Dielectric powder sorting apparatus and dielectric powder sorting method

Abstract

The present invention relates to a dielectric powder sorting apparatus for sorting dielectric powder by applying an alternating current voltage between a lower electrode and an upper electrode disposed in a chamber, and a method therefor. A dielectric substrate is disposed on the inner bottom surface of the chamber, a lower electrode is formed at the lower end thereof, and an upper electrode is spaced apart from the lower electrode and disposed inside the chamber. A component having a plurality of holes that can be opened / closed may be disposed in the upper electrode or between the lower electrode and the upper electrode. According to the present invention, the movement and separation behavior of the dielectric powder can be precisely controlled, thereby improving sorting efficiency and reliability.

Description

Dielectric powder sorting device and dielectric powder sorting method

[0001] The present invention relates to a technology for sorting dielectric powders, and in particular to an apparatus and method capable of efficiently separating powders according to the size, shape, or surface characteristics of the dielectric powders.

[0002] Powder separation technology has established itself as an essential technology in various industrial fields, including paints, pigments, abrasives, and electronic materials. Traditionally, methods utilizing gravity, centrifugal force, and inertial force have been primarily employed to separate powders based on size or weight. While these methods can be effective under specific conditions, they are time-consuming and have limitations, particularly in precisely separating small particles such as fines. Furthermore, existing technologies relying on physical force have the disadvantage of being unsuitable for separation based on more detailed factors, such as powder shape, electrical properties, and surface characteristics.

[0003] In the present inventor's patent, Registered Patent 10-2725876, to improve this problem, an alternating electric field is applied to the upper and lower parts of dielectric powder within an upright chamber to induce an upward flow of the dielectric powder against gravity, and a technology is provided to sort the powder by utilizing the fact that the degree of upward movement of the powder varies depending on the particle size, shape, density, surface area, or dielectric constant of the dielectric powder. However, this patent has newly discovered that when dielectric powder is thickly stacked within the chamber, large and heavy particles located in the upper layer may obstruct the upward flow of the dielectric powder located in the lower layer due to the electric field, causing a problem where the dielectric powder located in the lower layer cannot rise smoothly. Additionally, when dielectric powder particles are aggregated together, they cannot be separated into individual particles, resulting in a disadvantage where the sorting efficiency by the electric field is reduced.

[0004] The present invention aims to provide an apparatus and method that can compensate for the shortcomings of existing technologies and improve the sorting process of dielectric powders more efficiently and precisely. In particular, it focuses on implementing a technology that enables rapid and precise sorting by utilizing the physical and electrical properties of the powders.

[0005] One objective of the present invention is to provide a dielectric powder sorting device that overcomes the limitations of sorting efficiency and precision found in conventional dielectric powder sorting technology utilizing alternating current electric fields, and prevents problems such as powder being depleted or escaping during sorting.

[0006] Another objective of the present invention is to provide a method for efficiently separating dielectric powders through vigorous flow and separation flow of dielectric powders based on an alternating electric field using the dielectric powder separation device described above.

[0007] In one aspect, the present invention provides a dielectric powder sorting device comprising: an upright chamber having a dielectric substrate disposed on an inner bottom surface; a lower electrode formed at the bottom of the dielectric substrate; an upper electrode located inside the chamber spaced apart from the lower electrode at a certain distance and having a plurality of holes formed therein that can be opened and closed; and a voltage application means for electrically connecting the lower electrode and the upper electrode to apply an alternating voltage.

[0008] The present invention comprises a lower electrode and an upper electrode, which are spaced apart from each other to form an alternating electric field that induces an upward flow of dielectric powder between the dielectric powders to be sorted. In particular, the upper electrode has a plurality of holes formed therein and is designed to be openable and closable. When the holes are open, the dielectric powder flows upward due to the electric field, passes through the upper electrode, reaches the holes, and accumulates on the upper surface of the upper electrode. Through this, light powders can be effectively sorted according to criteria such as the physical properties of the dielectric powder, such as particle size, density, and dielectric constant. On the other hand, when the holes of the upper electrode are closed, a stronger electric field is applied or the alternating frequency of the power source is adjusted to be longer, thereby causing most of the dielectric powder to flow upward, or preferably, most of the powder to flow upward to the upper electrode. Since the upper electrode is maintained in a closed state during this process, it is possible to prevent unwanted powders from rising beyond the upper electrode and mixing with the sorted powders.

[0009] That is, the present invention enables two flow modes, selective flow and vigorous flow, through the opening and closing means of the hole of the upper electrode. In the present invention, selective flow refers to an upward flow in which only some dielectric powders of a specific standard pass through the upper electrode by setting the electric field strength and AC frequency under a given gap between the upper electrode and the lower electrode, and, for example, refers to a flow that selectively selects light powders. In the present invention, vigorous flow refers to a method of flowing dielectric powders while the hole of the upper electrode is closed, in which a stronger electric field than that of selective flow is applied or the AC frequency is adjusted to be longer so that most dielectric powders flow upward, and induces mixing among the powders to compensate for the problem of powders in the lower layer not being selected.

[0010] In one embodiment, a fluid supply unit for supplying a fluid containing polar molecules into the interior of the chamber may be further included.

[0011] Depending on their physical properties, powders may not exhibit interactions such as polarization, charging, or dielectrophoresis within an electric field, or their influence may be so minimal that they do not exhibit fluidity under the force of the electric field. To activate such electrically inert powders, the present invention fills the interior of a chamber with a polar fluid to form a conductive polar film on the surface of the powder. Through this, the powder particles are induced to have a net charge on their surface, allowing them to be affected by the electric field. A fluid supply unit for introducing a fluid containing polar molecules into the chamber serves to convert the atmosphere inside the chamber into a polar atmosphere. This polar atmosphere strengthens the interaction between the powder and the electric field, thereby effectively improving the fluidity of the electrically inert powder. In the present invention, the fluid may contain various polar molecules depending on the requirements of a specific application. For example, the atmosphere inside the chamber can be polarized using a polar gas or liquid (e.g., water, ethanol, methanol, polar gas, etc.). This creates an environment where the force of the electric field can act on the powder, thereby increasing the precision and efficiency of powder sorting.

[0012] In one embodiment, the device may further include an opening / closing means capable of opening and closing a hole in the upper electrode. For example, the opening / closing means may be a plate having a protrusion formed therein that is movable in a vertical direction, wherein the protrusion is formed to correspond to the hole in the upper electrode and is characterized in that the hole in the upper electrode can be opened or closed according to the vertical movement of the opening / closing means. The opening / closing means is a device or mechanism designed to open and close a hole provided in the upper electrode, and may serve to selectively control the flow path by preventing dielectric powder from unintentionally passing through the upper surface of the upper electrode.

[0013] In one embodiment, a transfer device having the function of transferring the separated dielectric powder over the upper electrode in a specific direction may be further included. For example, the transfer device may include a vacuum transfer motor or a powder gallbladder. The vacuum transfer motor is a means for sucking in the powder using vacuum pressure and moving it in a desired direction, and the powder gallbladder is a means designed in the form of a mechanical arm, blade, or broom to physically push and move the powder remaining on the upper electrode.

