CN117658294A - Magnetic filter device - Google Patents

Abstract

The invention belongs to the technical field of filtering equipment, and discloses a magnetic filtering device. The magnetic filter device comprises a filter main body and an intermediate spacer, and a water inlet is arranged on the filter main body. The middle spacer bush is sleeved in the filter main body, a water passing channel is formed between the middle spacer bush and the filter main body, and a water outlet is formed in the middle spacer bush. The middle spacer bush is provided with a water passing window which is staggered with the water inlet, and a magnet for adsorbing magnetic impurities in water flow is arranged in the middle spacer bush; the water flow enters the water channel through the water inlet, enters the middle spacer bush after passing through the water passing window, and flows to the water outlet and is discharged. Through setting up middle spacer and staggering setting of crossing water window and water inlet, rivers need flow one section distance back in crossing water channel and turn through crossing water window again, and rivers have obtained the buffering to reduce the impact force of rivers to the magnet, make the magnet can exert the ability of adsorbing magnetic impurity greatly, and then improve magnetic filter device's filtration performance.

Description

Magnetic filter device

Technical Field

The invention relates to the technical field of filtering equipment, in particular to a magnetic filtering device.

Background

In fluid conveying pipelines such as kitchen and bathroom or floor heating, particularly in pipelines for conveying hot water, magnetic impurities such as rust and the like inevitably exist, and the accumulation of the impurities can cause blockage of the pipelines, so that the fluid conveying resistance is high, and even the service life of equipment on the pipelines can be influenced. Therefore, a magnetic filter device is usually arranged on the conveying pipeline to filter the water body.

The magnetic filtering device comprises a cavity and a magnet arranged in the cavity, a water inlet and a water passing window are arranged on the cavity, the water body is impacted onto the magnet through the water inlet, and after magnetic impurities are adsorbed by the magnet, the water body is discharged from the water passing window. The impact force of water flow to the magnet is larger, the capability of the magnet for adsorbing magnetic impurities is reduced and disturbed, and the filtering performance of the magnetic filtering device is affected.

Therefore, a magnetic filter device is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a magnetic filter device, which can reduce the direct impact of water flow on a magnet, improve the capability of the magnet for adsorbing magnetic impurities and is beneficial to improving the filtering performance of the magnetic filter device.

To achieve the purpose, the invention adopts the following technical scheme:

a magnetic filtration device comprising:

the filter comprises a filter main body, wherein a water inlet is formed in the filter main body;

the middle spacer bush is sleeved in the filter main body, a water passing channel is formed between the middle spacer bush and the filter main body, and a water outlet is formed in the middle spacer bush;

the middle spacer bush is provided with a water passing window which is staggered with the water inlet, and a magnet for adsorbing magnetic impurities in water flow is arranged in the middle spacer bush; the water flow enters the water passing channel through the water inlet, enters the middle spacer bush after passing through the water passing window, and flows to the water outlet and is discharged.

As an alternative, a guiding protrusion is provided on the inner wall of the middle spacer, and the guiding protrusion is provided on the flow path of the water flow and is used for guiding the water flow to the direction of the magnet.

As an alternative scheme, two water passing windows are arranged, the two water passing windows are symmetrically arranged at two sides of the water inlet, the guide protrusions are arranged between the two water passing windows, guide inclined planes are symmetrically arranged at two sides of the guide protrusions, the two guide inclined planes are intersected at one end facing the magnet, and water at two sides of the guide protrusions flows through the guide inclined planes and then flows out to be opposite to each other.

Alternatively, the intersection of the two guide slopes, the center of the magnet, and the center of the water inlet are on the same straight line.

Alternatively, the guiding inclined plane is an arc inclined plane, and the arc inclined plane is smoothly connected with the inner wall of the middle spacer bush.

Alternatively, the radian radius of the arc-shaped inclined plane is set to be R5-R20mm.

As an alternative scheme, the middle spacer bush is arranged to be cylindrical, and the water passing window is arranged on the cambered surface of the middle spacer bush opposite to the water inlet.

Alternatively, the cambered surface angle alpha of the middle spacer bush opposite to the water inlet is set to be 150-240 degrees.

Alternatively, the cambered surface angle α is set to 180 °.

Alternatively, the water passing window is disposed along an extending direction of the magnet.

Alternatively, the upper side of the water passing window is higher than the water inlet.

As an alternative scheme, a baffle plate is arranged on the inner wall of the middle spacer bush opposite to the water outlet, the baffle plate extends downwards to the bottom side of the middle spacer bush, a communication port is formed between the baffle plate and the middle spacer bush, and the communication port is communicated with the water outlet.

