CN213900018U - Water flow adjusting device and water purifier - Google Patents
Water flow adjusting device and water purifier Download PDFInfo
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- CN213900018U CN213900018U CN202023100377.4U CN202023100377U CN213900018U CN 213900018 U CN213900018 U CN 213900018U CN 202023100377 U CN202023100377 U CN 202023100377U CN 213900018 U CN213900018 U CN 213900018U
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Abstract
The utility model discloses a rivers adjusting device and water purifier, rivers adjusting device includes: the valve comprises a valve main body, a valve body and a valve seat, wherein the valve main body is provided with a water inlet channel, a water outlet channel and an installation cavity, one end of the installation cavity is communicated with the water inlet channel, and the other end of the installation cavity is communicated with the water outlet channel; and the valve core assembly is movably arranged in the mounting cavity and used for regulating the flow of water flow between the water inlet channel and the water outlet channel, and a communication hole for communicating the water inlet channel and the water outlet channel is formed in the valve core assembly. The flow direction of water flow can be well adjusted by arranging the communicating hole on the valve core assembly, so that the faucet can normally discharge water, the pipeline machine can preferentially distribute water, and the use effect is good.
Description
Technical Field
The utility model relates to a water purifier field especially relates to a rivers adjusting device and water purifier.
Background
With the development of industrialization, the problem of water pollution is becoming more serious, and in order to ensure healthy and safe domestic water, water purifiers have become an indispensable part of life. In the use process of the water purifier, a tap water pipe is connected into the water purifier, purified water flows out from a water outlet of the water purifier after treatment, the water pipe connected with the water outlet of the water purifier is generally connected with a three-way valve, and the other two interfaces of the three-way valve are respectively connected with a pipeline machine and a faucet. Under normal conditions, when the water faucet or the pipeline machine is used independently, the water faucet and the pipeline machine are not influenced mutually. When the faucet and the pipeline machine are used simultaneously, most of water flows out of the faucet, and the pipeline machine is easy to lack water.
In order to solve the problems, a sequence valve is connected between a three-way valve and a water tap in the prior art, so that the problem that water is preferentially distributed to a pipeline machine is solved. However, when the sequence valve is used, when water flow is small, pressure generated by the water flow is small, water pressure at the three-way valve is small, water pressure at the faucet is large, the valve core of the sequence valve cannot be pushed to be normally opened, and therefore water outlet effect at the faucet is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a water flow adjusting device for solve the problem among the prior art.
In order to solve the above problem, the utility model provides a: a water flow regulating device comprising:
the valve comprises a valve main body, a valve body and a valve body, wherein the valve main body is provided with a water inlet channel, a water outlet channel and an installation cavity, one end of the installation cavity is communicated with the water inlet channel, and the other end of the installation cavity is communicated with the water outlet channel; and
the valve core assembly is movably arranged in the mounting cavity and used for regulating the flow of water flow between the water inlet channel and the water outlet channel, and a communication hole for communicating the water inlet channel and the water outlet channel is formed in the valve core assembly.
As a further improvement of the above technical solution, the communication holes are straight or curved.
As a further improvement of the technical scheme, the communication holes are columnar holes with uniform sizes.
As a further improvement of the above technical solution, the communicating hole has a diameter d and a length l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
Cqsmall pore flow coefficient, when water is fully contracted Cq0.61-0.62, C when water is not completely contractedq＝0.7～0.8；
A-cross sectional area of the communicating hole;
ρ — density of water;
Δ P — the pressure difference between the water inlet channel and the water outlet channel.
As a further improvement of the above technical solution, the communicating hole has a diameter d and a length l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
Cq-small orifice flow coefficient Cq＝0.82；
A-cross sectional area of the communicating hole;
ρ — density of water;
Δ P — the pressure difference between the water inlet channel and the water outlet channel.
As a further aspect of the above technical solutionThe improvement, the diameter of the communicating hole is d, and the length of the communicating hole is l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
u-the viscosity of water;
Δ P — the pressure difference between the water inlet channel and the water outlet channel.
