CN214972305U - Front filter - Google Patents

Abstract

The utility model discloses a leading filter, including the inside casing that is equipped with the filter chamber, be equipped with on the casing with the water inlet and the delivery port of filter chamber intercommunication, be equipped with vortex mechanism in the filter chamber and be located the first filtering mechanism between water inlet and the delivery port, vortex mechanism receives the rivers impact of filter chamber and takes place to rotate to it flows to the delivery port through first filtering mechanism to drive rivers. The utility model discloses a be equipped with vortex mechanism and first filtering mechanism in the inside of filter chamber for rivers from the water inlet get into after the filter chamber, strike vortex mechanism, vortex mechanism carries out vortex and guide to rivers, it flows to the delivery port to drive rivers, because the water in the filter chamber is at the in-process that flows to the delivery port, can filter through first filtering mechanism, make leading filter can filter the rivers that are about to flow tap, prevent that the rivers that flow in the tap from containing large granule impurity, improve the quality of water of tap outflow rivers.

Description

Front filter

Technical Field

The utility model belongs to the filter field, concretely relates to leading filter.

Background

At present, it is relatively poor to lead to quality of water because of containing certain large granule impurity (rust, silt, xiao chong etc.) in the running water that enters into user's family through the running water pipe-line, if the user directly drinks, then leads to the emergence of disease easily, if the user sets up the purifier at home and purifies tap water that flows out, then the large granule impurity in the rivers can seriously shorten the life of filter core, solenoid valve and booster pump etc..

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a preposed filter is provided to solve at least one of above-mentioned problem.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a pre-filter, includes the inside casing that is equipped with the filter chamber, is equipped with water inlet and the delivery port that communicates with the filter chamber on the casing, is equipped with vortex mechanism and is located the first filtering mechanism between water inlet and the delivery port in the filter chamber, and vortex mechanism receives the rivers impact of filter chamber and takes place to rotate to drive rivers and flow to the delivery port through first filtering mechanism.

In the above prefilter, the first filter mechanism divides the filter chamber into a water inlet chamber communicated with the water inlet and a water outlet chamber communicated with the water outlet, and the turbulence mechanism is arranged in the water inlet chamber.

In the above pre-filter, the water outlet cavity is arranged at the upper part of the water inlet cavity, the water inlet cavity is also internally provided with a second filtering mechanism, and the second filtering mechanism is arranged at the lower part of the turbulent flow mechanism and forms a collecting cavity for collecting impurities with the bottom of the shell.

In above-mentioned leading filter, the second filtering mechanism is the division board, is equipped with bar hole and filtration pore on the division board, and vortex mechanism drives rivers and gets into the collection chamber through bar hole and flow out of collection chamber in order to stay impurity in the collection chamber by the filtration pore.

In the prefilter, a plurality of strip-shaped holes are arranged and distributed along the radial direction of the partition plate.

In the above-mentioned leading filter, still be equipped with the direction muscle that is located the upper portion of bar hole on the division board, the slope of direction muscle sets up.

In above-mentioned leading filter, vortex mechanism includes the pivot and a plurality of blade that link to each other with the pivot with the coaxial setting of filter chamber, and the pivot is installed on the division board, and the lateral part of casing is located to the water inlet, and the water inlet towards blade eccentric settings.

In the front filter, a drain outlet communicated with the collecting cavity is arranged at the bottom of the shell, and a drain valve for opening and closing the drain outlet is arranged on the drain outlet.

In the prefilter, the housing comprises an upper housing and a lower housing which are detachably connected, and the upper housing covers the lower housing to form a filter chamber for accommodating the first filter mechanism.

In above-mentioned leading filter, first filter mechanism locates in the lower casing, is equipped with the installation step that is used for supporting first filter mechanism on the inner wall of lower casing, and upward casing downwardly extending has the protruding muscle of installation, and the protruding muscle of installation offsets in order to press from both sides tight first filter mechanism with the installation step jointly with first filter mechanism's top.

