Dust removal device

Abstract

A dust-removing device 100 comprises: a cover plate 102 which covers a sensor detection unit 10; and a blowing unit 104 which has a buffer tank 106, a Coanda flow path 108, and an outlet 110, and which blows a fluid F onto the cover plate 102. The buffer tank 106 temporarily stores the fluid F. The Coanda flow path 108 connects the buffer tank 106 and the outlet 110, has a curved Coanda surface 114, and guides, to the outlet 110, fluid F that has flowed into the Coanda flow path 108 from the buffer tank 106, while drawing the fluid F toward the Coanda surface 114 via the Coanda effect. The outlet 110 outputs the fluid F in a direction along the surface of the cover plate 102.

Description

Technical Field

[0001] The present disclosure relates to a dust removing device.

Background Art

[0002] Conventionally, a battery in which a wound electrode group and an electrolytic solution are housed in a cylindrical outer can is known (see, for example, Patent Document 1). A wound electrode group is formed by continuously conveying a long electrode plate and a long separator to a lamination position, laminating them on each other, and winding the obtained laminate.

[0003] When laminating an electrode plate and a separator, it is desirable to laminate them such that the end portions in the width direction do not shift from each other. Therefore, generally, when conveying a conveyed object such as an electrode body, the conveyed object is conveyed while detecting the position of the end portion of the conveyed product with an edge sensor, and if a shift of the end portion is detected, the shift is adjusted by an edge position controller, thereby preventing the shift of the end portion. In addition, when conveying other elongated bodies not limited to electrode plates and separators, an edge sensor and an edge position controller are sometimes used to prevent positional displacement of end portions.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] If dust accumulates on the sensor detection unit, accurate detection of the end portion becomes difficult. Therefore, a fluid such as air is sometimes blown onto the sensor detection unit to blow off and remove dust accumulated on the sensor detection unit. In order to remove dust more reliably, it is conceivable to increase the flow rate of the fluid. However, if the flow rate is increased indiscriminately, there is a risk that dust will scatter and adhere to the conveyed object. For this reason, it is desired to efficiently remove dust from the sensor detection unit while suppressing the flow rate of the fluid.

[0006] This disclosure is made in light of these circumstances, and one of its purposes is to provide a technology that improves the efficiency of dust removal. [Means for solving the problem]

[0007] One aspect of this disclosure is a dust removal device. This device comprises a cover plate that covers a sensor detection unit, a buffer tank, a Coanda channel, and a blow unit that has a blow outlet and blows fluid onto the cover plate. The buffer tank temporarily stores the fluid. The Coanda channel connects the buffer tank and the blow outlet and has a curved Coanda surface, guiding the fluid flowing from the buffer tank into the Coanda channel to the blow outlet while being drawn towards the Coanda surface side by the Coanda effect. The blow outlet blows the fluid in a direction along the surface of the cover plate.

[0008] Any combination of the above components, as well as any conversion of the expressions of this disclosure between methods, apparatus, systems, etc., are also valid forms of this disclosure. [Effects of the Invention]

[0009] According to this disclosure, it is possible to improve the efficiency of dust removal. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1(A) is a perspective view of an edge control mechanism to which the dust removal device according to the embodiment is applied. Figure 1(B) is a perspective view of an edge sensor. [Figure 2] Figure 2(A) is a perspective view of a dust removal device according to a reference example. Figure 2(B) is a cross-sectional view of a dust removal device according to a reference example. [Figure 3] Figure 3(A) shows the results of an airflow analysis for a dust removal device according to the reference example. Figure 3(B) is a photograph showing the results of dust removal using the dust removal device according to the reference example. [Figure 4]Figure 4(A) is a perspective view of the dust removal device according to the embodiment. Figure 4(B) is a cross-sectional view of the dust removal device according to the embodiment. [Figure 5] Figure 5(A) shows the results of an airflow analysis for a dust removal device according to the embodiment. Figure 5(B) is a photograph showing the results of dust removal using the dust removal device according to the embodiment. [Figure 6] This is a cross-sectional view of a dust removal device according to Modified Example 1. [Figure 7] This is a cross-sectional view of a dust removal device according to modified example 2. [Figure 8] This is a cross-sectional view of a dust removal device according to modified example 3. [Figure 9] This is an exploded perspective view of the blow section of the dust removal device according to Modification 4. [Modes for carrying out the invention]

