Water heater

Abstract

The invention discloses a water heater which comprises an inner container connected with a water inlet pipe; the filter element assembly is connected to the water inlet pipe in series, the filter element assembly comprises a filter element mounting seat and a filter element detachably connected with the filter element mounting seat, the filter element mounting seat is provided with a water inlet connector, the filter element comprises a shell and a water stop piece, the shell comprises a first shell and a second shell, one end of the first shell is open, the second shell is arranged at the open end of the first shell, and the water stop piece is arranged on the first shell. The end, facing the first shell, of the second shell is open and detachably connected with the first shell, the shells are provided with water inlet holes, the water stop pieces are arranged in the shells and located at the water inlet holes, when the filter element is separated from the filter element installation base, the water stop pieces block the water inlet holes, and when the filter element is connected with the filter element installation base, the filter element installation base pushes the water stop pieces to open the water inlet holes, and the water stop pieces are located in the water inlet holes. And the water inlet hole is communicated with the water inlet interface. According to the water heater, a user can have better bathing comfort, and the use experience of the user is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, in particular to a water heater. Background Art

[0002] The rapid development of society and science and technology has brought people better living conditions and higher living standards. The improvement of living standards has made people pay more and more attention to personal health, and the number of baths per week has a significant increase. In the related technology, the water output of electric water heaters contains substances such as chloride ions that irritate the skin, causing symptoms such as itchy skin after the user takes a bath, affecting the user's bathing comfort. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a water heater, which can well improve the bathing comfort of users and provide users with a better use experience.

[0004] According to the first aspect of the present invention, the water heater comprises: an inner tank, which is connected to a water inlet pipe; a filter element assembly, which is serially connected to the water inlet pipe, the filter element assembly comprising a filter element mounting seat and a filter element detachably connected to the filter element mounting seat, the filter element mounting seat having a water inlet interface, the filter element comprising a shell and a water stop member, the shell comprising a first shell and a second shell, one end of the first shell is open, the second shell is arranged at the open end of the first shell, the end of the second shell facing the first shell is open and detachably connected to the first shell, the shell has a water inlet hole, the water stop member is arranged in the shell and is located at the water inlet hole position, wherein when the filter element is separated from the filter element mounting seat, the water stop member blocks the water inlet hole, and when the filter element is connected to the filter element mounting seat, the filter element mounting seat pushes the water stop member to open the water inlet hole so that the water inlet hole is connected to the water inlet interface.

[0005] According to the water heater of the present invention, the incoming water is filtered by connecting a filter element assembly in series on the water inlet pipe of the water heater, thereby effectively avoiding the user from experiencing discomfort such as skin itching after bathing, and at the same time reducing the probability of scaling of the water heater. A water stop member that can open and seal the water inlet hole of the filter element is provided in the filter element assembly, which can effectively avoid the situation where water in the filter element is spilled from the water inlet hole when the filter element is replaced. A first shell and a second shell that can be detachably connected are provided in the filter element, so that the filter element assembly is more convenient, thereby allowing the user to have better bathing comfort and greatly improving the user experience.

[0006] In addition, the water heater according to the present invention may also have the following additional technical features:

[0007] In some embodiments of the present invention, the water heater includes a shell, the inner tank is arranged in the shell, the filter element assembly is arranged in the shell, or the filter element assembly is arranged outside the shell.

[0008] In some embodiments of the present invention, the water heater further includes: a mixing valve, a connecting pipe and a water outlet pipe, the water outlet pipe is connected to the inner tank, the mixing valve is connected in series to the water outlet pipe, one end of the connecting pipe is connected to the water inlet pipe and the other end is connected to the mixing valve.

[0009] In one embodiment of the present invention, the one end of the connecting tube is connected between the inner tank and the filter element assembly; or, the one end of the connecting tube is connected upstream of the filter element assembly in the direction of water flow.

[0010] In some embodiments of the present invention, the filter element includes filter material, the filter material is arranged in the shell, the filter material is adsorptive filter material, displacement ion filter material or anti-ion agglomeration filter material; and / or, the filter material is sheet filter material, granular filter material or cotton filter material.

[0011] In some embodiments of the present invention, the filter element further includes an elastic member, which is disposed on a side of the water stop member facing away from the water inlet hole, one end of the elastic member is fixed and the other end abuts against the water stop member to push the water stop member to close the water inlet hole.

[0012] In one embodiment of the present invention, an annular mounting groove is provided on the side of the water stop member facing away from the water inlet hole, the elastic member is a spring, and one end of the spring extends into the mounting groove and is fixedly connected to the water stop member.

[0013] In one embodiment of the present invention, the filter element further includes: a positioning member, which is arranged in the shell and located on the side of the elastic member away from the water stop member, the positioning member is fixed to the shell, and the elastic member is connected between the positioning member and the water stop member.

[0014] In some examples of the present invention, a supporting rib is formed on the inner wall surface of the shell, and the supporting rib extends in a ring shape along the circumference of the shell. The positioning member is arranged on the side of the supporting rib facing the water stop member, and the outer peripheral edge of the positioning member is supported on the supporting rib.

[0015] In some embodiments of the present invention, the filter element includes: a center tube, which is arranged in the shell, and a water hole is formed on the center tube and radially passes through the center tube; a filter material cover, which is arranged in the shell and connected to the center tube, and the filter material cover is located on the side of the center tube facing the water inlet hole, wherein the filter material cover, the outer wall surface of the center tube and the inner wall surface of the shell cooperate to define a filter material cavity for filling filter material, and the inner side of the center tube defines a water outlet channel, the filter material cavity is connected with the water inlet hole, the water outlet channel is connected with the water outlet hole of the shell, and the water outlet channel and the filter material cavity are connected through the water hole.

[0016] In one embodiment of the present invention, a plurality of limiting ribs are provided on the bottom wall inside the shell, and the plurality of limiting ribs are arranged at intervals around the central tube, and the filter material cover has a limiting portion, one end of the central tube is limitedly matched with the limiting portion, and the other end of the central tube is limitedly matched with the inner side of the plurality of limiting ribs.

[0017] In some examples of the present invention, the limiting portion is formed as a limiting groove, and the one end of the center tube is provided with a limiting ring protruding radially outward along the center tube, the limiting ring extends along the circumference of the center tube, and the limiting ring is limitedly fitted in the limiting groove.

[0018] In some embodiments of the present invention, the filter material cover includes a cover body and a first tube portion, the cover body is a plate body arranged perpendicular to the axis of the center tube, the first tube portion is connected to the cover body and extends along the axial direction of the center tube, the inner side of the first tube portion defines an intermediate channel, the shell has a second tube portion, the second tube portion extends along the axial direction of the center tube and defines the water outlet hole on the inner side, the first tube portion and the second tube portion are sealingly sleeved, and the water outlet hole is connected to the water outlet channel through the intermediate channel.

[0019] In some embodiments of the present invention, the filter element mounting seat includes a mounting seat body and a push rod, the mounting seat body is formed with the water inlet interface, the mounting seat body is detachably connected to the filter element, one end of the push rod is connected to the mounting seat body, and the other end of the push rod passes through the water inlet hole and extends into the shell to push the water stop member to open the water inlet hole.

[0020] In some embodiments of the present invention, a valve assembly is provided in the filter element mounting seat, and the valve assembly has an on state and a off state; wherein, after the filter element is assembled with the filter element mounting seat, the valve assembly is in the on state, the water inlet hole is communicated with the water inlet interface, and the water outlet hole of the filter element is communicated with the water outlet interface of the filter element mounting seat; after the filter element is separated from the filter element mounting seat, the valve assembly is in the off state, the water inlet hole is separated from the water inlet interface, and the water outlet hole is separated from the water outlet interface.

[0021] In one embodiment of the present invention, when the filter element is assembled with the filter element mounting seat, the filter element is in contact with and cooperates with the valve assembly so that the valve assembly switches from the cut-off state to the on state.

[0022] In one embodiment of the present invention, in the on state, the water inlet interface is isolated from the water outlet interface; in the off state, the water inlet interface is connected to the water outlet interface.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a pipeline of a water heater when a filter element assembly according to an embodiment of the present invention is arranged in a water heater housing;

[0025] Figure 2 is a schematic diagram of a pipeline of a water heater when a filter element assembly according to an embodiment of the present invention is arranged outside a housing of the water heater;

[0026] Figure 3 is a schematic diagram of a pipeline of a water heater according to an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a pipeline of a water heater with a mixing valve according to another embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a pipeline of a water heater with a water mixing valve according to yet another embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of a filter element assembly according to an embodiment of the present invention;

[0030] Figure 7 is a cross-sectional view of a filter element assembly according to an embodiment of the present invention;

[0031] Figure 8 yes Figure 7 The schematic diagram of the filter element mounting seat and the filter element when disassembled is shown in FIG.

[0032] Fig. 9 yes Figure 7 An exploded view of the filter element assembly shown in ;

[0033] Fig.10 yes Fig. 9 A schematic diagram of the filter element shown in ;

[0034] Fig.11 yes Fig. 9 A schematic diagram of a filter element mounting seat shown in ;

[0035] Fig.12 yes Fig. 9 A schematic diagram of the filter cover shown in ;

[0036] Fig.13 yes Fig. 9 A schematic diagram of another angle of the filter cover shown in FIG.

[0037] Fig.14 yes Fig. 9 A schematic diagram of a first housing shown in ;

[0038] Fig.15 yes Fig. 9 A schematic diagram of another angle of the first housing shown in ;

[0039] Fig.16 yes Fig. 9 A schematic diagram of the central tube shown in ;

[0040] Fig.17 yes Fig. 9 A schematic diagram of another angle of the central tube shown in FIG.

[0041] Fig.18 is a cross-sectional view of a filter element assembly when the filter element according to an embodiment of the present invention has a push rod;

[0042] Fig.19 yes Fig.18 The schematic diagram of the filter element mounting seat and the filter element when disassembled is shown in FIG.

