CN208791317U - Fluid filtering device and water purifier - Google Patents
Fluid filtering device and water purifier Download PDFInfo
- Publication number
- CN208791317U CN208791317U CN201821192268.XU CN201821192268U CN208791317U CN 208791317 U CN208791317 U CN 208791317U CN 201821192268 U CN201821192268 U CN 201821192268U CN 208791317 U CN208791317 U CN 208791317U
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- Prior art keywords
- water
- fluid
- filtering device
- tds
- fluid filtering
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 182
- 239000012530 fluid Substances 0.000 title claims abstract description 104
- 238000001914 filtration Methods 0.000 title claims description 57
- 239000008213 purified water Substances 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 11
- 238000001223 reverse osmosis Methods 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 239000002351 wastewater Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 244000261422 Lysimachia clethroides Species 0.000 description 5
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011403 purification operation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000009298 Trigla lyra Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a fluid filter equipment and purifier that contains this fluid filter equipment relates to water purification unit technical field, has solved the technical problem that several cups of water TDS was high before when the purifier was shut down and was fetched water again. This fluid filter equipment includes TDS filter equipment, purified water supply pipeline and pipeline switching device, TDS filter equipment links to each other with this fluid filter equipment's fluid entry through pipeline switching device after parallelly connected with the influent stream mouth between them of purified water supply pipeline, TDS filter equipment links to each other with this fluid filter equipment's fluid outlet after parallelly connected with the effluent stream mouth between them of purified water supply pipeline, pipeline switching device can select TDS filter equipment and purified water supply pipeline one of them influent stream mouth and fluid filter equipment's fluid inlet to switch on. The utility model discloses when having reduced the water purifier and having shut down the water intaking again, the life of resin filter core is effectively prolonged to several cups of water TDS height in the front.
Description
Technical field
The utility model relates to purifier technical fields, more particularly, to a kind of fluid filtering device and include the fluid
The water purifier of filter device.
Background technique
For reverse osmosis water purifier, former glasss of water TDS contents when fetching water that there is a problem of being switched on again after shutting down for a long time are high,
The main reason for phenomenon occur is that phenomenon of osmosis has occurred in reverse osmosis membrane, causes inorganic ion to enter across film reverse osmosis
It produces in water.TDS (total dissolved solid), also known as dissolvability solid amount show solid dissolved with how many milligrams of dissolubilities in 1 liter of water
Body.TDS value is higher, indicates that the dissolved matter contained in water is more.In order to solve this problem, have in the prior art a kind of using pure water
Displacement is due to the high water of caused TDS content and carrying out emission treatment after shutting down, but the program is the problem is that displacement
Water direct emission, causes water resource waste；There is also one kind in the prior art is made by the way that resin filter element is added in water circuit system
Former glasss of water TDS problems are handled for TDS filter device, although avoiding water resource waste phenomenon, resin in contrast
Filter core, which is located at, to be produced on water route, is also swapped for normally producing water, is equivalent to and flogs a dead horse, followed by waterpower constant impingement
Under, it easily causes resin damaged, physical resin life is caused to be decayed.In view of the above-mentioned problems, providing one kind in the utility model
Both it can solve the problem of former glasss of water TDS high when fetching water again after shutting down, while can accomplish not waste water resource, extension resin
The technical solution of filter core service life.
Utility model content
The purpose of this utility model is to provide fluid filtering device and comprising the water purifier of the fluid filtering device, with solution
The technical problem of former glasss of water TDS high when water purifier certainly existing in the prior art is fetched water again after shutting down.
To achieve the above object, the utility model provides following technical scheme:
Fluid filtering device provided by the utility model, including TDS filter device, purified water water supply pipe and pipeline are cut
Changing device, in which:
Switched after the TDS filter device is in parallel with the flow inlet of both purified water water supply pipes by the pipeline
Device is connected with the fluid inlet of the fluid filtering device, both the TDS filter device and described purified water water supply pipe
It is connected after outflow port is in parallel with the fluid outlet of the fluid filtering device, the pipeline reversing service can select the TDS to filter
One of them flow inlet of both device and described purified water water supply pipe is connected with the fluid inlet of the fluid filtering device.
The pipeline reversing service includes being separately positioned on the TDS filtering as a further improvement of the utility model,
The first solenoid valve and second solenoid valve at the flow inlet of the flow inlet of device and the purified water water supply pipe.First electricity
Magnet valve and the switch state of the second solenoid valve are opposite.
