CN212141701U - Water filtering device and water heater using same - Google Patents
Water filtering device and water heater using same Download PDFInfo
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- CN212141701U CN212141701U CN201921923319.6U CN201921923319U CN212141701U CN 212141701 U CN212141701 U CN 212141701U CN 201921923319 U CN201921923319 U CN 201921923319U CN 212141701 U CN212141701 U CN 212141701U
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- filter element
- filtering device
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- water filtering
- element assembly
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 238000001914 filtration Methods 0.000 title claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 238000005192 partition Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 description 12
- 235000020679 tap water Nutrition 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 235000020680 filtered tap water Nutrition 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
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- Water Treatment By Sorption (AREA)
Abstract
The utility model discloses a water filtering device and a water heater using the same, wherein the water filtering device is applied to the water heater and comprises an outer shell and a filter element assembly, the outer shell is provided with an intermediate baffle, the water filtering device further comprises a first interface connecting piece, and the filter element assembly penetrates through the intermediate baffle and is arranged inside the outer shell by being connected with the first interface connecting piece; the outer shell is arranged in the water heater through the first interface connecting piece. After adopting above-mentioned technical scheme, this water filtering device's simple structure, and filter element group spare through first interface connection spare and shell body cooperation, realize quick installation and dismantlement, the customer of being convenient for after pulling down clears up inside the filter element group spare.
Description
Technical Field
The utility model relates to a filter equipment field, it is concrete relates to a water filtering device and use its water heater.
Background
As shown in fig. 1, the water heater in the market at present adopts a simple filtering device to protect a built-in water flow detection device B of the water heater a from being stuck, the mesh number of a used small-sized filter screen C is less than 60, and the water heater can only isolate impurities with the particle size of more than 0.25mm, and cannot effectively isolate harmful substances such as tiny particles, worm eggs and the like in tap water. After the water heater is used for a long time, the small filter screen is easy to block, the flow of tap water is greatly reduced, and the normal use of the water heater is influenced; in addition, the filter screen is fixed in the water inlet joint, so that the assembly, disassembly and cleaning are very inconvenient.
Therefore, some users add a preposed precision filter at the water inlet end A of the water heater, which can further improve the water quality, improve the water flow and facilitate the daily maintenance. However, the pre-precise filter is expensive and requires a water pipe externally connected.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a water filtering device, which can overcome the above drawbacks, and is installed inside a water heater, and is simple in structure and easy to assemble and disassemble.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a water filtering device comprises an outer shell and a filter element assembly, wherein the outer shell is provided with a middle partition plate, the water filtering device further comprises a first interface connecting piece, and the filter element assembly penetrates through the middle partition plate and is arranged inside the outer shell through being connected with the first interface connecting piece; the outer shell is arranged in the water heater through the first interface connecting piece.
In the technical scheme, the filter element assembly comprises a filter element shell and a filter screen, wherein the filter element shell is provided with a filter screen frame, and the filter screen is arranged on the filter screen frame.
In the technical scheme, the filter element assembly comprises a filter element shell, a filter screen and an upper end cover, wherein the filter element shell is provided with a filter screen frame, and the upper end cover is connected with the filter screen frame through a buckle or a thread.
In the technical scheme, the filter element assembly comprises a filter element shell, a filter screen and a lower end cover, wherein the filter element shell is provided with a filter screen frame, and the lower end cover is connected with the filter screen frame through a buckle or a thread.
In the technical scheme, the mesh number of the filter screen is larger than 60 meshes.
In the technical scheme, a linear handle or an annular tooth cap is arranged on the lower end face of the filter element shell.
In the technical scheme, the lower end cover is provided with a linear handle or an annular tooth cap.
In the above technical solution, it further includes a metal filter element assembly, the metal filter element assembly penetrates through the intermediate partition plate and is connected with the first interface connector to be disposed inside the outer casing.
In the technical scheme, the metal filter element assembly comprises a filter element straight pipe, an annular end cover, a circular filter screen and a pressing plate, wherein the annular end cover is arranged at two ends of the filter element straight pipe, the circular filter screen is arranged in the annular end cover, and the pressing plate is pressed tightly the circular filter screen and the circular filter screen are arranged in the annular end cover in a covering mode.
In the technical scheme, the metal filter element component is internally filled with water purification particles.
In the above technical scheme, the metal filter element assembly further comprises a lower end cover, and the lower end cover is arranged at the bottom of the straight filter element pipe and is matched with the first interface connecting piece for installation.