As an alternative scheme, magnetic filter device still includes the three-way valve, the three-way valve include water inlet connector, play water joint and with the attach fitting that the filter bulk phase is connected, attach fitting includes outer sleeve pipe and inlayer sleeve pipe that cup joints mutually, inlayer sleeve pipe intercommunication play water joint with the delivery port, inlayer sleeve pipe with form the cavity between the outer sleeve pipe, the cavity intercommunication water inlet connector with the water inlet.

As an alternative, an extension sleeve is provided between the connection joint and the filter body, the extension sleeve being used for communicating the intermediate spacer with the connection joint.

Alternatively, the filter body is connected with the three-way valve through a reversing adjustment mechanism, and is used for adjusting the installation direction of the three-way valve.

As an alternative scheme, the top of filter main part is provided with the opening, opening part lid is equipped with the lid, the lid peg graft in the filter main part and support the middle spacer bush.

The beneficial effects are that:

according to the magnetic filter device provided by the invention, the middle spacer bush is arranged in the filter main body, so that a water passing channel is formed between the filter main body and the middle spacer bush, water flow enters the water passing channel through the water inlet on the filter main body, enters the middle spacer bush after passing through the water passing window, and then flows to the water outlet on the middle spacer bush and is discharged. Because the water passing window and the water inlet are staggered, water flow needs to flow a certain distance in the water passing channel and then turns to pass through the water passing window, and the water flow is buffered, so that the impact force of the water flow on the magnet is reduced, the magnet can exert the capability of adsorbing magnetic impurities to a greater extent, and the filtering performance of the magnetic filtering device is improved.

Drawings

FIG. 1 is a schematic diagram of a magnetic filter device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a magnetic filter device according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a magnetic filter device according to a first embodiment of the present invention;

FIG. 4 is a schematic view of an intermediate spacer according to a first embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a magnetic filter device according to an embodiment of the present invention;

fig. 6 is a schematic view of a magnetic filter device (with a filter body removed) according to a first embodiment of the present invention;

FIG. 7 is a second schematic structural view of an intermediate spacer according to the first embodiment of the present invention;

FIG. 8 is a schematic diagram of a magnetic filter device according to a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of a three-way valve according to a second embodiment of the present invention;

fig. 10 is a schematic structural diagram of a magnetic filter device (excluding a three-way valve) according to a second embodiment of the present invention.

In the figure:

10. a water passing channel; 11. an intermediate spacer; 111. a water passing window; 112. a guide protrusion; 1121. a guide slope; 113. a water outlet; 114. a baffle plate; 115. a communication port; 12. a filter body; 121. a water inlet; 122. a sewage outlet; 123. a butt joint barrel; 1231. positioning the bulge; 1232. a plug hole; 13. a cover body; 14. a first pin; 15. a seal; 16. a blow-down valve; 17. an anti-falling member; 171. a connection part; 172. an abutting portion; 18. a second pin;

2. a magnet;

3. a three-way valve; 31. a water inlet joint; 32. a water outlet joint; 33. a connection joint; 331. an outer sleeve; 332. an inner sleeve; 333. a cavity; 334. a clamping block; 335. a plug-in groove; 336. a mounting groove;

4. extending the sleeve;

6. and (3) sealing rings.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Embodiment one:

as shown in fig. 1-4, the present embodiment provides a magnetic filter device, which includes a filter main body 12 and an intermediate spacer 11, wherein a water inlet 121 is provided on the filter main body 12, the intermediate spacer 11 is sleeved in the filter main body 12, a water passing channel 10 is formed between the intermediate spacer 11 and the filter main body 12, a water outlet 113 is provided on the intermediate spacer 11, a water passing window 111 is provided on the intermediate spacer 11, the water passing window 111 is staggered with the water inlet 121, and a magnet 2 for adsorbing magnetic impurities in water flow is provided in the intermediate spacer 11; the water flow enters the water channel 10 through the water inlet 121, enters the middle spacer 11 after passing through the water outlet window 111, and flows to the water outlet 113 and is discharged.

