CN212700844U

CN212700844U - Water filtering device and water heater using same

Info

Publication number: CN212700844U
Application number: CN201921922416.3U
Authority: CN
Inventors: 郭灵华; 吴桂安; 谢志辉; 史衍龙; 邓飞忠; 仇明贵; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2021-03-16
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a water filtering device and use its water heater, wherein water filtering device is applied to the water heater, and it includes shell body and first filter element group spare, first filter element group spare install the inside of shell body, first filter element group spare through first interface connection spare with the shell body link to each other. After the technical scheme is adopted, the water filtering device is simple in structure, the filter element assembly is matched with the outer shell through the first interface connecting piece, quick installation and disassembly are achieved, and the filter element assembly is convenient for a user to clean the inside of the filter element assembly after being disassembled.

Description

Water filtering device and water heater using same

Technical Field

The utility model relates to a water heater and filter equipment field, it is concrete, relate to a water filtering device and use its water heater.

Background

As shown in fig. 1, the water heater in the market at present protects the built-in water flow detection device B of the water heater a from being stuck through the simple filtering device, the mesh number of the used small-sized filter screen C is less than 60, and the water heater can only isolate impurities with the particle size of more than 0.25mm, and can not effectively isolate harmful substances such as tiny particles, worm eggs and the like in tap water. After the water heater is used for a long time, the small filter screen is easy to block, the flow of tap water is greatly reduced, and the normal use of the water heater is influenced; in addition, the filter screen is fixed in the water inlet joint, so that the assembly, disassembly and cleaning are very inconvenient.

Therefore, some users add a preposed precision filter at the water inlet end A of the water heater, which can further improve the water quality, improve the water flow and facilitate the daily maintenance. However, the pre-precise filter is expensive and requires a water pipe externally connected.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a water filtering device, which can overcome the above drawbacks, and is installed inside a water heater, and is simple in structure and easy to assemble and disassemble.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a water filtering device, its includes shell body and first filter element group spare, first filter element group spare install the inside of shell body, first filter element group spare through first interface connection spare with the shell body link to each other.

In the above technical solution, it further includes a second connector, and the other end of the first filter element assembly is connected to the outer housing through the second connector.

In the technical scheme, the first filter element component is filled with water purification particles.

In the above technical solution, the second connector is a second interface connector, and the second interface connector cooperates with the first interface connector to connect two ends of the first filter element assembly with the outer housing.

In the above technical scheme, the second connecting piece is a water valve body, and the water valve body is matched with the first interface connecting piece to connect the two ends of the first filter element assembly with the outer shell.

In the above technical solution, the second connecting member is a press-shaped protruding block, and the press-shaped protruding block is matched with the first interface connecting member to connect the two ends of the first filter element assembly with the outer housing.

In the above technical scheme, first filter element group spare include filter core shell and filter screen, filter core shell be equipped with filter screen frame, the filter screen setting be in filter screen frame on.

In the above technical scheme, first filter element group spare include filter core shell, filter screen and lower end cover, filter core shell be equipped with filter screen frame, the lower end cover with filter screen frame pass through buckle or threaded connection.

In the above technical scheme, first filter element group spare include filter core shell, filter screen and first upper end cover, filter core shell be equipped with filter screen frame, first upper end cover with filter screen frame pass through buckle or threaded connection.

In the above technical scheme, first filter element group spare include filter core shell, filter screen and second upper end cover, filter core shell be equipped with filter screen frame, the second upper end cover with filter screen frame pass through buckle or threaded connection.

In the above technical scheme, the first filter element assembly further comprises a small filter screen capable of preventing water purification particles from being washed away by water, and the small filter screen is arranged on the filter element shell.

In the technical scheme, the filter element shell is provided with a linear handle or an annular tooth cap.

In the technical scheme, the lower end cover is provided with a linear handle or an annular tooth cap.

In the technical scheme, the first filter element assembly (2) further comprises a small filter screen (26) capable of preventing purified water particles from being washed away by water, and the small filter screen (26) is arranged on the filter element shell (21).

In the technical scheme, the lower end cover is provided with a water discharging screw plug.

In the above technical scheme, the outer shell is provided with a one-way valve.

In the technical scheme, the mesh number of the filter screen is larger than 60 meshes.

In the technical scheme, the filter element assembly comprises a second filter element assembly, and the second filter element assembly is a metal product.