The pipeline reversing service includes three-way magnetic valve as a further improvement of the utility model, and described three are powered
Three connectors of magnet valve are supplied with the fluid inlet of the fluid filtering device, the TDS filter device and the purified water respectively
The flow inlet of water lines is connected.
The outflow port of the TDS filter device and the fluid filtering device as a further improvement of the utility model,
Check valve is provided between fluid outlet, which allows fluid to flow to the fluid from the outflow port of the TDS filter device
The fluid outlet of filter device.
The TDS filter device is mixed-bed resin filter core as a further improvement of the utility model,.
It as a further improvement of the utility model, further include pretreatment system, booster pump and the reverse osmosis membrane filtration of connection
Core, the water purification outlet of the reverse osmosis membrane filter element are connected with the fluid inlet of fluid filtering device, and the pretreatment system passes through
The booster pump is connected with the raw water inlet of the reverse osmosis membrane filter element.
The wastewater outlet of the reverse osmosis membrane filter element is equipped with concentrated water solenoid valve as a further improvement of the utility model,
Discharge pipe line, be simultaneously connected to waste water ratio solenoid valve by the concentrated water solenoid valve.
It as a further improvement of the utility model, further include postposition filter core, the inlet and the stream of the postposition filter core
The fluid outlet of body filter device is connected, and the liquid outlet of the postposition filter core is connected with downstream water demand equipment.Watering equipment is goose
Neck faucet.
A kind of water purifier provided by the utility model, including the fluid filtering device and controller, the controller
The pipeline reversing service movement can be controlled to realize the selection of fluid communication access in the fluid filtering device.
The water purifier tool is respectively continuous water intaking mould there are three types of operational mode as a further improvement of the utility model,
Formula, interruption water taking mode and shutdown restarting mode.
The continuous water taking mode was water intaking time interval less than 30 minutes as a further improvement of the utility model,
The method of operation；The interruption water taking mode is the method for operation that water intaking interval is greater than 30 minutes；The shutdown restarting mode is
Be switched on the method for operation of fetching water again after power-off.It is switched on again after power-off and is defined as being interrupted water taking mode in the controller when fetching water.
The water purifier is reverse osmosis water purifier as a further improvement of the utility model,.
The utility model additionally provides a kind of method for reducing water outlet TDS using the fluid filtering device, including as follows
Step:
Step A: starting fluid filtering device, when the fluid TDS high of entrance needs to filter, pipeline reversing service control stream
Body enters in TDS filter device be filtered after convey；
Step B: step A run to after setting time enter fluid filtering device fluid inlet fluid TDS it is up to standard when,
Pipeline reversing service switches over and controls fluid and enter in purified water water supply pipe and conveyed；
Step C: when the fluid TDS of entrance is up to standard does not need filtering, pipeline reversing service control fluid enters purification
It is conveyed in water water supply pipe.
The utility model additionally provides a kind of method for reducing the purifier water outlet TDS, includes the following steps:
Step A: the control signal of corresponding described three kinds of operational modes of water purifier is preset in the controller；
Step B: start the water purifier and start to carry out water purification operation；
Step C: the controller judges the water purifier operational mode: receiving the increasing by the controller
The working state signal of press pump realizes the judgement of operational mode；When the booster pump stops working, signal feeds back to the control
Device, the controller start timing, until the booster pump starts when fetching water again, when the controller is according to this interval next time
Between judge the water purifier operational mode, and according to the different control signals controls of the different operational modes of preset correspondence
Pipeline reversing service movement realizes that water route changes, while the timing in the controller is reset, and waits the booster pump next time
Start timing when stopping again；
Step D: when water purifier operational mode is continuous water taking mode: water purifier carry out it is normal produce water, controller control the
Two solenoid valves are closed, and the first solenoid valve is opened；Water flow successively passes through pretreatment system-booster pump-reverse osmosis membrane filter element-the at this time
One solenoid valve-postposition filter core-gooseneck faucet；
When water purifier operational mode is interruption water taking mode or shuts down restarting mode: purifier water outlet need to be filtered through TDS and be filled
Purification is set, is divided into the operation of two steps at this time:
It is closed step 1: controller controls the first solenoid valve, second solenoid valve is opened, and water flow trend is pretreatment system at this time
System-booster pump-reverse osmosis membrane filter element-second solenoid valve-TDS filter device-check valve-postposition filter core-gooseneck faucet；
Step 2: controller controls the unlatching of the first solenoid valve after the first step is run 30 seconds, second solenoid valve is closed, at this time
Flow direction flows to identical when being in normal production water with water purifier.
