Small oil smoke purification device for outdoor barbecue

Abstract

The utility model relates to the technical field of oil fume purification treatment, in particular to a small oil fume purification device for outdoor barbecue, which comprises a grill and further comprises a fume suction device positioned above the rear side of the grill; the atomization device is located on the rear side of the smoke suction device and communicates with the smoke suction device; the water treatment device is positioned on the lower side of the atomization device and is communicated with the atomization device; the secondary purification device is located on the right side of the atomization device and communicates with the atomization device; the oil filtering device is positioned on the lower side of the grill and is communicated with the secondary purification device; and the intelligent control system comprises a master console, a plurality of first oil smoke concentration monitoring sensors arranged at the air inlet of the smoke suction device, and a second oil smoke concentration monitoring sensor arranged at the outlet of the secondary purification device. According to the invention, the pollution to the environment is reduced, and the concentration of pollutants discharged into the environment is obviously reduced; and the comfort and experience of outdoor barbecue are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil fume purification treatment, in particular to an oil fume purification device for small outdoor barbecue. BACKGROUND

[0002] The oil fume generated by barbecue contains strong carcinogens such as benzopyrene and volatile nitrosamine, and long-term contact will cause serious damage to the human body and endanger people's health. Therefore, it is crucial to design an oil fume purification device for small outdoor barbecue. SUMMARY

[0003] In order to solve the above technical problems, the present application provides an oil fume purification device for small outdoor barbecue.

[0004] The technical problem to be solved by the present application is solved by the following technical scheme:

[0005] An oil fume purification device for small outdoor barbecue, comprising a barbecue grill, further comprising:

[0006] A smoke suction device is located above the rear side of the barbecue grill and is used to suck the oil fume generated during the use of the barbecue grill;

[0007] An atomization device is located behind the smoke suction device and is in communication with the smoke suction device, and is used to atomize the oil fume sucked by the smoke suction device to convert the oil fume particles into small particle smoke and water-oil mixture, and to perform water-oil separation treatment on the water-oil mixture;

[0008] A water treatment device is located below the atomization device and is in communication with the atomization device, and is used to filter the waste water separated by the atomization device and then flow into the atomization device;

[0009] A secondary purification device is located on the right side of the atomization device and is in communication with the atomization device, and is used to perform secondary filtration on the small particle smoke atomized by the atomization device;

[0010] An oil filtering device is located below the barbecue grill and is in communication with the secondary purification device, and uses the temperature of the barbecue grill to prevent impurity oil from solidifying to facilitate discharge;

[0011] An intelligent control system, comprising a general control console, a plurality of first oil fume concentration monitoring sensors arranged at the air inlet of the smoke suction device for monitoring the oil fume concentration, and a second oil fume concentration monitoring sensor arranged at the outlet of the secondary purification device for monitoring the oil fume concentration, the plurality of first oil fume concentration monitoring sensors and the second oil fume concentration monitoring sensor are in communication connection with the general control console.

[0012] As a further improvement of the present application, the smoking device comprises a hierarchical fume collecting device, a high-temperature-resistant filter screen arranged behind the air inlet of the hierarchical fume collecting device, a plurality of first oil fume concentration monitoring sensors correspondingly arranged in the grooves of the inner side edges of the air inlets of the hierarchical fume collecting device and covered with baffles, and the hierarchical fume collecting device is controlled by the general control console.

[0013] As a further improvement of the present application, the air inlets of the hierarchical fume collecting device are of chute type structure, and the high-temperature-resistant filter screen is composed of a textile fiber filter screen wrapped by high-temperature-resistant fibers on both sides.

[0014] As a further improvement of the present application, the atomizing device comprises a primary oil fume collecting device connected with the hierarchical fume collecting device, an atomizing nozzle arranged in the opposite surface groove of the air inlet of the primary oil fume collecting device, a scraper arranged inside the primary oil fume collecting device, a water-oil treatment tank arranged at the bottom of the primary oil fume collecting device, and a water storage tank arranged behind the primary oil fume collecting device, the water-oil treatment tank is below the scraper, the water storage tank is connected with the atomizing nozzle, and the atomizing nozzle is controlled by the general control console.

[0015] As a further improvement of the present application, the water-oil treatment tank is internally provided with two layers of disposable filter materials, and a primary filter screen is arranged in the middle, the bottom of the water-oil treatment tank is provided with a discharge pipeline, the discharge pipeline is connected with the water treatment device, and the bottom of the water-oil treatment tank is of slope shape.