In the technical scheme, the second filter element component comprises a filter element straight pipe, an annular end cover, a circular filter screen and a pressing plate, wherein the annular end cover is arranged at two ends of the filter element straight pipe, the circular filter screen is arranged in the annular end cover, and the pressing plate is pressed tightly the circular filter screen and the circular filter screen are arranged in the annular end cover.

In the above technical scheme, the water valve body be equipped with water valve outer annular ring, water valve hole, interface of intaking and the interface of going out water, wherein the water valve outer annular ring with the design of water valve hole for coaxial syntropy, just the water valve outer annular ring with the interface intercommunication of intaking, the water valve hole with the interface intercommunication of going out water.

In the above technical scheme, the water valve body be equipped with water valve outer annular ring, water valve hole, interface and the interface of going out of intaking, wherein the water valve body the interface of intaking perpendicular to water valve hole axis, the water valve body go out the water interface with the interface of intaking coaxial.

In the above technical scheme, the water valve body be equipped with water valve outer annular ring, water valve hole, interface and the interface of going out of intaking, wherein the water valve body the interface of intaking and the interface of going out of water all be perpendicular to water valve hole axis, just the water valve body the interface of going out of water be perpendicular to the interface of intaking.

In the technical scheme, the outer shell is provided with a middle partition plate, the first filter element assembly is connected with the middle partition plate in a matched mode, and the second filter element assembly is connected with the middle partition plate in a matched mode.

A water heater comprises the water filtering device.

After the technical scheme is adopted, the water filtering device is simple in structure, the filter element assembly is matched with the outer shell through the first interface connecting piece, quick installation and disassembly are achieved, and the filter element assembly is convenient for a user to clean the inside of the filter element assembly after being disassembled.

Drawings

FIG. 1 is a schematic view of a conventional water heater with a small screen at the water inlet end;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a first schematic structural diagram of the outer casing of the present invention;

FIG. 4 is a schematic diagram of the structure of the outer casing of the present invention;

FIG. 5 is a first schematic structural view of a first filter element assembly according to the present invention;

FIG. 6 is a schematic structural view of a first filter element assembly according to the present invention;

fig. 7 is a third schematic structural view of the first filter element assembly of the present invention;

fig. 8 is a fourth schematic structural view of the first filter element assembly of the present invention;

fig. 9 is a schematic structural view of a first filter element assembly according to the present invention;

fig. 10 is a sixth schematic structural view of a first filter element assembly according to the present invention;

fig. 11 is a seventh structural schematic view of the first filter element assembly of the present invention;

fig. 12 is a schematic diagram of the internal structure of the present invention;

FIG. 13 is a first schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

FIG. 14 is a first schematic view of the filtering apparatus of the present invention installed at the water outlet end of a water heater;

FIG. 15 is a first schematic view of the filtering apparatus of the present invention installed at the water inlet end and the water outlet end of the water heater, respectively;

FIG. 16 is a second schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

FIG. 17 is a third schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

fig. 18 is an enlarged schematic view of the utility model at D;

fig. 19 is a third schematic view of the internal structure of the present invention;

fig. 20 is a fourth schematic structural diagram of the outer casing of the present invention;

fig. 21 is a schematic structural diagram of the outer shell of the present invention;

fig. 22 is a schematic structural view eight of the first filter element assembly of the present invention;

fig. 23 is a schematic structural view nine of a first filter element assembly according to the present invention;

fig. 24 is a schematic view of a first filter element assembly according to the present invention;

fig. 25 is a schematic structural view eleven of the first filter element assembly of the present invention;

fig. 26 is a fourth schematic view of the internal structure of the present invention;

fig. 27 is a first structural schematic view of a second filter element assembly according to the present invention;

fig. 28 is a second schematic structural view of a second filter element assembly according to the present invention;

fig. 29 is a third structural schematic view of a second filter element assembly according to the present invention;

fig. 30 is a fourth schematic structural view of a second filter element assembly according to the present invention;

FIG. 31 is a second schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

FIG. 32 is a second schematic view of the filtering device of the present invention installed at the outlet end of a water heater;

FIG. 33 is a second schematic view of the filtering apparatus of the present invention installed at the water inlet end and the water outlet end of the water heater, respectively;

FIG. 34 is a third schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

FIG. 35 is a fourth schematic view of the filtering apparatus of the present invention installed at the water outlet end of the water heater;

fig. 36 is a schematic view of the internal structure of the present invention;

fig. 37 is a sixth schematic structural view of the outer casing of the present invention;

fig. 38 is a schematic view seven of the structure of the outer casing of the present invention;

fig. 39 is an eighth schematic structural diagram of the outer casing of the present invention;

fig. 40 is a schematic view nine of the structure of the outer casing of the present invention;

fig. 41 is a schematic structural diagram ten of the outer casing of the present invention;

fig. 42 is a sixth schematic view of the internal structure of the present invention;

fig. 43 is a schematic perspective view of the first embodiment of the present invention;

