CN105644463A - Vacuum toilet system used for vehicles - Google Patents
Vacuum toilet system used for vehicles Download PDFInfo
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- CN105644463A CN105644463A CN201511015986.0A CN201511015986A CN105644463A CN 105644463 A CN105644463 A CN 105644463A CN 201511015986 A CN201511015986 A CN 201511015986A CN 105644463 A CN105644463 A CN 105644463A
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- bedpan
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- transferring box
- drain valve
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- 239000002351 wastewater Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000012546 transfer Methods 0.000 claims description 133
- 238000012279 drainage procedure Methods 0.000 claims description 83
- 238000004140 cleaning Methods 0.000 claims description 57
- 238000011010 flushing procedure Methods 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 6
- 230000001186 cumulative effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims 1
- 201000009032 substance abuse Diseases 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 8
- 230000006378 damage Effects 0.000 description 8
- 239000008187 granular material Substances 0.000 description 6
- 230000002085 persistent effect Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R15/00—Arrangements or adaptations of sanitation devices
- B60R15/04—Toilet facilities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D35/00—Sanitation
- B61D35/005—Toilet facilities
- B61D35/007—Toilet facilities comprising toilet waste receiving, treatment, storage, disposal or removal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B29/00—Accommodation for crew or passengers not otherwise provided for
- B63B29/02—Cabins or other living spaces; Construction or arrangement thereof
- B63B29/14—Closet or like flushing arrangements; Washing or bathing facilities peculiar to ships
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/02—Toilet fittings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Environmental & Geological Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Sanitary Device For Flush Toilet (AREA)
Abstract
The invention relates to a vacuum toilet system used for vehicles. The vacuum toilet system comprises a urinal, a transit box and a waste water tank, wherein the urinal is provided with a urinal draining port; the transit box is connected to the urinal draining port by means of a urinal draining line, the transit box comprises a transit draining port, a switchable urinal draining valve is arranged in the urinal draining line so as to close or open the urinal draining line, the transit box is connected to a vacuum source and an air pressure source, and the transit box is connected to a transit box pressure sensor used for detecting the internal pressure of the transit box; and the waste water tank is connected to the transit draining port by means of a transit draining line, and a switchable transit draining valve is arranged in the transit draining line so as to close or open the transit draining line. The invention further relates to a method for controlling the vacuum toilet system. The vacuum toilet system is mainly used for the vehicles such as trains, planes and buses as well as ships.
Description
Technical field
The present invention relates to a kind of vacuum closet system for the vehicles, comprising: have the bedpan of bedpan discharge outlet; The transferring box of bedpan discharge outlet it is connected to by means of bedpan drain line, wherein transferring box includes transfer discharge outlet, wherein switchable bedpan drain valve is arranged in bedpan drain line to close or to open bedpan drain line, wherein transferring box is connected to vacuum source and air pressure source, and wherein transferring box is connected to the transferring box pressure transducer of the pressure being applicable to detection within transferring box; Be connected to the waste water tank of transfer discharge outlet by means of transfer drain line, wherein switchable transfer drain valve is arranged in transfer drain line to close or to open transfer drain line. The method that another aspect of the present invention relates to control this vacuum closet system.
Background technology
Vacuum closet system is mainly used on the vehicles such as train, aircraft, bus or on ship. The ultimate principle of this vacuum closet and NAPT function are, by applying vacuum in the discharge outlet of bedpan, waste water is discharged bedpan. Thus, waste water can remove and obtain through this program the bedpan of cleaning safely from bedpan.
The vacuum closet with usual structure on the vehicles is known from ZL2005/80001631 and ZL2005/80000994. It addition, it is known for having the vacuum closet improving function from ZL201180008521 and ZL201080041694. It is known from ZL201130343246 and ZL02812229 for the particular valve in this vacuum closet.
Generally, these vacuum closet systems and component allow to operate this vacuum closet on a vehicle safe and correctly. But, in practice, this vacuum closet being commonly installed on such as public train in public is abused and destruction has become as distinct issues. This abuse and destruction possibly even reach the parts removed degree of such as packing ring of vacuum closet, and hereafter come-at-able technology component is manipulated by. Even if specifically indicating it addition, clearly illustrate and indicate some, but abuse still occurs, for instance is often thrown away in bedpan and attempts to use this vacuum closet system to wash away these refuses by refuse that is big or that expand.
Solve these abuses and the first approach destroyed is shown in ZL201010140582, which describe the improvement hinge of the closet seat for this vacuum closet.The infringement that this hinge can be effectively prevented in using improperly and destroying to hinge or closet seat, because its mechanical realization prevents this abuse and destruction. But, this approach does not overcome a lot of different types of abuse and destruction.
Summary of the invention
Therefore, it is an object of the invention to provide a kind of vacuum closet system having and improving function and safety, to overcome these abuses and to destroy.
This purpose is realized by the vacuum closet system of aforementioned background art partial interpretation, its have be connected to the closet control unit of bedpan drain valve, transfer drain valve, transferring box pressure transducer, for signal transmit vacuum source and air pressure source, wherein closet control unit is suitable to control the bedpan drainage procedure of bedpan, including step: control vacuum source to produce vacuum in transferring box; Control bedpan drain valve to be switched to open mode from closed mode; And wherein closet control unit is further applicable to the pressure sensor signal reading transfer pressure transducer pressure sensor signal and predetermined vacuum level to be compared, if and pressure sensor signal is lower than predetermined vacuum level, then only open bedpan drain valve.
The special adaptations that the present invention realizes solves the problem caused due to abuse and destruction vacuum closet. Operation at closet hardware hinders vacuum source to produce enough vacuum levels in transferring box, such as because vacuum source self is damaged or be likely to be due to not completely close the leakage that valve produces, or damage the vacuum hampered in transferring box and reach specifically enough vacuum levels, it may happen that this situation, namely wherein transferring box is only set under ambient pressure, or even it is maintained above under the high pressure of ambient pressure level, for instance, if aforementioned transferring box is drained by this high pressure. When transferring box has improper vacuum level, if bedpan drain valve is opened, it is possible to severe contamination can be caused. Worst when, the high pressure in transferring box may result in and refuse is carried out transferring box in bedpan.
