JP6408861B2 - Electric dust collector and fryer integrated electrostatic dust collection unit - Google Patents

Description

  The present invention relates to an electrostatic precipitator and a fryer-integrated electrostatic precipitator unit that collect particles by charging particles such as oily smoke and oil dust in dust-containing air by corona discharge generated by applying a high voltage.

  Generally, when a fryer is used to cook food with oil, particles such as oil smoke and oil dust are generated. Therefore, conventionally, an electric dust collector that collects this kind of particles is provided above the fryer. Yes.

  Conventionally, for example, in Patent Document 1, a shielding plate having a width larger than the width in the upstream / downstream direction between discharge electrode plates arranged in parallel between two dust collecting electrodes arranged in the upstream / downstream direction of air. An invention of an electrostatic precipitator that aims to reduce the interference of discharge between adjacent discharge electrode plates and efficiently collect dust by arranging them is disclosed.

JP-A-9-173899

  However, in the invention disclosed in Patent Document 1 described above, a positive high voltage is applied to the dust collecting electrode plate and a negative high voltage is applied to the discharge electrode plate and the shielding plate. The charged particles cannot be collected because they are at the same potential as the plate. Therefore, there is a problem that the charged particles cannot be collected efficiently.

  The present invention has been made to solve the above-mentioned problems, and prevents discharge interference between adjacent discharge electrodes to increase discharge current (improve charging efficiency) and to efficiently charge charged particles. To provide an electrostatic precipitator and a flyer integrated electrostatic precipitator unit that can collect dust well (collect and adhere), and can maintain a stable grounding state and improve economy. It is the purpose.

  In order to solve the above-described problems, a first electrostatic precipitator according to the present invention is an electric precipitator for collecting particles by charging particles in the dusty air by corona discharge generated by application of a high voltage. A ground electrode plate having a large number of openings that allow the passage of dust-containing air and a downstream side of the ground electrode plate in the flow direction of the dust-containing air, corresponding to the openings. A plurality of discharge electrodes, and arranged downstream from the ground electrode plate in a direction in which the dust-containing air flows in a direction that does not block the flow of the dust-containing air. A plurality of support substrates that support the base end portion of the discharge electrode so as to maintain a predetermined distance from the peripheral edge of the opening, and the support substrate is disposed between the support substrates so as to face the support substrate. An earth plate, and the discharge electrode Plus or minus high voltage is applied, the ground plate and the ground electrode plate is characterized in that it is grounded.

  According to the first electrostatic precipitator of the present invention, interference of the electric field between adjacent discharge electrodes can be prevented by the ground plate. Therefore, it is possible to reliably obtain a discharge current necessary for charging particles in the dust-containing air between the discharge electrode and the opening of the ground electrode plate, and to reduce the load on the dust collecting plate. Therefore, the collection efficiency of the entire electric dust collector can be improved. Further, by increasing the discharge current, particles having a small particle diameter can be charged and collected (collected). Furthermore, by preventing the interference of the electric field between the adjacent discharge electrodes, the distance between the discharge electrodes can be reduced, and the electric dust collector can be downsized.

  In the second electrostatic precipitator of the present invention, the support substrate and the ground plate are alternately arranged at a predetermined interval.

  According to the second electrostatic precipitator of the present invention, a stable electric field can always be generated between the support substrate and the ground plate. Further, since the structure is simple, it can be manufactured at low cost, and the economy can be improved.

  In the third electrostatic precipitator of the present invention, the distance from the tip of the discharge electrode to the peripheral edge of the opening corresponding to the discharge electrode is from the tip of the discharge electrode to the discharge. It is provided so that it may become shorter than the distance to the edge part of the said earth | ground plate nearest to an electrode.

  According to the third electrostatic precipitator of the present invention, discharge between the tip of the discharge electrode and the end of the ground plate is prevented, and the tip of the discharge electrode and the opening corresponding to the discharge electrode A discharge area can be reliably generated.

  In the fourth electrostatic precipitator of the present invention, the ground electrode plate is formed with a protrusion protruding downstream in the flow direction of the dust-containing air without penetrating the ground electrode plate. A hole having a grounding part disposed between the support substrates and a fixing part fixed to the ground electrode plate, and the fixing part having a hole in which the protruding part can be fitted at a position corresponding to the protruding part. A portion is formed.

  According to the fourth electrostatic precipitator of the present invention, the ground plate can be reliably positioned and fixed at a predetermined position of the ground electrode plate by fitting the protruding portion into the hole. Moreover, since the protrusion does not penetrate the ground electrode plate, the air flow of the dust-containing air is not affected.

  In the fifth electrostatic precipitator of the present invention, the ground plate is fixed to the ground electrode plate by spot-welding the projection portion of the ground electrode plate fitted into the hole of the ground plate. Features.

  According to the fifth electric dust collector of the present invention, the ground plate can be reliably fixed to the ground electrode plate, and the ground plate can be at the same potential (ground) as the ground electrode plate. In addition, spot welding is a joining method with less distortion and a relatively low cost joining method, so that the influence on the ground electrode plate can be suppressed and economic efficiency can be improved.

