Electrostatic dust collection unit, dust collection assembly, lampblack purification device and range hood

Abstract

The invention relates to the field of electrostatic dust collection, and provides an electrostatic dust collection unit, a dust collection assembly, an oil smoke purification device and an extractor hood. The electrostatic dust collection unit comprises a plurality of high-voltage electrode plates which are arranged in parallel; the plurality of grounding electrode plates are arranged in parallel, the plurality of grounding electrode plates and the plurality of high-voltage electrode plates are staggered and arranged in parallel, an air flow channel is defined between any two adjacent grounding electrode plates and high-voltage electrode plates, and a flow guide part is arranged on the grounding electrode plates at the air inlet of the air flow channel. According to the electrostatic dust collection unit, the flow guide parts are arranged at the air inlet of the airflow channel and on the grounding electrode plate, airflow is decelerated, and the flowing direction of the airflow is changed, so that electrified lampblack particles enter the airflow channel more easily; the efficient adsorption and purification effect of the electrostatic dust collection unit on small-particle-size electrified oil smoke particles at high air speed is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electrostatic dust removal, and in particular to an electrostatic dust collection unit, a dust collection assembly, an oil fume purification device and a range hood. Background Art

[0002] During Chinese cooking, frying, stir-frying, and deep-frying often produce a lot of oil smoke; these oil smoke particles will enter the range hood, the public flue, and be discharged into the outdoor environment through the range hood, causing environmental pollution. Existing range hoods will install oil fume purification devices in the oil fume channel to absorb these oil fume particles.

[0003] The electrode plate structure in the electrostatic dust collection unit of the existing oil fume purification device is usually a linear electrode plate structure. Under high gas flow rate, in order to achieve effective removal of oil fume particles, the only way is to continuously increase the voltage of the charge generating component to increase the charged charge voltage of the oil fume particles, thereby making it easier to collect the charged oil fume particles. However, this method brings the risk of excessive ozone, increases energy consumption, and is not environmentally friendly; moreover, this linear electrode plate structure has limited ability to remove particulate matter in a limited space. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application provides an electrostatic dust collection unit, which can achieve the efficient adsorption and purification of charged oil fume particles with small particle size under high wind speed.

[0005] The present application also provides a dust collection component.

[0006] The present application also provides an oil fume purification device.

[0007] The present application also provides a range hood.

[0008] The electrostatic dust collection unit provided in this application includes:

[0009] A plurality of high-voltage electrode plates, at least two of which are arranged parallel to each other;

[0010] A plurality of grounding electrode plates, at least two of the grounding electrode plates are arranged parallel to each other, at least two of the grounding electrode plates are arranged alternately and parallel to at least two of the high-voltage electrode plates, an air flow channel is defined between any two adjacent grounding electrode plates and the high-voltage electrode plates, and a guide portion is provided on the grounding electrode plate at the air inlet of the air flow channel.

[0011] According to the electrostatic dust collection unit provided in the present application, a guide portion is arranged on the grounding electrode plate. The guide portion can guide the airflow into the airflow channel, slow down the airflow, and change the flow direction of the airflow, so that the charged oil fume particles can more easily enter the airflow channel and be adsorbed onto the grounding electrode plate, thereby improving the adsorption capacity of the grounding electrode plate and improving the cleaning effect of the electrostatic dust collection unit.

[0012] According to an embodiment of the present application, a guide portion is provided between any two adjacent airflow channels, and the guide portion is suitable for guiding airflow into the two adjacent airflow channels.

[0013] According to an embodiment of the present application, the guide portion has a guide curved surface.

[0014] According to an embodiment of the present application, the cross-section of the guide portion is circular or elliptical.

[0015] According to an embodiment of the present application, when the cross-section of the guide portion is circular, the radius of the cross-section is 1 mm to 2 mm.

[0016] According to an embodiment of the present application, the plurality of high-voltage electrode plates and the plurality of grounding electrode plates are all bent plates, so as to define at least one bent structure in the air flow channel.

[0017] According to one embodiment of the present application, the bending structure is wavy, trapezoidal, V-shaped or W-shaped.

[0018] The present application also provides a dust collection component, characterized in that it includes the above-mentioned electrostatic dust collection unit.

[0019] According to one embodiment of the present application, it also includes:

[0020] A bracket, on which the plurality of high-voltage electrode plates and the plurality of grounding electrode plates are mounted;

[0021] a first fixed installation column, the first fixed installation column being passed through the high-voltage electrode plate and the grounding electrode plate, the first fixed installation column being electrically connected to the high-voltage electrode plate;

[0022] A plurality of first spacing sleeves, the plurality of the first spacing sleeves are arranged on the first fixed installation column, the plurality of the first spacing sleeves are used to separate any two adjacent high-voltage electrode plates, and the plurality of the first spacing sleeves are passed through the grounding electrode plate, so that the grounding electrode plate is insulated and connected to the first fixed installation column through the first spacing sleeves;

[0023] a second fixed installation column, the second fixed installation column being arranged through the high voltage electrode plate and the grounding electrode plate, the second fixed installation column being electrically connected to the grounding electrode plate;

[0024] A plurality of second spacer sleeves are provided on the second fixed mounting column, the second spacer sleeves are used to separate any two adjacent grounding electrode plates, and a plurality of second spacer sleeves are passed through the high-voltage electrode plate so that the high-voltage electrode plate is insulated and connected to the second fixed mounting column through the second spacer sleeves.

[0025] The dust collecting assembly provided in the present application includes the above-mentioned electrostatic dust collecting unit and therefore also has the beneficial effects of the above-mentioned electrostatic dust collecting unit, which will not be described in detail here.

[0026] According to an embodiment of the present application, the bracket has two plates arranged opposite to each other along the length direction, and a plurality of the high-voltage electrode plates and a plurality of the grounding electrode plates are located between the two plates.

[0027] Each of the plates is provided with a hollow installation portion, and the first fixed installation column and the second fixed installation column are passed through the hollow installation portion.

[0028] According to one embodiment of the present application, there are two hollow mounting parts, namely a first hollow portion and a second hollow portion. The hollow area of ​​the second hollow portion is larger than the hollow area of ​​the first hollow portion, and the first fixed mounting column is passed through the second hollow portion.

[0029] According to an embodiment of the present application, an insulating sheet is detachably connected to the end of the first fixed installation column, the shape of the insulating sheet corresponds to the shape of the second hollow portion, and the insulating sheet is against the plate body.

[0030] According to an embodiment of the present application, a first stop protrusion is provided at one end of the first fixed installation column, and the insulating sheet is sandwiched between the first stop protrusion and the plate body;

[0031] The other end of the first fixed installation column is threadedly connected to the first nut, and the plurality of high-voltage electrode plates and the plurality of grounding electrode plates are sandwiched between the first stop protrusion and the first nut.

[0032] According to one embodiment of the present application, a second stop protrusion is provided at one end of the second fixed mounting column, and the other end of the second fixed mounting column is threadedly connected to the second nut, and a plurality of the high-voltage electrode plates and a plurality of the grounding electrode plates are clamped between the second stop protrusion and the second nut.