In the technical scheme, the lower end face of the lower end cover is provided with a linear handle or an annular tooth cap.
A water heater comprises the water filtering device.
After adopting above-mentioned technical scheme, this water filtering device's simple structure, and filter element group spare through first interface connection spare and shell body cooperation, realize quick installation and dismantlement, the customer of being convenient for after pulling down clears up inside the filter element group spare.
Drawings
FIG. 1 is a schematic view of a conventional water heater with a small screen at the water inlet end;
fig. 2 is a sectional view of the internal structure of the first embodiment of the present invention;
fig. 3 is a sectional view of the outer casing structure of the first embodiment of the present invention;
FIG. 4 is an exploded view of the outer housing of the first embodiment of the present invention;
FIG. 5 is a sectional view of a filter element assembly according to a first embodiment of the present invention;
FIG. 6 is a schematic view of a second embodiment of the filter element assembly of the present invention with an upper end cap;
fig. 7 is a schematic view of a filter element assembly of a third embodiment of the present invention provided with a lower end cap;
fig. 8 is a schematic view of a fourth embodiment of the invention with a filter element assembly filled with water purification particles;
fig. 9 is a sectional view showing an internal structure of a fifth embodiment of the present invention;
FIG. 10 is a partial sectional view of a fifth embodiment of the present invention employing a metal filter element assembly;
FIG. 11 is a cross-sectional view of a fifth embodiment of the present invention, showing a metal filter element assembly;
FIG. 12 is a sectional view of a fifth embodiment of the present invention, showing a metal filter element assembly;
FIG. 13 is an exploded view of a fifth embodiment of the present invention employing a metal filter element assembly;
FIG. 14 is a schematic view of a first embodiment of the filter assembly of the present invention installed at the water inlet end of a water heater;
FIG. 15 is a schematic view of the first embodiment of the filtering device of the present invention installed at the outlet end of a water heater;
FIG. 16 is a schematic view of the first embodiment of the present invention showing the filter device installed at the water inlet end and the water outlet end of the water heater, respectively;
FIG. 17 is a schematic view of a fifth embodiment of a filter assembly of the present invention installed at the water inlet end of a water heater;
FIG. 18 is a schematic view of a fifth embodiment of the filter assembly of the present invention installed at the outlet end of a water heater;
FIG. 19 is a schematic view of a fifth embodiment of the present invention showing a water filter unit installed at the water inlet end and the water outlet end of a water heater;
fig. 20 is a schematic view showing a part enlarged at position D of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown with reference to fig. 2, the utility model discloses a water filtering device is applied to water heater, and it is including shell body 1 and filter element group spare 2, wherein:
as shown with reference to fig. 3, 4 and 20, the outer casing 1 is a cylindrical hollow casing composed of an upper casing 11, a lower casing 12 and a middle partition 13; wherein the upper case 11 and the lower case 12 are integrally drawn from a metal plate into a hollow bowl shape.
As shown in fig. 3 and 4, the open surface of the bottom of the upper shell 11 is provided with an outer flange 111, and the open surface of the top of the lower shell 12 is provided with a flanging outer flange 121; the middle partition 13 is a circular metal plate, the outer diameter of which is the same as that of the outer flange 111 of the upper shell 11, and a flanged hole 131 is formed in the center of the middle partition 13, and the flanged flange 121 faces upward. The outer flange 121 of the turned edge on the top of the lower shell 12 is attached to the middle partition plate 13, and then is attached and fastened to the outer flange 121 on the bottom of the upper shell 11, and the middle partition plate 13 divides the inner cavity of the outer shell 1 into two parts.
The side of the upper shell 11 is provided with a second interface connector 15, and the sealing surface of the top of the upper shell 11 is provided with a limit press 112. A third interface connector 16 is arranged on the side surface of the lower shell 12, a first interface connector 14 is arranged at the bottom of the lower shell 12, the first interface connector 14 of the outer shell 1 is provided with an outer flange 143, a threaded hole 144 is arranged on the outer flange 143, and an inner hole 141 of the first interface connector 14 is provided with an inner thread 142; the upper shell 11, the lower shell 12, the middle partition plate 13, the first interface connecting piece 14, the third interface connecting piece 16 and the second interface connecting piece 15 of the outer shell 1 are preferably made of stainless steel, and are connected and formed by adopting a brazing process, so that the pressure resistance and the corrosion resistance are met; the limiting pressing 112 of the upper shell 11, the first interface connection piece 14 of the lower shell 12 and the flanging hole 131 of the middle partition plate 13 are all located on the same axis, and the third interface connection piece 16 of the lower shell 12 and the second interface connection piece 15 of the upper shell 11 can be designed to be on the same side or different sides so as to meet the requirement of waterway installation of different types.