  In the sixth electric dust collector of the present invention, the ground portion of the ground plate is parallel to face each other by folding one plate material on both sides of the fixed portion to the downstream side in the flow direction of the dust-containing air. It is formed in this.

  According to the sixth electrostatic precipitator of the present invention, two rows of ground portions can be formed with one ground plate, so that the number of parts can be reduced and the cost can be reduced.

  In the seventh electric dust collector of the present invention, the ground portion of the ground plate is formed so as to protrude from the support substrate to the downstream side in the flow direction of the dust-containing air.

  According to the seventh electric dust collector of the present invention, the charged particles can be easily attached (collected) to the ground portion, so that the load on the dust collecting plate can be reduced. In addition, a discharge area is formed between the downstream end of the discharge electrode and the downstream end of the ground portion, and the distance between the downstream end of the discharge electrode and the downstream end of the ground portion is increased. Thus, the influence on the discharge between the tip of the discharge electrode and the opening of the ground electrode plate can be suppressed to a slight level. Therefore, if there are particles that are not charged upstream in the flow direction of the dust-containing air, the particles can be charged in the discharge area on the downstream side, thereby improving the charging efficiency of the entire electrostatic precipitator. be able to. Furthermore, since the grounding portion is formed so as to protrude downstream from the support substrate, the distance between the grounding portion and the dust collecting plate can be shortened. The airflow can be smoothly flowed, and the rectification function can be enhanced.

  In the eighth electric dust collector of the present invention, the discharge electrode is made of Inconel (registered trademark) and has a truncated cone shape at the tip.

  According to the eighth electrostatic precipitator of the present invention, the tip portion of the discharge electrode is formed into a truncated cone shape, so that the discharge time elapses as in the case where the tip portion of the discharge electrode is formed into a needle shape. The discharge performance can be stabilized without causing a problem that the discharge performance is not stabilized due to gradual wear from the pointed end. Moreover, since the front-end | tip part of the electrode for discharge is not sharp, safety | security can be improved. Furthermore, as compared with the case where the tip of the discharge electrode is formed in a needle shape, the tip diameter does not need to be polished more accurately than necessary, so that it can be manufactured at low cost. Furthermore, by using Inconel as the material for the discharge electrode, it is possible to suppress the occurrence of oxidative deterioration due to corona discharge, and to improve durability and discharge performance. Moreover, since Inconel is inexpensive, it can improve economy.

  In the ninth electrostatic precipitator of the present invention, the end of the discharge electrode on the downstream side in the flow direction of the dust-containing air and the end of the support substrate on the downstream side in the flow direction of the dust-containing air are the same surface. It is arranged above.

  According to the ninth electric dust collector of the present invention, the discharge becomes stronger than necessary between the ground plate and the downstream end of the discharge electrode protruding from the support substrate. As a result, the discharge between the discharge electrode and the opening of the ground electrode plate becomes weak, or the downstream end of the discharge electrode is retracted from the support substrate, and the downstream side of the ground plate. The discharge area cannot be generated between the end portions and the discharge area is not generated only on one side. That is, according to the ninth electrostatic precipitator of the present invention, a discharge area can be generated in a well-balanced manner between the downstream end of the discharge electrode and the ground plates on both sides of the discharge electrode. Can be generated.

  In a tenth electric dust collector of the present invention, a plurality of dust collecting plates arranged in parallel on the downstream side in the flow direction of the dust-containing air from the discharge electrode, and the dust collecting plates face each other between the dust collecting plates. And a high voltage electrode plate disposed further, wherein the dust collecting plate, the ground plate, and the support substrate are provided separately.

  According to the tenth electric dust collector of the present invention, the number of dust collecting plates can be increased without being constrained by the arrangement of the ground plate and the support substrate, so that the collection performance can be improved, Durability can also be improved. In addition, since the discharge electrode and the high voltage plate can be charged separately, the high voltage level can be adjusted according to the properties of the collection target. Furthermore, since only the discharge electrode can be replaced, the economy can be improved.

  In an eleventh electric dust collector of the present invention, a plurality of dust collecting plates arranged side by side downstream of the discharge electrode in the flow direction of the dust-containing air, and the dust collecting plates are opposed to each other between the dust collecting plates. And a high-voltage electrode plate disposed in a plurality of locations, wherein the dust collecting plate and the ground plate are integrated.

  According to the eleventh electric dust collector of the present invention, by integrating the dust collecting plate and the ground plate, it is possible to reduce the size, the number of parts, and the cost.

  In a twelfth electric dust collector of the present invention, the discharge electrode and the support substrate are integrated.

  According to the twelfth electric dust collector of the present invention, by integrating the discharge electrode and the support substrate, it is possible to reduce the size, the number of parts, and the cost.

  A fryer-integrated electric dust collecting unit of the present invention includes an oil tank for storing oil for frying food, and a lifter that operates to raise and lower a basket for storing food to be taken in and out of the oil tank, A suction port, a prefilter, a fan, an exhaust port, and the above-described electrostatic precipitator disposed between the fan and the exhaust port, which are sequentially arranged from the downstream side in the flow direction of particles generated from the fryer above the fryer. Are provided in a common housing.

