CN216571840U

CN216571840U - A water heater that is used for filter equipment of water heater front end and contains it

Info

Publication number: CN216571840U
Application number: CN202220067949.3U
Authority: CN
Inventors: 王菲
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-05-24
Anticipated expiration: 2032-01-11

Abstract

The utility model provides a water heater that is used for filter equipment of water heater front end and contains it for the filter equipment of water heater front end includes: the water inlet and the water outlet are arranged on the shell; the filter element assembly is detachably and hermetically connected with the shell and comprises a primary filter part and a secondary filter part, the primary filter part comprises a second water inlet and an arc-shaped plate, the arc-shaped plate is positioned at the position, close to the second water inlet, of the primary filter part, and the arc-shaped plate is used for shunting water entering through the second water inlet; wherein, when being used for the filter equipment of water heater front end in operating condition: the first water inlet is communicated with the second water inlet, and water flows through the primary filtering part and is filtered, and is output through the water outlet after being filtered by the secondary filtering part. The utility model provides a filter equipment's arc shunts the rivers that get into the second water inlet to reduce the rivers noise in the water heater. The filtering effect on the water flow is enhanced through twice filtering.

Description

A water heater that is used for filter equipment of water heater front end and contains it

Technical Field

The utility model relates to a water heater that is used for filter equipment of water heater front end and contains it.

Background

Filter equipment in the water heater can filter impurity such as silt in user's family's running water, avoids impurity entering deposit behind the water heater in the water heater pipeline, and the pipeline can be corroded to the impurity of deposit in the water heater pipeline, further influences heat exchange efficiency. The end of intaking of filter equipment connects water heater water pump and goes out water end, and its play water end is connected heat exchanger's the end of intaking, and nevertheless, the velocity of flow is very fast when water that flows out from the water pump gets into filter equipment, produces the noise easily, influences the user and uses experience.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a water heater that is used for the filter equipment of water heater front end and contains it in order to overcome among the prior art the water pump water that flows and produce the defect of noise easily when getting into filter equipment.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

the utility model provides a filter equipment for water heater front end, a filter equipment for water heater front end includes:

the water inlet and the water outlet are arranged on the shell;

the filter element assembly is detachably and hermetically connected with the shell and comprises a primary filter part and a secondary filter part, the primary filter part comprises a second water inlet and an arc-shaped plate, the arc-shaped plate is positioned at the position, close to the second water inlet, of the primary filter part, and the arc-shaped plate is used for shunting water entering through the second water inlet;

wherein, when the filter equipment for water heater front end is in operating condition: the first water inlet is communicated with the second water inlet, and water flows through the primary filtering part and is filtered, and is output through the water outlet after being filtered by the secondary filtering part.

In the scheme, the structure is adopted, on the one hand, the water flow flowing out of the water outlet end of the water pump enters the primary filtering part through the first water inlet, and the arc-shaped plate divides the water flow entering the second water inlet, so that the water flow noise in the water heater is reduced, and the use experience of a user is improved; in the second aspect, when the filter device for the front end of the water heater works, water flow sequentially passes through the first-stage filter part and the second-stage filter part for filtering, is output through the water outlet, and is filtered twice, so that the filtering effect on the water flow is enhanced, and the water quality of bath water in the water heater is greatly improved.

Preferably, the first-stage filtering part comprises a first filter element, the first filter element comprises a filter plate and an arc-shaped plate, the arc-shaped plate is arranged on the upper surface of the filter plate, and the filter plate is used for filtering water shunted by the arc-shaped plate.

In this scheme, adopt above-mentioned structural style, the rivers that are shunted by the arc process filter plate to the realization does benefit to the filtration of purifying water heater complete machine water route to rivers, and extension water heater life provides high-quality bathing water simultaneously. Water can also enter the inner cavity of the first filter element through the water inlet hole and then pass through the filter plate so as to realize the filtration of water flow. Specifically, the arc sets up in the upper surface of filter vertically.

Preferably, the first filter element further comprises drainage plates arranged on two sides of the arc-shaped plate, the two drainage plates and the arc-shaped plate are sequentially connected and enclosed to form a filter cartridge, a water inlet hole is formed in the arc-shaped plate, an inner cavity of the filter cartridge can be communicated with the second water inlet through the water inlet hole, and the inner cavity of the filter cartridge can be communicated with the secondary filter part through the filter plate.

In this scheme, adopt above-mentioned structural style, rivers pass through the inlet opening and get into the cartridge filter inner chamber in order to realize the filtration to the bathing water, can place the material that medical stone, mineral stone etc. can purify or strengthen quality of water in the cartridge filter, and water can strengthen the filtering capability to it when straining a section of thick bamboo. The filterable rivers of cartridge filter flow into secondary filter portion again to the realization is to the secondary filtration of rivers, can strengthen the filter effect to the bathing water.

Preferably, the filter plate is provided with a plurality of first filter holes.

In this scheme, adopt above-mentioned structural style, a plurality of first filtration pores that cross in the filter is crossed to rivers in straining a section of thick bamboo and get into second grade filter portion, offer the through-hole at the filter as first filtration pore of crossing, processing is convenient.

Preferably, the cross-sectional width of the filter cartridge is gradually reduced from the two ends of the arc-shaped plate to the direction far away from the second water inlet.

In this scheme, adopt above-mentioned structural style, the cross-section of cartridge filter is the wedge, and this design has greatly reduced the rivers noise that flows from water pump outlet end.

Preferably, the primary filter part comprises a positioning seat, the outer side wall of the positioning seat is tightly attached to the inner side wall of the shell, the side wall of the positioning seat is provided with the second water inlet, the filter cartridge is arranged in the positioning seat, and the positioning seat and the filter plate are enclosed to form a first filter cavity.

In this scheme, adopt above-mentioned structural style, rivers loop through first water inlet, second water inlet and get into first filter chamber and filter, and the outside lateral wall of positioning seat closely laminates with the inboard lateral wall of casing, prevents that rivers from directly flowing into the clearance between filter element group spare and the casing from first water inlet, can't realize the filtration to bathing water.

Preferably, the inner wall of the positioning seat is provided with a protruding part, and the protruding part can be embedded into the filter cylinder.

In this scheme, adopt above-mentioned structural style, bulge embedding cartridge filter for filter element group spare pivoted in-process, the positioning seat rotates thereupon, in order to realize the intercommunication and the closure in water route. The water inlet passage in the filtering device used for the front end of the water heater is controlled to be communicated and sealed by rotating the filter element assembly, so that the water heater is convenient for user operation, and time and labor are saved.

