CN218845186U - Water mixing valve and water heater - Google Patents

Abstract

The utility model belongs to the technical field of the valve, a mix water valve and water heater is specifically disclosed. The water mixing valve comprises a water mixing valve main body, a filter screen and a plugging piece, wherein the water mixing valve main body is provided with a cold water inlet channel, a cold water electricity preventing wall structure and a cold water outlet which are sequentially communicated, a filter cavity is arranged between the water outlet end of the cold water inlet channel and the water inlet end of the cold water electricity preventing wall structure, the filter cavity penetrates through one side wall of the water mixing valve main body, and the cavity wall of the filter cavity is provided with a limiting groove; the filter screen is of a plate-shaped structure and is inserted into the limiting groove, the filter screen divides the filter cavity into a raw water side and a filter side, the raw water side is communicated with the water outlet end of the cold water inlet channel, and the filter side is communicated with the water inlet end of the cold water electricity-proof wall structure; the plugging piece is detachably connected with the water mixing valve main body and plugs the opening of the filter cavity, and the plugging piece is abutted to the filter screen. The utility model discloses a mix water valve and water heater can improve the dismouting convenience of filter screen, improves the performance of mixing water valve and water heater.

Description

Water mixing valve and water heater

Technical Field

The utility model relates to a valve technical field especially relates to mix water valve and water heater.

Background

The mixing valve is a valve structure commonly used in water heaters, generally plays a role in adjusting the outlet water temperature and keeping the outlet water temperature constant, and is generally divided into a mechanical mixing valve and a water mixing valve according to different adjusting modes.

The water mixing valve is provided with a cold water inlet channel for accessing tap water, and because the tap water contains more impurities, the existing water mixing valve is usually provided with a filter screen at the water inlet end of the cold water inlet channel so as to filter the tap water entering the inside of the water mixing valve in order to avoid the impurities from blocking the internal channel of the water mixing valve.

However, current muddy water valve structure because the filter screen is installed at the inlet end department, when needs installation and dismantlement filter screen, need pull down muddy water valve from the cold water delivery pipe, carries out the installation and the dismantlement work of filter screen again, leads to the filter screen to dismantle efficiency lower, can't realize the online maintenance and the change of filter screen, influences muddy water valve's performance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses one of the technical problem who solves provides and mixes the water valve to reduce the filter screen and dismantle the degree of difficulty, improve filter screen dismouting and installation convenience, improve the performance that mixes the water valve.

The second technical problem solved by the present invention is to provide a water heater to improve the usability of the water heater.

The first technical problem is solved by the following technical scheme:

mix water valve includes:

the water mixing valve comprises a water mixing valve body and a water outlet, wherein the water mixing valve body is provided with a cold water inlet channel, a cold water electricity preventing wall structure and a cold water outlet which are sequentially communicated, a filter cavity is arranged between the water outlet end of the cold water inlet channel and the water inlet end of the cold water electricity preventing wall structure, the filter cavity penetrates through one side wall of the water mixing valve body, and the cavity wall of the filter cavity is provided with a limiting groove;

the filter screen is of a plate-shaped structure, is positioned in the filter cavity, and is inserted into the limiting groove at the side edge, the filter screen divides the filter cavity into a raw water side and a filter side, the raw water side is communicated with the water outlet end of the cold water inlet channel, and the filter side is communicated with the water inlet end of the cold water electricity-proof wall structure;

the plugging piece is detachably connected with the water mixing valve main body and plugs the opening of the filter cavity, and the plugging piece is abutted to the filter screen so that the filter screen is fixed in the limiting groove.

