Foreign object removal device

Abstract

To provide a foreign matter removal device that can remove foreign matters in a fluid with good efficiency.SOLUTION: A foreign matter removal device has: a body part 2 in which an inlet 5 and an outlet 6 for a fluid are formed; a filter 20 provided in the body part 2; and a collection part 9 which is provided outside a flow range of the fluid, and collects foreign matters falling from a surface of the filter 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a foreign matter removal device for removing foreign matter from a fluid. [Background technology]

[0002] In heating systems that use hot water as a heat medium, the heating circuit through which the hot water circulates is often constructed of iron pipes, and foreign matter such as iron powder and rust can get into the hot water from the inner walls of these iron pipes.Iron powder can cause the pump that circulates the hot water to malfunction, and rust can cause problems such as pump malfunction and clogging of the heating circuit, so these foreign matter must be removed.

[0003] As devices for removing this foreign matter, those shown in the following Patent Documents 1 to 3 have been proposed.

[0004] In the device shown in Patent Document 1, the fluid flowing in from the inlet is dispersed and its flow rate is reduced as it passes through a filter cartridge 14 provided in a first chamber 11. Then, a magnet 18 provided on the outer wall of a second chamber 15 provided below the first chamber 11 attracts magnetic material in the fluid, and non-magnetic material is precipitated in the second chamber 15.

[0005] In the device shown in Patent Document 2, fluid flowing in from inlet 15 passes through shutoff valve 11 and reaches central chamber 27, where magnetic material in the fluid is attracted by magnet 34 located in the center of central chamber 27, and non-magnetic material is captured by filter 25. The non-magnetic material settles at the bottom of central chamber 27 when water flow is stopped.

[0006] In the device shown in Patent Document 3, fluid flows in through one of three ports 11, 12, and 13, passes through a filter element 20 and a cartridge 22 equipped with a magnet 21 provided in a chamber 10A, and flows out again through one of the ports 11, 12, and 13, with the magnet 21 attracting magnetic material in the fluid and the filter element 20 capturing non-magnetic material. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] US Patent Application Publication No. 2014 / 0367341 [Patent Document 2] International Publication No. 2018 / 207083 [Patent Document 3] European Patent Application Publication No. 3159313 Summary of the Invention [Problem to be solved by the invention]

[0008] In the configuration disclosed in Patent Document 1, the magnetic material is dispersed in the fluid by the filter cartridge 14, so the magnet 18 provided on the outer wall of the second chamber 15 has a problem in that it easily attracts magnetic material close to the inner wall of the second chamber 15, but has difficulty attracting other magnetic material. In addition, non-magnetic material that has settled to the bottom of the second chamber 15 is easily stirred up by the water current, which may result in insufficient removal of the non-magnetic material.

[0009] Furthermore, in the configuration disclosed in Patent Document 2, the fluid is agitated to some extent when it flows from inlet 15 into shutoff valve 11, causing magnetic particles to disperse within the fluid. As a result, only a portion of the magnetic particles can approach magnet 34 located in the center of central chamber 27, resulting in a problem of low adsorption efficiency for the magnetic particles. Furthermore, non-magnetic particles that have settled at the bottom of central chamber 27 may fly up when water is passed through again, potentially resulting in insufficient removal of the non-magnetic particles.

[0010] Furthermore, in the configuration of Patent Document 3, the filter element 20 and magnet 21 provided in the chamber 10A are slightly separated from the flow path directly connecting the ports 11, 12, and 13, which may reduce the efficiency of adsorption and removal of magnetic and non-magnetic materials.

[0011] Therefore, an object of the present invention is to efficiently remove foreign matter from a fluid. [Means for solving the problem]

[0012] In order to solve the above problems, the present invention provides: a main body portion having a fluid inlet and outlet formed therein; a deflection member provided inside the main body portion that deflects the flow direction of the fluid that has flowed into the main body portion so that the fluid flows along an inner wall of the main body portion; a foreign matter removal unit that removes foreign matter from the fluid deflected by the deflection member; A foreign matter removal device having the above structure was constructed.

[0013] In this way, foreign matter, which has a higher specific gravity than the fluid (generally water), flows mainly along the inner wall of the main body due to inertial force, and the foreign matter can be efficiently removed by the foreign matter removal section.

[0014] In the above configuration, The deflection member can be a V-shaped plate that extends vertically and is V-shaped in a plan view, which branches the fluid flowing in from the inlet toward the inner wall of the main body and deflects the flow direction of the branched fluid vertically so that the branched fluid flows along the inner wall of the main body, and the central protrusion of the V-shaped plate can be arranged so as to face the inlet side.

[0015] In this way, the fluid flowing in from the inlet can be smoothly diverged toward the inner wall of the main body, and the foreign matter removal section can efficiently remove foreign matter.

[0016] In the configuration in which the deflection member is a V-shaped plate, It is preferable that the V-shaped plate has cutouts at its lower end, where both ends of the V shape are cut out.

[0017] In this way, the cutout portion functions as a bypass passage for the fluid, and the flow velocity near the lower end of the deflection member can be reduced to a certain extent, thereby further improving the efficiency of foreign matter removal by the foreign matter removal section.

[0018] or, The deflection member may have a short-circuit pipe extending from the inlet toward the wall surface opposite the inlet, and a deflection plate that divides the inside of the main body into upper and lower sections and deflects the fluid that passes through the short-circuit pipe downward, and the fluid deflected by the deflection plate may be configured to turn at the lower end of the main body and pass through the inlet side and head upward.

[0019] In this way, the shunt pipe allows the fluid flowing in from the inlet to flow straight toward the opposing wall surface, and the deflector plate causes foreign matter contained in the fluid to gather near the wall surface, making it possible to more efficiently remove foreign matter from the fluid.

[0020] In the configuration having the shunt pipe, It is preferable that a return passage be formed on the outer periphery of the outlet side of the short-circuit pipe, for guiding the fluid flowing along this outer periphery to the outlet side of the short-circuit pipe.

[0021] In this way, the fluid flowing at the outlet side of the shunt pipe, which is difficult to remove by the foreign matter removal unit, i.e., in an area slightly away from the inner wall of the main body, can be returned within the main body through the return passage, thereby enabling more efficient removal of foreign matter.

[0022] In order to solve the above problems, the present invention provides: a main body portion having a fluid inlet and outlet formed therein; a filter provided inside the main body; a collection section provided outside the flow range of the fluid, which collects foreign matter that falls off from the surface of the filter; A foreign matter removal device having the above structure was constructed.

[0023] In addition, in each of the above configurations having a main body, a deflection member, and a foreign matter removal unit, It is preferable that the device has a filter provided inside the main body and a collector provided outside the range of flow of the fluid for collecting foreign matter that falls off the surface of the filter.

[0024] In this way, the collection section is not affected by the flow of the main body section, so foreign matter that has fallen off the surface of the filter can be prevented from being blown up by the fluid, and foreign matter in the fluid can be efficiently removed.

