Water heater

Abstract

According to the water heater, an inner container is connected with a water inlet pipe and a water outlet pipe, a first filter element assembly is connected to the water inlet pipe in series, a second filter element assembly is connected to the water outlet pipe in series, and each of the first filter element assembly and the second filter element assembly comprises a filter element mounting base and a filter element detachably connected with the filter element mounting base; the filter element mounting seat is provided with a water inlet interface and a water outlet interface, when the filter element is separated from the filter element mounting seat, the water stop piece blocks the water inlet hole, and when the filter element is connected with the filter element mounting seat, the filter element mounting seat pushes the water stop piece to open the water inlet hole, so that the water inlet hole is communicated with the water inlet interface. According to the water heater, water flowing out of the water heater is filtered twice through the first filter element assembly and the second filter element assembly, so that the situation that a user feels uncomfortable after bathing is reduced as much as possible, the use feeling of the user is improved, and when the filter element is replaced, the situation that water stored in the filter element spills out of the water inlet hole is effectively avoided.

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 increased significantly. In the related technology, the water discharged from the water heater 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 provides a water heater, which can well improve the bathing comfort of users and provide users with a better use experience.

[0004] According to an embodiment of the present invention, the water heater comprises: an outer shell; an inner shell, the inner shell is arranged in the outer shell, and the inner shell is connected to a water inlet pipe and a water outlet pipe; a first filter element assembly, the first filter element assembly is connected in series to the water inlet pipe; a second filter element assembly, the second filter element assembly is connected in series to the water outlet pipe; at least one of the first filter element assembly and the second filter element assembly is arranged in the outer shell, or the first filter element assembly and the second filter element assembly are both arranged outside the outer shell, and the first filter element assembly and the second filter element assembly each include 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 and a water outlet interface, the filter element includes a shell, the shell has a water inlet hole and a water outlet hole, at least one of the first filter element assembly and the second filter element assembly includes a water stop member, the water outlet hole and the water outlet interface are connected, 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 embodiment of the present invention, the inner tank is connected with a water inlet pipe and a water outlet pipe, and the first filter element assembly is connected in series to the water inlet pipe, and the second filter element assembly is connected in series to the water outlet pipe, so that the water flowing out of the water heater is filtered twice by the first filter element assembly and the second filter element assembly, thereby minimizing the discomfort of the user's skin itching after bathing, and reducing the probability of scaling of the water heater, thereby improving the user's experience. At the same time, at least one of the first filter element assembly and the second filter element assembly includes a water stopper, and the water outlet hole and the water outlet interface are connected. The water stopper is arranged in the shell and is located at the water inlet hole. When the filter element is separated from the filter element mounting seat, the water stopper blocks the water inlet hole. When the filter element is connected to the filter element mounting seat, the filter element mounting seat pushes the water stopper to open the water inlet hole, so that the water inlet hole is connected to the water inlet interface, thereby realizing the filtration of the filter element to the incoming water when the filter element is connected to the filter element mounting seat, and when the filter element is replaced, it is effectively avoided that the water in the filter element is spilled from the water inlet hole.

[0006] In addition, by providing an outer shell on the water heater, the inner tank is provided in the outer shell, at least one of the first filter element assembly and the second filter element assembly is provided in the outer shell, or the first filter element assembly and the second filter element assembly are both provided outside the outer shell, so that the actual arrangement of the first filter element assembly or the second filter element assembly in the water heater can be personalized according to the user's personal needs, and the reliability of the water heater is improved by the provision of the outer shell.

[0007] In some embodiments of the invention, it further comprises: a water mixing valve and a connecting pipe, wherein the water 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 water mixing valve.

[0008] In some embodiments of the invention, the one end of the connecting tube is connected between the inner tank and the first filter element assembly, or the one end of the connecting tube is connected upstream of the first filter element assembly in the direction of water flow.

[0009] In some embodiments of the invention, the water mixing valve is located upstream of the second filter element assembly in the direction of water flow, or the water mixing valve is located downstream of the second filter element assembly in the direction of water flow.

[0010] In some embodiments of the invention, the filter element of the first filter element assembly is a first filter element, the first filter element includes a first filter material, the first filter material is arranged in the shell, and the first filter material is an adsorptive filter material, a replacement ion filter material or an anti-ion clumping filter material.

[0011] In some embodiments of the invention, the first filter material is a sheet-like filter material, a granular filter material or a cotton-like filter material.

[0012] In some embodiments of the invention, the filter element of the second filter element assembly is a second filter element, the second filter element includes a second filter material, the second filter material is disposed in the housing, and the second filter material is a slow-release filter material.

[0013] In some embodiments of the 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.

[0014] In some embodiments of the invention, an annular mounting groove is provided on the side of the water stop member facing away from the water inlet hole, and 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.

[0015] In some embodiments of the invention, the filter element further includes: a positioning member, which is disposed 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.

[0016] In some embodiments of the invention, a first supporting rib is formed on the inner wall surface of the shell, and the first supporting rib extends in a ring shape along the circumference of the shell. The positioning member is arranged on the side of the first supporting rib facing the water stop member, and the outer peripheral edge of the positioning member is supported on the first supporting rib.

[0017] In some embodiments of the 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 and the water outlet 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.

[0018] In some embodiments of the invention, the mounting seat body and the push rod are integrally formed.

[0019] In some embodiments of the invention, the filter element is rotatably engaged with the filter element mounting seat, and the water inlet hole is an arc-shaped hole extending along the circumference of the shell.

[0020] In some embodiments of the invention, the filter element further includes: a push rod, which is inserted into the water inlet hole and cooperates with the clearance of the peripheral wall of the water inlet hole, one end of the push rod is fixed to the water stop member and the other end extends out of the shell, and when the filter element is connected to the filter element mounting seat, the filter element mounting seat abuts against the push rod and pushes the water stop member through the push rod to open the water inlet hole.

[0021] In some embodiments of the invention, the water inlet hole includes a first hole segment and a second hole segment, the first hole segment is located on the side of the second hole segment facing the water inlet interface, the aperture of the first hole segment is smaller than the aperture of the second hole segment, and a limiting boss is provided at one end of the push rod connected to the water stop member, the cross-sectional size of the limiting boss is larger than the cross-sectional size of the first hole segment, and when the water stop member blocks the water inlet hole, the limiting boss fits in the second hole segment.

[0022] In some embodiments of the 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.

[0023] In some embodiments of the 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.

[0024] In some embodiments of the 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.

[0025] In some embodiments of the invention, the filter element of the first filter element assembly is a first filter element, and the first filter element further includes: a center tube, the center tube is arranged in the shell, and a first water hole is formed on the center tube and radially passes through the center tube; a filter material cover, the filter material cover is arranged in the shell and connected to the center tube, 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, the inner side of the center tube defines a first water outlet channel, the filter material cavity is connected to the water inlet hole, the first water outlet channel is connected to the water outlet hole of the shell, and the first water outlet channel and the filter material cavity are connected through the first water hole.

[0026] In some embodiments of the invention, a plurality of first limiting ribs are provided on the bottom wall inside the shell, and the plurality of first 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 first limiting ribs.

[0027] In some embodiments of the 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, and the limiting ring extends along the circumference of the center tube, and the limiting ring is limitedly fitted in the limiting groove.

[0028] In some embodiments of the 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 on the inner side, the first tube portion and the second tube portion are sealingly sleeved, and the water outlet is connected to the first water outlet channel through the intermediate channel.

[0029] In some embodiments of the invention, the filter element of the first filter element assembly is a first filter element, and the first filter element also includes: a first filter material box, the first filter material box is arranged in the shell, the first filter material box includes a filter material box upper cover and a filter material box lower shell, the side of the filter material box upper cover facing away from the water inlet hole has an annular filter screen extending along the circumferential direction of the filter material box upper cover, one end of the filter material box lower shell close to the water inlet hole extends into the filter material box upper cover, the filter material box lower shell is used to accommodate second filter material, the outer peripheral wall of the filter material box upper cover and the shell together define a first water inlet channel, the second water outlet channel is defined in the filter material box lower shell, the peripheral wall of the filter material box lower shell has a water opening for connecting the first water inlet channel and the second water outlet channel, and the filter material box upper cover has a connecting port for connecting the second water outlet channel and the water outlet hole.

[0030] In some embodiments of the invention, one end of the shell provided with the water outlet has an inwardly extending extension piece, the extension piece has a connecting channel therein, and the connecting channel is connected with the communicating port and the water outlet.

[0031] In some embodiments of the invention, the filter box upper cover has a protrusion at one end facing the water inlet hole, the communication port passes through the protrusion, and one end of the extension piece is sleeved outside the protrusion.

[0032] In some embodiments of the invention, the outer peripheral wall of the filter box lower shell has limiting ribs extending along the circumferential direction of the filter box lower shell, and the end of the filter box upper cover facing away from the water inlet hole is supported on the limiting ribs.

[0033] In some embodiments of the invention, the inner circumferential wall of the shell at one end away from the water inlet hole has fixing ribs, and the fixing ribs are multiple and spaced apart along the circumferential direction of the shell, and the first filter material box is located in the space defined by the multiple fixing ribs.

[0034] In some embodiments of the invention, the filter element of the second filter element assembly is a second filter element, and the second filter element further includes: a filter element cover, which is arranged at the open end of the shell and is formed with the water inlet hole and the water outlet hole; a second filter material box, which is arranged in the shell, and the second filter material box has a accommodating cavity for accommodating the second filter material, and the accommodating cavity is suitable for communicating with the water inlet hole and the water outlet hole, and a slow release hole is formed on the second filter material box, and water is suitable for flowing into or out of the accommodating cavity through the slow release hole.

[0035] In some embodiments of the invention, the second filter material box includes a box body and a box cover, the box body is open on one side facing the filter element cover, the box cover is arranged at the open end of the box body, and the slow-release hole is formed on the box cover.

[0036] In some embodiments of the invention, the box cover includes a cover body and a matching portion, wherein the matching portion is arranged on one side of the cover body in the thickness direction, the matching portion is accommodated in the box body and abuts against the inner circumferential wall of the box body, the cover body covers the open end of the box body, and the slow-release hole is formed on the cover body.

[0037] In some embodiments of the invention, a limiting structure is provided in the shell, and the limiting structure is used to limit the second filter box.

[0038] In some embodiments of the invention, the inner wall of the shell opposite to the open end of the shell is the shell bottom wall, the limiting structure is arranged on the shell bottom wall, the limiting structure is located on the outer peripheral side of the second filter box and is suitable for abutting against the outer peripheral wall of the second filter box.

[0039] In some embodiments of the invention, the limiting structure includes a plurality of second limiting ribs, and the plurality of second limiting ribs are arranged at intervals along the circumference of the second filter box, and the second limiting ribs have a guide surface and a limiting surface, and the guide surface is connected to the side of the limiting surface adjacent to the filter element cover, and the guide surface extends obliquely in the direction from the open end of the shell to the bottom wall of the shell toward the direction adjacent to the central axis of the shell, and there is an angle between the limiting surface and the guide surface, and the limiting surface is suitable for abutting against the outer peripheral wall of the second filter box.

[0040] In some embodiments of the invention, the outer peripheral wall of the second filter box includes a guide wall, which is located at the lower part of the second filter box and connected to the bottom wall of the second filter box, and the guide wall extends obliquely in the direction from the open end of the shell to the bottom wall of the shell toward the direction adjacent to the central axis of the second filter box.

[0041] 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

[0042] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0043] Figure 1 is a schematic diagram of a pipeline of a water heater when a first filter element assembly and a second filter element assembly are both arranged in a water heater housing according to an embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of a pipeline of a water heater when the first filter element assembly and the second filter element assembly are both arranged outside the water heater housing according to an embodiment of the present invention;

[0045] Figure 3 is a schematic diagram of a pipeline of a water heater according to an embodiment of the present invention;

[0046] Figure 4 is a schematic diagram of a pipeline of a water heater with a mixing valve according to an embodiment of the present invention;

[0047] Figure 5 is a schematic diagram of a pipeline of a water heater with a mixing valve according to yet another embodiment of the present invention;

[0048] Figure 6 is a schematic diagram of a pipeline of a water heater with a mixing valve according to another embodiment of the present invention;

[0049] Figure 7 is a schematic diagram of a pipeline of a water heater with a mixing valve according to another embodiment of the present invention;

[0050] Figure 8 is a partial exploded view of a first filter element assembly according to a first embodiment of the present invention, wherein a push rod is disposed on a filter element mounting seat;

[0051] Fig. 9 yes Figure 8 A cross-sectional view of a first filter element assembly shown in ;

[0052] Fig.10 yes Fig. 9 An exploded view of the first filter element assembly shown in ;

[0053] Fig.11 yes Fig. 9 Another exploded view of the first filter element assembly shown in ;

[0054] Fig.12 yes Figure 8 A top view of the first filter element shown in ;

[0055] Fig.13 yes Figure 8 A bottom view of the filter element mounting seat shown in ;

[0056] Fig.14 yes Fig.11 A top view of the filter cover shown in ;

[0057] Fig.15 yes Fig.14 A cross-sectional view of the filter cover shown in ;

[0058] Fig.16 is a partial exploded view of a first filter element assembly according to a second embodiment of the present invention, wherein a push rod is disposed on a water stop;

[0059] Fig.17 yes Fig.16 A cross-sectional view of a first filter element assembly shown in ;

[0060] Fig.18 yes Fig.17 An exploded view of the first filter element assembly shown in ;

[0061] Fig.19 yes Fig.17 Another exploded view of the first filter element assembly shown in ;

[0062] Fig. 20 yes Fig.16 A top view of the first filter element shown in ;

[0063] Fig.21 yes Fig.16 A bottom view of the filter element mounting seat shown in ;

[0064] Fig. 22 is an exploded view of a first filter element of a first filter element assembly according to a fourth embodiment of the present invention, wherein a push rod is disposed on a filter element mounting seat;

[0065] Fig.23 is an exploded view of a first filter element of a first filter element assembly according to a fifth embodiment of the present invention, wherein a push rod is disposed on a water stop;

[0066] Fig.24 yes Fig. 22 A partial exploded view of a first filter element assembly;

[0067] Fig.25 yes Fig.24 a cross-sectional view of a first filter element assembly;

[0068] Fig.26 yes Fig.24 An assembly drawing of a first filter element assembly;

[0069] Fig. 27 yes Fig. 22 Schematic diagram of the filter box cover;

[0070] Fig.28 yes Fig. 22 Schematic diagram of the lower shell of the filter box;

[0071] Fig.29 is a cross-sectional view of a second filter element of a second filter element assembly according to a first embodiment of the present invention;

[0072] Fig.30 yes Fig.29 An assembly cross-sectional view of the second filter element and the filter element mounting seat, wherein the ejector rod is arranged on the filter element mounting seat;

[0073] Fig.31 is a cross-sectional view of a second filter element of a second filter element assembly according to a second embodiment of the present invention, wherein a push rod is disposed on a water stop;

[0074] Fig.32 yes Fig.31 An assembly cross-sectional view of the second filter element and the filter element mounting seat;

[0075] Fig.33 yes Fig.29 A schematic diagram of a shell in FIG.

[0076] Fig.34 yes Fig.33 A schematic diagram of another perspective of the shell in FIG.

[0077] Fig.35 yes Fig.33 A cross-sectional view of a shell in FIG.

[0078] Fig.36 yes Fig.29 Schematic diagram of the box in FIG.

[0079] Fig.37 yes Fig.29 Schematic diagram of the box cover in;

[0080] Fig.38 yes Fig.37 A schematic diagram of another perspective of the box cover;

[0081] Fig.39 yes Fig.37 A cross-sectional view of the box cover in FIG.

[0082] Fig.40 yes Fig.29 Schematic diagram of the filter cover in FIG.

[0083] Fig.41 yes Fig.40 A schematic diagram of another perspective of the filter cover in FIG.

[0084] Fig.42 yes Fig.29 A schematic diagram of the elastic member gland in FIG.

[0085] Fig.43 yes Fig.29 A cross-sectional view of a water stop in FIG.

[0086] Fig.44 is a partial cross-sectional view of the assembly of the second filter element of the second filter element assembly of the third embodiment with the filter element mounting seat, wherein the second filter element assembly has no ejector pin;

[0087] Fig.45 yes Fig.44 A cross-sectional view of a filter element mounting seat in FIG.

[0088] Fig.46 yes Fig.44 An exploded schematic diagram of the second filter element assembly in FIG.

[0089] Fig.47 yes Fig.29 A partial cross-sectional view of the assembly of the second filter element of the second filter element assembly of the first embodiment with the filter element mounting seat, wherein the ejector rod is disposed on the filter element mounting seat;

[0090] Fig.48 yes Fig.47 A cross-sectional view of a filter element mounting seat in FIG.