  According to the flyer-integrated electric dust collection unit of the present invention, by arranging the electric dust collector in the common housing at the upper part of the fryer, it is possible to efficiently and reliably collect particles generated from the fly operation, The entire apparatus can be configured in a compact manner. Further, in the fryer, since it is possible to preliminarily estimate the properties of oil and the generation amount of particles such as oil smoke, the particles can be efficiently and reliably collected by the electric dust collector.

  According to the present invention, it is possible to prevent discharge interference between adjacent discharge electrode plates, improve the charging efficiency, and efficiently collect charged particles. Furthermore, various excellent effects can be obtained, such as being able to stably maintain a grounding state and improve economy.

It is a side view which shows the inside of the fryer integrated electric dust collection unit which concerns on embodiment of this invention. It is a perspective view which shows the charge dust collection part of the electric dust collector which concerns on embodiment of this invention. It is a perspective view which shows the inside of the charge dust collection part of the electric dust collector which concerns on embodiment of this invention. It is the figure which looked at Drawing 3 from the upper part (a dust collection part is omitted). It is the figure which looked at FIG. 4 from the arrow A direction. It is the figure which looked at FIG. 4 from the arrow B direction. It is the figure which expanded the C section of FIG. It is a perspective view which shows the ground electrode plate and ground plate of the charge dust collection part of the electric dust collector which concerns on embodiment of this invention. It is sectional drawing which shows the charge dust collection part of the electric dust collector which concerns on embodiment of this invention. It is sectional drawing which shows the modification of the charge dust collection part of the electric dust collector which concerns on embodiment of this invention. It is sectional drawing which shows another modification of the charge dust collection part of the electric dust collector which concerns on embodiment of this invention. It is the figure which looked at the electrode for discharge from the arrow D direction in the modification of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, an overall configuration of a fryer integrated electrostatic dust collecting unit according to an embodiment of the present invention will be described with reference to FIG. Here, FIG. 1 is a side view showing the inside of the fryer integrated electrostatic dust collecting unit according to the embodiment of the present invention.

  A fryer-integrated electric dust collection unit 10 according to an embodiment of the present invention includes a fryer 12 and an electric dust collector 13 provided in a vertically long box-shaped casing 11, and is configured integrally. A rectangular opening 14 is formed substantially at the center of the front surface of the housing 11, and a horizontally long rectangular exhaust port 15 is formed at the top so as to open forward.

  The flyer 12 is attached to the lower part of the housing 11. The fryer 12 is mainly composed of an oil tank 16 for storing oil for frying the food, and an elevating equipment 18 that operates to move the basket 17 for storing the food up and down and put it in and out of the oil tank 16.

  In addition, a fryer means the cooking device which cooks fry (fried food). In addition, frying refers to a cooking method that uses a relatively large amount of fats and oils such as fried food, fried chicken, tempura, and fried food as a heat medium, and the types, forms, materials, etc. of the ingredients are particularly limited. is not. For example, croquettes, pork cutlet, fried pork cutlet, fried seafood, fried seafood, fried meat, fried vegetables, fried oysters, tempura, ham cutlet, french fries, fried meat dumplings, pre-fried type Tempura, deep-fried rice crackers (fried rice crackers, etc.), deep-fried snacks, deep-fried snacks, deep-fried sweet potatoes, American dogs, curry bread, piroshki, spring rolls, etc. are included. Moreover, the cooking time and the temperature of the oil tank 16 can be appropriately adjusted according to the type and number of ingredients, and by appropriately managing the frying oil, the fried cooking product is fragrant and not oily. Flavors such as being crisp can be maintained. In addition, it is known that suppressing the amount of deteriorated product in frying oil contributes to a positive influence on the flavor of the fried cooked product.

  The basket 17 of the flyer 12 is made of, for example, a metal such as stainless steel, the entire circumferential side surface and bottom surface are formed in a mesh shape, and the upper side is opened. A handle portion 21 is formed to extend forward at the front portion of the basket 17, and a hook portion (not shown) is formed at the rear portion of the basket 17.

  The elevating equipment 18 includes a support column 22 erected on the rear side of the oil tank 16, an arm unit 23 that can be moved up and down along the support column 22, and a motor (not shown) that is a drive source for moving the arm unit 23 up and down. And is configured. The arm portion 23 is formed to extend forward from the column portion 22, and the front end portion of the arm portion 23 is formed so that the hook portion of the basket 17 can be engaged and disengaged. Accordingly, when the hook portion of the basket 17 is locked to the front end portion of the arm portion 23, the basket 17 is held in a horizontal posture so that the grip portion 21 protrudes forward from the front surface of the housing 11 through the opening 14. It has become.

  The electric dust collector 13 is attached to the upper part of the housing 11 and above the fryer 12. The electric dust collector 13 includes a pretreatment unit 24, a fan 25, a charged dust collection unit 40, and an exhaust gas, which are arranged in order from the downstream side along the flow direction of oil smoke generated from the fryer 12 (see the arrow in FIG. 1). An electric dust collector control device 26 attached to the front surface of the housing 11 just below the mouth 15.