[0011] The present disclosure will be described below with reference to the drawings, based on preferred embodiments. The embodiments are illustrative and not limiting, and not all features or combinations thereof described in the embodiments are necessarily essential to the present disclosure. The same or equivalent components, members, and processes shown in each drawing are denoted by the same reference numerals, and redundant descriptions are omitted where appropriate. The scale and shape of each part shown in each drawing are set for convenience to facilitate explanation and are not to be interpreted restrictively unless otherwise specified. Furthermore, where terms such as "first," "second," etc. are used in this specification or claims, unless otherwise specified, these terms do not indicate any order or importance, but are used to distinguish one configuration from another. In addition, some components that are not important for explaining the embodiments are omitted in each drawing.

[0012] Figure 1(A) is a perspective view of the edge control mechanism 1 to which the dust removal device according to the embodiment is applied. Figure 1(B) is a perspective view of the edge sensor 2. Note that the dust removal device is not shown in Figure 1(A).

[0013] The edge control mechanism 1 comprises an edge sensor 2 and an edge position controller 4. As an example, the edge sensor 2 includes a light-emitting sensor 6 and a light-receiving sensor 8. The light-emitting sensor 6 and the light-receiving sensor 8 are positioned at a predetermined distance from each other so that the conveyed object W passes between them. The conveyed object W is a long object continuously conveyed by a known roll conveying mechanism or the like. The positional relationship of the conveyed object W to each sensor is determined such that its end in the width direction B passes between the light-emitting sensor 6 and the light-receiving sensor 8. The conveyed object W may be a battery component material such as an electrode plate or separator, or it may be another long object.

[0014] The light-emitting sensor 6 emits light L of a predetermined wavelength towards the light-receiving sensor 8. The light-receiving sensor 8 has a sensor detection unit 10 on the surface facing the light-emitting sensor 6. The sensor detection unit 10 is, for example, a light-receiving element and receives the light L emitted from the light-emitting sensor 6. A portion of the light L emitted from the light-emitting sensor 6 is blocked by the edge of the transported object W. Therefore, the edge sensor 2 can detect the position of the edge of the transported object W based on the position where the sensor detection unit 10 receives the light L.

[0015] The edge position controller 4 includes a support roll 12 and a rotating base 14. The support roll 12 is a cylindrical body extending in the width direction B, and supports the conveyed object W with its circumferential surface. The edge position controller 4 of this embodiment has two support rolls 12 arranged at a predetermined distance apart in the conveying direction A. Each support roll 12 rotates while supporting the conveyed object W, assisting in the conveying of the object W. The rotating base 14 supports each support roll 12 and rotates around a rotation axis 14a. This allows the angle of each support roll 12 with respect to the conveying direction A to be changed. The rotating base 14 receives a signal indicating the detection result from the edge sensor 2 and changes the angle of each support roll 12 according to the signal. This allows the direction in which the conveyed object W moves to be changed locally. As a result, the position of the end of the conveyed object W can be adjusted.

[0016] When dust accumulates on the sensor detection unit 10, light reception at the sensor detection unit 10 may be blocked. In this case, there is a risk that the position of the end portion of the conveyed object W may be erroneously detected. For this reason, it is desirable to remove dust that accumulates on the sensor detection unit 10. Accordingly, the light-receiving sensor 8 is provided with a dust removing device. The dust is, for example, a constituent material of the conveyed object W that falls off from the conveyed object W, or processing scraps generated by processing the conveyed object W. For example, when the conveyed object W is an electrode plate, the dust is an electrode active material or the like peeled off from the electrode plate. The dust removing device will be described below. Note that the dust removing device may be provided on the light-emitting sensor 6 side in some cases. Further, the installation target of the dust removing device is not limited to the edge sensor 2.