According to the present invention, it is therefore prevented that the generation of this fault, it is in that bedpan drain valve is only opened when enough vacuum levels such as occur in transferring box significantly lower than the pressure of ambient pressure. Allowing bedpan drain valve to open the scope of required vacuum level and can be located between 0.3-0.8 bar, particularly 0.45 bar is to 0.65 bar. Should be understood that predetermined vacuum level is the predetermined condition for opening bedpan drain valve, but be not construed as indicator or the trigger of program for opening bedpan drain valve. This means different control programs, such as temporal sequence can be used for controlling opening of bedpan drain valve, but this control program will monitor pressure sensor signal, and if pressure sensor signal lower than predetermined vacuum level time, that only continues bedpan drain valve opens program.
Generally, in the present description and claims, vacuum is defined as absolute pressure value and is usually located between 0 and 1 bar, wherein has the vacuum (such as, 0.3 bar) of more fractional value and is defined as than has the vacuum that the vacuum of bigger numerical value such as 0.8 bar is bigger. Vacuum also can be defined as percentage ratio. This definition considers the dependency to ambient pressure, and this is relevant to some application of the present invention. In view of 100 meters of height above sea level places more than sea level, the absolute pressure of 0.7 bar can be enough to be used as vacuum, is not then such more than sea level during 4000 meters of height above sea level, and now around absolute pressure will be 0.6 bar.The vacuum values of percentage ratio is calculated as:
%Vac=100 �� (1-pVac/pAmb),
Wherein,
The vacuum values of %Vac=percentage ratio,
PVac=Absolute truth null value (bar),
PAmb=ambient pressure (bar).
Therefore, 0% vacuum is meant to ambient pressure, and 100% vacuum is meant to the space emptied completely.
According to the present invention, transfer pressure transducer is arranged on transferring box to read the vacuum level within vacuum tank. It is appreciated that, according to specification and claims, this pressure transducer can be used for measuring the pressure of more than vacuum and ambient pressure, for instance overvoltage. This can by have enough measure scope single pressure sensor realize. Selectively, it is provided that two different pressure sensor unit or pressure switch, one of them pressure transducer or switch element are used for measuring vacuum level, and another is used for measuring overpressure level. According to the present invention as above, at least need vacuum pressure unit for controlling the present invention, but two unit can form the pressure transducer according to the present invention or switch, and also can provide for measuring the additional functionality of overvoltage. Furthermore, it is to be understood that according to the present invention, transfer pressure transducer can be considered as pressure switch or vacuum switch or have such as the switch of pressure switch and the dual-use function of vacuum switch. Therefore, this sensor should be understood measure similar signal or determine numeric state.
According to the first preferred implementation, closet control unit applies also for unlatching transfer drainage procedure, including: control air pressure source to produce pressure in transferring box, to be controlled in transferring box to produce certain delay the after pressure open transfer drain valve in air pressure source, wherein said delay is accomplished by: read the pressure sensor signal of transfer pressure transducer, this pressure sensor signal (is implemented as the situation of switch compared with predetermined pressure level at sensor, this will be overall function), and after predetermined pressure level reaches, open transfer drain valve immediately, or it is controlled in transferring box to produce the predetermined amount of time after pressure in air pressure source, open transfer drain valve.
Transferred to from bedpan after in transferring box by vacuum at waste water, it is necessary to waste water is transferred in waste water tank. Should be understood that this draining of transferring box can occur after carrying out bedpan draining every time, it is preferable that with the drainage procedure of different FREQUENCY CONTROL bedpans and transferring box, for instance empty transferring box with more more infrequent than bedpan.
The special adaptations that this embodiment according to the present invention provides, opens transfer drain valve with certain delay theing start to produce in transferring box after high pressure. This delay has the effect that when transfer drain valve is opened, and has occurred in that a degree of high pressure in transferring box. Thus, the waste water in transferring box produce inside transferring box compared with the pressure in the waste water tank generally corresponding to ambient pressure under notable pressure differential with increase speed migrate out transferring box. Having an advantage in that, any solid material in waste water is safely diverted by transfer drain valve and transfer drain line, and reduces the risk that these solid materials that possibly be present in transferring box due to abuse or destruction cause blocking significantly. Can causing swabbing effect after waste water bag with high speed through the waste water bag of transfer drain line, this helps clean up transfer drain valve and prevents the fault of this transfer drain valve in for a long time.
According to another preferred implementation, if being controlled in transferring box to produce predetermined time period pressure sensor signal after vacuum be not on below predetermined vacuum level at vacuum source, closet control unit is further adapted for opening transfer drainage procedure, and wherein transfer drainage procedure preferably corresponds to the transfer drainage procedure of above-mentioned explanation. When transferring box being not reaching to enough vacuum levels to carry out the waste water transfer from bedpan to transferring box, it is preferable that transferring box is empty to allow maintenance and to prevent pollution. This realizes by automatically carrying out transfer drainage procedure, and the waste water wherein being likely to still appear in transferring box from aforementioned bedpan drainage procedure is transferred to waste water tank. Generally, this transfer drainage procedure carries out preferably by transfer drainage procedure preferably described before, has the delay opening transfer drain valve to produce enough high pressure in transferring box. However, alternatively, it is preferable that owing to stoping the transfer drainage procedure carrying out simplifying under the such particular condition of obstacle setting up enough vacuum in transferring box, may be equally used in transferring box, set up enough pressure. Therefore, for may be alternatively used for this situation from the additional programs of transferring box draining.