[0033] According to one embodiment of the present application, the high-voltage electrode plate is provided with a first through hole and a second through hole, the first fixed mounting column is passed through the first through hole, the second fixed mounting column is passed through the second through hole, and the aperture of the second through hole is larger than the aperture of the first through hole.

[0034] According to one embodiment of the present application, the grounding electrode plate is provided with a third through hole and a fourth through hole, the first fixed mounting column is passed through the third through hole, the second fixed mounting column is passed through the fourth through hole, and the aperture of the third through hole is larger than the aperture of the fourth through hole.

[0035] According to one embodiment of the present application, the dust collecting assembly further includes a fixing rod having a plurality of slits, and the high-voltage electrode plate and the grounding electrode plate are inserted into corresponding slits.

[0036] According to one embodiment of the present application, there are multiple fixing rods, each of which extends along the arrangement direction of the multiple high-voltage electrode plates;

[0037] In the peripheral direction of the high-voltage electrode plate, a plurality of fixing rods are distributed at intervals.

[0038] The present application also provides an oil fume purification device, comprising a charge generating component and the above-mentioned dust collecting component, wherein the charge generating component is used to charge the oil fume particles, and the dust collecting component is used to collect the charged oil fume particles.

[0039] According to one embodiment of the present application, the charge generating component includes

[0040] A frame, wherein the frame is suitable for being connected to the bracket, and the bracket is used to support the frame;

[0041] A plurality of grounding electrode sheets, each of which is integrally provided with the frame, and the grounding electrode sheet penetrates the frame and the bracket to be grounded.

[0042] The oil fume purification device provided in the present application includes the above-mentioned electrostatic dust collection unit and thus also has the beneficial effects of the above-mentioned electrostatic dust collection unit, which will not be described in detail here.

[0043] According to one embodiment of the present application, a corona discharge device is further included, and the corona discharge device includes:

[0044] A mounting member, the mounting member being adapted to be insulated and connected to the bracket;

[0045] A corona wire fixing plate is connected to the mounting member and is provided with a plurality of spaced apart fixing protrusions. At least one fixing protrusion is provided between any two adjacent ground electrode plates, and the fixing protrusion is suitable for winding the corona wire.

[0046] According to one embodiment of the present application, the mounting piece is in the shape of an elongated strip, and an end portion of the mounting piece has an insulating wrapping piece, and the insulating wrapping piece is insulated and connected to the bracket.

[0047] The present application also provides a range hood, comprising:

[0048] A shell, wherein a fume passage is provided in the shell;

[0049] An oil fume purification device, wherein the oil fume purification device is the above-mentioned oil fume purification device, and the oil fume purification device is arranged in the oil fume passage.

[0050] The range hood provided in the present application includes the above-mentioned electrostatic dust collection unit and thus also has the beneficial effects of the above-mentioned electrostatic dust collection unit, which will not be described in detail here.

[0051] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 It is a schematic diagram of the structure of the frame and the grounding electrode sheet in the charge generating assembly in the oil fume purification device provided in the present application;

[0054] Figure 2 It is a structural schematic diagram of a corona discharge device in a charge generating assembly provided in the present application;

[0055] Figure 3 It is a top view of the frame and the grounding electrode sheet in the charge generating assembly in the oil fume purification device provided in the present application;

[0056] Figure 4 It is a structural schematic diagram of the oil fume purification device provided by the present application;

[0057] Figure 5 It is a structural explosion diagram of the oil fume purification device provided by the present application;

[0058] Figure 6 yes Figure 5 A partial enlarged view of part B in the middle;

[0059] Figure 7 is a side view of the oil fume purification device provided by the present application;

[0060] Figure 8 yes Figure 7 A cross-sectional view along the AA direction;

[0061] Fig. 9 is a front view of the oil fume purification device provided by the present application;

[0062] Fig.10 It is a structural schematic diagram of a high-voltage electrode plate in an electrostatic dust collection unit in an oil fume purification device provided in the present application;

[0063] Fig.11 It is a side view of a high-voltage electrode plate in an electrostatic dust collection unit in the oil fume purification device provided in the present application;

[0064] Fig.12 It is a schematic structural diagram of a grounding electrode plate in an electrostatic dust collection unit in an oil fume purification device provided in the present application;

[0065] Fig.13 It is a side view of a grounding electrode plate in an electrostatic dust collection unit in the oil fume purification device provided in the present application;

[0066] Fig.14 This is a comparison chart of the capture efficiency of charged oil fume particles by the electrostatic dust collection unit in the oil fume purification device provided in the present application and the electrostatic dust collection units in other oil fume purification devices.

[0067] Reference numerals:

[0068] 10. Oil fume purification device;

[0069] 100, charge generating assembly; 101, frame; 1011, first fixing hole; 102, grounding electrode sheet; 103, connecting piece;

[0070] 110, corona discharge device; 111, mounting piece; 112, corona wire fixing piece; 113, fixing protrusion; 114, mounting protrusion; 116, mounting hole; 117, hook;

[0071] 200, dust collection assembly; 210, bracket;

[0072] 220, first fixed installation column; 221, first spacing sleeve; 222, insulating sheet; 223, first stop protrusion; 224, first nut;

[0073] 230, second fixed installation column; 231, second spacing sleeve; 232, second stop protrusion; 233, second nut;

[0074] 240, plate body; 241, first hollow portion; 242, second hollow portion; 243, insulating wrapping member; 244, second fixing hole;

[0075] 250, electrostatic dust collecting unit; 251, high voltage electrode plate; 2511, first through hole; 2512, second through hole; 252, grounding electrode plate; 2521, third through hole; 2522, fourth through hole; 253, guide part; 254, first tip; 255, second tip; 260, fixing rod. DETAILED DESCRIPTION

[0076] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0077] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0078] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0079] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Range hoods have become an essential smoke removal device in home kitchens. During Chinese cooking, frying, stir-frying, and deep-frying often produce a large amount of oil fume particles; these oil fume particles will enter the range hood, the public flue, and be discharged to the outdoor environment through the range hood, causing environmental pollution. Existing range hoods only use oil fume filters to mechanically intercept them, which can effectively intercept larger oil fume particles, but cannot effectively remove PM10 and PM2.5 fine oil fume particles.

[0082] The particle size of oil fume particles generated during cooking is concentrated below PM2.5, especially particles with a size below 0.1 micron, which account for more than 90%; at the same time, in order to achieve a better oil fume extraction effect, a large air volume hood system is used in the range hood. When the oil fume particles flow through the hood, the flow rate of the oil fume particles usually reaches more than 4m / s. Therefore, when using the range hood, the oil fume purification device in the range hood is not very efficient in capturing oil fume particles at a high flow rate.

[0083] In the related art, the oil fume purification device includes a charge generating component and a dust collecting component. When the oil fume particles enter the oil fume purification device, they first pass through the charge generating component and then enter the dust collecting component. The dust collecting component is equipped with an electrostatic dust collecting unit, and the charged oil fume particles will be adsorbed on the electrostatic dust collecting unit. The working principle of the charge generating component is to assemble an electrode plate, and the electrode plate is connected with high voltage. The oil fume particles will pass through the electrode plate, and the high voltage electric field will be used to ionize the pollutants such as the oil fume particles passing through the charge generating component.