Mix water valve main part, compare with the background art, the beneficial effect who has is: the filter screen is arranged between the water outlet end of the cold water inlet channel and the water inlet end of the cold water electricity-proof wall structure, so that the probability of impurities in cold water entering the cold water electricity-proof wall structure can be reduced or avoided, the probability of blockage of an internal channel of the water mixing valve is reduced, and the use safety and the cleaning convenience of the water mixing valve are improved; simultaneously, through the shutoff piece that sets up to have open-ended filter chamber and shutoff filter chamber, the dismantlement of filter screen can be realized through the dismantlement of shutoff piece, need not to mix water valve wholly to demolish from cold water supply pipeline, improves filter assembly's dismouting convenience and dismouting efficiency, and can realize filter assembly's online installation and change, improves the convenience of use and the use experience of mixing the water valve. Wherein, the filter screen is platelike, and occupation space is less, makes the raw water side of filter chamber can have the space of great storage impurity to reduce the clearance frequency of filter screen, can be favorable to mixing the miniaturized design of water valve simultaneously.

In one embodiment, the wall of the filter cavity is convexly provided with two convex rib parts, and the limiting groove is formed between the two convex rib parts.

In one embodiment, the filter screen comprises a frame portion and a screen portion connected to the inner side of the frame portion, the frame portion is inserted into the limiting groove, each side groove wall of the limiting groove is attached to the surface of the frame portion, and the blocking piece is abutted to the frame portion.

In one embodiment, the plugging piece comprises a plugging portion and an end sealing portion, the plugging portion is in threaded connection with the cavity wall of the filter cavity, the end sealing portion is located on the outer side of the water mixing valve main body, and a sealing ring is arranged between the end sealing portion and the water mixing valve main body.

In one embodiment, the plugging piece further comprises an operating part, the operating part and the inserting part are respectively connected to two opposite sides of the end sealing part, an operating plane is arranged on the circumferential side wall of the operating part, and a plurality of operating planes are arranged around the circumference of the operating part.

In one embodiment, an annular positioning step surface is formed on the inner wall of the filter cavity, the positioning step surface faces the opening of the filter cavity, and the inner end surface of the blocking piece abuts against the positioning step surface.

In one embodiment, the mixing valve body comprises a valve body extending along a first direction and a cold water inlet pipe portion perpendicularly connected with the valve body, the cold water inlet pipe portion is internally provided with the cold water inlet channel, the valve body is internally provided with the cold water electricity-proof wall structure, and the filter cavity is arranged at the intersection of the cold water inlet pipe portion and the valve body.

In one embodiment, the mixing valve body further comprises a cold water outlet pipe part vertically connected with the valve body, and one end of the cold water outlet pipe part far away from the valve body forms the cold water outlet;

the opening of the filter cavity deviates from the cold water outlet pipe part, and the plugging piece and the cold water outlet pipe part are respectively positioned on two opposite sides of the valve main body.

In one embodiment, the mixing valve body further comprises a filter valve portion, the filter chamber is formed in the filter valve portion, a first end of the filter valve portion is connected with the valve body, a second end of the filter valve portion is a mounting plane, the cold water inlet pipe portion is connected to the periphery side of the filter valve portion, and the blocking piece is detachably mounted on the mounting plane.

The second technical problem is solved by the following technical solutions:

a water heater comprising a mixing valve as described above.

Water heater, compare with the background art, the beneficial effect who has is: through adopting foretell muddy water valve, can reduce the probability that impurity gets into in the water heater inner bag, and improve filter screen dismouting efficiency, improve the use reliability and the convenience of water heater.

Drawings

Fig. 1 is a schematic structural view of a water mixing valve according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a cross-section of a mixing valve according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of another section of a mixing valve according to an embodiment of the present invention;

fig. 4 is a partial enlarged view at I in fig. 3.

Description of reference numerals:

1. a water mixing valve main body; 11. a valve body; 111. a cold water electricity-proof wall structure; 112. a hot water electricity-proof wall structure; 113. a cold water passage; 12. a cold water inlet pipe portion; 121. a cold water inlet channel; 122. a cold water outlet; 13. a mixed water outlet pipe part; 131. a water mixing cavity; 132. a mixed water outlet; 14. a cold water outlet pipe portion; 141. a cold water outlet channel; 142. a cold water outlet; 15. a hot water inlet pipe portion; 16. a filter valve section; 161. a filter chamber; 1611. raw water side; 1612. filtering the side; 162. a bead portion; 163. a limiting groove;

2. a filter assembly; 21. a filter screen; 211. a frame portion; 212. a net section; 22. a blocking member; 221. a plug-in part; 222. an end seal; 223. an operation unit; 224. sealing the ring groove;

4. a temperature detection device; 5. a flow rate detection device.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the present application.

