A fume gas purification device

Abstract

The present invention discloses an oil fume gas purification device, comprising a casing of a range hood, an air inlet being arranged on an oil fume suction side of the casing, and an oil fume separation device being installed at the air inlet; the oil fume separation device comprises a plurality of oil guide plates, a plurality of oil baffle plates and a cooling device for cooling the oil baffle plates, a plurality of the oil guide plates being arranged obliquely in the longitudinal direction and being installed at the front side of the air inlet, a plurality of the oil baffle plates being arranged obliquely in the longitudinal direction and being installed at the rear side of the oil guide plates and the side edges of the oil baffle plates extending into the oil guide plates, the cooling device providing circulating coolant for the oil baffle plates, an oil cup for receiving the oil liquid inside the oil guide plates being installed at the bottom of the casing, when the oil fume gas encounters the low-temperature oil baffle plate and is condensed into oil liquid, it falls onto the oil guide plate and then flows into the oil cup to collect the oil liquid, thereby reducing the oil fume particles entering the interior of the range hood and extending the cleaning cycle of the range hood.

Description

Technical Field

[0001] The invention relates to the technical field of oil fume purification, and in particular to an oil fume gas purification device. Background Art

[0002] With the continuous improvement and enhancement of our country's people's living standards, kitchen range hoods have become a necessity in people's lives.

[0003] Existing household range hoods mostly use activated carbon adsorption, mechanical separation and electrostatic treatment methods to purify oil smoke. Among them, the activated carbon adsorption method mainly uses granular activated carbon or activated carbon fiber felt to adsorb oil smoke particles in the oil smoke to achieve the effect of purifying oil smoke; the mechanical separation method uses the inertial collision principle or cyclone separation principle to throw the oil smoke to the inner wall of the range hood and flow to the oil cup for collection; the electrostatic treatment method uses the electric field to separate the oil mist and then deviate during the movement and adsorb on the anode plate. When the above three types of oil smoke are purified, the treated oil stains are easily adsorbed on the inner wall of the range hood, and the above structures are all inside the range hood. It is extremely inconvenient to regularly clean the oil stains inside the range hood. At the same time, there is also a way to treat the oil smoke by condensation. This scheme is to collide the high-temperature oil smoke flowing to the range hood with the low-temperature oil baffle plate and then condense it, thereby separating the oil stains from the smoke and reducing the oil stains entering the range hood.

[0004] The continuous high temperature during cooking will increase the temperature of the oil baffle, thereby reducing the effect of oil fume separation.

[0005] Therefore, how to design an oil fume purification device that reduces the amount of oil fume entering the interior of the range hood has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0006] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide an oil fume gas purification device to solve the problem that the temperature of the oil baffle plate continues to rise during continuous use, thereby reducing the oil fume separation effect.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A fume gas purification device comprises a casing of a range hood, an air inlet is provided on the oil fume suction side of the casing, and an oil fume separation device is installed at the air inlet; the oil fume separation device comprises a plurality of oil guide plates, a plurality of oil baffle plates and a cooling device for cooling the oil baffle plates, a plurality of the oil guide plates are arranged longitudinally and inclined and are installed on the front side of the air inlet, a plurality of the oil baffle plates are arranged longitudinally and inclined on the rear side of the oil guide plates and the side edges of the oil baffle plates extend into the oil guide plates, the cooling device provides circulating coolant for the oil baffle plates, and an oil cup for receiving the oil inside the oil guide plates is installed at the bottom of the casing.

[0009] Furthermore, a cooling chamber for storing coolant is provided in the oil baffle plate, and a liquid inlet pipe and a liquid outlet pipe connected to the cooling chamber are provided on the oil baffle plate. The liquid inlet pipe and the liquid outlet pipe are respectively located at two ends of the oil baffle plate, and the cooling chambers of two adjacent oil baffle plates are connected through the liquid inlet pipe and the liquid outlet pipe.

[0010] Furthermore, the cooling device includes a water-cooled radiator, a cooling fan, a liquid storage barrel, a water pump and a plurality of connecting pipes, the cooling fan is installed on the water-cooled radiator, the liquid inlet of the water-cooled radiator is connected to one of the cooling chambers, the liquid outlet of the water-cooled radiator is connected to the liquid storage barrel, the liquid inlet of the water pump is connected to the liquid storage barrel, and the liquid outlet of the water pump is connected to one of the cooling chambers.

