EMF filter device with improved heat exchange efficiency

Abstract

The present invention relates to an EMF filter device with improved heat exchange efficiency, the EMF filter device including: a filter body having a cylindrical shape and including a central pipe; a plurality of coil units stacked to surround the central pipe of the filter body, in which each of the coil units includes circular coil plates surrounding the central pipe and an insulating material provided between the circular coil plates; a plurality of flow path compartment partitions extending from an inner wall part of the filter body, making contact with outer wall parts of the coil units, and arranged at a predetermined angular interval on the inner wall part of the filter body; a plurality of cooling flow path spacers arranged between the coil units; and an insulating oil cooler connected to the filter body, and configured to allow cooling oil to circulate inside the filter body for cooling.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention

[0001] The present invention relates to an EMF filter device with improved heat exchange efficiency, and more particularly, to an EMF filter device with improved heat exchange efficiency, capable of removing a magnetic substance included in a material by using an electromagnetic field.2. Description of the Related Art

[0002] In general, an electromagnetic filter (EMF) is a device that passes a powder or sol-gel material through a strong magnetic field and filters out a ferromagnetic material having excellent magnetic permeability by using an electromagnet filter to remove a magnetic substance.

[0003] The electromagnetic filter is used to completely remove a very small amount of a weakly-magnetic / ferromagnetic substance (iron, STS430) from a raw material by concentrating and maximizing a magnetic force. The magnetic force of the electromagnetic filter may be controlled by electricity, and an automatic electromagnetic filtering scheme may also be applied based on a configuration of a system upon electromagnetic filtering.

[0004] The electromagnetic filter is a device that filters out and removes a magnetic substance such as iron included in minerals, polymers, or foods in the form of powder or slurry by using an electromagnetic force. The importance of the electromagnetic filter has increased as iron included in secondary battery materials has been identified as a cause of a fire of a secondary battery.

[0005] The electromagnetic filter includes a cooling unit to cool an inside of a coil unit that is magnetized to generate heat when the power is applied, in which the cooling unit operates an oil circulation pump to supply cooling oil into the coil unit through an oil supply pipe when a temperature of the coil unit is increased, an oil recovery pipe recovers the cooling oil used for cooling from the inside of the coil unit, and the cooling oil is cooled through an oil cooler so as to be introduced into a case of the coil unit again.

[0006] According to such an existing EMF system, a resistance is increased due to heat generation of a coil as a processing capacity increases, which reduces a current that generates a magnetic force to weaken an intensity of a magnetic field, and the heat is not properly dissipated due to inefficiency of a heat exchanger.[Documents of Related Art][Patent Documents]

[0007] (Patent document 1) KR 10-2644710 B1SUMMARY OF THE INVENTION

[0008] To solve the problems described above, an object of the present invention is to provide an EMF filter device with improved heat exchange efficiency, in which an internal structure and a heat exchanger of an EMF system are modified, so that a strong magnetic field may be generated by allowing more current to flow.

[0009] The present invention provides an EMF filter device with improved heat exchange efficiency, the EMF filter device including: a filter body having a cylindrical shape and including a central pipe; a plurality of coil units stacked to surround the central pipe of the filter body, in which each of the coil units includes circular coil plates surrounding the central pipe and an insulating material provided between the circular coil plates; a plurality of flow path compartment partitions extending from an inner wall part of the filter body, making contact with outer wall parts of the coil units, and arranged at a predetermined angular interval on the inner wall part of the filter body; a plurality of cooling flow path spacers arranged between the coil units; and an insulating oil cooler connected to the filter body, and configured to allow cooling oil to circulate inside the filter body for cooling, wherein the cooling flow path spacers include: a plurality of first direction spacers arranged to face between the flow path compartment partitions at a predetermined interval on both sides of the coil unit based on the central pipe between the coil units; and a plurality of second direction spacers arranged between the first direction spacers on another both sides of the coil unit based on the central pipe between the coil units.

[0010] The first direction spacers may include: a pair of first horizontal spacers arranged on both sides of the central pipe on a line that is orthogonal to a center line of the central pipe; and a plurality of pairs of second horizontal spacers arranged symmetrically with each other based on the first horizontal spacers while being spaced apart from the pair of first horizontal spacers.