[0043] Fig. 20 yes Fig.18 An exploded view of the filter element assembly shown in ;

[0044] Fig.21 yes Fig. 20 A schematic diagram of the filter element shown in ;

[0045] Fig. 22 yes Fig. 20 A schematic diagram of a filter element mounting seat shown in ;

[0046] Fig.23is a cross-sectional view of a filter element assembly when the filter element according to an embodiment of the present invention has a filter material box;

[0047] Fig.24 yes Fig.23 The schematic diagram of the filter element mounting seat and the filter element when disassembled is shown in FIG.

[0048] Fig.25 yes Fig.23 An exploded view of the filter element assembly shown in ;

[0049] Fig.26 is a schematic diagram of a filter element assembly when a filter element mounting seat is provided with a first stop valve and a second stop valve according to an embodiment of the present invention;

[0050] Fig. 27 yes Fig.26 A cross-sectional view of the filter element and the filter element mounting seat after assembly shown in FIG.

[0051] Fig.28 yes Fig. 27 A cross-sectional view of the filter element mounting seat shown in ;

[0052] Fig.29 yes Fig.26 A cross-sectional view of the filter element and the filter element mounting seat after being assembled when the filter element mounting seat shown in FIG. has a push rod;

[0053] Fig.30 yes Fig.29 A cross-sectional view of the filter element mounting seat shown in ;

[0054] Fig.31 yes Fig.26 The filter element shown in FIG. 1 is a cross-sectional view of the filter element after being assembled with the filter element mounting seat when the filter element has a push rod;

[0055] Fig.32 yes Fig.31 A cross-sectional view of the filter element mounting seat is shown in FIG.

[0056] Reference numerals:

[0057] 10. Filter element mounting seat;

[0058] 11. Mounting seat body; 111. Clamping groove; 12. First stop valve; 121. First valve core; 122. First valve seat; 123. First reset member; 124. First valve core sealing ring; 13. Second stop valve; 131. Second valve core; 132. Second valve seat; 133. Second reset member; 134. Second valve core sealing ring; 14. Push rod; 101. Water inlet interface; 102. Water outlet interface; 103. Communication cavity; 104. Matching cavity; 105. First installation cavity; 106. Second installation cavity;

[0059] 20. Filter element;

[0060] 21. Shell; 211. First shell; 2111. Position-limiting convex rib; 212. Second shell; 2121. Clamping convex; 2122. Water inlet hole; 2123. Water outlet hole; 2124. Second pipe part; 2125. Supporting convex rib;

[0061] 22. Water stop; 23. Elastic member; 24. Positioning member; 25. Filter cover; 251. Cover body; 2511. Limiting groove; 2512. Filter screen; 252. First pipe part; 2521. Middle channel; 26. Center pipe; 261. Limiting ring; 262. Water hole; 27. Filter box; 271. Cover body; 2711. Positioning protrusion; 272. Box body; 2721. Limiting rib; 273. Filter screen; 274. Seventh sealing ring; 275. Eighth sealing ring; 28. One-way valve; 29. ​​Push rod;

[0062] 201, first sealing ring; 202, second sealing ring; 203, third sealing ring; 204, fourth sealing ring; 205, fifth sealing ring; 206, sixth sealing ring; 207, water inlet channel; 208, drainage channel; 209, water outlet channel;

[0063] 100, filter element assembly; 200, water inlet pipe; 300, water outlet pipe; 400, outer shell; 500, inner tank; 600, connecting pipe; 700, mixing valve;

[0064] 1000. Water heater. DETAILED DESCRIPTION

[0065] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0066] Reference below Figure 1-32 The figure illustrates a water heater 1000 according to an embodiment of the first aspect of the present invention.

[0067] refer to Figure 1 and Figure 2As shown, the water heater 1000 according to the first embodiment of the present invention comprises: an inner tank 500 and a filter element assembly 100. Specifically, the inner tank 500 is connected to a water inlet pipe 200; the filter element assembly 100 is connected in series to the water inlet pipe 200, the filter element assembly 100 comprises a filter element mounting seat 10 and a filter element 20 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 101, the filter element 20 comprises a housing 21 and a water stop 22, the housing 21 comprises a first housing 211 and a second housing 212, one end of the first housing 211 is open, the second housing 212 is arranged at the open end of the first housing 211, and the second housing 212 is provided at the open end of the first housing 211. One end of 212 facing the first shell 211 is open and detachably connected to the first shell 211, the shell 21 has a water inlet hole 2122, and the water stop member 22 is arranged in the shell 21 and located at the water inlet hole 2122, wherein when the filter element 20 is separated from the filter element mounting seat 10, the water stop member 22 blocks the water inlet hole 2122, and when the filter element 20 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 22 to open the water inlet hole 2122, so that the water inlet hole 2122 is connected to the water inlet interface 101.

[0068] In this embodiment, when the user uses the water heater 1000 to take a bath, water flows from the water inlet pipe 200 to the filter element assembly 100. Specifically, water enters the water inlet interface 101 of the filter element mounting seat 10 from the water inlet pipe 200, and the water in the water inlet interface 101 enters the filter element 20 from the water inlet hole 2122. The filter element 20 filters the incoming water to filter substances such as chloride ions that irritate human skin from the water. The filtered water can flow into the inner tank 500 of the water heater 1000, and finally the filtered water flows out of the inner tank 500 for the user to use.

[0069] In this embodiment, the filter element assembly 100 is connected in series to the water inlet pipe 200. The filter element assembly 100 filters the water entering the water heater 1000, so that the water flowing out of the water heater 1000 contains very few substances that irritate human skin, thereby effectively avoiding the user from experiencing uncomfortable conditions such as skin itching after bathing, allowing the user to have better bathing comfort and greatly improving the user experience.

[0070] It is understandable that there are usually more calcium and magnesium ions dissolved in water. After heating, these substances dissolved in water will form calcium and magnesium compounds such as calcium carbonate and magnesium carbonate to form scale. The thermal conductivity of scale is very poor. When scale adheres to the heating device in the water heater 1000, the heating efficiency of the heating device will decrease, thereby reducing the use effect of the water heater 1000. In this embodiment, the filter element assembly 100 is connected in series in the water inlet pipe 200. The filter element assembly 100 can filter calcium and magnesium ions and the like in the water, thereby reducing the scale appearing in the water heater 1000, so that the water heater 1000 can maintain good heating efficiency and use effect during long-term use, thereby improving the user experience.

[0071] In this embodiment, a water stop 22 is provided in the filter element assembly 100. The water stop 22 can cooperate with the filter element mounting seat 10 to open and close the water inlet hole 2122. When the filter element 20 is connected to the water inlet pipe 200 through the filter element mounting seat 10, the water inlet hole 2122 in the filter element 20 and the water inlet interface 101 are in a smooth state. When the filter element 20 and the filter element mounting seat 10 are not assembled, the water stop 22 blocks the water inlet hole 2122 on the filter element 20. It can be understood that the filter element 20 needs to be replaced after being used for a period of time to ensure a good filtering effect. When replacing the filter element 20, the filter element 20 is removed from the filter element mounting seat 10, and the water stop 22 can block the water inlet hole 2122, thereby effectively preventing the water in the filter element 20 from spilling out from the water inlet hole 2122 and wetting the user's clothes or the ground, etc., so that the user has a better use experience during the whole process of using the water heater 1000.

[0072] The housing 21 is provided with a detachably connected first housing 211 and a second housing 212, so that the parts such as the water stop 22 in the housing 21 can be assembled into the housing 21 more conveniently and easily, thereby facilitating the assembly of the filter element 20. For example, the first housing 211 and the second housing 212 can be threadedly connected, or the first housing 211 and the second housing 212 can be connected by a sliding bar or a sliding rail. Optionally, the first housing 211 and the second housing 212 can be connected and fixed by ultrasonic welding or spin welding.

[0073] According to the water heater 1000 of the embodiment of the present invention, the filter element assembly 100 is connected in series to the water inlet pipe 200 of the water heater 1000 to filter the incoming water, thereby effectively avoiding the user from experiencing discomfort such as skin itching after bathing, and at the same time reducing the probability of scaling of the water heater 1000. A water stop member 22 that can open and block the water inlet hole 2122 of the filter element 20 is provided in the filter element assembly 100, which can effectively avoid the situation where water in the filter element 20 is spilled from the water inlet hole 2122 when the filter element 20 is replaced. A first shell 211 and a second shell 212 that can be detachably connected are provided in the filter element 20, so that the filter element 20 is more convenient to assemble, thereby allowing the user to have better bathing comfort and greatly improving the user experience.

[0074] In some embodiments of the present invention, reference Figure 1 and Figure 2As shown, the water heater 1000 may include a housing 400, an inner tank 500 is disposed in the housing 400, and a filter element assembly 100 is disposed in the housing 400, or the filter element assembly 100 is disposed outside the housing 400. Thus, the housing 400 is disposed on the water heater 1000, which can facilitate the assembly and arrangement of various components in the water heater 1000, and can also provide good protection for the inner tank 500 and various components, so that the inner tank 500 and various components can be in a relatively closed environment, and maintain a good use state and service life.

[0075] In this embodiment, the filter element assembly 100 can be arranged in the housing 400, or the filter element assembly 100 can be arranged outside the housing 400. The filter element assembly 100 is arranged in the housing 400, and the housing 400 can protect and waterproof the filter element assembly 100, so that the filter element assembly 100 can be used more stably for a long time, and the probability of failure is reduced. At the same time, the number of parts leaking from the water heater 1000 is reduced, so that the water heater 1000 has better integrity, is easy to install and transport, and reduces the extra space occupied by the filter element assembly 100 during external assembly, so that the user experience is better.

