Range hood electrostatic purifier and range hood

Abstract

The utility model relates to an electrostatic purifier of a range hood, and belongs to the technical field of electrostatic purification of lampblack. The box comprises a hollow box body and at least one electric field arranged in the box body, the box body comprises an air inlet and an air outlet which are oppositely arranged, a water outlet is formed in the bottom of the box body, a spraying assembly is arranged at the top in the box body, the spraying assembly is provided with a water inlet connector, the water inlet connector extends to the outer side of the box body, and the water inlet connector is used for being connected with a water source; and the electric control box is electrically connected with the electric field. The problem that pollutants are accumulated in an electric field of the electrostatic purifier, and the function of the electrostatic purifier is affected is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the oil fume electrostatic purification technical field, concretely relates to an oil fume machine electrostatic purifier and oil fume machine. BACKGROUND

[0002] The electrostatic purification technology has high oil fume purification capacity, has good removal effect to small particle size oil fume particles, can effectively reduce the pollution of oil fume to the environment, and is widely applied to family kitchen and commercial kitchen environment such as hotel, restaurant and mess. The technology is mainly based on the principle of electrostatic adsorption, constructs the electric field, makes the air in the electric field ionize, and then promotes the oil fume particles to be electrified. Subsequently, under the action of electric field force, the electrified oil fume particles are adsorbed to the polar plate, the separation of oil fume and air is realized, and the purification purpose is achieved.

[0003] However, in the actual oil fume purification process, the electric field inevitably adsorbs a large amount of oil fume particles and dust. With the passage of time, these pollutants gradually accumulate on the polar plate, electrode and other components of the electric field, and then cause many problems. On the one hand, the dust on the polar plate thickens continuously, which hinders the normal charge conduction of the electric field, causes the adsorption force of the polar plate to the electrified oil fume particles to weaken, and part of the adsorbed oil fume particles may even separate again due to insufficient adsorption force and re-mix into the air. The dust on the electrode changes its sharp end discharge characteristics, causing uneven discharge, and even causing discharge interruption. This greatly destroys the original uniform electric field strength distribution of the electric field, greatly reduces the ionization efficiency of the electric field to the oil fume particles, causes a large amount of oil fume particles to be insufficiently electrified, and also greatly reduces the adsorption effect of the electrified oil fume particles, finally leading to a significant decrease in purification efficiency, which is difficult to meet the high standard requirements of the kitchen environment for oil fume purification. Secondly, due to the complexity of oil fume composition, containing various acidic substances and moisture. Long-term attachment on the polar plate and electrode will cause chemical reaction with metal materials, resulting in corrosion and rust of the components. After the polar plate is corroded, its surface becomes rough and pitted, affecting the uniformity of the electric field and the adsorption effect. When the electrode is severely corroded, the sharp end becomes blunt, the discharge performance decreases sharply, further deteriorating the ionization effect and shortening the overall service life of the equipment. On the other hand, with the continuous accumulation of pollutants, especially the conductive dirt formed by the mixture of oil stains and dust, a conductive path is gradually formed between the polar plate and the electrode. When accumulated to a certain extent, short circuit may occur. Once short circuit occurs, the electric field cannot work normally, and the entire electrostatic purification device will stop running, not only losing the purification function, but also possibly causing damage to the power supply, control circuit and other equipment due to abnormal current, and even causing safety accidents such as fire hazards. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an oil fume machine electrostatic purifier and oil fume machine, aiming at solving the technical problems mentioned in the background technology.

[0005] To achieve the above object, the utility model provides a kind of range hood electrostatic purifier, including purification tank and electric cabinet;

[0006] The purification tank includes at least one electric field arranged in the hollow box body, the box body includes oppositely arranged air inlet and air outlet, the box body bottom is provided with drain, the box body top is provided with spray assembly, the spray assembly is provided with water inlet connector, the water inlet connector extends to the outside of the box body, and the water inlet connector is used to connect water source.

[0007] The electric cabinet and the electric field are electrically connected.

[0008] Optionally, the box body further includes an access hole with a hatch, and the hatch is formed by the shell of the electric cabinet.

[0009] Optionally, the spray assembly includes a longitudinal main pipeline, a plurality of spray heads and a plurality of transverse branch pipelines, the plurality of transverse branch pipelines are in orthogonal communication with the longitudinal main pipeline, the plurality of spray heads are arranged in an array on each transverse branch pipeline, and the water inlet connector is arranged on the longitudinal main pipeline.

[0010] Optionally, the box body further includes a first U-shaped keel, the first U-shaped keel is fixed to the inner top of the box body, the first U-shaped keel is provided with a positioning groove, and the transverse branch pipeline is embedded in the positioning groove.

[0011] Optionally, the box body further includes a heater, the heater is used to heat the electric field, and the heater and the electric cabinet are electrically connected.

[0012] Optionally, the box body further includes a plurality of second U-shaped keels, each second U-shaped keel is perpendicular to the airflow direction S, the plurality of second U-shaped keels are linearly arranged along the airflow direction S at the bottom of the box body, the electric field is located on the second top plate of the second U-shaped keel, and the heater is located in the groove of the second U-shaped keel.

[0013] Optionally, the groove of the second U-shaped keel is further provided with a heat insulation pad, and the heat insulation pad is located below the heater.

[0014] Optionally, the box further comprises a plurality of top U-shaped keels and a plurality of bottom U-shaped keels, the plurality of top U-shaped keels are linearly arranged along the airflow direction S on the inner top of the box, the plurality of bottom U-shaped keels are linearly arranged along the airflow direction S on the inner bottom of the box, the top U-shaped keels and the bottom U-shaped keels are both perpendicular to the airflow direction S and longitudinally aligned, at least one of the top U-shaped keels and the bottom U-shaped keels comprises a baffle, the electric field is longitudinally clamped between the top U-shaped keels and the bottom U-shaped keels, and the electric field is embedded in the gap of the baffle of the adjacent top U-shaped keel and / or bottom U-shaped keel on both sides of the electric field, the baffle is used to prevent the electric field from sliding along the airflow direction S.

