Foreign body removal device

Abstract

The present invention relates to a foreign matter removing device, and more particularly, to a foreign matter removing device in which a length of a body portion is increased to correspond to a size of a large-sized battery for a vehicle, and a plurality of suction passages each having a hook shape are provided, thereby effectively removing foreign matters generated in a process of manufacturing a battery for a vehicle.

Description

TECHNICAL FIELD

[0001] This application claims priority to and the benefit of Korean Patent Application Nos. 10-2020-0140273 and 10-2020-0140268, filed on October 27, 2020, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to a foreign matter removing device, and more particularly, to a foreign matter removing device in which a length of a main body part is increased to correspond to a size of a large battery for a vehicle, and a passage for separating and removing foreign matter is divided, thereby effectively removing foreign matter generated during a process of manufacturing a battery for a vehicle. BACKGROUND

[0003] In recent years, secondary batteries have been widely used not only for small devices such as portable electronic devices, but also for electric vehicles that secure driving power by using an internal combustion engine and / or an electric motor. The electric vehicles include hybrid vehicles, plug-in hybrid vehicles, and pure electric vehicles that are driven only by an electric motor and a battery without an internal combustion engine.

[0004] In the case of the electric vehicles, a large number of secondary batteries are electrically connected to increase capacity and output. In particular, pouch-type secondary batteries are generally used for medium or large devices because the pouch-type secondary batteries are easy to stack.

[0005] The types of secondary batteries that are widely used at present include lithium ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, etc. The operating voltage of a single secondary battery cell (i.e., a single battery cell) is approximately 2.5 V to 4.2 V. Therefore, when an output voltage higher than the operating voltage is required, a plurality of battery cells are connected in series and constitute a battery pack. Also, according to the charge / discharge capacity required for the battery pack, a plurality of battery cells are connected in parallel and constitute a battery pack. The number of battery cells included in the battery pack can be differently set according to the required output voltage or the required charge / discharge capacity.

[0006] Meanwhile, the large secondary battery for a vehicle has a problem in that, since the large secondary battery has a larger area than an ordinary secondary battery, the risk of a ground fault caused by foreign matter is high. In particular, there are many factors related to the generation and exposure of foreign matter, such as the generation of foreign matter during a process of cutting an electrode by using a cutting unit, exposure to foreign matter in a moving section according to a process flow under a feeding belt / cutter, or the falling of foreign matter in an upward / downward direction according to the arrangement of equipment.

[0007] Figure 1is a perspective view illustrating a structure of a foreign matter removing device in the related art. The foreign matter removing device in the related art includes a main body portion configured to accommodate a dropped foreign matter, a suction device configured to suction the foreign matter captured in the main body portion, an air blowing portion configured to guide the foreign matter captured in the main body portion in a direction of the suction device, and a cover having a structure installed on the main body portion and configured to prevent the foreign matter from being scattered to the outside by air flow generated by the air blowing portion.

[0008] In the related art, there is no standard related to a foreign matter removing device for a process of manufacturing a secondary battery for a vehicle, and there is no foreign matter removing device that can process a long battery of up to 580 mm for a vehicle. For this reason, there is a problem that a ground fault occurs due to a foreign matter generated from the battery during a process of manufacturing a long battery of up to 580 mm for a vehicle.

[0009] Therefore, there is a need for a solution to improve the structure of a foreign matter removing device that can maximize the efficiency of removing foreign matters so that there is no problem of a ground fault caused by foreign matters during a process of manufacturing a long battery of up to 580 mm for a vehicle. SUMMARY

[0010] TECHNICAL PROBLEM

[0011] The present invention is directed to solving the above problems, and an object of the present invention is to provide a foreign matter removing device in which the efficiency of removing foreign matters is maximized by designing a new structure of a foreign matter removing device including a plurality of channels each having a swoosh shape.

[0012] Another object of the present invention is to provide a foreign matter removing device that improves the efficiency of removing foreign matters, solves a ground fault problem of a large secondary battery for a vehicle, and improves a battery yield.

[0013] TECHNICAL SOLUTION

[0014] The foreign matter removing device according to the present invention can include a main body portion, a plurality of channels formed at one side of the main body portion and configured to suction foreign matters, and a discharge portion configured to provide a suction force to the channels and discharge the foreign matters to the outside.