  The pre-processing unit 24 is provided at the rear part of the housing 11, for example, an inclined surface 26 formed by inclining a metal plate such as stainless steel downward, a bottom surface 27 formed horizontally rearward from the lower end of the inclined surface 26, and the housing. 11 to form a rear chamber chamber 28. A suction port 29 is formed in the inclined surface 26, and a prefilter 30 is detachably provided at a position corresponding to the suction port 29. As the pre-filter 30, for example, a mesh filter, a stainless steel grease filter, or the like can be used.

  A metal partition plate 31 is attached in a horizontal posture above the pretreatment unit 24, and a fan 25 is attached to the upper rear portion of the partition plate 31. The fan 25 is, for example, a sirocco fan, and the fan motor 32 is disposed at the top, and is installed so that air can be sucked from below and discharged forward.

  A front chamber chamber 33 is formed in front of the upper portion of the partition plate 31 and in front of the fan 25. The charged dust collector is disposed in front of the front chamber chamber 33 and behind the controller 26 for the electrostatic precipitator. 40 is attached. The charged dust collection unit 40 collects particles such as oil smoke by charging with corona discharge generated by application of a high voltage, and is installed so that air can be sucked from below and discharged upward. The details of the charged dust collection unit 40 will be described later.

  The electric dust collector control device 26 is detachably fixed to the housing 11 by screwing. Therefore, when removing the charged dust collection part 40, after removing the control apparatus 26 for electric dust collectors, it carries out by pulling out the charged dust collection part 40 from the inside of the housing | casing 11 to the near side. On the other hand, when the electric dust collector control device 26 is mounted, the electric dust collector control device 26 is removed and the charged dust collector 40 is accommodated in the housing 11, and then the electric dust collector control device 26 is installed in the housing 11. Secure with screws.

  Next, the charged dust collector 40 of the electrostatic precipitator 13 will be described in detail with reference mainly to FIGS. 2 is a perspective view showing the charged dust collecting unit 40, FIG. 3 is a perspective view showing the inside of the charged dust collecting unit 40, and FIG. 4 is a view of FIG. 3 as viewed from above (the dust collecting unit is omitted). 5 is a view of FIG. 4 viewed from the direction of arrow A, FIG. 6 is a view of FIG. 4 viewed from the direction of arrow B, FIG. 7 is an enlarged view of portion C of FIG. FIG. 9 is a cross-sectional view showing the charged dust collecting portion 40. FIG. In the following description, the vertical and horizontal directions are based on the direction in which the charged dust collection unit 40 is actually installed in the housing 11 of the fryer-integrated electric dust collection unit 10.

  The charged dust collecting portion 40 has a substantially rectangular parallelepiped shape, and is formed such that the height dimension is smaller than the depth dimension in the front-rear direction and the width dimension in the left-right direction. The charged dust collection unit 40 is arranged in parallel in a frame 41 that forms the entire framework, a ground electrode plate 42 that is attached to the lower surface of the frame 41, and a direction above the ground electrode plate 42 and perpendicular to the ground electrode plate 42. A plurality of support substrates 43, a discharge electrode 44 that is cantilevered and supported by the support substrate 43 downward, and a ground plate 45 that is disposed between the support substrates 43 so as to face the support substrate 43. The plurality of dust collecting plates 46 arranged in parallel to the ground electrode plate 42 above the support substrate 43 and the ground plate 45 and the dust collecting plates 46 are disposed so as to face the dust collecting plates 46. A plurality of high voltage electrode plates 47.

  The frame body 41 includes front and rear end plates 48 and 49 provided so as to face each other, and six connection shafts 50 that are provided between the front and rear end plates 48 and 49 in a horizontal posture. Of the six connecting shafts 50, two support the left and right ends of the support substrate 43, the other two support the left and right ends of the dust collecting plate 46, and the other two are high-voltage plates. The left and right ends of 47 are supported. A pair of upper and lower power supply members 51 are attached to the front end portion of the connecting shaft 50, and between each power supply member 51 and the front end plate 48, a total of eight insulators 52 (four on the front side and four on the rear side). ) Intervened.

  A high voltage power supply unit 53 is electrically connected to each power supply member 51. As shown in FIG. 2, the high voltage power supply unit 53 boosts the alternating current source 54 with a high voltage transformer 55, converts the alternating current into direct current with the voltage doubler 56, and further boosts the high voltage And functions as an output control unit for controlling the output of the high voltage applied to the charged dust collecting unit 40.

  The ground electrode plate 42 is formed in a flat plate shape from a single rectangular conductive metal (for example, iron) in which a large number of round hole-shaped openings 57 are formed, and is grounded. The ground electrode body 42 is detachably attached to the lower surface of the frame body 41 in a direction in which the air flow is blocked by a detachable means such as a detachable rivet (a direction orthogonal to the air flow direction). The openings 57 are arranged at regular intervals, aligned in the front-rear and left-right directions like a grid. In the present embodiment, the opening portions 57 are provided in the left and right 12 rows × front and rear 11 rows = 132 pieces, and the inner diameter of each opening portion 57 is set to 13 mm.