[0011] Furthermore, an inwardly recessed heating groove is provided at the end of the oil guide plate, a heater is provided inside the heating groove, and the heater is electrically connected to the switch of the range hood and an external power supply to form a series circuit.

[0012] Furthermore, the purification device also includes a mounting bracket installed on the air inlet, the oil guide plate and the oil baffle plate are installed on the mounting bracket, the bottom wall and the top wall of the air inlet are both provided with mounting grooves, and the outer side of the mounting bracket is fixed with a limit plate that is inserted into the interior of the mounting grooves on the upper and lower sides, and the side walls of the limit plates on the upper and lower sides are both against the side walls of the mounting grooves.

[0013] Furthermore, an elastic element is fixedly disposed in at least one of the mounting grooves, and when the elastic element is compressed, the limiting plate on one side extends out of the mounting groove on the same side.

[0014] Furthermore, the mounting frame includes two relatively arranged first support tubes and second support tubes, and a column located between the first support tube and the second support tube, the first support tube is provided with a first plug-in hole, the bottom end of the oil guide plate is fixed with a first plug-in column plugged into the first plug-in hole, and the second support tube is abutted against the top end of the oil guide plate.

[0015] Furthermore, a circuit board is installed on the inner wall of the second support tube, and the circuit board is connected to the circuit of the range hood. A plurality of second connectors are electrically connected to the circuit board. A heating wire is provided inside the heater, and the end of the heating wire is electrically connected to the first connector. A through hole for the first connector to pass through is provided on the second support tube, and the first connector is electrically connected to the second connector.

[0016] Furthermore, the oil guide plate is U-shaped, the opening of the oil guide plate faces the interior of the range hood, and a drainage plate for assisting oil to enter the interior of the oil cup is fixedly provided at the bottom of the oil guide plate.

[0017] Furthermore, a second plug-in hole is provided on the first support tube, a third plug-in hole is provided on the second support tube, a second plug-in column plugged into the third plug-in hole is fixedly provided on the top of the oil baffle plate, and a third plug-in column plugged into the inside of the second plug-in hole is fixedly provided on the bottom of the oil baffle plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: in the present invention, the oil smoke rushes toward the oil baffle through the air inlet, and the cooling device is used to provide circulating coolant to the inside of the oil baffle, thereby ensuring that the oil baffle is always in a low temperature state, preventing the hot oil smoke gas from exchanging heat with the oil baffle, increasing the temperature of the oil baffle, and thereby improving the condensation effect of the oil in the oil smoke gas;

[0019] When the oil fume gas encounters the oil baffle plate and condenses into oil, the subsequent high-temperature oil fume gas continues to impact the oil baffle plate, which can cause the oil on the oil baffle plate to flow. Since the side of the oil baffle plate extends to the oil guide plate, the oil on the oil baffle plate falls onto the oil guide plate and then flows into the oil cup to collect the oil.

[0020] Since the oil baffle can maintain a low temperature, the condensation effect of the oil at the air inlet is improved, and the amount of oil entering the range hood is reduced, which can extend the oil cleaning cycle inside the range hood, increase the service life of the range hood, and reduce the labor intensity of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a partial exploded view of the present invention;

[0023] Figure 3 is a cross-sectional view of the present invention;

[0024] Figure 4 for Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0025] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of B;

[0026] Figure 6 It is a partial cross-sectional view of the present invention;

[0027] Figure 7 This is a structural diagram of the installation of the oil baffle of the present invention;

[0028] Figure 8 The cooling schematic diagram of the oil baffle;

[0029] Fig. 9 It is a structural schematic diagram of the oil baffle;

[0030] Fig.10 It is a schematic diagram of the assembly structure of the mounting frame of the invention.