Water route in parallel is arranged in the utility model after reverse osmosis membrane filter element, normally water processed and is shut down again by solenoid valve control
Water route is moved towards when water intaking, can effectively solve former glasss of water when the reverse osmosis water purifier interval water intaking time is long or shutdown is fetched water again
The problem of TDS high has help to former glasss of water effluent quality improvement.
The utility model has the following beneficial effects:
1) the utility model increases a resin filter element in reverse osmosis water circuit system, it can be achieved that high in former glasss of water water
TDS is removed, and improves effluent quality；
2) the utility model can be according to water purifier shutdown and open state by the solenoid valve being arranged after reverse osmosis membrane
The switching for controlling water route effectively extends the service life of resin filter element while may be implemented to improve former glasss of water TDS.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the system flow chart of the first embodiment of the filtration system of the utility model water purifier；
Fig. 2 is the system flow chart of second of embodiment of the filtration system of the utility model water purifier.
1, pretreatment system in figure；2, booster pump；3, reverse osmosis membrane filter element；4, waste water ratio solenoid valve；5, concentrated water electromagnetism
Valve；6, the first solenoid valve；7, second solenoid valve；8, mixed-bed resin filter core；9, check valve；10, postposition filter core；11, gooseneck faucet；
12, three-way magnetic valve；13, purified water water supply pipe；14, flow inlet；15, fluid inlet；16, outflow port；17, fluid outlet；
18, water purification outlet；19, raw water inlet；20, wastewater outlet；21, inlet；22, liquid outlet.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
As shown in Figure 1, the utility model provides a kind of fluid filtering device, including TDS filter device, purified water supply water
Pipeline 13 and pipeline reversing service pass through after TDS filter device is in parallel with the flow inlet 14 of both purified water water supply pipes 13
Pipeline reversing service is connected with the fluid inlet 15 of the fluid filtering device, TDS filter device with 13 liang of purified water water supply pipe
It is connected after 16 parallel connection of outflow port of person with the fluid outlet 17 of the fluid filtering device, pipeline reversing service can select TDS to filter
The flow inlet 14 of one of both device and purified water water supply pipe 13 and the fluid inlet 15 of fluid filtering device are connected.
In the utility model, TDS filter device is mixed-bed resin filter core 8.
It is provided with check valve 9 between the outflow port 16 of mixed-bed resin filter core 8 and the fluid outlet 17 of the fluid filtering device,
The check valve 9 permission fluid flows to the fluid outlet 17 of the fluid filtering device from the outflow port 16 of mixed-bed resin filter core 8.
Further include fluid filtering device upstream is set and sequentially connected pretreatment system 1, booster pump 2 and reverse osmosis
Permeable membrane filter core 3, the water purification outlet 18 of reverse osmosis membrane filter element 3 are connected with the fluid inlet 15 of fluid filtering device, pretreatment system
1 is connected by booster pump 2 with the raw water inlet 19 of reverse osmosis membrane filter element 3.The wastewater outlet 20 of reverse osmosis membrane filter element 3 is equipped with dense
The discharge pipe line of water solenoid valve 5,5 side of concentrated water solenoid valve are simultaneously connected to waste water ratio solenoid valve 4.It further include being arranged in the filtering flow
The postposition filter core (10) in device downstream, the inlet 21 of postposition filter core 10 are connected with the fluid outlet 17 of the fluid filtering device,
The liquid outlet 22 of postposition filter core 10 is connected with downstream water demand equipment.In the utility model, watering equipment is gooseneck faucet 11.
