CN212841749U - Internal circulation range hood - Google Patents

Abstract

The utility model discloses an inner loop lampblack absorber, include: the device comprises a cyclone oil screen, an electrostatic dust collector, an active carbon filtering device, a water mist purifying device, a UV lamp and aluminum-based photocatalyst filtering screen integrated device; the cyclone oil net is arranged at the position of an oil fume air inlet, and the filtering sequence of the oil fume is as follows: the oil smoke passes through the cyclone oil net, enters the ventilation channel, sequentially passes through the electrostatic dust collector, the activated carbon device, the water mist purification device and the UV lamp and aluminum-based photocatalyst filter screen integrated device, and is finally discharged from the air outlet. The method comprises the steps of firstly treating substances such as dust with large particles by using an electrostatic dust collector and an active carbon filter device, then deodorizing and filtering by using a water mist purification device, and finally carrying out chemical treatment on substances such as ozone and the like which are not easy to physically filter in oil smoke by using a UV lamp and aluminum-based photocatalyst filter screen integrated device.

Description

Internal circulation range hood

Technical Field

The utility model belongs to the technical field of the oil smoke purifies, a inner loop lampblack absorber is related to.

Background

Most of the prior art air filtering devices have single function, generally only one air filtering device is used, and partial filtering devices also can improve the purification efficiency by combining a plurality of air purifying devices, which can actually achieve better effect than the single filtering device, but most of the combined devices do not fully exert the performance according to the characteristics and properties of various filtering devices, so that the filtering devices cannot achieve the expected effect; in view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art not enough, disclose an inner loop lampblack absorber, this inner loop lampblack absorber's use operation is very convenient, can carry out purification treatment effectively to the oil smoke simultaneously. In order to achieve the above purpose, the utility model adopts the following technical scheme:

an internal circulation range hood comprising: the device comprises a cyclone oil screen, an electrostatic dust collector, an active carbon filtering device, a water mist purifying device, a UV lamp and aluminum-based photocatalyst filtering screen integrated device; the cyclone oil net is arranged at the position of an oil fume air inlet, and the filtering sequence of the oil fume is as follows: the oil smoke passes through in the whirlwind formula oil net gets into the ventilation passageway, again in proper order through electrostatic precipitator, active carbon filter equipment, water smoke purifier and UV lamp and aluminium base photocatalyst filter screen body device, at last by the air outlet discharge again.

Further, the air outlet is provided with a fan, and the fan provides aerodynamic force for the ventilation channel.

Furthermore, the cyclone oil net is arranged at the upper part of the internal circulation range hood.

Further, the electrostatic precipitator includes: the oil fume purification device comprises a discharge electrode and a collecting electrode, wherein a high-voltage electric field exists between the discharge electrode and the collecting electrode, the oil fume is ionized by the high-voltage electric field, dust charges in the oil fume are separated from air flow under the action of the electric field, and the discharge electrode comprises at least one metal wire; the collecting electrode comprises a plurality of metal plates which are arranged in parallel, and a channel for oil smoke to flow is formed between the metal plates.

Furthermore, the metal plate comprises a first collector plate arranged on two sides of the metal lead and a second collector plate arranged at the rear end of the internal cavity of the electrostatic dust collector, the first collector plate is arranged at the front end of the internal cavity of the electrostatic dust collector, and the metal lead and the first collector plate are parallel to each other and extend in the same direction.

Further, the second collector plate and the first collector plate are arranged in a matrix, and the arrangement density of the second collector plate is greater than that of the first collector plate.

Furthermore, the UV lamp and aluminum-based photocatalyst filter screen integrated device comprises a UV lamp and aluminum-based photocatalyst filter boards arranged on two sides of the UV lamp.

Further, the water mist purification device comprises: a water storage tank for storing liquid; the spray type water tank comprises a shell assembly, the shell assembly comprises an air inlet side and an air outlet side, a first water mist isolation screen is arranged on the air inlet side, a filter screen assembly is arranged on the air outlet side, a pipeline assembly is arranged between the first water mist isolation screen and the filter screen assembly, at least one nozzle capable of spraying water mist is arranged on the inner side of the spray type water tank of the pipeline assembly, and a second water mist isolation screen is arranged between the pipeline assembly and the filter screen assembly; liquid accumulated at the bottom of the cavity of the shell assembly is discharged into the water storage tank; and the water pump is respectively connected with the pipeline assembly and the water storage tank.