[0031] In the figure: 1, housing; 11, air inlet; 111, mounting groove; 12, air inlet; 13, exhaust port; 14, oil cup; 2, oil fume separation device; 21, mounting frame; 211, first support tube; 2111, first limit plate; 2112, first plug hole; 2113, second plug hole; 2114, third plug hole; 212, second support tube; 2121, second limit plate; 2122, guide groove; 2123, through hole; 2124, mounting hole; 2125, bolt hole; 213, column; 2131, positioning piece; 2132, bolt; 2133, plug-in piece; 214, Circuit board; 2141, second connector; 22, oil guide plate; 221, heating tank; 222, heater; 2221, heating wire; 2222, first connector; 223, first plug-in column; 224, drain plate; 23, oil baffle plate; 231, cooling chamber; 232, second plug-in column; 233, third plug-in column; 234, liquid inlet pipe; 235, liquid outlet pipe; 3, water-cooled radiator; 31, cooling fan; 4, water storage tank; 5, water pump; 61, first connecting pipe; 62, second connecting pipe; 63, third connecting pipe; 64, fourth connecting pipe; 71, first spring; 72, second spring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present embodiment provides an oil fume gas purification device, wherein the purification device is mainly installed on a range hood, and is mainly used to solve the problem that the oil baffle plate gradually becomes hot during use, thereby reducing the condensation effect of the oil on the oil baffle plate.

[0034] In this embodiment, if Figure 1 As shown, the range hood includes a housing 1, which is tilted on one side facing the kitchen cooking area, wherein the housing 1 is provided with an air inlet 11 facing the cooking side, and the top of the housing 1 is provided with an exhaust port 13 extending upward. When the range hood is working, cooking fumes flow from the inlet 11 into the interior of the housing 1 and are discharged outward through the exhaust port 13.

[0035] Since the oil baffle installed at the existing air inlet 11 position is not treated in any way. In the initial stage of turning on the range hood, the temperature of the oil baffle is relatively low. After the oil fume gas touches the oil baffle, the oil condenses and forms oil droplets on the oil baffle, thereby separating the oil and smoke. After the range hood is turned on continuously, the high temperature of the oil fume gas exchanges heat with the oil baffle, which increases the temperature of the oil baffle. At this time, the ability of the oil baffle to condense the oil in the oil fume gas decreases, thereby reducing the effect of oil-liquid separation. At this time, the oil will enter the interior of the range hood for oil removal treatment. The oil will accumulate inside the range hood, which is inconvenient for cleaning the oil and affects the service life of the range hood.

[0036] like Figure 1 and Figure 2 As shown, the oil fume separation device 2 is installed at the position of the air inlet 11, and the oil fume separation device 2 includes a mounting frame 21, and the mounting frame 21 is circular and can be detachably installed in the air inlet 11. The mounting frame 21 is provided with a plurality of oil guide plates 22 arranged along the length direction of the air inlet 11, and the oil guide plates 22 are longitudinally inclined and arranged at the front side of the air inlet 11, as shown in FIG. Figure 6 As shown, the mounting frame 21 is also provided with a plurality of oil baffles 23, which are located at the rear side of the gap between two adjacent oil guide plates 22, and the two sides of the oil baffles 23 extend into the oil guide plates 22. The oil fume gas enters the interior of the housing through the gap between the two oil guide plates 22, and then the oil molecules in the oil fume gas collide with the oil baffles 23, and then condense into oil liquid, which drips into the oil guide plate 22 along the side of the oil baffles 23. The bottom of the housing 1 is fixedly provided with an oil cup 14 for receiving the oil liquid in the oil guide plate 22.

[0037] In order to make the oil in the oil guide plate 22 flow smoothly into the oil cup 14, in this embodiment, Figure 6 As shown, the oil guide plate 22 is U-shaped, wherein the opening of the oil guide plate 22 faces the interior of the housing 1, and a guide plate 224 is fixedly provided at the bottom of the oil guide plate 22. Figure 4 As shown, the guide plate 224 is inclined toward the inside of the housing 1 and assists the oil inside the oil guide plate 22 to flow into the oil cup 14 .

[0038] like Figure 6As shown, in this embodiment, in order to reduce the heating rate of the oil baffle plate 23, a cooling chamber 231 is provided inside the oil baffle plate 23, and the cooling chamber 231 is filled with coolant. A cooling device for providing circulating coolant to the cooling chamber 231 is also provided inside the casing 1.

[0039] In this embodiment, if Fig. 9 As shown, the oil baffle plate 23 is V-shaped, and the oil baffle plate 23 is opposite to the flow direction of the oil smoke. The oil baffle plate 23 is provided with a liquid inlet pipe 234 and a liquid outlet pipe 235. The liquid inlet pipe 234 and the liquid outlet pipe 235 are respectively located at both ends of the oil baffle plate 23, which can increase the flow path of the coolant inside the cooling chamber 231.

