Cleaning device for waste water tank of aircraft

Abstract

The utility model relates to a cleaning device for a waste water tank of an aircraft, which is used for cleaning the waste water tank of the aircraft, and comprises a flushing assembly, a cleaning assembly and a cleaning assembly, and the flushing assembly comprises a flushing pipeline and is used for supplying cleaning liquid to the inside of the waste water tank; the discharging assembly comprises a discharging pipeline and is used for discharging the flushing fluid in the waste water tank to the outside; the ultrasonic cleaning assembly comprises an ultrasonic transducer attached to the shell of the waste water tank and an ultrasonic generator electrically connected to the ultrasonic transducer, and the ultrasonic transducer enables cleaning liquid contained in the waste water tank to vibrate through the shell, so that ultrasonic cleaning of the waste water tank is achieved; and a cleaning / discharging selector, the cleaning / discharging selector comprises a cleaning gear, and in the cleaning gear, a cleaning operation is allowed to be performed on the waste water tank. The cleaning device can reduce scale deposit in the waste water tank, maintain the available volume of the waste water tank, improve the working environment of maintenance personnel and protect the physical and psychological health of the aircraft maintenance personnel.

Description

Technical Field

[0001] The utility model belongs to the field of aviation technology, and relates to a cleaning device for an aircraft waste water tank, in particular to an ultrasonic automatic cleaning system for a waste water tank, which belongs to the waste water tank flushing function of a waste water treatment subsystem in a waste water system of a civil aircraft. Background Art

[0002] Civil aircraft such as commercial airliners usually include a wastewater tank, which is mainly used to collect and store wastewater generated by people on board. The composition of wastewater entering the wastewater tank is relatively complex. For example, it may usually include human excrement, gray water from toilet washing, kitchen washing water, residual beverages in the kitchen, etc., which leads to a poor environment inside the wastewater tank. Usually, in the wastewater service procedure, after the wastewater in the wastewater tank is discharged, it is necessary to connect external clean water through a flushing pipeline and a flushing nozzle to clean the internal wall of the wastewater tank. Although the wastewater tank flushing rotary nozzle has the characteristics of a large coverage area, it inevitably has a flushing dead angle, and the scale in the wastewater tank cannot be effectively cleaned. In this way, as the aircraft operation time increases, bacteria may grow in the wastewater tank, resulting in a gradually poor working environment for aircraft maintenance personnel, which is not conducive to the physical and mental health of maintenance personnel.

[0003] Therefore, there is still a need to optimize the cleaning device of the waste water tank in the prior art, so as to provide an improved cleaning device for the aircraft waste water tank, which can overcome one or more disadvantages existing in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a cleaning device for an aircraft wastewater tank, which can effectively clean wall dirt, reduce scale accumulation inside the wastewater tank, maintain the available volume of the wastewater tank, and at the same time improve the onboard working environment of aircraft maintenance personnel, avoid bacterial growth in flushing dead corners, and protect the physical and mental health of aircraft maintenance personnel.

[0005] Another object of the utility model is to provide a cleaning device for an aircraft waste water tank, which can realize automatic cleaning, is easy to operate automatically, has high cleaning efficiency, does not require the participation of maintenance personnel, and improves the working environment of aircraft maintenance personnel.

[0006] According to one aspect of the utility model, a cleaning device for an aircraft wastewater tank is proposed, which is used for cleaning the aircraft wastewater tank and may include: a flushing component, which may include a flushing pipeline for supplying cleaning liquid to the inside of the wastewater tank; a discharge component, which may include a discharge pipeline for discharging the flushing liquid inside the wastewater tank to the outside of the wastewater tank; wherein the cleaning device for the aircraft wastewater tank may also include: an ultrasonic cleaning component, which includes an ultrasonic transducer attached to the shell of the wastewater tank and an ultrasonic generator electrically connected to the ultrasonic transducer, wherein the ultrasonic transducer causes the cleaning liquid contained in the wastewater tank to vibrate via the shell, thereby realizing ultrasonic cleaning of the wastewater tank; and a cleaning / draining selector, which includes a cleaning gear, wherein in the cleaning gear of the cleaning / draining selector, a cleaning operation of the wastewater tank is allowed.