Further, the active carbon filter device includes first filter portion and second filter portion, first filter portion is including straining the frame and filling the first active carbon of straining the frame, it has the installation department to strain the frame, the second filter portion is installed strain the installation department of frame, the second filter portion includes the filter screen and fills the second active carbon of filter screen.

Further, the cyclone oil net comprises: the oil fume collecting device comprises a shell, wherein a cavity for collecting oil fume is formed in the shell, and an air outlet of an air curtain fan is formed in the side wall of the cavity; the oil screen is arranged at the bottom of the shell and used for filtering oil smoke; the air duct is arranged in the cavity, the front end of the air duct is provided with a fan air inlet, the rear end of the air duct is close to a fan suction opening, and the side wall of the air duct is communicated with the air outlet of the air curtain fan; and the air deflector is arranged in the ventilation pipeline and used for adjusting the air speed of the air outlet of the air curtain fan.

The utility model has the advantages that:

the utility model discloses an inner loop lampblack absorber, include: the device comprises a cyclone oil screen, an electrostatic dust collector, an active carbon filtering device, a water mist purifying device, a UV lamp and aluminum-based photocatalyst filtering screen integrated device; the cyclone oil net is arranged at the position of an oil fume air inlet, and the filtering sequence of the oil fume is as follows: the oil smoke passes through in the whirlwind formula oil net gets into the ventilation passageway, again in proper order through electrostatic precipitator, active carbon filter equipment, water smoke purifier and UV lamp and aluminium base photocatalyst filter screen body device, at last by the air outlet discharge again. The oil smoke that produces passes through cyclone oil net in proper order again, electrostatic precipitator, active carbon filter equipment, water smoke purifier, after UV lamp and aluminium base photocatalyst filter screen body device, comparatively thorough purification treatment has been carried out, its beneficial effect lies in the layering and the scientificity of purification, it handles to utilizing electrostatic precipitator and active carbon filter equipment to the material such as the great dust of granule earlier, water smoke purifier removes flavor and filters again, adopt UV lamp and aluminium base photocatalyst filter screen body device to carry out chemical treatment to the difficult physical filterable material such as ozone in the oil smoke at last.

Drawings

FIG. 1 is a schematic diagram of the working principle of an internal circulation range hood;

FIG. 2 is a schematic structural diagram of the front side of an internal circulation range hood;

FIG. 3 is an exploded view of an integrated UV lamp and aluminum-based photocatalyst filter screen;

FIG. 4 is a schematic front view of an electrostatic precipitator;

FIG. 5 is a schematic sectional view taken along the line A-A in FIG. 4;

FIG. 6 is an exploded view of an electrostatic precipitator;

FIG. 7 is an enlarged partial schematic view of FIG. 6 at A;

FIG. 8 is an exploded view of the spray tank;

FIG. 9 is a schematic perspective view of the water mist purification apparatus;

FIG. 10 is a perspective view of an activated carbon filter assembly;

FIG. 11 is an exploded schematic view of an active filtration device;

FIG. 12 is an exploded view of a first filter portion of an active filter device;

FIG. 13 is an exploded view of a second filter portion of the active filter device;

FIG. 14 is a schematic view of a cyclone oil net;

FIG. 15 is a front view of a cyclonic oil screen;

FIG. 16 is a schematic sectional view taken along the line A-A in FIG. 15;

FIG. 17 is a schematic sectional view taken along the line B-B in FIG. 15;

FIG. 18 is a schematic view of the overall structure of the cyclone oil net in use;

FIG. 19 is a schematic cross-sectional view of the entire structure B-B of the cyclone oil net in use.