[0015] In one embodiment, the foreign matter removing device can further include a main jet portion positioned at one side of the main body portion, a plurality of jet channels included in the main jet portion and configured to separate the foreign matters and correspond to the channels, and a jet port portion positioned at one side of the discharge portion and configured to supply air to the jet channels.

[0016] Advantageous Effects

[0017] According to the present application, by designing a new structure of a foreign matter removing device including a plurality of channels each having a hook shape, it is possible to maximize the efficiency of removing foreign matters.

[0018] Further, it is possible to improve the efficiency of removing foreign matters, solve the problem of ground fault of a large secondary battery for a vehicle, and improve the battery yield. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view illustrating a structure of a foreign matter removing device in the related art.

[0020] Figure 2 is a perspective view illustrating a structure of a foreign matter removing device according to an embodiment of the present application.

[0021] FIG. 3(a) is a cross-sectional view illustrating a lateral structure of a foreign matter removing device according to the present application, and FIG. 3(b) is a cross-sectional view illustrating a front structure of a foreign matter removing device according to the present application.

[0022] Figure 4 is a perspective view illustrating a structure of a foreign matter removing device according to another embodiment of the present application.

[0023] FIG. 5(a) is a cross-sectional view illustrating a front structure of a foreign matter removing device according to the present application, and FIG. 5(b) is a cross-sectional view illustrating a rear structure of a foreign matter removing device according to the present application.

[0024] FIG. 6(a) is a cross-sectional view illustrating a lateral (right side) structure of a foreign matter removing device according to the present application, and FIG. 6(b) is a cross-sectional view illustrating a lateral (left side) structure of a foreign matter removing device according to the present application.

[0025] Figure 7 is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device according to the present application.

[0026] Figure 8 is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device according to Example 1 of the present application.

[0027] Figure 9 is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device according to Example 2 of the present application.

[0028] [Explanation of Reference Numerals and Symbols]

[0029] 1000: foreign matter removing device

[0030] 100: suction portion

[0031] 110: main body portion

[0032] 111: suction wall

[0033] 120: passage

[0034] 121: air suction portion

[0035] 122: first guide portion

[0036] 130: discharge portion

[0037] 200: injection portion

[0038] 210: main injection body portion

[0039] 211: injection wall

[0040] 220: injection passage

[0041] 230: injection port portion DETAILED DESCRIPTION

[0042] The detailed description of the present application is provided to give a complete understanding of the application to those skilled in the art. Throughout the specification, unless explicitly described to the contrary, when a component "comprises" another component or "characterized by" having a certain structure and a certain shape, it means that other components, structures, and shapes can be included without being excluded.

[0043] The present application can be variously modified and can have various embodiments, and the detailed description will be described in detail in the detailed description. However, the description of the embodiments is not intended to limit the scope of the present application, but it should be understood that the present application will cover all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present application.

[0044] Figure 2 is a perspective view illustrating a structure of a foreign matter removing device 1000 according to an embodiment of the present application. Referring to Figure 2 , the foreign matter removing device 1000 can include a suction portion 100. The suction portion 100 can include a main body portion 110, a passage 120, and a discharge portion 130. Each component will be described below.

[0045] The main body portion 110 serves to provide a space in which an air flow is generated by a negative pressure, so that foreign substances introduced through the passage 120 described below are easily discharged to the discharge portion 130. To perform the above-described function, the main body portion 110 can have a hollow portion, so that an air flow can be generated by an internal negative pressure, so that foreign substances introduced through the passage 120 are easily discharged to the discharge portion 130.

[0046] Further, the main body portion 110 can have a polyhedral columnar structure extending a predetermined length. For example, the main body portion 110 can have a columnar structure having various cross-sectional shapes such as a circular, quadrangular, pentagonal, or hexagonal cross-sectional shape.

[0047] The main body portion 110 can have a length of 180 mm to 580 mm depending on the shape of the secondary battery of the vehicle in which the foreign substance removal device 1000 is used. In this case, in the case in which the length of the main body portion 110 is less than 180 mm, a problem in which the main body portion 110 cannot accommodate a large amount of foreign substances generated during a process of manufacturing a secondary battery for a vehicle can occur. Further, in the case in which the length of the main body portion 110 is greater than 580 mm, the volume of the main body portion 110 is increased, which can cause a problem in which the versatility of the foreign substance removal device 1000 is reduced during a process of manufacturing a secondary battery for a vehicle.