[0025] In the configuration having the filter, The filter is preferably arranged so that the entire amount of fluid passes through the filter, or so that the fluid is divided into a flow path that passes through the filter and a flow path that flows downward along the surface of the filter.

[0026] In this way, by positioning the filter so that the entire amount of fluid passes through the filter, the efficiency of removing foreign matter can be improved. Also, by positioning the filter so that the fluid branches, the flow component passing through the filter collects foreign matter near the surface of the filter, and the flow component flowing downward along the filter surface causes the foreign matter near the surface of the filter to fall successively into the collection section, so that foreign matter can be collected while preventing clogging of the filter without interrupting the flow of the fluid.

[0027] In the configuration having the filter and the collection unit, It is preferable that the main body portion and the collection portion are connected by a thin tube portion having a smaller horizontal cross-sectional area than the main body portion, or that they are separated by a partition member having a through hole formed therein to allow foreign matter falling from the filter to pass downward.

[0028] In this way, by connecting the main body and the collection part with a thin tube part, the collection part is not affected by the flow of the main body, so that foreign matter collected in the collection part from the surface of the filter downward can be prevented from being blown up by the fluid. Also, a similar effect can be achieved by separating the main body and the collection part with a partition member.

[0029] In the configuration having the filter and the collection unit, It is preferable that the collecting section is provided with a cock valve for opening the collecting section to discharge foreign matter, and that the cock valve is attached to the collecting section by a pin fastener.

[0030] This allows the cock valve to be easily attached to the collection section, improving work efficiency.

[0031] In each of the above configurations, The foreign matter removal portion is preferably a magnet provided on the outer wall of the main body portion so as to follow the flow of the fluid deflected by the deflection member.

[0032] In this way, the magnetic material in the foreign matter can be easily attracted by the magnet, and by removing the magnet from the outer wall of the main body, the attracted state of the magnetic material can be released and the magnetic material can be collected.

[0033] In the configuration in which the foreign matter removal unit is a magnet, It is preferable that the magnet is attracted by magnetic force to a magnet holder at least a portion of which is made of a magnetic material, and that the magnet holder is fixed to the outer wall of the main body.

[0034] This eliminates the need to form a pocket in the magnet holder to hold the magnet, allowing the magnet to come into direct contact with the outer wall of the main body. This allows the magnetic force to be applied efficiently to the inside of the main body. Furthermore, if at least a portion of the magnet holder is made of a magnetic material, the magnet holder acts as a yoke, preventing the magnetic field lines from spreading outward. This increases the magnetic flux density inside the main body, allowing the magnetic material in the foreign object to be attracted more efficiently.

[0035] In the configuration in which the foreign matter removal unit is a magnet, The magnet may be an electromagnet.

[0036] In this way, by cutting off the power supply to the electromagnet, the magnetic material attracted to the electromagnet can be easily released and collected, allowing for smooth maintenance work.

[0037] In each of the above configurations, It is preferable that the foreign matter removal section is a resistance member that imparts flow resistance to the fluid flowing along the inner wall of the main body section, and is configured so that foreign matter in the fluid whose flow rate has been reduced by the flow resistance imparted by the resistance member falls downward.

[0038] In this way, both magnetic and non-magnetic materials in the foreign matter can be removed without using a magnet, thereby reducing material costs.

[0039] In the configuration in which the foreign matter removal unit is the resistance member, The resistance member can have an intake port that takes in fluid flowing along the inner wall of the main body portion, and an abutment wall against which the fluid taken in from the intake port hits, and can be configured so that foreign matter in the fluid that is given flow resistance by the abutment wall falls downward.

[0040] In this way, both magnetic and non-magnetic materials in the foreign matter can be efficiently removed with a simple structure. [Effects of the Invention]

[0041] According to the above-described configuration of the present invention, foreign matter in the fluid can be efficiently removed. [Brief explanation of the drawings]

[0042] [Figure 1] 1 is a cross-sectional view showing a first embodiment of a foreign matter removal device according to the present invention; [Figure 2] Cross-sectional view along line II-II in Figure 1 [Figure 3] FIG. 2 is a perspective view showing a magnet and a magnet holder of the foreign matter removal device shown in FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view showing a first modified example of the foreign matter removal device shown in FIG. [Figure 5] FIG. 5 is a perspective view showing a partition member of the foreign matter removal device shown in FIG. 4. [Figure 6] FIG. 2 is a cross-sectional view showing a second modified example of the foreign matter removal device shown in FIG. [Figure 7] Cross-sectional view taken along line VII-VII in Figure 6 [Figure 8] Cross-sectional view taken along line VIII-VIII in Figure 6 [Figure 9] FIG. 7 is a perspective view showing a partition member of the foreign matter removal device shown in FIG. 6. [Figure 10] FIG. 2 is a cross-sectional view showing a third modified example of the foreign matter removal device shown in FIG. [Figure 11] Cross-sectional view taken along line XI-XI in Figure 10 [Figure 12] FIG. 10 is a cross-sectional view showing a fourth modification of the foreign matter removal device shown in FIG. [Figure 13] FIG. 10 is a cross-sectional view showing a fifth modification of the foreign matter removal device shown in FIG. [Figure 14] FIG. 10 is a cross-sectional view showing a second embodiment of the foreign matter removal device according to the present invention. [Figure 15] Cross-sectional view taken along line XV-XV in Figure 14 [Figure 16] 15 is a perspective view of the foreign matter removal device shown in FIG. 14. [Figure 17] FIG. 15 is a perspective view showing a cover of the foreign matter removal device shown in FIG. 14. [Figure 18]FIG. 15 is a perspective view showing a deflection member of the foreign matter removal device shown in FIG. 14; [Figure 19] FIG. 15 is a cross-sectional view of a main part showing a first modified example of the foreign matter removal device shown in FIG. 14. [Figure 20] FIG. 15 is a cross-sectional view of a main part showing a second modified example of the foreign matter removal device shown in FIG. 14. [Figure 21] FIG. 15 is a cross-sectional view of a main part showing a third modified example of the foreign matter removal device shown in FIG. 14. [Figure 22] FIG. 10 is a cross-sectional view showing a third embodiment of the foreign matter removal device according to the present invention. [Figure 23] Cross-sectional view taken along line XXIII-XXIII in Figure 22 [Figure 24] Cross-sectional view taken along line XXIV-XXIV in Figure 22 DETAILED DESCRIPTION OF THE INVENTION

[0043] A first embodiment of a foreign matter removal device 1 according to the present invention will be described with reference to the drawings. This foreign matter removal device 1 is a device for removing foreign matter in a heating circuit through which hot water circulates in a heating device that uses hot water (heating water), which is a fluid, as a heat medium, and as shown in Figures 1 and 2, its main components are a main body 2, a deflection member 3, and a foreign matter removal unit 4. The arrows shown in Figure 1 indicate the flow paths of the fluid, and differences in their widths roughly correspond to differences in flow rate.

