Magnetic filtration device

Abstract

The present invention belongs to the technical field of filtering equipment and discloses a magnetic filtering device. The magnetic filtering device includes a filter body and an intermediate sleeve, and a water inlet is provided on the filter body. The intermediate sleeve is arranged in the filter body, and a water passage is formed between the intermediate sleeve and the filter body, and a water outlet is provided on the intermediate sleeve. A water passage window is provided on the intermediate sleeve, and the water passage window is staggered with the water inlet. A magnet for adsorbing magnetic impurities in the water flow is provided in the intermediate sleeve; the water flow enters the water passage through the water inlet, enters the intermediate sleeve after passing through the water passage window, and then flows to the water outlet and is discharged. By providing the intermediate sleeve and staggering the water passage window with the water inlet, the water flow needs to flow in the water passage for a distance before turning and passing through the water passage window. The water flow is buffered, thereby reducing the impact force of the water flow on the magnet, so that the magnet can maximize its ability to adsorb magnetic impurities, thereby improving the filtering performance of the magnetic filtering device.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering equipment, in particular to a magnetic filtering device. Background Art

[0002] In fluid delivery pipelines for kitchens, bathrooms, and floor heating systems, especially those transporting hot water, magnetic impurities such as rust are unavoidable. The accumulation of these impurities can cause pipe blockage, resulting in increased resistance to fluid delivery and even shortening the service life of equipment in the pipeline. Therefore, magnetic filtration devices are often installed in the delivery pipelines to filter the water.

[0003] A magnetic filtration device includes a chamber and a magnet positioned within it. The chamber is equipped with a water inlet and a water flow window. Water flows through the inlet and hits the magnet, where it absorbs magnetic impurities before being discharged through the water flow window. In existing magnetic filtration devices, the impact of water on the magnet is significant, reducing and interfering with the magnet's ability to absorb magnetic impurities and affecting the device's filtration performance.

[0004] Therefore, there is an urgent need for a magnetic filtering device to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a magnetic filter device that can reduce the direct impact of water flow on the magnet, improve the ability of the magnet to absorb magnetic impurities, and help improve the filtering performance of the magnetic filter device.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Magnetic filtration device, comprising:

[0008] A filter body, wherein the filter body is provided with a water inlet;

[0009] a middle spacer sleeve, which is sleeved in the filter body, and a water passage is formed between the middle spacer sleeve and the filter body, and a water outlet is provided on the middle spacer sleeve;

[0010] The middle spacer sleeve is provided with a water flow window, the water flow window and the water inlet are staggered, and the middle spacer sleeve is provided with a magnet for absorbing magnetic impurities in the water flow; the water flows into the water flow channel through the water inlet, enters the middle spacer sleeve after passing through the water flow window, and then flows to the water outlet and is discharged.

[0011] As an optional solution, a guide protrusion is provided on the inner wall of the middle spacer sleeve, and the guide protrusion is provided on the flow path of the water flow to guide the water flow toward the direction of the magnet.

[0012] As an optional solution, there are two water flow windows, which are symmetrically arranged on both sides of the water inlet, and the guide protrusion is arranged in the middle of the two water flow windows. Guide slopes are symmetrically arranged on both sides of the guide protrusion, and the two guide slopes intersect at one end facing the magnet, so that the water on both sides of the guide protrusion flows out through the guide slopes and rushes towards each other.

[0013] As an optional solution, 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.

[0014] As an optional solution, the guide slope is configured as an arc-shaped slope, and the arc-shaped slope is smoothly connected to the inner wall of the middle spacer sleeve.

[0015] As an optional solution, the radius of the arc slope is set to R5-R20mm.

[0016] As an optional solution, the middle spacer sleeve is configured to be cylindrical, and the water-passing window is provided on the arc surface of the middle spacer sleeve facing away from the water inlet.

[0017] As an optional solution, the arc angle α of the middle spacer sleeve facing the water inlet is set to 150°-240°.

[0018] As an optional solution, the arc angle α is set to 180°.

[0019] As an optional solution, the water flow window is provided along the extension direction of the magnet.

[0020] As an optional solution, the upper side of the water flow window is higher than the water inlet.

[0021] As an optional solution, a baffle is provided on the inner wall of the middle sleeve facing the water outlet, the baffle extends downward to the bottom side of the middle sleeve and forms a connecting port with the middle sleeve, and the connecting port is connected to the water outlet.