Preferably, the periphery of the filter plate is provided with a fixing ring, the lower end of the positioning seat is provided with an embedded groove, the upper end of the fixing ring is embedded into the embedded groove, and the lower end of the fixing ring is embedded into the secondary filter part.

In this scheme, adopt above-mentioned structural style, rivers get into first filter chamber through the second water inlet and filter, and solid fixed ring's upper end embedding positioning seat prevents that rivers from directly flowing into the space between filter element group spare and the casing from the clearance between filter and the positioning seat, can't realize the filtration to the bathing water.

Preferably, the second-stage filter part comprises a second filter element, the second filter element is arranged in a tubular shape, the second filter element is embedded with the fixing ring, a plurality of second filter holes are formed in the side wall of the second filter element, and the second filter holes are communicated with the water outlet.

In this scheme, adopt above-mentioned structural style, rivers filter in flowing into the second filter core from one-level filter house, can place filter materials such as PP cotton in the second filter core to water purification, the rivers after the second filter core filters pass through the second and filter the hole flow direction delivery port, and export through the delivery port, in order to realize the purification and the filtration to the bathing water.

Preferably, the filter element assembly further comprises a filter element base, the second-stage filter part is inserted into the filter element base, and the inner side wall of the shell is in threaded connection with the outer side wall of the filter element base.

In this scheme, adopt above-mentioned structural style, rotatory filter core base can realize being connected and breaking away from between second grade filter house and the casing, second grade filter house embedding one-level filter house, and filter element group spare can be connected with the casing and break away from, and convenience of customers dismantles filter element group spare and washs or changes. In addition, the threads are machined on the inner side wall of the shell and the outer side wall of the filter element base, so that threaded connection between the inner side wall of the shell and the outer side wall of the filter element base is achieved, the production process difficulty is low, and machining is convenient.

Preferably, a sealing ring is arranged between the filter element base and the shell, a sealing groove is formed in the outer wall of the filter element base, and the sealing ring is arranged in the sealing groove;

and/or when the filtering device for the front end of the water heater is in a working state, the filter element base part is externally arranged on the shell.

In this scheme, adopt above-mentioned structural style, set up the sealing washer between filter core base and the casing, reducible or avoid the filter equipment who is used for the water heater front end to take place the condition of leaking water, also can improve the whole bearing capacity of filter equipment who is used for the water heater front end. When the user need be dismantled filter element group spare, rotatory filter core base makes filter element group spare and casing break away from, because the casing is arranged in to filter core base part is external, the user of being convenient for rotates filter element group spare outside the casing, need not to stretch into casing rotatory filter element group spare again and take out it, has improved user experience greatly and has felt.

Preferably, the filtering device for the front end of the water heater has the working state and the non-working state, and when the filtering device for the front end of the water heater is in the non-working state, the first water inlet and the second water inlet can be staggered through the rotation motion of the positioning seat.

The utility model provides a water heater, water heater include as above a filter equipment for water heater front end, the lower tip of casing is installed on the bottom plate of water heater, be equipped with the through hole on the bottom plate, filter element group spare can pass through hole and part stretch out the bottom plate.

In this scheme, adopt above-mentioned structural style, the filter element group spare can realize breaking away from with the casing through the rotation, and the user is rotatory to be pressed the filter element group spare and can easily take out the filter element group spare from the water heater and clean, and the filter element group spare is plugged in or is taken out through the through hole, and convenience of operation is washd, convenient user dismantles the filter element group spare.

The utility model discloses an actively advance the effect and lie in:

on the first hand, the water flow flowing out of the water outlet end of the water pump enters the primary filtering part through the first water inlet, and the arc-shaped plate divides the water flow entering the second water inlet so as to reduce the water flow noise in the water heater and improve the use experience of a user; in the second aspect, when the filter device for the front end of the water heater works, water flow sequentially passes through the first-stage filter part and the second-stage filter part for filtering, is output through the water outlet, and is filtered twice, so that the filtering effect on the water flow is enhanced, and the water quality of bath water in the water heater is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of a filtering device for a water heater in embodiment 1 of the present invention.

Fig. 2 is another angle structure diagram of the filtering device for a water heater in embodiment 1 of the present invention.

Fig. 3 is a schematic structural view of the housing and the filter element base in embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of the positioning seat and the self-locking push switch in

embodiments

1 and 2 of the present invention.

Fig. 5 is a schematic structural diagram of a first filter element in embodiment 1, embodiment 2 and embodiment 3 of the present invention.

Fig. 6 is a schematic structural diagram of the positioning seat in embodiment 1 and embodiment 2 of the present invention.

Fig. 7 is a schematic structural diagram of another angle of the positioning seat in

embodiments

1 and 2 of the present invention.

Fig. 8 is a schematic structural view of a front-mounted filter device according to embodiment 2 of the present invention.

Fig. 9 is a schematic structural view of a front-mounted filter device according to embodiment 2 of the present invention at another angle.

Fig. 10 is a schematic view of the housing and the filter element base according to embodiment 2 of the present invention.

Fig. 11 is a schematic structural diagram of a filtering apparatus for a front end of a water heater according to embodiment 3 of the present invention.

Fig. 12 is a schematic structural view of another angle of the filtering device for the front end of a water heater according to embodiment 3 of the present invention.

Description of the reference numerals:

housing 1

First water inlet 11

Water outlet 12

First groove 13

Second groove 14

Guide groove 15

First guide groove 151

Second guide groove 152

First clamping part 1521

Self-locking push type switch 2

Lock catch shell 21

Guide rail 211

Elastic member 22

Fastener 23

Filter element assembly 3

Filter element main body 31

First-stage filter 311

Positioning seat 3111

Spacing ring 31111

Clamping part 31112

Convex part 31113

Second water inlet 31114

Fitting groove 31115

First filter element 3112

Filter cartridge 31121

Arc plate 311211

Water inlet 3112111

Drainage plate 311212

Filter plate 31122

First filtering hole 311221

Fixing ring 31123

Second stage filter part 312

Second filter element 3121

The second filtering holes 31211

Filter cartridge base 32

Connecting part 321

Connecting structure 322

Second position-limiting portion 3221

Second clamping part 3222

Seal groove 323

Connecting plate 4

Conduction groove 41

First limit part 42

Sealing ring 5

Spring 6

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.