As shown in fig. 2 and 5, the filter element assembly 2 includes a filter element housing 21, a filter screen 22, a first seal ring a and a second seal ring b, the filter screen 22 is set in a tubular shape, the filter element assembly 2 is composed of the filter element housing 21 and the filter screen 22, the filter element housing 21 is a cylindrical hollow shell, filter screen frames 211 which are regularly arranged are respectively arranged on the top and bottom sides of the filter element housing 21, and the filter screen 22 is tightly attached to the corresponding filter screen frame 211; an annular step 214 is provided at the top of the cartridge housing 21, and the bottom of the cartridge housing 21 is closed and provided with external threads 213. The filter element assembly 2 is embedded inside the outer housing 1.
An annular step 214 at the top of the filter element shell 21 is matched and positioned with the limiting press shape 112 of the upper shell 11, and a first sealing ring installation groove 212 is arranged on the outer wall of the middle part of the filter element shell 21 and used for installing an annular first sealing ring a; the outer wall of the bottom of the filter element shell 21 is provided with a second sealing ring installation groove 215 for installing an annular second sealing ring b, the filter element shell 21 is matched and connected with the flanging hole 131 of the middle partition plate 13 and is provided with an annular first sealing ring a, the filter element shell 21 is matched and connected with the inner hole 141 of the first interface connecting piece 14 of the lower shell 12 and is provided with an annular second sealing ring b, and the external thread 213 of the bottom of the filter element shell 21 is matched and connected with the internal thread 142 of the first interface connecting piece 14 of the shell body 1. Tap water flows into the lower cavity of the detachable water filtering device from the third interface connector 16 of the outer shell 1, flows into the inner cavity at the top of the filter element assembly 2 after passing through the first layer of filter screen 22 at the bottom of the filter element assembly 2, then passes through the second layer of filter screen 22 at the top of the filter element assembly 2, and flows out from the second interface connector 15 of the outer shell 1 after being subjected to double filtration. The filter element shell 21 is formed by plastic injection molding, the tubular filter screen 22 and the filter screen frame 211 are integrally formed by injection molding, and the mesh number of the tubular filter screen 22 is preferably more than 60 meshes so as to achieve better filtering effect.
As shown in fig. 6 and 7, the bottom of the filter cartridge housing 21 is provided with an in-line handle 216 or an annular dental cap 217 to facilitate the screwing and unscrewing of the filter cartridge assembly 2.
As shown in fig. 14, 15 and 16, when the water heater is assembled, the third interface connector 16 is connected with an external water pipe, the second interface connector 15 is connected with an internal water pipe of the water heater, the third interface connector 16 is used as a water inlet, the second interface connector 15 is used as a water outlet, the first interface connector 14 is welded with the outer shell 1, the outer flange 143 of the first interface connector 14 is fixed on the water heater through bolts, and the outer shell 1 on the first interface connector 14 is located inside the water heater. The cartridge assembly 2 is mounted inside the housing body 1 by mating the external threads 213 of the cartridge housing 21 with the internal threads 142 of the first interface connector 14.
When the tap water flows into the outer shell 1 from the third interface connector 16, the impurities in the tap water are filtered by the filter screen 22 on the filter element assembly 2, and the filtered tap water flows into the water heater through the second interface connector 15. The capacity of the inner cavity of the outer shell 1 is larger, and the mesh number of the filter screen 22 is larger than 60 meshes, so that high-capacity filtration can be realized, and the filtration is cleaner. The filter element assembly 2 and the outer shell 1 are conveniently mounted and dismounted in a threaded mounting mode. The filter has low cost and is suitable for household gas fast water heater and dual-purpose stove.
Example two:
as shown in fig. 2 and 6, the top surface of the cartridge housing 21 is designed as a detachable top cap 23, and the top cap 23 is connected to the top of the cartridge housing 21 by a snap-fit connection or a screw-thread connection. The cartridge housing 21 is made detachable to facilitate cleaning of the interior of the cartridge housing 21 and the filter screen 22.