[0048] The passage 120 serves as a passage through which foreign substances generated during a process of manufacturing a secondary battery for a vehicle are sucked into the foreign substance removal device 1000. To perform the above-described function, one or more passages 120 can be formed at one side portion of the main body portion 110, and the passage 120 has an open shape.

[0049] One side portion of the passage 120 can have a straight shape, and the other side portion of the passage 120 can have a curved shape, based on a direction perpendicular to the main body portion 110. In other words, the passage 120 can be provided in a form in which a straight passage formed in a height direction and a length direction of the main body portion 110 is connected by a curved passage. For example, the passage 120 can be formed in a hook shape (a logo shape of Nike) in which one side portion thereof defines a curve.

[0050] According to the shape of the secondary battery of the vehicle using the foreign matter removing device 1000, four to twelve channels 120 can be provided. In this case, in the case where the number of channels 120 is less than four, a problem in which the effect of suctioning a large amount of foreign matter generated during a process of manufacturing the secondary battery for the vehicle is insufficient can occur. In addition, in the case where the number of channels 120 is more than twelve, the volume of the body portion 110 for accommodating the plurality of channels 120 increases, which can cause a problem in which the versatility of the foreign matter removing device 1000 during a process of manufacturing the secondary battery for the vehicle is reduced.

[0051] In this embodiment, the channels 120 can be formed in a shape in which the length of the channels 120 decreases as the distance from the discharge portion 130, which will be described below, decreases, so that the speed at which foreign matter is suctioned into the body portion 110 is uniform. In this case, the length of the plurality of channels 120 decreases at a constant ratio in proportion to the distance between the channels 120 and the discharge portion 130. Accordingly, even if the suction force applied to the channels 120 is different, the amount and speed of suction of foreign matter introduced through the channels 120 can be uniform.

[0052] The discharge portion 130 serves to provide a suction force to the channels 120 and discharge foreign matter introduced into the body portion 110 through the channels 120 to the outside. To perform the above-described function, the discharge portion 130 can have a columnar structure with one open end portion, and a suction device or a pump configured to suction foreign matter can be positioned at one end portion of the discharge portion 130. In this case, one end portion of the discharge portion 130 can be a side positioned opposite to an end portion connected to the body portion 110, and refers to one end portion of the two opposite end portions of the discharge portion 130 located in the direction of air suction.

[0053] The discharge portion 130 can provide a suction force to the channels 120 through the suction device and capture foreign matter introduced into the body portion 110. In this case, in order to easily discharge foreign matter, the inner diameter of the discharge portion 130 can vary according to the length of the body portion 110, the number of channels 120, and the performance of the suction device. In addition, the diameter of the discharge portion 130 can increase in the direction in which foreign matter is discharged.

[0054] FIG. 3(a) is a cross-sectional view illustrating a lateral structure of the foreign matter removing device 1000 according to the present application. Referring to FIG. 3(a), the channel 120 can include an air suction portion 121 disposed adjacent to an external foreign matter and a first guide portion 122 configured to connect the channel 120 and the body portion 110.

[0055] The air suction portion 121 is disposed adjacent to the foreign matter located at the outer side and serves as a passage through which the foreign matter is sucked by the suction force generated in the passage 120. To perform the above function, the air suction portion 121 can be formed in a straight shape toward the main body portion 110.

[0056] The first guide portion 122 serves to guide the foreign matter that has passed through the air suction portion 121 so that the foreign matter is easily moved into the main body portion 110. To perform the above function, the first guide portion 122 can be formed in a curved shape having a predetermined curvature. In this case, one end portion of the first guide portion 122 can extend toward the discharge portion 130 to guide the foreign matter so that the foreign matter is easily discharged to the discharge portion 130.

[0057] FIG. 3(b) is a cross-sectional view illustrating a front structure of the foreign matter removing device 1000 according to the present application. Referring to FIG. 3(b), the main body portion 110 can be formed to have an internal width that increases in a direction from one side portion in which the passage 120 is formed to the other side portion, so that a flow rate of internal air flow generated by the negative pressure increases. In other words, the internal width of the main body portion 110 can increase from one side portion in which the passage 120 is formed toward the other side portion. In this case, one side portion and one surface of the main body portion 110 in which the passage 120 is formed can indicate such a surface of the main body portion 110 that contacts or is closest to a surface of an object or a thing from which the foreign matter is to be removed. That is, the main body portion 110 can be configured such that a diameter of the main body portion 110 can increase in a direction opposite to the gravity. In this case, the diameter of the main body portion 110 can indicate a distance between two symmetrical opposite end portions of a surface parallel to a direction perpendicular to the direction of the gravity.