[0091] Fig.49 yes Fig.47 An exploded schematic diagram of the second filter element assembly in FIG.

[0092] Fig.50 yes Fig.31 A partial cross-sectional view of the assembly of the second filter element of the second filter element assembly and the filter element mounting seat of the second embodiment, wherein the push rod is arranged on the water stop;

[0093] Fig.51 yes Fig.50 A cross-sectional view of a filter element mounting seat in FIG.

[0094] Fig.52 yes Fig.50 An exploded schematic diagram of the second filter element assembly in FIG.

[0095] Fig.53 yes Fig.45 A schematic diagram of a first stop valve in, wherein the first stop valve is in a second position;

[0096] Fig.54 yes Fig.53 A schematic diagram of a first stop valve in , wherein the first stop valve is in a first position;

[0097] Fig.55 yes Fig.45 A cross-sectional view of the filter element mounting seat from another perspective.

[0098] Reference numerals:

[0099] 1000. Water heater;

[0100] 10. Filter element mounting seat; 101. Mounting seat body; 1011. Water inlet interface; 1012. Water outlet interface; 1013. Slide rail; 102. Push rod; 103. Valve assembly; 1031. First stop valve; 10131. First valve seat; 10132. First valve core; 10133. First spring; 10134. Eleventh sealing ring; 1032. Second stop valve; 10321. Second valve seat; 10322. Second valve core; 10323. Second spring; 10324. Thirteenth sealing ring; 1033. First communicating channel; 1034. Second communicating channel; 1035. Tenth sealing ring; 1036. Twelfth sealing ring; 104. First mounting cavity; 105. Second mounting cavity; 106. Connecting cavity;

[0101] 11. filter element; 111. housing; 1111. water inlet; 1111a. first hole section; 1111b. second hole section; 1112. water outlet; 1113. first supporting rib; 1114. second pipe section; 11141. fourth sealing groove; 11142. fourth sealing ring; 1115. first limiting rib; 1116. first housing; 11161. third sealing groove; 11162. third sealing ring; 1117. second housing; 11171. fifth Sealing groove; 11172, fifth sealing ring; 1118, fixing rib; 1119, extension piece; 11191, connecting channel; 11192, seventh sealing ring; 11193, one-way valve; 11194, eighth sealing ring; 12, water stop; 121, mounting groove; 13, elastic member; 14, positioning member; 15, sliding rib; 16, push rod; 161, limiting boss; 23, limiting structure; 231, second limiting rib; 232, guide surface; 233, limiting surface;

[0102] 100, first filter element assembly; 17, first filter element; 171, central tube; 1711, first water hole; 1712, central channel; 172, filter material cover; 1721, limiter; 1722, cover body; 17221, first sealing groove; 17222, ninth sealing ring; 1723, first tube; 17231, second sealing groove; 17232, second sealing ring; 1724, through hole; 173, filter material cavity; 175, filter net; 18, first filter material box; 181, filter material box upper cover; 1811, annular filter net; 1812, first water inlet channel; 1813, connecting port; 18131, stopper; 18132, annular portion; 18133, connecting portion; 1814, sixth sealing ring; 1815, protrusion; 1816, first positioning structure; 182, filter material box lower shell; 1821, second water outlet channel; 1822, water outlet; 1823, limiting rib;

[0103] 200, second filter element assembly; 19, filter element cover; 191, cover body; 1911, first positioning groove; 192, water outlet column; 193, second water inlet channel; 194, third water outlet channel; 195, fourteenth sealing ring; 20, second filter material box; 201, box cover; 2011, cover body; 2012, matching part; 202, box body; 2021, guide wall; 2022, second supporting convex rib; 203, accommodating cavity; 204, slow-release hole; 205, supporting structure; 2051, supporting rib plate; 21, elastic member pressure cover; 211, elastic member baffle; 212, second water hole; 22, second filter element;

[0104] 300, housing;

[0105] 400, inner tank; 401, water inlet pipe; 402, water outlet pipe;

[0106] 500, mixing valve;

[0107] 600. Connecting pipe. DETAILED DESCRIPTION

[0108] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0109] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0110] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0111] The water heater 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0112] like Figure 1-Figure 3 , Fig. 9 As shown in the following figure, a water heater 1000 according to an embodiment of the present invention includes a housing 300 , an inner tank 400 , a first filter element assembly 100 and a second filter element assembly 200 .

[0113] The inner tank 400 is connected to a water inlet pipe 401 and a water outlet pipe 402, a first filter element assembly 100, the first filter element assembly 100 is connected in series to the water inlet pipe 401, and the second filter element assembly 200 is connected in series to the water outlet pipe 402. The first filter element assembly 100 and the second filter element assembly 200 both include a filter element mounting seat 10 and a filter element 11 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the filter element 11 includes a housing 111, and the housing 111 has a water inlet hole 1111 and a water outlet hole 1112. Hole 1112, at least one of the first filter element assembly 100 and the second filter element assembly 200 includes a water stop member 12, the water outlet hole 1112 is connected to the water outlet interface 1012, the water stop member 12 is arranged in the shell 111 and is located at the water inlet hole 1111, wherein, when the filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011.

[0114] It is understandable that when a user uses the water heater 1000 for bathing, water flows from the water inlet pipe 401 to the first filter element assembly 100, the water filtered by the first filter element assembly 100 enters the inner tank 400 of the water heater 1000 for heating, and the heated water flows from the water outlet pipe 402 to the second filter element assembly 200, and after being filtered by the second filter element assembly 200, flows out from the water outlet pipe 402 for user use.

[0115] Specifically, water enters the water inlet interface 1011 of the filter element mounting seat 10 of the first filter element assembly 100 from the water inlet pipe 401, and the water in the water inlet interface 1011 enters the filter element 11 of the first filter element assembly 100 from the water inlet hole 1111 of the first filter element assembly 100. The water after the first filtration flows into the water outlet interface 1012 of the filter element mounting seat 10 of the first filter element assembly 100 from the water outlet hole 1112 of the first filter element assembly 100, and then flows to the inner tank 400 of the water heater 1000, is heated, and then flows to the outlet. Water pipe 402, the heated water enters the water inlet interface 1011 of the filter element mounting seat 10 of the second filter element assembly 200 from the water outlet pipe 402, the water in the water inlet interface 1011 enters the filter element 11 of the second filter element assembly 200 from the water inlet hole 1111 of the second filter element assembly 200, the water after the second filtration flows into the water outlet interface 1012 of the filter element mounting seat 10 of the second filter element assembly 200 from the water outlet hole 1112 of the second filter element assembly 200, and then flows out from the water outlet pipe 402 for user use.

[0116] Thus, the filter element 11 of the first filter element assembly 100 and the filter element 11 of the second filter element assembly 200 perform a double filtering action on the incoming water, thereby filtering out substances in the water such as chloride ions that irritate human skin, and finally the filtered water flows out from the outlet pipe 402 for the user to use, 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 discomfort such as skin itching after bathing, allowing the user to have better bathing comfort and greatly improving the user experience. At the same time, since there are usually more calcium and magnesium ions dissolved in water, these substances dissolved in the water will form calcium and magnesium compounds such as calcium carbonate and magnesium carbonate after heating, which will precipitate from the water to form scale. The thermal conductivity of scale is very poor. When the scale adheres to the heating device in the inner tank 400, the heating efficiency of the heating device will decrease, thereby reducing the use effect of the water heater 1000. Therefore, the filter element 11 of the first filter element assembly 100 first filters the incoming water flowing into the inner tank 400, thereby filtering the calcium and magnesium ions in the water from 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.

[0117] At the same time, at least one of the first filter element assembly 100 and the second filter element assembly 200 includes a water stop member 12, and the water stop member 12 is arranged in the shell 111 and located at the water inlet hole 1111, wherein when the filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011. It is understandable that the filter element 11 needs to be replaced after being used for a period of time to ensure a good filtering effect. Therefore, through such a setting, when replacing the filter element 11, the filter element 11 is removed from the filter element mounting seat 10, and the water stop member 12 can block the water inlet hole 1111, thereby effectively preventing the water stored in the filter element 11 from spilling out from the water inlet hole 1111 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, and when the filter element 11 is connected to the filter element mounting seat 10, the water inlet hole 1111 of the water stop member 12 is connected with the water inlet interface 1011 to realize the filtering of the incoming water by the filter element 11, thereby improving the reliability of the water heater 1000.

[0118] Therefore, when the user is preparing to replace or repair the filter element 11, the water inlet hole 1111 and the water outlet hole 1112 can be closed to prevent the residual water in the filter element 11 from splashing onto the ground or the user through the water inlet hole 1111 and the water outlet hole 1112. When the user is preparing to place the removed filter element 11 for a long time, the water inlet hole 1111 and the water outlet hole 1112 can be closed to prevent impurities in the external environment from entering the filter element 11 through the water inlet hole 1111 and the water outlet hole 1112 to contaminate the filter element 11.

[0119] Specifically, when the first filter element assembly 100 includes a water stop 12, when the filter element 11 of the first filter element assembly 100 is connected in series to the water inlet pipe 401 through the filter element mounting seat 10, the water inlet hole 1111 in the filter element 11 of the first filter element assembly 100 and the water inlet interface 1011 are in a state of unblocked. When the filter element 11 of the first filter element assembly 100 and the filter element mounting seat 10 are not assembled, the water stop 12 blocks the water inlet hole 1111 on the filter element 11 of the first filter element assembly 100. 1 is blocked; when the second filter element assembly 200 includes a water stopper 12, when the filter element 11 of the second filter element assembly 200 is connected in series to the water outlet pipe 402 through the filter element mounting seat 10, the water inlet hole 1111 in the filter element 11 of the second filter element assembly 200 and the water inlet interface 1011 are in a state of unblocked, and when the filter element 11 of the second filter element assembly 200 and the filter element mounting seat 10 are not assembled, the water stopper 12 blocks the water inlet hole 1111 on the filter element 11 of the second filter element assembly 200. 11 is blocked; when both the first filter element assembly 100 and the second filter element assembly 200 include a water stop 12, when the filter element 11 of the first filter element assembly 100 is connected in series to the water inlet pipe 401 through the filter element mounting seat 10, the water inlet hole 1111 in the filter element 11 of the first filter element assembly 100 and the water inlet interface 1011 are in a state of unblocked, and when the filter element 11 of the first filter element assembly 100 and the filter element mounting seat 10 are not assembled, the water stop 12 blocks the first filter element assembly 100. The water inlet hole 1111 on the filter element 11 is blocked. When the filter element 11 of the second filter element assembly 200 is connected in series to the water outlet pipe 402 through the filter element mounting seat 10, the water inlet hole 1111 in the filter element 11 of the second filter element assembly 200 and the water inlet interface 1011 are in a smooth state. When the filter element 11 of the second filter element assembly 200 and the filter element mounting seat 10 are not assembled, the water stop member 12 blocks the water inlet hole 1111 on the filter element 11 of the second filter element assembly 200.

[0120] In addition, by setting the shell 300 on the water heater 1000 and the inner tank 400 in the shell 300, the assembly and arrangement of the various components in the water heater 1000 can be facilitated, and the inner tank 400 and the various components can be well protected, so that the inner tank 400 and the various components can be in a relatively closed environment, and maintain a good use state and service life. And by the first filter element assembly 100 and the second filter element assembly 200 are both arranged in the shell 300, the shell 300 can protect and waterproof the first filter element assembly 100 and the second filter element assembly 200, so that the first filter element assembly 100 and the second filter element assembly 200 can be used more stably for a long time, reduce the probability of failure, and at the same time, reduce the number of parts leaking from the water heater 1000, so that the water heater 1000 has better integrity, is easy to install and transport, and reduces the extra space occupied by the first filter element assembly 100 and the second filter element assembly 200 when assembled externally, so that the user experience is better.

[0121] It is understandable that when the water heater 1000 is installed, the housing 300 is generally fixed to the wall by fasteners. Since the water heater 1000 is relatively large, the water heater 1000 is generally not easily removed after installation. Since the first filter element assembly 100 and the second filter element assembly 200 are both arranged outside the housing 300, when the user replaces the filter element 11 through the first filter element assembly 100 or the second filter element assembly 200, the user only needs to remove the filter element 11 from the filter element mounting seat 10 and replace it. The user can complete the operation of replacing the filter element 11 by himself with less physical effort, so that the user can get a good experience when replacing and maintaining the water heater 1000.

[0122] Of course, the actual arrangement of the first filter element assembly 100 or the second filter element assembly 200 in the water heater 1000 can be personalized according to the personal needs of the user, and no specific restrictions are made on the arrangement of the first filter element assembly 100 or the second filter element assembly 200. For example, the first filter element assembly 100 is inside the housing 300 and the second filter element assembly 200 is outside the housing 300, or the second filter element assembly 200 is inside the housing 300 and the first filter element assembly 100 is outside the housing 300.

[0123] According to the water heater 1000 of the embodiment of the present invention, the inner tank 400 is connected to the water inlet pipe 401 and the water outlet pipe 402, and the first filter element assembly 100 is serially connected to the water inlet pipe 401, and the second filter element assembly 200 is serially connected to the water outlet pipe 402, so that the water flowing out of the water heater 1000 is filtered twice by the first filter element assembly 100 and the second filter element assembly 200, thereby minimizing the discomfort such as skin itching that the user experiences after bathing, and reducing the probability of scaling of the water heater 1000. At the same time, at least one of the first filter element assembly 100 and the second filter element assembly 200 includes a water stop member 12, the water outlet hole 1112 and the water outlet interface 1012 are connected, the water stop member 12 is arranged in the shell body 111 and is located at the water inlet hole 1111, wherein, when the filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected with the water inlet interface 1011, thereby realizing that the filter element 11 filters the incoming water when the filter element 11 is connected to the filter element mounting seat 10, and when the filter element 11 is replaced, it is effectively prevented that the water in the filter element 11 is spilled from the water inlet hole 1111.

[0124] In addition, by providing a shell 300 on the water heater 1000, the inner tank 400 is provided in the shell 300, at least one of the first filter element assembly 100 and the second filter element assembly 200 is provided in the shell 300, or the first filter element assembly 100 and the second filter element 11 group are both provided outside the shell 300, so that the actual arrangement of the first filter element assembly 100 or the second filter element assembly 200 in the water heater 1000 can be personalized according to the user's personal needs, and the reliability of the water heater 1000 is improved by the provision of the shell 300.

[0125] In some embodiments of the present invention, Figure 4-Figure 7 As shown, the water heater 1000 further includes a mixing valve 500 and a connecting pipe 600. The mixing valve 500 is connected in series to the water outlet pipe 402, one end of the connecting pipe 600 is connected to the water inlet pipe 401 and the other end is connected to the mixing valve 500. It is understandable that when using the water heater 1000, the user needs water outlets of different temperatures. Therefore, by connecting the mixing valve 500 in series to the water outlet pipe 402 and using the connecting pipe 600 to divert the cold water in the water inlet pipe 401 to the mixing valve 500, the cold water and the hot water in the water outlet pipe 402 can be mixed, so that the water flowing out of the water outlet pipe 402 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 mixing valve 500 and the connecting pipe 600 are simple in structure and have good use effects. Optionally, the mixing valve 500 may not be provided in the water heater 1000.

[0126] In some embodiments of the present invention, Figure 4-Figure 7As shown, one end of the connecting pipe 600 is connected between the inner tank 400 and the first filter core assembly 100, or one end of the connecting pipe 600 is connected to the upstream of the first filter core assembly 100 in the direction of water flow. Thus, when one end of the connecting pipe 600 is connected between the inner tank 400 and the first filter core assembly 100, after the water in the water inlet pipe 401 is filtered by the first filter core assembly 100, part of the water flows into the inner tank 400 and flows from the inner tank 400 to the water outlet pipe 402, and the remaining part of the water flows from the connecting pipe 600 to the mixing valve 500; when one end of the connecting pipe 600 is connected to the upstream of the first filter core assembly 100 in the direction of water flow, part of the water in the water inlet pipe 401 flows into the inner tank 400 through the first filter core assembly 100 and flows from the inner tank 400 to the water outlet pipe 402, and the remaining part of the water flows from the connecting pipe 600 to the mixing valve 500. Therefore, different requirements of the water heater 1000 can be met by different connection positions of the connecting pipe 600 .