Example three:
as shown in fig. 2 and 7, the bottom surface of the filter cartridge housing 21 is designed as a detachable bottom end cap 24, and the outer wall of the bottom end cap 24 is provided with an external thread 213 and a second sealing ring mounting groove 215, and the bottom end cap 24 is connected with the bottom of the filter cartridge housing 21 by a snap-fit connection or a screw thread connection. The cartridge housing 21 is made detachable to facilitate cleaning of the interior of the cartridge housing 21 and the filter screen 22.
Example four:
as shown with reference to fig. 8, the inner cavity of the filter element assembly 2 is filled with water purification particles 25 for filtering water quality. The water purifying particles 25 can be activated carbon (absorbing chlorine and purifying odor), soft water resin (reducing hardness), KDF copper-zinc alloy (removing heavy metals), scale inhibitor (reducing scale deposit), tourmaline (releasing trace elements) and the like, can be made of single materials or composite materials, achieve better filtering effect, and meet different water requirements of users.
Example five:
as shown with reference to fig. 9 and 20, the present invention discloses another water filtering device applied to a water heater, which comprises an outer shell 1 and a metal filter element assembly 5, wherein:
as shown in fig. 2, 3, 9, 10, 11, 13, and 20, the detachable water filtering device of the present invention uses a metal filter element assembly 5, the metal filter element assembly 5 is made of metal plates (preferably stainless steel plates), and the metal filter element assembly 5 includes a filter element straight pipe 51, an annular end cover 52, a circular filter screen 53, and a pressure plate 54. The filter element straight tube 51 is a circular straight tube with two open ends, the two ends of the filter element straight tube 51 are respectively provided with a through hole 511 and a limiting ring 513 which are regularly arranged on the circumference, and the middle part of the filter element straight tube 51 is provided with a third sealing ring mounting groove 512 for mounting an annular first sealing ring a. The annular end cover 52 and the pressing plate 54 are both punched into a circular thin plate by metal plates, and water through holes 521 are arranged in the middle of the circular thin plate; the outer contour of annular end cap 52 is provided with a flanging ring 522 which is matched with the inner wall of filter element straight pipe 51. The outer diameter of the circular filter screen 53 is equal to that of the annular end cover 52, and the mesh number of the circular filter screen is preferably more than 60 meshes, so that a better filtering effect is achieved. The circular screen 53 is placed between the annular end cap 52 and the pressure plate 54, and the three are welded together. Two ends of the straight filter element pipe 51 are respectively embedded with an annular end cover 52 containing a filter screen, and are positioned by a limiting ring 513 to form a filter element containing cavity; the flanging ring 522 of the annular end cover 52 is tightly attached to the inner wall of the straight filter element pipe 51 and welded together.
As shown in fig. 9, the metal filter element assembly 5 is embedded inside the outer casing 1, the inner wall of the upper end face of the filter element straight pipe 51 is matched and positioned with the limiting press 112 of the upper casing 11, the filter element straight pipe 51 is matched and connected with the flanging hole 131 of the intermediate partition plate 13, the annular first sealing ring a is arranged in the third sealing ring installation groove 512 of the filter element straight pipe 51, and the split-type lower end cover 24 is connected with the first interface connecting piece 14 of the outer casing 1. The metal filter element component 5 is filled with water purification particles 25 of different types for filtering water quality, so that different water inlet effects can be achieved, and customized requirements of users can be met. Tap water flows into the lower cavity of the detachable water filtering device from the third interface connecting piece 16 of the outer shell 1, flows into the inner cavity of the metal filter element assembly 5 after passing through the through hole 511 and the first layer of circular filter screen 53 at the bottom of the filter element straight pipe 51, flows out from the second layer of circular filter screen 53 and the through hole 511 at the top of the filter element straight pipe 51 after being filtered by the water purifying particles 25, and finally flows out from the second interface connecting piece 15 of the outer shell 1, so that the processes of deep filtration and water quality purification are completed.
As shown in fig. 11 and 12, the lower end cap 24 is provided at the bottom thereof with an in-line handle 216 or an annular dental cap 217 for facilitating the screwing and disassembling of the filter element assembly 2.
Example six:
as shown in fig. 14, 15, 16, 17, 18 and 19, the detachable water filtering device is installed in the water inlet pipeline of the main water channel inside the water heater body, the third interface connector 16 of the outer shell 1 is connected with the water inlet connector of the water heater, and the second interface connector 15 of the outer shell 1 is connected with the water inlet pipe of the water heater. The outer flange 143 of the first interface connector 14 of the outer shell 1 is fixed with the water heater outer shell by screw connection.