[0015] Optionally, the purification box further comprises a filter plate, the top U-shaped keel located on the outer side of the plurality of top U-shaped keels further comprises a first downwardly opening groove 1104; and / or

[0016] the bottom U-shaped keel located on the outer side of the plurality of bottom U-shaped keels further comprises a second upwardly opening groove 1105, the first groove 1104 and the second groove 1105 are oppositely arranged, and the filter plate is arranged in the first groove 1104 and / or the second groove 1105.

[0017] The utility model also provides a kind of range hood, comprising the range hood electrostatic purifier of any one of preceding description. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numbers represent the same parts.

[0020] Figure 1 It is a structure schematic view of the range hood electrostatic purifier of an embodiment of the present application.

[0021] Figure 2 It is an explosion structure schematic view of the range hood electrostatic purifier of an embodiment of the present application.

[0022] Figure 3 It is an explosion structure schematic view of the purification box of the range hood electrostatic purifier of an embodiment of the present application.

[0023] Figure 4Part structure diagram of the electrostatic precipitator of the range hood according to an embodiment of the present application;

[0024] Figure 5 Part structure diagram of the electrostatic precipitator of the range hood according to an embodiment of the present application; Figure 1 Enlarged diagram of V1 part;

[0025] Figure 6 Top view diagram of the electric field of the electrostatic precipitator of the range hood according to an embodiment of the present application;

[0026] Figure 7 Front view diagram of the electric field of the electrostatic precipitator of the range hood according to an embodiment of the present application;

[0027] Figure 8 Three-dimensional diagram of the electric field of the electrostatic precipitator of the range hood according to an embodiment of the present application;

[0028] Figure 9 Part structure diagram of the electrostatic precipitator of the range hood according to an embodiment of the present application; Figure 8 Enlarged diagram of V2 part;

[0029] Figure 10 Right view diagram of the electric field of the electrostatic precipitator of the range hood according to an embodiment of the present application;

[0030] Figure 11 Part structure diagram of the electrostatic precipitator of the range hood according to an embodiment of the present application;

[0031] Figure 12 Part structure diagram of the electrostatic precipitator of the range hood according to an embodiment of the present application; Figure 1 Enlarged diagram of V3 part. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] With reference to the drawings, the electrostatic precipitator of the range hood described in the embodiments includes a purification box 1 and an electric control box 2, wherein the purification box 1 includes a box body 11, an electric field 12 and a spraying assembly 13.

[0034] The box body 11 is in the shape of a square as a whole, and the box body 11 can also be in other shapes, such as a circle, etc. The box body 11 is enclosed by a rear plate 11-1, an upper plate 11-2, a lower plate 11-4, a left vertical column 11-3 and a right vertical column 11-5, and the inside is hollow. The connection modes of the rear plate 11-1, the upper plate 11-2, the lower plate 11-4, the left vertical column 11-3 and the right vertical column 11-5 include but are not limited to welding, bolt connection, riveting and clamping, etc. In actual application scenarios, different factors such as the use environment of the purification box 1, the expected bearing pressure, the manufacturing cost and the post-maintenance demand, etc. can be flexibly selected to meet the needs of the connection mode. For example, if the purification box 1 is used in an industrial environment with strong vibration, the welding mode can provide stronger structural stability; if frequent disassembly and maintenance are required, bolt connection is more suitable.

[0035] The left side of the box body 11 is provided with an air inlet 111, and the right side is provided with an air outlet 112, which are oppositely arranged. In actual application, the gas enters the inside of the box body 11 through the left air inlet 111, and is discharged from the right air outlet 112 after purification treatment. In order to realize the airflow direction S, an air exhaust fan can be installed at the air outlet 112 to exhaust the gas in the box body 11 by using the negative pressure generated by the fan, so as to form the airflow direction S. In addition to the air exhaust fan at the air outlet 112, an air supply fan can also be installed at the front end of the air inlet 111 to actively press the gas into the box body 11, which cooperates with the air exhaust fan at the air outlet 112 to further enhance and stabilize the airflow direction S, and at the same time, the gas treatment efficiency can be improved.

[0036] In some embodiments, a sealing strip (not shown in the figure) can also be installed at the connection of the rear plate 11-1, the upper plate 11-2, the lower plate 11-4, the left vertical column 11-3 and the right vertical column 11-5, to ensure that the gas can only enter from the air inlet 111 and be discharged from the air outlet 112, avoiding the disorder of the airflow direction S caused by leakage.

[0037] In some embodiments, the four peripheral edges of the air inlet 111 are provided with recesses C1 extending inwardly into the interior of the cabinet 11, which are distributed along the profile of the air inlet 111 to form an annular groove. The air outlet 112 is designed with the same structure as the air inlet 111, and also has an annular groove recessed inwardly on its edge. In actual application scenarios, when the range hood electrostatic purifier of the present embodiment needs to be connected with other components (such as a fan module, a connecting cover, etc.), the recess C1 structure can be used to achieve quick assembly. The corresponding connection end of the other components is designed as a protruding structure matching the shape of the recess C1, and by directly inserting the protruding structure into the recess C1 of the air inlet 111 or the air outlet 112, the preliminary positioning can be completed. Since the recess C1 and the protruding structure are tightly fitted, the relative displacement between the components can be effectively limited, and only by a simple plug-in action, without the need for additional complex fixing devices, a stable connection can be achieved, greatly improving the installation efficiency and connection stability. At the same time, this structure design can also enhance the sealing performance of the connection to some extent, preventing gas leakage.

[0038] In other embodiments, the air outlet 112 can also be designed as a protrusion different from the recess C1 of the air inlet 111, which matches the recess C1 of the air inlet 111, i.e., the profile of the protrusion completely fits the shape of the inner wall of the recess of the air inlet 111, and can be tightly nested.

[0039] In actual application, when secondary purification is required, the protrusion of the air outlet of one range hood electrostatic purifier can be directly inserted into the recess of the air inlet of another purifier, and the precise engagement of the recess and protrusion structure can achieve quick assembly. This design utilizes the interlocking principle of mechanical structure, without the need for additional bolts or buckles, to ensure the stability and sealing performance of the connection, effectively preventing gas leakage. By connecting multiple purifiers in series, the gas needs to pass through the electric field and spray assembly of each device for purification. After the preliminary purification in the first-stage purifier, the residual pollutants will be further removed in the second-stage purifier, thereby significantly improving the overall purification efficiency. This modular design not only facilitates the installation and disassembly of the equipment, but also allows flexible adjustment of the number of purifiers in series according to actual needs, meeting the purification needs in different scenarios.