[0127] In some embodiments of the present invention, Figure 4-Figure 7 As shown, the mixing valve 500 is upstream of the second filter element assembly 200 in the direction of water flow, or the mixing valve 500 is downstream of the second filter element assembly 200 in the direction of water flow. It can be understood that after the hot water flowing out of the water heater 1000 and the cold water flowing out of the connecting pipe 600 enter the mixing valve 500, when the mixing valve 500 is upstream of the second filter element assembly 200 in the direction of water flow, the hot water flowing out of the water heater 1000 and the cold water flowing out of the connecting pipe 600 are filtered by the second filter element assembly 200 and then flow out of the water outlet pipe 402; when the mixing valve 500 is downstream of the second filter element assembly 200 in the direction of water flow, the hot water flowing out of the water heater 1000 is filtered by the second filter element assembly 200 and mixed with the cold water flowing out of the connecting pipe 600 and then flows out of the water outlet pipe 402. Thus, the needs of different water heaters 1000 can be met by different connection positions of the connecting pipe 600.

[0128] In a specific embodiment of the present invention, Figure 7 As shown, one end of the connecting pipe 600 is connected between the inner tank 400 and the first filter element assembly 100, and the mixing valve 500 is upstream of the second filter element assembly 200 in the direction of water flow. As a result, the cold water in the water inlet pipe 401 is first filtered by the first filter element assembly 100, and part of the cold water flows into the inner tank 400 for heating and flows from the inner tank 400 to the water outlet pipe 402 and flows into the mixing valve 500 and the remaining cold water flowing from the connecting pipe 600 to the mixing valve 500. After being filtered by the second filter element assembly 200, it flows out from the water outlet pipe 402. At this time, the water flowing out of the water outlet pipe 402 is filtered by the first filter element assembly 100 and the second filter element assembly 200.

[0129] In a specific embodiment of the present invention, Figure 6As shown, one end of the connecting pipe 600 is connected between the inner tank 400 and the first filter element assembly 100, and the mixing valve 500 is downstream of the second filter element assembly 200 in the direction of water flow. As a result, the cold water in the water inlet pipe 401 is first filtered by the first filter element assembly 100, and part of the cold water flows into the inner tank 400 for heating and flows from the inner tank 400 to the water outlet pipe 402 and flows into the second filter element assembly 200 for filtration and mixes with the remaining cold water flowing from the connecting pipe 600 to the mixing valve 500, and then flows out from the water outlet pipe 402. At this time, part of the water flowing out of the water outlet pipe 402 is filtered by the first filter element assembly 100 and the second filter element assembly 200, and the rest of the water is filtered by the first filter element assembly 100.

[0130] In a specific embodiment of the present invention, Figure 5 As shown, one end of the connecting pipe 600 is connected to the upstream of the first filter core assembly 100 in the direction of water flow, and the mixing valve 500 is connected to the upstream of the second filter core assembly 200 in the direction of water flow. As a result, part of the cold water in the water inlet pipe 401 flows into the inner tank 400 through the first filter core assembly 100 and flows from the inner tank 400 to the water outlet pipe 402 and flows into the mixing valve 500 and mixes with the remaining part of the cold water flowing from the connecting pipe 600 to the mixing valve 500, and then flows out from the water outlet pipe 402 after being filtered by the second filter core assembly 200. At this time, part of the water flowing out of the water outlet pipe 402 is filtered by the first filter core assembly 100 and the second filter core assembly 200, and the remaining part of the water is filtered by the second filter core assembly 200.

[0131] In a specific embodiment of the present invention, Figure 4 As shown, one end of the connecting pipe 600 is connected to the upstream of the first filter element assembly 100 in the direction of water flow, and the mixing valve 500 is connected to the downstream of the second filter element assembly 200 in the direction of water flow, so that part of the cold water in the water inlet pipe 401 flows into the inner tank 400 through the first filter element assembly 100 and flows from the inner tank 400 to the water outlet pipe 402 and flows into the second filter element assembly 200 for filtration, and then mixes with the remaining cold water flowing from the connecting pipe 600 to the mixing valve 500, and then flows out from the water outlet pipe 402. At this time, part of the water flowing out of the water outlet pipe 402 is filtered by the first filter element assembly 100 and the second filter element assembly 200, and the remaining water is not filtered.

[0132] In some embodiments of the present invention, the filter element 11 of the first filter element assembly 100 is a first filter element 17, and the first filter element 17 includes a first filter material, which is arranged in the housing 111, and the first filter material is an adsorptive filter material, a displacement ion filter material, or an anti-ion agglomeration filter material. Thus, by setting the first filter material, the filter element 11 of the first filter element assembly 100 can achieve a good filtering effect on water, so that the user can get a good use experience. At the same time, the adsorptive filter material has a good adsorption and purification effect, the cost is low, 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 first filter material can be an adsorptive material such as PP cotton (Poly series artificial chemical fiber), activated carbon, etc., and the first filter material can also be selected from resin, TAC (Template Asi sted 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.

[0133] In some embodiments of the present invention, the first filter material is a sheet filter material, a granular filter material or a cotton filter material. Therefore, the first filter material can be a sheet filter material, the first filter material can also be a granular filter material, and the first filter material can also be a cotton filter material. Since the first filter material has less interception effect on the water flow, the water flow can flow through the first filter material more smoothly and flow out of the filter element 11, so that the water inlet of the water heater 1000 is smoother, and the water heater 1000 can operate stably and normally.

[0134] In some embodiments of the present invention, the filter element 11 of the second filter element assembly 200 is a second filter element 11, and the second filter element 11 includes a second filter material, which is arranged in the housing 111, and the second filter material is a slow-release filter material. Thus, the second filter material of the second filter element assembly 200 is a slow-release filter material, which can treat the substances that irritate the skin in the water, and avoid the user from having skin problems due to contact with the water flow. Specifically, the substrate of the second filter material can be a sugar base or a wax base, etc., and the additive can be a solute with a special smell such as lavender or lemon, so that the water flow treated by the second filter element assembly 200 has a special smell such as lavender or lemon, so that the user's bathing comfort can be improved; the additive can also be a hyaluronic acid or other hydrating substance, so that the skin can be hydrated during the user's bathing process; the additive can also be a substance that can remove residual chlorine in the water, such as ascorbic acid, so that the symptoms such as skin itching caused by residual chlorine in the water can be better avoided, so as to improve the user's bathing comfort.

[0135] The following describes a first embodiment of the present invention in which when the filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011.

[0136] [Example 1]

[0137] In some embodiments of the present invention, Figure 9-11 As shown, the filter element 11 also includes an elastic member 13, which is arranged on the side of the water stop member 12 away from the water inlet hole 1111. One end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12 to push the water stop member 12 to close the water inlet hole 1111. Therefore, when the filter element 11 and the filter element mounting seat 10 are assembled, the elastic member 13 is squeezed and deformed. When the filter element 11 is removed from the mounting seat body 101, the elastic member 13 restores the original state through deformation and releases the stored force, so that the water stop member 12 automatically re-blocks the water inlet hole 1111 under the action of the elastic member 13, thereby reducing the user's manual operation and making it more convenient and easy for the user to replace the filter element 11.

[0138] Furthermore, the water stopper 12 is made of silicone rubber, EPDM rubber, NBR rubber, fluororubber, etc. Thus, the water stopper 12 has elasticity, and when the water inlet hole 1111 is blocked, the water stopper 12 and the outer periphery of the water inlet hole 1111 can be sealed.

[0139] In some embodiments of the present invention, Figure 9-11 As shown, a circular mounting groove 121 is provided on the side of the water stop 12 facing away from the water inlet hole 1111, and the elastic member 13 is a spring, one end of which extends into the mounting groove 121 and is fixedly connected to the water stop 12. When assembling the filter element 11 of this embodiment, the elastic member 13 can be pre-assembled with the water stop 12 and then fixedly assembled into the housing 111. Specifically, the upper end of the elastic member 13 extends into the mounting groove 121 and is connected and fixed to the water stop 12. The elastic member 13 and the water stop 12 are then installed into the housing 111 together, so that the water stop 12 abuts against the water inlet hole 1111. A mounting groove 121 is provided on one side of the water stop 12 and one end of the elastic member 13 extends into the mounting groove 121, so that the connection between the elastic member 13 and the water stop 12 can be more reliable and relative displacement can be better avoided, so that the elastic member 13 can reliably and stably support and press the water stop 12, so that the water stop 12 can stably and reliably block the water inlet hole 1111. The elastic member 13 is set as a spring, which has a simple structure and good stability.

[0140] In some embodiments of the present invention, Figure 9-11As shown, the filter element 11 further includes: a positioning member 14, the positioning member 14 is arranged in the housing 111 and is located on the side of the elastic member 13 away from the water stop member 12, the positioning member 14 is fixed to the housing 111, and the elastic member 13 is connected between the positioning member 14 and the water stop member 12. It can be understood that the blocking effect of the water stop member 12 on the water inlet hole 1111 greatly affects the situation of the water stored in the filter element 11 being spilled when the filter element 11 is replaced. In this embodiment, the positioning member 14 is fixed to the housing 111, and the positioning member 14 can reliably support and fix the elastic member 13, so that the elastic member 13 can stably and reliably support the water stop member 12 and make the water stop member 12 abut against and seal the water inlet hole 1111 securely, so that the filter element 11 can effectively and stably prevent the water stored in the filter element 11 from spilling when it is replaced, thereby improving the user's experience when replacing the filter element 11.

[0141] In some embodiments of the present invention, Figure 9-11 As shown, a first supporting rib 1113 is formed on the inner wall surface of the housing 111, and the first supporting rib 1113 extends in a ring shape along the circumference of the housing 111. The positioning member 14 is arranged on the side of the first supporting rib 1113 facing the water stop member 12, and the outer peripheral edge of the positioning member 14 is supported on the first supporting rib 1113. Therefore, the first supporting rib 1113 is arranged in a ring shape and supports the outer peripheral edge of the positioning member 14, so that the positioning member 14 can be supported on the first supporting rib 1113 as a whole in a relatively stable manner. The first supporting rib 1113 has a simple structure, is easy to process and shape, and has stable support.

[0142] The following describes a second embodiment of the present invention in which when the filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011.

[0143] [Example 2]

[0144] In some embodiments of the present invention, Fig. 9 and Fig.10As shown, the filter element mounting seat 10 includes a mounting seat body 101 and a push rod 102. The mounting seat body 101 is formed with a water inlet interface 1011 and a water outlet interface 1012. The mounting seat body 101 is detachably connected to the filter element 11. One end of the push rod 102 is connected to the mounting seat body 101, and the other end of the push rod 102 passes through the water inlet hole 1111 and extends into the shell 111 to push the water stop member 12 to open the water inlet hole 1111. Therefore, the elastic member 13 is arranged to push the water stop member 12 to close the water inlet hole 1111, so that when the filter element 11 is assembled with the filter element mounting seat 10, the elastic member 13 can absorb and store the force of the push rod 102 through deformation in the process of pushing the water stop member 12 to open. When the filter element 11 is removed from the mounting seat body 101, the elastic member 13 restores the original state through deformation and releases the stored force. The arrangement of the push rod 102 increases the probability of the water stop member 12 opening the water inlet hole 1111 when the filter element 11 is connected to the filter element mounting seat 10, thereby further improving reliability.

[0145] Furthermore, the mounting seat body 101 is integrally formed with the push rod 102. Therefore, when the filter element mounting seat 10 and the filter element 11 are assembled, the push rod 102 and the mounting seat body 101 are assembled together, which simplifies the operation process during assembly and improves assembly efficiency.

[0146] In some embodiments of the present invention, Fig. 9 , Fig.12 and Fig.13 As shown, the filter element 11 is rotatably connected to the filter element mounting seat 10, and the water inlet hole 1111 is an arc-shaped hole extending along the circumference of the housing 111. It can be understood that the rotatable connection is convenient to operate and the connection is tight, which can make the installation and removal of the filter element 11 more convenient and ensure the reliability of the connection between the filter element 11 and the filter element mounting seat 10. The arc-shaped water inlet hole 1111 can provide an avoidance space for the top rod 102 extending into the water inlet hole 1111. During the relative rotation of the filter element mounting seat 10 and the filter element 11 to achieve the clamping connection, the filter element mounting seat 10 can drive the top rod 102 to move in the arc-shaped water inlet hole 1111, so that the filter element 11 and the filter element mounting seat 10 can be assembled. At the same time, as the filter element mounting seat 10 and the filter element 11 are continuously clamped, the top rod 102 will push the water stop member 12 so that the water stop member 12 compresses the elastic member 13 to open the water inlet hole 1111. When the filter element 11 needs to be removed from the filter element mounting seat 10, the filter element 11 and the filter element mounting seat 10 are relatively rotated in the opposite direction of assembly to release the clamping connection, and the filter element 11 can be removed from the filter element mounting seat 10.

[0147] In some embodiments of the present invention, Figure 8As shown, a sliding rib 15 is formed on the outer side of the filter element 11, and a sliding rail 1013 is formed on the inner wall of the filter element mounting seat 10. The filter element 11 and the filter element mounting seat 10 are rotationally connected through the cooperation of the sliding rib 15 and the sliding rail 1013. In the process of rotationally clamping the sliding rib 15 and the sliding rail 1013, the cooperation between the sliding rib 15 and the sliding rail 1013 can play a guiding role, thereby reducing the difficulty of operation during rotational clamping and improving assembly efficiency.

[0148] In some embodiments of the present invention, Fig.13 As shown, there are multiple push rods 102, and the multiple push rods 102 are arranged at intervals along the circumference of the shell 111. For example, there can be two, three or four push rods 102. Therefore, each push rod 102 can push the water stop member 12 to open the water inlet hole 1111, which can increase the probability that the water stop member 12 opens the water inlet hole 1111 when the filter element 11 and the filter element mounting seat 10 are connected, thereby improving reliability. At the same time, multiple push rods 102 apply a force to the water stop member 12 in the circumferential direction, which can make the gap between the water stop member 12 and the water inlet hole 1111 more uniform, so that the water flow impact force on the water stop member 12 is more uniform, thereby reducing the probability of failure of the connection between the water stop member 12 and the elastic member 13, and reducing the failure rate.

[0149] The following describes a third embodiment of the present invention in which when the filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011.

[0150] [Example 3]

[0151] In some embodiments of the present invention, Figure 16-Figure 21 As shown, the filter element 11 also includes: a push rod 16, which is inserted into the water inlet hole 1111 and cooperates with the clearance of the peripheral wall of the water inlet hole 1111, one end of the push rod 16 is fixed to the water stop member 12 and the other end extends out of the shell 111, when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 abuts against the push rod 16 and pushes the water stop member 12 through the push rod 16 to open the water inlet hole 1111. Therefore, the elastic member 13 is arranged to push the water stop member 12 to close the water inlet hole 1111, so that when the filter element 11 is assembled with the filter element mounting seat 10, the elastic member 13 can absorb and store the force of the push rod 16 by deformation in the process of pushing the water stop member 12 to open. When the filter element 11 is removed from the mounting seat body 101, the elastic member 13 restores the original state by deformation and releases the stored force. The arrangement of the push rod 16 increases the probability of the water stop member 12 opening the water inlet hole 1111 when the filter element 11 is connected to the filter element mounting seat 10, thereby further improving reliability.

[0152] In some embodiments of the present invention, Fig.18 and Fig.19 As shown, the water inlet hole 1111 includes a first hole section 1111a and a second hole section 1111b. The first hole section 1111a is located on the side of the second hole section 1111b facing the water inlet interface 1011. The aperture of the first hole section 1111a is smaller than the aperture of the second hole section 1111b. A limiting boss 161 is provided at one end of the push rod 16 connected to the water stop member 12. The cross-sectional size of the limiting boss 161 is larger than the cross-sectional size of the first hole section 1111a. When the water stop member 12 blocks the water inlet hole 1111, the limiting boss 161 cooperates in the second hole section 1111b. Therefore, during the installation and disassembly of the filter element 11 and the filter element mounting seat 10, the inner wall of the second hole section 1111b can prevent the push rod 16 from detaching from the filter element 11. At the same time, the second hole section 1111b provides a placement space for the limiting boss 161, and the push rod 16 will not block the water stop member 12 from blocking the water inlet hole 1111. In addition, the limiting boss 161 can increase the contact area between the push rod 16 and the water stop member 12, making the connection between the push rod 16 and the water stop member 12 more stable.

[0153] In some embodiments of the present invention, Fig. 20 As shown, there are multiple push rods 16, and the multiple push rods 16 are arranged at intervals along the circumference of the shell 111. For example, the number of push rods 16 can be two, three or four. Therefore, each push rod 16 can push the water stop member 12 to open the water inlet hole 1111, which can increase the probability that the water stop member 12 opens the water inlet hole 1111 when the filter element 11 and the filter element mounting seat 10 are connected, thereby improving reliability. At the same time, multiple push rods 16 apply a force to the water stop member 12 in the circumferential direction, which can make the gap between the water stop member 12 and the water inlet hole 1111 more uniform, so that the water flow impact force on the water stop member 12 is more uniform, thereby reducing the probability of failure of the connection between the water stop member 12 and the elastic member 13 and reducing the failure rate.

[0154] A first embodiment of the first filter element 17 of the first filter element assembly 100 of the present invention is described below.