As a further improvement of the above technical solution, a valve port is provided between the installation cavity and the water inlet channel, the valve core assembly includes a valve core, an elastic member and a sealing gasket, the valve core is movably installed in the installation cavity, one end of the valve core is used for blocking the valve port, the sealing gasket is sleeved on the valve core and is located at one end of the valve port, the elastic member abuts against between the other end of the valve core and the cavity wall of the installation cavity, and the communication hole is provided on the valve core and is communicated with the valve port.
As a further improvement of the technical scheme, an absorption piece for absorbing bubbles in the water flow is arranged in the water inlet channel.
As a further improvement of the above technical scheme, the end of the valve main body is provided with a connecting assembly for connecting with an external water pipe, the connecting assembly comprises a pipe claw and a gland, the pipe claw is arranged at the end of the valve main body and communicated with the water inlet channel or the water outlet channel, and the gland is used for fixing the pipe claw on the valve main body.
The utility model has the advantages that: the utility model provides a water flow adjusting device, through set up the intercommunicating pore that feeds through inhalant canal and exhalant canal on the case subassembly, then, when inhalant canal's rivers are less, inhalant canal's pressure is less than exhalant canal's pressure, and the intercommunicating pore plays the effect of pressure release this moment, makes the inhalant canal and the pressure between the exhalant canal the same, and the case subassembly does not play the effect that blocks rivers, and rivers can flow to tap through the intercommunicating pore, makes tap normally go out water; when inhalant canal's rivers are great, make inhalant canal's pressure be greater than the pressure of exhalant canal, case subassembly was opened this moment, rivers can be in other places (the periphery of case subassembly) except that the intercommunicating pore by inhalant canal flow direction exhalant canal to make partial rivers can normally flow to tap, guarantee tap and normally go out water, and simultaneously because the case subassembly has certain effect of blockking, make another part rivers can be preferentially flow to pipeline machine, reach the purpose towards pipeline machine preferred water distribution.
The utility model provides another technical scheme: a water purifier comprises the water flow adjusting device.
The utility model discloses a water purifier owing to use there is foretell rivers adjusting device, can adjust the flow direction of rivers well for tap can normally go out water, also makes pipeline machine water distribution that can take precedence, and good use experience for the user.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a schematic structural diagram of a water flow regulating device according to an embodiment of the present invention;
FIG. 2 shows a schematic cross-sectional view of the water flow regulating device of FIG. 1;
FIG. 3 shows an enlarged partial schematic view at A in FIG. 2;
fig. 4 is a schematic view illustrating a valve cartridge in the water flow regulating device of fig. 2.
Description of the main element symbols:
10-a valve body;
11-a water inlet channel; 12-a water outlet channel; 13-mounting a cavity; 14-valve port; 15-a connecting assembly; 16-a sealing ring; 151-pressing cover; 152-a pipe claw;
20-a spool assembly;
21-a valve core; 22-an elastic member; 23-a gasket; 24-communicating holes;
30-absorbent member.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Examples
The utility model discloses rivers adjusting device can be applied to in the pipeline of various rivers deliveries as required, for example can use in the water purifier of various models to realize the preferential water distribution of pipeline machine, perhaps adjust tap's play water effect etc..
As shown in fig. 1 to 4, a water flow adjusting device according to an embodiment of the present invention will now be described.
The water flow adjusting device includes:
the valve comprises a valve body 10, wherein the valve body 10 is provided with a water inlet channel 11, a water outlet channel 12 and a mounting cavity 13, one end of the mounting cavity 13 is communicated with the water inlet channel 11, and the other end of the mounting cavity 13 is communicated with the water outlet channel 12; and
the valve core assembly 20 is movably installed in the installation cavity 13 and is used for regulating the flow of water between the water inlet channel 11 and the water outlet channel 12, and the valve core assembly 20 is provided with a communication hole 24 which enables the water inlet channel 11 and the water outlet channel 12 to be communicated.
The utility model discloses rivers adjusting device in one of them use the scene, when using, installs valve main part 10 on the water pipe between three-way valve and tap, and wherein, the three-way valve is connected with the one end of water inlet channel 11 on the valve main part 10, and tap is connected with the one end of water outlet channel 12 on the valve main part 10.