[0040] The spraying assembly 13 is installed on the top of the box 11 and includes a longitudinal main pipe 132, a plurality of spray heads 133 (16 in this embodiment) and a plurality of transverse branch pipes 134 (4 in this embodiment). The four transverse branch pipes 134 are arranged in parallel and equidistant, and are in orthogonal communication with the longitudinal main pipe 132. The 16 spray heads 133 are arranged in an array on each transverse branch pipe 134. Each spray head 133 is a wide-angle fan-shaped spray head. The spray angle of the spray head 133 ensures that the spray areas of adjacent spray heads 133 can overlap with each other, avoiding the occurrence of cleaning blind areas. The spray hole of the spray head 133 adopts a tapered design, and the aperture gradually decreases from the inlet to the outlet, so that the water flow forms a high-speed water jet when sprayed, thereby enhancing the flushing force on the oil stains on the components of the electric field 12 and the internal surface of the box 11.

[0041] The spraying assembly 13 is provided with a water inlet connector 131 arranged on the longitudinal main pipe 132. A circular water inlet through hole is formed in the upper plate 11-2 of the box 11 corresponding to the position of the spraying assembly 13. The diameter of the water inlet through hole is slightly larger than the outer diameter of the water inlet connector 131, so as to ensure that the water inlet connector 131 can smoothly pass through. In order to prevent water leakage, a sealing rubber ring can be arranged between the water inlet through hole and the water inlet connector 131. The rubber ring is tightly sleeved on the water inlet connector 131. When the water inlet connector 131 passes through the water inlet through hole, the rubber ring is pressed between the edge of the water inlet through hole and the water inlet connector 131, forming a sealing structure. The water inlet connector 131 of the spraying assembly 13 can be made of corrosion-resistant metal material. One end of the water inlet connector 131 is connected with the longitudinal main pipe 132, and the other end extends to the outside of the box 11 through the water inlet through hole and is connected with the external water source pipe. The water inlet connector 131 can be provided with external threads to facilitate connection with the external water source pipe. A manual stop valve can also be installed on the water inlet connector 131 to facilitate cutting off the water source during equipment maintenance or repair, thereby avoiding water leakage.

[0042] Through the above design, the orthogonal communication layout of the longitudinal main pipe and the transverse branch pipe forms a three-dimensional water flow delivery network, which can uniformly distribute water flow to each area inside the box. Whether it is the pole plate, the electrode of the electric field, or the side wall, the top and the bottom of the box, they can all be fully covered by the water flow, greatly improving the coverage rate of cleaning and ensuring that there is no oil stain remaining dead angle. Secondly, the array arrangement of the spray heads and the wide-angle fan-shaped spray design, combined with the tapered structure of the spray hole, make the water flow form a fan-shaped water curtain with strong impact force after being sprayed. These water curtains can quickly impact and soak the oil stains attached to the surface of the components, effectively loosen and peel off the oil stains by using the impact force and soaking effect of the water flow, thereby significantly improving the cleaning efficiency.

[0043] In addition, the bottom of the box 11 is provided with a drain (not shown in the figure), which is connected to a drainage pipeline that discharges sewage into a designated sewage treatment system. The pipe diameter of the drain is designed according to the actual drainage requirements to ensure that the sewage generated after spraying can be quickly discharged. The bottom of the box 11 can also be designed to be funnel-shaped and inclined towards the center, with the drain located at the lowest point. A removable filter screen can also be installed at the drain to intercept solid impurities in the sewage and prevent the drainage pipeline from being clogged.

[0044] The electric field 12 is located inside the box 11 and can be composed of multiple components, with one in this embodiment. The electric field 12 includes an ionization zone 121, an adsorption zone 122, a frame 123, and an insulating support 124.

[0045] The ionization zone 121 is mainly responsible for ionizing and charging the oil fume particles, laying the foundation for the subsequent adsorption process. Its specific structure includes a first wiring terminal 1211, a first connecting rod 1212, an electrode 1213, a first grounding terminal 1216, a second connecting rod 1215, and a second electrode plate 1214.

[0046] The main function of the adsorption zone 122 is to adsorb and collect ionized oil fume particles, thereby achieving the purification of oil fume. Its structure includes a second wiring terminal 1225, a third connecting rod 1222, a third electrode plate 1221, a second grounding terminal 1226, a fourth connecting rod 1224, and a fourth electrode plate 1223.

[0047] The frame 123 is in the shape of a square overall, including a border 1231, a grounding frame 1235, a first high-voltage frame 1233, and a second high-voltage frame 1234.

[0048] The insulating support 124 is made of materials with good insulating properties and high mechanical strength, such as ceramics, glass fibers, etc., to prevent electrical short circuits and leakage. The insulating support 124 is located between the second high-voltage frame 1234 and the grounding frame 1235, as well as between the first high-voltage frame 1233 and the grounding frame 1235. The insulating support 124 is used to fix the first high-voltage frame 1233 and the second high-voltage frame 1234, and to insulate the first high-voltage frame 1233 and the second high-voltage frame 1234 from the grounding frame 1235.

[0049] The first wiring terminal 1211 includes two terminals, which are symmetrically arranged at the upper and lower ends of the first high-voltage frame 1233. They serve as access points for connecting external high-voltage power sources, ensuring that the current can be stably transmitted to the components of the ionization zone 121.

[0050] The first connecting rod 1212 includes two symmetrical rod structures distributed above and below the frame 123. The upper first connecting rod 1212 passes through the first through hole 1232 in the upper part of the grounding frame 1235 and is connected with the first connecting terminal 1211 at the upper end of the first high-voltage frame 1233. The lower first connecting rod 1212 passes through the first through hole 1232 in the lower part of the grounding frame 1235 and is connected with the first connecting terminal 1211 at the lower end of the first high-voltage frame 1233. A group of electrodes 1213 are distributed at equal intervals on each first connecting rod 1212. The electrodes 1213 can be made of tungsten wire or molybdenum wire, which have high melting points and good electrical conductivity. Under the action of the high-voltage electric field 12, the electrodes 1213 can ionize the surrounding air to generate a large number of free electrons and ions.