[0084] The charged oil fume particles are adsorbed to the electrostatic dust collection unit in the dust collection component under the action of the bias electric field of the dust collection component, thereby being separated from the airflow. Specifically, the electrostatic dust collection unit is equipped with a high-voltage electrode plate and a corresponding grounding electrode plate. The high-voltage electrode plate is externally connected to a high-voltage power supply, and the grounding electrode plate is grounded. An electric field is generated between the high-voltage electrode plate and the grounding electrode plate. Under the action of the electric field, the charged oil fume particles are deflected and finally adsorbed to the electrode plate with the opposite polarity to itself.

[0085] In the related art, when installing the charge generating device in the oil fume purification device, it is necessary to install multiple grounding electrode sheets and corona electrodes that generate high voltage, and it is also necessary to connect the grounding electrode sheets to an external grounding frame. With this connection method, while fixing the grounding electrode sheets to the frame, it is also necessary to set the grounding electrode sheets and the corona electrodes relative to each other, which increases the installation process and makes the structure more complicated.

[0086] The electrode plate structure in the electrostatic dust collection unit of the oil fume purification device is usually a linear electrode plate structure. Under high gas flow rate, in order to achieve effective removal of oil fume particles, the only way is to continuously increase the voltage of the charge generating component to increase the charged charge voltage of the oil fume particles, thereby making it easier to collect the charged oil fume particles. However, this method brings the risk of excessive ozone, increases energy consumption, and is not environmentally friendly; moreover, this linear electrode plate structure has limited ability to remove particulate matter within a limited space.

[0087] When installing the dust collection component in the oil fume purification device, multiple fixed installation columns are required to achieve a stable connection with the electrostatic dust collection unit and the bracket to prevent the electrode plate in the electrostatic dust collection unit from shaking and causing arc discharge. This can easily cause confusion and installation errors in the installation of the fixed installation columns during the installation process, and make the structure of the dust collection component more complicated.

[0088] like Figures 1 to 4 As shown, a charge generating assembly 100 provided according to an embodiment of the present application includes a frame 101 and a plurality of grounding electrode sheets 102. It should be noted that the charge generating assembly 100 can be arranged in an oil fume purification device 10 in a range hood, and the oil fume purification device 10 includes a charge generating assembly 100 and a dust collecting assembly 200, and an electrostatic dust collecting unit 250 is arranged in the dust collecting assembly 200. When the oil fume purification device 10 is working, the charge generating assembly 100 generates electric charge, so that the oil fume particles are charged; when the charged oil fume particles pass through the dust collecting assembly 200, they will be adsorbed by the electrostatic dust collecting unit 250 in the dust collecting assembly 200, so as to achieve the purpose of adsorbing oil fume.

[0089] The frame 101 is suitable for connecting with the bracket 210 in the dust collecting assembly 200, and each grounding electrode sheet 102 is integrally arranged with the frame 101. Here, "integrated arrangement" refers to a non-detachable connection method, for example, the grounding electrode sheet 102 and the frame 101 can be formed into an integrally formed connection method by welding or stamping. When the grounding electrode sheet 102 is welded and connected to the frame 101, during production, the main body of the grounding electrode sheet 102 can be produced independently of the frame 101, and during installation, the grounding electrode sheet 102 is welded to the frame 101, so that the production cost can be reduced. When the grounding electrode sheet 102 and the frame 101 are integrally formed by a stamping process, the grounding electrode sheet 102 and the frame 101 can be placed in a mold for integral stamping to improve production efficiency. The main body of the grounding electrode sheet 102 is set by the frame 101, and the bracket 210 in the dust collecting assembly 200 is grounded. Each ground electrode sheet 102 can be integrally formed with the frame 101 to reduce production costs.

[0090] According to the charge generating component 100 provided in the present application, by integrally forming the frame 101 and the grounding electrode sheet 102 in the charge generating component 100, when the staff installs the oil fume purification device 10, the charge generating component 100 can be directly installed on the bracket 210 of the dust collecting component 200, without the need to additionally install the grounding electrode sheet 102, nor the need to arrange the grounding electrode sheet 102 opposite to the corona electrode, thereby reducing the additional installation process of the grounding electrode sheet 102 in the charge generating component 100 in the electrostatic device, simplifying the structure, and making installation more convenient.

[0091] like Figure 1 As shown, in some embodiments of the present application, the grounding electrode sheet 102 is bent relative to the plane where the frame 101 is located to prevent the grounding electrode sheet 102 from forming an obstruction to the oil fume particles, so that the oil fume particles can pass through the frame 101 and reach the dust collecting assembly 200, so that the dust collecting assembly 200 has a higher capture efficiency for the charged oil fume particles and reduces the probability of the oil fume particles staying on the grounding electrode sheet 102 of the charge generating assembly 100. In addition, by bending the grounding electrode sheet 102 relative to the plane where the frame 101 is located, an airflow channel can be formed between two adjacent grounding electrode sheets 102, and the airflow channel plays a guiding role for the oil fume particles, and the oil fume particles can reach the dust collecting assembly 200 through this airflow channel. In some examples, the grounding electrode sheet 102 and the frame 101 can be formed by stamping from the same plate.

[0092] like Figure 1As shown, in some embodiments of the present application, a connector 103 is provided on the frame 101, and the connector 103 is used to connect the frame 101 and the grounding electrode sheet 102, and to reinforce the connection structure between the grounding electrode sheet 102 and the frame 101, so as to prevent the grounding electrode sheet 102 from being deformed and shaken by the impact of airflow during operation, or even falling off the frame 101. Specifically, the connector 103 can be a rib or rib plate that is stamped integrally with the frame 101 and the grounding electrode sheet 102, so as to further reinforce the connection structure between the grounding electrode sheet 102 and the frame 101, so as to make the connection structure between the grounding electrode sheet 102 and the frame 101 more stable.

[0093] like Figure 3 and Figure 5 As shown, in some embodiments of the present application, the end of the frame 101 that contacts the bracket 210 of the dust collecting assembly 200 is provided with a first fixing hole 1011. In other words, the end of the frame 101 is provided with a first fixing hole 1011, and the first fixing hole 1011 is located at the end of the frame 101 that contacts the bracket 210. A second fixing hole 244 having the same shape and size as the first fixing hole 1011 is provided at a corresponding position of the bracket 210, so that a fixing member (not shown in the figure) can be inserted into the fixing hole, and the charge generating assembly 100 is fixed to the bracket 210 of the dust collecting assembly 200 through the frame 101, thereby increasing the structural stability of the oil fume purification device 10. Among them, the first fixing hole 1011 and the second fixing hole 244 can be threaded holes, and the fixing member can be a bolt matched with the threaded hole. By screwing the bolt into the first fixing hole 1011 and the second fixing hole 244, the frame 101 and the bracket 210 are fixed.

[0094] like Figure 2 As shown, in some embodiments of the present application, the charge generating assembly 100 further includes a corona discharge device 110. The corona discharge device 110 includes a mounting member 111 and a corona wire fixing plate 112. The corona wire fixing plate 112 is used to fix the corona wire, and the corona wire is connected to a high-voltage power supply, so that the corona wire fixing plate 112 generates corona discharge, providing a high-voltage electric field for the charge generating assembly 100. The mounting member 111 is used to be insulated and connected to the bracket 210 on the dust collecting assembly 200, and the corona wire fixing plate 112 is connected to the mounting member 111 to fix the corona wire fixing plate 112 to the bracket 210 through the mounting member 111. A plurality of spaced apart fixing protrusions 113 are provided on the corona wire fixing plate 112, and at least one fixing protrusion 113 is provided between any two adjacent ground electrode sheets 102, and the fixing protrusion 113 is used to wrap around the corona wire (not shown in the figure), and the corona wire can be stably fixed by wrapping around the fixing protrusion 113.