[0007] The cleaning device can be used to clean the wastewater tank of an aircraft, and in addition to being able to achieve normal dirt washing, it can use the ultrasonic cleaning component to reduce the scale inside the wastewater tank, maintain the available volume of the wastewater tank, and improve the onboard working environment of aircraft maintenance personnel, avoid the breeding of bacteria in the dead corners of washing, and protect the physical and mental health of aircraft maintenance personnel. In addition, by selecting the gear position of the washing / draining selector, the wastewater tank can be washed more reliably and misoperation can be avoided.

[0008] According to the above aspects of the utility model, preferably, the ultrasonic cleaning component may also include a vibration plate, which cooperates with the ultrasonic transducer to vibrate the cleaning liquid contained in the wastewater tank.

[0009] In this way, the vibration of the ultrasonic transducer can cause corresponding vibration of the vibration plate, and then transmit the vibration to the cleaning liquid, which can better improve the ultrasonic cleaning effect, especially when the shell of the wastewater tank is made of non-metallic materials, for example, when the shell of the wastewater tank is made of non-metallic materials such as carbon fiber or silicone rubber.

[0010] According to the above aspects of the present invention, preferably, in order to perform a deeper cleaning on the waste water tank, the ultrasonic transducers can be arranged symmetrically with respect to the waste water tank.

[0011] According to the above aspects of the present invention, preferably, in order to achieve a better ultrasonic cleaning effect, the ultrasonic transducers may include four, and may be arranged symmetrically about the transverse axis and the longitudinal axis of the wastewater tank.

[0012] According to the above aspects of the utility model, preferably, in order to control the inflow and discharge of flushing liquid according to the actual flushing process to achieve a better flushing effect, the flushing component may also include a flushing valve arranged on the flushing pipeline, and the discharge component may also include a discharge valve arranged on the discharge pipeline.

[0013] According to the above aspects of the utility model, preferably, the cleaning / draining selector may further include a discharge gear and a working gear, in which the flushing valve is closed and the drain valve is opened; and wherein, in the working gear, the flushing valve is closed and the drain valve is closed.

[0014] In this way, the flushing mode of the wastewater tank can be distinguished from the normal wastewater discharge mode and the working mode when the aircraft is in operation, thereby avoiding misoperation and better protecting the physical and mental health of aircraft maintenance personnel.

[0015] According to the above aspects of the utility model, preferably, in order to realize automatic cleaning of the wastewater tank and improve the flushing efficiency, the cleaning device for the aircraft wastewater tank may also include a controller, which can be connected to the flushing valve, the drain valve and the wash / drain selector to control the opening or closing of the flushing valve and the drain valve based on the gear position of the wash / drain selector.

[0016] According to the above aspects of the utility model, preferably, in order to better realize the automatic cleaning of the wastewater tank and achieve the desired cleaning effect, the cleaning device for the aircraft wastewater tank may also include a sensor connected to the controller, the sensor can sense the liquid level of the flushing liquid inside the wastewater tank and / or the turbidity of the flushing liquid discharged through the discharge pipeline, and the controller can control the operation of the flushing valve and the discharge valve based on the signal from the sensor.

[0017] According to the above aspects of the utility model, in order to better flush the dirt on the inner wall of the wastewater tank, preferably, the flushing assembly can also include a flushing nozzle, which is arranged in the wastewater tank and is fluidically connected to the flushing pipeline.

[0018] According to the above aspects of the utility model, in order to further improve the cleaning efficiency and minimize the impact on the surrounding environment, preferably, the flushing pipeline connects the wastewater tank fluid to an external clean water truck, and the discharge pipeline connects the wastewater tank fluid to an external sewage truck.

[0019] According to the above aspects of the utility model, preferably, the cross-section of the discharge pipeline can be larger than the cross-section of the flushing pipeline to achieve faster wastewater discharge and avoid dirt clogging the discharge pipeline.