[0051] The first grounding terminal 1216 includes two symmetrical terminals distributed at the upper and lower ends of the ionization area 121 of the grounding frame 1235, which serves as the grounding interface of the ionization area 121. Its function is to ground the second electrode plate 1214 to form a stable electric field 12 loop.

[0052] The second connecting rod 1215 includes two symmetrical rod structures distributed above and below the frame 123. The upper second connecting rod 1215 passes through the grounding frame 1235 and is connected with the first grounding terminal 1216 at the upper end of the ionization area 121 of the grounding frame 1235. The lower second connecting rod 1215 passes through the grounding frame 1235 and is connected with the first connecting terminal 1211 at the lower end of the ionization area 121 of the grounding frame 1235. A group of second electrode plates 1214 are distributed at equal intervals on the second connecting rod 1215, so that the second electrode plates 1214 can be grounded.

[0053] The second connecting terminal 1225 includes four symmetrical terminals distributed at the upper and lower ends of the second high-voltage frame 1234, which serves as the access point of the external low-voltage power supply to provide a stable electric field 12 for the adsorption area 122.

[0054] The second grounding terminal 1226 is arranged at the lower end of the adsorption area 122 of the grounding frame 1235, which serves as the grounding interface of the adsorption area 122. It introduces the charges generated in the adsorption area 122 into the ground to ensure the safe operation of the equipment.

[0055] The third connecting rods 1222 are four in total, two of which are located on the upper part of the frame 123, and the other two are symmetrically arranged on the lower part of the frame 123. The two ends of the upper third connecting rod 1222 pass through the second through hole 1236 opened on the upper part of the grounding frame 1235 and are connected with the second wiring terminal 1225 on the upper end of the second high-voltage frame 1234. The two ends of the lower third connecting rod 1222 pass through the second through hole 1236 opened on the lower part of the grounding frame 1235 and are connected with the second wiring terminal 1225 on the lower end of the second high-voltage frame 1234. A set of third polar plates 1221 are distributed at equal intervals on the third connecting rod 1222, and the third connecting rod 1222 is used to transmit current to the third polar plate 1221.

[0056] The fourth connecting rod 1224 includes six rods, three of which are located on the left side of the adsorption area 122, and the other three are located on the right side of the adsorption area 122. The three on the left side are located at the upper left end, the middle left side and the lower right end of the adsorption area 122, respectively. The three on the right side are located at the upper right end, the middle right side and the lower right end of the adsorption area 122, respectively. A set of fourth polar plates 1223 are distributed at equal intervals on the fourth connecting rod 1224, and the six fourth connecting rods 1224 are connected with the second grounding terminal 1226, so that the fourth polar plate 1223 can be grounded to form a stable electric field 12 loop.

[0057] The third polar plate 1221 and the fourth polar plate 1223 are arranged in parallel with each other, and the third polar plate 1221 and the fourth polar plate 1223 are arranged alternately to form a uniform electric field 12, so that the charged oil fume particles can move directionally under the action of the electric field 12 force and be adsorbed on the surface of the polar plate.

[0058] The frame 123 is in the shape of a square as a whole, including a frame 1231, a grounding frame 1235, a first high-voltage frame 1233 and a second high-voltage frame 1234.

[0059] The frame 1231 is four in total and in the shape of a long strip. The cross section of each frame 1231 is in the shape of L and is located at the upper left edge, the upper right edge, the lower left edge and the lower right edge of the frame 123, respectively. The two ends of the frame 1231 are connected with a grounding frame 1235 respectively to form a frame structure. The inner part of the frame 1231 located at the upper right edge and the lower right edge is provided with a fourth connecting rod 1224, respectively.

[0060] The grounding frame 1235 includes two grounding frames 1235 arranged symmetrically on the front and rear parts of the frame 123. Each grounding frame 1235 is provided with one first through hole 1232 and two second through holes 1236 above and below in the ionization area 121 and the adsorption area 122, respectively. These through holes provide a channel for the first connecting rod 1212 and the third connecting rod 1222 to pass through, and at the same time ensure that a certain gap is maintained between the first connecting rod 1212 and the first through hole 1232, and between the third connecting rod 1222 and the second through hole 1236, to avoid electrical short circuit.

[0061] The first high-voltage frame 1233 and the second high-voltage frame 1234 each include two symmetrically distributed on the front and rear of the frame body 123, and are fixed to the grounding frame 1235 through the insulating support 124. The upper and lower ends of the first high-voltage frame 1233 are provided with the first wiring terminal 1211, and the upper and lower ends of the second high-voltage frame 1234 are each provided with two second wiring terminals 1225, which provide high-voltage and low-voltage power supply for the ionization area 121 and the adsorption area 122, respectively.

[0062] In the actual oil fume purification application, the electric field of the embodiment is arranged along the airflow direction of the ionization area and the adsorption area, and the power supply is connected and the system is controlled through the electric control box. The electric control box transmits the external high-voltage power supply to the first wiring terminal, the first wiring terminal is connected with the first connecting rod, the first connecting rod is distributed with electrodes, the first grounding terminal is connected with the second connecting rod, the second connecting rod is distributed with the second electrode plate, the current is conducted to the electrode through the first connecting rod, and a strong electric field is formed between the electrode and the grounded second electrode plate. Under the action of the strong electric field, the air around the electrode is ionized to generate a large number of free electrons and positive ions. When the oil fume particles enter the ionization area, they will collide with these free electrons and positive ions. The oil fume particles are more likely to capture free electrons, thereby being charged. Subsequently, the charged oil fume particles enter the adsorption area with the airflow. In the adsorption area, the electric control box connects the low-voltage power supply to the second wiring terminal, the second wiring terminal is connected with the third connecting rod, the third connecting rod is distributed with the third electrode plate; the second grounding terminal is connected with the fourth connecting rod, and the fourth connecting rod is distributed with the fourth electrode plate. After the second wiring terminal is connected with the low-voltage power supply, the third electrode plate is connected with negative low-voltage, the fourth electrode plate is grounded, and a stable low-voltage electric field is formed between the third electrode plate and the fourth electrode plate. The oil fume particles with negative charge are subjected to the action of the electric field force in the electric field, move to the fourth electrode plate with positive charge (grounding relative to the third electrode plate), and are adsorbed on the surface of the fourth electrode plate; at the same time, the third electrode plate also adsorbs a part of the particles with negative charge. Since the third electrode plate and the fourth electrode plate are arranged in parallel and alternately, a uniform electric field is formed, so that the charged oil fume particles can orderly move to the electrode plate under the action of the electric field force and be adsorbed, thereby realizing the collection of the oil fume particles and achieving the purpose of purifying the oil fume.