The utility model has the advantages that:

the utility model provides a pre-filter, includes the inside casing that is equipped with the filter chamber, is equipped with water inlet and the delivery port that communicates with the filter chamber on the casing, is equipped with vortex mechanism and is located the first filtering mechanism between water inlet and the delivery port in the filter chamber, and vortex mechanism receives the rivers impact of filter chamber and takes place to rotate to drive rivers and flow to the delivery port through first filtering mechanism. The technical scheme has the following technical effects:

the utility model discloses a be equipped with vortex mechanism and first filter mechanism in the inside of filter chamber, make rivers get into after the filter chamber from the water inlet, can be under hydraulic effect, strike vortex mechanism, vortex mechanism receives the impact, take place to rotate, carry out vortex and guide to rivers, it flows to the delivery port to drive rivers, because first filter mechanism is located between water inlet and the delivery port, and separate the filter chamber, make the water of filter chamber at the in-process that flows to the delivery port, can filter through first filter mechanism, make the leading filter of connection on tap leading water route can filter the rivers that are about to flow tap, the rivers that prevent to flow among the tap contain large granule impurity, improve the quality of water of tap outflow rivers.

First filtering mechanism separates into the filter chamber with the intake antrum of water inlet intercommunication and with the play water cavity of delivery port intercommunication, the intracavity of intaking is located to vortex mechanism, because it is great to get into the rivers water pressure of the intracavity of intaking through the water inlet, so to be better to the vortex mechanism impact effect that is located the intracavity of intaking, the rotational speed of vortex mechanism can be improved in the impact of high strength, and then improve the vortex effect of vortex mechanism to rivers, make the whirl effect in the filter chamber better, finally improve the filter effect of first filtering mechanism to rivers.

The upper portion of intake antrum is located to the play water cavity, still be equipped with second filtering mechanism in the intake antrum, second filtering mechanism locates the lower part of vortex mechanism and forms the collection chamber of collecting impurity with the bottom of casing, the rivers that get into the intake antrum through the water inlet are under the effect of vortex mechanism, earlier to the collection chamber of the lower part of second filtering mechanism flow, then from collecting the chamber through the second filtering mechanism to the intake antrum flow of upper portion and stay the large granule impurity in order to realize once filtering in the collection intracavity, rivers flow through the play water cavity of first filtering mechanism to upper portion after that, and stay impurity in the lower part of first filtering mechanism in order to realize secondary filter, make through twice filterable rivers cleaner, guarantee that the quality of water of outflow preposition filter rivers is better.

The second filtering mechanism is the division board, is equipped with the bar hole on the division board and crosses the filtration pore, and vortex mechanism drives rivers and flows into through the bar hole and collect the chamber and flow out by crossing the filtration pore and collect the chamber in order to stay impurity in collecting the intracavity, and the bar hole is convenient for rivers and get into in a large amount fast and collect the intracavity, and the filtration pore blocks the large granule impurity in the rivers to stay large granule impurity in collecting the intracavity.

The bar hole is equipped with a plurality ofly, and a plurality of bar holes are along the radial distribution of division board for the rivers of whirl state can get into from a plurality of positions and collect the intracavity.

Still be equipped with the direction muscle that is located bar hole upper portion on the division board, the slope of direction muscle sets up, and guide rivers pass through the bar hole and get into the collection chamber, also can block the large granule impurity formation of collecting the intracavity, prevents that large granule impurity from getting into the intracavity of intaking.

The vortex mechanism includes the pivot and a plurality of blades that link to each other with the pivot with the coaxial setting of filter chamber, and the pivot is installed on the division board, and the lateral part of casing is located to the water inlet, and the water inlet towards blade eccentric settings for water flow direct impact blade and along filter chamber formation whirl in getting into the filter chamber through the water inlet, it is effectual to the promotion of vortex mechanism.