[0014] In one embodiment, a ridge may be formed at the boundary of the hole of the upper electrode to prevent the dielectric powder separated above the upper electrode from escaping below the upper electrode through the hole of the upper electrode. This ridge forms a physical barrier around the hole of the upper electrode, effectively blocking the powder from flowing downward through the hole, thereby preventing the powder from being remixed or leaking out during the process. In conclusion, the ridge formed at the boundary of the hole of the upper electrode allows dielectric powder that bounces up due to the sorting flow to be contained above the upper electrode, while preventing it from falling downward through the hole; thus, the loss of powder can be minimized and the efficiency of the sorting process can be optimized.

[0015] In another aspect, the present invention provides a dielectric powder sorting method performed in the dielectric powder sorting apparatus described above, comprising: placing dielectric powder on the dielectric substrate; applying an alternating voltage to the upper electrode and the lower electrode such that the electric field and alternating frequency are sufficient to induce vigorous flow of the dielectric powder while the hole of the upper electrode is closed; and applying an alternating voltage to the upper electrode and the lower electrode such that the electric field and alternating frequency are sufficient to induce sorting flow of the dielectric powder while the hole of the upper electrode is open.

[0016] This method begins by placing dielectric powder on a dielectric substrate and applying an alternating current voltage to form an electric field between the upper and lower electrodes. The flow pattern of the dielectric powder can be controlled by adjusting the gap between the upper and lower electrodes, the strength of the electric field between the two electrodes, and the length of the alternating current frequency. Vigorous flow occurs with the hole of the upper electrode closed, and the electric field strength and alternating current frequency are set so that most of the dielectric powder flows upward and at a high level. The electric field, determined by the gap between the electrodes and the voltage magnitude, regulates the electrostatic force of the dielectric powder, while the alternating current frequency determines the length of the upward flow of the dielectric powder. This vigorous flow process disperses aggregation among the dielectric powders or effectively mixes powders located in the lower layer that are unable to flow. Selective flow is performed with the hole of the upper electrode open. By setting the electric field strength and alternating current frequency, only specific dielectric powders (e.g., light or small) are induced to pass through the upper electrode. In this case, the combination of the upper electrode hole size and the electric field causes light powders to selectively rise and move over the upper electrode, allowing them to be separated according to desired criteria.

[0017] In one embodiment, the process may include supplying a fluid containing polar molecules into the interior of the chamber to charge the dielectric powder. Supplying the fluid, which acts as a medium for flow, not only increases the fluidity of the powder and provides a stable separation environment, but also induces charges on the surface of the fluid or forms a film, thereby making flow and separation easier.

[0018] In one embodiment, the method may be characterized by applying a stronger electric field and a voltage of a longer frequency to deagglomerate the aggregated dielectric powder during the vigorous flow. As the electric field strength increases, the force applied to the powder increases, causing the powder to flow more vigorously, and frequent collisions and friction between surfaces occur, thereby maximizing the deagglomeration effect. Additionally, the frequency of the voltage determines the temporal variation of the electric field acting on the powder; at a low frequency, the time during which the electric field acts in a specific direction is longer, resulting in greater displacement while the powder rises or falls, which allows the aggregated powder to be separated more easily. Through this, the aggregated dielectric powder is separated into individual particles, thereby improving the fluidity and separation efficiency of the powder. This process can help facilitate the uniform mixing of the powder and the smooth execution of subsequent processes.

[0019] In one embodiment, vigorous flow can be performed at a narrower gap than the spaced-apart gap between the upper and lower electrodes during sorting flow. As the gap between the electrodes narrows, the strength of the electric field is strengthened, which can induce vigorous flow of the powder. Through this, vigorous flow and sorting flow states can be formed by adjusting the gap between the electrodes, and a person skilled in the art will be able to set an appropriate electrode gap in accordance with the sorting criteria for dielectric powder.

[0020] In one embodiment, the vigorous flow and the sorting flow can be repeated. For example, when sorting the dielectric powder according to particle size, if the dielectric powder is thickly stacked on the dielectric substrate, only the small-sized dielectric powder in the upper layer can flow during the sorting flow process and be sorted to the upper surface of the upper layer. After this process is completed, the lower layer will have a mixture of small and large-sized dielectric powders, and the small-sized dielectric powder in the upper layer will be depleted, leaving only the large-sized dielectric powder. After the small-sized dielectric powder is depleted, the small-sized dielectric powder remaining in the lower layer must be pulled up to the upper layer to enable additional sorting flow. This role can be performed by vigorous flow. Vigorous flow mixes the dielectric powder in the lower layer vertically, helping the small-sized dielectric powder to move upward. Subsequently, if the mixed dielectric powder is sorted again, the same process is repeated, thereby maximizing the efficiency and precision of the separation process.

[0021] In another aspect, the present invention provides a dielectric powder sorting device comprising: an upright chamber having a dielectric substrate disposed on an inner bottom surface; a lower electrode formed at the bottom of the dielectric substrate; an upper electrode disposed at the top spaced apart from the lower electrode within the chamber; a dielectric separation layer positioned between the lower electrode and the upper electrode within the chamber and having a plurality of holes formed therein that can be opened and closed; and a voltage application means for electrically connecting the lower electrode and the upper electrode to apply an alternating current voltage.

[0022] Although the configuration is similar to the first type of dielectric powder separation device described above, there is a decisive difference in that the dielectric powder being separated is separated by a separate component called a dielectric separator rather than by an upper electrode. Since the upper electrode does not perform the function of a filter for separating dielectric powder, it does not need to have holes formed in it; instead, multiple holes are formed in the dielectric separator that performs the filter function. In this case, since the dielectric separator must exist in a region where it can be affected by an electric field, it must be located between the upper electrode and the lower electrode.

[0023] In one embodiment, a fluid supply unit may be further included for supplying a fluid containing polar molecules into the interior of the chamber. The present invention fills the interior of the chamber with a polar fluid to form a conductive polar film on the surface of the powder in order to activate electrically inert powder, thereby allowing the powder to be affected by an electric field. To this end, the fluid supply unit converts the interior of the chamber into a polar atmosphere, and various polar fluids such as water, ethanol, and polar gas can be utilized to improve the fluidity of the powder and increase the precision and efficiency of the separation process.

[0024] In one embodiment, the device may further include an opening / closing means capable of opening and closing a hole in the dielectric separation layer. The opening / closing means capable of opening and closing a hole in the upper electrode is designed as a plate including a protrusion movable in the vertical direction, thereby preventing the dielectric powder from unintentionally passing through the hole and selectively controlling the flow path.