Embodiment 1:
As shown in Figure 1, pipeline reversing service includes the first solenoid valve 6 and second solenoid valve 7, the setting of the first solenoid valve 6 exists
At the flow inlet 14 of purified water water supply pipe 13, second solenoid valve 7 is arranged at the flow inlet 14 of mixed-bed resin filter core 8.When need
When carrying out TDS processing to former glasss of water, the first solenoid valve 6 is closed, second solenoid valve 7 is opened, so that from reverse osmosis
The contaminated water that the water purification outlet 18 of membrane filter 3 comes out reaches at gooseneck faucet 11 after the processing of mixed-bed resin filter core 8 for drink
With.The first solenoid valve 6 is opened when the water TDS qualification that reverse osmosis membrane filter element 3 comes out after handling a period of time, second solenoid valve
7 close, so that water purifying direct was connected purified water water supply pipe 13 and reached at gooseneck faucet 11 for drinking；The above structure design is not only
The problem that can solve former glasss of water TDS high when fetching water again after shutting down, can accomplish not waste water resource；It simultaneously can be without auxiliary
Mixed-bed resin filter core 8 is cut off when purification, for re-filtering in resin filter element, extension is all flowed into without all water up to standard
Resin filter element service life.
Embodiment 2:
As shown in Fig. 2, embodiment 2 and the difference of embodiment 1 are only that, pipeline reversing service includes three-way magnetic valve 12,
Three connectors of three-way magnetic valve 12 respectively with the fluid inlet of the fluid filtering device 15, TDS filter device and purified water
The flow inlet 14 of water supply pipe is connected.It designs through the above structure and two solenoid valves is changed to a three-way magnetic valve realization, subtract
Few number of devices, simplied system structure.
The utility model additionally provides a kind of water purifier, including fluid filtering device and controller, and controller can be controlled
The movement of tubulation circuit switching device is to realize the selection of fluid communication access in fluid filtering device.Water purification in the utility model
Machine is reverse osmosis water purifier.Wherein, there are three types of operational mode, respectively continuous water taking modes, interruption water taking mode for water purifier tool
With shutdown restarting mode.According to the corresponding control signal of water intaking interval time presetting three kinds of operational modes in controller, and root
Switch according to the first solenoid valve of control signal control 6 and the open and-shut mode of second solenoid valve 7.
In the utility model, continuous water taking mode is the water intaking method of operation of the time interval less than 30 minutes；Interruption water intaking
Mode is the method for operation that water intaking interval is greater than 30 minutes；Shutting down restarting mode is the method for operation of fetching water that is switched on again after powering off.Control
Device processed can carry out the switching in water purification water route according to different operational modes, realize and effectively extend tree while improving former glasss of water TDS
The service life of rouge filter core.
The utility model additionally provides a kind of method for reducing water outlet TDS using fluid filtering device, includes the following steps:
Step A: starting fluid filtering device, when the fluid TDS high of entrance needs to filter, pipeline reversing service control stream
Body enters in TDS filter device be filtered after convey；
Step B: step A run to after setting time enter fluid filtering device fluid inlet 15 fluid TDS it is up to standard
When, pipeline reversing service switches over and controls fluid and enter in purified water water supply pipe 13 and conveyed；
Step C: when the fluid TDS of entrance is up to standard does not need filtering, pipeline reversing service control fluid enters purification
It is conveyed in water water supply pipe 13.
The utility model additionally provides a kind of method for reducing purifier water outlet TDS, includes the following steps:
Step A: the control signal of corresponding three kinds of operational modes of water purifier is preset in controller；
Step B: starting water purifier starts to carry out water purification operation；
Step C: controller judges water purifier operational mode: the working condition of booster pump 2 is received by controller
The judgement of signal realization operational mode；When booster pump 2 stops working, signal feeds back to controller, and controller starts timing, until
Booster pump 2 starts next time when fetching water again, and controller judges water purifier operational mode according to this interval time, and according to pre-
If the different control signal control piper switching devices movements of the different operational modes of correspondence realize that water routes change, while controller
In timing reset, wait next time booster pump 2 stop when starting timing again；
Step D: when water purifier row mode is continuous water taking mode: water purifier carries out normal production water, controller control second
Solenoid valve 7 is closed, and the first solenoid valve 6 is opened；Water flow successively passes through pretreatment system 1- booster pump 2- reverse osmosis membrane filter element at this time
3- the first solenoid valve 6-postposition filter core 10- gooseneck faucet 11；
When water purifier operational mode is interruption water taking mode or shuts down restarting mode: purifier water outlet need to be filtered through TDS and be filled
Purification is set, is divided into the operation of two steps at this time:
It is closed step 1: controller controls the first solenoid valve 6, second solenoid valve 7 is opened, and water flow trend is pretreatment at this time
System 1- booster pump 2- reverse osmosis membrane filter element 3- second solenoid valve 7-TDS filter device-check valve 9- postposition filter core 10- gooseneck dragon
First 11；
Step 2: controller controls the unlatching of the first solenoid valve 6 after the first step is run 30 seconds, second solenoid valve 7 is closed,
It is flowed to when flow direction is in normal production water with water purifier at this time identical.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (12)
1. a kind of fluid filtering device, it is characterised in that: including TDS filter device, purified water water supply pipe (13) and pipeline
Switching device, in which:
Pass through the pipeline after the TDS filter device is in parallel with flow inlet (14) of both purified water water supply pipes (13)
Switching device is connected with the fluid inlet (15) of the fluid filtering device, the TDS filter device and the purified water water supplying pipe
It is connected after the outflow port (16) on both roads (13) is in parallel with the fluid outlet (17) of the fluid filtering device, the pipeline switching dress
Set can select both described TDS filter device and described purified water water supply pipe (13) one of them flow inlet (14) with it is described
The fluid inlet (15) of fluid filtering device is connected.