[0155] [Example 1]

[0156] In some embodiments of the present invention, Figure 8-Figure 11As shown, the filter element 11 of the first filter element assembly 100 is a first filter element 17, and the first filter element 17 further includes a central tube 171 and a filter material cover 172. Specifically, the central tube 171 is arranged in the housing 111, and a first water hole 1711 is formed on the central tube 171 and penetrates the central tube 171 in a radial direction. The filter material cover 172 is arranged in the housing 111 and connected to the central tube 171. The filter material cover 172 is located on the side of the central tube 171 facing the water inlet 1111, wherein the filter material cover 172, the outer wall surface of the central tube 171 and the inner wall surface of the housing 111 cooperate to define a filter material cavity 173 filled with the first filter material, and the inner side of the central tube 171 defines a first water outlet channel, the filter material cavity 173 is connected to the water inlet 1111, the first water outlet channel is connected to the water outlet 1112 of the housing 111, and the first water outlet channel and the filter material cavity 173 are connected through the first water hole 1711.

[0157] When the water heater 1000 is in operation, the water in the water inlet pipe 401 flows from the water inlet interface 1011 to the water inlet hole 1111 and enters the filter cavity 173. The first filter material in the filter cavity 173 filters the incoming water. The filtered water flows from the first water hole 1711 to the first water outlet channel. The filtered water flows along the first water outlet channel to the water outlet hole 1112 and flows out from the water outlet hole 1112 to the inner tank 400.

[0158] At the same time, by arranging a central tube 171 and a filter material cover 172 in the shell 111, a filter material cavity 173 for storing the first filter material is defined by the central tube 171, the filter material cover 172 and the shell 111. The first filter material can be conveniently and stably stored in the filter material cavity 173, thereby ensuring the use effect of the filter material. The structure is simple and the use effect is good.

[0159] Furthermore, the inner side of the central tube 171 defines a central channel 1712, the filter material chamber 173 is connected to the water inlet interface 1011 through the water inlet hole 1111, the central channel 1712 is connected to the water outlet interface 1012 through the water outlet hole 1112, and the filter material chamber 173 and the central channel 1712 are connected through the first water hole 1711. Thus, water flows into the filter element 11 assembly from the water inlet interface 1011, and flows into the filter material chamber 173 through the water inlet hole 1111, and the first filter material in the filter material chamber 173 filters the water, and then the water flows into the central channel 1712 in the central tube 171 from the first water hole 1711, and enters the water outlet interface 1012 through the central channel 1712 and the water outlet hole 1112, and flows out of the filter element 11 assembly from the water outlet interface 1012, thereby completing the filtering process of the water flow in the first filter element assembly 100.

[0160] Furthermore, the first filter element assembly 100 has a water stop member 12, whereby when the first filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011, so that when the water heater 1000 is running, the water in the water inlet pipe 401 flows from the water inlet interface 1011 to the water inlet hole 1111 and enters the filter material cavity 173, the first filter material in the filter material cavity 173 filters the incoming water, and the filtered water flows from the first water hole 1711 to the first water outlet channel, and the filtered water flows along the first water outlet channel to the water outlet hole 1112 and flows out from the water outlet hole 1112 to the inner tank 400.

[0161] In some embodiments of the present invention, Fig.11 , Fig.15 and Fig.19 As shown, a plurality of first limiting ribs 1114 are provided on the bottom wall inside the shell 111, and the plurality of first limiting ribs 1114 are arranged at intervals around the central tube 171, and the filter material cover 172 has a limiting portion 1721, one end of the central tube 171 is limitedly matched with the limiting portion 1721, and the other end of the central tube 171 is limitedly matched with the inner side of the plurality of first limiting ribs 1114. Therefore, by setting a plurality of first limiting ribs 1114, the displacement of one end of the center tube 171 toward the bottom wall of the cavity can be limited, and by the limiting portion 1721 cooperating with the upper end of the center tube 171, the displacement of one end of the center tube 171 away from the bottom wall of the cavity can be limited. In this way, when water flows through the first filter material to impact the center tube 171, the first limiting rib 1114 and the limiting portion 1721 prevent the displacement of the center tube 171 from both ends of the center tube 171, thereby reducing the probability of excessive displacement of the center tube 171 due to water flow impacting the center tube 171, and at the same time, reducing the probability of the center tube 171 squeezing the first filter material and causing the first filter material to flee to other parts, thereby improving the reliability of the first filter element assembly 100 during operation.

[0162] In some embodiments of the present invention, Fig.11 , Fig.15 and Fig.19 As shown, the limiting portion 1721 is formed as a limiting groove, and one end of the central tube 171 is provided with a limiting ring protruding outward along the radial direction of the central tube 171, and the limiting ring extends along the circumferential direction of the central tube 171, and the limiting ring is limitedly fitted in the limiting groove. Therefore, when the central tube 171 is displaced, the inner wall of the limiting groove will abut against the outer wall of the central tube 171, thereby preventing the displacement of the central tube 171. In addition, during assembly, the cooperation between the central tube 171 and the limiting groove can also play a positioning role, further reducing the difficulty of assembly and improving assembly efficiency.

[0163] In some embodiments of the present invention, Fig.10 , Fig.13 and Fig.14As shown, the filter material cover 172 includes a cover body 1722 and a first tube portion 1723. The cover body 1722 is a plate body arranged perpendicular to the axis of the central tube 171. The first tube portion 1723 is connected to the cover body 1722 and extends along the axial direction of the central tube 171. The inner side of the first tube portion 1723 defines an intermediate channel. The shell 111 has a second tube portion 1114. The second tube portion 1114 extends along the axial direction of the central tube 171 and defines a water outlet 1112 on the inner side. The first tube portion 1723 and the second tube portion 1114 are sealed and sleeved, and the water outlet 1112 is connected to the first water outlet channel through the intermediate channel. Therefore, after the first filter material filters the water flow, the water flow enters the central tube 171 from the first water hole 1711, and then enters the middle channel and flows out from the water outlet 1112, thereby completing the filtering process of the water flow by the first filter element 17, wherein the sealing sleeve of the first tube portion 1723 and the second tube portion 1114 can isolate the unfiltered water from the filtered water, preventing the water from flowing out from the water outlet 1112 without being filtered, thereby ensuring the filtering effect of the first component filter element 11.

[0164] In some embodiments of the present invention, Fig. 9 , Fig.13 and Fig.14 As shown, a through hole 1724 penetrating the filter cover 172 is formed on the filter cover 172, and the first filter element 17 further includes a filter screen 175, which is arranged on the filter cover 172 and covers the through hole 1724. It can be understood that the filter chamber 173 is connected with the water inlet hole 1111 through the through hole 1724, so that the water flow entering from the water inlet hole 1111 passes through the through hole 1724 and enters the filter chamber 173. At the same time, the filter screen 175 filters the water flow passing through the through hole 1724, blocks large particles of impurities in the water flow from entering the filter chamber 173, and prevents large particles of impurities from entering the first filter material to reduce the filtering effect of the first filter material, thereby improving the filtering effect of the filter element 11 and the service life of the first filter material.

[0165] In some embodiments of the present invention, the filter screen 175 is made of stainless steel, which has low cost and stable chemical properties, and can reduce the production cost of the filter element 11 and increase the service life of the filter screen 175 .

[0166] In some embodiments of the present invention, the size of the filter screen 175 is 30-100 mesh, so that the filtering effect of the filter screen 175 can be guaranteed without affecting the speed of water flowing through the filter screen 175. In addition, the filter screen 175 can also prevent the first filter material from escaping from the mesh of the first filter material.

[0167] In some embodiments of the present invention, Fig.11 and Fig.19As shown, the housing 111 includes a first housing 1116 and a second housing 1117, one end of the first housing 1116 is open, the second housing 1117 is arranged at the open end of the first housing 1116, one end of the second housing 1117 facing the first housing 1116 is open and detachably connected to the first housing 1116, the center tube 171 is arranged in the first housing 1116, and the water inlet 1111 and the water outlet 1112 are both formed in the second housing 1117. In this way, when the parts in the first filter element 17 are damaged, the first housing 1116 and the second housing 1117 can be disassembled to repair and replace the parts in the first filter element 17, thereby improving the service life of the first filter element 17.

[0168] In some embodiments of the present invention, Fig. 9 and Fig.11 As shown, a first sealing groove 17221 is formed on the cover body 1722, and a ninth sealing ring 17222 is arranged in the first sealing groove 17221. The first sealing groove 17221 extends around the filter material cover 172, and the ninth sealing ring 17222 abuts between the groove wall of the first sealing groove 17221 and the inner circumferential wall of the shell 111. By setting the first sealing groove 17221, a layout space can be provided for the ninth sealing ring 17222, thereby reducing the probability of displacement of the ninth sealing ring 17222 between the filter material cover 172 and the inner circumferential wall of the shell 111. By setting the ninth sealing ring 17222, sealing between the filter material cover 172 and the inner circumferential wall of the shell 111 can be achieved, thereby preventing water from entering the filter material cavity 173 without being filtered by the filter screen 175, thereby ensuring the filtering effect of the first filter element 17 and improving the service life of the first filter element 17.

[0169] In some embodiments of the present invention, Fig.10 and Fig.11 As shown, a second sealing groove 17231 is formed on the outer peripheral wall of the first tube portion 1723, and the second sealing groove 17231 extends around the first tube portion 1723. A second sealing ring 17232 is provided in the second sealing groove 17231, and the second sealing ring 17232 abuts between the groove wall of the second sealing groove 17231 and the inner wall surface of the second tube portion 1114. By setting the second sealing groove 17231, an arrangement space can be provided for the second sealing ring 17232, thereby reducing the probability of displacement of the second sealing ring 17232 between the first tube portion 1723 and the second tube portion 1114. By setting the second sealing ring 17232, the sealing between the first tube portion 1723 and the second tube portion 1114 can be achieved, thereby ensuring the filtering effect of the first filter element 17.

[0170] In some embodiments of the present invention, Fig.10 and Fig.11As shown, a third sealing groove 11161 is formed on the inner wall surface of the first shell 1116, and the third sealing groove 11161 extends around the inner wall surface of the first shell 1116. A third sealing ring 11162 is provided in the third sealing groove 11161, and the third sealing ring 11162 abuts between the groove wall of the third sealing groove 11161 and the outer wall surface of the second shell 1117. By setting the third sealing groove 11161, an arrangement space can be provided for the third sealing ring 11162, thereby reducing the probability of the third sealing ring 11162 being displaced between the first shell 1116 and the second shell 1117. By setting the third sealing ring 11162, the sealing between the first shell 1116 and the second shell 1117 can be achieved, thereby reducing the probability of water in the first filter element 17 flowing out from the gap between the first shell 1116 and the second shell 1117. At the same time, the probability of external impurities entering the first filter element 17 from the gap between the first shell 1116 and the second shell 1117 is reduced, thereby improving the user experience.

[0171] In some embodiments of the present invention, Fig.10 and Fig.11 As shown, the outer peripheral wall of the second housing 1117 is formed with a fifth sealing groove 11171, the fifth sealing groove 11171 extends around the second housing 1117, and a fifth sealing ring 11172 is arranged in the fifth sealing groove 11171, and the fifth sealing ring 11172 abuts between the groove wall of the fifth sealing groove 11171 and the inner wall surface of the filter element mounting seat 10. By providing the fifth sealing groove 11171, a layout space can be provided for the fifth sealing ring 11172, reducing the probability of displacement of the fifth sealing ring 11172 between the second housing 1117 and the filter element mounting seat 10. By providing the fifth sealing ring 11172, the sealing between the second housing 1117 and the filter element mounting seat 10 can be achieved, that is, the sealing between the first filter element 17 and the filter element mounting seat 10 can be achieved, thereby reducing the probability of water flowing out from the gap between the filter element mounting seat 10 and the first filter element 17, and improving the user experience.

[0172] In some embodiments of the present invention, Fig.10 and Fig.11As shown, a fourth sealing groove 11141 is formed on the outer peripheral wall of the second tube portion 1114, a fourth sealing ring 11142 extends around the second tube portion 1114, a fourth sealing ring 11142 is arranged inside the fourth sealing ring 11142, and the fourth sealing ring 11142 abuts between the groove wall of the fourth sealing ring 11142 and the inner wall surface of the installation groove 121 of the filter element 11. By providing the fourth sealing ring 11142, a layout space can be provided for the fourth sealing ring 11142, reducing the probability of displacement of the fourth sealing ring 11142 between the second tube portion 1114 and the filter element mounting seat 10. By providing the fourth sealing ring 11142, the sealing between the second tube portion 1114 and the filter element mounting seat 10 can be achieved, reducing the probability of water flowing out of the water outlet 1112 without being filtered, thereby ensuring the filtering effect of the first filter element 17.

[0173] In some embodiments of the present invention, the axes of the central tube 171, the filter material cover 172 and the housing 111 coincide with each other, so that the structure of the first filter element 17 has a high degree of symmetry, which can improve the stability of the first filter element assembly 100 during use.

[0174] A second embodiment of the first filter element 17 of the first filter element assembly 100 of the present invention is described below.

[0175] [Example 2]

[0176] In some embodiments of the present invention, Figure 23-Figure 29 As shown, the filter element 11 of the first filter element assembly 100 is a first filter element 17, and the first filter element 17 also includes a first filter material box 18. The first filter material box 18 is arranged in the housing 111, and the first filter material box 18 includes a filter material box upper cover 181 and a filter material box lower shell 182. The side of the filter material box upper cover 181 away from the water inlet hole 1111 has an annular filter screen 1811 extending along the circumferential direction of the filter material box upper cover 181. The end of the filter material box lower shell 182 close to the water inlet hole 1111 extends into the filter material box upper cover 181. The filter material box lower shell 182 is used to accommodate the first filter material. The outer peripheral wall of the filter box upper cover 181 and the shell body 111 jointly define a first water inlet channel 1812, and a second water outlet channel 1821 is defined in the filter box lower shell 182. The peripheral wall of the filter box lower shell 182 has a water opening 1822 for connecting the first water inlet channel 1812 and the second water outlet channel 1821, and the filter box upper cover 181 has a connecting opening 1813 for connecting the second water outlet channel 1821 and the water outlet hole 1112.

[0177] It can be understood that the first filter material in the filter box lower shell 182 can filter and purify the liquid entering the filter box lower shell 182, and the annular filter mesh 1811 can preliminarily filter and purify the liquid entering the filter box lower shell 182 to improve the purification effect. At the same time, the annular filter mesh 1811 is arranged on the outside of the filter box lower shell 182 to reduce the leakage of the filter material.

[0178] The axial direction of the filter box lower shell 182 is the height direction of the filter box lower shell 182. At a certain height position of the filter box lower shell 182, there are multiple water openings 1822 spaced apart along the circumferential direction of the filter box lower shell 182. Each water opening 1822 extends along the circumferential direction of the filter box lower shell 182. In addition, multiple water openings 1822 are also spaced apart in the axial direction of the filter box lower shell 182. The water openings 1822 are used for liquid to enter or flow out of the filter box lower shell 182. In the axial direction of the filter box lower shell 182, adjacent water openings 1822 are spaced apart to prevent filter material from leaking out. As a result, liquid can enter the filter box lower shell 182 from the first water inlet channel 1812, and leakage of the first filter material from the peripheral wall of the filter box lower shell 182 can be reduced.

[0179] like Figure 3 As shown, the communication port 1813 has a stopper 18131, the stopper 18131 includes a circular portion 18132 and a connecting portion 18133, the axes of the circular portion 18132 and the communication port 1813 coincide, the circular portion 18132 has a through hole 1724 connected to the communication port 1813, the connecting portion 18133 extends from the outer edge of the circular portion 18132 to the inner wall surface of the communication port 1813, and the connecting portion 18133 is arranged at intervals along the circumferential direction of the circular portion 18132 Multiple connecting parts 18133 are used to connect the inner wall of the annular part 18132 and the connecting port 1813, and can also prevent the first filter material from leaking out. The filtered liquid can flow to the second water outlet channel 1821 through the gaps between adjacent connecting parts 18133 and the through holes 1724 of the annular part 18132. In this way, the liquid can flow out of the first filter material box 18 and flow to the second water outlet channel 1821, and the leakage of the first filter material from the upper cover of the first filter material box 18 can be reduced.

[0180] It should be noted that in Fig.25 In the example shown, there are four connecting parts 18133, but the present invention is not limited to this. The connecting parts 18133 can be more or less, such as 2, 5, 6 or 7.