[0076] It is understandable that when the water heater 1000 is installed, the housing 400 is generally fixed to the wall by fasteners. Since the water heater 1000 is large in size, the water heater 1000 is generally not easily removed after installation. The filter element assembly 100 is arranged outside the housing 400, so that when the user replaces the filter element 20, the user only needs to remove the filter element 20 from the filter element mounting seat 10 to replace it. The user can complete the operation of replacing the filter element 20 alone with less physical effort, so that the user can have a good experience when replacing and maintaining the water heater 1000. The actual arrangement of the filter element assembly 100 in the water heater 1000 can be personalized according to the user's personal needs, and the arrangement of the filter element assembly 100 is not specifically limited here.

[0077] In some embodiments of the present invention, reference Figure 3-Figure 5 As shown, the water heater 1000 may also include: a mixing valve 700, a connecting pipe 600 and a water outlet pipe 300, the water outlet pipe 300 is connected to the inner tank 500, the mixing valve 700 is connected in series to the water outlet pipe 300, one end of the connecting pipe 600 is connected to the water inlet pipe 200 and the other end is connected to the mixing valve 700.

[0078] It is understandable that when using the water heater 1000, the user needs water with different temperatures. In this embodiment, the water mixing valve 700 is connected in series to the water outlet pipe 300, and the connecting pipe 600 is used to guide the cold water in the water inlet pipe 200 to the water mixing valve 700, so that the cold water and the hot water in the water outlet pipe 300 can be mixed, so that the water flowing out of the water outlet pipe 300 can have different temperatures due to the different amounts of mixed cold water, thereby well meeting the user's needs for different water temperatures. The water mixing valve 700 and the connecting pipe 600 have a simple structure and good use effect. Optionally, the water mixing valve 700 may not be provided in the water heater 1000.

[0079] In one embodiment of the present invention, reference Figure 4 As shown, one end of the connecting pipe 600 can be connected between the inner tank 500 and the filter element assembly 100. Therefore, when the water heater 1000 is in operation, after the water in the water inlet pipe 200 passes through the filter element assembly 100, part of the water flows into the inner tank 500 and flows from the inner tank 500 to the water outlet pipe 300, and part of the water flows from the connecting pipe 600 to the mixing valve 700. Finally, the water from the inner tank 500 and the water from the connecting pipe 600 are mixed in the mixing valve 700 and flow out from the water outlet pipe 300.

[0080] In this embodiment, one end of the connecting tube 600 is connected between the inner tank 500 and the filter element assembly 100, so that the water entering the inner tank 500 and the water entering the connecting tube 600 are both filtered by the filter element assembly 100, so that the water flowing out of the outlet pipe 300 is cleaner and of higher quality, further reducing the probability of users experiencing itching after bathing with the water output from the water heater 1000, allowing users to have better bathing comfort, thereby further improving the user experience.

[0081] In one embodiment of the present invention, reference Figure 5 As shown, one end of the connecting pipe 600 can be connected to the upstream of the filter element assembly 100 in the water flow direction. Therefore, when the water heater 1000 is in operation, part of the water in the water inlet pipe 200 flows into the inner tank 500 through the filter element assembly 100 and flows from the inner tank 500 to the water outlet pipe 300, and part of the water in the water inlet pipe 200 flows from the connecting pipe 600 to the mixing valve 700, and finally the water from the inner tank 500 and the water from the connecting pipe 600 are mixed in the mixing valve 700 and flow out from the water outlet pipe 300.

[0082] In this embodiment, one end of the connecting pipe 600 is connected to the filter element assembly 100 upstream of the water flow direction of the water inlet pipe 200, so that the filter element assembly 100 only filters the incoming water entering the inner tank 500 of the water heater 1000. This can reduce the filtering burden of the filter element assembly 100 and extend the service life of the filter element 20, thereby reducing the user's usage cost to a certain extent.

[0083] In this embodiment, the connection position relationship between the connecting pipe 600 and the filter element assembly 100 and the inner tank 500 can be reasonably selected according to the actual needs of the user, and no specific restrictions are made here.

[0084] In some embodiments of the present invention, the filter element 20 may include filter material, the filter material is arranged in the housing 21, and the filter material is an adsorptive filter material, a displacement ion filter material or an anti-ion agglomeration filter material. Therefore, by setting the filter material in the filter element 20, the filter element 20 can achieve a good filtering effect on water, thereby allowing the user to obtain a good use experience. The adsorptive filter material has a good adsorption and purification effect, low cost, and the displacement ion filter material or the anti-ion agglomeration filter material has a long service life and can well improve the water quality. For example, the filter material can be an adsorptive material such as PP cotton (Poly series artificial chemical fiber), activated carbon, etc., and the filter material can also be selected from resin, TAC (Template Assisted Crystallization module assisted crystallization), ASP (aspartic acid), MSAP (solid scale inhibition and slow release material) and other displacement ion filter materials or anti-ion agglomeration filter materials.

[0085] In one embodiment of the present invention, the filter material can be a sheet filter material, a granular filter material or a cotton filter material. Therefore, the filter material can be a sheet filter material, a granular filter material or a cotton filter material, and the filter material has less interception effect on the water flow, and the water flow can flow through the filter material and out of the filter element 20 more smoothly, so that the water inlet of the water heater 1000 is smoother, and the water heater 1000 can operate stably and normally.

[0086] In some embodiments of the present invention, Figure 7 and Figure 8 As shown, the filter element 20 may further include an elastic member 23 , which is disposed on a side of the water stop member 22 away from the water inlet hole 2122 , with one end of the elastic member 23 being fixed and the other end abutting against the water stop member 22 to push the water stop member 22 to close the water inlet hole 2122 .

[0087] Therefore, the elastic member 23 is set to push the water stop member 22 to close the water inlet hole 2122, so that when the filter element 20 is separated from the filter element mounting seat 10, the water stop member 22 can automatically re-seal the water inlet hole 2122 under the action of the elastic member 23, thereby reducing the user's manual operation and making it more convenient and easy for the user to replace the filter element 20.

[0088] In one embodiment of the present invention, Figure 7 and Figure 8As shown, a circular mounting groove may be provided on the side of the water stop 22 away from the water inlet 2122, and the elastic member 23 is a spring, one end of which extends into the mounting groove and is fixedly connected to the water stop 22. When the filter element 20 of this embodiment is assembled, the elastic member 23 may be pre-assembled with the water stop 22 and then fixedly assembled into the housing 21. Specifically, the upper end of the elastic member 23 extends into the mounting groove and is connected and fixed to the water stop 22, and the elastic member 23 and the water stop 22 are then installed into the housing 21 together, so that the water stop 22 abuts against the water inlet 2122. The mounting groove is provided on one side of the water stop 22 and one end of the elastic member 23 extends into the mounting groove, so that the connection between the elastic member 23 and the water stop 22 can be more reliable, and relative displacement can be better avoided, so that the elastic member 23 can reliably and stably support and press the water stop 22, so that the water stop 22 can stably and reliably block the water inlet 2122. The elastic member 23 is configured as a spring, which has a simple structure and good stability.

[0089] In one embodiment of the present invention, Figure 7-Figure 9 As shown, the filter element 20 may further include: a positioning member 24, which is disposed in the shell 21 and located on the side of the elastic member 23 away from the water stop member 22, the positioning member 24 is fixed to the shell 21, and the elastic member 23 is connected between the positioning member 24 and the water stop member 22.

[0090] It can be understood that the sealing effect of the water stop member 22 on the water inlet hole 2122 greatly affects the situation of water stored in the filter element 20 spilling out when the filter element 20 is replaced. In this embodiment, the positioning member 24 is fixed to the shell 21, and the positioning member 24 can reliably support and fix the elastic member 23, so that the elastic member 23 can stably and reliably support the water stop member 22 and make the water stop member 22 securely abut and seal the water inlet hole 2122, so that the filter element 20 can effectively and stably prevent the water stored in the filter element 20 from spilling out when it is replaced, thereby improving the user experience when replacing the filter element 20.

[0091] In some examples of the present invention, Figure 7-Figure 9 As shown, a supporting rib 2125 may be formed on the inner wall surface of the housing 21, and the supporting rib 2125 extends in a ring shape along the circumference of the housing 21. The positioning member 24 is arranged on the side of the supporting rib 2125 facing the water stop member 22, and the outer peripheral edge of the positioning member 24 is supported on the supporting rib 2125. Therefore, the supporting rib 2125 is arranged in a ring shape and supports the outer peripheral edge of the positioning member 24, so that the positioning member 24 can be supported on the supporting rib 2125 as a whole in a relatively stable manner. The supporting rib 2125 has a simple structure, is easy to process and shape, and has stable support.

[0092] In some embodiments of the present invention, Figure 7-Figure 9As shown, the filter element 20 may include: a central tube 26 and a filter material cover 25, the central tube 26 is arranged in the shell 21, and a water hole 262 is formed on the central tube 26 which radially passes through the central tube 26; the filter material cover 25 is arranged in the shell 21 and connected to the central tube 26, the filter material cover 25 is located on the side of the central tube 26 facing the water inlet hole 2122, wherein the outer wall surface of the filter material cover 25 and the central tube 26 cooperates with the inner wall surface of the shell 21 to define a filter material cavity for filling the filter material, the inner side of the central tube 26 defines a water outlet channel 209, the filter material cavity is connected to the water inlet hole 2122, the water outlet channel 209 is connected to the water outlet hole 2123 of the shell 21, and the water outlet channel 209 and the filter material cavity are connected through the water hole 262.

[0093] Therefore, when the water heater 1000 is in operation, the water in the water inlet pipe 200 flows from the water inlet interface 101 to the water inlet hole 2122 and enters the filter material cavity. The filter material in the filter material cavity filters the incoming water, and the filtered water flows from the water hole 262 to the water outlet channel 209. The filtered water flows along the water outlet channel 209 to the water outlet hole 2123 and flows out from the water outlet hole 2123.

[0094] In this embodiment, a central tube 26 and a filter material cover 25 are arranged in the shell 21. A filter material cavity for storing filter material is defined by the central tube 26, the filter material cover 25 and the shell 21. The filter material can be conveniently and stably stored in the filter material cavity, thereby ensuring the use effect of the filter material. The structure is simple and the use effect is good.

