CN105672180B - The control method and its control device, dust arrester and sweeper of dedusting switching - Google Patents
The control method and its control device, dust arrester and sweeper of dedusting switching Download PDFInfo
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- CN105672180B CN105672180B CN201410817808.9A CN201410817808A CN105672180B CN 105672180 B CN105672180 B CN 105672180B CN 201410817808 A CN201410817808 A CN 201410817808A CN 105672180 B CN105672180 B CN 105672180B
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- 239000000428 dust Substances 0.000 title claims abstract description 42
- 241001417527 Pempheridae Species 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010408 sweeping Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 description 13
- 238000001914 filtration Methods 0.000 description 11
- 238000005453 pelletization Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 208000024780 Urticaria Diseases 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a kind of control method of dedusting switching and its control device, dust arrester and sweeper.Wherein, the control method of dedusting switching, comprises the following steps：Sweeper is set to sweep pattern in dry；Real-time pressure in the air channel in the filter vat downstream for obtaining sweeper；Determine whether sweeper switches to according to real-time pressure and wet sweep pattern.Technical scheme efficiently solves the problem of filter vat judgment of clogging difficulty causes the parts damages such as air channel and dustbin in the prior art.
Description
Technical field
The present invention relates to refuse sweeping technical field, the control method switched in particular to a kind of dedusting, dedusting are cut
The control device and sweeper changed.
Background technology
Dry type road sweeper is not sprayed or sprayed water dust pelletizing system, is swept pattern with dry and wet is swept two kinds of Working moulds of pattern
Formula.Pattern is swept using dry under the drying condition of road surface, pattern is swept in road surface under conditions of moistening using wet.
Fig. 7 shows the internal structure schematic diagram of dry type road sweeper of the prior art.As shown in fig. 7, being swept dry
Under pattern, dust enters the Chalk-dust filtering of filter vat 3 ' after dustbin is settled for the first time through air channel.It is applied to rain in wet pattern of sweeping
Under conditions of it or surface humidity are very high.Under above-mentioned condition, large quantity of moisture is contained in gas, dust becomes mud through being combined with water
Soil, equivalent to depositing dust.All it is clean gas when after being settled through dustbin into air channel.So carrying the air of dust only needs
To be settled in dustbin, it is not necessary to pass through filter vat Chalk-dust filtering.
In dry filter vat of sweeping under pattern because air channel and dustbin can be damaged after dust is excessive or other reasons result in blockage.This
When need to be switched to and wet sweep pattern, protection dustbin and air channel.
But, it is in the prior art, dry to sweep pattern and the wet switching for sweeping pattern enters pedestrian according to weather or ambient conditions
For selection.By controlling the switching of air door, the switching of dry and wet pattern is realized.Whether filter vat blocks can not judge substantially, or
Can only be judged by the experience of operator, if filter vat blocking when can not carry out in time pattern switching can cause air channel and
The damage of dustbin.
The content of the invention
The present invention is intended to provide the control method and its control device, dust arrester and sweeper of a kind of dedusting switching,
To solve the problem of filter vat judgment of clogging difficulty causes the parts damages such as air channel and dustbin in the prior art.
To achieve these goals, according to an aspect of the invention, there is provided a kind of control method of dedusting switching, bag
Include following steps：Sweeper is set to sweep pattern in dry；Real-time pressure in the air channel in the filter vat downstream for obtaining sweeper；According to
Real-time pressure determines whether sweeper switches to and wet sweeps pattern.
Further, determine whether sweeper switches to the wet pattern of sweeping and comprise the following steps according to real-time pressure：When real-time
When pressure is less than first predetermined value, progress is dry to sweep pattern；When real-time pressure is more than second predetermined value, progress is wet to sweep pattern, its
In, second predetermined value is more than or equal to first predetermined value.
Further, when real-time pressure is more than second predetermined value and more than first scheduled time, progress is wet to sweep pattern.
Further, second predetermined value is more than first predetermined value；Determine whether sweeper switches to according to real-time pressure wet
Sweep pattern further comprising the steps of：When real-time pressure is between first predetermined value and second predetermined value, alarmed.
Further, when real-time pressure is between first predetermined value and second predetermined value and more than second scheduled time,
Alarmed.
Further, when real-time pressure is between first predetermined value and second predetermined value, progress is dry to sweep pattern.
According to another aspect of the present invention there is provided a kind of control device of dedusting switching, including：Pressure sensor, if
Put in the air channel in filter vat downstream, the real-time pressure in air channel for obtaining filter vat downstream；Controller, with pressure sensing
Device is connected, and wet pattern is swept for determining whether sweeper switches to according to real-time pressure；Air door is opened and closed executing agency, with controller
Connection be determined to switch to it is wet sweep pattern when control air door.