The labels in the figure are: 1-electrostatic dust collector, 101-first collecting plate, 102-metal wire, 103-second collecting plate, 2-activated carbon filtering device, 201-first filtering part, 202-second filtering part, 211-filtering frame, 212-first activated carbon, 221-filtering screen, 2111-shell, 2113-bracket, 2114-bearing plate, 2115-handle, 2116-pull-out limiting part, 2117-inner frame, 2118-mounting part, 2211-orifice plate, 2212-fixing plate, 2213-screen, 3-water mist purifying device, 301-bottom cover, 304-top cover, 305-second side plate, 306-first side plate, 308-first water mist isolating screen, 309-second water mist isolating screen, 310-pipeline assembly, 11-handle, 314-a water storage tank, 4-a UV lamp and aluminum-based photocatalyst filter screen integrated device, 401-a first photocatalyst filter plate, 402-a UV lamp, 403-a second UV lamp, 404-a third photocatalyst filter plate, 405-a second photocatalyst filter plate, 5-a fan, 6-a cyclone oil screen, 6100-a shell, 6110-a cavity and 6120-a fan air suction opening; 6200-air outlet of air curtain fan; 6300-oil net; 6400-ventilation ducts; 6500-air inlet of blower; 6600-wind deflector; 6700-baffle; 6800-control panel; 6900-frame, 7-drawer, 8-ventilation channel corner arc, 9-air equalizing plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 19, an internal circulation range hood includes: the device comprises a cyclone oil screen 6, an electrostatic dust collector 1, an active carbon filtering device 2, a water mist purifying device 3, a UV lamp and aluminum-based photocatalyst filtering screen integrated device 4; the cyclone oil screen 6 is arranged at the position of an oil fume air inlet, and the filtering sequence of the oil fume is as follows: the oil smoke enters a ventilation channel through the cyclone oil screen 6, then sequentially passes through the electrostatic dust collector 1, the activated carbon filtering device 2, the water mist purifying device 3 and the UV lamp and aluminum-based photocatalyst filter screen integrated device 4, and finally is discharged from an air outlet;

in the embodiment, the air outlet is provided with a fan 5, and the fan 5 provides aerodynamic force for the ventilation channel;

in the embodiment, the cyclone oil net 6 is arranged at the upper part of the internal circulation range hood.

When in use, the photocatalyst is a general name of a photo-semiconductor material with a photocatalytic function represented by nano-scale titanium dioxide, is coated on the surface of a substrate, and generates a strong catalytic degradation function under the action of ultraviolet light: can effectively degrade toxic and harmful gases in the air; can effectively kill various bacteria and decompose and harmlessly treat toxins released by bacteria or fungi; meanwhile, the composite material also has the functions of removing formaldehyde, deodorizing, resisting pollution, purifying air and the like. The filtering principle of the photocatalyst is that the photocatalyst plays a catalytic role under the irradiation condition of ultraviolet light, the photocatalyst does not participate in the reaction, water can improve the catalytic function of the photocatalyst, and moisture can be decomposed into a large number of hydroxyl free radicals (OH) under the action of the ultraviolet light, and the hydroxyl free radicals have strong oxidizing property and can effectively explain harmful substances in the oxidized air. Therefore, in consideration of the function of the integrated device 4 of the water and the UV lamp and the aluminum-based photocatalyst filter screen, the integrated device 4 of the UV lamp and the aluminum-based photocatalyst filter screen is placed behind the water mist device 3 to be used as a final filtering process; in addition, the electrostatic precipitator 1 as the second filtering generates a certain amount of ozone (O) during the use process₃) If the concentration of ozone in the air is too high, the ozone is not good for human health, so the generated ozone is not directly discharged; the ultraviolet light emitted by the UV lamp and aluminum-based photocatalyst filter screen integrated device 4 just has the function of decomposing ozone, so the UV lamp and the aluminum-based photocatalyst filter screen integrated device also have the function of decomposing ozoneThe aluminum-based photocatalyst filter screen integrated device 4 is placed in one of the following important reasons.

Referring to fig. 4 to 7, in an embodiment, the electrostatic precipitator 1 includes: the high-voltage electric field is arranged between the discharge electrode and the collecting electrode, the oil smoke is ionized by the high-voltage electric field, dust charges in the oil smoke are separated from air flow under the action of the electric field, and the discharge electrode comprises at least one metal wire 102; the collecting electrode comprises a plurality of metal plates which are arranged in parallel, and a channel for oil smoke to flow is formed between the metal plates. In the embodiment, the electrostatic precipitator 1 adopts the working principle that the flue gas is ionized by a high-voltage electric field, and the charged dust in the airflow is separated from the airflow under the action of the electric field. The discharge electrode is used as a dust collecting electrode; the performance of the electrostatic precipitator 1 is influenced by three factors, namely dust property, equipment structure, flue gas flow rate and the like; the specific resistance of the dust is an index for evaluating the conductivity, and has direct influence on the dust removal efficiency; the specific resistance is too low, and dust particles are difficult to retain on the dust collecting electrode, so that they are returned to the air flow. The specific resistance is too high, dust particle charges reaching the dust collecting electrode are not easy to discharge, and local breakdown and discharge are generated due to voltage gradient formed between dust layers, so that the dust removal efficiency is reduced.