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 application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1, the present embodiment provides a water mixing valve, which can be applied to water heaters such as an electric water heater and a gas water heater to adjust the outlet water temperature and the outlet water mode, so as to improve the outlet comfort.

As shown in fig. 1 to 3, the mixing valve includes a mixing valve main body 1 and a valve core assembly, and the mixing valve main body 1 has a water mixing cavity 131, a cold water inlet channel 121, a hot water inlet, a cold water outlet 142, a mixed water outlet 132, a cold water electricity preventing wall structure 111, a cold water channel 113 and a hot water electricity preventing wall structure 112.

The cold water inlet channel 121 is used for introducing external input cold water such as tap water, two ends of the cold water electricity preventing wall structure 111 are respectively communicated with the cold water outlet 142 and the cold water inlet channel 121, two ends of the cold water channel 113 are respectively communicated with the cold water inlet channel 121 and the water mixing cavity 131, two ends of the hot water electricity preventing wall structure 112 are respectively communicated with the hot water inlet and the water mixing cavity 131, and the water mixing water outlet 132 is communicated with the water mixing cavity 131. Namely, the external cold water entering from the cold water inlet channel 121 flows to the water mixing cavity 131 through the cold water channel 113, and flows to the water heater liner through the cold water electricity-proof wall structure 111 and the cold water outlet 122. The hot water flowing out of the water heater flows to the hot water electricity-proof wall structure 112 through the hot water inlet, and flows to the water mixing cavity 131 through the hot water electricity-proof wall structure 112 for water mixing. The valve core assembly includes a valve core movably disposed in the mixing chamber 131 to be selectively opened, so that the cold water and the hot water are mixed in the mixing chamber 131 to form a certain mixed water, and the mixed water flows out through the mixed water outlet 132.

The structure setting of mixing water chamber 131 and the structure setting of case subassembly all can refer to prior art, this is not the utility model discloses a key, no longer repeated here. It is readily understood that the electricity-proof wall structure is a conventional structure in the art, and therefore, the explanation of the electricity-proof wall structure is omitted here.

In order to prevent impurities in the cold water from entering the cold water electricity preventing wall structure 111, in this embodiment, a filter cavity 161 is disposed between the water outlet end of the cold water inlet channel 121 and the water inlet end of the cold water electricity preventing wall structure 111, the filter cavity 161 penetrates through a sidewall of the water mixing valve main body 1, and a limiting groove 163 is disposed inside the filter cavity 161. The filter assembly 2 comprises a blocking piece 22 and a filter screen 21, the filter screen 21 is of a plate-shaped structure, the filter screen 21 is inserted into the filter cavity 161, the side edge of the filter screen is inserted into the limiting groove 163, the filter screen 21 divides the filter cavity 161 into a raw water side 1611 and a filter side 1612, and the filter side 1612 is communicated with a water inlet end of the cold water electricity-proof wall structure 111; the plugging member 22 is detachably connected to the mixing valve body 1 to plug the opening of the filtering chamber 161, and the plugging member 22 abuts against the filtering net 21, so that the filtering net 21 is fixed in the limiting groove 163.