Compared with the prior art, the communication hole 24 for communicating the water inlet channel 11 and the water outlet channel 12 is arranged on the valve core assembly 20, so that when the water flow of the water inlet channel 11 is small (for example, the flow is lower than 200ml/min), the pressure of the water inlet channel 11 is lower than that of the water outlet channel 12, at this time, the communication hole 24 plays a role of pressure relief, so that the pressure between the water inlet channel 11 and the water outlet channel 12 is the same, the valve core assembly 20 does not play a role of blocking the water flow, and the water flow can flow to the faucet through the communication hole 24, so that the faucet can normally discharge water; when the water flow of the water inlet channel 11 is large (for example, the flow rate exceeds 200ml/min), the pressure of the water inlet channel 11 is made to be larger than the pressure of the water outlet channel 12, at this time, the valve core assembly 20 is opened, the water flow can flow from the water inlet channel 11 to the water outlet channel 12 at other places (the periphery of the valve core assembly 20) except the communication hole 24, so that part of the water flow can flow to the faucet normally, and the normal water outlet of the faucet is ensured, and meanwhile, because the valve core assembly 20 has a certain blocking effect, the other part of the water flow can flow to the pipeline machine preferentially, and the purpose of preferentially distributing water towards the pipeline machine is achieved.
The shape of the communication hole 24 may be a column, a cone, a frustum, or other irregular shapes, so that the communication hole 24 has functions of communicating water inlet and water outlet between the water inlet channel 11 and the water outlet channel 12, and relieving pressure, and is provided as required.
In one embodiment, as shown in fig. 2 and 3, the communication hole 24 has a straight strip shape or a curved shape.
Specifically, by arranging the communication holes 24 in a straight strip shape, it is beneficial to balance the air pressure between the water inlet channel 11 and the water outlet channel 12; and when the water flow passes through the communicating hole 24, the water flow is prevented from bending and flowing in the communicating hole 24, and the efficiency of the water flow passing can be improved.
In one embodiment, the communication hole 24 may be curved as needed, and the air pressure between the inlet channel 11 and the outlet channel 12 may be balanced.
In one embodiment, as shown in fig. 2 and 3, the communication holes 24 are cylindrical holes of uniform size.
Specifically, through making the cross section size everywhere of intercommunicating pore 24 in length direction the same rectangular hole for the pore wall of intercommunicating pore 24 is smooth, when rivers are less like this, does benefit to rivers and passes through intercommunicating pore 24, avoids rivers to take place the condition that the gyration flows in the intercommunicating pore 24 of size inhomogeneous. The communication hole 24 may be cylindrical or polygonal, and may be provided as needed. In this embodiment, the communication hole 24 is preferably cylindrical to facilitate the flow of water.
The size and length of the communication hole 24 may be selected or set according to the following formula depending on the usage scenario.
In one embodiment, communication aperture 24 has a diameter d and a length l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
Cqsmall pore flow coefficient, when water is fully contracted Cq0.61-0.62, C when water is not completely contractedq＝0.7～0.8；
A — cross sectional area of the communication hole 24;
ρ — density of water;
Δ P — the pressure difference between the water inlet channel 11 and the water outlet channel 12.
In particular, when
In this case, the communication hole 24 is called a thin-walled hole whose length is short, and this is continuedThe effect of blockking of through-hole 24 to rivers is less, and rivers can pass through intercommunicating pore 24 comparatively conveniently, just so can set up the diameter of intercommunicating pore 24 less, reach certain pressurize effect, guarantee to gather certain pressure in inlet channel 11 department and in order to open valve core subassembly 20.
In one embodiment, communication aperture 24 has a diameter d and a length l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
Cq-small orifice flow coefficient Cq＝0.82；
A — cross sectional area of the communication hole 24;
ρ — density of water;
Δ P — the pressure difference between the water inlet channel 11 and the water outlet channel 12.
In particular, when
At this time, the communicating hole 24 is slightly shorter in the length direction and called as a short hole, and at this time, the blocking effect of the communicating hole 24 on the water flow is general, and the water flow can relatively conveniently pass through the communicating hole 24, so that the diameter of the communicating hole 24 can be set to be slightly larger than that of a thin-wall hole, and a certain pressure maintaining effect is also achieved, and a certain pressure can be accumulated at the water inlet channel 11 to open the valve core assembly 20.
In one embodiment, communication aperture 24 has a diameter d and a length l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
u-the viscosity of water;
Δ P — the pressure difference between the water inlet channel 11 and the water outlet channel 12.