A drain outlet communicated with the collection cavity is formed in the bottom of the shell, a drain valve for opening and closing the drain outlet is mounted on the drain outlet, when the front filter works, the drain valve is closed, and large particle impurities are accumulated in a water inlet cavity at the lower part of the second filtering mechanism; pile up certain quantity when large granule impurity, when needing to carry out the blowdown clearance to leading filter, open the blowoff valve, the inside filter chamber of leading filter forms siphonage with the external world, the rivers that flow to the delivery port flow to originally flow to the drain backward flow, impurity carrying first filter mechanism lower part and the impurity of second filter mechanism lower part are jointly followed the drain and are discharged leading filter through the blowoff valve, the realization is to the backwash blowdown of first filter mechanism and second filter mechanism, guarantee leading filter's clean and filter effect.

The casing closes on the casing down in order to form the filter chamber that holds first filter mechanism including dismantling the last casing of connection and lower casing, goes up the casing lid, and when the user needs cleared up leading filter, the user can pull down last casing from the casing down to clear up respectively, can dismantle the last casing of connection and the casing operation of the user of being convenient for more down, reduce the clearance degree of difficulty.

The features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

Drawings

The invention will be further described with reference to the accompanying drawings and specific embodiments:

fig. 1 is a perspective view of a pre-filter according to the present invention;

FIG. 2 is a three-dimensional cut-away view of a pre-filter according to the present invention;

fig. 3 is a longitudinal cross-sectional view of a pre-filter of the present invention;

FIG. 4 is a cross-sectional view of the upper housing;

FIG. 5 is a cross-sectional view of the lower housing;

fig. 6 is a transverse cross-sectional view of a pre-filter of the present invention;

fig. 7 is a perspective view of the second filter mechanism.

Reference numerals:

100, arranging a shell on the shell, 110, and 120 installing convex ribs;

200, a lower shell, 210 a water inlet, 220 a sewage outlet, 230 a sewage valve, 240 a first mounting step and 250 a second mounting step;

300 filtering cavity, 310 water inlet cavity, 320 water outlet cavity and 330 collecting cavity;

400 a first filter mechanism;

500 second filtering mechanism, 510 strip-shaped holes, 520 filtering holes and 530 guiding ribs;

600 spoiler mechanisms, 610 pivot, 620 blade.

Detailed Description

The utility model provides a leading filter, including the inside casing that is equipped with the filter chamber, be equipped with on the casing with the water inlet and the delivery port of filter chamber intercommunication, be equipped with vortex mechanism in the filter chamber and be located the first filtering mechanism between water inlet and the delivery port, vortex mechanism receives the rivers impact of filter chamber and takes place to rotate to it flows to the delivery port through first filtering mechanism to drive rivers. The utility model discloses a be equipped with vortex mechanism and first filter mechanism in the inside of filter chamber, make rivers get into after the filter chamber from the water inlet, can be under hydraulic effect, strike vortex mechanism, vortex mechanism receives the impact, take place to rotate, carry out vortex and guide to rivers, it flows to the delivery port to drive rivers, because first filter mechanism is located between water inlet and the delivery port, and separate the filter chamber, make the water of filter chamber at the in-process that flows to the delivery port, can filter through first filter mechanism, make the leading filter of connection on tap leading water route can filter the rivers that are about to flow tap, the rivers that prevent to flow among the tap contain large granule impurity, improve the quality of water of tap outflow rivers.

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example (b):

a pre-filter, as shown in fig. 1 to 7, comprises a housing, a filter chamber 300 is arranged inside the housing, a water inlet 210 and a water outlet 110 which are communicated with the filter chamber 300 are also arranged on the housing, the pre-filter is used for being connected to a pre-water path of a faucet, so that water flows into the filter chamber 300 from the water inlet 210, flows out of the filter chamber 300 from the water outlet 110 after being filtered by the filter chamber 300, and finally flows out of the faucet. Be equipped with vortex mechanism 600 and first filter mechanism 400 in the inside of filter chamber 300, first filter mechanism 400 is located between water inlet 210 and the delivery port 110, and separate filter chamber 300, make the rivers that flow to delivery port 110 through water inlet 210 filter through first filter mechanism 400, when vortex mechanism 600 receives the rivers impact in filter chamber 300, can take place to rotate, pivoted vortex mechanism 600 disturbs the liquid in filter chamber 300, make the rivers in the filter chamber 300 produce the whirl effect, and drive rivers and flow to delivery port 110 through first filter mechanism 400, in order to filter rivers.