According to the water mixing valve provided by the embodiment, the filter screen 21 is arranged between the water outlet end of the cold water inlet channel 121 and the water inlet end of the cold water electricity preventing wall structure 111, so that the probability of impurities in cold water entering the cold water electricity preventing wall structure 111 can be reduced or avoided, the probability of blockage of an internal channel of the water mixing valve is reduced, and the use safety and the cleaning convenience of the water mixing valve are improved; meanwhile, due to the arrangement, the filtering assembly 2 is separated from the cold water inlet of the water mixing valve, the connection between the water mixing valve and a cold water supply pipe is prevented from being interfered by the arrangement of the filtering assembly 2, the filtering net 21 can be disassembled by disassembling the plugging piece 22 through the arrangement of the filtering cavity 161 with the opening and the plugging piece 22 for plugging the filtering cavity 161, the water mixing valve is not required to be integrally disassembled from the cold water supply pipeline, the disassembling and assembling convenience and the disassembling and assembling efficiency of the filtering assembly 2 are improved, the online installation and replacement of the filtering assembly 2 can be realized, and the use convenience and the use experience of the water mixing valve are improved; moreover, through setting up spacing groove 163 on the inner wall of filter chamber 161 to realize filter screen 21 installation location and spacing in filter chamber 161, reduce the probability that filter screen 21 rocked and shifted under the cold water flow impact, improve filter screen 21's stability of setting, and reduce muddy water valve's noise, improve muddy water valve's use reliability.

In an embodiment, the mixing valve body 1 includes a body pipe portion 11, the body pipe portion 11 extends along a first direction, the mixing valve further includes a cold water inlet pipe portion 12 and a mixing water outlet pipe portion 13 which are opposite to each other and are disposed at intervals along the first direction, the cold water inlet passage 121 is formed in the cold water inlet pipe portion 12, a first end of the cold water inlet passage 121 penetrates through a first end face of the cold water inlet pipe portion 12 and forms a cold water inlet, and a second end of the cold water inlet pipe portion 12 is connected to the body pipe portion 11. The mixed water outlet pipe portion 13 is connected to the main body pipe portion 11, and the mixed water chamber 131 and the mixed water outlet 132 are provided in the mixed water outlet pipe portion 13.

It can be understood that, the structure setting of muddy water delivery pipe portion 13, the structure setting of muddy water chamber 131 and the structure setting of case subassembly all can refer to prior art, this not the utility model discloses a key point, no longer describe herein.

Be provided with foretell cold water in the main part pipe portion 11 and prevent electric wall structure 111, filter chamber 161 sets up in the intersection of cold water inlet pipe portion 12 and main part pipe portion 11, can reduce the interference of filter assembly 2 to the structure on main part pipe portion 11 and the cold water inlet pipe portion 12 from this, improves muddy water valve's overall structure compactness, and provides sufficient space for filter assembly 2's dismouting.

The cold water channel 113 is arranged in the main body pipe part 11, the cold water channel 113 extends along the first direction, and the water inlet end of the cold water channel 113 is communicated with the filtering side 1162, so that water entering the cold water channel 113 is filtered by the filtering net 21, and the probability of impurities entering the water mixing cavity 131 is reduced.

The mixing valve main body 1 further comprises a cold water outlet pipe portion 14 and a hot water inlet pipe portion 15 which are opposite to each other along the first direction and are arranged at intervals, a cold water outlet 122 is formed at a first end of the cold water outlet pipe portion 14, a second end of the cold water outlet pipe portion 14 is connected with the main body pipe portion 11, a cold water outlet channel 141 which is communicated with the cold water outlet 122 and a water outlet end of the cold water electricity-proof wall structure 111 is arranged on the cold water outlet pipe portion 14, and the first end of the hot water inlet pipe portion 15 forms the hot water inlet.

In one embodiment, the cold water outlet pipe portion 14 extends along a third direction, which is perpendicular to both the first direction and the second direction. The cold water outlet pipe portion 14 is preferably located at the same end of the main body pipe portion 11 as the cold water inlet pipe portion 12, and the hot water inlet pipe portion 15 is preferably located at the same end of the main body pipe portion 11 as the mixed water outlet pipe portion 13, so as to facilitate the installation of the electricity-proof wall structure.