Example 1

An embodiment of the present invention provides a filtering device for a water heater, as shown in fig. 1-7. A filter assembly for a water heater includes a housing 1, a self-locking push switch 2 and a filter cartridge assembly 3. The shell 1 comprises a first water inlet 11 and a water outlet 12, the first water inlet 11 is connected with the water outlet end of a water pump of the water heater, and the water outlet 12 is connected with the water inlet end of the heat exchanger. The self-locking pressing switch 2 is installed on the housing 1, and the filter element assembly 3 is configured to be connected to and disconnected from the self-locking pressing switch 2 by being pressed. Filter element group spare 3 can be through pressing down the realization with be connected of auto-lock push type switch 2, when filter element group spare 3 is connected with auto-lock push type switch 2, make it be connected with auto-lock push type switch 2 through pressing filter element group spare 3 promptly, filter element group spare 3 and casing 1 sealing connection, form the filter chamber in the casing 1, the water that the water pump goes out the water outlet end gets into the filter chamber from first water inlet 11 filters the back through delivery port 12 and discharges through filter element group spare 3, filter element group spare 3 filters the rivers through casing 1, reduce the sediment of impurity in the water heater pipeline, improve quality of water. Filter element group spare 3 can be through pressing the realization and breaking away from with auto-lock push type switch 2, press filter element group spare 3 and can make it break away from with the auto-lock push type switch 2 of installing in casing 1, the user can easily take out filter element group spare 3 and clean through pressing filter element group spare 3, and convenience of operation is washd to convenience of customers dismantlement filter element group spare 3. After the filter element assembly 3 is replaced, the whole water path of the water heater can be purified, the service life of the water heater can be prolonged, and high-quality bath water can be provided.

The filter element assembly 3 includes a positioning seat 3111, a clamping portion 31112 is disposed at the top of the positioning seat 3111, and the clamping portion 31112 can be clamped with or separated from the self-locking press switch 2. The filter element assembly 3 is connected with the shell 1 in a clamped mode through the connection of the clamping portion 31112 and the self-locking press type switch 2, the fixing effect is stable, namely the filter element assembly 3 is connected between the positioning seat 3111 and the clamping portion 31112 through pressing, so that the filter element assembly 3 is installed, and the water heater achieves the filtering function; realize breaking away from of filter element group spare 3 and casing 1 through being connected of joint portion 31112 and auto-lock push type switch 2, realize breaking away from between positioning seat 3111 and joint portion 31112 through pressing filter element group spare 3 promptly to dismantle filter element group spare 3, the user of being convenient for dismantles washing convenient operation to filter element group spare 3.

The periphery side cover of auto-lock push switch 2 is equipped with spring 6, and positioning seat 3111's top sets up

spacing ring

31111, and 6 one end butt casings 1's inner wall of spring, the other end are arranged in spacing ring 31111 and the top of butt positioning seat 3111, and spring 6 is arranged in spacing ring 31111, can fix spring 6's mounted position, prevents that the user from pressing filter element group spare 3's in-process, and spring 6 can deviate its compression route or route that resets. The spring 6 can restrict the degree of freedom of displacement of the engaging portion 31112 in the pressing direction along the filter cartridge assembly 3. In-process of pressing filter element group spare 3, spring 6 carries on spacingly to the removal of filter element group spare 3, and the user is at the in-process of pressing, has greatly reduced the possibility of bad auto-lock push type switch 2 in joint portion 31112 top.

The filter core subassembly includes first filter core 3112, and first filter core 3112 includes arc 311211, and the lateral wall of positioning seat 3111 sets up second water inlet 31114, and second water inlet 31114 can communicate with first water inlet 11, and arc 311211 is located the position that is close to second water inlet 31114 of first filter 3112, and arc 311211 is used for the moisture reposition of redundant personnel that gets into via second water inlet 31114. In the process of rotating filter element group spare 3, second water inlet 31114 can make second water inlet 31114 can communicate with first water inlet 11 towards first water inlet 11, and the water of water pump play water end gets into positioning seat 3111 through second water inlet 31114 from first water inlet 11, and the water that gets into positioning seat 3111 shunts when passing through arc 311211 to reduce the rivers noise in the water heater.

The inner wall of the positioning seat 3111 has a protrusion 31113, and the protrusion 31113 can be fitted into the first filter element 3112. The protrusion 31113 is embedded in the first filter element 3112, so that in the process of rotating the first filter element 3112, the positioning seat 3111 rotates along with it, and the water inlet passage is communicated and sealed. When the filtering device for the water heater is in a working state, the second water inlet 31114 is communicated with the first water inlet 11 by rotating the filter element assembly 3, when the filtering device for the water heater is in a non-working state, the second water inlet 31114 and the first water inlet 11 form a certain angle by rotating the filter element assembly 3, and a water inlet path is closed. The water inlet passage in the filtering device for the water heater is controlled to be communicated and sealed by rotating the filter element component 3, so that the water heater is convenient for user operation and saves time and labor.

In some embodiments, the arc plate 311211 is provided with a water inlet 3112111, and water enters the inner cavity of the first filter element 3112 through the water inlet 3112111 to filter the bath water. The first filter cartridge 3112 includes a filter plate 31122, an arc 311211 is disposed on an upper surface of the filter plate 31122, and the filter plate 31122 is used for filtering water diverted by the arc 311211. The water flow shunted by the arc 311211 passes through the filter plate 31122 to realize the filtration of water flow, do benefit to the water heater complete machine water route of purification, prolong water heater life, provide high-quality bathing water simultaneously. Water can also enter the inner cavity of the first filter element 3112 through the water inlet 3112111 and pass through the filter plate 31122 to achieve filtration of the water flow. Specifically, the arc 311211 sets up vertically in the upper surface of filter 31122, is equipped with a plurality of first filtration pores 311221 on the filter 31122. The first filter cartridge 3112 further includes a flow guide plate 311212 disposed on both sides of the curved plate 311211, and the two flow guide plates 311212 and the curved plate 311211 are sequentially connected and enclose to form the filter cartridge 31121. Water flow enters the inner cavity of the filter cartridge 31121 through the water inlet 3112111 to filter the bath water, materials such as medical stone, mineral stone and the like which can purify or strengthen the water quality can be placed in the filter cartridge 31121, and the water can strengthen the filtering function of the filter cartridge 31121. Specifically, the cross section of protrusion 31113 matches with the cross section of cartridge filter 31121, and protrusion 31113 can imbed first filter core 3112, and in the rotatory in-process of first filter core 3112, positioning seat 3111 rotates along with it to realize the intercommunication and the closure of intake route. First filter core 3112 includes solid fixed ring 31123, and embedded groove 31115 is seted up to the lower tip of positioning seat 3111, and gu fixed ring 31123's upper end embedded groove 31115 for positioning seat 3111 and first filter core 3112 enclose to close and form first filter chamber. Through the cooperation formation first filter chamber of solid fixed ring 31123 and embedded groove 31115, rivers pass through second water inlet 31114 and get into first filter chamber and filter, prevent that rivers from directly flowing into in the clearance between filter element subassembly 3 and the casing 1, can't realize the filtration to the bathing water.