[0044] The main body 2 is a cylindrical member having a fluid inlet 5 and outlet 6 formed at its upper end and an open bottom. The inlet 5 and outlet 6 are located above the center of the cylinder's height and on opposite sides of the cylinder's circumference, and are formed at approximately the same height on the cylinder. The inner diameter of the inlet 5 is slightly larger than the inner diameter of the outlet 6. The inlet 5 is provided with an inlet pipe connection 7, and the outlet 6 is provided with an outlet pipe connection 8, so that they can be connected to other pipes that make up the heating circuit. Note that the vertical positional relationship between the inlet 5 and outlet 6 is not limited to this embodiment and may be modified. Furthermore, the shape of the main body 2 is not limited to a cylindrical shape and may be modified as appropriate, such as an elliptical or rectangular cylinder.

[0045] The lower end of the main body 2 is provided with a collection unit 9, which is cylindrical and has an open top and a closed bottom, and has approximately the same diameter as the main body 2. The main body 2 and collection unit 9 are connected by a so-called snap-lock mechanism, in which the two are inserted axially into each other and then rotated circumferentially by a predetermined small angle to lock them. A cock valve 10, which has a hole for a hex wrench, is attached to the collection unit 9 with a pin fastener 11. A drain port 12 formed at the bottom of the collection unit 9 is secured with a plug 13 with a pin fastener 14. When the plug 13 is removed from the drain port 12 and the cock valve 10 is opened, the fluid in the main body 2 can be discharged along with the foreign matter collected by the collection unit 9. The cock valve 10 and plug 13 are attached to the wall surface of the collection unit 9 on the outlet 6 side. In this embodiment, resin is used as the material for the main body 2 and collection unit 9, but other non-magnetic materials may also be used. The bottom surface of the collection section 9 is formed with an inclined surface 15 that slopes downward as it approaches the cock valve 10. Note that by optimizing the arrangement of the cock valve 10 and other components, it may be possible to omit the inclined surface 15.

[0046] A partition member 16 is provided between the main body 2 and the collection section 9 to separate them. This partition member 16 has a cone section 17 whose diameter tapers downward and a tubular section 18 extending axially downward from the upper end of the cone section 17. Ribs 19 are formed on the inner surface of the main body 2, and the ribs 19 contact the partition member 16 to position the partition member 16 in the vertical direction. Ribs 21 for holding a filter 20 (described later) are also formed on the inner wall of the main body 2. The ribs 21 fit into slits 22 formed in the partition member 16 to position the partition member 16 in the circumferential direction. A rectangular through-hole 23 is formed near the inlet 5 of the cone section 17, and a circular through-hole 24 is formed in the center of the cone section 17, each of which connects the main body 2 and the collection section 9. A protrusion 25 protruding toward the downstream side is formed on one upstream side of the rectangular through-hole 23.

[0047] Rectangular through-hole 23, circular through-hole 24, and drain outlet 12 are aligned in this order in one direction. Rectangular through-hole 23 is eccentric in one direction relative to circular through-hole 24 formed in the center of cone portion 17. Therefore, when cock valve 10 and stopper 13 are opened, a flow toward drain outlet 12 occurs within collection portion 9 as fluid is discharged from both rectangular and circular through-holes 23, 24.

[0048] The deflection member 3 is a V-shaped plate 26 that extends vertically and is V-shaped in a plan view. The deflection member 3 deflects the fluid that flows in from the inlet 5 toward the inner wall of the main body 2 and deflects the flow direction of the branched fluid vertically so that the branched fluid flows along the inner wall of the main body 2. The V-shaped plate 26 has a lower end that extends below the inner bottom surfaces of the inlet 5 and the outlet 6 so that the fluid that flows in from the inlet 5 does not flow horizontally and directly out of the outlet 6. Both ends of the V-shaped plate 26 abut against the inner walls of the main body 2. The V-shaped plate 26 divides the cylindrical interior of the main body 2 into an inlet 5 side and an outlet 6 side in a plan view. The lower end of the V-shaped plate 26 has notches 27 formed by cutting out both ends of the V shape.

[0049] The magnets 28 serving as the foreign matter removal unit 4 are provided on the outer wall of the main body 2 so as to follow the flow of the fluid deflected by the deflection member 3 (V-shaped plate 26). More specifically, two of the magnets 28 are provided as a pair below the lower end of the V-shaped plate 26 and downstream of the filter 20 (described later). The attachment position of the magnets 28 on the outer wall of the main body 2 can be determined as appropriate, but is preferably between the side of the main body 2 (midway between the inlet 5 and the outlet 6) and the side of the outlet 6. Depending on the arrangement of the filter 20, the magnets 28 may also be provided upstream of the filter 20. As shown in FIG. 3 , the magnets 28 are flat neodymium magnets attracted and held by a magnet holder 29. They are sandwiched in surface contact with ribs 30 formed on the outer wall of the main body 2 and fixed in place by pin fasteners 31. A flat surface 32 is formed on the main body 2 at the contact portion of the magnets 28. As a result, the outer wall (flat portion 32) of the main body portion 2 and the magnet 28 are in surface contact.

[0050] A filter 20 is disposed in the flow path of the fluid flowing through the main body 2. The filter 20 is a wire mesh having a substantially rectangular flat plate shape, and is positioned at a predetermined mounting position by having both ends sandwiched between ribs 21 formed on the inner wall of the main body 2 and a lower end inserted into a rectangular through-hole 23 formed in the cone portion 17 of the partition member 16 and inserted between one downstream side of the through-hole 23 and a protrusion 25. The filter 20 is disposed so as to branch the fluid into a flow path that passes through the filter 20 and a flow path that flows downward along the surface of the filter 20.

[0051] The following describes the operation of the foreign matter removal device 1 according to the first embodiment when removing foreign matter (magnetic material such as iron powder and non-magnetic material such as rust) contained in hot water as a fluid.

[0052] Fluid containing foreign matter flows into the main body 2 through the inlet 5 and primarily passes through the filter 20. A V-shaped plate 26 is provided behind the filter 20, causing the fluid flowing in from the inlet 5 to branch left and right toward the inner wall of the main body 2 and deflect downward. Non-magnetic substances such as rust contained in the fluid are collected near the surface of the filter 20 by the flow components passing through the filter 20, and then gradually fall off due to the flow components moving downward along the surface of the filter 20. These foreign matter pass through the rectangular through-holes 23 formed in the cone portion 17 of the partition member 16 and are collected by the collection unit 9. This configuration allows foreign matter to be collected without interrupting the flow of the fluid and while preventing clogging of the filter 20.

[0053] Of the foreign matter in the fluid that is branched left and right toward the inner wall of the main body 2 by the V-shaped plate 26, magnetic materials such as iron powder are attracted by the magnetic force of the magnets 28 provided on the outer wall of the main body 2. At this time, if the fluid flow velocity is high, it is difficult for the magnetic material to be attracted to the magnets 28, and even if it is attracted, there is a risk that it will peel off and be carried away. However, since the flow velocity is relatively low near the point where the fluid turns from downward to upward, by providing the magnets 28 in this vicinity, magnetic foreign matter can be effectively attracted.