[0011] One end portion of each of the first direction spacers and the second direction spacers may include at least one inclined surface configured to guide the cooling oil toward one of the central pipe and the inner wall part of the filter body.

[0012] The second direction spacers may include: a first vertical spacer arranged adjacent to the central pipe, parallel to the first direction spacer, and configured to guide the cooling oil toward the pair of first horizontal spacers; and a second vertical spacer configured to guide the cooling oil passing between the first direction spacers toward the pair of second horizontal spacers.

[0013] The insulating oil cooler may include: an oil tank configured to store the cooling oil; an oil supply pipe connecting the oil tank and the filter body, and coupled to an outer wall part of the filter body so as to face a center of the central pipe; an oil recovery pipe connecting the filter body and the oil tank on an opposite side of the oil supply pipe; and an oil pump disposed on at least one of the oil supply pipe and the oil recovery pipe, wherein the oil supply pipe is connected to one side wall part of the oil tank to supply the cooling oil between one portions of the first direction spacers, and the oil recovery pipe is connected to an opposite side wall part of the oil tank to recover the cooling oil between opposite portions of the first direction spacers.

[0014] The flow path compartment partition may include: a baffle coupled to the inner wall part of the filter body; and a plate-shaped bakelite connected to the baffle, and making contact with the coil unit.

[0015] According to the present invention, the EMF filter device may further include: a plurality of fixing brackets coupled to the inner wall part of the filter body; and an installation bar connecting the fixing brackets, and the first direction spacers may be coupled to the installation bar and arranged between the coil units.

[0016] According to the above configuration, the present invention provides an EMF filter device with improved heat exchange efficiency, in which an internal structure and a heat exchanger of an EMF system are modified such that cooling performance is modified to increase the heat exchange efficiency, so that a strong magnetic field can be generated by allowing more current to flow.BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a front view showing an EMF filter device with improved heat exchange efficiency according to one embodiment of the present invention. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a sectional view taken along a line A-A of FIG. 2. FIG. 4 is a detailed view showing a coil unit of FIG. 3. FIG. 5 is a layout view showing a cooling flow path spacer according to a perspective view showing an inside of a filter body of FIG. 2. FIG. 6 is a view showing a flow state of cooling oil in the cooling flow path spacer of FIG. 5. FIG. 7 is a layout view showing another cooling flow path spacer according to the perspective view showing the inside of the filter body of FIG. 2. FIG. 8 is a perspective view showing another cooling flow path spacer and a plurality of coil units of FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, various embodiments of the present invention will be described with reference to specific embodiments shown in the accompanying drawings. The present invention relates to a device in which a cooling structure and a coil of an EMF system are improved, wherein an existing S&T-type heat exchanger is replaced with a plate-shaped heat exchanger, so that heat exchange efficiency may be increased in the same space, and cooling performance may be improved by allowing insulating oil to directly flow inside a coil, and thus a stronger magnetic field may be generated by allowing more current to flow.

[0019] FIG. 1 is a front view showing an EMF filter device with improved heat exchange efficiency according to one embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along a line A-A of FIG. 2, and FIG. 4 is a detailed view showing a coil unit of FIG. 3.

[0020] Referring to FIGS. 1 to 4, according to an embodiment of the present invention, an EMF filter device 100 with improved heat exchange efficiency may include: a filter body 110 having a cylindrical shape and including a central pipe 115; a plurality of coil units 120 stacked to surround the central pipe 115 of the filter body 110, in which each of the coil units 120 includes circular coil plates 121 surrounding the central pipe 115 and an insulating material 125 provided between the circular coil plates 121; a plurality of flow path compartment partitions 130 extending from an inner wall part of the filter body 110, making contact with outer wall parts of the coil units 120, and arranged at a predetermined angular interval on the inner wall part of the filter body 110; a plurality of cooling flow path spacers 140 arranged between the coil units 120; and an insulating oil cooler 150 connected to the filter body 110, and configured to allow cooling oil to circulate inside the filter body 110 for cooling.