[0063] The four side frames of the frame body constitute a cubic frame, and the two ends are connected with the front and rear grounding frames to provide mechanical support and fixing effect for the entire electric field structure. The first through hole and the second through hole opened on the grounding frame provide a through channel for the first connecting rod and the third connecting rod, respectively, and maintain the gap between the connecting rod and the through hole to prevent electrical short circuit.

[0064] The first high-voltage frame and the second high-voltage frame are fixed to the grounding frame through the insulating support, and the insulating support is made of insulating materials such as ceramic and glass fiber, which not only provides support for the high-voltage frame, but also effectively isolates the high-voltage frame from the grounding frame to prevent electrical short circuit and leakage phenomenon, and ensures the safe and stable operation of the electric field structure.

[0065] The principle and beneficial effects of the range hood electrostatic purifier of the embodiment are as follows: the range hood electrostatic purifier comprises a purification box and an electric control box. The box body in the purification box serves as an overall bearing frame, and its internal hollow space accommodates key components such as an electric field and a spraying assembly. The purification box relies on the electric field to bear the purification function and relies on the spraying assembly to bear the cleaning function. The electric control box is responsible for power supply and electric field state control. Although it does not directly participate in the cleaning process, it ensures that the electric field is powered off to ensure cleaning safety.

[0066] Before starting the cleaning process of the range hood electrostatic purifier, the electric field power is first turned off through the electric control box. The electric control box, as the power control center of the entire device, is electrically connected with the electric field and has the function of controlling the power supply state of the electric field. Turning off the power effectively avoids safety risks such as short circuit and electric leakage caused by water flow contacting charged components during the cleaning process, and also protects the electric field components from damage caused by water and electricity contact, laying a safe foundation for subsequent cleaning work.

[0067] After the cleaning work is started, the external water source enters the spraying assembly through the water inlet joint extending to the outside of the box body and flows to the spray head. The spray head sprays the water flow in the space inside the box body. The sprayed water flow acts on the electric field in the box body. The electric field includes electrodes and plates. During the oil fume purification process, a large amount of oil stains, particulate matter and other impurities will be adsorbed on the surface of these components. The water flow uses its impact force and infiltration effect to loosen the adhered pollutants by directly flushing the surface of the electric field with impact force, and to promote the oil stains to fall off from the surface of the electric field by reducing the adhesion between the oil stains and the surface of the electric field. At the same time, the water flow also flushes the areas such as the side wall and the top of the box body, and flushes down the oil stains deposited in these parts. The oil stains and impurities flushed down by the water flow are mixed with the water flow to form sewage, which flows downward along the wall surface inside the box body and the surface of the electric field components under the action of gravity, and finally converges at the bottom of the box body. The drain is arranged at the lowest position of the bottom of the box body, and the sewage is discharged from the box body through the drain, completing the entire cleaning process and restoring the electric field and other components inside the purifier to a clean state, preparing for subsequent efficient operation.

[0068] During the entire cleaning process, the components cooperate with each other. The spray assembly strips the pollutants adsorbed on the electric field plate, the electrode and the inside of the box by water flushing, effectively avoids the continuous accumulation of pollutants to hinder the normal charge conduction of the electric field, prevents the change of electrode discharge characteristics, thereby maintains the stable purification efficiency of the electric field; at the same time, timely removal of pollutants can avoid the corrosion of the electrode plate and the electrode by acidic substances and moisture in the oil fume, ensure the safe operation of the electric field; the box provides a containing space and a water flow channel for the cleaning process, ensuring that the water flow can fully cover the area to be cleaned; the drain port timely discharges sewage, and the components cooperate with each other to realize the overall cleaning of the inside of the purifier, so that the key components such as the electric field can restore to a clean state, thereby ensuring that the purifier can run with high efficiency and stability, effectively prolonging the service life of the equipment and reducing the risk of faults and safety accidents caused by the accumulation of pollutants.

[0069] In some embodiments, the box 11 of the purification box 1 also includes an access opening 113 with a hatch 114, and the hatch 114 is formed by the shell of the electric control box 2.

[0070] During the operation of the oil fume electrostatic purifier, the electric field components may have problems such as decreased purification efficiency, component corrosion, and even short circuit due to continuous adsorption of oil fume particles and dust. The oil fume electrostatic purifier is provided with an access opening with a hatch, and the hatch is formed by the shell of the electric control box, which not only ensures the overall sealing and protection performance of the electric control box, but also enables the hatch to be quickly and conveniently opened when maintenance is needed, forming a channel directly to the key components such as the electric field inside the box. This design effectively saves equipment space, avoids the impact of additional maintenance structures on the overall layout of the purifier, and makes the equipment structure more compact and reasonable. In addition, the existence of the access opening also facilitates daily equipment maintenance and maintenance work. The staff can regularly check the inside of the purifier through the access opening, clean the remaining oil stains and dust, check the connection of each component, and ensure the stability and safety of the equipment operation.

[0071] In some embodiments, based on the foregoing embodiments, the oil fume electrostatic purifier further includes a hinge 3 arranged on the outer surface of the box 11 and the shell of the electric control box 2.

[0072] In this embodiment, the hinge provides significant advantages for the opening and closing operation of the hatch. When the hatch is opened, the stable support provided by the hinge enables the hatch to remain in a hovering state at any angle without the need for additional support devices, facilitating the maintenance operation of the staff with both hands. When checking the dust accumulation of the electric field plate, the staff can easily adjust the angle of the hatch to obtain the best operating view and space. When the hatch is closed, the hinge's reset feature can ensure that the hatch is accurately reset and tightly fitted with the box, cooperating with the sealing strip to form a good sealing effect, preventing oil fume, moisture and other substances from entering the inside of the electric control box, protecting the circuit elements from damage, and maintaining the electrical safety performance of the equipment.