FIG. 44 is a third schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

FIG. 45 is a third schematic view of the filtering device of the present invention installed at the water outlet end of a water heater;

FIG. 46 is a third schematic view of the filtering apparatus of the present invention installed at the water inlet end and the water outlet end of the water heater, respectively;

FIG. 47 is a fourth schematic view of the filtering apparatus of the present invention installed at the water inlet end of a water heater;

fig. 48 is a schematic view showing that the filtering device of the present invention is installed at the water outlet end of the water heater.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown with reference to fig. 2, the utility model discloses a water filtering device is applied to water heater, and it is including shell body 1 and first filter element group spare 2, wherein:

as shown in fig. 2, 3 and 4, the outer casing 1 is composed of an upper casing 11 and a lower casing 12 which are both hollow bowl-shaped, the upper casing 11 and the lower casing 12 are both integrally formed by stretching a metal plate, and the outer casing 1 is combined into a cylindrical hollow casing, so that the cylindrical hollow casing has strong pressure resistance.

As shown in fig. 2, 3, 4 and 18, a third interface connector 15 is arranged on the side surface of the outer shell 1, a second interface connector 13 is arranged on the upper end surface of the outer shell 1, the second interface connector 13 is a second connector, a first interface connector 14 is arranged on the lower end surface of the outer shell 1, and the upper shell 11, the lower shell 12, the second interface connector 13, the first interface connector 14 and the third interface connector 15 are all made of stainless steel and are connected and formed through a brazing process, so that the pressure resistance and the corrosion resistance are met; the second interface connector 13 and the first interface connector 14 are respectively provided with a second interface connector inner hole 131 and a first interface connector inner hole 141, and the second interface connector inner hole 131 and the first interface connector inner hole 141 are located on the same axis; the first interface connector bore 141 is provided with an internal thread 142, the first interface connector 14 of the outer housing 1 is provided with an outer flange 143, and a threaded hole 144 is provided on the outer flange 143, the internal thread 142 is used for matching with the first filter element assembly 2. The inner end face of the inner hole 131 of the second interface connector of the outer shell 1 is provided with a chamfer 132, which is convenient for the alignment and assembly of the first filter element assembly 2.

As shown in fig. 5, 6 and 18, the first filter element assembly 2 includes a filter element housing 21, a filter screen 22, a first sealing ring a and a second sealing ring b, the filter screen 22 is set in a tubular shape, the filter element housing 21 is a cylindrical hollow shell, and filter screen frames 211 regularly arranged are arranged on the side surfaces of the middle part of the filter element housing 21, and the filter screen 22 is tightly attached to the filter screen frames 211; the filter element interface 212 is arranged on the central axis of the upper end surface of the filter element shell 21, the lower end surface of the filter element shell 21 is closed and is provided with an external thread 213, and the first filter element component 2 is engaged and embedded in the outer shell 1 through the external thread 213 and the internal thread 142.

The outer wall of the filter element interface 212 of the filter element shell 21 is provided with a first sealing ring installation groove 214 for installing an annular first sealing ring a; the outer wall of the lower end face of the filter element shell 21 is provided with a second sealing ring installation groove 215 for installing an annular second sealing ring b, the filter element interface 231 is matched and connected with the inner hole 131 of the second interface connecting piece of the shell body 1 and is provided with an annular first sealing ring a, and the outer wall of the lower end face of the filter element shell 21 is matched and connected with the inner hole 141 of the first interface connecting piece of the shell body 1 and is provided with an annular second sealing ring b. The filter screen 22 divides the cavity inside the outer shell 1 into two parts, filters the tap water flowing into the outer shell 1, is not easy to block, and meets the requirement of large flow. The filter element shell 21 is formed by plastic injection molding, the filter screen 22 and the filter screen frame 211 are integrally formed by injection molding, and the mesh number of the filter screen 22 is preferably more than 60 meshes so as to achieve better filtering effect.

When the water heater is assembled, the third interface connecting piece 15 is connected with an external water pipe, the second interface connecting piece 13 is connected with the water pipe inside the water heater, the third interface connecting piece 15 serves as a water inlet, the second interface connecting piece 13 serves as a water outlet, the first interface connecting piece 14 is welded with the outer shell 1, the outer flange 143 of the first interface connecting piece 14 is fixed on the water heater through bolts, and the outer shell 1 on the first interface connecting piece 14 is located inside the water heater. The first cartridge assembly 2 is mounted inside the housing body 1 by mating the external threads 213 of the cartridge housing 21 with the internal threads 142 of the first interface connector 14.