The filter element subassembly includes second filter core 3121, and second filter core 3121 is through the first filter core 3112 of solid fixed ring 31123 embedding, and second filter core 3121 and first filter core 3112 intercommunication, and rivers are shunted, are filtered and are exported through delivery port 12 after second filter core 3121 filters through first filter core 3112. The rivers are shunted, are filtered and are filtered through second filter core 3121 through first filter core 3112, can reduce the noise in the water heater water route to through twice filtration, strengthen the filter effect to rivers, greatly improve the quality of water of bathing water in the water heater, improve user experience.

The second filter element 3121 is tubular, and a plurality of second filter holes 31211 are provided on the side wall of the second filter element 3121, the second filter holes 31211 are communicated with the water outlet 12.

The cartridge assembly 3 further includes a cartridge base 32, and the second cartridge 3121 is inserted into the cartridge base 32. When the user pressed filter core base 32, positioning seat 3111 can break away from with filter element group spare 3, promptly when dragging out filter core base 32, positioning seat 3111, first filter core 3112 and second filter core 3121 can break away from casing 1 along with filter core base 32, and the user of being convenient for dismantles the change to first filter core 3112 and second filter core 3121, and the user dismantles conveniently.

First recess 13 is seted up to casing 1 inner wall, and first recess 13 communicates with casing 1's lower terminal surface, and the lateral wall of filter core base 32 is equipped with connecting portion 321, and connecting portion 321 is gliding in first recess 13 along filter element group spare 3's the gliding in-process of pressing the direction, and filter element group spare 3 is connected or breaks away from with auto-lock push type switch 2. After a user presses the filter element assembly 3, the connecting part 321 slides in the first groove 13 along the pressing direction of the filter element assembly 3, the self-locking pressing type switch 2 can be separated from the filter element assembly 3, and the filter element assembly 3 can be pulled out; after the user washs filter element group spare 3, can directly fill filter element group spare 3 in casing 1, connecting portion 321 slides along filter element group spare 3's the direction of pressing in first recess 13, and auto-lock push type switch 2 can be connected with filter element group spare 3 for the filter equipment of water heater is in operating condition, and the water heater can continue normal use, and the user can easily take out filter element group spare 3 by oneself and clean. In addition, the first groove 13 is communicated with the lower end face of the housing 1, and the filter element assembly 3 can smoothly enter or leave the housing 1.

In some embodiments, the inner wall of the housing 1 further defines a second groove 14, the second groove 14 is communicated with the first groove 13, and the connecting portion 321 can rotate from the first groove 13 to the second groove 14 along with the rotation of the filter cartridge base 32, so that the filter cartridge base 32 can be fixed with the housing 1. Rotatory filter element group spare 3 makes connecting portion 321 move to second recess 14 from first recess 13, and connecting portion 321 is in the operating region, and filter element group spare 3 is whole to be in the fixed state, and filter element group spare 3 can't reciprocate, and second water inlet 31114 and first water inlet 11 intercommunication for the filter equipment of water heater is in operating condition. Rotating the filter element assembly 3 causes the connecting portion 321 to move from the second groove 14 to the first groove 13, the connecting portion 321 being in a detachable area, the filter element assembly 3 being in an active state as a whole, the filtering device for a water heater being in a non-operating state, the water inlet path being closed, and the filter element assembly 3 being able to be detached from the housing 1. The bearing capacity of the filtering device for the water heater can be ensured by the matching of the filter element base 32 and the shell 1 through the connecting part 321. When the filter element assembly 3 is connected with the self-locking pressing type switch 2, the filter element base 32 is partially arranged outside the shell 1. When the user need be dismantled filter element group spare 3, press filter element group spare 3 and make filter element group spare 3 break away from with auto-lock push type switch 2, because casing 1 is arranged in to filter core base 32 part is external, the user of being convenient for extracts filter element group spare 3, need not to stretch into casing 1 and extract filter element group spare 3 again.

Auto-lock push type switch 2 includes hasp shell 21, elastic component 22 and buckle 23, and the lateral wall of hasp shell 21 sets up guide rail 211, and buckle 23 includes the slider with guide rail 211 adaptation, realizes the slip of slider in guide rail 211 through pressing down elastic component 22 for buckle 23 can with filter element group spare 3 joint or break away from. Guide rail 211 has primary importance and second place, and primary importance is located the top of second place, realizes the slider switching between primary importance and second place through pressing elastic component 22, and the slider slides to primary importance, and the opening of buckle 23 diminishes, and buckle 23 can with the joint portion 31112 joint in positioning seat 3111, and the slider slides to the second place, and buckle 23's opening grow, and buckle 23 can break away from filter element subassembly 3.

Specifically, joint portion 31112 at positioning seat 3111 top is a circular arch, and the slider slides to the primary importance, and the opening of buckle 23 diminishes, and buckle 23 can slide to the second place with protruding joint, slider, buckle 23's opening grow, and buckle 23 can break away from filter element group spare 3.

A sealing ring 5 is arranged between the filter element base 32 and the shell 1, a sealing groove 323 is formed in the outer wall of the filter element base 32, and the sealing ring 5 is arranged in the sealing groove 323. The sealing ring 5 is arranged between the filter element base 32 and the shell 1, so that the condition of water leakage of the filtering device for the water heater can be reduced or avoided.

The embodiment of the utility model provides a water heater, water heater include as above-mentioned arbitrary embodiment a filter equipment for water heater, the lower tip of casing 1 is installed on the bottom plate of water heater, is equipped with the through hole on the bottom plate, and filter element group spare 3 can pass the through hole and the part stretches out the bottom plate. Filter element group spare 3 can be through pressing the realization with being connected of auto-lock push type switch 2, filter element group spare 3 filters the rivers through casing 1. Filter element group spare 3 can realize breaking away from with auto-lock push type switch 2 through pressing, and the user can easily take out filter element group spare 3 from the water heater and clean through pressing filter element group spare 3, and filter element group spare 3 is filled in or is taken out through the through hole, and convenient operation is dismantled and is washd convenience for the user to filter element group spare 3.

When filter element group spare 3 need be dismantled, filter element group spare 3 is rotated for connecting portion 321 moves to first recess 13 from second recess 14, and connecting portion 321 moves to the space of can pressing promptly, and first water inlet 11 and second water inlet 31114 stagger this moment, and the water inlet is sealed, presses filter element group spare 3, and filter element group spare 3 breaks away from with auto-lock push type switch 2, and the user can take filter element group spare 3 out from casing 1. After filter element group spare 3 washs or changes, fills in filter element group spare 3 casing 1 to make connecting portion 321 aim at first recess 13, press filter element group spare 3, filter element group spare 3 is connected with auto-lock push type switch 2, rotatory filter element group spare 3, make connection structure 322 move to second recess 14 from first recess 13, the unable up-and-down motion of connecting portion 321, accomplish the installation, first water inlet 11 and second water inlet 31114 intercommunication this moment, the water inlet is opened.