Example seven:
referring to fig. 14, 15, 16, 17, 18 and 19, the detachable water filtering device is installed in the water outlet pipeline of the main water channel inside the water heater body, the third interface connector 16 of the outer shell 1 is connected with the water outlet joint of the water heater, and the second interface connector 15 of the outer shell 1 is connected with the water outlet pipe of the water heater.
Example eight:
referring to fig. 14, 15, 16, 17, 18 and 19, the detachable water filtering device is respectively installed on the water inlet pipeline and the water outlet pipeline of the main water channel inside the water heater body, so that double-stage filtering is realized, and the water purifying effect is further improved.
Example nine:
a water heater comprises the water filtering device.
The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.
Claims (14)
1. The water filtering device is applied to a water heater and is characterized by comprising an outer shell (1) and a filter element assembly (2), wherein the outer shell (1) is provided with an intermediate partition plate (13), the water filtering device further comprises a first interface connecting piece (14), and the filter element assembly (2) penetrates through the intermediate partition plate (13) and is arranged inside the outer shell (1) through being connected with the first interface connecting piece (14); the outer shell (1) is arranged in the water heater through the first interface connecting piece (14).
2. A water filtering device according to claim 1, wherein the cartridge assembly (2) comprises a cartridge housing (21) and a screen (22), the cartridge housing (21) being provided with a screen frame (211), the screen (22) being provided on the screen frame (211).
3. A water filtering device according to claim 1, wherein the filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and an upper end cover (23), the filter element housing (21) is provided with a filter screen frame (211), and the upper end cover (23) is connected with the filter screen frame (211) by adopting a snap fit or a screw thread.
4. A water filtering device according to claim 1, wherein the filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and a lower end cap (24), the filter element housing (21) is provided with a filter screen frame (211), and the lower end cap (24) is connected with the filter screen frame (211) by a snap fit or a screw thread.
5. A water filtering device according to any one of the claims 2-4, characterized in that the cartridge housing (21) is filled with water purification particles (25).
6. A water filtering device according to any one of claims 2-4, characterized in that the mesh size of the screen (22) is larger than 60 mesh.
7. A water filtering device as claimed in claim 2 or 3, characterized in that the lower end surface of the filter element housing (21) is provided with a straight handle (216) or an annular dental cap (217).
8. Water filtering device according to claim 4, wherein said lower end cap (24) is provided with a straight handle (216) or an annular dental cap (217).
9. A water filtering device according to claim 1, characterized in that it further comprises a metallic filter element assembly (5), said metallic filter element assembly (5) extending through said intermediate wall (13) and being arranged inside said outer casing (1) by being connected to said first interface connection (14).
10. The water filtering device according to claim 9, wherein the metal filter element assembly (5) comprises a filter element straight pipe (51), an annular end cover (52), a circular filter screen (53) and a pressing plate (54), the annular end cover (52) is arranged at two ends of the filter element straight pipe (51), the circular filter screen (53) is arranged in the annular end cover (52), and the pressing plate (54) presses the circular filter screen (53) and is arranged in the annular end cover (52) in a covering manner.
11. A water filtering device according to claim 10, characterized in that the metal filter element assembly (5) is internally filled with water purification particles (25).
12. The water filtering device as claimed in claim 11, wherein the metal filter element assembly (5) further comprises a lower end cap (24), and the lower end cap (24) is arranged at the bottom of the straight filter element tube (51) and is matched with the first connector (14).
13. Water filtering device according to claim 12, wherein the lower end surface of the lower end cover (24) is provided with a straight handle (216) or an annular dental cap (217).
14. A water heater including a water filtering device as claimed in any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921923319.6U CN212141701U (en) | 2019-11-08 | 2019-11-08 | Water filtering device and water heater using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921923319.6U CN212141701U (en) | 2019-11-08 | 2019-11-08 | Water filtering device and water heater using same |
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| Publication Number | Publication Date |
|---|---|
| CN212141701U true CN212141701U (en) | 2020-12-15 |
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| CN201921923319.6U Active CN212141701U (en) | 2019-11-08 | 2019-11-08 | Water filtering device and water heater using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742092A (en) * | 2020-12-31 | 2021-05-04 | 中建环能科技股份有限公司 | Orifice grating |
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2019
- 2019-11-08 CN CN201921923319.6U patent/CN212141701U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742092A (en) * | 2020-12-31 | 2021-05-04 | 中建环能科技股份有限公司 | Orifice grating |
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