When running water flows into the outer shell 1 from the third interface connection 15, impurities in the running water are filtered through the filter screen 22 on the first filter element assembly 2, and the filtered running water flows into the water heater through the second interface connection 13. The capacity of the inner cavity of the outer shell 1 is larger, and the mesh number of the filter screen 22 is larger than 60 meshes, so that high-capacity filtration can be realized, and the filtration is cleaner. The first filter element assembly 2 and the outer shell 1 are installed in a threaded mode, and the installation and the disassembly are both convenient. The filter has low cost and is suitable for household gas fast water heater and dual-purpose stove.

Example two:

the difference from the first embodiment is that, as shown in fig. 6, 7, and 8, the upper end surface of the filter element housing 21 is designed as a detachable first upper end cover 23, and a filter element interface 212 and a first sealing ring installation groove 214 are provided on the first upper end cover 23, and the first upper end cover 23 is connected with the upper end surface of the screen frame 211 through a snap-fit connection or a threaded connection. The filter element shell 21 is made into a detachable type, so that the inside of the filter element shell 21 and the filter screen can be cleaned conveniently.

Example three:

the difference from the first embodiment is that, as shown in fig. 9, the lower end surface of the filter element housing 21 is designed as a detachable lower end cover 24, and an external thread 213 and a second gasket mounting groove 215 are provided on the outer wall of the lower end cover 24, and the lower end cover 24 is connected with the lower end surface of the screen frame 211 by a snap fit or a screw thread. The filter element shell 21 is made into a detachable type, so that the inside of the filter element shell 21 and the filter screen can be cleaned conveniently.

Example four:

the difference from the first embodiment is that, as shown in fig. 36, 37, 38, 39 and 40, a housing upper connector 18 is disposed on the upper end surface of the outer housing 1, a first interface connector 14 is disposed on the lower end surface of the outer housing 1, and an inner hole 181 of the housing upper connector 18 and an inner hole 141 of the first interface connector 14 are located on the same axis; the water valve body 17 is used as a second connecting piece, the water valve body 17 is provided with a water valve outer annular hole 171, a water valve inner hole 172, a water inlet interface 173 and a water outlet interface 174, wherein the water valve outer annular hole 171 and the water valve inner hole 172 are designed to be coaxial and in the same direction, the water valve outer annular hole 171 is communicated with the water inlet interface 173, and the water valve inner hole 172 is communicated with the water outlet interface 174.

As shown in fig. 37, 38 and 39, the water valve outer ring 171 of the water valve body 17 is connected with the inner hole 181 of the housing upper interface 18 of the outer housing 1 in a matching manner and is provided with an annular fourth sealing ring d; the first filter element assembly 2 is embedded inside the outer shell 1, the filter element interface 212 is connected with the water valve inner hole 172 of the water valve body 17 in a matched mode and is provided with an annular first sealing ring a, the outer wall of the lower end face of the filter element shell 21 is connected with the first interface connecting piece inner hole 141 of the first interface connecting piece 14 in a matched mode and is provided with an annular second sealing ring b, and the outer threads 213 of the lower end face of the filter element shell 21 are connected with the inner threads 142 of the first interface connecting piece inner hole 141 of the first interface connecting piece 14 in a matched. As shown in fig. 37, 40 and 41, the tubular filter screen 22 divides the inner cavity of the outer housing 1 into two parts, and tap water flows in from the water inlet port 33 of the water valve body 17, flows into the cavity of the outer housing 1 through the water valve outer annular hole 171, flows into the inner cavity of the filter element assembly 2 after being filtered by the tubular filter screen 22, and finally flows out through the filter element port 212 and the water outlet port 34 of the water valve body 17. The tubular filter screen 22 has large area and is not easy to block, meets the requirement of large flow and is used for a long time.

Example five:

the fourth embodiment is characterized in that, referring to fig. 42, the water inlet 173 of the water valve body 17 is perpendicular to the central axis of the water valve inner bore 172, and the water outlet 174 of the water valve body 17 is coaxial with the water inlet 173.

Example six:

the fourth embodiment has the distinctive feature that, referring to fig. 43, the water inlet 173 and the water outlet 174 of the water valve body 17 are both perpendicular to the central axis of the water valve inner bore 172, and the water outlet 174 of the water valve body 17 is perpendicular to the water inlet 173.