[0017] Prior to describing the dust removing device according to the present embodiment, first, a dust removing device 900 according to a reference example will be described. FIG. 2(A) is a perspective view of the dust removing device 900 according to the reference example. FIG. 2(B) is a cross-sectional view of the dust removing device 900 according to the reference example. The dust removing device 900 is arranged so as to align with the light-receiving sensor 8 in the conveyance direction A. The dust removing device 900 includes a blowing unit 902 that blows a fluid F onto the sensor detection unit 10. The fluid F is, for example, a gas such as air.

[0018] The blowing unit 902 includes a flow path 904 and an outlet 906. The flow path 904 extends linearly in the width direction B. One end side of the flow path 904 is connected to a fluid supply device such as a compressor (not shown), and the fluid F flows into the flow path 904 from the one end side. The other end side of the flow path 904 is connected to the outlet 906. The fluid F in the flow path 904 is blown out to the outside from the outlet 906. The outlet 906 has an elongated shape extending in the width direction B, and blows out the fluid F in the conveyance direction A. That is, the fluid F is blown laterally onto the sensor detection unit 10. The position of the outlet 906 in the width direction B is determined so as to overlap the entire extending range of the sensor detection unit 10 in the width direction B.

[0019] FIG. 3(A) is a diagram showing results of airflow analysis for a dust removing apparatus 900 according to a reference example. FIG. 3(A) shows a flow velocity distribution of a fluid F blown out from an air outlet 906. The left side in FIG. 3(A) corresponds to one end side of a flow path 904, that is, the side into which the fluid F flows into the flow path 904. FIG. 3(B) is a photograph showing results of removing dust D using the dust removing apparatus 900 according to the reference example. This photograph is obtained by performing a test of driving the dust removing apparatus 900 while dropping dust D onto a sensor detection unit 10, attaching an adhesive sheet to the sensor detection unit 10 after the test to transfer the dust D on the sensor detection unit 10 to the adhesive sheet, and photographing the adhesive sheet. Black portions in FIG. 3(B) correspond to the dust D.

[0020] As shown in FIG. 3(A), in the dust removing apparatus 900 of the reference example, the airflow is deviated from the region on the sensor detection unit 10 in the longitudinal direction of the air outlet 906. Specifically, almost no fluid F flows in a portion close to the upstream side of the flow path 904 in the region on the sensor detection unit 10. For this reason, as shown in FIG. 3(B), the dust D remains on the sensor detection unit 10.

[0021] Next, the dust removing apparatus 100 according to the present embodiment will be described. FIG. 4(A) is a perspective view of the dust removing apparatus 100 according to the embodiment. FIG. 4(B) is a cross-sectional view of the dust removing apparatus 100 according to the embodiment. The dust removing apparatus 100 includes a cover plate 102 that covers the sensor detection unit 10, and a blowing unit 104 that blows a fluid F onto the cover plate 102.

[0022] The cover plate 102 is a plate material extending in the transport direction A and the width direction B, and preferably covers the entire sensor detection unit 10. The cover plate 102 is made of a material that can transmit at least the light L irradiated from the light emission sensor 6. Preferably, the cover plate 102 is made of a material selected from the group consisting of polyethylene terephthalate, polycarbonate, and glass. By making the cover plate 102 out of these materials, it is possible to suppress a decrease in the light transmittance of the cover plate 102 when an alcohol-based solvent is used to clean the cover plate 102. Therefore, a decrease in the detection accuracy of the edge sensor 2 can be suppressed.