Further, control device also includes alarm, is connected with controller.
According to another aspect of the present invention there is provided a kind of dust arrester, including dustbin, it is arranged on dustbin porch
Suction nozzle, blower fan, filter vat and air door, dust arrester also include pressure sensor, controller and air door opening and closing execution machine
Structure, blower fan is connected with dustbin by air channel and air channel is produced negative pressure, and filter vat, pressure sensor and air door opening and closing are performed
Mechanism is arranged in air channel, and pressure sensor is arranged on the downstream of filter vat, the reality in air channel for obtaining filter vat downstream
When pressure, controller is connected with pressure sensor, and wet pattern, wind are swept for determining whether sweeper switches to according to real-time pressure
Door opening and closing executing agency be connected with controller be determined to switch to it is wet sweep pattern when control air door.
Further, air door be included in it is dry sweep pattern open and it is wet sweep pattern closing the first air door and sweep pattern wet
Open and dry the second air door for sweeping pattern closing.
Further, air channel includes airintake wind-tunnel and exhaust duct, and airintake wind-tunnel is formed at entering for dustbin and filter vat
Between mouthful, exhaust duct is formed between the first air door and the second air door and the air inlet of blower fan, and the second air door can when opening
Dustbin and exhaust duct are connected, the first air door can connect outlet and the exhaust duct of filter vat when opening.
Further, pressure sensor is arranged between the outlet of filter vat and the first air door.
According to another aspect of the present invention there is provided a kind of sweeper, including above-mentioned dedusting switching control device and/
Or above-mentioned dust arrester.
Apply the technical scheme of the present invention, in dry filter vat of sweeping under pattern because dust is excessive or other reasonses result in blockage
Afterwards, because air can not by or only a small amount of air can pass through filter vat.It can so cause to bear in the air channel in filter vat downstream
Pressure increase.Real-time pressure in air channel of the technical scheme of the present embodiment by obtaining filter vat downstream can be known under filter vat
The pressure change in urticaria road.And then may determine that whether filter vat blocks.So, can be according to the pressure change to cleaning modes
Switch over, such as when real-time pressure is up to or over a certain preset value, sweep pattern switching by dry into wet and sweep pattern.So
The parts such as air channel and dustbin can effectively be protected, it is to avoid parts damages caused by negative pressure is excessive.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the schematic flow sheet of the embodiment of the control method switched according to the dedusting of the present invention；
Fig. 2 shows the part-structure schematic diagram of the dust pelletizing system of Fig. 1 control method control；
Fig. 3 shows the filter vat and the structural representation in air channel downstream of Fig. 2 dust pelletizing system；
Fig. 4 shows the first air door of Fig. 2 dust pelletizing system and the structural representation of the second air door；
Fig. 5 shows the schematic flow sheet of the preferred embodiment of the control method switched according to the dedusting of the present invention；
Fig. 6 shows the connection diagram of the control system switched according to the dedusting of the present invention；And
Fig. 7 shows the internal structure schematic diagram of dry type road sweeper of the prior art.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
1 ', dust cleaning case；3 ', filter vat；1st, dust cleaning case air inlet；2nd, charge air flow air channel；3rd, filter vat；4th, air filtering is crossed
Air channel；5th, the first air door；6th, exhaust duct；7th, air inlet；8th, the second air door.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The default mode of operation of sweeper is dry to sweep pattern.In this mode, by blower fan by air channel when sweeper works
Middle air is extracted out so that air channel produces negative pressure, such dusty gas will atmospheric pressure the air inlet for acting through dust cleaning case
Mouth enters air channel.When dusty gas is by filter vat, dust is stayed in filter vat, and the gas after filtering is through the first air door and wind
Machine discharges air channel.
As shown in figure 1, the embodiment of the control method switched according to the dedusting of the application comprises the following steps：
Sweeper is set to sweep pattern in dry；
Real-time pressure in the air channel in the filter vat downstream for obtaining sweeper；
Determine whether sweeper switches to according to real-time pressure and wet sweep pattern.
Using the technical scheme of the present embodiment, it is dry sweep pattern under filter vat because dust is excessive or other reasonses result in blockage
Afterwards, because air can not by or only a small amount of air can pass through filter vat.It can so cause to bear in the air channel in filter vat downstream
Pressure increase.Real-time pressure in air channel of the technical scheme of the present embodiment by obtaining filter vat downstream can be known under filter vat
The pressure change in urticaria road.And then may determine that whether filter vat blocks.So, can be according to the pressure change to cleaning modes
Switch over, such as when real-time pressure is up to or over a certain preset value, sweep pattern switching by dry into wet and sweep pattern.So
The parts such as air channel and dustbin can effectively be protected, it is to avoid parts damages caused by negative pressure is excessive.