[0022] As an optional solution, the magnetic filtering device also includes a three-way valve, which includes a water inlet joint, a water outlet joint and a connecting joint connected to the filter body, the connecting joint includes an outer sleeve and an inner sleeve that are connected to each other, the inner sleeve connects the water outlet joint and the water outlet, and a cavity is formed between the inner sleeve and the outer sleeve, and the cavity connects the water inlet joint and the water inlet.

[0023] As an optional solution, an extension sleeve is provided between the connecting joint and the filter body, and the extension sleeve is used to connect the intermediate sleeve and the connecting joint.

[0024] As an optional solution, the filter body is connected to the three-way valve via a reversing adjustment mechanism for adjusting the installation direction of the three-way valve.

[0025] As an optional solution, an opening is provided at the top end of the filter body, and a cover is provided at the opening. The cover is plugged into the filter body and presses against the middle spacer.

[0026] Beneficial effects:

[0027] The magnetic filtration device proposed in the present invention incorporates a central spacer within the filter body, creating a water channel between the filter body and the central spacer. Water flows through the filter body's water inlet into the water channel, passes through a water window, enters the central spacer, and then flows to the water outlet on the central spacer for discharge. Because the water window is staggered from the water inlet, the water must flow a distance within the water channel before turning and passing through the water window. This buffers the flow, reducing the impact of the water on the magnet, allowing the magnet to maximize its ability to absorb magnetic impurities, thereby improving the filtration performance of the magnetic filtration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a magnetic filtering device provided in Example 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure of the magnetic filtering device provided in Example 1 of the present invention. Figure 1 ;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the magnetic filtering device provided in Example 1 of the present invention. Figure 2 ;

[0031] Figure 4 This is a schematic diagram of the structure of the intermediate spacer provided in Example 1 of the present invention. Figure 1 ;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the magnetic filtering device provided in Example 1 of the present invention. Figure 3 ;

[0033] Figure 6 Schematic diagram of the structure of the magnetic filtering device (excluding the filter body) provided in Example 1 of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the intermediate spacer provided in Example 1 of the present invention. Figure 2 ;

[0035] Figure 8 is a structural schematic diagram of a magnetic filtering device provided in Example 2 of the present invention;

[0036] Figure 9 This is a schematic structural diagram of a three-way valve provided in the second embodiment of the present invention;

[0037] Figure 10 It is a structural schematic diagram of the magnetic filtering device (excluding the three-way valve) provided in the second embodiment of the present invention.

[0038] In the picture:

[0039] 10. Water channel; 11. Intermediate spacer; 111. Water window; 112. Guide protrusion; 1121. Guide slope; 113. Water outlet; 114. Baffle; 115. Communication port; 12. Filter body; 121. Water inlet; 122. Drain outlet; 123. Docking tube; 1231. Positioning protrusion; 1232. Connecting hole; 13. Cover; 14. First pin; 15. Sealing element; 16. Drain valve; 17. Anti-slip element; 171. Connecting portion; 172. Abutting portion; 18. Second pin

[0040] 2. Magnet;

[0041] 3. Three-way valve; 31. Water inlet connector; 32. Water outlet connector; 33. Connecting connector; 331. Outer casing; 332. Inner casing; 333. Cavity; 334. Clamping block; 335. Connecting slot; 336. Mounting slot;

[0042] 4. Extend the casing;

[0043] 6. Sealing ring. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0045] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0048] Example 1:

[0049] like Figure 1-Figure 4 As shown, this embodiment provides a magnetic filtering device, including a filter body 12 and an intermediate sleeve 11, the filter body 12 is provided with a water inlet 121, the intermediate sleeve 11 is sleeved in the filter body 12, a water channel 10 is formed between the intermediate sleeve 11 and the filter body 12, a water outlet 113 is provided on the intermediate sleeve 11, a water window 111 is provided on the intermediate sleeve 11, the water window 111 and the water inlet 121 are staggered, and a magnet 2 for adsorbing magnetic impurities in the water flow is provided in the intermediate sleeve 11; the water flow enters the water channel 10 through the water inlet 121, enters the intermediate sleeve 11 after passing through the water window 111, and then flows to the water outlet 113 and is discharged.

[0050] By disposing the intermediate sleeve 11 within the filter body 12, a water passage 10 is formed between the filter body 12 and the intermediate sleeve 11. Water flows through the water inlet 121 on the filter body 12 into the water passage 10, passes through the water window 111, enters the intermediate sleeve 11, and then flows to the water outlet 113 on the intermediate sleeve 11 and is discharged. Because the water window 111 and the water inlet 121 are staggered, the water must flow a distance within the water passage 10 before turning and passing through the water window 111. This buffers the water flow, thereby reducing the impact of the water flow on the magnet 2, allowing the magnet 2 to maximize its ability to absorb magnetic impurities, thereby improving the filtering performance of the magnetic filter device.