According to another preferred implementation, if having proceeded by the bedpan drainage procedure of pre-determined number from last transfer drainage procedure or if content horizon sensor indicates the content of predeterminated level in transferring box, then closet control unit is also applied for opening transfer drainage procedure. As discussed above, it is preferable that transfer drainage procedure is carried out than bedpan drainage procedure more infrequently. Specifically, transferring box is configurable to present the wastewater volume that multiple bedpan drainage procedure is discharged so that the waste water flowing out bedpan can be collected through a series of bedpan drainage procedure before must start up transfer drainage procedure. It is particularly preferred that after completing 5-20 bedpan drainage procedure, more specifically, it is possible to after completing 10-15 bedpan drainage procedure, open transfer drainage procedure. This will provide for the well balanced of transferring box volume, and transferring box volume therein is enough to undertake substantial amounts of bedpan drainage procedure, simultaneously sufficiently small again, effectively and quickly to set up vacuum inside transferring box within the short time for carrying out this bedpan drainage procedure.
It is further preferred that transfer drainage procedure starts when stating the minimum pressure level of formula calculating under use:
PT=EPF �� ((VT+VTL) �� pA)/VUF pA
Wherein:
PT=needs the minimum pressure level [bar] for transfer drainage procedure,
EPF=excess pressure coefficient, selected from the scope of 1-1.5,
The cumulative volume [liter] of VT=transferring box,
The volume [liter] of the transfer drain line in VTL=transfer drain valve downstream,
PA=ambient pressure [bar],
If being not filled by residual volume [liter] when VUF=transferring box is full.
In order to carry out suitable transfer drainage procedure, it is necessary to have enough pressure in transferring box, even if last waste water being discharged transferring box and being transferred into the final stage of waste water tank. In this final stage, the gas volume of initial press will expand the whole volume close to transferring box, and must be further able to expand in transfer drain line. The enough pressure being positioned at more than ambient pressure must still occur. Inventors realized that the stress level being suitable for this process possibly relies on the setting of vacuum closet system and determines.Different geometries and surroundings affect the level of convenient pressure. The volume of transferring box and transfer drain line is more big, the expansion rate of forced air more high and it is thus desirable to stress level more high. It addition, the gas volume of initial press, namely in so-called transferring box to be not filled by residual volume more little, the more high and therefore required stress level of expansion rate is more high. Generally, transfer drain valve is arranged in transferring box place. But, it has been desirable in certain applications, transfer drain valve can be disposed in distance transferring box a distance. In this case, the volume crossing over the part of the transfer drain line of this distance should be added to the cumulative volume VT of transferring box.
Further, it is preferable that bedpan drainage procedure is unlocked under minimum vacuum level, minimum vacuum level therein uses following formula to calculate:
PvT=1/EVF �� pA �� (VUF-VFL)/(VUF+VBL)
Wherein:
PvT=needs the minimum vacuum level [bar] for bedpan drainage procedure,
The excessive vacuum coefficient of EVF=, selected from the scope of 1-1.5,
If being not filled by residual volume when VUF=transferring box is full, it is preferable that after rinsing recently transferring box be not filled by volume [liter],
The volume [liter] of the bedpan drain line in VBL=bedpan drain valve downstream,
PA=ambient pressure [bar],
The volume [liter] of VFL=flushing water.
According to this preferred implementation, it is determined that the principle of stress level is used to the vacuum level of bedpan drainage procedure. In this case, generally same principle is used for determining the minimum vacuum level in transferring box as discussed above.
But, the inventors discovered that some differences compared with transfer drainage procedure. Generally, when each transfer drainage procedure starts, transferring box is all full, and has and predetermined be not filled by volume. In transfer drainage procedure, build on volume therein accordingly, with respect to pressure, there is steady state value. This is likely to different in the situation of the bath storing variable number before from the transferring box in bedpan drainage procedure. Therefore, what wherein vacuum was established in transferring box is not filled by volume is not constant, but will periodically be increased to whole transferring box volume after each transfer drainage procedure, is gradually lowered then as each bedpan drainage procedure. This can be arranged by the simplification of minimum vacuum level and solve, and wherein the minimum of transferring box is not filled by volume, is namely not filled by volume when needing transfer drainage procedure, is used as the basis calculated.
But, this will produce very high vacuum level under all these situations, and wherein transferring box is not in the state before being in transfer drainage procedure, but is likely to have been attached to only once or twice water flushing. Therefore, according to preferably arranging convention, consider actual to be not filled by volume in the arranging of minimum vacuum level of bedpan drainage procedure. This can by count after last transfer drainage procedure flushing number of times and therefrom calculate transferring box the volume that is not filled by realize. Selectively, transferring box horizon sensor can be used.
It addition, bedpan drain valve is generally arranged to close to bedpan. Therefore, the volume of bedpan drain line is included in the volume that vacuum is established. It is appreciated that, when being fitted close to by the second valve in the bedpan drain line that transferring box is arranged, the volume of bedpan drain line should not be added to being not filled by residual volume VUF of transferring box, and should be added in flushing water volume VFL.
Flushing water volume is the volume of the flushing water being injected in bedpan during bedpan drainage procedure.
According to another preferred implementation, closet control unit is suitable to be programmed for concrete cleaning procedure when installing vacuum closet system by means of user interface, and in the operation of vacuum closet system, cleaning procedure is started afterwards when receiving activation signal by means of user interface, described cleaning procedure comprises the following steps: control vacuum source to produce vacuum in transferring box, flushing water is injected the specific washing time section by means of user interface programming before continuing in bedpan, and control bedpan drain valve to start to open in later predetermined amount of time in the injection of described flushing water. according to this preferred implementation, vacuum closet system is adapted for specific cleaning procedure. cleaning procedure to be construed as a kind of program, and wherein closet boiling water is discharged from waste water, and this drainage procedure combines with by flushing water flushing bedpan.
According to present embodiment, in the beginning of cleaning procedure, vacuum source is controlled, and is namely activated to produce vacuum in transferring box. This is just set up described vacuum for receiving once the signal being rinsed program. This signal can such as such as can be received by the button of user's manual actuation by means of user interface. Further, flushing water is injected in bedpan. This can simultaneously complete with the activation of vacuum source, or can complete before or after the activation of this vacuum source. Flushing water cleaning of bedpan and dilutes waste water therein. Thereafter, the mixing of flushing water and waste water may remain in bedpan. The injection of flushing water continue for the specific persistent period. This persistent period is directly related with the volume of the flushing water injected in bedpan. In some specifically application, the flushing water of large volume is preferred, and in other application, the flushing water of less volume is probably preferably. According to the present invention, this can install closet time setting program. Being appreciated that this setting program only occurs when mounted, and afterwards, the interval therefore set such as injects persistent period of flushing water and is kept for the operation of closet.