The utility model discloses a be equipped with vortex mechanism 600 and first filtering mechanism 400 in filter chamber 300's inside, make rivers follow water inlet 210 and get into after filter chamber 300, can be under hydraulic effect, strike vortex mechanism 600, vortex mechanism 600 receives the impact, take place to rotate, carry out vortex and guide to rivers, it flows to delivery port 110 to drive rivers, because first filtering mechanism 400 is located between water inlet 210 and the delivery port 110, and separate filter chamber 300, make the water in the filter chamber 300 at the in-process that flows to delivery port 110, must filter through first filtering mechanism 400, make the leading filter of connection on tap leading water route can filter the rivers that are about to flow tap, it contains large granule impurity to prevent the rivers that flow in the tap, improve the quality of water that tap flows.

As shown in fig. 2 and fig. 3, in the embodiment, the first filtering mechanism 400 divides the filtering chamber 300 into the water inlet chamber 310 and the water outlet chamber 320, the water inlet chamber 310 is communicated with the water inlet 210, the water outlet chamber 320 is communicated with the water outlet 110, the water flows into the water inlet chamber 310 from the water inlet 210, then flows into the water outlet chamber 320 after being filtered by the first filtering mechanism 400, and finally flows out of the pre-filter from the water outlet 110, the flow disturbing mechanism 600 can be disposed in the water inlet chamber 310 or the water outlet chamber 320, preferably, the flow disturbing mechanism 600 is disposed in the water inlet chamber 310, because the water pressure of the water flow entering the water inlet chamber 310 through the water inlet 210 is higher, the impact effect on the flow disturbing mechanism 600 located in the water inlet chamber 310 is better, the high-strength impact can increase the rotating speed of the flow disturbing mechanism 600, and further increase the flow disturbing effect of the flow disturbing mechanism 600 on the water flow, so that the swirling effect in the filtering chamber 300 is better, and ultimately the filtering effect of the first filter mechanism 400 on the water flow.

In this embodiment, the first filtering mechanism 400 is a filtering net, the filtering net is horizontally disposed in the filtering chamber 300, and divides the filtering chamber 300 into the water inlet chamber 310 and the water outlet chamber 320 located at the upper portion of the water inlet chamber 310, the water outlet chamber 320 is located at the upper portion of the water inlet chamber 310, and the gravity can be used to prevent the impurities from floating up to the water outlet 110, so as to assist the separation of the impurities, as shown in fig. 2, the second filtering mechanism 500 is further disposed in the water inlet chamber 310, the second filtering mechanism 500 is disposed at the lower portion of the flow disturbing mechanism 600 and forms a collecting chamber 330 for collecting the impurities with the bottom of the housing, the water flow entering the water inlet chamber 310 through the water inlet 210 flows to the collecting chamber 330 at the lower portion of the second filtering mechanism 500 first under the action of the flow disturbing mechanism 600, then flows from the collecting chamber 330 to the water inlet chamber 310 at the upper portion through the second filtering mechanism 500 and leaves the large-particle impurities in the collecting chamber 330 for primary filtering, and then flows to the water outlet chamber 320 at the upper portion through the first filtering mechanism 400, and the impurities are left at the lower part of the first filtering mechanism 400 to realize secondary filtering, so that the water flow filtered twice is cleaner, and the water quality of the water flow flowing out of the pre-filter is better.