[0023] The blow section 104 is positioned to be aligned with the light receiving sensor 8 in the transport direction A. The blow section 104 includes a buffer tank 106, a Coanda flow path 108, and a blow outlet 110. The buffer tank 106 temporarily stores the fluid F. As an example, the buffer tank 106 is approximately rectangular parallelepiped in shape. The buffer tank 106 has an opening 112 that connects the inside and outside of the buffer tank 106. A fluid supply device (not shown), such as a compressor, is connected to the opening 112, and the fluid F flows into the buffer tank 106 from the opening 112.

[0024] The Coanda channel 108 connects the buffer tank 106 and the outlet 110, guiding the fluid F in the buffer tank 106 to the outlet 110. In this embodiment, one end of the Coanda channel 108 is connected to the ceiling surface 106a of the buffer tank 106. The ceiling surface 106a is the surface facing the conveyed object W. The other end of the Coanda channel 108 is connected to the outlet 110. The ceiling surface 106a is located further away from the conveyed object W than the outlet 110. Therefore, the Coanda channel 108 extends approximately in a direction toward the conveyed object W from the ceiling surface 106a.

[0025] The Coanda channel 108 has a curved Coanda surface 114. The Coanda surface 114 is arc-shaped in a cross-sectional view perpendicular to the width direction B. The Coanda surface 114 extends from the ceiling surface 106a side towards the conveyed object W, and as it approaches the conveyed object W, it approaches the sensor detection unit 10. Due to the Coanda effect exerted by the Coanda surface 114, the Coanda channel 108 can guide the fluid F flowing through the Coanda channel 108 towards the Coanda surface 114 side and towards the outlet 110.

[0026] The outlet 110 is elongated and extends parallel to the surface of the cover plate 102. In this embodiment, the outlet 110 extends in the width direction B. The outlet 110 is positioned to blow out the fluid F in a direction along the surface of the cover plate 102. The position of the outlet 110 in the width direction B is determined to overlap with the entire extent of the sensor detection unit 10 in the width direction B. The outlet 110 is positioned at the end of the cover plate 102 in the transport direction A and blows out the fluid F in the transport direction A substantially parallel to the surface of the cover plate 102.

[0027] Figure 5(A) shows the results of an airflow analysis for the dust removal device 100 according to the embodiment. Figure 5(A) shows the flow velocity distribution of the fluid F blown out from the outlet 110. Figure 5(B) is a photograph showing the results of removing dust D using the dust removal device 100 according to the embodiment. This photograph was taken after conducting a test in which the dust removal device 100 was driven while dust D was lowered onto the sensor detection unit 10, and then an adhesive sheet was attached to the sensor detection unit 10 after the test to transfer the dust D on the sensor detection unit 10 to the adhesive sheet, and the adhesive sheet was photographed. The black area in Figure 5(B) corresponds to dust D.

[0028] As shown in Figure 5(A), in the dust removal device 100 of this embodiment, fluid F flows over the entire area above the sensor detection unit 10. Therefore, as shown in Figure 5(B), no dust D remains on the sensor detection unit 10.

[0029] As described above, the dust removal device 100 of this embodiment includes a cover plate 102 that covers the sensor detection unit 10 and a blow unit 104 that blows fluid F onto the cover plate 102. The blow unit 104 has a buffer tank 106, a Coanda flow path 108, and a blow outlet 110. The buffer tank 106 temporarily stores the fluid F. This reduces variations in the pressure of the fluid F. Therefore, it is possible to reduce variations in the flow velocity of the fluid F in the longitudinal direction of the blow outlet 110.

[0030] The Coanda channel 108 guides the fluid F in the buffer tank 106 to the outlet 110. The Coanda channel 108 also has a curved Coanda surface 114. The Coanda channel 108 guides the fluid F that flows from the buffer tank 106 into the Coanda channel 108 to the outlet 110, drawing it towards the Coanda surface 114 due to the Coanda effect. This gives directionality to the fluid F blown out from the outlet 110, allowing control of the direction of discharge. As a result, the fluid F can flow over the entire area above the sensor detection unit 10. In addition, the airflow can be concentrated over the sensor detection unit 10.