Referring to fig. 5, in the embodiment, the influence of dust properties, equipment configuration and flue gas flow velocity on the electrostatic dust removal effect is comprehensively considered, and a reasonable structural design is performed, the metal plate includes a first collector plate 101 disposed on two sides of the metal lead 102 and a second collector plate 103 disposed at the rear end of the internal cavity of the electrostatic dust collector, the first collector plate 101 is disposed at the front end of the internal cavity of the electrostatic dust collector, and the metal lead 102 and the first collector plate 101 are parallel to each other and extend in the same direction. In an embodiment, the second collecting plate 103 and the first collecting plate 101 are arranged in a matrix, and an arrangement density of the second collecting plate 103 is greater than an arrangement density of the first collecting plate 101. In the embodiment, before entering the electrostatic precipitator 1, the oil smoke is guided in by a corner arc 8 in the ventilation channel, and then enters the electrostatic precipitator 1 after passing through the air-equalizing plate 9.

In use, the soot flowing into the electrostatic precipitator 1 needs to pass through the arranged metal wires 102, and since the first collector plates 101 are further disposed on both sides of the metal wires 102, under the action of an electric field between the first collector plates 101 and the first collector plates 101, the dust charges are separated from the air flow and adsorbed on the dust collecting electrodes, and the second collector plates 103 arranged in a matrix are also required at one end of the electrostatic precipitator 1 away from the metal wires 102, but since the distance between the second collector plates 103 and the metal wires 102 is relatively long, the soot cleaning action between the second collector plates 103 is prevented from being weakened in order to balance the loss of the electric field strength, and therefore, the arrangement density of the second collector plates 103 is set to be greater than that of the first collector plates 101.

Referring to fig. 3, in an embodiment, the UV lamp and aluminum-based photocatalyst filter integrated apparatus 4 includes a UV lamp 402 and aluminum-based photocatalyst filter plates disposed on both sides of the UV lamp 402. In an embodiment, the UV lamps 402 are arranged in three and all fixed in the cavity of the UV lamp housing assembly, and a second UV lamp 403 similar to the UV lamps 402; aluminium base photocatalyst filter includes first photocatalyst filter 401, second photocatalyst filter 405 and third photocatalyst filter 404, first photocatalyst filter 401 is located between UV lamp 402 and second UV lamp 403, second photocatalyst filter 405 will UV lamp 402 seals the cavity of UV lamp shell subassembly, third photocatalyst filter 404 will second UV lamp 403 seals in the cavity of UV lamp shell subassembly, the oil smoke flows through in UV lamp and aluminium base photocatalyst filter integrative device 4, carries out evolution treatment to harmful gas under the effect of all UV lamps and photocatalyst.

Referring to fig. 8 and 9, in an embodiment, the water mist purification apparatus 3 includes: a water storage tank 314 for storing liquid; the spray type water tank comprises a shell assembly, the shell assembly comprises an air inlet side and an air outlet side, the air inlet side is provided with a first water mist isolation screen 308, the air outlet side is provided with a filter screen assembly, a pipeline assembly 310 is arranged between the first water mist isolation screen 308 and the filter screen assembly, the pipeline assembly 310 is provided with at least one nozzle capable of spraying water mist on the inner side of the spray type water tank, and a second water mist isolation screen 309 is arranged between the pipeline assembly 310 and the filter screen assembly; liquid accumulated in the bottom of the cavity of the housing assembly drains into the water storage tank 314; and a water pump 315 respectively connected with the pipe assembly 310 and the water storage tank 314.