It addition, according to present embodiment, the predetermined amount of time after opening injection flushing water so that bedpan drain valve is opened. Therefore, the time that bedpan drain valve is opened is independent of being programmed that the persistent period that flushing water injects before in installation procedure. This particular combination of the set time in the convention of programmable time and cleaning procedure causes that the interval between the opening of stopping that flushing water injects and bedpan drain valve can be shortened (if the flushing water of large volume is injected into) and extend (if the flushing water of small size is injected into). Flushing water injects and even can intersect with opening of bedpan drain valve. But, which ensure that further cleaning procedure can be carried out safely by predetermined convention and interval.
Further, preferred closet control unit is further adapted for the not fully closed state of detection bedpan drain valve, if and this not fully closed state is detected, starting cleaning procedure, described cleaning procedure comprises the following steps: inject in bedpan by least one flushing water nozzle by the flushing water in flush box, control vacuum source to produce vacuum in transferring box, control bedpan drain valve to be switched to open mode from closed mode. Due to abuse or damage, it is likely to often a kind of situation gone wrong occur in vacuum closet.When smaller or greater product is thrown away bedpan and is captured in bedpan drain valve, it may occur that this situation. In this case, bedpan drain valve may be unable to completely close due to the blocking of the movement of valve. Due to the big frequency of this situation, if under each this situation, closet, by cutting out and will need repairing, will be very disadvantageous. Therefore, according to present embodiment, closet control unit is adapted to detect for this not fully closed state and will be made great efforts to overcome this kind of situation by the cleaning procedure named as " repair flush cycle (repairflushcycle) " by carrying out. By this cleaning procedure, product or the granule of blocking bedpan drain valve are likely to be rushed out its blocking position in transferring box, and thus allow for vacuum closet system and operate with normal state behind. Cleaning procedure can be undertaken by the step of aforementioned cleaning procedure. However, it is contemplated that cleaning procedure must flow through Partial Blocking, namely not fully closed bedpan drain valve starts, and cleaning procedure can under different conditions and undertaken by different parameters. Such as, cleaning procedure is likely to suppress to need specific vacuum level in transferring box, can not realize because it is likely to be due to the not fully closed of bedpan drain valve. It addition, cleaning procedure carries out increasing the effect of granule or the product washing away blocking bedpan drain valve possibly through the flushing water of large volume. Other improvement can also be made.
Furthermore, the specific aspect of this embodiment is the not fully closed mode of detection bedpan drain valve. Revising according to first, closet control unit is suitable to by reading the pressure signal of transferring box pressure transducer and being activated this pressure signal with vacuum source to produce the minimum vacuum level of predetermined amount of time after vacuum in transferring box or detect the not fully closed state of bedpan drain valve in transferring box compared with the minimum rate of vacuum level rate of increase after generation vacuum with being activated at vacuum source. If it addition, the parameter setting by the not fully closed state of instruction bedpan drain valve is " being (YES) " state when closet control unit is suitable to be not reaching to minimum vacuum level in predetermined amount of time or be not carried out minimum vacuum horizontal rate of increase. According to present embodiment, realized the detection of not fully closed state by the pressure monitored within transferring box. The advantage of this approach is in that to be used in the sensor signal of the pressure transducer at transferring box place, in any case it typically requires other programs for vacuum closet. Therefore, there is no need to extra sensor. Principle depends on if there is the leakage by not fully closed bedpan drain valve, the then effect that the vacuum within transferring box can not be set up at typical condition. Or, vacuum in transfer will can not realize the level and this not fully closed indicator that can be used as instruction bedpan drain valve or the increase that need, namely in transferring box vacuum level time variability (timerate) under first the deriving (firstderivation) if situation when will be fully off lower than bedpan drain valve of pressure, and this will allow this not fully closed determining rapidly. Two kinds of approach all result in the determination of not fully closed state and thus allow for opening the cleaning procedure for removing this situation.
According to the embodiment that another is optional or extra, bedpan drain valve includes valve casing, it is connected to air pressure source to produce the pressure of projecting pressure in valve casing, and wherein closet control unit is suitable to detect the not fully closed state of bedpan drain valve by monitoring the pressure signal of the bedpan drain valve pressure transducer measuring valve casing internal pressure, if and wherein closet control unit is further adapted for the parameter setting of the not fully closed state when the pressure signal of bedpan drain valve pressure transducer is not higher than minimum pressure level by instruction bedpan drain valve in "Yes" state.This particular implementation depends on the bedpan drain valve with particular design, and wherein bedpan draining valve housing is set under the pressure of projecting pressure. This is the concrete setting of a blocking contributing to preventing bedpan drain valve and leakage, this is because prevent overvoltage and any in operation granule being likely to blocking or product will be stoped to enter in the gap of bedpan drain valve. These granules of promotion and product are returned in circuit and contribute in these granules or transferred product to transferring box by the high pressure in housing. It addition, pressure will be the good indicator for not fully closed state, because under this not fully closed state, owing to being incorporated into the air in bedpan drain line, pressure will for good and all reduce. Therefore, in this particular case, the pressure signal monitoring bedpan drain valve pressure transducer will allow reliably to determine the not fully closed state of bedpan drain valve.