[0040] Several oil baffles 23 are arranged in a row, such as Figure 6 As shown, the cooling chambers in two adjacent oil baffles 23 are connected in series via a liquid inlet 234 and a liquid outlet 235 .

[0041] like Figure 2 and Figure 8 As shown, the cooling device includes a water-cooled radiator 3, a cooling fan 31, a liquid storage tank 4, a water pump 5 and a plurality of connecting pipes. The inner wall of the housing 1 is provided with a mounting platform, the water-cooled radiator 3, the liquid storage tank 4 and the water pump 5 are all mounted on the mounting platform, the side wall of the housing 1 is provided with an air inlet 12, the cooling fan 31 is mounted on the water-cooled radiator 3 and the cooling fan 31 is opposite to the air inlet 12, as shown in FIG. Figure 8 As shown, the liquid inlet of the water-cooled radiator 3 is connected to the liquid outlet 235 of the oil baffle plate 23 through a first connecting pipe 61, the liquid outlet of the water-cooled radiator 3 is connected to a second connecting pipe 62 extending to the inside of the liquid storage barrel 4, the liquid inlet of the water pump 5 is connected to a third connecting pipe 63 extending to the inside of the liquid storage barrel 4 for absorbing the coolant in the liquid storage barrel 4, and the liquid outlet of the water pump 5 is connected to the liquid inlet 234 of the oil baffle plate 23 through a fourth connecting pipe 64, thereby enabling the circulation of the coolant in the cooling chamber 231.

[0042] Specifically: when the range hood is turned on, the water pump 5 works, and then absorbs the coolant in the liquid storage barrel 4 through the third connecting pipe 63 and transports it to the cooling chamber 231 of the oil baffle 23 through the fourth connecting pipe 64, so as to realize the circulation of the coolant in the cooling chamber 231, and ensure that the oil baffle 23 is always in a low temperature state. After the oil fume gas exchanges heat with the oil baffle 23, the coolant temperature rises and enters the water-cooled radiator 3 through the first connecting pipe 61. The cooling fan 31 runs, and absorbs the outside air through the air inlet 12 to dissipate the heat of the water-cooled radiator 31, and then cools the coolant, and then the cooled coolant flows back to the liquid storage barrel 4 through the second connecting pipe 62. The wind passing through the water-cooled radiator 3 enters the exhaust port 13 with the treated oil fume gas and is discharged outward.

[0043] In this embodiment, the oil guide plate 22, the flow guide plate 224 and the oil baffle plate 23 are coated with Teflon coating to prevent the adhesion of oil stains.

[0044] In order to improve the effect of preventing oil stains from adhering to the oil guide plate 22, in this embodiment, as shown in FIG. Figure 4 and Figure 6 As shown, a heating groove 221 is provided inside the oil guide plate 22, and a heater 222 is placed inside the heating groove 221. In this embodiment, the heater 222 includes a heating wire 2221 and a first connector 2222 connected to the heating wire 2221. The first connector 2222 is electrically connected to the switch of the range hood and an external power supply to form a series circuit.

[0045] Through the above arrangement, when the range hood is turned on, the switch is pressed, the range hood starts to work, and the external power supply supplies power to the first connector 2222, thereby causing the heating wire 2221 to heat up, thereby increasing the temperature of the oil guide plate 22, thereby increasing the temperature of the oil, improving the fluidity of the oil, and reducing the ability of the oil to adhere to the inside of the oil guide plate 22.

[0046] In order to realize the detachable installation of the mounting frame 21, as Figure 3 , Figure 4 and Figure 5 As shown, the bottom wall and the top wall of the air inlet 11 are both provided with a mounting groove 111, the mounting frame 21 is in a U-shape, and the bottom wall and the top wall of the mounting frame 21 are respectively fixed with a first limit plate 2111 and a second limit plate 2121, and elastic elements are placed inside the mounting grooves 111, the elastic element in the bottom mounting groove 111 is a first spring 71, and the elastic element in the top mounting groove 111 is a second spring 72.