[0020] The cleaning device for aircraft waste water tanks according to the utility model optimizes the existing civil aircraft waste water tank flushing device and has the advantages of high cleaning efficiency, convenient maintenance of the available volume of the waste water tank, automated operation, no need for maintenance personnel participation, and improved working environment for aircraft maintenance personnel.

[0021] Therefore, the cleaning device for an aircraft waste water tank of the utility model can meet the use requirements, overcome the shortcomings of the prior art and achieve the predetermined purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to further clearly describe the cleaning device for aircraft waste water tank according to the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. In the accompanying drawings:

[0023] Figure 1 A schematic diagram of a cleaning device for an aircraft waste water tank according to a non-limiting embodiment of the present utility model is shown;

[0024] Figure 2 A schematic diagram showing a cleaning device for an aircraft waste water tank according to a non-limiting embodiment of the present utility model is shown;

[0025] Figure 3 A schematic control architecture diagram of a cleaning device for an aircraft waste water tank according to a non-limiting embodiment of the present invention is shown; and

[0026] Figure 4 A schematic control logic diagram of a cleaning device for an aircraft waste water tank according to a non-limiting embodiment of the present invention is shown.

[0027] The above drawings are merely schematic and are not drawn strictly to scale.

[0028] List of reference numerals in the figures and embodiments:

[0029] 100- A cleaning device for an aircraft waste water tank, comprising:

[0030] 10- Flushing assembly, including:

[0031] 11-Flush the pipeline;

[0032] 12-Flush valve;

[0033] 13- Rinse the nozzle;

[0034] 14-Flushing joint;

[0035] 20-Emission assembly, including:

[0036] 21- discharge pipe;

[0037] 22-discharge valve;

[0038] 23- discharge connector;

[0039] 30-Ultrasonic cleaning assembly, including:

[0040] 31-ultrasonic transducer;

[0041] 32-ultrasonic generator;

[0042] 33-vibration plate;

[0043] 34-cable;

[0044] 40-Purge / drain selector;

[0045] 50-controller;

[0046] 50A-Controller Area Network bus;

[0047] 60-Sensor;

[0048] 61-Liquid level sensor;

[0049] 62- turbidity sensor;

[0050] 200-wastewater tank;

[0051] 201- water tank entrance;

[0052] 202-vacuum ventilation pipeline;

[0053] 203-water-gas separator;

[0054] 204 - discharge opening;

[0055] X-transverse axis;

[0056] Y - longitudinal axis;

[0057] Z - vertical axis. DETAILED DESCRIPTION

[0058] It should be understood that, unless explicitly stated otherwise, the present invention may adopt various alternative orientations and step sequences. It should also be understood that the specific devices shown in the drawings and described in the specification are merely exemplary embodiments of the utility model concepts disclosed and defined herein. Therefore, unless otherwise explicitly stated, the specific orientations, directions or other physical features involved in the various embodiments disclosed should not be considered as limitations.

[0059] Figure 1 A schematic principle diagram of a cleaning device 100 for an aircraft waste water tank according to a non-limiting embodiment of the present invention is shown.

[0060] As an example and Figure 1As shown, the cleaning device 100 for aircraft wastewater tank may mainly include: a flushing component 10, a discharge component 20, an ultrasonic cleaning component 30 and a cleaning / discharge selector 40, as well as an optional controller 50 and a sensor 60, etc. These components may be directly or indirectly connected to the wastewater tank 200, such as Figure 1 As schematically shown in FIG. 1 , a desired cleaning operation is achieved.

[0061] Figure 2 A schematic diagram of a cleaning device 100 for an aircraft waste water tank according to a non-limiting embodiment of the present invention is shown. Figure 2 The dotted lines in the figure indicate that there is an electrical connection relationship between the components connected to each other, for example, there may be transmission or transfer of control data and / or sensing data.

[0062] As shown and as a non-limiting example, the cleaning device 100 for an aircraft wastewater tank may be used to clean a wastewater tank 200 of an aircraft.