In the control method of the present embodiment, cleaning modes include dry sweeping pattern and wet sweeping pattern.According to real-time pressure
Determine that cleaning modes comprise the following steps：
When real-time pressure is less than first predetermined value, progress is dry to sweep pattern；
When real-time pressure is more than second predetermined value, progress is wet to sweep pattern,
Wherein, second predetermined value is more than or equal to the first preset value.
First and second predetermined value has relation with the structure of dust pelletizing system, it is necessary to which actual tests are demarcated.
Preferably, when real-time pressure is more than second predetermined value and more than first scheduled time, progress is wet to sweep pattern.First
The scheduled time can be demarcated according to actual conditions, and the different structure time of filter vat can be different, and first scheduled time is preferred
For 3S.When real-time pressure is more than second predetermined value and is no more than for first scheduled time, sweeper can be made to be maintained at dry and sweep mould
Formula.The accuracy of pattern switching can so be improved, it is to avoid the switching brought because other reasonses cause pressure short-time fluctuations is wrong
By mistake the problem of.
In the control method of the present embodiment, second predetermined value is more than the first preset value.
Determine that cleaning modes are further comprising the steps of according to real-time pressure：
When real-time pressure is between first predetermined value and second predetermined value, alarmed.The alarm is used to point out to operate
Person checks filtration system especially filter vat.
Preferably, when real-time pressure is between first predetermined value and second predetermined value and more than second scheduled time, enter
Row alarm.The accuracy of alarm can so be improved, it is to avoid the false alarm brought because other reasonses cause pressure short-time fluctuations
The problem of.
In the control method of the present embodiment, when real-time pressure is between first predetermined value and second predetermined value and exceedes
During second scheduled time, progress is dry to sweep pattern.In above-mentioned state, it is likely to which the dust accumulation in filter vat is led to a certain amount of
Cause the real-time pressure rise in the air channel in filter vat downstream.But filter vat remains able to normal work, therefore keep dry and sweep pattern
It is constant.If do not safeguarded to filter vat now, with the accumulation of dust, filter vat will be blocked, it is impossible to normally use.Cause
This needs to be alarmed to play suggesting effect to operator.
Present invention also provides a kind of dust arrester, including dustbin, the suction nozzle for being arranged on dustbin porch, blower fan,
Filter vat and air door, dust arrester also include pressure sensor P, controller and air door opening and closing executing agency, and blower fan passes through
Air channel connects with dustbin and air channel is produced negative pressure, and filter vat 3, pressure sensor P and air door opening and closing executing agency are set
In air channel, pressure sensor P is arranged on the downstream of filter vat 3, the real-time pressure in air channel for obtaining the downstream of filter vat 3
Power, controller is connected with pressure sensor P, and wet pattern, air door are swept for determining whether sweeper switches to according to real-time pressure
Opening and closing executing agency be connected with controller be determined to switch to it is wet sweep pattern when control air door.
The dust arrester of the preferred embodiment of the application is described in detail with reference to Fig. 2 to Fig. 5.
As shown in Figures 2 to 4, dust arrester includes following structure：
Dust cleaning case air inlet 1：Air intake after the preliminary dirt drop of dustbin；
Airintake wind-tunnel 2：Between the entrance for being formed at dustbin and filter vat 3, air channel after dirt drop；
Filter vat 3：For filtering dust in air；
Filter air channel 4：Filtered air flows air channel；
First air door 5：Dry to sweep pattern opening, wet to sweep pattern closing, the first air door 5 can connect filter vat 3 when opening
Outlet and exhaust duct；
Exhaust duct 6：Be formed between the first air door 5 and the second air door 8 and the air inlet 7 of blower fan, it is dry sweep or it is wet sweep through
Discharge air channel after dirt drop or filtering；
Air inlet 7；
Second air door 8：Wet to sweep pattern opening, dry to sweep pattern closing, the second air door 8 can connect dustbin and row when opening
Gas air channel；
Pressure sensor P：It is arranged between the outlet of filter vat 3 and the first air door 5, for detecting after filtering in air channel
Pressure.
First air door 5 and the second air door 8 can simultaneously can only be one by same actuating mechanism controls, the first and second air doors
In open mode, another is closed.
After equipment, which enters, sweeps road operation, system default is dry under conditions of operator does not select any cleaning mode sweeps
Pattern.Now the first air door 5 is opened, and the second air door 8 is closed.