[0047] The steps for disassembling the mounting frame 21 on the casing 1 of the range hood are as follows: prevent the first limit plate 2111 at the bottom of the mounting frame 21 from being inside the bottom mounting groove 111 and compress the first spring 71. At this time, let the mounting frame 21 flip upward and align the position of the second limit plate 2121 with the top mounting groove 111. At this time, release the mounting frame 21, and the corresponding spring pushes the mounting frame 21 to lift and plug the second limit plate 2121 into the top mounting groove 111. At this time, the side walls of the first limit plate 2111 and the second limit plate 2121 are both against the side walls of the mounting groove 111, thereby limiting the mounting frame 21 from falling from the range hood.

[0048] When removing the mounting bracket 21 from the range hood, it is necessary to press the mounting bracket 21 into the bottom or top mounting groove 111 to compress the spring until the limit plate on one side is disengaged from the mounting groove, and then rotate the mounting bracket 21 to remove the mounting bracket 21 from the range hood.

[0049] In this embodiment, if Figure 7 As shown, the mounting frame 21 includes a first supporting tube 211 and a second supporting tube 212 which are arranged opposite to each other in the upper and lower parts. Both ends of the first supporting tube 211 and the second supporting tube 212 are respectively provided with columns 213 so that the mounting frame 21 has a circular structure.

[0050] like Figure 4 and Figure 5 As shown, a first plug hole 2112 is opened on the first support tube 211, and a first plug column 223 plugged into the first plug hole 2112 is fixedly provided at the bottom of the oil guide plate 22, and the top of the oil guide plate 22 abuts against the second support tube 212, thereby realizing the installation of the oil guide plate 22.

[0051] like Figure 4 and Figure 5 As shown, the first support tube 211 is provided with a second plug-in hole 2113, the second support tube 212 is provided with a third plug-in hole 2126, the top of the oil baffle plate 23 is fixedly provided with a second plug-in column 232 plugged into the third plug-in hole 2126, and the bottom of the oil baffle plate 23 is fixedly provided with a third plug-in column 233 plugged into the second plug-in hole 2113, thereby realizing the installation of the oil baffle plate 23.

[0052] In order to realize the installation of the column 213, in this embodiment, as Fig.10As shown, both ends of the first support tube 211 are provided with plug-in ports 2114, the ends of the second support tube 212 are provided with bolt holes 2125 and mounting holes 2124 aligned with the bolt holes 2125, the bottom of the column 213 is welded with a plug-in component 2133 plugged into the plug-in port 2114, the top of the column 213 is welded with a positioning component 2131, and the bolt hole 2125 is plugged with a bolt 2132 fixed to the positioning component 2131. When the bolt 2132 is installed, it is inserted into the bolt hole 2125 from top to bottom through the mounting hole 2124, and then the bolt 2132 is tightened to achieve the installation of the column 213.

[0053] The inner wall of the second support tube 212 is provided with a guide groove 2122, in which a circuit board 214 is inserted, and the circuit board 214 is provided with a plurality of second plug connectors 2141 electrically connected to the first connector 2222, and the second support tube 212 is also provided with a through hole 2123 for the first plug connector 2222 to extend to the inside of the second support tube 212, at which time the circuit board 214 forms a series circuit with the switch of the range hood and the external power supply. Since the first plug connector 2222 and the second plug connector 2141 are both inside the second support tube 212, it is possible to prevent the oil smoke from interfering with the circuit of the heater 222.