[0058] In this case, the main body portion 110 has a larger internal space than the passage 120, which increases a suction speed of the foreign matter removing device 1000.

[0059] Figure 4 FIG. 5(a) is a cross-sectional view illustrating a front structure of the foreign matter removing device according to the present application, and FIG. 5(b) is a cross-sectional view illustrating a rear structure of the foreign matter removing device according to the present application. Further, FIG. 6(a) is a cross-sectional view illustrating a lateral (right side) structure of the foreign matter removing device 1000 according to the present application, and FIG. 6(b) is a cross-sectional view illustrating a lateral (left side) structure of the foreign matter removing device 1000 according to the present application.

[0060] The foreign matter removing device 1000 according to another embodiment of the present application can include a suction portion 100 and a spray portion 200.

[0061] The suction portion 100 can include a main body portion 110, a passage 120, and a discharge portion 130. Since the main body portion 110, the passage 120, and the discharge portion 130 are identical in configuration to those of the foreign matter removing device 1000 according to the previous embodiment of the present application, a detailed description thereof will be omitted.

[0062] The injection portion 200 can include a main injection body portion 210, an injection passage 220, and an injection port portion 230.

[0063] The main injection body portion 210 can define the overall shape of the injection portion 200 and have a hollow shape so that an air flow can be generated in the main injection body portion 210 by air supplied from the injection port portion 230.

[0064] The main injection body portion 210 can have a polyhedral columnar structure extending a predetermined length. For example, the main injection body portion 210 can have a columnar structure having various cross-sectional shapes such as a circular, quadrangular, pentagonal, or hexagonal cross-sectional shape.

[0065] The main injection body portion 210 can be formed to correspond to the main body portion 110. In this embodiment, the main injection body portion 210 can have a length of 180 mm to 580 mm according to the shape of the secondary battery of the vehicle using the foreign matter removing device 1000. In this case, in the case where the length of the main injection body portion 210 is less than 180 mm, there can be a problem in that the main injection body portion 210 cannot accommodate a large amount of foreign matter generated during a process of manufacturing a secondary battery for a vehicle. In addition, in the case where the length of the main injection body portion 210 is greater than 580 mm, the volume of the main injection body portion 210 is increased, which can cause a problem in that the versatility of the foreign matter removing device 1000 is reduced during a process of manufacturing a secondary battery for a vehicle.

[0066] In addition, the main injection body portion 210 is positioned at one side of the main body portion 110, and the main body portion 110 and the main injection body portion 210 are spaced apart from each other at a predetermined distance so that foreign matter introduced into the main body portion 110 does not interfere with air supplied to the main injection body portion 210.

[0067] The inner width of the main spout portion 210 can increase in a direction from one side to the other side where the spouting passage 220 is formed. In other words, the diameter of the main spout portion 210 can increase from one side to the other side where the spouting passage 220 is formed. In this case, one surface of the main spout portion 210 can refer to a lower surface of the main spout portion 210 where the spouting passage 220 is formed, i.e., one surface of the main spout portion 210 that faces a wall or a ground surface on which a foreign substance is present. Referring to FIG. 5, the surfaces of the main body portion 110 and the main spout portion 210 that face each other can each have a predetermined inclination in a direction toward the lower portion of the main spout portion 210 or the lower portion of the main body portion 110. In other words, the surfaces of the main body portion 110 and the main spout portion 210 that face each other can each have a predetermined height gradient in a direction from the lower portion of the main body portion 110 and the lower portion of the main spout portion 210.

[0068] In this case, as the width of the lower portion of the main spout portion 210 decreases, a space can be formed between the lower portion of the main body portion 110 and the lower portion of the main spout portion 210. In other words, when the foreign substance removing apparatus 1000 is in contact with the surface of the object, the lower portion of the main body portion 110, the lower portion of the main spout portion 210, and the surface of the object can define a triangular space.

[0069] In the case of the suction portion 100 according to another embodiment, one surface of the main body portion 110 of the suction portion 100 that faces the main spout portion 210 can have a predetermined inclination such that the inner width of the main body portion can increase in a direction from the lower side to the upper side of the main body portion 110.