Example seven:

a distinguishing feature from the first embodiment is that, as shown in fig. 19, 20, 21, and 26, the outer case 1 is a cylindrical hollow case composed of an upper case 11, a lower case 12, and a middle partition 10; wherein the upper case 11 and the lower case 12 are integrally drawn from a metal plate into a hollow bowl shape.

As shown in fig. 20 and 21, the open surface of the bottom of the upper shell 11 is provided with an outer flange 111, and the open surface of the top of the lower shell 12 is provided with a flanged outer flange 121; the middle partition 10 is a circular metal plate, the outer diameter of which is the same as the outer flange 111 of the upper shell 11, and the flanged hole 101 is formed in the center of the middle partition 10, and the flanged flange 121 faces upward. The outer flange 121 of the turned edge on the top of the lower shell 12 is attached to the middle partition plate 10, and then is attached and fastened to the outer flange 121 on the bottom of the upper shell 11, and the middle partition plate 10 divides the inner cavity of the outer shell 1 into two parts.

The fourth interface connector 16 is disposed on the side of the upper housing 11, and the press-formed protrusion 112 is disposed on the top sealing surface of the upper housing 11. A third interface connector 15 is arranged on the side surface of the lower shell 12, a first interface connector 14 is arranged at the bottom of the lower shell 12, the first interface connector 14 of the outer shell 1 is provided with an outer flange 143, a threaded hole 144 is arranged on the outer flange 143, and an inner hole 141 of the first interface connector 14 is provided with an inner thread 142; the upper shell 11, the lower shell 12, the middle partition plate 10, the first interface connecting piece 14, the third interface connecting piece 15 and the fourth interface connecting piece 16 of the outer shell 1 are preferably made of stainless steel and are connected and formed through a brazing process, so that the pressure resistance and the corrosion resistance are met; the upper shell 11 is provided with a profiling convex block 112, the profiling convex block 112 is used as a second connecting piece, the first interface connecting pieces 14 of the lower shell 12 and the flanging hole 101 of the middle partition plate 10 are all located on the same axis, and the third interface connecting piece 15 of the lower shell 12 and the fourth interface connecting piece 16 of the upper shell 11 can be designed to be on the same side or different sides so as to meet the requirement of waterway installation of different types.

As shown in fig. 19 and 22, the first filter element assembly 2 includes a filter element housing 21, a filter screen 22, a third seal ring c and a second seal ring b, the filter screen 22 is set in a tubular shape, the first filter element assembly 2 is composed of the filter element housing 21 and the filter screen 22, the filter element housing 21 is a cylindrical hollow shell, filter screen frames 211 regularly arranged are respectively arranged on the top and bottom sides of the filter element housing 21, and the filter screen 22 is tightly attached to the corresponding filter screen frame 211; an annular step 219 is provided at the top of the cartridge housing 21, and the bottom of the cartridge housing 21 is closed and provided with external threads 213. The first filter element assembly 2 is embedded inside the outer housing 1.

An annular step 219 at the top of the filter element shell 21 is matched and positioned with the profiling convex block 112 of the upper shell 11, and a third sealing ring installation groove 218 is arranged on the outer wall of the middle part of the filter element shell 21 and used for installing an annular third sealing ring c; the outer wall of the bottom of the filter element shell 21 is provided with a second sealing ring mounting groove 215 for mounting an annular second sealing ring b, the filter element shell 21 is matched and connected with the flanging hole 101 of the intermediate baffle plate 10 and is provided with an annular third sealing ring c, the filter element shell 21 is matched and connected with the inner hole 141 of the first interface connecting piece 14 of the lower shell 12 and is provided with an annular second sealing ring b, and the external thread 213 of the bottom of the filter element shell 21 is matched and connected with the internal thread 142 of the first interface connecting piece 14 of the outer shell 1. Running water flows in from the third interface connection piece 15 of shell body 1 the utility model discloses create removable water filtering device's lower cavity, flow to 2 top inner chambers of first filter element group spare after passing 2 first layer filter screens 22 in first filter element group spare bottom, pass 2 top second layer filter screens 22 in first filter element group spare again, the running water flows out from the second interface connection piece 15 of shell body 1 after double filtration. The filter element shell 21 is formed by plastic injection molding, the tubular filter screen 22 and the filter screen frame 211 are integrally formed by injection molding, and the mesh number of the tubular filter screen 22 is preferably more than 60 meshes so as to achieve better filtering effect.