  The support substrate 43 is formed of a plate material made of a metal (for example, aluminum) having an elongated strip shape and conductivity. A U-shaped groove portion 58 is formed at the left end portion of the support substrate 43, and a semicircular groove portion 59 is formed at the right end portion, and the U-shaped groove portion 58 and the semicircular groove portion 59 are respectively provided. The connecting shaft 50 is engaged. On the connection shaft 50 corresponding to the U-shaped groove 58, grooves that can be engaged with the U-shaped groove 58 are processed in parallel at equal intervals. A plurality of spacers 60 are provided around the connecting shaft 50 corresponding to the semicircular groove 59, and the supporting substrates 43 are fixed and held in parallel at equal intervals by the pressing force of these spacers 60. Yes. With this configuration, when the support substrate 43 is slid to the left by weakening the tightening force of the right connecting shaft 50, the engagement between the semicircular groove 58 and the connecting shaft 50 is released. The support substrate 43 can be easily detached from the charged dust collection unit 40 by rotating the support substrate 43 downward and pulling it away from the connecting shaft 50. In addition, when attaching the support substrate 43 to the charge dust collection part 40, it can carry out in the reverse procedure to the procedure described above.

  In this embodiment, the support substrates 43 are provided in 11 rows corresponding to the arrangement of the opening portions 57 in the front-rear direction, and are arranged so as to pass near the center of the opening portions 57. Each support substrate 43 is formed with a number of crimping portions 61 corresponding to the number of openings 57 in one row in the left-right direction (12 in this embodiment). The base end portion 44a of the discharge electrode 44 is cantilevered.

  The discharge electrode 44 is held in a posture in which the tip end portion 44a faces downward from the crimping portion 61, and a positive or negative high voltage is applied. The distal end portion 44 a of the discharge electrode 44 is disposed so as to be positioned on the center line CL (see FIG. 9) of the opening 57 of the ground electrode plate 42, and is spaced from the peripheral portion of the opening 57. To maintain.

  The tip 44a of the discharge electrode 44 has a truncated cone shape, and the portion other than the tip 44a has a thin cylindrical shape. In the present embodiment, the discharge electrode 44 is formed in a needle shape having a diameter of 0.5 mm to 0.6 mm and a length of 22 mm. The lower end surface of the distal end portion 44a (conical trapezoidal shape) of the discharge electrode 44 is circular with a diameter of 0.12 mm, and the sandwiching angle (inclination angle) of the distal end portion 44a is 25 ° to 30 °. Further, the base end portion (end portion on the downstream side of the dust-containing air flow) 44b of the discharge electrode 44 and the base end portion (end portion on the downstream side in the flow direction of the dust-containing air) 43b of the support substrate 43 are the same. It is arranged on the surface. And when manufacturing such an electrode 44 for discharge, after cutting a linear raw material into predetermined length, the front-end | tip part 44a is grind | polished so that there may be no burr | flash, and it forms in a truncated cone shape. The tip end portion 44a of the discharge electrode 44 may be formed into a truncated cone shape by rolling, instead of the above-described polishing process.

  In this embodiment, the material of the discharge electrode 44 is preferably Inconel (registered trademark) X750, and the specific composition ratios thereof are Ni + Co = 74%, Cr = 15%, Fe = 7%, Ti = 2. .25 to 2.75%, Al = 0.4 to 1.0%, and Nb + Ta = 0.7 to 1.2%. By configuring the discharge electrode 44 in this way, the amount of ozone generated can be remarkably reduced, the workability is excellent, stable discharge is possible, the amount of wear of the discharge electrode 44 is suppressed, and a long life is achieved. Can be achieved. In particular, since the discharge electrode 44 made of Inconel (registered trademark) X750 is more resistant to oxidation and deterioration in corona discharge than other materials (for example, tungsten), stable discharge performance can be maintained.

  The ground plate 45 is formed by bending the edges on both sides of one conductive metal plate (for example, an iron plate) upward (downstream in the direction in which dust-containing air flows), and is grounded. The ground plate 45 includes a fixed portion 62 fixed to the upper surface of the ground electrode plate 42 at both left and right ends, and a pair of two ground wires formed between the left and right fixed portions 62 so as to be opposed to each other. Part 63.

  Each fixing portion 62 has a rectangular flat plate shape along the upper surface of the ground electrode plate 42, and has a small circular hole portion 64. A protruding portion 65 is formed at a position corresponding to the hole portion 64 of each fixing portion 62 so as to protrude upward by half punching, and the protruding portion 65 is formed so as to be able to fit into the hole portion 64. . Each fixing portion 62 is fixed to the ground electrode plate 42 by fitting the projection 65 into the hole 64 and spot welding. As described above, the ground plate 45 can be reliably fixed to the ground electrode plate 42 by spot welding, and can have the same potential (ground) as the ground electrode plate 42. In addition, spot welding is a joining method with less distortion and a relatively low cost joining method, so that the influence on the ground electrode plate 42 can be suppressed and economic efficiency can be improved. . Furthermore, since the protrusion 65 is formed by half-punching on the ground electrode plate 42 side and no opening is formed in the ground electrode plate 42, the air flow of dust-containing air is not affected.