[0070] Further, the main spout portion 210 can further include a spouting wall 211 having a predetermined height and formed on the lower portion of the main spout portion 210. Further, the spouting wall 211 can be formed to define a predetermined angle with respect to the width direction of the main spout portion 210. The spouting wall 211 can guide air spouted from the spouting passage 220. The spouting wall 211 allows air to be dispersed over a large area of the surface of the object, which can increase the area where foreign substances are separated.

[0071] The spouting passage 220 is formed in the main spout portion 210 and is configured to separate foreign substances. Further, the spouting passage 220 can be formed in the lower portion of the main spout portion 210 and positioned adjacent to the object including foreign substances. The spouting passage 220 passes through the main spout portion 210, and air can be discharged through all surfaces of the spouting passage 220.

[0072] In the foreign matter removing apparatus 1000 according to the present application, foreign matter separated by air sprayed from the spray channel 220 can be suctioned into the channel 120 and removed. Accordingly, the spray channel 220 can correspond to the channel 120 in shape and number.

[0073] That is, the length and height of the channel 120 can decrease in a direction from the front end of the main body part 110 to a portion to which the discharge part 130 is connected. Accordingly, the length and height of the spray channel 220 can decrease in a direction from the front end of the main spray body part 210 to a portion to which the spray port part 230 is connected, and the spray channel 220 can have a hook shape corresponding to the shape of the channel 120. In other words, the spray channel 220 can include an air spray part (not shown) disposed adjacent to foreign matter and a second guide part (not shown) configured to supply air to the air spray part. The air spray part can have a straight shape, and the second guide part can have a curved shape.

[0074] The spray port part 230 can be disposed at and extend from the rear end of the main spray body part 210. Further, the spray port part 230 can be positioned at one side of the discharge part 130.

[0075] The spray port part 230 can be connected to an external pump, generate an air flow in an inner space of the main spray body part 210, and supply air to the spray channel 220. In this case, the rear end of the main spray body part 210 can refer to an end of the spray port part 230 at which air is initially supplied.

[0076] The spray port part 230 can be smaller in length and diameter than the discharge part 130. Accordingly, the diameter of the spray port part 230 can decrease in a direction opposite to a direction in which air is introduced.

[0077] The main body part 110 according to another embodiment can further include a suction wall 111. The suction wall 111 is configured to allow air suctioned into the suction part 100 to flow smoothly. Further, the suction wall 111 can be formed at a lower end of the main body part 110 and have a predetermined height.

[0078] In this case, the width of the main body part 110 represents the shortest horizontal length, the length of the main body part 110 represents the longest length, and the height of the main body part 110 represents a length in a direction perpendicular to the length representing the width of the main body part 110.

[0079] The flow ratio between the suction part 100 and the spray part 200 according to the present application can be 4:1 to 8:1. In this case, the flow ratio can be a ratio between an amount of air suctioned by the suction part 100 and an amount of air sprayed from the spray part 200.

[0080] According to the foreign matter removing device 1000 of the present application, the air sprayed from the spraying portion 200 collides with the surface of the object and is scattered in all directions together with the foreign matter, and the suction portion 100 suctions the air scattered in all directions, so that the air swirls on the surface of the object, which enables the suction portion 100 to smoothly suction the foreign matter.

[0081] Figure 7 FIG. 1 is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device according to the present application, based on a flow ratio between a suction portion and a spraying portion. Figure 7 FIG. 1(a) is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device when only a suction portion 100 is used to remove foreign matter, Figure 7 FIG. 1(b) is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device when a flow ratio is 8:1, and Figure 7 FIG. 1(c) is a view illustrating a flow rate distribution of an air flow generated in a foreign matter removing device when a flow ratio is 4:1.

[0082] Referring to Figure 7 When a flow ratio between the suction portion 100 and the spraying portion 200 is less than 4:1 or no air flow is generated in the spraying portion 200, the air flow stagnates on the surface of the object, which causes a problem in that the degree to which the spraying portion 200 separates the foreign matter or the degree to which the suction portion 100 suctions the foreign matter decreases. In addition, in the case where the flow ratio is greater than 8:1, the suction portion 100 suctions a greater amount of air stagnating on the surface of the object than the air sprayed from the spraying portion 200, which causes a problem in that the air cannot smoothly flow in the suction portion 100.

[0083] [Example 1]

[0084] The foreign matter removing device 1000 according to Example 1 of the present application is a foreign matter removing device 1000 in which the main body portion 110 has a length of 580 mm and a height of 68 mm, and twelve channels 120 are formed at one side portion of the main body portion 110.