[0095] Specifically, Figure 2As shown, the corona wire fixing piece 112 has a first side and a second side opposite to each other, and a plurality of fixing protrusions 113 are provided on the first side; the number of the grounding electrode pieces 102 is one less than the number of the fixing protrusions 113, so as to ensure that one grounding electrode piece 102 can be accommodated between every two fixing protrusions 113. Since the grounding electrode piece 102 is integrally arranged with the frame 101, the frame 101 is connected with the bracket 210, and the bracket 210 is grounded, the grounding electrode piece 102 can conduct current into the ground, thereby reducing the probability of leakage of the insulating part of the charge generating assembly 100, and increasing the safety of the charge generating assembly 100. Among them, the fixing protrusion 113 can be a triangular structure, or other shapes with sharp structures, and the corona wire can be fixed to the sharp part, so that the corona wire can generate a tip discharge through the sharp part. When the structure of the fixed protrusion 113 is triangular, one of the sharp ends of the fixed protrusion 113 is facing the frame 101, and the corona wire is wound around this end, so that the sharp end of the fixed protrusion 113 can discharge at the tip to generate electric charge, so that the airflow passing through the charge generating component 100 is ionized, thereby charging the oil smoke particles in the airflow.

[0096] A plurality of spaced-apart mounting protrusions 114 are provided on the second side of the corona wire fixing piece 112, and a plurality of mounting holes 116 are provided on the mounting member 111 to cooperate with the plurality of mounting protrusions 114. The number of the mounting protrusions 114 is the same as the number of the mounting holes 116, so that each mounting protrusion 114 can be snapped into the corresponding mounting hole 116, so that the connection between the corona wire fixing piece 112 and the mounting member 111 is more stable. Of course, the arrangement of the mounting protrusion 114 is not limited to this. In other embodiments, the mounting protrusion 114 can also be set to one, for example, the length of the mounting protrusion 114 can be slightly smaller than the length of the mounting member 111. Similarly, the mounting member 111 can have a mounting hole 116 corresponding to the mounting protrusion 114, so that the corona wire fixing piece 112 can be snapped into the mounting hole 116 of the mounting member 111 through the mounting protrusion 114.

[0097] The mounting protrusion 114 and the fixing protrusion 113 of the corona wire fixing sheet 112 and the corona wire fixing sheet body can be connected in an integrated manner by welding or stamping. When the mounting protrusion 114 and the fixing protrusion 113 of the corona wire fixing sheet 112 and the corona wire fixing sheet body are connected by welding, the mounting protrusion 114 and the fixing protrusion 113 of the corona wire fixing sheet 112 can be produced independently of the frame 101 during production, and the mounting protrusion 114 and the fixing protrusion 113 of the corona wire fixing sheet 112 can be connected to the corona wire fixing sheet body by welding during installation. In this way, the production cost can be reduced.

[0098] When the mounting protrusion 114, the fixing protrusion 113 of the corona wire fixing sheet 112 and the corona wire fixing sheet body are integrally formed by a stamping process, the mounting protrusion 114, the fixing protrusion 113 and the corona wire fixing sheet body of the corona wire fixing sheet 112 can be placed in a mold for integral stamping to improve production efficiency. The mounting protrusion 114, the fixing protrusion 113 and the corona wire fixing sheet body of the corona wire fixing sheet 112 are connected by an integral stamping method, which can reduce production costs and make the assembly structure simpler.

[0099] like Figure 2 As shown, in some embodiments of the present application, a hook 117 is provided at the end of the fixing protrusion 113, and the corona wire is wound around the hook 117, thereby further achieving stable fixation of the corona wire and reducing the probability of the corona wire being blown by airflow during operation, deviating from its original position, or even slipping, resulting in poor contact.

[0100] like Figure 2 As shown, in some embodiments of the present application, the mounting member 111 is in the shape of an elongated strip, and the end of the mounting member 111 has an insulating wrapping member 243. When the charge generating assembly 100 is installed in the integrated assembly, the mounting member 111 is clamped in the bracket 210 in the integrated assembly, and the insulating wrapping member 243 at the end of the mounting member 111 can be insulated from the bracket 210. Alternatively, in some other embodiments of the present application, an insulating wrapping member 243 is provided on the bracket 210, and the end of the mounting member 111 can be clamped in the insulating wrapping member 243. In this way, the mounting member 111 can be insulated from the bracket 210 through the insulating wrapping member 243. Thereby reducing the probability of leakage of the charge generating assembly 100 and the dust collecting assembly 200, and increasing the safety of the equipment.

[0101] like Figure 1 As shown, in some embodiments of the present application, the thickness of the ground electrode sheet 102 may be 0.1 mm to 2 mm. The width of the ground electrode sheet 102 may be 10 mm to 100 mm. Of course, in other embodiments of the present application, the width of the electrode sheet may also be 20 mm to 50 mm.

[0102] like Figures 4 to 13As shown, the present application also provides an electrostatic dust collection unit 250, wherein the electrostatic dust collection unit 250 includes a plurality of high-voltage electrode plates 251 and a plurality of grounding electrode plates 252. Here, "high voltage" is a relative concept, and the voltage of the high-voltage electrode plate 251 is higher than the voltage of the grounding electrode plate 252. For example, the high-voltage electrode plate 251 is externally connected to a high-voltage power supply, and the grounding electrode plate 252 is grounded to the insulating part of the dust collection component 200. It should be noted that the electrostatic dust collection unit 250 is installed in the dust collection component 200, and the electric field generated between the high-voltage electrode plate 251 and the grounding electrode plate 252 is an electric field. The charged oil fume particles passing through the charge generating component 100 are deflected in the electric field, separated from the airflow in the range hood, and finally adsorbed to the electrode plate with the opposite polarity to the charged oil fume particles. In the present application, the charged oil fume particles can be adsorbed on the grounding electrode plate 252.

[0103] Multiple high-voltage electrode plates 251 and multiple grounding electrode plates 252 can be installed on the bracket 210, and the multiple grounding electrode plates 252 are staggered and arranged in parallel with the multiple high-voltage electrode plates 251. An airflow channel (not shown in the figure) is defined between any two adjacent grounding electrode plates 252 and high-voltage electrode plates 251, so that charged oil fume particles can pass through the airflow channel and be adsorbed on the grounding electrode plate 252. At the air inlet of the airflow channel, a guide portion 253 is provided on the grounding electrode plate 252. When the charged oil fume particles flow to the air inlet, the guide portion 253 can guide the charged oil fume particles into the airflow channel, and under the guiding action of the guide portion 253, the movement direction of the charged oil fume particles is deviated relative to the extension direction of the airflow channel. Under the influence of the electric field, the charged oil fume particles are deflected toward the grounding electrode plate 252, thereby separating from the airflow and being adsorbed onto the grounding electrode plate 252, thereby improving the adsorption capacity of the grounding electrode plate 252 and improving the cleaning effect of the electrostatic dust collection unit 250.