Dry to sweep under pattern, the first air door 5 is opened, and the second air door 8 is closed.Air in air channel is extracted out by blower fan work,
So that air channel produces negative pressure, such dusty gas will enter air inlet gas in the dust cleaning case air inlet 1 that acts through of atmospheric pressure
Flow in air channel 2.When dusty gas is by filter vat 3, filtered by filter vat 3, dust is stayed in filter vat 3.After filtering
Gas discharges air channel through the first air door 5, exhaust duct 6 and air inlet 7.
Before pressure judgement is carried out, first judge whether sweeper sweeps pattern in wet, if sweeping pattern, it is necessary to close in wet
Close the first air door 5 and open the second air door 8.If sweeper is to be swept in dry under pattern, then need to carry out pressure judgement.Tool
Body judges flow as shown in figure 5, specific as follows：
Judge whether the real-time pressure in the air channel in filter vat downstream is less than first predetermined value P0.As pressure ＜ P0, dimension
Hold dry pattern of sweeping constant, i.e., the first air door 5 is opened, the second air door 8 is closed.
As pressure >=P0, judge pressure whether in first predetermined value P0 between second predetermined value P1.When pressure is in
When P0 is between P1 and more than the first scheduled time T0, keeps the first and second throttle conditions constant, that is, remain dry and sweep pattern not
Become.Meanwhile, alarmed, remind operator to check filtration system.
When pressure is not at P0 between P1, judge whether pressure is more than second predetermined value P1.As pressure ＞ P1 and surpass
When the second scheduled time T1, system automatically switch to it is wet sweep pattern, close the first air door 5 and open the second air door 8.Meanwhile, carry
Awake operator safeguards dust pelletizing system in time.After negative pressure slowly returns to below normal value P0, keep wet pattern of sweeping constant, to protect
Protect filter vat, air channel and dustbin.
Present invention also provides a kind of control device of dedusting switching, controlled as shown in fig. 6, being switched according to the dedusting of the application
The embodiment of device processed includes：Pressure sensor, controller and air door opening and closing executing agency.Wherein, pressure sensor is set
In the air channel in filter vat downstream, the real-time pressure in air channel for obtaining filter vat downstream.Controller and pressure sensor
Connection, the cleaning modes for determining sweeper according to real-time pressure.Air door opening and closing executing agency be connected with the controller with
Be determined to switch to it is wet sweep pattern when control air door.
In the technical scheme of the present embodiment, obtained by the pressure sensor being arranged in the air channel in filter vat downstream
Real-time pressure at the air channel in lauter tub downstream, and then may determine that whether filter vat blocks.So, it can be become according to real-time pressure
Change is switched over to cleaning modes.
As shown in fig. 6, control device also includes alarm, it is connected with controller.When real-time pressure is in certain predetermined interval
When, controller output alarm signal is alarmed to alarm, alarm.The alarm is used to point out operator to check filtration system
Especially filter vat.
It is (not shown) including above-mentioned according to the embodiment of the sweeper of the application present invention also provides a kind of sweeper
The control device of dry dedusting switching.The sweeper of the present embodiment can automatically switch dry sweep and sweep pattern with wet.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (13)
1. a kind of control method of dedusting switching, it is characterised in that comprise the following steps：
Sweeper is set to sweep pattern in dry；
Real-time pressure in the air channel in the filter vat downstream for obtaining the sweeper；
Determine whether the sweeper switches to according to the real-time pressure and wet sweep pattern.
2. control method according to claim 1, it is characterised in that determine that the sweeper is according to the real-time pressure
It is no to switch to the wet pattern of sweeping and comprise the following steps：
When the real-time pressure is less than first predetermined value, progress is dry to sweep pattern；
When the real-time pressure is more than second predetermined value, progress is wet to sweep pattern,
Wherein, the second predetermined value is more than or equal to the first predetermined value.
3. control method according to claim 2, it is characterised in that when the real-time pressure is more than the second predetermined value
And during more than first scheduled time, progress is wet to sweep pattern.
4. control method according to claim 2, it is characterised in that
The second predetermined value is more than the first predetermined value；
Determine whether the sweeper switches to that wet to sweep pattern further comprising the steps of according to the real-time pressure：
When the real-time pressure is between the first predetermined value and the second predetermined value, alarmed.
5. control method according to claim 4, it is characterised in that when the real-time pressure in the first predetermined value and
During between the second predetermined value and more than second scheduled time, alarmed.
6. the control method according to claim 4 or 5, it is characterised in that when the real-time pressure is predetermined described first
When between value and the second predetermined value, carry out described dry sweeping pattern.