[0051] Furthermore, if Figure 5As shown, in order to discharge impurities adsorbed by the magnet 2, a drain port 122 is provided at the lower end of the filter body 12. A drain valve 16 is provided at the drain port 122, and the drain port 122 can be opened or closed by the drain valve 16. This is a conventional structure of a magnetic filtering device in the prior art and will not be described in detail here.

[0052] Furthermore, if Figure 4 As shown, a guide protrusion 112 is provided on the inner wall of the middle spacer sleeve 11. The guide protrusion 112 is provided on the flow path of the water flow and is used to guide the water flow in the direction of the magnet 2. By providing the guide protrusion 112, the water flow entering the middle spacer sleeve 11 from the water flow window 111 will impact the guide protrusion 112. The guide protrusion 112 blocks the water flow, further reduces the flow rate of the water flow, and reduces the impact of the water flow on the magnet 2. Specifically, the water flow window 111 can be set to a square shape, which is conducive to reducing the obstruction of the water flow and allowing the water flow to impact the top and bottom of the guide protrusion 112 to form a vortex. Of course, the water outlet window 111 can also be set to an elliptical shape, which slightly blocks the water flow at the four corners, but does not affect the formation of the vortex in the middle section of the guide protrusion 112. In this embodiment, the specific shape of the water flow window 111 is not limited.

[0053] Alternatively, as Figure 4 As shown, two water-passing windows 111 are provided, and the two water-passing windows 111 are symmetrically arranged on both sides of the water inlet 121. The guide protrusion 112 is provided between the two water-passing windows 111. Guide slopes 1121 are symmetrically provided on both sides of the guide protrusion 112. The two guide slopes 1121 intersect at one end facing the magnet 2. The water on both sides of the guide protrusion 112 flows out through the guide slopes 1121 and then rushes towards each other.

[0054] By providing two symmetrical guide bevels 1121 on the guide protrusion 112, the water entering the middle spacer 11 from the two water windows 111 is guided by the guide bevels 1121 on both sides and then squeezed against each other, accelerating the rotation of the fluid to form a backflow, reducing the water flow rate and forming an eddy current. The eddy current rotates around the middle magnet 2 and fully contacts the magnet 2, increasing the contact time between the water flow and the magnet 2, making it easier for impurities and magnetic materials in the water flow to be attracted by the magnet 2 and slowly settle. Simulation experiments have verified that the water flow rate is significantly slowed after entering the middle spacer 11, and can be reduced by 5-10 times.

[0055] Optionally, combined Figure 6As shown, the intersection of the two guide bevels 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 channel 10 from the water inlet 121 flows symmetrically onto the guide bevels 1121 to improve the vortex effect. In this case, the guide protrusion 112 and the water inlet 121 are respectively at the radial ends of the middle spacer sleeve 11, so that the water flow impacting the guide protrusion 112 on both sides is more uniform, which can form a better vortex effect. Of course, the relative setting position of the guide protrusion 112 and the water inlet 121 is not limited to this. The guide protrusion 112 can also be slightly tilted and not directly facing the water inlet 121, which can also have the effect of forming vortices and slowing down the flow rate.

[0056] For further information, please refer back to Figure 4 The guide slope 1121 is configured as an arc-shaped slope, which is smoothly connected to the inner wall of the intermediate sleeve 11, thereby providing a smooth guide for the water flow, allowing the water flow to flow out of the guide slope 1121 more smoothly and stably, which is conducive to the formation of subsequent vortexes. Specifically, the radius of the arc-shaped slope is set to R5-R20mm.

[0057] Furthermore, if Figure 4 As shown, the middle spacer sleeve 11 is configured to be cylindrical, and the water flow window 111 is configured on the arc surface of the middle spacer sleeve 11 facing away from the water inlet 121, and is configured close to the guide protrusion 112. The water flow window 111 is farther away from the water inlet 121, so that the water flow flows a longer distance in the water flow channel 10 before reaching the water flow window 111. In this process, the water flow is rectified and decelerated, so that it enters the middle spacer sleeve 11 more stably.