[0085] [Example 2]

[0086] The foreign matter removing device 1000 according to Example 2 of the present application is a foreign matter removing device 1000 in which the main body portion 110 has a length of 180 mm and a height of 68 mm, and four channels 120 are formed at one side portion of the main body portion 110.

[0087] [Table 1]

[0088] Channel number Uniformity index Standard deviation Mean velocity (m / s) Channel 1 0.9 2.56 10.61 Channel 2 0.81 4.27 10.65 Channel 3 0.87 3.74 11.01 Channel 4 0.89 2.61 10.61 Channel 5 0.91 2.28 11.08 Channel 6 0.94 1.44 11.30 Channel 7 0.95 1.4 11.60 Channel 8 0.96 0.94 12.15 Channel 9 0.97 0.61 11.63 Channel 10 0.97 1.03 11.17 Channel 11 0.97 0.63 11.84 Channel 12 0.98 0.54 11.17 Mean value 0.93 2.63 11.27

[0089] [Table 2]

[0090] Channel number Uniformity index Standard deviation Mean velocity (m / s) Channel 1 0.96 3.68 36.81 Channel 2 0.95 4.67 34.94 Channel 3 0.95 4.28 34.86 Channel 4 0.95 3.84 33.30 Mean value 0.95 4.32 34.70

[0091] Table 1 shows experimental results of measuring the uniformity index, standard deviation, and average rate of the flow rate in the plurality of channels 120 in the case where the foreign matter removing device 1000 according to Example 1 of the present application aspirates foreign matter at a discharge flow rate of 680 LPM (liters per minute). In addition, Table 2 shows experimental results of measuring the uniformity index, standard deviation, and average rate of the flow rate in the plurality of channels 120 in the case where the foreign matter removing device 1000 according to Example 2 of the present application aspirates foreign matter at a discharge flow rate of 680 LPM. Figure 8 is a view illustrating a flow rate distribution of an air flow generated in the foreign matter removing device according to Example 1 of the present application, and Figure 9 is a view illustrating a flow rate distribution of an air flow generated in the foreign matter removing device according to Example 2 of the present application.

[0092] As the uniformity index of the flow rate in the channels 120 becomes closer to 1, the deviation between the flow rates in the channels can decrease. Referring to Table 1 and Figure 8 It can be seen that, in the case of the foreign matter removing device 1000 according to Example 1 of the present application, the uniformity index of the flow rate in the channels 120 is as high as 0.93, which is close to 1, and there is no significant difference between the average rate of each of the channels 120 and the total average rate of 11.27. In this case, the average rate of each of the channels 120 can represent the average rate at which air is aspirated, ejected, or moved in each of the channels.

[0093] In the foreign matter removing device 1000, in the case where the flow rates in the plurality of channels 120 are equal or uniform, i.e., in the case where the average of the flow rates in the plurality of channels 120 and the average of the flow rates in each of the plurality of channels 120 is close to 1, all of the channels can uniformly remove foreign matter, which makes it possible to reduce the area in which foreign matter remains on the object from which foreign matter is to be separated and removed.

[0094] In addition, in the foreign matter removing device 1000, when the average rate in each of the channels 120 is similar to the total average rate value, all of the plurality of channels 120 can remove the same amount or a similar amount of foreign matter without partial deviation, which makes it possible to smoothly remove foreign matter from the entire area of the object, rather than removing foreign matter only from a specific portion.

[0095] Referring to Table 2 and Figure 9It can be seen that, in the case of the foreign matter removing device 1000 according to Example 2 of the present application, the uniformity index of the flow rate in the passages 120 is as high as 0.95, which is close to 1, and there is no significant difference between the average rate in each of the passages 120 and the total average rate of 34.70.

[0096] Accordingly, it can be seen that the foreign matter removing device 1000 for removing foreign matter according to position according to the present application forms a relatively uniform flow rate in the foreign matter removing device 1000 by adjusting the length and shape of the plurality of passages 120 differently according to the number of passages.

[0097] The only shape and number of the passages used in Example 1 and Example 2 are configured to be different, but the other configurations of the structure and shape are the same as each other.

[0098] <Experimental Example>

[0099] The uniformity of the suction portion and the injection portion and the average rate in the passages of the suction portion and the passages of the injection portion were measured by using the foreign matter removing device according to the present application. In this case, the flow rate in the suction portion was 1080 LPM, and the flow ratio between the suction portion and the injection portion was 4:1.