[0016] As a further improvement of the present application, the water treatment device comprises a water inlet pipeline connected with the discharge pipeline, an activated carbon filter screen connected with the water inlet pipeline, and a water outlet pipeline connected with the activated carbon filter screen, and the water outlet pipeline is connected with the water storage tank.

[0017] As a further improvement of the present application, the secondary purification device comprises an oil filter core connected with the primary oil fume collecting device and the oil filter device, and a backflow pipeline connected with the oil filter core and the oil filter device.

[0018] As a further improvement of the present application, the oil filter core comprises a stainless steel woven mesh, a chemical fiber filter paper, and activated carbon filter cotton which are sequentially sleeved together from outside to inside, and filter core covers are arranged at both ends, and the inside of the oil filter core is provided with a ball screw transmission device for expanding or contracting the oil filter core.

[0019] As a further improvement of the present application, the ball screw transmission device comprises a motor, a shaft coupling connected with the motor, a screw rod connected with the shaft coupling, and a nut seat arranged on the screw rod, the nut seat is connected with the oil filter core, and the motor is controlled by the general control console.

[0020] As a further improvement of the present application, the oil filtering device comprises an oil fume heating pipeline, the bottom of the oil fume heating pipeline is in a slope shape, the oil fume heating pipeline is communicated with an oil filter element and the return pipeline, and the second oil fume concentration monitoring sensor is arranged inside the oil fume heating pipeline and located at the communication position of the oil filter element and the oil fume heating pipeline.

[0021] The present application has the following advantages:

[0022] The present application provides an oil fume purification device for small outdoor barbecue, which has the following advantages compared with the prior art:

[0023] 1. The device adopts a pure mechanical structure, which is more suitable for users to carry and install and build outdoors, is not easy to damage, and is convenient to maintain;

[0024] 2. The intelligent sensing system is combined for multi-point linkage, and the intelligent control system can automatically adjust the working state of the smoke suction device according to the change of the oil fume concentration, thereby improving the automation degree and operation convenience of the equipment;

[0025] 3. The use of stainless steel woven mesh, chemical fiber filter paper and activated carbon filter cotton improves the durability and service life of the equipment, and the use of high-temperature resistant fibers and natural fibers as filter mesh materials and environmentally friendly materials such as diatomite as filter materials reduces pollution to the environment;

[0026] 4. By reducing the generation and emission of oil fume, the comfort and experience of outdoor barbecue are improved;

[0027] 5. Through the multi-stage processing of the hierarchical smoke collecting device, high-temperature resistant filter screen, atomization device, secondary purification device and oil filtering device, the oil fume and suspended particulate matter generated during the barbecue process can be efficiently removed, and the pollutant concentration emitted into the environment is significantly reduced;

[0028] 6. The temperature of the charcoal fire on the barbecue grill is used to heat the oil fume, preventing the oil fume from solidifying in the pipeline, thereby avoiding the problem of pipeline blockage. At the same time, this design does not require additional energy consumption, achieving efficient use of energy;

[0029] 7. The water treatment device is used to treat wastewater to provide water for the atomization nozzle, realizing the recycling of water and reducing energy loss. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application will be further described below in conjunction with the drawings and examples:

[0031] Figure 1 The present application is a structural schematic diagram;

[0032] Figure 2This is a schematic diagram of the smoking device in this invention;

[0033] Figure 3 This is a schematic diagram showing the connection between the smoking device and the atomizing device in this invention;

[0034] Figure 4 This is a frontal cross-sectional view of the atomizing device in this invention;

[0035] Figure 5 This is a schematic diagram of the rear structure of the atomizing device in this invention;

[0036] Figure 6 This is a schematic diagram of the water treatment device in this invention;

[0037] Figure 7 This is a schematic diagram of the secondary purification device in this invention;

[0038] Figure 8 This is a schematic diagram of the ball screw transmission device in this invention;

[0039] Figure 9 This is a schematic diagram of the oil filtration device in this invention;

[0040] Figure 10 This is a structural block diagram of the intelligent control system in this invention;

[0041] Figure 11 This is a flowchart of the process of the present invention.