In particular, when
When the water inlet channel 11 is opened, the communicating hole 24 is long in the length direction and called as a long hole, at the time, the blocking effect of the communicating hole 24 on water flow is large, the water flow is difficult to pass through the communicating hole 24, the diameter of the communicating hole 24 can be slightly larger than that of a short hole, and therefore when the water flow can pass through, a certain pressure maintaining effect is achieved, and the water inlet channel 11 can be guaranteed to accumulate certain pressure to open the valve core assembly 20.
In one embodiment, as shown in fig. 2 and 3, a valve port 14 is provided between the mounting cavity 13 and the water inlet channel 11, the valve core assembly 20 includes a valve core 21, an elastic member 22 and a sealing gasket 23, the valve core 21 is movably mounted in the mounting cavity 13, one end of the valve core 21 is used for blocking the valve port 14, the sealing gasket 23 is sleeved on the valve core 21 and is located at one end of the valve port 14, the elastic member 22 abuts between the other end of the valve core 21 and the wall of the mounting cavity 13, and the communication hole 24 is provided on the valve core 21 and is communicated with the valve port 14.
Specifically, when the pressure generated by the water pressure of the water inlet channel 11 is higher than the pushing force of the elastic element 22, for example, higher than 0.15MPa, the valve core 21 overcomes the elastic pushing force of the elastic element 22, and at this time, the valve core 21 opens the valve port 14 to release the water pressure, so that the water flow can flow to the water outlet channel 12 in a large amount. When the pressure generated by the water pressure of the water inlet channel 11 is lower than the pushing force of the elastic element 22, for example, lower than 0.11MPa, the valve core 21 closes the valve port 14 under the elastic pushing action of the elastic element 22.
One side of the sealing gasket 23 departing from the valve core 21 is abutted against the wall of the mounting cavity 13, and when the valve port 14 is closed, the sealing gasket 23 plays a sealing role, so that the intermittent passing of water flow between the valve core 21 and the wall of the mounting cavity 13 is avoided, and the pressure leakage condition is reduced. When the valve core 21 closes the valve port 14, i.e. the valve core 21 moves towards the valve port 14 under the pushing action of the elastic element 22, the sealing gasket 23 plays a role of buffering to avoid hard collision between the valve core 21 and the wall of the installation cavity 13.
The elastic member 22 may be a spring of various types or types as required.
The gasket 23 is preferably rubber.
In one embodiment, as shown in fig. 2, an absorption member 30 for absorbing air bubbles in the water flow is provided in the water inlet passage 11.
Specifically, the water bubbles formed in the water current mixed with the air are absorbed by providing the absorption member 30 having minute pores at the water inlet passage 11. When the valve core 21 automatically opens the valve port 14, and water flows through the water inlet channel 11 in a large amount, bubbles in the water flow can be absorbed by the absorption member 30, and the generation of harsh sound when the bubbles are discharged through the narrow water inlet channel 11 and/or the narrow water outlet channel 12 is eliminated, so that the noise generated when the valve core assembly 20 releases water pressure is reduced.
In this embodiment, the absorbent member 30 may be PP cotton (abbreviated as Polypropylene cotton, chinese name: jeans, hollow cotton) and effectively absorbs the bubbles formed by the air mixed therein through the fine and dense micro-porous gaps of the PP cotton, so as to eliminate the harsh sound generated when the bubbles are discharged through the long and narrow water inlet passage 11 and/or the water outlet passage 12. Of course, the absorption member 30 may also be porous ceramic with micropores or porous sponge, and may be selected according to actual needs, and is not limited herein.
In the present embodiment, the absorption member 30 is provided in a columnar shape, and the outer peripheral surface of the absorption member 30 is attached to the inner side wall of the water inlet passage 11, so that the passage of the bubbles with pressure through the gap between the outer peripheral surface of the absorption member 30 and the inner side wall of the water inlet passage 11 is avoided, and the bubble absorption/elimination effect is improved.
In one embodiment, as shown in fig. 1 and 2, the end of the valve body 10 is provided with a connection assembly 15 for connecting with an external water pipe, the connection assembly 15 includes a pipe jaw 152 and a gland 151, the pipe jaw 152 is provided at the end of the valve body 10 and communicates with the water inlet passage 11 or the water outlet passage 12, and the gland 151 is used for fixing the pipe jaw 152 to the valve body 10.