[0021] The filter body 110 may have a cylindrical shape, and a central pipe 115 through which a material to be filtered by a magnetic force passes may be disposed at a central portion of the filter body 110. The central pipe 115 may connect top and bottom surface parts of the filter body 110, and may be connected to an external pipe for supplying a filtering material.

[0022] A plurality of coil units 120 may be stacked to surround the central pipe 115 so as to provide a magnetic force to the central pipe 115 from an inside of the filter body 110, in which electric power may be supplied from a transmitter connected to a power source to generate an electromagnetic force.

[0023] The coil units 120 may generate resistance heat caused by their own resistances upon the generation of the electromagnetic force, so that the cooling oil for dissipating the resistance heat to an outside may be supplied to the filter body 110 to circulate for cooling.

[0024] In addition, regarding the coil units 120, the cooling flow path spacers 140 may be arranged between the coil units 120 so that the cooling oil may be supplied between the coil units 120 to ensure sufficient heat exchange.

[0025] A plurality of flow path compartment partitions 130 may be coupled to the filter body 110 on both front sides of the central pipe 115, and may be coupled to the filter body 110 on both rear sides of the central pipe 115. In this case, the flow path compartment partitions 130 may be arranged between virtual orthogonal lines that are orthogonal to each other in horizontal and vertical directions at a center of the central pipe 115, and may be arranged at a 90-degree interval in the filter body 110.

[0026] The flow path compartment partitions 130 may be divided into a pair of first flow path compartment partitions 131 arranged on both front sides of the central pipe 115 and a pair of second flow path compartment partitions 132 arranged on both rear sides of the central pipe 115.

[0027] The flow path compartment partitions 130 may include: a baffle 134 coupled to the inner wall part of the filter body 110; and a plate-shaped bakelite 135 connected to the baffle 134, and making contact with the coil unit 120.

[0028] In addition, according to the present embodiment, third flow path compartment partitions 133 inclined on both sides while being adjacent to a central horizontal line of the filter body 110 and configured to guide the cooling oil to an inner rear region of the filter body 110 may be additionally provided.

[0029] FIG. 5 is a layout view showing a cooling flow path spacer according to a perspective view showing an inside of a filter body of FIG. 2, FIG. 6 is a view showing a flow state of cooling oil in the cooling flow path spacer of FIG. 5, FIG. 7 is a layout view showing another cooling flow path spacer according to the perspective view showing the inside of the filter body of FIG. 2, and FIG. 8 is a perspective view showing another cooling flow path spacer and a plurality of coil units of FIG. 7.

[0030] Referring further to FIGS. 5 and 6, the cooling flow path spacers 140 may include: a plurality of first direction spacers 141 arranged to face between the flow path compartment partitions 130 at a predetermined interval on both sides of the coil unit 120 based on the central pipe 115 between the coil units 120; and a plurality of second direction spacers 145 arranged between the first direction spacers 141 on another both sides of the coil unit 120 based on the central pipe 115 between the coil units 120.

[0031] The first direction spacers 141 may be arranged to allow the cooling oil, which is introduced from a front surface portion of the filter body 110 toward the central pipe 115, to flow to both sides of the filter body 110 or to an inner side from the both sides. Accordingly, the cooling oil may flow to both sides due to the first direction spacer 141 in front and rear portions of the filter body 110, and flow inward again, thereby uniformly flowing from the front portion to the rear portion.

[0032] The first direction spacers 141 may include: a pair of first horizontal spacers 141-1 arranged on both sides of the central pipe 115 on a line that is orthogonal to a center line of the central pipe 115; and a plurality of pairs of second horizontal spacers 141-2 arranged symmetrically with each other based on the first horizontal spacers 141-1 while being spaced apart from the pair of first horizontal spacers 141-1.

[0033] The first horizontal spacers 141-1 may be arranged and elongated on both sides of the central pipe 115, and the second horizontal spacers 141-2 may be arranged by a shorter length than the first horizontal spacers 141-1 in front and rear regions of the first horizontal spacers 141-1 and arranged in a straight line from an inner region of the coil unit 120 to an outer circumferential surface of the coil unit 120. In this case, both the first horizontal spacers 141-1 and the second horizontal spacers 141-2 may be symmetrically arranged on both side regions based on the central pipe 115.