[0054] The rectangular through-holes 23 and circular through-holes 24 formed in the cone portion 17 are sized appropriately to minimize the inflow of fluid into the collection portion 9 during water flow. For example, when the diameter of the main body portion 2 is 60 mm, the width of the rectangular through-holes 23 is in the range of 1.8 to 12 mm, preferably 3 to 9 mm, and the diameter of the circular through-holes 24 is in the range of 5 to 30 mm, preferably 8 to 20 mm. By separating the main body portion 2 and the collection portion 9 with the partition member 16, the flow of the main body portion 2 does not affect the collection portion 9, and there is no risk of foreign matter (non-magnetic material) collected by the collection portion 9 being blown up during water flow. This allows for efficient removal of foreign matter from the fluid.

[0055] Furthermore, in this embodiment, the cutout 27 formed at the lower end of the V-shaped plate 26 functions as a bypass path for the fluid, reducing the flow velocity near the lower end of the deflection member 3 to a certain extent, thereby optimizing the flow near the magnet 28. This prevents the magnetic material attracted to the magnet 28 from being peeled off by the fluid, particularly when the fluid flow rate is high, thereby further improving the attraction efficiency of the magnetic material. Furthermore, by forming the cutout 27, the flow of the fluid can be controlled and the magnetic material can be concentrated near the height where the magnet 28 is installed, which is expected to further improve the attraction efficiency of the magnetic material. It is possible to omit the cutout 27 by optimizing the fluid flow direction and the position of the magnet 28 through design changes to each component.

[0056] When magnet 28 is removed from main body 2 together with magnet holder 29 after water flow is stopped, magnetic materials such as iron powder attracted to magnet 28 fall off and are collected by collection unit 9 through circular through-hole 24 formed in cone portion 17 of partition member 16. When plug 13 provided on drain outlet 12 is removed and cock valve 10 provided on collection unit 9 is opened while water flow is stopped, the foreign matter (magnetic and non-magnetic) collected in collection unit 9 is discharged through drain outlet 12 along with the fluid in main body 2. In this configuration, when cock valve 10 and plug 13 are opened, a flow toward drain outlet 12 is generated within collection unit 9 as the fluid is discharged through both rectangular and circular through-holes 23, 24. Furthermore, because inclined surface 15 is formed on the bottom surface of collection unit 9, the foreign matter can be smoothly discharged from drain outlet 12 along with the fluid.

[0057] In this embodiment, the filter 20 is arranged so as to branch the fluid into a flow path that passes through the filter 20 and a flow path that flows downward along its surface, but it is also possible to arrange the filter 20 just before the outlet 6 so that the entire amount of fluid passes through the filter 20.

[0058] 4 and 5 show a first modified example of the foreign matter removal device 1 according to the first embodiment. This first modified example has the same basic configuration as the first embodiment, but differs in the configuration of the partition member 16. That is, the partition member 16 according to the first embodiment has a rectangular through hole 23 formed near the inlet 5 of the cone portion 17 and a circular through hole 24 formed in the center of the cone portion 17, whereas the partition member 16 according to the first modified example has only the rectangular through hole 23 formed near the inlet 5 of the cone portion 17, and an inclined portion 33 formed in the center of the cone portion 17 that slopes downward toward the rectangular through hole 23.

[0059] According to this first modified example, the entire amount of fluid passes through filter 20, so that non-magnetic materials are not lost to filter 20. Furthermore, magnetic materials pass through filter 20 and are attracted to magnet 28. However, when magnet 28 is removed from main body 2 together with magnet holder 29 after water flow is stopped, the magnetic materials attracted to magnet 28 fall off and slide down toward filter 20, guided by inclined portion 33 formed on cone portion 17 of partition member 16. They then pass through filter 20 in the opposite direction and are collected by collection unit 9 through rectangular through-hole 23 (see arrow f in FIG. 4 ). When water flow is stopped, plug 13 provided on drain outlet 12 is removed and cock valve 10 provided on collection unit 9 is opened, and the foreign materials (magnetic and non-magnetic materials) collected by collection unit 9 are discharged through drain outlet 12 together with the fluid in main body 2.

[0060] A second modified example of the foreign matter removal device 1 according to the first embodiment will be described with reference to Figures 6 to 9. In this second modified example, a resistance member 34 that applies flow resistance to the fluid flowing along the inner wall of the main body 2 is used as the foreign matter removal unit 4 instead of the magnet 28, and foreign matter in the fluid that is given resistance by this resistance member 34 falls downward.

[0061] Resistance member 34 has an inlet 35 that takes in fluid flowing along the inner wall of main body 2, and an abutment wall 36 against which the fluid taken in from inlet 35 abuts. Cone portion 17 of partition member 16 is formed with a drop port 37 that allows foreign matter in the fluid that has been given flow resistance by abutment wall 36 to fall downward. Drop port 37 is a through-hole that communicates with collection unit 9.

[0062] According to this second variant, since a magnet 28 is not required, component costs can be reduced, and since foreign matter can be constantly collected by the collection section 9 without stopping the flow of water, maintenance work related to collecting foreign matter can be reduced.

[0063] 10 and 11 show a third modified example of the foreign matter removal device 1 according to the first embodiment. The basic configuration of this third modified example is the same as that of the first embodiment, but differs in that an auxiliary filter 38 is provided that extends from the upper end of the main body 2 to the cone 17, closer to the outlet 6 than the circular through-hole 24 formed in the cone 17. This auxiliary filter 38 is made of a flat wire mesh, and is configured so that the entire amount of fluid flowing from the inlet 5 to the outlet 6 passes through this auxiliary filter 38.

[0064] By providing the auxiliary filter 38 in this manner, even if foreign matter collected by the collection unit 9 is blown up toward the main body 2 as the fluid flows, the blown up foreign matter is captured by the auxiliary filter 38, preventing the foreign matter from flowing out of the outlet 5. Furthermore, the auxiliary filter 38 is slightly spaced from the outlet 6, ensuring a sufficient cross-sectional area (filter area) for the fluid passing through the auxiliary filter 38. Therefore, even if the fluid contains a large amount of foreign matter, clogging of the auxiliary filter 38 can be prevented as much as possible.

[0065] If the filter 20 (including the auxiliary filter 38) becomes clogged while water is passing through, the resistance to water flow increases, affecting the pump's current and voltage values, etc. Therefore, it is preferable to use various sensors to detect fluctuations in water pressure and pump current and voltage values, and to control the system so that water flow is stopped and restarted when it is determined that the filter 20 is clogged.