[0181] Furthermore, the first filter element assembly 100 has a water stopper 12, which is arranged in the housing 111 and between the filter box upper cover 181 and the water inlet hole 1111. Therefore, when the first filter element 17 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stopper 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011, so that when the water heater 1000 is running, the water in the water inlet pipe 401 flows from the water inlet interface 1011 to the water inlet hole 1111 and enters the first water inlet channel 1812, and the first filter material in the filter box lower shell 182 filters the inlet water, and the filtered water flows from the water port 1822 to the second water outlet channel 1821 and flows to the water outlet hole 1112 and flows out from the water outlet hole 1112 to the inner tank 400.

[0182] Furthermore, if Fig. 22 and Fig.25 As shown, the side of the filter box upper cover 181 facing the water stop member 12 has a first positioning structure 1816 for limiting the movement of the elastic member 13, thereby allowing the elastic member 13 to be fixed on the filter box upper cover 181, so that the elastic member 13 can drive the water stop member 12 to move, thereby ensuring the reliability of the water stop member 12 in blocking the water inlet hole 1111.

[0183] In some embodiments of the present invention, Fig. 22 and Fig.25 As shown, the first positioning structure 1816 is a positioning protrusion 1815 provided on the filter box upper cover 181, and the positioning protrusion 1815 is a plurality of positioning protrusions 1815 arranged at intervals along the circumferential direction of the filter box upper cover 181 or the positioning protrusion 1815 extends in a ring shape along the circumferential direction of the filter box upper cover 181, and the end of the elastic member 13 away from the water stop member 12 is located in the space defined by the positioning protrusion 1815. The setting of the positioning protrusion 1815 can limit the elastic member 13, prevent the elastic member 13 from moving in the radial direction, improve the structural stability, and thus ensure the reliability of the water stop member 12 in blocking the water inlet hole 1111.

[0184] exist Figure 3 In the example shown, there are four positioning protrusions 1815 spaced apart in the circumferential direction of the shell 111, and the four positioning protrusions 1815 are evenly spaced apart, but the present invention is not limited to this. The positioning protrusions 1815 can be more or less, such as 3, 5, 6 or 7, etc. At the same time, the positioning protrusions 1815 can also be ring-shaped extending in the circumferential direction of the filter box cover 181.

[0185] The steps for installing the first filter element 17 are: putting the first filter material into the filter box lower shell 182, the filter box lower shell 182 and the filter box upper cover 181 are matched and connected, and finally installed with the shell body 111, wherein the filter box lower shell 182 and the filter box upper cover 181 can be fixedly connected by means of threads or ultrasonic welding.

[0186] In some embodiments of the present invention, Fig.23 and Fig.26 As shown, a sixth sealing ring 1814 is provided between the inner peripheral wall of the filter box upper cover 181 and the outer peripheral wall of the filter box lower shell 182. It is understandable that the sixth sealing ring 1814 and the inner peripheral wall of the filter box upper cover 181 and the outer peripheral wall of the filter box lower shell 182 can be interference fit, so that the filter box upper cover 181 and the filter box lower shell 182 are reliably connected, thereby improving the sealing performance and further preventing the first filter material from leaking out. In addition, an annular groove is provided on the peripheral wall of the upper end of the filter box lower shell 182, and the annular groove extends inwardly in the radial direction of the filter box lower shell 182. The sixth sealing ring 1814 is arranged in the annular groove, so that the sixth sealing ring 1814 is not easy to move relative to the filter box lower shell 182, thereby improving the fixing effect.

[0187] In some embodiments of the present invention, Fig.23 and Fig.26 As shown, the outer peripheral wall of the filter box lower shell 182 is provided with a limiting rib 1823 extending along the circumferential direction of the filter box lower shell 182, and one end of the filter box upper cover 181 away from the water inlet hole 1111 is supported on the limiting rib 1823. Therefore, after the filter box lower shell 182 and the filter box upper cover 181 are assembled, the filter box upper cover 181 is prevented from moving downward relative to the filter box upper cover 181, thereby improving the assembly stability of the filter box lower shell 182 and the filter box upper cover 181, and at the same time, the first filter material can be further prevented from flowing out of the gap between the filter box lower shell 182 and the filter box upper cover 181.

[0188] In some embodiments of the present invention, Fig.23 and Fig. 27 As shown, the inner circumferential wall of the shell 111 away from the water inlet hole 1111 is provided with fixing ribs 1118 , and the fixing ribs 1118 are multiple and spaced apart along the circumferential direction of the shell 111 . The first filter material box 18 is located in the space defined by the multiple fixing ribs 1118 .

[0189] It can be understood that one end of the fixing rib 1118 is connected to the inner circumferential wall of the shell 111 away from the water inlet hole 1111, and the other end extends inwardly along the radial direction of the shell 111. The fixing rib 1118 can position the first filter box 18 from the circumferential direction of the first filter box 18 to prevent the first filter box 18 from moving in the shell 111, thereby improving the fixing effect of the first filter box 18, thereby further preventing the first filter material from leaking out, and at the same time ensuring that the axis of the first filter box 18 coincides with the axis of the shell 111, which can ensure that the water outlet hole 1112 is opposite to the second water outlet channel 1821, avoiding mixing of liquid in the second water outlet channel 1821 and the first water inlet channel 1812, ensuring the filtering effect of the filter element 11, and improving the user experience.

[0190] For example, in Fig. 27 In the example shown, there are six fixing ribs 1118 spaced apart along the circumferential direction of the housing 111. The six fixing ribs 1118 are evenly spaced apart, and can play a positioning role from the first filter material box 18 in the circumferential direction to prevent the first filter material box 18 from moving in the housing 111. However, the present invention is not limited to this, and the fixing ribs 1118 can be more or less spaced apart along the circumferential direction of the housing 111, such as 2, 3, 4, 5 or 7, etc.

[0191] In some embodiments of the present invention, Fig.23 and Fig.28 As shown, one end of the housing 111 provided with the water outlet 1112 has an inwardly extending extension piece 1119, and the extension piece 1119 has a connecting channel 11191, and the connecting channel 11191 is connected with the connecting port 1813 and the water outlet 1112. The connecting channel 11191 allows the filtered liquid to flow from the second water outlet channel 1821 to the water outlet 1112, and can separate the space from the second water outlet channel 1821 to the water outlet 1112 from the space from the water inlet 1111 to the first water inlet channel 1812, so as to avoid the liquid after filtration from mixing with the liquid before filtration, and ensure the filtering effect of the filter element 11.

[0192] Furthermore, a one-way valve 11193 is provided in the connecting channel 11191 to only allow liquid to flow from the second water outlet channel 1821 to the water outlet hole 1112, to prevent liquid from flowing back or flowing into the filter element 11 from the water outlet hole 1112, to avoid affecting the outflow of filtered liquid, and to ensure the filtering effect of the filter element 11. It should be noted that the one-way valve 11193 is a device that cannot pass water in the reverse direction and requires a certain water inlet pressure to open in the forward direction. Generally, the forward water inlet pressure is set to be greater than the pressure + Mpa (relative pressure) of the water pressure acting on the water inlet of the one-way valve 11193 after the filter element 11 is filled with water. The former is to overcome the pressure acting on the one-way valve 11193 due to the weight of the water stored in the filter element 11, and Mpa is to overcome the atmospheric pressure. Among them, there is an eighth sealing ring 11194 between the outer wall of the one-way valve 11193 and the inner wall of the connecting channel 11191, which can prevent liquid from flowing between the outer wall of the one-way valve 11193 and the inner wall of the connecting channel 11191, thereby improving the sealing performance.

[0193] In some embodiments of the present invention, Fig.23 and Fig.25As shown, one end of the filter material box upper cover 181 facing the water inlet 1111 has a protrusion 1815, the communication port 1813 penetrates the protrusion 1815, and one end of the extension piece 1119 is sleeved outside the protrusion 1815. It can be understood that, through the cooperation of the extension piece 1119 and the protrusion 1815, the filter material box upper cover 181 and the housing 111 are reliably connected, the fixing effect of the first filter material box 18 is improved, thereby further preventing the first filter material from leaking out, and at the same time, the axis of the first filter material box 18 and the housing 111 can be overlapped, which can ensure that the water outlet 1112 is opposite to the second water outlet channel 1821, and the liquid in the second water outlet channel 1821 and the first water inlet channel 1812 are prevented from mixing, thereby ensuring the filtering effect of the filter element 11 and improving the user experience.

[0194] In some embodiments of the present invention, Fig.24 and Fig.25 As shown, a seventh sealing ring 11192 is provided between the inner peripheral wall of the extension piece 1119 and the outer peripheral wall of the protrusion 1815. It is understandable that the seventh sealing ring 11192 can be interference fit with the inner peripheral wall of the extension piece 1119 and the outer peripheral wall of the protrusion 1815, and can separate the space from the second water outlet channel 1821 to the water outlet hole 1112 from the space from the water inlet hole 1111 to the first water inlet channel 1812, so as to avoid the liquid after filtration from mixing with the liquid before filtration, and ensure the filtering effect of the first filter element 17.

[0195] The second filter element 2211 of the second filter element assembly 200 of the present invention is described below.

[0196] In some embodiments of the present invention, Figure 29-Figure 32 , Figure 36-Figure 39 As shown, the filter element 11 of the second filter element assembly 200 is a second filter element 2211, and the second filter element 2211 also includes a filter element cover 19 and a second filter material box 20. The filter element cover 19 is arranged on the open end of the housing 111 and is formed with a water inlet hole 1111 and a water outlet hole 1112. The second filter material box 20 is arranged in the housing 111. The second filter material box 20 has a receiving cavity 203 for receiving the second filter material. The receiving cavity 203 is suitable for communicating with the water inlet hole 1111 and the water outlet hole 1112. The second filter material box 20 is formed with a slow release hole 204, and water is suitable for flowing into or out of the receiving cavity 203 through the slow release hole 204.

[0197] It is understandable that the second filter material in the accommodating chamber 203 is used to process substances in the water that irritate the skin, so as to prevent users from having skin problems due to contact with the water flow. After water flows into the second filter element 2211 through the water inlet hole 1111 on the filter element cover 19, the water flows into the accommodating chamber 203 through the slow-release hole 204, and contacts the second filter material in the accommodating chamber 203, so that the second filter material inside the accommodating chamber 203 is slowly released and dissolved. The slowly released filter material solution in the accommodating chamber 203 can flow out of the accommodating chamber 203 through the slow-release hole 204, and dissolve in the water flow outside the accommodating chamber 203, so as to achieve the overall filtering effect of the second filter element 2211 on the water flow. The treated water flow will flow out of the accommodating chamber 203, and finally flow out of the second filter element 2211 through the water outlet hole 1112 of the filter element cover 19, thereby achieving the filtering of the water flow by the second filter element assembly 200.

[0198] Furthermore, the second filter element assembly 200 includes a water stop 12, whereby when the second filter element 2211 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011, so that when the water heater 1000 is running, the water in the water inlet pipe 401 flows from the water inlet interface 1011 to the water inlet hole 1111 and enters the second filter element 2211, and then the water flows into the container through the slow release hole 204. After being received into the cavity 203, it contacts with the second filter material in the cavity 203, so that the second filter material in the cavity 203 is slowly released and dissolved. The slowly released filter material solution in the cavity 203 can flow out of the cavity 203 through the slow release hole 204, and dissolve in the water flow outside the cavity 203, thereby realizing the filtering effect of the second filter element 2211 on the water flow as a whole. The treated water flow will flow out of the cavity 203, and finally flow out to the inner tank 400 through the water outlet hole 1112 of the filter element cover 19.

[0199] Specifically, Figure 29-Figure 43 , Fig.46 , 49 and Fig.52As shown, the second filter element assembly 200 includes a water stopper 12 and an elastic member 13, one end of the elastic member 13 is connected to the water stopper 12 and the other end of the elastic member 13 is connected to the filter element cover 19, the water stopper 12 can move to open or close the water inlet hole 1111, and the elastic member 13 is suitable for pushing the water stopper 12 to close the water inlet hole 1111. When the second filter element assembly 200 is removed from the water heater 1000, the elastic member 13 acts on the water stopper 12 through the elastic force, so that the water stopper 12 closes the water inlet hole 1111, and prevents the water flow inside the second filter element 2211 from spilling out of the water inlet hole 1111, thereby facilitating the user to remove the second filter element assembly 200. When the second filter element assembly 200 is installed on the water heater 1000, the water inlet pressure of the water inlet hole 1111 can overcome the elastic force of the elastic member 13 acting on the water stopper 12, so that the water stopper 12 opens the water inlet hole 1111. For example, the elastic member 13 can push the water stop member 12 to move in the axial direction, so that the water stop member 12 opens or closes the water inlet hole 1111 .

[0200] The filter element cover 19 includes a cover body 191 and a water outlet column 192. A second water inlet channel 193 is defined between the water outlet column 192 and the cover body 191. The second water inlet channel 193 is suitable for connecting the water inlet hole 1111 and the accommodating chamber 203. A third water outlet channel 194 is formed on the water outlet column 192. The third water outlet channel 194 is suitable for connecting the water outlet hole 1112 and the accommodating chamber 203. After water flows into the second filter element 2211 through the water inlet hole 1111 on the filter element cover 19, the water flows into the second water inlet channel 193 between the water outlet column 192 and the cover body 191, and then flows through the box cover 201 of the second filter material box 20. The water can flow into the accommodating cavity 203 through the slow-release hole 204, and contact the second filter material in the accommodating cavity 203, so that the second filter material inside the accommodating cavity 203 is slowly released and dissolved. The slowly released filter material solution can flow out of the accommodating cavity 203 by utilizing the flow of water near the slow-release hole 204, and be released in the water flow around the slow-release hole 204, thereby optimizing the water flow. Subsequently, the optimized water flows into the third water outlet channel 194 of the water outlet column 192, flows to the water outlet hole 1112 through the third water outlet channel 194, and finally flows out of the second filter element 2211 from the water outlet hole 1112, thereby completing the filtration of the water flow by the second filter element assembly 200.

[0201] For example, a one-way valve 11193 is provided in the third water outlet channel 194, and the one-way valve 11193 can ensure the flow direction of water in the third water outlet channel 194, and prevent the external water from entering the second filter element 2211 from the water outlet hole 1112, thereby ensuring the filtering effect of the second filter element assembly 200. An eighth sealing ring 11194 is provided between the one-way valve 11193 and the third water outlet channel 194, which can seal the third water outlet channel 194 and ensure that the water in the third water outlet channel 194 flows through the one-way valve 11193.

[0202] The elastic member 13 is sleeved on the outer peripheral side of the water outlet column 192, which can facilitate the connection between the elastic member 13 and the water stop member 12, and facilitate the axial positioning of the elastic member 13, thereby ensuring the effect of the elastic member 13 on the water stop member 12. At the same time, the overall structure can be made more compact, and the space utilization rate inside the second filter element assembly 200 can be improved.

[0203] In some embodiments of the present invention, Figure 29-Figure 33 and Fig.43 The second filter element assembly 200 shown includes an elastic member gland 21, the other end of the elastic member 13 is connected to the elastic member gland 21, the inner peripheral wall of the cover body 191 is formed with a first positioning groove 1911, and the elastic member gland 21 is installed and fixed in the first positioning groove 1911. The elastic member 13 is located between the water stop member 12 and the elastic member gland 21 in the axial direction, and the length of the elastic member 13 in the axial direction is jointly limited by the cooperation between the water stop member 12 and the elastic member gland 21, so that the elastic member 13 is in a compressed state, ensuring the direction and effect of the elastic force of the elastic member 13 on the water stop member 12.

[0204] The first positioning groove 1911 can limit and fix the elastic member cover 21 to prevent the elastic member cover 21 from moving in the axial direction, thereby ensuring the length of the elastic member 13 in the axial direction, and further ensuring the direction and effect of the elastic force of the elastic member 13 on the water stop member 12.

[0205] For example, the elastic member gland 21 is sleeved on the outer peripheral side of the water outlet column 192, and an elastic member baffle 211 is provided on the elastic member gland 21. The end of the elastic member 13 connected to the elastic member gland 21 is located on the inner peripheral side of the elastic member baffle 21. The elastic member baffle 211 can limit the elastic member 13 radially to prevent the end of the elastic member 13 connected to the elastic member gland 21 from moving radially, thereby improving the stability of the elastic member 13 and ensuring the effect of the elastic member 13 on the water stop member 12. A second water hole 212 is formed on the elastic member gland 21. The second water hole 212 is formed on the outer peripheral side of the elastic member baffle 21. The second water hole 212 can connect the spaces on both sides of the axial direction of the elastic member gland 21 to ensure the normal flow of water inside the second filter element assembly 200.

[0206] In some embodiments of the present invention, Figure 29-Figure 33 As shown, a support structure 205 is provided on the box cover 201, and the support structure 205 abuts against the elastic member pressure cover 21 in the axial direction of the shell 111, so that the elastic member pressure cover 21 can cooperate with the bottom of the shell 111 to jointly limit the second filter box 20 in the axial direction, avoid the second filter box 20 from moving in the axial direction, and thus improve the stability of the second filter box 20.