According to another preferred implementation, if closet control unit detects the not fully closed state of bedpan drain valve after described cleaning procedure, then repeat described cleaning procedure, wherein closet control unit is further adapted for the number of repetition of cleaning procedure is restricted to predetermined number of times, if and after the cleaning procedure of described pre-determined number has be carried out, closet control unit detects the not fully closed state of bedpan drain valve, then vacuum closet is switched to failure state. This embodiment improved further is suitable to if be detected that the not fully closed state of bedpan drain valve then carries out multiple reparation flush cycle. This can carry out by this way, as long as not fully closed state namely being detected, just continuously performs total of three cleaning procedure one by one; Or carry out by this way, as long as not fully closed state namely being detected, begin to the first reparation cleaning procedure and when the not fully closed state of bedpan drain valve still being detected, start another and repair cleaning procedure, and this can repeat many times. According to this embodiment, the number of times repeated is limited, if and repaired, what have been carried out finite number of time, the not fully closed state also detecting that bedpan drain valve after cleaning procedure, then vacuum closet system will automatically switch to error condition and not allow further operation. Preferably, the number of times repairing flush cycle is restricted to 2-5, and especially 3.
Another aspect of the present invention is for controlling the method for the vacuum closet system of use in the vehicles, wherein carry out the bedpan drainage procedure with the bedpan of bedpan discharge outlet, comprise the following steps: controlling vacuum source to produce vacuum inside the transferring box being connected to bedpan discharge outlet by means of bedpan drain line, wherein transferring box is connected to described vacuum source and includes transfer discharge outlet; Read the pressure sensor signal of transferring box pressure transducer to determine the vacuum level within transferring box; By pressure sensor signal compared with predetermined vacuum level; And when pressure sensor signal is lower than predetermined vacuum level, the switchable bedpan drain valve controlling to be arranged in bedpan drain line is to be switched to open mode from closed mode; And in transfer drainage procedure, by disabling vacuum source, close bedpan drain valve, activating the air pressure source being connected to transferring box to produce the pressure of projecting pressure inside transferring box, to open the changeable transfer drain valve being arranged in transfer drain line to open transfer drain line, the waste water in transferring box is transferred to the waste water tank being connected to transfer discharge outlet by means of transfer drain line.
The method can also be improved further, wherein, transfer drainage procedure comprises the following steps: disabling vacuum source, closes bedpan drain valve, control air pressure source to produce pressure in transferring box, to be controlled in transferring box to produce certain delay the after pressure open transfer drain valve in air pressure source, and wherein said delay realizes by reading the pressure sensor signal of transfer pressure transducer, compared with predetermined stress level and when reaching predetermined stress level, pressure sensor signal being opened transfer drain valve at once; Or, by transfer drainage procedure, the waste water in transferring box is transferred in waste water tank, and is controlled in transferring box to produce the predetermined amount of time after pressure in air pressure source and opens transfer drain valve and realize.
The method can also be improved further, wherein, being not less than predetermined vacuum level be switched on if closet control unit is further adapted for being controlled in transferring box to produce pressure sensor signal in the predetermined amount of time after vacuum at vacuum source, wherein transfer drainage procedure preferably corresponds to transfer drainage procedure as above.
Additionally, the method can also be modified, wherein, if if owing to proceeded by the bedpan drainage procedure of pre-determined number from last transfer drainage procedure or content horizon sensor indicates the content of predeterminated level in transferring box, then opening transfer drainage procedure.
Additionally, the method can also be modified by following steps: programs specific washing time section by means of user interface when installing vacuum closet, and afterwards in the operation of vacuum closet, cleaning procedure is started when receiving activation signal by means of user interface, described cleaning procedure comprises the following steps: control vacuum source to produce vacuum in transferring box, injects flushing water and opens with control bedpan drain valve in persistently described predetermined washing time section the predetermined amount of time after the injection of described flushing water starts in bedpan.
Additionally, the method can also be modified by following steps: the not fully closed state of detection bedpan drain valve, and if be detected that this not fully closed state then starts cleaning procedure, described cleaning procedure comprises the following steps: be injected into from flush box in bedpan by flushing water by least one flushing water nozzle, control vacuum source to produce vacuum in transferring box, control bedpan drain valve to be switched to open mode from closed mode.
Additionally, the method can also be modified, wherein, compared with reading the pressure signal of transferring box pressure transducer the minimum vacuum level of predetermined amount of time that is activated by described pressure signal after with generation vacuum in transferring box with vacuum source, or it is activated compared with producing the horizontal rate of increase of minimum vacuum after vacuum in transferring box, to detect the described not fully closed state of bedpan drain valve with at vacuum source; And if wherein it is not reaching to minimum vacuum level within a predetermined period of time, or be not carried out the horizontal rate of increase of minimum vacuum, then the parameter setting by the not fully closed state of instruction bedpan drain valve is "Yes" state.
Additionally, the method can also be modified, wherein, bedpan drain valve includes the valve casing being connected to air pressure source, and inside valve casing, produce the pressure of projecting pressure, wherein the not fully closed state of bedpan drain valve detects in the following manner: the pressure signal of the bedpan drain valve pressure transducer of valve casing internal pressure is measured in detection, if and the pressure signal of bedpan drain valve pressure transducer is not more than minimum pressure level, then the parameter setting by the not fully closed state of instruction bedpan drain valve is "Yes" state.
It addition, the method can also be modified by following steps: if after described cleaning procedure, closet control unit detects the not fully closed state of bedpan drain valve, then repeat described cleaning procedure; By the time number limiting of cleaning procedure repetition to pre-determined number; And after the cleaning procedure having carried out described pre-determined number, if closet control unit detects the not fully closed state of bedpan drain valve, then vacuum closet is switched to failure state.
It is appreciated that the preferred implementation of the method according to the invention and the method preferably can be undertaken by vacuum closet system as explained before. The characteristic of the amendment of the preferred implementation of the method and the method and the advantage vacuum closet system corresponding to explaining before, and it is understood that the functional method being applied in an identical manner control vacuum closet system explained before.
Accompanying drawing explanation
Hereinafter, it is explained with reference to the drawings the preferred embodiment of the present invention.
Fig. 1-5 shows the cross sectional view of the vacuum closet system according to the preferred embodiment of the present invention, wherein with the program that carries out bedpan drainage procedure and transferring box draining for order.
Detailed description of the invention
As can be seen from the drawings, vacuum closet system includes the bedpan 10 with bedpan discharge outlet 11.