[0066] A fourth modified example of the foreign matter removal device 1 according to the first embodiment is shown in Fig. 12. This fourth modified example also has the same basic configuration as the first embodiment, but differs in that an extension tube portion 39 is connected to the lower end of the cone portion 17, and a cylindrical filter 40 is provided on this extension tube portion 39 and reaches the inner bottom surface of the collection portion 9. The lower end of the extension tube portion 39 corresponds to the through hole 24 in the first embodiment. This cylindrical filter 40 is made of a wire mesh formed in a cylindrical shape, and is configured so that the entire amount of fluid flowing from the inlet 5 to the outlet 6 passes through the filter 20 or the cylindrical filter 40.

[0067] By providing the cylindrical filter 40 in this manner, even if foreign matter captured in the collection section 9 is blown up by the flow that passes through the through hole 23 formed in the cone section 17 and flows into the collection section 9, and then returns to the main body section 2 through the through hole 24 formed in the extension tube section 39, the cylindrical filter 40 can prevent the foreign matter from flowing out into the main body section 2.

[0068] A fifth modified example of the foreign matter removal device 1 according to the first embodiment is shown in FIG. 13 . This fifth modified example does not include a filter 20, but instead uses only an auxiliary filter 38 to remove foreign matter. It also differs from the second modified example in that a through-hole 41 is formed closer to the inlet than the circular through-hole 24 in the center of the cone portion 17. With this configuration, when the stopper 13 provided at the drain outlet 12 is removed and the cock valve 10 provided at the collection unit 9 is opened while water is not flowing, the fluid within the main body 2 is discharged through the circular through-hole 24. At the same time, the fluid is also discharged from the through-hole 41 formed closer to the inlet 5 (see arrow f in FIG. 13 ). The fluid discharged from the through-hole 41 flows toward the drain outlet 12, allowing the foreign matter (magnetic and non-magnetic) collected in the collection unit 9 to be smoothly discharged along with the fluid. The through-hole 41 is not a required component and may be omitted as appropriate.

[0069] A second embodiment of the foreign matter removal device 1 according to the present invention is shown in Figures 14 to 16. Similar to the first embodiment, this foreign matter removal device 1 mainly comprises a main body 2, a deflection member 3, and a foreign matter removal unit 4.

[0070] The main body 2 is a cylindrical member with an open top and formed with an inlet 5 and outlet 6 for the fluid. The outlet 6 is formed above the inlet 5 and on the opposite side of the cylinder in the circumferential direction. The inner diameter of the inlet 5 is slightly larger than the inner diameter of the outlet 6. The inlet 5 is formed with an inlet pipe connection 7, and the outlet 6 is formed with an outlet pipe connection 8, so that they can be connected to other pipes that make up the heating circuit. Note that the vertical positional relationship between the inlet 5 and the outlet 6 is not limited to this embodiment and may be reversed. Furthermore, the shape of the main body 2 is not limited to a cylindrical shape and may be appropriately changed to an elliptical cylindrical shape, a square cylindrical shape, or the like.

[0071] A reduced diameter section 42, which gradually reduces in diameter downward, is formed on the lower end side of the main body 2. A collection section 9 is provided below the reduced diameter section 42. The main body 2 and collection section 9 are connected by a thin tube section 43 formed in the reduced diameter section 42. This collection section 9 is provided outside the flow range of the fluid flowing through the main body 2, and has the function of temporarily collecting foreign matter in the fluid.

[0072] A cock valve 10 with a handle is attached to the collection unit 9 with a pin fastener 11. A plug 13 is fixed to a drain port 12 formed at the bottom of the collection unit 9 with a pin fastener 14. When the plug 13 is removed from the drain port 12 and the cock valve 10 is opened, the fluid in the main body 2 can be discharged along with the foreign matter collected by the collection unit 9. In this embodiment, the main body 2 and the collection unit 9 are integrally formed, but they can also be formed as separate parts. In this embodiment, a resin material is used as the material for the main body 2 and the collection unit 9, but other non-magnetic materials may also be used.

[0073] A lid 44 is provided on the opening at the top of the main body 2. As shown in FIG. 17 , a contact member 45 extends downward from the underside of the lid 44, capable of contacting the top of the deflector 3. The contact member 45 has a curved shape formed by cutting a portion of a cylinder and is disposed along the inner wall of the main body 2. While the contact member 45 may always be in contact with the top of the deflector 3, in this embodiment, a slight gap (approximately 0.5 mm) is designed between the two. The deflector 3 and the contact member 45 come into contact only when the deflector 3 is displaced upward from its predetermined installation position by the amount of the gap. This prevents the deflector 3 from being displaced from its predetermined installation position due to vibrations during transport of the assembled foreign matter removal device 1 or water pressure during water flow.

[0074] The deflection member 3 has a short-circuit pipe 46 extending from the inlet 5 side toward the wall surface facing the inlet 5, and a deflection plate 47 that roughly divides the inside of the main body 2 into an area where the fluid flows mainly downward and an area where the fluid flows mainly upward, and deflects the fluid downward that has passed through the short-circuit pipe 46. The fluid deflected by the deflection plate 47 turns at the lower end (near the reduced diameter portion 42) of the main body 2 and flows upward through the inlet 5 side.

[0075] The deflector plate 47 has an inclined portion 48 that faces the opposing wall surface and slopes downward toward its tip, and a partition wall 49 that connects the inclined portion 48 to the shunt pipe 46. A discharge gap 50 is formed between the opposing wall surface and the tip (the inclined lower end) of the inclined portion 48, allowing foreign matter that has fallen off the filter 20 (described below) to fall toward the collection unit 9 when water flow is stopped. In this embodiment, the diameter of the main body 2 is 60 mm, so the size of the discharge gap 50 is approximately 5 mm, but this can be changed appropriately within a range of approximately 1 to 20 mm. The size of the discharge gap 50 can also be changed appropriately depending on the diameter of the main body 2.

[0076] In this embodiment, as shown in Fig. 18, the deflection member 3 (short-circuit pipe 46 and deflection plate 47) is integrally formed. A return passage 51 is formed on the outlet-side outer peripheral edge of the short-circuit pipe 46, and the return passage 51 guides the fluid passing between the short-circuit pipe 46 and the partition wall 49 of the deflection plate 47 and flowing upward along this outer peripheral edge to the outlet side of the short-circuit pipe 46. Reinforcing ribs 52 are provided at predetermined intervals on the return passage 51, ensuring rigidity between the short-circuit pipe 46 and the partition wall 49. The integral deflection member 3 is positioned at a predetermined mounting position by abutting against a rib 53 formed inside the main body 2.

[0077] Magnets 28 serving as foreign matter removal section 4 are provided on the outer wall of main body 2 so as to follow the flow of fluid deflected by deflection member 3 (short-circuit pipe 46 and deflection plate 47). More specifically, two magnets 28 are provided as a pair on the sides below the height position of short-circuit pipe 46. The attachment position of magnets 28 on the outer wall of main body 2 can be determined as appropriate, but is preferably between the side of inlet 5 and the side of main body 2 (the midpoint between inlet 5 and outlet 6).