[0207] In some embodiments of the present invention, Figure 29-Figure 33and Figure 38-Figure 40 As shown, the support structure 205 includes a plurality of support ribs 2051, which are arranged at intervals along the circumference of the box cover 201 and are located on the outer peripheral side of the slow-release hole 204. The plurality of support ribs 2051 are arranged at intervals along the circumference of the box cover 201, so that the force of the box cover 201 can be more uniform, thereby ensuring the stability of the box cover 201, and the plurality of support ribs 2051 can improve the structural strength and rigidity of the box cover 201.

[0208] The supporting ribs 2051 abut against the elastic member gland 21 in the axial direction of the housing 111, so that the elastic member gland 21 can cooperate with the bottom of the housing 111 to jointly limit the second filter material box 20 in the axial direction, thereby preventing the second filter material box 20 from moving in the axial direction, thereby improving the stability of the second filter material box 20. In addition, the supporting ribs 2051 abut against the elastic member gland 21, so that the box cover 201 and the elastic member gland 21 define a certain space in the axial direction, so that the water flow can flow along the surface of the box cover 201, which is convenient for the water flow to flow into the second filter material box 20 through the slow-release hole 204 and for the solution inside the second filter material box 20 to flow out.

[0209] For example, there may be four supporting ribs 2051 , and the four supporting ribs 2051 may be evenly spaced along the circumference of the box cover 201 , so that the force on the box cover 201 is more even, thereby improving the structural strength of the box cover 201 .

[0210] In some embodiments of the present invention, Fig.44 As shown, a mounting groove 121 is formed on the water stop 12, and one end of the elastic member 13 is accommodated in the mounting groove 121. The mounting groove 121 radially limits one end of the elastic member 13 to prevent one end of the elastic member 13 from moving radially relative to the water stop 12, thereby improving the stability of the elastic member 13 and ensuring the effect of the elastic member 13 on the water stop 12. For example, one end of the elastic member 13 can be ground flat so that the contact area between one end of the elastic member 13 and the inner wall of the mounting groove 121 of the water stop 12 is larger, which can increase the friction between one end of the elastic member 13 and the mounting groove 121, thereby further preventing the elastic member 13 from moving in the radial direction and improving the stability of the elastic member 13.

[0211] In some embodiments of the present invention, Figure 29-Figure 33 and Figure 37-Figure 40 As shown, the second filter material box 20 includes a box body 202 and a box cover 201. The box body 202 is open on one side facing the filter element cover 19, and a receiving cavity 203 for receiving the second filter material is formed in the box body 202. The box cover 201 is arranged on the open end of the box body 202 to prevent the second filter material in the receiving cavity 203 from spilling out during use or overall assembly, thereby affecting the overall filtering effect of the second filter element assembly 200 on the water flow.

[0212] When the second filter element assembly 200 needs to be installed as a whole, the second filter material can be first filled into the accommodating cavity 203 of the box body 202 of the second filter element box 20, and then the box cover 201 is placed on the open end of the box body 202 to complete the assembly of the second filter element box 20. Then, the second filter element box 20 is installed as a whole on the shell 111, and the second filter element box 20 is limited and fixed by the limiting structure 23 in the shell 111. Finally, the filter element cover 19 is placed on the shell 111 to complete the assembly of the second filter element assembly 200 as a whole.

[0213] A slow-release hole 204 is formed on the box cover 201, and water is suitable for flowing into or out of the accommodating chamber 203 through the slow-release hole 204. After the water flows into the accommodating chamber 203 through the slow-release hole 204, it contacts the second filter material in the accommodating chamber 203, so that the second filter material in the accommodating chamber 203 is slowly released and dissolved, and the slowly released filter material solution in the accommodating chamber 203 can flow out of the accommodating chamber 203 through the slow-release hole 204 and dissolve in the water outside the accommodating chamber 203, thereby achieving the filtering effect of the second filter element assembly 200 on the water as a whole.

[0214] After water flows into the second filter element 2211 through the water inlet hole 1111 on the filter element cover 19, the water flows into the shell 111, and then can flow through the box cover 201 of the second filter material box 20, and the water flow can flow into the accommodating cavity 203 through the slow-release hole 204, and contact the second filter material in the accommodating cavity 203, so that the second filter material inside the accommodating cavity 203 is slowly released and dissolved, and the slowly released filter material solution can flow out of the accommodating cavity 203 by utilizing the flow of water near the slow-release hole 204, and be released in the water around the slow-release hole 204, thereby optimizing the water flow. Finally, the optimized water flows out of the second filter element 2211 through the water outlet hole 1112 of the filter element cover 19, thereby completing the filtration of the water flow by the second filter element assembly 200.

[0215] In some embodiments of the present invention, Figure 29-Figure 33 and Figure 37-Figure 40 As shown, the filter element cover 19 is detachably covered on the open end of the housing 111, and the box cover 201 is detachably covered on the open end of the box body 202. This arrangement can facilitate the filling or replacement of the filter material in the second filter material box 20, and facilitate the installation and removal of the second filter element assembly 200 as a whole. For example, the filter element cover 19 and the housing 111, as well as the box cover 201 and the box body 202, can be fixedly connected by threaded connection, which has a simple structure, is easy to disassemble, and has a reliable connection.

[0216] In some embodiments of the present invention, Figure 29-Figure 33 and Figure 37-Figure 40As shown, the box cover 201 includes a cover body 2011 and a matching portion 2012, wherein the matching portion 2012 is arranged on one side of the cover body 2011 in the thickness direction, and the matching portion 2012 is accommodated in the box body 202 and abuts against the inner peripheral wall of the box body 202. When the box cover 201 is covered on the box body 202, the matching portion 2012 abuts against the inner peripheral wall of the box body 202, so that the box cover 201 can be relatively fixed to the box body 202 in the radial direction, and the box cover 201 is prevented from moving in the radial direction during use, thereby ensuring the sealing effect of the box cover 201 on the box body 202, and preventing the second filter material in the accommodating cavity 203 from spilling out. At the same time, during installation, the matching portion 2012 can facilitate the positioning of the box cover 201 as a whole, thereby improving the assembly efficiency of the second filter material box 20.

[0217] The cover 2011 covers the open end of the box body 202, and the slow-release hole 204 is formed on the cover 2011. The cover 2011 is used to cover the open end of the box body 202, which can prevent the second filter material in the accommodating cavity 203 from spilling out and affecting the overall filtering effect on the water flow. In the process of the water flow flowing from the water inlet hole 1111 to the water outlet hole 1112, it will flow through the surface of the cover 2011 on the side opposite to the box body 202. The slow-release hole 204 is formed on the cover 2011, which can facilitate the water flow to flow into the accommodating cavity 203, and facilitate the slow-released second filter material solution to flow out of the accommodating cavity 203 by the flow of the water flow, thereby achieving the overall filtering effect on the water flow.

[0218] For example, the matching portion 2012 is formed into a ring shape extending along the circumference of the cover body 2011 , which can better match with the inner circumferential wall of the box body 202 , thereby ensuring the sealing effect of the box cover 201 on the box body 202 .

[0219] In some embodiments of the present invention, Figure 29-Figure 33 As shown, the water inlet hole 1111 is located on the outer peripheral side of the water outlet hole 1112, and the slow-release hole 204 is opposite to the water outlet hole 1112. Water can flow into the second filter element 2211 from the water inlet hole 1111, and after flowing through various structures inside the second filter element assembly 200, it can flow out of the second filter element assembly 200 from the water outlet hole 1112. In this way, when the water flows from the water inlet hole 1111 to the water outlet hole 1112, the slow-release hole 204 can be located on the flow path of the water flow, so that the water flow can flow into the accommodating chamber 203, and the filter solution slowly released can flow out of the accommodating chamber 203 by the flow of the water flow, so as to achieve an overall filtering effect on the water flow. At the same time, the overall structure can be made more compact, and the space utilization rate inside the second filter element assembly 200 can be improved.

[0220] In some embodiments of the present invention, Fig.29As shown, a limiting structure 23 is provided in the housing 111, and the limiting structure 23 is used to limit the second filter material box 20. Therefore, the limiting structure 23 can limit and fix the second filter material box 20, so as to prevent the second filter material box 20 from changing its position during use, thereby improving the structural stability of the second filter material box 20 in the second filter element assembly 200, and ensuring the filtering effect of the second filter material in the second filter material box 20 on the water flow.

[0221] For example, a fourteenth sealing ring 195 is provided at the connection between the filter element cover 19 and the shell 111. The fourteenth sealing ring 195 can seal the connection between the filter element cover 19 and the shell 111 to prevent water flow inside the second filter element assembly 200 from leaking out from the connection between the filter element cover 19 and the shell 111, thereby ensuring the normal use of the second filter element assembly 200.

[0222] The outer wall of the second filter box 20 is spaced apart from the inner wall of the shell 111, so that there is a certain gap between the outer wall of the second filter box 20 and the inner wall of the shell 111, which can facilitate the removal of the second filter box 20 from the shell 111 and the installation of the second filter box 20, thereby improving the overall assembly efficiency.

[0223] In some embodiments of the present invention, Figure 29-Figure 36 As shown, the inner wall of the shell 111 opposite to the open end of the shell 111 is the shell bottom wall, and the limiting structure 23 is arranged on the shell bottom wall, so that the limiting structure 23 can have a better limiting and fixing effect on the second filter box 20, which is convenient for the installation and disassembly of the second filter box 20, and at the same time can make the connection between the limiting structure 23 and the shell 111 more reliable.

[0224] In some embodiments of the present invention, Figure 29-Figure 36 As shown, the limiting structure 23 is located on the outer peripheral side of the second filter box 20 and the limiting structure 23 is suitable for abutting against the outer peripheral wall of the second filter box 20, so that the limiting structure 23 can limit and fix the second filter box 20, improve the structural stability of the second filter box 20 in the second filter element assembly 200, and ensure the filtering effect of the second filter material in the second filter box 20 on the water flow.

[0225] For example, the second filter box 20 and the shell 111 can both be cylindrical structures, and the limiting structure 23 is located on the outer peripheral side of the second filter box 20 and abuts against the outer peripheral wall of the second filter box 20, so that the central axis of the second filter box 20 can coincide with the central axis of the shell 111, thereby improving the stability of the assembly between the second filter box 20 and the shell 111.

[0226] In some embodiments of the present invention, Figure 29-Figure 36As shown, the limiting structure 23 includes a plurality of second limiting convex ribs 231, and the plurality of second limiting convex ribs 231 are arranged at intervals along the circumference of the second filter material box 20. In this way, the plurality of second limiting convex ribs 231 cooperate with each other to jointly complete the limiting and fixing of the second filter material box 20, which can ensure the fixing effect of the limiting structure 23 on the second filter material box 20 as a whole, and at the same time make the force of the second filter material box 20 more uniform, improve the stability of the second filter material box 20 in the second filter element assembly 200, and ensure the overall filtering effect of the second filter element assembly 200.

[0227] For example, the limiting structure 23 may include six second limiting ribs 231, and the six second limiting ribs 231 may be evenly spaced along the circumference of the second filter box 20, so as to better ensure the fixing effect of the limiting structure 23 on the second filter box 20 and improve the stability of the second filter box 20 in the second filter element assembly 200.

[0228] In some embodiments of the present invention, Figure 29-Figure 36 As shown, the second limiting rib 231 has a guide surface 232 and a limiting surface 233, the guide surface 232 is connected to the side of the limiting surface 233 adjacent to the filter element cover 19, and the guide surface 232 extends obliquely from the open end of the housing 111 to the bottom wall of the housing toward the direction of the central axis of the adjacent housing 111. In this way, during the installation of the second filter material box 20 to the housing 111, the guide surface 232 can guide the movement of the second filter material box 20, which can facilitate the rapid positioning of the second filter material box 20 as a whole, and is conducive to the assembly between the limiting structure 23 and the second filter material box 20.

[0229] There is an angle between the limiting surface 233 and the guide surface 232, and the limiting surface 233 is suitable for abutting against the outer peripheral wall of the second filter box 20. The limiting surfaces 233 of multiple second limiting ribs 231 all abut against the outer peripheral wall of the second filter box 20, so that the limiting structure 23 can limit and fix the second filter box 20, thereby improving the structural stability of the second filter box 20 in the second filter element assembly 200.

[0230] In some embodiments of the present invention, Figure 29-Figure 36 As shown, the outer peripheral wall of the second filter material box 20 includes a guide wall 2021, which is located at the lower part of the second filter material box 20 and is connected to the bottom wall of the second filter material box 20. The guide wall 2021 extends obliquely in the direction from the open end of the housing 111 to the bottom wall of the housing toward the direction of the central axis of the adjacent second filter material box 20. During the installation of the second filter material box 20 to the housing 111, the guide wall 2021 cooperates with the guide surface 232 to guide the movement of the second filter material box 20, ensuring that the second filter material box 20 moves along the oblique extension direction of the guide surface 232, so that the movement of the second filter material box 20 during the installation process is more stable.

[0231] In some embodiments of the present invention, Figure 29-Figure 3 As shown, the limiting structure 23 and the shell 111 are integrally formed, which can improve the structural strength and rigidity of the connection between the limiting structure 23 and the shell 111, make the connection between the limiting structure 23 and the shell 111 more reliable, and facilitate the installation and disassembly between the shell 111 and the second filter box 20, thereby improving the overall assembly efficiency of the second filter element assembly 200.

[0232] In some embodiments of the present invention, Figure 29-Figure 38 As shown, the bottom surface of the second filter material box 20 is formed with a plurality of second supporting ribs 2022 arranged at intervals along the circumference of the second filter material box 20, and the second supporting ribs 2022 are supported on the bottom wall of the shell. The second supporting ribs 2022 can support the second filter material box 20, support the second filter material box 20 on the bottom wall of the shell, and at the same time, the second supporting ribs 2022 can improve the structural strength and rigidity of the second filter material box 20. Compared with the bottom surface of the second filter material box 20 directly supported on the bottom wall of the shell, the second supporting ribs 2022 can ensure the flatness of the bottom surface of the second filter material box 20, avoid the second filter material box 20 from tilting as a whole, and improve the stability of the overall structure.

[0233] For example, the second supporting rib 2022 can be integrally formed with the second filter box 20, which can improve the overall structural strength and rigidity of the second filter box 20, make the connection between the second supporting rib 2022 and the second filter box 20 more reliable, and facilitate the installation and disassembly of the second filter box 20 as a whole.

[0234] In some embodiments of the present invention, Figure 29-Figure 38 As shown, there are three second supporting ribs 2022, which are arranged in a triangle, and can better ensure the flatness of the bottom surface of the second filter box 20, improve the stability of the overall structure, and the three second supporting ribs 2022 are arranged in a triangle, which can make the force on the second filter box 20 more uniform, and better ensure the stability of the second filter box 20.

[0235] It should be noted that when the above-mentioned filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111, and when the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011. One of the first, second and third embodiments and one of the first and second embodiments of the first filter element 17 of the first filter element assembly 100 can be arbitrarily combined to form the first filter element assembly 100.

[0236] For example:

[0237] [First filter element assembly 100 of the first embodiment]

[0238] like Figure 8-Figure 11 As shown, the first filter element assembly 100 includes a filter element mounting seat 10 and a first filter element 17 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 includes a mounting seat body 101 and a push rod 102, the mounting seat body 101 is formed with a water inlet interface 1011 and a water outlet interface 1012, the mounting seat body 101 is detachably connected to the filter element 11, one end of the push rod 102 is connected to the mounting seat body 101, the first filter element 17 includes a housing 111, a water stop 12 and an elastic member 13, the housing 111 has a water inlet interface 1011 and a water outlet interface 1012. Hole 1111 and water outlet hole 1112, water outlet hole 1112 and water outlet interface 1012 are connected, the water stop member 12 is arranged in the shell body 111 and is located at the water inlet hole 1111, the elastic member 13 is arranged on the side of the water stop member 12 away from the water inlet hole 1111, when the first filter element 17 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is abutted against the water stop member 12, and the other end of the push rod 102 passes through the water inlet hole 1111 and extends into the shell body 111 to push the water stop member 12 to open the water inlet hole 1111.

[0239] The first filter element 17 also includes a center tube 171 and a filter material cover 172. The center tube 171 is arranged in the shell 111. A first water passage 1711 is formed on the center tube 171 and radially penetrates the center tube 171. The filter material cover 172 is arranged in the shell 111 and connected to the center tube 171. The filter material cover 172 is located on the side of the center tube 171 facing the water inlet 1111, wherein the filter material cover 172 and the outer wall surface of the center tube 171 and the inner wall surface of the shell 111 cooperate to define a filter material cavity 173 for filling the first filter material, and the inner side of the center tube 171 defines a first water outlet channel, the filter material cavity 173 is connected to the water inlet 1111, the first water outlet channel is connected to the water outlet hole 1112 of the shell 111, and the first water outlet channel and the filter material cavity 173 are connected through the first water passage 1711.