[0042] In the picture:

[0043] 1. Smoking device; 11. Staged smoke collection device; 12. High-temperature resistant filter;

[0044] 2. Atomizing device; 21. Primary oil fume collection device; 22. Atomizing nozzle; 23. Scraper; 24. Water and oil treatment tank; 241. Disposable filter material; 242. Primary filter screen; 243. Discharge pipe; 25. Water storage tank;

[0045] 3. Water treatment device; 31. Inlet pipe; 32. Activated carbon filter; 33. Outlet pipe;

[0046] 4. Secondary purification device; 41. Oil filter element; 411. Stainless steel woven mesh; 412. Chemical fiber filter paper; 413. Activated carbon filter cotton; 414. Filter element cover; 415. Ball screw drive device; 4151. Motor; 4152. Coupling; 4153. Nut seat; 4154. Screw; 42. Return pipe;

[0047] 5. Oil filtration device; 51. Fume heating pipe;

[0048] 6. Intelligent control system; 60. Central control console; 61. First oil fume concentration monitoring sensor; 62. Second oil fume concentration monitoring sensor;

[0049] 7. Barbecue grill. Detailed Implementation

[0050] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] like Figure 1 As shown, a small outdoor barbecue fume purification device includes a fume extraction device 1, an atomizing device 2, a water treatment device 3, a secondary purification device 4, an oil filtration device 5, an intelligent control system 6, and a barbecue grill 7.

[0052] Furthermore, such as Figure 2 As shown, the fumigation device 1 is located above and behind the barbecue grill 7, and is used to draw in the fumes generated during the use of the barbecue grill 7. The fumigation device 1 includes a graded fumigation collection device 11 and a high-temperature resistant filter 12. The air inlet of the graded fumigation collection device 11 has a sloping groove structure. The sloping groove structure has a larger area in a limited space, making the air inlet larger and better able to draw in the fumes. The high-temperature resistant filter 12 is located behind the air inlet of the graded fumigation collection device 11. The high-temperature resistant filter 12 is composed of a textile fiber filter screen wrapped with high-temperature resistant fibers on both sides. The high-temperature resistant fibers are malleable and can withstand temperatures up to 1500℃, while the carbon temperature of the barbecue grill 7 is mainly 600℃, with a maximum of 1000℃, which can fully withstand the carbon temperature of the barbecue grill 7. In addition, compared with hardware fibers, many textile fibers have lower production costs, and the natural fibers in textile fibers are renewable and biodegradable resources with less environmental impact.

[0053] Furthermore, such as Figure 3 , Figure 4 and Figure 5As shown, the atomizing device 2 is located behind and connected to the smoking device 1. It atomizes the oil fumes inhaled by the smoking device 1, converting the oil fume particles into a small particulate smoke and a water-oil mixture, and then separates the water-oil mixture. The atomizing device 2 includes a primary oil fume collection device 21, an atomizing nozzle 22, a scraper 23, a water-oil treatment tank 24, and a water storage tank 25. The primary oil fume collection device 21 is connected to the graded smoke collection device 11. The primary oil fume collection device 21 is a hollow cylinder made of high-temperature resistant material with a smooth inner surface. Compared to a cube, a cylinder has a larger space, allowing it to absorb more oil fumes. The atomizing nozzle 22 is installed in the groove on the inner side of the ring of the primary oil fume collection device 21 opposite to the air inlet, and the water outlet is covered with a baffle. The atomizing nozzle 22 is controlled by the intelligent control system 6, which can control the size of the liquid mist and the working status of the nozzle. The scraper 23 is installed inside the primary oil fume collection device 21. The scraper 23 is made of silicone, which has good thermal stability and high temperature resistance, and is non-toxic, odorless, and colorless. The scraper 23 is shovel-shaped, which can cover a large area at once, reducing the number of repeated scrapings and improving work efficiency. The water-oil treatment tank 24 is installed at the bottom of the primary oil fume collection device 21. The interior of the water-oil treatment tank 24 is equipped with disposable filter material 241 and a primary filter screen 242. The bottom of the water-oil treatment tank 24 is provided with a discharge pipe 243 connected to the water treatment device 3. The bottom of the water-oil treatment tank 24 is sloping, so wastewater can flow into the water treatment device 3 by gravity without the need for a power device, reducing energy consumption. The disposable filter material 241 is divided into upper and lower layers, with the primary filter screen 242 located in the middle. The disposable filter material 241 is made of diatomaceous earth, which is an environmentally friendly material. The diatomaceous earth absorbs the grease scraped off by the scraper 23, while the water remains in the lower layer. Diatomaceous earth can be thrown into the trash can after grilling, while water flows into the water treatment device 3 through the discharge pipe 243. The water storage tank 25 is located behind the primary oil fume collection device 21, and the water storage tank 25 is connected to the atomizing nozzle 22 to supply water for the atomizing nozzle 22 during atomization.