[0095] In one embodiment of the present invention, Fig.12 As shown, a through hole penetrating the filter cover 25 may be formed on the filter cover 25, and the filter element 20 may further include a filter screen 2512, which is arranged on the filter cover 25 and covers the through hole. In this way, the water entering the filter element 20 can be preliminarily filtered at the filter screen 2512 before entering the filter cavity. The filter screen 2512 filters larger particles in the water, such as silt and suspended matter, from the water, so that the filter material in the filter cavity has a better use condition, which is conducive to extending the use time of the filter material, and to a certain extent, the service life of the filter element 20 is longer. At the same time, the filter screen 2512 can play a role in closing the filter cavity, so that the filter material can be stably filled in the filter cavity. Optionally, the filter screen 2512 can be a stainless steel filter screen 2512 with a mesh size of 30-100.

[0096] In one embodiment of the present invention, Fig.14 and Fig.15 As shown, a plurality of limiting ribs 2111 may be provided on the bottom wall inside the shell 21, and the plurality of limiting ribs 2111 are arranged at intervals around the central tube 26, and the filter cover 25 has a limiting portion, one end of the central tube 26 is limitedly matched with the limiting portion, and the other end of the central tube 26 is limitedly matched with the inner side of the plurality of limiting ribs 2111.

[0097] Therefore, a plurality of limiting ribs 2111 are arranged around the circumference of the center tube 26, so that when water flows through the filter material to impact the center tube 2620, the limiting ribs 2111 and the limiting parts can prevent the displacement of the center tube 26 from both ends of the center tube 26, thereby reducing the probability of excessive displacement of the center tube 26 caused by water flow impacting the center tube 26, so that the center tube 26 can be stably assembled in the filter element 20, so that the filter element 20 can operate stably and well for a long time.

[0098] In some examples of the present invention, Fig.14 and Fig.15 As shown, in the radial direction of the central tube 26, one end of the limiting rib 2111 can be connected to the peripheral wall of the filter material cavity, and the other end of the limiting rib 2111 extends toward the central tube 26 along the radial direction of the central tube 26. In this way, the limiting rib 2111 can have a better structural strength, so that the limiting rib 2111 can better play the role of limiting support for the central tube 26, and effectively reduce the probability of crushing the limiting rib 2111 when the central tube 26 is displaced.

[0099] In some examples of the present invention, Fig.13 and Fig.16 As shown, the limiting portion can be formed as a limiting groove 2511, and one end of the central tube 26 is provided with a limiting ring 261 protruding outward along the radial direction of the central tube 26, and the limiting ring 261 extends along the circumferential direction of the central tube 26, and the limiting ring 261 is limited and matched in the limiting groove 2511. In this way, the contact area between the central tube 26 and the limiting groove 2511 can be increased, and the limiting effect of the limiting groove 2511 on the central tube 26 can be further improved, so that the cooperation between the central tube 26 and the limiting groove 2511 is more stable.

[0100] In one example of the present invention, Fig.17 As shown, the stop ring 261 may have a hollow hole that passes through the stop ring 261 along the extension direction of the central tube 26. This can provide an escape channel for the water flow, so that the water flow can pass through the hollow hole into the filter material cavity. At the same time, the mass of the stop ring 261 can be reduced, thereby reducing the torque generated by the gravity on the stop ring 261 on the central tube 26 when the filter element 20 moves, thereby making the internal structure of the filter element 20 more stable.

[0101] In one example of the present invention, Fig.17As shown, the limiting ring 261 may include a ring portion and a plurality of connecting ribs, the ring portion extending in a ring shape along the circumference of the central tube 26, the plurality of connecting ribs extending in the radial direction of the central tube 26 and arranged at intervals along the circumference of the central tube 26, the ring portion is connected to the outer wall surface of the central tube 26 through a plurality of connecting ribs, and a hollow hole is formed between two adjacent connecting ribs. For example, the connecting ribs may be two, three or four, etc., so that the area of ​​the hollow hole can be larger, thereby reducing the obstruction of the limiting ring 261 to the water flow into the filter material cavity, thereby improving the filtering efficiency of the filter element 20, and greatly improving the user experience. Preferably, four connecting ribs are provided.

[0102] In some embodiments of the present invention, Fig. 9 and Fig.13 As shown, the filter material cover 25 may include a cover body 251 and a first tube portion 252. The cover body 251 is a plate body arranged perpendicular to the axis of the center tube 26. The first tube portion 252 is connected to the cover body 251 and extends along the axial direction of the center tube 26. The inner side of the first tube portion 252 defines an intermediate channel 2521. The shell 21 has a second tube portion 2124. The second tube portion 2124 extends along the axial direction of the center tube 26 and defines a water outlet 2123 on the inner side. The first tube portion 252 and the second tube portion 2124 are sealed and sleeved, and the water outlet 2123 is connected to the water outlet channel 209 through the intermediate channel 2521.

[0103] In this embodiment, after the filter material filters the water flow, the water flow enters the water outlet channel 209 from the water hole 262 and flows out from the water outlet hole 2123 through the middle channel 2521. The sealing sleeve connection between the first tube portion 252 and the second tube portion 2124 can isolate the unfiltered water from the filtered water, preventing the water from flowing out of the water outlet hole 2123 without being filtered, thereby ensuring the filtering effect of the filter element 20.

[0104] In one embodiment of the present invention, Fig.10 As shown, the water inlet hole 2122 can be arranged around the water outlet hole 2123, and the water stopper 22 extends in a ring shape along the circumference of the housing 21. The water inlet hole 2122 is arranged around the water outlet hole 2123, so that the overall structure of the filter element 20 can be arranged more compactly, thereby simplifying the structure of the filter element 20, reducing the volume of the filter element 20, and making the filter element 20 more convenient to assemble and use.

[0105] In some embodiments of the present invention, Figure 7As shown, the filter element 20 may further include a one-way valve 28, which is disposed at the water outlet 2123. The one-way valve 28 is configured to open the water outlet 2123 when the pressure in the housing 21 reaches a preset pressure. The preset pressure refers to the pressure at which the one-way valve 28 remains open when the water in the filter element 20 flows normally in the filter element 20 and the filter element mounting seat 10 during normal use of the filter element 20 and when the water in the filter element 20 flows toward the water inlet 2122. In this embodiment, the preset pressure is 0.05Mpa. When the pressure in the housing 21 is greater than 0.05Mpa, the one-way valve 28 opens the water outlet 2123.

[0106] In this embodiment, after the filter element 20 is installed on the filter element mounting seat 10, the water stop member 22 opens the water inlet hole 2122 under the thrust of the filter element mounting seat 10, so that the water in the water inlet pipe 200 flows into the filter element 20 from the water inlet hole 2122, and the filter material in the filter element 20 filters the incoming water, and then the filtered water flows to the water outlet hole 2123, and the one-way valve 28 opens under the action of water pressure, so that the filtered water passes through the one-way valve 28 and flows out from the water outlet hole 2123 to the water inlet pipe 200 and continues to flow along the pipeline.

[0107] When the user replaces the filter element 20, the user removes the filter element 20 from the filter element mounting seat 10, and the water stop member 22 blocks the water inlet hole 2122. Since the pressure of the water in the filter element 20 on the one-way valve 28 does not reach the preset pressure, the one-way valve 28 is in a state of closing the water outlet hole 2123, so that the water in the filter element 20 can be well stored in the filter element 20, and the user can better replace the filter element 20.

[0108] Therefore, a one-way valve 28 is provided at the water outlet 2123 of the filter element 20, so as to further enhance the sealing effect of the filter element 20 and effectively prevent the water in the filter element 20 from spilling out from the water outlet 2123, thereby providing the user with a good user experience when replacing the filter element 20.

[0109] In some embodiments of the present invention, Figure 7-Figure 9 As shown, the filter element mounting seat 10 may include a mounting seat body 11 and a push rod 14. The mounting seat body 11 is formed with a water inlet interface 101. The mounting seat body 11 is detachably connected to the filter element 20. One end of the push rod 14 is connected to the mounting seat body 11, and the other end of the push rod 14 passes through the water inlet hole 2122 and extends into the shell 21 to push the water stop member 22 to open the water inlet hole 2122.

[0110] Therefore, after the filter element 20 is assembled with the filter element mounting seat 10, the push rod 14 can easily open the water stop 22 in the filter element 20, so that the water inlet interface 101 is connected to the water inlet hole 2122. The structure of the push rod 14 and the water stop 22 is simple and reliable. The mounting seat body 11 and the filter element 20 are set to be detachable, so that the filter element 20 can be easily detached from the mounting seat body 11 when replaced, so that it is more convenient and easy for the user to replace the filter element 20. For example, the mounting seat body 11 can be connected to the filter element 20 by fasteners, the mounting seat body 11 can also be connected and fixed to the filter element 20 by a snap-fit ​​method, the mounting seat body 11 can also be connected to the filter element 20 by threads, and other detachable connection methods are not listed here one by one.

[0111] Of course, the filter element mounting seat 10 may not be provided with the top rod 14, and the water stop member 22 can open the water inlet hole 2122 under the impact of the water flow, referring to Fig. 27 As shown, when the pressure of the water flow on the water stop 22 reaches a preset value, the water flow can push open the water stop 22, so that the water inlet hole 2122 is unblocked, and the filter element 20 can be filled with water, which can further simplify the structure of the filter element mounting seat 10, which is conducive to simplifying the design and reducing the processing and manufacturing costs. In this embodiment, the preset value of the water inlet pressure is set to 0.05Mpa.

[0112] In one embodiment of the present invention, Figure 7 As shown, the mounting seat body 11 can be integrally formed with the push rod 14. Therefore, the mounting seat body 11 and the push rod 14 are integrally formed, so that the integrity of the filter element mounting seat 10 is better, it is easy to take and put, and the filter element mounting seat 10 and the filter element 20 are more convenient and easy to assemble, which is conducive to improving the assembly efficiency of the filter element 20 and the filter element mounting seat 10.