As shown in fig. 7, the second filtering mechanism 500 is preferably a partition plate, which is provided with a strip-shaped hole 510 and a filtering hole 520, the water flow entering the water inlet chamber 310 through the water inlet 210 flows to the collecting chamber 330 at the lower part of the second filtering mechanism 500 through the strip-shaped hole 510 under the action of the turbulent flow mechanism 600, and then flows to the water inlet chamber 310 at the upper part from the collecting chamber 330 through the filtering hole 520, the strip-shaped hole 510 facilitates the rapid and mass entry of the water flow into the collecting chamber 330, and the filtering hole 520 blocks the large-particle impurities in the water flow, so as to leave the large-particle impurities in the collecting chamber 330, thereby realizing one-time filtering. The aperture of the filter screen in this embodiment is smaller than the aperture of the filter holes 520 on the partition plate, so that the second filtration can further filter the smaller impurities of the water flow, and the filtering effect is better. The bar hole 510 is equipped with a plurality ofly, a plurality of bar holes 510 are along the radial distribution of division board, make whirl state's rivers can get into from a plurality of positions and collect in the chamber 330, in order to carry out the drainage to intake chamber 310 internal whirl state's rivers, guide rivers get into through bar hole 510 and collect chamber 330, this embodiment still is equipped with the direction muscle 530 that is located bar hole 510 upper portion on the division board, the slope of direction muscle 530 sets up, also can block the large granule impurity formation of collecting in the chamber 330, prevent that large granule impurity from getting into in the intake chamber 310.

The vortex mechanism 600 in this embodiment includes pivot 610 and a plurality of blades 620 that link to each other with pivot 610, vortex mechanism 600 installs on the division board through pivot 610, and vortex mechanism 600's pivot 610 and the coaxial setting of the center pin of filter chamber 300, can be to the inside abundant vortex of filter chamber 300, the lateral part of casing is located to water inlet 210, preferably, as shown in fig. 6, water inlet 210 towards blade 620 eccentric settings, the center pin of water inlet 210 does not pass the center pin of vortex mechanism 600 promptly, make the rivers that get into in filter chamber 300 through water inlet 210 directly impact blade 620 and form the whirl along filter chamber 300, it is effectual to the promotion of vortex mechanism 600.

After the pre-filter is used for a period of time, a certain amount of large particle impurities are accumulated in the filter chamber 300, the shell can be disassembled, and the interior of the shell is cleaned, so that the filter mechanism can be continuously used later, and the filter effect of the first filter mechanism 400 and the second filter mechanism 500 is prevented from being influenced by the accumulated large particle impurities. In order to facilitate discharging large particle impurities accumulated at the bottom of the second filtering mechanism 500, as shown in fig. 3, a drain outlet 220 communicated with the collecting chamber 330 is provided at the bottom of the lower housing 200 in this embodiment, a drain valve 230 for opening and closing the drain outlet 220 is installed on the drain outlet 220, when the pre-filter works, the drain valve 230 is closed, and large particle impurities are accumulated in the water inlet chamber 310 at the lower part of the second filtering mechanism 500; pile up certain quantity when large granule impurity, when needing to carry out blowdown clearance to the prefilter, open blowoff valve 230, the inside filter chamber 300 of prefilter forms siphonage with the external world, the rivers that flow to delivery port 110 originally flow to flow back to drain 220, carry impurity of first filtering mechanism 400 lower part and the impurity of second filtering mechanism 500 lower part and discharge the prefilter from drain 220 through blowoff valve 230 jointly, the realization is to the back flush blowdown of first filtering mechanism 400 and second filtering mechanism 500, guarantee the cleanness and the filter effect of prefilter. In order to prevent the unfiltered water from passing between the first filter means 400 and the inner wall of the housing or between the second filter means 500 and the inner wall of the housing, a seal ring may be provided on the peripheral sides of the first filter means 400 and the second filter means 500 to seal between the first filter means 400 and the housing and between the second filter means 500 and the housing.

As shown in fig. 3 to 5, in this embodiment, the housing includes an upper housing 100 and a lower housing 200 detachably connected, the upper housing 100 covers the lower housing 200 to form a filter chamber 300 for accommodating the first filter mechanism 400, when a user needs to clean the pre-filter, the user can detach the upper housing 100 from the lower housing 200 and respectively clean the pre-filter, and the upper housing 100 and the lower housing 200 detachably connected are more convenient for the user to operate, thereby reducing the difficulty of cleaning.