[0073] In some embodiments, based on the foregoing embodiments, the box body 11 of the purification tank 1 further comprises a protrusion 115, and a groove is arranged on the shell of the electric control box 2.

[0074] In this embodiment, by arranging the protrusion and the groove, when the access door is closed, the box body protrusion is accurately embedded in the groove of the electric control box shell, providing mechanical connection force between the box body and the electric control box, and enhancing the stability of the overall structure of the equipment. Even in the case of vibration generated by long-term operation of the purifier, or external force impact during transportation, the close fit of the protrusion and the groove can prevent relative displacement between the box body and the electric control box, ensure the position stability of the internal components of the equipment, and reduce the risk of failure caused by loose components.

[0075] In some embodiments, the box body 11 of the range hood electrostatic purifier further comprises a first U-shaped keel 116, which is composed of a first top plate 1164, two oppositely arranged first side plates 1163, and two first wing plates 1162 vertically extending outward from the ends of the first side plates 1163. The two first side plates 1163 are symmetrically distributed on both sides of the first top plate 1164, reserving installation space for the horizontal branch pipe 134. The first U-shaped keel 116 is fixed to the inner top of the box body 11, i.e., the inner side of the upper plate 11-2 of the box body 11, through the first wing plates 1162. The first wing plates 1162 can be provided with mounting holes for direct nailing or bolting to the inner top of the box body 11. The first wing plates 1162 are also provided with positioning grooves 1161, which extend towards the first side plates 1163 and penetrate into part of the area of the first side plates 1163, forming a continuous U-shaped clamping groove structure. The horizontal branch pipe 134 is embedded in the positioning groove 1161, which is used for limiting and supporting the horizontal branch pipe 134. In some embodiments, the size of the positioning groove 1161 is designed to have an interference fit with the outer diameter of the horizontal branch pipe 134, so that the horizontal branch pipe 134 can be stably limited and supported without additional fixing parts, preventing displacement or shaking of the pipe during water flow impact or equipment operation vibration.

[0076] In this embodiment, by arranging the first U-shaped keel on the inner top of the box body of the range hood electrostatic purifier, stable support is provided for the horizontal branch pipe of the spray assembly, effectively dispersing the force generated by the spray assembly and water flow, and at the same time enhancing the overall structural strength of the box body to avoid local deformation of the box body under stress.

[0077] In other embodiments, the spray assembly can also be fixed to the top of the box in a suspended manner. A plurality of eye bolts are arranged on the top of the box and are fixed to the outer side of the upper plate of the box by welding or riveting. The screw part of the eye bolt extends into the box through the insertion hole reserved on the upper plate of the box, and a shock-absorbing rubber washer is sleeved on the screw to reduce the vibration generated during the operation of the spray assembly. A plurality of connecting ear plates adapted to the eye bolts are welded on the longitudinal main pipe of the spray assembly, and bolt holes are arranged on the ear plates. During installation, the connecting ear plates are sleeved on the screw of the eye bolt, and are fixed by screwing the nut, so that the spray assembly is suspended in the box. This way can make full use of the space on the top of the box, and the spray assembly is in a suspended state. Under the impact of water flow, part of the vibration can be absorbed by the shock-absorbing washer, avoiding stress concentration caused by rigid connection, and facilitating disassembly and adjustment of the spray assembly.

[0078] In some embodiments, the box 11 of the range hood electrostatic precipitator further comprises a heater 117 and a plurality of second U-shaped keels 118 (three in this embodiment). The second U-shaped keel 118 comprises a second top plate 1183, two oppositely arranged second side plates 1182, and two second wing plates 1181 extending outwardly and perpendicularly from the ends of the second side plates 1182. The two second side plates 1182 are symmetrically distributed on both sides of the second top plate 1183 and are connected perpendicularly thereto. The electric field 12 is located on the second top plate 1183, and the second top plate 1183 serves as a bearing surface to provide support for the electric field 12.

[0079] The second U-shaped keel 118 is fixed to the inner bottom of the box 11, i.e., the inner side of the lower plate 11-4 of the box 11, by the second wing plates 1181. Installation holes can be arranged on the second wing plates 1181 to facilitate direct nailing or bolting to the inner bottom of the box 11.

[0080] Each second U-shaped keel 118 is perpendicular to the airflow direction S, and three second U-shaped keels 118 are linearly arranged on the inner bottom of the box body 11 along the airflow direction S. This layout design creates favorable conditions for the expansion installation of the electric field 12, and the three second U-shaped keels 118 construct two independent installation spaces on the inner bottom of the box body 11. In this embodiment, in addition to the installed electric field 12, another electric field 12 can be additionally installed at the corresponding position on the left side of the installed electric field 12. The two electric fields 12 are arranged side by side in sequence according to the airflow direction S, forming a series purification structure. When the oil fume flows through the box body 11, it will pass through the two electric fields 12 in sequence. In the first electric field 12, most of the oil fume particles are ionized and adsorbed, and the remaining fine particles and a small amount of oil fume that has not been completely treated will again receive ionization and adsorption treatment after entering the second electric field 12. This double-electric-field side-by-side layout significantly improves the purification efficiency of the oil fume by increasing the contact area and processing times of the oil fume with the electric field, and can more thoroughly remove pollutants in the oil fume, meeting the strict requirements of the kitchen environment for high-quality oil fume purification.

[0081] The heater 117 is used to heat the electric field 12, and the heater 117 is electrically connected with the electric control box 2. The heater 117 is located in the groove of the second U-shaped keel 118, and the groove of the second U-shaped keel 118 is surrounded by the second side plate 1182 and the second top plate 1183.