[0240] [First filter element assembly 100 of the second embodiment]

[0241] like Figure 16-Figure 19As shown, the first filter element assembly 100 includes a filter element mounting seat 10 and a first filter element 17 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the first filter element 17 includes a housing 111, a water stop member 12, a push rod 16 and an elastic member 13, the housing 111 has a water inlet hole 1111 and a water outlet hole 1112, the water outlet hole 1112 is connected to the water outlet interface 1012, the water stop member 12 is arranged in the housing 111 and is located at the water inlet hole 1111, and the elastic member 13 It is arranged on the side of the water stop member 12 away from the water inlet hole 1111. When the first filter element 17 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12. The push rod 16 is penetrated into the water inlet hole 1111 and cooperates with the clearance of the peripheral wall of the water inlet hole 1111. One end of the push rod 16 is fixed to the water stop member 12 and the other end extends out of the housing 111. When the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 is in contact with the push rod 16 and pushes the water stop member 12 through the push rod 16 to open the water inlet hole 1111.

[0242] The first filter element 17 also includes a center tube 171 and a filter material cover 172. The center tube 171 is arranged in the shell 111. A first water passage 1711 is formed on the center tube 171 and radially penetrates the center tube 171. The filter material cover 172 is arranged in the shell 111 and connected to the center tube 171. The filter material cover 172 is located on the side of the center tube 171 facing the water inlet 1111, wherein the filter material cover 172 and the outer wall surface of the center tube 171 and the inner wall surface of the shell 111 cooperate to define a filter material cavity 173 for filling the first filter material, and the inner side of the center tube 171 defines a first water outlet channel, the filter material cavity 173 is connected to the water inlet 1111, the first water outlet channel is connected to the water outlet hole 1112 of the shell 111, and the first water outlet channel and the filter material cavity 173 are connected through the first water passage 1711.

[0243] [First filter element assembly 100 of the third embodiment]

[0244] The first filter element assembly 100 includes a filter element mounting seat 10 and a first filter element 17 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the first filter element 17 includes a shell 111, a water stop member 12 and an elastic member 13, the shell 111 has a water inlet hole 1111 and a water outlet hole 1112, the water outlet hole 1112 is connected to the water outlet interface 1012, the water stop member 12 is arranged in the shell 111 and is located at the water inlet hole 1111, the elastic member 13 is arranged on the side of the water stop member 12 away from the water inlet hole 1111, when the first filter element 17 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12 to push the water stop member 12 to close the water inlet hole 1111.

[0245] The first filter element 17 also includes a first filter material box 18. The first filter material box 18 is arranged in the housing 111, and includes a filter material box upper cover 181 and a filter material box lower shell 182. The side of the filter material box upper cover 181 away from the water inlet hole 1111 has an annular filter screen 1811 extending along the circumferential direction of the filter material box upper cover 181. The end of the filter material box lower shell 182 close to the water inlet hole 1111 extends into the filter material box upper cover 181. The filter material box lower shell 182 is used to accommodate the first filter material. The outer peripheral wall of the filter box upper cover 181 and the shell body 111 jointly define a first water inlet channel 1812, and a second water outlet channel 1821 is defined in the filter box lower shell 182. The peripheral wall of the filter box lower shell 182 has a water opening 1822 for connecting the first water inlet channel 1812 and the second water outlet channel 1821, and the filter box upper cover 181 has a connecting opening 1813 for connecting the second water outlet channel 1821 and the water outlet hole 1112.

[0246] [First filter element assembly 100 of the fourth embodiment]

[0247] like Fig. 22 , Fig.25 and Fig.26 As shown, the first filter element assembly 100 includes a filter element mounting seat 10 and a first filter element 17 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 includes a mounting seat body 101 and a push rod 102, the mounting seat body 101 is formed with a water inlet interface 1011 and a water outlet interface 1012, the mounting seat body 101 is detachably connected to the filter element 11, one end of the push rod 102 is connected to the mounting seat body 101, the first filter element 17 includes a housing 111, a water stop 12 and an elastic member 13, the housing 111 has a water inlet interface 1011 and a water outlet interface 1012. Hole 1111 and water outlet hole 1112, water outlet hole 1112 and water outlet interface 1012 are connected, the water stop member 12 is arranged in the shell body 111 and is located at the water inlet hole 1111, the elastic member 13 is arranged on the side of the water stop member 12 away from the water inlet hole 1111, when the first filter element 17 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is abutted against the water stop member 12, and the other end of the push rod 102 passes through the water inlet hole 1111 and extends into the shell body 111 to push the water stop member 12 to open the water inlet hole 1111.

[0248] The first filter element 17 also includes a first filter material box 18. The first filter material box 18 is arranged in the housing 111, and includes a filter material box upper cover 181 and a filter material box lower shell 182. The side of the filter material box upper cover 181 away from the water inlet hole 1111 has an annular filter screen 1811 extending along the circumferential direction of the filter material box upper cover 181. The end of the filter material box lower shell 182 close to the water inlet hole 1111 extends into the filter material box upper cover 181. The filter material box lower shell 182 is used to accommodate the first filter material. The outer peripheral wall of the filter box upper cover 181 and the shell body 111 jointly define a first water inlet channel 1812, and a second water outlet channel 1821 is defined in the filter box lower shell 182. The peripheral wall of the filter box lower shell 182 has a water opening 1822 for connecting the first water inlet channel 1812 and the second water outlet channel 1821, and the filter box upper cover 181 has a connecting opening 1813 for connecting the second water outlet channel 1821 and the water outlet hole 1112.

[0249] [First filter element assembly 100 of the fifth embodiment]

[0250] like Fig.23 As shown, the first filter element assembly 100 includes a filter element mounting seat 10 and a first filter element 17 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the first filter element 17 includes a housing 111, a water stop member 12, a push rod 16 and an elastic member 13, the housing 111 has a water inlet hole 1111 and a water outlet hole 1112, the water outlet hole 1112 is connected to the water outlet interface 1012, the water stop member 12 is arranged in the housing 111 and is located at the water inlet hole 1111, and the elastic member 13 It is arranged on the side of the water stop member 12 away from the water inlet hole 1111. When the first filter element 17 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12. The push rod 16 is penetrated into the water inlet hole 1111 and cooperates with the clearance of the peripheral wall of the water inlet hole 1111. One end of the push rod 16 is fixed to the water stop member 12 and the other end extends out of the housing 111. When the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 is in contact with the push rod 16 and pushes the water stop member 12 through the push rod 16 to open the water inlet hole 1111.

[0251] The first filter element 17 also includes a first filter material box 18. The first filter material box 18 is arranged in the housing 111, and includes a filter material box upper cover 181 and a filter material box lower shell 182. The side of the filter material box upper cover 181 away from the water inlet hole 1111 has an annular filter screen 1811 extending along the circumferential direction of the filter material box upper cover 181. The end of the filter material box lower shell 182 close to the water inlet hole 1111 extends into the filter material box upper cover 181. The filter material box lower shell 182 is used to accommodate the first filter material. The outer peripheral wall of the filter box upper cover 181 and the shell body 111 jointly define a first water inlet channel 1812, and a second water outlet channel 1821 is defined in the filter box lower shell 182. The peripheral wall of the filter box lower shell 182 has a water opening 1822 for connecting the first water inlet channel 1812 and the second water outlet channel 1821, and the filter box upper cover 181 has a connecting opening 1813 for connecting the second water outlet channel 1821 and the water outlet hole 1112.

[0252] [First filter element assembly 100 of the sixth embodiment]

[0253] The first filter element assembly 100 includes a filter element mounting seat 10 and a first filter element 17 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the first filter element 17 includes a shell 111, a water stop member 12 and an elastic member 13, the shell 111 has a water inlet hole 1111 and a water outlet hole 1112, the water outlet hole 1112 is connected to the water outlet interface 1012, the water stop member 12 is arranged in the shell 111 and is located at the water inlet hole 1111, the elastic member 13 is arranged on the side of the water stop member 12 away from the water inlet hole 1111, when the first filter element 17 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12 to push the water stop member 12 to close the water inlet hole 1111.

[0254] The first filter element 17 also includes a center tube 171 and a filter material cover 172. The center tube 171 is arranged in the shell 111. A first water passage 1711 is formed on the center tube 171 and radially penetrates the center tube 171. The filter material cover 172 is arranged in the shell 111 and connected to the center tube 171. The filter material cover 172 is located on the side of the center tube 171 facing the water inlet 1111, wherein the filter material cover 172 and the outer wall surface of the center tube 171 and the inner wall surface of the shell 111 cooperate to define a filter material cavity 173 for filling the first filter material, and the inner side of the center tube 171 defines a first water outlet channel, the filter material cavity 173 is connected to the water inlet 1111, the first water outlet channel is connected to the water outlet hole 1112 of the shell 111, and the first water outlet channel and the filter material cavity 173 are connected through the first water passage 1711.

[0255] When the above-mentioned filter element 11 is separated from the filter element mounting seat 10, the water stop member 12 blocks the water inlet hole 1111. When the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 pushes the water stop member 12 to open the water inlet hole 1111, so that the water inlet hole 1111 is connected to the water inlet interface 1011. One of the first, second and third embodiments and the second filter element 2211 of the second filter element assembly 200 can be arbitrarily combined to form the second filter element assembly 200.

[0256] For example:

[0257] [Second filter element assembly 200 of the first embodiment]

[0258] like Fig.29 , Fig.30 and Fig.49 As shown, the second filter element assembly 200 includes a filter element mounting seat 10 and a second filter element 22 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 includes a mounting seat body 101 and a push rod 102, the mounting seat body 101 is formed with a water inlet interface 1011 and a water outlet interface 1012, the mounting seat body 101 is detachably connected to the filter element 11, one end of the push rod 102 is connected to the mounting seat body 101, the second filter element 22 includes a housing 111, a water stop 12 and an elastic member 13, the housing 111 has a water inlet interface 1011 and a water outlet interface 1012. Hole 1111 and water outlet hole 1112, water outlet hole 1112 and water outlet interface 1012 are connected, the water stop member 12 is arranged in the shell body 111 and is located at the water inlet hole 1111, the elastic member 13 is arranged on the side of the water stop member 12 away from the water inlet hole 1111, when the second filter element 22 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is abutted against the water stop member 12, and the other end of the push rod 102 passes through the water inlet hole 1111 and extends into the shell body 111 to push the water stop member 12 to open the water inlet hole 1111.

[0259] The second filter element 2211 further includes a filter element cover 19 and a second filter material box 20. The filter element cover 19 is disposed on the open end of the housing 111 and is formed with a water inlet hole 1111 and a water outlet hole 1112. The second filter material box 20 is disposed in the housing 111. The second filter material box 20 has a receiving cavity 203 for receiving the second filter material. The receiving cavity 203 is suitable for communicating with the water inlet hole 1111 and the water outlet hole 1112. The second filter material box 20 is formed with a slow-release hole 204, and water is suitable for flowing into or out of the receiving cavity 203 through the slow-release hole 204.

[0260] [Second filter element assembly 200 of the second embodiment]

[0261] like Fig.31 , Fig.32 and Fig.52As shown, the second filter element assembly 200 includes a filter element mounting seat 10 and a second filter element 22 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the second filter element 22 includes a housing 111, a water stop member 12, a push rod 16 and an elastic member 13, the housing 111 has a water inlet hole 1111 and a water outlet hole 1112, the water outlet hole 1112 is connected to the water outlet interface 1012, the water stop member 12 is arranged in the housing 111 and is located at the water inlet hole 1111, and the elastic member 13 It is arranged on the side of the water stop member 12 away from the water inlet hole 1111. When the second filter element 22 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12. The push rod 16 is penetrated into the water inlet hole 1111 and cooperates with the clearance of the peripheral wall of the water inlet hole 1111. One end of the push rod 16 is fixed to the water stop member 12 and the other end extends out of the housing 111. When the filter element 11 is connected to the filter element mounting seat 10, the filter element mounting seat 10 is in contact with the push rod 16 and pushes the water stop member 12 through the push rod 16 to open the water inlet hole 1111.

[0262] The second filter element 2211 further includes a filter element cover 19 and a second filter material box 20. The filter element cover 19 is disposed on the open end of the housing 111 and is formed with a water inlet hole 1111 and a water outlet hole 1112. The second filter material box 20 is disposed in the housing 111. The second filter material box 20 has a receiving cavity 203 for receiving the second filter material. The receiving cavity 203 is suitable for communicating with the water inlet hole 1111 and the water outlet hole 1112. The second filter material box 20 is formed with a slow-release hole 204, and water is suitable for flowing into or out of the receiving cavity 203 through the slow-release hole 204.

[0263] [Second filter element assembly 200 of the third embodiment]

[0264] like Fig.46 As shown, the second filter element assembly 200 includes a filter element mounting seat 10 and a second filter element 22 detachably connected to the filter element mounting seat 10, the filter element mounting seat 10 has a water inlet interface 1011 and a water outlet interface 1012, the second filter element 22 includes a shell 111, a water stop member 12 and an elastic member 13, the shell 111 has a water inlet hole 1111 and a water outlet hole 1112, the water outlet hole 1112 and the water outlet interface 1012 are connected, the water stop member 12 is arranged in the shell 111 and is located at the water inlet hole 1111, the elastic member 13 is arranged on the side of the water stop member 12 away from the water inlet hole 1111, when the second filter element 22 is separated from the filter element mounting seat 10, one end of the elastic member 13 is fixed and the other end is in contact with the water stop member 12 to push the water stop member 12 to close the water inlet hole 1111.

[0265] The second filter element 2211 further includes a filter element cover 19 and a second filter material box 20. The filter element cover 19 is disposed on the open end of the housing 111 and is formed with a water inlet hole 1111 and a water outlet hole 1112. The second filter material box 20 is disposed in the housing 111. The second filter material box 20 has a receiving cavity 203 for receiving the second filter material. The receiving cavity 203 is suitable for communicating with the water inlet hole 1111 and the water outlet hole 1112. The second filter material box 20 is formed with a slow-release hole 204, and water is suitable for flowing into or out of the receiving cavity 203 through the slow-release hole 204.

[0266] It should be noted that a valve assembly 103 may be provided in the filter element mounting seat 10 , and the valve assembly 103 may have an on state and a cut-off state, so as to further prevent the water stored in the filter element 11 from leaking out after the filter element 11 is separated from the filter element mounting seat 10 .

[0267] In some embodiments of the present invention, Figure 44-Figure 55 As shown, a valve assembly 103 is provided in the filter element mounting seat 10, and the valve assembly 103 has a conducting state and a blocking state. The valve assembly 103 can control the connection and isolation of the waterway between the filter element mounting seat 10 and the filter element 11 according to the assembly state between the filter element mounting seat 10 and the filter element 11, thereby avoiding waste of water resources.

[0268] After the filter element 11 is assembled with the filter element mounting seat 10, the valve assembly 103 is in a conducting state, the water inlet hole 1111 is connected with the water inlet interface 1011, and the water outlet hole 1112 is connected with the water outlet interface 1012. Therefore, after the filter element 11 is assembled with the filter element mounting seat 10, the valve assembly 103 is in a conducting state, and the water flow can flow into the filter element mounting seat 10 from the water inlet interface 1011 of the filter element mounting seat 10, and then flow through the valve assembly 103 of the filter element mounting seat 10 into the water inlet hole 1111 of the filter element 11, and after flowing inside the filter element 11, flow out of the filter element 11 through the water outlet hole 1112 of the filter element 11, and then flow into the filter element mounting seat 10 through the valve assembly 103, and finally flow out from the water outlet interface 1012 of the filter element mounting seat 10, thereby achieving the filtering effect of the first filter element assembly 100 and the second filter element assembly 200 on the water flow.

[0269] After the filter element 11 is separated from the filter element mounting seat 10, the valve assembly 103 is in a cut-off state, the water inlet hole 1111 is cut off from the water inlet interface 1011, and the water outlet hole 1112 is cut off from the water outlet interface 1012. Therefore, after the filter element 11 is separated from the filter element mounting seat 10, the valve assembly 103 is in a cut-off state, and the water path in the filter element mounting seat 10 cannot be connected with the water path in the filter element 11, thereby preventing the water flow in the filter element mounting seat 10 from flowing out when replacing or repairing the filter element 11, avoiding the waste of water resources, and facilitating the installation and removal of the filter element 11 as a whole.