By arranging the middle spacer 11 in the filter main body 12, a water passing channel 10 is formed between the filter main body 12 and the middle spacer 11, water flows into the water passing channel 10 through the water inlet 121 on the filter main body 12, enters the middle spacer 11 after passing through the water passing window 111, and flows to the water outlet 113 on the middle spacer 11 and is discharged. Because the water passing window 111 and the water inlet 121 are staggered, water flow needs to flow a certain distance in the water passing channel 10 and then turns to pass through the water passing window 111, and the water flow is buffered, so that the impact force of the water flow on the magnet 2 is reduced, the magnet 2 can exert the capability of absorbing magnetic impurities to a greater extent, and the filtering performance of the magnetic filtering device is improved.

Further, as shown in fig. 5, in order to discharge the impurities adsorbed by the magnet 2, a drain 122 is provided at the lower end of the filter body 12, a drain valve 16 is provided at the drain 122, and the drain 122 can be opened or closed by the drain valve 16. This is a conventional structure of the magnetic filter device in the prior art, and will not be described in detail herein.

Further, as shown in fig. 4, a guide protrusion 112 is provided on the inner wall of the intermediate spacer 11, and the guide protrusion 112 is provided on the flow path of the water flow for guiding the water flow toward the magnet 2. By arranging the guide protrusion 112, the water flow entering the middle spacer 11 from the water window 111 will impact the guide protrusion 112, the guide protrusion 112 blocks the water flow, the flow speed of the water flow is further reduced, and the impact of the water flow on the magnet 2 is reduced. Specifically, the water passing window 111 may be provided in a square shape, which is advantageous in reducing shielding of water flow, so that the water flow can strike the top and bottom of the guide protrusion 112 to form a vortex. Of course, the water outlet window 111 may be formed in an elliptical shape, so that the water flow is slightly blocked at four corners, but the formation of the vortex at the middle section of the guide protrusion 112 is not affected. In the present embodiment, the specific shape of the water passing window 111 is not limited.

Alternatively, as shown in fig. 4, two water passing windows 111 are provided, two water passing windows 111 are symmetrically arranged at two sides of the water inlet 121, a guide protrusion 112 is arranged between the two water passing windows 111, two sides of the guide protrusion 112 are symmetrically provided with guide inclined planes 1121, the two guide inclined planes 1121 intersect at one end facing the magnet 2, and water at two sides of the guide protrusion 112 flows out through the guide inclined planes 1121 and then is relatively punched.

By arranging two symmetrical guide inclined planes 1121 on the guide bulge 112, water entering the middle spacer bush 11 from the two water passing windows 111 is guided by the guide inclined planes 1121 on two sides to be extruded in a relative punching way, the rotation of the fluid is accelerated to form backflow, the flow speed of the water is reduced, vortex is formed, the vortex rotates around the middle magnet 2 and is fully contacted with the magnet 2, the contact time of the water and the magnet 2 is prolonged, and impurities and magnetic substances in the water are easier to be absorbed by the magnet 2 and then slowly subside. Simulation experiments prove that the flow velocity of water flow is greatly slowed down after the water flow enters the middle spacer bush 11, and the speed can be slowed down by 5-10 times.

Alternatively, as shown in connection with fig. 6, the intersection of the two guide slopes 1121, the center of the magnet 2, and the center of the water inlet 121 are on the same straight line. The water flow entering the water passage 10 from the water inlet 121 is symmetrically flown onto the guide slope 1121 to enhance the vortex effect. In this case, the guide protrusion 112 and the water inlet 121 are respectively at two radial ends of the middle spacer 11, so that the water flow impinging on the guide protrusion 112 from two sides is more uniform, and a better vortex effect can be formed. Of course, the relative positions of the guide projection 112 and the water inlet 121 are not limited to this, and the guide projection 112 may be slightly inclined so as not to face the water inlet 121, and the effect of forming a vortex and reducing the flow rate may be similarly achieved.

Further, referring back to fig. 4, the guiding inclined plane 1121 is configured as an arc inclined plane, and the arc inclined plane is smoothly connected with the inner wall of the middle spacer 11, so as to provide smooth guiding for the water flow, so that the water flow flows out of the guiding inclined plane 1121 more smoothly and smoothly, and the formation of subsequent vortex is facilitated. Specifically, the radian radius of the arc-shaped inclined plane is set to be R5-R20mm.

Further, as shown in fig. 4, the middle spacer 11 is configured as a cylinder, the water passing window 111 is disposed on the arc surface of the middle spacer 11 opposite to the water inlet 121, and is close to the guide protrusion 112, and the water passing window 111 is far away from the water inlet 121, so that the water flow reaches the water passing window 111 after flowing in the water passage 10 for a long distance, and in this process, the water flow is rectified and slowed down, so as to more stably enter the middle spacer 11.