When the oil smoke purifier is used, the spray type water tank can recycle liquid in the water storage tank 314, the liquid is atomized in the spray type water tank, and the oil smoke passing through the spray type water tank is purified and filtered; the first mist isolation screen 308 and the second mist isolation screen 309 isolate the mist of the nozzles located therebetween to prevent the mist sprayed from leaking from the spray tank, and more importantly, the second mist isolation screen 309 can primarily isolate the mist sprayed from the nozzles to prevent the mist from being directly sprayed onto subsequent filter screen assemblies, so that the air passing through the spray tank is treated in a targeted manner by each layer of isolation devices or filter devices.

Referring to fig. 8 and 9, in an embodiment, the housing assembly of the spray type water tank includes a top cover 304, a bottom cover 301, a first side plate 306 and a second side plate 305, the bottom cover 301 is in a "U" shape, the bottom of the bottom cover 301 can be loaded with a certain volume of standing water, the first side plate 306 and the second side plate 305 are respectively fixed on two sides of the bottom cover 301 to play a strengthening role, and a handle 311 is fixedly connected to a side surface of the bottom cover 301.

In an embodiment, the liquid in the water storage tank 314 contains a deodorizer; in order to improve the effect of water mist in purifying oil smoke and further remove odor, a certain amount of special deodorant for treating air needs to be added into the water storage tank 314 in proportion before the water mist filtering device is used, so that the special deodorant is mixed with water for use, and the odor can be better removed.

Referring to fig. 10 to 13, in an embodiment, the activated carbon filter device 2 includes a first filter portion 201 and a second filter portion 202, the first filter portion 201 includes a filter frame 2211 and first activated carbon 212 packed in the filter frame 211, the filter frame 211 has a mounting portion 2118, the second filter portion 202 is mounted in the mounting portion 2118 of the filter frame, and the second filter portion 202 includes a filter screen 221 and second activated carbon packed in the filter screen 221.

Referring to fig. 11, in some embodiments, the type of activated carbon to be filled may be specifically set according to actual production requirements. In some embodiments, activated carbon having a low wind resistance may be filled into the filter frame 211 while activated carbon having a relatively high wind resistance may be filled into the filter screen 221. Wherein, the filter frame 211 has a certain thickness and has a fixing function for the whole filter device. The filter screen 221 is arranged at the mounting part 2118 of the filter frame 211, the filter screen 221 has an abundant mesh structure, gas can easily enter the filter frame 211 through the filter screen 221, the wind resistance of the gas is small, the circulation of the gas in the air inlet is accelerated, the filter screen 221 is filled with second activated carbon, the second activated carbon can adsorb and primarily purify the oil smoke in the air inlet, and the first activated carbon further adsorbs the oil smoke, so that the purification efficiency is improved.

Referring to fig. 13, in the embodiment, the number of the second filtering portions 202 is 2, and the second filtering portions are respectively installed at two sides of the first filtering portion 201 through the installation portion 2118, the 2 second filtering portions 202 are respectively located at two sides of the air inlet and the air inlet of the first filtering portion 201, the filtering frame 211 is sandwiched therebetween, and the filtering frame 2211 and the filtering screen 221 of the device both contact the oil smoke in the front direction and are perpendicular to the oil smoke moving direction, so that the contact surface between the activated carbon and the oil smoke can be increased to the maximum extent, and the oil smoke purifying efficiency of the device is improved. In some embodiments, activated carbon with strong water absorption can be filled in the filter screen as second activated carbon, moisture on the gas is absorbed by the second activated carbon after passing through the filter screen, so that the second activated carbon in the filter frame is protected from affecting the absorption effect due to the entering of the moisture, and the second filter parts 202 are arranged on two sides of the first filter part 201 and can also protect the first filter part 201.

Referring to fig. 12 and 13, in an embodiment, the first activated carbon 212 is a honeycomb activated carbon and the second activated carbon is a columnar activated carbon. The honeycomb activated carbon has a large surface area and a plurality of gaps, a good channel is provided for the circulation of gas by the special pore structure of the honeycomb activated carbon, the contact area with the gas is large, and the wind resistance of the gas circulation can be reduced. The columnar activated carbon has excellent filtering effect and strong adsorption capacity although the relative wind resistance is large. The two kinds of activated carbon with different characteristics are combined, so that the gas circulation rate can be ensured, and a better filtering effect can be achieved.