[0104] The electrostatic dust collection unit 250 provided in the present application is configured with a guide portion 253 on the grounding electrode plate 252. The guide portion 253 can guide the airflow into the airflow channel, slow down the airflow, and change the flow direction of the airflow, so that the charged oil fume particles can more easily enter the airflow channel and be adsorbed onto the grounding electrode plate 252, thereby improving the adsorption capacity of the grounding electrode plate 252 and improving the cleaning effect of the electrostatic dust collection unit 250.

[0105] like Figure 8 As shown, in some embodiments of the present application, a guide portion 253 is provided between any two adjacent air flow channels, and the guide portion 253 can guide the air flow into the two adjacent air flow channels. Fig.12As shown, the guide portion 253 has a guide curved surface, which can decelerate the airflow, thereby decelerating the charged oil fume particles in the airflow, so that the grounding electrode plate 252 has a higher efficiency in adsorbing the charged oil fume particles. Furthermore, two guide curved surfaces are provided on the guide portion 253, so that one guide portion 253 can guide the airflow for two airflow channels at the same time, thereby improving the capture efficiency of the electrostatic dust collection unit 250 for charged oil fume particles.

[0106] like Figure 8 and Fig.13 As shown, in some embodiments of the present application, the cross-section of the guide portion 253 can be circular or elliptical, so that the vertical distance from the grounding electrode plate 252 to the high-voltage electrode plate 251 can be reduced, thereby increasing the electric field strength between the grounding electrode plate 252 and the high-voltage electrode plate 251, and increasing the deflection angle of the charged oil fume particles in the airflow channel, thereby increasing the capture efficiency of the grounding electrode plate 252 for the charged oil fume particles.

[0107] like Fig.13 As shown, in some embodiments of the present application, when the cross section of the guide portion 253 is circular, the radius of the cross section is 1 mm to 2 mm. For example, the radius of the cross section of the guide portion 253 may be 1.5 mm.

[0108] like Fig.11 and Fig.13 As shown, in some embodiments of the present application, multiple high-voltage electrode plates 251 and multiple grounding electrode plates 252 are all bent plates to define at least one bending structure in the airflow channel. When the airflow passes through the bending structure, the flow rate of the airflow will also change. When the airflow passes through a relatively flat area in the bending structure, the flow rate of the airflow will decrease, thereby increasing the residence time of the charged oil fume particles flowing through the area on the grounding electrode plate 252, thereby achieving effective collection of the charged oil fume particles on the grounding electrode plate 252.

[0109] In some embodiments of the present application, the bending structure may be wavy, trapezoidal, V-shaped or W-shaped. In this way, in the airflow channel, the airflow may flow along the path of the perimeter line of the trapezoid, the wavy line, the V-shaped line or the W-shaped line. Fig.11 and Fig.13 As shown, taking the bent structure as a trapezoid as an example, when the airflow enters the airflow channel, after the airflow passes through the first tip 254 of the trapezoidal structure and deflects in direction, the airflow will flow along the waist of the trapezoid to the bottom of the trapezoid, and then reach the second tip 255 from the second waist of the trapezoid, so that the flow rate of the airflow near the trapezoidal structure is relatively smooth. There is a larger low-speed area in the airflow field of the trapezoidal structure, which can further increase the residence time of the charged oil fume particles flowing through this area on the ground electrode plate 252, thereby achieving effective collection of the charged oil fume particles on the ground electrode plate 252.

[0110] like Fig.13 As shown, Fig.13 The capture efficiency of charged oil fume particles by the electrostatic dust collecting unit 250 with a flat electrode plate and a trapezoidal electrode plate with a cylindrical guide portion 253 is compared.

[0111] The horizontal axis is the inlet wind speed, and the vertical axis is the capture efficiency of the electrode plate for charged oil fume particles. The square points are the changes in the capture efficiency of the flat electrode plate for charged oil fume particles with a particle size of 0.3 microns to 0.4 microns at different inlet wind speeds (1m / s-6m / s). The circular points are the changes in the capture efficiency of the flat electrode plate for charged oil fume particles with a particle size of 1 micron to 2.5 microns at different inlet wind speeds (1m / s-6m / s). The regular triangle points are the changes in the capture efficiency of the trapezoidal electrode plate with a cylindrical guide 253 for charged oil fume particles with a particle size of 0.3 microns to 0.4 microns at different inlet wind speeds (1m / s-6m / s). The inverted triangle points are the changes in the capture efficiency of the trapezoidal electrode plate with a cylindrical guide 253 for charged oil fume particles with a particle size of 1 micron to 2.5 microns at different inlet wind speeds (1m / s-6m / s).

[0112] By comparing the capture efficiency of charged oil fume particles of the electrostatic dust collection unit 250 of the flat electrode plate and the trapezoidal electrode plate with the cylindrical guide 253 at different inlet wind speeds (1m / s-6m / s), it can be seen that the trapezoidal electrode plate with the cylindrical guide 253 has improved capture of charged oil fume particles of different particle sizes. When the wind speed of the inlet airflow is lower than 1.5m / s, the capture efficiency of the trapezoidal electrode plate with the cylindrical guide 253 for charged oil fume particles of small particle size is slightly improved compared to the capture efficiency of the flat electrode plate for charged oil fume particles of small particle size. As the air flow velocity increases, the capture efficiency of the flat electrode plate for charged oil fume particles with a particle size of 0.3 microns to 0.4 microns and charged oil fume particles with a particle size of 1.0 microns to 2.5 microns decreases significantly, while the trapezoidal electrode plate with a cylindrical guide portion 253 can slow down the trend of decreasing capture efficiency for charged oil fume particles.

[0113] When the air flow velocity is 6 m / s, the trapezoidal electrode plate with the cylindrical guide portion 253 has a capture efficiency of 20.69% for charged oil fume particles in the particle size range of 0.3 μm to 0.4 μm, while the capture efficiency of the flat electrode plate for such charged oil fume particles is 1.44%. The capture efficiency of the trapezoidal electrode plate with the cylindrical guide portion 253 for charged oil fume particles in the particle size range of 0.3 μm to 0.4 μm is higher than that of the flat electrode plate for such charged oil fume particles. It was increased by 19.25%; for charged oil fume particles in the particle size range of 1.0 micron-2.5 micron, the capture efficiency of the trapezoidal electrode plate with a cylindrical guide portion 253 was 82.29%, and the capture efficiency of the flat electrode plate was 52.76%. The capture efficiency of the trapezoidal electrode plate with a cylindrical guide portion 253 for charged oil fume particles in the particle size range of 1.0 micron-2.5 micron was increased by 29.53% compared with the capture efficiency of the flat electrode plate for such charged oil fume particles.