[0031] The outlet 110 is elongated and extends parallel to the surface of the cover plate 102, blowing out the fluid F in a direction along the surface of the cover plate 102. The mounting surface of the sensor detection unit 10 in the light receiving sensor 8 may not be flat. Therefore, even if the fluid F is blown out in a direction along the mounting surface, the airflow may be disturbed by the unevenness of the mounting surface, and the fluid F may not flow uniformly over the entire sensor detection unit 10. In contrast, by covering the sensor detection unit 10 with the cover plate 102 and blowing the fluid F along the surface of the cover plate 102, it becomes easier to generate a uniform airflow over the entire area on the sensor detection unit 10.

[0032] In this way, the buffer tank 106 reduces pressure variations in the fluid F, the Coanda flow path 108 directs the airflow, and the fluid F flows along the surface of the flat cover plate 102 covering the sensor detection unit 10, allowing the airflow to be uniformly applied to the entire area on the sensor detection unit 10. This makes it possible to remove dust D by focusing on the minimum necessary area. Therefore, the efficiency of dust D removal can be improved. As a result, the amount of scattered dust D can be reduced, and the risk of dust D adhering to the conveyed object W can be reduced.

[0033] Preferably, a cover plate 102 larger than the area of ​​the sensor detection unit 10 is used. This allows the dust D removed from the area on the sensor detection unit 10 to accumulate on the outer edge of the cover plate 102. This further reduces the risk of the dust D scattering and adhering to the conveyed object W.

[0034] The embodiments of this disclosure have been described in detail above. The embodiments described above are merely examples of how to implement this disclosure. The content of the embodiments does not limit the technical scope of this disclosure, and many design changes, such as changes, additions, and deletions of components, are possible as long as they do not depart from the spirit of the invention as defined in the claims. A new embodiment with design changes will have the combined effects of both the embodiment and the variation. In the embodiments described above, the content in which such design changes are possible is emphasized with notations such as "of this embodiment" or "in this embodiment," but design changes are also permitted even if there are no such notations. Furthermore, any combination of components included in each embodiment is also valid as an embodiment of this disclosure. The hatching applied to the cross-section in the drawings does not limit the material of the object to which the hatching is applied.

[0035] (Variation 1) Figure 6 is a cross-sectional view of the dust removal device 100 according to Modification 1. The shape of the Coanda flow path 108 in this modification differs from that of the embodiment. Specifically, the Coanda flow path 108 in this modification has a straight section 116 that extends parallel to the surface of the cover plate 102 between the outlet 110 and the Coanda surface 114. The straight section 116 in this modification is continuous with the outlet 110.

[0036] By providing the straight section 116, an airflow can be generated near the outlet 110 that rises from the surface of the cover plate 102. This rising airflow can reduce the falling speed of the dust particles D that fall onto the sensor detection unit 10. This makes it easier to push the dust particles D that fall onto the sensor detection unit 10 to an area outside the sensor detection unit 10.

[0037] (Modification 2) Figure 7 is a cross-sectional view of the dust removal device 100 according to Modification 2. The dust removal device 100 of this modification differs from the embodiment in the shape of the cover plate 102. That is, the cover plate 102 of this modification has a convex surface that curves away from the sensor detection unit 10. By making the cover plate 102 R-shaped in this way, the surface of the cover plate 102 can function as a Coanda surface, allowing the fluid F to flow while being attracted to the surface of the cover plate 102. This makes it easier to remove dust D that accumulates on the surface of the cover plate 102.

[0038] If the cover plate 102 has a convex surface, it is preferable to position it so that the end of the outlet 110 on the sensor detection part 10 side and the apex of the convex surface are at the same height. This makes it easier to guide the fluid F along the surface of the cover plate 102.