Bedpan discharge outlet 11 is connected to transferring box 20 by means of bedpan drain line 12. Bedpan drain valve 13 is inserted in this bedpan drain line and is disposed proximate to transferring box 20. It is generally understood that as shown in the figure, it is possible to use single bedpan drain valve. But, in other application, it is possible to insert two valves in bedpan drain line, one of them valve is close to bedpan outlet and valve close to the import of transferring box. This provides the safe enough preventing leakage and counter-pressure.
Bedpan drain line is connected to transferring box at the certain level place of the upper end close to transferring box. Transferring box discharge outlet 21 is arranged in the bottom of transferring box and is connected to waste water tank 30 by means of transfer drain line 22. Transfer drain valve 23 is inserted into transfer drain line 22 close to transferring box.
At the top of transferring box, vacuum line 41 is connected to transferring box and is connected with vacuum source 40 by transferring box. It addition, at the top of vacuum tank, pressure line is connected to transferring box and transferring box is connected to pressure source 50.
Now from Fig. 1, as it is shown in figure 1, manually promoted button 15 to start flush cycle by user. Button 15 is connected to control unit 100. Control unit 100 is connected to the pressure transducer of transferring box 20, is connected to valve 13,23, is connected to vacuum source 40 and pressure source 50, and these circuits are not shown in the accompanying drawings. Thus, vacuum source 40 is activated and produces vacuum in transferring box 20. It addition, flushing water 16 injects in bedpan 10 and mixes with the waste water in bedpan. The volume of flushing water was determined by the persistent period injected, its just setting program by the user interface at control unit 100 place when vacuum closet system is installed.
Being manually activated the later scheduled time at button 15, control unit reads whether the pressure transducer at transferring box place 30% or less vacuum level occurs to determine in transferring box. Generally in normal operation, this vacuum level have been carried out and therefore control unit by control bedpan drain valve to open in this scheduled time.
When being not carried out 30% or less required vacuum level in this scheduled time, control unit will wait the extra time and again reads off the pressure sensor signal of transferring box after this.If achieving required vacuum level after the time that this is extra, control unit will control bedpan drain valve to open after the time extra at this.
Even at when being not carried out required vacuum level in the extra time, control unit is not fully closed by detection bedpan drain valve. In this case, reparation flush cycle will be started by control unit. First, will be read by whether sensor detection occurs to vacuum level when young or the pressure whether being not above ambient level in transferring box in transferring box. If the pressure of projecting pressure occurs in transferring box, flush cycle will not be started, because the opening probably due to transferring box is back in bedpan causes pollution of bedpan drain valve. Alternatively, in this case, transfer drainage procedure will start as explained below.
When being not detected by the pressure of projecting pressure inside forbay, flush cycle will start, and wherein bedpan drain valve is opened and flushing water is discharged in transferring box from bedpan. After this, will the closed mode of detection bedpan drain valve, and if be detected that closed mode completely, vacuum closet system will enter readiness program and be next step ready for operation. When not fully closed state still being detected, startup and this general will be repeated when not fully closed state again being detected afterwards by another flush cycle at once. When total of three repairs that cleaning procedure completes, bedpan drain valve is still not fully closed, closet will automatically into malfunction, it is impossible to for further ready for operation afterwards.
Occur after predetermined time or extra time vacuum level be 30% or less when, bedpan drain valve will be controlled by control unit and open. The mixture of waste water and flushing water will be discharged bedpan and enter in transferring box. Opening the later scheduled time at bedpan drain valve, it will be closed again.
After bedpan drain valve is again switched off, vacuum closet system will enter SBR and is new operation, and namely new flush cycle is ready. If as long as completing the horizon sensor instruction within 12 cleaning procedures altogether or transferring box after last transfer drainage procedure to achieve specific maximum horizontal already by the waste water within transferring box, then transfer drainage procedure will be started by control unit. Under this situation, pressure source will be activated, and transferring box will be placed in the pressure of more than ambient pressure level. The scheduled time after pressure source starts, transfer drain valve 23 will be opened. In this scheduled time, sizable pressure of more than ambient pressure will occur in transferring box, for instance the pressure of 2 bars will occur in transferring box. By being applied on the waste water in transferring box by this pressure, the waste water within transferring box will discharge transferring box with sizable speed. This will assist in releases transferring box by any granule or article, and enters in waste water tank through transfer drain line. Opening later predetermined amount of time at transfer drain valve, control transfer drain valve is again switched off by control unit, and transferring box will be totally emptied with this understanding. Afterwards, vacuum closet system will turn to ready mode and by ready for operation and new cleaning procedure.
The stress level being appreciated that 2 bars is not a fixed value for any vacuum closet system. On the contrary, this level depends on the cumulative volume of transferring box, the length (or, be accurately volume) remaining unfilled volume and transfer drain line of transferring box when transfer drainage procedure.The cumulative volume of transferring box and residue are not filled by that volume is more little and transfer drain line is more long, for suitable bedpan drainage procedure, it is necessary to more high vacuum level. Such as, if the transferring box that installation volume is 35 liters, if at least a part of which transferring box is filled 50% (the unfilled residual volumes corresponding to 17.5 liters), start transfer drainage procedure, and transfer drain line has the length of 0.8 liter of volume, then the stress level of 1.25 bars is likely to enough. But, if only installing the transferring box (wherein have 9 liters be not filled by residual volume) of 20 liters of volumes and installing the bedpan drain line of equal length, then stress level must be higher, it is possible to is 1.5 bars. Vice versa, if installing the transferring box of 35 liters of volumes, if wherein transferring box is filled 50%, startup transfer drainage procedure and transfer drain line have the length of 5 liters of volumes, then be also required to higher stress level such as 1.5 bar. Generally, stress level can use below equation to calculate:
PT=EPF �� ((VT+VL) �� pA)/VUF pA
Wherein:
PT=needs the stress level for transfer drainage procedure
EPF=excess pressure coefficient
The cumulative volume of VT=transferring box
The volume of VL=transfer drain line
PA=ambient pressure
VUF=is not filled by residual volume
It is appreciated that EPF selects so that vacuum closet system adapts to geometric specifications requirement in the scope of 1 to 1.5, for instance the gradient of the diameter of transfer drain line, the curvature of transfer drain line in transfer exit and transfer drain line. If if curvature has the curvature of minor radius or wide-angle and inclination angle and diameter is little, this coefficient should be higher. Vice versa, and it is less that large radius or low-angle curvature, big gradient and big diameter may result in EPF.