[0058] Optionally, the arc angle α of the middle spacer 11 facing the water inlet 121 is set to 150°-240°. The arc angle α is preferably set to 180°. In other words, the area of ​​the water flow window 111 should not be too large or too small. Within this range, the water flow can form a significant vortex.

[0059] Further, combined with Figure 3 and Figure 4 As shown, the water flow window 111 is arranged along the extension direction of the magnet 2 . The water flow window 111 is arranged facing the magnet 2 so that the water flow can cover the magnet 2 , thereby making full use of the magnet 2 .

[0060] Optionally, the upper side of the water flow window 111 is higher than the water inlet 121, so that the water flow can better enter the middle spacer 11 from a higher point, thereby extending the time for the water flow to descend.

[0061] Alternatively, as Figure 7As shown, a baffle 114 is provided on the inner wall of the middle sleeve 11, facing the water outlet 113. The baffle 114 extends downward to the bottom side of the middle sleeve 11 and forms a communication opening 115 with the middle sleeve 11. The communication opening 115 is connected to the water outlet 113. Since the communication opening 115 is provided at the bottom of the middle sleeve 11, water flows from top to bottom through the entire middle sleeve 11 before flowing from the communication opening 115 at the bottom to the water outlet 113. This increases the contact area between the water flow and the magnet 2, which is conducive to improving the filtering effect.

[0062] Further, see Figure 2 and Figure 3 In order to connect with the fluid pipeline, the magnetic filtering device also includes a three-way valve 3, the three-way valve 3 includes an inlet joint 31, an outlet joint 32 and a connecting joint 33 connected to the filter body 12, the connecting joint 33 is threadedly connected to the filter body 12, the connecting joint 33 includes an outer sleeve 331 and an inner sleeve 332 that are connected to each other, the inner sleeve 332 connects the outlet joint 32 and the water outlet 113, and a cavity 333 is formed between the inner sleeve 332 and the outer sleeve 331, and the cavity 333 connects the water inlet joint 31 and the water inlet 121.

[0063] Optionally, an extension sleeve 4 is provided between the connection joint 33 and the filter body 12, and the extension sleeve 4 is used to connect the intermediate sleeve 11 and the connection joint 33. By providing the extension sleeve 4, the problem of insufficient length of the connection joint 33 provided with the three-way valve 3 can be compensated, and there is no need to customize a dedicated three-way valve 3.

[0064] Furthermore, if Figure 1 and Figure 3 As shown, the top of the filter body 12 is provided with an opening, and the opening is covered with a cover 13. The cover 13 is inserted into the filter body 12 and presses the middle sleeve 11 to make the middle sleeve 11 installed in the filter body 12 more firmly.

[0065] Specifically, the cover 13 is secured to the filter body 12 via a first insertion pin 14. First insertion holes are provided on the cover 13 and filter body 12, respectively. After the lower end of the cover 13 is inserted into the filter body 12, the first insertion pin 14 is inserted to restrict relative movement between the cover 13 and the filter body 12, thereby securing the cover 13. To enhance the sealing between the cover 13 and the filter body 12, a seal 15 is interposed between the two.

[0066] The magnet 2 is disposed inside the cover 13 . Before the cover 13 is installed, the magnet 2 is first fixed to the cover 13 , and then the magnet 2 and the cover 13 are assembled together to the filter body 12 .

[0067] Example 2:

[0068] like Figures 8-10 As shown, this embodiment provides a magnetic filtering device, which is basically the same as the first embodiment, and the only difference is: the connection method between the three-way valve 3 and the filter body 12.

[0069] Specifically, the filter body 12 is provided with a docking sleeve 123 that is in communication with the interior thereof, and the three-way valve 3 is inserted into the docking sleeve 123. In order to fix the three-way valve 3 on the docking sleeve 123 and facilitate adjustment of the installation direction of the three-way valve 3 on the docking sleeve 123, a reversing adjustment mechanism is provided to connect the docking sleeve 123 and the three-way valve 3 to the reversing adjustment mechanism for adjusting the installation direction of the three-way valve 3.

[0070] Specifically, the reversing adjustment mechanism includes a positioning member and a locking member. The three-way valve 3 and the docking sleeve 123 are provided with positioning members relative to each other, and the positioning members are used to limit the rotation of the three-way valve 3 relative to the docking sleeve 123. The locking member is provided through the docking sleeve 123 and the three-way valve 3 to limit the axial movement of the three-way valve 3 relative to the docking sleeve 123.

