water level.

[0169] More specifically, the treatment unit 28 is configured to control the switching of the recharge valve 84 from the closed configuration to the open configuration if the water level measured by the water level sensor 56 is lower than the predetermined minimum water level.

[0170] The intermediate reservoir 16 is then supplied by the recharge water source 9B. During the water supply, when the water level measured by the water level sensor 56 passes at least above the predetermined minimum water level, the treatment unit 28 commands the recharge valve 84 to switch to the closed configuration.

[0171] During the water supply phase of the recharge stage, the treatment unit 28 preferentially controls the switching of the air vent valve 80 to the open position. When the water level measured by the water level sensor 56 is greater than or equal to the predetermined minimum water level, the treatment unit 28 controls the switching of the air vent valve 80 to the closed position.

[0172] During the emptying step 104 of the intermediate tank 16, the processing unit 28 controls the pressurization system 20, the supply valve 60, the flushing valve 88 and the air evacuation valve 80.

[0173] During the emptying step 104, the processing unit 28 is configured to control the switch from the supply valve 60 and the air evacuation valve 80 to the closed configuration, and then the switch from the pressurization valve 72 and the flushing valve 88 to the open configuration.

[0174] During the emptying step 104, grey water from tap 30 of washbasin 12 can no longer supply the intermediate tank 16 thanks to the closed configuration of the supply valve 60. In addition, the intermediate tank 16 is airtight thanks to the closed configuration of the air vent valve 80.

[0175] Preferably, the processing unit 28 controls the switch from the closed to the open configuration of the flush valve 88 after a minimum pressure rise time in the intermediate tank 16, measured from the switch of the pressurization valve 72 to the open configuration. This minimum time is, for example, predetermined and stored in the memory of the processing unit 28.

[0176] The water contained in the intermediate reservoir 16 then flows through the flush valve 88, through the flush water pipe 86, to each flush outlet 37, and then into the toilet bowl 36.

[0177] Subsequently, the treatment unit 28 is configured to control a return to the nominal grey water supply mode. More specifically, the treatment unit 28 is configured to control the pressurization valve 72 and the flush valve 88 to the closed position, and then the supply valve 60 and the air vent valve 80 to the open position.

[0178] The return to the nominal grey water supply mode 106 is, for example, triggered after a minimum emptying time of the intermediate tank 16, measured from the moment the flush valve 88 switches to the open position. Alternatively, the return to the nominal grey water supply mode is triggered, for example, after the water level in the intermediate tank 16, measured by the water level sensor 56, reaches a predetermined emptying end level.

[0179] The processing unit 28 is preferably configured to control a draining sequence 110 of the intermediate tank 16, illustrated in the figure 2 , during which the processing unit 28 controls the pressurization system 20, the waste valve 62, the supply valve 60, the air evacuation valve 80 and the flush valve 88.

[0180] The drainage sequence 110 includes a triggering step 112, a drainage step 114 of the intermediate tank 16, and then, for example, a step 116 of returning to the nominal grey water supply mode.

[0181] The drainage sequence 110 is triggered, for example, based on a water level measured in the intermediate tank 16 by the water level sensor 56.

[0182] The 110 drainage sequence is triggered, for example, if the measured water level is above a maximum permitted level.

[0183] This maximum permitted level corresponds in particular to a water level beyond which the intermediate tank 16 could no longer receive and store water from the sink 12.

[0184] This maximum permitted level corresponds even more precisely to a water level beyond which the intermediate reservoir 16 could no longer receive and store the water flowing during the predetermined hand-washing time following the activation of the control device of the washbasin 12.

[0185] The treatment unit 28 is configured to control the transition of the recovery system 10 from the nominal grey water supply mode of the intermediate tank 16 to the emptying sequence 110.

[0186] During the emptying step 114, the processing unit 28 is configured to control the switch to the closed configuration of the supply valve 60, the flush valve 88 and the air evacuation valve 80, and then the switch to the open configuration of the pressurization valve 72 and the waste valve 62.

[0187] Preferably, the processing unit 28 controls the switch from the closed to the open configuration of the waste valve 62 after a minimum pressure rise time in the intermediate tank 16, measured from the switch of the pressurization valve 72 to the open configuration. This minimum time is, for example, predetermined and stored in the memory of the processing unit 28.

[0188] The water contained in the intermediate tank 16 then flows through the waste valve 62, through the wastewater pipe 68, and then into the wastewater tank 9C.

[0189] Subsequently, the treatment unit 28 is configured to control the return 116 to the nominal grey water supply mode. More specifically, the treatment unit 28 is configured to control the pressurization valve 72 and the waste valve 62 to the closed configuration, and then the supply valve 60 and the air vent valve 80 to the open configuration.

[0190] The return to the nominal grey water supply mode 116 is, for example, triggered after a minimum emptying time of the intermediate tank 16, measured from the moment the waste valve 62 switches to the open position. Alternatively, the return to the nominal grey water supply mode is triggered, for example, after the water level in the intermediate tank 16, measured by the water level sensor 56, reaches a predetermined end-of-emptying level.