[0054] In this embodiment, the connection between the oil baffle plate 23 and the cooling device adopts a quick connector. When the oil baffle plate 23 and the oil guide plate 22 on the mounting frame 21 need to be cleaned, it is only necessary to disconnect the quick connector to achieve the overall disassembly of the mounting frame 21. This method is more convenient for disassembly and also facilitates the cleaning of the oil baffle plate and the oil guide plate.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A fume gas purification device, comprising a housing (1), the housing (1) being provided with an air inlet (11), a mounting frame (21) in a circular shape being installed at the air inlet (11), and an oil fume separation device (2) being installed on the mounting frame (21); characterized in that: The oil fume separation device (2) comprises a plurality of oil guide plates (22), a plurality of oil baffle plates (23) and a cooling device for cooling the oil baffle plates (23), wherein the plurality of oil guide plates (22) are arranged longitudinally and tilted and are mounted on the front side of the air inlet (11), the plurality of oil baffle plates (23) are arranged longitudinally and tilted on the rear side of the oil guide plates (22) and the side edges of the oil baffle plates (23) extend into the oil guide plates (22), the oil guide plates (22) and the oil baffle plates (23) are mounted on the mounting frame (21), and the oil baffle plates (23) are arranged longitudinally and tilted. The cooling device provides circulating coolant for the oil baffle plate (23); an oil cup (14) for receiving the oil in the oil guide plate (22) is installed at the bottom of the housing (1); an inwardly recessed heating groove (221) is provided at the end of the oil guide plate (22); a heater (222) is provided inside the heating groove (221); the heater (222) is electrically connected to the switch of the range hood and an external power supply to form a series circuit; the mounting frame (21) comprises two first support tubes (211) and a second support tube (212) arranged opposite to each other. The invention relates to a second support tube (212), and a column (213) located between the first support tube (211) and the second support tube (212), wherein the first support tube (211) is provided with a first plug hole (2112), the bottom end of the oil guide plate (22) is fixedly provided with a first plug column (223) plugged into the first plug hole (2112), and the second support tube (212) is abutted against the top end of the oil guide plate (22); a circuit board (214) is installed on the inner wall of the second support tube (212), and the circuit board (214) is provided on the inner wall of the second support tube (212). The circuit board (214) is connected to the circuit of the range hood, and a plurality of second connectors (2141) are electrically connected to the circuit board (214). A heating wire (2221) is provided inside the heater (222), and the end of the heating wire (2221) is electrically connected to a first connector (2222). The second support tube (212) is provided with a through hole (2123) for the first connector (2222) to pass through, and the first connector (2222) is electrically connected to the second connector (2141).

2. The oil fume gas purification device according to claim 1, characterized in that: A cooling chamber (231) for storing coolant is provided in the oil baffle plate (23); a liquid inlet pipe (234) and a liquid outlet pipe (235) in communication with the cooling chamber (231) are provided on the oil baffle plate (23); the liquid inlet pipe (234) and the liquid outlet pipe (235) are respectively located at two ends of the oil baffle plate (23); and the cooling chambers (231) of two adjacent oil baffle plates (23) are connected via the liquid inlet pipe (234) and the liquid outlet pipe (235).

3. The oil fume gas purification device according to claim 2, characterized in that: The cooling device comprises a water-cooled radiator (3), a cooling fan (31), a liquid storage barrel (4), a water pump (5) and a plurality of connecting pipes. The cooling fan (31) is installed on the water-cooled radiator (3). The liquid inlet of the water-cooled radiator (3) is connected to one of the cooling chambers (231). The liquid outlet of the water-cooled radiator (3) is connected to the liquid storage barrel (4). The liquid inlet of the water pump (5) is connected to the liquid storage barrel (4). The liquid outlet of the water pump (5) is connected to one of the cooling chambers (231).

4. The oil fume gas purification device according to claim 1, characterized in that: The bottom wall and the top wall of the air inlet (11) are both provided with mounting grooves (111), and the outer side of the mounting frame (21) is fixedly provided with limit plates inserted into the interior of the mounting grooves (111) on upper and lower sides, and the side walls of the limit plates on upper and lower sides are both against the side walls of the mounting grooves (111).

5. The oil fume gas purification device according to claim 4, characterized in that: An elastic element is fixedly disposed in at least one of the installation grooves (111); when the elastic element is compressed, the limiting plate on one side extends out of the installation groove (111) on the same side.

6. The oil fume gas purification device according to claim 1, characterized in that: The oil guide plate (22) is U-shaped, the opening of the oil guide plate (22) faces the interior of the range hood, and a guide plate (224) is fixedly provided at the bottom of the oil guide plate (22) to assist oil in entering the interior of the oil cup (14).

7. The oil fume gas purification device according to claim 1, characterized in that: The first support tube (211) is provided with a second plug-in hole (2113), the second support tube (212) is provided with a third plug-in hole (2126), the top of the oil baffle plate (23) is fixedly provided with a second plug-in column (232) plugged into the third plug-in hole (2126), and the bottom of the oil baffle plate (23) is fixedly provided with a third plug-in column (233) plugged into the inside of the second plug-in hole (2113).

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