[0114] like Figures 4 to 13 As shown, the present application also provides a dust collection assembly 200, which includes the above-mentioned electrostatic dust collection unit 250, and also includes a first fixed installation column 220, a plurality of first spacing sleeves 221, a second fixed installation column 230 and a plurality of second spacing sleeves 231. The first fixed installation column 220 is inserted through the high-voltage electrode plate 251 and the grounding electrode plate 252, the first fixed installation column 220 is electrically connected to the high-voltage electrode plate 251, a plurality of first spacing sleeves 221 are arranged on the first fixed installation column 220, and the plurality of first spacing sleeves 221 are used to separate any two adjacent high-voltage electrode plates 251, so that the high-voltage electrode plate 251 is loaded with an external high-voltage power supply through the first installation column; and a plurality of first spacing sleeves 221 are inserted through the grounding electrode plate 252, so that the grounding electrode plate 252 is insulated and connected to the first fixed installation column 220 through the first spacing sleeve 221.

[0115] The second fixed installation column 230 is passed through the high-voltage electrode plate 251 and the grounding electrode plate 252, and the second fixed installation column 230 is electrically connected to the grounding electrode plate 252. A plurality of second spacing sleeves 231 are provided on the second fixed installation column 230, and the second spacing sleeves 231 are used to separate any two adjacent grounding electrode plates 252, so that the grounding electrode plate 252 is in contact with the bracket 210 and grounded through the second installation column; and a plurality of second spacing sleeves 231 are passed through the high-voltage electrode plate 251, so that the high-voltage electrode plate 251 is insulated and connected to the second fixed installation column 230 through the second spacing sleeves 231.

[0116] The dust collecting assembly 200 provided in the present application realizes effective spacing between the high-voltage electrode plate 251 and the grounding electrode plate 252 in the electrostatic dust collecting unit 250 in the dust collecting assembly 200 by arranging multiple first spacing sleeves 221 on the first fixed mounting column 220 and multiple second spacing sleeves 231 on the second fixed mounting column 230, thereby solving the complex installation problem of the electrostatic dust collecting unit 250 in the dust collecting assembly 200 of the conventional oil fume purification device 10, avoiding the complex process installation problem caused by the repeated use of fixed mounting columns, and the installation process is simple and the cost is low.

[0117] like Figure 5 As shown, in some embodiments of the present application, the bracket 210 has two plates 240 arranged opposite to each other along the length direction, a plurality of high-voltage electrode plates 251 and a plurality of grounding electrode plates 252 are located between the two plates 240, each plate 240 is provided with a hollow mounting portion, and the first fixed mounting column 220 and the second fixed mounting column 230 are arranged in the hollow mounting portion, so as to play the role of fixing the high-voltage electrode plate 251 and the grounding electrode plate 252 in the electrostatic dust collection unit 250 between the plates 240, and the plates 240 are insulating parts to increase the safety of the dust collection assembly 200 when in use. Further, the electrode plate closest to the plate 240 is the high-voltage electrode plate 251.

[0118] In some embodiments of the present application, the hollow mounting portion may be a special-shaped hole. For example, the shape of the special-shaped hole may be two circular holes connected at both ends and a special-shaped hole with a protrusion in the middle; the first fixed mounting column 220 may be passed through one of the circular holes on the special-shaped hole, and the second fixed mounting column 230 may be passed through the other circular hole, and the first fixed mounting column 220 and the second fixed mounting column 230 are limited by the protrusion in the middle. In addition, the structure of the hollow mounting portion may also be a special-shaped hole with a gap in the middle and circular holes connected by the gap at both ends. The first fixed mounting column 220 may be passed through one of the circular holes on the special-shaped hole, and the second fixed mounting column 230 may be passed through the other circular hole, and the first fixed mounting column 220 and the second fixed mounting column 230 are limited by the gap in the middle. Of course, the structure of the hollow mounting portion is not limited to this. Figure 5 and Figure 6 As shown, in some embodiments of the present application, there may be two hollow mounting parts, the first fixed mounting column 220 is passed through one of the hollow mounting parts (equivalent to the first hollow portion 241), and the second fixed mounting column 230 is passed through the other hollow mounting part (equivalent to the second hollow portion 242).

[0119] like Figure 5 and Figure 6As shown, in some embodiments of the present application, when there are two hollow mounting parts, namely a first hollow portion 241 and a second hollow portion 242, the hollow area of ​​the second hollow portion 242 is larger than the hollow area of ​​the first hollow portion 241, and the first fixed mounting column 220 is passed through the second hollow portion 242.

[0120] like Figure 5 As shown, in some embodiments of the present application, the end of the first fixed mounting column 220 is detachably connected with an insulating sheet 222, the shape of the insulating sheet 222 corresponds to the shape of the second hollow portion 242, and the insulating sheet 222 abuts against the plate body 240 to completely insulate the plate body 240 to prevent leakage. When the staff repairs the oil fume purification device 10, the staff can touch the plate body 240 without electric shock, thereby improving the safety of the staff during operation.

[0121] like Figure 5 As shown, in some embodiments of the present application, a first stop protrusion 223 is provided at one end of the first fixed installation column 220, and an insulating sheet 222 is sandwiched between the first stop protrusion 223 and the plate body 240. The other end of the first fixed installation column 220 is threadedly connected with the first nut 224, and a plurality of high-voltage electrode plates 251 and a plurality of grounding electrode plates 252 are sandwiched between the first stop protrusion 223 and the first nut 224. The first stop protrusion 223 and the first nut 224 fix the first fixed installation column 220 to the plate body 240 and the high-voltage electrode plate 251 to prevent the first fixed installation column 220 from slipping. The first stop protrusion 223 is an insulating member, which protrudes from the plate body 240 to reduce the leakage probability of the first fixed installation column 220, thereby increasing the safety of the dust collection assembly 200, so that the staff will not be electrocuted when touching the plate body 240.

[0122] like Figure 5 As shown, in some embodiments of the present application, a second stop protrusion 232 is provided at one end of the second fixed installation column 230, and the other end of the second fixed installation column 230 is threadedly connected with the second nut 233, and a plurality of high-voltage electrode plates 251 and a plurality of grounding electrode plates 252 are sandwiched between the second stop protrusion 232 and the second nut 233. The second stop protrusion 232 and the second nut 233 fix the second fixed installation column 230 to the plate body 240 and the high-voltage electrode plate 251 to prevent the second fixed installation column 230 from slipping. The second stop protrusion 232 is an insulating member, which is protruded from the plate body 240 to reduce the leakage probability of the second fixed installation column 230, thereby increasing the safety of the dust collection assembly 200, so that the staff will not be electrocuted when touching the plate body 240.

[0123] like Fig.10As shown, in some embodiments of the present application, the high-voltage electrode plate 251 is provided with a first through hole 2511 and a second through hole 2512, the first fixed installation column 220 is penetrated through the first through hole 2511, the second fixed installation column 230 is penetrated through the second through hole 2512, and the aperture of the second through hole 2512 is larger than the aperture of the first through hole 2511. The first fixed installation column 220 can contact the high-voltage electrode plate 251 through the first through hole 2511; while the second fixed installation column 230 is suspended in the second through hole 2512 to avoid contact with the high-voltage electrode plate 251, thereby avoiding the possibility of the grounding electrode plate 252 being connected to the high-voltage electrode plate 251.