[0063] As an example, the wastewater tank 200 may have a generally can-shaped shape with two end caps and a generally cylindrical tank body. The tank body of the wastewater tank 200 may include a multi-layer structure, for example, a three-layer structure consisting of an inner liner, an outer shell, and an intermediate filling layer therebetween. The inner liner of the tank body of the wastewater tank 200 may be made of a composite material, such as carbon fiber or silicone rubber, the outer shell of the wastewater tank 200 may be made of a metal material or a composite material, and the intermediate filling layer of the wastewater tank 200 may include a foam material, such as a porous foam. In addition, the end caps of the wastewater tank 200 may generally be made of metal, such as stainless steel.

[0064] like Figure 2 As shown in FIG. 2 , a water tank inlet 201 may be provided at the top of the wastewater tank 200, and the water tank inlet 201 allows wastewater to enter the internal volume of the wastewater tank 200. In addition, the wastewater tank 200 used on the aircraft is usually a vacuum type, and for this reason, a vacuum ventilation pipeline 202 and a water-gas separator 203 may also be provided at the top of the wastewater tank 200 to evacuate the wastewater tank 200 so as to suck the wastewater into the wastewater tank 200 by means of pressure difference. A discharge opening 204 may be provided at the bottom of the wastewater tank 200 to allow the wastewater to be discharged.

[0065] As shown in the figure, the flushing assembly 10 may include a flushing pipeline 11, a flushing valve 12, a flushing nozzle 13 and a flushing joint 14. The flushing pipeline 11 may be used to supply cleaning liquid to the inside of the wastewater tank 200, for example, to the flushing nozzle 13 disposed in the wastewater tank 200. The flushing nozzle 13 may be disposed in the upper portion of the wastewater tank 200.

[0066] As an example, a plurality of flushing nozzles 13 may be provided, and these flushing nozzles 13 may be arranged in different positions or orientations. As a preferred embodiment, the flushing nozzles 13 are rotatable, thereby allowing different parts of the interior of the wastewater tank 200 to be flushed.

[0067] The flushing valve 12 may be disposed on the flushing pipeline 11 and upstream of the flushing nozzle 13 to control the flow rate of the flushing liquid (eg, clean cleaning liquid) flowing into the flushing nozzle 13. As an example, the flushing valve 12 may be a variable flow valve and may be an electrically controlled valve.

[0068] A flush connection 14 may be disposed upstream of the flush valve 12 and may fluidly connect the waste water tank 200 to an external clean water truck.

[0069] Continue as Figure 2 As shown, the discharge assembly 20 may include components such as a discharge pipeline 21 , a discharge valve 22 , and a discharge connector 23 .

[0070] The discharge line 21 may be used to discharge the flushing liquid inside the wastewater tank 200 to the outside of the wastewater tank 200. For example, the discharge line 21 may be connected to a discharge opening 204 provided at the bottom of the wastewater tank 200. The flush valve 12 may be provided downstream of the discharge opening 204 to control the flow rate of the flushing liquid (e.g., cleaning liquid containing dirt) flowing out of the discharge opening 204. As an example, the discharge valve 22 may also be a variable flow valve, and may be an electrically controlled valve.

[0071] A discharge connection 23 may be provided downstream of the discharge valve 22 and may be used to fluidly connect the wastewater tank 200 to an external sewage truck.

[0072] As a preferred embodiment and as Figure 2 As schematically shown in FIG. 1 , the cross section of the discharge line 21 can be larger than the cross section of the flushing line 11 .

[0073] In order to achieve deep cleaning of the wastewater tank 200, the cleaning device 100 according to the present invention may include an ultrasonic cleaning assembly 30. The ultrasonic cleaning assembly 30 may include an ultrasonic transducer 31 attached to the housing of the wastewater tank 200 and an ultrasonic generator 32 electrically connected to the ultrasonic transducer 31.

[0074] The ultrasonic transducer 31 can realize the conversion of acoustic energy and electric energy, and may be, for example, a magnetostrictive transducer or a piezoelectric transducer.