Alternatively, the arc angle α of the intermediate spacer 11 facing the water inlet 121 is set to 150 ° -240 °. The arc angle α is preferably set to 180 °. That is, the water passing window 111 is not too large or too small, and in this range, the water flow forms a significant vortex.

Further, as shown in fig. 3 and 4, the water passing window 111 is provided along the extending direction of the magnet 2, and the water passing window 111 is provided opposite to the magnet 2, so that the water flow can cover the magnet 2, thereby fully utilizing the magnet 2.

Optionally, the upper side of the water passing window 111 is higher than the water inlet 121, so that water flow can enter the middle spacer 11 from a higher point better, and the water flow descending time is prolonged.

Alternatively, as shown in fig. 7, a baffle 114 is disposed on the inner wall of the middle spacer 11 opposite to the water outlet 113, the baffle 114 extends downward to the bottom side of the middle spacer 11, and a communication port 115 is formed between the baffle 114 and the middle spacer 11, and the communication port 115 is communicated with the water outlet 113. Because the communication port 115 is arranged at the bottom of the middle spacer 11, water flow can flow from the communication port 115 at the bottom to the water outlet 113 only when flowing through the whole middle spacer 11 from top to bottom, so that the contact area of the water flow and the magnet 2 is increased, and the filter effect is improved.

Further, referring to fig. 2 and 3, for connection with the fluid pipeline, the magnetic filter device further includes a three-way valve 3, the three-way valve 3 includes a water inlet joint 31, a water outlet joint 32, and a connection joint 33 connected with the filter main body 12, the connection joint 33 is screwed with the filter main body 12, the connection joint 33 includes an outer sleeve 331 and an inner sleeve 332 sleeved with each other, the inner sleeve 332 is communicated with the water outlet joint 32 and the water outlet 113, a cavity 333 is formed between the inner sleeve 332 and the outer sleeve 331, and the cavity 333 is communicated with the water inlet joint 31 and the water inlet 121.

Optionally, an extension sleeve 4 is provided between the connection joint 33 and the filter body 12, the extension sleeve 4 being used for communicating the intermediate space sleeve 11 with the connection joint 33. By arranging the extension sleeve 4, the problem of insufficient length of the connecting joint 33 of the three-way valve 3 can be solved, and the special three-way valve 3 is not required to be customized additionally.

Further, as shown in fig. 1 and 3, an opening is provided at the top end of the filter main body 12, a cover 13 is provided at the opening, and the cover 13 is inserted into the filter main body 12 and abuts against the middle spacer 11, so that the middle spacer 11 is stably installed in the filter main body 12.

Specifically, the cover 13 is fixed to the filter body 12 by the first pin 14. The cover 13 and the filter main body 12 are correspondingly provided with first inserting holes, after the lower end of the cover 13 is clamped into the filter main body 12, the first inserting pins 14 are inserted to limit the relative movement of the cover 13 and the filter main body 12, so that the cover 13 is fixed. In order to improve the connection sealing between the cover 13 and the filter body 12, a seal 15 is interposed between the cover 13 and the filter body 12.

The magnet 2 is disposed inside the cover 13, and before the cover 13 is mounted, the magnet 2 is fixed to the cover 13, and then the magnet 2 and the cover 13 are assembled together to the filter body 12.

Embodiment two:

as shown in fig. 8 to 10, this embodiment provides a magnetic filter device, which is substantially the same as the first embodiment, except that: the three-way valve 3 is connected with the filter main body 12.

Specifically, the filter main body 12 is provided with a docking cylinder 123 communicating with the inside thereof, and the three-way valve 3 is inserted into the docking cylinder 123. In order to fix the three-way valve 3 on the docking cylinder 123 and make the three-way valve 3 conveniently adjust the installation direction on the docking cylinder 123, the docking cylinder 123 is connected with the three-way valve 3 through a reversing adjustment mechanism for adjusting the installation direction of the three-way valve 3.

Specifically, the reversing adjustment mechanism includes a positioning member and a locking member, and the three-way valve 3 and the docking cylinder 123 are relatively provided with the positioning member for restricting rotation of the three-way valve 3 relative to the docking cylinder 123. The locking piece is arranged through the butt joint barrel 123 and the three-way valve 3 in a penetrating way so as to limit the three-way valve 3 to axially move relative to the butt joint barrel 123.