[0054] Furthermore, such as Figure 6As shown, the water treatment device 3 is located below and connected to the atomizing device 2, and is used to filter the wastewater separated by the atomizing device 2 before it flows back into the atomizing device 2. The water treatment device 3 includes an inlet pipe 31, an activated carbon filter 32, and an outlet pipe 33. The inlet pipe 31 is connected to the outlet pipe 243. The activated carbon filter 32 is connected to both the inlet pipe 31 and the outlet pipe 33. The outlet pipe 33 is connected to the water storage tank 25 in the atomizing device 2. The water treated by the water treatment device 3 provides water to the atomizing nozzles 22 on the atomizing device 2, realizing water recycling and reducing energy consumption.

[0055] Furthermore, such as Figure 7 and Figure 8 As shown, the secondary purification device 4 is located to the right of the atomizing device 2 and is connected to the atomizing device 2. It is used for secondary filtration of the small particulate smoke after atomization by the atomizing device 2. The secondary purification device 4 includes an oil filter element 41 and a return pipe 42. The oil filter element 41 is composed of a stainless steel woven mesh 411, a chemical fiber filter paper 412, an activated carbon filter cotton 413, and filter element caps 414 at both ends, which are sequentially nested together from the outside to the inside. The oil filter element 41 is a deformable filter element. When the oil smoke concentration is high, the filter element expands to increase the filtration area and increase the filtration efficiency; when the oil smoke concentration is low, the filter element contracts to reduce energy loss. The oil filter element can adapt to different working conditions, improving the operating efficiency and stability of the device. The stainless steel woven mesh 411 is resistant to high temperature oxidation and wear. The chemical fiber filter paper 412 has the characteristics of high-efficiency filtration, good air permeability, easy cleaning, and reusability. The activated carbon filter cotton 413 is made by adding activated carbon particles to ordinary filter cotton, which has a strong adsorption capacity and can effectively adsorb harmful gases and odors in the air.

[0056] In this embodiment, a ball screw drive device 415 is provided inside the oil filter element 41, which realizes the expansion and contraction of the oil filter element 41. Further, the ball screw drive device 415 includes a motor 4151, a coupling 4152, a nut seat 4153, and a lead screw 4154. The motor 4151 is connected to the coupling 4152, the coupling 4152 is connected to the lead screw 4154, and the nut seat 4153 is disposed on the lead screw 4154. The motor 4151 is the actuator that drives the deformation of the oil filter element 41, providing power; the coupling 4152 is used to connect the motor 4151 and the lead screw 4154; the nut seat 4153 is connected to the oil filter element 41 and can move linearly on the lead screw 4154, realizing the deformation of the oil filter element 41. Furthermore, the return pipe 42 has a one-way plate at both ends to prevent oil fumes that meet national emission standards from entering its interior.

[0057] Furthermore, such as Figure 9 As shown, the oil filtration device 5 is located below the barbecue grill 7 and connected to the secondary purification device 4. It utilizes the temperature of the barbecue grill 7 to prevent impurities from solidifying, facilitating their discharge. The oil filtration device 5 includes an oil fume heating pipe 51, the bottom of which is sloping. The oil fume heating pipe 51 is connected to the oil filter element 41 and the return pipe 42. The oil fume heating pipe 51 heats the multi-stage filtered oil fumes using the carbon temperature of the barbecue grill, preventing the oil fumes from solidifying and becoming difficult to remove. Simultaneously, the use of carbon temperature for heating achieves efficient energy utilization.

[0058] Furthermore, such as Figure 10 As shown, the intelligent control system 6 includes a central control console 60, a first oil fume concentration monitoring sensor 61, and a second oil fume concentration monitoring sensor 62. Both the first oil fume concentration monitoring sensor 61 and the second oil fume concentration monitoring sensor 62 are communicatively connected to the central control console 60. The graded smoke collection device 11, the atomizing nozzle 22, and the motor 4151 are communicatively controlled by the central control console 60. Both the first oil fume concentration monitoring sensor 61 and the second oil fume concentration monitoring sensor 62 are used for oil fume concentration monitoring. Several first oil fume concentration monitoring sensors 61 are installed in corresponding grooves on the inner side of several air inlets of the graded smoke collection device 11 and covered with baffles. The second oil fume concentration monitoring sensor 62 is located inside the oil fume heating pipe 51 and at the connection point between the oil filter element 41 and the oil fume heating pipe 51.