[0082] In this embodiment, the heater is located in the groove of the second U-shaped keel. On the one hand, the groove surrounded by the second side plate and the second top plate of the second U-shaped keel provides installation space for the heater, effectively avoiding displacement of the heater due to vibration during equipment operation. The second U-shaped keel also provides physical protection for the heater, preventing oil fume, dust and other pollutants from directly adhering to the surface of the heater, reducing the failure probability of the heater and prolonging its service life. At the same time, the heater is prevented from directly contacting the electric field components, preventing electrical interference or damage to the heater caused by the strong electric field and high-voltage environment of the electric field. On the other hand, the electric field is located on the second top plate of the second U-shaped keel, and the heat generated by the heater can be quickly and uniformly conducted to the electric field components through the second top plate, achieving efficient heating of the electric field. By heating the electric field, the adhesion of oil stains on the surface of the electrode plate or motor and other components can be effectively reduced, making it easier for the attached oil stains to be washed away by the water flow during the spray cleaning process. At the same time, the phenomenon of oil fume condensation caused by low temperature can be reduced, the ionization and adsorption efficiency of the electric field on the oil fume particles can be improved, and the purification performance of the entire purifier can be enhanced.

[0083] In other embodiments, the heater can also be integrated on the pole plate of the electric field. By integrating the heater on the pole plate, the heat is transferred "zero distance". The pole plate itself generates heat, which can shorten the heating time and make the pole plate reach the ideal working temperature in a very short time, reduce the viscosity of the oil stains, enhance the ionization and adsorption efficiency of the electric field on the oil smoke particles, and avoid the problem of poor initial purification effect caused by slow preheating.

[0084] In this embodiment, the electric control box also has an intelligent control function. The implementation of this function is a prior art content, which will not be described here. During the operation of the range hood electrostatic purifier, when the electric control box detects that the electric field operation time reaches the preset automatic cleaning period, the automatic cleaning program is started. First, the electric control box sends a heating instruction to the heater. Since the heater is located in the groove formed by the second U-shaped keel surrounded by the second side plate and the second top plate, and is closely associated with the electric field components through the second top plate, the heat generated by the heater can be quickly and uniformly transmitted to the electric field. A temperature sensor can be provided in the electric field. During the heating process, the electric control box monitors the working state of the heater and the temperature of the electric field in real time. Through the data feedback of the temperature sensor, the heating power is dynamically adjusted to ensure that the temperature of the electric field gradually rises to the set cleaning temperature. After the electric field heating is completed, the electric control box controls the spray assembly to start immediately. The longitudinal main pipe of the spray assembly is connected to the external water source through the water inlet joint. The electric control box controls the stop valve to open. The water flows through the longitudinal main pipe and is distributed to multiple transverse branch pipes, and finally is sprayed out from the array of spray heads. The spray head adopts a wide-angle fan design, and the water flow formed by the spray forms a large-area water curtain, which uniformly covers the electric field and the corners of the box body. Since the heating link has reduced the viscosity of the oil stains, the water flow can more easily flush the surface of the pole plate and the electrode, quickly stripping the oil stains. The sewage mixed with the oil stains flows to the drain at the bottom of the box body under the action of gravity, and is discharged from the box body. After the spray cleaning is completed, the electric control box controls the heater to start again. The second U-shaped keel acts as a heat conduction structure to continuously transfer heat to the electric field and accelerate the evaporation of residual moisture. A humidity sensor can be provided in the electric field. The electric control box can also accurately control the drying time and temperature according to the data feedback of the humidity sensor, to avoid damage to the equipment caused by excessive drying. When the surface humidity of the electric field components is detected to be within a safe range, the electric control box automatically turns off the heater, and the entire automatic cleaning process is completed. The electric field returns to the normal working state.

[0085] This automatic heating-spraying-drying work flow has many obvious advantages. From the efficiency level, the whole process does not need manual intervention, and is automatically monitored and controlled by the electric control box, greatly saving the labor cost, shortening the equipment cleaning and maintenance time, reducing the equipment downtime, and ensuring the continuity of the oil fume purification work. In terms of cleaning effect, the heating link softens the oil stains in advance, and cooperates with the strong flushing of the spraying assembly, which can more thoroughly remove stubborn oil stains on the surface of the electric field components, avoiding the problem of incomplete cleaning caused by difficult removal of oil stains in the traditional cleaning method. The drying link effectively avoids water residue, prevents equipment from causing electrical faults or component corrosion due to moisture, and prolongs the service life of the equipment.

[0086] In some embodiments, based on the foregoing embodiments, a heat insulation pad 119 is further arranged in the groove of the second U-shaped keel 118, and the heat insulation pad 119 is located below the heater 117. The heat insulation pad 119 is made of a material with high temperature resistance and low thermal conductivity, such as ceramic fiber felt or aerogel composite material. These materials can effectively block the heat generated by the heater 117 from being conducted to the bottom of the box body 11.

[0087] In this embodiment, by arranging the heat insulation pad below the heater, when the heater is working, the heat can be prevented from being transmitted to the lower plate of the box body, causing the temperature of the bottom of the box body to rise, and further causing the aging and deformation of the box body material, or causing adverse effects on other components at the bottom of the box body, such as causing the sealing rubber strip to lose elasticity due to high temperature, reducing the sealing performance of the box body. The presence of the heat insulation pad, like a solid "heat shield", greatly reduces the heat loss and the spread of heat in other directions, so that more heat generated by the heater is conducted to the electric field 12 components through the second top plate of the second U-shaped keel.

[0088] In some embodiments, the box body 11 of the range hood electrostatic precipitator further comprises a plurality of top U-shaped keels 1101 and a plurality of bottom U-shaped keels 1102. In this embodiment, the top U-shaped keels 1101 and the bottom U-shaped keels 1102 are both 3.

[0089] In embodiments where the second U-shaped keel 118 and the bottom U-shaped keel 1102 exist at the same time, the second U-shaped keel 118 and the bottom U-shaped keel 1102 can be the same component and have the same structure. In embodiments where the first U-shaped keel 116 and the top U-shaped keel 1101 exist at the same time, the first U-shaped keel 116 can be one of the plurality of top U-shaped keels 1101. In this embodiment, the second U-shaped keel 118 and the bottom U-shaped keel 1102 are the same component, and the first U-shaped keel 116 is the middle one of the 3 bottom U-shaped keels 1102.

[0090] The three top U-shaped keels 1101 are linearly arranged on the inner top of the box 11 along the airflow direction S, and the three bottom U-shaped keels 1102 are linearly arranged on the inner bottom of the box 11 along the airflow direction S. The top U-shaped keels 1101 and the bottom U-shaped keels 1102 are perpendicular to the airflow direction S and longitudinally aligned, that is, the three top U-shaped keels 1101 and the three bottom U-shaped keels 1102 are longitudinally in one-to-one correspondence.