[0071] By configuring the three-way valve 3 to be plugged into the filter body 12, the valve can be adjusted to the appropriate installation angle and then directly inserted into the docking sleeve 123 for connection. This makes assembly very quick and space-saving, making it particularly suitable for installations in confined spaces. After the three-way valve 3 is inserted into the docking sleeve 123, a positioning member restricts rotation of the valve 3. A locking member, extending through the docking sleeve 123 and connecting the valve 3, restricts axial movement of the valve 3. This secures the valve 3 within the docking sleeve 123, ensuring a secure assembly between the valve 3 and the filter body 12.

[0072] Further, combined with Figure 9 and Figure 10 As shown, the positioning member adopts a method of cooperating positioning protrusions 1231 and clamping blocks 334. Multiple positioning protrusions 1231 are provided circumferentially on the inner wall of the docking sleeve 123, and multiple clamping blocks 334 are provided on the end surface of the three-way valve 3 inserted into the docking sleeve 123. The clamping blocks 334 are clamped on the positioning protrusions 1231. When the three-way valve 3 is inserted into place, the side surfaces of the clamping blocks 334 abut against the positioning protrusions 1231 at the corresponding positions, thereby limiting the rotation of the three-way valve 3.

[0073] In this embodiment, the number of blocks 334 is greater than the number of positioning protrusions 1231. By reducing the number of positioning protrusions 1231, the space occupied by the positioning protrusions 1231 can be reduced while ensuring the clamping limit of the blocks 334, which is beneficial to increasing the internal space of the docking tube 123 and improving the flow rate.

[0074] Specifically, no more than four positioning protrusions 1231 are provided, and the plurality of positioning protrusions 1231 are evenly spaced along the circumference of the docking sleeve 123. By providing one positioning protrusion 1231 to block the clamping block 334, the rotation of the three-way valve 3 can be limited. Providing an appropriate number of positioning protrusions 1231 can enhance the structural strength of the clamping connection and prevent damage to the clamping block 334 or the positioning protrusions 1231.

[0075] It is understandable that in other embodiments, the number of positioning protrusions 1231 may be the same as the number of blocking blocks 334 , and the blocking blocks 334 correspond one-to-one with the positioning protrusions 1231 and are inserted into the gaps between adjacent positioning protrusions 1231 .

[0076] Furthermore, the locking member adopts the second pin 18. Of course, in other embodiments, the locking member can also adopt a buckle or a clamp to limit the connection between the three-way valve 3 and the filter body 12 and limit the relative axial movement between the two. The specific structural form of the locking member is not limited here.

[0077] In this embodiment, combined with Figure 9 and Figure 10 As shown, the docking sleeve 123 has through-holes 1232 at both radial ends. The outer wall of the three-way valve 3 is provided with insertion slots 335 opposite the insertion holes 1232. The second pin 18 is bent and passes through the insertion holes 1232 and the insertion slots 335 at both ends. The second pin 18 is inserted into the insertion slots 335 to restrict the axial movement of the three-way valve 3.

[0078] Alternatively, as Figure 9 As shown, the insertion groove 335 surrounds the outer wall of the three-way valve 3 . When the three-way valve 3 is rotated to any angle, the second pin 18 can be inserted into the insertion groove 335 .

[0079] Furthermore, if Figure 9 and Figure 10 As shown, in order to improve the sealing between the three-way valve 3 and the docking tube 123, a sealing ring 6 is sandwiched between the three-way valve 3 and the docking tube 123. To facilitate the installation of the sealing ring 6, a mounting groove 336 is provided on the three-way valve 3, and the sealing ring 6 is disposed in the mounting groove 336.

[0080] Furthermore, in order to prevent the second pin 18 from falling out, an anti-falling member 17 is provided on the outer wall of the docking sleeve 123 . The anti-falling member 17 is arranged facing the second pin 18 to prevent the second pin 18 from falling out from the plug hole 1232 .

[0081] Specifically, the anti-slip member 17 includes a connecting portion 171 and an abutting portion 172. One end of the connecting portion 171 is connected to the docking sleeve 123. The connecting portion 171 is located on one side of the second pin 18. The abutting portion 172 is connected to the other end of the connecting portion 171. The abutting portion 172 extends toward the second pin 18 to block the second pin 18 and maintains a preset gap between the second pin 18 and the second pin 18. The second pin 18 is configured as a U-shape, with its two ends respectively inserted into the two insertion holes 1232 on the docking sleeve 123. The middle portion fits against the upper side of the docking sleeve 123. The abutting portion 172 blocks the middle portion of the second pin 18. By maintaining a certain gap between the abutting portion 172 and the second pin 18, assembly of the second pin 18 is facilitated. When the second pin 18 moves out a short distance, it will abut against the abutting portion 172, without affecting the position limit of the three-way valve 3.