[0124] like Fig.12 As shown, in some embodiments of the present application, the grounding electrode plate 252 is provided with a third through hole 2521 and a fourth through hole 2522, the first fixed installation column 220 is penetrated in the third through hole 2521, the second fixed installation column 230 is penetrated in the fourth through hole 2522, and the aperture of the third through hole 2521 is larger than the aperture of the fourth through hole 2522. The second fixed installation column 230 can contact the grounding electrode plate 252 through the fourth through hole 2522, while the first fixed installation column 220 is suspended in the third through hole 2521 to avoid contact with the grounding electrode plate 252. The possibility of the grounding electrode plate 252 being connected to the high-voltage electrode plate 251 is avoided.

[0125] like Figure 5 , Figure 8 As shown in the figure, in some embodiments of the present application, the position of the first spacing sleeve 221 of the first fixed installation column 220 is staggered with the position of the second spacing sleeve 231 of the second fixed installation column 230. Since the aperture of the second through hole 2512 of the high-voltage electrode plate 251 is larger than the aperture of the first through hole 2511, and the aperture of the first through hole 2511 is smaller than the diameter of the first spacing sleeve 221, the aperture of the second through hole 2512 is larger than the diameter of the second spacing sleeve 231; the aperture of the third through hole 2521 of the grounding electrode plate 252 is larger than The aperture of the fourth through hole 2522 is smaller than the diameter of the second spacing sleeve 231, and the aperture of the third through hole 2521 is larger than the diameter of the first spacing sleeve 221; when the first spacing sleeve 221 contacts the high-voltage electrode plate 251, the second spacing sleeve 231 contacts the grounding electrode plate 252. Since the aperture of the second through hole 2512 of the high-voltage electrode plate 251 is larger than the diameter of the second spacing sleeve 231, the second spacing sleeve 231 will pass through the high-voltage electrode plate 251 and contact the grounding electrode plate 252. Similarly, since the aperture of the third through hole 2521 of the grounding electrode plate 252 is larger than the diameter of the first spacing sleeve 221, the first spacing sleeve 221 will pass through the third through hole 2521 and contact the second high-voltage electrode plate 251.

[0126] like Figure 5As shown, in some embodiments of the present application, the dust collecting assembly 200 also includes a fixing rod 260 having a plurality of slits, and the high-voltage electrode plate 251 and the grounding electrode plate 252 are inserted into the corresponding slits, thereby achieving the interval fixation of the high-voltage electrode plate 251 and the grounding electrode plate 252.

[0127] like Figure 4 and Figure 5 As shown, in some embodiments of the present application, there may be multiple fixing rods 260, each of which extends along the arrangement direction of the multiple high-voltage electrode plates 251; and multiple fixing rods 260 are spaced apart in the peripheral direction of the high-voltage electrode plates 251. This further fixes the high-voltage electrode plates 251 and the grounding electrode plates 252 in the dust collecting assembly 200, preventing the electrode plates from being misaligned during use, thereby causing poor contact.

[0128] like Figure 4 As shown, the present application also provides an oil fume purification device 10, comprising the above-mentioned charge generating component 100 and dust collecting component 200, the charge generating component 100 is used to charge the oil fume particles, and the dust collecting component 200 is used to collect the charged oil fume particles.

[0129] The oil fume purification device 10 provided in the present application includes the above-mentioned charge generating component 100 and the above-mentioned dust collecting component 200, and therefore also has the beneficial effects of the above-mentioned charge generating component 100 and the above-mentioned dust collecting component 200, which will not be repeated here.

[0130] When the oil fume particles enter the oil fume purification device 10 along with the airflow, the oil fume particles first pass through the charge generating assembly 100, the corona wire tip discharges, and the air is ionized, so that the oil fume particles in the airflow are charged. The airflow with the charged oil fume particles passes through the airflow channel formed between two adjacent grounding electrode sheets 102 and reaches the dust collecting assembly 200.

[0131] At the air inlet of the air flow channel of the dust collecting assembly 200, since the guide portion 253 is provided on the grounding electrode plate 252, when the charged oil fume particles flow to the air inlet, the guide portion 253 can guide the charged oil fume particles into the air flow channel, and under the guiding action of the guide portion 253, the movement direction of the charged oil fume particles is deflected relative to the extension direction of the air flow channel, and under the influence of the electric field, the charged oil fume particles are deflected toward the grounding electrode plate 252. In addition, since the guide portion 253 is cylindrical, the vertical distance from the grounding electrode plate 252 to the high-voltage electrode plate 251 is reduced, thereby increasing the electric field strength between the grounding electrode plate 252 and the high-voltage electrode plate 251, increasing the deflection angle of the charged oil fume particles in the air flow channel, and thereby increasing the capture efficiency of the grounding electrode plate 252 for the charged oil fume particles.

[0132] Since the electrode plate is a bent trapezoidal structure, when the airflow enters the airflow channel, after the airflow passes through the first tip 254 of the trapezoidal structure and is deflected in direction, the airflow will flow along the waist of the trapezoid to the bottom of the trapezoid, and then reach the second tip 255 from the second waist of the trapezoid, so that the flow rate of the airflow near the trapezoidal structure is relatively smooth. There is a larger low-speed area in the airflow field of the trapezoidal structure, which can further increase the residence time of the charged oil fume particles flowing through this area on the ground electrode plate 252, thereby achieving effective collection of the charged oil fume particles on the ground electrode plate 252.

[0133] When installing the oil fume purification device 10 provided by the present application, when assembling the charge generating assembly 100, it is only necessary to fix the frame 101 to the plate 240 of the bracket 210 of the dust collecting assembly 200 through the fixing member, and to clamp the mounting protrusion 114 on the corona wire fixing piece 112 into the mounting hole 116 of the mounting piece 111, and then clamp the mounting hole 116 into the insulating member of the plate 240. Finally, the corona wire is wound around the hook 117 of the corona wire fixing piece 112, and the installation of the charge generating assembly 100 is completed.

[0134] When assembling the dust collecting assembly 200, the first fixed installation column 220 needs to be inserted into the insulating sheet 222, and then the first fixed installation column 220 with the insulating sheet 222 inserted into the second hollow portion 242 of the plate body 240, and the second fixed installation column 230 needs to be inserted into the first hollow portion 241 of the plate body 240. Then, the first spacing sleeve 221 is inserted into the first fixed installation column 220, and the second spacing sleeve 231 is inserted into the second fixed installation column 230, and the first through hole 2511 of the high-voltage electrode plate 251 is aligned with the second hollow portion 242, and the second through hole 2512 is aligned with the first hollow portion 241 and installed to the fixed installation column. Then, the first spacer sleeve 221 is again inserted into the first fixed installation column 220, and the second spacer sleeve 231 is inserted into the second fixed installation column 230, and the third through hole 2521 of the grounding electrode plate 252 is aligned with the first through hole 2511, and the fourth through hole 2522 is aligned with the second through hole 2512, and then installed to the fixed installation column. Repeat the operation several times until the electrostatic dust collection unit 250 is installed, and finally the first nut 224 is installed to the first fixed installation column 220, and the second nut 233 is installed to the second fixed installation column 230. Finally, the fixing rod 260 is installed to complete the fixing of the electrostatic dust collection unit 250.