2. fluid filtering device according to claim 1, it is characterised in that: the pipeline reversing service includes being respectively set
The first electromagnetism at the flow inlet (14) of the TDS filter device and the flow inlet (14) of the purified water water supply pipe (13)
Valve (6) and second solenoid valve (7).
3. fluid filtering device according to claim 1, it is characterised in that: the pipeline reversing service includes threeway electromagnetism
Valve (12), three connectors of the three-way magnetic valve (12) respectively with the fluid inlet of the fluid filtering device (15), described
TDS filter device is connected with the flow inlet (14) of the purified water water supply pipe (13).
4. fluid filtering device according to claim 2, it is characterised in that: the outflow port (16) of the TDS filter device
Check valve (9) are provided between the fluid outlet (17) of the fluid filtering device, which allows fluid from described
The outflow port (16) of TDS filter device flows to the fluid outlet (17) of the fluid filtering device.
5. fluid filtering device according to claim 1, it is characterised in that: the TDS filter device is mixed-bed resin filter
Core (8).
6. fluid filtering device according to claim 2, it is characterised in that: further include the pretreatment system (1) of connection, increase
Press pump (2) and reverse osmosis membrane filter element (3), the stream of water purification outlet (18) and fluid filtering device of the reverse osmosis membrane filter element (3)
Body entrance (15) is connected, the raw water that the pretreatment system (1) passes through the booster pump (2) and the reverse osmosis membrane filter element (3)
Entrance (19) is connected.
7. fluid filtering device according to claim 6, it is characterised in that: the waste water of the reverse osmosis membrane filter element (3) goes out
Mouth (20) is equipped with the discharge pipe line of concentrated water solenoid valve (5), and the concentrated water solenoid valve (5) is other to be simultaneously connected to waste water ratio solenoid valve (4).
8. fluid filtering device according to claim 1, it is characterised in that: further include postposition filter core (10), the postposition
The inlet (21) of filter core (10) is connected with the fluid outlet (17) of the fluid filtering device, and the postposition filter core (10) goes out liquid
Mouth (22) is connected with downstream water demand equipment.
9. a kind of water purifier, it is characterised in that: including fluid filtering device a method as claimed in any one of claims 1-8 and control
Device, the controller can control the movement of the pipeline reversing service to realize fluid communication in the fluid filtering device
The selection of access.
10. water purifier according to claim 9, it is characterised in that: there are three types of the water purifier tools, and operational mode is respectively
Continuous water taking mode, interruption water taking mode and shutdown restarting mode.
11. water purifier according to claim 10, it is characterised in that: the continuous water taking mode is that water intaking time interval is small
In 30 minutes methods of operation；The interruption water taking mode is the method for operation that water intaking interval is greater than 30 minutes；The shutdown weight
Mode is opened as the method for operation of fetching water that is switched on again after power-off.
12. water purifier according to claim 9, it is characterised in that: the water purifier is reverse osmosis water purifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821192268.XU CN208791317U (en) | 2018-07-25 | 2018-07-25 | Fluid filtering device and water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821192268.XU CN208791317U (en) | 2018-07-25 | 2018-07-25 | Fluid filtering device and water purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208791317U true CN208791317U (en) | 2019-04-26 |
Family
ID=66203414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821192268.XU Active CN208791317U (en) | 2018-07-25 | 2018-07-25 | Fluid filtering device and water purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208791317U (en) |
-
2018
- 2018-07-25 CN CN201821192268.XU patent/CN208791317U/en active Active
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