[0082] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A magnetic filtering device, characterized in that: include: a filter body (12), wherein the filter body (12) is provided with a water inlet (121); a middle spacer sleeve (11) sleeved in the filter body (12), a water passage (10) being formed between the middle spacer sleeve (11) and the filter body (12), and a water outlet (113) being provided on the middle spacer sleeve (11); A water flow window (111) is provided on the middle spacer sleeve (11), the water flow window (111) and the water inlet (121) are staggered, and a magnet (2) for absorbing magnetic impurities in the water flow is provided in the middle spacer sleeve (11); the water flow enters the water flow channel (10) through the water inlet (121), enters the middle spacer sleeve (11) after passing through the water flow window (111), and then flows to the water outlet (113) and is discharged; A guide protrusion (112) is provided on the inner wall of the middle spacer sleeve (11), and the guide protrusion (112) is provided on the flow path of the water flow and is used to guide the water flow in the direction of the magnet (2); Two water-passing windows (111) are provided, and the two water-passing windows (111) are symmetrically arranged on both sides of the water inlet (121). The guide protrusion (112) is provided between the two water-passing windows (111). Guide slopes (1121) are symmetrically provided on both sides of the guide protrusion (112). The two guide slopes (1121) intersect at one end facing the magnet (2), so that water on both sides of the guide protrusion (112) flows out through the guide slopes (1121) and then flows towards each other.

2. The magnetic filtering device according to claim 1, characterized in that 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.

3. The magnetic filtering device according to claim 1, characterized in that The guiding inclined surface (1121) is configured as an arc-shaped inclined surface, and the arc-shaped inclined surface is smoothly connected to the inner wall of the middle spacer sleeve (11).

4. The magnetic filtering device according to claim 3, characterized in that The arc radius of the arc-shaped inclined surface is set to R5-R20mm.

5. The magnetic filtering device according to claim 2, characterized in that The middle spacer sleeve (11) is configured to be cylindrical, and the water-passing window (111) is provided on the arc surface of the middle spacer sleeve (11) facing away from the water inlet (121).

6. The magnetic filtering device according to claim 5, characterized in that The arc angle α of the middle spacer sleeve (11) facing the water inlet (121) is set to 150°-240°.

7. The magnetic filtering device according to claim 6, characterized in that The arc angle α is set to 180°.

8. The magnetic filtering device according to any one of claims 1 to 7, characterized in that: The water flow window (111) is arranged along the extension direction of the magnet (2).

9. The magnetic filtering device according to claim 8, characterized in that The upper side of the water flow window (111) is higher than the water inlet (121).

10. The magnetic filtering device according to any one of claims 1 to 7, characterized in that: A baffle plate (114) is provided on the inner wall of the middle spacer sleeve (11) facing the water outlet (113); the baffle plate (114) extends downward to the bottom side of the middle spacer sleeve (11) and forms a communication opening (115) with the middle spacer sleeve (11); the communication opening (115) is connected to the water outlet (113).

11. The magnetic filtering device according to any one of claims 1 to 7, characterized in that: The magnetic filtering device further comprises a three-way valve (3), the three-way valve (3) comprising a water inlet joint (31), a water outlet joint (32), and a connecting joint (33) connected to the filter body (12), the connecting joint (33) comprising an outer sleeve (331) and an inner sleeve (332) which are connected to each other, the inner sleeve (332) communicating with the water outlet joint (32) and the water outlet (113), a cavity (333) formed between the inner sleeve (332) and the outer sleeve (331), and the cavity (333) communicating with the water inlet joint (31) and the water inlet (121).

12. The magnetic filtering device according to claim 11, characterized in that An extension sleeve (4) is provided between the connecting joint (33) and the filter body (12), and the extension sleeve (4) is used to connect the intermediate spacer (11) and the connecting joint (33).

13. The magnetic filtering device according to claim 11, characterized in that The filter body (12) is connected to the three-way valve (3) via a reversing adjustment mechanism, which is used to adjust the installation direction of the three-way valve (3).

14. The magnetic filtering device according to any one of claims 1 to 7, characterized in that: An opening is provided at the top end of the filter body (12), and a cover body (13) is provided at the opening. The cover body (13) is plugged into the filter body (12) and presses against the middle spacer sleeve (11).

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