Referring to fig. 12 and 13, in an embodiment, the filter frame 211 includes a housing 2111 and a positioning member 2112, and the positioning member 2112 includes a support 2113, the support 2113 abuts against the inner side of the housing 2111 and is fitted around the periphery of the first activated carbon 212 for fixing the first activated carbon 212, so that the first activated carbon 212 is stably packed in the filter frame 2211 according to a certain arrangement. The positioning member 2112 further includes a carrier plate 2114, the carrier plate 2114 is disposed in a grid shape in the middle of the bracket 2113, and the grid size is matched with the size of the first activated carbon 212. The carrier plates 2114 are in a cross shape to separate each first activated carbon 212, and each first activated carbon is placed in a grid to complete the filling of the filter frame 211, so that the activated carbons are stably and uniformly arranged and cannot be extruded and deformed mutually.

Referring to fig. 14 to 19, a cyclone type oil net apparatus includes: the housing 6100 is Contraband-shaped, a cavity 6110 for collecting oil smoke is formed in the housing 6100, an air curtain fan air outlet 6200 is formed in a side wall of the cavity 6110, a plurality of air curtain fan air outlets 6200 are arranged, and are uniformly arranged on the housing 6100 in a strip shape, and the air curtain fan air outlets 6200 are arranged on the side wall of the cavity 6110 along the length direction of the ventilation duct 6400, in this embodiment, the arranging direction of the air curtain fan air outlets 6200 is arranged obliquely downward; an oil screen 6300 installed at the bottom of the housing 6100 for filtering the oil smoke; the ventilating duct 6400 is installed in the cavity 6110, the ventilating duct 6400 is fixed with the inner wall of the top of the cavity 6110, the front end of the ventilating duct 6400 is provided with a fan air inlet 6500, the rear end of the ventilating duct 6400 is close to the fan suction opening 6120, and the side wall of the ventilating duct 6400 is communicated with an air curtain fan air outlet 6200; the air deflector 6600 installed in the ventilation duct 6400 is used for adjusting the air speed of the air outlet 6200 of the air curtain fan, in this embodiment, the cross-sectional area of the ventilation duct 6400 is gradually reduced from the fan air inlet 6500 to the fan suction opening 6120, correspondingly, the size of the air deflector 6600 is gradually reduced from the fan air inlet 6500 to the fan suction opening 6120, and the air deflector 6600 is uniformly distributed in the ventilation duct 6400 and fixed with the inner wall of the ventilation duct 6400.

According to the above embodiments of the present application, the outer side wall of the housing 6100 is further provided with a baffle 6700, the baffle 6700 is hinged to the outer wall of the housing 6100, and can rotate relative to the outer wall of the housing 6100, and can be used as a table top after being laid flat.

According to the above embodiment of the present application, a control panel 6800 is further disposed on the outer wall of the housing 6100.

According to the above embodiments of the present application, a frame 6900 is further disposed on the top outer wall of the housing 6100.

The working principle is as follows: when the stove is used, when the amount of oil smoke generated by the stove is large, and the oil smoke in the cavity 6110 may not be completely pumped away, by using the air outlet 6200 of the air curtain fan, the air inlet 6500 of the ventilating duct 6400 is communicated with the fan, the fan exhausts air into the ventilating duct 6400, and the wind speed of the fan exhausting air into the ventilating duct 6400 is ensured to be larger than the moving wind speed of the oil smoke, so that a wind wall is formed at the position of the air outlet 6200 of the air curtain fan, so as to seal off the oil smoke in the cavity 6110, and the air guide plate 600 is arranged in the ventilation pipeline 6400, so that each air curtain fan air outlet 6200 can uniformly exhaust air, thereby preventing oil smoke from escaping from the position where the air speed of the air curtain fan air outlet 200 is small, then only a certain time is needed to be spent to pump away the oil smoke and perform purification treatment, and finally the oil smoke device can be ensured to pump away and purify the oil smoke in the cavity 6110 to the maximum extent.