[0191] The treatment unit 28 is preferably configured to also control a unblocking sequence 118 of the grey water conduit 58 to the grey water receiving basin 32, illustrated on the figure 2 .

[0192] Unblocking sequence 118 is intended to unblock sink 12 or grey water pipe 58.

[0193] The unblocking sequence 118 includes a triggering step 120, an expulsion step 122, and then, for example, a step 124 of returning to the nominal grey water supply mode.

[0194] To achieve this, the recovery system 10 preferably also includes a drain clearing control system 92. The drain clearing control system 92 is user-operable and configured to generate a trigger signal for drain clearing upon activation. The control system 92 includes, for example, a control element that can be manually operated by the user. The control element is, for example, a button.

[0195] The unblocking sequence 118 is triggered for example when the processing unit 28 receives a command signal to trigger unblocking provided by the unblocking control system 92, following its activation by a user of the sanitary installation 8.

[0196] The processing unit 28 is configured to control the transition of the recovery system 10 from nominal mode to the unclogging sequence 118.

[0197] During the expulsion stage 122, the processing unit 28 is configured to control the pressurization system 20, the supply valve 60, the flush valve 88 and the air evacuation valve 80.

[0198] The expulsion step 122 includes at least one expulsion cycle comprising a pressure build-up and an air evacuation through the supply valve 60.

[0199] Preferably, the expulsion step 122 includes the repetition of a predetermined number of such an expulsion cycle, the predetermined number advantageously being greater than or equal to two.

[0200] During pressure build-up, the processing unit 28 is configured to control the switch to the closed configuration of the supply valve 60, the flush valve 88 and the air evacuation valve 80; then, during air evacuation, the processing unit 28 is configured to control the switch to the open configuration of the pressurization valve 72, then the switch to the open configuration of the supply valve 60.

[0201] Preferably, the processing unit 28 controls the switch from the closed to the open configuration of the supply valve 60 after a minimum pressure rise time in the intermediate tank 16, measured from the switch of the pressurization valve 72 to the open configuration. This minimum time is, for example, predetermined and stored in the memory of the processing unit 28.

[0202] In particular, the grey water line 58 receives pressurized fluid from the intermediate tank 16, which facilitates maintenance by an operator. A blockage would thus emerge through the water outlet 34 of the receiving basin and be removed by the operator.

[0203] Therefore, it is not necessary to manually disassemble any of the system's components. This reduces the risk of leaks in the system, as clearing the blockage no longer requires reassembly.

[0204] Each expulsion cycle subsequently includes the switch of the supply valve 60 to the closed configuration, before a new expulsion cycle.

[0205] Subsequently, the treatment unit 28 is configured to control the return 124 to the nominal grey water supply mode. More specifically, the treatment unit 28 is configured to control the pressurization valve 72 and the waste valve 62 to the closed configuration, and then the supply valve 60 and the air vent valve 80 to the open configuration.

[0206] The return 124 to the nominal grey water supply mode is, for example, controlled at the end of the last expulsion cycle of the repetition.

[0207] Alternatively or in addition, the intermediate tank 16 can be refilled with water by controlling the tap 30 of the washbasin 12. In this case, the water refilling system 26 for the intermediate tank 16 also includes the grey water supply system 18 for the intermediate tank 16, which is supplied from the washbasin. Furthermore, the water refilling system 26 includes the tap 30, and the treatment unit 28 is then configured to control the tap 30 to allow water to flow from it.

[0208] In another variant, the recovery system 10 is devoid of a waste valve 62, the emptying sequence 110 is then controlled at least by the passage of the flush valve 88 to the open configuration.

[0209] The method of use and the advantages of the 10 recovery system result directly from the above.

[0210] The recovery system 10 is reliable, notably by limiting the number of components, for example no additional tank is present in the flush water pipe 86 and no pump is present to cause the flow of water to the bowl 36. Simpler maintenance is thus ensured while offering a water recovery system from the sink 12, which makes it possible to recover the grey water from the sink 12 to limit the use of water within the vehicle 6.

[0211] The presence of the air exhaust duct 78 allows the intermediate tank 16 to be depressurized.

[0212] The large capacity of the intermediate tank 16 allows the wastewater from several hand washes to be recovered and stored before a flushing sequence 110 has to be operated, thus limiting the loss of usable water for a flushing sequence 100.

[0213] The presence of the water sensor ensures proper operation at all times of the recovery system 10 by emptying the intermediate tank 16 if it is too full and filling it with water from the water source if there is not enough water for a unblocking sequence 118 and / or a flushing sequence 100.