[0039] (Variation 3) Figure 8 is a cross-sectional view of the dust removal device 100 according to Modification 3. In this modified dust removal device 100, the arrangement of the connection portion 118 between the buffer tank 106 and the Coanda flow path 108 differs from that of the embodiment. That is, in a cross-section perpendicular to the longitudinal direction of the outlet 110, i.e., the width direction B, the center C1 of the connection portion 118 between the buffer tank 106 and the Coanda flow path 108 is offset from the center C2 of the internal space of the buffer tank 106 in the direction in which the sensor detection unit 10 and the blowing unit 104 are aligned, i.e., in the transport direction A. The connection portion 118 is an opening provided on the ceiling surface 106a that connects the internal space of the buffer tank 106 and the Coanda flow path 108. Center C1 is, for example, the geometric center of the opening. Center C2 is, for example, the volume center of the buffer tank 106, in other words, the geometric center of the shape of the internal space of the buffer tank 106.

[0040] By decentering the center C1 of the connection part 118 with respect to the center C2 of the buffer tank 106, the direction of the fluid F discharge from the outlet 110 (the discharge direction in the extending direction of the cover plate 102) can be more easily directed towards the area on the sensor detection unit 10. The direction (or amount) of offsetting the center C1 of the connection part 118 with respect to the center C2 of the buffer tank 106 (either closer to or further away from the sensor detection unit 10) can be appropriately set according to the direction in which the fluid F is to be discharged. The reason why the discharge direction of the fluid F can be adjusted by offsetting the two centers C1 and C2 is thought to be because the offset of the two centers C1 and C2 affects the Coanda effect exhibited by the Coanda surface 114. This phenomenon was discovered by the inventors after diligent research.

[0041] (Modification 4) Figure 9 is an exploded perspective view of the blow section 104 of the dust removal device 100 according to Modification 4. The shape of the blow section 104 of the dust removal device 100 in this modification differs from that of the embodiment. That is, the blow section 104 of this modification has a first block 120 and a second block 122. The first block 120 and the second block 122 are made of metal, resin, or the like with desired rigidity. Each block has a recess 124 corresponding to a part of the buffer tank 106 and a part of the Coanda flow path 108, and a slit 126 corresponding to a part of the outlet 110.

[0042] The first block 120 and the second block 122 are stacked such that their respective recesses 124 and slits 126 face each other. The first block 120 and the second block 122 are stacked in the width direction B. A packing 128 is placed between the first block 120 and the second block 122. By placing the packing 128 between the two blocks, leakage of fluid F from the gap between the two blocks can be suppressed.

[0043] Furthermore, the first block 120 and the second block 122 are fixed to each other while being relatively offset around a virtual rotation axis X that extends in the stacking direction (width direction B in this embodiment). The first block 120 and the second block 122 can be fixed to each other by known methods such as adhesive bonding or screw fastening. For example, the first block 120 is rotated around the virtual rotation axis X such that the slit 126 is displaced in a direction away from the cover plate 102. The second block 122 is rotated around the virtual rotation axis X such that the slit 126 is displaced in a direction approaching the cover plate 102. Therefore, at the outlet 110, the region formed by the slit 126 of the first block 120 blows out the fluid F at an elevation angle relative to the surface of the cover plate 102. On the other hand, the region formed by the slit 126 of the second block 122 blows out the fluid F at a depression angle relative to the surface of the cover plate 102.

[0044] By varying the blowing angle of the fluid F from the outlet 110 (the elevation / depression angle relative to the surface of the cover plate 102) along the longitudinal direction of the outlet 110, it is possible to more easily direct the blowing direction of the fluid F from the outlet 110 (the blowing direction in the extending direction of the cover plate 102) towards the area on the sensor detection unit 10. The rotation direction and amount of rotation of the first block 120 and the second block 122 can be appropriately set according to the direction in which the fluid F is to be blown out. The reason why the blowing direction of the fluid F can be adjusted by varying the blowing angle of the fluid F along the longitudinal direction of the outlet 110 is thought to be because a difference in flow velocity occurs between the fluid F blown out from the area on the first block 120 side and the fluid F blown out from the area on the second block 122 side in the vicinity of the outlet 110. This phenomenon was discovered by the inventors after diligent research.