  Each ground portion 63 has an elongated plate shape, and is disposed between the support substrates 43 so that the ground portions 63 on both sides are at an equal distance from the center position of the discharge electrode 44. A distance L1 (see FIG. 9) from the distal end portion 44a of the discharge electrode 44 to the peripheral edge portion of the opening 57 corresponding to the discharge electrode 44 is a distance from the discharge electrode 44 to the lower end portion 63a of the grounding portion 63 closest to the discharge electrode 44. It is set to be shorter than L2 (see FIG. 9). In this embodiment, L1 is set to 11.8 mm, and L2 is set to 12.2 mm. In addition, the upper end portion of each ground portion 63 is formed so as to protrude above the upper end portion of the support substrate 43 (downstream in the direction in which the dust-containing air flows). In the present embodiment, the length L3 (see FIG. 9) of each ground portion 63 projecting upward from the support substrate 43 is set to 6 mm.

  As described above, since the ground portions 63 for two rows can be formed by the single ground plate 45, the number of parts can be reduced and the cost can be reduced. Further, by forming the upper end portion of the ground portion 63 so as to protrude above the upper end portion of the support substrate 43, it becomes easy to attach (collect) charged particles to the ground portion 63. The load on the dust collecting plate 46 disposed on the downstream side in the distribution direction can be reduced, and the total collection efficiency can be improved. In addition, since the ground portion 63 is formed so as to protrude downstream from the support substrate 43, the distance between the ground portion 63 and the dust collecting plate 46 can be shortened, so that the dust collection downstream of the ground portion 63 is performed. The air flow of dust-containing air can flow smoothly through the plate 46, and the rectification function can be enhanced.

  The dust collecting plate 46 is grounded, and the lower end 46 a of the dust collecting plate 46 extends from the upper end portion 43 b of the support substrate 43 and the upper end portion 63 b of the ground portion 63 on the upper extension line of the support substrate 43 and the upper extension line of the ground portion 63. They are spaced apart by a predetermined distance. The connecting shafts 50 pass through the left and right ends of the dust collecting plates 46, and the dust collecting plates 46 are held in parallel at equal intervals.

  The high voltage electrode plate 47 is disposed between the dust collecting plates 46 such that a lower end portion 47a of the dust collecting plate 46 recedes a predetermined distance above the lower end portion 46a of the dust collecting plate 46. The connecting shaft 50 penetrates the left and right ends of the high voltage electrode plate 47, and the high voltage electrode plates 47 are held in parallel at equal intervals.

  In the charged dust collecting section 40 according to the above-described embodiment of the present invention, as shown in FIG. 9, the charging section (the ground electrode plate 42, the support substrate 43, the discharge electrode 44, and the ground plate 45) and the collector are collected. Although the structure which the dust part (dust collecting plate 46 and the high voltage electrode plate 47) isolate | separated is employ | adopted, this invention is not necessarily limited to this form. For example, the dust collecting plate 46 of the dust collecting unit does not necessarily have to be disposed on the extended line of the support substrate 43 of the charging unit, and may be displaced in the front-rear direction (left-right direction in FIG. 9).

  Further, as shown in FIG. 10, the ground plate 45 and the dust collecting plate 46 are integrated, and the support substrate 43 and the dust collecting plate 46 (or the high voltage electrode plate 47) are integrated so that only the discharge electrode 44 is high. As shown in FIGS. 11 and 12, the ground plate 45 and the dust collecting plate 46 (or the high voltage electrode plate 47) are integrated, and the discharge electrode 44, the support substrate 43, and the dust collecting are applied. The plate 46 may be integrated and a high voltage may be applied only to the discharge electrode 44.

  As shown in FIG. 9, when the charged part and the dust collecting part are separated, the charged part and the dust collecting part are integrated as shown in FIGS. 10 to 12. Since the number of the dust collecting plates 46 of the dust collecting part can be increased, the collection performance can be improved and the durability can be improved. Moreover, since the charging part and the dust collecting part can be charged separately, the high voltage level can be adjusted according to the properties of the collection target. Furthermore, since only the discharge electrode 44 can be replaced, the economy can be improved.

Next, with reference to FIGS. 1-9, a description of the operation of the fryer integrated electric dust collection unit 10 according to the embodiment of the present invention described above.

  First, in a state where new oil is stored in the oil tank 16, the basket 17 is raised to the standby position above the oil tank 16 by the lifting equipment 18 when the fryer 12 is not used. In the standby position, the oil temperature in the oil tank 16 is maintained at a predetermined low temperature (for example, 140 ° C.) in the fryer 12, and the high voltage from the high voltage power supply unit 53 to the charged dust collection unit 40 is maintained in the electric dust collector 13. No application is performed, and the fan 25 is maintained in the off state.

  When ingredients to be cooked are put into the basket 17 and the fryer 12 is turned on, the lifting equipment 18 lowers the basket 17 to the cooking position in the oil tank 16. In this cooking position, in the fryer 12, the oil temperature in the oil tank 16 is maintained at a predetermined high temperature (for example, 180 ° C.), whereby the food is cooked with high-temperature oil. Etc. are generated.