[0113] In some embodiments of the present invention, Figure 8 As shown, the filter element mounting seat 10 may have a matching cavity 104 with one side open, and one end of the shell 21 extends into the matching cavity 104 and is rotatably engaged with the filter element mounting seat 10. Therefore, by setting the matching cavity 104 on the filter element mounting seat 10, the water inlet hole 2122 can be protected inside the matching cavity 104 to prevent dirt from entering the water inlet hole 2122. At the same time, the shell 21 extends into the matching cavity 104 for installation. When installing the shell 21, the installation position can be visually seen, thereby facilitating the installation of the shell 21 and improving the installation efficiency. The filter element 20 is installed and fixed to the filter element mounting seat 10 by a rotating engaging method, which is convenient for assembly and convenient for the filter element 20 to be detached from the filter element mounting seat 10 when replacing.

[0114] In one embodiment of the present invention, Figure 6 and Figure 8As shown, a guide surface and a clamping groove 111 may be formed on the peripheral wall of the matching cavity 104, the guide surface extends spirally toward the bottom wall of the matching cavity 104 along the circumference of the matching cavity 104, the clamping groove 111 is located at one end of the guide surface facing the bottom wall of the matching cavity 104 and is connected to the guide surface, and a clamping protrusion 2121 is provided on the outer peripheral surface of the housing 21, and the clamping protrusion 2121 is suitable for sliding along the guide surface into the clamping groove 111. Thus, the matching cavity 104 and the housing 21 are clamped and connected through the clamping groove 111 and the clamping protrusion 2121, so that the housing 21 can be connected and fixed with the matching cavity 104 more stably and reliably, and the guide surface is set to extend spirally toward the bottom wall of the matching cavity 104, so that the housing 21 is not easy to slip and loosen in the direction from the matching cavity 104 to the housing 21, so that the housing 21 is more firmly and reliably connected to the filter element mounting seat 10, so that the filter element 20 can maintain a good connection and fixing state with the filter element mounting seat 10 during long-term use.

[0115] In some examples of the present invention, Figure 6 and Fig.10 As shown, the number of the protrusions 2121, the guide surfaces and the slots 111 are all multiple and correspond one to one. This allows the filter element 20 and the mounting seat body 11 to be more firmly connected. For example, the protrusions 2121 can be provided with two, three, four or more, etc., the guide surfaces can be provided with two, three, four or more, etc., and the slots 111 can be provided with two, three, four or more, etc.

[0116] In some embodiments of the present invention, Figure 6 and Fig.10 As shown, the locking protrusion 2121 extends along the circumferential direction of the matching cavity 104, and the two ends of the locking protrusion 2121 are respectively a first end and a second end. In the direction from the first end to the second end, the end surface of the second end is an inclined surface that extends obliquely toward the bottom wall of the matching cavity 104. In this way, when the first end enters the locking groove 111, the first end can be firmly stuck in the inside of the locking groove 111, thereby effectively preventing the filter element 20 from being separated from the filter element mounting seat 10, and the second end is an inclined surface. When the filter element 20 is disassembled, the inclined surface can facilitate the movement of the locking protrusion 2121 on the guide surface and the positioning surface, thereby facilitating the disassembly of the filter element 20.

[0117] In some embodiments of the present invention, Figure 27-Figure 32 As shown, a valve assembly is provided in the filter element mounting seat 10, and the valve assembly has a conducting state and a shutoff state; wherein, after the filter element 20 is assembled with the filter element mounting seat 10, the valve assembly is in the conducting state, the water inlet hole 2122 is connected with the water inlet interface 101, and the water outlet hole 2123 of the filter element 20 is connected with the water outlet interface 102 of the filter element mounting seat 10; after the filter element 20 is separated from the filter element mounting seat 10, the valve assembly is in the shutoff state, the water inlet hole 2122 is separated from the water inlet interface 101, and the water outlet hole 2123 is separated from the water outlet interface 102.

[0118] Thus, by setting the valve assembly in the valve core mounting seat, after the filter element 20 is assembled with the filter element mounting seat 10, water can enter the filter element 20 from the water inlet hole 2122 to be purified and flow out from the water outlet hole 2123, and the filter element 20 can perform filtering operations well. When the filter element 20 needs to be replaced, the user removes the filter element 20 from the filter element mounting seat 10, and the valve assembly in the filter element mounting seat 10 is in a cut-off state, the water inlet hole 2122 is isolated from the water inlet interface 101, and the water outlet hole 2123 is isolated from the water outlet interface 102, so that the water in the water inlet pipe 200 and the water outlet pipe 300 can be prevented from spilling from the water inlet interface 101 and the water outlet interface 102, so that the user can operate more conveniently and easily when replacing the filter element 20, thereby improving the user's experience throughout the process.

[0119] In one embodiment of the present invention, Figure 27-Figure 32 As shown, when the filter element 20 is assembled with the filter element mounting seat 10, the filter element 20 contacts and cooperates with the valve assembly so that the valve assembly switches from the cut-off state to the on state. In this way, the state of the valve assembly can be switched timely and reliably according to the assembly state of the filter element 20 and the filter element mounting seat 10, so that the state of the valve assembly can be well matched with the assembly or replacement of the filter element 20, so that the user has a better use experience.

[0120] In one embodiment of the present invention, Figure 27-Figure 32 As shown, in the on state, the water inlet interface 101 is isolated from the water outlet interface 102 ; in the off state, the water inlet interface 101 is connected to the water outlet interface 102 .

[0121] In this embodiment, when the filter element 20 is separated from the filter element mounting seat 10, the valve assembly is in a cut-off state, the valve assembly separates the water inlet hole 2122 from the water inlet interface 101 and separates the water outlet hole 2123 from the water outlet interface 102. At the same time, the water inlet interface 101 is connected to the water outlet interface 102. In this way, the water flow in the water inlet pipe 200 can flow from the water inlet interface 101 to the water outlet interface 102 and then flow normally and stably in the pipeline, so that the user can replace the filter element 20 without stopping the water supply, making it more convenient and easy for the user to replace the filter element 20.

[0122] In one embodiment of the present invention, Figure 27-Figure 32As shown, a first installation cavity 105, a second installation cavity 106 and a connecting cavity 103 may be formed in the filter element mounting seat 10, and the first installation cavity 105 and the second installation cavity 106 are separated from each other. The valve assembly may include a first stop valve 12 and a second stop valve 13. The first installation cavity 105 is provided with a first stop valve 12, and the first stop valve 12 includes a first valve seat 122 and a first valve core 121. A first connecting channel connected to the water inlet interface 101 is formed in the first valve seat 122, and the first valve core 121 is movably arranged in the first connecting channel between a first position and a second position. A second stop valve 13 is provided in the second installation cavity 106, and the second stop valve 13 includes a second valve seat 132 and a second valve core 131. A second connecting channel connected to the water outlet interface 102 is formed in the second valve seat 132, and the second valve core 131 is movably arranged in the second connecting channel between a third position and a fourth position.

[0123] Among them, when the valve assembly is in the conducting state, the first valve core 121 is in the first position and the second valve core 131 is in the third position, the first connecting channel connects the water inlet interface 101 and the water inlet hole 2122, the second connecting channel connects the water outlet interface 102 and the water outlet hole 2123, and the first connecting channel and the second connecting channel are both separated from the connecting cavity 103; when the valve assembly is in the cut-off state, the first valve core 121 is in the second position and the second valve core 131 is in the fourth position, the first connecting channel is separated from the water inlet hole 2122, the second connecting channel is separated from the water outlet hole 2123, and the first connecting channel and the second connecting channel are connected through the connecting cavity 103.

[0124] In this embodiment, after the filter element 20 is assembled with the filter element mounting seat 10, Fig. 27 As shown, the filter element 20 contacts the first valve core 121 and the second valve core 131, so that the first valve core 121 is in the first position and the second valve core 131 is in the third position, the first connecting channel connects the water inlet interface 101 and the water inlet hole 2122, and the second connecting channel connects the water outlet interface 102 and the water outlet hole 2123. At the same time, the water inlet interface 101 and the water outlet interface 102 are both isolated from the connecting cavity 103. In this way, the water flow in the water inlet pipe 200 flows from the water inlet interface 101 through the first connecting channel to the water inlet hole 2122 and enters the filter element 20. The filter element 20 filters the incoming water, and the filtered water flows from the water outlet hole 2123 to the second connecting channel and enters the water outlet interface 102. Finally, the water flows out from the water outlet interface 102 and continues to flow in the pipeline.

[0125] After the filter element 20 is separated from the filter element mounting seat 10, Fig.28As shown, the filter element 20 does not contact the first valve core 121 and the second valve core 131, so that the first valve core 121 switches to the second position and the second valve core 131 switches to the fourth position, the first connecting channel is separated from the water inlet hole 2122, and the second connecting channel is separated from the water outlet hole 2123. At the same time, the connecting cavity 103 connects the first connecting channel and the second connecting channel. In this way, the water flow in the water inlet pipe 200 can flow from the water inlet interface 101 through the connecting cavity 103 to the water outlet interface 102, and finally the water flows out from the water outlet interface 102 and continues to flow in the pipeline.

[0126] This allows the user to replace the filter element 20 without having to stop the water supply, making replacement of the filter element 20 more convenient and easier, thereby providing the user with a better experience.