Through setting up three-way valve 3 to the mode that links to each other with filter main part 12 pegging graft, can be with three-way valve 3 adjustment to suitable installation angle in the direct insertion butt joint section of thick bamboo 123 connect, the assembly is very swift, does not occupy operating space, is particularly useful for the narrow and small installation environment in space. The three-way valve 3 is inserted into the butt joint barrel 123, the three-way valve 3 is limited to rotate through the positioning piece, and the three-way valve 3 is limited to axially move through the locking piece penetrating through the butt joint barrel 123 and connected with the three-way valve 3. Thereby the three-way valve 3 is firmly installed in the butt joint barrel 123, and the firm assembly of the three-way valve 3 and the filter main body 12 is realized.

Further, as shown in fig. 9 and 10, the positioning member adopts a mode of matching the positioning protrusion 1231 and the clamping block 334, a plurality of positioning protrusions 1231 are circumferentially arranged on the inner wall of the docking cylinder 123, a plurality of clamping blocks 334 are arranged on the end face of the three-way valve 3 inserted into the docking cylinder 123, and the clamping blocks 334 are clamped on the positioning protrusions 1231. After the three-way valve 3 is inserted in place, the side surface of the clamping block 334 abuts against the positioning protrusion 1231 at the corresponding position, so that the three-way valve 3 can be limited to rotate.

In this embodiment, the number of the positioning protrusions 1231 is greater than the number of the positioning protrusions 1231, so that the occupied space of the positioning protrusions 1231 can be reduced on the basis of ensuring the clamping limitation of the clamping protrusions 334, which is beneficial to increasing the inner space of the butting barrel 123 and improving the flow.

Specifically, the positioning projections 1231 are provided with no more than four, and the plurality of positioning projections 1231 are provided at uniform intervals in the circumferential direction of the docking cylinder 123. The clamping block 334 can be blocked by the positioning protrusion 1231, so that the three-way valve 3 can be rotated and limited, and the positioning protrusion 1231 with a proper amount of more is arranged, so that the structural strength of the joint of the clamping block can be enhanced, and the clamping block 334 or the positioning protrusion 1231 is prevented from being stressed and damaged.

It is understood that in other embodiments, the number of the positioning protrusions 1231 may be the same as the number of the clamping blocks 334, and the clamping blocks 334 are in one-to-one correspondence with the positioning protrusions 1231 and are inserted into the gaps between the adjacent positioning protrusions 1231.

Further, the locking element employs a second pin 18. Of course, in other embodiments, the locking member may also be a buckle or a clip, which can limit the connection between the three-way valve 3 and the filter main body 12, and limit the relative axial movement therebetween, and the specific structure of the locking member is not limited herein.

In this embodiment, as shown in fig. 9 and 10, through insertion holes 1232 are provided at two radial ends of the docking cylinder 123, insertion grooves 335 are provided on the outer wall of the three-way valve 3 opposite to the insertion holes 1232, and the second pins 18 are bent and arranged to pass through the insertion holes 1232 and the insertion grooves 335 at the two ends. The second pin 18 is inserted into the insertion groove 335 to restrict the three-way valve 3 from moving axially.

Alternatively, as shown in fig. 9, the insertion groove 335 surrounds the outer wall of the three-way valve 3 by one turn, and the second pin 18 can be inserted into the insertion groove 335 when the three-way valve 3 is rotated to any angle.

Further, as shown in fig. 9 and 10, in order to improve the sealing property between the three-way valve 3 and the butting cylinder 123, a seal ring 6 is interposed between the three-way valve 3 and the butting cylinder 123. In order to facilitate the installation of the sealing ring 6, the three-way valve 3 is provided with an installation groove 336, and the sealing ring 6 is arranged in the installation groove 336.

Further, in order to prevent the second pin 18 from being removed, an anti-removal member 17 is provided on the outer wall of the docking cylinder 123, and the anti-removal member 17 is provided opposite to the second pin 18 for preventing the second pin 18 from being removed from the insertion hole 1232.

Specifically, the anti-falling member 17 includes a connection portion 171 and an abutment portion 172, one end of the connection portion 171 is connected to the docking cylinder 123, the connection portion 171 is located at one side of the second pin 18, the abutment portion 172 is connected to the other end of the connection portion 171, and the abutment portion 172 extends in the direction of the second pin 18 to shield the second pin 18, and maintains a preset gap with the second pin 18. The second contact pin 18 is set to be U-shaped, two ends are respectively inserted into two plug holes 1232 on the butt joint barrel 123, the middle part is attached to the upper side surface of the butt joint barrel 123, the butt joint part 172 shields the middle part of the second contact pin 18, and a certain gap is kept between the butt joint part 172 and the second contact pin 18 by setting, so that the second contact pin 18 can be assembled conveniently. When the second pin 18 is separated from the three-way valve 3 by a small distance, it will abut against the abutment 172, and the limit of the three-way valve is not affected.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (16)