[0025] In one embodiment, a transfer device having the function of transferring the separated dielectric powder over the dielectric separation layer in a specific direction may be further included. The transfer device for moving the separated dielectric powder in a specific direction may be composed of a vacuum transfer motor (which sucks in and moves the powder using vacuum pressure) or a powder gallbladder (which physically moves the powder in a mechanical manner).

[0026] In one embodiment, the conveying device may include a vacuum conveying motor or a powder gallbladder. A lip formed at the boundary of the hole of the upper electrode prevents powder from escaping downward through the hole, thereby minimizing powder loss and increasing the efficiency of the sorting process.

[0027] In one embodiment, a ledge may be formed at the boundary of a hole in the dielectric separation layer to prevent the dielectric powder separated above the dielectric separation layer from escaping below the dielectric separation layer through a hole in the dielectric separation layer.

[0028] In another aspect, the present invention provides a dielectric powder sorting method performed in a dielectric powder sorting device, comprising: placing dielectric powder on the dielectric substrate; applying an alternating voltage to the upper electrode and the lower electrode such that the electric field and alternating frequency are sufficient to induce vigorous flow of the dielectric powder while the holes of the dielectric separation layer are closed; and applying an alternating voltage to the upper electrode and the lower electrode such that the electric field and alternating frequency are sufficient to induce sorting flow of the dielectric powder while the holes of the dielectric separation layer are open.

[0029] This method, like the first type of dielectric powder separation device described earlier, begins by placing dielectric powder on a dielectric substrate and applying an alternating current voltage to form an electric field between an upper electrode and a lower electrode. At this time, the flow pattern of the dielectric powder can be controlled by adjusting the electric field strength and the length of the alternating current frequency between the two electrodes. Vigorous flow occurs with the dielectric separation layer closed, and the electric field strength and alternating current frequency are set so that most of the dielectric powder flows upward and at a high level. The electric field, determined by the gap between the electrodes and the voltage magnitude, controls the electrostatic force of the dielectric powder, while the alternating current frequency determines the length of the upward flow of the dielectric powder. This vigorous flow process disperses aggregation among dielectric powders or effectively mixes powders located in the lower layer that are unable to flow. Separation flow is performed with the holes in the dielectric separation layer open. By setting the electric field strength and alternating current frequency, only specific dielectric powders (e.g., light or small) are induced to pass through the dielectric separation layer. At this time, the combination of the hole size in the dielectric separation layer and the electric field allows light powders to selectively rise and move over the dielectric separation layer, enabling separation according to desired criteria.

[0030] In one embodiment, the process may include supplying a fluid containing polar molecules into the interior of the chamber to charge the dielectric powder. Supplying the fluid, which acts as a medium for flow, not only increases the fluidity of the powder and provides a stable separation environment, but also induces charges on the surface of the fluid or forms a film, thereby making flow and separation easier.

[0031] In one embodiment, the method may be characterized by applying a stronger electric field and a voltage of a longer frequency to deagglomerate the aggregated dielectric powder in the vigorous flow. By applying a stronger electric field and a voltage of a lower frequency in the vigorous flow, the aggregated dielectric powder is deagglomerated into individual particles. This increases the fluidity and separation efficiency of the powder and supports uniform mixing and subsequent processes.

[0032] In one embodiment, the vigorous flow may be characterized by being performed at a narrower gap than the spaced-apart gap between the upper electrode and the lower electrode in the sorting flow. By setting the gap between electrodes narrower than in the sorting flow, the vigorous flow strengthens the electric field strength and controls the flow state of the powder, thereby optimizing the process according to the sorting criteria.

[0033] In one embodiment, the vigorous flow and the screening flow can be repeated. By repeating the process of mixing small-sized dielectric powders from the lower layer to the upper layer with vigorous flow and separating them with screening flow, the precision and efficiency of the separation process can be maximized.

[0034] The dielectric powder sorting device according to the present invention provides a structure that not only enables rapid and precise sorting of dielectric powders based on their physical and electrical properties using an alternating electric field, but also prevents problems such as powder depletion or detachment during the sorting process. Furthermore, by efficiently implementing vigorous flow and sorting flow stages, the efficiency and reliability of powder sorting can be improved.

[0035] The dielectric powder separation method according to the present invention prevents powder aggregation through vigorous flow and precisely separates powder in the upper layer through separation flow, thereby providing the effect of efficiently separating powder according to particle size, shape, density, surface area, and dielectric constant. As a result, the separation time of powder is shortened, and the separation precision for fine particles can be greatly improved.

[0036] Figures 1a and 1b are schematic diagrams showing two aspects of a conventional dielectric powder sorting device.

[0037] FIG. 2a is a schematic diagram showing each configuration of a dielectric powder sorting device according to the present invention.

[0038] Figure 2b is a drawing showing a ledge formed along the edge of a hole formed in the upper electrode (dielectric separation layer).

[0039] FIGS. 3a to 3f are schematic diagrams showing the process of separating dielectric powder using a dielectric powder separation device according to the present invention, step by step.

[0040] Figure 4 is a diagram showing the effect on the vigorous movement of the dielectric powder according to the spacing between the upper electrode and the lower electrode.

[0041] FIG. 5 is a diagram showing the process of repeatedly performing vigorous movement and sorting movement of dielectric powder according to one embodiment of the present invention.

[0042] Figure 6 is a diagram showing the technical principle by which dielectric powder can be selected according to the characteristics of the dielectric powder.

[0043] Figure 7 is a diagram showing the difference in the flow range of dielectric powder according to the frequency of the applied AC voltage.

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. As the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing.

[0045] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to indicate the presence of the features, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, steps, actions, components, parts, or combinations thereof.

[0046] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0047]

[0048] The present invention is a technology based on prior registered patent No. 10-2725876 (hereinafter referred to as the "Prior Invention") devised by the inventor. The Prior Invention is a technology capable of rapidly and precisely sorting powders based on characteristics such as particle size, density, and dielectric constant using an alternating electric field. It overcomes the limitations of existing physical sorting methods and has demonstrated potential for application in various industries. In particular, the approach of controlling the fluidity of powders by adjusting voltage magnitude and frequency has been evaluated as a significant innovation compared to existing technologies.

[0049] The present invention was designed to advance the prior art into a more sophisticated and user-friendly technology. While based on AC high voltage technology like the prior art, it has been improved to efficiently utilize various powder characteristics by precisely designing the filter structure and the fluid composition.

[0050] In addition, to significantly enhance user convenience, device operation procedures have been simplified and an automated control system has been introduced. This moves away from the conventional method that relied on operator skill, thereby strengthening practicality so that anyone can efficiently operate the device in various work environments.

[0051] In conclusion, the present invention is a technology that presents new possibilities for application based on the technical achievements of the prior art. It satisfies precision, efficiency, and convenience in powder sorting operations and is expected to serve as a powerful tool for use in various industrial settings.

[0052] Before providing a detailed description of the present invention, we will briefly review the prior art registered patent No. 10-2725876. The dielectric powder sorting device of the prior art has a configuration similar to that shown in FIG. 1a and FIG. 1b, which will be named the first prior dielectric powder sorting device and the second prior dielectric powder sorting device, respectively.