[0127] Furthermore, if Figure 27-Figure 32 As shown, the first stop valve 12 is provided with a first reset member 123 and two first valve core 121 sealing rings. The first reset member 123 is sleeved on the radial outer side of the first valve core 121, and a first valve core 121 sealing ring is sleeved on the upper and lower ends of the radial outer side of the first valve core 121, and the two first valve core 121 sealing rings are arranged at intervals along the upper and lower directions of the first valve core 121. In this way, when the filter element 20 is installed on the filter element mounting seat 10, the first valve core 121 is in the first position, and the first reset member 123 stores elastic force. When the filter element 20 is removed from the filter element mounting seat 10, the first reset member 123 releases the elastic force, and the first reset member 123 resets the first valve core 121 from the first position to the second position, so that water can flow normally in the filter element mounting seat 10, and the first valve core 121 sealing ring can seal the matching gap between the first valve core 121 and the first valve seat 122, so as to prevent water from flowing out of the filter element assembly 100 from the matching gap between the first valve core 121 and the first valve seat 122.

[0128] For example, Fig. 27 As shown, when the first valve core 121 is in the first position, the first valve core 121 sealing ring at the lower end of the first valve core 121 seals the fitting gap between the first valve core 121 and the first valve seat 122, and water enters the filter element 20 from the first connecting channel, preventing water from entering the connecting cavity 103 from the first connecting channel; when the first valve core 121 is in the second position, the first valve core 121 sealing ring at the upper end of the first valve core 121 seals the fitting gap between the first valve core 121 and the first valve seat 122, and water enters the connecting cavity 103 from the first connecting channel, preventing water from flowing out of the filter element mounting seat 10 from the first connecting channel.

[0129] Furthermore, if Figure 27-Figure 32As shown, the second stop valve 13 is provided with a second reset member 133 and two second valve core 131 sealing rings. The second reset member 133 is sleeved on the radial outer side of the second valve core 131, and a second valve core 131 sealing ring is sleeved on the upper and lower ends of the radial outer side of the second valve core 131, and the two second valve core 131 sealing rings are arranged at intervals along the upper and lower directions of the second valve core 131. In this way, when the filter element 20 is installed on the filter element mounting seat 10, the second valve core 131 is in the third position, and the second reset member 133 stores elastic force. When the filter element 20 is removed from the filter element mounting seat 10, the second reset member 133 releases the elastic force, and the second reset member 133 resets the second valve core 131 from the third position to the fourth position, so that water can flow normally in the filter element mounting seat 10, and the second valve core 131 sealing ring can seal the matching gap between the second valve core 131 and the second valve seat 132, so as to prevent water from flowing out of the filter element assembly 100 from the matching gap between the second valve core 131 and the second valve seat 132.

[0130] For example, Fig.28 As shown, when the second valve core 131 is in the third position, the second valve core 131 sealing ring at the lower end of the second valve core 131 seals the fitting gap between the second valve core 131 and the second valve seat 132, and water flows out of the filter element 20 from the second connecting channel after being filtered by the filter element 20. When the second valve core 131 is in the fourth position, the second valve core 131 sealing ring at the upper end of the second valve core 131 seals the fitting gap between the second valve core 131 and the second valve seat 132, and water enters the second connecting channel from the connecting cavity 103, ensuring that water flows normally in the filter element mounting seat 10.

[0131] In some embodiments of the present invention, Fig.18 and Fig.21 As shown, a guide hole penetrating the housing 21 may be formed on the housing 21, and the filter element 20 may include: a push rod 29, one end of the push rod 29 is fixed to the water stop 22 and the other end is inserted into the guide hole. When the filter element 20 is separated from the filter element mounting seat 10, the other end of the push rod 29 extends out of the housing 21. When the filter element 20 is connected to the filter element mounting seat 10, the filter element mounting seat 10 abuts against the push rod 29 and pushes the water stop 22 through the push rod 29 to open the water inlet hole 2122. Therefore, by providing a guide hole on the housing 21 and inserting the push rod 29 therein, when the filter element 20 is assembled with the filter element mounting seat 10, the filter element mounting seat 10 pushes the push rod 29 to open the water stop 22 through the push rod 29, thereby reducing the assembly positioning accuracy of the push rod 29 and the filter element mounting seat 10, making it more convenient to assemble the filter element 20 and the filter element mounting seat 10, and the assembly efficiency is higher.

[0132] In some examples of the present invention, Fig.21As shown, the number of push rods 29 can be multiple, and the multiple push rods 29 are arranged at intervals along the circumference of the housing 21. For example, the number of push rods 29 can be two, three or four, etc. In this way, each push rod 29 can push the water stop member 22 to open the water inlet hole 2122, so that the water stop member 22 can open the water inlet hole 2122 more stably and reliably when the filter element 20 and the filter element mounting seat 10 are connected, thereby improving the reliability of the filter element assembly 100 when working. At the same time, multiple push rods 29 apply force to the water stop member 22 in the circumferential direction, which can make the gap between the water stop member 22 and the water inlet hole 2122 more uniform, so that the water flow impact force on the water stop member 22 is more uniform, thereby reducing the probability of failure of the connection between the water stop member 22 and the elastic member 23, and reducing the failure rate of the filter element assembly 100. Preferably, there are three push rods 29, and the three push rods 29 are arranged at intervals along the circumference of the housing 21.

[0133] In some examples of the present invention, reference Fig. 9 and Fig.13 As shown, a first sealing groove may be formed on the cover body 251, a first sealing ring 201 is arranged in the first sealing groove, the first sealing groove extends around the filter cover 25, and the first sealing ring 201 abuts between the groove wall of the first sealing groove and the inner peripheral wall of the housing 21. Thus, by providing the first sealing groove, a layout space can be provided for the first sealing ring 201, reducing the probability of displacement of the first sealing ring 201 between the filter cover 25 and the inner peripheral wall of the housing 21. By providing the first sealing ring 201, sealing between the filter cover 25 and the inner peripheral wall of the housing 21 can be achieved, thereby preventing water from entering the filter cavity without being filtered by the filter screen 2512, thereby reducing the filtering effect and the service life of the filter element 20.

[0134] In some examples of the present invention, Figure 8 As shown, a second sealing groove may be formed on the outer peripheral wall of the first tube portion 252, the second sealing groove extends around the first tube portion 252, a second sealing ring 202 is arranged in the second sealing groove, and the second sealing ring 202 abuts between the groove wall of the second sealing groove and the inner wall surface of the second tube portion 2124. Therefore, by providing the second sealing groove, a layout space can be provided for the second sealing ring 202, and the probability of displacement of the second sealing ring 202 between the first tube portion 252 and the second tube portion 2124 can be reduced. By providing the second sealing ring 202, the sealing between the first tube portion 252 and the second tube portion 2124 can be achieved.

[0135] In some examples of the present invention, Figure 8As shown, a third sealing groove may be formed on the outer peripheral wall of the one-way valve 28, the third sealing groove extends around the one-way valve 28, a third sealing ring 203 is arranged in the third sealing groove, and the third sealing ring 203 abuts between the groove wall of the third sealing groove and the inner wall surface of the second pipe portion 2124. By providing the third sealing groove, a layout space can be provided for the third sealing ring 203, reducing the probability of displacement of the third sealing ring 203 between the one-way valve 28 and the second pipe portion 2124. By providing the third sealing ring 203, the one-way valve 28 and the second pipe portion 2124 can be sealed, thereby ensuring the filtering effect of the filter element 20.

[0136] In one embodiment of the present invention, Figure 8 As shown, a fourth sealing groove is formed on the inner wall of the first housing 211, and the fourth sealing groove extends around the inner wall of the first housing 211. A fourth sealing ring 204 is provided in the fourth sealing groove, and the fourth sealing ring 204 abuts between the groove wall of the fourth sealing groove and the outer wall of the second housing 212. Thus, by providing the fourth sealing groove, a layout space can be provided for the fourth sealing ring 204, and the probability of displacement of the fourth sealing ring 204 between the first housing 211 and the second housing 212 can be reduced. By providing the fourth sealing ring 204, the sealing between the first housing 211 and the second housing 212 can be achieved, thereby ensuring the filtering effect of the filter element 20.

[0137] In one embodiment of the present invention, Figure 8 As shown, a fifth sealing groove is formed on the outer peripheral wall of the second housing 212, and the fifth sealing groove extends around the second housing 212. A fifth sealing ring 205 is arranged in the fifth sealing groove, and the fifth sealing ring 205 abuts between the groove wall of the fifth sealing groove and the inner wall surface of the filter element mounting seat 10. Therefore, by providing the fifth sealing groove, a layout space can be provided for the fifth sealing ring 205, and the probability of displacement of the fifth sealing ring 205 between the second housing 212 and the filter element mounting seat 10 can be reduced. By providing the fifth sealing ring 205, the sealing between the second housing 212 and the filter element mounting seat 10 can be achieved, thereby ensuring the filtering effect of the filter element 20.

[0138] In one embodiment of the present invention, Figure 8 As shown, a sixth sealing groove is also formed on the outer peripheral wall of the second tube portion 2124, and the sixth sealing groove extends around the second tube portion 2124. A sixth sealing ring 206 is arranged in the sixth sealing groove, and the sixth sealing ring 206 abuts between the groove wall of the sixth sealing groove and the inner wall surface of the filter element mounting seat 10. Therefore, by providing the sixth sealing groove, a layout space can be provided for the sixth sealing ring 206, and the probability of displacement of the sixth sealing ring 206 between the second tube portion 2124 and the filter element mounting seat 10 is reduced. By providing the sixth sealing ring 206, the sealing between the water outlet hole 2123 and the water outlet interface 102 can be achieved, thereby ensuring the filtering effect of the filter element 20.

[0139] In some embodiments of the present invention, Fig.23 As shown, the filter element 20 may include: a filter box 27, the filter box 27 is arranged in the shell 21, the filter box 27 and the shell 21 cooperate to define an inlet channel 207 and a drain channel 208, the inlet channel 207 is connected to the water inlet hole 2122, and the drain channel 208 is connected to the water outlet hole 2123.

[0140] In this embodiment, when the filter element 20 performs filtering operation, the water entering from the water inlet hole 2122 flows along the water inlet channel 207 and enters the filter box 27. After being filtered in the filter box 27, the water flows along the water outlet channel 209 to the water outlet hole 2123 and finally flows into the inner tank 500.