Claims

1. Grey water recovery system (10) for a sanitary installation (8) of a vehicle (6), comprising: - a washbasin (12) including a grey water receiving basin (32), the grey water receiving basin (32) including a water outlet (34); - an intermediate tank (16) including a grey water supply inlet (44), a grey water outlet (46), and a pneumatic pressure inlet (48); - a grey water supply system (18) to the intermediate tank (16) from the washbasin, the supply system (18) including a grey water conduit (58) and a supply valve (60), the grey water conduit (58) connecting the water outlet (34) of the receiving basin to the grey water supply inlet (44) of the intermediate tank (16);- a pressurization system (20) for the intermediate tank (16) comprising a pressurization line (70) and a pressurization valve (72), the pressurization line (70) being connected to the pneumatic pressure inlet (48) and suitable for connection to a compressed air source; - a flush water distribution system (24) comprising a flush water line (86) and a flush valve (88), the flush water line (86) being connected to the grey water outlet (46) of the intermediate tank (16) and suitable for connection to at least one flush outlet (37) of a toilet bowl (36); characterized in thatthe intermediate tank (16) further includes an air vent outlet (50), the recovery system (10) also includes an air vent system (22) from the intermediate tank (16), the air vent system (22) including an air vent duct (78) and an air vent valve (80), the air vent duct (78) being suitable for connecting the air vent outlet (50) of the intermediate tank (16) to atmospheric pressure, the recovery system (10) further includes a processing unit (28), the processing unit (28) being configured to control the implementation of at least one flushing sequence (100), during which the processing unit (28) controls at least the pressurization system (20), the supply valve (60), the flush valve (88) and the air vent valve (80).

2. Recovery system (10) according to claim 1, wherein the supply valve (60), flush valve (88), pressurization valve (72) and air vent valve (80) are each respectively suitable for having at least one open configuration for fluid passage and one closed configuration for fluid passage, and, during the flush sequence (100), the processing unit (28) commands the supply valve (60) and the air vent valve (80) to switch to the closed configuration, and then the pressurization valve (72) and the flush valve (88) to switch to the open configuration.

3. Recovery system (10) according to claim 1 or 2, wherein the intermediate tank (16) also includes a water level sensor (56) suitable for measuring a water level in an internal storage volume (54) of the intermediate tank (16), the processing unit (28) being configured to control the implementation of said flushing sequence (100) as a function of a water level measured by the water level sensor (56).

4. Recovery system (10) according to claim 3, wherein the intermediate tank (16) has a refill water inlet (52) and the recovery system (10) also includes a refill system (26) for refilling water from the intermediate tank (16), the refill system (26) comprising a refill conduit (82) and a refill valve (84), the refill conduit (82) being connected to the refill water inlet (52) of the intermediate tank (16) and suitable for being connected to a refill water source (9B); and, during the flushing sequence (100), the treatment unit (28) is configured to further control the refill valve (84) according to a water level measured by the water level sensor (56), to fill the intermediate tank (16) if the water level measured by the water level sensor (56) is less than a predetermined minimum water level.

5. Recovery system (10) according to any one of claims 1 to 4, wherein the intermediate tank (16) also comprises a water level sensor (56) adapted to measure a water level in an internal storage volume (54) of the intermediate tank (16), the supply system (18) also comprises a wastewater conduit (68) connected to the intermediate tank (16) and a waste valve (62), the treatment unit (28) being configured to control the implementation of at least one emptying sequence (110) of the intermediate tank (16), during which the treatment unit (28) controls at least the pressurization system (20), the waste valve (62), the supply valve (60), the air vent valve (80) and the flush valve (88), the emptying sequence (110) being controlled according to a water level measured by the water level sensor. (56).

6. Recovery system (10) according to claim 5, wherein the supply valve (60), flush valve (88), pressurization valve (72), air vent valve (80) and waste valve (62) are each respectively adapted to have at least one open configuration for fluid passage and one closed configuration for fluid passage, and, during the emptying sequence (110), the processing unit (28) commands the switch to the closed configuration of the supply valve (60), the flush valve (88) and the air vent valve (80), and then the switch to the open configuration of the pressurization valve (72) and the waste valve (62).

7. Recovery system (10) according to any one of the preceding claims, wherein the treatment unit (28) is configured to control the implementation of at least one unclogging sequence (118) of the grey water conduit (58) to the grey water receiving basin (32), during which the treatment unit (28) controls at least the pressurization system (20), the supply valve (60), the flush valve (88) and the air evacuation valve (80).

8. Recovery system (10) according to claim 7, wherein the supply valve (60), flush valve (88), pressurization valve (72) and air vent valve (80) are each respectively adapted to have at least one open configuration for fluid passage and one closed configuration for fluid passage, and, during the unclogging sequence (118), the processing unit (28) commands the switch to the closed configuration of the supply valve (60), the flush valve (88) and the air vent valve (80), then the switch to the open configuration of the pressurization valve (72), then the switch to the open configuration of the supply valve (60).

9. Recovery system (10) according to any one of the preceding claims, wherein the intermediate tank (16) constitutes the sole water storage tank which is suitable for supplying the toilet bowl (36) for a flushing sequence (100) and / or wherein the flushing water distribution system (24) is devoid of an interposed tank and / or hydraulic pump.

10. Vehicle (6), comprising a sanitary installation (8) including a recovery system (10) according to any one of the preceding claims, the vehicle (6) further comprising a pneumatic line (9A) of compressed air, the pressurization system (20) being connected to the pneumatic line (9A).

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