[0053] First, the first dielectric powder sorting device shown in FIG. 1a is a dielectric powder sorting device having a structure in which dielectric powder (210) is placed between a lower electrode (230) and an upper electrode (220) having a hole formed therein. At this time, when voltage is applied to the upper electrode and the lower electrode, the dielectric powder (210) overcomes forces such as gravity and attraction and flows upward. Among the dielectric powders that flow upward, only the dielectric powders that satisfy specific criteria (particle size, density, dielectric constant, etc.) pass through the hole of the upper electrode and accumulate on the upper electrode, while the dielectric powders that do not satisfy the criteria cannot flow upward to the height of the upper electrode and fall to the lower electrode or dielectric substrate, thereby separating the dielectric powders.

[0054] By adjusting the electric field strength and frequency between the electrodes, the flow range varies according to the physical properties of the dielectric particles, such as size, density, and dielectric constant. Dielectric particles with a large flow range rise to the upper dielectric separation layer and are separated, while those with a small flow range fail to reach the height of the separation layer and accumulate on the dielectric substrate. This allows for the accurate separation of dielectric particles based on their characteristics.

[0055] In this device, the dielectric separation layer acts as a filter to separate powders exceeding a specific flow range, while the electric field strength and frequency serve as key factors determining flowability. It is characterized by a design that enables the effective separation of dielectric powders with various characteristics.

[0056] The second advanced dielectric powder sorting device shown in Fig. 1b has similarities to the first advanced dielectric powder sorting device in terms of technical principles and configuration. Both devices are identical in the method of charging dielectric powder by forming an alternating electric field between the upper electrode and the lower electrode, and sorting by adjusting the flow range according to the size, density, dielectric constant, etc. of the powder. In addition, they share commonalities in sorting powder according to the flow range by utilizing a dielectric substrate and a dielectric separation layer.

[0057] However, the second advanced dielectric particle sorting device differs in the arrangement of the upper electrode. Unlike FIG. 1a, FIG. 1b is characterized by the upper electrode being a single electrode and a perforated dielectric separation layer being positioned between the upper electrode and the lower electrode. That is, dielectric particles with a large flow range flow upward enough to pass through the holes of the dielectric separation layer and are sorted by the dielectric separation layer, while dielectric particles with a small flow range do not reach the dielectric separation layer and accumulate on the dielectric substrate. Through this, dielectric particles can be accurately sorted according to their characteristics.

[0058] The present invention proposes two devices and methods capable of efficiently sorting dielectric powders and automating the separation process by improving the first and second prior dielectric powder separation devices, respectively.

[0059] (1st Dielectric Powder Separation Device)

[0060] FIG. 2a shows the appearance of a device that can efficiently sort dielectric powder and automate the separation process by improving the first prior dielectric powder separation device.

[0061] The dielectric powder sorting device (100) shown in FIG. 2a includes an upright chamber having a dielectric substrate (110) disposed on an inner bottom surface, a lower electrode (120) formed at the bottom of the dielectric substrate, an upper electrode (130) located inside the chamber spaced apart from the lower electrode and having a plurality of holes (131) that can be opened and closed, and a voltage application means (140) that electrically connects the lower electrode and the upper electrode to apply an alternating voltage.

[0062] The dielectric powder sorting device according to the present invention is designed so that each component operates organically to efficiently sort dielectric powders. A dielectric substrate (110) is disposed on the inner bottom surface, which provides a surface on which dielectric powders (105) are placed. A lower electrode (120) is located at the bottom of the dielectric substrate (110) and serves to generate an alternating electric field together with the upper electrode.

[0063] The upper electrode (130) is positioned at the top of the chamber at a certain distance from the lower electrode and has a plurality of openable holes (131) formed therein. These holes (131) are designed so that only powders with specific fluidity among the dielectric powders affected by the electric field can pass through. The upper electrode (130) forms an alternating electric field together with the lower electrode, and the holes (131) act as filters to select the powders according to their characteristics.

[0064] The lower electrode and the upper electrode are electrically connected by a voltage application means (150) so that an alternating voltage is applied. This voltage application means (150) controls the charge state and flow characteristics of the dielectric powder (105) by adjusting the strength of the electric field by adjusting the magnitude and frequency of the voltage. Through this, the dielectric powder has different flow ranges depending on characteristics such as size, density, and dielectric constant according to the action of the electric field, and the powder with a large flow range passes through the hole of the upper electrode, while the powder with a small flow range remains on the dielectric substrate.

[0065] As a result, this device (100) can operate such that each component is organically linked to precisely sort dielectric powder (105) according to characteristics. The alternating electric field, voltage control, and the opening and closing of the holes of the upper electrode work in harmony to enable efficient sorting of dielectric powder.

[0066] In one embodiment, a fluid supply unit (150) for supplying a fluid containing a polar substance into the interior of the chamber may be further included. The fluid is injected into the interior of the chamber through the supply unit at a constant flow rate and pressure, and may be provided in a gaseous or liquid state. The fluid may be composed to contain polar or non-polar substances as needed and is supplied in a manner that uniformly fills the interior of the chamber. This fluid supply plays an important role in improving the fluidity of the powder and creating an environment that can respond more sensitively to an electric field.

[0067] The primary purpose of supplying the fluid is to promote surface charging of dielectric powder particles, thereby facilitating easier flow and responsiveness to electric fields. By enhancing the fluidity and responsiveness of the powder to electric fields, it can shorten process time and improve sorting accuracy, ultimately increasing overall process efficiency. In conclusion, the fluid supply unit can serve as a crucial element in the dielectric powder sorting process, enabling a process optimized for various working environments and powder characteristics by adjusting the fluid composition and supply method. This allows for the maximization of precision and efficiency in the sorting operation.

[0068] In one embodiment, the device may further include an opening / closing means (140) capable of opening and closing the hole (131) of the upper electrode. The opening / closing means capable of opening and closing the hole of the upper electrode is an important component that plays a key role in the dielectric powder sorting process. The opening / closing means in the first dielectric powder sorting device is a device designed to open or close multiple holes formed in the upper electrode as needed, and can be utilized to precisely control the sorting process according to the characteristics of the powder. The opening / closing means (140) can significantly improve the precision and efficiency of the sorting operation by restricting or allowing only powders with specific characteristics to pass through the hole while the dielectric powder flows within the electric field.

[0069] The opening / closing means (140) can open and close the hole in various ways, such as electrically or mechanically. For example, the hole can be opened and closed by sliding, or by manual means. An embodiment of the most preferred opening / closing means may be a plate having a protrusion formed therein that is movable in a vertical direction, wherein the protrusion is formed to correspond to the hole of the upper electrode and can open and close the hole of the upper electrode according to the vertical movement of the opening / closing means. The protrusion is designed to correspond exactly to the hole of the upper electrode, and the plate can open or close the hole (131) of the upper electrode while moving vertically through electrical or mechanical control.