The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An inner loop lampblack absorber, its characterized in that includes: the device comprises a cyclone oil screen (6), an electrostatic dust collector (1), an active carbon filtering device (2), a water mist purifying device (3), and an integrated device (4) of a UV lamp and an aluminum-based photocatalyst filtering screen; the cyclone oil net (6) is arranged at the position of an oil fume air inlet, and the filtering sequence of the oil fume is as follows: the oil smoke passes through in whirlwind formula oil net (6) gets into the ventilation passageway, passes through in proper order again electrostatic precipitator (1), active carbon filter equipment (2), water smoke purifier (3) and UV lamp and aluminium base photocatalyst filter screen integrated into one piece device (4), at last by the air outlet discharge again.

2. An internal circulation range hood according to claim 1, characterized in that the air outlet is provided with a fan (5), the fan (5) providing aerodynamic force to the ventilation channel.

3. An internal circulation hood according to claim 1, characterized in that the cyclone oil screen (6) is arranged at the upper part of the internal circulation hood.

4. An internal circulation hood according to claim 1, characterized in that said electrostatic precipitator (1) comprises: the oil smoke collection device comprises a discharge electrode and a collector electrode, wherein a high-voltage electric field exists between the discharge electrode and the collector electrode, the oil smoke is ionized by the high-voltage electric field, dust charges in the oil smoke are separated from air flow under the action of the electric field, and the discharge electrode comprises at least one metal wire (102); the collecting electrode comprises a plurality of metal plates which are arranged in parallel, and a channel for oil smoke to flow is formed between the metal plates.

5. The internal circulation range hood according to claim 4, wherein the metal plate comprises a first collecting plate (101) disposed at both sides of the metal wire (102) and a second collecting plate (103) disposed at a rear end of an internal cavity of the electrostatic precipitator, the first collecting plate (101) is disposed at a front end of the internal cavity of the electrostatic precipitator, and the metal wire (102) and the first collecting plate (101) are parallel to each other and extend in the same direction.

6. An internal circulation range hood according to claim 5, wherein the second collecting plate (103) and the first collecting plate (101) are arranged in a matrix, and an arrangement density of the second collecting plate (103) is greater than an arrangement density of the first collecting plate (101).

7. An internal circulation range hood according to claim 1, characterized in that the UV lamp and aluminum-based photocatalyst filter screen integrated device (4) comprises a UV lamp (402) and aluminum-based photocatalyst filter screens arranged at both sides of the UV lamp (402).

8. An internal circulation hood according to claim 1, characterized in that said water mist purification device (3) comprises: a water storage tank (314) for storing liquid; the spray type water tank comprises a shell assembly, the shell assembly comprises an air inlet side and an air outlet side, a first water mist isolation screen (308) is arranged on the air inlet side, a filter screen assembly is arranged on the air outlet side, a pipeline assembly (310) is arranged between the first water mist isolation screen (308) and the filter screen assembly, at least one nozzle capable of spraying water mist is arranged on the inner side of the spray type water tank of the pipeline assembly (310), and a second water mist isolation screen (309) is arranged between the pipeline assembly (310) and the filter screen assembly; liquid accumulated in the bottom of the cavity of the housing assembly drains into the water storage tank (314); a water pump (315) respectively connecting the pipe assembly (310) and the water storage tank (314).

9. An internal circulation range hood according to claim 1, characterized in that the activated carbon filter device (2) comprises a first filter portion (201) and a second filter portion (202), the first filter portion (201) comprises a filter frame (211) and first activated carbon (212) filled in the filter frame (211), the filter frame (211) has a mounting portion (2118), the second filter portion (202) is mounted in the mounting portion (2118) of the filter frame, and the second filter portion (202) comprises a filter screen (221) and second activated carbon filled in the filter screen (221).

10. An internal circulation hood according to claim 1 or 2, characterized in that said cyclone-like oil screen (6) comprises: a housing (6100), wherein a cavity (6110) for collecting oil smoke is formed in the housing (6100), and an air outlet (6200) of the air curtain fan is arranged on the side wall of the cavity (6110); an oil screen (300) installed at the bottom of the housing (6100) for filtering oil smoke; the ventilating duct (6400) is installed in the cavity (6110), the front end of the ventilating duct (6400) is provided with a fan air inlet (6500), the rear end of the ventilating duct (6400) is close to a fan suction opening (6120), and the side wall of the ventilating duct (6400) is communicated with the air outlet (6200) of the air curtain fan; and the air deflector (6600) is arranged in the ventilating duct (6400) and is used for adjusting the air speed of the air outlet (6200) of the air curtain fan.

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