[0091] The top U-shaped keels 1101 and the bottom U-shaped keels 1102 include baffles 1103. The baffles 1103 on the top U-shaped keels 1101 extend towards the bottom U-shaped keels 1102, and the baffles 1103 on the bottom U-shaped keels 1102 extend towards the top U-shaped keels 1101. The electric field 12 is longitudinally clamped between the top U-shaped keels 1101 and the bottom U-shaped keels 1102, with its upper end embedded in the gap formed by the baffles 1103 of the adjacent top U-shaped keels 1101 and its lower end embedded in the gap between the baffles 1103 of the adjacent bottom U-shaped keels 1102. The spacing between the adjacent baffles 1103 can be adjusted according to the size of the electric field 12. This embedded clamping design can effectively prevent the electric field 12 from sliding along the airflow direction S under the action of airflow impact or equipment vibration, and ensure that the electric field 12 maintains a stable position and posture during operation.

[0092] In this embodiment, the longitudinal alignment of the top U-shaped keels and the bottom U-shaped keels forms a vertical constraint system, and the baffles form a horizontal constraint system, fixing the electric field inside the box and enhancing the anti-vibration and anti-impact ability of the electric field. In addition, this modular keel design has high universality. In different models or sizes of purifiers, only the specifications and number of keels need to be adjusted to adapt to electric fields of different sizes, reducing the production cost of the product.

[0093] In other embodiments, the baffles 1103 of the top U-shaped keels 1101 and the bottom U-shaped keels 1102 have flexibility in configuration. In some embodiments, only one of them is provided with a baffle 1103. When the top U-shaped keel 1101 is provided with a baffle 1103, the upper end of the electric field 12 is embedded in the gap formed by the baffles 1103 of the adjacent top U-shaped keels 1101, and the lower end is stabilized by being attached to the bottom U-shaped keel 1102. Conversely, when the bottom U-shaped keel 1102 is provided with a baffle 1103, the lower end of the electric field 12 is embedded in the gap between the baffles 1103 of the adjacent bottom U-shaped keels 1102, and the upper end is fixed by being attached to the top U-shaped keel 1101. This flexible design can provide diversified solutions according to different product design requirements, cost control requirements and installation space limitations, further improving the market adaptability and competitiveness of the product.

[0094] In some embodiments, based on the foregoing embodiments, the purification tank 1 further comprises a filter plate 14, two of the three top U-shaped keels 1101 on the outer side are each provided with a first groove 1104 that is open downward; correspondingly, two of the three bottom U-shaped keels 1102 on the outer side are each provided with a second groove 1105 that is open upward, the first groove 1104 and the second groove 1105 are arranged in an upper-lower relationship, the upper end of the filter plate 14 is arranged in the first groove 1104, and the lower end of the filter plate 14 is arranged in the second groove 1105, and this upper-lower clamping mounting mode enables the filter plate 14 to be kept in a vertical and stable state inside the tank body 11, effectively avoiding shaking or displacement under the impact of airflow. A filter screen (not shown in the figure) is arranged in the middle of the filter plate 14.

[0095] In addition, there are various flexible implementation manners for this structure. In some embodiments, only the top U-shaped keel of the three top U-shaped keels on the outer side is provided with the first groove 1104 that is open downward, and the corresponding bottom U-shaped keel is not provided with the second groove 1105, at this time, the filter plate 14 is fixed by cooperation of the upper end and the first groove 1104, and the lower end is in direct contact with the bottom U-shaped keel 1102 to keep stable; in other embodiments, only the bottom U-shaped keel of the three bottom U-shaped keels on the outer side is provided with the second groove 1105 that is open upward, and the top U-shaped keel is not provided with a corresponding groove, and the lower end of the filter plate 14 is embedded in the second groove 1105, and the upper end is in direct contact with the top U-shaped keel 1101 to realize fixation.

[0096] By additionally arranging the filter plate, the present embodiment can intercept relatively large oil fume particles and impurities before the oil fume enters the electric field, reduce the purification burden of the electric field, enable the electric field to be more focused on the treatment of fine particles and charged particles, and thus improve the overall purification efficiency and quality. Meanwhile, the groove design of the U-shaped keel makes the dismounting and mounting operation of the filter plate very simple. When the filter screen needs to be replaced due to saturation, the filter plate can be quickly replaced by being taken out of the groove without complex dismounting of other structures inside the tank body, which greatly reduces the difficulty and time cost of equipment maintenance.

[0097] The present application also comprises an extractor hood, which comprises the extractor hood electrostatic purifier described in any of the foregoing embodiments and has the beneficial effects of the extractor hood electrostatic purifier described in any of the foregoing embodiments, which will not be described herein again.

[0098] In the description of the application, it should be understood that the terms "first", "second" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0099] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0100] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" 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 application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0101] Although the embodiments of the application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. An electrostatic precipitator for a range hood, characterized by comprising: The purification tank and the electric control box are connected electrically. The purification tank comprises a hollow tank body and at least one electric field arranged in the tank body. The electric control box and the electric field are connected electrically.

2. The range hood electrostatic precipitator of claim 1, wherein, The tank body further comprises a maintenance opening with a hatch, and the hatch is formed by a shell of the electric control box.

3. The range hood electrostatic precipitator of claim 1, wherein, The spray assembly comprises a longitudinal main pipeline, a plurality of spray heads and a plurality of transverse branch pipelines.

4. The range hood electrostatic precipitator of claim 3, wherein, The tank body further comprises a first U-shaped keel fixed to the inner top of the tank body.

5. The range hood electrostatic precipitator of claim 1, wherein, The tank body further comprises a heater for heating the electric field.

6. The range hood electrostatic precipitator as claimed in claim 5, wherein The tank body further comprises a plurality of second U-shaped keels.

7. The range hood electrostatic precipitator of claim 6, wherein, The tank body further comprises a plurality of top U-shaped keels and a plurality of bottom U-shaped keels.

8. The range hood electrostatic precipitator of claim 1, wherein, The tank body further comprises a filter plate.

9. The range hood electrostatic precipitator as claimed in claim 8, wherein, 10. An extractor hood comprising the electrostatic purifier according to any one of claims 1-9. ​ ​

Images