7. a kind of control device of dedusting switching, it is characterised in that including：
In pressure sensor, the air channel for being arranged on filter vat downstream, the real-time pressure in air channel for obtaining filter vat downstream；
Controller, is connected with the pressure sensor, and wet pattern is swept for determining whether sweeper switches to according to real-time pressure；
Air door be opened and closed executing agency, be connected with the controller be determined to switch to it is wet sweep pattern when control air door.
8. control device according to claim 7, it is characterised in that the control device also includes alarm, with control
Device is connected.
9. a kind of dust arrester, including dustbin, the suction nozzle, blower fan, filter vat and the wind that are arranged on the dustbin porch
Door, it is characterised in that the dust arrester also includes pressure sensor (P), controller and air door opening and closing executing agency, described
Blower fan is connected with the dustbin by air channel and the air channel is produced negative pressure, the filter vat (3), the pressure sensor
(P) and the air door opening and closing executing agency be arranged in the air channel, the pressure sensor (P) is arranged on the filter vat
(3) downstream, the real-time pressure in air channel for obtaining filter vat (3) downstream, the controller and the pressure sensor
(P) connect, for according to real-time pressure determine sweeper whether switch to it is wet sweep pattern, the air door opening and closing executing agency and institute
State controller connection be determined to switch to it is wet sweep pattern when control the air door.
10. dust arrester according to claim 9, it is characterised in that the air door is included in dry pattern of sweeping and opened and institute
State wet the first air door (5) for sweeping pattern closing and opened and dry second air door for sweeping pattern closing in the wet pattern of sweeping
(8)。
11. dust arrester according to claim 10, it is characterised in that the air channel includes airintake wind-tunnel (2) and exhaust
Air channel (6), the airintake wind-tunnel (2) is formed between the entrance of the dustbin and the filter vat (3), the exhaust duct
(6) it is formed between first air door (5) and second air door (8) and the air inlet (7) of the blower fan, second wind
Door (8) can connect the dustbin and the exhaust duct when opening, first air door (5) can connect described when opening
The outlet of filter vat (3) and the exhaust duct.
12. dust arrester according to claim 11, it is characterised in that the pressure sensor (P) is arranged on the mistake
Between the outlet of lauter tub (3) and first air door (5).
13. a kind of sweeper, it is characterised in that control device and/or power including the dedusting switching described in claim 7 or 8
Profit requires the dust arrester any one of 9 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817808.9A CN105672180B (en) | 2014-12-24 | 2014-12-24 | The control method and its control device, dust arrester and sweeper of dedusting switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817808.9A CN105672180B (en) | 2014-12-24 | 2014-12-24 | The control method and its control device, dust arrester and sweeper of dedusting switching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105672180A CN105672180A (en) | 2016-06-15 |
| CN105672180B true CN105672180B (en) | 2017-08-08 |
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ID=56958246
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410817808.9A Active CN105672180B (en) | 2014-12-24 | 2014-12-24 | The control method and its control device, dust arrester and sweeper of dedusting switching |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759028A (en) * | 2017-03-31 | 2017-05-31 | 徐州徐工环境技术有限公司 | Sweeping machine refuse disposal installation and sweeping machine |
| CN113737703A (en) * | 2021-10-08 | 2021-12-03 | 徐州徐工环境技术有限公司 | Water spraying and dust falling automatic control method and system of road sweeper and road sweeper |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4007026A (en) * | 1975-08-13 | 1977-02-08 | Fmc Corporation | Compact dust filter system |
| CN201962630U (en) * | 2011-02-21 | 2011-09-07 | 关静雯 | Sweeper with function of filter core protection in damp environment |
| CN202227297U (en) * | 2011-04-19 | 2012-05-23 | 中联重科股份有限公司 | Cleaning truck |
| CN203200703U (en) * | 2013-01-29 | 2013-09-18 | 江苏悦达专用车有限公司 | Wet and dry dual-purpose sweeping vehicle |
| CN203960793U (en) * | 2014-07-16 | 2014-11-26 | 孙同修 | Wet-dry Environmental sanitation cleaning vehicle |
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2014
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| CN105672180A (en) | 2016-06-15 |
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Address after: 410000 Hunan province Changsha hi tech Development Zone, Lin Yulu No. 288 Applicant after: ZOOMLION ENVIRONMENTAL INDUSTRY Co.,Ltd. Applicant after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410013 Changsha province high tech Development Zone, No. 307 South Road, silver basin Applicant before: Changsha Zoomlion Environmental Industry Co.,Ltd. Applicant before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
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