[0070] This opening and closing mechanism offers high reliability while being structurally simple. The method utilizing plates and protrusions features a simple design, resulting in fewer breakdowns and easier maintenance. At the same time, the design ensures precise alignment between the protrusions and the holes, allowing for precise opening and closing of the holes. Consequently, it is possible to select only the desired powders under specific conditions and to flexibly handle the sorting of powders of various sizes and densities.

[0071] Furthermore, since the vertical movement of the plate can be operated in real-time in conjunction with an electrical control system, it can contribute to raising the level of process automation. Operators can automatically adjust the opening and closing status of the holes according to process conditions without intervention, thereby improving productivity and maximizing work efficiency. In addition, the movement of the plate and the opening and closing of the holes are organically linked with the electric field, allowing for the adjustment of the electric field's influence on the dielectric powder and more precise control of the powder sorting path.

[0072] In addition, the above-mentioned opening and closing means can provide the advantage of allowing the sorting process to be carried out in stages by closing or opening the hole of the upper electrode. When the hole is closed, the upper electrode is completely blocked, which enables the dielectric powder to flow vigorously inside the chamber. If vigorous flow is carried out while the upper electrode is open, not only powders with a large flow range but also powders with a small flow range may flow over the upper electrode, resulting in abnormal sorting. In this case, the sorting criteria become ambiguous, and it is difficult to accurately separate only powders with specific characteristics; therefore, it is desirable to adopt a configuration that allows the upper electrode to be closed in order to carry out vigorous flow.

[0073] Conversely, when the hole is open, the upper electrode is partially opened, allowing only powders with a large flow range to pass through the hole. This enables the precise separation of dielectric powders with specific characteristics during the selective flow stage. This opening and closing function of the hole controls the flow environment and allows the process to be performed by clearly distinguishing between the vigorous flow stage and the selective flow stage. If the hole of the upper electrode cannot be opened, it becomes impossible to separate dielectric powders with a large flow range to the upper electrode, which may make it impossible to achieve the technical objectives intended by the present invention.

[0074] Consequently, the method of opening and closing the hole in the upper electrode is highly advantageous for optimizing the sorting process at each stage, as it can efficiently separate the two stages of vigorous flow and sorting flow and provide environments tailored to their respective purposes. This can significantly improve the efficiency and precision of the sorting process.

[0075] In one embodiment, a transfer device having the function of transferring the separated dielectric powder over the upper electrode in a specific direction may be further included. This corresponds to a configuration for the continuity and efficiency of the sorting process. The transfer device can move the powder separated from the upper electrode quickly and accurately.

[0076] For example, the above-mentioned conveying device may include a vacuum conveying motor (170) or a powder gall (180). The vacuum conveying motor is suitable for processing fine and light powders by using vacuum pressure to suck up the powder and move it in a desired direction (171). It has the advantage of preventing the powder from leaking out or scattering and allowing for precise conveying without loss. On the other hand, the powder gall is designed in the form of a mechanical arm, blade, or broom and is advantageous for removing highly adhesive powders or residues by physically pushing and moving the powder remaining on the upper electrode.

[0077] The conveying device ensures process continuity and increases work speed by rapidly moving selected powders. Furthermore, it reduces waste by minimizing powder leakage or residue, and maximizes work efficiency in subsequent processes by transporting the powder to an accurate location. Designed to adapt to powders of various sizes and densities, those skilled in the art will be able to select the appropriate conveying method according to the characteristics of the powder and process requirements.

[0078] In one embodiment, a ridge is formed at the boundary of the hole of the upper electrode to prevent the dielectric powder separated above the upper electrode from escaping below the upper electrode through the hole of the upper electrode, as illustrated in FIG. 2B. If a ridge is not formed along the boundary of the hole of the upper electrode, the dielectric powder separated by the upper electrode may flow back down below the hole, causing problems such as the remixing or leakage of the already sorted dielectric powder. To prevent such problems, a ridge can be formed at the boundary of the hole of the upper electrode. This ridge forms a physical barrier around the hole of the upper electrode to effectively block the powder from flowing down through the hole, thereby preventing the powder from being remixed or leaking during the process. In conclusion, the ridge formed at the boundary of the hole of the upper electrode allows dielectric powder that bounces up due to sorting flow to be contained above the upper electrode, while preventing it from falling down through the hole; thus, the loss of powder can be minimized and the efficiency of the sorting process can be optimized.

[0079] The following relates to a method for separating dielectric powder using a dielectric powder separation device according to the first dielectric powder separation device. The dielectric powder separation method performed by the dielectric powder separation device according to the first dielectric powder separation device comprises three main steps.

[0080] The first step is to place dielectric powder on the dielectric substrate. It is desirable to ensure that the dielectric powder is evenly distributed on the surface of the substrate, thereby providing a basis for the electric field to act uniformly over the entire powder. In one embodiment, the first step may include the process of supplying a fluid into the chamber to charge the dielectric powder. FIG. 3a is a schematic diagram showing the supply of a fluid into the chamber. The purpose of this process is to increase the surface chargeability of the powder by injecting the fluid into the chamber and to create an environment where the dielectric powder can flow easily under the influence of an electric field.

[0081] The fluid flow can be provided in gaseous or liquid form and may contain polar liquid vapors such as water or alcohol; additionally, if the fluidity of specific powders needs to be reduced, non-polar vapors such as n-hexane may be used. The fluidity of the powders increases with the concentration of polar liquid vapors contained in the fluid flow, which can contribute to maximizing separation differentiation. In particular, since powders with polar surfaces exhibit good adsorption to polar vapors and powders with non-polar surfaces exhibit good adsorption to non-polar vapors, using both types of vapors together can further enhance the separation characteristics between polar and non-polar powders.

[0082] In addition, when the chamber is filled with a fluid while the hole of the upper electrode is closed, the fluid can be uniformly filled into the flow space inside the chamber. In this process, the hole of the upper electrode can be closed using an opening / closing means, and said opening / closing means may be a plate-shaped filter plug electrode with a protrusion formed to be movable in the vertical direction; other methods of blocking the filter hole other than the filter plug electrode may also be considered. For example, a method may be used in which an electrode with a filter hole and an electrode without a filter hole are provided separately and appropriately alternated according to the process stage.

[0083] Furthermore, when non-polar powders are flowed in a fluid containing polar vapor, an additional treatment can be applied to convert the surface of the non-polar powder into a polar surface. This lays the foundation for maximizing separation characteristics in subsequent stages.

[0084] In conclusion, the first stage is an important initial step that optimizes the flow space through the injection of fluid and the blocking of filter holes, and maximizes the fluidity and reactivity of the powder to enable efficient screening operations in the next stage.

[0085] The second step is to apply an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce vigorous flow of the dielectric powder while the hole of the upper electrode is closed. The vigorous flow process shown in FIG. 3b utilizes a high electric field and a long alternating frequency while the upper electrode is closed by an opening / closing means to collide with the aggregated powder, crushing and mixing it, thereby enabling the dielectric powder particles placed on the dielectric substrate to be remixed with one another.