As shown in fig. 31, 32 and 33, when the water heater is assembled, the third interface connector 15 is connected with an external water pipe, the fourth interface connector 16 is connected with an internal water pipe of the water heater, the third interface connector 15 is used as a water inlet, the fourth interface connector 16 is used as a water outlet, the first interface connector 14 is welded with the outer shell 1, the outer flange 143 of the first interface connector 14 is fixed on the water heater through bolts, and the outer shell 1 on the first interface connector 14 is located inside the water heater. The first cartridge assembly 2 is mounted inside the housing body 1 by mating the external threads 213 of the cartridge housing 21 with the internal threads 142 of the first interface connector 14.

When the tap water flows into the outer shell 1 from the third interface connection 15, the impurities in the tap water are filtered by the filter screen 22 on the first filter element assembly 2, and the filtered tap water flows into the water heater through the fourth interface connection 16. The capacity of the inner cavity of the outer shell 1 is larger, and the mesh number of the filter screen 22 is larger than 60 meshes, so that high-capacity filtration can be realized, and the filtration is cleaner. The first filter element assembly 2 and the outer shell 1 are installed in a threaded mode, and the installation and the disassembly are both convenient. The filter has low cost and is suitable for household gas fast water heater and dual-purpose stove.

Example eight:

the difference from the seventh embodiment is that, as shown in fig. 22, 23 and 25, the upper end surface of the cartridge housing 21 is designed as a detachable second upper end cover 23a, and the second upper end 23a is connected with the screen frame 211 by means of screw threads or a snap fit.

Example nine:

the difference from the above embodiment is that, as shown in fig. 10, 11 and 25, the inner cavity of the first filter element assembly 2 is filled with water purification particles 27 for filtering water, and a small filter screen 26 is arranged in the inner hole of the filter element interface 212 to prevent the water purification particles from being washed away by water. The water purification particles 27 can be activated carbon (chlorine absorption and odor purification), soft water resin (hardness reduction), KDF copper-zinc alloy (heavy metal removal), scale inhibitor (scale reduction), tourmaline (trace element release) and the like, can be made of single materials or composite materials, achieve better filtering effect, and meet different water requirements of users.

Example ten:

the difference from the eighth embodiment is that, as shown in fig. 11, the lower end surface of the cartridge housing 21 is designed as a detachable lower end cap 24, a small filter screen 26 is disposed in an inner hole of the cartridge interface 212, the inner cavity of the first cartridge assembly 2 is filled with water purification particles 27 for water filtration, and the lower end surface of the filter screen frame 211 of the cartridge housing 21 is connected with a sealing cover 25 by a snap fit or a screw thread manner to seal the water purification particles. So, after the water purification granule 27 of first filter element group spare 2 piles up the filth and blocks up the water route, can unscrew bottom end cover 24 to take out first filter element group spare 2, screw back bottom end cover 24 again, then the water heater can normal use, and can wash first filter element group spare 2 alone.

Example eleven:

the distinguishing feature from the above embodiment is that the first filter element assembly 2 is replaced by a second filter element assembly 5 as shown with reference to fig. 26, 27, 28, 29, 30, in which:

as shown in fig. 26, 27, 28, 29 and 30, the present invention provides a detachable water filtering device using a second filter element assembly 5, wherein the second filter element assembly 5 is formed by splicing metal plates (preferably stainless steel plates), and the second filter element assembly 5 comprises a filter element straight pipe 51, an annular end cover 52, a circular filter screen 53 and a pressing plate 54. The filter element straight tube 51 is a circular straight tube with two open ends, the two ends of the filter element straight tube 51 are respectively provided with a through hole 511 and a limiting ring 513 which are regularly arranged on the circumference, and the middle part of the filter element straight tube 51 is provided with a third sealing ring mounting groove 512 for mounting an annular first sealing ring a. The annular end cover 52 and the pressing plate 54 are both punched into a circular thin plate by metal plates, and water through holes 521 are arranged in the middle of the circular thin plate; the outer contour of annular end cap 52 is provided with a flanging ring 522 which is matched with the inner wall of filter element straight pipe 51. The outer diameter of the circular filter screen 53 is equal to that of the annular end cover 52, and the mesh number of the circular filter screen is preferably more than 60 meshes, so that a better filtering effect is achieved. The circular screen 53 is placed between the annular end cap 52 and the pressure plate 54, and the three are welded together. Two ends of the straight filter element pipe 51 are respectively embedded with an annular end cover 52 containing a filter screen, and are positioned by a limiting ring 513 to form a filter element containing cavity; the flanging ring 522 of the annular end cover 52 is tightly attached to the inner wall of the straight filter element pipe 51 and welded together. The inner cavity of the second filter element component 5 is filled with water purifying particles 27 for filtering water quality.