  On the other hand, at this time, in the electric dust collector 13, the high voltage HV (for example, −8 KV) is applied from the high voltage power supply unit 53 to the charged dust collection unit 40, and the fan 25 is operated in the high rotation mode. As a result, the dust-containing air containing the particles rises due to the suction force of the fan 25, passes through the prefilter 30 from the suction port 29, and after removing coarse particles, passes through the fan 25 from the rear chamber chamber 28, Flows into the charged dust collection unit 40 from the partial chamber chamber 33.

  In the charged dust collection unit 40, a high voltage HV is applied to the discharge electrode 44 from the high voltage power supply unit 53 through the power supply member 51, and the tip 44 a of the discharge electrode 44 and the ground electrode are generated by corona discharge generated thereby. A clean parabolic conical charging area EA is formed between the entire peripheral edge of the opening 57 of the plate 42. On the other hand, a high voltage LV (for example, −6 KV) is applied to the high voltage electrode plate 47 through the power supply member 51 from the high voltage power supply unit 53.

  As shown in FIGS. 7 and 9, when the dust-containing air passes through the thus formed charging area EA, particles such as oil smoke and oil dust in the dust-containing air are charged and charged particles. Is collected by the ground portion 63 of the ground plate 45 by repelling the high voltage HV applied to the discharge electrode 44 and is collected by repelling the high voltage LV applied to the high voltage electrode plate 47. It is collected by the plate 46 and becomes clean air. The clean air is discharged from the exhaust port 15 to the outside of the housing 11.

  After that, when cooking is finished and the fryer 12 is turned off, the basket 17 is raised to the standby position above the oil tank 16 by the lifting / lowering equipment 18, and the high voltage from the high voltage power supply unit 53 to the charged dust collecting unit 40 is increased. The application of voltage is stopped and the fan 25 is stopped.

  According to the flyer-integrated electric dust collecting unit 10 having the above-described configuration, the ground plate 45 is disposed between the support substrates 43, and the ground plate 45 is grounded, so that oil smoke and oil in the air can be obtained. The charging efficiency of particles such as dust can be increased.

In order to compare the effects of the electrostatic precipitator 13 (form 2) according to the embodiment of the present invention and the prior art (forms 1, 3, and 4), the current value per discharge electrode for each form 1-4 (ΜA) was measured . The specific measurement conditions at this time are as follows: the distance between the support substrates integrated with the discharge electrode 44 is 29.5 mm, from the tip 44a of the discharge electrode 44 to the peripheral edge of the opening 57 of the ground electrode plate 42. The distance was set to 14 mm, a high voltage of 10 KV was applied to the discharge electrode 44, and the ground electrode plate 42 was grounded. And form 1 which does not arrange | position a ground board between support substrates, form 2 which arrange | positions the earthing | grounding board 45 grounded between support substrates, form 3 which arrange | positions the unshielded shielding board between support substrates, and support The current value (μA) per discharge electrode (needle) was measured for each of the forms 4 in which a ground plate to which the same high voltage of 10 KV as the discharge electrode was applied was disposed between the substrates.

According to this measurement result, the current value per discharge electrode (needle) was the largest in the form 2 employing the configuration of the electrostatic precipitator 13 according to the embodiment of the present invention. Therefore, it can be seen that the charging efficiency of the electrostatic precipitator 13 can be increased by arranging the ground plate 45 grounded between the support substrates.

  Further, according to the flyer-integrated electric dust collection unit 10 having the above-described configuration, the discharge is performed so that the tip 44a of the discharge electrode 44 and the peripheral edge of the opening 57 of the ground electrode plate 42 are maintained at a predetermined distance. Since the electrode 44 is disposed corresponding to each opening 57 of the ground electrode plate 42, the air passing through the opening 57 always passes through the charging area EA, and the discharge electrode 44 does not discharge abnormally. Particles such as oil smoke and oil dust in the air can be charged, and charging efficiency can be increased.

  In addition, since the ground electrode plate 42 is arranged in a direction that blocks air flow, the length of the air flow direction can be shortened, and downsizing can be realized. Further, particles such as oil smoke and dust charged by the discharge electrode 44 are reliably collected by moving to the dust collecting plate 46 side by the repulsive action of the high voltage electrode plate 47 provided on the downstream side. can do.

  Further, the distance L1 from the tip 44a of the discharge electrode 44 to the peripheral edge of the opening 57 corresponding to the discharge electrode 44 is shorter than the distance L2 from the discharge electrode 44 to the end of the nearest ground plate 45. Therefore, a discharge area can be reliably generated between the discharge electrode 44 and the ground electrode plate 42. Moreover, since the area of the dust collecting plate 46 can be formed large enough to prevent abnormal discharge and more charged particles can be collected, the collection efficiency of charged particles can be further improved.

  Furthermore, since the charged particles can be collected by the ground portion 63 of the ground plate 45 in addition to the dust collection plate 46, the collection efficiency of the charged particles can be increased and the dust collection plate 46 can be cleaned. The maintenance cycle can be extended.

  The above description of the embodiment of the present invention describes a preferred embodiment of the electrostatic precipitator and the fryer integrated electrostatic precipitator unit according to the present invention, and therefore various technically preferable limitations are attached. However, the technical scope of the present invention is not limited to these embodiments unless specifically described to limit the present invention. That is, the above-described components in the embodiment of the present invention can be appropriately replaced with existing components and the like, and various variations including combinations with other existing components are possible. The description of the embodiment of the present invention described above does not limit the contents of the invention described in the claims.