[0059] Working principle and usage process of this invention:

[0060] like Figure 11As shown, during use, the fumes generated by the barbecue grill 7 are sucked into the graded fume collection device 11. The fumes pass through the high-temperature resistant filter 12 for initial filtration of large particles, removing large particles and some impurities, but still containing a certain amount of fine particles and harmful gases. The small particles of fumes processed by the fume collection device 1 enter the atomizing device 2, and the atomizing nozzle 22 starts working, converting the fumes into a solid-liquid state. After the barbecue is finished, the baffle on the scraper 23 opens, and the scraper 23 starts working, scraping off the grease accumulated on the inner wall of the primary fume collection device 21 into the water-oil treatment tank 24. The grease is then filtered by the diatomaceous earth filter material 241. Soil adsorption occurs, while water passes through the primary filter 242 to the lower layer, and then flows into the water treatment device 3 through the discharge pipe 243. During the above process, the first oil fume concentration monitoring sensor 61 monitors the oil fume concentration at the air inlet of the graded smoke collection device 11 and feeds the data back to the central control console 60. The central control console 60 outputs corresponding signals based on the feedback data. If the concentration is high, the suction will be increased to better absorb the oil fumes; otherwise, the suction will be reduced. When the oil fume concentration is concentrated at a certain air inlet, the airflow and the workload of the atomizing nozzle 22 at that air inlet can be increased according to the site conditions. If there is only oil fume in a certain area, a certain air inlet can be selectively opened. Wastewater flows into the water treatment device 3 through the inlet pipe 31, and after being filtered by the activated carbon filter 32, it flows into the outlet pipe 33 and enters the water storage tank 25 of the atomizing device 2 to provide water for the atomizing nozzles 22. Small particulate smoke enters the secondary purification device 4, passing through the stainless steel woven mesh 411, chemical fiber filter paper 412, and activated carbon filter cotton 413, further filtering small particulate oil fumes and SO2 harmful gases to meet national emission standards. When the second oil fume concentration monitoring sensor 62 detects a high oil fume concentration, it feeds the data back to the main control panel 60. Based on the feedback data, the main control panel 60 controls the motor 4151 to rotate forward, and the nut seat 4153 to move downward, causing the oil filter element 41 to expand, increasing the filtration area and increasing the filtration efficiency. When the second oil fume concentration monitoring sensor 62 detects a low oil fume concentration, the motor 4151 rotates backward. Rotate the nut seat 4153 upwards, causing the oil filter element 41 to contract, reducing the filtration area and energy loss. When the second oil fume concentration monitoring sensor 62 detects that the oil fume after the secondary purification device does not meet the national emission standards, it is discharged into the return pipe 42 and re-enters the secondary purification device 4 for further purification. Otherwise, it is discharged into the oil filter device 5. Since the oil fume impurity concentration after the above treatment has met the national emission standards, and the remaining impurity oil has cooled and solidified after multiple treatments and is difficult to flow, it is reheated by the carbon temperature in the barbecue grill through the oil fume heating pipe 51. The heated impurity oil then flows to the end of the oil fume heating pipe 51 and can be placed in a user's portable container, such as a used mineral water bottle. At the same time, the purified oil fume is discharged through the channel.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A small outdoor barbecue fume purification device, comprising a barbecue grill (7), characterized in that: Also includes: A smoking device (1) is located above the rear side of the barbecue grill (7) and is used to draw in the fumes generated when the barbecue grill (7) is in use; Atomizing device (2) is located behind the smoking device (1) and connected to the smoking device (1). It is used to atomize the oil fumes inhaled by the smoking device (1) to convert the oil fume particles into small particulate smoke and water-oil mixture, and to perform water-oil separation treatment on the water-oil mixture. A water treatment device (3) is located below the atomizing device (2) and connected to the atomizing device (2), and is used to filter the wastewater separated by the atomizing device (2) before it flows into the atomizing device (2); A secondary purification device (4) is located on the right side of the atomizing device (2) and connected to the atomizing device (2), and is used to perform secondary filtration on the small particulate smoke after atomization by the atomizing device (2). The oil filter device (5) is located on the lower side of the barbecue grill (7) and is connected to the secondary purification device (4). It uses the temperature of the barbecue grill (7) to prevent impurity oil from solidifying so that it can be discharged easily. The intelligent control system (6) includes a central control console (60), several first oil fume concentration monitoring sensors (61) installed at the air inlet of the fume extraction device (1) for monitoring the oil fume concentration, and a second oil fume concentration monitoring sensor (62) installed at the outlet of the secondary purification device (4) for monitoring the oil fume concentration. The several first oil fume concentration monitoring sensors (61) and the second oil fume concentration monitoring sensor (62) are all communicatively connected to the central control console (60).