[0078] In this embodiment, a flat neodymium magnet is used as magnet 28. Magnet 28 is magnetically attracted to magnet holder 29 made of magnetic steel, and magnet holder 29 is sandwiched in a surface-to-surface contact state between ribs 30 formed on the outer wall of main body 2 and fixed with pin fasteners 31. A flat portion 32 with a flat surface is formed at the abutment portion of main body 2 with magnet 28. This allows surface contact between magnet 28 and the outer wall (flat portion) of main body 2.

[0079] A filter 20 is disposed immediately before the outlet 6 of the main body 2. The filter 20 is positioned at a predetermined installation position by abutting against a rib 53 formed inside the main body 2. In this embodiment, a wire mesh is used as the filter 20. The filter 20 has a curved shape formed by cutting off a portion of a cylinder, and is disposed along the inner wall of the main body 2 just before the outlet 6 so that the entire amount of fluid passes through the filter 20. The upper end of the filter 20 is located near the lower surface of the lid 44, and the lower end is located several millimeters above the lower end of the inclined portion 48 of the deflector plate 47.

[0080] The following describes the operation of the foreign matter removal device 1 according to the second embodiment when removing foreign matter (magnetic material such as iron powder and non-magnetic material such as rust) contained in a fluid (for example, hot water).

[0081] The fluid containing foreign matter flows into the main body 2 through the short-circuit pipe 46 of the deflector 3 provided at the inlet 5. The straight short-circuit pipe 46 allows the fluid to flow in a straight line, causing it to flow toward the wall surface facing the inlet 5 (to the right in FIG. 14 ). The fluid is then deflected downward by the inclined portion 48 formed on the deflector 3, turns at the lower end of the main body 2, and flows upward through the inlet 5. Because the foreign matter has a higher specific gravity than the fluid, an inertial force acts on the foreign matter as the fluid is deflected within the main body 2. The size of the foreign matter is very small, for example, iron powder on the order of μm, so it flows smoothly along the inner wall of the main body 2 without stagnation. The larger the size of the foreign matter, the greater the inertial force, making it easier for the foreign matter to flow along the inner wall.

[0082] In this embodiment, the deflection plate 47 of the deflection member 3 is formed with an inclined portion 48 that slopes downward toward its tip, thereby smoothly deflecting the fluid downward and reducing water flow resistance, but it is also possible to configure the deflection member 3 without forming this inclined portion 48.

[0083] Of the foreign matter flowing upward along the inner wall of the main body 2, magnetic matter such as iron powder is attracted by the magnetic force of the magnet 28 attached to the outer wall of the main body 2. This magnetic foreign matter flows along the inner wall surface of the main body 2 together with the fluid, but if the fluid flow velocity is high, it is difficult for the magnetic matter to be attracted to the magnet 28, and even if it is attracted, there is a risk that it will peel off and be washed away. For this reason, it is preferable to regulate the upper limit of the amount of water flowing into the main body 2 (for example, to 10 L / min or less) so that the foreign matter is stably attracted to the magnet 28.

[0084] The magnet 28 is attracted and held by a magnet holder 29 made of a magnetic material. This configuration makes it easier for the magnet 28 to be exposed from the magnet holder 29 compared to when a pocket is formed in the magnet holder 29 and the magnet 28 is housed and held within the pocket. Furthermore, a flat portion 32 is formed on the outer wall of the main body 2, and the magnet 28 is in surface contact with this flat portion 32. This allows the magnetic force of the magnet 28 to act directly on the inside of the main body 2, effectively attracting magnetic foreign matter. Furthermore, since the magnet holder 29 is made of a magnetic material, it acts as a yoke, preventing magnetic field lines from spreading outward. This increases the magnetic flux density inside the main body 2, allowing for more efficient attraction of magnetic foreign matter. Furthermore, the magnet holder 29 is stably held by a total of three flat surfaces: a rib 30 and two flat portions formed on the outer wall of the main body 2, preventing the magnet from shifting position.

[0085] In this embodiment, the magnet 29 is provided on the side below the height position of the short-circuit pipe 46, but the position is not particularly limited, and it may be provided at any position along the circumferential direction of the cylindrical main body 2 as long as it is below the height position of the short-circuit pipe 46. Also, it may be provided on the lower surface of the reduced diameter portion 42 formed on the lower end side of the main body 2.

[0086] Below the height position of the short-circuit pipe 46, foreign matter in the fluid tends to gather near the inner wall due to inertial force caused by deflection, and the flow rate is relatively slow, so magnetic material in the foreign matter can be efficiently attracted by the magnet 28. At the same height as the short-circuit pipe 46, the short-circuit pipe 46 itself narrows the flow path width, increasing the flow rate, and above the height position of the short-circuit pipe 46, foreign matter tends to separate from the inner wall of the main body 2, so in either case, the adsorption efficiency may decrease.

[0087] Most of the magnetic foreign matter in the fluid flows along the inner wall of the main body 2 due to the inertial force acting on the foreign matter, but some foreign matter may flow at a position away from the inner wall (near the center of the main body 2). In this case, the magnetic force of the magnet 28 does not reach the foreign matter, making it difficult to attract it. Therefore, if a return passage 51 is formed on the outer peripheral edge of the outlet side of the short-circuit pipe 46, an ejector effect caused by the flow of fluid from the short-circuit pipe 46 into the main body 2 will draw some of the fluid flowing at a position away from the inner wall into the outlet side of the short-circuit pipe 46, allowing the fluid to return within the main body 2. This allows the magnetic material in the foreign matter to be more efficiently attracted and removed.

[0088] In this embodiment, reinforcing ribs 52 are provided at predetermined intervals in the return passage 51 to ensure the rigidity between the shunt pipe 10 and the partition wall 49, but by providing these reinforcing ribs 52 on the upper end side of the return passage 51 and extending them further toward the inclined portion 48, the effect of improving the rigidity provided by these reinforcing ribs 52 can be further enhanced. Note that this return passage 51 may be omitted in some cases.

[0089] The fluid flowing upward through the shunt pipe 46 is further deflected horizontally (to the right in FIG. 14 ) by the lid 44 attached to the upper opening of the main body 2, passes through the filter 20, and flows out from the outlet 6. Non-magnetic substances such as rust contained in the fluid are temporarily captured by the filter 20. When the water flow is stopped, the non-magnetic substances fall off the filter 20, pass through the discharge gap 50 and the narrow tube portion 43, and are collected by the collection portion 9.

[0090] The diameter (inner diameter) of the thin tube portion 43 is set to an appropriate diameter that minimizes the inflow of fluid into the collection portion 9 when water is passing through. For example, when the diameter of the main body portion 2 is 60 mm, the diameter of the thin tube portion 43 can be set to a range of 5 to 30 mm, preferably 8 to 20 mm. By connecting the main body portion 2 and the collection portion 9 with the thin tube portion 43 in this way, the flow of the main body portion 2 does not affect the collection portion 9, so there is no risk of foreign matter (non-magnetic material) that fell off the filter 20 when water flow was stopped and collected in the collection portion 9 flying up when water flow was resumed. This allows foreign matter in the fluid to be efficiently removed.