Example 2

The utility model provides a front-mounted filter device, as shown in figures 4-10. The front-mounted filter device comprises a shell 1, a connecting plate 4 and a filter element assembly 3. Filter element group spare 3 and 1 sealing connection of casing and form the filter chamber, and the water that gets into the filter chamber exports casing 1 after 3 filtration of filter element group spare, and filter element group spare 3 filters the rivers through casing 1, reduces the sediment of impurity in the water heater pipeline, improves quality of water. The housing 1 includes a guide groove 15 provided at a first end surface thereof and a first snap portion 1521 provided in the guide groove 15. Connecting plate 4 can be dismantled with casing 1 and be connected, and connecting plate 4 passes through bolted connection with casing 1 and realizes dismantling the connection, and connecting plate 4 is including its conduction groove 41 of terminal surface about the intercommunication. Filter element group spare 3 includes connection structure 322, and connection structure 322 is spacing in guide way 15 by connecting plate 4, and connection structure 322 and first joint portion 1521 joint, connection structure 322 can be fixed in guide way 15 and with first joint portion 1521 joint promptly. The connecting structure 322 is controlled to move along the guiding groove 41 to enter or leave the guiding groove 15, and the connecting structure 322 is rotated to be clamped with or released from the first clamping portion 1521. When the connecting structure 322 is clamped with the first clamping portion 1521, the filter element assembly 3 is fixed with the housing 1, and the front-mounted filter device is in a working state; rotatory filter element group spare 3 makes connection structure 322 break away from with first joint portion 1521, and filter element group spare 3 breaks away from casing 1, and convenience of operation is washd, convenient to use dismantles filter element group spare 3. After the filter element assembly 3 is replaced, the whole water path of the water heater can be purified, the service life of the water heater can be prolonged, and high-quality bath water can be provided. In addition, the connecting plate 4 is provided with the conducting groove 41 which is communicated with the upper end surface and the lower end surface, and the guide groove 15 which is arranged on the first end surface is processed in the shell 1, so that the processing difficulty is low, and the processing is convenient.

The shell 1 comprises a first water inlet 11 and a water outlet 12, the first water inlet 11 is connected with the water outlet end of a water pump of the water heater, the water outlet 12 is connected with the water inlet end of the heat exchanger, and water entering the filter cavity from the first water inlet 11 is filtered by the filter element assembly 3 and then is discharged through the water outlet 12. The water that the water pump goes out water end gets into the filter chamber from first water inlet 11 is discharged through delivery port 12 after filtering through filter element group spare 3, and filter element group spare 3 filters the rivers through casing 1, reduces the sediment of impurity in the water heater pipeline, improves quality of water.

The connecting plate 4 includes the first spacing portion 42 that sets up at the conduction groove 41 tip, and when the connection structure 322 and first joint portion 1521 joint, first spacing portion 42 can retrain the downward displacement of connection structure 322 in the guide way 15. First spacing portion 42 is protruding inwards relative to guide way 15, and when connection structure 322 rotated in guide way 15 and first joint portion 1521 joint, connection structure 322 can be held to first spacing portion 42, prevents the relative casing 1 downstream of connection structure 322 for filter element subassembly 3 is fixed on casing 1.

The connecting structure 322 includes a second position-limiting portion 3221 and a second clamping portion 3222, the second position-limiting portion 3221 is connected to the second clamping portion 3222, the second position-limiting portion 3221 enters the guide groove 15 by rotating the connecting structure 322, and the second clamping portion 3222 can be clamped with the first clamping portion 1521. Set up second joint portion 3222 on the spacing portion 3221 of second, second joint portion 3222 gets into guide way 15 along with the spacing portion 3221 of second to can realize with the joint of first joint portion 1521, through the joint cooperation, make filter element group spare 3 fixed mounting at casing 1, fixed effectual.

The filter element assembly 3 comprises a filter element main body 31 and a filter element base 32, wherein the filter element main body 31 is inserted into the filter element base 32. Rotatory filter element group spare 3 makes connection structure 322 break away from with first joint portion 1521, at the in-process of extracting filter core base 32, and filter core main part 31 can break away from casing 1 thereupon to the realization is to the dismantlement or the change of filter core main part 3, need not to stretch into casing 1 again and takes out filter core main part 31.

The outer side wall of the filter element base 32 is provided with a connecting structure 322, and when the connecting structure 322 is clamped with the first clamping portion 1521, the filter element base 32 is partially externally arranged on the casing 1. When the user need be dismantled filter element group spare 3, rotatory filter element group spare 3 makes connection structure 322 break away from with first joint portion 1521 to dismantle filter element group spare 3, because casing 1 is arranged in to filter core base 32 part is external, the outer rotatory filter element group spare 3 of user's casing 1 of being convenient for and extract it, need not to stretch into casing 1 and rotatory filter element group spare 3 again, convenient operation.

The cartridge body 31 includes a primary filter portion 311 and a secondary filter portion 312, the primary filter portion 311 includes a second water inlet 31114 and an arcuate plate 311211, the arcuate plate 311211 is located at a position of the primary filter portion 311 near the second water inlet 31114, and the arcuate plate 311211 is used to divert water entering through the second water inlet 31114. Wherein, when the preposed filtering device is in a working state: the first water inlet 11 is communicated with the second water inlet 31114, and the water flow is divided and filtered by the first-stage filter part 311, and is output through the water outlet 12 after being filtered by the second-stage filter part 312.

In this embodiment, in a first aspect, a water flow flowing out from a water outlet end of the water pump enters the primary filtering portion 311 through the first water inlet 11, and the arc-shaped plate 311211 divides the water flow entering the second water inlet 31114, so as to reduce water flow noise in the water heater and improve user experience; in the second aspect, when the front-mounted filtering device works, water flow is sequentially filtered by the first-stage filtering part 311 and the second-stage filtering part 312, and then is output through the water outlet 12, so that the filtering effect on the water flow is enhanced through twice filtering, and the water quality of bath water in the water heater is greatly improved.

First-stage filter portion 311 includes first filter core 3112, and first filter core 3112 includes filter 31122 and arc 311211, and arc 311211 sets up in the upper surface of filter 31122, and filter 31122 is used for filtering the water of being shunted by arc 311211, is equipped with a plurality of first filtration pores 311221 on the filter 31122. The water flow shunted by the arc 311211 passes through the filter plate 31122 to realize the filtration of water flow, do benefit to the water heater complete machine water route of purification, prolong water heater life, provide high-quality bathing water simultaneously. Water can also enter the inner cavity of the first filter element 3112 through the water inlet 3112111 and pass through the filter plate 31122 to achieve filtration of the water flow. Specifically, the curved plate 311211 is disposed vertically on the upper surface of the filter plate 31122.