[0135] The present application also provides a range hood, comprising a housing and the above-mentioned oil fume purification device 10. An oil fume passage is provided in the housing, and the oil fume purification device 10 is provided in the oil fume passage, and the oil fume purification device 10 is used to purify the oil fume in the oil fume passage. The range hood provided in the present application, because it includes the above-mentioned charge generation component 100 and the above-mentioned dust collection component 200, also has the beneficial effects of the above-mentioned charge generation component 100 and the above-mentioned dust collection component 200, which will not be described in detail here.

[0136] Finally, it should be noted that the above implementation modes are only used to illustrate the present application, and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Claims

1. An electrostatic dust collection unit, characterized in that: include: A plurality of high-voltage electrode plates, at least two of which are arranged parallel to each other; A plurality of grounding electrode plates, at least two of the grounding electrode plates are arranged parallel to each other, at least two of the grounding electrode plates are arranged alternately and parallel to at least two of the high-voltage electrode plates, an air flow channel is defined between any two adjacent grounding electrode plates and the high-voltage electrode plates, and a guide portion is provided on the grounding electrode plate at the air inlet of the air flow channel.

2. The electrostatic dust collection unit according to claim 1, characterized in that: A guide portion is provided between any two adjacent air flow channels, and the guide portion is suitable for guiding air flow into the two adjacent air flow channels.

3. The electrostatic dust collection unit according to claim 1, characterized in that: The guide portion has a guide curved surface.

4. The electrostatic dust collection unit according to claim 3, characterized in that: The cross section of the guide portion is circular or elliptical.

5. The electrostatic dust collection unit according to claim 4, characterized in that: When the cross section of the guide portion is circular, the radius of the cross section is 1 mm to 2 mm.

6. The electrostatic dust collection unit according to claim 1, characterized in that: The plurality of high-voltage electrode plates and the plurality of grounding electrode plates are all bent plates, so as to define at least one bent structure in the air flow channel.

7. The electrostatic dust collection unit according to claim 6, characterized in that: The bending structure is in a wave shape, a trapezoidal shape, a V shape or a W shape.

8. A dust collecting assembly, characterized in that: Comprising an electrostatic dust collection unit according to any one of claims 1 to 7.

9. The dust collecting assembly according to claim 8, characterized in that: Also includes: A bracket, on which the plurality of high-voltage electrode plates and the plurality of grounding electrode plates are mounted; a first fixed installation column, the first fixed installation column being passed through the high-voltage electrode plate and the grounding electrode plate, the first fixed installation column being electrically connected to the high-voltage electrode plate; A plurality of first spacing sleeves, the plurality of the first spacing sleeves are arranged on the first fixed installation column, the plurality of the first spacing sleeves are used to separate any two adjacent high-voltage electrode plates, and the plurality of the first spacing sleeves are passed through the grounding electrode plate, so that the grounding electrode plate is insulated and connected to the first fixed installation column through the first spacing sleeves; a second fixed installation column, the second fixed installation column being arranged through the high voltage electrode plate and the grounding electrode plate, the second fixed installation column being electrically connected to the grounding electrode plate; A plurality of second spacer sleeves are provided on the second fixed mounting column, the second spacer sleeves are used to separate any two adjacent grounding electrode plates, and a plurality of second spacer sleeves are passed through the high-voltage electrode plate so that the high-voltage electrode plate is insulated and connected to the second fixed mounting column through the second spacer sleeves.

10. The dust collecting assembly according to claim 9, characterized in that: The bracket has two plates arranged opposite to each other along the length direction, and a plurality of the high-voltage electrode plates and a plurality of the grounding electrode plates are located between the two plates. Each of the plates is provided with a hollow installation portion, and the first fixed installation column and the second fixed installation column are passed through the hollow installation portion.

11. The dust collecting assembly according to claim 10, characterized in that: There are two hollow installation parts, which are a first hollow part and a second hollow part respectively. The hollow area of ​​the second hollow part is larger than the hollow area of ​​the first hollow part. The first fixed installation column is penetrated through the second hollow part.

12. The dust collecting assembly according to claim 11, characterized in that: An insulating sheet is detachably connected to the end of the first fixed installation column, the shape of the insulating sheet corresponds to the shape of the second hollow portion, and the insulating sheet abuts against the plate body.

13. The dust collecting assembly according to claim 12, characterized in that: A first stop protrusion is provided at one end of the first fixed installation column, and the insulating sheet is sandwiched between the first stop protrusion and the plate body; The other end of the first fixed installation column is threadedly connected to the first nut, and the plurality of high-voltage electrode plates and the plurality of grounding electrode plates are sandwiched between the first stop protrusion and the first nut.

14. The dust collecting assembly according to claim 8, characterized in that: A second stop protrusion is provided at one end of the second fixed installation column, and the other end of the second fixed installation column is threadedly connected to the second nut, and a plurality of the high-voltage electrode plates and a plurality of the grounding electrode plates are clamped between the second stop protrusion and the second nut.

15. The dust collecting assembly according to claim 8, characterized in that: The high voltage electrode plate is provided with a first through hole and a second through hole, the first fixed mounting column is passed through the first through hole, the second fixed mounting column is passed through the second through hole, and the aperture of the second through hole is larger than the aperture of the first through hole.

16. The dust collecting assembly according to claim 8, characterized in that: The grounding electrode plate is provided with a third through hole and a fourth through hole, the first fixed mounting post is passed through the third through hole, the second fixed mounting post is passed through the fourth through hole, and the aperture of the third through hole is larger than the aperture of the fourth through hole.

17. The dust collecting assembly according to claim 8, characterized in that: The dust collecting assembly further comprises a fixing rod having a plurality of slits, and the high voltage electrode plate and the grounding electrode plate are inserted into the corresponding slits.

18. The dust collecting assembly according to claim 17, characterized in that: There are multiple fixing rods, each of which extends along the arrangement direction of the multiple high-voltage electrode plates; In the peripheral direction of the high-voltage electrode plate, a plurality of fixing rods are distributed at intervals.

19. A fume purification device, characterized in that: It comprises a charge generating component and a dust collecting component as claimed in any one of claims 8 to 18, wherein the charge generating component is used to charge oil fume particles, and the dust collecting component is used to collect charged oil fume particles.

20. The oil fume purification device according to claim 19, characterized in that: The charge generating component comprises A frame, wherein the frame is suitable for being connected to the bracket, and the bracket is used to support the frame; A plurality of grounding electrode sheets, each of which is integrally provided with the frame, and the grounding electrode sheet penetrates the frame and the bracket to be grounded.

21. The oil fume purification device according to claim 20, characterized in that: Also included is a corona discharge device, the corona discharge device comprising: A mounting member, the mounting member being adapted to be insulated and connected to the bracket; A corona wire fixing plate is connected to the mounting member and is provided with a plurality of spaced apart fixing protrusions. At least one fixing protrusion is provided between any two adjacent ground electrode plates, and the fixing protrusion is suitable for winding the corona wire.

22. The oil fume purification device according to claim 21, characterized in that: The mounting piece is in the shape of an elongated strip, and an end portion of the mounting piece is provided with an insulating wrapping piece, and the insulating wrapping piece is insulated and connected to the bracket.

23. A range hood, characterized in that: include: A shell, wherein a fume passage is provided in the shell; An oil fume purification device, wherein the oil fume purification device is the oil fume purification device according to any one of claims 19-22, and the oil fume purification device is arranged in the oil fume passage.

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