[0141] Therefore, a filter box 27 is set in the filter element 20 and the filter box 27 and the shell 21 are used to cooperate to define the water inlet channel 207 and the drainage channel 208. This can make the overall structure of the filter element 20 simpler and the assembly of the filter element 20 more convenient, which is beneficial to improving the production efficiency of the filter element 20. At the same time, the structure of the filter box 27 is used to store the filter material, so that the assembler can first fill the filter material into the filter box 27 and then assemble the filter box 27 and the filter material in the shell 21, so that the filling operation of the filter material is more convenient and easy, thereby making the assembly of the filter element 20 more convenient and efficient.

[0142] In one embodiment of the present invention, Figure 23-Figure 25 As shown, the filter material box 27 may include: a cover body 271 and a box body 272, wherein a positioning protrusion 2711 is provided on the end face of one end of the cover body 271 facing the water inlet hole 2122, and the other end of the cover body 271 facing away from the water inlet hole 2122 is open; one end of the box body 272 facing the water outlet hole 2123 extends into the cover body 271, wherein one end of the elastic member 23 is limitedly fixed in the space formed by the positioning protrusion 2711, and the other end of the elastic member 23 abuts against the side of the water stop member 22 facing away from the water inlet hole 2122.

[0143] Therefore, a positioning protrusion 2711 is set on the cover body 271 of the filter box 27 to limit and support the elastic member 23. The overall structural strength of the filter box 27 is high and the stability is good, so that the elastic member 23 can be stably and securely supported in the space formed by the positioning protrusion 2711, and then the elastic member 23 can stably abut the water stop member 22 to block the water inlet hole 2122, so that the filter element 20 has a better anti-leakage effect.

[0144] In one embodiment of the present invention, Figure 23-Figure 25As shown, a seventh sealing groove is formed on the outer peripheral wall of the cover body 271, and a seventh sealing ring 274 is arranged in the seventh sealing groove. The seventh sealing groove extends around the cover body 271, and the seventh sealing ring 274 abuts against the groove wall of the seventh sealing groove and the inner wall surface of the second tube portion 2124. In this way, the seventh sealing groove can provide an arrangement space for the seventh sealing ring 274, thereby reducing the probability of the seventh sealing ring 274 being displaced between the inner peripheral wall of the cover body 271 and the second tube portion 2124, thereby realizing the sealing of the cover body 271 and the second tube portion 2124, preventing the incoming water from flowing from the connection between the box body 272 and the second tube portion 2124 to the second tube portion 2124 and then flowing out from the water outlet 2123, so that the filtering effect of the filter element 20 is more stable and reliable.

[0145] In some examples of the present invention, Fig.25 As shown, the outer peripheral wall of the box body 272 may have a limiting rib 2721 extending along the circumference of the cover body 271, and the other end of the cover body 271 is supported on the limiting rib 2721. Therefore, the limiting rib 2721 is provided on the box body 272 to facilitate the matching and positioning of the cover body 271 and the box body 272, and to prevent the cover body 271 from continuing to move in a direction away from the water outlet 2123, so that the filter material box 27 has better stability after assembly.

[0146] In some examples of the present invention, Fig.25 As shown, at least part of the outer peripheral wall of the cover 271 can be formed into a filter screen 273, and the filter screen 273 extends in a ring shape along the circumference of the cover 271. In this way, the water in the water inlet channel 207 can conveniently flow through the filter screen 273 into the filter material box 27, and effectively prevent the filter material from flowing out of the filter material box 27, so that the filter element 20 can maintain a stable state during long-term use. At the same time, the filter screen 273 can filter large particles of impurities and sediment in the water, so that the filter material has a longer service life, which is beneficial to reduce the user's use cost to a certain extent.

[0147] Furthermore, if Figure 23-Figure 25 As shown, an eighth sealing groove is formed on the outer wall of the box body 272, and an eighth sealing ring 275 is arranged in the eighth sealing groove. The eighth sealing groove extends around the box body 272, and the eighth sealing ring 275 abuts between the groove wall of the eighth sealing groove and the inner wall of the filter net 273. In this way, the eighth sealing groove can provide an arrangement space for the eighth sealing ring 275, thereby reducing the probability of the eighth sealing ring 275 being displaced between the box body 272 and the inner wall of the filter net 273. At the same time, it can prevent water from directly flowing into the water outlet 2123 without being filtered by the filter material inside the filter net 273, thereby ensuring a good filtering effect of the filter element 20.

[0148] The following will refer to Figure 1-Figure 32 The water heater 1000 according to three specific embodiments of the present invention is described.

[0149] Embodiment 1,

[0150] like Figure 1-Figure 3 As shown, the water heater 1000 includes a housing 400, an inner tank 500, a water inlet pipe 200, a water outlet pipe 300 and a filter element assembly 100. The inner tank 500 is connected to the water inlet pipe 200 and the water outlet pipe 300, and the filter element assembly 100 is serially connected to the water inlet pipe 200. The filter element assembly 100 can be arranged outside the housing 400, or the filter element assembly 100 can be arranged inside the housing 400.

[0151] When the water heater 1000 is in use, water flows along the water inlet pipe 200 into the filter element assembly 100 for filtration. After filtration, the water continues to flow along the water inlet pipe 200 into the inner tank 500. After being heated in the inner tank 500, the water flows out from the water outlet pipe 300 for use by the user.

[0152] refer to Figure 6-Figure 17 As shown, the filter element assembly 100 includes a filter element mounting seat 10 and a filter element 20, and the filter element 20 is rotatably engaged with the filter element mounting seat 10. The filter element mounting seat 10 has a water inlet interface 101 and a water outlet interface 102, and the filter element mounting seat 10 is provided with a matching cavity 104 with one side open, and a guide surface and a card slot 111 are formed on the peripheral wall of the matching cavity 104, and the guide surface and the card slot 111 are provided with two and one-to-one corresponding, and the guide surface spirally extends toward the bottom wall of the matching cavity 104 and is connected to the card slot 111.

[0153] The filter element 20 includes a housing 21, a one-way valve 28, a water stop 22, an elastic member 23, a positioning member 24, a filter material cover 25 and a central tube 26. The housing 21 includes a first housing 211 and a second housing 212. The first housing 211 is threadedly connected to the second housing 212. The top of the first housing 211 is open, and the bottom of the second housing 212 is open and the cover is on the open side of the first housing 211. Six limiting ribs 2111 are formed on the bottom wall of the first housing 211. The six limiting ribs 2111 are arranged at intervals along the circumference of the central tube 26, and the limiting ribs 2111 extend along the radial direction of the central tube 26. The top of the second housing 212 is formed with a water inlet hole 2122 and a water outlet hole 2123. The water inlet hole 2122 is provided with three and The second shell 212 is arranged at circumferential intervals along the water outlet hole 2123, and a second tube portion 2124 is formed in the second shell 212. The inner side of the second tube portion 2124 is connected to the water outlet hole 2123, and a one-way valve 28 is arranged in the second tube portion 2124; the water stop member 22 is arranged in the second shell 212 and abuts against and blocks the water inlet hole 2122; the elastic member 23 is a spring, one end of the spring abuts against the water stop member 22, and the other end of the elastic member 23 abuts against the positioning member 24, and the positioning member 24 is clamped and fixed in the second shell 400, and the outer diameter of the spring gradually increases in the direction from the water stop member 22 to the positioning member 24.

[0154] The filter cover 25 is arranged in the first shell 211, and the filter cover 25 includes a cover body 251 and a first tube part 252. The first tube part 252 extends along the axis of the second tube part 2124 and is connected to the second tube part 2124. A limiting groove 2511 is formed on the side of the cover body 251 away from the positioning member 24. The cover body 251 has a through hole penetrating the cover body 251, and a filter screen 2512 is arranged in the through hole. The filter screen 2512 extends in a ring shape along the circumference of the first tube part 252; the central tube 26 extends along the axial direction of the second tube part 2124, one end of the central tube 26 is connected to the first tube part 252, and the other end of the central tube 26 abuts against the bottom wall of the first shell 211. Six limiting ribs 2111 abut against the circumference of the center tube 26 to fix the center tube 26. A water hole 262 is provided on the circumferential wall of the center tube 26 close to the bottom wall of the first shell 211. A limiting ring 261 is formed at one end of the center tube 26 connected to the first tube portion 252. The limiting ring 261 is fixedly limited in the limiting groove 2511, wherein the cover body 251 cooperates with the second shell 212 and the center tube 26 to define a filter material cavity, and the filter material is filled in the filter material cavity. The inner side of the center tube 26 defines a water outlet channel 209, and the inner side of the first tube portion 252 defines an intermediate channel 2521. The center tube 26 is coaxially arranged with the first tube portion 252, the second tube portion 2124 and the spring.

[0155] A first sealing groove is formed on the cover body 251, and a first sealing ring 201 is arranged in the first sealing groove to seal the filter cover 25 and the inner peripheral wall of the housing 21; a second sealing groove is formed on the outer peripheral wall of the first tube part 252, and a second sealing ring 202 is arranged in the second sealing groove to seal the first tube part 252 and the second tube part 2124; a third sealing groove is formed on the outer peripheral wall of the one-way valve 28, and a third sealing ring 203 is arranged in the third sealing groove to seal the one-way valve 28 and the inner wall of the second tube part 2124; the first housing 211 A fourth sealing groove is formed on the inner wall surface, and a fourth sealing ring 204 is arranged in the fourth sealing groove to seal the first shell 211 and the second shell 212; a fifth sealing groove is formed on the outer peripheral wall of the second shell 212, and a fifth sealing ring 205 is arranged in the fifth sealing groove to seal the shell 21 and the filter element mounting seat 10; a sixth sealing groove is formed on the outer peripheral wall of the second tube portion 2124, and a sixth sealing ring 206 is arranged in the sixth sealing groove to seal the water outlet hole 2123 of the filter element 20 and the water outlet interface 102 of the filter element mounting seat 10.