[0075] A piezoelectric transducer (or piezoelectric ultrasonic transducer) can generally be composed of materials such as piezoelectric ceramics, elastomers and metals, among which the piezoelectric ceramics are used as electroacoustic conversion devices to convert electrical signals into mechanical displacements, thereby generating sound waves.

[0076] As shown in the figure, ultrasonic transducers 31 may be packaged opposite to each other at four locations or points on the front, back, left, and right sides of the housing of the waste water tank 200. The ultrasonic transducers 31 are used to vibrate the cleaning liquid contained in the waste water tank 200.

[0077] The ultrasonic cleaning assembly 30 may further include an ultrasonic generator 32, which may be electrically connected to the ultrasonic transducer 31. The ultrasonic generator 32 is a device for generating ultrasonic signals, and may be composed of a modulator and an amplifier, and is mainly used for modulating and amplifying acoustic signals. For example, the ultrasonic generator 32 may emit ultrasonic waves in a frequency range of 15kHz to 200KHz, preferably in a range of 20kHz to 80kHz, and a person skilled in the art may select the frequency range according to the specific cleaning requirements of the wastewater tank 200.

[0078] For example, the ultrasonic transducer 31 can convert the high-frequency oscillation signal from the ultrasonic generator 32 into mechanical vibration, and transmit the mechanical vibration to the cleaning liquid, thereby generating a large number of tiny bubbles in the cleaning liquid. These bubbles are compressed and stretched under the alternating positive and negative pressures formed by the ultrasonic wave, thereby causing the bubbles to burst, and when the bubbles burst, a large amount of air pressure and heat will be released, so that the attached scale (such as the dirt on the inner wall of the shell) in the wastewater tank 200 will fall off and spread into the cleaning liquid, and the cleaning liquid with dirt can be discharged through the discharge opening 204 and the discharge assembly 20, thereby realizing ultrasonic cleaning of the wastewater tank 200.

[0079] In addition, the ultrasonic generator 32 can be arranged according to the specific installation space on the aircraft, and the ultrasonic generator 32 and the ultrasonic transducer 31 (such as Figure 2 ).

[0080] As described above, since the tank body of the wastewater tank 200 may include a multi-layer structure, especially a non-metallic structure, the ultrasonic transducer 31 disposed at the tank body may not easily transmit vibration to the cleaning liquid contained in the wastewater tank 200, thereby significantly reducing the ultrasonic cleaning effect.

[0081] To this end, the ultrasonic cleaning assembly 30 may also be provided with a vibration plate 33. For example, the vibration plate 33 may be a vibration surface steel plate or a vibration surface steel plate, and may be arranged at the tank body of the wastewater tank 200. As an example, the vibration plate 33 may be arranged symmetrically about the tank body of the wastewater tank 200. For example, both the ultrasonic transducer 31 and the vibration plate 33 may be arranged symmetrically about the transverse axis X and the longitudinal axis Y of the wastewater tank 200.

[0082] like Figure 2As shown in FIG. 1 , the transverse axis X may be the direction of the diameter of the wastewater tank 200 , the longitudinal axis Y may be the direction of the axis of the wastewater tank 200 extending through the two end caps, and the vertical axis Z may be substantially perpendicular to the direction of gravity.

[0083] It should be understood that the vibration plate 33 herein is attached to the body of the wastewater tank 200 and is used to replace the original body structure at that location, for example, replacing the original multi-layer structure at that location in a patch-like manner. At this point, it should be understood that the vibration plate 33 is formed as a part of the body of the wastewater tank 200, and can be attached to the surrounding parts of the body of the wastewater tank 200 by various attachment methods such as bonding, bolting, riveting, etc., so as to form a sealed connection.

[0084] like Figure 2 As schematically shown in FIG. 1 , the vibration plate 33 may be arranged at the bottom of the waste water tank 200 relative to the vertical direction Z and at the middle portion relative to the longitudinal axis Y to further induce vibration of the cleaning liquid, thereby improving the efficiency of ultrasonic cleaning.