First filter core 3112 still includes the drainage plate 311212 that sets up in the both sides of arc 311211, and two drainage plates 311212 and arc 311211 are connected in order and are enclosed and close formation cartridge filter 31121, and seted up inlet opening 3112111 on arc 311211, and cartridge filter 31121's inner chamber can communicate through inlet opening 3112111 and second water inlet 31114, and cartridge filter 31121's inner chamber can communicate with second grade filter portion 312 through filter 31122. Water flow enters the inner cavity of the filter cartridge 31121 through the water inlet holes 3112111 to realize the filtration of the water flow, materials which can purify or strengthen the water quality such as medical stone, mineral stone and vitamin C can be placed in the filter cartridge 31121, and the water can strengthen the filtration function of the filter cartridge 31121. The water filtered by the filter cartridge 31121 flows into the secondary filter 312 to realize the secondary filtration of the water flow, thereby greatly improving the quality of the bath water in the water heater.

The side wall of the positioning seat 3111 is provided with a second water inlet 31114, the inner wall of the positioning seat 3111 has a protrusion 31113, and the protrusion 31113 can be embedded into the first filter element 3112. First filter core 3112 includes solid fixed ring 31123, and embedded groove 31115 is seted up to the lower tip of positioning seat 3111, and gu fixed ring 31123's upper end embedded groove 31115 for positioning seat 3111 and first filter core 3112 enclose to close and form first filter chamber.

The secondary filter portion 312 includes the second filter element 3121, and the second filter element 3121 is embedded into the first filter element 3112, and the second filter element 3121 is communicated with the first filter element 3112, and rivers are shunted, are filtered and are exported through delivery port 12 after the second filter element 3121 filters through the first filter element 3112. The first filter element 3112 can be detached from the housing 1 along with the second filter element 3121, without taking out each part of the filter element assembly 3 one by one, which is convenient for users to disassemble and has high disassembling efficiency.

The front-mounted filter device comprises a self-locking pressing switch 2, the self-locking pressing switch 2 is installed on a shell 1, and a filter element assembly 3 is arranged to be connected with and separated from the self-locking pressing switch 2 through pressing. Filter element group spare 3 can be through pressing the realization with being connected of auto-lock push type switch 2, and filter element group spare 3 filters the rivers through casing 1, reduces the sediment of impurity in the water heater pipeline, improves quality of water. Filter element group spare 3 can be through pressing the realization and breaking away from with auto-lock push type switch 2, press filter element group spare 3 and can make it break away from with the auto-lock push type switch 2 of installing in casing 1, the user can easily take out filter element group spare 3 and clean through pressing filter element group spare 3, and convenience of operation is washd to convenience of customers dismantlement filter element group spare 3.

Auto-lock push switch 2 includes hasp shell 21, elastic component 22 and buckle 23, and the lateral wall of hasp shell 21 sets up guide rail 211, and buckle 23 includes the slider with guide rail 211 adaptation, realizes the slip of slider in guide rail 211 through pressing down elastic component 22 for buckle 23 can with the joint portion 31112 joint in positioning seat 3111 with break away from.

In some embodiments, the guide groove 15 includes a first guide groove 151 and a second guide groove 152, the first guide groove 151 communicates with the second guide groove 152, and a first clamping portion 1521 is disposed in the second guide groove 152 and moves from the first guide groove 151 to the second guide groove 152 by rotating the connection structure 322. In the process of the user rotating the filter element assembly 3, the connecting structure 322 can enter or exit the second guide groove 152 to realize the joint of the first joint part 1521 and the filter element assembly 3 and the separation, so that the user can install and detach the filter element assembly 3 conveniently. The first clamping portion 1521 is a protrusion or a groove, and is used for connecting with the second clamping portion 3222 on the connecting structure 322. Set up arch or recess in guide way 15 to can realize the joint of first joint portion 1521 and second joint portion 3222, the processing of being convenient for, and the processing cost is lower.

Specifically, first joint portion 1521 is the arc arch, and filter core base 32 lateral wall sets up the flange and forms connection structure 322, sets up the arc recess on the connection structure 322 and forms second joint portion 3222, and when first joint portion 1521 and second joint portion 3222 joint, filter element subassembly 3 was fixed in casing 1. When the filter element assembly 3 needs to be disassembled, the filter element assembly 3 is rotated to make the first clamping portion 1521 separate from the second clamping portion 3222, and the connecting structure 322 can be rotated to enter the first guide groove 151 and be taken out of the conduction groove 41.

A sealing ring 5 is arranged between the filter element base 32 and the shell 1, a sealing groove 323 is formed in the outer wall of the filter element base 32, and the sealing ring 5 is arranged in the sealing groove 323. And a sealing ring 5 is arranged between the filter element base 32 and the shell 1, so that the condition of water leakage of a front-mounted filtering device can be reduced or avoided.

The embodiment of the utility model provides a water heater, water heater include as above-mentioned arbitrary embodiment forward type filter equipment.

When filter element group spare 3 need be dismantled, rotatory filter element group spare 3, make connection structure 322 move to first guide way 151 from second guide way 152, connection structure 322 moves to the space of can pressing promptly, first water inlet 11 and second water inlet 31114 stagger this moment, the water inlet is sealed, press filter element group spare 3, filter element group spare 3 breaks away from with auto-lock push type switch 2, the user can aim at the conduction groove 41 in the connecting plate 4 with connection structure 322, connection structure 322 can be taken out from conduction groove 41, the user can take out filter element group spare 3 from casing 1. Wash filter element group spare 3 or change the back, fill in filter element group spare 3 casing 1, and make connection structure 322 aim at conduction groove 41, press filter element group spare 3, filter element group spare 3 is connected with auto-lock push type switch 2, rotatory filter element group spare 3, make connection structure 322 move to second guide way 152 from first guide way 151, second joint portion 3222 is fixed with first joint portion 1521 joint, accomplish the installation, first water inlet 11 and second water inlet 31114 intercommunication this moment, the water inlet is opened.