1. A magnetic filtration device, comprising:

a filter body (12), wherein a water inlet (121) is arranged on the filter body (12);

the middle spacer bush (11) is sleeved in the filter main body (12), a water passing channel (10) is formed between the middle spacer bush (11) and the filter main body (12), and a water outlet (113) is formed in the middle spacer bush (11);

a water passing window (111) is formed in the middle spacer bush (11), the water passing window (111) and the water inlet (121) are staggered, and a magnet (2) for adsorbing magnetic impurities in water flow is arranged in the middle spacer bush (11); the water flow enters the water passing channel (10) through the water inlet (121), passes through the water passing window (111) and then enters the middle spacer bush (11), and then flows to the water outlet (113) (113) and is discharged.

2. The magnetic filter device according to claim 1, characterized in that a guiding protrusion (112) is provided on the inner wall of the intermediate spacer (11), which guiding protrusion (112) is provided on the flow path of the water flow for guiding the water flow in the direction of the magnet (2).

3. The magnetic filter device according to claim 2, wherein two water passing windows (111) are provided, the two water passing windows (111) are symmetrically arranged at two sides of the water inlet (121), the guide protrusions (112) are arranged between the two water passing windows (111), guide inclined planes (1121) are symmetrically arranged at two sides of the guide protrusions (112), and the two guide inclined planes (1121) are intersected at one end facing the magnet (2) so that water at two sides of the guide protrusions (112) flows through the guide inclined planes (1121) to flow out and then to be relatively punched.

4. A magnetic filter device according to claim 3, characterized in that the intersection of the two guiding bevels (1121), the centre of the magnet (2) and the centre of the water inlet (121) are on the same straight line.

5. A magnetic filter device according to claim 3, characterized in that the guiding ramp (1121) is provided as an arc-shaped ramp which is smoothly connected to the inner wall of the intermediate spacer (11).

6. The magnetic filter device according to claim 5, wherein the arc radius of the arc-shaped inclined surface is set to R5-R20mm.

7. The magnetic filter device according to claim 4, characterized in that the middle spacer (11) is provided in a cylindrical shape, and the water passing window (111) is provided on the arc surface of the middle spacer (11) facing away from the water inlet (121).

8. A magnetic filter device according to claim 7, characterized in that the angle of arc α of the intermediate spacer (11) facing the water inlet (121) is set to 150 ° -240 °.

9. The magnetic filter device according to claim 8, wherein the arc angle α is set to 180 °.

10. The magnetic filter device according to any one of claims 1-9, characterized in that the water passing window (111) is arranged along the extension direction of the magnet (2).

11. The magnetic filter device according to claim 10, characterized in that the upper side of the water passing window (111) is higher than the water inlet (121).

12. The magnetic filter device according to any one of claims 1-9, characterized in that a baffle (114) is arranged on the inner wall of the middle spacer (11) opposite to the water outlet (113), the baffle (114) extends downwards to the bottom side of the middle spacer (11) and forms a communication port (115) with the middle spacer (11), and the communication port (115) is communicated with the water outlet (113).

13. The magnetic filter device according to any one of claims 1-9, further comprising a three-way valve (3), the three-way valve (3) comprising a water inlet connector (31), a water outlet connector (32) and a connection connector (33) connected with the filter body (12), the connection connector (33) comprising an outer sleeve (331) and an inner sleeve (332) that are sleeved with each other, the inner sleeve (332) being in communication with the water outlet connector (32) and the water outlet (113), a cavity (333) being formed between the inner sleeve (332) and the outer sleeve (331), the cavity (333) being in communication with the water inlet connector (31) and the water inlet (121).

14. A magnetic filter device according to claim 13, characterized in that an extension sleeve (4) is arranged between the connection joint (33) and the filter body (12), the extension sleeve (4) being adapted to communicate the intermediate spacer (11) with the connection joint (33).

15. The magnetic filter device according to claim 13, characterized in that the filter body (12) is connected with the three-way valve (3) by a reversing adjustment mechanism for adjusting the mounting direction of the three-way valve (3).

16. The magnetic filter device according to any one of claims 1-9, characterized in that the top end of the filter body (12) is provided with an opening, a cover body (13) is covered at the opening, and the cover body (13) is inserted into the filter body (12) and abuts against the middle spacer (11).