[0085] After the vibration plate 33 is installed, the inside of the vibration plate 33 will contact the wastewater or cleaning liquid in the wastewater tank 200, and the outside of the vibration plate 33 can correspondingly maintain contact with the ultrasonic transducer 31, thereby transmitting the vibration of the ultrasonic transducer 31 to the cleaning liquid in the wastewater tank 200 to achieve more effective ultrasonic cleaning.

[0086] The cleaning / draining selector 40 may include a plurality of selectively switchable gears, such as a cleaning gear, a draining gear, and a working gear.

[0087] For example, in the cleaning position of the cleaning / draining selector 40, the waste water tank 200 is allowed to be cleaned, and the flushing valve 12 and the drain valve 22 can be selectively opened or closed to achieve the inflow or injection of cleaning liquid and the discharge of waste water and cleaning liquid containing dirt.

[0088] In the discharge gear, the flush valve 12 can be closed, and the discharge valve 22 can be opened. In this gear, it is only used to discharge waste water without performing a cleaning operation of the waste water tank 200.

[0089] Among them, in the working gear, the flushing valve 12 is closed, and the discharge valve 22 is closed. In this gear, the wastewater tank 200 is in a working state, and wastewater is allowed to enter the wastewater tank 200 without being discharged.

[0090] As a preferred embodiment, the flushing connector 14, the drain connector 23 and the cleaning / draining selector 40 can be arranged on the service panel to facilitate the operation of the operation and maintenance personnel.

[0091] Figure 3A schematic control architecture diagram of a cleaning device 100 for an aircraft waste water tank according to a non-limiting embodiment of the present invention is shown.

[0092] As shown in the figure and as a preferred embodiment, the cleaning device 100 for aircraft wastewater tanks may further include a controller 50. The controller 50 may be connected to the flushing valve 12, the drain valve 22, the ultrasonic generator 32, and the cleaning / draining selector 40 to control the opening or closing of the flushing valve 12 and the drain valve 22 based on the gear position of the cleaning / draining selector 40. In particular, when the cleaning / draining selector 40 is in the cleaning gear position, it is necessary to control the opening or closing of the flushing valve 12 and the drain valve 22 according to a predetermined logic to achieve a desired cleaning effect.

[0093] In order to realize automatic flushing of the waste water tank 200 , the cleaning device 100 for an aircraft waste water tank may further include a sensor 60 connected to the controller 50 .

[0094] As an example, the sensor 60 may include a liquid level sensor 61 which may be disposed at an upper or middle portion of the wastewater tank 200 and may be provided in plurality, and a turbidity sensor 62 may be disposed at the discharge opening 204 or in the discharge pipe 21 of the discharge assembly 20 .

[0095] For example, the liquid level sensor 61 can be used to sense the liquid level of the flushing liquid inside the wastewater tank 200, and to determine whether the liquid level in the wastewater tank 200 has reached a predetermined liquid level so as to allow ultrasonic cleaning. The turbidity sensor 62 can be used to sense the turbidity of the flushing liquid discharged through the discharge line 21, for example, the turbidity in NTU (nephelometric turbidity unit), which is called turbidity unit in Chinese. The controller 50 can control the operation (e.g., opening or closing) of the flushing valve 12 and the discharge valve 22 based on the signal from the sensor 60.

[0096] exist Figure 3 In the example shown, the flush valve 12 , the drain valve 22 , the level sensor 61 , and the turbidity sensor 62 may be coupled to the controller 50 via a controller area network (CAN) bus 50A.

[0097] The purge / drain selector 40 can send a discrete signal indicating the gear position of the purge / drain selector 40 to the controller 50 to allow the controller 50 to control the operation of each valve based on the currently selected gear position. In addition, the controller 50 can also send discrete opening and closing signals to the ultrasonic generator 32 to activate ultrasonic cleaning or deactivate ultrasonic cleaning.

[0098] Figure 4A schematic control logic diagram of a cleaning device 100 for an aircraft waste water tank according to a non-limiting embodiment of the present invention is shown.