[0091] When water is passing through, the fluid in the discharge gap 50 is drawn downward due to an ejector effect caused by the flow of fluid that flows in through the inlet 5 and is deflected downward by the inclined portion 48. This prevents a short circuit, in which the fluid that flows in through the inlet 5 flows upward through the discharge gap 50 and directly flows out of the outlet 6.

[0092] When magnet 28 is removed together with magnet holder 29 from main body 2 after water flow has stopped, magnetic materials such as iron powder that had been attracted to magnet 28 fall off and pass through narrow tube 43 to be temporarily collected by collection unit 9. When plug 13 provided on drain outlet 12 is removed and cock valve 10 provided on collection unit 9 is opened while water flow is stopped, foreign matter (magnetic and non-magnetic materials) collected in collection unit 9 is discharged through drain outlet 12 together with the fluid in main body 2. As in the first embodiment, by forming inclined surface 15 on the bottom surface of collection unit 9 that slopes downward toward cock valve 10 (see FIG. 1), foreign matter can be smoothly discharged together with the fluid from drain outlet 12.

[0093] Foreign matter such as iron powder and rust adhering to the inner walls of the iron pipes that make up the heating circuit peels off from the inner walls and scatters inside the iron pipes when the water in the pipes is drained during heating appliance replacement. If water is passed through the pipes again in this state, the scattered foreign matter will flow with the water, and non-magnetic particles among the foreign matter will be captured by the filter 20, which will gradually become clogged, significantly reducing the amount of water passing through.

[0094] In this case, it is also possible to perform intermittent water flow control, in which the water flow is temporarily stopped when a predetermined time (e.g., 5 minutes) has elapsed since the start of water flow, and then the water is allowed to flow again when another predetermined time (e.g., 5 minutes) has elapsed since the stoppage. This intermittent water flow control stops the water flow when a certain amount of foreign matter has been captured by filter 20 after the predetermined time has elapsed since the start of water flow, and causes the foreign matter captured by filter 20 to fall into collection section 9. As the foreign matter falls off, clogging of filter 20 is eliminated, and the amount of water passing through filter 20 can be restored when water is allowed to flow again.

[0095] This water flow intermittent control can be performed at any appropriate timing, such as when the water in the pipe is drained as described above. Various control rules can be established regarding this timing, such as performing it every time the heating appliance is started, within a predetermined time (e.g., within 10 hours) after the first operation when a new heating appliance is installed, or before restarting operation after a predetermined number of starts (e.g., the 10th time). The water flow interruption and restart can also be repeated multiple times until the foreign matter in the iron pipe is removed to a certain extent. The predetermined time between the water flow interruption and restart can be changed as needed, taking into account the amount of foreign matter contained in the water and the ease with which the foreign matter falls off the filter 20.

[0096] Furthermore, if the filter 20 becomes clogged while water is passing through, the resistance to water flow increases, affecting the pump's current and voltage values, etc. Therefore, it is possible to detect fluctuations in water pressure and pump current and voltage values ​​using various sensors, and control the system so that water flow is stopped and restarted when it is determined that the filter 20 is clogged.

[0097] In the second embodiment, the narrow tube portion 43 is formed at the axial center of the main body 2, and the inner bottom surface of the reduced diameter portion 42 is configured to have a mortar shape that is uniformly inclined circumferentially relative to the narrow tube portion 43. However, as shown in Fig. 19, a first modified example of the second embodiment can also be configured such that a stepped portion 54 is formed such that the inner bottom surface of the reduced diameter portion 42 on the side where the filter 20 is provided is higher than the inner bottom surface of the reduced diameter portion 42 on the opposite side. In this configuration, when water flow is stopped, foreign matter that falls off the filter 20 and accumulates on the inner bottom surface of the reduced diameter portion 42 (area A shown by the dashed line in Fig. 19) without reaching the collection portion 9 is guided downward by the stepped portion 54 and passes through the narrow tube portion 43 to be smoothly collected in the collection portion 9 when water flow is resumed. This prevents the accumulated foreign matter from being stirred up by the fluid when water flow is resumed.

[0098] 20, a second modified example of the second embodiment may be configured such that the thin tube portion 43 is offset toward the wall surface from the center of the main body portion 2. Specifically, the thin tube portion 43 may be offset toward the filter 20 from the center of the main body portion 2. In this way, non-magnetic foreign matter that falls through the discharge gap 50 when water flow is stopped can be smoothly guided to the collection portion 9 through the thin tube portion 43.

[0099] Furthermore, as shown in Fig. 21 in a third modified example of the second embodiment, a plurality of thin tube portions 43 may be provided, each offset from the center of the main body portion 2 toward the filter 20 side and the magnet 28 side. In this way, both non-magnetic foreign matter that falls off the filter 20 when water flow is stopped and magnetic foreign matter that falls off the inner wall of the main body portion 2 when the magnet 28 is removed can be smoothly guided through the thin tube portions 43 to the collection portion 9. The number of thin tube portions 43 is not limited to two, and can be increased as needed, for example, by providing two on the magnet 28 side and two on the filter 20 side.

[0100] Furthermore, the arrangement of the collection unit 9, cock valve 10, and drain outlet 12 is not limited to the arrangement shown in Figure 14, and the collection unit 9, cock valve 10, and drain outlet 12 can be arranged vertically to make it easier to discharge foreign matter, or the opening direction of the cock valve 10 can be rotated 90 degrees relative to the configuration shown in Figure 14 and the drain direction of the drain outlet 12 can be set horizontally, so that when foreign matter becomes clogged in the collection unit 9, it can be removed from the drain outlet 12 side using a jig.

[0101] A third embodiment of the foreign matter removal device 1 according to the present invention is shown in Figures 22 to 24. This foreign matter removal device 1 is based on the foreign matter removal device 1 according to the second embodiment, but employs the configuration of the filter 20 according to the first embodiment. As with the above-described embodiments, the foreign matter removal device 1 according to the third embodiment has a main body 2, a deflection member 3 (short-circuit tube 46, deflection plate 47), and a foreign matter removal unit 4 (magnet 28) as its main components. The configurations of the main body 2, deflection member 3, and foreign matter removal unit 4 are the same as those of the first or second embodiment, and therefore will not be described again.