  The technology of the present invention is used in an electric dust collector and a fryer-integrated electric dust collecting unit that sucks and collects particles such as oil smoke and oil dust generated from a fryer for cooking food with oil at a convenience store or the like. That is expected. The technology of the present invention can also be applied to an apparatus for removing cigarette smoke, and is expected to be used in a cigarette smoke removal apparatus at a pachinko parlor where a compact electric dust collector is required. Furthermore, the technique of the present invention is also expected to be used in an electric dust collector that sucks and collects particles such as dust and oil mist generated in a processing factory.

DESCRIPTION OF SYMBOLS 10 Fryer integrated electric dust collecting unit 11 Case 12 Flyer 13 Electric dust collector 15 Exhaust port 16 Oil tank 17 Basket 18 Lifting equipment 25 Fan 29 Suction port 30 Prefilter 31 Charge dust collecting part 42 Ground electrode plate 43 Support substrate 44 Discharge electrode 44a (discharging electrode) tip 45 ground plate 46 dust collecting plate 47 high voltage electrode plate 57 opening 62 fixing portion 63 grounding portion 64 hole portion 65 protruding portion

Claims (12)

In an electrostatic precipitator that charges and collects particles in dust-containing air by corona discharge generated by the application of high voltage.
A grounding electrode plate that is arranged in a direction that blocks the flow of dusty air and that has a large number of openings that allow the dusty air to pass through;
A plurality of discharge electrodes arranged corresponding to each of the openings on the downstream side in the flow direction of the dust-containing air from the ground electrode plate;
On the downstream side in the flow direction of the dust-containing air from the ground electrode plate, it is arranged in parallel at a constant interval so as not to block the flow of the dust-containing air, and the tip of the discharge electrode and the peripheral edge of the opening are predetermined. A plurality of support substrates for supporting the base end portion of the discharge electrode so as to maintain the interval;
A ground plate disposed between the support substrates so as to face the support substrates;
A positive or negative high voltage is applied to the discharge electrode, the ground electrode plate and the ground plate are grounded ,
The ground plate has a ground portion disposed between the support substrates, and a fixing portion fixed to the ground electrode plate,
The earthing part is formed in parallel so as to be opposed to each other by bending a single plate material on both sides of the fixed part to the downstream side in the flow direction of the dust-containing air .   The electrostatic precipitator according to claim 1, wherein the support substrate and the ground plate are alternately arranged at a predetermined interval.   The distance from the tip of the discharge electrode to the peripheral edge of the opening corresponding to the discharge electrode is from the tip of the discharge electrode to the end of the ground plate closest to the discharge electrode. The electrostatic precipitator according to claim 1, wherein the electrostatic precipitator is provided so as to be shorter than the distance. The ground electrode plate is formed with a protrusion protruding downstream in the direction of the flow of dust-containing air without penetrating the ground electrode plate,
Electrical according to any one of claims 1 to 3, the protrusion portion at a position corresponding to the protrusion portion, characterized in that the hole that can fit is formed on the front Stories solid tough Dust collector.   5. The electrostatic precipitator according to claim 4, wherein the ground plate is fixed to the ground electrode plate by spot-welding the projecting portion of the ground electrode plate with the hole of the ground plate. The electrostatic precipitator according to any one of claims 1 to 5 , wherein the ground portion of the ground plate is formed so as to project from the support substrate to the downstream side in the flow direction of the dust-containing air. . The electrostatic precipitator according to any one of claims 1 to 6 , wherein the discharge electrode is made of Inconel ( registered trademark ) and has a tip portion having a truncated cone shape.   The end of the discharge electrode on the downstream side in the flow direction of the dust-containing air and the end of the support substrate on the downstream side in the flow direction of the dust-containing air are arranged on the same plane. The electric dust collector of any one of Claims 1-7. A plurality of dust collecting plates arranged side by side downstream in the flow direction of the dust-containing air from the discharge electrode, and a high-voltage electrode plate disposed opposite the dust collecting plate between the dust collecting plates. Prepared,
The electric dust collector according to any one of claims 1 to 8 , wherein the dust collecting plate, the ground plate, and the support substrate are provided separately. A plurality of dust collecting plates arranged side by side downstream in the flow direction of the dust-containing air from the discharge electrode, and a high-voltage electrode plate disposed opposite the dust collecting plate between the dust collecting plates. Prepared,
The electric dust collector according to any one of claims 1 to 8 , wherein the dust collecting plate and the ground plate are integrated. The electrostatic precipitator according to claim 9 or 10 , wherein the discharge electrode and the support substrate are integrated. A fryer having an oil tank for storing oil for frying the food, and lifting equipment that operates to raise and lower a basket for storing the food and put it in and out of the oil tank;
A suction port, a prefilter, a fan, and an exhaust port, which are arranged in order from the downstream side in the flow direction of particles generated from the fryer above the fryer;
The electric dust collector according to any one of claims 1 to 11 , which is disposed between the fan and the exhaust port.
Is provided in a common housing. A fryer-integrated electric dust collecting unit.

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