[0086] At this stage, non-polar powders can undergo plasma hydrophilic treatment, which changes surface characteristics and maximizes separation efficiency in the next sorting stage. Consequently, the vigorous flow in the second stage is a process that vigorously flows the dielectric powders using the force of a strong electric field, eliminates aggregation between the powders, homogenizes the state of the powders through mixing and crushing, and mixes the dielectric powders placed on the dielectric substrate; this serves as a core process that prepares the powders for more efficient separation in the next sorting stage.

[0087] In one embodiment, the vigorous flow of the second stage may be characterized by being controlled by adjusting the spaced gap between the upper electrode and the lower electrode. For example, the upper electrode may be designed to be closer to the lower electrode in the vigorous flow stage than in the screening flow stage to increase the electric field strength and cause the flowing powder to flow vigorously. In the case of screening flow, since the electric field strength must be applied so that only dielectric powders meeting the screening criteria flow up to the height where the upper electrode is located, the electric field strength must be weaker than that of the vigorous flow stage, but an appropriate level of electric field strength must be applied. To cause vigorous flow of the powders, the gap of the electric field can be reduced and the electric field strength within the gap can be further strengthened by using a method of lowering the electrode with the blocked filter hole or raising the dielectric electrode. This can play an important role in maximizing the fluidity and reactivity of the powder.

[0088] The third step is to apply an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce selective flow of the dielectric powder while the hole of the upper electrode is open.

[0089] In the sorting flow step shown in Fig. 3c, a voltage lower than the AC voltage used in the second step must be applied. This is because only the flow powder that meets specific sorting criteria among the dielectric powders accumulated on the dielectric substrate must be flowed up to the height of the upper electrode.

[0090] When dielectric powder is deposited to a certain thickness on the dielectric electrode, small-sized fluid powder in the lower layer may be obstructed by large-sized fluid powder in the upper layer, making proper separation difficult. To solve this problem, the flow can be controlled to allow only the powder in the upper layer to flow. If the powder to be separated from the upper layer on the dielectric substrate is depleted due to sufficient separation flow, vigorous flow and separation flow can be repeatedly performed to additionally separate the remaining powder on the dielectric substrate. The repetitive operation can be carried out by mixing and dispersing the remaining powder again with vigorous flow, and then lowering the voltage intensity to separate the powder in the upper layer.

[0091] This step significantly improves screening accuracy and minimizes resource waste by efficiently processing residual powder through repetitive operations. In addition, the vigorous flow and screening flow are organically linked to homogenize the particle distribution within the powder layer and maintain the efficiency and consistency of the entire process. This process can be flexibly designed according to various powder characteristics and contribute to enhancing the precision and stability of the screening operation. This will be explained in more detail later through Fig. 5.

[0092] Subsequently, as an additional process, the dielectric powder collected on the upper electrode can be recovered while the application of the AC voltage is stopped. The process presented in FIG. 3d includes the process of terminating the application of the AC high voltage and recovering the powder collected on the filter electrode and the powder remaining on the dielectric electrode. This is the final step of the sorting process and aims to efficiently recover the separated powder so that it can be transferred to the next process or processed for reuse.

[0093] First, it is desirable to terminate the alternating high voltage used in the vigorous flow and screening flow to create a stable state where the powder is not affected by the electric field. This is to prevent instability that may occur during the powder recovery process. Afterward, the powder collected on the filter electrode is recovered using a vibrating powder conveying device (170) or a powder sweeping tool (180). As shown in FIG. 3e, the vibrating powder conveying device (170) operates by moving the powder using a vibrating motor and can quickly transfer the powder to a recovery container. Alternatively, as shown in FIG. 3f, a method of recovering the powder by pushing it in a specific direction using a tool such as a powder shovel (180) may also be used.

[0094] Residual powder remaining on the dielectric electrode can be thoroughly removed using additional recovery tools or, if necessary, prepared for the next process. By managing residual powder to prevent it from affecting the process, the stability and efficiency of the entire operation can be maintained. Furthermore, if powder recovery is required during the vigorous flow and screening flow stages, it can be recovered in real time without interrupting the process via vacuum pipes around the filter electrode or motor-based transfer systems. This allows for the maximization of the flexibility and operational efficiency of the continuous process.

[0095] Figure 4 illustrates a process of controlling the fluidity and reactivity of powder through the action of an electric field, and shows a method for efficiently carrying out the flow state and sorting process of powder through changes in the electric field strength. This process aims to control the surface charge of the powder by adjusting the position of the electrode and strengthening the electric field strength, and to selectively move specific powders.

[0096] First, the left side of Fig. 4 shows the step of lowering the lower electrode to increase the concentration of the electric field. As the lower electrode approaches the dielectric substrate, the gap of the electric field narrows, and as a result, the electric field is further strengthened. This can increase the surface charge of the powder, making the powder more sensitive to the electric field.

[0097] Next, the right side of Fig. 4 shows the flow of powder under a state where the electric field strength is enhanced. The enhanced electric field can resolve particle aggregation within the powder layer and cause the powder to flow strongly. In this process, the electric field strength and the flow range are directly related, and the precision of powder sorting can be improved by controlling the electric field strength through the setting of a spaced-apart distance between the lower electrode and the upper electrode.

[0098] In conclusion, FIG. 4 illustrates a method for precisely controlling the sorting process of powders by adjusting the position of the electrodes and strengthening the electric field strength. This allows for the enhancement of the surface charge of the powders, maximization of fluidity, and simultaneous improvement of sorting efficiency and accuracy. This process provides the flexibility to adjust the process according to various powder characteristics and can play an important role in enhancing the reliability and productivity of the sorting operation.

[0099] Figure 5 illustrates a process in which vigorous flow and screening flow are repeatedly performed to efficiently screen dielectric powder placed on a dielectric substrate and process residual powder.

[0100] First, in the selective flow stage, the upper layer of powder placed on the dielectric substrate is induced to flow by a low-intensity alternating electric field. During this process, only powder with a specific flow range moves through the holes of the upper electrode and is captured on the upper electrode. Through selective flow, the powder in the upper layer is gradually depleted, leaving the residual powder in the lower layer on the dielectric substrate.

[0101] Due to the selective flow, most of the powder in the upper layer is separated and depleted, while unseparated powder still remains in the lower layer. Therefore, since it is necessary to evenly mix the remaining powder in the lower layer into the upper layer for selective flow, the vigorous flow process can be repeated. In this stage, a high-intensity alternating electric field is applied to convert the remaining powder into a strong flow state. Vigorous flow can uniformly mix the remaining powder, eliminate aggregation, and rearrange the layers to prepare for the next selective flow to be carried out effectively.

[0102] Once this process is complete, the separation flow stage proceeds again. Vigorous flow and separation flow are repeated, gradually separating residual powder, and finally, all powder is separated or recovered. This repetitive process efficiently handles powder, reduces resource waste, and contributes to maximizing the accuracy of the separation process.