2. The small outdoor barbecue fume purification device according to claim 1, characterized in that: The smoking device (1) includes a graded smoke collection device (11), a high-temperature resistant filter (12) disposed behind the air inlet of the graded smoke collection device (11), and several first oil fume concentration monitoring sensors (61) correspondingly installed in the grooves on the inner side of several air inlets of the graded smoke collection device (11) and covered with baffles. The graded smoke collection device (11) is controlled by the main control panel (60).

3. The small outdoor barbecue fume purification device according to claim 2, characterized in that: The air inlet of the graded smoke collection device (11) is a sloping groove structure, and the high-temperature resistant filter (12) is composed of a textile fiber filter wrapped with high-temperature resistant fibers on both sides.

4. A small outdoor barbecue fume purification device according to claim 2, characterized in that: The atomizing device (2) includes a primary fume collection device (21) connected to the graded fume collection device (11), an atomizing nozzle (22) located in the groove on the opposite side of the air inlet of the primary fume collection device (21), a scraper (23) located inside the primary fume collection device (21), a water-oil treatment tank (24) located at the bottom of the primary fume collection device (21), and a water tank (25) located behind the primary fume collection device (21). The water-oil treatment tank (24) is located below the scraper (23), and the water tank (25) is connected to the atomizing nozzle (22). The atomizing nozzle (22) is controlled by the main control panel (60).

5. A small outdoor barbecue fume purification device according to claim 4, characterized in that: The water and oil treatment tank (24) is equipped with two layers of disposable filter material (241) inside, and a primary filter screen (242) is set in the middle. The bottom of the water and oil treatment tank (24) is equipped with a discharge pipe (243), which is connected to the water treatment device (3). The bottom of the water and oil treatment tank (24) is sloping.

6. A small outdoor barbecue fume purification device according to claim 5, characterized in that: The water treatment device (3) includes an inlet pipe (31) connected to the outlet pipe (243), an activated carbon filter (32) connected to the inlet pipe (31), and an outlet pipe (33) connected to the activated carbon filter (32). The outlet pipe (33) is connected to the water storage tank (25).

7. A small outdoor barbecue fume purification device according to claim 4, characterized in that: The secondary purification device (4) includes an oil filter element (41) connected to the primary oil fume collection device (21) and the oil filter device (5), and a return pipe (42) connected to the oil filter element (41) and the oil filter device (5).

8. A small outdoor barbecue fume purification device according to claim 7, characterized in that: The oil filter element (41) includes a stainless steel woven mesh (411), a chemical fiber filter paper (412), and an activated carbon filter cotton (413) arranged sequentially from the outside to the inside, and filter element caps (414) located at both ends. The oil filter element (41) is provided with a ball screw drive device (415) for expanding or contracting the oil filter element (41).

9. A small outdoor barbecue fume purification device according to claim 8, characterized in that: The ball screw drive device (415) includes a motor (4151), a coupling (4152) connected to the motor (4151), a lead screw (4154) connected to the coupling (4152), and a nut seat (4153) provided on the lead screw (4154). The nut seat (4153) is connected to the oil filter element (41). The motor (4151) is controlled by the main control panel (60).

10. A small outdoor barbecue fume purification device according to claim 7, characterized in that: The oil filtration device (5) includes an oil fume heating pipe (51), the bottom of which is sloping. The oil fume heating pipe (51) is connected to the oil filter element (41) and the return pipe (42). The second oil fume concentration monitoring sensor (62) is installed inside the oil fume heating pipe (51) and located at the connection between the oil filter element (41) and the oil fume heating pipe (51).

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