[0045] The embodiments may be specified by the items described below. [Item 1] A cover plate (102) that covers the sensor detection unit (10), It comprises a buffer tank (106), a Coanda flow path (108), and a blow section (104) that has a blow outlet (110) and blows fluid (F) onto a cover plate (102), The buffer tank (106) temporarily stores the fluid (F), The Coanda channel (108) connects the buffer tank (106) and the outlet (110), and has a curved Coanda surface (114). The fluid (F) flowing from the buffer tank (106) into the Coanda channel (108) is guided to the outlet (110) by the Coanda effect, while being drawn towards the Coanda surface (114). The outlet (110) blows the fluid (F) in a direction along the surface of the cover plate (102). Dust removal equipment (100). [Item 2] The Coanda flow path (108) has a straight section (116) between the outlet (110) and the Coanda surface (114) that extends parallel to the surface of the cover plate (102). The dust removal device (100) described in item 1. [Item 3] The cover plate (102) has a convex surface that is curved away from the sensor detection unit (10). A dust removal device (100) as described in item 1 or 2. [Item 4] In a cross-section perpendicular to the longitudinal direction of the outlet (110), the center (C1) of the connection portion (118) between the buffer tank (106) and the Coanda flow path (108) is offset from the center (C2) of the internal space of the buffer tank (106) in the direction (A) in which the sensor detection unit (10) and the blow unit (104) are aligned. A dust removal device (100) as described in any one of items 1 to 3. [Item 5] The blow section (104) has a first block (120) and a second block (122), Each block (120, 122) has a recess (124) corresponding to a part of the buffer tank (106) and a part of the Coanda flow path (108), and a slit (126) corresponding to a part of the outlet (110). The first block (120) and the second block (122) are stacked such that their respective recesses (124) and slits (126) face each other, and are fixed to each other while being relatively offset about a virtual axis of rotation (X) extending in the stacking direction (B). A dust removal device (100) as described in any of items 1 to 4. [Industrial applicability]

[0046] This disclosure can be used in dust removal devices. [Explanation of Symbols]

[0047] 10 Sensor detection unit, 100 Dust removal device, 102 Cover plate, 104 Blow unit, 106 Buffer tank, 108 Coanda flow path, 110 Outlet, 114 Coanda surface, 116 Straight section, 118 Connection section, 120 First block, 122 Second block, 124 Recess, 126 Slit.

Claims

1. A cover plate that covers the sensor detection unit, It comprises a buffer tank, a Coanda channel, and a blow section that has an outlet and blows fluid onto the cover plate, The buffer tank temporarily stores the fluid, The Coanda channel connects the buffer tank and the outlet and has a curved Coanda surface, and guides the fluid flowing from the buffer tank into the Coanda channel to the outlet while being drawn towards the Coanda surface side by the Coanda effect. The outlet blows the fluid in a direction along the surface of the cover plate. The blow section has a first block and a second block, Each block has a recess corresponding to a part of the buffer tank and a part of the Coanda flow path, and a slit corresponding to a part of the outlet, The first block and the second block are stacked such that their respective recesses and slits face each other, and are fixed to each other while being relatively offset about a virtual axis of rotation extending in the stacking direction. Dust removal equipment.

2. The Coanda flow path has a straight section extending parallel to the surface of the cover plate between the outlet and the Coanda surface. The dust removal device according to claim 1.

3. The cover plate has a convex surface that is curved away from the sensor detection unit. The dust removal device according to claim 1 or 2.

4. In a cross-section perpendicular to the longitudinal direction of the outlet, the center of the connection between the buffer tank and the Coanda flow path is offset from the center of the internal space of the buffer tank in the direction in which the sensor detection unit and the blowing unit are aligned. The dust removal device according to claim 1 or 2.

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