[0103] The number of repetitions for vigorous flow and screening flow may vary depending on the separation precision of the powder targeted in the screening process and the characteristics of the residual powder. The number of repetitions is determined by considering the degree of powder depletion in the upper layer and the distribution state of the powder remaining in the lower layer. Repetitions can be performed so that the residual powder is uniformly mixed into the upper layer and powder with a specific flow range can effectively move to the upper electrode. The repetition process can be adjusted according to process conditions such as the amount of residual powder, physical characteristics (size, density, dielectric constant, etc.), and electric field strength, and a person skilled in the art can appropriately select the necessary number of repetitions by taking these into consideration.

[0104] (2nd Dielectric Powder Separation Device)

[0105] The second dielectric powder sorting device may be a device capable of efficiently sorting dielectric powder and automating the separation process by improving the second prior dielectric powder separation device. For example, the present invention may include an upright chamber having a dielectric substrate disposed on an inner bottom surface, a lower electrode formed at the bottom of the dielectric substrate, an upper electrode disposed at the top spaced apart from the lower electrode within the chamber, a dielectric separation layer located between the lower electrode and the upper electrode within the chamber and having a plurality of holes formed therein that can be opened and closed, and a voltage application means for electrically connecting the lower electrode and the upper electrode to apply an alternating voltage.

[0106] The description of the second dielectric powder sorting device will focus on the differences from the first dielectric powder sorting device, and redundant explanations regarding overlapping content will be excluded. Any parts of the second dielectric powder sorting device that are not specified can be understood by referring to the contents of the first dielectric powder sorting device.

[0107] The second dielectric powder separation device is differentiated from the first dielectric powder separation device in that it separately introduces a dielectric separation layer configuration with multiple holes formed therein, rather than an upper electrode. The upper electrode does not need to have any holes formed therein. Therefore, the opening and closing means must be designed to correspond to the holes in the dielectric separation layer, rather than the upper electrode.

[0108] Accordingly, the device may further include an opening / closing means capable of opening and closing a hole in the dielectric separation layer, wherein the opening / closing means is a plate having a protrusion formed therein that is movable in a vertical direction, and the protrusion is formed to correspond to a hole in the dielectric separation layer so as to be able to open and close the hole in the dielectric separation layer according to the vertical movement of the opening / closing means.

[0109] In one embodiment, a transfer device capable of transferring the separated dielectric powder onto the dielectric separation layer in a specific direction may be additionally included. This transfer device utilizes a vacuum transfer motor or a powder gallbladder to effectively move the selected powder. In particular, since the selected dielectric powder accumulates on the dielectric separation layer rather than on the upper electrode, the transfer device must be designed to fit the dielectric separation layer. Through this, the powder accumulated on the dielectric separation layer can be moved accurately and efficiently in a specific direction.

[0110] In addition, since the selected dielectric powder is accumulated on the dielectric separation layer rather than the upper electrode, a ledge may be formed at the boundary of the holes in the dielectric separation layer to prevent the dielectric powder separated on the dielectric separation layer from escaping below the dielectric separation layer through the holes in the dielectric separation layer.

[0111] The dielectric powder sorting method performed in the second dielectric powder sorting device described above includes the process of placing dielectric powder on the dielectric substrate, applying an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce vigorous flow of the dielectric powder while the holes of the dielectric separation layer are closed, and applying an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce sorting flow of the dielectric powder while the holes of the dielectric separation layer are open.

[0112] Basically, the second dielectric powder sorting device is identical to the first dielectric powder sorting device in that dielectric powder is placed on a dielectric substrate; however, unlike the first dielectric powder sorting device, the sorted dielectric powder is separated into a dielectric separation layer rather than an upper electrode. Therefore, the second device involves a process of vigorous flow with the holes of the dielectric separation layer closed and sorting flow with the holes of the dielectric separation layer open. Additionally, since the sorted dielectric powder is captured in the dielectric separation layer, the transport device and recovery unit for recovering the dielectric powder must be designed to fit the dielectric separation layer.

[0113] (Technical principles of selective flow)

[0114] Figure 6 illustrates the process by which a dielectric powder placed on a dielectric electrode becomes fluid upon the application of an alternating current voltage. As an alternating current voltage is applied, the powder particles on the dielectric electrode are given polarity and become charged. When the fluid containing polar vapor is present, one or more conductive polar films are formed on the surface of the dielectric powder, causing the powder to have a net charge. The powder particles with a net charge are affected by an electric field and gain an upward force due to the interaction of the electric field within the fluid space. If this upward force is greater than the resultant force of the gravity of the powder particles and the attractive force between the dielectric and the dielectric, the powder particles enter a fluid state in which they move upward.

[0115] The fluidity of powder is influenced by several factors. First, inversely proportional to the weight and size of the powder particles, lighter particles exhibit fluidity more easily. Second, fluidity increases as the voltage increases, proportional to the magnitude of the applied AC voltage. Third, the surface area and shape of the powder particles affect fluidity; particles that are close to spherical have lower fluidity, while non-spherical particles (shapes with a large surface area) have higher fluidity. Fourth, in proportion to the degree of adsorption of polar vapor molecules onto the surface of the powder particles, particles with a high affinity for polar vapors exhibit higher fluidity. Finally, fluidity increases as the fluid contains more polar vapors, inversely proportional to the concentration of polar vapor molecules within the fluid.

[0116] In conclusion, Figure 6 visually explains the principle that dielectric powder has fluidity according to the interaction between the electric field and the flowing fluid and various sorting criteria, and shows the technical principle of a process that increases the sorting possibility of powder through fluidity control.

[0117] Figure 7 illustrates the process in which the flow range of powder particles on a dielectric electrode changes according to the frequency of the alternating current voltage. When a half-cycle of the alternating current voltage is applied at the high-voltage electrode, the powder particles begin to flow upward. At this time, the upward flow continues as long as the polarity of the voltage is maintained, but when the polarity of the voltage is reversed, the powder particles switch to a downward flow. Therefore, the frequency of the alternating current voltage is closely related to the flow range.

[0118] When the frequency of the AC voltage is high, the voltage polarity changes rapidly, shortening the rise duration of powder particles and consequently reducing the flow range. Conversely, when the frequency of the AC voltage is low, the cycle of voltage polarity change lengthens, extending the rise duration of powder particles and expanding the flow range. By utilizing these characteristics, sorting operations become possible based on the physical properties (size, density, dielectric constant, etc.) of the powder according to the difference in flow range.

[0119] In conclusion, FIG. 7 illustrates the core principle of a process that controls the flow range of powder by adjusting the frequency of the AC voltage and, based on this, can efficiently sort the powder. This can serve as an important factor in controlling the powder sorting process more precisely.