Specifically, both ends of the valve main body 10 (i.e., the end of the water inlet passage 11 and the end of the water outlet passage 12) are provided with the connection assemblies 15 for connecting with an external water pipe, and the valve main body 10 can be conveniently connected with the external water pipe by inserting the external water pipe into the pipe claws 152 and then fixing; a sealing ring 16 may be disposed on the valve body 10 near the connection assembly 15 to seal water, thereby preventing water leakage when the valve body 10 is connected to an external water pipe. The seal ring 16 is preferably a rubber seal ring.
The embodiment of the utility model provides a water purifier is still provided, including foretell rivers adjusting device.
The utility model discloses water purifier owing to use there is foretell rivers adjusting device, can adjust the flow direction of rivers well for tap can normally go out water, also makes pipeline machine can the preferential water distribution, and the good use of giving the user is experienced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A water flow regulating device, characterized in that: the method comprises the following steps:
the valve comprises a valve main body, a valve body and a valve body, wherein the valve main body is provided with a water inlet channel, a water outlet channel and an installation cavity, one end of the installation cavity is communicated with the water inlet channel, and the other end of the installation cavity is communicated with the water outlet channel; and
the valve core assembly is movably arranged in the mounting cavity and used for regulating the flow of water flow between the water inlet channel and the water outlet channel, and a communication hole for communicating the water inlet channel and the water outlet channel is formed in the valve core assembly.
2. The water flow regulating device of claim 1, wherein: the communicating holes are in a straight strip shape or a bent shape.
3. The water flow regulating device of claim 1, wherein: the communicating holes are columnar holes with uniform sizes.
4. The water flow regulating device of claim 1, wherein: the diameter of the communicating hole is d, and the length of the communicating hole is l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
Cqsmall pore flow coefficient, when water is fully contracted Cq0.61-0.62, C when water is not completely contractedq＝0.7～0.8；
A-cross sectional area of the communicating hole;
ρ — density of water;
Δ P — the pressure difference between the water inlet channel and the water outlet channel.
5. The water flow regulating device of claim 1, wherein: the diameter of the communicating hole is d, and the length of the communicating hole is l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
Cq-small orifice flow coefficient Cq＝0.82；
A-cross sectional area of the communicating hole;
ρ — density of water;
Δ P — the pressure difference between the water inlet channel and the water outlet channel.
6. The water flow regulating device of claim 1, wherein: the diameter of the communicating hole is d, and the length of the communicating hole is l; when in use
The method comprises the following steps:
wherein, each parameter is respectively:
q is the flow rate;
u-the viscosity of water;
Δ P — the pressure difference between the water inlet channel and the water outlet channel.
7. The water flow regulating device according to any one of claims 1 to 6, wherein: the valve core assembly comprises a valve core, an elastic part and a sealing gasket, the valve core is movably arranged in the mounting cavity, one end of the valve core is used for blocking the valve port, the sealing gasket is sleeved on the valve core and positioned at one end of the valve port, the elastic part is abutted between the other end of the valve core and the cavity wall of the mounting cavity, and the communicating hole is formed in the valve core and communicated with the valve port.
8. The water flow regulating device according to any one of claims 1 to 6, wherein: an absorption piece for absorbing bubbles in water flow is arranged in the water inlet channel.
9. The water flow regulating device according to any one of claims 1 to 6, wherein: the tip of valve main part is equipped with the coupling assembling that is used for with external water piping connection, coupling assembling includes pipe claw and gland, the pipe claw is located the tip of valve main part and with water inlet channel or water outlet channel intercommunication, the gland is used for with the pipe claw is fixed in the valve main part.
10. A water purifier is characterized in that: comprising a water flow regulating device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023100377.4U CN213900018U (en) | 2020-12-21 | 2020-12-21 | Water flow adjusting device and water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023100377.4U CN213900018U (en) | 2020-12-21 | 2020-12-21 | Water flow adjusting device and water purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213900018U true CN213900018U (en) | 2021-08-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023100377.4U Active CN213900018U (en) | 2020-12-21 | 2020-12-21 | Water flow adjusting device and water purifier |
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| CN (1) | CN213900018U (en) |
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