[0270] In some embodiments of the present invention, Fig.45 , Fig.48 and Fig.51 As shown, when the filter element 11 is assembled with the filter element mounting seat 10, the filter element 11 contacts and cooperates with the valve assembly 103, so that the valve assembly 103 switches from the cut-off state to the on state, and the water path between the filter element mounting seat 10 and the filter element 11 is connected. Water can flow into the filter element mounting seat 10 from the water inlet interface 1011 of the filter element mounting seat 10, and then flow through the valve assembly 103 of the filter element mounting seat 10 into the water inlet hole 1111 of the filter element 11, and after flowing inside the filter element 11, it flows out of the filter element 11 through the water outlet hole 1112 of the filter element 11, and then flows into the filter element mounting seat 10 through the valve assembly 103, and finally flows out from the water outlet interface 1012 of the filter element mounting seat 10. For example, when the filter element 11 is separated from the filter element mounting seat 10, the filter element 11 is out of contact with the valve assembly 103, so that the valve assembly 103 is switched from the on state to the off state, and the water path between the filter element mounting seat 10 and the filter element 11 is cut off.

[0271] Therefore, the automatic conversion between the on state and the off state of the valve assembly 103 can be realized through the matching state of the filter element 11 and the valve assembly 103, thereby realizing the automatic opening and closing of the water path between the filter element mounting seat 10 and the filter element 11, which is convenient to use.

[0272] In some embodiments of the present invention, Figure 44-Figure 55 As shown, in the on state, the water inlet interface 1011 is isolated from the water outlet interface 1012, and in the off state, the water inlet interface 1011 is connected to the water outlet interface 1012. With this arrangement, when the valve assembly 103 is in the on state, it is possible to avoid the phenomenon that water flows into the filter element mounting seat 10 through the water inlet interface 1011 and then directly flows out of the filter element mounting seat 10 through the water outlet interface 1012, thereby ensuring that the water flowing out of the water outlet interface 1012 of the filter element mounting seat 10 is the water flowing through the filter element 11, thereby ensuring the filtering effect of the first filter element assembly 100 and the second filter element assembly 200 on the water flow.

[0273] When the valve assembly 103 is in the cut-off state, the water inlet interface 1011 is connected to the water outlet interface 1012, so that water can flow into the filter element mounting seat 10 through the water inlet interface 1011 and then directly flow out through the water outlet interface 1012, thereby ensuring the normal flow of water in the waterway connected to the filter element mounting seat 10 when the filter element 11 is removed.

[0274] In some embodiments of the present invention, Figure 44-Figure 55As shown, the filter element mounting seat 10 is formed with a first mounting cavity 104, a second mounting cavity 105 and a connecting cavity 106, the first mounting cavity 104 and the second mounting cavity 105 are separated from each other, the valve assembly 103 includes a first stop valve 1031 and a second stop valve 1032, the first mounting cavity 104 is provided with a first stop valve 1031, the first stop valve 1031 includes a first valve seat 10131 and a first valve core 10132, a first connecting channel 1033 connected to the water inlet interface 1011 is formed in the first valve seat 10131, and the first valve core 10132 is movably arranged in the first connecting channel 1033 between a first position and a second position. The first valve core 10132 of the first stop valve 1031 can be used to control the connection and isolation between the water inlet interface 1011 and the water inlet hole 1111. When the first valve core 10132 is in the first position, the water path between the water inlet interface 1011 and the water inlet hole 1111 is connected, and water can enter the first communication channel 1033 through the water inlet interface 1011, and after flowing through the first communication channel 1033, it flows into the filter element 11 through the water inlet hole 1111. When the first valve core 10132 is in the second position, the water path between the water inlet interface 1011 and the water inlet hole 1111 is blocked, and the water inlet interface 1011 is connected to the communication chamber 106.

[0275] A second stop valve 1032 is provided in the second installation cavity 105. The second stop valve 1032 includes a second valve seat 10321 and a second valve core 10322. A second communication channel 1034 communicating with the water outlet interface 1012 is formed in the second valve seat 10321. The second valve core 10322 is movably provided in the second communication channel 1034 between the third position and the fourth position. The second valve core 10322 of the second stop valve 1032 can be used to control the communication and isolation between the water outlet interface 1012 and the water outlet hole 1112. When the second valve core 10322 is in the third position, the water path between the water outlet interface 1012 and the water outlet hole 1112 is connected, and the water flow in the filter element 11 can flow into the second communication channel 1034 through the water outlet hole 1112, and after flowing through the second communication channel 1034, it flows out of the filter element installation seat 10 through the water outlet interface 1012. When the second valve core 10322 is in the fourth position, the water path between the water outlet interface 1012 and the water outlet hole 1112 is blocked, and the water inlet interface 1011 is connected to the communication cavity 106 .

[0276] Among them, when the valve assembly 103 is in the conducting state, the first valve core 10132 is in the first position and the second valve core 10322 is in the third position, the first connecting channel 1033 connects the water inlet interface 1011 and the water inlet hole 1111, the second connecting channel 1034 connects the water outlet interface 1012 and the water outlet hole 1112, and the first connecting channel 1033 and the second connecting channel 1034 are both separated from the connecting cavity 106, which can ensure that the water flowing out of the water outlet interface 1012 of the filter element mounting seat 10 is the water flowing through the filter element 11, thereby ensuring the filtering effect of the first filter element assembly 100 and the second filter element assembly 200 on the water flow.

[0277] Therefore, after the filter element 11 is assembled with the filter element mounting seat 10, the valve assembly 103 is in a conducting state, and the external water flow can flow into the first connecting channel 1033 from the water inlet interface 1011 of the filter element mounting seat 10, and after flowing through the first connecting channel 1033, it flows into the water inlet hole 1111 of the filter element 11, and after flowing inside the filter element 11, it flows out of the filter element 11 through the water outlet hole 1112 of the filter element 11 and flows into the second connecting channel 1034, and after flowing through the second connecting channel 1034, it flows out from the water outlet interface 1012 of the filter element mounting seat 10, thereby realizing the filtering effect of the first filter element assembly 100 and the second filter element assembly 200 on the water flow.

[0278] When the valve assembly 103 is in the cut-off state, the first valve core 10132 is in the second position and the second valve core 10322 is in the fourth position, the first connecting channel 1033 is separated from the water inlet hole 1111, and the second connecting channel 1034 is separated from the water outlet hole 1112. The first connecting channel 1033 and the second connecting channel 1034 are connected through the connecting cavity 106, so that water can flow into the filter element mounting seat 10 through the water inlet interface 1011, and then flow through the first connecting channel 1033, the connecting cavity 106, and the second connecting channel 1034 in turn, and then flow out of the filter element mounting seat 10 through the water outlet interface 1012, so that when the filter element 11 is removed, the normal flow of water in the waterway connected to the filter element mounting seat 10 is guaranteed.

[0279] Therefore, after the filter element 11 is separated from the filter element mounting seat 10, the valve assembly 103 is in a cut-off state, and the external water flow can flow into the first connecting channel 1033 from the water inlet interface 1011 of the filter element mounting seat 10, and flow into the connecting cavity 106 through the first connecting channel 1033. The water flow in the connecting cavity 106 flows into the second connecting channel 1034, and after flowing through the second connecting channel 1034, it flows out from the water outlet interface 1012 of the filter element mounting seat 10.

[0280] For example, the first stop valve 1031 may include a first spring 10133, one end of the first spring 10133 is connected to the first valve core 10132, and the other end of the first spring 10133 is connected to the first valve seat 10131. After the filter element 11 is separated from the filter element mounting seat 10, the first spring 10133 can switch the first valve core 10132 from the first position to the second position by the elastic force acting on the first valve core 10132; after the filter element 11 is assembled with the filter element mounting seat 10, the filter element 11 contacts and cooperates with the first valve core 10132, so that the first valve core 10132 overcomes the elastic force of the first spring 10133 and switches from the second position to the first position.

[0281] The second stop valve 1032 may include a second spring 10323, one end of the second spring 10323 is connected to the second valve core 10322, and the other end of the second spring 10323 is connected to the second valve seat 10321. After the filter element 11 is separated from the filter element mounting seat 10, the second spring 10323 can switch the second valve core 10322 from the third position to the fourth position by the elastic force on the second valve core 10322; after the filter element 11 is assembled with the filter element mounting seat 10, the filter element 11 contacts and cooperates with the second valve core 10322, so that the second valve core 10322 overcomes the elastic force of the second spring 10323 and switches from the fourth position to the third position.

[0282] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 representation of the above terms does 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.

[0283] 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: shell; An inner liner, the inner liner is arranged in the outer shell, and the inner liner is connected with a water inlet pipe and a water outlet pipe; A first filter element assembly, wherein the first filter element assembly is serially connected to the water inlet pipe; a second filter element assembly, the second filter element assembly being serially connected to the water outlet pipe; At least one of the first filter element assembly and the second filter element assembly is arranged in the shell, or the first filter element assembly and the second filter element assembly are both arranged outside the shell, the first filter element assembly and the second filter element assembly both include 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 and a water outlet interface, the filter element includes a shell, the shell has a water inlet hole and a water outlet hole, at least one of the first filter element assembly and the second filter element assembly includes a water stop member, the water outlet hole is connected to the water outlet interface, 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: Also includes: A water mixing valve and a connecting pipe, wherein the water 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 water mixing valve.

3. The water heater according to claim 2, characterized in that: The one end of the connecting tube is connected between the inner tank and the first filter element assembly, or the one end of the connecting tube is connected upstream of the first filter element assembly in the direction of water flow.

4. The water heater according to claim 3, characterized in that: The water mixing valve is located upstream of the second filter element assembly in the direction of water flow, or the water mixing valve is located downstream of the second filter element assembly in the direction of water flow.

5. The water heater according to claim 1, characterized in that: The filter element of the first filter element assembly is a first filter element, the first filter element includes a first filter material, the first filter material is arranged in the shell, and the first filter material is an adsorptive filter material, a replacement ion filter material or an anti-ion agglomeration filter material.

6. The water heater according to claim 5, characterized in that: The first filter material is a sheet-like filter material, a granular filter material or a cotton-like filter material.

7. The water heater according to claim 1, characterized in that: The filter element of the second filter element assembly is a second filter element. The second filter element includes a second filter material. The second filter material is arranged in the housing. The second filter material is a slow-release filter material.

8. The water heater according to any one of claims 1 to 7, 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.

9. The water heater according to claim 8, 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.

10. The water heater according to claim 8, 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.

11. The water heater according to claim 10, characterized in that A first supporting rib is formed on the inner wall surface of the shell, and the first supporting rib extends in a ring shape along the circumference of the shell. The positioning member is arranged on the side of the first supporting rib facing the water stop member, and the outer peripheral edge of the positioning member is supported on the first supporting rib.

12. The water heater according to claim 8, 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 and the water outlet 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.

13. The water heater according to claim 12, characterized in that The mounting seat body and the ejector rod are integrally formed.

14. The water heater according to claim 12, characterized in that The filter element is rotatably connected to the filter element mounting seat, and the water inlet hole is an arc-shaped hole extending along the circumference of the shell.

15. The water heater according to claim 8, characterized in that The filter element also includes: a push rod, which is inserted into the water inlet hole and cooperates with the clearance of the peripheral wall of the water inlet hole, one end of the push rod is fixed to the water stop member and the other end extends out of the shell, when the filter element is connected to the filter element mounting seat, the filter element mounting seat abuts against the push rod and pushes the water stop member through the push rod to open the water inlet hole.

16. The water heater according to claim 15, characterized in that The water inlet hole includes a first hole segment and a second hole segment, the first hole segment is located on a side of the second hole segment facing the water inlet interface, and the hole diameter of the first hole segment is smaller than the hole diameter of the second hole segment. A limiting boss is provided at one end of the push rod connected to the water stop member, the cross-sectional dimension of the limiting boss is larger than the cross-sectional dimension of the first hole section, and when the water stop member blocks the water inlet hole, the limiting boss fits into the second hole section.

17. 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.

18. The water heater according to claim 17, 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.

19. The water heater according to claim 17, 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.

20. The water heater according to any one of claims 1 to 7, characterized in that: The filter element of the first filter element assembly is a first filter element, and the first filter element further comprises: A central tube, the central tube being disposed in the shell, and having a first water hole formed thereon that penetrates 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 first water outlet channel, the filter material cavity is connected with the water inlet hole, the first water outlet channel is connected with the water outlet hole of the shell, and the first water outlet channel and the filter material cavity are connected through the first water hole.

21. The water heater according to claim 20, characterized in that A plurality of first limiting ribs are arranged on the bottom wall of the shell, and the plurality of first limiting ribs are arranged at intervals around the central tube. 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 first limiting ribs.

22. The water heater according to claim 21, 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 in 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.

23. The water heater according to claim 20, 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 first water outlet channel through the intermediate channel.

24. The water heater according to any one of claims 1 to 7, characterized in that: The filter element of the first filter element assembly is a first filter element, and the first filter element further comprises: The first filter material box, the first filter material box is arranged in the shell, the first filter material box includes a filter material box upper cover and a filter material box lower shell, the side of the filter material box upper cover facing away from the water inlet hole has an annular filter screen extending along the circumferential direction of the filter material box upper cover, one end of the filter material box lower shell close to the water inlet hole extends into the filter material box upper cover, the filter material box lower shell is used to accommodate the second filter material, the outer peripheral wall of the filter material box upper cover and the shell together define a first water inlet channel, the second water outlet channel is defined in the filter material box lower shell, the peripheral wall of the filter material box lower shell has a water opening for connecting the first water inlet channel and the second water outlet channel, and the filter material box upper cover has a connecting port for connecting the second water outlet channel and the water outlet hole.

25. The water heater according to claim 24, characterized in that One end of the shell body provided with the water outlet has an inwardly extending extension piece, and the extension piece has a connecting channel in it, and the connecting channel is connected with the communication port and the water outlet.

26. The water heater according to claim 25, characterized in that One end of the filter box upper cover facing the water inlet hole is provided with a protrusion, the communication port passes through the protrusion, and one end of the extension piece is sleeved outside the protrusion.

27. The water heater according to claim 24, characterized in that The outer peripheral wall of the filter box lower shell is provided with limiting ribs extending along the circumferential direction of the filter box lower shell, and one end of the filter box upper cover away from the water inlet hole is supported on the limiting ribs.

28. The water heater according to claim 24, characterized in that The inner peripheral wall of the shell at one end away from the water inlet hole is provided with fixing ribs, and the fixing ribs are multiple and spaced apart along the circumferential direction of the shell, and the first filter material box is located in the space defined by the multiple fixing ribs.

29. The water heater according to any one of claims 1 to 7, characterized in that: The filter element of the second filter element assembly is a second filter element, and the second filter element further includes: A filter element cover, the filter element cover is arranged at the open end of the housing and is formed with the water inlet and the water outlet; The second filter material box is arranged in the shell, and the second filter material box has a accommodating cavity for accommodating the second filter material. The accommodating cavity is suitable for communicating with the water inlet and the water outlet. A slow-release hole is formed on the second filter material box, and water is suitable for flowing into or out of the accommodating cavity through the slow-release hole.

30. The water heater assembly of claim 29, wherein: The second filter material box comprises a box body and a box cover. The box body is open at one side facing the filter element cover. The box cover is arranged at the open end of the box body. The slow-release hole is formed on the box cover.

31. The water heater assembly of claim 30, wherein: The box cover includes a cover body and a matching portion, wherein the matching portion is arranged on one side of the cover body in the thickness direction, the matching portion is accommodated in the box body and abuts against the inner peripheral wall of the box body, the cover body covers the open end of the box body, and the slow-release hole is formed on the cover body.

32. The water heater according to claim 29, characterized in that A limiting structure is provided in the shell, and the limiting structure is used to limit the second filter material box.

33. The water heater according to claim 32, characterized in that The inner wall of the shell opposite to the open end of the shell is the shell bottom wall, and the limiting structure is arranged on the shell bottom wall. The limiting structure is located on the outer peripheral side of the second filter box and is suitable for abutting against the outer peripheral wall of the second filter box.

34. The water heater according to claim 33, characterized in that The limiting structure includes a plurality of second limiting ribs, which are arranged at intervals along the circumference of the second filter box, and the second limiting ribs have a guide surface and a limiting surface, the guide surface is connected to the side of the limiting surface adjacent to the filter element cover, and the guide surface extends obliquely in the direction from the open end of the shell to the bottom wall of the shell toward the direction adjacent to the central axis of the shell, and an angle is formed between the limiting surface and the guide surface, and the limiting surface is suitable for abutting against the outer peripheral wall of the second filter box.

35. The water heater according to claim 34, characterized in that The outer peripheral wall of the second filter box includes a guide wall, which is located at the lower part of the second filter box and connected to the bottom wall of the second filter box. The guide wall extends obliquely in the direction from the open end of the shell to the bottom wall of the shell toward the direction adjacent to the central axis of the second filter box.

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