Example twelve:

the distinguishing feature from the above embodiments is that, as shown with reference to fig. 5, 6, 7, 8, 9, 22, 23, 24, 28, 29, the lower end surface or the lower end cap 24 of the cartridge housing 21 is provided with a linear handle 216 or an annular dental cap 217, the linear handle 216 and the screwdriver are matched to facilitate the screwing and the dismounting of the first cartridge assembly 2, and the annular dental cap 217 can be used for manually screwing and dismounting the first cartridge assembly 2.

Example thirteen:

the difference from the above embodiments is that, as shown in fig. 12 and 47, the lower end face or the lower end cover 24 of the filter element housing 21 is provided with a water drain screw plug 28, and the water drain screw plug 28 is screwed off before the first filter element assembly 2 or the second filter element assembly 5 is replaced, so as to drain the cavity water, and prevent the water from spraying out and wetting the surrounding environment when the filter element is detached.

Example fourteen:

the distinguishing feature of the above embodiment is, referring to fig. 13, 14, 31, 32, 34, 35, 44, 45, the utility model discloses removable water quality filtering device installs the water inlet/outlet pipeline in the inside main water route of water heater body, and outer shell 1 third interface connection 15 and water heater water inlet/outlet interface connection, and outer shell 1's second interface connection 13 or fourth interface connection 16 and water heater water inlet/outlet pipe connection. The outer flange 143 of the first interface connection 14 of the outer shell 1 is fixed to the water heater shell by screw connection.

Example fifteen:

the difference characteristic with above embodiment does, and it is shown with reference to fig. 15, 33, 36, 46 that the utility model discloses removable water quality filtering device installs respectively in the inlet channel and the outlet channel in the inside main water route of water heater body, realizes the doublestage and filters, further promotes the water purification effect.

Example sixteen:

the distinguishing feature with the above embodiment is, as shown with reference to fig. 16, 17, 47, 48, the utility model discloses removable water quality filtering device installs at the inside main water route of water heater body, and the check valve 29 that switches on the direction and the running water flow direction unanimity is installed at removable water quality filtering device's play water kneck. When changing first filter element group spare 2, check valve 29 can prevent that the water heater from depositing water conservancy diversion extremely the utility model discloses removable water quality filtering device shell body 1 shortens and changes first filter element group spare 2 time, reduces the water waste.

Example sixteen:

a water heater applies the water filtering device.

The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a water filtering device, is applied to the water heater, and it includes shell body (1) and first filter element group spare (2), its characterized in that, first filter element group spare (2) install the inside of shell body (1), first filter element group spare (2) through first interface connection spare (14) with shell body (1) link to each other.

2. A water filtering device according to claim 1, characterized in that it further comprises a second connection member by means of which the other end of the first filter element assembly (2) is connected to the outer casing (1).

3. A water filtering device according to claim 2, characterized in that the first filter element module (2) is filled with water purification particles (27).

4. A water filtering device according to claim 3, wherein the second connection member is a second interface connection member (13), and the second interface connection member (13) is matched with the first interface connection member (14) to connect both ends of the first filter element assembly (2) with the outer casing (1).

5. A water filtering device according to claim 3, wherein the second connection member is a water valve body (17), and the water valve body (17) cooperates with the first interface connection member (14) to connect both ends of the first filter element assembly (2) to the outer housing (1).

6. A water filtering device according to claim 3, wherein the second connecting member is a profiled projection (112), and the profiled projection (112) cooperates with the first interface connection (14) to connect the two ends of the first cartridge assembly (2) to the outer housing (1).

7. A water filtering device according to claim 4, characterized in that the first filter element assembly (2) comprises a filter element housing (21) and a filter screen (22), the filter element housing (21) is provided with a filter screen frame (211), and the filter screen (22) is arranged on the filter screen frame (211).

8. Water filtering device according to claim 4, wherein the first filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and a lower end cap (24), the filter element housing (21) is provided with a filter screen frame (211), and the lower end cap (24) is connected with the filter screen frame (211) through a buckle or a screw thread.

9. A water filtering device according to claim 4, characterized in that the first filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and a first upper end cover (23), the filter element housing (21) is provided with a filter screen frame (211), and the first upper end cover (23) is connected with the filter screen frame (211) through a buckle or a screw thread.