Plugging piece 22 and cold water outlet pipe portion 14 are connected respectively in the relative both sides of main part pipe portion 11 to when actual installation, make plugging piece 22 be located main part pipe portion 11 and keep away from the one side of water heater casing, thereby for the dismantlement of plugging piece 22 provides sufficient operating space, improve filtering component 2's dismouting convenience.

The mixing valve body 1 further comprises a filter valve portion 16 with an open end, the filter valve portion 16 is connected between the cold water inlet pipe portion 12 and the main body pipe portion 11, the open end of the filter valve portion 16 is disposed away from the main body pipe portion 11, and a filter chamber 161 is formed in the filter valve portion 16. The peripheral wall of filter valve portion 16 is connected with cold water inlet pipe portion 12, and the bottom of filter valve portion 16 is connected with main part pipe portion 11, and the one end terminal surface that filter valve portion 16 kept away from main part pipe portion 11 is mounting surface, and shutoff piece 22 detachably installs in mounting surface, can improve filtering component 2 positioning reliability and installation convenience on muddy water valve main part 1 from this, and the setting of mounting surface, more is favorable to realizing the sealing connection between muddy water valve main part 1 and the shutoff piece 22.

The filter valve section 16 is preferably of cylindrical configuration with the axis of the cylindrical configuration being disposed in the third direction to enhance ease of connection of the filter assembly 2 to the filter valve section 16. It will be appreciated that in other embodiments the filter valve portion 16 may be of other shapes, as long as the connection between the filter valve portion 16 and the filter assembly 2 is achieved, and the connection between the filter valve portion 16 and the cold water inlet pipe portion 12 and the main body pipe portion 11 is achieved.

As shown in fig. 3 and 4, in one embodiment, the wall of the filter cavity 161 is convexly provided with two convex rib portions 162, the two convex rib portions 162 are opposite and spaced, and the above-mentioned limit groove 163 is formed between the two convex rib portions 162. The arrangement of the rib part 162 can increase the depth of the limiting groove 163 under the condition of keeping the wall thickness of the filter valve part 16 unchanged, thereby improving the installation reliability of the filter screen 21 and ensuring the structural strength and rigidity of the filter valve part 16; meanwhile, the rib part 162 forms the limit groove 163, so that the overall shape of the limit groove 163 is not limited by the shape of the inner cavity of the filter cavity 161, and the shape of the limit groove 163 is more adaptive to the shape of the filter screen 21.

In an embodiment, the filter screen 21 includes a frame portion 211 and a screen portion 212 connected to the inner side of the frame portion 211, the frame portion 211 is inserted into the limiting groove 163, each side groove wall of the limiting groove 163 is attached to the surface of the frame portion 211, and the blocking member 22 abuts against the frame portion 211. The rib portion 162 is a U-shaped structure with a downward opening of the plugging member 22, so as to be adapted to the shape of the filter screen 21. This kind of setting guarantees that the side homoenergetic of filter screen 21 can insert in spacing groove 163, reduces or avoids the gap between filter screen 21 and the 161 chamber walls of filter chamber.

Preferably, the thickness of the frame portion 211 is greater than the thickness of the mesh portion 212 to further enhance the structural strength and rigidity of the frame portion 211. Preferably, the cross section of the frame portion 211 and the cross section of the limiting groove 163 are both rectangular, so as to facilitate the processing of the filter screen 211 and the limiting groove 163. The cross section and the shape of the frame portion 211 are preferably the same as the cross section and the size of the limiting groove 163, so that the frame portion 211 is completely inserted into the limiting groove 163, thereby ensuring the stability of the filter screen 21 inserted into the limiting groove 163 and increasing the effective area of the screen portion 212.

In an embodiment, an annular positioning step surface is formed on the inner wall of the filter cavity 161, the positioning step surface faces the opening of the filter cavity 161, and the inner end surface of the blocking piece 22 abuts against the positioning step surface, so that the blocking piece 22 is installed and positioned in the filter cavity 161, the filter screen 21 is prevented from being extruded with the cavity wall of the filter cavity 161, and the assembly and disassembly efficiency of the filter assembly 2 is improved.