[0099] like Figure 4 As shown and as a non-limiting example, when it is determined that the wastewater tank 200 needs to be cleaned, the service personnel responsible for aircraft maintenance can connect the flushing connection 14 on the service panel to an external clean water truck, and can connect the discharge connection 23 to an external sewage truck. After completing the wastewater tank discharge service, the maintenance personnel can set the wash / drain selector 40 to the wash position, as shown at 401, to perform the cleaning procedure of the wastewater tank 200.

[0100] Next, at 402 , the controller 50 may control the flushing valve 12 to open, and the drain valve 22 to open. At this time, the turbidity sensor 62 may measure and record the turbidity of the cleaning liquid wastewater discharged through the drain line 21 .

[0101] At 403 , the flushing nozzle 14 may flush (eg, flush in a rotating manner) the inner wall of the wastewater tank 200 for a predetermined time, for example, approximately 10 minutes.

[0102] After completing the flushing procedure, the controller 50 may close the drain valve 22 at 404 , and the flushing valve 12 remains open to allow the flushing line 11 to continue to be flushed and filled with flushing liquid (eg, clean water, or a cleaning liquid with a detergent or an active agent).

[0103] At 405, the liquid level sensor 61 may be used to monitor the liquid level in the wastewater tank 200. When the liquid level sensor 61 in the wastewater tank 200 detects that the liquid level in the wastewater tank 200 reaches a predetermined liquid level, for example, when the wastewater tank 200 is full, the flush valve 12 may be closed at 406, and the drain valve 22 may be kept closed.

[0104] Next, at 407 , the controller 50 may start the ultrasonic generator 32 , for example, by sending a discrete control signal to the ultrasonic generator 32 to operate it, so as to use ultrasonic waves to clean the waste water tank for a predetermined time, for example, for about 5 minutes (min);

[0105] Thereafter, the controller 50 may open the drain valve 22 at 408 and keep the flush valve 12 closed to discharge the cleaned waste water through the drain assembly 20 .

[0106] At 409, the liquid level sensor 61 may be used again to monitor the liquid level in the wastewater tank 200. When the liquid level sensor 61 in the wastewater tank 200 detects that the liquid level in the wastewater tank 200 is at a predetermined level, such as an empty level, the flush valve 12 and the drain valve 22 may be opened at 410, thereby flushing the inner wall surface of the wastewater tank 200 again.

[0107] At 411, the turbidity in the discharge line 21 may be monitored using the turbidity sensor 62. When the turbidity sensor 62 monitors that the turbidity in the discharge line 21 is ≤ 5 NTU, the flush valve 12 may be closed at 412, and the discharge valve 22 may be kept open.

[0108] Next, at 413, the maintenance personnel confirms whether there is wastewater discharge from the sewage truck. After the ground maintenance personnel confirm that there is no wastewater flowing in the sewage truck pipeline, the cleaning / discharge selector 40 can be placed in the working position at 414, and the flushing valve 12 and the discharge valve 22 are closed.

[0109] Finally, at 415 , the maintenance personnel may disconnect the clean water truck and the sewage truck, and end the cleaning procedure of the waste water tank 200 .

[0110] The terms "transverse axis", "longitudinal axis", "upstream", "downstream", "upper portion" and "lower portion" etc., which indicate position or orientation as used herein, are intended only to enable those of ordinary skill in the art to better understand the concept of the present invention shown in the form of a preferred embodiment, and are not intended to limit the present invention. Unless otherwise specified, all orders, positions or orientations are only used for the purpose of distinguishing one element / component / structure from another element / component / structure, and do not represent any particular order, sequence of operations, direction or orientation unless otherwise specified. In alternative embodiments, the "transverse axis" may refer to the "longitudinal axis", and the "upper portion" may refer to the "lower portion" without departing from the scope of the present invention.

[0111] In summary, the cleaning device 100 for an aircraft waste water tank according to the embodiment of the utility model overcomes the shortcomings of the prior art and achieves the intended purpose of the utility model.