Example 3

An embodiment of the present invention provides a filter device for a water heater front end, as shown in fig. 5, 11 and 12. The filter assembly for the front end of a water heater comprises a housing 1 and a filter cartridge assembly 3. A first water inlet 11 and a water outlet 12 are arranged on the shell 1, the first water inlet 11 is connected with the water outlet end of a water pump of the water heater, and the water outlet 12 is connected with the water inlet end of the heat exchanger. The filter element assembly 3 is detachably and hermetically connected with the housing 1, the filter element assembly 3 comprises a primary filter portion 311 and a secondary filter portion 312, the primary filter portion 311 comprises a second water inlet 31114 and an arc-shaped plate 311211, the arc-shaped plate 311211 is located at a position of the primary filter portion 311 close to the second water inlet 31114, and the arc-shaped plate 311211 is used for dividing water entering through the second water inlet 31114. Wherein, when being used for the filter equipment of water heater front end in operating condition: the first water inlet 11 is communicated with the second water inlet 31114, and the water flow is divided and filtered by the first filtering portion 311, and is outputted through the water outlet 12 after being filtered by the second filtering portion 312.

In this embodiment, in a first aspect, a water flow flowing out from a water outlet end of the water pump enters the primary filtering portion 311 through the first water inlet 11, and the arc-shaped plate 311211 divides the water flow entering the second water inlet 31114, so as to reduce water flow noise in the water heater and improve user experience; in the second aspect, when the filter device for the front end of the water heater works, water flow is sequentially filtered by the first-stage filter part 311 and the second-stage filter part 312, and then is output through the water outlet 12, so that the filter effect on the water flow is enhanced through twice filtering, and the water quality of bath water in the water heater is greatly improved.

The primary filter portion 311 includes a first filter element 3112, the first filter element 3112 includes a filter plate 31122 and an arc 311211, the arc 311211 is disposed on an upper surface of the filter plate 31122, and the filter plate 31122 is used for filtering water shunted by the arc 311211. The water flow shunted by the arc 311211 passes through the filter plate 31122 to realize the filtration of water flow, do benefit to the water heater complete machine water route of purification, prolong water heater life, provide high-quality bathing water simultaneously. Water can also enter the inner cavity of the first filter element 3112 through the water inlet 3112111 and then pass through the filter plate 31122 to achieve the filtering of the water flow. Specifically, the arc 311211 is vertically disposed on the upper surface of the filter plate 31122.

First filter core 3112 still includes the drainage plate 311212 that sets up in the both sides of arc 311211, and two drainage plates 311212 and arc 311211 are connected in order and are enclosed and close formation cartridge filter 31121, and seted up inlet opening 3112111 on arc 311211, and cartridge filter 31121's inner chamber can communicate through inlet opening 3112111 and second water inlet 31114, and cartridge filter 31121's inner chamber can communicate with second grade filter portion 312 through filter 31122. Water flow enters the inner cavity of the filter cartridge 31121 through the water inlet 3112111 to filter the bath water, materials such as medical stone, mineral stone and the like which can purify or strengthen the water quality can be placed in the filter cartridge 31121, and the water can strengthen the filtering function of the filter cartridge 31121. The water filtered by the filter cartridge 31121 flows into the secondary filter 312 again to re-filter the water, thereby enhancing the effect of filtering the bath water.

The filter plate 31122 is provided with a plurality of first filter holes 311221. The water in the filter cartridge 31121 enters the secondary filter portion 312 through the first filter holes 311221 in the filter plate 31122, and the filter plate 31122 is provided with through holes as the first filter holes 311221, so that the filter cartridge is convenient to process.

The cross-sectional width of the filter cartridge 31121 is gradually reduced from both ends of the arc-shaped plate 311211 in a direction away from the second water inlet 31114. The cross-section of the filter cartridge 31121 is wedge-shaped, which greatly reduces the noise of the water stream exiting the water outlet end of the pump.

The primary filter portion 311 includes a positioning seat 3111, the outside wall of the positioning seat 3111 is closely attached to the inside wall of the housing 1, the side wall of the positioning seat 3111 is provided with a second water inlet 31114, the positioning seat 3111 is arranged in the filter cartridge 31121, and the positioning seat 3111 and the filter plate 31122 are enclosed to form a first filter chamber. Rivers loop through first water inlet 11, second water inlet 31114 and get into first filter chamber and filter, and the outside lateral wall of positioning seat 3111 closely laminates with the inside lateral wall of casing 1, prevents that rivers from directly flowing into the clearance between filter element subassembly 3 and the casing from first water inlet 11, can't realize the filtration to the bathing water.

The inner wall of the positioning seat 3111 has a protrusion 31113, and the protrusion 31113 can be embedded in the filter cartridge 31121. The protrusion 31113 is embedded in the filter cartridge 31121, so that during the rotation of the filter core assembly 3, the positioning seat 3111 rotates along with the filter core assembly to realize the communication and the sealing of the water inlet passage. When the filter device for water heater front end is in operating condition, rotatory filter element group spare 3 makes second water inlet 31114 and first water inlet 11 communicate, and when the filter device for water heater front end is in non-operating condition, rotatory filter element group spare 3 makes second water inlet 31114 and first water inlet 11 to become certain angle, and the water inlet is sealed. The water inlet passage in the filtering device used for the front end of the water heater is controlled to be communicated and sealed by rotating the filter element component 3, so that the operation of a user is convenient, and the time and the labor are saved.

The periphery side of filter 31122 sets up fixed ring 31123, and the embedded groove 31115 is seted up to the lower tip of positioning seat 3111, and the upper end embedded groove 31115 of fixed ring 31123, the lower extreme and the gomphosis of second grade filter portion 312 of fixed ring 31123. The rivers pass through second water inlet 31114 and get into first filter chamber and filter, and the upper end embedding positioning seat 3111 of solid fixed ring 31123 prevents during rivers directly flow in the space between filter element group spare 3 and the casing from the clearance between filter 31122 and the positioning seat 3111, can't realize the filtration to the bathing water.

The secondary filter portion 312 includes a second filter element 3121, the second filter element 3121 is provided in a tubular shape, the second filter element 3121 is fitted to the fixing ring 31123, the second filter element 3121 is fitted into the primary filter portion 311, and the primary filter portion 311 can be mounted and dismounted together with the secondary filter portion 312. And a plurality of second filtering holes 31211 are arranged on the side wall of the second filter element 3121, and the second filtering holes 31211 are communicated with the water outlet 12. The water flow flows into the second filter element 3121 from the primary filter portion 311 to be filtered, the second filter element 3121 can be filled with filter materials such as PP cotton to purify water, the water flow filtered by the second filter element 3121 flows to the water outlet 12 through the second filter holes 31211, and is output through the water outlet 12, so as to purify and filter the bath water.

Specifically, the second filter element 3121 employs a stainless steel screen.