[0034] According to the present embodiment, as an installation structure capable of fixing the first horizontal spacer 141-1 and the second horizontal spacer 141-2 to the filter body 110, the EMF filter device may further include: a plurality of fixing brackets 143 coupled to the inner wall part of the filter body 110; and an installation bar 144 connecting the fixing brackets 143. The first direction spacers 141 may be coupled to the installation bar 144 and arranged between the coil units 120. The fixing bracket 143 and the installation bar 144 may be used as a structure for fixing the second vertical spacer 145-2 of the second direction spacer 145 to the filter body 110.

[0035] Referring further to FIGS. 7 and 8, one end portion of each of the first direction spacers 141 and the second direction spacers 145 may include at least one inclined surface 147 configured to guide the cooling oil toward one of the central pipe 115 and the inner wall part of the filter body 110.

[0036] First, among the first direction spacers 141, a pair of first horizontal spacers 141-1 arranged on both sides of the central pipe 115 may be inclined to widen a flow path width with respect to a flow direction of the cooling oil, a pair of second horizontal spacers 141-2 arranged on a front side of the central pipe 115 may have an inclined surface 147 to narrow the flow path width with respect to the flow direction of the cooling oil, and another pair of second horizontal spacers 141-2 arranged on a rear side of the central pipe 115 may have an inclined surface 147 to widen the flow path width with respect to the flow direction of the cooling oil.

[0037] The second direction spacers 145 may include: a first vertical spacer 145-1 arranged adjacent to the central pipe 115, arranged parallel to the first direction spacer 141, and configured to guide the cooling oil toward the pair of first horizontal spacers 141-1; and a second vertical spacer 145-2 configured to guide the cooling oil introduced between the first direction spacers 141 toward the pair of second horizontal spacers 141-2.

[0038] The first vertical spacer 145-1 may be arranged in a front region of the central pipe 115 so as to be shorter than a diameter of the central pipe 115, and may guide the cooling oil, which is introduced between the pair of second horizontal spacers 141-2 arranged on the front side of the central pipe 115, toward the pair of first horizontal spacers 141-1 arranged on both sides on the front side of the central pipe 115.

[0039] The second vertical spacer 145-2 may divide and guide the cooling oil, which is introduced between the pair of first horizontal spacers 141-1 and another pair of second horizontal spacers 141-2 in a rear region of the central pipe 115, into both sides of an end of the rear region of the central pipe 115.

[0040] A pair of second horizontal spacers 141-2 of the first direction spacer 141, which is arranged on the front side of the central pipe 115, may be arranged such that the pair of first flow path compartment partitions 131 may encompass an introduction port arranged in a front surface part 111 of the filter body 110, so that the cooling oil introduced through the introduction port may pass.

[0041] In other words, the cooling oil may be restricted from moving to both sides of the filter body 110 due to the pair of first flow path compartment partitions 131, so that the cooling oil may pass between the pair of second horizontal spacers 141-2 arranged on the front side of the central pipe 115, flow to the first vertical spacer 145-1 of the second direction spacer 145 arranged on the front side of the central pipe 115, and flow toward the pair of first horizontal spacers 141-1.

[0042] The cooling oil introduced toward the pair of first horizontal spacers 141-1 may be guided by a third horizontal compartment partition 133 while being restricted from flowing due to the second horizontal compartment partition 132, so that the cooling oil may flow between the pair of first horizontal spacers 141-1 and another pair of second horizontal spacers 141-2 arranged in the rear region of the central pipe 115, pass between another pair of second horizontal spacers 141-2, flow separately to both sides at the second vertical spacers 145-2, and circulate in the rear region of the central pipe 115 so as to be discharged through a discharge port provided in a rear surface part 112 of the filter body 110.

[0043] As described above, the cooling oil may be introduced into the front portion of the filter body 110 so as to circulate in the front region of the central pipe 115, introduced into both rear sides of the central pipe 115 so as to circulate in the rear region of the central pipe 115, and discharged to a rear portion of the filter body 110, so that the cooling oil may evenly pass through a space between the coil units 120 stacked inside the filter body 110 to cool the coil units 120.