[0112] Although the above is a description of the cleaning device for aircraft waste water tanks of the utility model in combination with the preferred embodiments, those skilled in the art should recognize that the above examples are only for illustration and cannot be used as a limitation of the utility model. Therefore, various modifications and variations can be made to the utility model within the spirit of the claims, and these modifications and variations will fall within the scope required by the claims of the utility model.

Claims

1. A cleaning device (100) for an aircraft waste water tank, used for cleaning an aircraft waste water tank (200), and comprising: A flushing assembly (10), the flushing assembly comprising a flushing pipeline (11) for supplying a cleaning liquid into the interior of the waste water tank (200); A discharge assembly (20), the discharge assembly comprising a discharge pipeline (21) for discharging the flushing liquid inside the wastewater tank (200) to the outside of the wastewater tank (200); Characterized in that the cleaning device (100) for an aircraft wastewater tank further comprises: An ultrasonic cleaning assembly (30), comprising an ultrasonic transducer (31) attached to a housing of the wastewater tank (200) and an ultrasonic generator (32) electrically connected to the ultrasonic transducer (31), wherein the ultrasonic transducer (31) causes the cleaning liquid contained in the wastewater tank (200) to vibrate via the housing, thereby achieving ultrasonic cleaning of the wastewater tank (200); and A cleaning / draining selector (40) comprising a cleaning gear, wherein in the cleaning gear of the cleaning / draining selector (40), a cleaning operation is allowed to be performed on the waste water tank (200).

2. The cleaning device (100) for an aircraft waste water tank according to claim 1, characterized in that: The ultrasonic cleaning component (30) further comprises a vibration plate (33), which cooperates with the ultrasonic transducer (31) and is used to vibrate the cleaning liquid contained in the waste water tank (200).

3. The cleaning device (100) for an aircraft waste water tank according to claim 1, characterized in that: The ultrasonic transducer (31) is arranged symmetrically with respect to the waste water tank (200).

4. The cleaning device (100) for an aircraft waste water tank according to claim 3, characterized in that: The ultrasonic transducers (31) include four and are arranged symmetrically with respect to the transverse axis (X) and the longitudinal axis (Y) of the wastewater tank (200).

5. The cleaning device (100) for an aircraft waste water tank according to claim 1, characterized in that: The flushing assembly (10) further comprises a flushing valve (12) arranged on the flushing pipeline (11), and the discharge assembly (20) further comprises a discharge valve (22) arranged on the discharge pipeline (21).

6. The cleaning device (100) for an aircraft waste water tank according to claim 5, characterized in that: The cleaning / discharging selector (40) also includes a discharging gear and a working gear. In the discharge position, the flushing valve (12) is closed and the discharge valve (22) is open; and Wherein, in the working gear, the flushing valve (12) is closed, and the discharge valve (22) is closed.

7. The cleaning device (100) for an aircraft waste water tank according to claim 5, characterized in that: The cleaning device (100) for an aircraft wastewater tank further comprises a controller (50) connected to the flush valve (12), the drain valve (22) and the wash / drain selector (40) to control the opening or closing of the flush valve (12) and the drain valve (22) based on the gear position of the wash / drain selector (40).

8. The cleaning device (100) for an aircraft waste water tank according to claim 7, characterized in that: The cleaning device (100) for an aircraft wastewater tank further comprises a sensor (60) connected to the controller (50), the sensor sensing the liquid level of the washing liquid inside the wastewater tank (200) and / or the turbidity of the washing liquid discharged via the discharge line (21), and the controller (50) controls the operation of the washing valve (12) and the discharge valve (22) based on the signal from the sensor (60).

9. The cleaning device (100) for an aircraft waste water tank according to any one of claims 1 to 8, characterized in that: The flushing assembly (10) further comprises a flushing nozzle (13), which is disposed in the waste water tank (200) and is fluidically connected to the flushing pipeline (11).

10. The cleaning device (100) for an aircraft waste water tank according to any one of claims 1 to 8, characterized in that: The flushing pipeline (11) is fluidically connected to an external clean water truck via a flushing joint (14), while the discharge pipeline (21) is fluidically connected to an external sewage truck via a discharge joint (23).

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