[0156] After the filter material assembly is connected in series in the water inlet pipe 200, water flows into the filter element 20 from the water inlet hole 2122 along the water inlet interface 101 of the filter element mounting seat 10, the filter screen 2512 preliminarily filters the incoming water, and the water after preliminarily filtration passes through the filter screen 273 and enters the filter material cavity, the filter material filters the water flowing through, and the filtered water flows from the flow hole to the water outlet channel 209, and then the water flows along the middle channel 2521 to the one-way valve 28, and finally the water flows out of the water outlet hole 2123 from the one-way valve 28 and flows along the water inlet pipe 200 to the inner tank 500, the water heater 1000 heats the water in the inner tank 500, and the heated water flows out from the water outlet pipe 300 for user use. When water flows into the filter element 20 from the water inlet hole 2122 , the water flow exerts pressure on the water stop 22 . When the water pressure reaches a preset value, the water flow can push open the water stop 22 , making the water inlet hole 2122 unobstructed, thereby allowing water to enter the filter element 20 .

[0157] When replacing the filter element 20, the user can first stop the water supply to the pipeline and then replace it. The user unscrews the filter element 20 from the filter element mounting seat 10 and replaces the new filter element 20. When the filter element 20 is separated from the filter element mounting seat 10, the water stop member 22 is restored to the state of abutting and blocking the water inlet hole 2122 under the action of the spring. The pressure of the water in the filter element 20 on the one-way valve 28 does not reach the preset pressure. The one-way valve 28 closes the water outlet hole 2123, and the water in the filter element 20 does not spill out.

[0158] According to the water heater 1000 of the present invention, by serially connecting the filter element assembly 100 to the water inlet pipe 200 of the water heater 1000, it can effectively prevent the user from experiencing discomfort such as skin itching after bathing, and at the same time reduce the probability of scaling of the water heater 1000, and prevent the water in the filter element 20 from spilling when the filter element 20 is replaced, so that the user has better bathing comfort and greatly improves the user experience.

[0159] Embodiment 2:

[0160] like Figure 4 As shown, the structure of this embodiment is roughly the same as that of the first embodiment, except that the water heater 1000 also includes a mixing valve 700 and a connecting pipe 600, the mixing valve 700 is connected in series to the water outlet pipe 300, one end of the connecting pipe 600 is connected to the water inlet pipe 200 and connected between the filter element assembly 100 and the inner tank 500, and the other end of the connecting pipe 600 is connected to the mixing valve 700.

[0161] When the water heater 1000 is in use, water flows along the water inlet pipe 200 into the filter element assembly 100 for filtration. After the water is filtered, part of the water continues to flow along the water inlet pipe 200 into the inner tank 500. After being heated in the inner tank 500, the water flows out from the water outlet pipe 300 and enters the mixing valve 700. Part of the water flows along the connecting pipe 600 into the mixing valve 700. The water from the inner tank 500 and the water from the connecting pipe 600 are mixed in the mixing valve 700 as needed and then flow out from the water outlet pipe 300 for use by the user.

[0162] Embodiment 3,

[0163] like Figure 5 As shown, the structure of this embodiment is substantially the same as that of the second embodiment, except that one end of the connecting pipe 600 connected to the water inlet pipe 200 is connected upstream of the filter element assembly 100 in the direction of water flow.

[0164] When the water heater 1000 is in use, part of the water in the water inlet pipe 200 enters the filter element assembly 100 along the water inlet pipe 200 for filtration. After being filtered, the water continues to flow along the water inlet pipe 200 to the inner tank 500. After being heated in the inner tank 500, the water flows out from the water outlet pipe 300 and enters the mixing valve 700. Part of the water flows along the connecting pipe 600 into the mixing valve 700. The water from the inner tank 500 and the water from the connecting pipe 600 are mixed in the mixing valve 700 as needed and then flow out from the water outlet pipe 300 for use by the user.

[0165] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0166] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0167] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0168] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0169] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water heater, characterized in that: include: An inner tank, wherein the inner tank is connected to a water inlet pipe; A filter element assembly, wherein the filter element assembly is connected in series to the water inlet pipe, the filter element assembly comprises a filter element mounting seat and a filter element detachably connected to the filter element mounting seat, the filter element mounting seat has a water inlet interface, the filter element comprises a shell and a water stop member, the shell comprises a first shell and a second shell, one end of the first shell is open, the second shell is arranged at the open end of the first shell, the end of the second shell facing the first shell is open and is detachably connected to the first shell, the shell has a water inlet hole, the water stop member is arranged in the shell and is located at the water inlet hole position, wherein when the filter element is separated from the filter element mounting seat, the water stop member blocks the water inlet hole, and when the filter element is connected to the filter element mounting seat, the filter element mounting seat pushes the water stop member to open the water inlet hole so that the water inlet hole is connected to the water inlet interface.

2. The water heater according to claim 1, characterized in that: The water heater comprises a shell, the inner tank is arranged in the shell, the filter element assembly is arranged in the shell, or the filter element assembly is arranged outside the shell.

3. The water heater according to claim 1, characterized in that: Also includes: A mixing valve, a connecting pipe and a water outlet pipe, wherein the water outlet pipe is connected to the inner tank, the mixing valve is connected in series to the water outlet pipe, one end of the connecting pipe is connected to the water inlet pipe and the other end is connected to the mixing valve.

4. The water heater according to claim 3, characterized in that: The one end of the connecting tube is connected between the inner tank and the filter element assembly; or, the one end of the connecting tube is connected to the upstream of the filter element assembly in the direction of water flow.

5. The water heater according to claim 1, characterized in that: The filter element comprises filter material, the filter material is arranged in the shell, the filter material is adsorptive filter material, displacement ion filter material or anti-ion agglomeration filter material; and / or the filter material is sheet filter material, granular filter material or cotton filter material.

6. The water heater according to any one of claims 1 to 5, characterized in that: The filter element also includes an elastic member, which is arranged on a side of the water stop member away from the water inlet hole. One end of the elastic member is fixed and the other end abuts against the water stop member to push the water stop member to close the water inlet hole.

7. The water heater according to claim 6, characterized in that: An annular mounting groove is provided on the side of the water stop member facing away from the water inlet hole. The elastic member is a spring. One end of the spring extends into the mounting groove and is fixedly connected to the water stop member.

8. The water heater according to claim 6, characterized in that: The filter element further includes: a positioning member, which is arranged in the housing and located on a side of the elastic member away from the water stop member, the positioning member is fixed to the housing, and the elastic member is connected between the positioning member and the water stop member.

9. The water heater according to claim 8, characterized in that: A supporting rib is formed on the inner wall surface of the shell, and the supporting rib extends in a ring shape along the circumference of the shell. The positioning member is arranged on the side of the supporting rib facing the water stop member, and the outer peripheral edge of the positioning member is supported on the supporting rib.

10. The water heater according to any one of claims 1 to 5, characterized in that: The filter element comprises: A central tube, the central tube being disposed in the shell, and having a water hole formed thereon and penetrating the central tube in a radial direction; A filter material cover, the filter material cover is arranged in the housing and connected to the central tube, the filter material cover is located on a side of the central tube facing the water inlet hole, Among them, the filter material cover, the outer wall surface of the central tube and the inner wall surface of the shell cooperate to define a filter material cavity for filling filter material, the inner side of the central tube defines a water outlet channel, the filter material cavity is connected with the water inlet hole, the water outlet channel is connected with the water outlet hole of the shell, and the water outlet channel and the filter material cavity are connected through the water hole.

11. The water heater according to claim 10, characterized in that A plurality of limiting ribs are arranged on the bottom wall of the shell, and the plurality of limiting ribs are arranged at intervals around the central tube. The filter cover has a limiting portion, one end of the central tube is limitedly matched with the limiting portion, and the other end of the central tube is limitedly matched with the inner side of the plurality of limiting ribs.

12. The water heater according to claim 11, characterized in that The limiting portion is formed as a limiting groove, and the one end of the central tube is provided with a limiting ring protruding outwardly along the radial direction of the central tube. The limiting ring extends along the circumference of the central tube, and the limiting ring is limitedly fitted in the limiting groove.

13. The water heater according to claim 10, characterized in that The filter cover comprises a cover body and a first tube portion, wherein the cover body is a plate body arranged perpendicular to the axis of the central tube, the first tube portion is connected to the cover body and extends along the axial direction of the central tube, and an intermediate channel is defined inside the first tube portion. The shell has a second tube portion, which extends along the axial direction of the central tube and defines the water outlet hole on the inner side. The first tube portion and the second tube portion are sealed and sleeved, and the water outlet hole is connected with the water outlet channel through the middle channel.

14. The water heater according to any one of claims 1 to 5, characterized in that: The filter element mounting seat includes a mounting seat body and a push rod, the mounting seat body is formed with the water inlet interface, the mounting seat body is detachably connected to the filter element, one end of the push rod is connected to the mounting seat body, and the other end of the push rod passes through the water inlet hole and extends into the shell to push the water stop member to open the water inlet hole.

15. The water heater according to claim 1, characterized in that A valve assembly is provided in the filter element mounting seat, and the valve assembly has an on state and a off state; Wherein, after the filter element is assembled with the filter element mounting seat, the valve assembly is in the conducting state, the water inlet hole is communicated with the water inlet interface, and the water outlet hole of the filter element is communicated with the water outlet interface of the filter element mounting seat; After the filter element is separated from the filter element mounting seat, the valve assembly is in the cut-off state, the water inlet hole is separated from the water inlet interface, and the water outlet hole is separated from the water outlet interface.

16. The water heater according to claim 15, characterized in that When the filter element is assembled with the filter element mounting seat, the filter element is in contact with and cooperates with the valve assembly, so that the valve assembly switches from the cut-off state to the conduction state.

17. The water heater according to claim 15, characterized in that In the on state, the water inlet interface is isolated from the water outlet interface; in the off state, the water inlet interface is connected to the water outlet interface.

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