[0044] Meanwhile, the insulating oil cooler 150 may include: an oil tank 160 configured to store the cooling oil; an oil supply pipe 161 connecting the oil tank 160 and the filter body 110, and coupled to an outer wall part of the filter body 110 so as to face a center of the central pipe 115; an oil recovery pipe 162 connecting the filter body 110 and the oil tank 160 on an opposite side of the oil supply pipe 161; and an oil pump 165 disposed on at least one of the oil supply pipe 161 and the oil recovery pipe 162.

[0045] The oil supply pipe 161 may be connected to a front surface wall part of the oil tank 160 to supply the cooling oil between the pair of second horizontal spacers 141-2 arranged on the front side of the central pipe 115 among the first direction spacers 141, and the oil recovery pipe 162 may be connected to a rear surface wall part of the oil tank 160 to recover the cooling oil passing between another pair of second horizontal spacers 141-2 arranged on the rear side of the central pipe 115 among the first direction spacers 141.

[0046] An injector (or distributor) 170 coupled to the front surface part of the filter body 110 to supply oil to the introduction port of the filter body 110 may be coupled to the oil supply pipe 161.

[0047] Accordingly, an oil fluid may be directly injected between the stacked coil units 120 through an injector nozzle provided at a rear end of the injector 170 so that a flow rate of the oil flowing to an outside of the coil unit 120 may be minimized, and cool oil introduced into the filter body 110 may make direct contact with the circular coil plates 121 of the coil units 120 so that heat exchange efficiency may be increased by using the oil that initially has a low temperature.

[0048] Meanwhile, the injector 170 may be manufactured so as to be flexible by using silicone, and efficiently and directly located in a space between the coil units 120, so that the heat exchange efficiency may be further increased.

[0049] With respect to embodiments according to the concept of the present invention disclosed herein, specific structural or functional descriptions have been illustrated to describe the embodiments according to the concept of the present invention only, so that the embodiments according to the concept of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described herein.[Description of Reference Numerals]

[0050] 100: Filter device 110: Filter body 111: Front surface part 112: Rear surface part 115: Central pipe 120: Coil unit 121: Circular coil plate 125: Insulating material 130: Plurality of flow path compartment partitions 131: First flow path compartment partition 132: Second flow path compartment partition 134: Baffle 135: Plate-shaped bakelite 140: Plurality of cooling flow path spacers 141: First direction spacer 141-1: First horizontal spacer 141-2: Second horizontal spacer 143: Fixing bracket 144: Installation bar 145: Second direction spacer 145-1: First vertical spacer 145-2: Second vertical spacer 147: Inclined surface 150: Insulating oil cooler 160: Oil tank 161: Oil supply pipe 162: Oil recovery pipe 165: Oil pump

Claims

1. An EMF filter device with improved heat exchange efficiency, the EMF filter device comprising: a filter body having a cylindrical shape and including a central pipe; a plurality of coil units stacked to surround the central pipe of the filter body, in which each of the coil units includes circular coil plates surrounding the central pipe and an insulating material provided between the circular coil plates; a plurality of flow path compartment partitions extending from an inner wall part of the filter body, making contact with outer wall parts of the coil units, and arranged at a predetermined angular interval on the inner wall part of the filter body; a plurality of cooling flow path spacers arranged between the coil units; and an insulating oil cooler connected to the filter body, and configured to allow cooling oil to circulate inside the filter body for cooling, wherein the cooling flow path spacers include: a plurality of first direction spacers arranged to face between the flow path compartment partitions at a predetermined interval on both sides of the coil unit based on the central pipe between the coil units; and a plurality of second direction spacers arranged between the first direction spacers on another both sides of the coil unit based on the central pipe between the coil units, and the flow path compartment partition includes: a baffle coupled to the inner wall part of the filter body; and a plate-shaped bakelite connected to the baffle, and making contact with the coil unit.

2. The EMF filter device of claim 1, further comprising: a plurality of fixing brackets coupled to the inner wall part of the filter body; and an installation bar connecting the fixing brackets, wherein the first direction spacers are coupled to the installation bar and arranged between the coil units.

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