In one embodiment, the filtering chamber 161 includes a main filtering chamber and a mounting chamber, the main filtering chamber and the mounting chamber are connected, the mounting chamber is located on the side of the main filtering chamber facing the opening of the filtering chamber 161, the filter screen 21 is located in the mounting chamber, and the cold water inlet channel 121 and the cold water electricity-proof wall structure 111 are both connected to the mounting chamber. The positioning step surface is formed between the mounting cavity part and the main filtering cavity part, and the plugging piece 22 is hermetically mounted in the mounting cavity part.

The plugging member 22 is preferably screwed to the filter chamber 161 to improve the connection reliability of the plugging member 22 to the mixer valve body 1, and the screwed connection can also achieve a screw seal to improve the installation sealing performance of the plugging member 22 on the mixer valve body 1. Specifically, the plugging member 22 is provided with an external thread, the cavity wall of the installation cavity portion is provided with an internal thread, and the external thread is in threaded fit with the internal thread.

The plugging member 22 includes a plugging portion 221 and an end sealing portion 222, and the plugging portion 221 is inserted into the mounting cavity and is screwed with the cavity wall of the mounting cavity. The end seal 222 and the filter screen 21 are respectively located at two opposite sides of the insertion part 221. The end sealing portion 222 is located outside the water mixing valve body 1, an end sealing step surface is formed between the end sealing portion 222 and the insertion portion 221, the end sealing step surface faces the water mixing valve body 1, and a sealing ring is arranged between the end sealing step surface and the water mixing valve body 1.

Through setting up grafting portion 221 and end seal 222, not only can realize the end face seal between muddy water valve main part 1 and the shutoff piece 22 through the sealing washer, can also realize thread seal through grafting portion 221 and the parietal threaded connection of filter chamber 161, effectively improve the sealing performance between shutoff piece 22 and muddy water valve main part 1, prevent muddy water valve leakage.

Furthermore, a sealing ring groove 224 is formed in the end seal step surface, the end seal step surface is abutted to the mounting plane, the sealing ring is arranged in the sealing ring groove 224, and the mounting plane and the end seal step surface are sealed through the sealing ring.

In order to further improve the convenience of assembling and disassembling the plugging member 22, the plugging member 22 further includes an operating portion 223, the operating portion 223 and the plugging portion 221 are respectively connected to two opposite sides of the end sealing portion 222, and an operating plane is opened on a circumferential side wall of the operating portion 223, and a plurality of operating planes are arranged around the circumference of the operating portion 223. The provision of the operating plane facilitates the user to turn the closure 22 by means of a tool such as a wrench. The operating portion 223 is preferably of a hexagonal prism structure, i.e. the operating portion 223 has six operating planes end to end.

In order to improve the usability of the water mixing valve, the temperature detection device 4 is arranged on the cold water inlet pipe part 12, and the temperature detection device 4 is used for detecting the inlet water temperature so as to better realize the outlet water temperature control of the water mixing valve. A flow rate detecting device 5 is disposed at a position of the mixed water outlet pipe portion 13 near the mixed water outlet 132 to detect the outlet water flow rate of the mixing valve. The temperature detecting device 4 and the flow rate detecting device 5 can be arranged according to the prior art, and are not described herein.

Other structures of mixing the water valve can set up according to prior art, this not the utility model discloses a key, no longer give consideration to here.

The utility model also provides a water heater, including foretell muddy water valve. The water heater that this embodiment provided, through adopting foretell muddy water valve, can reduce the probability that impurity got into in the water heater inner bag, and improve filter screen 21 dismouting efficiency, improve the use reliability and the convenience of water heater.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The detailed description of the above embodiments only expresses several embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. Mix water valve, its characterized in that includes:

the water mixing valve comprises a water mixing valve body (1) and a water outlet (142), wherein the water mixing valve body is provided with a cold water inlet channel (121), a cold water electricity-proof wall structure (111) and the cold water outlet (142) which are sequentially communicated, a filter cavity (161) is arranged between the water outlet end of the cold water inlet channel (121) and the water inlet end of the cold water electricity-proof wall structure (111), the filter cavity (161) penetrates through one side wall of the water mixing valve body (1), and a limit groove (163) is formed in the cavity wall of the filter cavity (161);

the filter screen (21) is of a plate-shaped structure, the filter screen (21) is located in the filter cavity (161), the side edge of the filter screen is inserted into the limiting groove (163), the filter screen (21) divides the filter cavity (161) into a raw water side (1611) and a filter side (1612), the raw water side (1611) is communicated with the water outlet end of the cold water inlet channel (121), and the filter side (1612) is communicated with the water inlet end of the cold water electricity-proof wall structure (111);

the plugging piece (22) is detachably connected with the water mixing valve main body (1) and plugs the opening of the filtering cavity (161), and the plugging piece (22) is abutted against the filtering net (21) so that the filtering net (21) is fixed in the limiting groove (163).

2. The mixing valve according to claim 1, wherein the wall of the filtering cavity (161) is convexly provided with two convex rib portions (162), and the two convex rib portions (162) are arranged at intervals to form the limiting groove (163).

3. The mixing valve according to claim 1, characterized in that the filter screen (21) comprises a frame portion (211) and a screen portion (212) connected to the inner side of the frame portion (211), the frame portion (211) is inserted into the limiting groove (163), each side wall of the limiting groove (163) is attached to the surface of the frame portion (211), and the plugging member (22) abuts against the frame portion (211).

4. The mixing valve according to claim 1, wherein the blocking piece (22) comprises a plug-in part (221) and an end sealing part (222), the plug-in part (221) is in threaded connection with the wall of the filter cavity (161), the end sealing part (222) is located outside the mixing valve body (1), and a sealing ring is arranged between the end sealing part (222) and the mixing valve body (1).

5. The mixing valve according to claim 4, wherein the blocking piece (22) further comprises an operating part (223), the operating part (223) and the inserting part (221) are respectively connected to two opposite sides of the end sealing part (222), and an operating plane is opened on the circumferential side wall of the operating part (223), and a plurality of operating planes are arranged around the circumference of the operating part (223).

6. The mixing valve according to claim 4, characterized in that the inner wall of the filter chamber (161) is formed with an annular positioning step surface facing the opening of the filter chamber (161), and the inner end surface of the blocking piece (22) abuts against the positioning step surface.

7. The mixing valve according to any of the claims 1-6, characterized in that the mixing valve body (1) comprises a body pipe portion (11) extending along a first direction and a cold water inlet pipe portion (12) perpendicularly connected to the body pipe portion (11), the cold water inlet passage (121) is arranged in the cold water inlet pipe portion (12), the cold water electricity-proof wall structure (111) is arranged in the body pipe portion (11), and the filtering cavity (161) is arranged at the intersection of the cold water inlet pipe portion (12) and the body pipe portion (11).

8. The mixing valve according to claim 7, characterized in that the mixing valve body (1) further comprises a cold water outlet pipe portion (14) perpendicularly connected to the body pipe portion (11), wherein the cold water outlet pipe portion (142) is formed at an end of the cold water outlet pipe portion (14) away from the body pipe portion (11);

the opening of the filter cavity (161) deviates from the cold water outlet pipe part (14), and the plugging piece (22) and the cold water outlet pipe part (14) are respectively positioned at two opposite sides of the main body pipe part (11).

9. The mixing valve according to claim 7, wherein the mixing valve body (1) further comprises a filter valve portion (16), the filter chamber (161) is formed in the filter valve portion (16), a first end of the filter valve portion (16) is connected with the body pipe portion (11), a second end of the filter valve portion (16) is a mounting plane, the cold water inlet pipe portion (12) is connected with a peripheral side of the filter valve portion (16), and the blocking piece (22) is detachably mounted on the mounting plane.

10. Water heater characterized in that it comprises a mixing valve according to any of claims 1-9.

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