10. A water filtering device according to claim 6, wherein the first filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and a second upper end cover (23a), the filter element housing (21) is provided with a filter screen frame (211), and the second upper end cover (23a) is connected with the filter screen frame (211) through a buckle or a screw thread.

11. A water filtering device according to any one of claims 7-9, characterized in that the first filter element assembly (2) further comprises a small screen (26) for preventing clean water particles from being washed away by the water, the small screen (26) being provided on the filter element housing (21).

12. A water filtering device according to claim 7, 9 or 10, characterized in that the cartridge housing (21) is provided with a straight handle (216) or an annular dental cap (217).

13. Water filtering device according to claim 8, wherein said lower end cap (24) is provided with a straight handle (216) or an annular dental cap (217).

14. Water filtering device according to claim 5, wherein the first filter element assembly (2) comprises a filter element housing (21) and a filter screen (22), the filter element housing (21) is provided with a filter screen frame (211), and the filter screen (22) is arranged on the filter screen frame (211).

15. Water filtering device according to claim 5, wherein the first filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and a lower end cap (24), the filter element housing (21) is provided with a filter screen frame (211), and the lower end cap (24) is connected with the filter screen frame (211) through a buckle or a screw thread.

16. A water filtering device according to claim 5, characterized in that the first filter element assembly (2) comprises a filter element housing (21), a filter screen (22) and a first upper end cover (23), the filter element housing (21) is provided with a filter screen frame (211), and the first upper end cover (23) is connected with the filter screen frame (211) through a buckle or a screw thread.

17. A water filtering device according to any one of claims 14-16, wherein the first filter element assembly (2) further comprises a small screen (26) for preventing clean water particles from being washed away by the water, the small screen (26) being provided on the cartridge housing (21).

18. A water filtering device as claimed in claim 14 or 16, characterized in that the cartridge housing (21) is provided with a straight handle (216) or an annular dental cap (217).

19. Water filtering device according to claim 8, wherein said lower end cap (24) is provided with a straight handle (216) or an annular dental cap (217).

20. Water filtering device according to claim 8, characterized in that the lower end cap (24) is provided with a drain screw plug (28).

21. Water filtering device according to any one of the claims 1-6, wherein the outer casing (1) is provided with a non-return valve (29).

22. A water filtering device according to any one of claims 7, 8, 9, 10, 14, 15 or 16 wherein the mesh size of the screen (22) is greater than 60 mesh.

23. A water filtering device according to claim 6, characterized in that it comprises a second filter element module (5), said second filter element module (5) being of metal.

24. The water filtering device according to claim 23, wherein the second filter element assembly (5) comprises a straight filter element tube (51), an annular end cap (52), a circular filter screen (53) and a pressing plate (54), the annular end cap (52) is covered at two ends of the straight filter element tube (51), the circular filter screen (53) is arranged in the annular end cap (52), and the pressing plate (54) is pressed against the circular filter screen (53) and covered in the annular end cap (52).

25. Water filtering device according to claim 5, wherein the water valve body (17) is provided with a water valve outer ring hole (171), a water valve inner hole (172), a water inlet port (173) and a water outlet port (174), wherein the water valve outer ring hole (171) and the water valve inner hole (172) are coaxially and cocurrently designed, the water valve outer ring hole (171) is communicated with the water inlet port (173), and the water valve inner hole (172) is communicated with the water outlet port (174).

26. The water filtering device according to claim 5, wherein the water valve body (17) is provided with a water valve outer ring hole (171), a water valve inner hole (172), a water inlet interface (173) and a water outlet interface (174), wherein the water inlet interface (173) of the water valve body (17) is perpendicular to the central axis of the water valve inner hole (172), and the water outlet interface (174) of the water valve body (17) is coaxial with the water inlet interface (173).

27. The water filtering device according to claim 5, wherein the water valve body (17) is provided with a water valve outer ring hole (171), a water valve inner hole (172), a water inlet connector (173) and a water outlet connector (174), wherein the water inlet connector (173) and the water outlet connector (174) of the water valve body (17) are perpendicular to a central axis of the water valve inner hole (172), and the water outlet connector (174) of the water valve body (17) is perpendicular to the water inlet connector (173).

28. A water filtering device according to claim 23, characterized in that the outer casing (1) is provided with an intermediate partition (10), the first filter element assembly (2) being in a mating connection with the intermediate partition (10), and the second filter element assembly (5) being in a mating connection with the intermediate partition (10).

29. A water heater including a water filtering device as claimed in any one of claims 1 to 28.