Calculate stress level suitable in transferring box can be used in an identical manner calculate the suitable vacuum level in transferring box for the principle controlling suitable transfer drainage procedure, for controlling suitable bedpan drainage procedure.
Claims (20)
1. for a vacuum closet system for the vehicles, including:
-bedpan, it has bedpan discharge outlet,
-transferring box, it is by means of toilet drainage connection to bedpan discharge outlet, and wherein said transferring box includes transfer discharge outlet,
Wherein switchable bedpan drain valve is arranged in described bedpan drain line to close or to open bedpan drain line,
Wherein transferring box is connected to vacuum source and air pressure source,
Wherein transferring box is connected to transferring box pressure transducer or the switch of the pressure being applicable to detection within transferring box,
-waste water tank, it is connected to transfer discharge outlet by means of transfer drain line, and wherein switchable transfer drain valve is arranged in transfer drain line to close or to open transfer drain line,
It is characterized in that, also including closet control unit, described closet control unit is connected to bedpan drain valve, transfer drain valve, transferring box pressure transducer or switch, vacuum source and air pressure source for signal transmission,
Wherein closet control unit is suitable to control the bedpan drainage procedure of bedpan, comprises the following steps:
-control vacuum source to produce vacuum in transferring box,
-control bedpan drain valve to be switched to open mode from closed mode, and
-wherein closet control unit be further applicable to:
Read the pressure sensor signal of transfer pressure transducer,
Pressure sensor signal and predetermined vacuum level are compared, and
If pressure sensor signal is lower than predetermined vacuum level, then only open bedpan drain valve.
2. vacuum closet system according to claim 1, wherein, described closet control unit applies also for unlatching transfer drainage procedure, including:
Control air pressure source to produce pressure in transferring box,
To be controlled in transferring box in air pressure source producing the certain delay after pressure, open transfer drain valve, wherein said delay is realized by any one in following two mode:
Read the pressure sensor signal of transfer pressure transducer, by this pressure sensor signal compared with predetermined pressure level, and after predetermined pressure level reaches, open transfer drain valve immediately; Or
It is controlled in transferring box in air pressure source produce the predetermined amount of time after pressure, open transfer drain valve.
3. vacuum closet system according to claim 1 and 2, wherein, if being controlled in transferring box to produce the predetermined amount of time pressure sensor signal after vacuum be not on below predetermined vacuum level at vacuum source, then closet control unit is further adapted for opening transfer drainage procedure
Wherein said transfer drainage procedure preferably corresponds to the transfer drainage procedure described in claim 2.
4. vacuum closet system according to claim 2, wherein, if having proceeded by the bedpan drainage procedure of predetermined quantity from last transfer drainage procedure or if content horizon sensor indicates the content of predeterminated level in transferring box, then closet control unit is also applied for opening transfer drainage procedure.
5. vacuum closet system according to claim 1, wherein,
Transfer drainage procedure starts when stating the minimum pressure level of formula calculating under use:
PT=EPF �� ((VT+VTL) �� pA)/VUF pA
Wherein:
PT=needs the minimum pressure level for transfer drainage procedure,
EPF=excess pressure coefficient, selected from the scope of 1-1.5,
The cumulative volume of VT=transferring box,
The volume of VTL=transfer drain line,
PA=ambient pressure,
VUF=is not filled by residual volume when transferring box is full.
6. vacuum closet system according to claim 1, wherein, described bedpan drainage procedure is when minimum vacuum level, and this minimum vacuum level uses following formula to calculate:
PvT=1/EVF �� pA �� (VUF-VFL)/(VUF+VBL)
Wherein:
PvT=needs the minimum vacuum level [bar] for bedpan drainage procedure,
The excessive vacuum coefficient of EVF=, selected from the scope of 1-1.5,
If being not filled by residual volume when VUF=transferring box is full, it is preferable that after rinsing recently transferring box be not filled by volume [liter],
The volume [liter] of the bedpan drain line in VBL=bedpan drain valve downstream,
PA=ambient pressure [bar],
The volume [liter] of VFL=flushing water.
7. vacuum closet system according to claim 1,
-wherein, closet control unit is suitable to be programmed for concrete cleaning procedure when installing vacuum closet system by means of user interface, and
-be suitable to after when receiving activation signal by means of user interface in the operation of vacuum closet system start cleaning procedure, described cleaning procedure comprises the following steps:
Control vacuum source to produce vacuum in transferring box,
Flushing water is injected in bedpan, continue in the specific washing time section programmed by means of user interface before, and
Control bedpan drain valve to start to open in later predetermined amount of time to inject at described flushing water.
8. vacuum closet system according to claim 1,
Wherein closet control unit be further adapted for detection bedpan drain valve not fully closed state, and if this not fully closed state be detected, then start cleaning procedure, described cleaning procedure comprises the following steps:
-by least one flushing water nozzle, the flushing water in flush box is injected in bedpan,
-control vacuum source to produce vacuum in transferring box,
-control bedpan drain valve to be switched to open mode from closed mode.
9. vacuum closet system according to claim 8,
Wherein, described closet control unit is suitable to detect in the following manner the not fully closed state of bedpan drain valve:
-read transferring box pressure transducer pressure signal and by described pressure signal with
Vacuum source is activated and compares with the minimum vacuum level of predetermined amount of time after generation vacuum in transferring box, or
The horizontal rate of increase of minimum vacuum being activated after with generation vacuum in transferring box at vacuum source is compared,
-and wherein, it is "Yes" state that described closet control unit is further adapted for the parameter setting of not fully closed state by instruction bedpan drain valve under the following conditions:
If being not reaching to minimum vacuum level within a predetermined period of time, or
Without realizing the horizontal rate of increase of minimum vacuum.