In this embodiment, the inner wall of the lower housing 200 is provided with an installation step, the installation step is annular and includes a first installation step 240 and a second installation step 250 located at the upper portion of the first installation step 240, the first filter mechanism 400 is located in the lower housing 200, the bottom of the first filter mechanism 400 is abutted against the top surface of the first installation step 240 to support the first filter mechanism 400, the top surface of the first filter mechanism 400 is flush with the top surface of the second installation step 250, the bottom of the upper housing 100 is extended downward with an annular installation convex rib 120, when the upper housing 100 and the lower housing 200 are in an assembled state, the installation convex rib 120 is extended into the lower housing 200, the inner ring at the bottom of the installation convex rib 120 is abutted against the top surface of the first filter mechanism 400, the installation convex rib 120 and the first installation step 240 clamp the first filter mechanism 400 together, so as to prevent the first filter mechanism 400 from shaking in the vertical direction, the outer ring of the bottom of the mounting rib 120 abuts against the top surface of the second mounting step 250, so as to facilitate mounting and positioning. In order to facilitate the mounting and dismounting of the upper and lower cases 100 and 200, it is preferable that the present embodiment is provided with an external thread on the outer circumferential side of the mounting bead 120 and an internal thread on the inner wall of the lower case 200 to be engaged with the external thread, so that the upper and lower cases 100 and 200 are screw-coupled. A sealing ring is further provided between the mounting rib 120 and the inner wall of the lower case 200 to prevent water leakage for the sealing connection between the upper case 100 and the lower case 200.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A pre-filter, characterized by: including the inside casing that is equipped with the filter chamber, be equipped with on the casing with the water inlet and the delivery port of filter chamber intercommunication, be equipped with vortex mechanism in the filter chamber and be located the water inlet with first filtering mechanism between the delivery port, vortex mechanism receives the rivers impact of filter chamber takes place to rotate to drive rivers warp first filtering mechanism to the delivery port flows.

2. A pre-filter according to claim 1, wherein: the first filtering mechanism divides the filtering cavity into a water inlet cavity communicated with the water inlet and a water outlet cavity communicated with the water outlet, and the turbulence mechanism is arranged in the water inlet cavity.

3. A pre-filter according to claim 2, wherein: the water outlet cavity is arranged on the upper portion of the water inlet cavity, a second filtering mechanism is further arranged in the water inlet cavity, and the second filtering mechanism is arranged on the lower portion of the turbulence mechanism and forms a collecting cavity for collecting impurities with the bottom of the shell.

4. A pre-filter according to claim 3, wherein: the second filtering mechanism is a partition plate, the partition plate is provided with strip-shaped holes and filtering holes, the turbulence mechanism drives water to flow through the strip-shaped holes to enter the collecting cavity and the filtering holes to flow out of the collecting cavity to leave impurities in the collecting cavity.

5. A pre-filter according to claim 4, characterised in that: the strip-shaped holes are multiple and distributed along the radial direction of the partition plates.

6. A pre-filter according to claim 4, characterised in that: the partition plate is further provided with a guide rib located on the upper portion of the strip-shaped hole, and the guide rib is obliquely arranged.

7. A pre-filter according to claim 4, characterised in that: the vortex mechanism include with the coaxial pivot that sets up of filter chamber and a plurality of blade that link to each other with the pivot, the pivot is installed on the division board, the water inlet is located the lateral part of casing, just the water inlet orientation blade off-centre sets up.

8. A pre-filter according to claim 3, wherein: the bottom of the shell is provided with a drain outlet communicated with the collecting cavity, and a drain valve for opening and closing the drain outlet is installed on the drain outlet.

9. A pre-filter according to any one of claims 1 to 8, characterised in that: the casing is including dismantling the last casing and the casing down of connection, go up the casing lid and close down on the casing in order to form and hold first filter mechanism's filter chamber.

10. A pre-filter according to claim 9, wherein: first filter mechanism locates in the inferior valve body, be equipped with the installation step that is used for supporting first filter mechanism on the inner wall of lower casing, it has the protruding muscle of installation to go up casing downwardly extending, the protruding muscle of installation with first filter mechanism's top counterbalance with the installation step presss from both sides tightly jointly first filter mechanism.

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