Filter element group spare 3 still includes filter core base 32, and second grade filter portion 312 is pegged graft in filter core base 32, and the inside wall of casing 1 and the lateral wall threaded connection of filter core base 32. Rotating filter core base 32 can realize being connected and breaking away from between second grade filter house 312 and the casing 1, and second grade filter house 312 embedding one-level filter house 311, filter element group spare 3 can be connected and break away from with casing 1, and convenience of customers dismantles filter element group spare 3 and washs or changes. In addition, the threads are processed on the inner side wall of the shell 1 and the outer side wall of the filter element base 32 to realize threaded connection of the two, so that the production process is low in difficulty and convenient to process. The filter element base 32 and the shell 1 are connected by threads, so that the bearing capacity of the filter device for the front end of the water heater can be ensured.

In some embodiments, a sealing ring 5 is disposed between the filter element base 32 and the housing 1, a sealing groove 323 is disposed on an outer wall of the filter element base 32, and the sealing ring 5 is disposed in the sealing groove 323. The sealing ring 5 is arranged between the filter element base 32 and the shell 1, so that the situation of water leakage of the filtering device at the front end of the water heater can be reduced or avoided, and the integral pressure bearing capacity of the filtering device at the front end of the water heater can be improved. When the filter device for the front end of a water heater is in operation, the filter element base 32 is partially external to the housing 1. When the user need be dismantled filter element group spare 3, rotatory filter element base 32 makes filter element group spare 3 break away from with casing 1, because casing 1 is arranged in to filter element base 32 part is external, and the user of being convenient for need not to stretch into casing 1 and rotate filter element group spare 3 again and take out it at casing 1 external rotation filter element group spare 3, has improved user experience greatly and has felt.

The filtering apparatus for the front end of a water heater has an operating state and a non-operating state, and when the filtering apparatus for the front end of a water heater is in the non-operating state, the rotational movement of the positioning seat 3111 can stagger the first water inlet 11 and the second water inlet 31114. The rotary filter element component 3 can realize the sealing of a water inlet channel in the filter device at the front end of the water heater, and is convenient for users to operate. When the filter device for the front end of the water heater needs to be used, the rotary motion of the rotary filter element assembly 3 and the positioning seat 3111 can make the first water inlet 11 communicate with the second water inlet 31114, so that the filter device for the front end of the water heater is in a working state.

The embodiment of the utility model provides a water heater, water heater include as above-mentioned arbitrary embodiment a filter equipment for water heater front end, the lower tip of casing 1 is installed on the bottom plate of water heater, is equipped with the through hole on the bottom plate, and filter element group spare 3 can pass the through hole and the part stretches out the bottom plate. Filter element group spare 3 can realize breaking away from with casing 1 through the rotation, and the user is rotatory to be pressed filter element group spare 3 and can easily take out filter element group spare 3 from the water heater and clean, and filter element group spare 3 is plugged in or is taken out through the through hole, and convenience of operation is washd, convenient operation to filter element group spare 3 to the convenience of customers dismantlement.

When filter element group spare 3 was dismantled to needs, rotatory filter element group spare 3 removed the threaded connection relation between casing 1 and the filter element group spare 3, and the user can take out filter element group spare 3. Wash filter element group spare 3 or change the back, fill in filter element group spare 3 casing 1, rotatory filter element group spare 3, threaded connection between casing 1 and the filter element group spare 3 is in order to realize filter element group spare 3 and casing 1's fixed, accomplishes the installation, and first water inlet 11 and second water inlet 31114 intercommunication this moment, the water inlet is opened.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A filter assembly for a water heater front end, the filter assembly comprising:

the water inlet and the water outlet are arranged on the shell;

2. The filter assembly for a front end of a water heater as recited in claim 1, wherein said primary filter portion includes a first filter element, said first filter element including a filter plate and said arcuate plate, said arcuate plate being disposed on an upper surface of said filter plate, said filter plate being adapted to filter water diverted by said arcuate plate.

3. The filter device for the front end of the water heater according to claim 2, wherein the first filter element further comprises flow guide plates disposed at two sides of the arc-shaped plate, the two flow guide plates and the arc-shaped plate are sequentially connected and enclose to form a filter cartridge, a water inlet hole is formed in the arc-shaped plate, an inner cavity of the filter cartridge can be communicated with the second water inlet through the water inlet hole, and an inner cavity of the filter cartridge can be communicated with the secondary filter part through the filter plate.

4. The filter assembly for a front end of a water heater as recited in claim 3, wherein said filter panel has a plurality of first filter openings therein.

5. The filter assembly for a front end of a water heater of claim 3, wherein the cross-sectional width of the filter cartridge is gradually reduced from both ends of the arc-shaped plate to a direction away from the second water inlet.

6. The filter assembly of claim 3, wherein the primary filter portion includes a positioning seat, an outer sidewall of the positioning seat is closely attached to an inner sidewall of the housing, a sidewall of the positioning seat is provided with the second water inlet, the filter cartridge is disposed in the positioning seat, and the positioning seat and the filter plate enclose to form a first filter chamber.

7. The filter assembly for the front end of a water heater of claim 6, wherein the inner wall of the spud has a protrusion that can be inserted into the filter cartridge.

8. The filter unit for the front end of a water heater as claimed in claim 6, wherein a fixing ring is provided at the outer circumference side of the filter plate, an insertion groove is provided at the lower end of the positioning seat, the upper end of the fixing ring is inserted into the insertion groove, and the lower end of the fixing ring is inserted into the secondary filter part.

9. The filter device for the front end of the water heater as recited in claim 8, wherein the secondary filter portion comprises a second filter element, the second filter element is arranged in a tubular shape, the second filter element is embedded with the fixing ring, a plurality of second filter holes are arranged on the side wall of the second filter element, and the second filter holes are communicated with the water outlet.

10. The filter assembly for the front end of a water heater of claim 6, wherein the filter element assembly further comprises a filter element base, the secondary filter portion is inserted into the filter element base, and the inner side wall of the housing is in threaded connection with the outer side wall of the filter element base.

11. The filter device for the front end of a water heater as recited in claim 10, wherein a seal ring is disposed between said filter element base and said housing, a seal groove is disposed on an outer wall of said filter element base, and said seal ring is disposed in said seal groove;

12. The filter assembly for a front end of a water heater of any one of claims 6 to 11, wherein the filter assembly for a front end of a water heater has the active state and an inactive state, and wherein the rotational movement of the positioning socket causes the first water inlet to be misaligned with the second water inlet when the filter assembly for a front end of a water heater is in the inactive state.

13. A water heater comprising a filter unit for the front end of a water heater according to any one of claims 1 to 12, the lower end of the housing being mounted on a base plate of the water heater, the base plate being provided with a through-hole through which the filter element assembly can pass and partially protrude from the base plate.