10. vacuum closet system according to claim 8,
Wherein, bedpan drain valve includes valve casing, described valve casing is connected to air pressure source to produce the pressure of projecting pressure in valve casing, and wherein closet control unit is suitable to detect the not fully closed state of bedpan drain valve by monitoring the pressure signal of the bedpan drain valve pressure transducer measuring valve casing internal pressure, and
If wherein the pressure signal of bedpan drain valve pressure transducer is not higher than minimum pressure level, then closet control unit is further adapted for the parameter setting of the not fully closed state by instruction bedpan drain valve in "Yes" state.
11. vacuum closet system according to claim 8,
If wherein closet control unit detects the not fully closed state of bedpan drain valve after described cleaning procedure, then repeat described cleaning procedure,
Wherein closet control unit is further adapted for the number of repetition of cleaning procedure is restricted to predetermined quantity, if and after the cleaning procedure of predetermined quantity has be carried out, closet control unit detects the not fully closed state of bedpan drain valve, then vacuum closet is switched to failure state.
12. for the method controlling the vacuum closet system used in the vehicles, wherein
Carry out the bedpan drainage procedure with the bedpan of bedpan discharge outlet, comprise the following steps:
Controlling vacuum source to produce vacuum inside the transferring box being connected to bedpan discharge outlet by means of bedpan drain line, wherein transferring box is connected to described vacuum source and includes transfer discharge outlet;
Read the pressure sensor signal of transferring box pressure transducer to determine the vacuum level within transferring box;
By pressure sensor signal compared with predetermined vacuum level; And
When pressure sensor signal is lower than predetermined vacuum level, the switchable bedpan drain valve controlling to be arranged in bedpan drain line is to be switched to open mode from closed mode; And
In transfer drainage procedure, by disabling vacuum source, close bedpan drain valve, activating the air pressure source being connected to transferring box to produce the pressure of projecting pressure inside transferring box, to open the changeable transfer drain valve being arranged in transfer drain line to open transfer drain line, the waste water in transferring box is transferred to the waste water tank being connected to transfer discharge outlet by means of transfer drain line.
13. method according to claim 12,
Wherein, described transfer drainage procedure comprises the following steps:
-disabling vacuum source,
-close bedpan drain valve,
-control air pressure source to produce pressure in transferring box,
-to be controlled in transferring box in air pressure source producing the certain delay after pressure, open transfer drain valve,
Wherein said delay realizes by reading the pressure sensor signal of transfer pressure transducer, compared with predetermined stress level and when reaching predetermined stress level, pressure sensor signal being opened transfer drain valve at once;Or, by transfer drainage procedure, the waste water in transferring box is transferred in waste water tank, and is controlled in transferring box to produce the predetermined amount of time after pressure in air pressure source and opens transfer drain valve and realize.
14. method according to claim 13,
Wherein, it is not less than predetermined vacuum level is switched on if described closet control unit is further adapted for being controlled in transferring box to produce the predetermined amount of time pressure sensor signal after vacuum at vacuum source,
Wherein said transfer drainage procedure preferably corresponds to the transfer drainage procedure described in claim 2.
15. method according to claim 13,
Wherein, if if having proceeded by the bedpan drainage procedure of predetermined quantity from last transfer drainage procedure or content horizon sensor indicates the content of predeterminated level in transferring box, then opening described transfer drainage procedure.
16. method according to claim 12,
Further comprising the steps of:
Specific washing time section is programmed by means of user interface when vacuum closet is installed, and
Afterwards in the operation of vacuum closet, starting cleaning procedure when receiving activation signal by means of user interface, described cleaning procedure comprises the following steps:
Control vacuum source to produce vacuum in transferring box, flushing water is injected in bedpan and continues described predetermined washing time section, and in the predetermined amount of time that described flushing water injects after starting, control bedpan drain valve to open.
17. method according to claim 12,
Further comprising the steps of:
The not fully closed state of detection bedpan drain valve, and
If be detected that this not fully closed state then starts cleaning procedure, described cleaning procedure comprises the following steps:
By at least one flushing water nozzle, flushing water is injected into bedpan from flush box, controls vacuum source to produce vacuum in transferring box, to control bedpan drain valve to be switched to open mode from closed mode.
18. method according to claim 17,
Wherein, compared with reading the pressure signal of transferring box pressure transducer the minimum vacuum level of predetermined amount of time that is activated by described pressure signal after with generation vacuum in transferring box with vacuum source, or it is activated compared with producing the horizontal rate of increase of minimum vacuum after vacuum in transferring box, to detect the described not fully closed state of bedpan drain valve with at vacuum source;
And if be wherein not reaching to minimum vacuum level within a predetermined period of time, or without realizing the horizontal rate of increase of minimum vacuum, then the parameter setting by the not fully closed state of instruction bedpan drain valve is "Yes" state.
19. method according to claim 17,
Wherein, described bedpan drain valve includes the valve casing being connected to air pressure source, and produces the pressure of projecting pressure inside valve casing, and the not fully closed state of wherein bedpan drain valve detects in the following manner:
The pressure signal of the bedpan drain valve pressure transducer of valve casing internal pressure is measured in monitoring, and
If the pressure signal of bedpan drain valve pressure transducer is not more than minimum pressure level, then the parameter setting by the not fully closed state of instruction bedpan drain valve is "Yes" state.
20. method according to claim 17,
Further comprising the steps of:
If after described cleaning procedure, closet control unit detects the not fully closed state of bedpan drain valve, then repeat described cleaning procedure;
By the time number limiting of cleaning procedure repetition to pre-determined number;And
After the cleaning procedure having carried out described pre-determined number, if closet control unit detects the not fully closed state of bedpan drain valve, then vacuum closet is switched to failure state.
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| CN105644463B (en) | 2021-10-29 |
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Effective date of registration: 20220425 Address after: German Weddle Patentee after: Evac Co.,Ltd. Address before: 124 Field Road, Weddell 22880, Germany Patentee before: YIWEIKE Co.,Ltd. |