[0120]

[0121] The present invention proposes a technical configuration that enables efficient and precise sorting of dielectric powders and provides a device capable of simultaneously improving the automation and precision of the sorting process. Various embodiments of the present invention and the processes based thereon are designed to flexibly respond to the physical characteristics of dielectric powders and process conditions, and it is expected that this will serve as a technical foundation with high practicality and reliability that can be utilized in various industrial fields.

[0122] [Explanation of the symbol]

[0123] 100 Dielectric Powder Separator (1st Dielectric Powder Separator)

[0124] 105 Pre-selection genetic powder

[0125] 106 Violent Flow

[0126] 107 Selective Flow

[0127] 108 Selected Dielectric Powder

[0128] 110 Dielectric Substrate

[0129] 120 lower electrode

[0130] 130 upper electrode

[0131] 131 Multiple holes formed in the upper electrode

[0132] 140 opening and closing means

[0133] 150 voltage application means

[0134] 160 Fluid Supply Unit

[0135] 170 vacuum transfer motor

[0136] 171 Transported dielectric powder

[0137] 180 gallbladder

[0138] 190 Powder recovery bin

[0139] 191 Electrode plate around a plurality of holes formed in the upper electrode

[0140] 200 1st Preceding Dielectric Powder Separator

[0141] 210 Dielectric Split

[0142] 220 upper electrode

[0143] 230 lower electrode

[0144] 240 genomes

[0145] 300 Second Preceding Dielectric Powder Separator

[0146] 305 Dielectric Substrate

[0147] 310 Dielectric Split

[0148] 320 upper electrode

[0149] 330 lower electrode

[0150] 340 genome separation layer

[0151] Although the present invention has been described above with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. An upright chamber having a dielectric substrate disposed on its inner bottom surface; A lower electrode formed at the bottom of the above dielectric substrate; An upper electrode located inside the chamber spaced apart from the lower electrode at a certain distance, having a plurality of holes formed therein that can be opened and closed; and A voltage application means comprising electrically connecting the lower electrode and the upper electrode to apply an alternating current voltage, Dielectric powder sorting device.

2. In Paragraph 1, A fluid supply unit further comprising a fluid supply unit for supplying a fluid containing polar molecules into the interior of the chamber. Dielectric powder sorting device.

3. In Paragraph 1, A further comprising an opening / closing means capable of opening / closing the hole of the upper electrode, Dielectric powder sorting device.

4. In Paragraph 3, The above-mentioned opening and closing means is a plate having a protrusion formed therein that is movable in the vertical direction, The above protrusion is formed to correspond to the hole of the upper electrode, and is characterized in that the hole of the upper electrode can be opened or closed according to the vertical movement of the opening or closing means. Dielectric powder sorting device.

5. In Paragraph 1, A transfer device further comprising a function of transferring the separated dielectric powder over the upper electrode in a specific direction, Dielectric powder sorting device.

6. In Paragraph 5, The above transfer device includes a vacuum transfer motor or a powder gallbladder, Dielectric powder sorting device.

7. In Paragraph 1, A ledge is formed at the boundary of the hole of the upper electrode so as to prevent the dielectric powder separated above the upper electrode from escaping below the upper electrode through the hole of the upper electrode. Dielectric powder sorting device.

8. A method for separating dielectric powders performed in a dielectric powder separation device according to any one of claims 1 to 7, wherein A dielectric powder is placed on the above dielectric substrate; With the hole of the upper electrode closed, an alternating voltage is applied to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce vigorous flow of the dielectric powder; A method comprising applying an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce selective flow of the dielectric powder while the hole of the upper electrode is open. Dielectric powder screening method.

9. In Paragraph 8, A process comprising supplying a fluid containing polar molecules into the interior of the chamber to charge the dielectric powder, Dielectric powder screening method.

10. In Paragraph 8, Characterized by applying a stronger electric field and a voltage of a longer frequency to deaggregate the aggregated dielectric particles in the above violent flow. Dielectric powder screening method.

11. In Paragraph 8, The above vigorous flow is characterized by being performed at a narrower interval than the spaced-apart interval between the upper electrode and the lower electrode in the above screening flow. Dielectric powder screening method.

12. In Paragraph 8, Repeating the above vigorous flow and the above screening flow, Dielectric powder screening method.

13. An upright chamber having a dielectric substrate disposed on its inner bottom surface; A lower electrode formed at the bottom of the above dielectric substrate; An upper electrode positioned at the top, spaced apart from the lower electrode within the chamber; A dielectric separation layer located between the lower electrode and the upper electrode within the chamber and having a plurality of holes formed therein that can be opened and closed; and A voltage application means comprising electrically connecting the lower electrode and the upper electrode to apply an alternating current voltage, Dielectric powder sorting device.

14. In Paragraph 13, A fluid supply unit further comprising a fluid supply unit for supplying a fluid containing polar molecules into the interior of the chamber. Dielectric powder sorting device.

15. In Paragraph 13, A further comprising opening and closing means capable of opening and closing the holes of the above-mentioned dielectric separation layer, Dielectric powder sorting device.

16. In Paragraph 15, The above-mentioned opening and closing means is a plate having a protrusion formed therein that is movable in the vertical direction, The above protrusion is formed to correspond to the hole in the dielectric separation layer, and is characterized in that the hole in the dielectric separation layer can be opened or closed according to the vertical movement of the opening or closing means. Dielectric powder sorting device.

17. In Paragraph 13, A transfer device further comprising a function of transferring the separated dielectric powder over the dielectric separation layer in a specific direction, Dielectric powder sorting device.

18. In Paragraph 17, The above transfer device includes a vacuum transfer motor or a powder gallbladder, Dielectric powder sorting device. In Paragraph 19.13, A ledge is formed at the boundary of the hole in the dielectric separation layer so as to prevent the dielectric powder separated above the dielectric separation layer from escaping below the dielectric separation layer through the hole in the dielectric separation layer. Dielectric powder sorting device.

20. A method for separating dielectric powders performed in a dielectric powder separating device according to any one of claims 13 to 19, wherein A dielectric powder is placed on the above dielectric substrate; Applying an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce vigorous flow of the dielectric powder while the holes of the dielectric separation layer are closed; A method comprising applying an alternating voltage to the upper electrode and the lower electrode to have an electric field and an alternating frequency sufficient to induce selective flow of the dielectric powder while the holes of the dielectric separation layer are open. Dielectric powder screening method.

21. In Paragraph 20, A process comprising supplying a fluid containing polar molecules into the interior of the chamber to charge the dielectric powder, Dielectric powder screening method.

22. In Paragraph 20, Characterized by applying a stronger electric field and a voltage of a longer frequency to deaggregate the aggregated dielectric particles in the above violent flow. Dielectric powder screening method.

23. In Paragraph 20, The above vigorous flow is characterized by being performed at a narrower interval than the spaced-apart interval between the upper electrode and the lower electrode in the above screening flow. Dielectric powder screening method.

24. In Paragraph 20, Repeating the above vigorous flow and the above screening flow, Dielectric powder screening method.

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