[0100] [Table 3]

[0101]

[0102] [Table 4]

[0103]

[0104]

[0105] Table 3 shows the results of measuring the uniformity (uniformity index) of the rate in the passages of the suction portion and the passages of the injection portion, and Table 4 shows the results of measuring the average rate of the rate in the inlets of the passages of the suction portion and the inlets of the passages of the injection portion. Referring to Table 3 and Table 4, in the foreign matter removing device according to the present application, the uniformity index of the flow rate in the passages of the suction portion and the uniformity index of the flow rate in the passages of the injection portion are 0.97 and 0.86, respectively, which are close to 1, which shows very high uniformity.

[0106] In addition, it can be seen that there is no significant difference between the average rate in the passages of the suction portion and the total average rate of 9.09, and the average rate in the passages of the injection portion and the total average rate of 28.04.

[0107] Accordingly, it can be seen that the position-dependent foreign matter removing device according to the present application forms a relatively uniform flow rate in the foreign matter removing device by adjusting the flow ratio between the suction portion and the injection portion.

[0108] While the present application has been described with reference to exemplary embodiments, it is to be understood that various other modifications can be made without departing from the spirit and scope of the application disclosed in the claims.

Claims

1. A foreign object removal device, the foreign object removal device comprising: The suction section includes: a main body; a plurality of channels formed on one side of the main body and configured to suction foreign objects; and a discharge section configured to provide suction force to the channels and discharge the foreign objects to the outside. The injection section includes: a main injection body portion located on one side of the main body portion; a plurality of injection channels formed in the main injection body portion and configured to separate the foreign object and corresponding to the channels in shape and number; and an injection port portion located on one side of the discharge section and configured to supply air to the injection channels. The main jet portion is located on one side of the main body portion, and both the main body portion and the main jet portion are configured to have an internal width that increases in the direction from the lower surface to the upper surface. A space is formed between the main body portion and the main jet portion. Wherein, based on a direction perpendicular to the main body, one side of the channel has a straight shape, and the other side of the channel has a curved shape, and wherein the channel is formed in such a shape that the length of the channel decreases as the distance from the discharge portion decreases.

2. The foreign object removal device according to claim 1, wherein, The channel includes: An air suction section is provided adjacent to the lower portion of the main body; and A first guiding portion is configured to guide the foreign object, causing the foreign object in the main body portion to move to the discharge portion.

3. The foreign object removal device according to claim 2, wherein, The injection channel includes: An air injection section is provided adjacent to the lower portion of the main injector portion; and The second guide portion is configured to supply the air to the air injection portion.

4. The foreign object removal device according to claim 2, wherein, The air suction portion of the channel has a straight shape, and the first guide portion has a curved shape.

5. The foreign object removal device according to claim 3, wherein, The air jet portion has a straight shape, and the second guide portion has a curved shape.

6. The foreign object removal device according to claim 2, wherein, The end of the first guide portion extends toward the discharge portion.

7. The foreign object removal device according to claim 1, wherein, The injection channel is shaped such that its length decreases as the distance from the injection port portion decreases.

8. The foreign object removal device according to claim 1, wherein, The internal width of the main body portion and the internal width of the main jet portion increase in the direction from one side where the channel and the jet channel are formed toward the other side.

9. The foreign object removal device according to claim 1, wherein, The number of channels is four to twelve, and the number of injection channels is four to twelve.

10. The foreign object removal device according to claim 1, wherein, Both the channel and the injection channel have a hook shape.

11. The foreign object removal device according to claim 1, wherein, The length of each of the main body portion and the main jet portion is between 180 mm and 580 mm.

12. The foreign object removal device according to claim 1, wherein, The main body and the main jet body are positioned to be spaced apart from each other by a predetermined distance.

13. The foreign object removal device according to claim 1, wherein, The main body portion further includes a suction wall disposed at the lower portion of the main body portion and having a predetermined height, and the main jet portion further includes a jet wall disposed at the lower portion of the main jet portion and having a predetermined height.

14. The foreign object removal device according to claim 1, wherein, The flow ratio between the channel and the injection channel is 4:1 to 8:

1.

15. The foreign object removal device according to claim 1, wherein, The suction device is located at one end of the discharge section and is configured to suction the foreign object.

16. The foreign object removal device according to claim 1, wherein, The pump configured to draw in the foreign matter and the pump configured to separate the foreign matter are respectively located at one end of the discharge section and one end of the injection port section.

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