[0102] The foreign matter removal device 1 according to the third embodiment includes a partition member 16 similar to that of the first embodiment that separates the main body 2 and the collection unit 9. However, the third embodiment differs in that a circular through-hole 24 formed in the cone 17 serves both the functions of the rectangular through-hole 23 and the circular through-hole 24 in the first embodiment. While only a circular through-hole 24 is formed in the cone 17 as shown in FIG. 24 , other through-holes may be formed in the cone 17 as long as the flow in the main body 2 does not affect the collection unit 9. The foreign matter removal device 1 according to the third embodiment is similar to the first embodiment in that the filter 20 is positioned to branch the fluid into a flow path that passes through the filter 20 and a flow path that flows downward along the surface of the filter 20. However, the third embodiment differs in that the filter 20 straddles the circular through-hole 24 formed in the cone 17, slightly offset toward the inlet 5 from the center of the circular through-hole 24.

[0103] The filter 20 is positioned at a predetermined installation position by having both ends sandwiched between ribs 21 formed on the inner wall of the main body 2 and by having its lower end inserted into a pair of slits (not shown) formed on the inner edge of a circular through-hole 24 formed in the cone portion 17 of the partition member 16.

[0104] The following describes the operation of the foreign matter removal device 1 according to the third embodiment when removing foreign matter (magnetic material such as iron powder and non-magnetic material such as rust) contained in hot water as a fluid.

[0105] Fluid containing foreign matter flows into the main body 2 through the short-circuit pipe 46 of the deflector 3 provided at the inlet 5. The straight short-circuit pipe 46 allows the fluid to flow in a straight line, causing it to flow toward the wall surface facing the inlet 5 (to the right in FIG. 22 ). The fluid is then deflected downward by the inclined portion 48 formed on the deflector 3, turns at the lower end of the main body 2, and flows toward the inlet 5. Non-magnetic substances, such as rust, contained in the fluid are collected near the surface of the filter 20 by the flow components passing through the filter 20, and then fall with the flow components moving downward along the surface of the filter 20. The non-magnetic substances then pass through the circular through-hole 24 (to the right of the through-hole 24 in FIG. 24 ) formed in the cone portion 17 of the partition member 16 and are captured by the collector 9. Furthermore, among the foreign matter in the fluid that turns at the lower end of the main body 2, passes through the filter 20, and flows toward the inlet 5, magnetic substances, such as iron powder, are attracted by the magnetic force of the magnet 28 provided on the outer wall of the main body 2.

[0106] The size of the circular through-hole 24 formed in the cone portion 17 is set to an appropriate size so as to minimize the inflow of fluid into the collection portion 9 when water is passed through. For example, when the diameter of the main body portion 2 is 60 mm, the diameter of the circular through-hole 24 is in the range of 5 to 30 mm, preferably 8 to 20 mm. By separating the main body portion 2 and the collection portion 9 with the partition member 16 in this way, the flow of the main body portion 2 does not affect the collection portion 9, so there is no risk of foreign matter (non-magnetic material) collected by the collection portion 9 being blown up during water passage. This allows foreign matter in the fluid to be efficiently removed.

[0107] When the magnet 28 is removed together with the magnet holder 29 from the main body 2 after the water flow has stopped, magnetic materials such as iron powder that had been attracted to the magnet 28 fall off and pass through the circular through-hole 24 (to the left of the through-hole 24 in Figure 24) formed in the cone portion 17 of the partition member 16 to be collected by the collection unit 9. When the plug 13 provided on the drain outlet 12 is removed and the cock valve 10 provided on the collection unit 9 is opened while the water flow is stopped, the foreign matter (magnetic and non-magnetic materials) collected in the collection unit 9 is discharged through the drain outlet 12 together with the fluid in the main body 2. As in the first embodiment, by forming an inclined surface 15 on the bottom surface of the collection unit 9 that slopes downward toward the cock valve 10 (see Figure 1), the foreign matter can be smoothly discharged together with the fluid from the drain outlet 12.

[0108] In the third embodiment, a partition member 16 is provided between the main body 2 and the collection section 9, but it is also possible to configure the main body 2 and the collection section 9 to be connected by a thin tube section 43, as in the second embodiment.

[0109] In the above embodiments, a neodymium magnet is used as the magnet 28, but an electromagnet can also be used. In this case, by cutting off the power supply to the electromagnet, the magnetic material attracted to the electromagnet can be easily released and collected by the collection unit 9, allowing for smooth maintenance work.

[0110] In each of the above embodiments, the magnet 28 is used to capture magnetic materials and the filter 20 is used to capture non-magnetic materials, but if it is only necessary to capture magnetic materials, the filter 20 can be omitted, and if it is only necessary to capture non-magnetic materials or if the magnetic materials are of a size that can be sufficiently captured by the filter 20, the magnet 28 can be omitted.

[0111] The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. Therefore, the scope of the present invention is defined by the claims, not by the above description, and is intended to include meanings equivalent to the claims and all modifications thereof. [Explanation of symbols]

[0112] 1 Foreign matter removal device 2 Main body 3 Deflection member 4 Foreign object removal section 5 Inlet 6 Outlet 7 Inlet pipe connection 8 Outlet piping connection 9. Collection section 10 Cock valve 11, 14, 31 Pin fasteners 12 Drain 13 Stopper 15 Slope 16 Partition member 17 Cone section 18 Cylinder 19, 21, 30, 53 Ribs 20 filters 22 Slit 23 (rectangular) through hole 24 (circular) through holes 25 protrusion 26 V-shaped board 27 Cutout 28 Magnet 29 Magnet holder 32 Flat area 33 Slope 34 Resistance members 35 intake port 36 Abutment wall 37 Drop-in 38 Auxiliary Filter 39 Extension cylinder part 40 Cylindrical filter 41 Through hole 42 Reduced diameter part 43 Thin tube section 44 Lid 45 When connecting parts and materials 46 Short ducts 47. Offset plate 48 Inclined section 49 Next door 50 Discharge gap 51. Still circulating roads 52 Reinforcement Rib 54 step difference department

Claims

[Claim 1] a main body (2) having a fluid inlet (5) and outlet (6) formed therein; a filter (20) provided inside the main body (2); a collecting section (9) for collecting foreign matter that falls off from the surface of the filter (20); and the fluid flowing in from the inlet (5) is branched into a flow path that passes through the filter (20) and reaches the outlet (6), and a flow path that flows on the inlet (5) side of the filter (20) and reaches the outlet (6) without passing through the filter (20), A through hole (23) is formed in the middle of the flow path leading to the outlet (6) without passing through the filter (20) to narrow the width of the flow path, and foreign matter collected near the surface of the filter (20) is collected in the collection section (9) by a flow component passing through the flow path leading to the outlet (6) through the through hole (23) without passing through the filter (20), The main body (2) and the collection section (9) are separated by a partition member (16), and the through-hole (23) is formed in the partition member (16) on the inlet (5) side of the filter (20), a through-hole (24) communicating the main body portion (2) and the collection portion (9) is formed on the outlet (6) side of the filter (20) of the partition member (16); The filter (20) is arranged along the inner edge of the through hole (23) formed on the inlet (5) side, A foreign matter removal device in which the entrance of the through hole (23) formed on the inlet (5) side is located above the exit of the through hole (24) formed on the outlet (6) side.

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